10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

 _________________________________________

FORM 10-Q

_________________________________________

þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2018

OR

¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Commission File Number 001-35077

_____________________________________ 

WINTRUST FINANCIAL CORPORATION

(Exact name of registrant as specified in its charter)

Illinois	36-3873352
(State of incorporation or organization)	(I.R.S. Employer Identification No.)

9700 W. Higgins Road, Suite 800

Rosemont, Illinois 60018

(Address of principal executive offices)

(847) 939-9000

(Registrant’s telephone number, including area code)

______________________________________ 

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  þ    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  þ    No  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer	þ		Accelerated filer	¨
Non-accelerated filer	¨	(Do not check if a smaller reporting company)	Smaller reporting company	¨
Emerging growth company	¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.    ¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ¨    No  þ

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.

Common Stock — no par value, 56,392,334 shares, as of October 31, 2018

TABLE OF CONTENTS

		Page
	PART I. — FINANCIAL INFORMATION
ITEM 1.	Financial Statements	1
ITEM 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	62
ITEM 3.	Quantitative and Qualitative Disclosures About Market Risk	104
ITEM 4.	Controls and Procedures	106
	PART II. — OTHER INFORMATION
ITEM 1.	Legal Proceedings	107
ITEM 1A.	Risk Factors	108
ITEM 2.	Unregistered Sales of Equity Securities and Use of Proceeds	108
ITEM 3.	Defaults Upon Senior Securities	NA
ITEM 4.	Mine Safety Disclosures	NA
ITEM 5.	Other Information	NA
ITEM 6.	Exhibits	109
	Signatures	110

PART I

ITEM 1. FINANCIAL STATEMENTS

WINTRUST FINANCIAL CORPORATION AND SUBSIDIARIES CONSOLIDATED STATEMENTS OF CONDITION
	(Unaudited)						(Unaudited)
(In thousands, except share data)	September 30, 2018			December 31, 2017			September 30, 2017
Assets
Cash and due from banks	$	279,936		$	277,534		$	251,896
Federal funds sold and securities purchased under resale agreements	57			57			56
Interest bearing deposits with banks	1,137,044			1,063,242			1,218,728
Available-for-sale securities, at fair value	2,164,985			1,803,666			1,665,903
Held-to-maturity securities, at amortized cost ($911.6 million, $812.5 million and $807.0 million fair value at September 30, 2018, December 31, 2017 and September 30, 2017 respectively)	966,438			826,449			819,340
Trading account securities	688			995			643
Equity securities with readily determinable fair value	36,414			—			—
Federal Home Loan Bank and Federal Reserve Bank stock	99,998			89,989			87,192
Brokerage customer receivables	15,649			26,431			23,631
Mortgage loans held-for-sale, at fair value	338,111			313,592			370,282
Loans, net of unearned income, excluding covered loans	23,123,951			21,640,797			20,912,781
Covered loans	—			—			46,601
Total loans	23,123,951			21,640,797			20,959,382
Allowance for loan losses	(149,756		)	(137,905		)	(133,119		)
Allowance for covered loan losses	—			—			(758		)
Net loans	22,974,195			21,502,892			20,825,505
Premises and equipment, net	664,469			621,895			609,978
Lease investments, net	199,241			212,335			193,828
Accrued interest receivable and other assets	700,568			567,374			580,612
Trade date securities receivable	—			90,014			189,896
Goodwill	537,560			501,884			502,021
Other intangible assets	27,378			17,621			18,651
Total assets	$	30,142,731		$	27,915,970		$	27,358,162
Liabilities and Shareholders’ Equity
Deposits:
Non-interest bearing	$	6,399,213		$	6,792,497		$	6,502,409
Interest bearing	18,517,502			16,390,850			16,392,654
Total deposits	24,916,715			23,183,347			22,895,063
Federal Home Loan Bank advances	615,000			559,663			468,962
Other borrowings	373,571			266,123			251,680
Subordinated notes	139,172			139,088			139,052
Junior subordinated debentures	253,566			253,566			253,566
Trade date securities payable	—			—			880
Accrued interest payable and other liabilities	664,885			537,244			440,034
Total liabilities	26,962,909			24,939,031			24,449,237
Shareholders’ Equity:
Preferred stock, no par value; 20,000,000 shares authorized:
Series D - $25 liquidation value; 5,000,000 shares issued and outstanding at September 30, 2018, December 31, 2017 and September 30, 2017	125,000			125,000			125,000
Common stock, no par value; $1.00 stated value; 100,000,000 shares authorized at September 30, 2018, December 31, 2017 and September 30, 2017; 56,486,573 shares issued at September 30, 2018, 56,068,220 shares issued at December 31, 2017 and 55,939,801 shares issued at September 30, 2017	56,486			56,068			55,940
Surplus	1,553,353			1,529,035			1,519,596
Treasury stock, at cost, 109,404 shares at September 30, 2018, 103,013 shares at December 31, 2017, and 101,738 shares at September 30, 2017	(5,547		)	(4,986		)	(4,884		)
Retained earnings	1,543,680			1,313,657			1,254,759
Accumulated other comprehensive loss	(93,150		)	(41,835		)	(41,486		)
Total shareholders’ equity	3,179,822			2,976,939			2,908,925
Total liabilities and shareholders’ equity	$	30,142,731		$	27,915,970		$	27,358,162

See accompanying notes to unaudited consolidated financial statements.

1

WINTRUST FINANCIAL CORPORATION AND SUBSIDIARIES CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED)
	Three Months Ended						Nine Months Ended
(In thousands, except per share data)	September 30, 2018			September 30, 2017			September 30, 2018			September 30, 2017
Interest income
Interest and fees on loans	$	271,134		$	223,897		$	761,191		$	628,876
Mortgage loans held-for-sale	5,285			3,223			12,329			10,267
Interest bearing deposits with banks	5,423			3,272			11,462			6,529
Federal funds sold and securities purchased under resale agreements	—			—			1			2
Investment securities	21,710			16,058			60,726			45,155
Trading account securities	11			8			29			23
Federal Home Loan Bank and Federal Reserve Bank stock	1,235			1,080			3,988			3,303
Brokerage customer receivables	164			150			488			473
Total interest income	304,962			247,688			850,214			694,628
Interest expense
Interest on deposits	48,736			23,655			110,578			58,396
Interest on Federal Home Loan Bank advances	1,947			2,151			9,849			6,674
Interest on other borrowings	2,003			1,482			5,400			3,770
Interest on subordinated notes	1,773			1,772			5,333			5,330
Interest on junior subordinated debentures	2,940			2,640			8,239			7,481
Total interest expense	57,399			31,700			139,399			81,651
Net interest income	247,563			215,988			710,815			612,977
Provision for credit losses	11,042			7,896			24,431			21,996
Net interest income after provision for credit losses	236,521			208,092			686,384			590,981
Non-interest income
Wealth management	22,634			19,803			68,237			59,856
Mortgage banking	42,014			28,184			112,808			86,061
Service charges on deposit accounts	9,331			8,645			27,339			25,606
Gains (losses) on investment securities, net	90			39			(249		)	31
Fees from covered call options	627			1,143			2,893			2,792
Trading (losses) gains, net	(61		)	(129		)	166			(869		)
Operating lease income, net	9,132			8,461			27,569			21,048
Other	16,163			13,585			42,079			43,943
Total non-interest income	99,930			79,731			280,842			238,468
Non-interest expense
Salaries and employee benefits	123,855			106,251			357,966			312,069
Equipment	10,827			9,947			31,426			28,858
Operating lease equipment depreciation	7,370			6,794			20,843			17,092
Occupancy, net	14,404			13,079			41,834			38,766
Data processing	9,335			7,851			26,580			23,580
Advertising and marketing	11,120			9,572			31,726			23,448
Professional fees	9,914			6,786			23,047			18,956
Amortization of other intangible assets	1,163			1,068			3,164			3,373
FDIC insurance	4,205			3,877			13,165			11,907
OREO expense, net	596			590			4,502			2,994
Other	20,848			17,760			60,502			54,194
Total non-interest expense	213,637			183,575			614,755			535,237
Income before taxes	122,814			104,248			352,471			294,212
Income tax expense	30,866			38,622			88,962			105,311
Net income	$	91,948		$	65,626		$	263,509		$	188,901
Preferred stock dividends	2,050			2,050			6,150			7,728
Net income applicable to common shares	$	89,898		$	63,576		$	257,359		$	181,173
Net income per common share—Basic	$	1.59		$	1.14		$	4.57		$	3.34
Net income per common share—Diluted	$	1.57		$	1.12		$	4.50		$	3.23
Cash dividends declared per common share	$	0.19		$	0.14		$	0.57		$	0.42
Weighted average common shares outstanding	56,366			55,796			56,268			54,292
Dilutive potential common shares	918			966			912			2,305
Average common shares and dilutive common shares	57,284			56,762			57,180			56,597

See accompanying notes to unaudited consolidated financial statements.

2

WINTRUST FINANCIAL CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED)

	Three Months Ended						Nine Months Ended
(In thousands)	September 30, 2018			September 30, 2017			September 30, 2018			September 30, 2017
Net income	$	91,948		$	65,626		$	263,509		$	188,901
Unrealized (losses) gains on available-for-sale securities
Before tax	(18,149		)	811			(63,788		)	25,783
Tax effect	4,872			(158		)	17,123			(9,968		)
Net of tax	(13,277		)	653			(46,665		)	15,815
Reclassification of net gains on available-for-sale securities included in net income
Before tax	1,001			39			6			31
Tax effect	(271		)	(15		)	(1		)	(12		)
Net of tax	730			24			5			19
Reclassification of amortization of unrealized gains and losses on investment securities transferred to held-to-maturity from available-for-sale
Before tax	33			33			49			1,483
Tax effect	(9		)	(13		)	(13		)	(583		)
Net of tax	24			20			36			900
Net unrealized (losses) gains on available-for-sale securities	(14,031		)	609			(46,706		)	14,896
Unrealized gains on derivative instruments
Before tax	212			394			4,369			1,699
Tax effect	(57		)	(158		)	(1,173		)	(669		)
Net unrealized gains on derivative instruments	155			236			3,196			1,030
Foreign currency adjustment
Before tax	2,586			5,643			(3,927		)	10,678
Tax effect	(644		)	(1,437		)	976			(2,762		)
Net foreign currency adjustment	1,942			4,206			(2,951		)	7,916
Total other comprehensive (loss) income	(11,934		)	5,051			(46,461		)	23,842
Comprehensive income	$	80,014		$	70,677		$	217,048		$	212,743

See accompanying notes to unaudited consolidated financial statements.

3

WINTRUST FINANCIAL CORPORATION AND SUBSIDIARIES CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS’ EQUITY (UNAUDITED)
(In thousands)	Preferred stock			Common stock		Surplus			Treasury stock			Retained earnings			Accumulated other comprehensive loss			Total shareholders’ equity
Balance at January 1, 2017	$	251,257		$	51,978	$	1,365,781		$	(4,589	)	$	1,096,518		$	(65,328	)	$	2,695,617
Net income	—			—		—			—			188,901			—			188,901
Other comprehensive income, net of tax	—			—		—			—			—			23,842			23,842
Cash dividends declared on common stock	—			—		—			—			(22,932		)	—			(22,932		)
Dividends on preferred stock	—			—		—			—			(7,728		)	—			(7,728		)
Stock-based compensation	—			—		8,160			—			—			—			8,160
Conversion of Series C preferred stock to common stock	(126,257		)	3,121		123,136			—			—			—			—
Common stock issued for:
Exercise of stock options and warrants	—			702		19,544			—			—			—			20,246
Restricted stock awards	—			79		(79		)	(295		)	—			—			(295		)
Employee stock purchase plan	—			28		1,893			—			—			—			1,921
Director compensation plan	—			32		1,161			—			—			—			1,193
Balance at September 30, 2017	$	125,000		$	55,940	$	1,519,596		$	(4,884	)	$	1,254,759		$	(41,486	)	$	2,908,925
Balance at January 1, 2018	$	125,000		$	56,068	$	1,529,035		$	(4,986	)	$	1,313,657		$	(41,835	)	$	2,976,939
Cumulative effect adjustment from the adoption of:
Accounting Standards Update (“ASU”) 2016-01	—			—		—			—			1,880			(1,880		)	—
ASU 2017-12	—			—		—			—			(116		)	—			(116		)
ASU 2018-02	—			—		—			—			2,974			(2,974		)	—
Net income	—			—		—			—			263,509			—			263,509
Other comprehensive loss, net of tax	—			—		—			—			—			(46,461		)	(46,461		)
Cash dividends declared on common stock	—			—		—			—			(32,074		)	—			(32,074		)
Dividends on preferred stock	—			—		—			—			(6,150		)	—			(6,150		)
Stock-based compensation	—			—		10,346			—			—			—			10,346
Common stock issued for:
Exercise of stock options and warrants	—			283		10,952			(192		)	—			—			11,043
Restricted stock awards	—			93		(93		)	(369		)	—			—			(369		)
Employee stock purchase plan	—			23		1,862			—			—			—			1,885
Director compensation plan	—			19		1,251			—			—			—			1,270
Balance at September 30, 2018	$	125,000		$	56,486	$	1,553,353		$	(5,547	)	$	1,543,680		$	(93,150	)	$	3,179,822

See accompanying notes to unaudited consolidated financial statements.

4

WINTRUST FINANCIAL CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)

	Nine Months Ended
(In thousands)	September 30, 2018			September 30, 2017
Operating Activities:
Net income	$	263,509		$	188,901
Adjustments to reconcile net income to net cash provided by operating activities
Provision for credit losses	24,431			21,996
Depreciation, amortization and accretion, net	48,908			46,514
Stock-based compensation expense	10,346			8,160
Net amortization of premium on securities	5,998			4,694
Accretion of discount on loans	(15,510		)	(16,885		)
Mortgage servicing rights fair value change, net	(3,660		)	1,338
Originations and purchases of mortgage loans held-for-sale	(3,027,658		)	(2,812,685		)
Proceeds from sales of mortgage loans held-for-sale	3,060,577			2,916,368
Bank owned life insurance ("BOLI") income	(5,448		)	(2,770		)
Decrease in trading securities, net	307			1,346
Net decrease in brokerage customer receivables	10,782			1,550
Gains on mortgage loans sold	(80,826		)	(67,239		)
Losses (gains) on investment securities, net	249			(31		)
Gains on sales of premises and equipment, net	(34		)	(88		)
Net losses on sales and fair value adjustments of other real estate owned	3,808			969
Increase in accrued interest receivable and other assets, net	(97,844		)	(63,064		)
Increase (decrease) in accrued interest payable and other liabilities, net	63,166			(80,099		)
Net Cash Provided by Operating Activities	261,101			148,975
Investing Activities:
Proceeds from maturities and calls of available-for-sale securities	222,387			215,522
Proceeds from maturities and calls of held-to-maturity securities	8,061			102,361
Proceeds from sales of available-for-sale securities	209,640			121,795
Proceeds from sales of equity securities with readily determinable fair value	1,895			—
Proceeds from sales and capital distributions of equity securities without readily determinable fair value	680			—
Purchases of available-for-sale securities	(777,324		)	(446,278		)
Purchases of held-to-maturity securities	(148,865		)	(287,976		)
Purchases of equity securities without readily determinable fair value	(3,779		)	—
(Purchase) redemption of Federal Home Loan Bank and Federal Reserve Bank stock, net	(10,009		)	46,302
Distributions from investments in partnerships, net	3,181			465
Net cash paid in business combinations	(13,749		)	(284		)
Proceeds from sales of other real estate owned	16,892			12,892
Cash paid to the FDIC related to reimbursements on covered assets	—			(258		)
Net increase in interest bearing deposits with banks	(75,636		)	(236,531		)
Net increase in loans	(1,304,555		)	(1,176,279		)
Redemption of BOLI	8,134			—
Purchases of premises and equipment, net	(52,639		)	(39,583		)
Net Cash Used for Investing Activities	(1,915,686		)	(1,687,852		)
Financing Activities:
Increase in deposit accounts	1,520,270			1,236,548
Increase (decrease) in subordinated notes and other borrowings, net	109,112			(20,111		)
Increase in Federal Home Loan Bank advances, net	52,000			313,000
Cash payments to settle contingent consideration liabilities recognized in business combinations	—			(1,058		)
Issuance of common shares resulting from the exercise of stock options, employee stock purchase plan and conversion of common stock warrants	14,390			23,360
Common stock repurchases for tax withholdings related to stock-based compensation	(561		)	(295		)
Dividends paid	(38,224		)	(30,660		)
Net Cash Provided by Financing Activities	1,656,987			1,520,784
Net Increase (Decrease) in Cash and Cash Equivalents	2,402			(18,093		)
Cash and Cash Equivalents at Beginning of Period	277,591			270,045
Cash and Cash Equivalents at End of Period	$	279,993		$	251,952

See accompanying notes to unaudited consolidated financial statements.

5

WINTRUST FINANCIAL CORPORATION AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

(1) Basis of Presentation

The consolidated financial statements of Wintrust Financial Corporation and Subsidiaries (“Wintrust” or the “Company”) presented herein are unaudited, but in the opinion of management reflect all necessary adjustments of a normal or recurring nature for a fair presentation of results as of the dates and for the periods covered by the consolidated financial statements.

The accompanying consolidated financial statements are unaudited and do not include information or footnotes necessary for a complete presentation of financial condition, results of operations or cash flows in accordance with U.S. generally accepted accounting principles ("GAAP"). The unaudited consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017 (“2017 Form 10-K”). Operating results reported for the period are not necessarily indicative of the results which may be expected for the entire year. Reclassifications of certain prior period amounts have been made to conform to the current period presentation.

The preparation of the financial statements requires management to make estimates, assumptions and judgments that affect the reported amounts of assets and liabilities. Management believes that the estimates made are reasonable, however, changes in estimates may be required if economic or other conditions develop differently from management’s expectations. Certain policies and accounting principles inherently have a greater reliance on the use of estimates, assumptions and judgments and as such have a greater possibility of producing results that could be materially different than originally reported. Management views critical accounting policies to be those which are highly dependent on subjective or complex judgments, estimates and assumptions, and where changes in those estimates and assumptions could have a significant impact on the financial statements. Management currently views the determination of the allowance for loan losses and the allowance for losses on lending-related commitments, loans acquired with evidence of credit quality deterioration since origination, estimations of fair value, the valuations required for impairment testing of goodwill, the valuation and accounting for derivative instruments and income taxes as the accounting areas that require the most subjective and complex judgments, and as such could be the most subject to revision as new information becomes available. Descriptions of the Company's significant accounting policies are included in Note 1 - “Summary of Significant Accounting Policies” of the 2017 Form 10-K.

(2) Recent Accounting Developments

Revenue Recognition

In May 2014, the Financial Accounting Standards Board ("FASB") issued ASU No. 2014-09, which created “Revenue from Contracts with Customers (Topic 606),” to clarify the principles for recognizing revenue and develop a common revenue standard for customer contracts. This ASU provides guidance regarding how an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The ASU also added a new subtopic to the codification, ASC 340-40, “Other Assets and Deferred Costs: Contracts with Customers” to provide guidance on costs related to obtaining and fulfilling a customer contract. Furthermore, the new standard requires disclosure of sufficient information to enable users of financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. At the time ASU No. 2014-09 was issued, the guidance was effective for fiscal years beginning after December 15, 2016. In July 2015, the FASB approved a deferral of the effective date by one year, which resulted in the guidance becoming effective for the Company as of January 1, 2018.

The FASB continued to issue various updates to clarify and improve specific areas of ASU No. 2014-09. In March 2016, the FASB issued ASU No. 2016-08, “Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net),” to clarify the implementation guidance within ASU No. 2014-09 surrounding principal versus agent considerations and its impact on revenue recognition. In April 2016, the FASB issued ASU No. 2016-10, “Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing,” to also clarify the implementation guidance within ASU No. 2014-09 related to these two topics. In May 2016, the FASB issued ASU No. 2016-11, “Revenue Recognition (Topic 605) and Derivative and Hedging (Topic 815): Rescission of SEC Guidance Because of Accounting Standards Updates 2014-09 and 2014-16 Pursuant to Staff Announcements at the March 3, 2016 EITF Meeting,” to remove certain areas of SEC Staff Guidance from those specific Topics. In May 2016 and December 2016, the FASB issued ASU 2016-12, “Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients” and ASU 2016-20, “Technical Corrections and Improvements to Topic 606, Revenue from Contracts with Customers,” to clarify specific aspects of implementation, including the collectability criterion, exclusion of sales taxes collected from a transaction price, noncash

6

consideration, contract modifications, completed contracts at transition, the applicability of loan guarantee fees, impairment of capitalized contract costs and certain disclosure requirements. In February 2017, the FASB issued ASU No. 2017-05, “Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets,” to clarify the implementation guidance within ASU No. 2014-09 surrounding transfers of nonfinancial assets, including partial sales of such assets, and its impact on revenue recognition. Like ASU No. 2014-09, this guidance became effective for the Company starting January 1, 2018.

The Company adopted ASU No. 2014-09 and all subsequent updates issued to clarify and improve specific areas of this ASU as of January 1, 2018. As certain significant revenue sources related to financial instruments such as interest income are considered not in-scope, the new guidance did not have a significant impact on the Company's consolidated financial statements. Revenue sources impacted by the new guidance include brokerage and trust and asset management fees from the wealth management business unit, card-based fees, deposit-related fees and other non-interest income. During implementation, the Company reviewed specific contracts with customers across these various sources of revenue. Reviews of such contracts assisted in identifying any characteristics of such contracts that could result in a change in the Company's current practices for recognition of revenue and recognition of costs incurred to obtain or fulfill such contracts. After review of such contracts, the Company identified no indication within the terms of such contracts that a significant change in the Company's current practices and accounting policies was necessary. The Company elected to adopt the new guidance using the modified retrospective approach applied to all contracts as of the date of initial application at January 1, 2018. Electing the modified retrospective approach resulted in no cumulative effect adjustment to the opening balance of retained earnings at the date of initial application. Additional disclosures have been added in accordance with the new guidance. See Note 13 – Revenue from Contracts with Customers for discussion of the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers.

Financial Instruments

In January 2016, the FASB issued ASU No. 2016-01, “Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities,” to improve the accounting for financial instruments. This ASU requires equity securities with readily determinable fair values to be measured at fair value with changes recognized in net income. Such equity securities with readily determinable fair values are no longer classified as available-for-sale securities or trading securities within the consolidated financial statements of an entity. For equity securities without a readily determinable fair value, the value of the equity securities may be elected to be measured at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer instead of fair value, unless a qualitative assessment indicates impairment. Additionally, this ASU requires the separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or the accompanying notes to the financial statements.

The Company adopted this guidance as of January 1, 2018. For equity securities with a readily determinable fair value, this guidance was applied under a modified retrospective approach with a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption. As of January 1, 2018, the Company reclassified approximately $1.9 million from accumulated other comprehensive income, related to previously recognized unrealized gains, net of deferred taxes, from equity securities with readily determinable fair values, to retained earnings. Equity securities with readily determinable fair values are now prospectively presented separate from available-for-sale securities and trading securities within the Company's Consolidated Statements of Condition. Additionally, for the nine months ended September 30, 2018, the Company recognized $456,000 of net unrealized gains from equity securities with readily determinable fair values directly to earnings. For equity securities without a readily determinable fair value, the Company elected to measure such investments at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer, unless a qualitative assessment indicates impairment, which was applied prospectively. Equity securities without readily determinable fair values are included within accrued interest receivable and other assets within the Company's Consolidated Statements of Condition. See Note 5 - Investment Securities for further discussion of equity securities with and without readily determinable fair values.

In January 2018, the FASB issued ASU No. 2018-03, “Technical Corrections and Improvements to Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities,” to clarify certain aspects of the guidance issued in ASU No. 2016-01, including aspects of equity securities without a readily determinable fair value. This guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years beginning after June 15, 2018. Early adoption is permitted. As these clarifications did not have a material impact on the Company's consolidated financial statements, the Company elected to early adopt this guidance as of January 1, 2018.

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Leases

In February 2016, the FASB issued ASU No. 2016-02, “Leases (Topic 842),” to improve transparency and comparability across entities regarding leasing arrangements. This ASU requires the recognition of a separate lease liability representing the required discounted lease payments over the lease term and a separate lease asset representing the right to use the underlying asset during the same lease term. Further, this ASU provides clarification regarding the identification of certain components of contracts that would represent a lease as well as requires additional disclosures to the notes of the financial statements. Additionally, in January 2018, the FASB issued ASU No. 2018-01, "Leases (Topic 842): Land Easement Practical Expedient for Transition to Topic 842," to permit an entity to elect an optional practical expedient to not evaluate under Topic 842 land easements that exist or expired before the entity's adoption of Topic 842 and that were not previously accounted for as leases under existing accounting guidance. This guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, and is to be applied under a modified retrospective approach, including the option to apply certain practical expedients.

The FASB has continued to issue various updates to clarify and improve specific areas of ASU No. 2016-02. In July 2018, the FASB issued ASU No. 2018-10, “Codification Improvements to Topic 842, Leases,” to clarify the implementation guidance within ASU No. 2016-02 surrounding narrow aspects of Topic 842, including lessee reassessment of lease classifications, the rate implicit in a lease, lessor reassessment of lease terms and purchase options and variable lease payments that depend on an index or a rate. Also, in July 2018, the FASB issued ASU No. 2018-11, “Leases (Topic 842): Targeted Improvements,” to clarify the implementation guidance within ASU No. 2016-02 surrounding comparative period reporting requirements for initial adoption as well as separating lease and non-lease components in a contract and allocating consideration in the contract to the separate components. Like ASU No. 2016-02, this guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, and is to be applied under a modified retrospective approach.

The Company continues to evaluate the impact of adopting this new guidance on the consolidated financial statements. Excluding any impact from the clarification of contracts representing a lease, the Company expects to primarily recognize separate lease liabilities and right to use assets for the amounts related to certain facilities under operating lease agreements disclosed in Note 15 - Minimum Lease Commitments in the 2017 Form 10-K. Other leasing arrangements in which the Company expects to recognize separate lease liabilities and right to use assets include those related to the use of signage related to certain sponsorships and other agreements and certain automatic teller machines. The Company does not expect to significantly change operating lease agreements prior to adoption. The Company has established a committee consisting of individuals from various areas of the Company tasked with transitioning the Company to the new guidance requirements. The Company continues to review lease agreements related to certain assets as well as other agreements with components representing a lease across its various business units to determine the impact of adoption on the Company's consolidated financial statements. Additionally, the Company is reviewing methodologies for determining an appropriate discount rate for the measurement of separate lease liabilities and right of use assets. Current controls and processes are also being reviewed to determine any need for changes in response to the guidance.

Derivatives

In August 2017, the FASB issued ASU No. 2017-12, “Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities,” to improve the financial reporting of hedging relationships to better align the economic results of an entity’s risk management activities and disclosures within its financial statements. In addition, this ASU makes certain targeted improvements to simplify the application of the hedge accounting, including to derivative instruments as well as allow a one-time election to reclassify fixed-rate, prepayable debt securities from a held-to-maturity classification to an available-for-sale classification. This guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Guidance related to existing cash flow hedges and, if elected, fair value hedges is to be applied under a modified retrospective approach and guidance related to amended presentation and disclosures is to be applied under a prospective approach.

Early adoption is permitted as of the beginning of an annual period that has not been issued or made available for issuance. The Company elected to early adopt this guidance as of January 1, 2018. See Note 15 - Derivative Financial Instruments for further discussion of early adoption of this guidance. The impact of early adoption on the financial statements included the following:

• As allowed under the guidance, for certain existing derivative instruments designated as fair value hedges, the Company transitioned the measurement methodology for the related hedged item (loans) to be in accordance with the guidance without dedesignation of the hedging relationship. This resulted in a negative cumulative basis adjustment to loans of $116,000 with a corresponding adjustment to retained earnings.

• No fixed-rate, prepayable held-to-maturity securities were transferred to an available-for-sale classification.

• The entire change in the hedging instrument included in the assessment of hedge effectiveness of fair value hedges is presented in the same income statement line as the current impact of the effective portion of such hedge, or interest income

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and interest expense for interest rate hedging. The Company has previously recognized this ineffectiveness within non-interest income. For the first nine months of 2018, the Company recognized $55,000 of such change in interest income.

In October 2018, the FASB issued ASU No. 2018-16, “Derivatives and Hedging (Topic 815): Inclusion of the Secured Overnight Financing Rate (SOFR) Overnight Index Swap (OIS) Rate as a Benchmark Interest Rate for Hedge Accounting Purposes,” to permit the use of the OIS rate based on SOFR as a U.S. benchmark interest rate for hedge accounting purposes. This guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, and is to be applied prospectively for qualifying new or redesignated hedging relationships entered into on or after the date of adoption. Early adoption is permitted as the Company has early adopted ASU 2017-12 as discussed above.

Allowance for Credit Losses

In June 2016, the FASB issued ASU No. 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments,” to replace the current incurred loss methodology for recognizing credit losses, which delays recognition until it is probable a loss has been incurred, with a methodology that reflects an estimate of all expected credit losses and considers additional reasonable and supportable forecasted information when determining credit loss estimates. This impacts the calculation of an allowance for credit losses for all financial assets measured under the amortized cost basis, including held-to-maturity debt securities and PCI loans at the time of and subsequent to acquisition. Additionally, credit losses related to available-for-sale debt securities would be recorded through the allowance for credit losses and not as a direct adjustment to the amortized cost of the securities. This guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, and is to be applied under a modified retrospective approach.

The Company is currently evaluating the impact of adopting this new guidance on the consolidated financial statements as well as the impact on current systems and processes. Specifically, the Company has established a committee consisting of individuals from the various areas of the Company tasked with transitioning to the new requirements. At this time, the Company is finalizing potential accounting policy elections and potential modeling methodologies for estimating expected credit losses using reasonable and supportable forecast information. Additionally, the Company has identified certain historical data and system requirements and has selected platforms to build, store, execute and determine the financial impact. Current controls and processes are also being reviewed to determine any need for changes in response to the guidance.

Statement of Cash Flows

In August 2016, the FASB issued ASU No. 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (a consensus of the FASB Emerging Issues Task Force),” to clarify the presentation of specific types of cash flow receipts and payments, including the payment of debt prepayment or debt extinguishment costs, contingent consideration cash payments paid subsequent to the acquisition date and proceeds from settlement of BOLI policies. This guidance became effective as of January 1, 2018 and was applied under a retrospective approach resulting in additional disclosure, including cash payments made to settle contingent consideration liabilities recognized in prior business combinations.

In November 2016, the FASB issued ASU No. 2016-18 “Statement of Cash Flows (Topic 230): Restricted Cash (a consensus of the FASB Emerging Issues Task Force),” to clarify the classification and presentation of changes in restricted cash on the statement of cash flows. This guidance became effective as of January 1, 2018 and did not have a material impact on the Company.

Income Taxes

In October 2016, the FASB issued ASU No. 2016-16, “Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory,” to improve the accounting for intra-entity transfers of assets other than inventory. This ASU allows the recognition of current and deferred income taxes for such transfers prior to the subsequent sale of the transferred assets to an outside party. Initial recognition of current and deferred income taxes is currently prohibited for intra-entity transfers of assets other than inventory. This guidance became effective as of January 1, 2018 and did not have a material impact on the Company. 

The Tax Cuts and Jobs Act (the “Tax Act”) was enacted on December 22, 2017, and the Company recognized a provisional tax benefit of $7.6 million in 2017 to reflect the impact of the Tax Act, primarily reflecting estimated effects of a lower federal income tax rate on its net deferred tax liabilities and a transition tax due on the deferred earnings of the Company's Canadian subsidiary. Estimates were made in good faith and were subject to change as additional information and interpretive guidance regarding provisions of the Tax Act became available. Staff Accounting Bulletin 118 provides a measurement period, not to extend beyond one year from the date of enactment, during which a company may complete the accounting for the impacts of the Tax Act. During the three months ended September 30, 2018, the Company finalized the provisional amounts recorded for the year ended December 31, 2017 related to the Tax Cuts and Jobs Act and recorded an additional net tax benefit of $1.2 million.

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Business Combinations

In January 2017, the FASB issued ASU No. 2017-01, “Business Combinations (Topic 805): Clarifying the Definition of a Business,” to improve such definition and, as a result, assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or as business combinations. The definition of a business impacts many areas of accounting including acquisitions, disposals, goodwill and consolidation. This guidance became effective as of January 1, 2018 and was applied under a prospective approach. See Note 3 - Business Combinations for further discussion of business combinations including the acquisition of Chicago Shore Corporation ("CSC") as well as the acquisition of certain assets and assumption of certain liabilities of the mortgage banking business of iFreedom Direct Corporation DBA Veterans First Mortgage ("Veterans First") during the current period.

Goodwill

In January 2017, the FASB issued ASU No. 2017-04, “Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment,” to simplify the subsequent measurement of goodwill. When the carrying amount of a reporting unit exceeds its fair value, an entity would no longer be required to determine goodwill impairment by assigning the fair value of a reporting unit to all of its assets and liabilities as if that reporting unit was acquired in a business combination. Goodwill impairment would be recognized according to the excess of the carrying amount of the reporting unit over the calculated fair value of such unit. This guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, and is to be applied under a prospective approach. The Company does not expect this guidance to have a material impact on the Company's consolidated financial statements.

Compensation

In March 2017, the FASB issued ASU No. 2017-07, “Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost,” to improve the presentation of net periodic pension cost and net periodic post-retirement benefit cost. An entity will be required to report the service cost component of such costs in the same line item or items as other compensation costs related to services rendered. Additionally, only the service cost component will be eligible for capitalization when applicable. This guidance became effective as of January 1, 2018 and was applied under a retrospective approach related to presentation of the service cost component and a prospective approach related to capitalization of such costs. Adoption of this guidance did not have a material impact on the Company's consolidated financial statements.

In May 2017, the FASB issued ASU No. 2017-09, “Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting,” to clarify when modification accounting is appropriate for changes to the terms and conditions of a share-based payment award. An entity will be required to account for such changes as a modification unless certain criteria is met. This guidance became effective as of January 1, 2018 and was applied under a prospective approach for awards modified on or after the adoption date. Adoption of this guidance did not have a material impact on the Company's consolidated financial statements.

Amortization of Premium on Certain Debt Securities

In March 2017, the FASB issued ASU No. 2017-08, “Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities,” to amend the amortization period for certain purchased callable debt securities held at a premium. The amortization period for such securities will be shortened to the earliest call date. This guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, and is to be applied under a modified retrospective approach. Early adoption is permitted as of the beginning of an annual period that has not been issued or made available for issuance. The Company did not early adopt this guidance as of January 1, 2018. The Company is currently evaluating the impact of adopting this new guidance on the consolidated financial statements.

Accumulated Other Comprehensive Income (Loss)

In February 2018, the FASB issued ASU No. 2018-02, “Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income,” to allow a reclassification from accumulated other comprehensive income to retained earnings related to the stranded tax effects within other comprehensive income resulting from the Federal income tax rate reduction in the Tax Act. This guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, and is to be applied either in the period of adoption or retrospectively to each period or periods in which the effect of the Tax Act is recognized.

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Early adoption is permitted as of the beginning of an annual period that has not been issued or made available for issuance. The Company elected to early adopt this guidance as of January 1, 2018 and applied such reclassification in the current period (period of adoption). As of January 1, 2018, the Company reclassified a stranded credit of $3.0 million from accumulated other comprehensive income to retained earnings. The Company has a policy for releasing the income tax effects from accumulated other comprehensive income using an individual security approach.

Fair Value Measurement

In August 2018, the FASB issued ASU No. 2018-13, “Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirement for Fair Value Measurement,” to modify disclosure requirements on fair value measurements and inputs. This guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, and is to be applied prospectively or retrospectively depending upon the disclosure requirement. Early adoption is permitted.

Intangibles

In August 2018, the FASB issued ASU No. 2018-15, “Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract,” to align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with similar requirements related to implementation costs incurred to develop or obtain internal-use software. In addition, the amendment requires any capitalized implementation costs related to a hosting arrangement to be expensed over the term of the hosting arrangement. This guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, and is to be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. Early adoption is permitted, including adoption in any interim period. The Company is currently evaluating the impact of adopting this new guidance on the consolidated financial statements.

(3) Business Combinations

Non FDIC-Assisted Bank Acquisitions

On August 1, 2018, the Company acquired CSC. CSC was the parent company of Delaware Place Bank. Through this transaction, the Company acquired Delaware Place Bank’s one banking location in Chicago, Illinois. Delaware Place Bank was merged into the Company's wholly-owned subsidiary Wintrust Bank. The Company acquired assets with a fair value of approximately $282.2 million, including approximately $151.0 million of loans, and assumed deposits with a fair value of approximately $213.1 million. Additionally, the Company recorded goodwill of $27.2 million on the acquisition.

FDIC-Assisted Transactions

From 2010 to 2012, the Company acquired the banking operations, including the acquisition of certain assets and the assumption of liabilities, of nine financial institutions in FDIC-assisted transactions. Loans comprised the majority of the assets acquired in nearly all of these FDIC-assisted transactions, of which eight such transactions were subject to loss sharing agreements with the FDIC whereby the FDIC agreed to reimburse the Company for 80% of losses incurred on the purchased loans, other real estate owned (“OREO”), and certain other assets. Additionally, clawback provisions within these loss share agreements with the FDIC required the Company to reimburse the FDIC for actual losses on covered assets that were lower than the original loss estimates agreed upon with the FDIC with respect of such assets in the loss share agreements. The Company refers to the loans subject to these loss sharing agreements as “covered loans” and uses the term “covered assets” to refer to covered loans, covered OREO and certain other covered assets during periods subject to such agreements.

As of dates subject to such agreements, the loans covered by the loss share agreements were classified and presented as covered loans and the estimated reimbursable losses were recorded as an FDIC indemnification asset or liability in the Consolidated Statements of Condition. The Company recorded the acquired assets and liabilities at their estimated fair values at the acquisition date. The fair value for loans reflected expected credit losses at the acquisition date. Therefore, the Company only recognized a provision for credit losses and charge-offs on the acquired loans for any further credit deterioration subsequent to the acquisition date. See Note 7 — Allowance for Loan Losses, Allowance for Losses on Lending-Related Commitments and Impaired Loans for further discussion of the allowance on covered loans.

The loss share agreements with the FDIC covered realized losses on loans, foreclosed real estate and certain other assets and required the Company to record loss share assets and liabilities that were measured separately from the loan portfolios because they were not contractually embedded in the loans and were not transferable with the loans had the Company chosen to dispose of them. Fair values at the acquisition dates were estimated based on projected cash flows available for loss share based on the

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credit adjustments estimated for each loan pool and the loss share percentages. The loss share assets and liabilities were recorded as FDIC indemnification assets and other liabilities, respectively, on the Consolidated Statements of Condition as of dates covered by loss share agreements. Subsequent to the acquisition date, reimbursements received from the FDIC for actual incurred losses reduced the FDIC indemnification assets. Reductions to expected losses, to the extent such reductions to expected losses were the result of an improvement to the actual or expected cash flows from the covered assets, also reduced the FDIC indemnification assets and, if necessary, increased any loss share liability when necessary reductions exceeded the current value of the FDIC indemnification assets. In accordance with the clawback provision noted above, the Company was required to reimburse the FDIC when actual losses were less than certain thresholds established for each loss share agreement. The balance of these estimated reimbursements in accordance with clawback provisions and any related amortization were adjusted periodically for changes in the expected losses on covered assets. On the Consolidated Statements of Condition as of dates subject to loss share agreements, estimated reimbursements from clawback provisions were recorded as a reduction to the FDIC indemnification asset or, if necessary, an increase to the loss share liability, which was included within accrued interest payable and other liabilities. In the second quarter of 2017, the Company recorded a $4.9 million reduction to the estimated loss share liability as a result of an adjustment related to such clawback provisions. Although these assets were contractual receivables from the FDIC and these liabilities were contractual payables to the FDIC, there were no contractual interest rates. Additional expected losses, to the extent such expected losses resulted in recognition of an allowance for covered loan losses, increased the FDIC indemnification asset or reduced the FDIC indemnification liability. The corresponding amortization was recorded as a component of non-interest income on the Consolidated Statements of Income during periods covered by loss share agreements.

The following table summarizes the activity in the Company’s FDIC indemnification liability during the periods covered by loss share agreements indicated below:

	Three Months Ended			Nine Months Ended
(Dollars in thousands)	September 30, 2017			September 30, 2017
Balance at beginning of period	$	15,375		$	16,701
Reductions from reimbursable expenses	(159		)	(316		)
Amortization	311			1,010
Changes in expected reimbursements to the FDIC for changes in expected credit losses and reimbursable expenses	994			(1,665		)
Payments received from the FDIC	(1,049		)	(258		)
Balance at end of period	$	15,472		$	15,472

On October 16, 2017, the Company entered into agreements with the FDIC that terminated all existing loss share agreements with the FDIC. Under the terms of the agreements, the Company made a net payment of $15.2 million to the FDIC as consideration for the early termination of the loss share agreements. The Company recorded a pre-tax gain of approximately $0.4 million in the fourth quarter of 2017 to write off the remaining loss share asset, relieve the claw-back liability and recognize the payment to the FDIC.

Mortgage Banking Acquisitions

On January 4, 2018, the Company acquired Veterans First with assets including mortgage-servicing-rights on approximately 10,000 loans, totaling an estimated $1.6 billion in unpaid principal balance. The Company recorded goodwill of $9.1 million on the acquisition.

On February 14, 2017, the Company acquired certain assets and assumed certain liabilities of the mortgage banking business of American Homestead Mortgage, LLC ("AHM") in a business combination. The Company recorded goodwill of $999,000 on the acquisition.

Purchased Credit Impaired ("PCI") Loans

Purchased loans acquired in a business combination are recorded at estimated fair value on their purchase date. For PCI loans, expected future cash flows at the purchase date in excess of the fair value of loans are recorded as interest income over the life of the loans if the timing and amount of the future cash flows is reasonably estimable (“accretable yield”). The difference between contractually required payments and the cash flows expected to be collected at acquisition is referred to as the non-accretable difference and represents probable losses in the portfolio.

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In determining the acquisition date fair value of PCI loans, and in subsequent accounting, the Company aggregates these purchased loans into pools of loans by common risk characteristics, such as credit risk rating and loan type. Subsequent to the purchase date, increases in cash flows over those expected at the purchase date are recognized as interest income prospectively. Subsequent decreases to the expected cash flows will result in a provision for loan losses.

The Company purchased a portfolio of life insurance premium finance receivables in 2009. These purchased life insurance premium finance receivables are valued on an individual basis. If credit related conditions deteriorate, an allowance related to these loans will be established as part of the provision for credit losses.

See Note 6—Loans, for additional information on PCI loans.

(4) Cash and Cash Equivalents

For purposes of the Consolidated Statements of Cash Flows, the Company considers cash and cash equivalents to include cash on hand, cash items in the process of collection, non-interest bearing amounts due from correspondent banks, federal funds sold and securities purchased under resale agreements with original maturities of three months or less. These items are included within the Company’s Consolidated Statements of Condition as cash and due from banks, and federal funds sold and securities purchased under resale agreements.

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(5) Investment Securities

The following tables are a summary of the investment securities portfolios as of the dates shown:

	September 30, 2018
(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available-for-sale securities
U.S. Treasury	$	125,153	$	—	$	(392	)	$	124,761
U.S. Government agencies	111,997		8		(985		)	111,020
Municipal	133,006		1,481		(1,114		)	133,373
Corporate notes:
Financial issuers	97,085		87		(4,719		)	92,453
Other	1,000		—		—			1,000
Mortgage-backed: (1)
Mortgage-backed securities	1,744,600		121		(87,950		)	1,656,771
Collateralized mortgage obligations	47,909		4		(2,306		)	45,607
Equity securities (2)	—		—		—			—
Total available-for-sale securities	$	2,260,750	$	1,701	$	(97,466	)	$	2,164,985
Held-to-maturity securities
U.S. Government agencies	$	713,423	$	—	$	(47,706	)	$	665,717
Municipal	253,015		629		(7,764		)	245,880
Total held-to-maturity securities	$	966,438	$	629	$	(55,470	)	$	911,597
Equity securities with readily determinable fair value (2)	$	33,512	$	4,206	$	(1,304	)	$	36,414

	December 31, 2017
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
(Dollars in thousands)
Available-for-sale securities
U.S. Treasury	$	144,904	$	—	$	(1,082	)	$	143,822
U.S. Government agencies	157,638		2		(725		)	156,915
Municipal	113,197		2,712		(557		)	115,352
Corporate notes:
Financial issuers	30,309		43		(301		)	30,051
Other	1,000		—		(1		)	999
Mortgage-backed: (1)
Mortgage-backed securities	1,291,695		446		(31,955		)	1,260,186
Collateralized mortgage obligations	60,092		64		(617		)	59,539
Equity securities (2)	34,234		3,357		(789		)	36,802
Total available-for-sale securities	$	1,833,069	$	6,624	$	(36,027	)	$	1,803,666
Held-to-maturity securities
U.S. Government agencies	$	579,062	$	23	$	(14,066	)	$	565,019
Municipal	247,387		2,668		(2,558		)	247,497
Total held-to-maturity securities	$	826,449	$	2,691	$	(16,624	)	$	812,516

(1) Consisting entirely of residential mortgage-backed securities, none of which are subprime.

(2) As a result of the adoption of ASU No. 2016-01 effective January 1, 2018, equity securities with readily determinable fair value are no longer presented within available-for-sale securities and are now presented as equity securities with readily determinable fair values in the Company's Consolidated Statements of Condition for the current period.

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	September 30, 2017
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
(Dollars in thousands)
Available-for-sale securities
U.S. Treasury	$	144,872	$	—	$	(727	)	$	144,145
U.S. Government agencies	159,884		10		(566		)	159,328
Municipal	113,796		2,493		(273		)	116,016
Corporate notes:
Financial issuers	60,325		63		(771		)	59,617
Other	1,000		—		(3		)	997
Mortgage-backed: (1)
Mortgage-backed securities	1,114,655		1,477		(30,436		)	1,085,696
Collateralized mortgage obligations	63,934		230		(412		)	63,752
Equity securities (2)	33,166		3,867		(681		)	36,352
Total available-for-sale securities	$	1,691,632	$	8,140	$	(33,869	)	$	1,665,903
Held-to-maturity securities
U.S. Government agencies	$	585,061	$	249	$	(12,579	)	$	572,731
Municipal	234,279		2,185		(2,159		)	234,305
Total held-to-maturity securities	$	819,340	$	2,434	$	(14,738	)	$	807,036

(1) Consisting entirely of residential mortgage-backed securities, none of which are subprime.

(2) As a result of the adoption of ASU No. 2016-01 effective January 1, 2018, equity securities with readily determinable fair value are no longer presented within available-for-sale securities and are now presented as equity securities with readily determinable fair values in the Company's Consolidated Statements of Condition for the current period.

Equity securities without readily determinable fair values totaled $26.6 million as of September 30, 2018. Equity securities without readily determinable fair values are included as part of accrued interest receivable and other assets in the Company's Consolidated Statements of Condition. The Company recorded no upward adjustments on such securities in the third quarter of 2018 and $156,000 on a year-to-date basis, related to observable price changes in orderly transactions for the identical or a similar investment of the same issuer in accordance with the adoption of ASU No. 2016-01. No downward adjustments of equity securities without readily determinable fair values related to observable price changes in orderly transactions for the identical or a similar investment of the same issuer were recorded during the current periods. The Company monitors its equity investments without a readily determinable fair values to identify potential transactions that may indicate an observable price change requiring adjustment to its carrying amount.

15

The following table presents the portion of the Company’s available-for-sale and held-to-maturity investment securities portfolios which has gross unrealized losses, reflecting the length of time that individual securities have been in a continuous unrealized loss position at September 30, 2018:

	Continuous unrealized losses existing for less than 12 months					Continuous unrealized losses existing for greater than 12 months					Total
(Dollars in thousands)	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Available-for-sale securities
U.S. Treasury	$	100,008	$	(131	)	$	24,753	$	(261	)	$	124,761	$	(392	)
U.S. Government agencies	37,672		(914		)	70,032		(71		)	107,704		(985		)
Municipal	38,774		(553		)	20,489		(561		)	59,263		(1,114		)
Corporate notes:
Financial issuers	68,639		(4,475		)	3,730		(244		)	72,369		(4,719		)
Other	—		—			—		—			—		—
Mortgage-backed:
Mortgage-backed securities	573,401		(14,706		)	1,079,068		(73,244		)	1,652,469		(87,950		)
Collateralized mortgage obligations	22,524		(1,228		)	22,671		(1,078		)	45,195		(2,306		)
Total available-for-sale securities	$	841,018	$	(22,007	)	$	1,220,743	$	(75,459	)	$	2,061,761	$	(97,466	)
Held-to-maturity securities
U.S. Government agencies	$	298,736	$	(12,317	)	$	366,981	$	(35,389	)	$	665,717	$	(47,706	)
Municipal	146,750		(3,854		)	83,874		(3,910		)	230,624		(7,764		)
Total held-to-maturity securities	$	445,486	$	(16,171	)	$	450,855	$	(39,299	)	$	896,341	$	(55,470	)

The Company conducts a regular assessment of its available-for-sale and held-to-maturity investment securities to determine whether securities are other-than-temporarily impaired considering, among other factors, the nature of the securities, credit ratings or financial condition of the issuer, the extent and duration of the unrealized loss, expected cash flows, market conditions and the Company’s ability to hold the securities through the anticipated recovery period.

The Company does not consider available-for-sale and held-to-maturity securities with unrealized losses at September 30, 2018 to be other-than-temporarily impaired. The Company does not intend to sell these investments and it is more likely than not that the Company will not be required to sell these investments before recovery of the amortized cost bases, which may be the maturity dates of the securities. The unrealized losses within each category have occurred as a result of changes in interest rates, market spreads and market conditions subsequent to purchase. Securities with continuous unrealized losses existing for more than twelve months were primarily mortgage-backed securities and corporate notes.

16

The following table provides information as to the amount of gross gains and losses, adjustments and impairment on investment securities and proceeds received through the sale or call of investment securities:

	Three months ended September 30,						Nine months ended September 30,
(Dollars in thousands)	2018			2017			2018			2017
Realized gains on investment securities	$	1,051		$	58		$	1,057		$	106
Realized losses on investment securities	(50		)	(19		)	(1,051		)	(75		)
Net realized gains on investment securities	1,001			$	39		6			$	31
Unrealized gains on equity securities with readily determinable fair value	530			—			2,632			—
Unrealized losses on equity securities with readily determinable fair value	(1,111		)	—			(2,176		)	—
Net unrealized (losses) gains on equity securities with readily determinable fair value	(581		)	—			456			—
Upward adjustments of equity securities without readily determinable fair values	—			—			156			—
Downward adjustments of equity securities without readily determinable fair values	—			—			—			—
Impairment of equity securities without readily determinable fair values	(330		)	—			(867		)	—
Adjustment and impairment, net, of equity securities without readily determinable fair values	(330		)	—			(711		)	—
Other than temporary impairment charges	—			—			—			—
Gains (losses) on investment securities, net	$	90		$	39		$	(249	)	$	31
Proceeds from sales of available-for-sale securities	$	649		$	133,089		$	209,640		$	121,795
Proceeds from sales of equity securities with readily determinable fair value	1,895			—			1,895			—
Proceeds from sales and capital distributions of equity securities without readily determinable fair value	64			—			680			—

During the three months ended September 30, 2018, the Company recorded $330,000 of impairment of equity securities without readily determinable fair values. On a year-to-date basis, the Company recorded impairment of equity securities without readily determinable fair values totaling $867,000. The Company conducts a quarterly assessment of its equity securities without a readily determinable fair values to determine whether impairment exists in such securities, considering, among other factors, the nature of the securities, financial condition of the issuer and expected future cash flows.

17

The amortized cost and fair value of available-for-sale and held-to-maturity investment securities as of September 30, 2018, December 31, 2017 and September 30, 2017, by contractual maturity, are shown in the following table. Contractual maturities may differ from actual maturities as borrowers may have the right to call or repay obligations with or without call or prepayment penalties. Mortgage-backed securities are not included in the maturity categories in the following maturity summary as actual maturities may differ from contractual maturities because the underlying mortgages may be called or prepaid without penalties:

	September 30, 2018				December 31, 2017				September 30, 2017
(Dollars in thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value		Amortized Cost		Fair Value
Available-for-sale securities
Due in one year or less	$	128,184	$	127,844	$	300,833	$	299,285	$	150,907	$	150,241
Due in one to five years	174,968		174,877		97,019		97,326		282,443		282,121
Due in five to ten years	118,229		113,875		33,947		35,029		38,339		39,458
Due after ten years	46,860		46,011		15,249		15,499		8,188		8,283
Mortgage-backed	1,792,509		1,702,378		1,351,787		1,319,725		1,178,589		1,149,448
Equity securities (1)	—		—		34,234		36,802		33,166		36,352
Total available-for-sale securities	$	2,260,750	$	2,164,985	$	1,833,069	$	1,803,666	$	1,691,632	$	1,665,903
Held-to-maturity securities
Due in one year or less	$	5,521	$	5,511	$	170	$	171	$	170	$	171
Due in one to five years	31,782		31,160		38,392		38,012		36,914		36,734
Due in five to ten years	255,146		243,608		205,227		203,680		193,387		192,581
Due after ten years	673,989		631,318		582,660		570,653		588,869		577,550
Total held-to-maturity securities	$	966,438	$	911,597	$	826,449	$	812,516	$	819,340	$	807,036

(1) As a result of the adoption of ASU No. 2016-01 effective January 1, 2018, equity securities with readily determinable fair value are no longer presented within available-for-sale securities and are now presented as equity securities with readily determinable fair values in the Company's Consolidated Statements of Condition for the current period.

Securities having a fair value of $1.7 billion at September 30, 2018 as well as securities having a fair value of $1.7 billion and $1.6 billion at December 31, 2017 and September 30, 2017, respectively, were pledged as collateral for public deposits, trust deposits, Federal Home Loan Bank ("FHLB") advances, securities sold under repurchase agreements and derivatives. At September 30, 2018, there were no securities of a single issuer, other than U.S. Government-sponsored agency securities, which exceeded 10% of shareholders’ equity.

18

(6) Loans

The following table shows the Company’s loan portfolio by category as of the dates shown:

	September 30,			December 31,			September 30,
(Dollars in thousands)	2018			2017			2017
Balance:
Commercial	$	7,473,958		$	6,787,677		$	6,456,034
Commercial real estate	6,746,774			6,580,618			6,400,781
Home equity	578,844			663,045			672,969
Residential real estate	924,250			832,120			789,499
Premium finance receivables—commercial	2,885,327			2,634,565			2,664,912
Premium finance receivables—life insurance	4,398,971			4,035,059			3,795,474
Consumer and other	115,827			107,713			133,112
Total loans, net of unearned income, excluding covered loans	$	23,123,951		$	21,640,797		$	20,912,781
Covered loans	—			—			46,601
Total loans	$	23,123,951		$	21,640,797		$	20,959,382
Mix:
Commercial	32		%	31		%	31		%
Commercial real estate	29			30			31
Home equity	3			3			3
Residential real estate	4			4			3
Premium finance receivables—commercial	12			12			13
Premium finance receivables—life insurance	19			19			18
Consumer and other	1			1			1
Total loans, net of unearned income, excluding covered loans	100		%	100		%	100		%
Covered loans	—			—			—
Total loans	100		%	100		%	100		%

The Company’s loan portfolio is generally comprised of loans to consumers and small to medium-sized businesses located within the geographic market areas that the banks serve. The premium finance receivables portfolios are made to customers throughout the United States and Canada. The Company strives to maintain a loan portfolio that is diverse in terms of loan type, industry, borrower and geographic concentrations. Such diversification reduces the exposure to economic downturns that may occur in different segments of the economy or in different industries.

Certain premium finance receivables are recorded net of unearned income. The unearned income portions of such premium finance receivables were $98.1 million at September 30, 2018, $87.0 million at December 31, 2017 and $80.4 million at September 30, 2017.

Total loans, excluding PCI loans, include net deferred loan fees and costs and fair value purchase accounting adjustments totaling $6.5 million at September 30, 2018, $9.3 million at December 31, 2017 and $8.0 million at September 30, 2017. PCI loans are recorded net of credit discounts. See “Acquired Loan Information at Acquisition - PCI Loans” below.

It is the policy of the Company to review each prospective credit in order to determine the appropriateness and, when required, the adequacy of security or collateral necessary to obtain when making a loan. The type of collateral, when required, will vary from liquid assets to real estate. The Company seeks to ensure access to collateral, in the event of default, through adherence to state lending laws and the Company’s credit monitoring procedures.

19

Acquired Loan Information at Acquisition—PCI Loans

As part of the Company's previous acquisitions, the Company acquired loans for which there was evidence of credit quality deterioration since origination (PCI loans) and determined that it was probable that the Company would be unable to collect all contractually required principal and interest payments. The following table presents the unpaid principal balance and carrying value for these acquired loans:

	September 30, 2018				December 31, 2017
(Dollars in thousands)	Unpaid Principal Balance		Carrying Value		Unpaid Principal Balance		Carrying Value
PCI loans	$	325,019	$	304,726	$	375,237	$	350,690

See Note 7—Allowance for Loan Losses, Allowance for Losses on Lending-Related Commitments and Impaired Loans for further discussion regarding the allowance for loan losses associated with PCI loans at September 30, 2018.

The following table provides estimated details as of the date of acquisition on loans acquired in 2018 with evidence of credit quality deterioration since origination:

(Dollars in thousands)	Delaware Place Bank
Contractually required payments including interest	$	13,367
Less: Nonaccretable difference	1,197
Cash flows expected to be collected (1)	$	12,170
Less: Accretable yield	2,321
Fair value of PCI loans acquired	$	9,849

(1) Represents undiscounted expected principal and interest cash at acquisition.

Accretable Yield Activity - PCI Loans

Changes in expected cash flows may vary from period to period as the Company periodically updates its cash flow model assumptions for PCI loans. The factors that most significantly affect the estimates of gross cash flows expected to be collected, and accordingly the accretable yield, include changes in the benchmark interest rate indices for variable-rate products and changes in prepayment assumptions and loss estimates. The following table provides activity for the accretable yield of PCI loans:

	Three Months Ended						Nine Months Ended
(Dollars in thousands)	September 30, 2018			September 30, 2017			September 30, 2018			September 30, 2017
Accretable yield, beginning balance	$	34,347		$	45,510		$	36,565		$	49,408
Acquisitions	2,321			—			2,321			426
Accretable yield amortized to interest income	(4,144		)	(5,025		)	(12,915		)	(16,101		)
Accretable yield amortized to indemnification asset/liability (1)	—			(371		)	—			(1,086		)
Reclassification from non-accretable difference (2)	1,734			1,017			4,596			7,106
Increases in interest cash flows due to payments and changes in interest rates	(1,093		)	(875		)	2,598			503
Accretable yield, ending balance	$	33,165		$	40,256		$	33,165		$	40,256

(1) Represents the portion of the current period accreted yield, resulting from lower expected losses, applied to reduce the loss share indemnification asset or increase the loss share indemnification liability.

(2) Reclassification is the result of subsequent increases in expected principal cash flows.

Accretion to interest income accounted for under ASC 310-30 totaled $4.1 million and $5.0 million in the third quarter of 2018 and 2017, respectively. For the nine months ended September 30, 2018 and 2017, the Company recorded accretion to interest income of $12.9 million and $16.1 million, respectively. These amounts are included within interest and fees on loans in the Consolidated Statements of Income.

20

(7) Allowance for Loan Losses, Allowance for Losses on Lending-Related Commitments and Impaired Loans

The tables below show the aging of the Company’s loan portfolio at September 30, 2018, December 31, 2017 and September 30, 2017:

As of September 30, 2018			90+ days and still accruing		60-89 days past due		30-59 days past due
(Dollars in thousands)	Nonaccrual								Current		Total Loans
Loan Balances:
Commercial
Commercial, industrial and other	$	41,322	$	—	$	2,535	$	16,451	$	4,745,178	$	4,805,486
Franchise	16,351		5,122		—		—		915,817		937,290
Mortgage warehouse lines of credit	—		—		3,000		—		168,860		171,860
Asset-based lending	910		—		590		9,083		1,023,268		1,033,851
Leases	4		—		—		80		509,591		509,675
PCI - commercial (1)	—		3,372		15		—		12,409		15,796
Total commercial	58,587		8,494		6,140		25,614		7,375,123		7,473,958
Commercial real estate:
Construction	1,554		—		1,823		16,228		778,725		798,330
Land	228		—		365		—		118,411		119,004
Office	1,532		—		4,058		3,021		932,166		940,777
Industrial	178		—		122		145		885,486		885,931
Retail	10,586		—		4,570		10,645		861,901		887,702
Multi-family	318		—		—		1,162		922,413		923,893
Mixed use and other	3,119		—		9,654		11,503		2,062,179		2,086,455
PCI - commercial real estate (1)	—		5,578		6,448		1,380		91,276		104,682
Total commercial real estate	17,515		5,578		27,040		44,084		6,652,557		6,746,774
Home equity	8,523		—		1,075		3,478		565,768		578,844
Residential real estate, including PCI	16,062		1,865		1,714		603		904,006		924,250
Premium finance receivables
Commercial insurance loans	13,802		7,028		5,945		13,239		2,845,313		2,885,327
Life insurance loans	—		—		—		22,016		4,203,465		4,225,481
PCI - life insurance loans (1)	—		—		—		—		173,490		173,490
Consumer and other, including PCI	355		295		430		329		114,418		115,827
Total loans, net of unearned income	$	114,844	$	23,260	$	42,344	$	109,363	$	22,834,140	$	23,123,951

As of December 31, 2017			90+ days and still accruing		60-89 days past due		30-59 days past due
(Dollars in thousands)	Nonaccrual								Current		Total Loans
Loan Balances:
Commercial
Commercial, industrial and other	$	11,260	$	—	$	3,746	$	13,392	$	4,314,107	$	4,342,505
Franchise	2,447		—		—		—		845,150		847,597
Mortgage warehouse lines of credit	—		—		—		4,000		190,523		194,523
Asset-based lending	1,550		—		283		10,057		968,576		980,466
Leases	439		—		3		1,958		410,772		413,172
PCI - commercial (1)	—		877		186		—		8,351		9,414
Total commercial	15,696		877		4,218		29,407		6,737,479		6,787,677
Commercial real estate
Construction	3,143		—		—		200		742,171		745,514
Land	188		—		—		5,156		121,140		126,484
Office	2,438		—		—		4,458		887,937		894,833
Industrial	811		—		—		2,412		879,796		883,019
Retail	12,328		—		668		148		938,383		951,527
Multi-family	—		—		—		1,034		914,610		915,644
Mixed use and other	3,140		—		1,423		9,641		1,921,501		1,935,705
PCI - commercial real estate (1)	—		7,135		2,255		6,277		112,225		127,892
Total commercial real estate	22,048		7,135		4,346		29,326		6,517,763		6,580,618
Home equity	8,978		—		518		4,634		648,915		663,045
Residential real estate, including PCI	17,977		5,304		1,303		8,378		799,158		832,120
Premium finance receivables
Commercial insurance loans	12,163		9,242		17,796		15,849		2,579,515		2,634,565
Life insurance loans	—		—		4,837		10,017		3,820,936		3,835,790
PCI - life insurance loans (1)	—		—		—		—		199,269		199,269
Consumer and other, including PCI	740		101		242		727		105,903		107,713
Total loans, net of unearned income	$	77,602	$	22,659	$	33,260	$	98,338	$	21,408,938	$	21,640,797

(1) PCI loans represent loans acquired with evidence of credit quality deterioration since origination, in accordance with ASC 310-30.Loan agings are based upon contractually required payments.

21

As of September 30, 2017			90+ days and still accruing		60-89 days past due		30-59 days past due
(Dollars in thousands)	Nonaccrual								Current		Total Loans
Loan Balances:
Commercial
Commercial, industrial and other	$	12,281	$	—	$	3,161	$	13,710	$	4,091,381	$	4,120,533
Franchise	—		—		—		16,719		836,997		853,716
Mortgage warehouse lines of credit	—		—		—		312		194,058		194,370
Asset-based lending	1,141		—		1,533		4,515		889,147		896,336
Leases	509		—		281		1,194		379,410		381,394
PCI - commercial (1)	—		1,489		61		—		8,135		9,685
Total commercial	13,931		1,489		5,036		36,450		6,399,128		6,456,034
Commercial real estate:
Construction	1,607		—		366		2,064		669,940		673,977
Land	196		—		—		—		102,557		102,753
Office	5,148		—		—		1,220		874,583		880,951
Industrial	1,848		—		137		438		834,062		836,485
Retail	2,200		—		3,030		3,674		925,335		934,239
Multi-family	569		—		68		3,058		861,290		864,985
Mixed use and other	3,310		—		843		3,561		1,966,601		1,974,315
PCI - commercial real estate (1)	—		8,443		1,394		2,940		120,299		133,076
Total commercial real estate	14,878		8,443		5,838		16,955		6,354,667		6,400,781
Home equity	7,581		—		446		2,590		662,352		672,969
Residential real estate, including PCI	14,743		1,120		2,055		165		771,416		789,499
Premium finance receivables
Commercial insurance loans	9,827		9,584		7,421		9,966		2,628,114		2,664,912
Life insurance loans	—		6,740		946		6,937		3,571,388		3,586,011
PCI - life insurance loans (1)	—		—		—		—		209,463		209,463
Consumer and other, including PCI	540		221		242		685		131,424		133,112
Total loans, net of unearned income, excluding covered loans	$	61,500	$	27,597	$	21,984	$	73,748	$	20,727,952	$	20,912,781
Covered loans	1,936		2,233		1,074		45		41,313		46,601
Total loans, net of unearned income	$	63,436	$	29,830	$	23,058	$	73,793	$	20,769,265	$	20,959,382

(1) PCI loans represent loans acquired with evidence of credit quality deterioration since origination, in accordance with ASC 310-30.Loan agings are based upon contractually required payments.

The Company's ability to manage credit risk depends in large part on our ability to properly identify and manage problem loans. To do so, the Company operates a credit risk rating system under which our credit management personnel assign a credit risk rating (1 to 10 rating) to each loan at the time of origination and review loans on a regular basis.

Each loan officer is responsible for monitoring his or her loan portfolio, recommending a credit risk rating for each loan in his or her portfolio and ensuring the credit risk ratings are appropriate. These credit risk ratings are then ratified by the bank’s chief credit officer and/or concurrence credit officer. Credit risk ratings are determined by evaluating a number of factors including: a borrower’s financial strength, cash flow coverage, collateral protection and guarantees.

The Company’s Problem Loan Reporting system automatically includes all loans with credit risk ratings of 6 through 9. This system is designed to provide an on-going detailed tracking mechanism for each problem loan. Once management determines that a loan has deteriorated to a point where it has a credit risk rating of 6 or worse, the Company’s Managed Asset Division performs an overall credit and collateral review. As part of this review, all underlying collateral is identified and the valuation methodology is analyzed and tracked. As a result of this initial review by the Company’s Managed Asset Division, the credit risk rating is reviewed and a portion of the outstanding loan balance may be deemed uncollectible or an impairment reserve may be established. The Company’s impairment analysis utilizes an independent re-appraisal of the collateral (unless such a third-party evaluation is not possible due to the unique nature of the collateral, such as a closely-held business or thinly traded securities). In the case of commercial real estate collateral, an independent third party appraisal is ordered by the Company’s Real Estate Services Group to determine if there has been any change in the underlying collateral value. These independent appraisals are reviewed by the Real Estate Services Group and sometimes by independent third party valuation experts and may be adjusted depending upon market conditions.

Through the credit risk rating process, loans are reviewed to determine if they are performing in accordance with the original contractual terms. If the borrower has failed to comply with the original contractual terms, further action may be required by the Company, including a downgrade in the credit risk rating, movement to non-accrual status, a charge-off or the establishment of a specific impairment reserve. If a loan amount, or portion thereof, is determined to be uncollectible, the loan’s credit risk rating is immediately downgraded to an 8 or 9 and the uncollectible amount is charged-off. Any loan that has a partial charge-off continues to be assigned a credit risk rating of an 8 or 9 for the duration of time that a balance remains outstanding. The Company undertakes a thorough and ongoing analysis to determine if additional impairment and/or charge-offs are appropriate and to begin a workout plan for the credit to minimize actual losses.

22

If, based on current information and events, it is probable that the Company will be unable to collect all amounts due to it according to the contractual terms of the loan agreement, a specific impairment reserve is established. In determining the appropriate charge-off for collateral-dependent loans, the Company considers the results of appraisals for the associated collateral.

Non-performing loans include all non-accrual loans (8 and 9 risk ratings) as well as loans 90 days past due and still accruing interest, excluding PCI and covered loans. The remainder of the portfolio is considered performing under the contractual terms of the loan agreement. The following table presents the recorded investment based on performance of loans by class, excluding covered loans, per the most recent analysis at September 30, 2018, December 31, 2017 and September 30, 2017:

	Performing						Non-performing						Total
(Dollars in thousands)	September 30, 2018		December 31, 2017		September 30, 2017		September 30, 2018		December 31, 2017		September 30, 2017		September 30, 2018		December 31, 2017		September 30, 2017
Loan Balances:
Commercial
Commercial, industrial and other	$	4,764,164	$	4,331,245	$	4,108,252	$	41,322	$	11,260	$	12,281	$	4,805,486	$	4,342,505	$	4,120,533
Franchise	915,817		845,150		853,716		21,473		2,447		—		937,290		847,597		853,716
Mortgage warehouse lines of credit	171,860		194,523		194,370		—		—		—		171,860		194,523		194,370
Asset-based lending	1,032,941		978,916		895,195		910		1,550		1,141		1,033,851		980,466		896,336
Leases	509,671		412,733		380,885		4		439		509		509,675		413,172		381,394
PCI - commercial (1)	15,796		9,414		9,685		—		—		—		15,796		9,414		9,685
Total commercial	7,410,249		6,771,981		6,442,103		63,709		15,696		13,931		7,473,958		6,787,677		6,456,034
Commercial real estate
Construction	796,776		742,371		672,370		1,554		3,143		1,607		798,330		745,514		673,977
Land	118,776		126,296		102,557		228		188		196		119,004		126,484		102,753
Office	939,245		892,395		875,803		1,532		2,438		5,148		940,777		894,833		880,951
Industrial	885,753		882,208		834,637		178		811		1,848		885,931		883,019		836,485
Retail	877,116		939,199		932,039		10,586		12,328		2,200		887,702		951,527		934,239
Multi-family	923,575		915,644		864,416		318		—		569		923,893		915,644		864,985
Mixed use and other	2,083,336		1,932,565		1,971,005		3,119		3,140		3,310		2,086,455		1,935,705		1,974,315
PCI - commercial real estate(1)	104,682		127,892		133,076		—		—		—		104,682		127,892		133,076
Total commercial real estate	6,729,259		6,558,570		6,385,903		17,515		22,048		14,878		6,746,774		6,580,618		6,400,781
Home equity	570,321		654,067		665,388		8,523		8,978		7,581		578,844		663,045		672,969
Residential real estate, including PCI	908,188		810,865		774,756		16,062		21,255		14,743		924,250		832,120		789,499
Premium finance receivables
Commercial insurance loans	2,864,497		2,613,160		2,645,501		20,830		21,405		19,411		2,885,327		2,634,565		2,664,912
Life insurance loans	4,225,481		3,835,790		3,579,271		—		—		6,740		4,225,481		3,835,790		3,586,011
PCI - life insurance loans (1)	173,490		199,269		209,463		—		—		—		173,490		199,269		209,463
Consumer and other, including PCI	115,239		106,933		132,413		588		780		699		115,827		107,713		133,112
Total loans, net of unearned income, excluding covered loans	$	22,996,724	$	21,550,635	$	20,834,798	$	127,227	$	90,162	$	77,983	$	23,123,951	$	21,640,797	$	20,912,781

(1) PCI loans represent loans acquired with evidence of credit quality deterioration since origination, in accordance with ASC 310-30. See Note 6 - Loans for further discussion of these purchased loans.

23

A summary of activity in the allowance for credit losses by loan portfolio (excluding covered loans) for the nine months endedSeptember 30, 2018 and 2017 is as follows:

Three months ended September 30, 2018				Commercial Real Estate			Home  Equity			Residential Real Estate			Premium Finance Receivables			Consumer and Other			Total, Excluding Covered Loans
(Dollars in thousands)	Commercial
Allowance for credit losses
Allowance for loan losses at beginning of period	$	60,727		$	57,660		$	9,551		$	6,336		$	7,734		$	1,394		$	143,402
Other adjustments	(1		)	(15		)	(2		)	(14		)	14			—			(18		)
Reclassification from allowance for unfunded lending-related commitments	—			(2		)	—			—			—			—			(2		)
Charge-offs	(3,219		)	(208		)	(561		)	(337		)	(2,512		)	(144		)	(6,981		)
Recoveries	304			193			142			466			1,142			66			2,313
Provision for credit losses	8,934			619			13			(160		)	1,796			(160		)	11,042
Allowance for loan losses at period end	$	66,745		$	58,247		$	9,143		$	6,291		$	8,174		$	1,156		$	149,756
Allowance for unfunded lending-related commitments at period end	$	—		$	1,245		$	—		$	—		$	—		$	—		$	1,245
Allowance for credit losses at period end	$	66,745		$	59,492		$	9,143		$	6,291		$	8,174		$	1,156		$	151,001
Individually evaluated for impairment	$	10,164		$	3,158		$	611		$	325		$	—		$	117		$	14,375
Collectively evaluated for impairment	55,987			56,316			8,532			5,894			8,174			1,039			135,942
Loans acquired with deteriorated credit quality	594			18			—			72			—			—			684
Loans at period end
Individually evaluated for impairment	$	67,381		$	31,952		$	11,284		$	21,781		$	—		$	401		$	132,799
Collectively evaluated for impairment	7,390,781			6,610,140			567,560			815,442			7,110,808			113,812			22,608,543
Loans acquired with deteriorated credit quality	15,796			104,682			—			9,144			173,490			1,614			304,726
Loans held at fair value	—			—			—			77,883			—			—			77,883

Three months ended September 30, 2017	Commercial			Commercial Real Estate			Home  Equity			Residential Real Estate			Premium Finance Receivables			Consumer and Other			Total, Excluding Covered Loans
(Dollars in thousands)
Allowance for credit losses
Allowance for loan losses at beginning of period	$	52,358		$	52,339		$	11,134		$	6,143		$	6,352		$	1,265		$	129,591
Other adjustments	(2		)	(38		)	—			(31		)	32			—			(39		)
Reclassification from allowance for unfunded lending-related commitments	500			(406		)	—			—			—			—			94
Charge-offs	(2,265		)	(989		)	(968		)	(267		)	(1,716		)	(213		)	(6,418		)
Recoveries	801			323			178			55			499			93			1,949
Provision for credit losses	4,343			811			212			757			1,386			433			7,942
Allowance for loan losses at period end	$	55,735		$	52,040		$	10,556		$	6,657		$	6,553		$	1,578		$	133,119
Allowance for unfunded lending-related commitments at period end	$	—		$	1,276		$	—		$	—		$	—		$	—		$	1,276
Allowance for credit losses at period end	$	55,735		$	53,316		$	10,556		$	6,657		$	6,553		$	1,578		$	134,395
Individually evaluated for impairment	$	4,568		$	1,184		$	691		$	758		$	—		$	34		$	7,235
Collectively evaluated for impairment	50,623			52,048			9,865			5,813			6,553			1,544			126,446
Loans acquired with deteriorated credit quality	544			84			—			86			—			—			714
Loans at period end
Individually evaluated for impairment	$	18,086		$	31,698		$	7,729		$	21,263		$	—		$	544		$	79,320
Collectively evaluated for impairment	6,428,263			6,236,007			665,240			735,185			6,250,923			13,581			20,447,199
Loans acquired with deteriorated credit quality	9,685			133,076			—			3,637			209,463			987			356,848
Loans held at fair value	—			—			—			29,414			—			—			29,414

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Nine months ended September 30, 2018				Commercial Real Estate			Home  Equity			Residential Real Estate			Premium Finance Receivable			Consumer and Other			Total, Excluding Covered Loans
(Dollars in thousands)	Commercial
Allowance for credit losses
Allowance for loan losses at beginning of period	$	57,811		$	55,227		$	10,493		$	6,688		$	6,846		$	840		$	137,905
Other adjustments	(3		)	(66		)	(2		)	(19		)	(12		)	—			(102		)
Reclassification from allowance for unfunded lending-related commitments	—			24			—			—			—			—			24
Charge-offs	(8,116		)	(1,176		)	(1,530		)	(1,088		)	(10,487		)	(732		)	(23,129		)
Recoveries	1,232			4,267			436			2,028			2,502			162			10,627
Provision for credit losses	15,821			(29		)	(254		)	(1,318		)	9,325			886			24,431
Allowance for loan losses at period end	$	66,745		$	58,247		$	9,143		$	6,291		$	8,174		$	1,156		$	149,756
Allowance for unfunded lending-related commitments at period end	$	—		$	1,245		$	—		$	—		$	—		$	—		$	1,245
Allowance for credit losses at period end	$	66,745		$	59,492		$	9,143		$	6,291		$	8,174		$	1,156		$	151,001

Nine months ended September 30, 2017				Commercial Real Estate			Home  Equity			Residential Real Estate			Premium Finance Receivable			Consumer and Other			Total, Excluding Covered Loans
(Dollars in thousands)	Commercial
Allowance for credit losses
Allowance for loan losses at beginning of period	$	44,493		$	51,422		$	11,774		$	5,714		$	7,625		$	1,263		$	122,291
Other adjustments	(23		)	(121		)	—			(38		)	57			—			(125		)
Reclassification from allowance for unfunded lending-related commitments	500			(438		)	—			—			—			—			62
Charge-offs	(3,819		)	(3,235		)	(3,224		)	(742		)	(5,021		)	(522		)	(16,563		)
Recoveries	1,635			1,153			387			287			1,515			267			5,244
Provision for credit losses	12,949			3,259			1,619			1,436			2,377			570			22,210
Allowance for loan losses at period end	$	55,735		$	52,040		$	10,556		$	6,657		$	6,553		$	1,578		$	133,119
Allowance for unfunded lending-related commitments at period end	$	—		$	1,276		$	—		$	—		$	—		$	—		$	1,276
Allowance for credit losses at period end	$	55,735		$	53,316		$	10,556		$	6,657		$	6,553		$	1,578		$	134,395

A summary of activity in the allowance for covered loan losses for the three and nine months endedSeptember 30, 2017 is as follows:

	Three Months Ended			Nine Months Ended
	September 30,			September 30,
(Dollars in thousands)	2017			2017
Balance at beginning of period	$	1,074		$	1,322
Provision for covered loan losses before benefit attributable to FDIC loss share agreements	(225		)	(1,063		)
Benefit attributable to FDIC loss share agreements	180			850
Net provision for covered loan losses	(45		)	(213		)
Increase in FDIC indemnification liability	(180		)	(850		)
Loans charged-off	(155		)	(491		)
Recoveries of loans charged-off	64			990
Net (charge-offs) recoveries	(91		)	499
Balance at end of period	$	758		$	758

In conjunction with FDIC-assisted transactions, the Company entered into loss share agreements with the FDIC. Additional expected losses, to the extent such expected losses resulted in the recognition of an allowance for loan losses, increased the FDIC loss share asset or reduced any FDIC loss share liability. The allowance for loan losses for loans acquired in FDIC-assisted transactions was determined without giving consideration to the amounts recoverable through loss share agreements (since the loss share agreements were separately accounted for and thus presented “gross” on the balance sheet). On the Consolidated Statements of Income, the provision for credit losses was reported net of changes in the amount recoverable under the loss share agreements. Reductions to expected losses, to the extent such reductions to expected losses were the result of an improvement to the actual or expected cash flows from the covered assets, reduced the FDIC loss share asset or increased any FDIC loss share liability. Additions to expected losses required an increase to the allowance

25

for covered loan losses, and a corresponding increase to the FDIC loss share asset or reduction to any FDIC loss share liability. See “FDIC-Assisted Transactions” within Note 3 – Business Combinations for more detail.

On October 16, 2017, the Company entered into agreements with the FDIC that terminated all existing loss share agreements with the FDIC. As a result, the allowance for covered loan losses previously measured is included within the allowance for credit losses, excluding covered loans, presented above for subsequent periods. See Note 3 - Business Combinations for further discussion of the termination of FDIC loss share agreements.

Impaired Loans

A summary of impaired loans, including troubled debt restructurings ("TDRs"), is as follows:

	September 30,		December 31,		September 30,
(Dollars in thousands)	2018		2017		2017
Impaired loans (included in non-performing and TDRs):
Impaired loans with an allowance for loan loss required (1)	$	83,349	$	36,084	$	30,864
Impaired loans with no allowance for loan loss required	49,173		69,004		47,730
Total impaired loans (2)	$	132,522	$	105,088	$	78,594
Allowance for loan losses related to impaired loans	$	14,365	$	8,023	$	7,218
TDRs	$	66,219	$	49,786	$	33,183

(1) These impaired loans require an allowance for loan losses because the estimated fair value of the loans or related collateral is less than the recorded investment in the loans.

(2) Impaired loans are considered by the Company to be non-accrual loans, TDRs or loans with principal and/or interest at risk, even if theloan is current with all payments of principal and interest.

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The following tables present impaired loans by loan class, excluding covered loans, for the periods ended as follows:

							For the Nine Months Ended
	As of September 30, 2018						September 30, 2018
	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average  Recorded Investment		Interest Income Recognized
(Dollars in thousands)
Impaired loans with a related ASC 310 allowance recorded
Commercial
Commercial, industrial and other	$	36,564	$	36,699	$	8,242	$	30,259	$	1,404
Franchise	16,316		18,504		1,638		18,387		771
Asset-based lending	646		646		283		724		39
Leases	1,777		1,777		1		1,836		69
Commercial real estate
Construction	1,554		1,554		390		1,554		56
Land	1,375		1,375		1		1,508		53
Office	579		647		26		591		19
Industrial	45		154		1		56		6
Retail	15,325		15,567		2,413		15,376		535
Multi-family	1,197		1,197		8		1,209		32
Mixed use and other	1,590		1,801		309		1,754		76
Home equity	2,287		2,651		611		2,303		78
Residential real estate	3,977		4,291		325		3,998		128
Consumer and other	117		130		117		119		5
Impaired loans with no related ASC 310 allowance recorded
Commercial
Commercial, industrial and other	$	5,758	$	7,022	$	—	$	9,325	$	465
Franchise	5,157		5,158		—		5,376		302
Asset-based lending	264		1,088		—		1,623		89
Leases	899		930		—		974		43
Commercial real estate
Construction	1,117		1,117		—		1,252		40
Land	2,325		2,431		—		2,366		98
Office	1,532		2,077		—		1,541		86
Industrial	178		195		—		188		9
Retail	777		946		—		874		42
Multi-family	318		412		—		329		9
Mixed use and other	3,763		4,362		—		3,950		194
Home equity	8,997		12,131		—		9,015		462
Residential real estate	17,804		20,291		—		18,193		643
Consumer and other	284		408		—		295		15
Total impaired loans, net of unearned income	$	132,522	$	145,561	$	14,365	$	134,975	$	5,768

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							For the Twelve Months Ended
	As of December 31, 2017						December 31, 2017
	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average  Recorded Investment		Interest Income Recognized
(Dollars in thousands)
Impaired loans with a related ASC 310 allowance recorded
Commercial
Commercial, industrial and other	$	6,233	$	7,323	$	3,951	$	7,220	$	452
Franchise	—		—		—		—		—
Asset-based lending	948		949		355		1,302		72
Leases	2,331		2,337		158		2,463		117
Commercial real estate
Construction	3,097		3,897		403		3,690		197
Land	—		—		—		—		—
Office	471		471		5		481		24
Industrial	408		408		40		414		25
Retail	15,599		15,657		1,336		15,736		624
Multi-family	—		—		—		—		—
Mixed use and other	1,567		1,586		379		1,599		77
Home equity	1,606		1,869		784		1,626		81
Residential real estate	3,798		3,910		586		3,790		146
Consumer and other	26		28		26		27		2
Impaired loans with no related ASC 310 allowance recorded
Commercial
Commercial, industrial and other	$	8,460	$	12,259	$	—	$	10,170	$	683
Franchise	16,256		16,256		—		17,089		780
Asset-based lending	602		602		—		688		40
Leases	782		782		—		845		49
Commercial real estate
Construction	1,367		1,678		—		1,555		84
Land	3,961		4,192		—		4,129		182
Office	2,438		6,140		—		3,484		330
Industrial	403		2,010		—		1,849		174
Retail	2,393		3,538		—		2,486		221
Multi-family	1,231		2,078		—		1,246		76
Mixed use and other	5,275		6,731		—		5,559		351
Home equity	7,648		11,648		—		9,114		603
Residential real estate	17,455		20,327		—		17,926		860
Consumer and other	733		890		—		773		48
Total impaired loans, net of unearned income	$	105,088	$	127,566	$	8,023	$	115,261	$	6,298

28

							For the Nine Months Ended
	As of September 30, 2017						September 30, 2017
	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average  Recorded Investment		Interest Income Recognized
(Dollars in thousands)
Impaired loans with a related ASC 310 allowance recorded
Commercial
Commercial, industrial and other	$	7,312	$	8,458	$	4,191	$	8,390	$	407
Franchise	—		—		—		—		—
Asset-based lending	588		589		161		588		21
Leases	2,440		2,444		215		2,539		91
Commercial real estate
Construction	1,607		2,408		94		2,319		93
Land	—		—		—		—		—
Office	2,225		2,291		570		2,280		94
Industrial	408		408		75		415		19
Retail	5,932		6,072		158		5,998		191
Multi-family	1,239		1,239		8		1,250		33
Mixed use and other	1,537		1,695		263		1,580		60
Home equity	1,511		1,721		691		1,528		53
Residential real estate	5,842		6,154		758		5,842		177
Consumer and other	223		224		34		225		10
Impaired loans with no related ASC 310 allowance recorded
Commercial
Commercial, industrial and other	$	5,995	$	7,260	$	—	$	6,662	$	294
Franchise	—		—		—		—		—
Asset-based lending	553		553		—		728		31
Leases	817		817		—		862		38
Commercial real estate
Construction	1,504		1,504		—		1,524		49
Land	3,968		4,217		—		4,110		136
Office	3,400		3,585		—		3,565		147
Industrial	1,440		2,729		—		2,885		183
Retail	1,978		1,988		—		2,008		103
Multi-family	569		653		—		571		23
Mixed use and other	5,546		6,267		—		5,745		241
Home equity	6,218		9,523		—		7,231		339
Residential real estate	15,421		17,859		—		15,726		575
Consumer and other	321		433		—		334		16
Total impaired loans, net of unearned income	$	78,594	$	91,091	$	7,218	$	84,905	$	3,424

TDRs

At September 30, 2018, the Company had $66.2 million in loans modified in TDRs. The $66.2 million in TDRs represents 111 credits in which economic concessions were granted to certain borrowers to better align the terms of their loans with their current ability to pay.

The Company’s approach to restructuring loans, excluding PCI loans, is built on its credit risk rating system which requires credit management personnel to assign a credit risk rating to each loan. In each case, the loan officer is responsible for recommending a credit risk rating for each loan and ensuring the credit risk ratings are appropriate. These credit risk ratings are then reviewed and approved by the bank’s chief credit officer and/or concurrence credit officer. Credit risk ratings are determined by evaluating a number of factors including a borrower’s financial strength, cash flow coverage, collateral protection and guarantees. The Company’s credit risk rating scale is one through ten with higher scores indicating higher risk. In the case of loans rated six or worse following modification, the Company’s Managed Assets Division evaluates the loan and the credit risk rating and determines that the loan has been restructured to be reasonably assured of repayment and of performance according to the modified terms and is supported by a current, well-documented credit assessment of the borrower’s financial condition and prospects for repayment under the revised terms.

A modification of a loan, excluding PCI loans, with an existing credit risk rating of 6 or worse or a modification of any other credit, which will result in a restructured credit risk rating of six or worse, must be reviewed for possible TDR classification. In that event, our Managed Assets Division conducts an overall credit and collateral review. A modification of these loans is considered to be a TDR if both (1) the borrower is experiencing financial difficulty and (2) for economic or legal reasons, the bank grants a concession to a borrower

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that it would not otherwise consider. The modification of a loan, excluding PCI loans, where the credit risk rating is 5 or better both before and after such modification is not considered to be a TDR. Based on the Company’s credit risk rating system, it considers that borrowers whose credit risk rating is 5 or better are not experiencing financial difficulties and therefore, are not considered TDRs.

All credits determined to be a TDR will continue to be classified as a TDR in all subsequent periods, unless the borrower has been in compliance with the loan’s modified terms for a period of six months (including over a calendar year-end) and the current interest rate represents a market rate at the time of restructuring. The Managed Assets Division, in consultation with the respective loan officer, determines whether the modified interest rate represented a current market rate at the time of restructuring. Using knowledge of current market conditions and rates, competitive pricing on recent loan originations, and an assessment of various characteristics of the modified loan (including collateral position and payment history), an appropriate market rate for a new borrower with similar risk is determined. If the modified interest rate meets or exceeds this market rate for a new borrower with similar risk, the modified interest rate represents a market rate at the time of restructuring. Additionally, before removing a loan from TDR classification, a review of the current or previously measured impairment on the loan and any concerns related to future performance by the borrower is conducted. If concerns exist about the future ability of the borrower to meet its obligations under the loans based on a credit review by the Managed Assets Division, the TDR classification is not removed from the loan.

TDRs are reviewed at the time of the modification and on a quarterly basis to determine if a specific reserve is necessary. The carrying amount of the loan is compared to the expected payments to be received, discounted at the loan's original rate, or for collateral dependent loans, to the fair value of the collateral. Any shortfall is recorded as a specific reserve. The Company, in accordance with ASC 310-10, continues to individually measure impairment of these loans after the TDR classification is removed.

Each TDR was reviewed for impairment at September 30, 2018 and approximately $3.9 million of impairment was present and appropriately reserved for through the Company’s normal reserving methodology in the Company’s allowance for loan losses. For TDRs in which impairment is calculated by the present value of future cash flows, the Company records interest income representing the decrease in impairment resulting from the passage of time during the respective period, which differs from interest income from contractually required interest on these specific loans.  During the three months ended September 30, 2018 and 2017, the Company recorded $32,000 and $68,000, respectively, of interest income, which was reflected as a decrease in impairment. For the nine months endedSeptember 30, 2018 and 2017, the Company recorded $89,000 and $172,000, respectively, of interest income, which was reflected as a decrease in impairment.

TDRs may arise when, due to financial difficulties experienced by the borrower, the Company obtains through physical possession one or more collateral assets in satisfaction of all or part of an existing credit. Once possession is obtained, the Company reclassifies the appropriate portion of the remaining balance of the credit from loans to OREO, which is included within other assets in the Consolidated Statements of Condition. For any residential real estate property collateralizing a consumer mortgage loan, the Company is considered to possess the related collateral only if legal title is obtained upon completion of foreclosure, or the borrower conveys all interest in the residential real estate property to the Company through completion of a deed in lieu of foreclosure or similar legal agreement. At September 30, 2018, the Company had $5.7 million of foreclosed residential real estate properties included within OREO. Furthermore, the recorded investment in residential mortgage loans secured by residential real estate properties for which foreclosure proceedings are in process totaled $14.2 million and $12.1 million at September 30, 2018 and 2017, respectively.

The tables below present a summary of the post-modification balance of loans restructured during the three and nine months endedSeptember 30, 2018 and 2017, respectively, which represent TDRs:

Three months ended September 30, 2018 (Dollars in thousands)	Total (1)(2)			Extension at Below Market Terms (2)			Reduction of Interest Rate (2)			Modification to  Interest-only Payments (2)			Forgiveness of Debt(2)
	Count	Balance		Count	Balance		Count	Balance		Count	Balance		Count	Balance
Commercial
Commercial, industrial and other	1	$	519	1	$	519	—	$	—	—	$	—	—	$	—
Franchise	1	35		1	35		—	—		—	—		—	—
Leases	—	—		—	—		—	—		—	—		—	—
Commercial real estate
Office	—	—		—	—		—	—		—	—		—	—
Mixed use and other	—	—		—	—		—	—		—	—		—	—
Residential real estate and other	20	3,679		20	3,679		7	621		—	—		—	—
Total loans	22	$	4,233	22	$	4,233	7	$	621	—	$	—	—	$	—

(1) TDRs may have more than one modification representing a concession. As such, TDRs during the period may be represented in more than one of the categories noted above.

(2) Balances represent the recorded investment in the loan at the time of the restructuring.

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Three months ended September 30, 2017 (Dollars in thousands)	Total (1)(2)			Extension at Below Market Terms (2)			Reduction of Interest Rate (2)			Modification to  Interest-only Payments (2)			Forgiveness of Debt(2)
	Count	Balance		Count	Balance		Count	Balance		Count	Balance		Count	Balance
Commercial
Commercial, industrial and other	3	$	1,408	—	$	—	—	$	—	3	$	1,408	—	$	—
Franchise	—	—		—	—		—	—		—	—		—	—
Leases	—	—		—	—		—	—		—	—		—	—
Commercial real estate
Office	—	—		—	—		—	—		—	—		—	—
Mixed use and other	—	—		—	—		—	—		—	—		—	—
Residential real estate and other	2	255		1	186		2	255		—	—		1	69
Total loans	5	$	1,663	1	$	186	2	$	255	3	$	1,408	1	$	69

(1) TDRs may have more than one modification representing a concession. As such, TDRs during the period may be represented in more than one of the categories noted above.

(2) Balances represent the recorded investment in the loan at the time of the restructuring.

During the three months ended September 30, 2018, 22 loans totaling $4.2 million were determined to be TDRs, compared to five loans totaling $1.7 million during the three months ended September 30, 2017. Of these loans extended at below market terms, the weighted average extension had a term of approximately 72 months during the quarter ended September 30, 2018 compared to 36 months for the quarter ended September 30, 2017. Further, the weighted average decrease in the stated interest rate for loans with a reduction of interest rate during the period was approximately 140 basis points and 225 basis points during the three months ended September 30, 2018 and 2017, respectively. Interest-only payment terms were approximately two months during the three months ended September 30, 2017. Additionally, no principal balances were forgiven in the third quarter of 2018 compared to $73,000 of principal balances forgiven in the third quarter of 2017.

Nine months ended September 30, 2018 (Dollars in thousands)	Total (1)(2)			Extension at Below Market Terms (2)			Reduction of Interest Rate (2)			Modification to  Interest-only Payments (2)			Forgiveness of Debt(2)
	Count	Balance		Count	Balance		Count	Balance		Count	Balance		Count	Balance
Commercial
Commercial, industrial and other	4	$	13,442	3	$	692	—	$	—	1	$	12,750	—	$	—
Franchise	3	5,157		1	35		—	—		2	5,122		—	—
Leases	1	239		1	239		—	—		—	—		—	—
Commercial real estate
Office	1	59		1	59		—	—		—	—		—	—
Mixed use and other	1	85		1	85		1	85		—	—		—	—
Residential real estate and other	31	5,846		31	5,846		12	1,417		—	—		—	—
Total loans	41	$	24,828	38	$	6,956	13	$	1,502	3	$	17,872	—	$	—

Nine months ended September 30, 2017 (Dollars in thousands)	Total (1)(2)			Extension at Below Market Terms (2)			Reduction of Interest Rate (2)			Modification to  Interest-only Payments (2)			Forgiveness of Debt(2)
	Count	Balance		Count	Balance		Count	Balance		Count	Balance		Count	Balance
Commercial
Commercial, industrial and other	4	$	1,503	1	$	95	—	$	—	3	$	1,408	—	$	—
Franchise	—	—		—	—		—	—		—	—		—	—
Leases	—	—		—	—		—	—		—	—		—	—
Commercial real estate
Office	—	—		—	—		—	—		—	—		—	—
Mixed use and other	1	1,245		1	1,245		—	—		—	—		—	—
Residential real estate and other	8	2,638		7	2,569		7	2,589		—	—		1	69
Total loans	13	$	5,386	9	$	3,909	7	$	2,589	3	$	1,408	1	$	69

(1) TDRs may have more than one modification representing a concession. As such, TDRs during the period may be represented in more than one of the categories noted above.

(2) Balances represent the recorded investment in the loan at the time of the restructuring.

During the nine months ended September 30, 2018, 41 loans totaling $24.8 million were determined to be TDRs, compared to 13 loans totaling $5.4 million in the same period of 2017. Of these loans extended at below market terms, the weighted average extension had a term of approximately 64 months during the nine months ended September 30, 2018 compared to 36 months for the nine months ended

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September 30, 2017. Further, the weighted average decrease in the stated interest rate for loans with a reduction of interest rate during the period was approximately 160 basis points and 188 basis points for the year-to-date periods September 30, 2018 and 2017, respectively. Interest-only payment terms were approximately seven months during the nine months ended September 30, 2018 compared to two months during the same period of 2017. Additionally, no principal balances were forgiven in the first nine months of 2018 compared to $73,000 of principal balances forgiven in the first nine months of 2017.

The following table presents a summary of all loans restructured in TDRs during the twelve months ended September 30, 2018 and 2017, and such loans which were in payment default under the restructured terms during the respective periods below:

(Dollars in thousands)	As of September 30, 2018			Three Months Ended September 30, 2018			Nine Months Ended September 30, 2018
	Total (1)(3)			Payments in Default  (2)(3)			Payments in Default  (2)(3)
	Count	Balance		Count	Balance		Count	Balance
Commercial
Commercial, industrial and other	5	$	15,714	3	$	2,447	3	$	2,447
Franchise	6	21,413		2	5,122		2	5,122
Leases	1	239		—	—		—	—
Commercial real estate
Office	1	59		—	—		—	—
Industrial	—	—		—	—		—	—
Mixed use and other	1	85		1	85		1	85
Residential real estate and other	35	6,257		7	1,457		7	1,457
Total loans	49	$	43,767	13	$	9,111	13	$	9,111

(Dollars in thousands)	As of September 30, 2017			Three Months Ended September 30, 2017			Nine Months Ended September 30, 2017
	Total (1)(3)			Payments in Default  (2)(3)			Payments in Default  (2)(3)
	Count	Balance		Count	Balance		Count	Balance
Commercial
Commercial, industrial and other	4	$	1,503	—	$	—	—	$	—
Franchise	—	—		—	—		—	—
Leases	2	2,949		—	—		—	—
Commercial real estate
Office	—	—		—	—		—	—
Mixed use and other	1	1,245		1	1,245		1	1,245
Residential real estate and other	12	3,137		1	52		2	284
Total loans	19	$	8,834	2	$	1,297	3	$	1,529

(1) Total TDRs represent all loans restructured in TDRs during the previous twelve months from the date indicated.

(2) TDRs considered to be in payment default are over 30 days past-due subsequent to the restructuring.

(3) Balances represent the recorded investment in the loan at the time of the restructuring.

(8) Goodwill and Other Intangible Assets

A summary of the Company’s goodwill assets by business segment is presented in the following table:

(Dollars in thousands)	January 1, 2018		Goodwill Acquired		Impairment Loss		Goodwill Adjustments			September 30, 2018
Community banking	$	429,520	$	36,307	$	—	$	—		$	465,827
Specialty finance	40,250		—		—		(631		)	39,619
Wealth management	32,114		—		—		—			32,114
Total	$	501,884	$	36,307	$	—	$	(631	)	$	537,560

The community banking segment's goodwill increased $36.3 million in the first nine months of 2018 primarily as a result of the acquisition of CSC and Veterans First. The specialty finance segment's goodwill decreased $631,000 in the first nine months of 2018 as a result of foreign currency translation adjustments related to the Canadian acquisitions.

At June 30, 2018, the Company utilized a qualitative approach for its annual goodwill impairment test of the community banking segment and determined that it is not more likely than not that an impairment existed at that time. At December 31, 2017, the Company utilized a quantitative approach for its annual goodwill impairment tests of the specialty finance and wealth management segments and determined that no impairment existed at that time. At each reporting date between annual goodwill impairment

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tests, the Company considers potential indicators of impairment. As of September 30, 2018, the Company identified no such indicators of goodwill impairment within the community banking, specialty finance and wealth management segments.

A summary of intangible assets as of the dates shown and the expected amortization of finite-lived intangible assets as of September 30, 2018 is as follows:

(Dollars in thousands)	September 30, 2018			December 31, 2017			September 30, 2017
Community banking segment:
Core deposit intangibles with finite lives:
Gross carrying amount	$	44,395		$	37,272		$	37,272
Accumulated amortization	(28,142		)	(25,427		)	(24,550		)
Net carrying amount	$	16,253		$	11,845		$	12,722
Trademark with indefinite lives:
Carrying amount	5,800			—			—
Total net carrying amount	$	22,053		$	11,845		$	12,722
Specialty finance segment:
Customer list intangibles with finite lives:
Gross carrying amount	$	1,967		$	1,972		$	1,972
Accumulated amortization	(1,407		)	(1,298		)	(1,258		)
Net carrying amount	$	560		$	674		$	714
Wealth management segment:
Customer list and other intangibles with finite lives:
Gross carrying amount	$	7,940		$	7,940		$	7,940
Accumulated amortization	(3,175		)	(2,838		)	(2,725		)
Net carrying amount	$	4,765		$	5,102		$	5,215
Total other intangible assets, net	$	27,378		$	17,621		$	18,651

Estimated amortization
Actual in nine months ended September 30, 2018	$	3,164
Estimated remaining in 2018	1,253
Estimated—2019	4,517
Estimated—2020	3,681
Estimated—2021	3,014
Estimated—2022	2,388

The core deposit intangibles recognized in connection with prior bank acquisitions are amortized over a ten-year period on an accelerated basis. The customer list intangibles recognized in connection with the purchase of life insurance premium finance assets in 2009 are being amortized over an 18-year period on an accelerated basis while the customer list intangibles recognized in connection with prior acquisitions within the wealth management segment are being amortized over a ten-year period on a straight-line basis. Indefinite-lived intangible assets consist of certain trade and domain names recognized in connection with the Veterans First acquisition. As indefinite-lived intangible assets are not amortized, the Company assesses impairment on at least an annual basis.

Total amortization expense associated with finite-lived intangibles totaled approximately $3.2 million and $3.4 million for the nine months ended September 30, 2018 and 2017, respectively.

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(9) Mortgage Servicing Rights (“MSRs”)

The following is a summary of the changes in the carrying value of MSRs, accounted for at fair value, for the periods indicated:

	Three Months Ended						Nine Months Ended
	September 30,			September 30,			September 30,			September 30,
(Dollars in thousands)	2018			2017			2018			2017
Balance at beginning of the period	$	63,194		$	27,307		$	33,676		$	19,103
Additions from loans sold with servicing retained	11,340			4,948			23,388			13,162
Additions from acquisitions	—			—			13,806			—
Estimate of changes in fair value due to:
Payoffs and paydowns	(1,081		)	(641		)	(3,647		)	(1,632		)
Changes in valuation inputs or assumptions	1,077			(2,200		)	7,307			(1,219		)
Fair value at end of the period	$	74,530		$	29,414		$	74,530		$	29,414
Unpaid principal balance of mortgage loans serviced for others	$	5,904,300		$	2,622,411

The Company recognizes MSR assets upon the sale of residential real estate loans to external third parties when it retains the obligation to service the loans and the servicing fee is more than adequate compensation. The initial recognition of MSR assets from loans sold with servicing retained and subsequent changes in fair value of all MSRs are recognized in mortgage banking revenue. MSRs are subject to changes in value from actual and expected prepayment of the underlying loans. The Company does not specifically hedge the value of its MSRs.

Fair values are determined by using a discounted cash flow model that incorporates the objective characteristics of the portfolio as well as subjective valuation parameters that purchasers of servicing would apply to such portfolios sold into the secondary market. The subjective factors include loan prepayment speeds, discount rates, servicing costs and other economic factors. The Company uses a third party to assist in the valuation of MSRs.

(10) Deposits

The following table is a summary of deposits as of the dates shown:

(Dollars in thousands)	September 30, 2018			December 31, 2017			September 30, 2017
Balance:
Non-interest bearing	$	6,399,213		$	6,792,497		$	6,502,409
NOW and interest bearing demand deposits	2,512,259			2,315,055			2,273,025
Wealth management deposits	2,520,120			2,323,699			2,171,758
Money market	5,429,921			4,515,353			4,607,995
Savings	2,595,164			2,829,373			2,673,201
Time certificates of deposit	5,460,038			4,407,370			4,666,675
Total deposits	$	24,916,715		$	23,183,347		$	22,895,063
Mix:
Non-interest bearing	26		%	29		%	28		%
NOW and interest bearing demand deposits	10			10			10
Wealth management deposits	10			10			10
Money market	22			20			20
Savings	10			12			12
Time certificates of deposit	22			19			20
Total deposits	100		%	100		%	100		%

Wealth management deposits represent deposit balances (primarily money market accounts) at the Company’s subsidiary banks from brokerage customer of Wintrust Investments, LLC ("Wintrust Investments"), trust and asset management customers of the Company and brokerage customers from unaffiliated companies.

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(11) FHLB Advances, Other Borrowings and Subordinated Notes

The following table is a summary of FHLB advances, other borrowings and subordinated notes as of the dates shown:

(Dollars in thousands)	September 30, 2018		December 31, 2017		September 30, 2017
FHLB advances	$	615,000	$	559,663	$	468,962
Other borrowings:
Notes payable	149,799		41,222		41,216
Short-term borrowings	17,431		17,209		19,959
Other	48,043		49,131		49,502
Secured borrowings	158,298		158,561		141,003
Total other borrowings	373,571		266,123		251,680
Subordinated notes	139,172		139,088		139,052
Total FHLB advances, other borrowings and subordinated notes	$	1,127,743	$	964,874	$	859,694

FHLB Advances

FHLB advances consist of obligations of the banks and are collateralized by qualifying commercial and residential real estate and home equity loans and certain securities. FHLB advances are stated at par value of the debt adjusted for unamortized prepayment fees paid at the time of prior restructurings of FHLB advances and unamortized fair value adjustments recorded in connection with advances acquired through acquisitions.

Notes Payable

On September 18, 2018, the Company established a $150.0 million term facility ("Term Facility"), which is part of a $200.0 million loan agreement ("Credit Agreement") with unaffiliated banks. The Credit Agreement consists of the Term Facility with an original outstanding balance of $150.0 million and a $50.0 million revolving credit facility ("Revolving Credit Facility"). At September 30, 2018, the Company had a notes payable balance of $149.8 million under the Term Facility. The Term Facility is stated at par of the current outstanding balance of the debt adjusted for unamortized costs paid by the Company in relation to the debt issuance. The Company was contractually required to borrow the entire amount of the Term Facility on September 18, 2018 and all such borrowings must be repaid by September 18, 2023. Beginning December 31, 2018, the Company is required to make quarterly payments of principal plus interest on the Term Facility. At September 30, 2018, the Company had no outstanding balance under the Revolving Credit Facility. As no outstanding balance exists on the Revolving Credit Facility, unamortized costs paid by the Company in relation to the issuance of this debt are classified in other assets on the Consolidated Statements of Condition.

Borrowings under the Credit Agreement that are considered “Base Rate Loans” bear interest at a rate equal to the sum of (1) 50 basis points (in the case of a borrowing under the Revolving Credit Facility) or 75 basis points (in the case of a borrowing under the Term Facility) plus (2) the highest of (a) the federal funds rate plus 50 basis points, (b) the lender's prime rate, and (c) the Eurodollar Rate (as defined below) that would be applicable for an interest period of one month plus 100 basis points. Borrowings under the agreement that are considered “Eurodollar Rate Loans” bear interest at a rate equal to the sum of (1) 125 basis points (in the case of a borrowing under the Revolving Credit Facility) or 125 basis points (in the case of a borrowing under the Term Facility) plus (2) the LIBOR rate for the applicable period, as adjusted for statutory reserve requirements for eurocurrency liabilities (the “Eurodollar Rate”). A commitment fee is payable quarterly equal to 0.20% of the actual daily amount by which the lenders' commitment under the Revolving Credit Facility exceeded the amount outstanding under such facility.

Borrowings under the Credit Agreement are secured by pledges of and first priority perfected security interests in the Company's equity interest in its bank subsidiaries and contain several restrictive covenants, including the maintenance of various capital adequacy levels, asset quality and profitability ratios, and certain restrictions on dividends and other indebtedness. At September 30, 2018, the Company was in compliance with all such covenants. The Revolving Credit Facility and the Term Facility are available to be utilized, as needed, to provide capital to fund continued growth at the Company’s banks and to serve as an interim source of funds for acquisitions, common stock repurchases or other general corporate purposes.

In connection with the establishment of the Credit Agreement, all outstanding notes payable under a $150.0 million loan agreement with unaffiliated banks dated December 15, 2014 (as subsequently amended) were paid in full. This loan agreement consisted of a term facility with an original outstanding balance of $75.0 million and a $75.0 million revolving credit facility. The Company had a balance under this loan agreement of $41.2 million at December 31, 2017 and $41.2 million at September 30, 2017.

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Short-term Borrowings

Short-term borrowings include securities sold under repurchase agreements and federal funds purchased. These borrowings totaled $17.4 million at September 30, 2018 compared to $17.2 million at December 31, 2017 and $20.0 million at September 30, 2017. At September 30, 2018, December 31, 2017 and September 30, 2017, securities sold under repurchase agreements represent $17.4 million, $17.2 million and $20.0 million, respectively, of customer sweep accounts in connection with master repurchase agreements at the banks. The Company records securities sold under repurchase agreements at their gross value and does not offset positions on the Consolidated Statements of Condition. As of September 30, 2018, the Company had pledged securities related to its customer balances in sweep accounts of $35.9 million. Securities pledged for customer balances in sweep accounts and short-term borrowings from brokers are maintained under the Company’s control and consist of U.S. Government agency and mortgage-backed securities. These securities are included in the available-for-sale and held-to-maturity securities portfolios as reflected on the Company’s Consolidated Statements of Condition.

The following is a summary of these securities pledged as of September 30, 2018 disaggregated by investment category and maturity of the related customer sweep account, and reconciled to the outstanding balance of securities sold under repurchase agreements:

(Dollars in thousands)	Overnight Sweep Collateral
Available-for-sale securities pledged
Mortgage-backed securities	$	9,547
Held-to-maturity securities pledged
U.S. Government agencies	26,364
Total collateral pledged	$	35,911
Excess collateral	18,480
Securities sold under repurchase agreements	$	17,431

Other Borrowings

Other borrowings at September 30, 2018 represent a fixed-rate promissory note issued by the Company in June 2017 ("Fixed-Rate Promissory Note") related to and secured by two office buildings owned by the Company, and non-recourse notes issued by the Company to other banks related to certain capital leases. At September 30, 2018, the Fixed-Rate Promissory Note had a balance of $48.0 million compared to $49.0 million at December 31, 2017 and $49.3 million at September 30, 2017. Under the Fixed-Rate Promissory Note, the Company will make monthly principal payments and pay interest at a fixed rate of 3.36% until maturity on June 30, 2022. The Fixed-Rate Promissory Note contains several restrictive covenants, including the maintenance of various capital adequacy levels, asset quality and profitability ratios, and certain restrictions on dividends and indebtedness. At September 30, 2018, the Company was in compliance with all such covenants. At September 30, 2018, there were no non-recourse notes related to certain capital leases, compared to $151,000 and $225,000 at December 31, 2017 and September 30, 2017, respectively.

Secured Borrowings

Secured borrowings at September 30, 2018 primarily represents transactions to sell an undivided co-ownership interest in all receivables owed to the Company's subsidiary, First Insurance Funding of Canada ("FIFC Canada"). In December 2014, FIFC Canada sold such interest to an unrelated third party in exchange for a cash payment of approximately C$150 million pursuant to a receivables purchase agreement (“Receivables Purchase Agreement”). The Receivables Purchase Agreement was amended in December 2015, effectively extending the maturity date from December 15, 2015 to December 15, 2017. Additionally, at that time, the unrelated third party paid an additional C$10 million, which increased the total payments to C$160 million. The Receivables Purchase Agreement was again amended in December 2017, effectively extending the maturity date from December 15, 2017 to December 16, 2019. Additionally, in December 2017, the unrelated third party paid an additional C$10 million, which increased the total payments to C$170 million. In June 2018, the unrelated third party paid an additional C$20 million, which increased the total payments to C$190 million. These transactions were not considered sales of receivables and, as such, related proceeds received are reflected on the Company’s Consolidated Statements of Condition as a secured borrowing owed to the unrelated third party, net of unamortized debt issuance costs, and translated to the Company’s reporting currency as of the respective date. At September 30, 2018, the translated balance of the secured borrowing totaled $147.2 million compared to $135.1 million at December 31, 2017 and $128.3 million at September 30, 2017. Additionally, the interest rate under the Receivables Purchase Agreement at September 30, 2018 was 2.7189%. The remaining $11.1 million within secured borrowings at September 30, 2018

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represents other sold interests in certain loans by the Company that were not considered sales and, as such, related proceeds received are reflected on the Company’s Consolidated Statements of Condition as a secured borrowing owed to the various unrelated third parties.

Subordinated Notes

At September 30, 2018, the Company had outstanding subordinated notes totaling $139.2 million compared to $139.1 million and $139.1 million outstanding at December 31, 2017 and September 30, 2017, respectively. The notes have a stated interest rate of 5.00% and mature in June 2024. These notes are stated at par adjusted for unamortized costs paid related to the issuance of this debt.

(12) Junior Subordinated Debentures

As of September 30, 2018, the Company owned 100% of the common securities of eleven trusts, Wintrust Capital Trust III, Wintrust Statutory Trust IV, Wintrust Statutory Trust V, Wintrust Capital Trust VII, Wintrust Capital Trust VIII, Wintrust Capital Trust IX, Northview Capital Trust I, Town Bankshares Capital Trust I, First Northwest Capital Trust I, Suburban Illinois Capital Trust II, and Community Financial Shares Statutory Trust II (the “Trusts”) set up to provide long-term financing. The Northview, Town, First Northwest, Suburban, and Community Financial Shares capital trusts were acquired as part of the acquisitions of Northview Financial Corporation, Town Bankshares, Ltd., First Northwest Bancorp, Inc., Suburban and CFIS, respectively. The Trusts were formed for purposes of issuing trust preferred securities to third-party investors and investing the proceeds from the issuance of the trust preferred securities and common securities solely in junior subordinated debentures issued by the Company (or assumed by the Company in connection with an acquisition), with the same maturities and interest rates as the trust preferred securities. The junior subordinated debentures are the sole assets of the Trusts. In each Trust, the common securities represent approximately 3% of the junior subordinated debentures and the trust preferred securities represent approximately 97% of the junior subordinated debentures.

The Trusts are reported in the Company’s consolidated financial statements as unconsolidated subsidiaries. Accordingly, in the Consolidated Statements of Condition, the junior subordinated debentures issued by the Company to the Trusts are reported as liabilities and the common securities of the Trusts, all of which are owned by the Company, are included in investment securities.

The following table provides a summary of the Company’s junior subordinated debentures as of September 30, 2018. The junior subordinated debentures represent the par value of the obligations owed to the Trusts.

(Dollars in thousands)	Common Securities		Trust  Preferred Securities		Junior Subordinated Debentures		Rate Structure	Contractual rate at 9/30/2018		Issue Date	Maturity Date	Earliest Redemption Date
Wintrust Capital Trust III	$	774	$	25,000	$	25,774	L+3.25	5.59	%	04/2003	04/2033	04/2008
Wintrust Statutory Trust IV	619		20,000		20,619		L+2.80	5.20	%	12/2003	12/2033	12/2008
Wintrust Statutory Trust V	1,238		40,000		41,238		L+2.60	5.00	%	05/2004	05/2034	06/2009
Wintrust Capital Trust VII	1,550		50,000		51,550		L+1.95	4.28	%	12/2004	03/2035	03/2010
Wintrust Capital Trust VIII	1,238		25,000		26,238		L+1.45	3.85	%	08/2005	09/2035	09/2010
Wintrust Capital Trust IX	1,547		50,000		51,547		L+1.63	3.96	%	09/2006	09/2036	09/2011
Northview Capital Trust I	186		6,000		6,186		L+3.00	5.34	%	08/2003	11/2033	08/2008
Town Bankshares Capital Trust I	186		6,000		6,186		L+3.00	5.34	%	08/2003	11/2033	08/2008
First Northwest Capital Trust I	155		5,000		5,155		L+3.00	5.40	%	05/2004	05/2034	05/2009
Suburban Illinois Capital Trust II	464		15,000		15,464		L+1.75	4.08	%	12/2006	12/2036	12/2011
Community Financial Shares Statutory Trust II	109		3,500		3,609		L+1.62	3.95	%	06/2007	09/2037	06/2012
Total					$	253,566		4.55	%

The junior subordinated debentures totaled $253.6 million at September 30, 2018, December 31, 2017 and September 30, 2017.

The interest rates on the variable rate junior subordinated debentures are based on the three-month LIBOR rate and reset on a quarterly basis. At September 30, 2018, the weighted average contractual interest rate on the junior subordinated debentures was 4.55%. Distributions on the common and preferred securities issued by the Trusts are payable quarterly at a rate per annum equal to the interest rates being earned by the Trusts on the junior subordinated debentures. Interest expense on the junior subordinated debentures is deductible for income tax purposes.

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The Company has guaranteed the payment of distributions and payments upon liquidation or redemption of the trust preferred securities, in each case to the extent of funds held by the Trusts. The Company and the Trusts believe that, taken together, the obligations of the Company under the guarantees, the junior subordinated debentures, and other related agreements provide, in the aggregate, a full, irrevocable and unconditional guarantee, on a subordinated basis, of all of the obligations of the Trusts under the trust preferred securities. Subject to certain limitations, the Company has the right to defer the payment of interest on the junior subordinated debentures at any time, or from time to time, for a period not to exceed 20 consecutive quarters. The trust preferred securities are subject to mandatory redemption, in whole or in part, upon repayment of the junior subordinated debentures at maturity or their earlier redemption. The junior subordinated debentures are redeemable in whole or in part prior to maturity at any time after the earliest redemption dates shown in the table, and earlier at the discretion of the Company if certain conditions are met, and, in any event, only after the Company has obtained Federal Reserve Bank ("FRB") approval, if then required under applicable guidelines or regulations.

At September 30, 2018, the Company included $245.5 million of the junior subordinated debentures, net of common securities, in Tier 2 regulatory capital.

(13) Revenue from Contracts with Customers

As of January 1, 2018, the Company adopted ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606),” and all subsequent updates issued to clarify and improve specific areas of ASU 2014-09. The Company elected to adopt the new guidance using the modified retrospective approach applied to all contracts as of the date of initial application at January 1, 2018. Under the modified retrospective approach, the Company recognized no cumulative effect adjustment to the opening balance of retained earnings at the date of initial application.

Disaggregation of Revenue

As certain significant revenue sources related to financial instruments such as interest income are considered not in-scope, ASU 2014-09 did not have a significant impact on the Company's consolidated financial statements. The following table presents revenue from contracts with customers, considered in-scope under ASU 2014-09, disaggregated by the revenue source:

(Dollars in thousands)		Three Months Ended				Nine Months Ended
Revenue from contracts with customers	Location in income statement	September 30, 2018		September 30, 2017		September 30, 2018		September 30, 2017
Brokerage and insurance product commissions	Wealth management	$	5,579	$	5,127	$	17,394	$	16,796
Trust	Wealth management	3,003		2,932		9,646		9,477
Asset management	Wealth management	14,052		11,744		41,197		33,583
Total wealth management		22,634		19,803		68,237		59,856
Mortgage broker fees	Mortgage banking	295		412		862		1,142
Service charges on deposit accounts	Service charges on deposit accounts	9,331		8,645		27,339		25,606
Administrative services	Other non-interest income	1,099		1,052		3,365		3,062
Card related fees	Other non-interest income	2,328		1,471		5,583		4,315
Other deposit related fees	Other non-interest income	3,035		3,032		8,927		8,243
Total revenue from contracts with customers		$	38,722	$	34,415	$	114,313	$	102,224

Wealth Management Revenue

Wealth management revenue is comprised of brokerage and insurance product commissions, managed money fees and trust and asset management revenue of the Company's three wealth management subsidiaries: Wintrust Investments, Great Lakes Advisors, LLC ("GLA") and The Chicago Trust Company, N.A. ("CTC"). All wealth management revenue is recognized in the wealth management segment.

Brokerage and insurance product commissions consists primarily of commissions earned from trade execution services on behalf of customers and from selling mutual funds, insurance and other investment products to customers. For trade execution services, the Company recognizes commissions and receives payment from the brokerage customers at the point of transaction execution. Commissions received from the investment or insurance product providers are recognized at the point of sale of the product. The

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Company also receives trail and other commissions from providers for certain plans. These are generally based on qualifying account values and are recognized once the performance obligation, specific to each provider, is satisfied on a monthly, quarterly or annual basis.

Trust revenue is earned from trust and custody services that are generally performed over time. Revenue is determined periodically based on a schedule of fees applied to the value of each customer account using a time-elapsed method to measure progress toward complete satisfaction of the performance obligation. Fees are typically billed on a calendar month or quarter basis in advance or in arrears depending upon the contract. Additional fees earned for certain extraordinary services performed on behalf of the customers are recognized when the service has been performed.

Asset management revenue is earned from money management and advisory services that are performed over time. Revenue is based primarily on the market value of assets under management or administration using a time-elapsed method to measure progress toward complete satisfaction of the performance obligation. Fees are typically billed on a calendar month or quarter basis in advance or in arrears depending upon the contract. Certain programs provide the customer with an option of paying fees as a percentage of the account value or incurring commission charges for each trade similar to brokerage and insurance product commissions. Trade commissions and any other fees received for additional services are recognized at a point in time once the performance obligation is satisfied.

Mortgage Broker Fees

For customers desiring a mortgage product not currently offered by the Company, the Company may refer such customers and, with permission, direct such customers' applications to certain third party mortgage brokers. Mortgage broker fees are received from these brokers for such customer referrals upon settlement of the underlying mortgage. The Company's entitlement to the consideration is contingent on the settlement of the mortgage which is highly susceptible to factors outside of the Company's influence, such as third party broker's underwriting requirements. Also, the uncertainty surrounding the consideration could be resolved in varying lengths of time, dependent upon the third party brokers. Therefore, mortgage broker fees are recognized at the settlement of the underlying mortgage when the consideration is received. Broker fees are recognized in the community banking segment.

Service Charges on Deposit Accounts

Service charges on deposit accounts include fees charged to deposit customers for various services, including account analysis services, and are based on factors such as the size and type of customer, type of product and number of transactions. The fees are based on a standard schedule of fees and, depending on the nature of the service performed, the service is performed at a point in time or over a period of a month. When the service is performed at a point in time, the Company recognizes and receives revenue when the service has been performed. When the service is performed over a period of a month, the Company recognizes and receives revenue in the month the service has been performed. Service charges on deposit accounts are recognized in the community banking segment.

Administrative Services

Administrative services revenue is earned from providing outsourced administrative services, such as data processing of payrolls, billing and cash management services, to temporary staffing service clients located throughout the United States. Fees are charged periodically (typically a payroll cycle) and computed in accordance with the contractually determined rate applied to the total gross billings administered for the period. The revenue is recognized over the period using a time-elapsed method to measure progress toward complete satisfaction of the performance obligation. Other fees are charged on a per occurrence basis as the service is provided in the billing cycle. The Company has certain contracts with customers to perform outsourced administrative services and short-term accounts receivable financing. For these contracts, the total fee is allocated between the administrative services revenue and interest income during the client onboarding process based on the specific client and services provided. Administrative services revenue is recognized in the specialty finance segment.

Card and Deposit Related Fees

Card related fees include interchange and merchant revenue, and fees related to debit and credit cards. Interchange revenue is related to the Company issued debit cards. Other deposit related fees primarily include pay by phone processing fees, ATM and safe deposit box fees, check order charges and foreign currency related fees. Card and deposit related fees are generally based on volume of transactions and are recognized at the point in time when the service has been performed. For any consideration that is constrained, the revenue is recognized once the uncertainty is known. Upfront fees received from certain contracts are recognized

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on a straight line basis over the term of the contract. Card and deposit related fees are recognized in the community banking segment.

Contract Balances

The following table provides information about contract assets, contract liabilities and receivables from contracts with customers:

(Dollars in thousands)	September 30, 2018		December 31, 2017		September 30, 2017
Contract assets	$	—	$	—	$	—
Contract liabilities	$	1,429	$	1,706	$	1,799
Mortgage broker fees receivable	$	9	$	69	$	69
Administrative services receivable	2,425		—		—
Wealth management receivable	7,779		8,102		7,443
Card related fees receivable	—		202		89
Total receivables from contracts with customer	$	10,213	$	8,373	$	7,601

Contract liabilities represent upfront fees that the Company received at inception of certain contracts. The revenue recognized that was included in the contract liability balance at beginning of the period totaled $278,000 and $267,000 for the nine months ended September 30, 2018 and 2017, respectively. Receivables are recognized in the period the Company provides services when the Company's right to consideration is unconditional. Card related fee receivable is the result of volume based fee that the Company receives from a customer on an annual basis in the second quarter of each year. Payment terms on other invoiced amounts are typically 30 days or less. Contract liabilities and receivables from contracts with customers are included within the accrued interest payable and other liabilities and accrued interest receivable and other assets line items, respectively, in the Consolidated Statements of Condition.

Transaction price allocated to the remaining performance obligations

For contracts with an original expected length of more than one year, the following table presents the estimated future timing of recognition of upfront fees related to card and deposit related fees. These upfront fees represent performance obligations that are unsatisfied or partially unsatisfied at the end of the reporting period.

(Dollars in thousands)
Estimated remaining in 2018	$	92
Estimated—2019	369
Estimated—2020	369
Estimated—2021	303
Estimated—2022	153
Estimated—2023	143
Total	$	1,429

Practical Expedients and Exemptions

The Company does not adjust the promised amount of consideration for the effects of a significant financing component if the Company expects, at contract inception, that the period between when the Company transfers a promised service to a customer and when the customer pays for that services is one year or less.

The Company recognizes the incremental costs of obtaining a contract as an expense when incurred if the amortization period of the asset that the entity otherwise would have recognized is one year or less.

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(14) Segment Information

The Company’s operations consist of three primary segments: community banking, specialty finance and wealth management.

The three reportable segments are strategic business units that are separately managed as they offer different products and services and have different marketing strategies. In addition, each segment’s customer base has varying characteristics and each segment has a different regulatory environment. While the Company’s management monitors each of the fifteen bank subsidiaries’ operations and profitability separately, these subsidiaries have been aggregated into one reportable operating segment due to the similarities in products and services, customer base, operations, profitability measures, and economic characteristics.

For purposes of internal segment profitability, management allocates certain intersegment and parent company balances. Management allocates a portion of revenues to the specialty finance segment related to loans and leases originated by the specialty finance segment and sold or assigned to the community banking segment. Similarly, for purposes of analyzing the contribution from the wealth management segment, management allocates a portion of the net interest income earned by the community banking segment on deposit balances of customers of the wealth management segment to the wealth management segment. See Note 10 — Deposits, for more information on these deposits. Finally, expenses incurred at the Wintrust parent company are allocated to each segment based on each segment's risk-weighted assets.

The segment financial information provided in the following tables has been derived from the internal reporting system used by management to monitor and manage the financial performance of the Company. The accounting policies of the segments are substantially similar to those described in “Summary of Significant Accounting Policies” in Note 1 of the Company’s 2017 Form 10-K. The Company evaluates segment performance based on after-tax profit or loss and other appropriate profitability measures common to each segment.

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The following is a summary of certain operating information for reportable segments:

	Three months ended						$ Change in Contribution			% Change  in Contribution
(Dollars in thousands)	September 30, 2018			September 30, 2017
Net interest income:
Community Banking	$	202,435		$	176,526		$	25,909		15	%
Specialty Finance	36,398			30,501			5,897			19
Wealth Management	4,048			4,557			(509		)	(11	)
Total Operating Segments	242,881			211,584			31,297			15
Intersegment Eliminations	4,682			4,404			278			6
Consolidated net interest income	$	247,563		$	215,988		$	31,575		15	%
Non-interest income:
Community Banking	$	69,776		$	52,554		$	17,222		33	%
Specialty Finance	16,963			16,315			648			4
Wealth Management	23,535			20,371			3,164			16
Total Operating Segments	110,274			89,240			21,034			24
Intersegment Eliminations	(10,344		)	(9,509		)	(835		)	(9	)
Consolidated non-interest income	$	99,930		$	79,731		$	20,199		25	%
Net revenue:
Community Banking	$	272,211		$	229,080		$	43,131		19	%
Specialty Finance	53,361			46,816			6,545			14
Wealth Management	27,583			24,928			2,655			11
Total Operating Segments	353,155			300,824			52,331			17
Intersegment Eliminations	(5,662		)	(5,105		)	(557		)	(11	)
Consolidated net revenue	$	347,493		$	295,719		$	51,774		18	%
Segment profit:
Community Banking	$	63,735		$	44,799		$	18,936		42	%
Specialty Finance	22,971			17,043			5,928			35
Wealth Management	5,242			3,784			1,458			39
Consolidated net income	$	91,948		$	65,626		$	26,322		40	%
Segment assets:
Community Banking	$	24,590,027		$	22,426,049		$	2,163,978		10	%
Specialty Finance	4,897,664			4,305,960			591,704			14
Wealth Management	655,040			626,153			28,887			5
Consolidated total assets	$	30,142,731		$	27,358,162		$	2,784,569		10	%

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	Nine months ended						$ Change in Contribution			% Change  in Contribution
(Dollars in thousands)	September 30, 2018			September 30, 2017
Net interest income:
Community Banking	$	583,926		$	499,135		$	84,791		17	%
Specialty Finance	100,104			85,871			14,233			17
Wealth Management	12,729			14,532			(1,803		)	(12	)
Total Operating Segments	696,759			599,538			97,221			16
Intersegment Eliminations	14,056			13,439			617			5
Consolidated net interest income	$	710,815		$	612,977		$	97,838		16	%
Non-interest income:
Community Banking	$	192,028		$	160,277		$	31,751		20	%
Specialty Finance	49,005			44,192			4,813			11
Wealth Management	69,789			61,746			8,043			13
Total Operating Segments	310,822			266,215			44,607			17
Intersegment Eliminations	(29,980		)	(27,747		)	(2,233		)	(8	)
Consolidated non-interest income	$	280,842		$	238,468		$	42,374		18	%
Net revenue:
Community Banking	$	775,954		$	659,412		$	116,542		18	%
Specialty Finance	149,109			130,063			19,046			15
Wealth Management	82,518			76,278			6,240			8
Total Operating Segments	1,007,581			865,753			141,828			16
Intersegment Eliminations	(15,924		)	(14,308		)	(1,616		)	(11	)
Consolidated net revenue	$	991,657		$	851,445		$	140,212		16	%
Segment profit:
Community Banking	$	187,395		$	128,502		$	58,893		46	%
Specialty Finance	61,482			47,990			13,492			28
Wealth Management	14,632			12,409			2,223			18
Consolidated net income	$	263,509		$	188,901		$	74,608		39	%

(15) Derivative Financial Instruments

The Company primarily enters into derivative financial instruments as part of its strategy to manage its exposure to changes in interest rates. Derivative instruments represent contracts between parties that result in one party delivering cash to the other party based on a notional amount and an underlying term (such as a rate, security price or price index) as specified in the contract. The amount of cash delivered from one party to the other is determined based on the interaction of the notional amount of the contract with the underlying term. Derivatives are also implicit in certain contracts and commitments.

The derivative financial instruments currently used by the Company to manage its exposure to interest rate risk include: (1) interest rate swaps to manage the interest rate risk of certain fixed and variable rate assets and variable rate liabilities; (2) interest rate lock commitments provided to customers to fund certain mortgage loans to be sold into the secondary market; (3) forward commitments for the future delivery of such mortgage loans to protect the Company from adverse changes in interest rates and corresponding changes in the value of mortgage loans held-for-sale; and (4) covered call options to economically hedge specific investment securities and receive fee income effectively enhancing the overall yield on such securities to compensate for net interest margin compression. The Company also enters into derivatives (typically interest rate swaps) with certain qualified borrowers to facilitate the borrowers’ risk management strategies and concurrently enters into mirror-image derivatives with a third party counterparty, effectively making a market in the derivatives for such borrowers. Additionally, the Company enters into foreign currency contracts to manage foreign exchange risk associated with certain foreign currency denominated assets.

The Company recognizes derivative financial instruments in the consolidated financial statements at fair value regardless of the purpose or intent for holding the instrument. The Company records derivative assets and derivative liabilities on the Consolidated Statements of Condition within accrued interest receivable and other assets and accrued interest payable and other liabilities, respectively. Changes in the fair value of derivative financial instruments are either recognized in income or in shareholders’ equity as a component of other comprehensive income depending on whether the derivative financial instrument qualifies for hedge accounting and, if so, whether it qualifies as a fair value hedge or cash flow hedge.

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As of January 1, 2018, the Company elected to early adopt ASU No. 2017-12, “Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities.” Generally, changes in fair values of derivatives accounted for as fair value hedges are recorded in income in the same period and in the same income statement line as changes in the fair values of the hedged items that relate to the hedged risk(s). Changes in fair values of derivative financial instruments accounted for as cash flow hedges are recorded as a component of other comprehensive income, net of deferred taxes, and reclassified to earnings when the hedged transaction affects earnings. Changes in fair values of derivative financial instruments not designated in a hedging relationship pursuant to ASC 815 are reported in non-interest income during the period of the change. Derivative financial instruments are valued by a third party and are corroborated by comparison with valuations provided by the respective counterparties. Fair values of certain mortgage banking derivatives (interest rate lock commitments and forward commitments to sell mortgage loans) are estimated based on changes in mortgage interest rates from the date of the loan commitment. The fair value of foreign currency derivatives is computed based on changes in foreign currency rates stated in the contract compared to those prevailing at the measurement date.

The table below presents the fair value of the Company’s derivative financial instruments as of September 30, 2018, December 31, 2017 and September 30, 2017:

	Derivative Assets						Derivative Liabilities
(Dollars in thousands)	September 30, 2018		December 31, 2017		September 30, 2017		September 30, 2018		December 31, 2017		September 30, 2017
Derivatives designated as hedging instruments under ASC 815:
Interest rate derivatives designated as Cash Flow Hedges	$	16,271	$	11,914	$	8,643	$	—	$	12	$	—
Interest rate derivatives designated as Fair Value Hedges	5,126		2,932		2,036		—		—		53
Total derivatives designated as hedging instruments under ASC 815	$	21,397	$	14,846	$	10,679	$	—	$	12	$	53
Derivatives not designated as hedging instruments under ASC 815:
Interest rate derivatives	$	69,865	$	34,139	$	34,489	$	69,342	$	33,704	$	33,982
Interest rate lock commitments	4,128		2,843		2,851		—		269		1
Forward commitments to sell mortgage loans	12		14		19		1,330		1,457		1,495
Foreign exchange contracts	751		227		160		709		229		242
Total derivatives not designated as hedging instruments under ASC 815	$	74,756	$	37,223	$	37,519	$	71,381	$	35,659	$	35,720
Total Derivatives	$	96,153	$	52,069	$	48,198	$	71,381	$	35,671	$	35,773

Cash Flow Hedges of Interest Rate Risk

The Company’s objectives in using interest rate derivatives are to add stability to net interest income and to manage its exposure to interest rate movements. To accomplish these objectives, the Company primarily uses interest rate swaps as part of its interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the receipt of variable-rate amounts from a counterparty in exchange for the Company making fixed-rate payments over the life of the agreements without the exchange of the underlying notional amount. Interest rate collars designated as cash flow hedges involve the receipt of amounts in which the interest rate specified in the contract exceeds the agreed upon cap strike price or the payment of amounts in which the interest rate specified in the contract is below the agreed upon floor strike price at the end of each period.

As of September 30, 2018, the Company had eight interest rate swap derivatives designated as cash flow hedges of variable rate deposits and one interest rate collar derivative designated as a cash flow hedge of variable rate debt. When the relationship between the hedged item and hedging instrument is highly effective at achieving offsetting changes in cash flows attributable to the hedged risk, changes in the fair value of these cash flow hedges are recorded in accumulated other comprehensive income and are subsequently reclassified to interest expense as interest payments are made on such variable rate deposits. The changes in fair value (net of tax) are separately disclosed in the Consolidated Statements of Comprehensive Income.

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The table below provides details on each of these cash flow hedges as of September 30, 2018:

	September 30, 2018
(Dollars in thousands)	Notional		Fair Value
Maturity Date	Amount		Asset (Liability)
Interest Rate Swaps:
June 2019	$	200,000	$	1,445
July 2019	250,000		3,275
August 2019	275,000		4,399
January 2020	175,000		1,554
January 2020	25,000		222
April 2020	50,000		317
April 2020	200,000		1,267
June 2020	200,000		3,741
Interest Rate Collars:
September 2023	150,000		51
Total Cash Flow Hedges	$	1,525,000	$	16,271

A rollforward of the amounts in accumulated other comprehensive loss related to interest rate derivatives designated as cash flow hedges follows:

	Three months ended					Nine months ended
(Dollars in thousands)	September 30, 2018			September 30, 2017		September 30, 2018			September 30, 2017
Unrealized gain at beginning of period	$	16,059		$	8,249	$	11,902		$	6,944
Amount reclassified from accumulated other comprehensive loss to interest expense on deposits and junior subordinated debentures	(2,319		)	14		(4,338		)	1,051
Amount of gain recognized in other comprehensive income	2,531			380		8,707			648
Unrealized gain at end of period	$	16,271		$	8,643	$	16,271		$	8,643

As of September 30, 2018, the Company estimates that during the next twelve months $14.2 million will be reclassified from accumulated other comprehensive gain (loss) as a reduction to interest expense.

Fair Value Hedges of Interest Rate Risk

Interest rate swaps designated as fair value hedges involve the payment of fixed amounts to a counterparty in exchange for the Company receiving variable payments over the life of the agreements without the exchange of the underlying notional amount. As of September 30, 2018, the Company has twelve interest rate swaps with an aggregate notional amount of $164.2 million that were designated as fair value hedges associated with fixed rate commercial and industrial and commercial franchise loans as well as life insurance premium finance receivables. Two of these interest rate swaps with an aggregate notional amount of $55.3 million were effective starting after September 30, 2018.

For derivatives designated and that qualify as fair value hedges, the net gain or loss from the entire change in the fair value of the derivative instrument is recognized in the same income statement line item as the earnings effect, including the net gain or loss, of the hedged item (interest income earned on fixed rate loans) when the hedged item affects earnings.

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The following table presents the carrying amount of the hedged assets/(liabilities) and the cumulative amount of fair value hedging adjustment included in the carrying amount of the hedged assets/(liabilities) that are designated as a fair value hedge accounting relationship as of September 30, 2018:

		September 30, 2018
(Dollars in thousands) Derivatives in Fair Value Hedging Relationships	Location in the Statement of Condition	Carrying Amount of the Hedged Assets/(Liabilities)		Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities)			Cumulative Amount of Fair Value Hedging Adjustment Remaining for any Hedged Assets (Liabilities) for which Hedge Accounting has been Discontinued
Interest rate swaps	Loans, net of unearned income, excluding covered loans	$	129,496	$	(5,082	)	$	—

The following table presents the loss or gain recognized related to derivative instruments that are designated as fair value hedges for the respective periods:

(Dollars in thousands) Derivatives in Fair Value Hedging Relationships	Location of (Loss)/Gain Recognized in Income on Derivative	Three Months Ended			Nine Months Ended
		September 30, 2018			September 30, 2018
Interest rate swaps	Interest and fees on loans	$	(25	)	$	(55	)

During the three months ended September 30, 2018, one interest rate swap designated as a fair value hedge accounting relationship was terminated as a result of the full prepayment of the underlying loan (hedged asset). At the time of the termination, the fair value of the interest rate swap asset was approximately $1.4 million with an offsetting cumulative amount of fair value hedging adjustments included in the carrying value of the underlying loan totaling $1.6 million. As the underlying loan was fully paid-off, the remaining cumulative amount of fair value hedging adjustments included in the carrying value of the underlying loan was recorded to interest income.

Non-Designated Hedges

The Company does not use derivatives for speculative purposes. Derivatives not designated as accounting hedges are used to manage the Company’s economic exposure to interest rate movements and other identified risks but do not meet the strict hedge accounting requirements of ASC 815. Changes in the fair value of derivatives not designated in hedging relationships are recorded directly in earnings.

Interest Rate Derivatives—The Company has interest rate derivatives, including swaps and option products, resulting from a service the Company provides to certain qualified borrowers. The Company’s banking subsidiaries execute certain derivative products (typically interest rate swaps) directly with qualified commercial borrowers to facilitate their respective risk management strategies. For example, these arrangements allow the Company’s commercial borrowers to effectively convert a variable rate loan to a fixed rate. In order to minimize the Company’s exposure on these transactions, the Company simultaneously executes offsetting derivatives with third parties. In most cases, the offsetting derivatives have mirror-image terms, which result in the positions’ changes in fair value substantially offsetting through earnings each period. However, to the extent that the derivatives are not a mirror-image and because of differences in counterparty credit risk, changes in fair value will not completely offset resulting in some earnings impact each period. Changes in the fair value of these derivatives are included in other non-interest income. At September 30, 2018, the Company had interest rate derivative transactions with an aggregate notional amount of approximately $6.1 billion (all interest rate swaps and caps with customers and third parties) related to this program. These interest rate derivatives had maturity dates ranging from October 2018 to February 2045.

Mortgage Banking Derivatives—These derivatives include interest rate lock commitments provided to customers to fund certain mortgage loans to be sold into the secondary market and forward commitments for the future delivery of such loans. It is the Company’s practice to enter into forward commitments for the future delivery of a portion of our residential mortgage loan production when interest rate lock commitments are entered into in order to economically hedge the effect of future changes in interest rates on its commitments to fund the loans as well as on its portfolio of mortgage loans held-for-sale. The Company’s mortgage banking derivatives have not been designated as being in hedge relationships. At September 30, 2018, the Company had forward commitments to sell mortgage loans with an aggregate notional amount of approximately $698.2 million and interest rate lock commitments with an aggregate notional amount of approximately $379.5 million. The fair values of these derivatives were estimated based on changes in mortgage rates from the dates of the commitments. Changes in the fair value of these mortgage banking derivatives are included in mortgage banking revenue.

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Foreign Currency Derivatives—These derivatives include foreign currency contracts used to manage the foreign exchange risk associated with foreign currency denominated assets and transactions. Foreign currency contracts, which include spot and forward contracts, represent agreements to exchange the currency of one country for the currency of another country at an agreed-upon price on an agreed-upon settlement date. As a result of fluctuations in foreign currencies, the U.S. dollar-equivalent value of the foreign currency denominated assets or forecasted transactions increase or decrease. Gains or losses on the derivative instruments related to these foreign currency denominated assets or forecasted transactions are expected to substantially offset this variability. As of September 30, 2018 the Company held foreign currency derivatives with an aggregate notional amount of approximately $37.9 million.

Other Derivatives—Periodically, the Company will sell options to a bank or dealer for the right to purchase certain securities held within the banks’ investment portfolios (covered call options). These option transactions are designed primarily to mitigate overall interest rate risk and to increase the total return associated with the investment securities portfolio. These options do not qualify as accounting hedges pursuant to ASC 815, and, accordingly, changes in fair value of these contracts are recognized as other non-interest income. There were no covered call options outstanding as of September 30, 2018, December 31, 2017 or September 30, 2017.

Amounts included in the Consolidated Statements of Income related to derivative instruments not designated in hedge relationships were as follows:

(Dollars in thousands)		Three Months Ended						Nine Months Ended
Derivative	Location in income statement	September 30, 2018			September 30, 2017			September 30, 2018		September 30, 2017
Interest rate swaps and caps	Trading (losses) gains, net	$	(55	)	$	(94	)	$	89	$	(762	)
Mortgage banking derivatives	Mortgage banking revenue	(1,122		)	708			858		1,398
Covered call options	Fees from covered call options	627			1,143			2,893		2,792
Foreign exchange contracts	Trading (losses) gains, net	(18		)	(23		)	51		(115		)

Credit Risk

Derivative instruments have inherent risks, primarily market risk and credit risk. Market risk is associated with changes in interest rates and credit risk relates to the risk that the counterparty will fail to perform according to the terms of the agreement. The amounts potentially subject to market and credit risks are the streams of interest payments under the contracts and the market value of the derivative instrument and not the notional principal amounts used to express the volume of the transactions. Market and credit risks are managed and monitored as part of the Company's overall asset-liability management process, except that the credit risk related to derivatives entered into with certain qualified borrowers is managed through the Company's standard loan underwriting process since these derivatives are secured through collateral provided by the loan agreements. Actual exposures are monitored against various types of credit limits established to contain risk within parameters. When deemed necessary, appropriate types and amounts of collateral are obtained to minimize credit exposure.

The Company has agreements with certain of its interest rate derivative counterparties that contain cross-default provisions, which provide that if the Company defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then the Company could also be declared in default on its derivative obligations. The Company also has agreements with certain of its derivative counterparties that contain a provision allowing the counterparty to terminate the derivative positions if the Company fails to maintain its status as a well or adequately capitalized institution, which would require the Company to settle its obligations under the agreements. As of September 30, 2018, the fair value of interest rate derivatives in a net liability position that were subject to such agreements, which includes accrued interest related to these agreements, was $162,000. If the Company had breached any of these provisions and the derivatives were terminated as a result, the Company would have been required to settle its obligations under the agreements at the termination value and would have been required to pay any additional amounts due in excess of amounts previously posted as collateral with the respective counterparty.

The Company is also exposed to the credit risk of its commercial borrowers who are counterparties to interest rate derivatives with the banks. This counterparty risk related to the commercial borrowers is managed and monitored through the banks' standard underwriting process applicable to loans since these derivatives are secured through collateral provided by the loan agreement. The counterparty risk associated with the mirror-image swaps executed with third parties is monitored and managed in connection with the Company's overall asset liability management process.

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The Company records interest rate derivatives subject to master netting agreements at their gross value and does not offset derivative assets and liabilities on the Consolidated Statements of Condition. The tables below summarize the Company's interest rate derivatives and offsetting positions as of the dates shown.

	Derivative Assets									Derivative Liabilities
	Fair Value									Fair Value
(Dollars in thousands)	September 30, 2018			December 31, 2017			September 30, 2017			September 30, 2018			December 31, 2017			September 30, 2017
Gross Amounts Recognized	$	91,262		$	48,985		$	45,168		$	69,342		$	33,716		$	34,035
Less: Amounts offset in the Statements of Financial Condition	—			—			—			—			—			—
Net amount presented in the Statements of Financial Condition	$	91,262		$	48,985		$	45,168		$	69,342		$	33,716		$	34,035
Gross amounts not offset in the Statements of Financial Condition
Offsetting Derivative Positions	$	(7,887	)	(14,878		)	(16,213		)	$	(7,887	)	(14,878		)	(16,213		)
Collateral Posted	(76,530		)	(18,060		)	(2,950		)	(340		)	(2,220		)	(17,130		)
Net Credit Exposure	$	6,845		$	16,047		$	26,005		$	61,115		$	16,618		$	692

(16) Fair Values of Assets and Liabilities

The Company measures, monitors and discloses certain of its assets and liabilities on a fair value basis. These financial assets and financial liabilities are measured at fair value in three levels, based on the markets in which the assets and liabilities are traded and the observability of the inputs used to determine fair value. These levels are:

• Level 1—unadjusted quoted prices in active markets for identical assets or liabilities.

• Level 2—inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability or inputs that are derived principally from or corroborated by observable market data by correlation or other means.

• Level 3—significant unobservable inputs that reflect the Company’s own assumptions that market participants would use in pricing the assets or liabilities. Level 3 assets and liabilities include financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation.

A financial instrument’s categorization within the above valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the assets or liabilities. The following is a description of the valuation methodologies used for the Company’s assets and liabilities measured at fair value on a recurring basis.

Available-for-sale securities, trading account securities and equity securities with readily determinable fair value—Fair values for available-for-sale securities, trading account securities and equity securities with readily determinable fair value are typically based on prices obtained from independent pricing vendors. Securities measured with these valuation techniques are generally classified as Level 2 of the fair value hierarchy. Typically, standard inputs such as benchmark yields, reported trades for similar securities, issuer spreads, benchmark securities, bids, offers and reference data including market research publications are used to fair value a security. When these inputs are not available, broker/dealer quotes may be obtained by the vendor to determine the fair value of the security. We review the vendor’s pricing methodologies to determine if observable market information is being used, versus unobservable inputs. Fair value measurements using significant inputs that are unobservable in the market due to limited activity or a less liquid market are classified as Level 3 in the fair value hierarchy.

The Company’s Investment Operations Department is responsible for the valuation of Level 3 available-for-sale securities. The methodology and variables used as inputs in pricing Level 3 securities are derived from a combination of observable and unobservable inputs. The unobservable inputs are determined through internal assumptions that may vary from period to period due to external factors, such as market movement and credit rating adjustments.

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At September 30, 2018, the Company classified $97.6 million of municipal securities as Level 3. These municipal securities are bond issues for various municipal government entities primarily located in the Chicago metropolitan area and southern Wisconsin and are privately placed, non-rated bonds without CUSIP numbers. The Company also classified $3.3 million of U.S. government agencies as Level 3 at September 30, 2018. The Company’s methodology for pricing these securities focuses on three distinct inputs: equivalent rating, yield and other pricing terms. To determine the rating for a given non-rated municipal bond, the Investment Operations Department references a rated, publicly issued bond by the same issuer if available. A reduction is then applied to the rating obtained from the comparable bond, as the Company believes if liquidated, a non-rated bond would be valued less than a similar bond with a verifiable rating. The reduction applied by the Company is one complete rating grade (i.e. a “AA” rating for a comparable bond would be reduced to “A” for the Company’s valuation). For bond issues without comparable bond proxies, a rating of "BBB" was assigned. In the third quarter of 2018, all of the ratings derived by the Investment Operations Department using the above process were "BBB" or better. The fair value measurement of municipal bonds is sensitive to the rating input, as a higher rating typically results in an increased valuation. The remaining pricing inputs used in the bond valuation are observable. Based on the rating determined in the above process, Investment Operations obtains a corresponding current market yield curve available to market participants. Other terms including coupon, maturity date, redemption price, number of coupon payments per year, and accrual method are obtained from the individual bond term sheets. Certain municipal bonds held by the Company at September 30, 2018 are continuously callable. When valuing these bonds, the fair value is capped at par value as the Company assumes a market participant would not pay more than par for a continuously callable bond. To determine the rating for the U.S. government agency securities, the Investment Operations Department assigned a AAA rating as it is guaranteed by the U.S. government.

Mortgage loans held-for-sale—The fair value of mortgage loans held-for-sale is determined by reference to investor price sheets for loan products with similar characteristics.

Loans held-for-investment—The fair value for loans in which the Company elected the fair value option is estimated by discounting future scheduled cash flows for the specific loan through maturity, adjusted for estimated credit losses and prepayments. The Company uses a discount rate based on the actual coupon rate of the underlying loan. At September 30, 2018, the Company classified $13.5 million of loans held-for-investment as Level 3. The weighted average discount rate used as an input to value these loans at September 30, 2018 was 4.57% with discount rates applied ranging from 4%-5%. The higher the rate utilized to discount estimated future cash flows, the lower the fair value measurement. As noted above, the fair value estimate also includes assumptions of prepayment speeds and credit losses. The Company included a prepayments speed assumption of 10.31% at September 30, 2018. Prepayment speeds are inversely related to the fair value of these loans as an increase in prepayment speeds results in a decreased valuation. Additionally, the weighted average credit discount used as an input to value the specific loans was 1.00% with credit loss discount ranging from 0%-7% at September 30, 2018.

MSRs—Fair value for MSRs is determined utilizing a valuation model which calculates the fair value of each servicing rights based on the present value of estimated future cash flows. The Company uses a discount rate commensurate with the risk associated with each servicing rights, given current market conditions. At September 30, 2018, the Company classified $74.5 million of MSRs as Level 3. The weighted average discount rate used as an input to value the pool of MSRs at September 30, 2018 was 10.03% with discount rates applied ranging from 7%-18%. The higher the rate utilized to discount estimated future cash flows, the lower the fair value measurement. The fair value of MSRs was also estimated based on other assumptions including prepayment speeds and the cost to service. Prepayment speeds used as an input to value the MSRs at September 30, 2018 ranged from 0%-81% or a weighted average prepayment speed of 10.03%. Further, for current and delinquent loans, the Company assumed a weighted average cost of servicing of $78 and $274, respectively, per loan. Prepayment speeds and the cost to service are both inversely related to the fair value of MSRs as an increase in prepayment speeds or the cost to service results in a decreased valuation. See Note 9 - Mortgage Servicing Rights (“MSRs”) for further discussion of MSRs.

Derivative instruments—The Company’s derivative instruments include interest rate swaps, caps and collars, commitments to fund mortgages for sale into the secondary market (interest rate locks), forward commitments to end investors for the sale of mortgage loans and foreign currency contracts. Interest rate swaps, caps and collars are valued by a third party, using models that primarily use market observable inputs, such as yield curves, and are validated by comparison with valuations provided by the respective counterparties. The credit risk associated with derivative financial instruments that are subject to master netting agreements is measured on a net basis by counterparty portfolio. The fair value for mortgage-related derivatives is based on changes in mortgage rates from the date of the commitments. The fair value of foreign currency derivatives is computed based on change in foreign currency rates stated in the contract compared to those prevailing at the measurement date.

At September 30, 2018, the Company classified $2.5 million of derivative assets related to interest rate locks as Level 3. The fair value of interest rate locks is based on prices obtained for loans with similar characteristics from third parties, adjusted for the pull-through rate, which represents the Company’s best estimate of the likelihood that a committed loan will ultimately fund. The weighted-average pull-through rate at September 30, 2018 was 91.12% with pull-through rates applied ranging from 20% to 100%.

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Pull-through rates are directly related to the fair value of interest rate locks as an increase in the pull-through rate results in an increased valuation.

Nonqualified deferred compensation assets—The underlying assets relating to the nonqualified deferred compensation plan are included in a trust and primarily consist of non-exchange traded institutional funds which are priced based by an independent third party service.

The following tables present the balances of assets and liabilities measured at fair value on a recurring basis for the periods presented:

	September 30, 2018
(Dollars in thousands)	Total		Level 1		Level 2		Level 3
Available-for-sale securities
U.S. Treasury	$	124,761	$	—	$	124,761	$	—
U.S. Government agencies	111,020		—		107,705		3,315
Municipal	133,373		—		35,787		97,586
Corporate notes	93,453		—		93,453		—
Mortgage-backed	1,702,378		—		1,702,378		—
Trading account securities	688		—		688		—
Equity securities with readily determinable fair value	36,414		—		36,414		—
Mortgage loans held-for-sale	338,111		—		338,111		—
Loans held-for-investment	77,883		—		64,427		13,456
MSRs	74,530		—		—		74,530
Nonqualified deferred compensation assets	12,503		—		12,503		—
Derivative assets	96,153		—		93,661		2,492
Total	$	2,801,267	$	—	$	2,609,888	$	191,379
Derivative liabilities	$	71,381	$	—	$	71,381	$	—

	December 31, 2017
(Dollars in thousands)	Total		Level 1		Level 2		Level 3
Available-for-sale securities
U.S. Treasury	$	143,822	$	—	$	143,822	$	—
U.S. Government agencies	156,915		—		153,136		3,779
Municipal	115,352		—		38,171		77,181
Corporate notes	31,050		—		31,050		—
Mortgage-backed	1,319,725		—		1,319,725		—
Equity securities	36,802		—		36,802		—
Trading account securities	995		—		995		—
Mortgage loans held-for-sale	313,592		—		313,592		—
Loans held-for-investment	33,717		—		—		33,717
MSRs	33,676		—		—		33,676
Nonqualified deferred compensation assets	11,065		—		11,065		—
Derivative assets	52,069		—		49,912		2,157
Total	$	2,248,780	$	—	$	2,098,270	$	150,510
Derivative liabilities	$	35,671	$	—	$	35,671	$	—

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	September 30, 2017
(Dollars in thousands)	Total		Level 1		Level 2		Level 3
Available-for-sale securities
U.S. Treasury	$	144,145	$	—	$	144,145	$	—
U.S. Government agencies	159,328		—		155,385		3,943
Municipal	116,016		—		47,633		68,383
Corporate notes	60,614		—		60,614		—
Mortgage-backed	1,149,448		—		1,149,448		—
Equity securities	36,352		—		36,352		—
Trading account securities	643		—		643		—
Mortgage loans held-for-sale	370,282		—		370,282		—
Loans held-for-investment	29,704		—		—		29,704
MSRs	29,414		—		—		29,414
Nonqualified deferred compensation assets	10,824		—		10,824		—
Derivative assets	48,198		—		46,982		1,216
Total	$	2,154,968	$	—	$	2,022,308	$	132,660
Derivative liabilities	$	35,773	$	—	$	35,773	$	—

The aggregate remaining contractual principal balance outstanding as of September 30, 2018, December 31, 2017 and September 30, 2017 for mortgage loans held-for-sale measured at fair value under ASC 825 was $317.4 million, $299.5 million and $356.4 million, respectively, while the aggregate fair value of mortgage loans held-for-sale was $338.1 million, $313.6 million and $370.3 million, for the same respective periods, as shown in the above tables. There were $622,000 of loans past due greater than 90 days and still accruing in the mortgage loans held-for-sale portfolio as of September 30, 2018 and no loans as of December 31, 2017 and September 30, 2017.

The changes in Level 3 assets measured at fair value on a recurring basis during the three and nine months ended September 30, 2018 and 2017 are summarized as follows:

				U.S. Government Agencies			Loans held-for- investment			Mortgage servicing rights		Derivative Assets
(Dollars in thousands)	Municipal
Balance at July 1, 2018	$	96,566		$	3,482		$	13,764		$	63,194	$	3,819
Total net gains (losses) included in:
Net income (1)	—			—			(32		)	11,336		(1,327		)
Other comprehensive loss	(2,573		)	(9		)	—			—		—
Purchases	4,830			—			—			—		—
Issuances	—			—			—			—		—
Sales	—			—			—			—		—
Settlements	(1,237		)	(158		)	(1,520		)	—		—
Net transfers into/(out of) Level 3	—			—			1,244			—		—
Balance at September 30, 2018	$	97,586		$	3,315		$	13,456		$	74,530	$	2,492

(1) Changes in the balance of MSRs and derivative assets related to fair value adjustments are recorded as components of mortgage banking revenue. Changes in the balance of loans held-for-investment related to fair value adjustments are recorded as other non-interest income.

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				U.S. Government Agencies			Loans held-for- investment			Mortgage servicing rights		Derivative Assets
(Dollars in thousands)	Municipal
Balance at January 1, 2018	$	77,181		$	3,779		$	33,717		$	33,676	$	2,157
Total net gains (losses) included in:
Net income (1)	—			—			(1,420		)	27,048		335
Other comprehensive loss	(5,658		)	(306		)	—			—		—
Purchases (2)	31,846			—			—			13,806		—
Issuances	—			—			—			—		—
Sales	—			—			—			—		—
Settlements	(5,783		)	(158		)	(24,177		)	—		—
Net transfers into/(out of) Level 3	—			—			5,336			—		—
Balance at September 30, 2018	$	97,586		$	3,315		$	13,456		$	74,530	$	2,492

				U.S. Government Agencies			Loans held-for- investment			Mortgage servicing rights		Derivative Assets
(Dollars in thousands)	Municipal
Balance at July 1, 2017	$	77,341		$	4,110		$	30,173		$	27,307	$	1,047
Total net gains (losses) included in:
Net income (1)	—			—			177			2,107		169
Other comprehensive income (loss)	(4,113		)	(167		)	—			—		—
Purchases	—			—			—			—		—
Issuances	—			—			—			—		—
Sales	—			—			—			—		—
Settlements	(4,845		)	—			(4,504		)	—		—
Net transfers into/(out of) Level 3	—			—			3,858			—		—
Balance at September 30, 2017	$	68,383		$	3,943		$	29,704		$	29,414	$	1,216

				U.S. Government Agencies			Loans held-for- investment			Mortgage servicing rights		Derivative Assets
(Dollars in thousands)	Municipal
Balance at January 1, 2017	$	79,626		$	—		$	22,137		$	19,103	$	2,291
Total net gains (losses) included in:
Net income (1)	—			—			1,369			10,311		(1,075		)
Other comprehensive income (loss)	(1,084		)	(340		)	—			—		—
Purchases	10,879			—			—			—		—
Issuances	—			—			—			—		—
Sales	—			—			—			—		—
Settlements	(21,038		)	—			(9,995		)	—		—
Net transfers into/(out of) Level 3	—			4,283			16,193			—		—
Balance at September 30, 2017	$	68,383		$	3,943		$	29,704		$	29,414	$	1,216

(1) Changes in the balance of MSRs and derivative assets related to fair value adjustments are recorded as components of mortgage banking revenue. Changes in the balance of loans held-for-investment related to fair value adjustments are recorded as other non-interest income.

(2) Purchased as a part of the Veterans First business combination. See Note 3 - Business Combinations for further discussion.

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Also, the Company may be required, from time to time, to measure certain other financial assets at fair value on a nonrecurring basis in accordance with GAAP. These adjustments to fair value usually result from impairment charges on individual assets. For assets measured at fair value on a nonrecurring basis that were still held in the balance sheet at the end of the period, the following table provides the carrying value of the related individual assets or portfolios at September 30, 2018.

	September 30, 2018								Three Months Ended September 30, 2018 Fair Value Losses Recognized, net		Nine Months Ended September 30, 2018 Fair Value Losses Recognized, net
(Dollars in thousands)	Total		Level 1		Level 2		Level 3
Impaired loans—collateral based	$	106,219	$	—	$	—	$	106,219	$	3,978	$	11,152
Other real estate owned (1)	28,303		—		—		28,303		1,504		5,173
Total	$	134,522	$	—	$	—	$	134,522	$	5,482	$	16,325

(1) Fair value losses recognized, net on other real estate owned include valuation adjustments and charge-offs during the respective period.

Impaired loans—A loan is considered to be impaired when, based on current information and events, it is probable that the Company will be unable to collect all amounts due pursuant to the contractual terms of the loan agreement. A loan modified in a TDR is an impaired loan according to applicable accounting guidance. Impairment is measured by estimating the fair value of the loan based on the present value of expected cash flows, the market price of the loan, or the fair value of the underlying collateral. Impaired loans are considered a fair value measurement where an allowance is established based on the fair value of collateral. Appraised values, which may require adjustments to market-based valuation inputs, are generally used on real estate collateral-dependent impaired loans.

The Company’s Managed Assets Division is primarily responsible for the valuation of Level 3 inputs of impaired loans. For more information on the Managed Assets Division review of impaired loans refer to Note 7 – Allowance for Loan Losses, Allowance for Losses on Lending-Related Commitments and Impaired Loans. At September 30, 2018, the Company had $132.5 million of impaired loans classified as Level 3. Of the $132.5 million of impaired loans, $106.2 million were measured at fair value based on the underlying collateral of the loan as shown in the table above. The remaining $26.3 million were valued based on discounted cash flows in accordance with ASC 310.

Other real estate owned —Other real estate owned is comprised of real estate acquired in partial or full satisfaction of loans and is included in other assets. Other real estate owned is recorded at its estimated fair value less estimated selling costs at the date of transfer, with any excess of the related loan balance over the fair value less expected selling costs charged to the allowance for loan losses. Subsequent changes in value are reported as adjustments to the carrying amount and are recorded in other non-interest expense. Gains and losses upon sale, if any, are also charged to other non-interest expense. Fair value is generally based on third party appraisals and internal estimates that are adjusted by a discount representing the estimated cost of sale and is therefore considered a Level 3 valuation.

The Company’s Managed Assets Division is primarily responsible for the valuation of Level 3 inputs for other real estate owned. At September 30, 2018, the Company had $28.3 million of other real estate owned classified as Level 3. The unobservable input applied to other real estate owned relates to the 10% reduction to the appraisal value representing the estimated cost of sale of the foreclosed property. A higher discount for the estimated cost of sale results in a decreased carrying value.

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The valuation techniques and significant unobservable inputs used to measure both recurring and non-recurring Level 3 fair value measurements at September 30, 2018 were as follows:

(Dollars in thousands)	Fair Value		Valuation Methodology	Significant Unobservable Input	Range of Inputs	Weighted Average of Inputs	Impact to valuation from an increased or higher input value
Measured at fair value on a recurring basis:
Municipal Securities	$	97,586	Bond pricing	Equivalent rating	BBB-AA+	N/A	Increase
U.S. Government agencies	3,315		Bond pricing	Equivalent rating	AAA	AAA	Increase
Loans held-for-investment	13,456		Discounted cash flows	Discount rate	4%-5%	4.57%	Decrease
				Credit discount	0%-7%	1.00%	Decrease
				Constant prepayment rate (CPR)	10.31%	10.31%	Decrease
MSRs	74,530		Discounted cash flows	Discount rate	7%-18%	10.03%	Decrease
				Constant prepayment rate (CPR)	0%-81%	10.03%	Decrease
				Cost of servicing	$15-$200	$78	Decrease
				Cost of servicing - delinquent	$200-$1,000	$274	Decrease
Derivatives	2,492		Discounted cash flows	Pull-through rate	20%-100%	91.12%	Increase
Measured at fair value on a non-recurring basis:
Impaired loans—collateral based	$	106,219	Appraisal value	Appraisal adjustment - cost of sale	10%	10.00%	Decrease
Other real estate owned	28,303		Appraisal value	Appraisal adjustment - cost of sale	10%	10.00%	Decrease

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The Company is required under applicable accounting guidance to report the fair value of all financial instruments on the consolidated statements of condition, including those financial instruments carried at cost. The table below presents the carrying amounts and estimated fair values of the Company’s financial instruments as of the dates shown:

	At September 30, 2018				At December 31, 2017				At September 30, 2017
	Carrying		Fair		Carrying		Fair		Carrying		Fair
(Dollars in thousands)	Value		Value		Value		Value		Value		Value
Financial Assets:
Cash and cash equivalents	$	279,993	$	279,993	$	277,591	$	277,591	$	251,952	$	251,952
Interest bearing deposits with banks	1,137,044		1,137,044		1,063,242		1,063,242		1,218,728		1,218,728
Available-for-sale securities	2,164,985		2,164,985		1,803,666		1,803,666		1,665,903		1,665,903
Held-to-maturity securities	966,438		911,597		826,449		812,516		819,340		807,036
Trading account securities	688		688		995		995		643		643
Equity securities with readily determinable fair value	36,414		36,414		—		—		—		—
FHLB and FRB stock, at cost	99,998		99,998		89,989		89,989		87,192		87,192
Brokerage customer receivables	15,649		15,649		26,431		26,431		23,631		23,631
Mortgage loans held-for-sale, at fair value	338,111		338,111		313,592		313,592		370,282		370,282
Loans held-for-investment, at fair value	77,883		77,883		33,717		33,717		29,704		29,704
Loans held-for-investment, at amortized cost	23,046,068		23,261,545		21,607,080		21,768,978		20,929,678		21,064,801
MSRs	74,530		74,530		33,676		33,676		29,414		29,414
Nonqualified deferred compensation assets	12,503		12,503		11,065		11,065		10,824		10,824
Derivative assets	96,153		96,153		52,069		52,069		48,198		48,198
Accrued interest receivable and other	254,879		254,879		227,649		227,649		225,435		225,435
Total financial assets	$	28,601,336	$	28,761,972	$	26,367,211	$	26,515,176	$	25,710,924	$	25,833,743
Financial Liabilities
Non-maturity deposits	$	19,456,677	$	19,456,677	$	18,775,977	$	18,775,977	$	18,228,388	$	18,228,388
Deposits with stated maturities	5,460,038		5,475,048		4,407,370		4,350,004		4,666,675		4,608,760
FHLB advances	615,000		615,342		559,663		544,750		468,962		454,753
Other borrowings	373,571		373,571		266,123		266,123		251,680		251,680
Subordinated notes	139,172		146,838		139,088		144,266		139,052		145,376
Junior subordinated debentures	253,566		258,488		253,566		264,696		253,566		240,305
Derivative liabilities	71,381		71,381		35,671		35,671		35,773		35,773
FDIC indemnification liability	—		—		—		—		15,472		15,472
Accrued interest payable	15,374		15,374		8,030		8,030		9,177		9,177
Total financial liabilities	$	26,384,779	$	26,412,719	$	24,445,488	$	24,389,517	$	24,068,745	$	23,989,684

Not all the financial instruments listed in the table above are subject to the disclosure provisions of ASC Topic 820, as certain assets and liabilities result in their carrying value approximating fair value. These include cash and cash equivalents, interest bearing deposits with banks, brokerage customer receivables, FHLB and FRB stock, FDIC indemnification liability, accrued interest receivable and accrued interest payable and non-maturity deposits.

The following methods and assumptions were used by the Company in estimating fair values of financial instruments that were not previously disclosed.

Held-to-maturity securities. Held-to-maturity securities include U.S. Government-sponsored agency securities and municipal bonds issued by various municipal government entities primarily located in the Chicago metropolitan area and southern Wisconsin. Fair values for held-to-maturity securities are typically based on prices obtained from independent pricing vendors. In accordance with ASC 820, the Company has categorized these held-to-maturity securities as a Level 2 fair value measurement. Fair values for certain other held-to-maturity securities are based on the bond pricing methodology discussed previously related to certain available-for-sale securities. In accordance with ASC 820, the Company has categorized these held-to-maturity securities as a Level 3 fair value measurement.

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Loans held-for-investment, at amortized cost. Fair values are estimated for portfolios of loans with similar financial characteristics. Loans are analyzed by type such as commercial, residential real estate, etc. Each category is further segmented by interest rate type (fixed and variable) and term. For variable-rate loans that reprice frequently, estimated fair values are based on carrying values. The fair value of residential loans is based on secondary market sources for securities backed by similar loans, adjusted for differences in loan characteristics. The fair value for other fixed rate loans is estimated by discounting scheduled cash flows through the estimated maturity using estimated market discount rates that reflect credit and interest rate risks inherent in the loan. The primary impact of credit risk on the present value of the loan portfolio, however, was assessed through the use of the allowance for loan losses, which is believed to represent the current fair value of probable incurred losses for purposes of the fair value calculation. In accordance with ASC 820, the Company has categorized loans as a Level 3 fair value measurement.

Deposits with stated maturities. The fair value of certificates of deposit is based on the discounted value of contractual cash flows. The discount rate is estimated using the rates currently in effect for deposits of similar remaining maturities. In accordance with ASC 820, the Company has categorized deposits with stated maturities as a Level 3 fair value measurement.

FHLB advances. The fair value of FHLB advances is obtained from the FHLB which uses a discounted cash flow analysis based on current market rates of similar maturity debt securities to discount cash flows. In accordance with ASC 820, the Company has categorized FHLB advances as a Level 3 fair value measurement.

Subordinated notes. The fair value of the subordinated notes is based on a market price obtained from an independent pricing vendor. In accordance with ASC 820, the Company has categorized subordinated notes as a Level 2 fair value measurement.

Junior subordinated debentures. The fair value of the junior subordinated debentures is based on the discounted value of contractual cash flows. In accordance with ASC 820, the Company has categorized junior subordinated debentures as a Level 3 fair value measurement.

(17) Stock-Based Compensation Plans

In May 2015, the Company’s shareholders approved the 2015 Stock Incentive Plan (“the 2015 Plan”) which provides for the issuance of up to 5,485,000 shares of common stock. The 2015 Plan replaced the 2007 Stock Incentive Plan (“the 2007 Plan”) which replaced the 1997 Stock Incentive Plan (“the 1997 Plan”). The 2015 Plan, the 2007 Plan and the 1997 Plan are collectively referred to as “the Plans.” The 2015 Plan has substantially similar terms to the 2007 Plan and the 1997 Plan. Awards granted under the Plans for which common shares are not issued by reason of cancellation, forfeiture, lapse of such award or settlement of such award in cash, are again available under the 2015 Plan. All grants made after the approval of the 2015 Plan are made pursuant to the 2015 Plan. As of September 30, 2018, approximately 3.4 million shares were available for future grants assuming the maximum number of shares are issued for the performance awards outstanding. The Plans cover substantially all employees of Wintrust. The Compensation Committee of the Board of Directors administers all stock-based compensation programs and authorizes all awards granted pursuant to the Plans.

The Plans permit the grant of incentive stock options, non-qualified stock options, stock appreciation rights, stock awards, restricted share or unit awards, performance awards and other incentive awards valued in whole or in part by reference to the Company’s common stock, all on a stand alone, combination or tandem basis. The Company historically awarded stock-based compensation in the form of time-vested non-qualified stock options and time-vested restricted share unit awards (“restricted shares”). The grants of options provide for the purchase of shares of the Company’s common stock at the fair market value of the stock on the date the options are granted. Stock options generally vest ratably over periods of three to five years and have a maximum term of seven years from the date of grant. Restricted shares entitle the holders to receive, at no cost, shares of the Company’s common stock. Restricted shares generally vest over periods of one to five years from the date of grant.

Beginning in 2011, the Company has awarded annual grants under the Long-Term Incentive Program (“LTIP”), which is administered under the Plans. The LTIP is designed in part to align the interests of management with the interests of shareholders, foster retention, create a long-term focus based on sustainable results and provide participants with a target long-term incentive opportunity. It is anticipated that LTIP awards will continue to be granted annually. LTIP grants generally consist of a combination of time-vested non-qualified stock options, performance-based stock awards and performance-based cash awards. Performance-based stock and cash awards granted under the LTIP are contingent upon the achievement of pre-established long-term performance goals set in advance by the Compensation Committee over a three-year period starting at the beginning of each calendar year. These performance awards are granted at a target level, and based on the Company’s achievement of the pre-established long-term goals, the actual payouts can range from 0% to a maximum of 150% (for awards granted after 2014) or 200% (for awards granted prior to 2015) of the target award. The awards vest in the quarter after the end of the performance period upon certification of the payout by the Compensation Committee of the Board of Directors. Holders of performance-based stock awards are entitled to receive, at no cost, the shares earned based on the achievement of the pre-established long-term goals.

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Holders of restricted share awards and performance-based stock awards received under the Plans are not entitled to vote or receive cash dividends (or cash payments equal to the cash dividends) on the underlying common shares until the awards are vested and issued. Shares that are vested but not issuable pursuant to deferred compensation arrangements accrue additional shares based on the value of dividends otherwise paid. Except in limited circumstances, these awards are canceled upon termination of employment without any payment of consideration by the Company.

Stock-based compensation is measured as the fair value of an award on the date of grant, and the measured cost is recognized over the period which the recipient is required to provide service in exchange for the award. The fair values of restricted share and performance-based stock awards are determined based on the average of the high and low trading prices on the grant date, and the fair value of stock options is estimated using a Black-Scholes option-pricing model that utilizes various assumptions. Option-pricing models require the input of highly subjective assumptions and are sensitive to changes in the option's expected life and the price volatility of the underlying stock, which can materially affect the fair value estimate. Options granted since the inception of the LTIP in 2011 were primarily granted as LTIP awards. Expected life of options granted since the inception of the LTIP awards has been based on the safe harbor rule of the SEC Staff Accounting Bulletin No. 107 “Share-Based Payment” as the Company believes historical exercise data may not provide a reasonable basis to estimate the expected term of these options. Expected stock price volatility is based on historical volatility of the Company's common stock, which correlates with the expected life of the options, and the risk-free interest rate is based on comparable U.S. Treasury rates. Management reviews and adjusts the assumptions used to calculate the fair value of an option on a periodic basis to better reflect expected trends. No options were granted in the nine month periods ended September 30, 2018 and September 30, 2017.

Stock based compensation is recognized based upon the number of awards that are ultimately expected to vest, taking into account expected forfeitures. In addition, for performance-based awards, an estimate is made of the number of shares expected to vest as a result of actual performance against the performance criteria in the award to determine the amount of compensation expense to recognize. The estimate is reevaluated periodically and total compensation expense is adjusted for any change in estimate in the current period. Stock-based compensation expense recognized in the Consolidated Statements of Income was $3.2 million in the third quarter of 2018 and $2.4 million in the third quarter of 2017, and $10.3 million and $8.2 million for the 2018 and 2017

year-to-date periods, respectively.

A summary of the Company's stock option activity for the nine months endedSeptember 30, 2018 and September 30, 2017 is presented below:

Stock Options	Common Shares		Weighted Average Strike Price		Remaining Contractual Term(1)	Intrinsic Value (2) ($000)
Outstanding at January 1, 2018	1,084,756		$	41.98
Granted	—		—
Exercised	(271,674	)	41.36
Forfeited or canceled	(6,942	)	39.81
Outstanding at September 30, 2018	806,140		$	42.20	3.3	$	34,452
Exercisable at September 30, 2018	609,752		$	42.42	3.0	$	25,924

Stock Options	Common Shares		Weighted Average Strike Price		Remaining Contractual Term (1)	Intrinsic Value (2) ($000)
Outstanding at January 1, 2017	1,698,912		$	41.50
Granted	—		—
Exercised	(499,222	)	40.57
Forfeited or canceled	(16,378	)	43.07
Outstanding at September 30, 2017	1,183,312		$	41.87	4.2	$	43,122
Exercisable at September 30, 2017	640,759		$	41.58	3.5	$	23,532

(1) Represents the remaining weighted average contractual life in years.

(2) Aggregate intrinsic value represents the total pre-tax intrinsic value (i.e., the difference between the Company's stock price on the last trading day of the quarter and the option exercise price, multiplied by the number of shares) that would have been received by the option holders if they had exercised their options on the last day of the quarter. Options with exercise prices above the stock price on the last trading day of the quarter are excluded from the calculation of intrinsic value. The intrinsic value will change based on the fair market value of the Company's stock.

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The aggregate intrinsic value of options exercised during the nine months ended September 30, 2018 and September 30, 2017, was $12.9 million and $16.3 million, respectively. Cash received from option exercises under the Plan for the nine months ended September 30, 2018 and September 30, 2017 was $11.2 million and $20.3 million, respectively.

A summary of the Plans' restricted share activity for the nine months endedSeptember 30, 2018 and September 30, 2017 is presented below:

	Nine months ended September 30, 2018				Nine months ended September 30, 2017
Restricted Shares	Common Shares		Weighted Average Grant-Date Fair Value		Common Shares		Weighted Average Grant-Date Fair Value
Outstanding at January 1	127,787		$	53.33	133,425		$	49.94
Granted	28,506		87.65		14,249		72.53
Vested and issued	(10,438	)	56.88		(10,695	)	46.03
Forfeited or canceled	(982	)	55.39		(2,551	)	52.26
Outstanding at September 30	144,873		$	59.82	134,428		$	52.60
Vested, but not issuable at September 30	90,294		$	51.88	89,563		$	51.59

A summary of the Plans' performance-based stock award activity, based on the target level of the awards, for the nine months endedSeptember 30, 2018 and September 30, 2017 is presented below:

	Nine months ended September 30, 2018				Nine months ended September 30, 2017
Performance-based Stock	Common Shares		Weighted Average Grant-Date Fair Value		Common Shares		Weighted Average Grant-Date Fair Value
Outstanding at January 1	359,196		$	54.37	298,180		$	43.64
Granted	134,326		88.28		145,829		72.60
Vested and issued	(82,307	)	44.39		(68,712	)	46.85
Forfeited	(13,582	)	59.18		(14,164	)	52.81
Outstanding at September 30	397,633		$	67.72	361,133		$	54.36
Vested, but deferred at September 30	21,477		$	43.52	13,616		$	42.66

The Company issues new shares to satisfy its obligation to issue shares granted pursuant to the Plans.

(18) Shareholders’ Equity and Earnings Per Share

Series D Preferred Stock

In June 2015, the Company issued and sold 5,000,000 shares of fixed-to-floating non-cumulative perpetual preferred stock, Series D, liquidation preference $25 per share (the “Series D Preferred Stock”) for $125.0 million in a public offering. When, as and if declared, dividends on the Series D Preferred Stock are payable quarterly in arrears at a fixed rate of 6.50% per annum from the original issuance date to, but excluding, July 15, 2025, and from (and including) that date at a floating rate equal to three-month LIBOR plus a spread of 4.06% per annum.

Series C Preferred Stock

In March 2012, the Company issued and sold 126,500 shares of non-cumulative perpetual convertible preferred stock, Series C, liquidation preference $1,000 per share (the “Series C Preferred Stock”) for $126.5 million in a public offering. When, as and if declared, dividends on the Series C Preferred Stock were payable quarterly in arrears at a rate of 5.00% per annum. The Series C Preferred Stock was convertible into common stock at the option of the holder subject to customary anti-dilution adjustments. Additionally, on and after April 15, 2017, the Company had the right under certain circumstances to cause the Series C Preferred Stock to be converted into common stock if the closing price of the Company’s common stock exceeded a certain amount. On April 25, 2017, 2,073 shares of the Series C Preferred Stock were converted at the option of the respective holder into 51,244 shares of the Company's common stock, pursuant to the terms of the Series C Preferred Stock. On April 27, 2017, the Company caused a mandatory conversion of its remaining 124,184 shares of Series C Preferred Stock into 3,069,828 shares of the Company's

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common stock at a conversion rate of 24.72 shares of common stock per share of Series C Preferred Stock. Cash was paid in lieu of fractional shares for an amount considered insignificant.

Common Stock Warrant

Pursuant to the U.S. Department of the Treasury’s (the “U.S. Treasury”) Capital Purchase Program, on December 19, 2008, the Company issued to the U.S. Treasury a warrant to exercise 1,643,295 warrant shares of Wintrust common stock with a term of 10 years. The exercise price, subject to customary anti-dilution, was $22.57 at September 30, 2018. In February 2011, the U.S. Treasury sold all of its interest in the warrant issued to it in a secondary underwritten public offering. During the first nine months of 201815,951 warrant shares were exercised, which resulted in 11,764 shares of common stock issued. At September 30, 2018, all remaining holders of the interest in the warrant were able to exercise 7,410 warrant shares.

Other

At the January 2018 Board of Directors meeting, a quarterly cash dividend of $0.19 per share ($0.76 on an annualized basis) was declared. It was paid on February 22, 2018 to shareholders of record as of February 8, 2018. At the April 2018 Board of Directors meeting, a quarterly cash dividend of $0.19 per share ($0.76 on an annualized basis) was declared. It was paid on May 24, 2018 to shareholders of record as of May 10, 2018. At the July 2018 Board of Directors meeting, a quarterly cash dividend of $0.19 per share ($0.76 on an annualized basis) was declared. It was paid on August 23, 2018 to shareholders of record as of August 9, 2018.

Accumulated Other Comprehensive Income (Loss)

The following tables summarize the components of other comprehensive income (loss), including the related income tax effects, and the related amount reclassified to net income for the periods presented (in thousands).

	Accumulated Unrealized Losses on Securities			Accumulated Unrealized Gains on Derivative Instruments			Accumulated Foreign Currency Translation Adjustments			Total Accumulated Other Comprehensive Loss
Balance at July 1, 2018	$	(54,885	)	$	11,748		$	(38,079	)	$	(81,216	)
Other comprehensive (loss) income during the period, net of tax, before reclassifications	(13,277		)	1,851			1,942			(9,484		)
Amount reclassified from accumulated other comprehensive loss into net income, net of tax	(730		)	(1,696		)	—			(2,426		)
Amount reclassified from accumulated other comprehensive loss related to amortization of unrealized losses on investment securities transferred to held-to-maturity from available-for-sale, net of tax	(24		)	—			—			(24		)
Net other comprehensive (loss) income during the period, net of tax	$	(14,031	)	$	155		$	1,942		$	(11,934	)
Balance at September 30, 2018	$	(68,916	)	$	11,903		$	(36,137	)	$	(93,150	)
Balance at January 1, 2018	$	(15,813	)	$	7,164		$	(33,186	)	$	(41,835	)
Cumulative effect adjustment from the adoption of:
ASU 2016-01	(1,880		)	—			—			(1,880		)
ASU 2018-02	(4,517		)	1,543			—			(2,974		)
Other comprehensive (loss) income during the period, net of tax, before reclassifications	(46,665		)	6,368			(2,951		)	(43,248		)
Amount reclassified from accumulated other comprehensive income (loss) into net income, net of tax	(5		)	(3,172		)	—			(3,177		)
Amount reclassified from accumulated other comprehensive loss related to amortization of unrealized losses on investment securities transferred to held-to-maturity from available-for-sale, net of tax	(36		)	—			—			(36		)
Net other comprehensive (loss) income during the period, net of tax	$	(46,706	)	$	3,196		$	(2,951	)	$	(46,461	)
Balance at September 30, 2018	$	(68,916	)	$	11,903		$	(36,137	)	$	(93,150	)

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	Accumulated Unrealized Losses on Securities			Accumulated Unrealized Gains on Derivative Instruments		Accumulated Foreign Currency Translation Adjustments			Total Accumulated Other Comprehensive Loss
Balance at July 1, 2017	$	(15,022	)	$	4,959	$	(36,474	)	$	(46,537	)
Other comprehensive income during the period, net of tax, before reclassifications	653			228		4,206			5,087
Amount reclassified from accumulated other comprehensive income into net income, net of tax	(24		)	8		—			(16		)
Amount reclassified from accumulated other comprehensive loss related to amortization of unrealized losses on investment securities transferred to held-to-maturity from available-for-sale, net of tax	(20		)	—		—			(20		)
Net other comprehensive income during the period, net of tax	$	609		$	236	$	4,206		$	5,051
Balance at September 30, 2017	$	(14,413	)	$	5,195	$	(32,268	)	$	(41,486	)
Balance at January 1, 2017	$	(29,309	)	$	4,165	$	(40,184	)	$	(65,328	)
Other comprehensive income during the period, net of tax, before reclassifications	15,815			393		7,916			24,124
Amount reclassified from accumulated other comprehensive income into net income, net of tax	(19		)	637		—			618
Amount reclassified from accumulated other comprehensive loss related to amortization of unrealized losses on investment securities transferred to held-to-maturity from available-for-sale, net of tax	(900		)	—		—			(900		)
Net other comprehensive income during the period, net of tax	$	14,896		$	1,030	$	7,916		$	23,842
Balance at September 30, 2017	$	(14,413	)	$	5,195	$	(32,268	)	$	(41,486	)

	Amount Reclassified from Accumulated Other Comprehensive Income for the
Details Regarding the Component of Accumulated Other Comprehensive Income	Three Months Ended						Nine Months Ended						Impacted Line on the Consolidated Statements of Income
	September 30,						September 30,
	2018			2017			2018			2017
Accumulated unrealized losses on securities
Gains included in net income	$	1,001		$	39		$	6		$	31		Gains (losses) on investment securities, net
	1,001			39			6			31			Income before taxes
Tax effect	$	(271	)	$	(15	)	$	(1	)	$	(12	)	Income tax expense
Net of tax	$	730		$	24		$	5		$	19		Net income
Accumulated unrealized losses on derivative instruments
Amount reclassified to interest expense on deposits	$	(2,319	)	$	(380	)	$	(4,338	)	$	(15	)	Interest on deposits
Amount reclassified to interest expense on junior subordinated debentures	—			394			—			1,066			Interest on junior subordinated debentures
	2,319			(14		)	4,338			(1,051		)	Income before taxes
Tax effect	$	(623	)	$	6		$	(1,166	)	$	414		Income tax expense
Net of tax	$	1,696		$	(8	)	$	3,172		$	(637	)	Net income

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Earnings per Share

The following table shows the computation of basic and diluted earnings per share for the periods indicated:

		Three Months Ended				Nine Months Ended
(In thousands, except per share data)		September 30, 2018		September 30, 2017		September 30, 2018		September 30, 2017
Net income		$	91,948	$	65,626	$	263,509	$	188,901
Less: Preferred stock dividends		2,050		2,050		6,150		7,728
Net income applicable to common shares—Basic	(A)	89,898		63,576		257,359		181,173
Add: Dividends on convertible preferred stock, if dilutive		—		—		—		1,578
Net income applicable to common shares—Diluted	(B)	89,898		63,576		257,359		182,751
Weighted average common shares outstanding	(C)	56,366		55,796		56,268		54,292
Effect of dilutive potential common shares
Common stock equivalents		918		966		912		988
Convertible preferred stock, if dilutive		—		—		—		1,317
Total dilutive potential common shares		918		966		912		2,305
Weighted average common shares and effect of dilutive potential common shares	(D)	57,284		56,762		57,180		56,597
Net income per common share:
Basic	(A/C)	$	1.59	$	1.14	$	4.57	$	3.34
Diluted	(B/D)	$	1.57	$	1.12	$	4.50	$	3.23

Potentially dilutive common shares can result from stock options, restricted stock unit awards, stock warrants, the Company’s convertible preferred stock and shares to be issued under the Employee Stock Purchase Plan and the Directors Deferred Fee and Stock Plan, being treated as if they had been either exercised or issued, computed by application of the treasury stock method. While potentially dilutive common shares are typically included in the computation of diluted earnings per share, potentially dilutive common shares are excluded from this computation in periods in which the effect would reduce the loss per share or increase the income per share. For diluted earnings per share, net income applicable to common shares can be affected by the conversion of the Company’s convertible preferred stock. Where the effect of this conversion would reduce the loss per share or increase the income per share for a period, net income applicable to common shares is not adjusted by the associated preferred dividends.

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ITEM 2

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL

CONDITION AND RESULTS OF OPERATIONS

The following discussion and analysis of financial condition as of September 30, 2018 compared with December 31, 2017 and September 30, 2017, and the results of operations for the three and nine month periods ended September 30, 2018 and September 30, 2017, should be read in conjunction with the unaudited consolidated financial statements and notes contained in this report and the risk factors discussed herein and under Item 1A of the Company’s 2017 Annual Report on Form 10-K. This discussion contains forward-looking statements that involve risks and uncertainties and, as such, future results could differ significantly from management’s current expectations. See the last section of this discussion for further information on forward-looking statements.

Introduction

Wintrust is a financial holding company that provides traditional community banking services, primarily in the Chicago metropolitan area, southern Wisconsin and northwest Indiana, and operates other financing businesses on a national basis and in Canada through several non-bank business units. Additionally, Wintrust offers a full array of wealth management services primarily to customers in the Chicago metropolitan area, southern Wisconsin and northwest Indiana.

Overview

Third Quarter Highlights

The Company recorded net income of $91.9 million for the third quarter of 2018 compared to $65.6 million in the third quarter of 2017. The results for the third quarter of 2018 demonstrate continued momentum on our operating strengths including steady loan and deposit growth and increased revenue from wealth management and mortgage banking services. Combined with the noted continued loan growth, the improvement in net interest margin during the third quarter of 2018 compared to the same period of 2017 resulted in higher net interest income in the current period. Additionally, the Company's effective tax rate decreased from 37.0% in the third quarter of 2017 to 25.1% in the third quarter of 2018 primarily due to the reduction of the federal corporate tax rate effective in 2018 as a result of the enactment of the Tax Act.

The Company increased its loan portfolio, excluding covered loans, from $20.9 billion at September 30, 2017 and $21.6 billion at December 31, 2017 to $23.1 billion at September 30, 2018. The increase in the current quarter compared to the prior quarters was primarily a result of the Company’s growth in the commercial, commercial real estate, commercial premium finance receivables and life insurance premium finance receivables portfolios. The Company is focused on making new loans, including in the commercial and commercial real estate sector, where opportunities that meet our underwriting standards exist. For more information regarding changes in the Company’s loan portfolio, see Financial Condition – Interest Earning Assets and Note 6 - Loans of the Consolidated Financial Statements in Item 1 of this report.

The Company recorded net interest income of $247.6 million in the third quarter of 2018 compared to $216.0 million in the third quarter of 2017. The higher level of net interest income recorded in the third quarter of 2018 compared to the third quarter of 2017 resulted primarily from a $2.0 billion increase in average loans, excluding covered loans, and a substantial improvement in the yield on earning assets. This was partially offset by an increase in the average balance and cost of interest-bearing liabilities (see "Net Interest Income" for further detail).

Non-interest income totaled $99.9 million in the third quarter of 2018 compared to $79.7 million in the third quarter of 2017. This increase was primarily the result of increases from wealth management revenue, higher mortgage banking revenue and increased income on bank-owned life insurance (see “Non-Interest Income” for further detail).

Non-interest expense totaled $213.6 million in the third quarter of 2018, increasing $30.1 million, or 16%, compared to the third quarter of 2017. The increase compared to the third quarter of 2017 was primarily attributable to higher salary and employee benefit costs caused by the addition of employees from acquisitions, merit-based salary increases for current employees effective in February 2018, an increase of the minimum wage for eligible hourly employees effective in March 2018, higher bonus and long-term performance-based incentive compensation due to higher earnings, increased professional fees primarily due to certain consulting agreements paid in relation to the acquisition of CSC, higher occupancy expenses, higher data processing expenses and an increase in advertising and marketing expenses (see “Non-Interest Expense” for further detail).

Management considers the maintenance of adequate liquidity to be important to the management of risk. During the third quarter of 2018, the Company continued its practice of maintaining appropriate funding capacity to provide the Company with adequate liquidity for its ongoing operations. In this regard, the Company benefited from its strong deposit base, a liquid short-term investment

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portfolio and its access to funding from a variety of external funding sources. At September 30, 2018, the Company had approximately $1.4 billion in overnight liquid funds and interest-bearing deposits with banks.

RESULTS OF OPERATIONS

Earnings Summary

The Company’s key operating measures and growth rates for the three and nine months ended September 30, 2018, as compared to the same period last year, are shown below:

	Three months ended
(Dollars in thousands, except per share data)	September 30, 2018			September 30, 2017			Percentage (%) or Basis Point (bp) Change
Net income	$	91,948		$	65,626		40	%
Net income per common share—Diluted	1.57			1.12			40
Net revenue (1)	347,493			295,719			18
Net interest income	247,563			215,988			15
Net interest margin	3.59		%	3.43		%	16 bp
Net interest margin - fully taxable equivalent (non-GAAP) (2)	3.61			3.46			15
Net overhead ratio (3)	1.53			1.53			—
Return on average assets	1.24			0.96			28
Return on average common equity	11.86			9.15			271
Return on average tangible common equity (non-GAAP) (2)	14.64			11.39			325

	Nine months ended
(Dollars in thousands, except per share data)	September 30, 2018			September 30, 2017			Percentage (%) or Basis Point (bp) Change
Net income	$	263,509		$	188,901		39	%
Net income per common share—Diluted	4.50			3.23			39
Net revenue (1)	991,657			851,445			16
Net interest income	710,815			612,977			16
Net interest margin	3.58		%	3.40			18 bp
Net interest margin - fully taxable equivalent (non-GAAP) (2)	3.60			3.43			17
Net overhead ratio (3)	1.56			1.52			4
Return on average assets	1.23			0.97			26
Return on average common equity	11.71			9.21			250
Return on average tangible common equity (non-GAAP) (2)	14.47			11.62			285
At end of period
Total assets	$	30,142,731		$	27,358,162		10	%
Total loans, excluding loans held-for-sale, excluding covered loans	23,123,951			20,912,781			11
Total loans, including loans held-for-sale, excluding covered loans	23,462,062			21,283,063			10
Total deposits	24,916,715			22,895,063			9
Total shareholders’ equity	3,179,822			2,908,925			9
Book value per common share (2)	54.19			49.86			9
Tangible common book value per share (2)	44.16			40.53			9
Market price per common share	84.94			78.31			8
Excluding covered loans:
Allowance for credit losses to total loans (4)	0.65		%	0.64		%	1 bp
Non-performing loans to total loans	0.55			0.37			18

(1) Net revenue is net interest income plus non-interest income.

(2) See following section titled, “Supplementary Financial Measures/Ratios” for additional information on this performance measure/ratio.

(3) The net overhead ratio is calculated by netting total non-interest expense and total non-interest income, annualizing this amount, and dividing by that period’s total average assets. A lower ratio indicates a higher degree of efficiency.

(4) The allowance for credit losses includes both the allowance for loan losses and the allowance for lending-related commitments.

Certain returns, yields, performance ratios, and quarterly growth rates are “annualized” in this presentation and throughout this report to represent an annual time period. This is done for analytical purposes to better discern for decision-making purposes underlying performance trends when compared to full-year or year-over-year amounts. For example, balance sheet growth rates are most often expressed in terms of an annual rate. As such, 5% growth during a quarter would represent an annualized growth rate of 20%.

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SUPPLEMENTAL FINANCIAL MEASURES/RATIOS

The accounting and reporting policies of Wintrust conform to generally accepted accounting principles (“GAAP”) in the United States and prevailing practices in the banking industry. However, certain non-GAAP performance measures and ratios are used by management to evaluate and measure the Company’s performance. These include taxable-equivalent net interest income (including its individual components), taxable-equivalent net interest margin (including its individual components), the taxable-equivalent efficiency ratio, tangible common equity ratio, tangible common book value per share and return on average tangible common equity. Management believes that these measures and ratios provide users of the Company’s financial information a more meaningful view of the performance of the Company's interest-earning assets and interest-bearing liabilities and of the Company’s operating efficiency. Other financial holding companies may define or calculate these measures and ratios differently.

Management reviews yields on certain asset categories and the net interest margin of the Company and its banking subsidiaries on a fully taxable-equivalent (“FTE”) basis. In this non-GAAP presentation, net interest income is adjusted to reflect tax-exempt interest income on an equivalent before-tax basis. This measure ensures comparability of net interest income arising from both taxable and tax-exempt sources. Net interest income on a FTE basis is also used in the calculation of the Company’s efficiency ratio. The efficiency ratio, which is calculated by dividing non-interest expense by total taxable-equivalent net revenue (less securities gains or losses), measures how much it costs to produce one dollar of revenue. Securities gains or losses are excluded from this calculation to better match revenue from daily operations to operational expenses. Management considers the tangible common equity ratio and tangible book value per common share as useful measurements of the Company’s equity. The Company references the return on average tangible common equity as a measurement of profitability.

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A reconciliation of certain non-GAAP performance measures and ratios used by the Company to evaluate and measure the Company’s performance to the most directly comparable GAAP financial measures is shown below:

	Three Months Ended						Nine Months Ended
	September 30,			September 30,			September 30,			September 30,
(Dollars and shares in thousands)	2018			2017			2018			2017
Calculation of Net Interest Margin and Efficiency Ratio
(A) Interest Income (GAAP)	$	304,962		$	247,688		$	850,214		$	694,628
Taxable-equivalent adjustment:
- Loans	941			1,033			2,423			2,654
- Liquidity Management Assets	575			921			1,672			2,694
- Other Earning Assets	3			5			7			12
(B) Interest Income - FTE	$	306,481		$	249,647		$	854,316		$	699,988
(C) Interest Expense (GAAP)	57,399			31,700			139,399			81,651
(D) Net Interest Income - FTE (B minus C)	$	249,082		$	217,947		$	714,917		$	618,337
(E) Net Interest Income (GAAP) (A minus C)	$	247,563		$	215,988		$	710,815		$	612,977
Net interest margin (GAAP-derived)	3.59		%	3.43		%	3.58		%	3.40		%
Net interest margin - FTE	3.61		%	3.46		%	3.60		%	3.43		%
(F) Non-interest income	$	99,930		$	79,731		$	280,842		$	238,468
(G) Gains (losses) on investment securities, net	90			39			(249		)	31
(H) Non-interest expense	213,637			183,575			614,755			535,237
Efficiency ratio (H/(E+F-G))	61.50		%	62.09		%	61.98		%	62.86		%
Efficiency ratio - FTE (H/(D+F-G))	61.23		%	61.68		%	61.72		%	62.47		%
Calculation of Tangible Common Equity ratio (at period end)
Total shareholders’ equity	$	3,179,822		$	2,908,925
Less: Non-convertible preferred stock	(125,000		)	(125,000		)
Less: Intangible assets	(564,938		)	(520,672		)
(I) Total tangible common shareholders’ equity	$	2,489,884		$	2,263,253
Total assets	$	30,142,731		$	27,358,162
Less: Intangible assets	(564,938		)	(520,672		)
(J) Total tangible assets	$	29,577,793		$	26,837,490
Tangible common equity ratio (I/J)	8.4		%	8.4		%
Calculation of book value per share
Total shareholders’ equity	$	3,179,822		$	2,908,925
Less: Preferred stock	(125,000		)	(125,000		)
(K) Total common equity	$	3,054,822		$	2,783,925
(L) Actual common shares outstanding	56,377			55,838
Book value per common share (K/L)	$	54.19		$	49.86
Tangible common book value per share (I/L)	$	44.16		$	40.53

Calculation of return on average common equity
(M) Net income applicable to common shares	89,898		63,576		257,359		181,173
Add: After-tax intangible asset amortization	871		672		2,366		2,169
(N) Tangible net income applicable to common shares	90,769		64,248		259,725		183,342
Total average shareholders' equity	3,131,943		2,882,682		3,064,396		2,808,072
Less: Average preferred stock	(125,000	)	(125,000	)	(125,000	)	(178,632	)
(O) Total average common shareholders' equity	3,006,943		2,757,682		2,939,396		2,629,440
Less: Average intangible assets	(547,552	)	(520,333	)	(539,281	)	(520,006	)
(P) Total average tangible common shareholders’ equity	2,459,391		2,237,349		2,400,115		2,109,434
Return on average common equity, annualized (M/O)	11.86	%	9.15	%	11.71	%	9.21	%
Return on average tangible common equity, annualized (N/P)	14.64	%	11.39	%	14.47	%	11.62	%

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Critical Accounting Policies

The Company’s Consolidated Financial Statements are prepared in accordance with GAAP in the United States and prevailing practices of the banking industry. Application of these principles requires management to make estimates, assumptions, and judgments that affect the amounts reported in the financial statements and accompanying notes. Certain policies and accounting principles inherently have a greater reliance on the use of estimates, assumptions and judgments, and as such have a greater possibility that changes in those estimates and assumptions could produce financial results that are materially different than originally reported. Estimates, assumptions and judgments are necessary when assets and liabilities are required to be recorded at fair value, when a decline in the value of an asset not carried on the financial statements at fair value warrants an impairment write-down or valuation reserve to be established, or when an asset or liability needs to be recorded contingent upon a future event, are based on information available as of the date of the financial statements; accordingly, as information changes, the financial statements could reflect different estimates and assumptions. Management views critical accounting policies to be those which are highly dependent on subjective or complex judgments, estimates and assumptions, and where changes in those estimates and assumptions could have a significant impact on the financial statements. Management currently views critical accounting policies to include the determination of the allowance for loan losses and the allowance for losses on lending-related commitments, loans acquired with evidence of credit quality deterioration since origination, estimations of fair value, the valuations required for impairment testing of goodwill, the valuation and accounting for derivative instruments and income taxes as the accounting areas that require the most subjective and complex judgments, and as such could be most subject to revision as new information becomes available. For a more detailed discussion on these critical accounting policies, see “Summary of Critical Accounting Policies” beginning on page 55 of the Company’s 2017 Form 10-K.

Net Income

Net income for the quarter ended September 30, 2018 totaled $91.9 million, an increase of $26.3 million, or 40%, compared to the quarter ended September 30, 2017. On a per share basis, net income for the third quarter of 2018 totaled $1.57 per diluted common share compared to $1.12 for the third quarter of 2017.

The most significant factors impacting net income for the third quarter of 2018 as compared to the same period in the prior year include an increase in net interest income as a result of growth in earning assets and an improvement in net interest margin, an increase in wealth management revenue, higher mortgage banking revenue, higher BOLI income and a reduction in the Company's effective tax rate due to the reduction of the federal corporate tax rate as a result of the Tax Act. These improvements were partially offset by an increase in non-interest expense primarily attributable to higher salary and employee benefit costs caused by the addition of employees from the CSC and Veterans First acquisitions, merit-based salary increases for current employees effective in February 2018, an increase of the minimum wage for eligible hourly employees effective in March 2018, higher bonus and long-term performance-based incentive compensation due to higher earnings, higher occupancy expenses, increased data processing costs, higher professional fees from increased consulting costs driven by certain consulting agreements paid in relation to the acquisition of CSC and an increase in marketing costs from spending related to deposit generation and brand awareness to grow our loan and deposit portfolios.

Net Interest Income

The primary source of the Company’s revenue is net interest income. Net interest income is the difference between interest income and fees on earnings assets, such as loans and securities, and interest expense on the liabilities to fund those assets, including interest bearing deposits and other borrowings. The amount of net interest income is affected by both changes in the level of interest rates, and the amount and composition of earning assets and interest bearing liabilities.

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Quarter Ended September 30, 2018 compared to the Quarters Ended June 30, 2018 and September 30, 2017

The following table presents a summary of the Company’s average balances, net interest income and related net interest margins, including a calculation on a fully taxable equivalent basis, for the third quarter of 2018 as compared to the second quarter of 2018 (sequential quarters) and third quarter of 2017 (linked quarters):

	Average Balance for three months ended,									Interest for three months ended,									Yield/Rate for three months ended,
(Dollars in thousands)	September 30, 2018			June 30, 2018			September 30, 2017			September 30, 2018			June 30, 2018			September 30, 2017			September 30, 2018		June 30, 2018		September 30, 2017
Interest-bearing deposits with banks and cash equivalents(1)	$	998,004		$	759,425		$	1,003,572		$	5,423		$	3,244		$	3,272		2.16	%	1.71	%	1.29	%
Investment securities (2)	3,046,272			2,890,828			2,652,119			22,285			20,454			16,979			2.90		2.84		2.54
FHLB and FRB stock	88,335			115,119			81,928			1,235			1,455			1,080			5.54		5.07		5.23
Liquidity management assets(3)(8)	$	4,132,611		$	3,765,372		$	3,737,619		$	28,943		$	25,153		$	21,331		2.78	%	2.68	%	2.26	%
Other earning assets(3)(4)(8)	17,862			21,244			25,844			178			172			163			3.95		3.24		2.49
Mortgage loans held-for-sale	380,235			403,967			336,604			5,285			4,226			3,223			5.51		4.20		3.80
Loans, net of unearned income(3)(5)(8)	22,823.378			22,283,541			20,858,618			272,075			255,875			224,330			4.73		4.61		4.27
Covered loans	—			—			48,415			—			—			600			—		—		4.91
Total earning assets(8)	$	27,354,086		$	26,474,124		$	25,007,100		$	306,481		$	285,426		$	249,647		4.45	%	4.32	%	3.96	%
Allowance for loan and covered loan losses	(148,503		)	(147,192		)	(135,519		)
Cash and due from banks	268,006			270,240			242,186
Other assets	2,051,520			1,970,407			1,898,528
Total assets	$	29,525,109		$	28,567,579		$	27,012,295
NOW and interest bearing demand deposits	$	2,519,445		$	2,295,268		$	2,344,848		$	2,479		$	1,901		$	1,313		0.39	%	0.33	%	0.22	%
Wealth management deposits	2,517,141			2,365,191			2,320,674			8,287			6,992			4,715			1.31		1.19		0.81
Money market accounts	5,369,324			4,883,645			4,471,342			13,260			8,111			3,505			0.98		0.67		0.31
Savings accounts	2,672,077			2,702,665			2,581,946			2,907			2,709			2,162			0.43		0.40		0.33
Time deposits	5,214,637			4,557,187			4,573,081			21,803			15,580			11,960			1.66		1.37		1.04
Interest-bearing deposits	$	18,292,624		$	16,803,956		$	16,291,891		$	48,736		$	35,293		$	23,655		1.06	%	0.84	%	0.58	%
Federal Home Loan Bank advances	429,739			1,006,407			324,996			1,947			4,263			2,151			1.80		1.70		2.63
Other borrowings	268,278			240,066			268,850			2,003			1,698			1,482			2.96		2.84		2.19
Subordinated notes	139,155			139,125			139,035			1,773			1,787			1,772			5.10		5.14		5.10
Junior subordinated debentures	253,566			253,566			253,566			2,940			2,836			2,640			4.54		4.42		4.07
Total interest-bearing liabilities	$	19,383,362		$	18,443,120		$	17,278,338		$	57,399		$	45,877		$	31,700		1.17	%	1.00	%	0.73	%
Non-interest bearing deposits	6,461,195			6,539,731			6,419,326
Other liabilities	548,609			520,574			431,949
Equity	3,131,943			3,064,154			2,882,682
Total liabilities and shareholders’ equity	$	29,525,109		$	28,567,579		$	27,012,295
Interest rate spread(6)(8)																			3.28	%	3.32	%	3.23	%
Less: Fully tax-equivalent adjustment										(1,519		)	(1,379		)	(1,959		)	(0.02	)	(0.02	)	(0.03	)
Net free funds/contribution(7)	$	7,970,724		$	8,031,004		$	7,728,762											0.33		0.31		0.23
Net interest income/ margin(8) (GAAP)										$	247,563		$	238,170		$	215,988		3.59	%	3.61	%	3.43	%
Fully tax-equivalent adjustment										1,519			$	1,379		$	1,959		0.02		0.02		0.03
Net interest income/ margin - FTE (8)										$	249,082		$	239,549		$	217,947		3.61	%	3.63	%	3.46	%

(1) Includes interest-bearing deposits from banks, federal funds sold and securities purchased under resale agreements.

(2) Investment securities includes investment securities classified as available-for-sale and held-to-maturity, and equity securities with readily determinable fair values. Equity securities without readily determinable fair values are included within other assets.

(3) Interest income on tax-advantaged loans, trading securities and investment securities reflects a tax-equivalent adjustment based on a marginal federal corporate tax rate in effect as of the applicable period. The total adjustments for the three months ended September 30, 2018, June 30, 2018 and September 30, 2017 were $1.5 million, $1.4 millionand $2.0 million respectively.

(4) Other earning assets include brokerage customer receivables and trading account securities.

(5) Loans, net of unearned income, include non-accrual loans.

(6) Interest rate spread is the difference between the yield earned on earning assets and the rate paid on interest-bearing liabilities.

(7) Net free funds are the difference between total average earning assets and total average interest-bearing liabilities. The estimated contribution to net interest margin from net free funds is calculated using the rate paid for total interest-bearing liabilities.

(8) See “Supplemental Financial Measures/Ratios” for additional information on this performance ratio.

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For the third quarter of 2018, net interest income totaled $247.6 million, an increase of $9.4 million as compared to the second quarter of 2018, and an increase of $31.6 million as compared to the third quarter of 2017. Net interest margin was 3.59% (3.61% on a fully tax-equivalent basis) during the third quarter of 2018 compared to 3.61% (3.63% on a fully tax-equivalent basis) during the second quarter of 2018, and 3.43% (3.46% on a fully tax-equivalent basis) during the third quarter of 2017.

Nine months endedSeptember 30, 2018 compared to nine months endedSeptember 30, 2017

The following table presents a summary of the Company’s net interest income and related net interest margin, including a calculation on a fully taxable equivalent basis, for the nine months endedSeptember 30, 2018 compared to the nine months endedSeptember 30, 2017:

	Average Balance for nine months ended,						Interest for nine months ended,						Yield/Rate for nine months ended,
(Dollars in thousands)	September 30, 2018			September 30, 2017			September 30, 2018			September 30, 2017			September 30, 2018		September 30, 2017
Interest-bearing deposits with banks and cash equivalents (1)	$	836,710		$	836,373		$	11,463		$	6,531		1.83	%	1.04	%
Investment securities (2)	2,943,802			2,541,061			62,398			47,849			2.83		2.52
FHLB and FRB stock	102,893			91,774			3,988			3,303			5.18		4.81
Liquidity management assets(3)(8)	$	3,883,405		$	3,469,208		$	77,849		$	57,683		2.68	%	2.22	%
Other earning assets(3)(4)(8)	22,190			25,612			524			508			3.15		2.65
Mortgage loans held-for-sale	355,491			313,675			12,329			9,041			4.64		3.85
Loans, net of unearned income(3)(5)(8)	22,276,827			20,263,832			763,614			630,591			4.58		4.16
Covered loans	—			52,339			—			2,165			—		5.53
Total earning assets(8)	$	26,537,913		$	24,124,666		$	854,316		$	699,988		4.30	%	3.88	%
Allowance for loan and covered loan losses	(146,287		)	(131,695		)
Cash and due from banks	264,294			238,136
Other assets	1,984,460			1,865,702
Total assets	$	28,640,380		$	26,096,809
NOW and interest bearing demand deposits	$	2,357,768		$	2,441,911		$	5,765		$	3,620		0.33	%	0.20	%
Wealth management deposits	2,378,468			2,165,610			20,721			9,894			1.16		0.61
Money market accounts	4,927,639			4,438,537			26,038			8,433			0.71		0.25
Savings accounts	2,728,986			2,380,688			8,348			4,999			0.41		0.28
Time deposits	4,701,247			4,369,688			49,706			31,450			1.41		0.96
Interest-bearing deposits	$	17,094,108		$	15,796,434		$	110,578		$	58,396		0.86	%	0.49	%
Federal Home Loan Bank advances	768,029			399,171			9,849			6,674			1.71		2.24
Other borrowings	257,175			254,854			5,400			3,770			2.81		1.98
Subordinated notes	139,125			139,008			5,333			5,330			5.11		5.11
Junior subordinated debentures	253,566			253,566			8,239			7,481			4.28		3.89
Total interest-bearing liabilities	$	18,512,003		$	16,843,033		$	139,399		$	81,651		1.01	%	0.65	%
Non-interest bearing deposits	6,546,269			6,039,329
Other liabilities	517,712			406,375
Equity	3,064,396			2,808,072
Total liabilities and shareholders’ equity	$	28,640,380		$	26,096,809
Interest rate spread(6)(8)													3.29	%	3.23	%
Less: Fully tax-equivalent adjustment							(4,102		)	(5,360		)	(0.02	)	(0.03	)
Net free funds/contribution(7)	$	8,025,910		$	7,281,633								0.31		0.20
Net interest income/ margin(8) (GAAP)							$	710,815		$	612,977		3.58	%	3.40	%
Fully tax-equivalent adjustment							4,102			5,360			0.02		0.03
Net interest income/ margin - FTE (8)							$	714,917		$	618,337		3.60	%	3.43	%

(1) Includes interest-bearing deposits from banks, federal funds sold and securities purchased under resale agreements.

(2) Investment securities includes investment securities classified as available-for-sale and held-to-maturity, and equity securities with readily determinable fair values. Equity securities without readily determinable fair values are included within other assets.

(3) Interest income on tax-advantaged loans, trading securities and investment securities reflects a tax-equivalent adjustment based on a marginal federal corporate tax rate in effect as of the applicable period. The total adjustments for the nine months endedSeptember 30, 2018 and 2017 were $4.1 million and $5.4 million respectively.

(4) Other earning assets include brokerage customer receivables and trading account securities.

(5) Loans, net of unearned income, include non-accrual loans.

(6) Interest rate spread is the difference between the yield earned on earning assets and the rate paid on interest-bearing liabilities.

(7) Net free funds are the difference between total average earning assets and total average interest-bearing liabilities. The estimated contribution to net interest margin from net free funds is calculated using the rate paid for total interest-bearing liabilities.

(8) See “Supplemental Financial Measures/Ratios” for additional information on this performance ratio.

68

For the first nine months of 2018, net interest income totaled $710.8 million, an increase of $97.8 million as compared to the first nine months of 2017. Net interest margin was 3.58% (3.60% on a fully tax-equivalent basis) for the first nine months of 2018 compared to 3.40% (3.43% on a fully tax-equivalent basis) for the same period of 2017.

Analysis of Changes in Net Interest Income (GAAP)

The following table presents an analysis of the changes in the Company’s net interest income comparing the three month periods ended September 30, 2018 to June 30, 2018 and September 30, 2017 and the nine month periods ended September 30, 2018 and September 30, 2017. The reconciliations set forth the changes in the GAAP-derived net interest income as a result of changes in volumes, changes in rates and differing number of days in each period:

	Third Quarter of 2018 Compared to Second Quarter of 2018			Third Quarter of 2018 Compared to Third Quarter of 2017		First Nine Months of 2018 Compared to First Nine Months of 2017
(Dollars in thousands)
Net interest income (GAAP) for comparative period	$	238,170		$	215,988	$	612,977
Change due to mix and growth of earning assets and interest-bearing liabilities (volume)	9,098			20,396		60,067
Change due to interest rate fluctuations (rate)	(2,294		)	11,179		37,771
Change due to number of days in each period	2,589			—		—
Net interest income (GAAP) for the period ended September 30, 2018	$	247,563		$	247,563	$	710,815
Fully tax-equivalent adjustment	1,519			1,519		4,102
Net interest income - FTE	$	249,082		$	249,082	$	714,917

Non-interest Income

The following table presents non-interest income by category for the periods presented:

	Three Months Ended						$ Change			% Change
(Dollars in thousands)	September 30, 2018			September 30, 2017
Brokerage	$	5,579		$	5,127		$	452		9	%
Trust and asset management	17,055			14,676			2,379			16
Total wealth management	$	22,634		$	19,803		$	2,831		14	%
Mortgage banking	42,014			28,184			13,830			49
Service charges on deposit accounts	9,331			8,645			686			8
Gains on investment securities, net	90			39			51			NM
Fees from covered call options	627			1,143			(516		)	(45	)
Trading (losses) gains, net	(61		)	(129		)	68			(53	)
Operating lease income, net	9,132			8,461			671			8
Other:
Interest rate swap fees	2,359			1,762			597			34
BOLI	3,190			897			2,293			NM
Administrative services	1,099			1,052			47			4
Early pay-offs of capital leases	11			—			11			NM
Miscellaneous	9,504			9,874			(370		)	(4	)
Total Other	$	16,163		$	13,585		$	2,578		19	%
Total Non-Interest Income	$	99,930		$	79,731		$	20,199		25	%

69

	Nine Months Ended						$ Change			% Change
(Dollars in thousands)	September 30, 2018			September 30, 2017
Brokerage	$	17,394		$	16,796		$	598		4	%
Trust and asset management	50,843			43,060			7,783			18
Total wealth management	$	68,237		$	59,856		$	8,381		14	%
Mortgage banking	112,808			86,061			26,747			31
Service charges on deposit accounts	27,339			25,606			1,733			7
(Losses) gains on investment securities, net	(249		)	31			(280		)	NM
Fees from covered call options	2,893			2,792			101			4
Trading gains (losses), net	166			(869		)	1,035			NM
Operating lease income, net	27,569			21,048			6,521			31
Other:
Interest rate swap fees	8,425			5,416			3,009			56
BOLI	5,448			2,770			2,678			97
Administrative services	3,365			3,062			303			10
Early pay-offs of capital leases	598			1,221			(623		)	(51	)
Miscellaneous	24,243			31,474			(7,231		)	(23	)
Total Other	$	42,079		$	43,943		$	(1,864	)	(4	)%
Total Non-Interest Income	$	280,842		$	238,468		$	42,374		18	%

NM - Not Meaningful

Notable contributions to the change in non-interest income are as follows:

The increase in wealth management revenue during the current period as compared to the same period of 2017 is primarily attributable to growth in assets under management along with market appreciation related to managed money accounts with fees based on assets under management. Wealth management revenue is comprised of the trust and asset management revenue of The Chicago Trust Company and Great Lakes Advisors and the brokerage commissions, managed money fees and insurance product commissions at Wintrust Investments.

The increase in mortgage banking revenue in the current quarter as compared to the same period of 2017 resulted primarily from increased revenue from loans originated and sold, higher positive fair market value adjustment to MSRs and higher servicing income as the Company's loan servicing portfolio increased due to the acquisition of Veterans First, partially offset by lower production margins. Mortgage banking revenue includes revenue from activities related to originating, selling and servicing residential real estate loans for the secondary market. Mortgage revenue is also impacted by changes in the fair value of MSRs as the Company does not hedge this change in fair value. The Company originates mortgage loans held-for-sale with associated MSRs either retained or released. The Company records MSRs at fair value on a recurring basis.

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The table below presents additional selected information regarding mortgage banking revenue for the respective periods.

	Three months ended						Nine Months Ended
(Dollars in thousands)	September 30, 2018			September 30, 2017			September 30, 2018			September 30, 2017
Retail originations	$	642,213		$	809,961		$	1,949,036		$	2,398,328
Correspondent originations	310,446			145,999			559,896			414,357
Veterans First originations	199,774			—			518,726			—
Total originations (A)	$	1,152,433		$	955,960		$	3,027,658		$	2,812,685
Purchases as a percentage of originations	76		%	80		%	77		%	78		%
Refinances as a percentage of originations	24			20			23			22
Total	100		%	100		%	100		%	100		%
Production Margin:
Production revenue (1) (B)	$	25,253		$	24,038		$	73,593		$	69,855
Production margin (B/A)	2.19		%	2.51		%	2.43		%	2.48		%
Mortgage Servicing:
Loans serviced for others (C)	$	5,904,300		$	2,622,411
MSRs, at fair value (D)	74,530			29,414
Percentage of MSRs to loans serviced for others (D/C)	1.26		%	1.12		%
Components of Mortgage Banking Revenue:
Production revenue	$	25,253		$	24,038		$	73,593		$	69,855
MSR capitalization, net of payoffs and paydowns	10,249			4,308			19,731			11,531
MSR fair value adjustments	1,077			(2,201		)	7,307			(1,220		)
Servicing income	3,942			1,702			10,352			4,475
Other	1,493			337			1,825			1,420
Total mortgage banking revenue	$	42,014		$	28,184		$	112,808		$	86,061

(1) Production revenue represents revenue earned from the origination and subsequent sale of mortgages, including gains on loans sold and fees from originations, processing and other related activities, and excludes servicing fees, changes in fair value of servicing rights and changes to the mortgage recourse obligation.

The Company has typically written call options with terms of less than three months against certain U.S. Treasury and agency securities held in its portfolio for liquidity and other purposes. Management has effectively entered into these transactions with the goal of economically hedging security positions and enhancing its overall return on its investment portfolio by using fees generated from these options to compensate for net interest margin compression. These option transactions are designed to mitigate overall interest rate risk and do not qualify as hedges pursuant to accounting guidance. There were no outstanding call option contracts at September 30, 2018 and September 30, 2017.

The increase in operating lease income in the current year periods compared to the prior year periods is primarily related to growth in business from the Company's leasing divisions.

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Non-interest Expense

The following table presents non-interest expense by category for the periods presented:

	Three months ended				$ Change		% Change
(Dollars in thousands)	September 30, 2018		September 30, 2017
Salaries and employee benefits:
Salaries	$	69,893	$	57,689	$	12,204	21	%
Commissions and incentive compensation	34,046		32,095		1,951		6
Benefits	19,916		16,467		3,449		21
Total salaries and employee benefits	$	123,855	$	106,251	$	17,604	17	%
Equipment	10,827		9,947		880		9
Operating lease equipment depreciation	7,370		6,794		576		8
Occupancy, net	14,404		13,079		1,325		10
Data processing	9,335		7,851		1,484		19
Advertising and marketing	11,120		9,572		1,548		16
Professional fees	9,914		6,786		3,128		46
Amortization of other intangible assets	1,163		1,068		95		9
FDIC insurance	4,205		3,877		328		8
OREO expense, net	596		590		6		1
Other:
Commissions—3rd party brokers	1,059		990		69		7
Postage	2,205		1,814		391		22
Miscellaneous	17,584		14,956		2,628		18
Total other	$	20,848	$	17,760	$	3,088	17	%
Total Non-Interest Expense	$	213,637	$	183,575	$	30,062	16	%

	Nine months ended				$ Change			% Change
(Dollars in thousands)	September 30, 2018		September 30, 2017
Salaries and employee benefits:
Salaries	$	198,855	$	167,912	$	30,943		18	%
Commissions and incentive compensation	101,902		92,788		9,114			10
Benefits	57,209		51,369		5,840			11
Total salaries and employee benefits	357,966		312,069		45,897			15
Equipment	31,426		28,858		2,568			9
Operating lease equipment depreciation	20,843		17,092		3,751			22
Occupancy, net	41,834		38,766		3,068			8
Data processing	26,580		23,580		3,000			13
Advertising and marketing	31,726		23,448		8,278			35
Professional fees	23,047		18,956		4,091			22
Amortization of other intangible assets	3,164		3,373		(209		)	(6	)
FDIC insurance	13,165		11,907		1,258			11
OREO expense, net	4,502		2,994		1,508			50
Other:
Commissions—3rd party brokers	3,485		3,121		364			12
Postage	6,638		5,336		1,302			24
Miscellaneous	50,379		45,737		4,642			10
Total other	60,502		54,194		6,308			12
Total Non-Interest Expense	$	614,755	$	535,237	$	79,518		15	%

72

Notable contributions to the change in non-interest expense are as follows:

Salaries and employee benefits expense increased in the current period compared to the same period of 2017, primarily as a result of the addition of employees from the CSC and Veterans First acquisition and the growth of the Company, merit-based salary increases for current employees effective in February 2018, an increase of the minimum wage for eligible hourly employees effective in March 2018 and higher bonus and long-term performance-based incentive compensation due to higher earnings.

Operating lease equipment depreciation increased in the current quarter compared to the same period of 2017, primarily as a result of growth in business from the Company's leasing divisions.

Occupancy expense increased in the third quarter of 2018 compared to the same quarter of 2017, primarily as a result of higher maintenance and repairs and real estate taxes. Occupancy expense includes depreciation on premises, real estate taxes and insurance, utilities and maintenance of premises, as well as net rent expense for leased premises.

The increase in advertising and marketing expenses during the current quarter compared to the same period of 2017 is primarily related to higher expenses from community sponsorships as well as increased spending related to deposit generation and brand awareness to grow our loan and deposit portfolios. Marketing costs are incurred to promote the Company's brand, commercial banking capabilities, the Company's various products, to attract loans and deposits and to announce new branch openings as well as the expansion of the Company's non-bank businesses. The level of marketing expenditures depends on the timing of sponsorship programs and type of marketing programs utilized which are determined based on the market area, targeted audience, competition and various other factors.

The increase in professional fees during the current quarter compared to the same period of 2017 is primarily related to higher fees on consulting services. The increase in consulting fees was driven by certain consulting agreements paid in relation to the acquisition of Delaware Place Bank totaling $2.1 million. Approximately $147,000 of additional payments will be made in the fourth quarter related to these agreements. Professional fees include legal, audit and tax fees, external loan review costs, consulting arrangements and normal regulatory exam assessments.

Income Taxes

The Company recorded income tax expense of $30.9 million in the third quarter of 2018 compared to $32.0 million in the second quarter of 2018 and $38.6 million in the third quarter of 2017. The effective tax rates were 25.13% in the third quarter of 2018, 26.33% in the second quarter of 2018 and 37.05% in the third quarter of 2017. During the nine months ended September 30, 2018, the Company recorded income tax expense of $89.0 million (25.24% effective tax rate) compared to $105.3 million (35.79% effective tax rate) for the same period of 2017. The lower effective tax rates for the 2018 quarterly and year-to-date periods as compared to 2017 were primarily due to the reduction of the federal statutory income tax rates effective in 2018 as a result of the enactment of the Tax Cuts and Jobs Act on December 22, 2017. During the third quarter of 2018, the Company finalized the provisional amounts recorded for the year ended December 31, 2017 related to the Tax Cuts and Jobs Act and recorded an additional net tax benefit of $1.2 million. The effective tax rates were also impacted by excess tax benefits related to share-based compensation. These excess tax benefits were $370,000 in the third quarter of 2018 and $712,000 in the second quarter of 2018, compared to $1.1 million in the third quarter of 2017. Excess tax benefits were $3.7 million and $5.0 million for the year to date periods of 2018 and 2017, respectively. Excess tax benefits are expected to be higher in the first quarter when the majority of the Company's share-based awards vest, and will fluctuate throughout the year based on the Company's stock price and timing of employee stock option exercises and vesting of other share-based awards.

73

Operating Segment Results

As described in Note 14 to the Consolidated Financial Statements in Item 1, the Company’s operations consist of three primary segments: community banking, specialty finance and wealth management. The Company’s profitability is primarily dependent on the net interest income, provision for credit losses, non-interest income and operating expenses of its community banking segment. For purposes of internal segment profitability, management allocates certain intersegment and parent company balances. Management allocates a portion of revenues to the specialty finance segment related to loans and leases originated by the specialty finance segment and sold or assigned to the community banking segment. Similarly, for purposes of analyzing the contribution from the wealth management segment, management allocates a portion of the net interest income earned by the community banking segment on deposit balances of customers of the wealth management segment to the wealth management segment. Finally, expenses incurred at the Wintrust parent company are allocated to each segment based on each segment's risk-weighted assets.

The community banking segment’s net interest income for the quarter ended September 30, 2018 totaled $202.4 million as compared to $176.5 million for the same period in 2017, an increase of $25.9 million, or 15%. On a year-to-date basis, net interest income for the segment increased by $84.8 million from $499.1 million for the nine months ended September 30, 2017 to $583.9 million for the nine months ended September 30, 2018. The increase in both three and nine month periods is primarily attributable to growth in earning assets and higher net interest margin. The community banking segment’s non-interest income totaled $69.8 million in the third quarter of 2018, an increase of $17.2 million, or 33%, when compared to the third quarter of 2017 total of $52.6 million. On a year-to-date basis, non-interest income totaled $192.0 million for the nine months ended September 30, 2018, an increase of $31.8 million, or 20%, compared to $160.3 million in the nine months ended September 30, 2017. The increase in non-interest income in the third quarter and year-to-date periods was primarily attributable to an increase in mortgage banking revenue, higher interest rate swap fees and increased service charges on deposit accounts. The community banking segment’s net income for the quarter ended September 30, 2018 totaled $63.7 million, an increase of $18.9 million as compared to net income in the third quarter of 2017 of $44.8 million. On a year-to-date basis, the community banking segment's net income was $187.4 million for the first nine months of 2018 as compared to $128.5 million for the first nine months of 2017.

The specialty finance segment's net interest income totaled $36.4 million for the quarter ended September 30, 2018, compared to $30.5 million for the same period in 2017, an increase of $5.9 million, or 19%. On a year-to-date basis, net interest income increased by $14.2 million in the first nine months of 2018 as compared to the first nine months of 2017. The increase during both periods is primarily attributable to growth in earning assets and higher yields on the premium finance receivables portfolios. The specialty finance segment’s non-interest income totaled $17.0 million and $16.3 million for the three month periods ended September 30, 2018 and 2017, respectively. On a year-to-date basis, non-interest income increased by $4.8 million in the first nine months of 2018 as compared to the first nine months of 2017. The increase in non-interest income in the current year periods is primarily the result of higher originations and increased balances related to the commercial premium finance portfolio and growth in business from the Company's leasing division. Our commercial premium finance operations, life insurance finance operations, lease financing operations and accounts receivable finance operations accounted for 40%, 36%, 18% and 6%, respectively, of the total revenues of our specialty finance business for the nine month period ended September 30, 2018. The net income of the specialty finance segment for the quarter ended September 30, 2018 totaled $23.0 million as compared to $17.0 million for the quarter ended September 30, 2017. On a year-to-date basis, the net income of the specialty finance segment for the nine months ended September 30, 2018 totaled $61.5 million as compared to $48.0 million for the nine months ended September 30, 2017.

The wealth management segment reported net interest income of $4.0 million for the third quarter of 2018 compared to $4.6 million in the same quarter of 2017. On a year-to-date basis, net interest income totaled $12.7 million for the first nine months of 2018 as compared to $14.5 million for the first nine months of 2017. Net interest income for this segment is primarily comprised of an allocation of the net interest income earned by the community banking segment on non-interest bearing and interest-bearing wealth management customer account balances on deposit at the banks. Wealth management customer account balances on deposit at the banks averaged $874.8 million and $1.0 billion in the first nine months of 2018 and 2017, respectively. This segment recorded non-interest income of $23.5 million for the third quarter of 2018 compared to $20.4 million for the third quarter of 2017. On a year-to-date basis, the wealth management segment's non-interest income totaled $69.8 million during the first nine months of 2018 as compared to $61.7 million in the first nine months of 2017. Distribution of wealth management services through each bank continues to be a focus of the Company as the number of financial advisors in its banks continues to increase. The Company is committed to growing the wealth management segment in order to better service its customers and create a more diversified revenue stream. The wealth management segment’s net income totaled $5.2 million for the third quarter of 2018 compared to $3.8 million for the third quarter of 2017. On a year-to-date basis, the wealth management segment's net income totaled $14.6 million and $12.4 million for the nine month periods ended September 30, 2018 and 2017, respectively.

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Financial Condition

Total assets were $30.1 billion at September 30, 2018, representing an increase of $2.8 billion, or 10%, when compared to September 30, 2017 and an increase of approximately $0.7 billion, or 9% on an annualized basis, when compared to June 30, 2018. Total funding, which includes deposits, all notes and advances, including secured borrowings and the junior subordinated debentures, was $26.3 billion at September 30, 2018, $25.7 billion at June 30, 2018, and $24.0 billion at September 30, 2017. See Notes 5, 6, 10, 11 and 12 of the Consolidated Financial Statements presented under Item 1 of this report for additional period-end detail on the Company’s interest-earning assets and funding liabilities.

Interest-Earning Assets

The following table sets forth, by category, the composition of average earning asset balances and the relative percentage of total average earning assets for the periods presented:

	Three Months Ended
	September 30, 2018				June 30, 2018				September 30, 2017
(Dollars in thousands)	Balance		Percent		Balance		Percent		Balance		Percent
Mortgage loans held-for-sale	$	380,235	1	%	$	403,967	2	%	$	336,604	1	%
Loans, net of unearned income
Commercial	7,337,150		27		7,167,150		27		6,399,589		26
Commercial real estate	6,658,800		24		6,624,140		25		6,401,278		26
Home equity	589,242		2		609,455		2		679,668		2
Residential real estate	847,703		3		834,633		3		778,033		3
Premium finance receivables	7,257,505		27		6,912,264		26		6,470,190		26
Other loans	132,978		1		135,899		1		129,860		1
Total loans, net of unearned income excluding covered loans	$	22,823,378	84	%	$	22,283,541	84	%	$	20,858,618	84	%
Covered loans	—		—		—		—		48,415		—
Total average loans (1)	$	22,823,378	84	%	$	22,283,541	84	%	$	20,907,033	84	%
Liquidity management assets (2)	$	4,132,611	15	%	$	3,765,372	14	%	$	3,737,619	15	%
Other earning assets (3)	17,862		—		21,244		—		25,844		—
Total average earning assets	$	27,354,086	100	%	$	26,474,124	100	%	$	25,007,100	100	%
Total average assets	$	29,525,109			$	28,567,579			$	27,012,295
Total average earning assets to total average assets			93	%			93	%			93	%

(1) Includes non-accrual loans

(2) Liquidity management assets include investment securities, other securities, interest earning deposits with banks, federal funds sold and securities purchased under resale agreements

(3) Other earning assets include brokerage customer receivables and trading account securities

Mortgage loans held-for-sale. Average mortgage loans held-for-sale totaled $380.2 million in the third quarter of 2018, compared to $404.0 million in the second quarter of 2018 and $336.6 million in the third quarter of 2017. By selling residential mortgage loans into the secondary market, the Company eliminates the interest-rate risk associated with these loans, as they are predominantly long-term fixed rate loans, and provides a source of non-interest revenue.

Loans, net of unearned income. Average total loans, net of unearned income, totaled $22.8 billion in the third quarter of 2018, increasing $1.9 billion, or 9%, from the third quarter of 2017 and $539.8 million, or 10% on an annualized basis, from the second quarter of 2018. Combined, the commercial and commercial real estate loan categories comprised 61% of the average loan portfolio in both of the third quarter of 2018 and 2017. Growth realized in these categories for the third quarter of 2018 as compared to the sequential and prior year periods is primarily attributable to increased business development efforts and the acquisition of CSC.

Home equity loan portfolio averaged $589.2 million in the third quarter of 2018, and decreased $90.4 million, or 13% from the average balance of $679.7 million in same period of 2017. The Company has been actively managing its home equity portfolio to ensure that diligent pricing, appraisal and other underwriting activities continue to exist.

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Residential real estate loans averaged $847.7 million in the third quarter of 2018, and increased $69.7 million, or 9% from the average balance of $778.0 million in same period of 2017. Additionally, compared to the quarter ended June 30, 2018, the average balance increased $13.1 million, or 6% on an annualized basis. The Company's residential real estate portfolio predominantly includes one- to four-family adjustable rate mortgage loans that have repricing terms generally from one to three years, construction loans to individuals and bridge financing loans for qualifying customers.

Average premium finance receivables totaled $7.3 billion in the third quarter of 2018, and accounted for 32% of the Company’s average total loans. The increase during the third quarter of 2018 compared to both the second quarter of 2018 and the third quarter of 2017 was the result of continued originations within the portfolio due to the effective marketing and customer servicing. Approximately $1.9 billion of premium finance receivables were originated in the third quarter of 2018 compared to $1.8 billion during the same period of 2017. Premium finance receivables consist of a commercial portfolio and a life portfolio comprising approximately 40% and 60%, respectively, of the average total balance of premium finance receivables for the third quarter of 2018, and 42% and 58%, respectively, for the third quarter of 2017.

Other loans represent a wide variety of personal and consumer loans to individuals as well as high-yielding short-term accounts receivable financing to clients in the temporary staffing industry located throughout the United States. Consumer loans generally have shorter terms and higher interest rates than mortgage loans but generally involve more credit risk due to the type and nature of the collateral. Additionally, short-term accounts receivable financing may also involve greater credit risks than generally associated with the loan portfolios of more traditional community banks depending on the marketability of the collateral.

Covered loans represented loans acquired through eight FDIC-assisted transactions, all of which occurred prior to 2013. These loans were subject to loss sharing agreements with the FDIC. The FDIC agreed to reimburse the Company for 80% of losses incurred on the purchased loans, foreclosed real estate, and certain other assets. On October 16, 2017, the Company entered into agreements with the FDIC that terminated all existing loss share agreements with the FDIC. The Company is solely responsible for all future charge-offs, recoveries, gains, losses and expenses related to the previously covered assets as the FDIC no longer shares in those amounts. See Note 3 of the Consolidated Financial Statements presented under Item 1 of this report for a discussion of these acquisitions, including the aggregation of these loans by risk characteristics when determining the initial and subsequent fair value.

Liquidity management assets. Funds that are not utilized for loan originations are used to purchase investment securities and short term money market investments, to sell as federal funds and to maintain in interest bearing deposits with banks. The balances of these assets can fluctuate based on management’s ongoing effort to manage liquidity and for asset liability management purposes.

Other earning assets. Other earning assets include brokerage customer receivables and trading account securities. In the normal course of business, Wintrust Investments activities involve the execution, settlement, and financing of various securities transactions. Wintrust Investments customer securities activities are transacted on either a cash or margin basis. In margin transactions, Wintrust Investments, under an agreement with an out-sourced securities firm, extends credit to its customers, subject to various regulatory and internal margin requirements, collateralized by cash and securities in customer’s accounts. In connection with these activities, Wintrust Investments executes and the out-sourced firm clears customer transactions relating to the sale of securities not yet purchased, substantially all of which are transacted on a margin basis subject to individual exchange regulations. Such transactions may expose Wintrust Investments to off-balance-sheet risk, particularly in volatile trading markets, in the event margin requirements are not sufficient to fully cover losses that customers may incur. In the event a customer fails to satisfy its obligations, Wintrust Investments under the agreement with the outsourced securities firm, may be required to purchase or sell financial instruments at prevailing market prices to fulfill the customer’s obligations. Wintrust Investments seeks to control the risks associated with its customers’ activities by requiring customers to maintain margin collateral in compliance with various regulatory and internal guidelines. Wintrust Investments monitors required margin levels daily and, pursuant to such guidelines, requires customers to deposit additional collateral or to reduce positions when necessary.

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The following table sets forth, by category, the composition of average earning asset balances and the relative percentage of total average earning assets for the periods presented:

	Nine Months Ended
	September 30, 2018				September 30, 2017
(Dollars in thousands)	Balance		Percent		Balance		Percent
Mortgage loans held-for-sale	$	355,491	1	%	$	313,675	1	%
Loans:
Commercial	7,115,633		27		6,173,563		26
Commercial real estate	6,624,613		25		6,306,508		26
Home equity	615,623		2		698,956		3
Residential real estate	837,389		3		747,487		3
Premium finance receivables	6,952,069		26		6,211,151		26
Other loans	131,500		1		126,167		1
Total loans, net of unearned income excluding covered loans	$	22,276,827	84	%	$	20,263,832	85	%
Covered loans	—		—		52,339		—
Total average loans (1)	$	22,276,827	84	%	$	20,316,171	85	%
Liquidity management assets (2)	$	3,883,405	15	%	$	3,469,208	14	%
Other earning assets (3)	22,190		—		25,612		—
Total average earning assets	$	26,537,913	100	%	$	24,124,666	100	%
Total average assets	$	28,640,380			$	26,096,809
Total average earning assets to total average assets			93	%			92	%

(1) Includes non-accrual loans

(2) Liquidity management assets include investment securities, other securities, interest earning deposits with banks, federal funds sold and securities purchased under resale agreements

(3) Other earning assets include brokerage customer receivables and trading account securities

Total average loans for the first nine months of 2018 increased $2.0 billion or 10% over the previous year period. Similar to the quarterly discussion above, approximately $942.1 million of this increase relates to the commercial portfolio, $318.1 million of this increase relates to the commercial real estate portfolio and $740.9 million of this increase relates to the premium finance receivables portfolio.

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LOAN PORTFOLIO AND ASSET QUALITY

Loan Portfolio

The following table shows the Company’s loan portfolio by category as of the dates shown:

	September 30, 2018				December 31, 2017				September 30, 2017
			% of				% of				% of
(Dollars in thousands)	Amount		Total		Amount		Total		Amount		Total
Commercial	$	7,473,958	32	%	$	6,787,677	31	%	$	6,456,034	31	%
Commercial real estate	6,746,774		29		6,580,618		30		6,400,781		31
Home equity	578,844		3		663,045		3		672,969		3
Residential real estate	924,250		4		832,120		4		789,499		3
Premium finance receivables—commercial	2,885,327		12		2,634,565		12		2,664,912		13
Premium finance receivables—life insurance	4,398,971		19		4,035,059		19		3,795,474		18
Consumer and other	115,827		1		107,713		1		133,112		1
Total loans, net of unearned income, excluding covered loans	$	23,123,951	100	%	$	21,640,797	100	%	$	20,912,781	100	%
Covered loans	—		—		—		—		46,601		—
Total loans	$	23,123,951	100	%	$	21,640,797	100	%	$	20,959,382	100	%

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Commercial and commercial real estate loans. Our commercial and commercial real estate loan portfolios are comprised primarily of commercial real estate loans and lines of credit for working capital purposes. The table below sets forth information regarding the types and amounts of our loans within these portfolios (excluding covered loans) as of September 30, 2018 and 2017:

	As of September 30, 2018						As of September 30, 2017
					Allowance						Allowance
			% of		For Loan				% of		For Loan
			Total		Losses				Total		Losses
(Dollars in thousands)	Balance		Balance		Allocation		Balance		Balance		Allocation
Commercial:
Commercial, industrial and other	$	4,805,486	33.8	%	$	45,111	$	4,120,533	32.0	%	$	38,708
Franchise	937,290		6.6		8,962		853,716		6.6		6,154
Mortgage warehouse lines of credit	171,860		1.2		1,350		194,370		1.5		1,438
Asset-based lending	1,033,851		7.3		9,389		896,336		7.0		7,683
Leases	509,675		3.6		1,338		381,394		3.0		1,208
PCI - commercial loans (1)	15,796		0.1		594		9,685		0.1		544
Total commercial	$	7,473,958	52.6	%	$	66,744	$	6,456,034	50.2	%	$	55,735
Commercial Real Estate:
Construction	$	798,330	5.6	%	$	9,259	$	673,977	5.2	%	$	7,565
Land	119,004		0.9		3,816		102,753		0.8		3,354
Office	940,777		6.6		6,339		880,951		6.9		6,249
Industrial	885,931		6.2		6,002		836,485		6.5		5,538
Retail	887,702		6.2		8,195		934,239		7.3		6,107
Multi-family	923,893		6.5		8,900		864,985		6.7		8,873
Mixed use and other	2,086,455		14.7		15,717		1,974,315		15.4		14,270
PCI - commercial real estate (1)	104,682		0.7		18		133,076		1.0		84
Total commercial real estate	$	6,746,774	47.4	%	$	58,246	$	6,400,781	49.8	%	$	52,040
Total commercial and commercial real estate	$	14,220,732	100.0	%	$	124,990	$	12,856,815	100.0	%	$	107,775
Commercial real estate - collateral location by state:
Illinois	$	5,213,719	77.3	%			$	4,981,379	77.8	%
Wisconsin	694,205		10.3				683,229		10.7
Total primary markets	$	5,907,924	87.6	%			$	5,664,608	88.5	%
Indiana	151,725		2.2				140,749		2.2
Florida	50,819		0.8				114,599		1.8
Arizona	58,880		0.9				58,192		0.9
Michigan	45,502		0.7				44,664		0.7
California	54,692		0.8				36,366		0.6
Other	477,232		7.0				341,603		5.3
Total	$	6,746,774	100.0	%			$	6,400,781	100.0	%

(1) PCI loans represent loans acquired with evidence of credit quality deterioration since origination, in accordance with ASC 310-30. Loan agings are based upon contractually required payments.

We make commercial loans for many purposes, including working capital lines, which are generally renewable annually and supported by business assets, personal guarantees and additional collateral. Commercial business lending is generally considered to involve a slightly higher degree of risk than traditional consumer bank lending. Primarily as a result of growth in the commercial portfolio, our allowance for loan losses in our commercial loan portfolio is $66.7 million as of September 30, 2018 compared to $55.7 million as of September 30, 2017.

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Our commercial real estate loans are generally secured by a first mortgage lien and assignment of rents on the property. Since most of our bank branches are located in the Chicago metropolitan area and southern Wisconsin, 87.6% of our commercial real estate loan portfolio is located in this region as of September 30, 2018. While commercial real estate market conditions are generally considered to be good, a few of our specific markets have stress conditions. We have been able to effectively manage our total non-performing commercial real estate loans. As of September 30, 2018, our allowance for loan losses related to this portfolio is $58.2 million compared to $52.0 million as of September 30, 2017.

The Company also participates in mortgage warehouse lending by providing interim funding to unaffiliated mortgage bankers to finance residential mortgages originated by such bankers for sale into the secondary market. The Company’s loans to the mortgage bankers are secured by the business assets of the mortgage companies as well as the specific mortgage loans funded by the Company, after they have been pre-approved for purchase by third party end lenders. The Company may also provide interim financing for packages of mortgage loans on a bulk basis in circumstances where the mortgage bankers desire to competitively bid on a number of mortgages for sale as a package in the secondary market. Amounts advanced with respect to any particular mortgage loan are usually required to be repaid within 21 days. Mortgage warehouse lines portfolio totaled $171.9 million as of September 30, 2018 compared to $194.4 million as of September 30, 2017.

Home equity loans. Our home equity loans and lines of credit are originated by each of our banks in their local markets where we have a strong understanding of the underlying real estate value. Our banks monitor and manage these loans, and we conduct an automated review of all home equity loans and lines of credit at least twice per year. This review collects current credit performance for each home equity borrower and identifies situations where the credit strength of the borrower is declining, or where there are events that may influence repayment, such as tax liens or judgments. Our banks use this information to manage loans that may be higher risk and to determine whether to obtain additional credit information or updated property valuations.

The rates we offer on new home equity lending are based on several factors, including appraisals and valuation due diligence, in order to reflect inherent risk, and we place additional scrutiny on larger home equity requests. In a limited number of cases, we issue home equity credit together with first mortgage financing, and requests for such financing are evaluated on a combined basis. It is not our practice to advance more than 85% of the appraised value of the underlying asset, which ratio we refer to as the loan-to-value ratio, or LTV ratio, and a majority of the credit we previously extended, when issued, had an LTV ratio of less than 80%.

Our home equity loan portfolio has performed well in light of the ongoing volatility in the overall residential real estate market.

Residential real estate. Our residential real estate portfolio predominantly includes one- to four-family adjustable rate mortgages that have repricing terms generally from one to three years, construction loans to individuals and bridge financing loans for qualifying customers. As of September 30, 2018, our residential loan portfolio totaled $924.3 million, or 4% of our total outstanding loans.

Our adjustable rate mortgages relate to properties located principally in the Chicago metropolitan area and southern Wisconsin or vacation homes owned by local residents. These adjustable rate mortgages are often non-agency conforming. Adjustable rate mortgage loans decrease the interest rate risk we face on our mortgage portfolio. However, this risk is not eliminated due to the fact that such loans generally provide for periodic and lifetime limits on the interest rate adjustments among other features. Additionally, adjustable rate mortgages may pose a higher risk of delinquency and default because they require borrowers to make larger payments when interest rates rise. As of September 30, 2018, $16.1 million of our residential real estate mortgages, or 1.7% of our residential real estate loan portfolio were classified as nonaccrual, $1.9 million were 90 or more days past due and still accruing (0.2%), $2.3 million were 30 to 89 days past due (0.3%) and $904.0 million were current (97.8%). We believe that since our loan portfolio consists primarily of locally originated loans, and since the majority of our borrowers are longer-term customers with lower LTV ratios, we face a relatively low risk of borrower default and delinquency.

While we generally do not originate loans for our own portfolio with long-term fixed rates due to interest rate risk considerations, we can accommodate customer requests for fixed rate loans by originating such loans and then selling them into the secondary market, for which we receive fee income. We may also selectively retain certain of these loans within the banks’ own portfolios where they are non-agency conforming, or where the terms of the loans make them favorable to retain. A portion of the loans we sold into the secondary market were sold with the servicing of those loans retained. The amount of loans serviced for others as of September 30, 2018 and 2017 was $5.9 billion and $2.6 billion, respectively. All other mortgage loans sold into the secondary market were sold without the retention of servicing rights.

The Government National Mortgage Association ("GNMA") optional repurchase programs allow financial institutions acting as servicers to buy back individual delinquent mortgage loans that meet certain criteria from the securitized loan pool for which the institution was the original transferor of such loans. At the option of the servicer and without prior authorization from GNMA, the servicer may repurchase such delinquent loans for an amount equal to the remaining principal balance of the loan. Under FASB

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ASC Topic 860, “Transfers and Servicing,” this buy-back option is considered a conditional option until the delinquency criteria are met, at which time the option becomes unconditional. When the Company is deemed to have regained effective control over these loans under the unconditional buy-back option and the expected benefit of the potential buy-back is more than trivial, the loans can no longer be reported as sold and must be brought back onto the balance sheet as loans, regardless of whether the Company intends to exercise the buy-back option. These loans are reported as loans held-for-investment, part of the residential real estate portfolio, with the offsetting liability being reported in accrued interest payable and other liabilities. Rebooked GNMA loans held-for-investment amounted to $64.4 million at September 30, 2018, compared to no balance at September 30, 2017.

It is not our current practice to underwrite, and we have no plans to underwrite, subprime, Alt A, no or little documentation loans, or option ARM loans. As of September 30, 2018, approximately $1.3 million of our mortgage loans consist of interest-only loans.

Premium finance receivables – commercial. FIRST Insurance Funding and FIFC Canada originated approximately $1.7 billion in commercial insurance premium finance receivables in the third quarter of 2018 as compared to $1.6 billion of originations in the third quarter of 2017. During the nine months endedSeptember 30, 2018 and 2017, FIRST Insurance Funding and FIFC Canada originated approximately $5.1 billion and $4.6 billion, respectively, in commercial insurance premium finance receivables

FIRST Insurance Funding and FIFC Canada make loans to businesses to finance the insurance premiums they pay on their commercial insurance policies. The loans are originated by working through independent medium and large insurance agents and brokers located throughout the United States and Canada. The insurance premiums financed are primarily for commercial customers’ purchases of liability, property and casualty and other commercial insurance.

This lending involves relatively rapid turnover of the loan portfolio and high volume of loan originations. Because of the indirect nature of this lending through third party agents and brokers and because the borrowers are located nationwide and in Canada, this segment is more susceptible to third party fraud than relationship lending. The Company performs ongoing credit and other reviews of the agents and brokers, and performs various internal audit steps to mitigate against the risk of any fraud. The majority of these loans are purchased by the banks in order to more fully utilize their lending capacity as these loans generally provide the banks with higher yields than alternative investments.

Premium finance receivables—life insurance. Wintrust Life Finance originated approximately $200.0 million in life insurance premium finance receivables in the third quarter of 2018 as compared to$205.9 million of originations in the third quarter of 2017. During the nine months endedSeptember 30, 2018 and 2017, Wintrust Life Finance originated approximately $654.6 million and $653.1 million, respectively, in life insurance premium finance receivables.

The Company continues to experience increased competition and pricing pressure within the current market. These loans are originated directly with the borrowers with assistance from life insurance carriers, independent insurance agents, financial advisors and legal counsel. The life insurance policy is the primary form of collateral. In addition, these loans often are secured with a letter of credit, marketable securities or certificates of deposit. In some cases, Wintrust Life Finance may make a loan that has a partially unsecured position.

Consumer and other. Included in the consumer and other loan category is a wide variety of personal and consumer loans to individuals as well as high yielding short-term accounts receivable financing to clients in the temporary staffing industry located throughout the United States. The Banks originate consumer loans in order to provide a wider range of financial services to their customers.

Consumer loans generally have shorter terms and higher interest rates than mortgage loans but generally involve more credit risk than mortgage loans due to the type and nature of the collateral. Additionally, short-term accounts receivable financing may also involve greater credit risks than generally associated with the loan portfolios of more traditional community banks depending on the marketability of the collateral.

Covered loans. Covered loans represent loans acquired through eight FDIC-assisted transactions, all of which occurred prior to 2013. These loans were subject to loss sharing agreements with the FDIC. The FDIC agreed to reimburse the Company for 80% of losses incurred on the purchased loans, foreclosed real estate, and certain other assets. On October 16, 2017, the Company entered into agreements with the FDIC that terminated all existing loss share agreements with the FDIC. Starting on October 16,

2017, the Company is solely responsible for all charge-offs, recoveries, gains, losses and expenses related to the previously covered assets as the FDIC no longer shares in those amounts. See Note 3 of the Consolidated Financial Statements presented under Item 1 of this report for a discussion of these acquisitions, including the aggregation of these loans by risk characteristics when determining the initial and subsequent fair value.

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Maturities and Sensitivities of Loans to Changes in Interest Rates

The following table classifies the loan portfolio at September 30, 2018 by date at which the loans reprice or mature, and the type of rate exposure:

As of September 30, 2018	One year or less		From one to five years		Over five years
(Dollars in thousands)							Total
Commercial
Fixed rate	$	140,679	$	1,016,116	$	691,306	$	1,848,101
Variable rate	5,619,143		6,714		—		5,625,857
Total commercial	$	5,759,822	$	1,022,830	$	691,306	$	7,473,958
Commercial real estate
Fixed rate	378,163		1,860,693		283,884		2,522,740
Variable rate	4,194,363		28,461		1,210		4,224,034
Total commercial real estate	$	4,572,526	$	1,889,154	$	285,094	$	6,746,774
Home equity
Fixed rate	10,787		11,906		27,167		49,860
Variable rate	528,984		—		—		528,984
Total home equity	$	539,771	$	11,906	$	27,167	$	578,844
Residential real estate
Fixed rate	32,621		23,239		206,214		262,074
Variable rate	60,733		274,323		327,120		662,176
Total residential real estate	$	93,354	$	297,562	$	533,334	$	924,250
Premium finance receivables - commercial
Fixed rate	2,811,527		73,800		—		2,885,327
Variable rate	—		—		—		—
Total premium finance receivables - commercial	$	2,811,527	$	73,800	$	—	$	2,885,327
Premium finance receivables - life insurance
Fixed rate	12,739		2,855		3,955		19,549
Variable rate	4,379,422		—		—		4,379,422
Total premium finance receivables - life insurance	$	4,392,161	$	2,855	$	3,955	$	4,398,971
Consumer and other
Fixed rate	70,151		9,729		2,313		82,193
Variable rate	33,592		42		—		33,634
Total consumer and other	$	103,743	$	9,771	$	2,313	$	115,827
Total per category
Fixed rate	3,456,667		2,998,338		1,214,839		7,669,844
Variable rate	14,816,237		309,540		328,330		15,454,107
Total loans, net of unearned income, excluding covered loans	$	18,272,904	$	3,307,878	$	1,543,169	$	23,123,951
Variable Rate Loan Pricing by Index:
Prime	$	2,457,259
One- month LIBOR	7,772,158
Three- month LIBOR	457,638
Twelve- month LIBOR	4,529,883
Other	237,169
Total variable rate	$	15,454,107

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Past Due Loans and Non-Performing Assets

Our ability to manage credit risk depends in large part on our ability to properly identify and manage problem loans. To do so, the Company operates a credit risk rating system under which our credit management personnel assign a credit risk rating to each loan at the time of origination and review loans on a regular basis to determine each loan’s credit risk rating on a scale of 1 through 10 with higher scores indicating higher risk. The credit risk rating structure used is shown below:

1 Rating —	Minimal Risk (Loss Potential – none or extremely low) (Superior asset quality, excellent liquidity, minimal leverage)
2 Rating —	Modest Risk (Loss Potential demonstrably low) (Very good asset quality and liquidity, strong leverage capacity)
3 Rating —	Average Risk (Loss Potential low but no longer refutable) (Mostly satisfactory asset quality and liquidity, good leverage capacity)
4 Rating —	Above Average Risk (Loss Potential variable, but some potential for deterioration) (Acceptable asset quality, little excess liquidity, modest leverage capacity)
5 Rating —	Management Attention Risk (Loss Potential moderate if corrective action not taken) (Generally acceptable asset quality, somewhat strained liquidity, minimal leverage capacity)
6 Rating —	Special Mention (Loss Potential moderate if corrective action not taken) (Assets in this category are currently protected, potentially weak, but not to the point of substandard classification)
7 Rating —	Substandard Accrual (Loss Potential distinct possibility that the bank may sustain some loss, but no discernable impairment) (Must have well defined weaknesses that jeopardize the liquidation of the debt)
8 Rating —	Substandard Non-accrual (Loss Potential well documented probability of loss, including potential impairment) (Must have well defined weaknesses that jeopardize the liquidation of the debt)
9 Rating —	Doubtful (Loss Potential extremely high) (These assets have all the weaknesses in those classified “substandard” with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of current existing facts, conditions, and values, highly improbable)
10 Rating —	Loss (fully charged-off) (Loans in this category are considered fully uncollectible.)

Each loan officer is responsible for monitoring his or her loan portfolio, recommending a credit risk rating for each loan in his or her portfolio and ensuring the credit risk ratings are appropriate. These credit risk ratings are then ratified by the bank’s chief credit officer and/or concurrence credit officer. Credit risk ratings are determined by evaluating a number of factors including a borrower’s financial strength, cash flow coverage, collateral protection and guarantees. A third party loan review firm independently reviews a significant portion of the loan portfolio at each of the Company’s subsidiary banks to evaluate the appropriateness of the management-assigned credit risk ratings. These ratings are subject to further review at each of our bank subsidiaries by the applicable regulatory authority, including the FRB of Chicago, the OCC, the State of Illinois and the State of Wisconsin and are also reviewed by our internal audit staff.

The Company’s problem loan reporting system automatically includes all loans with credit risk ratings of 6 through 9. This system is designed to provide an on-going detailed tracking mechanism for each problem loan. Once management determines that a loan has deteriorated to a point where it has a credit risk rating of 6 or worse, the Company’s Managed Asset Division performs an overall credit and collateral review. As part of this review, all underlying collateral is identified and the valuation methodology is analyzed and tracked. As a result of this initial review by the Company’s Managed Asset Division, the credit risk rating is reviewed and a portion of the outstanding loan balance may be deemed uncollectible or an impairment reserve may be established. The Company’s impairment analysis utilizes an independent re-appraisal of the collateral (unless such a third-party evaluation is not possible due to the unique nature of the collateral, such as a closely-held business or thinly traded securities). In the case of commercial real estate collateral, an independent third party appraisal is ordered by the Company’s Real Estate Services Group to determine if there has been any change in the underlying collateral value. These independent appraisals are reviewed by the Real Estate Services Group and sometimes by independent third party valuation experts and may be adjusted depending upon market conditions. An appraisal is ordered at least once a year for these loans, or more often if market conditions dictate. In the event that the underlying value of the collateral cannot be easily determined, a detailed valuation methodology is prepared by the Managed Asset Division. A summary of this analysis is provided to the directors’ loan committee of the bank which originated the credit for approval of a charge-off, if necessary.

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Through the credit risk rating process, loans are reviewed to determine if they are performing in accordance with the original contractual terms. If the borrower has failed to comply with the original contractual terms, further action may be required by the Company, including a downgrade in the credit risk rating, movement to non-accrual status, a charge-off or the establishment of a specific impairment reserve. In the event a collateral shortfall is identified during the credit review process, the Company will work with the borrower for a principal reduction and/or a pledge of additional collateral and/or additional guarantees. In the event that these options are not available, the loan may be subject to a downgrade of the credit risk rating. If we determine that a loan amount or portion thereof, is uncollectible the loan’s credit risk rating is immediately downgraded to an 8 or 9 and the uncollectible amount is charged-off. Any loan that has a partial charge-off continues to be assigned a credit risk rating of an 8 or 9 for the duration of time that a balance remains outstanding. The Managed Asset Division undertakes a thorough and ongoing analysis to determine if additional impairment and/or charge-offs are appropriate and to begin a workout plan for the credit to minimize actual losses.

The Company’s approach to workout plans and restructuring loans is built on the credit-risk rating process. A modification of a loan with an existing credit risk rating of 6 or worse or a modification of any other credit, which will result in a restructured credit risk rating of 6 or worse must be reviewed for TDR classification. In that event, our Managed Assets Division conducts an overall credit and collateral review. A modification of a loan is considered to be a TDR if both (1) the borrower is experiencing financial difficulty and (2) for economic or legal reasons, the bank grants a concession to a borrower that it would not otherwise consider. The modification of a loan where the credit risk rating is 5 or better both before and after such modification is not considered to be a TDR. Based on the Company’s credit risk rating system, it considers that borrowers whose credit risk rating is 5 or better are not experiencing financial difficulties and therefore, are not considered TDRs.

TDRs, which are by definition considered impaired loans, are reviewed at the time of modification and on a quarterly basis to determine if a specific reserve is needed. The carrying amount of the loan is compared to the expected payments to be received, discounted at the loan’s original rate, or for collateral dependent loans, to the fair value of the collateral less the estimated cost to sell. Any shortfall is recorded as a specific reserve.

For non-TDR loans, if based on current information and events, it is probable that the Company will be unable to collect all amounts due to it according to the contractual terms of the loan agreement, a loan is considered impaired, and a specific impairment reserve analysis is performed and if necessary, a specific reserve is established. In determining the appropriate reserve for collateral-dependent loans, the Company considers the results of appraisals for the associated collateral.

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Non-performing Assets, excluding covered assets

The following table sets forth Wintrust’s non-performing assets and TDRs performing under the contractual terms of the loan agreement, excluding covered assets and PCI loans, as of the dates shown:

(Dollars in thousands)	September 30, 2018			June 30, 2018			December 31, 2017 (3)			September 30, 2017
Loans past due greater than 90 days and still accruing (1):
Commercial	$	5,122		$	—		$	—		$	—
Commercial real estate	—			—			—			—
Home equity	—			—			—			—
Residential real estate	—			—			3,278			—
Premium finance receivables—commercial	7,028			5,159			9,242			9,584
Premium finance receivables—life insurance	—			—			—			6,740
Consumer and other	233			224			40			159
Total loans past due greater than 90 days and still accruing	12,383			5,383			12,560			16,483
Non-accrual loans (2):
Commercial	58,587			18,388			15,696			13,931
Commercial real estate	17,515			19,195			22,048			14,878
Home equity	8,523			9,096			8,978			7,581
Residential real estate	16,062			15,825			17,977			14,743
Premium finance receivables—commercial	13,802			14,832			12,163			9,827
Premium finance receivables—life insurance	—			—			—			—
Consumer and other	355			563			740			540
Total non-accrual loans	114,844			77,899			77,602			61,500
Total non-performing loans:
Commercial	63,709			18,388			15,696			13,931
Commercial real estate	17,515			19,195			22,048			14,878
Home equity	8,523			9,096			8,978			7,581
Residential real estate	16,062			15,825			21,255			14,743
Premium finance receivables—commercial	20,830			19,991			21,405			19,411
Premium finance receivables—life insurance	—			—			—			6,740
Consumer and other	588			787			780			699
Total non-performing loans	$	127,227		$	83,282		$	90,162		$	77,983
Other real estate owned	14,924			18,925			20,244			17,312
Other real estate owned—from acquisitions	13,379			16,406			20,402			20,066
Other repossessed assets	294			305			153			301
Total non-performing assets	$	155,824		$	118,918		$	130,961		$	115,662
TDRs performing under the contractual terms of the loan agreement	31,487			57,249			39,683			26,972
Total non-performing loans by category as a percent of its own respective category’s period-end balance:
Commercial	0.85		%	0.25		%	0.23		%	0.22		%
Commercial real estate	0.26			0.29			0.34			0.23
Home equity	1.47			1.53			1.35			1.13
Residential real estate	1.74			1.77			2.55			1.87
Premium finance receivables—commercial	0.72			0.71			0.81			0.73
Premium finance receivables—life insurance	—			—			—			0.18
Consumer and other	0.51			0.65			0.72			0.53
Total non-performing loans	0.55		%	0.37		%	0.42		%	0.37		%
Total non-performing assets, as a percentage of total assets	0.52		%	0.40		%	0.47		%	0.42		%
Allowance for loan losses as a percentage of total non-performing loans	117.71		%	172.19		%	152.95		%	170.70		%

(1) Loans past due greater than 90 days and still accruing interest included TDRs totaling $5.1 million as of September 30, 2018. As of June 30, 2018, December 31, 2017 and September 30, 2017, no TDRs were past due greater than 90 days and still accruing interest.

(2) Non-accrual loans included TDRs totaling $34.7 million, $8.1 million, $10.1 million and $6.2 million as of September 30, 2018, June 30, 2018, December 31, 2017 and September 30, 2017 respectively.

(3) Includes $2.6 million of non-performing loans and $2.9 million of other real estate owned reclassified from covered assets

as a result of the termination of all existing loss share agreements with the FDIC during the fourth quarter of 2017.

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Management is pursuing the resolution of all credits in this category. At this time, management believes reserves are appropriate to absorb inherent losses that are expected upon the ultimate resolution of these credits.

Loan Portfolio Aging

The tables below show the aging of the Company’s loan portfolio at September 30, 2018 and June 30, 2018:

	Nonaccrual		90+ days and still accruing		60-89 days past due		30-59 days past due		Current		Total Loans
As of September 30, 2018
(Dollars in thousands)
Loan Balances:
Commercial
Commercial, industrial and other	$	41,322	$	—	$	2,535	$	16,451	$	4,745,178	$	4,805,486
Franchise	16,351		5,122		—		—		915,817		937,290
Mortgage warehouse lines of credit	—		—		3,000		—		168,860		171,860
Asset-based lending	910		—		590		9,083		1,023,268		1,033,851
Leases	4		—		—		80		509,591		509,675
PCI - commercial (1)	—		3,372		15		—		12,409		15,796
Total commercial	58,587		8,494		6,140		25,614		7,375,123		7,473,958
Commercial real estate
Construction	1,554		—		1,823		16,228		778,725		798,330
Land	228		—		365		—		118,411		119,004
Office	1,532		—		4,058		3,021		932,166		940,777
Industrial	178		—		122		145		885,486		885,931
Retail	10,586		—		4,570		10,645		861,901		887,702
Multi-family	318		—		—		1,162		922,413		923,893
Mixed use and other	3,119		—		9,654		11,503		2,062,179		2,086,455
PCI - commercial real estate (1)	—		5,578		6,448		1,380		91,276		104,682
Total commercial real estate	17,515		5,578		27,040		44,084		6,652,557		6,746,774
Home equity	8,523		—		1,075		3,478		565,768		578,844
Residential real estate, including PCI	16,062		1,865		1,714		603		904,006		924,250
Premium finance receivables
Commercial insurance loans	13,802		7,028		5,945		13,239		2,845,313		2,885,327
Life insurance loans	—		—		—		22,016		4,203,465		4,225,481
PCI - life insurance loans (1)	—		—		—		—		173,490		173,490
Consumer and other, including PCI	355		295		430		329		114,418		115,827
Total loans, net of unearned income	$	114,844	$	23,260	$	42,344	$	109,363	$	22,834,140	$	23,123,951

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Aging as a % of Loan Balance: As of September 30, 2018	Nonaccrual		90+ days and still accruing		60-89 days past due		30-59 days past due		Current		Total Loans
Commercial
Commercial, industrial and other	0.9	%	—	%	0.1	%	0.3	%	98.7	%	100.0	%
Franchise	1.7		0.5		—		—		97.8		100.0
Mortgage warehouse lines of credit	—		—		1.7		—		98.3		100.0
Asset-based lending	0.1		—		0.1		0.9		98.9		100.0
Leases	—		—		—		—		100.0		100.0
PCI - commercial (1)	—		21.3		0.1		—		78.6		100.0
Total commercial	0.8		0.1		0.1		0.3		98.7		100.0
Commercial real estate
Construction	0.2		—		0.2		2.0		97.6		100.0
Land	0.2		—		0.3		—		99.5		100.0
Office	0.2		—		0.4		0.3		99.1		100.0
Industrial	—		—		—		—		100.0		100.0
Retail	1.2		—		0.5		1.2		97.1		100.0
Multi-family	—		—		—		0.1		99.9		100.0
Mixed use and other	0.1		—		0.5		0.6		98.8		100.0
PCI - commercial real estate (1)	—		5.3		6.2		1.3		87.2		100.0
Total commercial real estate	0.3		0.1		0.4		0.7		98.5		100.0
Home equity	1.5		—		0.2		0.6		97.7		100.0
Residential real estate, including PCI	1.7		0.2		0.2		0.1		97.8		100.0
Premium finance receivables
Commercial insurance loans	0.5		0.2		0.2		0.5		98.6		100.0
Life insurance loans	—		—		—		0.5		99.5		100.0
PCI - life insurance loans (1)	—		—		—		—		100.0		100.0
Consumer and other, including PCI	0.3		0.3		0.4		0.3		98.7		100.0
Total loans, net of unearned income	0.5	%	0.1	%	0.2	%	0.5	%	98.7	%	100.0	%

	Nonaccrual		90+ days and still accruing		60-89 days past due		30-59 days past due		Current		Total Loans
As of June 30, 2018
(Dollars in thousands)
Loan Balances:
Commercial
Commercial, industrial and other	$	13,543	$	—	1,384		9,196		4,597,666		4,621,789
Franchise	2,438		—		408		—		954,493		957,339
Mortgage warehouse lines of credit	—		—		—		—		200,060		200,060
Asset-based lending	2,158		—		1,146		6,411		1,033,040		1,042,755
Leases	249		—		—		89		458,276		458,614
PCI - commercial (1)	—		882		126		227		7,268		8,503
Total commercial	18,388		882		3,064		15,923		7,250,803		7,289,060
Commercial real estate
Construction	1,554		—		—		1,098		804,583		807,235
Land	228		—		—		478		114,651		115,357
Office	1,333		—		207		1,403		891,406		894,349
Industrial	185		—		—		1,126		881,214		882,525
Retail	11,540		—		372		5,473		850,254		867,639
Multi-family	342		—		—		611		951,095		952,048
Mixed use and other	4,013		—		408		9,856		1,934,965		1,949,242
PCI - commercial real estate (1)	—		3,194		3,132		7,637		92,726		106,689
Total commercial real estate	19,195		3,194		4,119		27,682		6,520,894		6,575,084
Home equity	9,096		—		—		3,226		581,178		593,500
Residential real estate, including PCI	15,825		1,472		3,637		1,534		873,002		895,470
Premium finance receivables
Commercial insurance loans	14,832		5,159		8,848		10,535		2,794,078		2,833,452
Life insurance loans	—		—		26,770		17,211		4,074,685		4,118,666
PCI - life insurance loans (1)	—		—		—		—		183,622		183,622
Consumer and other, including PCI	563		286		150		310		120,397		121,706
Total loans, net of unearned income	$	77,899	$	10,993	$	46,588	$	76,421	$	22,398,659	$	22,610,560

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Aging as a % of Loan Balance: As of June 30, 2018	Nonaccrual		90+ days and still accruing		60-89 days past due		30-59 days past due		Current		Total Loans
Commercial
Commercial, industrial and other	0.3	%	—	%	—	%	0.2	%	99.5	%	100.0	%
Franchise	0.3		—		—		—		99.7		100.0
Mortgage warehouse lines of credit	—		—		—		—		100.0		100.0
Asset-based lending	0.2		—		0.1		0.6		99.1		100.0
Leases	0.1		—		—		—		99.9		100.0
PCI - commercial (1)	—		10.4		1.5		2.7		85.4		100.0
Total commercial	0.3		—		—		0.2		99.5		100.0
Commercial real estate
Construction	0.2		—		—		0.1		99.7		100.0
Land	0.2		—		—		0.4		99.4		100.0
Office	0.1		—		—		0.2		99.7		100.0
Industrial	—		—		—		0.1		99.9		100.0
Retail	1.3		—		—		0.6		98.1		100.0
Multi-family	—		—		—		0.1		99.9		100.0
Mixed use and other	0.2		—		—		0.5		99.3		100.0
PCI - commercial real estate (1)	—		3.0		2.9		7.2		86.9		100.0
Total commercial real estate	0.3		—		0.1		0.4		99.2		100.0
Home equity	1.5		—		—		0.5		98.0		100.0
Residential real estate, including PCI	1.8		0.2		0.4		0.2		97.4		100.0
Premium finance receivables
Commercial insurance loans	0.5		0.2		0.3		0.4		98.6		100.0
Life insurance loans	—		—		0.6		0.4		99.0		100.0
PCI - life insurance loans (1)	—		—		—		—		100.0		100.0
Consumer and other, including PCI	0.5		0.2		0.1		0.3		98.9		100.0
Total loans, net of unearned income	0.3	%	—	%	0.2	%	0.3	%	99.2	%	100.0	%

(1) PCI loans represent loans acquired with evidence of credit quality deterioration since origination, in accordance with ASC 310-30. Loan agings are based upon contractually required payments.

As of September 30, 2018, $42.3 million of all loans or 0.2%, were 60 to 89 days past due and $109.4 million of all loans or 0.5%, were 30 to 59 days (or one payment) past due. As of June 30, 2018, $46.6 million of all loans or 0.2%, were 60 to 89 days past due and $76.4 million, or 0.3%, were 30 to 59 days (or one payment) past due. Many of the commercial and commercial real estate loans shown as 60 to 89 days and 30 to 59 days past due are included on the Company’s internal problem loan reporting system. Loans on this system are closely monitored by management on a monthly basis.

The Company's home equity and residential loan portfolios continue to exhibit low delinquency ratios. Home equity loans at September 30, 2018 that were current with regard to the contractual terms of the loan agreement represent 97.7% of the total home equity portfolio. Residential real estate loans at September 30, 2018 that were current with regards to the contractual terms of the loan agreements comprise 97.8% of total residential real estate loans outstanding.

Non-performing Loans Rollforward

The table below presents a summary of non-performing loans, excluding covered loans and PCI loans, for the periods presented:

	Three Months Ended						Nine Months Ended
	September 30,			September 30,			September 30,			September 30,
(Dollars in thousands)	2018			2017			2018			2017
Balance at beginning of period	$	83,282		$	69,050		$	90,162		$	87,454
Additions, net	56,864			10,622			73,875			30,119
Return to performing status	(3,782		)	(603		)	(8,294		)	(3,170		)
Payments received	(6,212		)	(6,633		)	(13,370		)	(22,931		)
Transfer to OREO and other repossessed assets	(659		)	(1,072		)	(6,168		)	(5,276		)
Charge-offs	(3,108		)	(2,295		)	(8,631		)	(7,919		)
Net change for niche loans (1)	842			8,914			(347		)	(294		)
Balance at end of period	$	127,227		$	77,983		$	127,227		$	77,983

(1) This includes activity for premium finance receivables and indirect consumer loans.

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PCI loans are excluded from non-performing loans as they continue to earn interest income from the related accretable yield, independent of performance with contractual terms of the loan. See Note 7 of the Consolidated Financial Statements in Item 1 for further discussion of non-performing loans and the loan aging during the respective periods.

Allowance for Loan Losses

The allowance for loan losses represents management’s estimate of the probable and reasonably estimable loan losses that are inherent in the loan portfolio. The allowance for loan losses is determined quarterly using a methodology that incorporates important risk characteristics of each loan, as described below under “How We Determine the Allowance for Credit Losses” in this Item 2. This process is subject to review at each of our bank subsidiaries by the applicable regulatory authority, including the FRB of Chicago, the OCC, the State of Illinois and the State of Wisconsin.

Management determined that the allowance for loan losses was appropriate at September 30, 2018, and that the loan portfolio is well diversified and well secured, without undue concentration in any specific risk area. While this process involves a high degree of management judgment, the allowance for credit losses is based on a comprehensive, well documented, and consistently applied analysis of the Company’s loan portfolio. This analysis takes into consideration all available information existing as of the financial statement date, including environmental factors such as economic, industry, geographical and political factors. The relative level of allowance for credit losses is reviewed and compared to industry peers. This review encompasses levels of total non-performing loans, portfolio mix, portfolio concentrations, current geographic risks and overall levels of net charge-offs. Historical trending of both the Company’s results and the industry peers is also reviewed to analyze comparative significance.

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Allowance for Credit Losses, excluding covered loans

The following table summarizes the activity in our allowance for credit losses during the periods indicated.

	Three Months Ended						Nine Months Ended
(Dollars in thousands)	September 30, 2018			September 30, 2017			September 30, 2018			September 30, 2017
Allowance for loan losses at beginning of period	$	143,402		$	129,591		$	137,905		$	122,291
Provision for credit losses	11,042			7,942			24,431			22,210
Other adjustments	(18		)	(39		)	(102		)	(125		)
Reclassification to allowance for unfunded lending-related commitments	(2		)	94			24			62
Charge-offs:
Commercial	3,219			2,265			8,116			3,819
Commercial real estate	208			989			1,176			3,235
Home equity	561			968			1,530			3,224
Residential real estate	337			267			1,088			742
Premium finance receivables—commercial	2,512			1,716			10,487			5,021
Premium finance receivables—life insurance	—			—			—			—
Consumer and other	144			213			732			522
Total charge-offs	6,981			6,418			23,129			16,563
Recoveries:
Commercial	304			801			1,232			1,635
Commercial real estate	193			323			4,267			1,153
Home equity	142			178			436			387
Residential real estate	466			55			2,028			287
Premium finance receivables—commercial	1,142			499			2,502			1,515
Premium finance receivables—life insurance	—			—			—			—
Consumer and other	66			93			162			267
Total recoveries	2,313			1,949			10,627			5,244
Net charge-offs	(4,668		)	(4,469		)	(12,502		)	(11,319		)
Allowance for loan losses at period end	$	149,756		$	133,119		$	149,756		$	133,119
Allowance for unfunded lending-related commitments at period end	1,245			1,276			1,245			1,276
Allowance for credit losses at period end	$	151,001		$	134,395		$	151,001		$	134,395
Annualized net charge-offs by category as a percentage of its own respective category’s average:
Commercial	0.16		%	0.09		%	0.13		%	0.05		%
Commercial real estate	0.00			0.04			(0.06		)	0.04
Home equity	0.28			0.46			0.24			0.54
Residential real estate	(0.06		)	0.11			(0.15		)	0.08
Premium finance receivables—commercial	0.19			0.18			0.39			0.18
Premium finance receivables—life insurance	0.00			0.00			0.00			0.00
Consumer and other	0.23			0.37			0.58			0.27
Total loans, net of unearned income, excluding covered loans	0.08		%	0.08		%	0.08		%	0.07		%
Net charge-offs as a percentage of the provision for credit losses	42.27		%	56.27		%	51.17		%	50.96		%
Loans at period-end, excluding covered loans	$	23,123,951		$	20,912,781
Allowance for loan losses as a percentage of loans at period end	0.65		%	0.64		%
Allowance for credit losses as a percentage of loans at period end	0.65		%	0.64		%

The allowance for credit losses, excluding the allowance for covered loan losses, is comprised of an allowance for loan losses, which is determined with respect to loans that we have originated, and an allowance for lending-related commitments. Our allowance for lending-related commitments is determined with respect to funds that we have committed to lend but for which funds have not yet been disbursed and is computed using a methodology similar to that used to determine the allowance for loan losses. The allowance for unfunded lending-related commitments totaled $1.2 million and $1.3 million as of September 30, 2018 and September 30, 2017, respectively.

90

Additions to the allowance for loan losses are charged to earnings through the provision for credit losses. Charge-offs represent the amount of loans that have been determined to be uncollectible during a given period, and are deducted from the allowance for loan losses, and recoveries represent the amount of collections received from loans that had previously been charged off, and are credited to the allowance for loan losses. See Note 7 of the Consolidated Financial Statements presented under Item 1 of this report for further discussion of activity within the allowance for loan losses during the period and the relationship with respective loan balances for each loan category and the total loan portfolio, excluding covered loans.

How We Determine the Allowance for Credit Losses

The allowance for loan losses includes an element for estimated probable but undetected losses and for imprecision in the credit risk models used to calculate the allowance. If the loan is impaired, the Company analyzes the loan for purposes of calculating our specific impairment reserves as part of the Problem Loan Reporting system review. A general reserve is separately determined for loans not considered impaired. See Note 7 of the Consolidated Financial Statements presented under Item 1 of this report for further discussion of the specific impairment reserve and general reserve as it relates to the allowance for credit losses for each loan category and the total loan portfolio, excluding covered loans.

Specific Impairment Reserves:

Loans with a credit risk rating of a 6 through 9 are reviewed on a monthly basis to determine if (a) an amount is deemed uncollectible (a charge-off) or (b) it is probable that the Company will be unable to collect amounts due in accordance with the original contractual terms of the loan (impaired loan). If a loan is impaired, the carrying amount of the loan is compared to the expected payments to be received, discounted at the loan’s original rate, or for collateral dependent loans, to the fair value of the collateral less the estimated cost to sell. Any shortfall is recorded as a specific impairment reserve.

At September 30, 2018, the Company had $132.5 million of impaired loans with $83.3 million of this balance requiring $14.4 million of specific impairment reserves. At June 30, 2018, the Company had $120.3 million of impaired loans with $40.0 million of this balance requiring $8.5 million of specific impairment reserves. The most significant fluctuations in the recorded investment of impaired loans with specific impairment from June 30, 2018 to September 30, 2018 occurred within the commercial, industrial and other and commercial franchise portfolios. The recorded investment and specific impairment reserves in commercial, industrial and other portfolio increased by $27.6 million and $5.3 million, respectively, which was primarily the result of certain loans becoming nonperforming and requiring $5.9 million of specific impairment reserve during the third quarter of 2018. The recorded investment and specific impairment reserves in commercial franchise portfolio increased by $13.9 million and $430,000, respectively, which was primarily the result of one relationship becoming non-performing and requiring $1.6 million of specific impairment reserve. See Note 7 of the Consolidated Financial Statements presented under Item 1 of this report for further discussion of impaired loans and the related specific impairment reserve.

General Reserves:

For loans with a credit risk rating of 1 through 7 that are not considered impaired loans, reserves are established based on the type of loan collateral, if any, and the assigned credit risk rating. Determination of the allowance is inherently subjective as it requires significant estimates, including the amounts and timing of expected future cash flows on impaired loans, estimated losses on pools of homogeneous loans based on the average historical loss experience over a six-year period, and consideration of current environmental factors and economic trends, all of which may be susceptible to significant change.

We determine this component of the allowance for loan losses by classifying each loan into (i) categories based on the type of collateral that secures the loan (if any), and (ii) one of ten categories based on the credit risk rating of the loan, as described above under “Past Due Loans and Non-Performing Assets” in this Item 2. Each combination of collateral and credit risk rating is then assigned a specific loss factor that incorporates the following factors:

• historical loss experience;

• changes in lending policies and procedures, including changes in underwriting standards and collection, charge-off, and recovery practices not considered elsewhere in estimating credit losses;

• changes in national, regional, and local economic and business conditions and developments that affect the collectibility of the portfolio;

• changes in the nature and volume of the portfolio and in the terms of the loans;

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• changes in the experience, ability, and depth of lending management and other relevant staff;

• changes in the volume and severity of past due loans, the volume of non-accrual loans, and the volume and severity of adversely classified or graded loans;

• changes in the quality of the bank’s loan review system;

• changes in the underlying collateral for collateral dependent loans;

• the existence and effect of any concentrations of credit, and changes in the level of such concentrations; and

• the effect of other external factors such as competition and legal and regulatory requirements on the level of estimated credit losses in the bank’s existing portfolio.

In 2018, the Company modified its historical loss experience analysis by incorporating eight-year average loss rate assumptions for its historical loss experience to capture an extended credit cycle. The current eight-year average loss rate assumption analysis is computed for each of the Company’s collateral codes. The historical loss experience is combined with the specific loss factor for each combination of collateral and credit risk rating which is then applied to each individual loan balance to determine an appropriate general reserve. The historical loss rates are updated on a quarterly basis and are driven by the performance of the portfolio and any changes to the specific loss factors are driven by management judgment and analysis of the factors described above. The Company also analyzes the three-, four-, five- and six-year average historical loss rates on a quarterly basis as a comparison.

Home Equity and Residential Real Estate Loans:

The determination of the appropriate allowance for loan losses for residential real estate and home equity loans differs slightly from the process used for commercial and commercial real estate loans. The same credit risk rating system, Problem Loan Reporting system, collateral coding methodology and loss factor assignment are used. The only significant difference is in how the credit risk ratings are assigned to these loans.

The home equity loan portfolio is reviewed on a loan by loan basis by analyzing current FICO scores of the borrowers, line availability, recent line usage, an approaching maturity and the aging status of the loan. Certain of these factors, or combination of these factors, may cause a portion of the credit risk ratings of home equity loans across all banks to be downgraded. Similar to commercial and commercial real estate loans, once a home equity loan’s credit risk rating is downgraded to a 6 through 9, the Company’s Managed Asset Division reviews and advises the subsidiary banks as to collateral valuations and as to the ultimate resolution of the credits that deteriorate to a non-accrual status to minimize losses.

Residential real estate loans that are downgraded to a credit risk rating of 6 through 9 also enter the problem loan reporting system and have the underlying collateral evaluated by the Managed Assets Division.

Premium Finance Receivables:

The determination of the appropriate allowance for loan losses for premium finance receivables is based on the assigned credit risk rating of loans in the portfolio. Loss factors are assigned to each risk rating in order to calculate an allowance for credit losses. The allowance for loan losses for these categories is entirely a general reserve.

Methodology in Assessing Impairment and Charge-off Amounts

In determining the amount of impairment or charge-offs associated with collateral dependent loans, the Company values the loan generally by starting with a valuation obtained from an appraisal of the underlying collateral and then deducting estimated selling costs to arrive at a net appraised value. We obtain the appraisals of the underlying collateral typically on an annual basis from one of a pre-approved list of independent, third party appraisal firms. Types of appraisal valuations include “as-is,” “as-complete,” “as-stabilized,” bulk, fair market, liquidation and “retail sellout” values.

In many cases, the Company simultaneously values the underlying collateral by marketing the property to market participants interested in purchasing properties of the same type. If the Company receives offers or indications of interest, we will analyze the price and review market conditions to assess whether in light of such information the appraised value overstates the likely price and that a lower price would be a better assessment of the market value of the property and would enable us to liquidate the collateral. Additionally, the Company takes into account the strength of any guarantees and the ability of the borrower to provide

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value related to those guarantees in determining the ultimate charge-off or reserve associated with any impaired loans. Accordingly, the Company may charge-off a loan to a value below the net appraised value if it believes that an expeditious liquidation is desirable in the circumstance and it has legitimate offers or other indications of interest to support a value that is less than the net appraised value. Alternatively, the Company may carry a loan at a value that is in excess of the appraised value if the Company has a guarantee from a borrower that the Company believes has realizable value. In evaluating the strength of any guarantee, the Company evaluates the financial wherewithal of the guarantor, the guarantor’s reputation, and the guarantor’s willingness and desire to work with the Company. The Company then conducts a review of the strength of a guarantee on a frequency established as the circumstances and conditions of the borrower warrant.

In circumstances where the Company has received an appraisal but has no third party offers or indications of interest, the Company may enlist the input of realtors in the local market as to the highest valuation that the realtor believes would result in a liquidation of the property given a reasonable marketing period of approximately 90 days. To the extent that the realtors’ indication of market clearing price under such scenario is less than the net appraised valuation, the Company may take a charge-off on the loan to a valuation that is less than the net appraised valuation.

The Company may also charge-off a loan below the net appraised valuation if the Company holds a junior mortgage position in a piece of collateral whereby the risk to acquiring control of the property through the purchase of the senior mortgage position is deemed to potentially increase the risk of loss upon liquidation due to the amount of time to ultimately market the property and the volatile market conditions. In such cases, the Company may abandon its junior mortgage and charge-off the loan balance in full.

In other cases, the Company may allow the borrower to conduct a “short sale,” which is a sale where the Company allows the borrower to sell the property at a value less than the amount of the loan. Many times, it is possible for the current owner to receive a better price than if the property is marketed by a financial institution which the market place perceives to have a greater desire to liquidate the property at a lower price. To the extent that we allow a short sale at a price below the value indicated by an appraisal, we may take a charge-off beyond the value that an appraisal would have indicated.

Other market conditions may require a reserve to bring the carrying value of the loan below the net appraised valuation such as litigation surrounding the borrower and/or property securing our loan or other market conditions impacting the value of the collateral.

Having determined the net value based on the factors such as those noted above and compared that value to the book value of the loan, the Company arrives at a charge-off amount or a specific reserve included in the allowance for loan losses. In summary, for collateral dependent loans, appraisals are used as the fair value starting point in the estimate of net value. Estimated costs to sell are deducted from the appraised value to arrive at the net appraised value. Although an external appraisal is the primary source of valuation utilized for charge-offs on collateral dependent loans, alternative sources of valuation may become available between appraisal dates. As a result, we may utilize values obtained through these alternating sources, which include purchase and sale agreements, legitimate indications of interest, negotiated short sales, realtor price opinions, sale of the note or support from guarantors, as the basis for charge-offs. These alternative sources of value are used only if deemed to be more representative of value based on updated information regarding collateral resolution. In addition, if an appraisal is not deemed current, a discount to appraised value may be utilized. Any adjustments from appraised value to net value are detailed and justified in an impairment analysis, which is reviewed and approved by the Company’s Managed Assets Division.

TDRs

At September 30, 2018, the Company had $66.2 million in loans modified in TDRs. The $66.2 million in TDRs represents 111 credits in which economic concessions were granted to certain borrowers to better align the terms of their loans with their current ability to pay. The balance increased from $65.3 million representing 94 credits at June 30, 2018 and increased from $33.2 million representing 78 credits at September 30, 2017.

Concessions were granted on a case-by-case basis working with these borrowers to find modified terms that would assist them in retaining their businesses or their homes and attempt to keep these loans in an accruing status for the Company. Typical concessions include reduction of the interest rate on the loan to a rate considered lower than market and other modification of terms including forgiveness of a portion of the loan balance, extension of the maturity date, and/or modifications from principal and interest payments to interest-only payments for a certain period. See Note 7 of the Consolidated Financial Statements in Item 1 of this report for further discussion regarding the effectiveness of these modifications in keeping the modified loans current based upon contractual terms.

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Subsequent to its restructuring, any TDR that becomes nonaccrual or more than 90 days past-due and still accruing interest will be included in the Company’s non-performing loans. Each TDR was reviewed for impairment at September 30, 2018 and approximately $3.9 million of impairment was present and appropriately reserved for through the Company’s normal reserving methodology in the Company’s allowance for loan losses. Additionally, at September 30, 2018, the Company was committed to lend an additional $720,000 of funds to borrowers under the contractual terms of TDRs.

The table below presents a summary of restructured loans for the respective periods, presented by loan category and accrual status:

	September 30,			June 30,			September 30,
(Dollars in thousands)	2018			2018			2017
Accruing TDRs:
Commercial	$	8,794		$	37,560		$	3,774
Commercial real estate	14,160			15,086			16,475
Residential real estate and other	8,533			4,603			6,723
Total accruing TDRs	$	31,487		$	57,249		$	26,972
Non-accrual TDRs: (1)
Commercial	$	30,452		$	1,671		$	2,493
Commercial real estate	1,326			1,362			1,492
Residential real estate and other	2,954			5,028			2,226
Total non-accrual TDRs	$	34,732		$	8,061		$	6,211
Total TDRs:
Commercial	$	39,246		$	39,231		$	6,267
Commercial real estate	15,486			16,448			17,967
Residential real estate and other	11,487			9,631			8,949
Total TDRs	$	66,219		$	65,310		$	33,183
Weighted-average contractual interest rate of TDRs	5.48		%	5.46		%	4.39		%

(1) Included in total non-performing loans.

TDR Rollforward

The tables below present a summary of TDRs as of September 30, 2018 and September 30, 2017, and shows the changes in the balance during those periods:

Three Months Ended September 30, 2018 (Dollars in thousands)	Commercial			Commercial Real Estate			Residential Real Estate and Other			Total
Balance at beginning of period	$	39,231		$	16,448		$	9,631		$	65,310
Additions during the period	554			—			3,679			4,233
Reductions:
Charge-offs	—			—			(83		)	(83		)
Transferred to OREO and other repossessed assets	—			—			—			—
Removal of TDR loan status	(395		)	(461		)	—			(856		)
Payments received	(144		)	(501		)	(1,740		)	(2,385		)
Balance at period end	$	39,246		$	15,486		$	11,487		$	66,219

(1) Loan was previously classified as a TDR and subsequently performed in compliance with the loan's modifiedterms for a period of six months (including over a calendar year-end) at a modified interest rate which represented a market rate at the time of restructuring. Per our TDR policy, the TDR classification is removed.

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Three Months Ended September 30, 2017 (Dollars in thousands)	Commercial			Commercial Real Estate			Residential Real Estate and Other			Total
Balance at beginning of period	$	4,996		$	19,188		$	8,907		$	33,091
Additions during the period	1,407			—			256			1,663
Reductions:
Charge-offs	—			—			(31		)	(31		)
Transferred to OREO and other repossessed assets	—			(160		)	(69		)	(229		)
Removal of TDR loan status (1)	—			—			—			—
Payments received	(136		)	(1,061		)	(114		)	(1,311		)
Balance at period end	$	6,267		$	17,967		$	8,949		$	33,183

Nine Months Ended September 30, 2018 (Dollars in thousands)	Commercial			Commercial Real Estate			Residential Real Estate and Other			Total
Balance at beginning of period	$	23,917		$	17,500		$	8,369		$	49,786
Additions during the period	18,838			144			5,846			24,828
Reductions:
Charge-offs	(2,208		)	—			(453		)	(2,661		)
Transferred to OREO and other repossessed assets	—			—			—			—
Removal of TDR loan status (1)	(395		)	(631		)	—			(1,026		)
Payments received	(906		)	(1,527		)	(2,275		)	(4,708		)
Balance at period end	$	39,246		$	15,486		$	11,487		$	66,219

Nine Months Ended September 30, 2017 (Dollars in thousands)	Commercial			Commercial Real Estate			Residential Real Estate and Other			Total
Balance at beginning of period	$	6,130		$	28,146		$	7,432		$	41,708
Additions during the period	1,502			1,245			2,639			5,386
Reductions:
Charge-offs	(315		)	(925		)	(108		)	(1,348		)
Transferred to OREO and other repossessed assets	—			(770		)	(165		)	(935		)
Removal of TDR loan status (1)	(610		)	(2,331		)	—			(2,941		)
Payments received	(440		)	(7,398		)	(849		)	(8,687		)
Balance at period end	$	6,267		$	17,967		$	8,949		$	33,183

(1) Loan was previously classified as a TDR and subsequently performed in compliance with the loan's modifiedterms for a period of six months (including over a calendar year-end) at a modified interest rate which represented a market rate at the time of restructuring. Per our TDR policy, the TDR classification is removed.

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Other Real Estate Owned ("OREO")

In certain circumstances, the Company is required to take action against the real estate collateral of specific loans. The Company uses foreclosure only as a last resort for dealing with borrowers experiencing financial hardships. The Company employs extensive contact and restructuring procedures to attempt to find other solutions for our borrowers. The tables below present a summary of other real estate owned, excluding covered other real estate owned, and shows the activity for the respective periods and the balance for each property type:

	Three Months Ended						Nine Months Ended
(Dollars in thousands)	September 30, 2018			September 30, 2017			September 30, 2018			September 30, 2017
Balance at beginning of period	$	35,331		$	39,361		$	40,646		$	40,282
Disposal/resolved	(7,291		)	(2,391		)	(15,527		)	(9,305		)
Transfers in at fair value, less costs to sell	349			898			6,939			7,131
Transfers in from covered OREO subsequent to loss share expiration	—			—			—			760
Additions from acquisition	1,418			—			1,418			—
Fair value adjustments	(1,504		)	(490		)	(5,173		)	(1,490		)
Balance at end of period	$	28,303		$	37,378		$	28,303		$	37,378

	Period End
(Dollars in thousands)	September 30, 2018		June 30, 2018		September 30, 2017
Residential real estate	$	3,735	$	5,155	$	7,236
Residential real estate development	1,952		2,205		676
Commercial real estate	22,616		27,971		29,466
Total	$	28,303	$	35,331	$	37,378

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Deposits

Total deposits at September 30, 2018 were $24.9 billion,an increase of $2.0 billion, or 9%, compared to total deposits at September 30, 2017. See Note 10 to the Consolidated Financial Statements in Item 1 of this report for a summary of period end deposit balances.

The following table sets forth, by category, the maturity of time certificates of deposit as of September 30, 2018:

Time Certificates of Deposit Maturity/Re-pricing Analysis As of September 30, 2018 (Dollars in thousands)	CDARs & Brokered Certificates of Deposit (1)		MaxSafe Certificates of Deposit (1)		Variable Rate Certificates of Deposit (2)		Other Fixed Rate Certificates of Deposit (1)		Total Time Certificates of Deposits		Weighted-Average Rate of Maturing Time Certificates of Deposit (3)
1-3 months	$	75,033	$	38,489	$	107,833	$	880,119	$	1,101,474	1.39	%
4-6 months	59		27,323		—		831,304		858,686		1.45	%
7-9 months	249		22,001		—		817,515		839,765		1.63	%
10-12 months	75,019		22,576		—		641,856		739,451		1.71	%
13-18 months	—		19,863		—		670,023		689,886		1.78	%
19-24 months	—		4,859		—		582,323		587,182		2.35	%
24+ months	1,000		19,346		—		623,248		643,594		2.46	%
Total	$	151,360	$	154,457	$	107,833	$	5,046,388	$	5,460,038	1.76	%

(1) This category of certificates of deposit is shown by contractual maturity date.

(2) This category includes variable rate certificates of deposit and savings certificates with the majority repricing on at least a monthly basis.

(3) Weighted-average rate excludes the impact of purchase accounting fair value adjustments.

The following table sets forth, by category, the composition of average deposit balances and the relative percentage of total average deposits for the periods presented:

	Three Months Ended
	September 30, 2018				June 30, 2018				September 30, 2017
(Dollars in thousands)	Balance		Percent		Balance		Percent		Balance		Percent
Non-interest bearing	$	6,461,195	26	%	$	6,539,731	27	%	$	6,419,326	29	%
NOW and interest bearing demand deposits	2,519,445		10		2,295,268		10		2,344,848		10
Wealth management deposits	2,517,141		10		2,365,191		10		2,320,674		10
Money market	5,369,324		22		4,883,645		21		4,471,342		20
Savings	2,672,077		11		2,702,665		12		2,581,946		11
Time certificates of deposit	5,214,637		21		4,557,187		20		4,573,081		20
Total average deposits	$	24,753,819	100	%	$	23,343,687	100	%	$	22,711,217	100	%

Total average deposits for the third quarter of 2018 were $24.8 billion, an increase of $2.0 billion, or 9.0%, from the third quarter of 2017. The increase in average deposits is primarily attributable to the CSC acquisition and branch openings along with additional deposits associated with relationships from marketing efforts during 2018.

Wealth management deposits are funds from the brokerage customers of Wintrust Investments, the trust and asset management customers of the Company and brokerage customers from unaffiliated companies which have been placed into deposit accounts of the banks (“wealth management deposits” in the table above). Wealth Management deposits consist primarily of money market accounts. Consistent with reasonable interest rate risk parameters, these funds have generally been invested in loan production of the banks as well as other investments suitable for banks.

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Brokered Deposits

While the Company obtains a portion of its total deposits through brokered deposits, the Company does so primarily as an asset-liability management tool to assist in the management of interest rate risk, and the Company does not consider brokered deposits to be a vital component of its current liquidity resources. Historically, brokered deposits have represented a small component of the Company’s total deposits outstanding, as set forth in the table below:

	September 30,						December 31,
(Dollars in thousands)	2018			2017			2017			2016			2015
Total deposits	$	24,916,715		$	22,895,063		$	23,183,347		$	21,658,632		$	18,639,634
Brokered deposits	1,842,895			1,280,492			1,445,306			1,159,475			862,026
Brokered deposits as a percentage of total deposits	7.4		%	5.6		%	6.2		%	5.4		%	4.6		%

Brokered deposits include certificates of deposit obtained through deposit brokers, deposits received through the Certificate of Deposit Account Registry Program (“CDARS”), and wealth management deposits of brokerage customers from unaffiliated companies which have been placed into deposit accounts of the banks.

Other Funding Sources

Although deposits are the Company’s primary source of funding its interest-earning assets, the Company’s ability to manage the types and terms of deposits is somewhat limited by customer preferences and market competition. As a result, in addition to deposits and the issuance of equity securities and the retention of earnings, the Company uses several other funding sources to support its growth. These sources include short-term borrowings, notes payable, FHLB advances, subordinated debt, secured borrowings and junior subordinated debentures. The Company evaluates the terms and unique characteristics of each source, as well as its asset-liability management position, in determining the use of such funding sources.

The following table sets forth, by category, the composition of the average balances of other funding sources for the quarterly periods presented:

	Three Months Ended
	September 30,		June 30,		September 30,
(Dollars in thousands)	2018		2018		2017
FHLB advances	$	429,739	$	1,006,407	$	324,996
Other borrowings:
Notes payable	46,913		33,645		44,878
Short-term borrowings	16,814		14,985		34,674
Secured borrowings	156,399		142,948		139,549
Other	48,152		48,488		49,749
Total other borrowings	$	268,278	$	240,066	$	268,850
Subordinated notes	139,155		139,125		139,035
Junior subordinated debentures	253,566		253,566		253,566
Total other funding sources	$	1,090,738	$	1,639,164	$	986,447

FHLB advances provide the banks with access to fixed rate funds which are useful in mitigating interest rate risk and achieving an acceptable interest rate spread on fixed rate loans or securities. Additionally, the banks have the ability to borrow shorter-term, overnight funding from the FHLB for other general purposes. FHLB advances to the banks totaled $615.0 million at September 30, 2018, compared to $667.0 million at June 30, 2018 and $469.0 million at September 30, 2017.

Notes payable balances as of September 30, 2018 represent the balances on a $200.0 million loan agreement with unaffiliated banks consisting of a $50.0 million revolving credit facility and a $150.0 million term facility. Both loan facilities are available for corporate purposes such as to provide capital to fund continued growth at existing bank subsidiaries, possible future acquisitions and for other general corporate matters. At September 30, 2018, the Company had a balance under the term facility of $149.8 million. The Company was contractually required to borrow the entire amount of the term facility on September 18, 2018 and all such borrowings must be repaid by September 18, 2023. At September 30, 2018 the Company had no outstanding balance on the $50.0 million revolving credit facility.

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In connection with the establishment of the $200.0 million loan agreement, all outstanding notes payable balances under a $150.0 million loan agreement with unaffiliated banks consisting of a $75.0 million revolving credit facility and a $75.0 million term facility were paid in full. This $150.0 million loan agreement was also available for corporate purposes such as to provide capital to fund continued growth at existing bank subsidiaries, possible future acquisitions and for other general corporate matters. At June 30, 2018 and September 30, 2017, the Company had a balance under the term facility of $30.0 million and $41.2 million, respectively. At June 30, 2018 and September 30, 2017, the Company had no outstanding balance on the $75.0 million revolving credit facility.

Short-term borrowings include securities sold under repurchase agreements and federal funds purchased. These borrowings totaled $17.4 million at September 30, 2018 compared to $21.4 million at June 30, 2018 and $20.0 million at September 30, 2017. Securities sold under repurchase agreements represent sweep accounts for certain customers in connection with master repurchase agreements at the banks. This funding category typically fluctuates based on customer preferences and daily liquidity needs of the banks, their customers and the banks’ operating subsidiaries.

The average balance of secured borrowings primarily represents a third party Canadian transaction ("Canadian Secured Borrowing"). Under the Canadian Secured Borrowing, in December 2014, the Company, through its subsidiary, FIFC Canada, sold an undivided co-ownership interest in all receivables owed to FIFC Canada to an unrelated third party in exchange for a cash payment of approximately C$150 million pursuant to a receivables purchase agreement (“Receivables Purchase Agreement”). The Receivables Purchase Agreement was amended in December 2015, effectively extending the maturity date from December 15, 2015 to December 15, 2017. Additionally, at that time, the unrelated third party paid an additional C$10 million, which increased the total payments to C$160 million. The Receivables Purchase Agreement was again amended in December 2017, effectively extending the maturity date from December 15, 2017 to December 16, 2019. Additionally, in December 2017, the unrelated third party paid an additional C$10 million, which increased the total payments to C$170 million. In June 2018, the unrelated third party paid an additional C$20 million, which increased the total payments to C$190 million. These transactions were not considered sales of receivables and, as such, related proceeds received are reflected on the Company’s Consolidated Statements of Condition as a secured borrowing owed to the unrelated third party and translated to the Company’s reporting currency as of the respective date. The translated balance of the Canadian Secured Borrowing under the Receivables Purchase Agreement totaled $147.2 million at September 30, 2018 compared to $144.6 million at June 30, 2018 and $128.3 million at September 30, 2017. At September 30, 2018, the interest rate of the Canadian Secured Borrowing was 2.7189%. The remaining balance within secured borrowings at March 31, 2018 represents other sold interests in certain loans by the Company that were not considered sales and, as such, related proceeds received are reflected on the Company’s Consolidated Statements of Condition as a secured borrowing owed to the various unrelated third parties.

Other borrowings at September 30, 2018 include a fixed-rate promissory note issued by the Company in June 2017 ("Fixed-Rate Promissory Note") related to and secured by two office buildings owned by the Company, and non-recourse notes issued by the Company to other banks related to certain capital leases. At September 30, 2018, the Fixed-Rate Promissory Note had a balance of $48.0 million compared to $48.4 million at June 30, 2018 and $49.3 million at September 30, 2017. Under the Fixed-Rate Promissory Note, the Company makes monthly principal payments and pay interest at a fixed rate of 3.36% until maturity on June 30, 2022. At September 30, 2018, there were no non-recourse notes related to certain capital leases.

At September 30, 2018, the Company had outstanding subordinated notes totaling $139.2 million compared to $139.1 million and $139.1 million outstanding at June 30, 2018 and September 30, 2017, respectively. The notes have a stated interest rate of 5.00% and mature in June 2024. These notes are stated at par adjusted for unamortized costs paid related to the issuance of this debt.

The Company had $253.6 million of junior subordinated debentures outstanding as of September 30, 2018, June 30, 2018 and September 30, 2017. The amounts reflected on the balance sheet represent the junior subordinated debentures issued to eleven trusts by the Company and equal the amount of the preferred and common securities issued by the trusts. At September 30, 2018, the Company included $245.5 million of the junior subordinated debentures, net of common securities, in Tier 2 regulatory capital.

See Notes 11 and 12 of the Consolidated Financial Statements presented under Item 1 of this report for details of period end balances and other information for these various funding sources.

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Shareholders’ Equity

The following tables reflect various consolidated measures of capital as of the dates presented and the capital guidelines established by the FRB for a bank holding company:

	September 30, 2018		June 30, 2018		September 30, 2017
Leverage ratio	9.3	%	9.4	%	9.2	%
Tier 1 capital to risk-weighted assets	10.0		10.0		10.0
Common equity Tier 1 capital to risk-weighted assets	9.5		9.6		9.5
Total capital to risk-weighted assets	12.0		12.1		12.2
Total average equity-to-total average assets(1)	10.6		10.7		10.7

(1) Based on quarterly average balances.

	Minimum Capital Requirements		Well Capitalized
Leverage ratio	4.0	%	5.0	%
Tier 1 capital to risk-weighted assets	6.0		8.0
Common equity Tier 1 capital to risk-weighted assets	4.5		6.5
Total capital to risk-weighted assets	8.0		10.0

The Company’s principal sources of funds at the holding company level are dividends from its subsidiaries, borrowings under its loan agreement with unaffiliated banks and proceeds from the issuances of subordinated debt and additional equity. Refer to Notes 11, 12 and 18 of the Consolidated Financial Statements in Item 1 for further information on these various funding sources. Management is committed to maintaining the Company’s capital levels above the “Well Capitalized” levels established by the FRB for bank holding companies.

The Company’s Board of Directors approves dividends from time to time, however, the ability to declare a dividend is limited by the Company's financial condition, the terms of the Company's Series D preferred stock, the terms of the Company’s Trust Preferred Securities offerings and under certain financial covenants in the Company’s revolving and term facilities. In January, April and July of 2018, the Company declared a quarterly cash dividend of $0.19 per common share. In January, April, July and October of 2017, the Company declared a quarterly cash dividend of $0.14 per common share.

See Note 18 of the Consolidated Financial Statements presented under Item 1 of this report for details on the Company’s issuance of Series D and Series C preferred stock in June 2015 and March 2012, respectively, as well as details on the mandatory conversion of the Series C preferred stock in April 2017. The Company hereby incorporates by reference Note 18 of the Consolidated Financial Statements presented under Item 1 of this report in its entirety.

Announced Acquisitions

On July 31, 2018, the Company announced that its subsidiary Northbrook Bank & Trust Company signed a definitive agreement to acquire certain assets and assume certain liabilities of American Enterprise Bank (“AEB”) which is headquartered in Buffalo Grove, Illinois. As of June 30, 2018, AEB had approximately $200 million in assets, including approximately $151 million in loans and approximately $157 million in deposits. The assets to be acquired include substantially all of AEB’s loans, investment securities and customer deposits at closing, as well as specified OREO properties.  Excluded assets and liabilities include real property owned by AEB (other than OREO properties).

LIQUIDITY

Wintrust manages the liquidity position of its banking operations to ensure that sufficient funds are available to meet customers’ needs for loans and deposit withdrawals. The liquidity to meet these demands is provided by maturing assets, liquid assets that can be converted to cash and the ability to attract funds from external sources. Liquid assets refer to money market assets such as Federal funds sold and interest bearing deposits with banks, as well as available-for-sale debt securities which are not pledged to secure public funds.

The Company believes that it has sufficient funds and access to funds to meet its working capital and other needs. Please refer to Management's Discussion and Analysis of Financial Condition and Results of Operation - Interest-Earning Assets, -Deposits, -

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Other Funding Sources and -Shareholders’ Equity sections of this report for additional information regarding the Company’s liquidity position.

INFLATION

A banking organization’s assets and liabilities are primarily monetary. Changes in the rate of inflation do not have as great an impact on the financial condition of a bank as do changes in interest rates. Moreover, interest rates do not necessarily change at the same percentage as inflation. Accordingly, changes in inflation are not expected to have a material impact on the Company. An analysis of the Company’s asset and liability structure provides the best indication of how the organization is positioned to respond to changing interest rates. See “Quantitative and Qualitative Disclosures About Market Risk” section of this report for additional information.

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FORWARD-LOOKING STATEMENTS

This document contains forward-looking statements within the meaning of federal securities laws. Forward-looking information can be identified through the use of words such as “intend,” “plan,” “project,” “expect,” “anticipate,” “believe,” “estimate,” “contemplate,” “possible,” “will,” “may,” “should,” “would” and “could.” Forward-looking statements and information are not historical facts, are premised on many factors and assumptions, and represent only management’s expectations, estimates and projections regarding future events. Similarly, these statements are not guarantees of future performance and involve certain risks and uncertainties that are difficult to predict, which may include, but are not limited to, those listed below and the Risk Factors discussed under Item 1A of the Company’s 2017 Annual Report on Form 10-K and in any of the Company’s subsequent SEC filings. The Company intends such forward-looking statements to be covered by the safe harbor provisions for forward-looking statements contained in the Private Securities Litigation Reform Act of 1995, and is including this statement for purposes of invoking these safe harbor provisions. Such forward-looking statements may be deemed to include, among other things, statements relating to the Company’s future financial performance, the performance of its loan portfolio, the expected amount of future credit reserves and charge-offs, delinquency trends, growth plans, regulatory developments, securities that the Company may offer from time to time, and management’s long-term performance goals, as well as statements relating to the anticipated effects on financial condition and results of operations from expected developments or events, the Company’s business and growth strategies, including future acquisitions of banks, specialty finance or wealth management businesses, internal growth and plans to form additional de novo banks or branch offices. Actual results could differ materially from those addressed in the forward-looking statements as a result of numerous factors, including the following:

• economic conditions that affect the economy, housing prices, the job market and other factors that may adversely affect the Company’s liquidity and the performance of its loan portfolios, particularly in the markets in which it operates;

• the extent of defaults and losses on the Company’s loan portfolio, which may require further increases in its allowance for credit losses;

• estimates of fair value of certain of the Company’s assets and liabilities, which could change in value significantly from period to period;

• the financial success and economic viability of the borrowers of our commercial loans;

• commercial real estate market conditions in the Chicago metropolitan area and southern Wisconsin;

• the extent of commercial and consumer delinquencies and declines in real estate values, which may require further increases in the Company’s allowance for loan and lease losses;

• inaccurate assumptions in our analytical and forecasting models used to manage our loan portfolio;

• changes in the level and volatility of interest rates, the capital markets and other market indices that may affect, among other things, the Company’s liquidity and the value of its assets and liabilities;

• competitive pressures in the financial services business which may affect the pricing of the Company’s loan and deposit products as well as its services (including wealth management services), which may result in loss of market share and reduced income from deposits, loans, advisory fees and income from other products;

• failure to identify and complete favorable acquisitions in the future or unexpected difficulties or developments related to the integration of the Company’s recent or future acquisitions;

• unexpected difficulties and losses related to FDIC-assisted acquisitions;

• harm to the Company’s reputation;

• any negative perception of the Company’s financial strength;

• ability of the Company to raise additional capital on acceptable terms when needed;

• disruption in capital markets, which may lower fair values for the Company’s investment portfolio;

• ability of the Company to use technology to provide products and services that will satisfy customer demands and create efficiencies in operations and to manage risks associated therewith;

• failure or breaches of our security systems or infrastructure, or those of third parties;

• security breaches, including denial of service attacks, hacking, social engineering attacks, malware intrusion or data corruption attempts and identity theft;

• adverse effects on our information technology systems resulting from failures, human error or cyberattacks;

• adverse effects of failures by our vendors to provide agreed upon services in the manner and at the cost agreed, particularly our information technology vendors;

• increased costs as a result of protecting our customers from the impact of stolen debit card information;

• accuracy and completeness of information the Company receives about customers and counterparties to make credit decisions;

• ability of the Company to attract and retain senior management experienced in the banking and financial services industries;

• environmental liability risk associated with lending activities;

• the impact of any claims or legal actions to which the Company is subject, including any effect on our reputation;

• losses incurred in connection with repurchases and indemnification payments related to mortgages and increases in reserves associated therewith;

• the loss of customers as a result of technological changes allowing consumers to complete their financial transactions without

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the use of a bank;

• the soundness of other financial institutions;

• the expenses and delayed returns inherent in opening new branches and de novo banks;

• examinations and challenges by tax authorities, and any unanticipated impact of the Tax Act;

• changes in accounting standards, rules and interpretations such as the new CECL standard, and the impact on the Company’s financial statements;

• the ability of the Company to receive dividends from its subsidiaries;

• uncertainty about the future of LIBOR;

• a decrease in the Company’s capital ratios, including as a result of declines in the value of its loan portfolios, or otherwise;

• legislative or regulatory changes, particularly changes in regulation of financial services companies and/or the products and services offered by financial services companies;

• a lowering of our credit rating;

• changes in U.S. monetary policy and changes to the Federal Reserve’s balance sheet as a result of the end of its program of quantitative easing or otherwise;

• restrictions upon our ability to market our products to consumers and limitations on our ability to profitably operate our mortgage business resulting from the Dodd-Frank Act;

• increased costs of compliance, heightened regulatory capital requirements and other risks associated with changes in regulation and the regulatory environment;

• the impact of heightened capital requirements;

• increases in the Company’s FDIC insurance premiums, or the collection of special assessments by the FDIC;

• delinquencies or fraud with respect to the Company’s premium finance business;

• credit downgrades among commercial and life insurance providers that could negatively affect the value of collateral securing the Company’s premium finance loans;

• the Company’s ability to comply with covenants under its credit facility; and

• fluctuations in the stock market, which may have an adverse impact on the Company’s wealth management business and brokerage operation.

Therefore, there can be no assurances that future actual results will correspond to these forward-looking statements. The reader is cautioned not to place undue reliance on any forward-looking statement made by the Company. Any such statement speaks only as of the date the statement was made or as of such date that may be referenced within the statement. The Company undertakes no obligation to update any forward-looking statement to reflect the impact of circumstances or events that arise after the date of this report. Persons are advised, however, to consult further disclosures management makes on related subjects in its reports filed with the Securities and Exchange Commission and in its press releases.

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ITEM 3

QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

As an ongoing part of its financial strategy, the Company attempts to manage the impact of fluctuations in market interest rates on net interest income. This effort entails providing a reasonable balance between interest rate risk, credit risk, liquidity risk and maintenance of yield. Asset-liability management policies are established and monitored by management in conjunction with the boards of directors of the banks, subject to general oversight by the Risk Management Committee of the Company’s Board of Directors. The policies establish guidelines for acceptable limits on the sensitivity of the market value of assets and liabilities to changes in interest rates.

Interest rate risk arises when the maturity or re-pricing periods and interest rate indices of the interest earning assets, interest bearing liabilities, and derivative financial instruments are different. It is the risk that changes in the level of market interest rates will result in disproportionate changes in the value of, and the net earnings generated from, the Company’s interest earning assets, interest bearing liabilities and derivative financial instruments. The Company continuously monitors not only the organization’s current net interest margin, but also the historical trends of these margins. In addition, management attempts to identify potential adverse changes in net interest income in future years as a result of interest rate fluctuations by performing simulation analysis of various interest rate environments. If a potential adverse change in net interest margin and/or net income is identified, management would take appropriate actions with its asset-liability structure to mitigate these potentially adverse situations.

Since the Company’s primary source of interest bearing liabilities is from customer deposits, the Company’s ability to manage the types and terms of such deposits is somewhat limited by customer preferences and local competition in the market areas in which the banks operate. The rates, terms and interest rate indices of the Company’s interest earning assets result primarily from the Company’s strategy of investing in loans and securities that permit the Company to limit its exposure to interest rate risk, together with credit risk, while at the same time achieving an acceptable interest rate spread.

The Company’s exposure to interest rate risk is reviewed on a regular basis by management and the Risk Management Committees of the boards of directors of the banks and the Company. The objective of the review is to measure the effect on net income and to adjust balance sheet and derivative financial instruments to minimize the inherent risk while at the same time maximize net interest income.

The following interest rate scenarios display the percentage change in net interest income over a one-year time horizon assuming increases of 100 and 200 basis points and decreases of 100 basis points. The Static Shock Scenario results incorporate actual cash flows and repricing characteristics for balance sheet instruments following an instantaneous, parallel change in market rates based upon a static (i.e. no growth or constant) balance sheet. Conversely, the Ramp Scenario results incorporate management’s projections of future volume and pricing of each of the product lines following a gradual, parallel change in market rates over twelve months. Actual results may differ from these simulated results due to timing, magnitude, and frequency of interest rate changes as well as changes in market conditions and management strategies. The interest rate sensitivity for both the Static Shock and Ramp Scenarios at September 30, 2018, June 30, 2018 and September 30, 2017 is as follows:

Static Shock Scenarios	+200 Basis Points		+100 Basis Points		-100 Basis Points
September 30, 2018	18.1	%	9.1	%	(10.0	)%
June 30, 2018	19.3	%	9.7	%	(10.7	)%
September 30, 2017	19.5	%	9.8	%	(12.9	)%

Ramp Scenarios	+200 Basis Points		+100 Basis Points		-100 Basis Points
September 30, 2018	8.5	%	4.3	%	(4.2	)%
June 30, 2018	8.7	%	4.5	%	(4.4	)%
September 30, 2017	9.0	%	4.6	%	(5.3	)%

One method utilized by financial institutions, including the Company, to manage interest rate risk is to enter into derivative financial instruments. Derivative financial instruments include interest rate swaps, interest rate caps, floors and collars, futures, forwards, option contracts and other financial instruments with similar characteristics. Additionally, the Company enters into commitments to fund certain mortgage loans (interest rate locks) to be sold into the secondary market and forward commitments for the future

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delivery of mortgage loans to third party investors. See Note 15 of the Consolidated Financial Statements in Item 1 of this report for further information on the Company’s derivative financial instruments.

During the first nine months of 2018 and 2017, the Company entered into certain covered call option transactions related to certain securities held by the Company. The Company uses these option transactions (rather than entering into other derivative interest rate contracts, such as interest rate floors) to economically hedge positions and compensate for net interest margin compression by increasing the total return associated with the related securities through fees generated from these options. Although the revenue received from these options is recorded as non-interest income rather than interest income, the increased return attributable to the related securities from these options contributes to the Company’s overall profitability. The Company’s exposure to interest rate risk may be impacted by these transactions. To mitigate this risk, the Company may acquire fixed rate term debt or use financial derivative instruments. There were no covered call options outstanding as of September 30, 2018 and 2017.

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ITEM 4

CONTROLS AND PROCEDURES

As of the end of the period covered by this report, the Company’s Chief Executive Officer and Chief Financial Officer carried out an evaluation under their supervision, with the participation of other members of management as they deemed appropriate, of the effectiveness of the design and operation of the Company’s disclosure controls and procedures as contemplated by Exchange Act Rule 13a-15. Based upon, and as of the date of that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that the Company’s disclosure controls and procedures are effective, in all material respects, in timely alerting them to material information relating to the Company (and its consolidated subsidiaries) required to be included in the periodic reports the Company is required to file and submit to the SEC under the Exchange Act.

There were no changes in the Company’s internal control over financial reporting (as defined in Exchange Act Rule 13a-15(f)) during the period that have materially affected, or are reasonably likely to materially affect, our internal controls over financial reporting.

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PART II —

Item 1: Legal Proceedings

In accordance with applicable accounting principles, the Company establishes an accrued liability for litigation and threatened litigation actions and proceedings when those actions present loss contingencies which are both probable and estimable. In actions for which a loss is reasonably possible in future periods, the Company determines whether it can estimate a loss or range of possible loss. To determine whether a possible loss is estimable, the Company reviews and evaluates its material litigation on an ongoing basis, in conjunction with any outside counsel handling the matter, in light of potentially relevant factual and legal developments. This review may include information learned through the discovery process, rulings on substantive or dispositive motions, and settlement discussions.

On January 15, 2015, Lehman Brothers Holdings, Inc. (“Lehman Holdings”) sent a demand letter asserting that Wintrust Mortgage must indemnify it for losses arising from loans sold by Wintrust Mortgage to Lehman Brothers Bank, FSB under a Loan Purchase Agreement between Wintrust Mortgage, as successor to SGB Corporation, and Lehman Brothers Bank. The demand was the precursor for triggering the alternative dispute resolution process mandated by the U.S. Bankruptcy Court for the Southern District of New York. Lehman Holdings triggered the mandatory alternative dispute resolution process on October 16, 2015. On February 3, 2016, following a ruling by the federal Court of Appeals for the Tenth Circuit that was adverse to Lehman Holdings on the statute of limitations that is applicable to similar loan purchase claims, Lehman Holdings filed a complaint against Wintrust Mortgage and 150 other entities from which it had purchased loans in the U.S. Bankruptcy Court for the Southern District of New York. The mandatory mediation was held on March 16, 2016, but did not result in a consensual resolution of the dispute. The court entered a case management order governing the litigation on November 1, 2016. Lehman Holdings filed an amended complaint against Wintrust Mortgage on December 29, 2016. On March 31, 2017, Wintrust Mortgage moved to dismiss the amended complaint for lack of subject matter jurisdiction and improper venue or to transfer venue. Argument on the motions to dismiss were heard on June 12, 2018. The motion to dismiss for lack of subject matter jurisdiction was denied on August 14, 2018 and the defendants’ motion to transfer venue denied on October 2, 2018. Wintrust Mortgage has appealed the denial of its motion to dismiss based on improper venue and its motion to transfer venue.

On October 2, 2018, Lehman Holdings asked the court for permission to amend its complaints against Wintrust Mortgage and the other defendants to add loans allegedly purchased from the defendants and sold to various RMBS trusts. The court has considered the request and indicated her willingness to allow Lehman Holdings to assert the additional claims, but no determination of the procedure Lehman Holdings should use to assert the new claims, whether via amendment or a supplemental pleading, has been made. Lehman Holdings has not provided Wintrust Mortgage with sufficient information to allow Wintrust Mortgage to assess the merits of Lehman Holding’s additional claims or to estimate either the likelihood or amount of any potential liability for the additional claims.

The Company has reserved an amount for the Lehman Holdings action that is immaterial to its results of operations or financial condition. Such litigation and threatened litigation actions necessarily involve substantial uncertainty and it is not possible at this time to predict the ultimate resolution or to determine whether, or to what extent, any loss with respect to these legal proceedings may exceed the amounts reserved by the Company.

On April 9, 2018, JPMorgan Chase & Co. as successor in interest to Bear Stearns and certain related Bear Stearns entities (collectively, “JPMC”) sent a demand letter to Wintrust Mortgage asserting an indemnification claim of approximately $4.6 million. JPMC alleges that it incurred this loss due to its reliance on misrepresentations in the loans Wintrust Mortgage originated, underwrote and sold to JPMC in the years prior to 2009. JPMC has since amended and reduced its claim to an immaterial amount. JPMC has not provided Wintrust Mortgage with sufficient information concerning the loans allegedly at issue to allow Wintrust Mortgage to assess the merits of JPMC’s allegations or to estimate either the likelihood or amount of any potential liability.

In addition, the Company and its subsidiaries, from time to time, are subject to pending and threatened legal action and proceedings arising in the ordinary course of business.

Based on information currently available and upon consultation with counsel, management believes that the eventual outcome of any pending or threatened legal actions and proceedings described above, including our ordinary course litigation, will not have a material adverse effect on the operations or financial condition of the Company. However, it is possible that the ultimate resolution of these matters, if unfavorable, may be material to the results of operations or financial condition for a particular period.

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Item 1A: Risk Factors

There have been no material changes from the risk factors set forth under Part I, Item 1A “Risk Factors” in the Company’s Form 10-K for the fiscal year ended December 31, 2017.

Item 2: Unregistered Sales of Equity Securities and Use of Proceeds

No purchases of the Company’s common shares were made by or on behalf of the Company or any “affiliated purchaser” as defined in Rule 10b-18(a)(3) under the Securities Exchange Act of 1934, as amended, during the three months ended September 30, 2018. There is currently no authorization to repurchase shares of outstanding common stock.

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Item 6: Exhibits:

(a) Exhibits

10.1	Credit Agreement, dated as of September 18, 2018, among the Company, the lenders named therein, and Wells Fargo Bank, N.A., as administrative agent (incorporated by reference to Exhibit 10.1 of the Company's Current Report on Form 8-K filed with the Securities and Exchange Commission on September 19, 2018).
31.1	Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1	Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS	XBRL Instance Document (1)
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document

(1) Includes the following financial information included in the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2018, formatted in XBRL (eXtensible Business Reporting Language): (i) the Consolidated Statements of Condition, (ii) the Consolidated Statements of Income, (iii) the Consolidated Statements of Comprehensive Income, (iv) the Consolidated Statements of Changes in Shareholders’ Equity, (v) the Consolidated Statements of Cash Flows, and (vi) Notes to Consolidated Financial Statements

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

		WINTRUST FINANCIAL CORPORATION (Registrant)
Date:	November 9, 2018	/s/ DAVID L. STOEHR
		David L. Stoehr
		Executive Vice President and Chief Financial Officer (Principal Financial and Accounting Officer)

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EX-31.1

Exhibit 31.1

CERTIFICATION

I, Edward J. Wehmer, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Wintrust Financial Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounted principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 9, 2018

/s/ EDWARD J. WEHMER

Name:    Edward J. Wehmer

Title:      President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, David L. Stoehr, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Wintrust Financial Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounted principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 9, 2018

/s/ DAVID L. STOEHR

Name:    David L. Stoehr

Title:      Executive Vice President and

               Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATIONS

SARBANES-OXLEY ACT SECTION 906

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350, the undersigned Chief Executive Officer and Chief Financial Officer of Wintrust Financial Corporation (“the Company”) certify, on the basis of such officers’ knowledge and belief that:

(1) The Quarterly Report of the Company on Form 10-Q for the period ended September 30, 2018, as filed with the Securities and Exchange Commission on November 9, 2018, (the “Report”) fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ EDWARD J. WEHMER

Name:    Edward J. Wehmer

Title:      President and Chief Executive Officer

Date:      November 9, 2018

/s/ DAVID L. STOEHR

Name:    David L. Stoehr

Title:      Executive Vice President and

               Chief Financial Officer

Date:      November 9, 2018

A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission upon request. This certification accompanies the Report and shall not be treated as having been filed as part of this Report.

XML

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Oct. 31, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3
Entity Current Reporting Status	Yes
Trading Symbol	WTFC
Entity Registrant Name	WINTRUST FINANCIAL CORP
Entity Central Index Key	0001015328
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		56,392,334

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Consolidated Statements Of Condition - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Assets
Cash and due from banks	$ 279,936	$ 277,534	$ 251,896
Federal funds sold and securities purchased under resale agreements	57	57	56
Interest bearing deposits with banks	1,137,044	1,063,242	1,218,728
Available-for-sale securities, at fair value	2,164,985	1,803,666	1,665,903
Held-to-maturity securities, at amortized cost ($911.6 million, $812.5 million and $807.0 million fair value at September 30, 2018, December 31, 2017 and September 30, 2017 respectively)	966,438	826,449	819,340
Trading account securities	688	995	643
Equity securities with readily determinable fair value	36,414	0	0
Federal Home Loan Bank and Federal Reserve Bank stock	99,998	89,989	87,192
Brokerage customer receivables	15,649	26,431	23,631
Mortgage loans held-for-sale, at fair value	338,111	313,592	370,282
Loans, net of unearned income, excluding covered loans	23,123,951	21,640,797	20,912,781
Covered loans	0	0	46,601
Total loans	23,123,951	21,640,797	20,959,382
Allowance for loan losses	(149,756)	(137,905)	(133,119)
Allowance for covered loan losses	0	0	(758)
Net loans	22,974,195	21,502,892	20,825,505
Premises and equipment, net	664,469	621,895	609,978
Lease investments, net	199,241	212,335	193,828
Accrued interest receivable and other assets	700,568	567,374	580,612
Trade date securities receivable	0	90,014	189,896
Goodwill	537,560	501,884	502,021
Other intangible assets	27,378	17,621	18,651
Total assets	30,142,731	27,915,970	27,358,162
Deposits:
Non-interest bearing	6,399,213	6,792,497	6,502,409
Interest bearing	18,517,502	16,390,850	16,392,654
Total deposits	24,916,715	23,183,347	22,895,063
Federal Home Loan Bank advances	615,000	559,663	468,962
Other borrowings	373,571	266,123	251,680
Subordinated notes	139,172	139,088	139,052
Junior subordinated debentures	253,566	253,566	253,566
Trade date securities payable	0	0	880
Accrued interest payable and other liabilities	664,885	537,244	440,034
Total liabilities	26,962,909	24,939,031	24,449,237
Preferred stock, no par value; 20,000,000 shares authorized:
Common stock, no par value; $1.00 stated value; 100,000,000 shares authorized at September 30, 2018, December 31, 2017 and September 30, 2017; 56,486,573 shares issued at September 30, 2018, 56,068,220 shares issued at December 31, 2017 and 55,939,801 shares issued at September 30, 2017	56,486	56,068	55,940
Surplus	1,553,353	1,529,035	1,519,596
Treasury stock, at cost, 109,404 shares at September 30, 2018, 103,013 shares at December 31, 2017, and 101,738 shares at September 30, 2017	(5,547)	(4,986)	(4,884)
Retained earnings	1,543,680	1,313,657	1,254,759
Accumulated other comprehensive loss	(93,150)	(41,835)	(41,486)
Total shareholders’ equity	3,179,822	2,976,939	2,908,925
Total liabilities and shareholders’ equity	30,142,731	27,915,970	27,358,162
Series D - $25 liquidation value; 5,000,000 shares issued and outstanding at September 30, 2018, December 31, 2017 and September 30, 2017
Preferred stock, no par value; 20,000,000 shares authorized:
Series D - $25 liquidation value; 5,000,000 shares issued and outstanding at September 30, 2018, December 31, 2017 and September 30, 2017	$ 125,000	$ 125,000	$ 125,000

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Consolidated Statements Of Condition (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Held-to-maturity securities, at Fair value	$ 911,597	$ 812,516	$ 807,036
Preferred stock, shares authorized (in shares)	20,000,000	20,000,000	20,000,000
Common stock, $1.00 stated value (usd per share)	$ 1.00	$ 1.00	$ 1.00
Common stock, 100,000,000 shares authorized (in shares)	100,000,000	100,000,000	100,000,000
Common stock, shares issued (in shares)	56,486,573	56,068,220	55,939,801
Treasury stock, (in shares)	109,404	103,013	101,738
Series D Preferred Stock
Preferred stock, liquidation value per share (usd per share)	$ 25	$ 25	$ 25
Preferred stock, shares outstanding (in shares)	5,000,000	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	5,000,000	5,000,000	5,000,000

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Consolidated Statements Of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Interest income
Interest and fees on loans	$ 271,134	$ 223,897	$ 761,191	$ 628,876
Mortgage loans held-for-sale	5,285	3,223	12,329	10,267
Interest bearing deposits with banks	5,423	3,272	11,462	6,529
Federal funds sold and securities purchased under resale agreements	0	0	1	2
Investment securities	21,710	16,058	60,726	45,155
Trading account securities	11	8	29	23
Federal Home Loan Bank and Federal Reserve Bank stock	1,235	1,080	3,988	3,303
Brokerage customer receivables	164	150	488	473
Total interest income	304,962	247,688	850,214	694,628
Interest expense
Interest on deposits	48,736	23,655	110,578	58,396
Interest on Federal Home Loan Bank advances	1,947	2,151	9,849	6,674
Interest on other borrowings	2,003	1,482	5,400	3,770
Interest on subordinated notes	1,773	1,772	5,333	5,330
Interest on junior subordinated debentures	2,940	2,640	8,239	7,481
Total interest expense	57,399	31,700	139,399	81,651
Net interest income	247,563	215,988	710,815	612,977
Provision for credit losses	11,042	7,896	24,431	21,996
Net interest income after provision for credit losses	236,521	208,092	686,384	590,981
Non-interest income
Wealth management	22,634	19,803	68,237	59,856
Mortgage banking	42,014	28,184	112,808	86,061
Gains (losses) on investment securities, net	90	39	(249)	31
Fees from covered call options	627	1,143	2,893	2,792
Trading (losses) gains, net	(61)	(129)	166	(869)
Operating lease income, net	9,132	8,461	27,569	21,048
Other	16,163	13,585	42,079	43,943
Total non-interest income	99,930	79,731	280,842	238,468
Non-interest expense
Salaries and employee benefits	123,855	106,251	357,966	312,069
Equipment	10,827	9,947	31,426	28,858
Operating lease equipment depreciation	7,370	6,794	20,843	17,092
Occupancy, net	14,404	13,079	41,834	38,766
Data processing	9,335	7,851	26,580	23,580
Advertising and marketing	11,120	9,572	31,726	23,448
Professional fees	9,914	6,786	23,047	18,956
Amortization of other intangible assets	1,163	1,068	3,164	3,373
FDIC insurance	4,205	3,877	13,165	11,907
OREO expense, net	596	590	4,502	2,994
Other	20,848	17,760	60,502	54,194
Total non-interest expense	213,637	183,575	614,755	535,237
Income before taxes	122,814	104,248	352,471	294,212
Income tax expense	30,866	38,622	88,962	105,311
Net income	91,948	65,626	263,509	188,901
Preferred stock dividends	2,050	2,050	6,150	7,728
Net income applicable to common shares	$ 89,898	$ 63,576	$ 257,359	$ 181,173
Net income per common share-Basic (usd per share)	$ 1.59	$ 1.14	$ 4.57	$ 3.34
Net income per common share-Diluted (usd per share)	1.57	1.12	4.50	3.23
Cash dividends declared per common share (usd per share)	$ 0.19	$ 0.14	$ 0.57	$ 0.42
Weighted average common shares outstanding (in shares)	56,366	55,796	56,268	54,292
Dilutive potential common shares (in shares)	918	966	912	2,305
Average common shares and dilutive common shares (in shares)	57,284	56,762	57,180	56,597
Service charges on deposit accounts
Non-interest income
Non-interest income	$ 9,331	$ 8,645	$ 27,339	$ 25,606

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Consolidated Statements Of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 91,948	$ 65,626	$ 263,509	$ 188,901
Unrealized (losses) gains on available-for-sale securities
Before tax	(18,149)	811	(63,788)	25,783
Tax effect	4,872	(158)	17,123	(9,968)
Net of tax	(13,277)	653	(46,665)	15,815
Reclassification of net gains on available-for-sale securities included in net income
Before tax	1,001	39	6	31
Tax effect	(271)	(15)	(1)	(12)
Net of tax	730	24	5	19
Reclassification of amortization of unrealized gains and losses on investment securities transferred to held-to-maturity from available-for-sale
Before tax	33	33	49	1,483
Tax effect	(9)	(13)	(13)	(583)
Net of tax	24	20	36	900
Net unrealized (losses) gains on available-for-sale securities	(14,031)	609	(46,706)	14,896
Unrealized gains on derivative instruments
Before tax	212	394	4,369	1,699
Tax effect	(57)	(158)	(1,173)	(669)
Net unrealized gains on derivative instruments	155	236	3,196	1,030
Foreign currency adjustment
Before tax	2,586	5,643	(3,927)	10,678
Tax effect	(644)	(1,437)	976	(2,762)
Net foreign currency adjustment	1,942	4,206	(2,951)	7,916
Total other comprehensive (loss) income	(11,934)	5,051	(46,461)	23,842
Comprehensive income	$ 80,014	$ 70,677	$ 217,048	$ 212,743

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Consolidated Statements Of Changes In Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Preferred stock	Common stock	Surplus	Treasury stock	Retained earnings	Accumulated other comprehensive loss	Series C Preferred Stock Preferred stock	Series C Preferred Stock Common stock	Series C Preferred Stock Surplus
Balance at the beginning at Dec. 31, 2016	$ 2,695,617	$ 251,257	$ 51,978	$ 1,365,781	$ (4,589)	$ 1,096,518	$ (65,328)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	188,901					188,901
Other comprehensive income, net of tax	23,842						23,842
Cash dividends declared on common stock	(22,932)					(22,932)
Dividends on preferred stock	(7,728)					(7,728)
Stock-based compensation	8,160			8,160
Conversion of Series C preferred stock to common stock								$ (126,257)	$ 3,121	$ 123,136
Common stock issued for:
Exercise of stock options and warrants	20,246		702	19,544
Restricted stock awards	(295)		79	(79)	(295)
Employee stock purchase plan	1,921		28	1,893
Director compensation plan	1,193		32	1,161
Balance at the end at Sep. 30, 2017	2,908,925	125,000	55,940	1,519,596	(4,884)	1,254,759	(41,486)
Balance at the beginning at Jun. 30, 2017							(46,537)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	65,626
Other comprehensive income, net of tax	5,051
Balance at the end at Sep. 30, 2017	2,908,925	125,000	55,940	1,519,596	(4,884)	1,254,759	(41,486)
Balance at the beginning at Dec. 31, 2017	2,976,939	125,000	56,068	1,529,035	(4,986)	1,313,657	(41,835)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	263,509					263,509
Other comprehensive income, net of tax	(46,461)						(46,461)
Cash dividends declared on common stock	(32,074)					(32,074)
Dividends on preferred stock	(6,150)					(6,150)
Stock-based compensation	10,346			10,346
Common stock issued for:
Exercise of stock options and warrants	11,043		283	10,952	(192)
Restricted stock awards	(369)		93	(93)	(369)
Employee stock purchase plan	1,885		23	1,862
Director compensation plan	1,270		19	1,251
Balance at the end at Sep. 30, 2018	3,179,822	125,000	56,486	1,553,353	(5,547)	1,543,680	(93,150)
Balance at the beginning at Jun. 30, 2018							(81,216)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	91,948
Other comprehensive income, net of tax	(11,934)
Balance at the end at Sep. 30, 2018	$ 3,179,822	$ 125,000	$ 56,486	$ 1,553,353	$ (5,547)	$ 1,543,680	$ (93,150)

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Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Operating Activities:
Net income	$ 263,509	$ 188,901
Adjustments to reconcile net income to net cash provided by operating activities
Provision for credit losses	24,431	21,996
Depreciation, amortization and accretion, net	48,908	46,514
Stock-based compensation expense	10,346	8,160
Net amortization of premium on securities	5,998	4,694
Accretion of discount on loans	(15,510)	(16,885)
Mortgage servicing rights fair value change, net	(3,660)	1,338
Originations and purchases of mortgage loans held-for-sale	(3,027,658)	(2,812,685)
Proceeds from sales of mortgage loans held-for-sale	3,060,577	2,916,368
Bank owned life insurance (BOLI) income	(5,448)	(2,770)
Decrease in trading securities, net	307	1,346
Net decrease in brokerage customer receivables	10,782	1,550
Gains on mortgage loans sold	(80,826)	(67,239)
Losses (gains) on investment securities, net	249	(31)
Gains on sales of premises and equipment, net	(34)	(88)
Net losses on sales and fair value adjustments of other real estate owned	3,808	969
Increase in accrued interest receivable and other assets, net	(97,844)	(63,064)
Increase (decrease) in accrued interest payable and other liabilities, net	63,166	(80,099)
Net Cash Provided by Operating Activities	261,101	148,975
Investing Activities:
Proceeds from maturities and calls of available-for-sale securities	222,387	215,522
Proceeds from maturities and calls of held-to-maturity securities	8,061	102,361
Proceeds from sales of available-for-sale securities	209,640	121,795
Proceeds from sales of equity securities with readily determinable fair value	1,895	0
Proceeds from sales and capital distributions of equity securities without readily determinable fair value	680	0
Purchases of available-for-sale securities	(777,324)	(446,278)
Purchases of held-to-maturity securities	(148,865)	(287,976)
Purchases of equity securities without readily determinable fair value	(3,779)	0
(Purchase) redemption of Federal Home Loan Bank and Federal Reserve Bank stock, net	(10,009)	46,302
Distributions from investments in partnerships, net	3,181	465
Net cash paid in business combinations	(13,749)	(284)
Proceeds from sales of other real estate owned	16,892	12,892
Cash paid to the FDIC related to reimbursements on covered assets	0	(258)
Net increase in interest bearing deposits with banks	(75,636)	(236,531)
Net increase in loans	(1,304,555)	(1,176,279)
Redemption of BOLI	8,134	0
Purchases of premises and equipment, net	(52,639)	(39,583)
Net Cash Used for Investing Activities	(1,915,686)	(1,687,852)
Financing Activities:
Increase in deposit accounts	1,520,270	1,236,548
Increase (decrease) in subordinated notes and other borrowings, net	109,112	(20,111)
Increase in Federal Home Loan Bank advances, net	52,000	313,000
Cash payments to settle contingent consideration liabilities recognized in business combinations	0	(1,058)
Issuance of common shares resulting from the exercise of stock options, employee stock purchase plan and conversion of common stock warrants	14,390	23,360
Common stock repurchases for tax withholdings related to stock-based compensation	(561)	(295)
Dividends paid	(38,224)	(30,660)
Net Cash Provided by Financing Activities	1,656,987	1,520,784
Net Increase (Decrease) in Cash and Cash Equivalents	2,402	(18,093)
Cash and Cash Equivalents at Beginning of Period	277,591	270,045
Cash and Cash Equivalents at End of Period	$ 279,993	$ 251,952

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Basis of Presentation

9 Months Ended

Sep. 30, 2018

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

The consolidated financial statements of Wintrust Financial Corporation and Subsidiaries (“Wintrust” or the “Company”) presented herein are unaudited, but in the opinion of management reflect all necessary adjustments of a normal or recurring nature for a fair presentation of results as of the dates and for the periods covered by the consolidated financial statements.

The accompanying consolidated financial statements are unaudited and do not include information or footnotes necessary for a complete presentation of financial condition, results of operations or cash flows in accordance with U.S. generally accepted accounting principles ("GAAP"). The unaudited consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017 (“2017 Form 10-K”). Operating results reported for the period are not necessarily indicative of the results which may be expected for the entire year. Reclassifications of certain prior period amounts have been made to conform to the current period presentation.

The preparation of the financial statements requires management to make estimates, assumptions and judgments that affect the reported amounts of assets and liabilities. Management believes that the estimates made are reasonable, however, changes in estimates may be required if economic or other conditions develop differently from management’s expectations. Certain policies and accounting principles inherently have a greater reliance on the use of estimates, assumptions and judgments and as such have a greater possibility of producing results that could be materially different than originally reported. Management views critical accounting policies to be those which are highly dependent on subjective or complex judgments, estimates and assumptions, and where changes in those estimates and assumptions could have a significant impact on the financial statements. Management currently views the determination of the allowance for loan losses and the allowance for losses on lending-related commitments, loans acquired with evidence of credit quality deterioration since origination, estimations of fair value, the valuations required for impairment testing of goodwill, the valuation and accounting for derivative instruments and income taxes as the accounting areas that require the most subjective and complex judgments, and as such could be the most subject to revision as new information becomes available. Descriptions of the Company's significant accounting policies are included in Note 1 - “Summary of Significant Accounting Policies” of the 2017 Form 10-K.

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Recent Accounting Developments

9 Months Ended

Sep. 30, 2018

New Accounting Pronouncements and Changes in Accounting Principles [Abstract]

Recent Accounting Developments

Recent Accounting Developments

Revenue Recognition

In May 2014, the Financial Accounting Standards Board ("FASB") issued ASU No. 2014-09, which created “Revenue from Contracts with Customers (Topic 606),” to clarify the principles for recognizing revenue and develop a common revenue standard for customer contracts. This ASU provides guidance regarding how an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The ASU also added a new subtopic to the codification, ASC 340-40, “Other Assets and Deferred Costs: Contracts with Customers” to provide guidance on costs related to obtaining and fulfilling a customer contract. Furthermore, the new standard requires disclosure of sufficient information to enable users of financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. At the time ASU No. 2014-09 was issued, the guidance was effective for fiscal years beginning after December 15, 2016. In July 2015, the FASB approved a deferral of the effective date by one year, which resulted in the guidance becoming effective for the Company as of January 1, 2018.

The FASB continued to issue various updates to clarify and improve specific areas of ASU No. 2014-09. In March 2016, the FASB issued ASU No. 2016-08, “Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net),” to clarify the implementation guidance within ASU No. 2014-09 surrounding principal versus agent considerations and its impact on revenue recognition. In April 2016, the FASB issued ASU No. 2016-10, “Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing,” to also clarify the implementation guidance within ASU No. 2014-09 related to these two topics. In May 2016, the FASB issued ASU No. 2016-11, “Revenue Recognition (Topic 605) and Derivative and Hedging (Topic 815): Rescission of SEC Guidance Because of Accounting Standards Updates 2014-09 and 2014-16 Pursuant to Staff Announcements at the March 3, 2016 EITF Meeting,” to remove certain areas of SEC Staff Guidance from those specific Topics. In May 2016 and December 2016, the FASB issued ASU 2016-12, “Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients” and ASU 2016-20, “Technical Corrections and Improvements to Topic 606, Revenue from Contracts with Customers,” to clarify specific aspects of implementation, including the collectability criterion, exclusion of sales taxes collected from a transaction price, noncash consideration, contract modifications, completed contracts at transition, the applicability of loan guarantee fees, impairment of capitalized contract costs and certain disclosure requirements. In February 2017, the FASB issued ASU No. 2017-05, “Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets,” to clarify the implementation guidance within ASU No. 2014-09 surrounding transfers of nonfinancial assets, including partial sales of such assets, and its impact on revenue recognition. Like ASU No. 2014-09, this guidance became effective for the Company starting January 1, 2018.

The Company adopted ASU No. 2014-09 and all subsequent updates issued to clarify and improve specific areas of this ASU as of January 1, 2018. As certain significant revenue sources related to financial instruments such as interest income are considered not in-scope, the new guidance did not have a significant impact on the Company's consolidated financial statements. Revenue sources impacted by the new guidance include brokerage and trust and asset management fees from the wealth management business unit, card-based fees, deposit-related fees and other non-interest income. During implementation, the Company reviewed specific contracts with customers across these various sources of revenue. Reviews of such contracts assisted in identifying any characteristics of such contracts that could result in a change in the Company's current practices for recognition of revenue and recognition of costs incurred to obtain or fulfill such contracts. After review of such contracts, the Company identified no indication within the terms of such contracts that a significant change in the Company's current practices and accounting policies was necessary. The Company elected to adopt the new guidance using the modified retrospective approach applied to all contracts as of the date of initial application at January 1, 2018. Electing the modified retrospective approach resulted in no cumulative effect adjustment to the opening balance of retained earnings at the date of initial application. Additional disclosures have been added in accordance with the new guidance. See Note 13 – Revenue from Contracts with Customers for discussion of the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers.

Financial Instruments

In January 2016, the FASB issued ASU No. 2016-01, “Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities,” to improve the accounting for financial instruments. This ASU requires equity securities with readily determinable fair values to be measured at fair value with changes recognized in net income. Such equity securities with readily determinable fair values are no longer classified as available-for-sale securities or trading securities within the consolidated financial statements of an entity. For equity securities without a readily determinable fair value, the value of the equity securities may be elected to be measured at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer instead of fair value, unless a qualitative assessment indicates impairment. Additionally, this ASU requires the separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or the accompanying notes to the financial statements.

The Company adopted this guidance as of January 1, 2018. For equity securities with a readily determinable fair value, this guidance was applied under a modified retrospective approach with a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption. As of January 1, 2018, the Company reclassified approximately $1.9 million from accumulated other comprehensive income, related to previously recognized unrealized gains, net of deferred taxes, from equity securities with readily determinable fair values, to retained earnings. Equity securities with readily determinable fair values are now prospectively presented separate from available-for-sale securities and trading securities within the Company's Consolidated Statements of Condition. Additionally, for the nine months ended September 30, 2018, the Company recognized $456,000 of net unrealized gains from equity securities with readily determinable fair values directly to earnings. For equity securities without a readily determinable fair value, the Company elected to measure such investments at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer, unless a qualitative assessment indicates impairment, which was applied prospectively. Equity securities without readily determinable fair values are included within accrued interest receivable and other assets within the Company's Consolidated Statements of Condition. See Note 5 - Investment Securities for further discussion of equity securities with and without readily determinable fair values.

In January 2018, the FASB issued ASU No. 2018-03, “Technical Corrections and Improvements to Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities,” to clarify certain aspects of the guidance issued in ASU No. 2016-01, including aspects of equity securities without a readily determinable fair value. This guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years beginning after June 15, 2018. Early adoption is permitted. As these clarifications did not have a material impact on the Company's consolidated financial statements, the Company elected to early adopt this guidance as of January 1, 2018.

Leases

In February 2016, the FASB issued ASU No. 2016-02, “Leases (Topic 842),” to improve transparency and comparability across entities regarding leasing arrangements. This ASU requires the recognition of a separate lease liability representing the required discounted lease payments over the lease term and a separate lease asset representing the right to use the underlying asset during the same lease term. Further, this ASU provides clarification regarding the identification of certain components of contracts that would represent a lease as well as requires additional disclosures to the notes of the financial statements. Additionally, in January 2018, the FASB issued ASU No. 2018-01, "Leases (Topic 842): Land Easement Practical Expedient for Transition to Topic 842," to permit an entity to elect an optional practical expedient to not evaluate under Topic 842 land easements that exist or expired before the entity's adoption of Topic 842 and that were not previously accounted for as leases under existing accounting guidance. This guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, and is to be applied under a modified retrospective approach, including the option to apply certain practical expedients.

The FASB has continued to issue various updates to clarify and improve specific areas of ASU No. 2016-02. In July 2018, the FASB issued ASU No. 2018-10, “Codification Improvements to Topic 842, Leases,” to clarify the implementation guidance within ASU No. 2016-02 surrounding narrow aspects of Topic 842, including lessee reassessment of lease classifications, the rate implicit in a lease, lessor reassessment of lease terms and purchase options and variable lease payments that depend on an index or a rate. Also, in July 2018, the FASB issued ASU No. 2018-11, “Leases (Topic 842): Targeted Improvements,” to clarify the implementation guidance within ASU No. 2016-02 surrounding comparative period reporting requirements for initial adoption as well as separating lease and non-lease components in a contract and allocating consideration in the contract to the separate components. Like ASU No. 2016-02, this guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, and is to be applied under a modified retrospective approach.

The Company continues to evaluate the impact of adopting this new guidance on the consolidated financial statements. Excluding any impact from the clarification of contracts representing a lease, the Company expects to primarily recognize separate lease liabilities and right to use assets for the amounts related to certain facilities under operating lease agreements disclosed in Note 15 - Minimum Lease Commitments in the 2017 Form 10-K. Other leasing arrangements in which the Company expects to recognize separate lease liabilities and right to use assets include those related to the use of signage related to certain sponsorships and other agreements and certain automatic teller machines. The Company does not expect to significantly change operating lease agreements prior to adoption. The Company has established a committee consisting of individuals from various areas of the Company tasked with transitioning the Company to the new guidance requirements. The Company continues to review lease agreements related to certain assets as well as other agreements with components representing a lease across its various business units to determine the impact of adoption on the Company's consolidated financial statements. Additionally, the Company is reviewing methodologies for determining an appropriate discount rate for the measurement of separate lease liabilities and right of use assets. Current controls and processes are also being reviewed to determine any need for changes in response to the guidance.

Derivatives

In August 2017, the FASB issued ASU No. 2017-12, “Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities,” to improve the financial reporting of hedging relationships to better align the economic results of an entity’s risk management activities and disclosures within its financial statements. In addition, this ASU makes certain targeted improvements to simplify the application of the hedge accounting, including to derivative instruments as well as allow a one-time election to reclassify fixed-rate, prepayable debt securities from a held-to-maturity classification to an available-for-sale classification. This guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Guidance related to existing cash flow hedges and, if elected, fair value hedges is to be applied under a modified retrospective approach and guidance related to amended presentation and disclosures is to be applied under a prospective approach.

Early adoption is permitted as of the beginning of an annual period that has not been issued or made available for issuance. The Company elected to early adopt this guidance as of January 1, 2018. See Note 15 - Derivative Financial Instruments for further discussion of early adoption of this guidance. The impact of early adoption on the financial statements included the following:

• As allowed under the guidance, for certain existing derivative instruments designated as fair value hedges, the Company transitioned the measurement methodology for the related hedged item (loans) to be in accordance with the guidance without dedesignation of the hedging relationship. This resulted in a negative cumulative basis adjustment to loans of $116,000 with a corresponding adjustment to retained earnings.

• No fixed-rate, prepayable held-to-maturity securities were transferred to an available-for-sale classification.

• The entire change in the hedging instrument included in the assessment of hedge effectiveness of fair value hedges is presented in the same income statement line as the current impact of the effective portion of such hedge, or interest income and interest expense for interest rate hedging. The Company has previously recognized this ineffectiveness within non-interest income. For the first nine months of 2018, the Company recognized $55,000 of such change in interest income.

In October 2018, the FASB issued ASU No. 2018-16, “Derivatives and Hedging (Topic 815): Inclusion of the Secured Overnight Financing Rate (SOFR) Overnight Index Swap (OIS) Rate as a Benchmark Interest Rate for Hedge Accounting Purposes,” to permit the use of the OIS rate based on SOFR as a U.S. benchmark interest rate for hedge accounting purposes. This guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, and is to be applied prospectively for qualifying new or redesignated hedging relationships entered into on or after the date of adoption. Early adoption is permitted as the Company has early adopted ASU 2017-12 as discussed above.

Allowance for Credit Losses

In June 2016, the FASB issued ASU No. 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments,” to replace the current incurred loss methodology for recognizing credit losses, which delays recognition until it is probable a loss has been incurred, with a methodology that reflects an estimate of all expected credit losses and considers additional reasonable and supportable forecasted information when determining credit loss estimates. This impacts the calculation of an allowance for credit losses for all financial assets measured under the amortized cost basis, including held-to-maturity debt securities and PCI loans at the time of and subsequent to acquisition. Additionally, credit losses related to available-for-sale debt securities would be recorded through the allowance for credit losses and not as a direct adjustment to the amortized cost of the securities. This guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, and is to be applied under a modified retrospective approach.

The Company is currently evaluating the impact of adopting this new guidance on the consolidated financial statements as well as the impact on current systems and processes. Specifically, the Company has established a committee consisting of individuals from the various areas of the Company tasked with transitioning to the new requirements. At this time, the Company is finalizing potential accounting policy elections and potential modeling methodologies for estimating expected credit losses using reasonable and supportable forecast information. Additionally, the Company has identified certain historical data and system requirements and has selected platforms to build, store, execute and determine the financial impact. Current controls and processes are also being reviewed to determine any need for changes in response to the guidance.

Statement of Cash Flows

In August 2016, the FASB issued ASU No. 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (a consensus of the FASB Emerging Issues Task Force),” to clarify the presentation of specific types of cash flow receipts and payments, including the payment of debt prepayment or debt extinguishment costs, contingent consideration cash payments paid subsequent to the acquisition date and proceeds from settlement of BOLI policies. This guidance became effective as of January 1, 2018 and was applied under a retrospective approach resulting in additional disclosure, including cash payments made to settle contingent consideration liabilities recognized in prior business combinations.

In November 2016, the FASB issued ASU No. 2016-18 “Statement of Cash Flows (Topic 230): Restricted Cash (a consensus of the FASB Emerging Issues Task Force),” to clarify the classification and presentation of changes in restricted cash on the statement of cash flows. This guidance became effective as of January 1, 2018 and did not have a material impact on the Company.

Income Taxes

In October 2016, the FASB issued ASU No. 2016-16, “Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory,” to improve the accounting for intra-entity transfers of assets other than inventory. This ASU allows the recognition of current and deferred income taxes for such transfers prior to the subsequent sale of the transferred assets to an outside party. Initial recognition of current and deferred income taxes is currently prohibited for intra-entity transfers of assets other than inventory. This guidance became effective as of January 1, 2018 and did not have a material impact on the Company. 

The Tax Cuts and Jobs Act (the “Tax Act”) was enacted on December 22, 2017, and the Company recognized a provisional tax benefit of $7.6 million in 2017 to reflect the impact of the Tax Act, primarily reflecting estimated effects of a lower federal income tax rate on its net deferred tax liabilities and a transition tax due on the deferred earnings of the Company's Canadian subsidiary. Estimates were made in good faith and were subject to change as additional information and interpretive guidance regarding provisions of the Tax Act became available. Staff Accounting Bulletin 118 provides a measurement period, not to extend beyond one year from the date of enactment, during which a company may complete the accounting for the impacts of the Tax Act. During the three months ended September 30, 2018, the Company finalized the provisional amounts recorded for the year ended December 31, 2017 related to the Tax Cuts and Jobs Act and recorded an additional net tax benefit of $1.2 million.

Business Combinations

In January 2017, the FASB issued ASU No. 2017-01, “Business Combinations (Topic 805): Clarifying the Definition of a Business,” to improve such definition and, as a result, assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or as business combinations. The definition of a business impacts many areas of accounting including acquisitions, disposals, goodwill and consolidation. This guidance became effective as of January 1, 2018 and was applied under a prospective approach. See Note 3 - Business Combinations for further discussion of business combinations including the acquisition of Chicago Shore Corporation ("CSC") as well as the acquisition of certain assets and assumption of certain liabilities of the mortgage banking business of iFreedom Direct Corporation DBA Veterans First Mortgage ("Veterans First") during the current period.

Goodwill

In January 2017, the FASB issued ASU No. 2017-04, “Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment,” to simplify the subsequent measurement of goodwill. When the carrying amount of a reporting unit exceeds its fair value, an entity would no longer be required to determine goodwill impairment by assigning the fair value of a reporting unit to all of its assets and liabilities as if that reporting unit was acquired in a business combination. Goodwill impairment would be recognized according to the excess of the carrying amount of the reporting unit over the calculated fair value of such unit. This guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, and is to be applied under a prospective approach. The Company does not expect this guidance to have a material impact on the Company's consolidated financial statements.

Compensation

In March 2017, the FASB issued ASU No. 2017-07, “Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost,” to improve the presentation of net periodic pension cost and net periodic post-retirement benefit cost. An entity will be required to report the service cost component of such costs in the same line item or items as other compensation costs related to services rendered. Additionally, only the service cost component will be eligible for capitalization when applicable. This guidance became effective as of January 1, 2018 and was applied under a retrospective approach related to presentation of the service cost component and a prospective approach related to capitalization of such costs. Adoption of this guidance did not have a material impact on the Company's consolidated financial statements.

In May 2017, the FASB issued ASU No. 2017-09, “Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting,” to clarify when modification accounting is appropriate for changes to the terms and conditions of a share-based payment award. An entity will be required to account for such changes as a modification unless certain criteria is met. This guidance became effective as of January 1, 2018 and was applied under a prospective approach for awards modified on or after the adoption date. Adoption of this guidance did not have a material impact on the Company's consolidated financial statements.

Amortization of Premium on Certain Debt Securities

In March 2017, the FASB issued ASU No. 2017-08, “Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities,” to amend the amortization period for certain purchased callable debt securities held at a premium. The amortization period for such securities will be shortened to the earliest call date. This guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, and is to be applied under a modified retrospective approach. Early adoption is permitted as of the beginning of an annual period that has not been issued or made available for issuance. The Company did not early adopt this guidance as of January 1, 2018. The Company is currently evaluating the impact of adopting this new guidance on the consolidated financial statements.

Accumulated Other Comprehensive Income (Loss)

In February 2018, the FASB issued ASU No. 2018-02, “Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income,” to allow a reclassification from accumulated other comprehensive income to retained earnings related to the stranded tax effects within other comprehensive income resulting from the Federal income tax rate reduction in the Tax Act. This guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, and is to be applied either in the period of adoption or retrospectively to each period or periods in which the effect of the Tax Act is recognized.

Early adoption is permitted as of the beginning of an annual period that has not been issued or made available for issuance. The Company elected to early adopt this guidance as of January 1, 2018 and applied such reclassification in the current period (period of adoption). As of January 1, 2018, the Company reclassified a stranded credit of $3.0 million from accumulated other comprehensive income to retained earnings. The Company has a policy for releasing the income tax effects from accumulated other comprehensive income using an individual security approach.

Fair Value Measurement

In August 2018, the FASB issued ASU No. 2018-13, “Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirement for Fair Value Measurement,” to modify disclosure requirements on fair value measurements and inputs. This guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, and is to be applied prospectively or retrospectively depending upon the disclosure requirement. Early adoption is permitted.

Intangibles

In August 2018, the FASB issued ASU No. 2018-15, “Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract,” to align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with similar requirements related to implementation costs incurred to develop or obtain internal-use software. In addition, the amendment requires any capitalized implementation costs related to a hosting arrangement to be expensed over the term of the hosting arrangement. This guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, and is to be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. Early adoption is permitted, including adoption in any interim period. The Company is currently evaluating the impact of adopting this new guidance on the consolidated financial statements.

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Business Combinations

9 Months Ended

Sep. 30, 2018

Business Combinations [Abstract]

Business Combinations

Business Combinations

Non FDIC-Assisted Bank Acquisitions

On August 1, 2018, the Company acquired CSC. CSC was the parent company of Delaware Place Bank. Through this transaction, the Company acquired Delaware Place Bank’s one banking location in Chicago, Illinois. Delaware Place Bank was merged into the Company's wholly-owned subsidiary Wintrust Bank. The Company acquired assets with a fair value of approximately $282.2 million, including approximately $151.0 million of loans, and assumed deposits with a fair value of approximately $213.1 million. Additionally, the Company recorded goodwill of $27.2 million on the acquisition.

FDIC-Assisted Transactions

From 2010 to 2012, the Company acquired the banking operations, including the acquisition of certain assets and the assumption of liabilities, of nine financial institutions in FDIC-assisted transactions. Loans comprised the majority of the assets acquired in nearly all of these FDIC-assisted transactions, of which eight such transactions were subject to loss sharing agreements with the FDIC whereby the FDIC agreed to reimburse the Company for 80% of losses incurred on the purchased loans, other real estate owned (“OREO”), and certain other assets. Additionally, clawback provisions within these loss share agreements with the FDIC required the Company to reimburse the FDIC for actual losses on covered assets that were lower than the original loss estimates agreed upon with the FDIC with respect of such assets in the loss share agreements. The Company refers to the loans subject to these loss sharing agreements as “covered loans” and uses the term “covered assets” to refer to covered loans, covered OREO and certain other covered assets during periods subject to such agreements.

As of dates subject to such agreements, the loans covered by the loss share agreements were classified and presented as covered loans and the estimated reimbursable losses were recorded as an FDIC indemnification asset or liability in the Consolidated Statements of Condition. The Company recorded the acquired assets and liabilities at their estimated fair values at the acquisition date. The fair value for loans reflected expected credit losses at the acquisition date. Therefore, the Company only recognized a provision for credit losses and charge-offs on the acquired loans for any further credit deterioration subsequent to the acquisition date. See Note 7 — Allowance for Loan Losses, Allowance for Losses on Lending-Related Commitments and Impaired Loans for further discussion of the allowance on covered loans.

The loss share agreements with the FDIC covered realized losses on loans, foreclosed real estate and certain other assets and required the Company to record loss share assets and liabilities that were measured separately from the loan portfolios because they were not contractually embedded in the loans and were not transferable with the loans had the Company chosen to dispose of them. Fair values at the acquisition dates were estimated based on projected cash flows available for loss share based on the credit adjustments estimated for each loan pool and the loss share percentages. The loss share assets and liabilities were recorded as FDIC indemnification assets and other liabilities, respectively, on the Consolidated Statements of Condition as of dates covered by loss share agreements. Subsequent to the acquisition date, reimbursements received from the FDIC for actual incurred losses reduced the FDIC indemnification assets. Reductions to expected losses, to the extent such reductions to expected losses were the result of an improvement to the actual or expected cash flows from the covered assets, also reduced the FDIC indemnification assets and, if necessary, increased any loss share liability when necessary reductions exceeded the current value of the FDIC indemnification assets. In accordance with the clawback provision noted above, the Company was required to reimburse the FDIC when actual losses were less than certain thresholds established for each loss share agreement. The balance of these estimated reimbursements in accordance with clawback provisions and any related amortization were adjusted periodically for changes in the expected losses on covered assets. On the Consolidated Statements of Condition as of dates subject to loss share agreements, estimated reimbursements from clawback provisions were recorded as a reduction to the FDIC indemnification asset or, if necessary, an increase to the loss share liability, which was included within accrued interest payable and other liabilities. In the second quarter of 2017, the Company recorded a $4.9 million reduction to the estimated loss share liability as a result of an adjustment related to such clawback provisions. Although these assets were contractual receivables from the FDIC and these liabilities were contractual payables to the FDIC, there were no contractual interest rates. Additional expected losses, to the extent such expected losses resulted in recognition of an allowance for covered loan losses, increased the FDIC indemnification asset or reduced the FDIC indemnification liability. The corresponding amortization was recorded as a component of non-interest income on the Consolidated Statements of Income during periods covered by loss share agreements.

The following table summarizes the activity in the Company’s FDIC indemnification liability during the periods covered by loss share agreements indicated below:

	Three Months Ended			Nine Months Ended
(Dollars in thousands)	September 30, 2017			September 30, 2017
Balance at beginning of period	$	15,375		$	16,701
Reductions from reimbursable expenses	(159		)	(316		)
Amortization	311			1,010
Changes in expected reimbursements to the FDIC for changes in expected credit losses and reimbursable expenses	994			(1,665		)
Payments received from the FDIC	(1,049		)	(258		)
Balance at end of period	$	15,472		$	15,472

On October 16, 2017, the Company entered into agreements with the FDIC that terminated all existing loss share agreements with the FDIC. Under the terms of the agreements, the Company made a net payment of $15.2 million to the FDIC as consideration for the early termination of the loss share agreements. The Company recorded a pre-tax gain of approximately $0.4 million in the fourth quarter of 2017 to write off the remaining loss share asset, relieve the claw-back liability and recognize the payment to the FDIC.

Mortgage Banking Acquisitions

On January 4, 2018, the Company acquired Veterans First with assets including mortgage-servicing-rights on approximately 10,000 loans, totaling an estimated $1.6 billion in unpaid principal balance. The Company recorded goodwill of $9.1 million on the acquisition.

On February 14, 2017, the Company acquired certain assets and assumed certain liabilities of the mortgage banking business of American Homestead Mortgage, LLC ("AHM") in a business combination. The Company recorded goodwill of $999,000 on the acquisition.

Purchased Credit Impaired ("PCI") Loans

Purchased loans acquired in a business combination are recorded at estimated fair value on their purchase date. For PCI loans, expected future cash flows at the purchase date in excess of the fair value of loans are recorded as interest income over the life of the loans if the timing and amount of the future cash flows is reasonably estimable (“accretable yield”). The difference between contractually required payments and the cash flows expected to be collected at acquisition is referred to as the non-accretable difference and represents probable losses in the portfolio.

In determining the acquisition date fair value of PCI loans, and in subsequent accounting, the Company aggregates these purchased loans into pools of loans by common risk characteristics, such as credit risk rating and loan type. Subsequent to the purchase date, increases in cash flows over those expected at the purchase date are recognized as interest income prospectively. Subsequent decreases to the expected cash flows will result in a provision for loan losses.

The Company purchased a portfolio of life insurance premium finance receivables in 2009. These purchased life insurance premium finance receivables are valued on an individual basis. If credit related conditions deteriorate, an allowance related to these loans will be established as part of the provision for credit losses.

See Note 6—Loans, for additional information on PCI loans.

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Cash and Cash Equivalents

9 Months Ended

Sep. 30, 2018

Cash and Cash Equivalents [Abstract]

Cash and Cash Equivalents

Cash and Cash Equivalents

For purposes of the Consolidated Statements of Cash Flows, the Company considers cash and cash equivalents to include cash on hand, cash items in the process of collection, non-interest bearing amounts due from correspondent banks, federal funds sold and securities purchased under resale agreements with original maturities of three months or less. These items are included within the Company’s Consolidated Statements of Condition as cash and due from banks, and federal funds sold and securities purchased under resale agreements.

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Investment Securities

9 Months Ended

Sep. 30, 2018

Available-for-sale Securities and Held-to-maturity Securities [Abstract]

Investment Securities

Investment Securities

The following tables are a summary of the investment securities portfolios as of the dates shown:

	September 30, 2018
(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available-for-sale securities
U.S. Treasury	$	125,153	$	—	$	(392	)	$	124,761
U.S. Government agencies	111,997		8		(985		)	111,020
Municipal	133,006		1,481		(1,114		)	133,373
Corporate notes:
Financial issuers	97,085		87		(4,719		)	92,453
Other	1,000		—		—			1,000
Mortgage-backed: (1)
Mortgage-backed securities	1,744,600		121		(87,950		)	1,656,771
Collateralized mortgage obligations	47,909		4		(2,306		)	45,607
Equity securities (2)	—		—		—			—
Total available-for-sale securities	$	2,260,750	$	1,701	$	(97,466	)	$	2,164,985
Held-to-maturity securities
U.S. Government agencies	$	713,423	$	—	$	(47,706	)	$	665,717
Municipal	253,015		629		(7,764		)	245,880
Total held-to-maturity securities	$	966,438	$	629	$	(55,470	)	$	911,597
Equity securities with readily determinable fair value (2)	$	33,512	$	4,206	$	(1,304	)	$	36,414

	December 31, 2017
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
(Dollars in thousands)
Available-for-sale securities
U.S. Treasury	$	144,904	$	—	$	(1,082	)	$	143,822
U.S. Government agencies	157,638		2		(725		)	156,915
Municipal	113,197		2,712		(557		)	115,352
Corporate notes:
Financial issuers	30,309		43		(301		)	30,051
Other	1,000		—		(1		)	999
Mortgage-backed: (1)
Mortgage-backed securities	1,291,695		446		(31,955		)	1,260,186
Collateralized mortgage obligations	60,092		64		(617		)	59,539
Equity securities (2)	34,234		3,357		(789		)	36,802
Total available-for-sale securities	$	1,833,069	$	6,624	$	(36,027	)	$	1,803,666
Held-to-maturity securities
U.S. Government agencies	$	579,062	$	23	$	(14,066	)	$	565,019
Municipal	247,387		2,668		(2,558		)	247,497
Total held-to-maturity securities	$	826,449	$	2,691	$	(16,624	)	$	812,516

(1) Consisting entirely of residential mortgage-backed securities, none of which are subprime.

(2) As a result of the adoption of ASU No. 2016-01 effective January 1, 2018, equity securities with readily determinable fair value are no longer presented within available-for-sale securities and are now presented as equity securities with readily determinable fair values in the Company's Consolidated Statements of Condition for the current period.

	September 30, 2017
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
(Dollars in thousands)
Available-for-sale securities
U.S. Treasury	$	144,872	$	—	$	(727	)	$	144,145
U.S. Government agencies	159,884		10		(566		)	159,328
Municipal	113,796		2,493		(273		)	116,016
Corporate notes:
Financial issuers	60,325		63		(771		)	59,617
Other	1,000		—		(3		)	997
Mortgage-backed: (1)
Mortgage-backed securities	1,114,655		1,477		(30,436		)	1,085,696
Collateralized mortgage obligations	63,934		230		(412		)	63,752
Equity securities (2)	33,166		3,867		(681		)	36,352
Total available-for-sale securities	$	1,691,632	$	8,140	$	(33,869	)	$	1,665,903
Held-to-maturity securities
U.S. Government agencies	$	585,061	$	249	$	(12,579	)	$	572,731
Municipal	234,279		2,185		(2,159		)	234,305
Total held-to-maturity securities	$	819,340	$	2,434	$	(14,738	)	$	807,036

(1) Consisting entirely of residential mortgage-backed securities, none of which are subprime.

(2) As a result of the adoption of ASU No. 2016-01 effective January 1, 2018, equity securities with readily determinable fair value are no longer presented within available-for-sale securities and are now presented as equity securities with readily determinable fair values in the Company's Consolidated Statements of Condition for the current period.

Equity securities without readily determinable fair values totaled $26.6 million as of September 30, 2018. Equity securities without readily determinable fair values are included as part of accrued interest receivable and other assets in the Company's Consolidated Statements of Condition. The Company recorded no upward adjustments on such securities in the third quarter of 2018 and $156,000 on a year-to-date basis, related to observable price changes in orderly transactions for the identical or a similar investment of the same issuer in accordance with the adoption of ASU No. 2016-01. No downward adjustments of equity securities without readily determinable fair values related to observable price changes in orderly transactions for the identical or a similar investment of the same issuer were recorded during the current periods. The Company monitors its equity investments without a readily determinable fair values to identify potential transactions that may indicate an observable price change requiring adjustment to its carrying amount.

The following table presents the portion of the Company’s available-for-sale and held-to-maturity investment securities portfolios which has gross unrealized losses, reflecting the length of time that individual securities have been in a continuous unrealized loss position at September 30, 2018:

	Continuous unrealized losses existing for less than 12 months					Continuous unrealized losses existing for greater than 12 months					Total
(Dollars in thousands)	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Available-for-sale securities
U.S. Treasury	$	100,008	$	(131	)	$	24,753	$	(261	)	$	124,761	$	(392	)
U.S. Government agencies	37,672		(914		)	70,032		(71		)	107,704		(985		)
Municipal	38,774		(553		)	20,489		(561		)	59,263		(1,114		)
Corporate notes:
Financial issuers	68,639		(4,475		)	3,730		(244		)	72,369		(4,719		)
Other	—		—			—		—			—		—
Mortgage-backed:
Mortgage-backed securities	573,401		(14,706		)	1,079,068		(73,244		)	1,652,469		(87,950		)
Collateralized mortgage obligations	22,524		(1,228		)	22,671		(1,078		)	45,195		(2,306		)
Total available-for-sale securities	$	841,018	$	(22,007	)	$	1,220,743	$	(75,459	)	$	2,061,761	$	(97,466	)
Held-to-maturity securities
U.S. Government agencies	$	298,736	$	(12,317	)	$	366,981	$	(35,389	)	$	665,717	$	(47,706	)
Municipal	146,750		(3,854		)	83,874		(3,910		)	230,624		(7,764		)
Total held-to-maturity securities	$	445,486	$	(16,171	)	$	450,855	$	(39,299	)	$	896,341	$	(55,470	)

The Company conducts a regular assessment of its available-for-sale and held-to-maturity investment securities to determine whether securities are other-than-temporarily impaired considering, among other factors, the nature of the securities, credit ratings or financial condition of the issuer, the extent and duration of the unrealized loss, expected cash flows, market conditions and the Company’s ability to hold the securities through the anticipated recovery period.

The Company does not consider available-for-sale and held-to-maturity securities with unrealized losses at September 30, 2018 to be other-than-temporarily impaired. The Company does not intend to sell these investments and it is more likely than not that the Company will not be required to sell these investments before recovery of the amortized cost bases, which may be the maturity dates of the securities. The unrealized losses within each category have occurred as a result of changes in interest rates, market spreads and market conditions subsequent to purchase. Securities with continuous unrealized losses existing for more than twelve months were primarily mortgage-backed securities and corporate notes.

The following table provides information as to the amount of gross gains and losses, adjustments and impairment on investment securities and proceeds received through the sale or call of investment securities:

	Three months ended September 30,						Nine months ended September 30,
(Dollars in thousands)	2018			2017			2018			2017
Realized gains on investment securities	$	1,051		$	58		$	1,057		$	106
Realized losses on investment securities	(50		)	(19		)	(1,051		)	(75		)
Net realized gains on investment securities	1,001			$	39		6			$	31
Unrealized gains on equity securities with readily determinable fair value	530			—			2,632			—
Unrealized losses on equity securities with readily determinable fair value	(1,111		)	—			(2,176		)	—
Net unrealized (losses) gains on equity securities with readily determinable fair value	(581		)	—			456			—
Upward adjustments of equity securities without readily determinable fair values	—			—			156			—
Downward adjustments of equity securities without readily determinable fair values	—			—			—			—
Impairment of equity securities without readily determinable fair values	(330		)	—			(867		)	—
Adjustment and impairment, net, of equity securities without readily determinable fair values	(330		)	—			(711		)	—
Other than temporary impairment charges	—			—			—			—
Gains (losses) on investment securities, net	$	90		$	39		$	(249	)	$	31
Proceeds from sales of available-for-sale securities	$	649		$	133,089		$	209,640		$	121,795
Proceeds from sales of equity securities with readily determinable fair value	1,895			—			1,895			—
Proceeds from sales and capital distributions of equity securities without readily determinable fair value	64			—			680			—

During the three months ended September 30, 2018, the Company recorded $330,000 of impairment of equity securities without readily determinable fair values. On a year-to-date basis, the Company recorded impairment of equity securities without readily determinable fair values totaling $867,000. The Company conducts a quarterly assessment of its equity securities without a readily determinable fair values to determine whether impairment exists in such securities, considering, among other factors, the nature of the securities, financial condition of the issuer and expected future cash flows.

The amortized cost and fair value of available-for-sale and held-to-maturity investment securities as of September 30, 2018, December 31, 2017 and September 30, 2017, by contractual maturity, are shown in the following table. Contractual maturities may differ from actual maturities as borrowers may have the right to call or repay obligations with or without call or prepayment penalties. Mortgage-backed securities are not included in the maturity categories in the following maturity summary as actual maturities may differ from contractual maturities because the underlying mortgages may be called or prepaid without penalties:

	September 30, 2018				December 31, 2017				September 30, 2017
(Dollars in thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value		Amortized Cost		Fair Value
Available-for-sale securities
Due in one year or less	$	128,184	$	127,844	$	300,833	$	299,285	$	150,907	$	150,241
Due in one to five years	174,968		174,877		97,019		97,326		282,443		282,121
Due in five to ten years	118,229		113,875		33,947		35,029		38,339		39,458
Due after ten years	46,860		46,011		15,249		15,499		8,188		8,283
Mortgage-backed	1,792,509		1,702,378		1,351,787		1,319,725		1,178,589		1,149,448
Equity securities (1)	—		—		34,234		36,802		33,166		36,352
Total available-for-sale securities	$	2,260,750	$	2,164,985	$	1,833,069	$	1,803,666	$	1,691,632	$	1,665,903
Held-to-maturity securities
Due in one year or less	$	5,521	$	5,511	$	170	$	171	$	170	$	171
Due in one to five years	31,782		31,160		38,392		38,012		36,914		36,734
Due in five to ten years	255,146		243,608		205,227		203,680		193,387		192,581
Due after ten years	673,989		631,318		582,660		570,653		588,869		577,550
Total held-to-maturity securities	$	966,438	$	911,597	$	826,449	$	812,516	$	819,340	$	807,036

(1) As a result of the adoption of ASU No. 2016-01 effective January 1, 2018, equity securities with readily determinable fair value are no longer presented within available-for-sale securities and are now presented as equity securities with readily determinable fair values in the Company's Consolidated Statements of Condition for the current period.

Securities having a fair value of $1.7 billion at September 30, 2018 as well as securities having a fair value of $1.7 billion and $1.6 billion at December 31, 2017 and September 30, 2017, respectively, were pledged as collateral for public deposits, trust deposits, Federal Home Loan Bank ("FHLB") advances, securities sold under repurchase agreements and derivatives. At September 30, 2018, there were no securities of a single issuer, other than U.S. Government-sponsored agency securities, which exceeded 10% of shareholders’ equity.

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Loans

9 Months Ended

Sep. 30, 2018

Loans and Leases Receivable Disclosure [Abstract]

Loans

Loans

The following table shows the Company’s loan portfolio by category as of the dates shown:

	September 30,			December 31,			September 30,
(Dollars in thousands)	2018			2017			2017
Balance:
Commercial	$	7,473,958		$	6,787,677		$	6,456,034
Commercial real estate	6,746,774			6,580,618			6,400,781
Home equity	578,844			663,045			672,969
Residential real estate	924,250			832,120			789,499
Premium finance receivables—commercial	2,885,327			2,634,565			2,664,912
Premium finance receivables—life insurance	4,398,971			4,035,059			3,795,474
Consumer and other	115,827			107,713			133,112
Total loans, net of unearned income, excluding covered loans	$	23,123,951		$	21,640,797		$	20,912,781
Covered loans	—			—			46,601
Total loans	$	23,123,951		$	21,640,797		$	20,959,382
Mix:
Commercial	32		%	31		%	31		%
Commercial real estate	29			30			31
Home equity	3			3			3
Residential real estate	4			4			3
Premium finance receivables—commercial	12			12			13
Premium finance receivables—life insurance	19			19			18
Consumer and other	1			1			1
Total loans, net of unearned income, excluding covered loans	100		%	100		%	100		%
Covered loans	—			—			—
Total loans	100		%	100		%	100		%

The Company’s loan portfolio is generally comprised of loans to consumers and small to medium-sized businesses located within the geographic market areas that the banks serve. The premium finance receivables portfolios are made to customers throughout the United States and Canada. The Company strives to maintain a loan portfolio that is diverse in terms of loan type, industry, borrower and geographic concentrations. Such diversification reduces the exposure to economic downturns that may occur in different segments of the economy or in different industries.

Certain premium finance receivables are recorded net of unearned income. The unearned income portions of such premium finance receivables were $98.1 million at September 30, 2018, $87.0 million at December 31, 2017 and $80.4 million at September 30, 2017.

Total loans, excluding PCI loans, include net deferred loan fees and costs and fair value purchase accounting adjustments totaling $6.5 million at September 30, 2018, $9.3 million at December 31, 2017 and $8.0 million at September 30, 2017. PCI loans are recorded net of credit discounts. See “Acquired Loan Information at Acquisition - PCI Loans” below.

It is the policy of the Company to review each prospective credit in order to determine the appropriateness and, when required, the adequacy of security or collateral necessary to obtain when making a loan. The type of collateral, when required, will vary from liquid assets to real estate. The Company seeks to ensure access to collateral, in the event of default, through adherence to state lending laws and the Company’s credit monitoring procedures.

Acquired Loan Information at Acquisition—PCI Loans

As part of the Company's previous acquisitions, the Company acquired loans for which there was evidence of credit quality deterioration since origination (PCI loans) and determined that it was probable that the Company would be unable to collect all contractually required principal and interest payments. The following table presents the unpaid principal balance and carrying value for these acquired loans:

	September 30, 2018				December 31, 2017
(Dollars in thousands)	Unpaid Principal Balance		Carrying Value		Unpaid Principal Balance		Carrying Value
PCI loans	$	325,019	$	304,726	$	375,237	$	350,690

See Note 7—Allowance for Loan Losses, Allowance for Losses on Lending-Related Commitments and Impaired Loans for further discussion regarding the allowance for loan losses associated with PCI loans at September 30, 2018.

The following table provides estimated details as of the date of acquisition on loans acquired in 2018 with evidence of credit quality deterioration since origination:

(Dollars in thousands)	Delaware Place Bank
Contractually required payments including interest	$	13,367
Less: Nonaccretable difference	1,197
Cash flows expected to be collected (1)	$	12,170
Less: Accretable yield	2,321
Fair value of PCI loans acquired	$	9,849

(1) Represents undiscounted expected principal and interest cash at acquisition.

Accretable Yield Activity - PCI Loans

Changes in expected cash flows may vary from period to period as the Company periodically updates its cash flow model assumptions for PCI loans. The factors that most significantly affect the estimates of gross cash flows expected to be collected, and accordingly the accretable yield, include changes in the benchmark interest rate indices for variable-rate products and changes in prepayment assumptions and loss estimates. The following table provides activity for the accretable yield of PCI loans:

	Three Months Ended						Nine Months Ended
(Dollars in thousands)	September 30, 2018			September 30, 2017			September 30, 2018			September 30, 2017
Accretable yield, beginning balance	$	34,347		$	45,510		$	36,565		$	49,408
Acquisitions	2,321			—			2,321			426
Accretable yield amortized to interest income	(4,144		)	(5,025		)	(12,915		)	(16,101		)
Accretable yield amortized to indemnification asset/liability (1)	—			(371		)	—			(1,086		)
Reclassification from non-accretable difference (2)	1,734			1,017			4,596			7,106
Increases in interest cash flows due to payments and changes in interest rates	(1,093		)	(875		)	2,598			503
Accretable yield, ending balance	$	33,165		$	40,256		$	33,165		$	40,256

(1) Represents the portion of the current period accreted yield, resulting from lower expected losses, applied to reduce the loss share indemnification asset or increase the loss share indemnification liability.

(2) Reclassification is the result of subsequent increases in expected principal cash flows.

Accretion to interest income accounted for under ASC 310-30 totaled $4.1 million and $5.0 million in the third quarter of 2018 and 2017, respectively. For the nine months ended September 30, 2018 and 2017, the Company recorded accretion to interest income of $12.9 million and $16.1 million, respectively. These amounts are included within interest and fees on loans in the Consolidated Statements of Income.

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Allowance for Loan Losses, Allowance for Losses on Lending-Related Commitments and Impaired Loans

9 Months Ended

Sep. 30, 2018

Receivables [Abstract]

Allowance for Loan Losses, Allowance for Losses on Lending-Related Commitments and Impaired Loans

Allowance for Loan Losses, Allowance for Losses on Lending-Related Commitments and Impaired Loans

The tables below show the aging of the Company’s loan portfolio at September 30, 2018, December 31, 2017 and September 30, 2017:

As of September 30, 2018			90+ days and still accruing		60-89 days past due		30-59 days past due
(Dollars in thousands)	Nonaccrual								Current		Total Loans
Loan Balances:
Commercial
Commercial, industrial and other	$	41,322	$	—	$	2,535	$	16,451	$	4,745,178	$	4,805,486
Franchise	16,351		5,122		—		—		915,817		937,290
Mortgage warehouse lines of credit	—		—		3,000		—		168,860		171,860
Asset-based lending	910		—		590		9,083		1,023,268		1,033,851
Leases	4		—		—		80		509,591		509,675
PCI - commercial (1)	—		3,372		15		—		12,409		15,796
Total commercial	58,587		8,494		6,140		25,614		7,375,123		7,473,958
Commercial real estate:
Construction	1,554		—		1,823		16,228		778,725		798,330
Land	228		—		365		—		118,411		119,004
Office	1,532		—		4,058		3,021		932,166		940,777
Industrial	178		—		122		145		885,486		885,931
Retail	10,586		—		4,570		10,645		861,901		887,702
Multi-family	318		—		—		1,162		922,413		923,893
Mixed use and other	3,119		—		9,654		11,503		2,062,179		2,086,455
PCI - commercial real estate (1)	—		5,578		6,448		1,380		91,276		104,682
Total commercial real estate	17,515		5,578		27,040		44,084		6,652,557		6,746,774
Home equity	8,523		—		1,075		3,478		565,768		578,844
Residential real estate, including PCI	16,062		1,865		1,714		603		904,006		924,250
Premium finance receivables
Commercial insurance loans	13,802		7,028		5,945		13,239		2,845,313		2,885,327
Life insurance loans	—		—		—		22,016		4,203,465		4,225,481
PCI - life insurance loans (1)	—		—		—		—		173,490		173,490
Consumer and other, including PCI	355		295		430		329		114,418		115,827
Total loans, net of unearned income	$	114,844	$	23,260	$	42,344	$	109,363	$	22,834,140	$	23,123,951

As of December 31, 2017			90+ days and still accruing		60-89 days past due		30-59 days past due
(Dollars in thousands)	Nonaccrual								Current		Total Loans
Loan Balances:
Commercial
Commercial, industrial and other	$	11,260	$	—	$	3,746	$	13,392	$	4,314,107	$	4,342,505
Franchise	2,447		—		—		—		845,150		847,597
Mortgage warehouse lines of credit	—		—		—		4,000		190,523		194,523
Asset-based lending	1,550		—		283		10,057		968,576		980,466
Leases	439		—		3		1,958		410,772		413,172
PCI - commercial (1)	—		877		186		—		8,351		9,414
Total commercial	15,696		877		4,218		29,407		6,737,479		6,787,677
Commercial real estate
Construction	3,143		—		—		200		742,171		745,514
Land	188		—		—		5,156		121,140		126,484
Office	2,438		—		—		4,458		887,937		894,833
Industrial	811		—		—		2,412		879,796		883,019
Retail	12,328		—		668		148		938,383		951,527
Multi-family	—		—		—		1,034		914,610		915,644
Mixed use and other	3,140		—		1,423		9,641		1,921,501		1,935,705
PCI - commercial real estate (1)	—		7,135		2,255		6,277		112,225		127,892
Total commercial real estate	22,048		7,135		4,346		29,326		6,517,763		6,580,618
Home equity	8,978		—		518		4,634		648,915		663,045
Residential real estate, including PCI	17,977		5,304		1,303		8,378		799,158		832,120
Premium finance receivables
Commercial insurance loans	12,163		9,242		17,796		15,849		2,579,515		2,634,565
Life insurance loans	—		—		4,837		10,017		3,820,936		3,835,790
PCI - life insurance loans (1)	—		—		—		—		199,269		199,269
Consumer and other, including PCI	740		101		242		727		105,903		107,713
Total loans, net of unearned income	$	77,602	$	22,659	$	33,260	$	98,338	$	21,408,938	$	21,640,797

(1) PCI loans represent loans acquired with evidence of credit quality deterioration since origination, in accordance with ASC 310-30.Loan agings are based upon contractually required payments.

As of September 30, 2017			90+ days and still accruing		60-89 days past due		30-59 days past due
(Dollars in thousands)	Nonaccrual								Current		Total Loans
Loan Balances:
Commercial
Commercial, industrial and other	$	12,281	$	—	$	3,161	$	13,710	$	4,091,381	$	4,120,533
Franchise	—		—		—		16,719		836,997		853,716
Mortgage warehouse lines of credit	—		—		—		312		194,058		194,370
Asset-based lending	1,141		—		1,533		4,515		889,147		896,336
Leases	509		—		281		1,194		379,410		381,394
PCI - commercial (1)	—		1,489		61		—		8,135		9,685
Total commercial	13,931		1,489		5,036		36,450		6,399,128		6,456,034
Commercial real estate:
Construction	1,607		—		366		2,064		669,940		673,977
Land	196		—		—		—		102,557		102,753
Office	5,148		—		—		1,220		874,583		880,951
Industrial	1,848		—		137		438		834,062		836,485
Retail	2,200		—		3,030		3,674		925,335		934,239
Multi-family	569		—		68		3,058		861,290		864,985
Mixed use and other	3,310		—		843		3,561		1,966,601		1,974,315
PCI - commercial real estate (1)	—		8,443		1,394		2,940		120,299		133,076
Total commercial real estate	14,878		8,443		5,838		16,955		6,354,667		6,400,781
Home equity	7,581		—		446		2,590		662,352		672,969
Residential real estate, including PCI	14,743		1,120		2,055		165		771,416		789,499
Premium finance receivables
Commercial insurance loans	9,827		9,584		7,421		9,966		2,628,114		2,664,912
Life insurance loans	—		6,740		946		6,937		3,571,388		3,586,011
PCI - life insurance loans (1)	—		—		—		—		209,463		209,463
Consumer and other, including PCI	540		221		242		685		131,424		133,112
Total loans, net of unearned income, excluding covered loans	$	61,500	$	27,597	$	21,984	$	73,748	$	20,727,952	$	20,912,781
Covered loans	1,936		2,233		1,074		45		41,313		46,601
Total loans, net of unearned income	$	63,436	$	29,830	$	23,058	$	73,793	$	20,769,265	$	20,959,382

(1) PCI loans represent loans acquired with evidence of credit quality deterioration since origination, in accordance with ASC 310-30.Loan agings are based upon contractually required payments.

The Company's ability to manage credit risk depends in large part on our ability to properly identify and manage problem loans. To do so, the Company operates a credit risk rating system under which our credit management personnel assign a credit risk rating (1 to 10 rating) to each loan at the time of origination and review loans on a regular basis.

Each loan officer is responsible for monitoring his or her loan portfolio, recommending a credit risk rating for each loan in his or her portfolio and ensuring the credit risk ratings are appropriate. These credit risk ratings are then ratified by the bank’s chief credit officer and/or concurrence credit officer. Credit risk ratings are determined by evaluating a number of factors including: a borrower’s financial strength, cash flow coverage, collateral protection and guarantees.

The Company’s Problem Loan Reporting system automatically includes all loans with credit risk ratings of 6 through 9. This system is designed to provide an on-going detailed tracking mechanism for each problem loan. Once management determines that a loan has deteriorated to a point where it has a credit risk rating of 6 or worse, the Company’s Managed Asset Division performs an overall credit and collateral review. As part of this review, all underlying collateral is identified and the valuation methodology is analyzed and tracked. As a result of this initial review by the Company’s Managed Asset Division, the credit risk rating is reviewed and a portion of the outstanding loan balance may be deemed uncollectible or an impairment reserve may be established. The Company’s impairment analysis utilizes an independent re-appraisal of the collateral (unless such a third-party evaluation is not possible due to the unique nature of the collateral, such as a closely-held business or thinly traded securities). In the case of commercial real estate collateral, an independent third party appraisal is ordered by the Company’s Real Estate Services Group to determine if there has been any change in the underlying collateral value. These independent appraisals are reviewed by the Real Estate Services Group and sometimes by independent third party valuation experts and may be adjusted depending upon market conditions.

Through the credit risk rating process, loans are reviewed to determine if they are performing in accordance with the original contractual terms. If the borrower has failed to comply with the original contractual terms, further action may be required by the Company, including a downgrade in the credit risk rating, movement to non-accrual status, a charge-off or the establishment of a specific impairment reserve. If a loan amount, or portion thereof, is determined to be uncollectible, the loan’s credit risk rating is immediately downgraded to an 8 or 9 and the uncollectible amount is charged-off. Any loan that has a partial charge-off continues to be assigned a credit risk rating of an 8 or 9 for the duration of time that a balance remains outstanding. The Company undertakes a thorough and ongoing analysis to determine if additional impairment and/or charge-offs are appropriate and to begin a workout plan for the credit to minimize actual losses.

If, based on current information and events, it is probable that the Company will be unable to collect all amounts due to it according to the contractual terms of the loan agreement, a specific impairment reserve is established. In determining the appropriate charge-off for collateral-dependent loans, the Company considers the results of appraisals for the associated collateral.

Non-performing loans include all non-accrual loans (8 and 9 risk ratings) as well as loans 90 days past due and still accruing interest, excluding PCI and covered loans. The remainder of the portfolio is considered performing under the contractual terms of the loan agreement. The following table presents the recorded investment based on performance of loans by class, excluding covered loans, per the most recent analysis at September 30, 2018, December 31, 2017 and September 30, 2017:

	Performing						Non-performing						Total
(Dollars in thousands)	September 30, 2018		December 31, 2017		September 30, 2017		September 30, 2018		December 31, 2017		September 30, 2017		September 30, 2018		December 31, 2017		September 30, 2017
Loan Balances:
Commercial
Commercial, industrial and other	$	4,764,164	$	4,331,245	$	4,108,252	$	41,322	$	11,260	$	12,281	$	4,805,486	$	4,342,505	$	4,120,533
Franchise	915,817		845,150		853,716		21,473		2,447		—		937,290		847,597		853,716
Mortgage warehouse lines of credit	171,860		194,523		194,370		—		—		—		171,860		194,523		194,370
Asset-based lending	1,032,941		978,916		895,195		910		1,550		1,141		1,033,851		980,466		896,336
Leases	509,671		412,733		380,885		4		439		509		509,675		413,172		381,394
PCI - commercial (1)	15,796		9,414		9,685		—		—		—		15,796		9,414		9,685
Total commercial	7,410,249		6,771,981		6,442,103		63,709		15,696		13,931		7,473,958		6,787,677		6,456,034
Commercial real estate
Construction	796,776		742,371		672,370		1,554		3,143		1,607		798,330		745,514		673,977
Land	118,776		126,296		102,557		228		188		196		119,004		126,484		102,753
Office	939,245		892,395		875,803		1,532		2,438		5,148		940,777		894,833		880,951
Industrial	885,753		882,208		834,637		178		811		1,848		885,931		883,019		836,485
Retail	877,116		939,199		932,039		10,586		12,328		2,200		887,702		951,527		934,239
Multi-family	923,575		915,644		864,416		318		—		569		923,893		915,644		864,985
Mixed use and other	2,083,336		1,932,565		1,971,005		3,119		3,140		3,310		2,086,455		1,935,705		1,974,315
PCI - commercial real estate(1)	104,682		127,892		133,076		—		—		—		104,682		127,892		133,076
Total commercial real estate	6,729,259		6,558,570		6,385,903		17,515		22,048		14,878		6,746,774		6,580,618		6,400,781
Home equity	570,321		654,067		665,388		8,523		8,978		7,581		578,844		663,045		672,969
Residential real estate, including PCI	908,188		810,865		774,756		16,062		21,255		14,743		924,250		832,120		789,499
Premium finance receivables
Commercial insurance loans	2,864,497		2,613,160		2,645,501		20,830		21,405		19,411		2,885,327		2,634,565		2,664,912
Life insurance loans	4,225,481		3,835,790		3,579,271		—		—		6,740		4,225,481		3,835,790		3,586,011
PCI - life insurance loans (1)	173,490		199,269		209,463		—		—		—		173,490		199,269		209,463
Consumer and other, including PCI	115,239		106,933		132,413		588		780		699		115,827		107,713		133,112
Total loans, net of unearned income, excluding covered loans	$	22,996,724	$	21,550,635	$	20,834,798	$	127,227	$	90,162	$	77,983	$	23,123,951	$	21,640,797	$	20,912,781

(1) PCI loans represent loans acquired with evidence of credit quality deterioration since origination, in accordance with ASC 310-30. See Note 6 - Loans for further discussion of these purchased loans.

A summary of activity in the allowance for credit losses by loan portfolio (excluding covered loans) for the nine months endedSeptember 30, 2018 and 2017 is as follows:

Three months ended September 30, 2018				Commercial Real Estate			Home  Equity			Residential Real Estate			Premium Finance Receivables			Consumer and Other			Total, Excluding Covered Loans
(Dollars in thousands)	Commercial
Allowance for credit losses
Allowance for loan losses at beginning of period	$	60,727		$	57,660		$	9,551		$	6,336		$	7,734		$	1,394		$	143,402
Other adjustments	(1		)	(15		)	(2		)	(14		)	14			—			(18		)
Reclassification from allowance for unfunded lending-related commitments	—			(2		)	—			—			—			—			(2		)
Charge-offs	(3,219		)	(208		)	(561		)	(337		)	(2,512		)	(144		)	(6,981		)
Recoveries	304			193			142			466			1,142			66			2,313
Provision for credit losses	8,934			619			13			(160		)	1,796			(160		)	11,042
Allowance for loan losses at period end	$	66,745		$	58,247		$	9,143		$	6,291		$	8,174		$	1,156		$	149,756
Allowance for unfunded lending-related commitments at period end	$	—		$	1,245		$	—		$	—		$	—		$	—		$	1,245
Allowance for credit losses at period end	$	66,745		$	59,492		$	9,143		$	6,291		$	8,174		$	1,156		$	151,001
Individually evaluated for impairment	$	10,164		$	3,158		$	611		$	325		$	—		$	117		$	14,375
Collectively evaluated for impairment	55,987			56,316			8,532			5,894			8,174			1,039			135,942
Loans acquired with deteriorated credit quality	594			18			—			72			—			—			684
Loans at period end
Individually evaluated for impairment	$	67,381		$	31,952		$	11,284		$	21,781		$	—		$	401		$	132,799
Collectively evaluated for impairment	7,390,781			6,610,140			567,560			815,442			7,110,808			113,812			22,608,543
Loans acquired with deteriorated credit quality	15,796			104,682			—			9,144			173,490			1,614			304,726
Loans held at fair value	—			—			—			77,883			—			—			77,883

Three months ended September 30, 2017	Commercial			Commercial Real Estate			Home  Equity			Residential Real Estate			Premium Finance Receivables			Consumer and Other			Total, Excluding Covered Loans
(Dollars in thousands)
Allowance for credit losses
Allowance for loan losses at beginning of period	$	52,358		$	52,339		$	11,134		$	6,143		$	6,352		$	1,265		$	129,591
Other adjustments	(2		)	(38		)	—			(31		)	32			—			(39		)
Reclassification from allowance for unfunded lending-related commitments	500			(406		)	—			—			—			—			94
Charge-offs	(2,265		)	(989		)	(968		)	(267		)	(1,716		)	(213		)	(6,418		)
Recoveries	801			323			178			55			499			93			1,949
Provision for credit losses	4,343			811			212			757			1,386			433			7,942
Allowance for loan losses at period end	$	55,735		$	52,040		$	10,556		$	6,657		$	6,553		$	1,578		$	133,119
Allowance for unfunded lending-related commitments at period end	$	—		$	1,276		$	—		$	—		$	—		$	—		$	1,276
Allowance for credit losses at period end	$	55,735		$	53,316		$	10,556		$	6,657		$	6,553		$	1,578		$	134,395
Individually evaluated for impairment	$	4,568		$	1,184		$	691		$	758		$	—		$	34		$	7,235
Collectively evaluated for impairment	50,623			52,048			9,865			5,813			6,553			1,544			126,446
Loans acquired with deteriorated credit quality	544			84			—			86			—			—			714
Loans at period end
Individually evaluated for impairment	$	18,086		$	31,698		$	7,729		$	21,263		$	—		$	544		$	79,320
Collectively evaluated for impairment	6,428,263			6,236,007			665,240			735,185			6,250,923			13,581			20,447,199
Loans acquired with deteriorated credit quality	9,685			133,076			—			3,637			209,463			987			356,848
Loans held at fair value	—			—			—			29,414			—			—			29,414

Nine months ended September 30, 2018				Commercial Real Estate			Home  Equity			Residential Real Estate			Premium Finance Receivable			Consumer and Other			Total, Excluding Covered Loans
(Dollars in thousands)	Commercial
Allowance for credit losses
Allowance for loan losses at beginning of period	$	57,811		$	55,227		$	10,493		$	6,688		$	6,846		$	840		$	137,905
Other adjustments	(3		)	(66		)	(2		)	(19		)	(12		)	—			(102		)
Reclassification from allowance for unfunded lending-related commitments	—			24			—			—			—			—			24
Charge-offs	(8,116		)	(1,176		)	(1,530		)	(1,088		)	(10,487		)	(732		)	(23,129		)
Recoveries	1,232			4,267			436			2,028			2,502			162			10,627
Provision for credit losses	15,821			(29		)	(254		)	(1,318		)	9,325			886			24,431
Allowance for loan losses at period end	$	66,745		$	58,247		$	9,143		$	6,291		$	8,174		$	1,156		$	149,756
Allowance for unfunded lending-related commitments at period end	$	—		$	1,245		$	—		$	—		$	—		$	—		$	1,245
Allowance for credit losses at period end	$	66,745		$	59,492		$	9,143		$	6,291		$	8,174		$	1,156		$	151,001

Nine months ended September 30, 2017				Commercial Real Estate			Home  Equity			Residential Real Estate			Premium Finance Receivable			Consumer and Other			Total, Excluding Covered Loans
(Dollars in thousands)	Commercial
Allowance for credit losses
Allowance for loan losses at beginning of period	$	44,493		$	51,422		$	11,774		$	5,714		$	7,625		$	1,263		$	122,291
Other adjustments	(23		)	(121		)	—			(38		)	57			—			(125		)
Reclassification from allowance for unfunded lending-related commitments	500			(438		)	—			—			—			—			62
Charge-offs	(3,819		)	(3,235		)	(3,224		)	(742		)	(5,021		)	(522		)	(16,563		)
Recoveries	1,635			1,153			387			287			1,515			267			5,244
Provision for credit losses	12,949			3,259			1,619			1,436			2,377			570			22,210
Allowance for loan losses at period end	$	55,735		$	52,040		$	10,556		$	6,657		$	6,553		$	1,578		$	133,119
Allowance for unfunded lending-related commitments at period end	$	—		$	1,276		$	—		$	—		$	—		$	—		$	1,276
Allowance for credit losses at period end	$	55,735		$	53,316		$	10,556		$	6,657		$	6,553		$	1,578		$	134,395

A summary of activity in the allowance for covered loan losses for the three and nine months endedSeptember 30, 2017 is as follows:

	Three Months Ended			Nine Months Ended
	September 30,			September 30,
(Dollars in thousands)	2017			2017
Balance at beginning of period	$	1,074		$	1,322
Provision for covered loan losses before benefit attributable to FDIC loss share agreements	(225		)	(1,063		)
Benefit attributable to FDIC loss share agreements	180			850
Net provision for covered loan losses	(45		)	(213		)
Increase in FDIC indemnification liability	(180		)	(850		)
Loans charged-off	(155		)	(491		)
Recoveries of loans charged-off	64			990
Net (charge-offs) recoveries	(91		)	499
Balance at end of period	$	758		$	758

In conjunction with FDIC-assisted transactions, the Company entered into loss share agreements with the FDIC. Additional expected losses, to the extent such expected losses resulted in the recognition of an allowance for loan losses, increased the FDIC loss share asset or reduced any FDIC loss share liability. The allowance for loan losses for loans acquired in FDIC-assisted transactions was determined without giving consideration to the amounts recoverable through loss share agreements (since the loss share agreements were separately accounted for and thus presented “gross” on the balance sheet). On the Consolidated Statements of Income, the provision for credit losses was reported net of changes in the amount recoverable under the loss share agreements. Reductions to expected losses, to the extent such reductions to expected losses were the result of an improvement to the actual or expected cash flows from the covered assets, reduced the FDIC loss share asset or increased any FDIC loss share liability. Additions to expected losses required an increase to the allowance for covered loan losses, and a corresponding increase to the FDIC loss share asset or reduction to any FDIC loss share liability. See “FDIC-Assisted Transactions” within Note 3 – Business Combinations for more detail.

On October 16, 2017, the Company entered into agreements with the FDIC that terminated all existing loss share agreements with the FDIC. As a result, the allowance for covered loan losses previously measured is included within the allowance for credit losses, excluding covered loans, presented above for subsequent periods. See Note 3 - Business Combinations for further discussion of the termination of FDIC loss share agreements.

Impaired Loans

A summary of impaired loans, including troubled debt restructurings ("TDRs"), is as follows:

	September 30,		December 31,		September 30,
(Dollars in thousands)	2018		2017		2017
Impaired loans (included in non-performing and TDRs):
Impaired loans with an allowance for loan loss required (1)	$	83,349	$	36,084	$	30,864
Impaired loans with no allowance for loan loss required	49,173		69,004		47,730
Total impaired loans (2)	$	132,522	$	105,088	$	78,594
Allowance for loan losses related to impaired loans	$	14,365	$	8,023	$	7,218
TDRs	$	66,219	$	49,786	$	33,183

(1) These impaired loans require an allowance for loan losses because the estimated fair value of the loans or related collateral is less than the recorded investment in the loans.

(2) Impaired loans are considered by the Company to be non-accrual loans, TDRs or loans with principal and/or interest at risk, even if theloan is current with all payments of principal and interest.

The following tables present impaired loans by loan class, excluding covered loans, for the periods ended as follows:

							For the Nine Months Ended
	As of September 30, 2018						September 30, 2018
	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average  Recorded Investment		Interest Income Recognized
(Dollars in thousands)
Impaired loans with a related ASC 310 allowance recorded
Commercial
Commercial, industrial and other	$	36,564	$	36,699	$	8,242	$	30,259	$	1,404
Franchise	16,316		18,504		1,638		18,387		771
Asset-based lending	646		646		283		724		39
Leases	1,777		1,777		1		1,836		69
Commercial real estate
Construction	1,554		1,554		390		1,554		56
Land	1,375		1,375		1		1,508		53
Office	579		647		26		591		19
Industrial	45		154		1		56		6
Retail	15,325		15,567		2,413		15,376		535
Multi-family	1,197		1,197		8		1,209		32
Mixed use and other	1,590		1,801		309		1,754		76
Home equity	2,287		2,651		611		2,303		78
Residential real estate	3,977		4,291		325		3,998		128
Consumer and other	117		130		117		119		5
Impaired loans with no related ASC 310 allowance recorded
Commercial
Commercial, industrial and other	$	5,758	$	7,022	$	—	$	9,325	$	465
Franchise	5,157		5,158		—		5,376		302
Asset-based lending	264		1,088		—		1,623		89
Leases	899		930		—		974		43
Commercial real estate
Construction	1,117		1,117		—		1,252		40
Land	2,325		2,431		—		2,366		98
Office	1,532		2,077		—		1,541		86
Industrial	178		195		—		188		9
Retail	777		946		—		874		42
Multi-family	318		412		—		329		9
Mixed use and other	3,763		4,362		—		3,950		194
Home equity	8,997		12,131		—		9,015		462
Residential real estate	17,804		20,291		—		18,193		643
Consumer and other	284		408		—		295		15
Total impaired loans, net of unearned income	$	132,522	$	145,561	$	14,365	$	134,975	$	5,768

							For the Twelve Months Ended
	As of December 31, 2017						December 31, 2017
	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average  Recorded Investment		Interest Income Recognized
(Dollars in thousands)
Impaired loans with a related ASC 310 allowance recorded
Commercial
Commercial, industrial and other	$	6,233	$	7,323	$	3,951	$	7,220	$	452
Franchise	—		—		—		—		—
Asset-based lending	948		949		355		1,302		72
Leases	2,331		2,337		158		2,463		117
Commercial real estate
Construction	3,097		3,897		403		3,690		197
Land	—		—		—		—		—
Office	471		471		5		481		24
Industrial	408		408		40		414		25
Retail	15,599		15,657		1,336		15,736		624
Multi-family	—		—		—		—		—
Mixed use and other	1,567		1,586		379		1,599		77
Home equity	1,606		1,869		784		1,626		81
Residential real estate	3,798		3,910		586		3,790		146
Consumer and other	26		28		26		27		2
Impaired loans with no related ASC 310 allowance recorded
Commercial
Commercial, industrial and other	$	8,460	$	12,259	$	—	$	10,170	$	683
Franchise	16,256		16,256		—		17,089		780
Asset-based lending	602		602		—		688		40
Leases	782		782		—		845		49
Commercial real estate
Construction	1,367		1,678		—		1,555		84
Land	3,961		4,192		—		4,129		182
Office	2,438		6,140		—		3,484		330
Industrial	403		2,010		—		1,849		174
Retail	2,393		3,538		—		2,486		221
Multi-family	1,231		2,078		—		1,246		76
Mixed use and other	5,275		6,731		—		5,559		351
Home equity	7,648		11,648		—		9,114		603
Residential real estate	17,455		20,327		—		17,926		860
Consumer and other	733		890		—		773		48
Total impaired loans, net of unearned income	$	105,088	$	127,566	$	8,023	$	115,261	$	6,298

							For the Nine Months Ended
	As of September 30, 2017						September 30, 2017
	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average  Recorded Investment		Interest Income Recognized
(Dollars in thousands)
Impaired loans with a related ASC 310 allowance recorded
Commercial
Commercial, industrial and other	$	7,312	$	8,458	$	4,191	$	8,390	$	407
Franchise	—		—		—		—		—
Asset-based lending	588		589		161		588		21
Leases	2,440		2,444		215		2,539		91
Commercial real estate
Construction	1,607		2,408		94		2,319		93
Land	—		—		—		—		—
Office	2,225		2,291		570		2,280		94
Industrial	408		408		75		415		19
Retail	5,932		6,072		158		5,998		191
Multi-family	1,239		1,239		8		1,250		33
Mixed use and other	1,537		1,695		263		1,580		60
Home equity	1,511		1,721		691		1,528		53
Residential real estate	5,842		6,154		758		5,842		177
Consumer and other	223		224		34		225		10
Impaired loans with no related ASC 310 allowance recorded
Commercial
Commercial, industrial and other	$	5,995	$	7,260	$	—	$	6,662	$	294
Franchise	—		—		—		—		—
Asset-based lending	553		553		—		728		31
Leases	817		817		—		862		38
Commercial real estate
Construction	1,504		1,504		—		1,524		49
Land	3,968		4,217		—		4,110		136
Office	3,400		3,585		—		3,565		147
Industrial	1,440		2,729		—		2,885		183
Retail	1,978		1,988		—		2,008		103
Multi-family	569		653		—		571		23
Mixed use and other	5,546		6,267		—		5,745		241
Home equity	6,218		9,523		—		7,231		339
Residential real estate	15,421		17,859		—		15,726		575
Consumer and other	321		433		—		334		16
Total impaired loans, net of unearned income	$	78,594	$	91,091	$	7,218	$	84,905	$	3,424

TDRs

At September 30, 2018, the Company had $66.2 million in loans modified in TDRs. The $66.2 million in TDRs represents 111 credits in which economic concessions were granted to certain borrowers to better align the terms of their loans with their current ability to pay.

The Company’s approach to restructuring loans, excluding PCI loans, is built on its credit risk rating system which requires credit management personnel to assign a credit risk rating to each loan. In each case, the loan officer is responsible for recommending a credit risk rating for each loan and ensuring the credit risk ratings are appropriate. These credit risk ratings are then reviewed and approved by the bank’s chief credit officer and/or concurrence credit officer. Credit risk ratings are determined by evaluating a number of factors including a borrower’s financial strength, cash flow coverage, collateral protection and guarantees. The Company’s credit risk rating scale is one through ten with higher scores indicating higher risk. In the case of loans rated six or worse following modification, the Company’s Managed Assets Division evaluates the loan and the credit risk rating and determines that the loan has been restructured to be reasonably assured of repayment and of performance according to the modified terms and is supported by a current, well-documented credit assessment of the borrower’s financial condition and prospects for repayment under the revised terms.

A modification of a loan, excluding PCI loans, with an existing credit risk rating of 6 or worse or a modification of any other credit, which will result in a restructured credit risk rating of six or worse, must be reviewed for possible TDR classification. In that event, our Managed Assets Division conducts an overall credit and collateral review. A modification of these loans is considered to be a TDR if both (1) the borrower is experiencing financial difficulty and (2) for economic or legal reasons, the bank grants a concession to a borrower that it would not otherwise consider. The modification of a loan, excluding PCI loans, where the credit risk rating is 5 or better both before and after such modification is not considered to be a TDR. Based on the Company’s credit risk rating system, it considers that borrowers whose credit risk rating is 5 or better are not experiencing financial difficulties and therefore, are not considered TDRs.

All credits determined to be a TDR will continue to be classified as a TDR in all subsequent periods, unless the borrower has been in compliance with the loan’s modified terms for a period of six months (including over a calendar year-end) and the current interest rate represents a market rate at the time of restructuring. The Managed Assets Division, in consultation with the respective loan officer, determines whether the modified interest rate represented a current market rate at the time of restructuring. Using knowledge of current market conditions and rates, competitive pricing on recent loan originations, and an assessment of various characteristics of the modified loan (including collateral position and payment history), an appropriate market rate for a new borrower with similar risk is determined. If the modified interest rate meets or exceeds this market rate for a new borrower with similar risk, the modified interest rate represents a market rate at the time of restructuring. Additionally, before removing a loan from TDR classification, a review of the current or previously measured impairment on the loan and any concerns related to future performance by the borrower is conducted. If concerns exist about the future ability of the borrower to meet its obligations under the loans based on a credit review by the Managed Assets Division, the TDR classification is not removed from the loan.

TDRs are reviewed at the time of the modification and on a quarterly basis to determine if a specific reserve is necessary. The carrying amount of the loan is compared to the expected payments to be received, discounted at the loan's original rate, or for collateral dependent loans, to the fair value of the collateral. Any shortfall is recorded as a specific reserve. The Company, in accordance with ASC 310-10, continues to individually measure impairment of these loans after the TDR classification is removed.

Each TDR was reviewed for impairment at September 30, 2018 and approximately $3.9 million of impairment was present and appropriately reserved for through the Company’s normal reserving methodology in the Company’s allowance for loan losses. For TDRs in which impairment is calculated by the present value of future cash flows, the Company records interest income representing the decrease in impairment resulting from the passage of time during the respective period, which differs from interest income from contractually required interest on these specific loans.  During the three months ended September 30, 2018 and 2017, the Company recorded $32,000 and $68,000, respectively, of interest income, which was reflected as a decrease in impairment. For the nine months endedSeptember 30, 2018 and 2017, the Company recorded $89,000 and $172,000, respectively, of interest income, which was reflected as a decrease in impairment.

TDRs may arise when, due to financial difficulties experienced by the borrower, the Company obtains through physical possession one or more collateral assets in satisfaction of all or part of an existing credit. Once possession is obtained, the Company reclassifies the appropriate portion of the remaining balance of the credit from loans to OREO, which is included within other assets in the Consolidated Statements of Condition. For any residential real estate property collateralizing a consumer mortgage loan, the Company is considered to possess the related collateral only if legal title is obtained upon completion of foreclosure, or the borrower conveys all interest in the residential real estate property to the Company through completion of a deed in lieu of foreclosure or similar legal agreement. At September 30, 2018, the Company had $5.7 million of foreclosed residential real estate properties included within OREO. Furthermore, the recorded investment in residential mortgage loans secured by residential real estate properties for which foreclosure proceedings are in process totaled $14.2 million and $12.1 million at September 30, 2018 and 2017, respectively.

The tables below present a summary of the post-modification balance of loans restructured during the three and nine months endedSeptember 30, 2018 and 2017, respectively, which represent TDRs:

Three months ended September 30, 2018 (Dollars in thousands)	Total (1)(2)			Extension at Below Market Terms (2)			Reduction of Interest Rate (2)			Modification to  Interest-only Payments (2)			Forgiveness of Debt(2)
	Count	Balance		Count	Balance		Count	Balance		Count	Balance		Count	Balance
Commercial
Commercial, industrial and other	1	$	519	1	$	519	—	$	—	—	$	—	—	$	—
Franchise	1	35		1	35		—	—		—	—		—	—
Leases	—	—		—	—		—	—		—	—		—	—
Commercial real estate
Office	—	—		—	—		—	—		—	—		—	—
Mixed use and other	—	—		—	—		—	—		—	—		—	—
Residential real estate and other	20	3,679		20	3,679		7	621		—	—		—	—
Total loans	22	$	4,233	22	$	4,233	7	$	621	—	$	—	—	$	—

(1) TDRs may have more than one modification representing a concession. As such, TDRs during the period may be represented in more than one of the categories noted above.

(2) Balances represent the recorded investment in the loan at the time of the restructuring.

Three months ended September 30, 2017 (Dollars in thousands)	Total (1)(2)			Extension at Below Market Terms (2)			Reduction of Interest Rate (2)			Modification to  Interest-only Payments (2)			Forgiveness of Debt(2)
	Count	Balance		Count	Balance		Count	Balance		Count	Balance		Count	Balance
Commercial
Commercial, industrial and other	3	$	1,408	—	$	—	—	$	—	3	$	1,408	—	$	—
Franchise	—	—		—	—		—	—		—	—		—	—
Leases	—	—		—	—		—	—		—	—		—	—
Commercial real estate
Office	—	—		—	—		—	—		—	—		—	—
Mixed use and other	—	—		—	—		—	—		—	—		—	—
Residential real estate and other	2	255		1	186		2	255		—	—		1	69
Total loans	5	$	1,663	1	$	186	2	$	255	3	$	1,408	1	$	69

(1) TDRs may have more than one modification representing a concession. As such, TDRs during the period may be represented in more than one of the categories noted above.

(2) Balances represent the recorded investment in the loan at the time of the restructuring.

During the three months ended September 30, 2018, 22 loans totaling $4.2 million were determined to be TDRs, compared to five loans totaling $1.7 million during the three months ended September 30, 2017. Of these loans extended at below market terms, the weighted average extension had a term of approximately 72 months during the quarter ended September 30, 2018 compared to 36 months for the quarter ended September 30, 2017. Further, the weighted average decrease in the stated interest rate for loans with a reduction of interest rate during the period was approximately 140 basis points and 225 basis points during the three months ended September 30, 2018 and 2017, respectively. Interest-only payment terms were approximately two months during the three months ended September 30, 2017. Additionally, no principal balances were forgiven in the third quarter of 2018 compared to $73,000 of principal balances forgiven in the third quarter of 2017.

Nine months ended September 30, 2018 (Dollars in thousands)	Total (1)(2)			Extension at Below Market Terms (2)			Reduction of Interest Rate (2)			Modification to  Interest-only Payments (2)			Forgiveness of Debt(2)
	Count	Balance		Count	Balance		Count	Balance		Count	Balance		Count	Balance
Commercial
Commercial, industrial and other	4	$	13,442	3	$	692	—	$	—	1	$	12,750	—	$	—
Franchise	3	5,157		1	35		—	—		2	5,122		—	—
Leases	1	239		1	239		—	—		—	—		—	—
Commercial real estate
Office	1	59		1	59		—	—		—	—		—	—
Mixed use and other	1	85		1	85		1	85		—	—		—	—
Residential real estate and other	31	5,846		31	5,846		12	1,417		—	—		—	—
Total loans	41	$	24,828	38	$	6,956	13	$	1,502	3	$	17,872	—	$	—

Nine months ended September 30, 2017 (Dollars in thousands)	Total (1)(2)			Extension at Below Market Terms (2)			Reduction of Interest Rate (2)			Modification to  Interest-only Payments (2)			Forgiveness of Debt(2)
	Count	Balance		Count	Balance		Count	Balance		Count	Balance		Count	Balance
Commercial
Commercial, industrial and other	4	$	1,503	1	$	95	—	$	—	3	$	1,408	—	$	—
Franchise	—	—		—	—		—	—		—	—		—	—
Leases	—	—		—	—		—	—		—	—		—	—
Commercial real estate
Office	—	—		—	—		—	—		—	—		—	—
Mixed use and other	1	1,245		1	1,245		—	—		—	—		—	—
Residential real estate and other	8	2,638		7	2,569		7	2,589		—	—		1	69
Total loans	13	$	5,386	9	$	3,909	7	$	2,589	3	$	1,408	1	$	69

(1) TDRs may have more than one modification representing a concession. As such, TDRs during the period may be represented in more than one of the categories noted above.

(2) Balances represent the recorded investment in the loan at the time of the restructuring.

During the nine months ended September 30, 2018, 41 loans totaling $24.8 million were determined to be TDRs, compared to 13 loans totaling $5.4 million in the same period of 2017. Of these loans extended at below market terms, the weighted average extension had a term of approximately 64 months during the nine months ended September 30, 2018 compared to 36 months for the nine months ended September 30, 2017. Further, the weighted average decrease in the stated interest rate for loans with a reduction of interest rate during the period was approximately 160 basis points and 188 basis points for the year-to-date periods September 30, 2018 and 2017, respectively. Interest-only payment terms were approximately seven months during the nine months ended September 30, 2018 compared to two months during the same period of 2017. Additionally, no principal balances were forgiven in the first nine months of 2018 compared to $73,000 of principal balances forgiven in the first nine months of 2017.

The following table presents a summary of all loans restructured in TDRs during the twelve months ended September 30, 2018 and 2017, and such loans which were in payment default under the restructured terms during the respective periods below:

(Dollars in thousands)	As of September 30, 2018			Three Months Ended September 30, 2018			Nine Months Ended September 30, 2018
	Total (1)(3)			Payments in Default  (2)(3)			Payments in Default  (2)(3)
	Count	Balance		Count	Balance		Count	Balance
Commercial
Commercial, industrial and other	5	$	15,714	3	$	2,447	3	$	2,447
Franchise	6	21,413		2	5,122		2	5,122
Leases	1	239		—	—		—	—
Commercial real estate
Office	1	59		—	—		—	—
Industrial	—	—		—	—		—	—
Mixed use and other	1	85		1	85		1	85
Residential real estate and other	35	6,257		7	1,457		7	1,457
Total loans	49	$	43,767	13	$	9,111	13	$	9,111

(Dollars in thousands)	As of September 30, 2017			Three Months Ended September 30, 2017			Nine Months Ended September 30, 2017
	Total (1)(3)			Payments in Default  (2)(3)			Payments in Default  (2)(3)
	Count	Balance		Count	Balance		Count	Balance
Commercial
Commercial, industrial and other	4	$	1,503	—	$	—	—	$	—
Franchise	—	—		—	—		—	—
Leases	2	2,949		—	—		—	—
Commercial real estate
Office	—	—		—	—		—	—
Mixed use and other	1	1,245		1	1,245		1	1,245
Residential real estate and other	12	3,137		1	52		2	284
Total loans	19	$	8,834	2	$	1,297	3	$	1,529

(1) Total TDRs represent all loans restructured in TDRs during the previous twelve months from the date indicated.

(2) TDRs considered to be in payment default are over 30 days past-due subsequent to the restructuring.

(3) Balances represent the recorded investment in the loan at the time of the restructuring.

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Goodwill and Other Intangible Assets

9 Months Ended

Sep. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets

Goodwill and Other Intangible Assets

A summary of the Company’s goodwill assets by business segment is presented in the following table:

(Dollars in thousands)	January 1, 2018		Goodwill Acquired		Impairment Loss		Goodwill Adjustments			September 30, 2018
Community banking	$	429,520	$	36,307	$	—	$	—		$	465,827
Specialty finance	40,250		—		—		(631		)	39,619
Wealth management	32,114		—		—		—			32,114
Total	$	501,884	$	36,307	$	—	$	(631	)	$	537,560

The community banking segment's goodwill increased $36.3 million in the first nine months of 2018 primarily as a result of the acquisition of CSC and Veterans First. The specialty finance segment's goodwill decreased $631,000 in the first nine months of 2018 as a result of foreign currency translation adjustments related to the Canadian acquisitions.

At June 30, 2018, the Company utilized a qualitative approach for its annual goodwill impairment test of the community banking segment and determined that it is not more likely than not that an impairment existed at that time. At December 31, 2017, the Company utilized a quantitative approach for its annual goodwill impairment tests of the specialty finance and wealth management segments and determined that no impairment existed at that time. At each reporting date between annual goodwill impairment tests, the Company considers potential indicators of impairment. As of September 30, 2018, the Company identified no such indicators of goodwill impairment within the community banking, specialty finance and wealth management segments.

A summary of intangible assets as of the dates shown and the expected amortization of finite-lived intangible assets as of September 30, 2018 is as follows:

(Dollars in thousands)	September 30, 2018			December 31, 2017			September 30, 2017
Community banking segment:
Core deposit intangibles with finite lives:
Gross carrying amount	$	44,395		$	37,272		$	37,272
Accumulated amortization	(28,142		)	(25,427		)	(24,550		)
Net carrying amount	$	16,253		$	11,845		$	12,722
Trademark with indefinite lives:
Carrying amount	5,800			—			—
Total net carrying amount	$	22,053		$	11,845		$	12,722
Specialty finance segment:
Customer list intangibles with finite lives:
Gross carrying amount	$	1,967		$	1,972		$	1,972
Accumulated amortization	(1,407		)	(1,298		)	(1,258		)
Net carrying amount	$	560		$	674		$	714
Wealth management segment:
Customer list and other intangibles with finite lives:
Gross carrying amount	$	7,940		$	7,940		$	7,940
Accumulated amortization	(3,175		)	(2,838		)	(2,725		)
Net carrying amount	$	4,765		$	5,102		$	5,215
Total other intangible assets, net	$	27,378		$	17,621		$	18,651

Estimated amortization
Actual in nine months ended September 30, 2018	$	3,164
Estimated remaining in 2018	1,253
Estimated—2019	4,517
Estimated—2020	3,681
Estimated—2021	3,014
Estimated—2022	2,388

The core deposit intangibles recognized in connection with prior bank acquisitions are amortized over a ten-year period on an accelerated basis. The customer list intangibles recognized in connection with the purchase of life insurance premium finance assets in 2009 are being amortized over an 18-year period on an accelerated basis while the customer list intangibles recognized in connection with prior acquisitions within the wealth management segment are being amortized over a ten-year period on a straight-line basis. Indefinite-lived intangible assets consist of certain trade and domain names recognized in connection with the Veterans First acquisition. As indefinite-lived intangible assets are not amortized, the Company assesses impairment on at least an annual basis.

Total amortization expense associated with finite-lived intangibles totaled approximately $3.2 million and $3.4 million for the nine months ended September 30, 2018 and 2017, respectively.

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Mortgage Servicing Rights ("MSRs")

9 Months Ended

Sep. 30, 2018

Disclosures Pertaining to Servicing Assets and Servicing Liabilities [Abstract]

Mortgage Servicing Rights (MSRs)

Mortgage Servicing Rights (“MSRs”)

The following is a summary of the changes in the carrying value of MSRs, accounted for at fair value, for the periods indicated:

	Three Months Ended						Nine Months Ended
	September 30,			September 30,			September 30,			September 30,
(Dollars in thousands)	2018			2017			2018			2017
Balance at beginning of the period	$	63,194		$	27,307		$	33,676		$	19,103
Additions from loans sold with servicing retained	11,340			4,948			23,388			13,162
Additions from acquisitions	—			—			13,806			—
Estimate of changes in fair value due to:
Payoffs and paydowns	(1,081		)	(641		)	(3,647		)	(1,632		)
Changes in valuation inputs or assumptions	1,077			(2,200		)	7,307			(1,219		)
Fair value at end of the period	$	74,530		$	29,414		$	74,530		$	29,414
Unpaid principal balance of mortgage loans serviced for others	$	5,904,300		$	2,622,411

The Company recognizes MSR assets upon the sale of residential real estate loans to external third parties when it retains the obligation to service the loans and the servicing fee is more than adequate compensation. The initial recognition of MSR assets from loans sold with servicing retained and subsequent changes in fair value of all MSRs are recognized in mortgage banking revenue. MSRs are subject to changes in value from actual and expected prepayment of the underlying loans. The Company does not specifically hedge the value of its MSRs.

Fair values are determined by using a discounted cash flow model that incorporates the objective characteristics of the portfolio as well as subjective valuation parameters that purchasers of servicing would apply to such portfolios sold into the secondary market. The subjective factors include loan prepayment speeds, discount rates, servicing costs and other economic factors. The Company uses a third party to assist in the valuation of MSRs.

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Deposits

9 Months Ended

Sep. 30, 2018

Deposits [Abstract]

Deposits

Deposits

The following table is a summary of deposits as of the dates shown:

(Dollars in thousands)	September 30, 2018			December 31, 2017			September 30, 2017
Balance:
Non-interest bearing	$	6,399,213		$	6,792,497		$	6,502,409
NOW and interest bearing demand deposits	2,512,259			2,315,055			2,273,025
Wealth management deposits	2,520,120			2,323,699			2,171,758
Money market	5,429,921			4,515,353			4,607,995
Savings	2,595,164			2,829,373			2,673,201
Time certificates of deposit	5,460,038			4,407,370			4,666,675
Total deposits	$	24,916,715		$	23,183,347		$	22,895,063
Mix:
Non-interest bearing	26		%	29		%	28		%
NOW and interest bearing demand deposits	10			10			10
Wealth management deposits	10			10			10
Money market	22			20			20
Savings	10			12			12
Time certificates of deposit	22			19			20
Total deposits	100		%	100		%	100		%

Wealth management deposits represent deposit balances (primarily money market accounts) at the Company’s subsidiary banks from brokerage customer of Wintrust Investments, LLC ("Wintrust Investments"), trust and asset management customers of the Company and brokerage customers from unaffiliated companies.

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FHLB Advances, Other Borrowings and Subordinated Notes

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

FHLB Advances, Other Borrowings and Subordinated Notes

FHLB Advances, Other Borrowings and Subordinated Notes

The following table is a summary of FHLB advances, other borrowings and subordinated notes as of the dates shown:

(Dollars in thousands)	September 30, 2018		December 31, 2017		September 30, 2017
FHLB advances	$	615,000	$	559,663	$	468,962
Other borrowings:
Notes payable	149,799		41,222		41,216
Short-term borrowings	17,431		17,209		19,959
Other	48,043		49,131		49,502
Secured borrowings	158,298		158,561		141,003
Total other borrowings	373,571		266,123		251,680
Subordinated notes	139,172		139,088		139,052
Total FHLB advances, other borrowings and subordinated notes	$	1,127,743	$	964,874	$	859,694

FHLB Advances

FHLB advances consist of obligations of the banks and are collateralized by qualifying commercial and residential real estate and home equity loans and certain securities. FHLB advances are stated at par value of the debt adjusted for unamortized prepayment fees paid at the time of prior restructurings of FHLB advances and unamortized fair value adjustments recorded in connection with advances acquired through acquisitions.

Notes Payable

On September 18, 2018, the Company established a $150.0 million term facility ("Term Facility"), which is part of a $200.0 million loan agreement ("Credit Agreement") with unaffiliated banks. The Credit Agreement consists of the Term Facility with an original outstanding balance of $150.0 million and a $50.0 million revolving credit facility ("Revolving Credit Facility"). At September 30, 2018, the Company had a notes payable balance of $149.8 million under the Term Facility. The Term Facility is stated at par of the current outstanding balance of the debt adjusted for unamortized costs paid by the Company in relation to the debt issuance. The Company was contractually required to borrow the entire amount of the Term Facility on September 18, 2018 and all such borrowings must be repaid by September 18, 2023. Beginning December 31, 2018, the Company is required to make quarterly payments of principal plus interest on the Term Facility. At September 30, 2018, the Company had no outstanding balance under the Revolving Credit Facility. As no outstanding balance exists on the Revolving Credit Facility, unamortized costs paid by the Company in relation to the issuance of this debt are classified in other assets on the Consolidated Statements of Condition.

Borrowings under the Credit Agreement that are considered “Base Rate Loans” bear interest at a rate equal to the sum of (1) 50 basis points (in the case of a borrowing under the Revolving Credit Facility) or 75 basis points (in the case of a borrowing under the Term Facility) plus (2) the highest of (a) the federal funds rate plus 50 basis points, (b) the lender's prime rate, and (c) the Eurodollar Rate (as defined below) that would be applicable for an interest period of one month plus 100 basis points. Borrowings under the agreement that are considered “Eurodollar Rate Loans” bear interest at a rate equal to the sum of (1) 125 basis points (in the case of a borrowing under the Revolving Credit Facility) or 125 basis points (in the case of a borrowing under the Term Facility) plus (2) the LIBOR rate for the applicable period, as adjusted for statutory reserve requirements for eurocurrency liabilities (the “Eurodollar Rate”). A commitment fee is payable quarterly equal to 0.20% of the actual daily amount by which the lenders' commitment under the Revolving Credit Facility exceeded the amount outstanding under such facility.

Borrowings under the Credit Agreement are secured by pledges of and first priority perfected security interests in the Company's equity interest in its bank subsidiaries and contain several restrictive covenants, including the maintenance of various capital adequacy levels, asset quality and profitability ratios, and certain restrictions on dividends and other indebtedness. At September 30, 2018, the Company was in compliance with all such covenants. The Revolving Credit Facility and the Term Facility are available to be utilized, as needed, to provide capital to fund continued growth at the Company’s banks and to serve as an interim source of funds for acquisitions, common stock repurchases or other general corporate purposes.

In connection with the establishment of the Credit Agreement, all outstanding notes payable under a $150.0 million loan agreement with unaffiliated banks dated December 15, 2014 (as subsequently amended) were paid in full. This loan agreement consisted of a term facility with an original outstanding balance of $75.0 million and a $75.0 million revolving credit facility. The Company had a balance under this loan agreement of $41.2 million at December 31, 2017 and $41.2 million at September 30, 2017.

Short-term Borrowings

Short-term borrowings include securities sold under repurchase agreements and federal funds purchased. These borrowings totaled $17.4 million at September 30, 2018 compared to $17.2 million at December 31, 2017 and $20.0 million at September 30, 2017. At September 30, 2018, December 31, 2017 and September 30, 2017, securities sold under repurchase agreements represent $17.4 million, $17.2 million and $20.0 million, respectively, of customer sweep accounts in connection with master repurchase agreements at the banks. The Company records securities sold under repurchase agreements at their gross value and does not offset positions on the Consolidated Statements of Condition. As of September 30, 2018, the Company had pledged securities related to its customer balances in sweep accounts of $35.9 million. Securities pledged for customer balances in sweep accounts and short-term borrowings from brokers are maintained under the Company’s control and consist of U.S. Government agency and mortgage-backed securities. These securities are included in the available-for-sale and held-to-maturity securities portfolios as reflected on the Company’s Consolidated Statements of Condition.

The following is a summary of these securities pledged as of September 30, 2018 disaggregated by investment category and maturity of the related customer sweep account, and reconciled to the outstanding balance of securities sold under repurchase agreements:

(Dollars in thousands)	Overnight Sweep Collateral
Available-for-sale securities pledged
Mortgage-backed securities	$	9,547
Held-to-maturity securities pledged
U.S. Government agencies	26,364
Total collateral pledged	$	35,911
Excess collateral	18,480
Securities sold under repurchase agreements	$	17,431

Other Borrowings

Other borrowings at September 30, 2018 represent a fixed-rate promissory note issued by the Company in June 2017 ("Fixed-Rate Promissory Note") related to and secured by two office buildings owned by the Company, and non-recourse notes issued by the Company to other banks related to certain capital leases. At September 30, 2018, the Fixed-Rate Promissory Note had a balance of $48.0 million compared to $49.0 million at December 31, 2017 and $49.3 million at September 30, 2017. Under the Fixed-Rate Promissory Note, the Company will make monthly principal payments and pay interest at a fixed rate of 3.36% until maturity on June 30, 2022. The Fixed-Rate Promissory Note contains several restrictive covenants, including the maintenance of various capital adequacy levels, asset quality and profitability ratios, and certain restrictions on dividends and indebtedness. At September 30, 2018, the Company was in compliance with all such covenants. At September 30, 2018, there were no non-recourse notes related to certain capital leases, compared to $151,000 and $225,000 at December 31, 2017 and September 30, 2017, respectively.

Secured Borrowings

Secured borrowings at September 30, 2018 primarily represents transactions to sell an undivided co-ownership interest in all receivables owed to the Company's subsidiary, First Insurance Funding of Canada ("FIFC Canada"). In December 2014, FIFC Canada sold such interest to an unrelated third party in exchange for a cash payment of approximately C$150 million pursuant to a receivables purchase agreement (“Receivables Purchase Agreement”). The Receivables Purchase Agreement was amended in December 2015, effectively extending the maturity date from December 15, 2015 to December 15, 2017. Additionally, at that time, the unrelated third party paid an additional C$10 million, which increased the total payments to C$160 million. The Receivables Purchase Agreement was again amended in December 2017, effectively extending the maturity date from December 15, 2017 to December 16, 2019. Additionally, in December 2017, the unrelated third party paid an additional C$10 million, which increased the total payments to C$170 million. In June 2018, the unrelated third party paid an additional C$20 million, which increased the total payments to C$190 million. These transactions were not considered sales of receivables and, as such, related proceeds received are reflected on the Company’s Consolidated Statements of Condition as a secured borrowing owed to the unrelated third party, net of unamortized debt issuance costs, and translated to the Company’s reporting currency as of the respective date. At September 30, 2018, the translated balance of the secured borrowing totaled $147.2 million compared to $135.1 million at December 31, 2017 and $128.3 million at September 30, 2017. Additionally, the interest rate under the Receivables Purchase Agreement at September 30, 2018 was 2.7189%. The remaining $11.1 million within secured borrowings at September 30, 2018 represents other sold interests in certain loans by the Company that were not considered sales and, as such, related proceeds received are reflected on the Company’s Consolidated Statements of Condition as a secured borrowing owed to the various unrelated third parties.

Subordinated Notes

At September 30, 2018, the Company had outstanding subordinated notes totaling $139.2 million compared to $139.1 million and $139.1 million outstanding at December 31, 2017 and September 30, 2017, respectively. The notes have a stated interest rate of 5.00% and mature in June 2024. These notes are stated at par adjusted for unamortized costs paid related to the issuance of this debt.

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Junior Subordinated Debentures

9 Months Ended

Sep. 30, 2018

Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust [Abstract]

Junior Subordinated Debentures

Junior Subordinated Debentures

As of September 30, 2018, the Company owned 100% of the common securities of eleven trusts, Wintrust Capital Trust III, Wintrust Statutory Trust IV, Wintrust Statutory Trust V, Wintrust Capital Trust VII, Wintrust Capital Trust VIII, Wintrust Capital Trust IX, Northview Capital Trust I, Town Bankshares Capital Trust I, First Northwest Capital Trust I, Suburban Illinois Capital Trust II, and Community Financial Shares Statutory Trust II (the “Trusts”) set up to provide long-term financing. The Northview, Town, First Northwest, Suburban, and Community Financial Shares capital trusts were acquired as part of the acquisitions of Northview Financial Corporation, Town Bankshares, Ltd., First Northwest Bancorp, Inc., Suburban and CFIS, respectively. The Trusts were formed for purposes of issuing trust preferred securities to third-party investors and investing the proceeds from the issuance of the trust preferred securities and common securities solely in junior subordinated debentures issued by the Company (or assumed by the Company in connection with an acquisition), with the same maturities and interest rates as the trust preferred securities. The junior subordinated debentures are the sole assets of the Trusts. In each Trust, the common securities represent approximately 3% of the junior subordinated debentures and the trust preferred securities represent approximately 97% of the junior subordinated debentures.

The Trusts are reported in the Company’s consolidated financial statements as unconsolidated subsidiaries. Accordingly, in the Consolidated Statements of Condition, the junior subordinated debentures issued by the Company to the Trusts are reported as liabilities and the common securities of the Trusts, all of which are owned by the Company, are included in investment securities.

The following table provides a summary of the Company’s junior subordinated debentures as of September 30, 2018. The junior subordinated debentures represent the par value of the obligations owed to the Trusts.

(Dollars in thousands)	Common Securities		Trust  Preferred Securities		Junior Subordinated Debentures		Rate Structure	Contractual rate at 9/30/2018		Issue Date	Maturity Date	Earliest Redemption Date
Wintrust Capital Trust III	$	774	$	25,000	$	25,774	L+3.25	5.59	%	04/2003	04/2033	04/2008
Wintrust Statutory Trust IV	619		20,000		20,619		L+2.80	5.20	%	12/2003	12/2033	12/2008
Wintrust Statutory Trust V	1,238		40,000		41,238		L+2.60	5.00	%	05/2004	05/2034	06/2009
Wintrust Capital Trust VII	1,550		50,000		51,550		L+1.95	4.28	%	12/2004	03/2035	03/2010
Wintrust Capital Trust VIII	1,238		25,000		26,238		L+1.45	3.85	%	08/2005	09/2035	09/2010
Wintrust Capital Trust IX	1,547		50,000		51,547		L+1.63	3.96	%	09/2006	09/2036	09/2011
Northview Capital Trust I	186		6,000		6,186		L+3.00	5.34	%	08/2003	11/2033	08/2008
Town Bankshares Capital Trust I	186		6,000		6,186		L+3.00	5.34	%	08/2003	11/2033	08/2008
First Northwest Capital Trust I	155		5,000		5,155		L+3.00	5.40	%	05/2004	05/2034	05/2009
Suburban Illinois Capital Trust II	464		15,000		15,464		L+1.75	4.08	%	12/2006	12/2036	12/2011
Community Financial Shares Statutory Trust II	109		3,500		3,609		L+1.62	3.95	%	06/2007	09/2037	06/2012
Total					$	253,566		4.55	%

The junior subordinated debentures totaled $253.6 million at September 30, 2018, December 31, 2017 and September 30, 2017.

The interest rates on the variable rate junior subordinated debentures are based on the three-month LIBOR rate and reset on a quarterly basis. At September 30, 2018, the weighted average contractual interest rate on the junior subordinated debentures was 4.55%. Distributions on the common and preferred securities issued by the Trusts are payable quarterly at a rate per annum equal to the interest rates being earned by the Trusts on the junior subordinated debentures. Interest expense on the junior subordinated debentures is deductible for income tax purposes.

The Company has guaranteed the payment of distributions and payments upon liquidation or redemption of the trust preferred securities, in each case to the extent of funds held by the Trusts. The Company and the Trusts believe that, taken together, the obligations of the Company under the guarantees, the junior subordinated debentures, and other related agreements provide, in the aggregate, a full, irrevocable and unconditional guarantee, on a subordinated basis, of all of the obligations of the Trusts under the trust preferred securities. Subject to certain limitations, the Company has the right to defer the payment of interest on the junior subordinated debentures at any time, or from time to time, for a period not to exceed 20 consecutive quarters. The trust preferred securities are subject to mandatory redemption, in whole or in part, upon repayment of the junior subordinated debentures at maturity or their earlier redemption. The junior subordinated debentures are redeemable in whole or in part prior to maturity at any time after the earliest redemption dates shown in the table, and earlier at the discretion of the Company if certain conditions are met, and, in any event, only after the Company has obtained Federal Reserve Bank ("FRB") approval, if then required under applicable guidelines or regulations.

At September 30, 2018, the Company included $245.5 million of the junior subordinated debentures, net of common securities, in Tier 2 regulatory capital.

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Revenue from Contracts with Customers

9 Months Ended

Sep. 30, 2018

Revenue from Contract with Customer [Abstract]

Revenue from Contracts with Customers

Revenue from Contracts with Customers

As of January 1, 2018, the Company adopted ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606),” and all subsequent updates issued to clarify and improve specific areas of ASU 2014-09. The Company elected to adopt the new guidance using the modified retrospective approach applied to all contracts as of the date of initial application at January 1, 2018. Under the modified retrospective approach, the Company recognized no cumulative effect adjustment to the opening balance of retained earnings at the date of initial application.

Disaggregation of Revenue

As certain significant revenue sources related to financial instruments such as interest income are considered not in-scope, ASU 2014-09 did not have a significant impact on the Company's consolidated financial statements. The following table presents revenue from contracts with customers, considered in-scope under ASU 2014-09, disaggregated by the revenue source:

(Dollars in thousands)		Three Months Ended				Nine Months Ended
Revenue from contracts with customers	Location in income statement	September 30, 2018		September 30, 2017		September 30, 2018		September 30, 2017
Brokerage and insurance product commissions	Wealth management	$	5,579	$	5,127	$	17,394	$	16,796
Trust	Wealth management	3,003		2,932		9,646		9,477
Asset management	Wealth management	14,052		11,744		41,197		33,583
Total wealth management		22,634		19,803		68,237		59,856
Mortgage broker fees	Mortgage banking	295		412		862		1,142
Service charges on deposit accounts	Service charges on deposit accounts	9,331		8,645		27,339		25,606
Administrative services	Other non-interest income	1,099		1,052		3,365		3,062
Card related fees	Other non-interest income	2,328		1,471		5,583		4,315
Other deposit related fees	Other non-interest income	3,035		3,032		8,927		8,243
Total revenue from contracts with customers		$	38,722	$	34,415	$	114,313	$	102,224

Wealth Management Revenue

Wealth management revenue is comprised of brokerage and insurance product commissions, managed money fees and trust and asset management revenue of the Company's three wealth management subsidiaries: Wintrust Investments, Great Lakes Advisors, LLC ("GLA") and The Chicago Trust Company, N.A. ("CTC"). All wealth management revenue is recognized in the wealth management segment.

Brokerage and insurance product commissions consists primarily of commissions earned from trade execution services on behalf of customers and from selling mutual funds, insurance and other investment products to customers. For trade execution services, the Company recognizes commissions and receives payment from the brokerage customers at the point of transaction execution. Commissions received from the investment or insurance product providers are recognized at the point of sale of the product. The Company also receives trail and other commissions from providers for certain plans. These are generally based on qualifying account values and are recognized once the performance obligation, specific to each provider, is satisfied on a monthly, quarterly or annual basis.

Trust revenue is earned from trust and custody services that are generally performed over time. Revenue is determined periodically based on a schedule of fees applied to the value of each customer account using a time-elapsed method to measure progress toward complete satisfaction of the performance obligation. Fees are typically billed on a calendar month or quarter basis in advance or in arrears depending upon the contract. Additional fees earned for certain extraordinary services performed on behalf of the customers are recognized when the service has been performed.

Asset management revenue is earned from money management and advisory services that are performed over time. Revenue is based primarily on the market value of assets under management or administration using a time-elapsed method to measure progress toward complete satisfaction of the performance obligation. Fees are typically billed on a calendar month or quarter basis in advance or in arrears depending upon the contract. Certain programs provide the customer with an option of paying fees as a percentage of the account value or incurring commission charges for each trade similar to brokerage and insurance product commissions. Trade commissions and any other fees received for additional services are recognized at a point in time once the performance obligation is satisfied.

Mortgage Broker Fees

For customers desiring a mortgage product not currently offered by the Company, the Company may refer such customers and, with permission, direct such customers' applications to certain third party mortgage brokers. Mortgage broker fees are received from these brokers for such customer referrals upon settlement of the underlying mortgage. The Company's entitlement to the consideration is contingent on the settlement of the mortgage which is highly susceptible to factors outside of the Company's influence, such as third party broker's underwriting requirements. Also, the uncertainty surrounding the consideration could be resolved in varying lengths of time, dependent upon the third party brokers. Therefore, mortgage broker fees are recognized at the settlement of the underlying mortgage when the consideration is received. Broker fees are recognized in the community banking segment.

Service Charges on Deposit Accounts

Service charges on deposit accounts include fees charged to deposit customers for various services, including account analysis services, and are based on factors such as the size and type of customer, type of product and number of transactions. The fees are based on a standard schedule of fees and, depending on the nature of the service performed, the service is performed at a point in time or over a period of a month. When the service is performed at a point in time, the Company recognizes and receives revenue when the service has been performed. When the service is performed over a period of a month, the Company recognizes and receives revenue in the month the service has been performed. Service charges on deposit accounts are recognized in the community banking segment.

Administrative Services

Administrative services revenue is earned from providing outsourced administrative services, such as data processing of payrolls, billing and cash management services, to temporary staffing service clients located throughout the United States. Fees are charged periodically (typically a payroll cycle) and computed in accordance with the contractually determined rate applied to the total gross billings administered for the period. The revenue is recognized over the period using a time-elapsed method to measure progress toward complete satisfaction of the performance obligation. Other fees are charged on a per occurrence basis as the service is provided in the billing cycle. The Company has certain contracts with customers to perform outsourced administrative services and short-term accounts receivable financing. For these contracts, the total fee is allocated between the administrative services revenue and interest income during the client onboarding process based on the specific client and services provided. Administrative services revenue is recognized in the specialty finance segment.

Card and Deposit Related Fees

Card related fees include interchange and merchant revenue, and fees related to debit and credit cards. Interchange revenue is related to the Company issued debit cards. Other deposit related fees primarily include pay by phone processing fees, ATM and safe deposit box fees, check order charges and foreign currency related fees. Card and deposit related fees are generally based on volume of transactions and are recognized at the point in time when the service has been performed. For any consideration that is constrained, the revenue is recognized once the uncertainty is known. Upfront fees received from certain contracts are recognized on a straight line basis over the term of the contract. Card and deposit related fees are recognized in the community banking segment.

Contract Balances

The following table provides information about contract assets, contract liabilities and receivables from contracts with customers:

(Dollars in thousands)	September 30, 2018		December 31, 2017		September 30, 2017
Contract assets	$	—	$	—	$	—
Contract liabilities	$	1,429	$	1,706	$	1,799
Mortgage broker fees receivable	$	9	$	69	$	69
Administrative services receivable	2,425		—		—
Wealth management receivable	7,779		8,102		7,443
Card related fees receivable	—		202		89
Total receivables from contracts with customer	$	10,213	$	8,373	$	7,601

Contract liabilities represent upfront fees that the Company received at inception of certain contracts. The revenue recognized that was included in the contract liability balance at beginning of the period totaled $278,000 and $267,000 for the nine months ended September 30, 2018 and 2017, respectively. Receivables are recognized in the period the Company provides services when the Company's right to consideration is unconditional. Card related fee receivable is the result of volume based fee that the Company receives from a customer on an annual basis in the second quarter of each year. Payment terms on other invoiced amounts are typically 30 days or less. Contract liabilities and receivables from contracts with customers are included within the accrued interest payable and other liabilities and accrued interest receivable and other assets line items, respectively, in the Consolidated Statements of Condition.

Transaction price allocated to the remaining performance obligations

For contracts with an original expected length of more than one year, the following table presents the estimated future timing of recognition of upfront fees related to card and deposit related fees. These upfront fees represent performance obligations that are unsatisfied or partially unsatisfied at the end of the reporting period.

(Dollars in thousands)
Estimated remaining in 2018	$	92
Estimated—2019	369
Estimated—2020	369
Estimated—2021	303
Estimated—2022	153
Estimated—2023	143
Total	$	1,429

Practical Expedients and Exemptions

The Company does not adjust the promised amount of consideration for the effects of a significant financing component if the Company expects, at contract inception, that the period between when the Company transfers a promised service to a customer and when the customer pays for that services is one year or less.

The Company recognizes the incremental costs of obtaining a contract as an expense when incurred if the amortization period of the asset that the entity otherwise would have recognized is one year or less.

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Segment Information

9 Months Ended

Sep. 30, 2018

Segment Reporting [Abstract]

Segment Information

Segment Information

The Company’s operations consist of three primary segments: community banking, specialty finance and wealth management.

The three reportable segments are strategic business units that are separately managed as they offer different products and services and have different marketing strategies. In addition, each segment’s customer base has varying characteristics and each segment has a different regulatory environment. While the Company’s management monitors each of the fifteen bank subsidiaries’ operations and profitability separately, these subsidiaries have been aggregated into one reportable operating segment due to the similarities in products and services, customer base, operations, profitability measures, and economic characteristics.

For purposes of internal segment profitability, management allocates certain intersegment and parent company balances. Management allocates a portion of revenues to the specialty finance segment related to loans and leases originated by the specialty finance segment and sold or assigned to the community banking segment. Similarly, for purposes of analyzing the contribution from the wealth management segment, management allocates a portion of the net interest income earned by the community banking segment on deposit balances of customers of the wealth management segment to the wealth management segment. See Note 10 — Deposits, for more information on these deposits. Finally, expenses incurred at the Wintrust parent company are allocated to each segment based on each segment's risk-weighted assets.

The segment financial information provided in the following tables has been derived from the internal reporting system used by management to monitor and manage the financial performance of the Company. The accounting policies of the segments are substantially similar to those described in “Summary of Significant Accounting Policies” in Note 1 of the Company’s 2017 Form 10-K. The Company evaluates segment performance based on after-tax profit or loss and other appropriate profitability measures common to each segment.

The following is a summary of certain operating information for reportable segments:

	Three months ended						$ Change in Contribution			% Change  in Contribution
(Dollars in thousands)	September 30, 2018			September 30, 2017
Net interest income:
Community Banking	$	202,435		$	176,526		$	25,909		15	%
Specialty Finance	36,398			30,501			5,897			19
Wealth Management	4,048			4,557			(509		)	(11	)
Total Operating Segments	242,881			211,584			31,297			15
Intersegment Eliminations	4,682			4,404			278			6
Consolidated net interest income	$	247,563		$	215,988		$	31,575		15	%
Non-interest income:
Community Banking	$	69,776		$	52,554		$	17,222		33	%
Specialty Finance	16,963			16,315			648			4
Wealth Management	23,535			20,371			3,164			16
Total Operating Segments	110,274			89,240			21,034			24
Intersegment Eliminations	(10,344		)	(9,509		)	(835		)	(9	)
Consolidated non-interest income	$	99,930		$	79,731		$	20,199		25	%
Net revenue:
Community Banking	$	272,211		$	229,080		$	43,131		19	%
Specialty Finance	53,361			46,816			6,545			14
Wealth Management	27,583			24,928			2,655			11
Total Operating Segments	353,155			300,824			52,331			17
Intersegment Eliminations	(5,662		)	(5,105		)	(557		)	(11	)
Consolidated net revenue	$	347,493		$	295,719		$	51,774		18	%
Segment profit:
Community Banking	$	63,735		$	44,799		$	18,936		42	%
Specialty Finance	22,971			17,043			5,928			35
Wealth Management	5,242			3,784			1,458			39
Consolidated net income	$	91,948		$	65,626		$	26,322		40	%
Segment assets:
Community Banking	$	24,590,027		$	22,426,049		$	2,163,978		10	%
Specialty Finance	4,897,664			4,305,960			591,704			14
Wealth Management	655,040			626,153			28,887			5
Consolidated total assets	$	30,142,731		$	27,358,162		$	2,784,569		10	%

	Nine months ended						$ Change in Contribution			% Change  in Contribution
(Dollars in thousands)	September 30, 2018			September 30, 2017
Net interest income:
Community Banking	$	583,926		$	499,135		$	84,791		17	%
Specialty Finance	100,104			85,871			14,233			17
Wealth Management	12,729			14,532			(1,803		)	(12	)
Total Operating Segments	696,759			599,538			97,221			16
Intersegment Eliminations	14,056			13,439			617			5
Consolidated net interest income	$	710,815		$	612,977		$	97,838		16	%
Non-interest income:
Community Banking	$	192,028		$	160,277		$	31,751		20	%
Specialty Finance	49,005			44,192			4,813			11
Wealth Management	69,789			61,746			8,043			13
Total Operating Segments	310,822			266,215			44,607			17
Intersegment Eliminations	(29,980		)	(27,747		)	(2,233		)	(8	)
Consolidated non-interest income	$	280,842		$	238,468		$	42,374		18	%
Net revenue:
Community Banking	$	775,954		$	659,412		$	116,542		18	%
Specialty Finance	149,109			130,063			19,046			15
Wealth Management	82,518			76,278			6,240			8
Total Operating Segments	1,007,581			865,753			141,828			16
Intersegment Eliminations	(15,924		)	(14,308		)	(1,616		)	(11	)
Consolidated net revenue	$	991,657		$	851,445		$	140,212		16	%
Segment profit:
Community Banking	$	187,395		$	128,502		$	58,893		46	%
Specialty Finance	61,482			47,990			13,492			28
Wealth Management	14,632			12,409			2,223			18
Consolidated net income	$	263,509		$	188,901		$	74,608		39	%

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Derivative Financial Instruments

9 Months Ended

Sep. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

Derivative Financial Instruments

The Company primarily enters into derivative financial instruments as part of its strategy to manage its exposure to changes in interest rates. Derivative instruments represent contracts between parties that result in one party delivering cash to the other party based on a notional amount and an underlying term (such as a rate, security price or price index) as specified in the contract. The amount of cash delivered from one party to the other is determined based on the interaction of the notional amount of the contract with the underlying term. Derivatives are also implicit in certain contracts and commitments.

The derivative financial instruments currently used by the Company to manage its exposure to interest rate risk include: (1) interest rate swaps to manage the interest rate risk of certain fixed and variable rate assets and variable rate liabilities; (2) interest rate lock commitments provided to customers to fund certain mortgage loans to be sold into the secondary market; (3) forward commitments for the future delivery of such mortgage loans to protect the Company from adverse changes in interest rates and corresponding changes in the value of mortgage loans held-for-sale; and (4) covered call options to economically hedge specific investment securities and receive fee income effectively enhancing the overall yield on such securities to compensate for net interest margin compression. The Company also enters into derivatives (typically interest rate swaps) with certain qualified borrowers to facilitate the borrowers’ risk management strategies and concurrently enters into mirror-image derivatives with a third party counterparty, effectively making a market in the derivatives for such borrowers. Additionally, the Company enters into foreign currency contracts to manage foreign exchange risk associated with certain foreign currency denominated assets.

The Company recognizes derivative financial instruments in the consolidated financial statements at fair value regardless of the purpose or intent for holding the instrument. The Company records derivative assets and derivative liabilities on the Consolidated Statements of Condition within accrued interest receivable and other assets and accrued interest payable and other liabilities, respectively. Changes in the fair value of derivative financial instruments are either recognized in income or in shareholders’ equity as a component of other comprehensive income depending on whether the derivative financial instrument qualifies for hedge accounting and, if so, whether it qualifies as a fair value hedge or cash flow hedge.

As of January 1, 2018, the Company elected to early adopt ASU No. 2017-12, “Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities.” Generally, changes in fair values of derivatives accounted for as fair value hedges are recorded in income in the same period and in the same income statement line as changes in the fair values of the hedged items that relate to the hedged risk(s). Changes in fair values of derivative financial instruments accounted for as cash flow hedges are recorded as a component of other comprehensive income, net of deferred taxes, and reclassified to earnings when the hedged transaction affects earnings. Changes in fair values of derivative financial instruments not designated in a hedging relationship pursuant to ASC 815 are reported in non-interest income during the period of the change. Derivative financial instruments are valued by a third party and are corroborated by comparison with valuations provided by the respective counterparties. Fair values of certain mortgage banking derivatives (interest rate lock commitments and forward commitments to sell mortgage loans) are estimated based on changes in mortgage interest rates from the date of the loan commitment. The fair value of foreign currency derivatives is computed based on changes in foreign currency rates stated in the contract compared to those prevailing at the measurement date.

The table below presents the fair value of the Company’s derivative financial instruments as of September 30, 2018, December 31, 2017 and September 30, 2017:

	Derivative Assets						Derivative Liabilities
(Dollars in thousands)	September 30, 2018		December 31, 2017		September 30, 2017		September 30, 2018		December 31, 2017		September 30, 2017
Derivatives designated as hedging instruments under ASC 815:
Interest rate derivatives designated as Cash Flow Hedges	$	16,271	$	11,914	$	8,643	$	—	$	12	$	—
Interest rate derivatives designated as Fair Value Hedges	5,126		2,932		2,036		—		—		53
Total derivatives designated as hedging instruments under ASC 815	$	21,397	$	14,846	$	10,679	$	—	$	12	$	53
Derivatives not designated as hedging instruments under ASC 815:
Interest rate derivatives	$	69,865	$	34,139	$	34,489	$	69,342	$	33,704	$	33,982
Interest rate lock commitments	4,128		2,843		2,851		—		269		1
Forward commitments to sell mortgage loans	12		14		19		1,330		1,457		1,495
Foreign exchange contracts	751		227		160		709		229		242
Total derivatives not designated as hedging instruments under ASC 815	$	74,756	$	37,223	$	37,519	$	71,381	$	35,659	$	35,720
Total Derivatives	$	96,153	$	52,069	$	48,198	$	71,381	$	35,671	$	35,773

Cash Flow Hedges of Interest Rate Risk

The Company’s objectives in using interest rate derivatives are to add stability to net interest income and to manage its exposure to interest rate movements. To accomplish these objectives, the Company primarily uses interest rate swaps as part of its interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the receipt of variable-rate amounts from a counterparty in exchange for the Company making fixed-rate payments over the life of the agreements without the exchange of the underlying notional amount. Interest rate collars designated as cash flow hedges involve the receipt of amounts in which the interest rate specified in the contract exceeds the agreed upon cap strike price or the payment of amounts in which the interest rate specified in the contract is below the agreed upon floor strike price at the end of each period.

As of September 30, 2018, the Company had eight interest rate swap derivatives designated as cash flow hedges of variable rate deposits and one interest rate collar derivative designated as a cash flow hedge of variable rate debt. When the relationship between the hedged item and hedging instrument is highly effective at achieving offsetting changes in cash flows attributable to the hedged risk, changes in the fair value of these cash flow hedges are recorded in accumulated other comprehensive income and are subsequently reclassified to interest expense as interest payments are made on such variable rate deposits. The changes in fair value (net of tax) are separately disclosed in the Consolidated Statements of Comprehensive Income.

The table below provides details on each of these cash flow hedges as of September 30, 2018:

	September 30, 2018
(Dollars in thousands)	Notional		Fair Value
Maturity Date	Amount		Asset (Liability)
Interest Rate Swaps:
June 2019	$	200,000	$	1,445
July 2019	250,000		3,275
August 2019	275,000		4,399
January 2020	175,000		1,554
January 2020	25,000		222
April 2020	50,000		317
April 2020	200,000		1,267
June 2020	200,000		3,741
Interest Rate Collars:
September 2023	150,000		51
Total Cash Flow Hedges	$	1,525,000	$	16,271

A rollforward of the amounts in accumulated other comprehensive loss related to interest rate derivatives designated as cash flow hedges follows:

	Three months ended					Nine months ended
(Dollars in thousands)	September 30, 2018			September 30, 2017		September 30, 2018			September 30, 2017
Unrealized gain at beginning of period	$	16,059		$	8,249	$	11,902		$	6,944
Amount reclassified from accumulated other comprehensive loss to interest expense on deposits and junior subordinated debentures	(2,319		)	14		(4,338		)	1,051
Amount of gain recognized in other comprehensive income	2,531			380		8,707			648
Unrealized gain at end of period	$	16,271		$	8,643	$	16,271		$	8,643

As of September 30, 2018, the Company estimates that during the next twelve months $14.2 million will be reclassified from accumulated other comprehensive gain (loss) as a reduction to interest expense.

Fair Value Hedges of Interest Rate Risk

Interest rate swaps designated as fair value hedges involve the payment of fixed amounts to a counterparty in exchange for the Company receiving variable payments over the life of the agreements without the exchange of the underlying notional amount. As of September 30, 2018, the Company has twelve interest rate swaps with an aggregate notional amount of $164.2 million that were designated as fair value hedges associated with fixed rate commercial and industrial and commercial franchise loans as well as life insurance premium finance receivables. Two of these interest rate swaps with an aggregate notional amount of $55.3 million were effective starting after September 30, 2018.

For derivatives designated and that qualify as fair value hedges, the net gain or loss from the entire change in the fair value of the derivative instrument is recognized in the same income statement line item as the earnings effect, including the net gain or loss, of the hedged item (interest income earned on fixed rate loans) when the hedged item affects earnings.

The following table presents the carrying amount of the hedged assets/(liabilities) and the cumulative amount of fair value hedging adjustment included in the carrying amount of the hedged assets/(liabilities) that are designated as a fair value hedge accounting relationship as of September 30, 2018:

		September 30, 2018
(Dollars in thousands) Derivatives in Fair Value Hedging Relationships	Location in the Statement of Condition	Carrying Amount of the Hedged Assets/(Liabilities)		Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities)			Cumulative Amount of Fair Value Hedging Adjustment Remaining for any Hedged Assets (Liabilities) for which Hedge Accounting has been Discontinued
Interest rate swaps	Loans, net of unearned income, excluding covered loans	$	129,496	$	(5,082	)	$	—

The following table presents the loss or gain recognized related to derivative instruments that are designated as fair value hedges for the respective periods:

(Dollars in thousands) Derivatives in Fair Value Hedging Relationships	Location of (Loss)/Gain Recognized in Income on Derivative	Three Months Ended			Nine Months Ended
		September 30, 2018			September 30, 2018
Interest rate swaps	Interest and fees on loans	$	(25	)	$	(55	)

During the three months ended September 30, 2018, one interest rate swap designated as a fair value hedge accounting relationship was terminated as a result of the full prepayment of the underlying loan (hedged asset). At the time of the termination, the fair value of the interest rate swap asset was approximately $1.4 million with an offsetting cumulative amount of fair value hedging adjustments included in the carrying value of the underlying loan totaling $1.6 million. As the underlying loan was fully paid-off, the remaining cumulative amount of fair value hedging adjustments included in the carrying value of the underlying loan was recorded to interest income.

Non-Designated Hedges

The Company does not use derivatives for speculative purposes. Derivatives not designated as accounting hedges are used to manage the Company’s economic exposure to interest rate movements and other identified risks but do not meet the strict hedge accounting requirements of ASC 815. Changes in the fair value of derivatives not designated in hedging relationships are recorded directly in earnings.

Interest Rate Derivatives—The Company has interest rate derivatives, including swaps and option products, resulting from a service the Company provides to certain qualified borrowers. The Company’s banking subsidiaries execute certain derivative products (typically interest rate swaps) directly with qualified commercial borrowers to facilitate their respective risk management strategies. For example, these arrangements allow the Company’s commercial borrowers to effectively convert a variable rate loan to a fixed rate. In order to minimize the Company’s exposure on these transactions, the Company simultaneously executes offsetting derivatives with third parties. In most cases, the offsetting derivatives have mirror-image terms, which result in the positions’ changes in fair value substantially offsetting through earnings each period. However, to the extent that the derivatives are not a mirror-image and because of differences in counterparty credit risk, changes in fair value will not completely offset resulting in some earnings impact each period. Changes in the fair value of these derivatives are included in other non-interest income. At September 30, 2018, the Company had interest rate derivative transactions with an aggregate notional amount of approximately $6.1 billion (all interest rate swaps and caps with customers and third parties) related to this program. These interest rate derivatives had maturity dates ranging from October 2018 to February 2045.

Mortgage Banking Derivatives—These derivatives include interest rate lock commitments provided to customers to fund certain mortgage loans to be sold into the secondary market and forward commitments for the future delivery of such loans. It is the Company’s practice to enter into forward commitments for the future delivery of a portion of our residential mortgage loan production when interest rate lock commitments are entered into in order to economically hedge the effect of future changes in interest rates on its commitments to fund the loans as well as on its portfolio of mortgage loans held-for-sale. The Company’s mortgage banking derivatives have not been designated as being in hedge relationships. At September 30, 2018, the Company had forward commitments to sell mortgage loans with an aggregate notional amount of approximately $698.2 million and interest rate lock commitments with an aggregate notional amount of approximately $379.5 million. The fair values of these derivatives were estimated based on changes in mortgage rates from the dates of the commitments. Changes in the fair value of these mortgage banking derivatives are included in mortgage banking revenue.

Foreign Currency Derivatives—These derivatives include foreign currency contracts used to manage the foreign exchange risk associated with foreign currency denominated assets and transactions. Foreign currency contracts, which include spot and forward contracts, represent agreements to exchange the currency of one country for the currency of another country at an agreed-upon price on an agreed-upon settlement date. As a result of fluctuations in foreign currencies, the U.S. dollar-equivalent value of the foreign currency denominated assets or forecasted transactions increase or decrease. Gains or losses on the derivative instruments related to these foreign currency denominated assets or forecasted transactions are expected to substantially offset this variability. As of September 30, 2018 the Company held foreign currency derivatives with an aggregate notional amount of approximately $37.9 million.

Other Derivatives—Periodically, the Company will sell options to a bank or dealer for the right to purchase certain securities held within the banks’ investment portfolios (covered call options). These option transactions are designed primarily to mitigate overall interest rate risk and to increase the total return associated with the investment securities portfolio. These options do not qualify as accounting hedges pursuant to ASC 815, and, accordingly, changes in fair value of these contracts are recognized as other non-interest income. There were no covered call options outstanding as of September 30, 2018, December 31, 2017 or September 30, 2017.

Amounts included in the Consolidated Statements of Income related to derivative instruments not designated in hedge relationships were as follows:

(Dollars in thousands)		Three Months Ended						Nine Months Ended
Derivative	Location in income statement	September 30, 2018			September 30, 2017			September 30, 2018		September 30, 2017
Interest rate swaps and caps	Trading (losses) gains, net	$	(55	)	$	(94	)	$	89	$	(762	)
Mortgage banking derivatives	Mortgage banking revenue	(1,122		)	708			858		1,398
Covered call options	Fees from covered call options	627			1,143			2,893		2,792
Foreign exchange contracts	Trading (losses) gains, net	(18		)	(23		)	51		(115		)

Credit Risk

Derivative instruments have inherent risks, primarily market risk and credit risk. Market risk is associated with changes in interest rates and credit risk relates to the risk that the counterparty will fail to perform according to the terms of the agreement. The amounts potentially subject to market and credit risks are the streams of interest payments under the contracts and the market value of the derivative instrument and not the notional principal amounts used to express the volume of the transactions. Market and credit risks are managed and monitored as part of the Company's overall asset-liability management process, except that the credit risk related to derivatives entered into with certain qualified borrowers is managed through the Company's standard loan underwriting process since these derivatives are secured through collateral provided by the loan agreements. Actual exposures are monitored against various types of credit limits established to contain risk within parameters. When deemed necessary, appropriate types and amounts of collateral are obtained to minimize credit exposure.

The Company has agreements with certain of its interest rate derivative counterparties that contain cross-default provisions, which provide that if the Company defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then the Company could also be declared in default on its derivative obligations. The Company also has agreements with certain of its derivative counterparties that contain a provision allowing the counterparty to terminate the derivative positions if the Company fails to maintain its status as a well or adequately capitalized institution, which would require the Company to settle its obligations under the agreements. As of September 30, 2018, the fair value of interest rate derivatives in a net liability position that were subject to such agreements, which includes accrued interest related to these agreements, was $162,000. If the Company had breached any of these provisions and the derivatives were terminated as a result, the Company would have been required to settle its obligations under the agreements at the termination value and would have been required to pay any additional amounts due in excess of amounts previously posted as collateral with the respective counterparty.

The Company is also exposed to the credit risk of its commercial borrowers who are counterparties to interest rate derivatives with the banks. This counterparty risk related to the commercial borrowers is managed and monitored through the banks' standard underwriting process applicable to loans since these derivatives are secured through collateral provided by the loan agreement. The counterparty risk associated with the mirror-image swaps executed with third parties is monitored and managed in connection with the Company's overall asset liability management process.

The Company records interest rate derivatives subject to master netting agreements at their gross value and does not offset derivative assets and liabilities on the Consolidated Statements of Condition. The tables below summarize the Company's interest rate derivatives and offsetting positions as of the dates shown.

	Derivative Assets									Derivative Liabilities
	Fair Value									Fair Value
(Dollars in thousands)	September 30, 2018			December 31, 2017			September 30, 2017			September 30, 2018			December 31, 2017			September 30, 2017
Gross Amounts Recognized	$	91,262		$	48,985		$	45,168		$	69,342		$	33,716		$	34,035
Less: Amounts offset in the Statements of Financial Condition	—			—			—			—			—			—
Net amount presented in the Statements of Financial Condition	$	91,262		$	48,985		$	45,168		$	69,342		$	33,716		$	34,035
Gross amounts not offset in the Statements of Financial Condition
Offsetting Derivative Positions	$	(7,887	)	(14,878		)	(16,213		)	$	(7,887	)	(14,878		)	(16,213		)
Collateral Posted	(76,530		)	(18,060		)	(2,950		)	(340		)	(2,220		)	(17,130		)
Net Credit Exposure	$	6,845		$	16,047		$	26,005		$	61,115		$	16,618		$	692

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Fair Values of Assets and Liabilities

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Fair Values of Assets and Liabilities

Fair Values of Assets and Liabilities

The Company measures, monitors and discloses certain of its assets and liabilities on a fair value basis. These financial assets and financial liabilities are measured at fair value in three levels, based on the markets in which the assets and liabilities are traded and the observability of the inputs used to determine fair value. These levels are:

• Level 1—unadjusted quoted prices in active markets for identical assets or liabilities.

• Level 2—inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability or inputs that are derived principally from or corroborated by observable market data by correlation or other means.

• Level 3—significant unobservable inputs that reflect the Company’s own assumptions that market participants would use in pricing the assets or liabilities. Level 3 assets and liabilities include financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation.

A financial instrument’s categorization within the above valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the assets or liabilities. The following is a description of the valuation methodologies used for the Company’s assets and liabilities measured at fair value on a recurring basis.

Available-for-sale securities, trading account securities and equity securities with readily determinable fair value—Fair values for available-for-sale securities, trading account securities and equity securities with readily determinable fair value are typically based on prices obtained from independent pricing vendors. Securities measured with these valuation techniques are generally classified as Level 2 of the fair value hierarchy. Typically, standard inputs such as benchmark yields, reported trades for similar securities, issuer spreads, benchmark securities, bids, offers and reference data including market research publications are used to fair value a security. When these inputs are not available, broker/dealer quotes may be obtained by the vendor to determine the fair value of the security. We review the vendor’s pricing methodologies to determine if observable market information is being used, versus unobservable inputs. Fair value measurements using significant inputs that are unobservable in the market due to limited activity or a less liquid market are classified as Level 3 in the fair value hierarchy.

The Company’s Investment Operations Department is responsible for the valuation of Level 3 available-for-sale securities. The methodology and variables used as inputs in pricing Level 3 securities are derived from a combination of observable and unobservable inputs. The unobservable inputs are determined through internal assumptions that may vary from period to period due to external factors, such as market movement and credit rating adjustments.

At September 30, 2018, the Company classified $97.6 million of municipal securities as Level 3. These municipal securities are bond issues for various municipal government entities primarily located in the Chicago metropolitan area and southern Wisconsin and are privately placed, non-rated bonds without CUSIP numbers. The Company also classified $3.3 million of U.S. government agencies as Level 3 at September 30, 2018. The Company’s methodology for pricing these securities focuses on three distinct inputs: equivalent rating, yield and other pricing terms. To determine the rating for a given non-rated municipal bond, the Investment Operations Department references a rated, publicly issued bond by the same issuer if available. A reduction is then applied to the rating obtained from the comparable bond, as the Company believes if liquidated, a non-rated bond would be valued less than a similar bond with a verifiable rating. The reduction applied by the Company is one complete rating grade (i.e. a “AA” rating for a comparable bond would be reduced to “A” for the Company’s valuation). For bond issues without comparable bond proxies, a rating of "BBB" was assigned. In the third quarter of 2018, all of the ratings derived by the Investment Operations Department using the above process were "BBB" or better. The fair value measurement of municipal bonds is sensitive to the rating input, as a higher rating typically results in an increased valuation. The remaining pricing inputs used in the bond valuation are observable. Based on the rating determined in the above process, Investment Operations obtains a corresponding current market yield curve available to market participants. Other terms including coupon, maturity date, redemption price, number of coupon payments per year, and accrual method are obtained from the individual bond term sheets. Certain municipal bonds held by the Company at September 30, 2018 are continuously callable. When valuing these bonds, the fair value is capped at par value as the Company assumes a market participant would not pay more than par for a continuously callable bond. To determine the rating for the U.S. government agency securities, the Investment Operations Department assigned a AAA rating as it is guaranteed by the U.S. government.

Mortgage loans held-for-sale—The fair value of mortgage loans held-for-sale is determined by reference to investor price sheets for loan products with similar characteristics.

Loans held-for-investment—The fair value for loans in which the Company elected the fair value option is estimated by discounting future scheduled cash flows for the specific loan through maturity, adjusted for estimated credit losses and prepayments. The Company uses a discount rate based on the actual coupon rate of the underlying loan. At September 30, 2018, the Company classified $13.5 million of loans held-for-investment as Level 3. The weighted average discount rate used as an input to value these loans at September 30, 2018 was 4.57% with discount rates applied ranging from 4%-5%. The higher the rate utilized to discount estimated future cash flows, the lower the fair value measurement. As noted above, the fair value estimate also includes assumptions of prepayment speeds and credit losses. The Company included a prepayments speed assumption of 10.31% at September 30, 2018. Prepayment speeds are inversely related to the fair value of these loans as an increase in prepayment speeds results in a decreased valuation. Additionally, the weighted average credit discount used as an input to value the specific loans was 1.00% with credit loss discount ranging from 0%-7% at September 30, 2018.

MSRs—Fair value for MSRs is determined utilizing a valuation model which calculates the fair value of each servicing rights based on the present value of estimated future cash flows. The Company uses a discount rate commensurate with the risk associated with each servicing rights, given current market conditions. At September 30, 2018, the Company classified $74.5 million of MSRs as Level 3. The weighted average discount rate used as an input to value the pool of MSRs at September 30, 2018 was 10.03% with discount rates applied ranging from 7%-18%. The higher the rate utilized to discount estimated future cash flows, the lower the fair value measurement. The fair value of MSRs was also estimated based on other assumptions including prepayment speeds and the cost to service. Prepayment speeds used as an input to value the MSRs at September 30, 2018 ranged from 0%-81% or a weighted average prepayment speed of 10.03%. Further, for current and delinquent loans, the Company assumed a weighted average cost of servicing of $78 and $274, respectively, per loan. Prepayment speeds and the cost to service are both inversely related to the fair value of MSRs as an increase in prepayment speeds or the cost to service results in a decreased valuation. See Note 9 - Mortgage Servicing Rights (“MSRs”) for further discussion of MSRs.

Derivative instruments—The Company’s derivative instruments include interest rate swaps, caps and collars, commitments to fund mortgages for sale into the secondary market (interest rate locks), forward commitments to end investors for the sale of mortgage loans and foreign currency contracts. Interest rate swaps, caps and collars are valued by a third party, using models that primarily use market observable inputs, such as yield curves, and are validated by comparison with valuations provided by the respective counterparties. The credit risk associated with derivative financial instruments that are subject to master netting agreements is measured on a net basis by counterparty portfolio. The fair value for mortgage-related derivatives is based on changes in mortgage rates from the date of the commitments. The fair value of foreign currency derivatives is computed based on change in foreign currency rates stated in the contract compared to those prevailing at the measurement date.

At September 30, 2018, the Company classified $2.5 million of derivative assets related to interest rate locks as Level 3. The fair value of interest rate locks is based on prices obtained for loans with similar characteristics from third parties, adjusted for the pull-through rate, which represents the Company’s best estimate of the likelihood that a committed loan will ultimately fund. The weighted-average pull-through rate at September 30, 2018 was 91.12% with pull-through rates applied ranging from 20% to 100%. Pull-through rates are directly related to the fair value of interest rate locks as an increase in the pull-through rate results in an increased valuation.

Nonqualified deferred compensation assets—The underlying assets relating to the nonqualified deferred compensation plan are included in a trust and primarily consist of non-exchange traded institutional funds which are priced based by an independent third party service.

The following tables present the balances of assets and liabilities measured at fair value on a recurring basis for the periods presented:

	September 30, 2018
(Dollars in thousands)	Total		Level 1		Level 2		Level 3
Available-for-sale securities
U.S. Treasury	$	124,761	$	—	$	124,761	$	—
U.S. Government agencies	111,020		—		107,705		3,315
Municipal	133,373		—		35,787		97,586
Corporate notes	93,453		—		93,453		—
Mortgage-backed	1,702,378		—		1,702,378		—
Trading account securities	688		—		688		—
Equity securities with readily determinable fair value	36,414		—		36,414		—
Mortgage loans held-for-sale	338,111		—		338,111		—
Loans held-for-investment	77,883		—		64,427		13,456
MSRs	74,530		—		—		74,530
Nonqualified deferred compensation assets	12,503		—		12,503		—
Derivative assets	96,153		—		93,661		2,492
Total	$	2,801,267	$	—	$	2,609,888	$	191,379
Derivative liabilities	$	71,381	$	—	$	71,381	$	—

	December 31, 2017
(Dollars in thousands)	Total		Level 1		Level 2		Level 3
Available-for-sale securities
U.S. Treasury	$	143,822	$	—	$	143,822	$	—
U.S. Government agencies	156,915		—		153,136		3,779
Municipal	115,352		—		38,171		77,181
Corporate notes	31,050		—		31,050		—
Mortgage-backed	1,319,725		—		1,319,725		—
Equity securities	36,802		—		36,802		—
Trading account securities	995		—		995		—
Mortgage loans held-for-sale	313,592		—		313,592		—
Loans held-for-investment	33,717		—		—		33,717
MSRs	33,676		—		—		33,676
Nonqualified deferred compensation assets	11,065		—		11,065		—
Derivative assets	52,069		—		49,912		2,157
Total	$	2,248,780	$	—	$	2,098,270	$	150,510
Derivative liabilities	$	35,671	$	—	$	35,671	$	—

	September 30, 2017
(Dollars in thousands)	Total		Level 1		Level 2		Level 3
Available-for-sale securities
U.S. Treasury	$	144,145	$	—	$	144,145	$	—
U.S. Government agencies	159,328		—		155,385		3,943
Municipal	116,016		—		47,633		68,383
Corporate notes	60,614		—		60,614		—
Mortgage-backed	1,149,448		—		1,149,448		—
Equity securities	36,352		—		36,352		—
Trading account securities	643		—		643		—
Mortgage loans held-for-sale	370,282		—		370,282		—
Loans held-for-investment	29,704		—		—		29,704
MSRs	29,414		—		—		29,414
Nonqualified deferred compensation assets	10,824		—		10,824		—
Derivative assets	48,198		—		46,982		1,216
Total	$	2,154,968	$	—	$	2,022,308	$	132,660
Derivative liabilities	$	35,773	$	—	$	35,773	$	—

The aggregate remaining contractual principal balance outstanding as of September 30, 2018, December 31, 2017 and September 30, 2017 for mortgage loans held-for-sale measured at fair value under ASC 825 was $317.4 million, $299.5 million and $356.4 million, respectively, while the aggregate fair value of mortgage loans held-for-sale was $338.1 million, $313.6 million and $370.3 million, for the same respective periods, as shown in the above tables. There were $622,000 of loans past due greater than 90 days and still accruing in the mortgage loans held-for-sale portfolio as of September 30, 2018 and no loans as of December 31, 2017 and September 30, 2017.

The changes in Level 3 assets measured at fair value on a recurring basis during the three and nine months ended September 30, 2018 and 2017 are summarized as follows:

				U.S. Government Agencies			Loans held-for- investment			Mortgage servicing rights		Derivative Assets
(Dollars in thousands)	Municipal
Balance at July 1, 2018	$	96,566		$	3,482		$	13,764		$	63,194	$	3,819
Total net gains (losses) included in:
Net income (1)	—			—			(32		)	11,336		(1,327		)
Other comprehensive loss	(2,573		)	(9		)	—			—		—
Purchases	4,830			—			—			—		—
Issuances	—			—			—			—		—
Sales	—			—			—			—		—
Settlements	(1,237		)	(158		)	(1,520		)	—		—
Net transfers into/(out of) Level 3	—			—			1,244			—		—
Balance at September 30, 2018	$	97,586		$	3,315		$	13,456		$	74,530	$	2,492

(1) Changes in the balance of MSRs and derivative assets related to fair value adjustments are recorded as components of mortgage banking revenue. Changes in the balance of loans held-for-investment related to fair value adjustments are recorded as other non-interest income.

				U.S. Government Agencies			Loans held-for- investment			Mortgage servicing rights		Derivative Assets
(Dollars in thousands)	Municipal
Balance at January 1, 2018	$	77,181		$	3,779		$	33,717		$	33,676	$	2,157
Total net gains (losses) included in:
Net income (1)	—			—			(1,420		)	27,048		335
Other comprehensive loss	(5,658		)	(306		)	—			—		—
Purchases (2)	31,846			—			—			13,806		—
Issuances	—			—			—			—		—
Sales	—			—			—			—		—
Settlements	(5,783		)	(158		)	(24,177		)	—		—
Net transfers into/(out of) Level 3	—			—			5,336			—		—
Balance at September 30, 2018	$	97,586		$	3,315		$	13,456		$	74,530	$	2,492

				U.S. Government Agencies			Loans held-for- investment			Mortgage servicing rights		Derivative Assets
(Dollars in thousands)	Municipal
Balance at July 1, 2017	$	77,341		$	4,110		$	30,173		$	27,307	$	1,047
Total net gains (losses) included in:
Net income (1)	—			—			177			2,107		169
Other comprehensive income (loss)	(4,113		)	(167		)	—			—		—
Purchases	—			—			—			—		—
Issuances	—			—			—			—		—
Sales	—			—			—			—		—
Settlements	(4,845		)	—			(4,504		)	—		—
Net transfers into/(out of) Level 3	—			—			3,858			—		—
Balance at September 30, 2017	$	68,383		$	3,943		$	29,704		$	29,414	$	1,216

				U.S. Government Agencies			Loans held-for- investment			Mortgage servicing rights		Derivative Assets
(Dollars in thousands)	Municipal
Balance at January 1, 2017	$	79,626		$	—		$	22,137		$	19,103	$	2,291
Total net gains (losses) included in:
Net income (1)	—			—			1,369			10,311		(1,075		)
Other comprehensive income (loss)	(1,084		)	(340		)	—			—		—
Purchases	10,879			—			—			—		—
Issuances	—			—			—			—		—
Sales	—			—			—			—		—
Settlements	(21,038		)	—			(9,995		)	—		—
Net transfers into/(out of) Level 3	—			4,283			16,193			—		—
Balance at September 30, 2017	$	68,383		$	3,943		$	29,704		$	29,414	$	1,216

(1) Changes in the balance of MSRs and derivative assets related to fair value adjustments are recorded as components of mortgage banking revenue. Changes in the balance of loans held-for-investment related to fair value adjustments are recorded as other non-interest income.

(2) Purchased as a part of the Veterans First business combination. See Note 3 - Business Combinations for further discussion.

Also, the Company may be required, from time to time, to measure certain other financial assets at fair value on a nonrecurring basis in accordance with GAAP. These adjustments to fair value usually result from impairment charges on individual assets. For assets measured at fair value on a nonrecurring basis that were still held in the balance sheet at the end of the period, the following table provides the carrying value of the related individual assets or portfolios at September 30, 2018.

	September 30, 2018								Three Months Ended September 30, 2018 Fair Value Losses Recognized, net		Nine Months Ended September 30, 2018 Fair Value Losses Recognized, net
(Dollars in thousands)	Total		Level 1		Level 2		Level 3
Impaired loans—collateral based	$	106,219	$	—	$	—	$	106,219	$	3,978	$	11,152
Other real estate owned (1)	28,303		—		—		28,303		1,504		5,173
Total	$	134,522	$	—	$	—	$	134,522	$	5,482	$	16,325

(1) Fair value losses recognized, net on other real estate owned include valuation adjustments and charge-offs during the respective period.

Impaired loans—A loan is considered to be impaired when, based on current information and events, it is probable that the Company will be unable to collect all amounts due pursuant to the contractual terms of the loan agreement. A loan modified in a TDR is an impaired loan according to applicable accounting guidance. Impairment is measured by estimating the fair value of the loan based on the present value of expected cash flows, the market price of the loan, or the fair value of the underlying collateral. Impaired loans are considered a fair value measurement where an allowance is established based on the fair value of collateral. Appraised values, which may require adjustments to market-based valuation inputs, are generally used on real estate collateral-dependent impaired loans.

The Company’s Managed Assets Division is primarily responsible for the valuation of Level 3 inputs of impaired loans. For more information on the Managed Assets Division review of impaired loans refer to Note 7 – Allowance for Loan Losses, Allowance for Losses on Lending-Related Commitments and Impaired Loans. At September 30, 2018, the Company had $132.5 million of impaired loans classified as Level 3. Of the $132.5 million of impaired loans, $106.2 million were measured at fair value based on the underlying collateral of the loan as shown in the table above. The remaining $26.3 million were valued based on discounted cash flows in accordance with ASC 310.

Other real estate owned —Other real estate owned is comprised of real estate acquired in partial or full satisfaction of loans and is included in other assets. Other real estate owned is recorded at its estimated fair value less estimated selling costs at the date of transfer, with any excess of the related loan balance over the fair value less expected selling costs charged to the allowance for loan losses. Subsequent changes in value are reported as adjustments to the carrying amount and are recorded in other non-interest expense. Gains and losses upon sale, if any, are also charged to other non-interest expense. Fair value is generally based on third party appraisals and internal estimates that are adjusted by a discount representing the estimated cost of sale and is therefore considered a Level 3 valuation.

The Company’s Managed Assets Division is primarily responsible for the valuation of Level 3 inputs for other real estate owned. At September 30, 2018, the Company had $28.3 million of other real estate owned classified as Level 3. The unobservable input applied to other real estate owned relates to the 10% reduction to the appraisal value representing the estimated cost of sale of the foreclosed property. A higher discount for the estimated cost of sale results in a decreased carrying value.

The valuation techniques and significant unobservable inputs used to measure both recurring and non-recurring Level 3 fair value measurements at September 30, 2018 were as follows:

(Dollars in thousands)	Fair Value		Valuation Methodology	Significant Unobservable Input	Range of Inputs	Weighted Average of Inputs	Impact to valuation from an increased or higher input value
Measured at fair value on a recurring basis:
Municipal Securities	$	97,586	Bond pricing	Equivalent rating	BBB-AA+	N/A	Increase
U.S. Government agencies	3,315		Bond pricing	Equivalent rating	AAA	AAA	Increase
Loans held-for-investment	13,456		Discounted cash flows	Discount rate	4%-5%	4.57%	Decrease
				Credit discount	0%-7%	1.00%	Decrease
				Constant prepayment rate (CPR)	10.31%	10.31%	Decrease
MSRs	74,530		Discounted cash flows	Discount rate	7%-18%	10.03%	Decrease
				Constant prepayment rate (CPR)	0%-81%	10.03%	Decrease
				Cost of servicing	$15-$200	$78	Decrease
				Cost of servicing - delinquent	$200-$1,000	$274	Decrease
Derivatives	2,492		Discounted cash flows	Pull-through rate	20%-100%	91.12%	Increase
Measured at fair value on a non-recurring basis:
Impaired loans—collateral based	$	106,219	Appraisal value	Appraisal adjustment - cost of sale	10%	10.00%	Decrease
Other real estate owned	28,303		Appraisal value	Appraisal adjustment - cost of sale	10%	10.00%	Decrease

The Company is required under applicable accounting guidance to report the fair value of all financial instruments on the consolidated statements of condition, including those financial instruments carried at cost. The table below presents the carrying amounts and estimated fair values of the Company’s financial instruments as of the dates shown:

	At September 30, 2018				At December 31, 2017				At September 30, 2017
	Carrying		Fair		Carrying		Fair		Carrying		Fair
(Dollars in thousands)	Value		Value		Value		Value		Value		Value
Financial Assets:
Cash and cash equivalents	$	279,993	$	279,993	$	277,591	$	277,591	$	251,952	$	251,952
Interest bearing deposits with banks	1,137,044		1,137,044		1,063,242		1,063,242		1,218,728		1,218,728
Available-for-sale securities	2,164,985		2,164,985		1,803,666		1,803,666		1,665,903		1,665,903
Held-to-maturity securities	966,438		911,597		826,449		812,516		819,340		807,036
Trading account securities	688		688		995		995		643		643
Equity securities with readily determinable fair value	36,414		36,414		—		—		—		—
FHLB and FRB stock, at cost	99,998		99,998		89,989		89,989		87,192		87,192
Brokerage customer receivables	15,649		15,649		26,431		26,431		23,631		23,631
Mortgage loans held-for-sale, at fair value	338,111		338,111		313,592		313,592		370,282		370,282
Loans held-for-investment, at fair value	77,883		77,883		33,717		33,717		29,704		29,704
Loans held-for-investment, at amortized cost	23,046,068		23,261,545		21,607,080		21,768,978		20,929,678		21,064,801
MSRs	74,530		74,530		33,676		33,676		29,414		29,414
Nonqualified deferred compensation assets	12,503		12,503		11,065		11,065		10,824		10,824
Derivative assets	96,153		96,153		52,069		52,069		48,198		48,198
Accrued interest receivable and other	254,879		254,879		227,649		227,649		225,435		225,435
Total financial assets	$	28,601,336	$	28,761,972	$	26,367,211	$	26,515,176	$	25,710,924	$	25,833,743
Financial Liabilities
Non-maturity deposits	$	19,456,677	$	19,456,677	$	18,775,977	$	18,775,977	$	18,228,388	$	18,228,388
Deposits with stated maturities	5,460,038		5,475,048		4,407,370		4,350,004		4,666,675		4,608,760
FHLB advances	615,000		615,342		559,663		544,750		468,962		454,753
Other borrowings	373,571		373,571		266,123		266,123		251,680		251,680
Subordinated notes	139,172		146,838		139,088		144,266		139,052		145,376
Junior subordinated debentures	253,566		258,488		253,566		264,696		253,566		240,305
Derivative liabilities	71,381		71,381		35,671		35,671		35,773		35,773
FDIC indemnification liability	—		—		—		—		15,472		15,472
Accrued interest payable	15,374		15,374		8,030		8,030		9,177		9,177
Total financial liabilities	$	26,384,779	$	26,412,719	$	24,445,488	$	24,389,517	$	24,068,745	$	23,989,684

Not all the financial instruments listed in the table above are subject to the disclosure provisions of ASC Topic 820, as certain assets and liabilities result in their carrying value approximating fair value. These include cash and cash equivalents, interest bearing deposits with banks, brokerage customer receivables, FHLB and FRB stock, FDIC indemnification liability, accrued interest receivable and accrued interest payable and non-maturity deposits.

The following methods and assumptions were used by the Company in estimating fair values of financial instruments that were not previously disclosed.

Held-to-maturity securities. Held-to-maturity securities include U.S. Government-sponsored agency securities and municipal bonds issued by various municipal government entities primarily located in the Chicago metropolitan area and southern Wisconsin. Fair values for held-to-maturity securities are typically based on prices obtained from independent pricing vendors. In accordance with ASC 820, the Company has categorized these held-to-maturity securities as a Level 2 fair value measurement. Fair values for certain other held-to-maturity securities are based on the bond pricing methodology discussed previously related to certain available-for-sale securities. In accordance with ASC 820, the Company has categorized these held-to-maturity securities as a Level 3 fair value measurement.

Loans held-for-investment, at amortized cost. Fair values are estimated for portfolios of loans with similar financial characteristics. Loans are analyzed by type such as commercial, residential real estate, etc. Each category is further segmented by interest rate type (fixed and variable) and term. For variable-rate loans that reprice frequently, estimated fair values are based on carrying values. The fair value of residential loans is based on secondary market sources for securities backed by similar loans, adjusted for differences in loan characteristics. The fair value for other fixed rate loans is estimated by discounting scheduled cash flows through the estimated maturity using estimated market discount rates that reflect credit and interest rate risks inherent in the loan. The primary impact of credit risk on the present value of the loan portfolio, however, was assessed through the use of the allowance for loan losses, which is believed to represent the current fair value of probable incurred losses for purposes of the fair value calculation. In accordance with ASC 820, the Company has categorized loans as a Level 3 fair value measurement.

Deposits with stated maturities. The fair value of certificates of deposit is based on the discounted value of contractual cash flows. The discount rate is estimated using the rates currently in effect for deposits of similar remaining maturities. In accordance with ASC 820, the Company has categorized deposits with stated maturities as a Level 3 fair value measurement.

FHLB advances. The fair value of FHLB advances is obtained from the FHLB which uses a discounted cash flow analysis based on current market rates of similar maturity debt securities to discount cash flows. In accordance with ASC 820, the Company has categorized FHLB advances as a Level 3 fair value measurement.

Subordinated notes. The fair value of the subordinated notes is based on a market price obtained from an independent pricing vendor. In accordance with ASC 820, the Company has categorized subordinated notes as a Level 2 fair value measurement.

Junior subordinated debentures. The fair value of the junior subordinated debentures is based on the discounted value of contractual cash flows. In accordance with ASC 820, the Company has categorized junior subordinated debentures as a Level 3 fair value measurement.

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Stock-Based Compensation Plans

9 Months Ended

Sep. 30, 2018

Share-based Compensation [Abstract]

Stock-Based Compensation Plans

Stock-Based Compensation Plans

In May 2015, the Company’s shareholders approved the 2015 Stock Incentive Plan (“the 2015 Plan”) which provides for the issuance of up to 5,485,000 shares of common stock. The 2015 Plan replaced the 2007 Stock Incentive Plan (“the 2007 Plan”) which replaced the 1997 Stock Incentive Plan (“the 1997 Plan”). The 2015 Plan, the 2007 Plan and the 1997 Plan are collectively referred to as “the Plans.” The 2015 Plan has substantially similar terms to the 2007 Plan and the 1997 Plan. Awards granted under the Plans for which common shares are not issued by reason of cancellation, forfeiture, lapse of such award or settlement of such award in cash, are again available under the 2015 Plan. All grants made after the approval of the 2015 Plan are made pursuant to the 2015 Plan. As of September 30, 2018, approximately 3.4 million shares were available for future grants assuming the maximum number of shares are issued for the performance awards outstanding. The Plans cover substantially all employees of Wintrust. The Compensation Committee of the Board of Directors administers all stock-based compensation programs and authorizes all awards granted pursuant to the Plans.

The Plans permit the grant of incentive stock options, non-qualified stock options, stock appreciation rights, stock awards, restricted share or unit awards, performance awards and other incentive awards valued in whole or in part by reference to the Company’s common stock, all on a stand alone, combination or tandem basis. The Company historically awarded stock-based compensation in the form of time-vested non-qualified stock options and time-vested restricted share unit awards (“restricted shares”). The grants of options provide for the purchase of shares of the Company’s common stock at the fair market value of the stock on the date the options are granted. Stock options generally vest ratably over periods of three to five years and have a maximum term of seven years from the date of grant. Restricted shares entitle the holders to receive, at no cost, shares of the Company’s common stock. Restricted shares generally vest over periods of one to five years from the date of grant.

Beginning in 2011, the Company has awarded annual grants under the Long-Term Incentive Program (“LTIP”), which is administered under the Plans. The LTIP is designed in part to align the interests of management with the interests of shareholders, foster retention, create a long-term focus based on sustainable results and provide participants with a target long-term incentive opportunity. It is anticipated that LTIP awards will continue to be granted annually. LTIP grants generally consist of a combination of time-vested non-qualified stock options, performance-based stock awards and performance-based cash awards. Performance-based stock and cash awards granted under the LTIP are contingent upon the achievement of pre-established long-term performance goals set in advance by the Compensation Committee over a three-year period starting at the beginning of each calendar year. These performance awards are granted at a target level, and based on the Company’s achievement of the pre-established long-term goals, the actual payouts can range from 0% to a maximum of 150% (for awards granted after 2014) or 200% (for awards granted prior to 2015) of the target award. The awards vest in the quarter after the end of the performance period upon certification of the payout by the Compensation Committee of the Board of Directors. Holders of performance-based stock awards are entitled to receive, at no cost, the shares earned based on the achievement of the pre-established long-term goals.

Holders of restricted share awards and performance-based stock awards received under the Plans are not entitled to vote or receive cash dividends (or cash payments equal to the cash dividends) on the underlying common shares until the awards are vested and issued. Shares that are vested but not issuable pursuant to deferred compensation arrangements accrue additional shares based on the value of dividends otherwise paid. Except in limited circumstances, these awards are canceled upon termination of employment without any payment of consideration by the Company.

Stock-based compensation is measured as the fair value of an award on the date of grant, and the measured cost is recognized over the period which the recipient is required to provide service in exchange for the award. The fair values of restricted share and performance-based stock awards are determined based on the average of the high and low trading prices on the grant date, and the fair value of stock options is estimated using a Black-Scholes option-pricing model that utilizes various assumptions. Option-pricing models require the input of highly subjective assumptions and are sensitive to changes in the option's expected life and the price volatility of the underlying stock, which can materially affect the fair value estimate. Options granted since the inception of the LTIP in 2011 were primarily granted as LTIP awards. Expected life of options granted since the inception of the LTIP awards has been based on the safe harbor rule of the SEC Staff Accounting Bulletin No. 107 “Share-Based Payment” as the Company believes historical exercise data may not provide a reasonable basis to estimate the expected term of these options. Expected stock price volatility is based on historical volatility of the Company's common stock, which correlates with the expected life of the options, and the risk-free interest rate is based on comparable U.S. Treasury rates. Management reviews and adjusts the assumptions used to calculate the fair value of an option on a periodic basis to better reflect expected trends. No options were granted in the nine month periods ended September 30, 2018 and September 30, 2017.

Stock based compensation is recognized based upon the number of awards that are ultimately expected to vest, taking into account expected forfeitures. In addition, for performance-based awards, an estimate is made of the number of shares expected to vest as a result of actual performance against the performance criteria in the award to determine the amount of compensation expense to recognize. The estimate is reevaluated periodically and total compensation expense is adjusted for any change in estimate in the current period. Stock-based compensation expense recognized in the Consolidated Statements of Income was $3.2 million in the third quarter of 2018 and $2.4 million in the third quarter of 2017, and $10.3 million and $8.2 million for the 2018 and 2017

year-to-date periods, respectively.

A summary of the Company's stock option activity for the nine months endedSeptember 30, 2018 and September 30, 2017 is presented below:

Stock Options	Common Shares		Weighted Average Strike Price		Remaining Contractual Term(1)	Intrinsic Value (2) ($000)
Outstanding at January 1, 2018	1,084,756		$	41.98
Granted	—		—
Exercised	(271,674	)	41.36
Forfeited or canceled	(6,942	)	39.81
Outstanding at September 30, 2018	806,140		$	42.20	3.3	$	34,452
Exercisable at September 30, 2018	609,752		$	42.42	3.0	$	25,924

Stock Options	Common Shares		Weighted Average Strike Price		Remaining Contractual Term (1)	Intrinsic Value (2) ($000)
Outstanding at January 1, 2017	1,698,912		$	41.50
Granted	—		—
Exercised	(499,222	)	40.57
Forfeited or canceled	(16,378	)	43.07
Outstanding at September 30, 2017	1,183,312		$	41.87	4.2	$	43,122
Exercisable at September 30, 2017	640,759		$	41.58	3.5	$	23,532

(1) Represents the remaining weighted average contractual life in years.

(2) Aggregate intrinsic value represents the total pre-tax intrinsic value (i.e., the difference between the Company's stock price on the last trading day of the quarter and the option exercise price, multiplied by the number of shares) that would have been received by the option holders if they had exercised their options on the last day of the quarter. Options with exercise prices above the stock price on the last trading day of the quarter are excluded from the calculation of intrinsic value. The intrinsic value will change based on the fair market value of the Company's stock.

The aggregate intrinsic value of options exercised during the nine months ended September 30, 2018 and September 30, 2017, was $12.9 million and $16.3 million, respectively. Cash received from option exercises under the Plan for the nine months ended September 30, 2018 and September 30, 2017 was $11.2 million and $20.3 million, respectively.

A summary of the Plans' restricted share activity for the nine months endedSeptember 30, 2018 and September 30, 2017 is presented below:

	Nine months ended September 30, 2018				Nine months ended September 30, 2017
Restricted Shares	Common Shares		Weighted Average Grant-Date Fair Value		Common Shares		Weighted Average Grant-Date Fair Value
Outstanding at January 1	127,787		$	53.33	133,425		$	49.94
Granted	28,506		87.65		14,249		72.53
Vested and issued	(10,438	)	56.88		(10,695	)	46.03
Forfeited or canceled	(982	)	55.39		(2,551	)	52.26
Outstanding at September 30	144,873		$	59.82	134,428		$	52.60
Vested, but not issuable at September 30	90,294		$	51.88	89,563		$	51.59

A summary of the Plans' performance-based stock award activity, based on the target level of the awards, for the nine months endedSeptember 30, 2018 and September 30, 2017 is presented below:

	Nine months ended September 30, 2018				Nine months ended September 30, 2017
Performance-based Stock	Common Shares		Weighted Average Grant-Date Fair Value		Common Shares		Weighted Average Grant-Date Fair Value
Outstanding at January 1	359,196		$	54.37	298,180		$	43.64
Granted	134,326		88.28		145,829		72.60
Vested and issued	(82,307	)	44.39		(68,712	)	46.85
Forfeited	(13,582	)	59.18		(14,164	)	52.81
Outstanding at September 30	397,633		$	67.72	361,133		$	54.36
Vested, but deferred at September 30	21,477		$	43.52	13,616		$	42.66

The Company issues new shares to satisfy its obligation to issue shares granted pursuant to the Plans.

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Shareholders' Equity and Earnings Per Share

9 Months Ended

Sep. 30, 2018

Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract]

Shareholders' Equity and Earnings Per Share

Shareholders’ Equity and Earnings Per Share

Series D Preferred Stock

In June 2015, the Company issued and sold 5,000,000 shares of fixed-to-floating non-cumulative perpetual preferred stock, Series D, liquidation preference $25 per share (the “Series D Preferred Stock”) for $125.0 million in a public offering. When, as and if declared, dividends on the Series D Preferred Stock are payable quarterly in arrears at a fixed rate of 6.50% per annum from the original issuance date to, but excluding, July 15, 2025, and from (and including) that date at a floating rate equal to three-month LIBOR plus a spread of 4.06% per annum.

Series C Preferred Stock

In March 2012, the Company issued and sold 126,500 shares of non-cumulative perpetual convertible preferred stock, Series C, liquidation preference $1,000 per share (the “Series C Preferred Stock”) for $126.5 million in a public offering. When, as and if declared, dividends on the Series C Preferred Stock were payable quarterly in arrears at a rate of 5.00% per annum. The Series C Preferred Stock was convertible into common stock at the option of the holder subject to customary anti-dilution adjustments. Additionally, on and after April 15, 2017, the Company had the right under certain circumstances to cause the Series C Preferred Stock to be converted into common stock if the closing price of the Company’s common stock exceeded a certain amount. On April 25, 2017, 2,073 shares of the Series C Preferred Stock were converted at the option of the respective holder into 51,244 shares of the Company's common stock, pursuant to the terms of the Series C Preferred Stock. On April 27, 2017, the Company caused a mandatory conversion of its remaining 124,184 shares of Series C Preferred Stock into 3,069,828 shares of the Company's common stock at a conversion rate of 24.72 shares of common stock per share of Series C Preferred Stock. Cash was paid in lieu of fractional shares for an amount considered insignificant.

Common Stock Warrant

Pursuant to the U.S. Department of the Treasury’s (the “U.S. Treasury”) Capital Purchase Program, on December 19, 2008, the Company issued to the U.S. Treasury a warrant to exercise 1,643,295 warrant shares of Wintrust common stock with a term of 10 years. The exercise price, subject to customary anti-dilution, was $22.57 at September 30, 2018. In February 2011, the U.S. Treasury sold all of its interest in the warrant issued to it in a secondary underwritten public offering. During the first nine months of 201815,951 warrant shares were exercised, which resulted in 11,764 shares of common stock issued. At September 30, 2018, all remaining holders of the interest in the warrant were able to exercise 7,410 warrant shares.

Other

At the January 2018 Board of Directors meeting, a quarterly cash dividend of $0.19 per share ($0.76 on an annualized basis) was declared. It was paid on February 22, 2018 to shareholders of record as of February 8, 2018. At the April 2018 Board of Directors meeting, a quarterly cash dividend of $0.19 per share ($0.76 on an annualized basis) was declared. It was paid on May 24, 2018 to shareholders of record as of May 10, 2018. At the July 2018 Board of Directors meeting, a quarterly cash dividend of $0.19 per share ($0.76 on an annualized basis) was declared. It was paid on August 23, 2018 to shareholders of record as of August 9, 2018.

Accumulated Other Comprehensive Income (Loss)

The following tables summarize the components of other comprehensive income (loss), including the related income tax effects, and the related amount reclassified to net income for the periods presented (in thousands).

	Accumulated Unrealized Losses on Securities			Accumulated Unrealized Gains on Derivative Instruments			Accumulated Foreign Currency Translation Adjustments			Total Accumulated Other Comprehensive Loss
Balance at July 1, 2018	$	(54,885	)	$	11,748		$	(38,079	)	$	(81,216	)
Other comprehensive (loss) income during the period, net of tax, before reclassifications	(13,277		)	1,851			1,942			(9,484		)
Amount reclassified from accumulated other comprehensive loss into net income, net of tax	(730		)	(1,696		)	—			(2,426		)
Amount reclassified from accumulated other comprehensive loss related to amortization of unrealized losses on investment securities transferred to held-to-maturity from available-for-sale, net of tax	(24		)	—			—			(24		)
Net other comprehensive (loss) income during the period, net of tax	$	(14,031	)	$	155		$	1,942		$	(11,934	)
Balance at September 30, 2018	$	(68,916	)	$	11,903		$	(36,137	)	$	(93,150	)
Balance at January 1, 2018	$	(15,813	)	$	7,164		$	(33,186	)	$	(41,835	)
Cumulative effect adjustment from the adoption of:
ASU 2016-01	(1,880		)	—			—			(1,880		)
ASU 2018-02	(4,517		)	1,543			—			(2,974		)
Other comprehensive (loss) income during the period, net of tax, before reclassifications	(46,665		)	6,368			(2,951		)	(43,248		)
Amount reclassified from accumulated other comprehensive income (loss) into net income, net of tax	(5		)	(3,172		)	—			(3,177		)
Amount reclassified from accumulated other comprehensive loss related to amortization of unrealized losses on investment securities transferred to held-to-maturity from available-for-sale, net of tax	(36		)	—			—			(36		)
Net other comprehensive (loss) income during the period, net of tax	$	(46,706	)	$	3,196		$	(2,951	)	$	(46,461	)
Balance at September 30, 2018	$	(68,916	)	$	11,903		$	(36,137	)	$	(93,150	)

	Accumulated Unrealized Losses on Securities			Accumulated Unrealized Gains on Derivative Instruments		Accumulated Foreign Currency Translation Adjustments			Total Accumulated Other Comprehensive Loss
Balance at July 1, 2017	$	(15,022	)	$	4,959	$	(36,474	)	$	(46,537	)
Other comprehensive income during the period, net of tax, before reclassifications	653			228		4,206			5,087
Amount reclassified from accumulated other comprehensive income into net income, net of tax	(24		)	8		—			(16		)
Amount reclassified from accumulated other comprehensive loss related to amortization of unrealized losses on investment securities transferred to held-to-maturity from available-for-sale, net of tax	(20		)	—		—			(20		)
Net other comprehensive income during the period, net of tax	$	609		$	236	$	4,206		$	5,051
Balance at September 30, 2017	$	(14,413	)	$	5,195	$	(32,268	)	$	(41,486	)
Balance at January 1, 2017	$	(29,309	)	$	4,165	$	(40,184	)	$	(65,328	)
Other comprehensive income during the period, net of tax, before reclassifications	15,815			393		7,916			24,124
Amount reclassified from accumulated other comprehensive income into net income, net of tax	(19		)	637		—			618
Amount reclassified from accumulated other comprehensive loss related to amortization of unrealized losses on investment securities transferred to held-to-maturity from available-for-sale, net of tax	(900		)	—		—			(900		)
Net other comprehensive income during the period, net of tax	$	14,896		$	1,030	$	7,916		$	23,842
Balance at September 30, 2017	$	(14,413	)	$	5,195	$	(32,268	)	$	(41,486	)

	Amount Reclassified from Accumulated Other Comprehensive Income for the
Details Regarding the Component of Accumulated Other Comprehensive Income	Three Months Ended						Nine Months Ended						Impacted Line on the Consolidated Statements of Income
	September 30,						September 30,
	2018			2017			2018			2017
Accumulated unrealized losses on securities
Gains included in net income	$	1,001		$	39		$	6		$	31		Gains (losses) on investment securities, net
	1,001			39			6			31			Income before taxes
Tax effect	$	(271	)	$	(15	)	$	(1	)	$	(12	)	Income tax expense
Net of tax	$	730		$	24		$	5		$	19		Net income
Accumulated unrealized losses on derivative instruments
Amount reclassified to interest expense on deposits	$	(2,319	)	$	(380	)	$	(4,338	)	$	(15	)	Interest on deposits
Amount reclassified to interest expense on junior subordinated debentures	—			394			—			1,066			Interest on junior subordinated debentures
	2,319			(14		)	4,338			(1,051		)	Income before taxes
Tax effect	$	(623	)	$	6		$	(1,166	)	$	414		Income tax expense
Net of tax	$	1,696		$	(8	)	$	3,172		$	(637	)	Net income

Earnings per Share

The following table shows the computation of basic and diluted earnings per share for the periods indicated:

		Three Months Ended				Nine Months Ended
(In thousands, except per share data)		September 30, 2018		September 30, 2017		September 30, 2018		September 30, 2017
Net income		$	91,948	$	65,626	$	263,509	$	188,901
Less: Preferred stock dividends		2,050		2,050		6,150		7,728
Net income applicable to common shares—Basic	(A)	89,898		63,576		257,359		181,173
Add: Dividends on convertible preferred stock, if dilutive		—		—		—		1,578
Net income applicable to common shares—Diluted	(B)	89,898		63,576		257,359		182,751
Weighted average common shares outstanding	(C)	56,366		55,796		56,268		54,292
Effect of dilutive potential common shares
Common stock equivalents		918		966		912		988
Convertible preferred stock, if dilutive		—		—		—		1,317
Total dilutive potential common shares		918		966		912		2,305
Weighted average common shares and effect of dilutive potential common shares	(D)	57,284		56,762		57,180		56,597
Net income per common share:
Basic	(A/C)	$	1.59	$	1.14	$	4.57	$	3.34
Diluted	(B/D)	$	1.57	$	1.12	$	4.50	$	3.23

Potentially dilutive common shares can result from stock options, restricted stock unit awards, stock warrants, the Company’s convertible preferred stock and shares to be issued under the Employee Stock Purchase Plan and the Directors Deferred Fee and Stock Plan, being treated as if they had been either exercised or issued, computed by application of the treasury stock method. While potentially dilutive common shares are typically included in the computation of diluted earnings per share, potentially dilutive common shares are excluded from this computation in periods in which the effect would reduce the loss per share or increase the income per share. For diluted earnings per share, net income applicable to common shares can be affected by the conversion of the Company’s convertible preferred stock. Where the effect of this conversion would reduce the loss per share or increase the income per share for a period, net income applicable to common shares is not adjusted by the associated preferred dividends.

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Basis of Presentation (Policies)

9 Months Ended

Sep. 30, 2018

Accounting Policies [Abstract]

Basis of Accounting

The consolidated financial statements of Wintrust Financial Corporation and Subsidiaries (“Wintrust” or the “Company”) presented herein are unaudited, but in the opinion of management reflect all necessary adjustments of a normal or recurring nature for a fair presentation of results as of the dates and for the periods covered by the consolidated financial statements.

The accompanying consolidated financial statements are unaudited and do not include information or footnotes necessary for a complete presentation of financial condition, results of operations or cash flows in accordance with U.S. generally accepted accounting principles ("GAAP"). The unaudited consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017 (“2017 Form 10-K”). Operating results reported for the period are not necessarily indicative of the results which may be expected for the entire year. Reclassifications of certain prior period amounts have been made to conform to the current period presentation.

The preparation of the financial statements requires management to make estimates, assumptions and judgments that affect the reported amounts of assets and liabilities. Management believes that the estimates made are reasonable, however, changes in estimates may be required if economic or other conditions develop differently from management’s expectations. Certain policies and accounting principles inherently have a greater reliance on the use of estimates, assumptions and judgments and as such have a greater possibility of producing results that could be materially different than originally reported. Management views critical accounting policies to be those which are highly dependent on subjective or complex judgments, estimates and assumptions, and where changes in those estimates and assumptions could have a significant impact on the financial statements. Management currently views the determination of the allowance for loan losses and the allowance for losses on lending-related commitments, loans acquired with evidence of credit quality deterioration since origination, estimations of fair value, the valuations required for impairment testing of goodwill, the valuation and accounting for derivative instruments and income taxes as the accounting areas that require the most subjective and complex judgments, and as such could be the most subject to revision as new information becomes available. Descriptions of the Company's significant accounting policies are included in Note 1 - “Summary of Significant Accounting Policies” of the 2017 Form 10-K.

Recent Accounting Developments

Revenue Recognition

In May 2014, the Financial Accounting Standards Board ("FASB") issued ASU No. 2014-09, which created “Revenue from Contracts with Customers (Topic 606),” to clarify the principles for recognizing revenue and develop a common revenue standard for customer contracts. This ASU provides guidance regarding how an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The ASU also added a new subtopic to the codification, ASC 340-40, “Other Assets and Deferred Costs: Contracts with Customers” to provide guidance on costs related to obtaining and fulfilling a customer contract. Furthermore, the new standard requires disclosure of sufficient information to enable users of financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. At the time ASU No. 2014-09 was issued, the guidance was effective for fiscal years beginning after December 15, 2016. In July 2015, the FASB approved a deferral of the effective date by one year, which resulted in the guidance becoming effective for the Company as of January 1, 2018.

The FASB continued to issue various updates to clarify and improve specific areas of ASU No. 2014-09. In March 2016, the FASB issued ASU No. 2016-08, “Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net),” to clarify the implementation guidance within ASU No. 2014-09 surrounding principal versus agent considerations and its impact on revenue recognition. In April 2016, the FASB issued ASU No. 2016-10, “Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing,” to also clarify the implementation guidance within ASU No. 2014-09 related to these two topics. In May 2016, the FASB issued ASU No. 2016-11, “Revenue Recognition (Topic 605) and Derivative and Hedging (Topic 815): Rescission of SEC Guidance Because of Accounting Standards Updates 2014-09 and 2014-16 Pursuant to Staff Announcements at the March 3, 2016 EITF Meeting,” to remove certain areas of SEC Staff Guidance from those specific Topics. In May 2016 and December 2016, the FASB issued ASU 2016-12, “Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients” and ASU 2016-20, “Technical Corrections and Improvements to Topic 606, Revenue from Contracts with Customers,” to clarify specific aspects of implementation, including the collectability criterion, exclusion of sales taxes collected from a transaction price, noncash consideration, contract modifications, completed contracts at transition, the applicability of loan guarantee fees, impairment of capitalized contract costs and certain disclosure requirements. In February 2017, the FASB issued ASU No. 2017-05, “Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets,” to clarify the implementation guidance within ASU No. 2014-09 surrounding transfers of nonfinancial assets, including partial sales of such assets, and its impact on revenue recognition. Like ASU No. 2014-09, this guidance became effective for the Company starting January 1, 2018.

The Company adopted ASU No. 2014-09 and all subsequent updates issued to clarify and improve specific areas of this ASU as of January 1, 2018. As certain significant revenue sources related to financial instruments such as interest income are considered not in-scope, the new guidance did not have a significant impact on the Company's consolidated financial statements. Revenue sources impacted by the new guidance include brokerage and trust and asset management fees from the wealth management business unit, card-based fees, deposit-related fees and other non-interest income. During implementation, the Company reviewed specific contracts with customers across these various sources of revenue. Reviews of such contracts assisted in identifying any characteristics of such contracts that could result in a change in the Company's current practices for recognition of revenue and recognition of costs incurred to obtain or fulfill such contracts. After review of such contracts, the Company identified no indication within the terms of such contracts that a significant change in the Company's current practices and accounting policies was necessary. The Company elected to adopt the new guidance using the modified retrospective approach applied to all contracts as of the date of initial application at January 1, 2018. Electing the modified retrospective approach resulted in no cumulative effect adjustment to the opening balance of retained earnings at the date of initial application. Additional disclosures have been added in accordance with the new guidance. See Note 13 – Revenue from Contracts with Customers for discussion of the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers.

Financial Instruments

In January 2016, the FASB issued ASU No. 2016-01, “Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities,” to improve the accounting for financial instruments. This ASU requires equity securities with readily determinable fair values to be measured at fair value with changes recognized in net income. Such equity securities with readily determinable fair values are no longer classified as available-for-sale securities or trading securities within the consolidated financial statements of an entity. For equity securities without a readily determinable fair value, the value of the equity securities may be elected to be measured at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer instead of fair value, unless a qualitative assessment indicates impairment. Additionally, this ASU requires the separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or the accompanying notes to the financial statements.

The Company adopted this guidance as of January 1, 2018. For equity securities with a readily determinable fair value, this guidance was applied under a modified retrospective approach with a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption. As of January 1, 2018, the Company reclassified approximately $1.9 million from accumulated other comprehensive income, related to previously recognized unrealized gains, net of deferred taxes, from equity securities with readily determinable fair values, to retained earnings. Equity securities with readily determinable fair values are now prospectively presented separate from available-for-sale securities and trading securities within the Company's Consolidated Statements of Condition. Additionally, for the nine months ended September 30, 2018, the Company recognized $456,000 of net unrealized gains from equity securities with readily determinable fair values directly to earnings. For equity securities without a readily determinable fair value, the Company elected to measure such investments at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer, unless a qualitative assessment indicates impairment, which was applied prospectively. Equity securities without readily determinable fair values are included within accrued interest receivable and other assets within the Company's Consolidated Statements of Condition. See Note 5 - Investment Securities for further discussion of equity securities with and without readily determinable fair values.

In January 2018, the FASB issued ASU No. 2018-03, “Technical Corrections and Improvements to Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities,” to clarify certain aspects of the guidance issued in ASU No. 2016-01, including aspects of equity securities without a readily determinable fair value. This guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years beginning after June 15, 2018. Early adoption is permitted. As these clarifications did not have a material impact on the Company's consolidated financial statements, the Company elected to early adopt this guidance as of January 1, 2018.

Leases

In February 2016, the FASB issued ASU No. 2016-02, “Leases (Topic 842),” to improve transparency and comparability across entities regarding leasing arrangements. This ASU requires the recognition of a separate lease liability representing the required discounted lease payments over the lease term and a separate lease asset representing the right to use the underlying asset during the same lease term. Further, this ASU provides clarification regarding the identification of certain components of contracts that would represent a lease as well as requires additional disclosures to the notes of the financial statements. Additionally, in January 2018, the FASB issued ASU No. 2018-01, "Leases (Topic 842): Land Easement Practical Expedient for Transition to Topic 842," to permit an entity to elect an optional practical expedient to not evaluate under Topic 842 land easements that exist or expired before the entity's adoption of Topic 842 and that were not previously accounted for as leases under existing accounting guidance. This guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, and is to be applied under a modified retrospective approach, including the option to apply certain practical expedients.

The FASB has continued to issue various updates to clarify and improve specific areas of ASU No. 2016-02. In July 2018, the FASB issued ASU No. 2018-10, “Codification Improvements to Topic 842, Leases,” to clarify the implementation guidance within ASU No. 2016-02 surrounding narrow aspects of Topic 842, including lessee reassessment of lease classifications, the rate implicit in a lease, lessor reassessment of lease terms and purchase options and variable lease payments that depend on an index or a rate. Also, in July 2018, the FASB issued ASU No. 2018-11, “Leases (Topic 842): Targeted Improvements,” to clarify the implementation guidance within ASU No. 2016-02 surrounding comparative period reporting requirements for initial adoption as well as separating lease and non-lease components in a contract and allocating consideration in the contract to the separate components. Like ASU No. 2016-02, this guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, and is to be applied under a modified retrospective approach.

The Company continues to evaluate the impact of adopting this new guidance on the consolidated financial statements. Excluding any impact from the clarification of contracts representing a lease, the Company expects to primarily recognize separate lease liabilities and right to use assets for the amounts related to certain facilities under operating lease agreements disclosed in Note 15 - Minimum Lease Commitments in the 2017 Form 10-K. Other leasing arrangements in which the Company expects to recognize separate lease liabilities and right to use assets include those related to the use of signage related to certain sponsorships and other agreements and certain automatic teller machines. The Company does not expect to significantly change operating lease agreements prior to adoption. The Company has established a committee consisting of individuals from various areas of the Company tasked with transitioning the Company to the new guidance requirements. The Company continues to review lease agreements related to certain assets as well as other agreements with components representing a lease across its various business units to determine the impact of adoption on the Company's consolidated financial statements. Additionally, the Company is reviewing methodologies for determining an appropriate discount rate for the measurement of separate lease liabilities and right of use assets. Current controls and processes are also being reviewed to determine any need for changes in response to the guidance.

Derivatives

In August 2017, the FASB issued ASU No. 2017-12, “Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities,” to improve the financial reporting of hedging relationships to better align the economic results of an entity’s risk management activities and disclosures within its financial statements. In addition, this ASU makes certain targeted improvements to simplify the application of the hedge accounting, including to derivative instruments as well as allow a one-time election to reclassify fixed-rate, prepayable debt securities from a held-to-maturity classification to an available-for-sale classification. This guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Guidance related to existing cash flow hedges and, if elected, fair value hedges is to be applied under a modified retrospective approach and guidance related to amended presentation and disclosures is to be applied under a prospective approach.

Early adoption is permitted as of the beginning of an annual period that has not been issued or made available for issuance. The Company elected to early adopt this guidance as of January 1, 2018. See Note 15 - Derivative Financial Instruments for further discussion of early adoption of this guidance. The impact of early adoption on the financial statements included the following:

• As allowed under the guidance, for certain existing derivative instruments designated as fair value hedges, the Company transitioned the measurement methodology for the related hedged item (loans) to be in accordance with the guidance without dedesignation of the hedging relationship. This resulted in a negative cumulative basis adjustment to loans of $116,000 with a corresponding adjustment to retained earnings.

• No fixed-rate, prepayable held-to-maturity securities were transferred to an available-for-sale classification.

• The entire change in the hedging instrument included in the assessment of hedge effectiveness of fair value hedges is presented in the same income statement line as the current impact of the effective portion of such hedge, or interest income and interest expense for interest rate hedging. The Company has previously recognized this ineffectiveness within non-interest income. For the first nine months of 2018, the Company recognized $55,000 of such change in interest income.

In October 2018, the FASB issued ASU No. 2018-16, “Derivatives and Hedging (Topic 815): Inclusion of the Secured Overnight Financing Rate (SOFR) Overnight Index Swap (OIS) Rate as a Benchmark Interest Rate for Hedge Accounting Purposes,” to permit the use of the OIS rate based on SOFR as a U.S. benchmark interest rate for hedge accounting purposes. This guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, and is to be applied prospectively for qualifying new or redesignated hedging relationships entered into on or after the date of adoption. Early adoption is permitted as the Company has early adopted ASU 2017-12 as discussed above.

Allowance for Credit Losses

In June 2016, the FASB issued ASU No. 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments,” to replace the current incurred loss methodology for recognizing credit losses, which delays recognition until it is probable a loss has been incurred, with a methodology that reflects an estimate of all expected credit losses and considers additional reasonable and supportable forecasted information when determining credit loss estimates. This impacts the calculation of an allowance for credit losses for all financial assets measured under the amortized cost basis, including held-to-maturity debt securities and PCI loans at the time of and subsequent to acquisition. Additionally, credit losses related to available-for-sale debt securities would be recorded through the allowance for credit losses and not as a direct adjustment to the amortized cost of the securities. This guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, and is to be applied under a modified retrospective approach.

The Company is currently evaluating the impact of adopting this new guidance on the consolidated financial statements as well as the impact on current systems and processes. Specifically, the Company has established a committee consisting of individuals from the various areas of the Company tasked with transitioning to the new requirements. At this time, the Company is finalizing potential accounting policy elections and potential modeling methodologies for estimating expected credit losses using reasonable and supportable forecast information. Additionally, the Company has identified certain historical data and system requirements and has selected platforms to build, store, execute and determine the financial impact. Current controls and processes are also being reviewed to determine any need for changes in response to the guidance.

Statement of Cash Flows

In August 2016, the FASB issued ASU No. 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (a consensus of the FASB Emerging Issues Task Force),” to clarify the presentation of specific types of cash flow receipts and payments, including the payment of debt prepayment or debt extinguishment costs, contingent consideration cash payments paid subsequent to the acquisition date and proceeds from settlement of BOLI policies. This guidance became effective as of January 1, 2018 and was applied under a retrospective approach resulting in additional disclosure, including cash payments made to settle contingent consideration liabilities recognized in prior business combinations.

In November 2016, the FASB issued ASU No. 2016-18 “Statement of Cash Flows (Topic 230): Restricted Cash (a consensus of the FASB Emerging Issues Task Force),” to clarify the classification and presentation of changes in restricted cash on the statement of cash flows. This guidance became effective as of January 1, 2018 and did not have a material impact on the Company.

Income Taxes

In October 2016, the FASB issued ASU No. 2016-16, “Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory,” to improve the accounting for intra-entity transfers of assets other than inventory. This ASU allows the recognition of current and deferred income taxes for such transfers prior to the subsequent sale of the transferred assets to an outside party. Initial recognition of current and deferred income taxes is currently prohibited for intra-entity transfers of assets other than inventory. This guidance became effective as of January 1, 2018 and did not have a material impact on the Company. 

The Tax Cuts and Jobs Act (the “Tax Act”) was enacted on December 22, 2017, and the Company recognized a provisional tax benefit of $7.6 million in 2017 to reflect the impact of the Tax Act, primarily reflecting estimated effects of a lower federal income tax rate on its net deferred tax liabilities and a transition tax due on the deferred earnings of the Company's Canadian subsidiary. Estimates were made in good faith and were subject to change as additional information and interpretive guidance regarding provisions of the Tax Act became available. Staff Accounting Bulletin 118 provides a measurement period, not to extend beyond one year from the date of enactment, during which a company may complete the accounting for the impacts of the Tax Act. During the three months ended September 30, 2018, the Company finalized the provisional amounts recorded for the year ended December 31, 2017 related to the Tax Cuts and Jobs Act and recorded an additional net tax benefit of $1.2 million.

Business Combinations

In January 2017, the FASB issued ASU No. 2017-01, “Business Combinations (Topic 805): Clarifying the Definition of a Business,” to improve such definition and, as a result, assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or as business combinations. The definition of a business impacts many areas of accounting including acquisitions, disposals, goodwill and consolidation. This guidance became effective as of January 1, 2018 and was applied under a prospective approach. See Note 3 - Business Combinations for further discussion of business combinations including the acquisition of Chicago Shore Corporation ("CSC") as well as the acquisition of certain assets and assumption of certain liabilities of the mortgage banking business of iFreedom Direct Corporation DBA Veterans First Mortgage ("Veterans First") during the current period.

Goodwill

In January 2017, the FASB issued ASU No. 2017-04, “Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment,” to simplify the subsequent measurement of goodwill. When the carrying amount of a reporting unit exceeds its fair value, an entity would no longer be required to determine goodwill impairment by assigning the fair value of a reporting unit to all of its assets and liabilities as if that reporting unit was acquired in a business combination. Goodwill impairment would be recognized according to the excess of the carrying amount of the reporting unit over the calculated fair value of such unit. This guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, and is to be applied under a prospective approach. The Company does not expect this guidance to have a material impact on the Company's consolidated financial statements.

Compensation

In March 2017, the FASB issued ASU No. 2017-07, “Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost,” to improve the presentation of net periodic pension cost and net periodic post-retirement benefit cost. An entity will be required to report the service cost component of such costs in the same line item or items as other compensation costs related to services rendered. Additionally, only the service cost component will be eligible for capitalization when applicable. This guidance became effective as of January 1, 2018 and was applied under a retrospective approach related to presentation of the service cost component and a prospective approach related to capitalization of such costs. Adoption of this guidance did not have a material impact on the Company's consolidated financial statements.

In May 2017, the FASB issued ASU No. 2017-09, “Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting,” to clarify when modification accounting is appropriate for changes to the terms and conditions of a share-based payment award. An entity will be required to account for such changes as a modification unless certain criteria is met. This guidance became effective as of January 1, 2018 and was applied under a prospective approach for awards modified on or after the adoption date. Adoption of this guidance did not have a material impact on the Company's consolidated financial statements.

Amortization of Premium on Certain Debt Securities

In March 2017, the FASB issued ASU No. 2017-08, “Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities,” to amend the amortization period for certain purchased callable debt securities held at a premium. The amortization period for such securities will be shortened to the earliest call date. This guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, and is to be applied under a modified retrospective approach. Early adoption is permitted as of the beginning of an annual period that has not been issued or made available for issuance. The Company did not early adopt this guidance as of January 1, 2018. The Company is currently evaluating the impact of adopting this new guidance on the consolidated financial statements.

Accumulated Other Comprehensive Income (Loss)

In February 2018, the FASB issued ASU No. 2018-02, “Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income,” to allow a reclassification from accumulated other comprehensive income to retained earnings related to the stranded tax effects within other comprehensive income resulting from the Federal income tax rate reduction in the Tax Act. This guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, and is to be applied either in the period of adoption or retrospectively to each period or periods in which the effect of the Tax Act is recognized.

Early adoption is permitted as of the beginning of an annual period that has not been issued or made available for issuance. The Company elected to early adopt this guidance as of January 1, 2018 and applied such reclassification in the current period (period of adoption). As of January 1, 2018, the Company reclassified a stranded credit of $3.0 million from accumulated other comprehensive income to retained earnings. The Company has a policy for releasing the income tax effects from accumulated other comprehensive income using an individual security approach.

Fair Value Measurement

In August 2018, the FASB issued ASU No. 2018-13, “Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirement for Fair Value Measurement,” to modify disclosure requirements on fair value measurements and inputs. This guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, and is to be applied prospectively or retrospectively depending upon the disclosure requirement. Early adoption is permitted.

FDIC-Assisted Transactions

FDIC-Assisted Transactions

From 2010 to 2012, the Company acquired the banking operations, including the acquisition of certain assets and the assumption of liabilities, of nine financial institutions in FDIC-assisted transactions. Loans comprised the majority of the assets acquired in nearly all of these FDIC-assisted transactions, of which eight such transactions were subject to loss sharing agreements with the FDIC whereby the FDIC agreed to reimburse the Company for 80% of losses incurred on the purchased loans, other real estate owned (“OREO”), and certain other assets. Additionally, clawback provisions within these loss share agreements with the FDIC required the Company to reimburse the FDIC for actual losses on covered assets that were lower than the original loss estimates agreed upon with the FDIC with respect of such assets in the loss share agreements. The Company refers to the loans subject to these loss sharing agreements as “covered loans” and uses the term “covered assets” to refer to covered loans, covered OREO and certain other covered assets during periods subject to such agreements.

As of dates subject to such agreements, the loans covered by the loss share agreements were classified and presented as covered loans and the estimated reimbursable losses were recorded as an FDIC indemnification asset or liability in the Consolidated Statements of Condition. The Company recorded the acquired assets and liabilities at their estimated fair values at the acquisition date. The fair value for loans reflected expected credit losses at the acquisition date. Therefore, the Company only recognized a provision for credit losses and charge-offs on the acquired loans for any further credit deterioration subsequent to the acquisition date. See Note 7 — Allowance for Loan Losses, Allowance for Losses on Lending-Related Commitments and Impaired Loans for further discussion of the allowance on covered loans.

The loss share agreements with the FDIC covered realized losses on loans, foreclosed real estate and certain other assets and required the Company to record loss share assets and liabilities that were measured separately from the loan portfolios because they were not contractually embedded in the loans and were not transferable with the loans had the Company chosen to dispose of them. Fair values at the acquisition dates were estimated based on projected cash flows available for loss share based on the credit adjustments estimated for each loan pool and the loss share percentages. The loss share assets and liabilities were recorded as FDIC indemnification assets and other liabilities, respectively, on the Consolidated Statements of Condition as of dates covered by loss share agreements. Subsequent to the acquisition date, reimbursements received from the FDIC for actual incurred losses reduced the FDIC indemnification assets. Reductions to expected losses, to the extent such reductions to expected losses were the result of an improvement to the actual or expected cash flows from the covered assets, also reduced the FDIC indemnification assets and, if necessary, increased any loss share liability when necessary reductions exceeded the current value of the FDIC indemnification assets. In accordance with the clawback provision noted above, the Company was required to reimburse the FDIC when actual losses were less than certain thresholds established for each loss share agreement. The balance of these estimated reimbursements in accordance with clawback provisions and any related amortization were adjusted periodically for changes in the expected losses on covered assets. On the Consolidated Statements of Condition as of dates subject to loss share agreements, estimated reimbursements from clawback provisions were recorded as a reduction to the FDIC indemnification asset or, if necessary, an increase to the loss share liability, which was included within accrued interest payable and other liabilities. In the second quarter of 2017, the Company recorded a $4.9 million reduction to the estimated loss share liability as a result of an adjustment related to such clawback provisions. Although these assets were contractual receivables from the FDIC and these liabilities were contractual payables to the FDIC, there were no contractual interest rates. Additional expected losses, to the extent such expected losses resulted in recognition of an allowance for covered loan losses, increased the FDIC indemnification asset or reduced the FDIC indemnification liability. The corresponding amortization was recorded as a component of non-interest income on the Consolidated Statements of Income during periods covered by loss share agreements.

PCI Loans

Purchased Credit Impaired ("PCI") Loans

Purchased loans acquired in a business combination are recorded at estimated fair value on their purchase date. For PCI loans, expected future cash flows at the purchase date in excess of the fair value of loans are recorded as interest income over the life of the loans if the timing and amount of the future cash flows is reasonably estimable (“accretable yield”). The difference between contractually required payments and the cash flows expected to be collected at acquisition is referred to as the non-accretable difference and represents probable losses in the portfolio.

In determining the acquisition date fair value of PCI loans, and in subsequent accounting, the Company aggregates these purchased loans into pools of loans by common risk characteristics, such as credit risk rating and loan type. Subsequent to the purchase date, increases in cash flows over those expected at the purchase date are recognized as interest income prospectively. Subsequent decreases to the expected cash flows will result in a provision for loan losses.

The Company purchased a portfolio of life insurance premium finance receivables in 2009. These purchased life insurance premium finance receivables are valued on an individual basis. If credit related conditions deteriorate, an allowance related to these loans will be established as part of the provision for credit losses.

Cash and Cash Equivalents

For purposes of the Consolidated Statements of Cash Flows, the Company considers cash and cash equivalents to include cash on hand, cash items in the process of collection, non-interest bearing amounts due from correspondent banks, federal funds sold and securities purchased under resale agreements with original maturities of three months or less. These items are included within the Company’s Consolidated Statements of Condition as cash and due from banks, and federal funds sold and securities purchased under resale agreements.

Investment Securities

The Company conducts a regular assessment of its available-for-sale and held-to-maturity investment securities to determine whether securities are other-than-temporarily impaired considering, among other factors, the nature of the securities, credit ratings or financial condition of the issuer, the extent and duration of the unrealized loss, expected cash flows, market conditions and the Company’s ability to hold the securities through the anticipated recovery period.

The Company does not consider available-for-sale and held-to-maturity securities with unrealized losses at September 30, 2018 to be other-than-temporarily impaired. The Company does not intend to sell these investments and it is more likely than not that the Company will not be required to sell these investments before recovery of the amortized cost bases, which may be the maturity dates of the securities. The unrealized losses within each category have occurred as a result of changes in interest rates, market spreads and market conditions subsequent to purchase. Securities with continuous unrealized losses existing for more than twelve months were primarily mortgage-backed securities and corporate notes.

Equity securities without readily determinable fair values are included as part of accrued interest receivable and other assets in the Company's Consolidated Statements of Condition. The Company recorded no upward adjustments on such securities in the third quarter of 2018 and $156,000 on a year-to-date basis, related to observable price changes in orderly transactions for the identical or a similar investment of the same issuer in accordance with the adoption of ASU No. 2016-01. No downward adjustments of equity securities without readily determinable fair values related to observable price changes in orderly transactions for the identical or a similar investment of the same issuer were recorded during the current periods. The Company monitors its equity investments without a readily determinable fair values to identify potential transactions that may indicate an observable price change requiring adjustment to its carrying amount.

During the three months ended September 30, 2018, the Company recorded $330,000 of impairment of equity securities without readily determinable fair values. On a year-to-date basis, the Company recorded impairment of equity securities without readily determinable fair values totaling $867,000. The Company conducts a quarterly assessment of its equity securities without a readily determinable fair values to determine whether impairment exists in such securities, considering, among other factors, the nature of the securities, financial condition of the issuer and expected future cash flows.

Finance, Loans and Leases Receivable

Certain premium finance receivables are recorded net of unearned income.

Receivables

These amounts are included within interest and fees on loans in the Consolidated Statements of Income.

Allowance and Nonperforming Loans, Allowance

As a result of this initial review by the Company’s Managed Asset Division, the credit risk rating is reviewed and a portion of the outstanding loan balance may be deemed uncollectible or an impairment reserve may be established. The Company’s impairment analysis utilizes an independent re-appraisal of the collateral (unless such a third-party evaluation is not possible due to the unique nature of the collateral, such as a closely-held business or thinly traded securities). In the case of commercial real estate collateral, an independent third party appraisal is ordered by the Company’s Real Estate Services Group to determine if there has been any change in the underlying collateral value. These independent appraisals are reviewed by the Real Estate Services Group and sometimes by independent third party valuation experts and may be adjusted depending upon market conditions.

Through the credit risk rating process, loans are reviewed to determine if they are performing in accordance with the original contractual terms. If the borrower has failed to comply with the original contractual terms, further action may be required by the Company, including a downgrade in the credit risk rating, movement to non-accrual status, a charge-off or the establishment of a specific impairment reserve. If a loan amount, or portion thereof, is determined to be uncollectible, the loan’s credit risk rating is immediately downgraded to an 8 or 9 and the uncollectible amount is charged-off. Any loan that has a partial charge-off continues to be assigned a credit risk rating of an 8 or 9 for the duration of time that a balance remains outstanding. The Company undertakes a thorough and ongoing analysis to determine if additional impairment and/or charge-offs are appropriate and to begin a workout plan for the credit to minimize actual losses.

If, based on current information and events, it is probable that the Company will be unable to collect all amounts due to it according to the contractual terms of the loan agreement, a specific impairment reserve is established. In determining the appropriate charge-off for collateral-dependent loans, the Company considers the results of appraisals for the associated collateral.

Loans and Leases Receivable, Nonperforming Loan and Lease

Non-performing loans include all non-accrual loans (8 and 9 risk ratings) as well as loans 90 days past due and still accruing interest, excluding PCI and covered loans. The remainder of the portfolio is considered performing under the contractual terms of the loan agreement.

Loans and Leases Receivable, Allowance for Loan Losses

In conjunction with FDIC-assisted transactions, the Company entered into loss share agreements with the FDIC. Additional expected losses, to the extent such expected losses resulted in the recognition of an allowance for loan losses, increased the FDIC loss share asset or reduced any FDIC loss share liability. The allowance for loan losses for loans acquired in FDIC-assisted transactions was determined without giving consideration to the amounts recoverable through loss share agreements (since the loss share agreements were separately accounted for and thus presented “gross” on the balance sheet). On the Consolidated Statements of Income, the provision for credit losses was reported net of changes in the amount recoverable under the loss share agreements. Reductions to expected losses, to the extent such reductions to expected losses were the result of an improvement to the actual or expected cash flows from the covered assets, reduced the FDIC loss share asset or increased any FDIC loss share liability. Additions to expected losses required an increase to the allowance for covered loan losses, and a corresponding increase to the FDIC loss share asset or reduction to any FDIC loss share liability.

Impaired Financing Receivable

These impaired loans require an allowance for loan losses because the estimated fair value of the loans or related collateral is less than the recorded investment in the loans.

Impaired loans are considered by the Company to be non-accrual loans, TDRs or loans with principal and/or interest at risk, even if theloan is current with all payments of principal and interest.

A loan is considered to be impaired when, based on current information and events, it is probable that the Company will be unable to collect all amounts due pursuant to the contractual terms of the loan agreement. A loan modified in a TDR is an impaired loan according to applicable accounting guidance. Impairment is measured by estimating the fair value of the loan based on the present value of expected cash flows, the market price of the loan, or the fair value of the underlying collateral. Impaired loans are considered a fair value measurement where an allowance is established based on the fair value of collateral. Appraised values, which may require adjustments to market-based valuation inputs, are generally used on real estate collateral-dependent impaired loans.

Loans and Leases Receivable, Troubled Debt Restructuring

The Company’s approach to restructuring loans, excluding PCI loans, is built on its credit risk rating system which requires credit management personnel to assign a credit risk rating to each loan. In each case, the loan officer is responsible for recommending a credit risk rating for each loan and ensuring the credit risk ratings are appropriate. These credit risk ratings are then reviewed and approved by the bank’s chief credit officer and/or concurrence credit officer. Credit risk ratings are determined by evaluating a number of factors including a borrower’s financial strength, cash flow coverage, collateral protection and guarantees. The Company’s credit risk rating scale is one through ten with higher scores indicating higher risk. In the case of loans rated six or worse following modification, the Company’s Managed Assets Division evaluates the loan and the credit risk rating and determines that the loan has been restructured to be reasonably assured of repayment and of performance according to the modified terms and is supported by a current, well-documented credit assessment of the borrower’s financial condition and prospects for repayment under the revised terms.

A modification of a loan, excluding PCI loans, with an existing credit risk rating of 6 or worse or a modification of any other credit, which will result in a restructured credit risk rating of six or worse, must be reviewed for possible TDR classification. In that event, our Managed Assets Division conducts an overall credit and collateral review. A modification of these loans is considered to be a TDR if both (1) the borrower is experiencing financial difficulty and (2) for economic or legal reasons, the bank grants a concession to a borrower that it would not otherwise consider. The modification of a loan, excluding PCI loans, where the credit risk rating is 5 or better both before and after such modification is not considered to be a TDR. Based on the Company’s credit risk rating system, it considers that borrowers whose credit risk rating is 5 or better are not experiencing financial difficulties and therefore, are not considered TDRs.

All credits determined to be a TDR will continue to be classified as a TDR in all subsequent periods, unless the borrower has been in compliance with the loan’s modified terms for a period of six months (including over a calendar year-end) and the current interest rate represents a market rate at the time of restructuring. The Managed Assets Division, in consultation with the respective loan officer, determines whether the modified interest rate represented a current market rate at the time of restructuring. Using knowledge of current market conditions and rates, competitive pricing on recent loan originations, and an assessment of various characteristics of the modified loan (including collateral position and payment history), an appropriate market rate for a new borrower with similar risk is determined. If the modified interest rate meets or exceeds this market rate for a new borrower with similar risk, the modified interest rate represents a market rate at the time of restructuring. Additionally, before removing a loan from TDR classification, a review of the current or previously measured impairment on the loan and any concerns related to future performance by the borrower is conducted. If concerns exist about the future ability of the borrower to meet its obligations under the loans based on a credit review by the Managed Assets Division, the TDR classification is not removed from the loan.

TDRs are reviewed at the time of the modification and on a quarterly basis to determine if a specific reserve is necessary. The carrying amount of the loan is compared to the expected payments to be received, discounted at the loan's original rate, or for collateral dependent loans, to the fair value of the collateral. Any shortfall is recorded as a specific reserve. The Company, in accordance with ASC 310-10, continues to individually measure impairment of these loans after the TDR classification is removed.

Each TDR was reviewed for impairment at September 30, 2018 and approximately $3.9 million of impairment was present and appropriately reserved for through the Company’s normal reserving methodology in the Company’s allowance for loan losses. For TDRs in which impairment is calculated by the present value of future cash flows, the Company records interest income representing the decrease in impairment resulting from the passage of time during the respective period, which differs from interest income from contractually required interest on these specific loans.  During the three months ended September 30, 2018 and 2017, the Company recorded $32,000 and $68,000, respectively, of interest income, which was reflected as a decrease in impairment. For the nine months endedSeptember 30, 2018 and 2017, the Company recorded $89,000 and $172,000, respectively, of interest income, which was reflected as a decrease in impairment.

TDRs may arise when, due to financial difficulties experienced by the borrower, the Company obtains through physical possession one or more collateral assets in satisfaction of all or part of an existing credit. Once possession is obtained, the Company reclassifies the appropriate portion of the remaining balance of the credit from loans to OREO, which is included within other assets in the Consolidated Statements of Condition. For any residential real estate property collateralizing a consumer mortgage loan, the Company is considered to possess the related collateral only if legal title is obtained upon completion of foreclosure, or the borrower conveys all interest in the residential real estate property to the Company through completion of a deed in lieu of foreclosure or similar legal agreement.

Goodwill

At June 30, 2018, the Company utilized a qualitative approach for its annual goodwill impairment test of the community banking segment and determined that it is not more likely than not that an impairment existed at that time. At December 31, 2017, the Company utilized a quantitative approach for its annual goodwill impairment tests of the specialty finance and wealth management segments and determined that no impairment existed at that time. At each reporting date between annual goodwill impairment tests, the Company considers potential indicators of impairment. As of September 30, 2018, the Company identified no such indicators of goodwill impairment within the community banking, specialty finance and wealth management segments.

Intangible Assets

The core deposit intangibles recognized in connection with prior bank acquisitions are amortized over a ten-year period on an accelerated basis. The customer list intangibles recognized in connection with the purchase of life insurance premium finance assets in 2009 are being amortized over an 18-year period on an accelerated basis while the customer list intangibles recognized in connection with prior acquisitions within the wealth management segment are being amortized over a ten-year period on a straight-line basis. Indefinite-lived intangible assets consist of certain trade and domain names recognized in connection with the Veterans First acquisition. As indefinite-lived intangible assets are not amortized, the Company assesses impairment on at least an annual basis.

Transfers and Servicing of Financial Assets, Servicing of Financial Assets

The Company recognizes MSR assets upon the sale of residential real estate loans to external third parties when it retains the obligation to service the loans and the servicing fee is more than adequate compensation. The initial recognition of MSR assets from loans sold with servicing retained and subsequent changes in fair value of all MSRs are recognized in mortgage banking revenue. MSRs are subject to changes in value from actual and expected prepayment of the underlying loans. The Company does not specifically hedge the value of its MSRs.

Fair values are determined by using a discounted cash flow model that incorporates the objective characteristics of the portfolio as well as subjective valuation parameters that purchasers of servicing would apply to such portfolios sold into the secondary market. The subjective factors include loan prepayment speeds, discount rates, servicing costs and other economic factors. The Company uses a third party to assist in the valuation of MSRs.

Offsetting Assets and Liabilities

The Company records securities sold under repurchase agreements at their gross value and does not offset positions on the Consolidated Statements of Condition.

Repurchase Agreements

Securities pledged for customer balances in sweep accounts and short-term borrowings from brokers are maintained under the Company’s control and consist of U.S. Government agency and mortgage-backed securities. These securities are included in the available-for-sale and held-to-maturity securities portfolios as reflected on the Company’s Consolidated Statements of Condition.

Debt

These transactions were not considered sales of receivables and, as such, related proceeds received are reflected on the Company’s Consolidated Statements of Condition as a secured borrowing owed to the unrelated third party, net of unamortized debt issuance costs, and translated to the Company’s reporting currency as of the respective date.

These notes are stated at par adjusted for unamortized costs paid related to the issuance of this debt.

The Term Facility is stated at par of the current outstanding balance of the debt adjusted for unamortized costs paid by the Company in relation to the debt issuance. The Company was contractually required to borrow the entire amount of the Term Facility on September 18, 2018 and all such borrowings must be repaid by September 18, 2023. Beginning December 31, 2018, the Company is required to make quarterly payments of principal plus interest on the Term Facility. At September 30, 2018, the Company had no outstanding balance under the Revolving Credit Facility. As no outstanding balance exists on the Revolving Credit Facility, unamortized costs paid by the Company in relation to the issuance of this debt are classified in other assets on the Consolidated Statements of Condition.

FHLB advances are stated at par value of the debt adjusted for unamortized prepayment fees paid at the time of prior restructurings of FHLB advances and unamortized fair value adjustments recorded in connection with advances acquired through acquisitions.

Transfers and Servicing of Financial Assets, Transfers of Financial Assets

The remaining $11.1 million within secured borrowings at September 30, 2018 represents other sold interests in certain loans by the Company that were not considered sales and, as such, related proceeds received are reflected on the Company’s Consolidated Statements of Condition as a secured borrowing owed to the various unrelated third parties.

Junior Subordinated Debentures

The Trusts are reported in the Company’s consolidated financial statements as unconsolidated subsidiaries. Accordingly, in the Consolidated Statements of Condition, the junior subordinated debentures issued by the Company to the Trusts are reported as liabilities and the common securities of the Trusts, all of which are owned by the Company, are included in investment securities.

Revenue Recognition

Contract liabilities represent upfront fees that the Company received at inception of certain contracts. The revenue recognized that was included in the contract liability balance at beginning of the period totaled $278,000 and $267,000 for the nine months ended September 30, 2018 and 2017, respectively. Receivables are recognized in the period the Company provides services when the Company's right to consideration is unconditional. Card related fee receivable is the result of volume based fee that the Company receives from a customer on an annual basis in the second quarter of each year. Payment terms on other invoiced amounts are typically 30 days or less. Contract liabilities and receivables from contracts with customers are included within the accrued interest payable and other liabilities and accrued interest receivable and other assets line items, respectively, in the Consolidated Statements of Condition.

Practical Expedients and Exemptions

The Company does not adjust the promised amount of consideration for the effects of a significant financing component if the Company expects, at contract inception, that the period between when the Company transfers a promised service to a customer and when the customer pays for that services is one year or less.

The Company recognizes the incremental costs of obtaining a contract as an expense when incurred if the amortization period of the asset that the entity otherwise would have recognized is one year or less.

Wealth Management Revenue

Wealth management revenue is comprised of brokerage and insurance product commissions, managed money fees and trust and asset management revenue of the Company's three wealth management subsidiaries: Wintrust Investments, Great Lakes Advisors, LLC ("GLA") and The Chicago Trust Company, N.A. ("CTC"). All wealth management revenue is recognized in the wealth management segment.

Brokerage and insurance product commissions consists primarily of commissions earned from trade execution services on behalf of customers and from selling mutual funds, insurance and other investment products to customers. For trade execution services, the Company recognizes commissions and receives payment from the brokerage customers at the point of transaction execution. Commissions received from the investment or insurance product providers are recognized at the point of sale of the product. The Company also receives trail and other commissions from providers for certain plans. These are generally based on qualifying account values and are recognized once the performance obligation, specific to each provider, is satisfied on a monthly, quarterly or annual basis.

Trust revenue is earned from trust and custody services that are generally performed over time. Revenue is determined periodically based on a schedule of fees applied to the value of each customer account using a time-elapsed method to measure progress toward complete satisfaction of the performance obligation. Fees are typically billed on a calendar month or quarter basis in advance or in arrears depending upon the contract. Additional fees earned for certain extraordinary services performed on behalf of the customers are recognized when the service has been performed.

Asset management revenue is earned from money management and advisory services that are performed over time. Revenue is based primarily on the market value of assets under management or administration using a time-elapsed method to measure progress toward complete satisfaction of the performance obligation. Fees are typically billed on a calendar month or quarter basis in advance or in arrears depending upon the contract. Certain programs provide the customer with an option of paying fees as a percentage of the account value or incurring commission charges for each trade similar to brokerage and insurance product commissions. Trade commissions and any other fees received for additional services are recognized at a point in time once the performance obligation is satisfied.

Mortgage Broker Fees

For customers desiring a mortgage product not currently offered by the Company, the Company may refer such customers and, with permission, direct such customers' applications to certain third party mortgage brokers. Mortgage broker fees are received from these brokers for such customer referrals upon settlement of the underlying mortgage. The Company's entitlement to the consideration is contingent on the settlement of the mortgage which is highly susceptible to factors outside of the Company's influence, such as third party broker's underwriting requirements. Also, the uncertainty surrounding the consideration could be resolved in varying lengths of time, dependent upon the third party brokers. Therefore, mortgage broker fees are recognized at the settlement of the underlying mortgage when the consideration is received. Broker fees are recognized in the community banking segment.

Service Charges on Deposit Accounts

Service charges on deposit accounts include fees charged to deposit customers for various services, including account analysis services, and are based on factors such as the size and type of customer, type of product and number of transactions. The fees are based on a standard schedule of fees and, depending on the nature of the service performed, the service is performed at a point in time or over a period of a month. When the service is performed at a point in time, the Company recognizes and receives revenue when the service has been performed. When the service is performed over a period of a month, the Company recognizes and receives revenue in the month the service has been performed. Service charges on deposit accounts are recognized in the community banking segment.

Administrative Services

Administrative services revenue is earned from providing outsourced administrative services, such as data processing of payrolls, billing and cash management services, to temporary staffing service clients located throughout the United States. Fees are charged periodically (typically a payroll cycle) and computed in accordance with the contractually determined rate applied to the total gross billings administered for the period. The revenue is recognized over the period using a time-elapsed method to measure progress toward complete satisfaction of the performance obligation. Other fees are charged on a per occurrence basis as the service is provided in the billing cycle. The Company has certain contracts with customers to perform outsourced administrative services and short-term accounts receivable financing. For these contracts, the total fee is allocated between the administrative services revenue and interest income during the client onboarding process based on the specific client and services provided. Administrative services revenue is recognized in the specialty finance segment.

Card and Deposit Related Fees

Card related fees include interchange and merchant revenue, and fees related to debit and credit cards. Interchange revenue is related to the Company issued debit cards. Other deposit related fees primarily include pay by phone processing fees, ATM and safe deposit box fees, check order charges and foreign currency related fees. Card and deposit related fees are generally based on volume of transactions and are recognized at the point in time when the service has been performed. For any consideration that is constrained, the revenue is recognized once the uncertainty is known. Upfront fees received from certain contracts are recognized on a straight line basis over the term of the contract. Card and deposit related fees are recognized in the community banking segment.

Segment Reporting

The Company’s operations consist of three primary segments: community banking, specialty finance and wealth management.

The three reportable segments are strategic business units that are separately managed as they offer different products and services and have different marketing strategies. In addition, each segment’s customer base has varying characteristics and each segment has a different regulatory environment. While the Company’s management monitors each of the fifteen bank subsidiaries’ operations and profitability separately, these subsidiaries have been aggregated into one reportable operating segment due to the similarities in products and services, customer base, operations, profitability measures, and economic characteristics.

For purposes of internal segment profitability, management allocates certain intersegment and parent company balances. Management allocates a portion of revenues to the specialty finance segment related to loans and leases originated by the specialty finance segment and sold or assigned to the community banking segment. Similarly, for purposes of analyzing the contribution from the wealth management segment, management allocates a portion of the net interest income earned by the community banking segment on deposit balances of customers of the wealth management segment to the wealth management segment. See Note 10 — Deposits, for more information on these deposits. Finally, expenses incurred at the Wintrust parent company are allocated to each segment based on each segment's risk-weighted assets.

The segment financial information provided in the following tables has been derived from the internal reporting system used by management to monitor and manage the financial performance of the Company. The accounting policies of the segments are substantially similar to those described in “Summary of Significant Accounting Policies” in Note 1 of the Company’s 2017 Form 10-K. The Company evaluates segment performance based on after-tax profit or loss and other appropriate profitability measures common to each segment.

Derivatives

Interest rate swaps designated as fair value hedges involve the payment of fixed amounts to a counterparty in exchange for the Company receiving variable payments over the life of the agreements without the exchange of the underlying notional amount.

Periodically, the Company will sell options to a bank or dealer for the right to purchase certain securities held within the banks’ investment portfolios (covered call options). These option transactions are designed primarily to mitigate overall interest rate risk and to increase the total return associated with the investment securities portfolio. These options do not qualify as accounting hedges pursuant to ASC 815, and, accordingly, changes in fair value of these contracts are recognized as other non-interest income.

The Company recognizes derivative financial instruments in the consolidated financial statements at fair value regardless of the purpose or intent for holding the instrument. The Company records derivative assets and derivative liabilities on the Consolidated Statements of Condition within accrued interest receivable and other assets and accrued interest payable and other liabilities, respectively. Changes in the fair value of derivative financial instruments are either recognized in income or in shareholders’ equity as a component of other comprehensive income depending on whether the derivative financial instrument qualifies for hedge accounting and, if so, whether it qualifies as a fair value hedge or cash flow hedge.

As of January 1, 2018, the Company elected to early adopt ASU No. 2017-12, “Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities.” Generally, changes in fair values of derivatives accounted for as fair value hedges are recorded in income in the same period and in the same income statement line as changes in the fair values of the hedged items that relate to the hedged risk(s). Changes in fair values of derivative financial instruments accounted for as cash flow hedges are recorded as a component of other comprehensive income, net of deferred taxes, and reclassified to earnings when the hedged transaction affects earnings. Changes in fair values of derivative financial instruments not designated in a hedging relationship pursuant to ASC 815 are reported in non-interest income during the period of the change. Derivative financial instruments are valued by a third party and are corroborated by comparison with valuations provided by the respective counterparties. Fair values of certain mortgage banking derivatives (interest rate lock commitments and forward commitments to sell mortgage loans) are estimated based on changes in mortgage interest rates from the date of the loan commitment. The fair value of foreign currency derivatives is computed based on changes in foreign currency rates stated in the contract compared to those prevailing at the measurement date.

For derivatives designated and that qualify as fair value hedges, the net gain or loss from the entire change in the fair value of the derivative instrument is recognized in the same income statement line item as the earnings effect, including the net gain or loss, of the hedged item (interest income earned on fixed rate loans) when the hedged item affects earnings.

When the relationship between the hedged item and hedging instrument is highly effective at achieving offsetting changes in cash flows attributable to the hedged risk, changes in the fair value of these cash flow hedges are recorded in accumulated other comprehensive income and are subsequently reclassified to interest expense as interest payments are made on such variable rate deposits. The changes in fair value (net of tax) are separately disclosed in the Consolidated Statements of Comprehensive Income.

The fair values of these derivatives were estimated based on changes in mortgage rates from the dates of the commitments. Changes in the fair value of these mortgage banking derivatives are included in mortgage banking revenue.

In most cases, the offsetting derivatives have mirror-image terms, which result in the positions’ changes in fair value substantially offsetting through earnings each period. However, to the extent that the derivatives are not a mirror-image and because of differences in counterparty credit risk, changes in fair value will not completely offset resulting in some earnings impact each period. Changes in the fair value of these derivatives are included in other non-interest income.

Changes in the fair value of derivatives not designated in hedging relationships are recorded directly in earnings.

Derivatives, Offsetting Fair Value Amounts

The Company records interest rate derivatives subject to master netting agreements at their gross value and does not offset derivative assets and liabilities on the Consolidated Statements of Condition.

Fair Value of Financial Instruments

The Company measures, monitors and discloses certain of its assets and liabilities on a fair value basis. These financial assets and financial liabilities are measured at fair value in three levels, based on the markets in which the assets and liabilities are traded and the observability of the inputs used to determine fair value. These levels are:

• Level 1—unadjusted quoted prices in active markets for identical assets or liabilities.

• Level 2—inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability or inputs that are derived principally from or corroborated by observable market data by correlation or other means.

• Level 3—significant unobservable inputs that reflect the Company’s own assumptions that market participants would use in pricing the assets or liabilities. Level 3 assets and liabilities include financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation.

A financial instrument’s categorization within the above valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the assets or liabilities. The following is a description of the valuation methodologies used for the Company’s assets and liabilities measured at fair value on a recurring basis.

Available-for-sale securities, trading account securities and equity securities with readily determinable fair value—Fair values for available-for-sale securities, trading account securities and equity securities with readily determinable fair value are typically based on prices obtained from independent pricing vendors. Securities measured with these valuation techniques are generally classified as Level 2 of the fair value hierarchy. Typically, standard inputs such as benchmark yields, reported trades for similar securities, issuer spreads, benchmark securities, bids, offers and reference data including market research publications are used to fair value a security. When these inputs are not available, broker/dealer quotes may be obtained by the vendor to determine the fair value of the security. We review the vendor’s pricing methodologies to determine if observable market information is being used, versus unobservable inputs. Fair value measurements using significant inputs that are unobservable in the market due to limited activity or a less liquid market are classified as Level 3 in the fair value hierarchy.

The Company’s Investment Operations Department is responsible for the valuation of Level 3 available-for-sale securities. The methodology and variables used as inputs in pricing Level 3 securities are derived from a combination of observable and unobservable inputs. The unobservable inputs are determined through internal assumptions that may vary from period to period due to external factors, such as market movement and credit rating adjustments.

At September 30, 2018, the Company classified $97.6 million of municipal securities as Level 3. These municipal securities are bond issues for various municipal government entities primarily located in the Chicago metropolitan area and southern Wisconsin and are privately placed, non-rated bonds without CUSIP numbers. The Company also classified $3.3 million of U.S. government agencies as Level 3 at September 30, 2018. The Company’s methodology for pricing these securities focuses on three distinct inputs: equivalent rating, yield and other pricing terms. To determine the rating for a given non-rated municipal bond, the Investment Operations Department references a rated, publicly issued bond by the same issuer if available. A reduction is then applied to the rating obtained from the comparable bond, as the Company believes if liquidated, a non-rated bond would be valued less than a similar bond with a verifiable rating. The reduction applied by the Company is one complete rating grade (i.e. a “AA” rating for a comparable bond would be reduced to “A” for the Company’s valuation). For bond issues without comparable bond proxies, a rating of "BBB" was assigned. In the third quarter of 2018, all of the ratings derived by the Investment Operations Department using the above process were "BBB" or better. The fair value measurement of municipal bonds is sensitive to the rating input, as a higher rating typically results in an increased valuation. The remaining pricing inputs used in the bond valuation are observable. Based on the rating determined in the above process, Investment Operations obtains a corresponding current market yield curve available to market participants. Other terms including coupon, maturity date, redemption price, number of coupon payments per year, and accrual method are obtained from the individual bond term sheets. Certain municipal bonds held by the Company at September 30, 2018 are continuously callable. When valuing these bonds, the fair value is capped at par value as the Company assumes a market participant would not pay more than par for a continuously callable bond. To determine the rating for the U.S. government agency securities, the Investment Operations Department assigned a AAA rating as it is guaranteed by the U.S. government.

Mortgage loans held-for-sale—The fair value of mortgage loans held-for-sale is determined by reference to investor price sheets for loan products with similar characteristics.

Loans held-for-investment—The fair value for loans in which the Company elected the fair value option is estimated by discounting future scheduled cash flows for the specific loan through maturity, adjusted for estimated credit losses and prepayments. The Company uses a discount rate based on the actual coupon rate of the underlying loan. At September 30, 2018, the Company classified $13.5 million of loans held-for-investment as Level 3. The weighted average discount rate used as an input to value these loans at September 30, 2018 was 4.57% with discount rates applied ranging from 4%-5%. The higher the rate utilized to discount estimated future cash flows, the lower the fair value measurement. As noted above, the fair value estimate also includes assumptions of prepayment speeds and credit losses. The Company included a prepayments speed assumption of 10.31% at September 30, 2018. Prepayment speeds are inversely related to the fair value of these loans as an increase in prepayment speeds results in a decreased valuation. Additionally, the weighted average credit discount used as an input to value the specific loans was 1.00% with credit loss discount ranging from 0%-7% at September 30, 2018.

MSRs—Fair value for MSRs is determined utilizing a valuation model which calculates the fair value of each servicing rights based on the present value of estimated future cash flows. The Company uses a discount rate commensurate with the risk associated with each servicing rights, given current market conditions. At September 30, 2018, the Company classified $74.5 million of MSRs as Level 3. The weighted average discount rate used as an input to value the pool of MSRs at September 30, 2018 was 10.03% with discount rates applied ranging from 7%-18%. The higher the rate utilized to discount estimated future cash flows, the lower the fair value measurement. The fair value of MSRs was also estimated based on other assumptions including prepayment speeds and the cost to service. Prepayment speeds used as an input to value the MSRs at September 30, 2018 ranged from 0%-81% or a weighted average prepayment speed of 10.03%. Further, for current and delinquent loans, the Company assumed a weighted average cost of servicing of $78 and $274, respectively, per loan. Prepayment speeds and the cost to service are both inversely related to the fair value of MSRs as an increase in prepayment speeds or the cost to service results in a decreased valuation. See Note 9 - Mortgage Servicing Rights (“MSRs”) for further discussion of MSRs.

Derivative instruments—The Company’s derivative instruments include interest rate swaps, caps and collars, commitments to fund mortgages for sale into the secondary market (interest rate locks), forward commitments to end investors for the sale of mortgage loans and foreign currency contracts. Interest rate swaps, caps and collars are valued by a third party, using models that primarily use market observable inputs, such as yield curves, and are validated by comparison with valuations provided by the respective counterparties. The credit risk associated with derivative financial instruments that are subject to master netting agreements is measured on a net basis by counterparty portfolio. The fair value for mortgage-related derivatives is based on changes in mortgage rates from the date of the commitments. The fair value of foreign currency derivatives is computed based on change in foreign currency rates stated in the contract compared to those prevailing at the measurement date.

At September 30, 2018, the Company classified $2.5 million of derivative assets related to interest rate locks as Level 3. The fair value of interest rate locks is based on prices obtained for loans with similar characteristics from third parties, adjusted for the pull-through rate, which represents the Company’s best estimate of the likelihood that a committed loan will ultimately fund. The weighted-average pull-through rate at September 30, 2018 was 91.12% with pull-through rates applied ranging from 20% to 100%. Pull-through rates are directly related to the fair value of interest rate locks as an increase in the pull-through rate results in an increased valuation.

Nonqualified deferred compensation assets—The underlying assets relating to the nonqualified deferred compensation plan are included in a trust and primarily consist of non-exchange traded institutional funds which are priced based by an independent third party service.

Foreclosed Assets

Other real estate owned is comprised of real estate acquired in partial or full satisfaction of loans and is included in other assets. Other real estate owned is recorded at its estimated fair value less estimated selling costs at the date of transfer, with any excess of the related loan balance over the fair value less expected selling costs charged to the allowance for loan losses. Subsequent changes in value are reported as adjustments to the carrying amount and are recorded in other non-interest expense. Gains and losses upon sale, if any, are also charged to other non-interest expense. Fair value is generally based on third party appraisals and internal estimates that are adjusted by a discount representing the estimated cost of sale and is therefore considered a Level 3 valuation.

Fair Value Measurement

Also, the Company may be required, from time to time, to measure certain other financial assets at fair value on a nonrecurring basis in accordance with GAAP. These adjustments to fair value usually result from impairment charges on individual assets.

The Company is required under applicable accounting guidance to report the fair value of all financial instruments on the consolidated statements of condition, including those financial instruments carried at cost.

The following methods and assumptions were used by the Company in estimating fair values of financial instruments that were not previously disclosed.

Held-to-maturity securities. Held-to-maturity securities include U.S. Government-sponsored agency securities and municipal bonds issued by various municipal government entities primarily located in the Chicago metropolitan area and southern Wisconsin. Fair values for held-to-maturity securities are typically based on prices obtained from independent pricing vendors. In accordance with ASC 820, the Company has categorized these held-to-maturity securities as a Level 2 fair value measurement. Fair values for certain other held-to-maturity securities are based on the bond pricing methodology discussed previously related to certain available-for-sale securities. In accordance with ASC 820, the Company has categorized these held-to-maturity securities as a Level 3 fair value measurement.

Loans held-for-investment, at amortized cost. Fair values are estimated for portfolios of loans with similar financial characteristics. Loans are analyzed by type such as commercial, residential real estate, etc. Each category is further segmented by interest rate type (fixed and variable) and term. For variable-rate loans that reprice frequently, estimated fair values are based on carrying values. The fair value of residential loans is based on secondary market sources for securities backed by similar loans, adjusted for differences in loan characteristics. The fair value for other fixed rate loans is estimated by discounting scheduled cash flows through the estimated maturity using estimated market discount rates that reflect credit and interest rate risks inherent in the loan. The primary impact of credit risk on the present value of the loan portfolio, however, was assessed through the use of the allowance for loan losses, which is believed to represent the current fair value of probable incurred losses for purposes of the fair value calculation. In accordance with ASC 820, the Company has categorized loans as a Level 3 fair value measurement.

Deposits with stated maturities. The fair value of certificates of deposit is based on the discounted value of contractual cash flows. The discount rate is estimated using the rates currently in effect for deposits of similar remaining maturities. In accordance with ASC 820, the Company has categorized deposits with stated maturities as a Level 3 fair value measurement.

FHLB advances. The fair value of FHLB advances is obtained from the FHLB which uses a discounted cash flow analysis based on current market rates of similar maturity debt securities to discount cash flows. In accordance with ASC 820, the Company has categorized FHLB advances as a Level 3 fair value measurement.

Subordinated notes. The fair value of the subordinated notes is based on a market price obtained from an independent pricing vendor. In accordance with ASC 820, the Company has categorized subordinated notes as a Level 2 fair value measurement.

Junior subordinated debentures. The fair value of the junior subordinated debentures is based on the discounted value of contractual cash flows. In accordance with ASC 820, the Company has categorized junior subordinated debentures as a Level 3 fair value measurement.

Stock-Based Compensation

Stock-based compensation is measured as the fair value of an award on the date of grant, and the measured cost is recognized over the period which the recipient is required to provide service in exchange for the award. The fair values of restricted share and performance-based stock awards are determined based on the average of the high and low trading prices on the grant date, and the fair value of stock options is estimated using a Black-Scholes option-pricing model that utilizes various assumptions. Option-pricing models require the input of highly subjective assumptions and are sensitive to changes in the option's expected life and the price volatility of the underlying stock, which can materially affect the fair value estimate. Options granted since the inception of the LTIP in 2011 were primarily granted as LTIP awards. Expected life of options granted since the inception of the LTIP awards has been based on the safe harbor rule of the SEC Staff Accounting Bulletin No. 107 “Share-Based Payment” as the Company believes historical exercise data may not provide a reasonable basis to estimate the expected term of these options. Expected stock price volatility is based on historical volatility of the Company's common stock, which correlates with the expected life of the options, and the risk-free interest rate is based on comparable U.S. Treasury rates. Management reviews and adjusts the assumptions used to calculate the fair value of an option on a periodic basis to better reflect expected trends.

Option and Incentive Plans

Stock based compensation is recognized based upon the number of awards that are ultimately expected to vest, taking into account expected forfeitures. In addition, for performance-based awards, an estimate is made of the number of shares expected to vest as a result of actual performance against the performance criteria in the award to determine the amount of compensation expense to recognize. The estimate is reevaluated periodically and total compensation expense is adjusted for any change in estimate in the current period.

Earnings Per Share

Potentially dilutive common shares can result from stock options, restricted stock unit awards, stock warrants, the Company’s convertible preferred stock and shares to be issued under the Employee Stock Purchase Plan and the Directors Deferred Fee and Stock Plan, being treated as if they had been either exercised or issued, computed by application of the treasury stock method. While potentially dilutive common shares are typically included in the computation of diluted earnings per share, potentially dilutive common shares are excluded from this computation in periods in which the effect would reduce the loss per share or increase the income per share. For diluted earnings per share, net income applicable to common shares can be affected by the conversion of the Company’s convertible preferred stock. Where the effect of this conversion would reduce the loss per share or increase the income per share for a period, net income applicable to common shares is not adjusted by the associated preferred dividends.

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Business Combinations (Tables)

9 Months Ended

Sep. 30, 2018

Business Combinations [Abstract]

Summary of FDIC Indemnification Liability

The following table summarizes the activity in the Company’s FDIC indemnification liability during the periods covered by loss share agreements indicated below:

	Three Months Ended			Nine Months Ended
(Dollars in thousands)	September 30, 2017			September 30, 2017
Balance at beginning of period	$	15,375		$	16,701
Reductions from reimbursable expenses	(159		)	(316		)
Amortization	311			1,010
Changes in expected reimbursements to the FDIC for changes in expected credit losses and reimbursable expenses	994			(1,665		)
Payments received from the FDIC	(1,049		)	(258		)
Balance at end of period	$	15,472		$	15,472

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Investment Securities (Tables)

9 Months Ended

Sep. 30, 2018

Available-for-sale Securities and Held-to-maturity Securities [Abstract]

Marketable Securities

The following tables are a summary of the investment securities portfolios as of the dates shown:

	September 30, 2018
(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available-for-sale securities
U.S. Treasury	$	125,153	$	—	$	(392	)	$	124,761
U.S. Government agencies	111,997		8		(985		)	111,020
Municipal	133,006		1,481		(1,114		)	133,373
Corporate notes:
Financial issuers	97,085		87		(4,719		)	92,453
Other	1,000		—		—			1,000
Mortgage-backed: (1)
Mortgage-backed securities	1,744,600		121		(87,950		)	1,656,771
Collateralized mortgage obligations	47,909		4		(2,306		)	45,607
Equity securities (2)	—		—		—			—
Total available-for-sale securities	$	2,260,750	$	1,701	$	(97,466	)	$	2,164,985
Held-to-maturity securities
U.S. Government agencies	$	713,423	$	—	$	(47,706	)	$	665,717
Municipal	253,015		629		(7,764		)	245,880
Total held-to-maturity securities	$	966,438	$	629	$	(55,470	)	$	911,597
Equity securities with readily determinable fair value (2)	$	33,512	$	4,206	$	(1,304	)	$	36,414

	December 31, 2017
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
(Dollars in thousands)
Available-for-sale securities
U.S. Treasury	$	144,904	$	—	$	(1,082	)	$	143,822
U.S. Government agencies	157,638		2		(725		)	156,915
Municipal	113,197		2,712		(557		)	115,352
Corporate notes:
Financial issuers	30,309		43		(301		)	30,051
Other	1,000		—		(1		)	999
Mortgage-backed: (1)
Mortgage-backed securities	1,291,695		446		(31,955		)	1,260,186
Collateralized mortgage obligations	60,092		64		(617		)	59,539
Equity securities (2)	34,234		3,357		(789		)	36,802
Total available-for-sale securities	$	1,833,069	$	6,624	$	(36,027	)	$	1,803,666
Held-to-maturity securities
U.S. Government agencies	$	579,062	$	23	$	(14,066	)	$	565,019
Municipal	247,387		2,668		(2,558		)	247,497
Total held-to-maturity securities	$	826,449	$	2,691	$	(16,624	)	$	812,516

(1) Consisting entirely of residential mortgage-backed securities, none of which are subprime.

(2) As a result of the adoption of ASU No. 2016-01 effective January 1, 2018, equity securities with readily determinable fair value are no longer presented within available-for-sale securities and are now presented as equity securities with readily determinable fair values in the Company's Consolidated Statements of Condition for the current period.

	September 30, 2017
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
(Dollars in thousands)
Available-for-sale securities
U.S. Treasury	$	144,872	$	—	$	(727	)	$	144,145
U.S. Government agencies	159,884		10		(566		)	159,328
Municipal	113,796		2,493		(273		)	116,016
Corporate notes:
Financial issuers	60,325		63		(771		)	59,617
Other	1,000		—		(3		)	997
Mortgage-backed: (1)
Mortgage-backed securities	1,114,655		1,477		(30,436		)	1,085,696
Collateralized mortgage obligations	63,934		230		(412		)	63,752
Equity securities (2)	33,166		3,867		(681		)	36,352
Total available-for-sale securities	$	1,691,632	$	8,140	$	(33,869	)	$	1,665,903
Held-to-maturity securities
U.S. Government agencies	$	585,061	$	249	$	(12,579	)	$	572,731
Municipal	234,279		2,185		(2,159		)	234,305
Total held-to-maturity securities	$	819,340	$	2,434	$	(14,738	)	$	807,036

(1) Consisting entirely of residential mortgage-backed securities, none of which are subprime.

(2) As a result of the adoption of ASU No. 2016-01 effective January 1, 2018, equity securities with readily determinable fair value are no longer presented within available-for-sale securities and are now presented as equity securities with readily determinable fair values in the Company's Consolidated Statements of Condition for the current period.

Investment Securities, Continuous Unrealized Loss Position, Fair Value

The following table presents the portion of the Company’s available-for-sale and held-to-maturity investment securities portfolios which has gross unrealized losses, reflecting the length of time that individual securities have been in a continuous unrealized loss position at September 30, 2018:

	Continuous unrealized losses existing for less than 12 months					Continuous unrealized losses existing for greater than 12 months					Total
(Dollars in thousands)	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Available-for-sale securities
U.S. Treasury	$	100,008	$	(131	)	$	24,753	$	(261	)	$	124,761	$	(392	)
U.S. Government agencies	37,672		(914		)	70,032		(71		)	107,704		(985		)
Municipal	38,774		(553		)	20,489		(561		)	59,263		(1,114		)
Corporate notes:
Financial issuers	68,639		(4,475		)	3,730		(244		)	72,369		(4,719		)
Other	—		—			—		—			—		—
Mortgage-backed:
Mortgage-backed securities	573,401		(14,706		)	1,079,068		(73,244		)	1,652,469		(87,950		)
Collateralized mortgage obligations	22,524		(1,228		)	22,671		(1,078		)	45,195		(2,306		)
Total available-for-sale securities	$	841,018	$	(22,007	)	$	1,220,743	$	(75,459	)	$	2,061,761	$	(97,466	)
Held-to-maturity securities
U.S. Government agencies	$	298,736	$	(12,317	)	$	366,981	$	(35,389	)	$	665,717	$	(47,706	)
Municipal	146,750		(3,854		)	83,874		(3,910		)	230,624		(7,764		)
Total held-to-maturity securities	$	445,486	$	(16,171	)	$	450,855	$	(39,299	)	$	896,341	$	(55,470	)

Schedule of Gross Gains and Losses on Investment Securities

The following table provides information as to the amount of gross gains and losses, adjustments and impairment on investment securities and proceeds received through the sale or call of investment securities:

	Three months ended September 30,						Nine months ended September 30,
(Dollars in thousands)	2018			2017			2018			2017
Realized gains on investment securities	$	1,051		$	58		$	1,057		$	106
Realized losses on investment securities	(50		)	(19		)	(1,051		)	(75		)
Net realized gains on investment securities	1,001			$	39		6			$	31
Unrealized gains on equity securities with readily determinable fair value	530			—			2,632			—
Unrealized losses on equity securities with readily determinable fair value	(1,111		)	—			(2,176		)	—
Net unrealized (losses) gains on equity securities with readily determinable fair value	(581		)	—			456			—
Upward adjustments of equity securities without readily determinable fair values	—			—			156			—
Downward adjustments of equity securities without readily determinable fair values	—			—			—			—
Impairment of equity securities without readily determinable fair values	(330		)	—			(867		)	—
Adjustment and impairment, net, of equity securities without readily determinable fair values	(330		)	—			(711		)	—
Other than temporary impairment charges	—			—			—			—
Gains (losses) on investment securities, net	$	90		$	39		$	(249	)	$	31
Proceeds from sales of available-for-sale securities	$	649		$	133,089		$	209,640		$	121,795
Proceeds from sales of equity securities with readily determinable fair value	1,895			—			1,895			—
Proceeds from sales and capital distributions of equity securities without readily determinable fair value	64			—			680			—

Investments Classified by Contractual Maturity Date

The amortized cost and fair value of available-for-sale and held-to-maturity investment securities as of September 30, 2018, December 31, 2017 and September 30, 2017, by contractual maturity, are shown in the following table. Contractual maturities may differ from actual maturities as borrowers may have the right to call or repay obligations with or without call or prepayment penalties. Mortgage-backed securities are not included in the maturity categories in the following maturity summary as actual maturities may differ from contractual maturities because the underlying mortgages may be called or prepaid without penalties:

	September 30, 2018				December 31, 2017				September 30, 2017
(Dollars in thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value		Amortized Cost		Fair Value
Available-for-sale securities
Due in one year or less	$	128,184	$	127,844	$	300,833	$	299,285	$	150,907	$	150,241
Due in one to five years	174,968		174,877		97,019		97,326		282,443		282,121
Due in five to ten years	118,229		113,875		33,947		35,029		38,339		39,458
Due after ten years	46,860		46,011		15,249		15,499		8,188		8,283
Mortgage-backed	1,792,509		1,702,378		1,351,787		1,319,725		1,178,589		1,149,448
Equity securities (1)	—		—		34,234		36,802		33,166		36,352
Total available-for-sale securities	$	2,260,750	$	2,164,985	$	1,833,069	$	1,803,666	$	1,691,632	$	1,665,903
Held-to-maturity securities
Due in one year or less	$	5,521	$	5,511	$	170	$	171	$	170	$	171
Due in one to five years	31,782		31,160		38,392		38,012		36,914		36,734
Due in five to ten years	255,146		243,608		205,227		203,680		193,387		192,581
Due after ten years	673,989		631,318		582,660		570,653		588,869		577,550
Total held-to-maturity securities	$	966,438	$	911,597	$	826,449	$	812,516	$	819,340	$	807,036

(1) As a result of the adoption of ASU No. 2016-01 effective January 1, 2018, equity securities with readily determinable fair value are no longer presented within available-for-sale securities and are now presented as equity securities with readily determinable fair values in the Company's Consolidated Statements of Condition for the current period.

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Loans (Tables)

9 Months Ended

Sep. 30, 2018

Loans and Leases Receivable Disclosure [Abstract]

Summary of Loan Portfolio

The following table shows the Company’s loan portfolio by category as of the dates shown:

	September 30,			December 31,			September 30,
(Dollars in thousands)	2018			2017			2017
Balance:
Commercial	$	7,473,958		$	6,787,677		$	6,456,034
Commercial real estate	6,746,774			6,580,618			6,400,781
Home equity	578,844			663,045			672,969
Residential real estate	924,250			832,120			789,499
Premium finance receivables—commercial	2,885,327			2,634,565			2,664,912
Premium finance receivables—life insurance	4,398,971			4,035,059			3,795,474
Consumer and other	115,827			107,713			133,112
Total loans, net of unearned income, excluding covered loans	$	23,123,951		$	21,640,797		$	20,912,781
Covered loans	—			—			46,601
Total loans	$	23,123,951		$	21,640,797		$	20,959,382
Mix:
Commercial	32		%	31		%	31		%
Commercial real estate	29			30			31
Home equity	3			3			3
Residential real estate	4			4			3
Premium finance receivables—commercial	12			12			13
Premium finance receivables—life insurance	19			19			18
Consumer and other	1			1			1
Total loans, net of unearned income, excluding covered loans	100		%	100		%	100		%
Covered loans	—			—			—
Total loans	100		%	100		%	100		%

Schedule of Unpaid Principal Balance and Carrying Value of Acquired Loans

The following table presents the unpaid principal balance and carrying value for these acquired loans:

	September 30, 2018				December 31, 2017
(Dollars in thousands)	Unpaid Principal Balance		Carrying Value		Unpaid Principal Balance		Carrying Value
PCI loans	$	325,019	$	304,726	$	375,237	$	350,690

Schedule of Loans Acquired with Deteriorated Credit Quality

The following table provides estimated details as of the date of acquisition on loans acquired in 2018 with evidence of credit quality deterioration since origination:

(Dollars in thousands)	Delaware Place Bank
Contractually required payments including interest	$	13,367
Less: Nonaccretable difference	1,197
Cash flows expected to be collected (1)	$	12,170
Less: Accretable yield	2,321
Fair value of PCI loans acquired	$	9,849

(1) Represents undiscounted expected principal and interest cash at acquisition.

Activity Related to Accretable Yield of PCI Loans

The following table provides activity for the accretable yield of PCI loans:

	Three Months Ended						Nine Months Ended
(Dollars in thousands)	September 30, 2018			September 30, 2017			September 30, 2018			September 30, 2017
Accretable yield, beginning balance	$	34,347		$	45,510		$	36,565		$	49,408
Acquisitions	2,321			—			2,321			426
Accretable yield amortized to interest income	(4,144		)	(5,025		)	(12,915		)	(16,101		)
Accretable yield amortized to indemnification asset/liability (1)	—			(371		)	—			(1,086		)
Reclassification from non-accretable difference (2)	1,734			1,017			4,596			7,106
Increases in interest cash flows due to payments and changes in interest rates	(1,093		)	(875		)	2,598			503
Accretable yield, ending balance	$	33,165		$	40,256		$	33,165		$	40,256

(1) Represents the portion of the current period accreted yield, resulting from lower expected losses, applied to reduce the loss share indemnification asset or increase the loss share indemnification liability.

(2) Reclassification is the result of subsequent increases in expected principal cash flows.

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Allowance for Loan Losses, Allowance for Losses on Lending-Related Commitments and Impaired Loans (Tables)

9 Months Ended

Sep. 30, 2018

Receivables [Abstract]

Schedule of Aging of the Company's Loan Portfolio

The tables below show the aging of the Company’s loan portfolio at September 30, 2018, December 31, 2017 and September 30, 2017:

As of September 30, 2018			90+ days and still accruing		60-89 days past due		30-59 days past due
(Dollars in thousands)	Nonaccrual								Current		Total Loans
Loan Balances:
Commercial
Commercial, industrial and other	$	41,322	$	—	$	2,535	$	16,451	$	4,745,178	$	4,805,486
Franchise	16,351		5,122		—		—		915,817		937,290
Mortgage warehouse lines of credit	—		—		3,000		—		168,860		171,860
Asset-based lending	910		—		590		9,083		1,023,268		1,033,851
Leases	4		—		—		80		509,591		509,675
PCI - commercial (1)	—		3,372		15		—		12,409		15,796
Total commercial	58,587		8,494		6,140		25,614		7,375,123		7,473,958
Commercial real estate:
Construction	1,554		—		1,823		16,228		778,725		798,330
Land	228		—		365		—		118,411		119,004
Office	1,532		—		4,058		3,021		932,166		940,777
Industrial	178		—		122		145		885,486		885,931
Retail	10,586		—		4,570		10,645		861,901		887,702
Multi-family	318		—		—		1,162		922,413		923,893
Mixed use and other	3,119		—		9,654		11,503		2,062,179		2,086,455
PCI - commercial real estate (1)	—		5,578		6,448		1,380		91,276		104,682
Total commercial real estate	17,515		5,578		27,040		44,084		6,652,557		6,746,774
Home equity	8,523		—		1,075		3,478		565,768		578,844
Residential real estate, including PCI	16,062		1,865		1,714		603		904,006		924,250
Premium finance receivables
Commercial insurance loans	13,802		7,028		5,945		13,239		2,845,313		2,885,327
Life insurance loans	—		—		—		22,016		4,203,465		4,225,481
PCI - life insurance loans (1)	—		—		—		—		173,490		173,490
Consumer and other, including PCI	355		295		430		329		114,418		115,827
Total loans, net of unearned income	$	114,844	$	23,260	$	42,344	$	109,363	$	22,834,140	$	23,123,951

As of December 31, 2017			90+ days and still accruing		60-89 days past due		30-59 days past due
(Dollars in thousands)	Nonaccrual								Current		Total Loans
Loan Balances:
Commercial
Commercial, industrial and other	$	11,260	$	—	$	3,746	$	13,392	$	4,314,107	$	4,342,505
Franchise	2,447		—		—		—		845,150		847,597
Mortgage warehouse lines of credit	—		—		—		4,000		190,523		194,523
Asset-based lending	1,550		—		283		10,057		968,576		980,466
Leases	439		—		3		1,958		410,772		413,172
PCI - commercial (1)	—		877		186		—		8,351		9,414
Total commercial	15,696		877		4,218		29,407		6,737,479		6,787,677
Commercial real estate
Construction	3,143		—		—		200		742,171		745,514
Land	188		—		—		5,156		121,140		126,484
Office	2,438		—		—		4,458		887,937		894,833
Industrial	811		—		—		2,412		879,796		883,019
Retail	12,328		—		668		148		938,383		951,527
Multi-family	—		—		—		1,034		914,610		915,644
Mixed use and other	3,140		—		1,423		9,641		1,921,501		1,935,705
PCI - commercial real estate (1)	—		7,135		2,255		6,277		112,225		127,892
Total commercial real estate	22,048		7,135		4,346		29,326		6,517,763		6,580,618
Home equity	8,978		—		518		4,634		648,915		663,045
Residential real estate, including PCI	17,977		5,304		1,303		8,378		799,158		832,120
Premium finance receivables
Commercial insurance loans	12,163		9,242		17,796		15,849		2,579,515		2,634,565
Life insurance loans	—		—		4,837		10,017		3,820,936		3,835,790
PCI - life insurance loans (1)	—		—		—		—		199,269		199,269
Consumer and other, including PCI	740		101		242		727		105,903		107,713
Total loans, net of unearned income	$	77,602	$	22,659	$	33,260	$	98,338	$	21,408,938	$	21,640,797

(1) PCI loans represent loans acquired with evidence of credit quality deterioration since origination, in accordance with ASC 310-30.Loan agings are based upon contractually required payments.

As of September 30, 2017			90+ days and still accruing		60-89 days past due		30-59 days past due
(Dollars in thousands)	Nonaccrual								Current		Total Loans
Loan Balances:
Commercial
Commercial, industrial and other	$	12,281	$	—	$	3,161	$	13,710	$	4,091,381	$	4,120,533
Franchise	—		—		—		16,719		836,997		853,716
Mortgage warehouse lines of credit	—		—		—		312		194,058		194,370
Asset-based lending	1,141		—		1,533		4,515		889,147		896,336
Leases	509		—		281		1,194		379,410		381,394
PCI - commercial (1)	—		1,489		61		—		8,135		9,685
Total commercial	13,931		1,489		5,036		36,450		6,399,128		6,456,034
Commercial real estate:
Construction	1,607		—		366		2,064		669,940		673,977
Land	196		—		—		—		102,557		102,753
Office	5,148		—		—		1,220		874,583		880,951
Industrial	1,848		—		137		438		834,062		836,485
Retail	2,200		—		3,030		3,674		925,335		934,239
Multi-family	569		—		68		3,058		861,290		864,985
Mixed use and other	3,310		—		843		3,561		1,966,601		1,974,315
PCI - commercial real estate (1)	—		8,443		1,394		2,940		120,299		133,076
Total commercial real estate	14,878		8,443		5,838		16,955		6,354,667		6,400,781
Home equity	7,581		—		446		2,590		662,352		672,969
Residential real estate, including PCI	14,743		1,120		2,055		165		771,416		789,499
Premium finance receivables
Commercial insurance loans	9,827		9,584		7,421		9,966		2,628,114		2,664,912
Life insurance loans	—		6,740		946		6,937		3,571,388		3,586,011
PCI - life insurance loans (1)	—		—		—		—		209,463		209,463
Consumer and other, including PCI	540		221		242		685		131,424		133,112
Total loans, net of unearned income, excluding covered loans	$	61,500	$	27,597	$	21,984	$	73,748	$	20,727,952	$	20,912,781
Covered loans	1,936		2,233		1,074		45		41,313		46,601
Total loans, net of unearned income	$	63,436	$	29,830	$	23,058	$	73,793	$	20,769,265	$	20,959,382

(1) PCI loans represent loans acquired with evidence of credit quality deterioration since origination, in accordance with ASC 310-30.Loan agings are based upon contractually required payments.

Summary of Performance by Loan Class

The following table presents the recorded investment based on performance of loans by class, excluding covered loans, per the most recent analysis at September 30, 2018, December 31, 2017 and September 30, 2017:

	Performing						Non-performing						Total
(Dollars in thousands)	September 30, 2018		December 31, 2017		September 30, 2017		September 30, 2018		December 31, 2017		September 30, 2017		September 30, 2018		December 31, 2017		September 30, 2017
Loan Balances:
Commercial
Commercial, industrial and other	$	4,764,164	$	4,331,245	$	4,108,252	$	41,322	$	11,260	$	12,281	$	4,805,486	$	4,342,505	$	4,120,533
Franchise	915,817		845,150		853,716		21,473		2,447		—		937,290		847,597		853,716
Mortgage warehouse lines of credit	171,860		194,523		194,370		—		—		—		171,860		194,523		194,370
Asset-based lending	1,032,941		978,916		895,195		910		1,550		1,141		1,033,851		980,466		896,336
Leases	509,671		412,733		380,885		4		439		509		509,675		413,172		381,394
PCI - commercial (1)	15,796		9,414		9,685		—		—		—		15,796		9,414		9,685
Total commercial	7,410,249		6,771,981		6,442,103		63,709		15,696		13,931		7,473,958		6,787,677		6,456,034
Commercial real estate
Construction	796,776		742,371		672,370		1,554		3,143		1,607		798,330		745,514		673,977
Land	118,776		126,296		102,557		228		188		196		119,004		126,484		102,753
Office	939,245		892,395		875,803		1,532		2,438		5,148		940,777		894,833		880,951
Industrial	885,753		882,208		834,637		178		811		1,848		885,931		883,019		836,485
Retail	877,116		939,199		932,039		10,586		12,328		2,200		887,702		951,527		934,239
Multi-family	923,575		915,644		864,416		318		—		569		923,893		915,644		864,985
Mixed use and other	2,083,336		1,932,565		1,971,005		3,119		3,140		3,310		2,086,455		1,935,705		1,974,315
PCI - commercial real estate(1)	104,682		127,892		133,076		—		—		—		104,682		127,892		133,076
Total commercial real estate	6,729,259		6,558,570		6,385,903		17,515		22,048		14,878		6,746,774		6,580,618		6,400,781
Home equity	570,321		654,067		665,388		8,523		8,978		7,581		578,844		663,045		672,969
Residential real estate, including PCI	908,188		810,865		774,756		16,062		21,255		14,743		924,250		832,120		789,499
Premium finance receivables
Commercial insurance loans	2,864,497		2,613,160		2,645,501		20,830		21,405		19,411		2,885,327		2,634,565		2,664,912
Life insurance loans	4,225,481		3,835,790		3,579,271		—		—		6,740		4,225,481		3,835,790		3,586,011
PCI - life insurance loans (1)	173,490		199,269		209,463		—		—		—		173,490		199,269		209,463
Consumer and other, including PCI	115,239		106,933		132,413		588		780		699		115,827		107,713		133,112
Total loans, net of unearned income, excluding covered loans	$	22,996,724	$	21,550,635	$	20,834,798	$	127,227	$	90,162	$	77,983	$	23,123,951	$	21,640,797	$	20,912,781

(1) PCI loans represent loans acquired with evidence of credit quality deterioration since origination, in accordance with ASC 310-30. See Note 6 - Loans for further discussion of these purchased loans.

Summary of Activity in the Allowance for Credit Losses

A summary of activity in the allowance for credit losses by loan portfolio (excluding covered loans) for the nine months endedSeptember 30, 2018 and 2017 is as follows:

Three months ended September 30, 2018				Commercial Real Estate			Home  Equity			Residential Real Estate			Premium Finance Receivables			Consumer and Other			Total, Excluding Covered Loans
(Dollars in thousands)	Commercial
Allowance for credit losses
Allowance for loan losses at beginning of period	$	60,727		$	57,660		$	9,551		$	6,336		$	7,734		$	1,394		$	143,402
Other adjustments	(1		)	(15		)	(2		)	(14		)	14			—			(18		)
Reclassification from allowance for unfunded lending-related commitments	—			(2		)	—			—			—			—			(2		)
Charge-offs	(3,219		)	(208		)	(561		)	(337		)	(2,512		)	(144		)	(6,981		)
Recoveries	304			193			142			466			1,142			66			2,313
Provision for credit losses	8,934			619			13			(160		)	1,796			(160		)	11,042
Allowance for loan losses at period end	$	66,745		$	58,247		$	9,143		$	6,291		$	8,174		$	1,156		$	149,756
Allowance for unfunded lending-related commitments at period end	$	—		$	1,245		$	—		$	—		$	—		$	—		$	1,245
Allowance for credit losses at period end	$	66,745		$	59,492		$	9,143		$	6,291		$	8,174		$	1,156		$	151,001
Individually evaluated for impairment	$	10,164		$	3,158		$	611		$	325		$	—		$	117		$	14,375
Collectively evaluated for impairment	55,987			56,316			8,532			5,894			8,174			1,039			135,942
Loans acquired with deteriorated credit quality	594			18			—			72			—			—			684
Loans at period end
Individually evaluated for impairment	$	67,381		$	31,952		$	11,284		$	21,781		$	—		$	401		$	132,799
Collectively evaluated for impairment	7,390,781			6,610,140			567,560			815,442			7,110,808			113,812			22,608,543
Loans acquired with deteriorated credit quality	15,796			104,682			—			9,144			173,490			1,614			304,726
Loans held at fair value	—			—			—			77,883			—			—			77,883

Three months ended September 30, 2017	Commercial			Commercial Real Estate			Home  Equity			Residential Real Estate			Premium Finance Receivables			Consumer and Other			Total, Excluding Covered Loans
(Dollars in thousands)
Allowance for credit losses
Allowance for loan losses at beginning of period	$	52,358		$	52,339		$	11,134		$	6,143		$	6,352		$	1,265		$	129,591
Other adjustments	(2		)	(38		)	—			(31		)	32			—			(39		)
Reclassification from allowance for unfunded lending-related commitments	500			(406		)	—			—			—			—			94
Charge-offs	(2,265		)	(989		)	(968		)	(267		)	(1,716		)	(213		)	(6,418		)
Recoveries	801			323			178			55			499			93			1,949
Provision for credit losses	4,343			811			212			757			1,386			433			7,942
Allowance for loan losses at period end	$	55,735		$	52,040		$	10,556		$	6,657		$	6,553		$	1,578		$	133,119
Allowance for unfunded lending-related commitments at period end	$	—		$	1,276		$	—		$	—		$	—		$	—		$	1,276
Allowance for credit losses at period end	$	55,735		$	53,316		$	10,556		$	6,657		$	6,553		$	1,578		$	134,395
Individually evaluated for impairment	$	4,568		$	1,184		$	691		$	758		$	—		$	34		$	7,235
Collectively evaluated for impairment	50,623			52,048			9,865			5,813			6,553			1,544			126,446
Loans acquired with deteriorated credit quality	544			84			—			86			—			—			714
Loans at period end
Individually evaluated for impairment	$	18,086		$	31,698		$	7,729		$	21,263		$	—		$	544		$	79,320
Collectively evaluated for impairment	6,428,263			6,236,007			665,240			735,185			6,250,923			13,581			20,447,199
Loans acquired with deteriorated credit quality	9,685			133,076			—			3,637			209,463			987			356,848
Loans held at fair value	—			—			—			29,414			—			—			29,414

Nine months ended September 30, 2018				Commercial Real Estate			Home  Equity			Residential Real Estate			Premium Finance Receivable			Consumer and Other			Total, Excluding Covered Loans
(Dollars in thousands)	Commercial
Allowance for credit losses
Allowance for loan losses at beginning of period	$	57,811		$	55,227		$	10,493		$	6,688		$	6,846		$	840		$	137,905
Other adjustments	(3		)	(66		)	(2		)	(19		)	(12		)	—			(102		)
Reclassification from allowance for unfunded lending-related commitments	—			24			—			—			—			—			24
Charge-offs	(8,116		)	(1,176		)	(1,530		)	(1,088		)	(10,487		)	(732		)	(23,129		)
Recoveries	1,232			4,267			436			2,028			2,502			162			10,627
Provision for credit losses	15,821			(29		)	(254		)	(1,318		)	9,325			886			24,431
Allowance for loan losses at period end	$	66,745		$	58,247		$	9,143		$	6,291		$	8,174		$	1,156		$	149,756
Allowance for unfunded lending-related commitments at period end	$	—		$	1,245		$	—		$	—		$	—		$	—		$	1,245
Allowance for credit losses at period end	$	66,745		$	59,492		$	9,143		$	6,291		$	8,174		$	1,156		$	151,001

Nine months ended September 30, 2017				Commercial Real Estate			Home  Equity			Residential Real Estate			Premium Finance Receivable			Consumer and Other			Total, Excluding Covered Loans
(Dollars in thousands)	Commercial
Allowance for credit losses
Allowance for loan losses at beginning of period	$	44,493		$	51,422		$	11,774		$	5,714		$	7,625		$	1,263		$	122,291
Other adjustments	(23		)	(121		)	—			(38		)	57			—			(125		)
Reclassification from allowance for unfunded lending-related commitments	500			(438		)	—			—			—			—			62
Charge-offs	(3,819		)	(3,235		)	(3,224		)	(742		)	(5,021		)	(522		)	(16,563		)
Recoveries	1,635			1,153			387			287			1,515			267			5,244
Provision for credit losses	12,949			3,259			1,619			1,436			2,377			570			22,210
Allowance for loan losses at period end	$	55,735		$	52,040		$	10,556		$	6,657		$	6,553		$	1,578		$	133,119
Allowance for unfunded lending-related commitments at period end	$	—		$	1,276		$	—		$	—		$	—		$	—		$	1,276
Allowance for credit losses at period end	$	55,735		$	53,316		$	10,556		$	6,657		$	6,553		$	1,578		$	134,395

Summary Of Activity In Allowance For Covered Loan By FDIC Loss Table

A summary of activity in the allowance for covered loan losses for the three and nine months endedSeptember 30, 2017 is as follows:

	Three Months Ended			Nine Months Ended
	September 30,			September 30,
(Dollars in thousands)	2017			2017
Balance at beginning of period	$	1,074		$	1,322
Provision for covered loan losses before benefit attributable to FDIC loss share agreements	(225		)	(1,063		)
Benefit attributable to FDIC loss share agreements	180			850
Net provision for covered loan losses	(45		)	(213		)
Increase in FDIC indemnification liability	(180		)	(850		)
Loans charged-off	(155		)	(491		)
Recoveries of loans charged-off	64			990
Net (charge-offs) recoveries	(91		)	499
Balance at end of period	$	758		$	758

Summary of Impaired Loans, Including Restructured Loans

A summary of impaired loans, including troubled debt restructurings ("TDRs"), is as follows:

	September 30,		December 31,		September 30,
(Dollars in thousands)	2018		2017		2017
Impaired loans (included in non-performing and TDRs):
Impaired loans with an allowance for loan loss required (1)	$	83,349	$	36,084	$	30,864
Impaired loans with no allowance for loan loss required	49,173		69,004		47,730
Total impaired loans (2)	$	132,522	$	105,088	$	78,594
Allowance for loan losses related to impaired loans	$	14,365	$	8,023	$	7,218
TDRs	$	66,219	$	49,786	$	33,183

(1) These impaired loans require an allowance for loan losses because the estimated fair value of the loans or related collateral is less than the recorded investment in the loans.

(2) Impaired loans are considered by the Company to be non-accrual loans, TDRs or loans with principal and/or interest at risk, even if theloan is current with all payments of principal and interest.

Summary of Impaired Loans by Loan Class

The following tables present impaired loans by loan class, excluding covered loans, for the periods ended as follows:

							For the Nine Months Ended
	As of September 30, 2018						September 30, 2018
	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average  Recorded Investment		Interest Income Recognized
(Dollars in thousands)
Impaired loans with a related ASC 310 allowance recorded
Commercial
Commercial, industrial and other	$	36,564	$	36,699	$	8,242	$	30,259	$	1,404
Franchise	16,316		18,504		1,638		18,387		771
Asset-based lending	646		646		283		724		39
Leases	1,777		1,777		1		1,836		69
Commercial real estate
Construction	1,554		1,554		390		1,554		56
Land	1,375		1,375		1		1,508		53
Office	579		647		26		591		19
Industrial	45		154		1		56		6
Retail	15,325		15,567		2,413		15,376		535
Multi-family	1,197		1,197		8		1,209		32
Mixed use and other	1,590		1,801		309		1,754		76
Home equity	2,287		2,651		611		2,303		78
Residential real estate	3,977		4,291		325		3,998		128
Consumer and other	117		130		117		119		5
Impaired loans with no related ASC 310 allowance recorded
Commercial
Commercial, industrial and other	$	5,758	$	7,022	$	—	$	9,325	$	465
Franchise	5,157		5,158		—		5,376		302
Asset-based lending	264		1,088		—		1,623		89
Leases	899		930		—		974		43
Commercial real estate
Construction	1,117		1,117		—		1,252		40
Land	2,325		2,431		—		2,366		98
Office	1,532		2,077		—		1,541		86
Industrial	178		195		—		188		9
Retail	777		946		—		874		42
Multi-family	318		412		—		329		9
Mixed use and other	3,763		4,362		—		3,950		194
Home equity	8,997		12,131		—		9,015		462
Residential real estate	17,804		20,291		—		18,193		643
Consumer and other	284		408		—		295		15
Total impaired loans, net of unearned income	$	132,522	$	145,561	$	14,365	$	134,975	$	5,768

							For the Twelve Months Ended
	As of December 31, 2017						December 31, 2017
	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average  Recorded Investment		Interest Income Recognized
(Dollars in thousands)
Impaired loans with a related ASC 310 allowance recorded
Commercial
Commercial, industrial and other	$	6,233	$	7,323	$	3,951	$	7,220	$	452
Franchise	—		—		—		—		—
Asset-based lending	948		949		355		1,302		72
Leases	2,331		2,337		158		2,463		117
Commercial real estate
Construction	3,097		3,897		403		3,690		197
Land	—		—		—		—		—
Office	471		471		5		481		24
Industrial	408		408		40		414		25
Retail	15,599		15,657		1,336		15,736		624
Multi-family	—		—		—		—		—
Mixed use and other	1,567		1,586		379		1,599		77
Home equity	1,606		1,869		784		1,626		81
Residential real estate	3,798		3,910		586		3,790		146
Consumer and other	26		28		26		27		2
Impaired loans with no related ASC 310 allowance recorded
Commercial
Commercial, industrial and other	$	8,460	$	12,259	$	—	$	10,170	$	683
Franchise	16,256		16,256		—		17,089		780
Asset-based lending	602		602		—		688		40
Leases	782		782		—		845		49
Commercial real estate
Construction	1,367		1,678		—		1,555		84
Land	3,961		4,192		—		4,129		182
Office	2,438		6,140		—		3,484		330
Industrial	403		2,010		—		1,849		174
Retail	2,393		3,538		—		2,486		221
Multi-family	1,231		2,078		—		1,246		76
Mixed use and other	5,275		6,731		—		5,559		351
Home equity	7,648		11,648		—		9,114		603
Residential real estate	17,455		20,327		—		17,926		860
Consumer and other	733		890		—		773		48
Total impaired loans, net of unearned income	$	105,088	$	127,566	$	8,023	$	115,261	$	6,298

							For the Nine Months Ended
	As of September 30, 2017						September 30, 2017
	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average  Recorded Investment		Interest Income Recognized
(Dollars in thousands)
Impaired loans with a related ASC 310 allowance recorded
Commercial
Commercial, industrial and other	$	7,312	$	8,458	$	4,191	$	8,390	$	407
Franchise	—		—		—		—		—
Asset-based lending	588		589		161		588		21
Leases	2,440		2,444		215		2,539		91
Commercial real estate
Construction	1,607		2,408		94		2,319		93
Land	—		—		—		—		—
Office	2,225		2,291		570		2,280		94
Industrial	408		408		75		415		19
Retail	5,932		6,072		158		5,998		191
Multi-family	1,239		1,239		8		1,250		33
Mixed use and other	1,537		1,695		263		1,580		60
Home equity	1,511		1,721		691		1,528		53
Residential real estate	5,842		6,154		758		5,842		177
Consumer and other	223		224		34		225		10
Impaired loans with no related ASC 310 allowance recorded
Commercial
Commercial, industrial and other	$	5,995	$	7,260	$	—	$	6,662	$	294
Franchise	—		—		—		—		—
Asset-based lending	553		553		—		728		31
Leases	817		817		—		862		38
Commercial real estate
Construction	1,504		1,504		—		1,524		49
Land	3,968		4,217		—		4,110		136
Office	3,400		3,585		—		3,565		147
Industrial	1,440		2,729		—		2,885		183
Retail	1,978		1,988		—		2,008		103
Multi-family	569		653		—		571		23
Mixed use and other	5,546		6,267		—		5,745		241
Home equity	6,218		9,523		—		7,231		339
Residential real estate	15,421		17,859		—		15,726		575
Consumer and other	321		433		—		334		16
Total impaired loans, net of unearned income	$	78,594	$	91,091	$	7,218	$	84,905	$	3,424

Summary of the Post-Modification Balance of TDRs

The tables below present a summary of the post-modification balance of loans restructured during the three and nine months endedSeptember 30, 2018 and 2017, respectively, which represent TDRs:

Three months ended September 30, 2018 (Dollars in thousands)	Total (1)(2)			Extension at Below Market Terms (2)			Reduction of Interest Rate (2)			Modification to  Interest-only Payments (2)			Forgiveness of Debt(2)
	Count	Balance		Count	Balance		Count	Balance		Count	Balance		Count	Balance
Commercial
Commercial, industrial and other	1	$	519	1	$	519	—	$	—	—	$	—	—	$	—
Franchise	1	35		1	35		—	—		—	—		—	—
Leases	—	—		—	—		—	—		—	—		—	—
Commercial real estate
Office	—	—		—	—		—	—		—	—		—	—
Mixed use and other	—	—		—	—		—	—		—	—		—	—
Residential real estate and other	20	3,679		20	3,679		7	621		—	—		—	—
Total loans	22	$	4,233	22	$	4,233	7	$	621	—	$	—	—	$	—

(1) TDRs may have more than one modification representing a concession. As such, TDRs during the period may be represented in more than one of the categories noted above.

(2) Balances represent the recorded investment in the loan at the time of the restructuring.

Three months ended September 30, 2017 (Dollars in thousands)	Total (1)(2)			Extension at Below Market Terms (2)			Reduction of Interest Rate (2)			Modification to  Interest-only Payments (2)			Forgiveness of Debt(2)
	Count	Balance		Count	Balance		Count	Balance		Count	Balance		Count	Balance
Commercial
Commercial, industrial and other	3	$	1,408	—	$	—	—	$	—	3	$	1,408	—	$	—
Franchise	—	—		—	—		—	—		—	—		—	—
Leases	—	—		—	—		—	—		—	—		—	—
Commercial real estate
Office	—	—		—	—		—	—		—	—		—	—
Mixed use and other	—	—		—	—		—	—		—	—		—	—
Residential real estate and other	2	255		1	186		2	255		—	—		1	69
Total loans	5	$	1,663	1	$	186	2	$	255	3	$	1,408	1	$	69

(1) TDRs may have more than one modification representing a concession. As such, TDRs during the period may be represented in more than one of the categories noted above.

(2) Balances represent the recorded investment in the loan at the time of the restructuring.

Nine months ended September 30, 2018 (Dollars in thousands)	Total (1)(2)			Extension at Below Market Terms (2)			Reduction of Interest Rate (2)			Modification to  Interest-only Payments (2)			Forgiveness of Debt(2)
	Count	Balance		Count	Balance		Count	Balance		Count	Balance		Count	Balance
Commercial
Commercial, industrial and other	4	$	13,442	3	$	692	—	$	—	1	$	12,750	—	$	—
Franchise	3	5,157		1	35		—	—		2	5,122		—	—
Leases	1	239		1	239		—	—		—	—		—	—
Commercial real estate
Office	1	59		1	59		—	—		—	—		—	—
Mixed use and other	1	85		1	85		1	85		—	—		—	—
Residential real estate and other	31	5,846		31	5,846		12	1,417		—	—		—	—
Total loans	41	$	24,828	38	$	6,956	13	$	1,502	3	$	17,872	—	$	—

Nine months ended September 30, 2017 (Dollars in thousands)	Total (1)(2)			Extension at Below Market Terms (2)			Reduction of Interest Rate (2)			Modification to  Interest-only Payments (2)			Forgiveness of Debt(2)
	Count	Balance		Count	Balance		Count	Balance		Count	Balance		Count	Balance
Commercial
Commercial, industrial and other	4	$	1,503	1	$	95	—	$	—	3	$	1,408	—	$	—
Franchise	—	—		—	—		—	—		—	—		—	—
Leases	—	—		—	—		—	—		—	—		—	—
Commercial real estate
Office	—	—		—	—		—	—		—	—		—	—
Mixed use and other	1	1,245		1	1,245		—	—		—	—		—	—
Residential real estate and other	8	2,638		7	2,569		7	2,589		—	—		1	69
Total loans	13	$	5,386	9	$	3,909	7	$	2,589	3	$	1,408	1	$	69

(1) TDRs may have more than one modification representing a concession. As such, TDRs during the period may be represented in more than one of the categories noted above.

(2) Balances represent the recorded investment in the loan at the time of the restructuring.

Schedule of Loans Restructured with Payments in Default

The following table presents a summary of all loans restructured in TDRs during the twelve months ended September 30, 2018 and 2017, and such loans which were in payment default under the restructured terms during the respective periods below:

(Dollars in thousands)	As of September 30, 2018			Three Months Ended September 30, 2018			Nine Months Ended September 30, 2018
	Total (1)(3)			Payments in Default  (2)(3)			Payments in Default  (2)(3)
	Count	Balance		Count	Balance		Count	Balance
Commercial
Commercial, industrial and other	5	$	15,714	3	$	2,447	3	$	2,447
Franchise	6	21,413		2	5,122		2	5,122
Leases	1	239		—	—		—	—
Commercial real estate
Office	1	59		—	—		—	—
Industrial	—	—		—	—		—	—
Mixed use and other	1	85		1	85		1	85
Residential real estate and other	35	6,257		7	1,457		7	1,457
Total loans	49	$	43,767	13	$	9,111	13	$	9,111

(Dollars in thousands)	As of September 30, 2017			Three Months Ended September 30, 2017			Nine Months Ended September 30, 2017
	Total (1)(3)			Payments in Default  (2)(3)			Payments in Default  (2)(3)
	Count	Balance		Count	Balance		Count	Balance
Commercial
Commercial, industrial and other	4	$	1,503	—	$	—	—	$	—
Franchise	—	—		—	—		—	—
Leases	2	2,949		—	—		—	—
Commercial real estate
Office	—	—		—	—		—	—
Mixed use and other	1	1,245		1	1,245		1	1,245
Residential real estate and other	12	3,137		1	52		2	284
Total loans	19	$	8,834	2	$	1,297	3	$	1,529

(1) Total TDRs represent all loans restructured in TDRs during the previous twelve months from the date indicated.

(2) TDRs considered to be in payment default are over 30 days past-due subsequent to the restructuring.

(3) Balances represent the recorded investment in the loan at the time of the restructuring.

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Goodwill and Other Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill Assets by Business Segment

A summary of the Company’s goodwill assets by business segment is presented in the following table:

(Dollars in thousands)	January 1, 2018		Goodwill Acquired		Impairment Loss		Goodwill Adjustments			September 30, 2018
Community banking	$	429,520	$	36,307	$	—	$	—		$	465,827
Specialty finance	40,250		—		—		(631		)	39,619
Wealth management	32,114		—		—		—			32,114
Total	$	501,884	$	36,307	$	—	$	(631	)	$	537,560

Summary of Intangible Assets

A summary of intangible assets as of the dates shown and the expected amortization of finite-lived intangible assets as of September 30, 2018 is as follows:

(Dollars in thousands)	September 30, 2018			December 31, 2017			September 30, 2017
Community banking segment:
Core deposit intangibles with finite lives:
Gross carrying amount	$	44,395		$	37,272		$	37,272
Accumulated amortization	(28,142		)	(25,427		)	(24,550		)
Net carrying amount	$	16,253		$	11,845		$	12,722
Trademark with indefinite lives:
Carrying amount	5,800			—			—
Total net carrying amount	$	22,053		$	11,845		$	12,722
Specialty finance segment:
Customer list intangibles with finite lives:
Gross carrying amount	$	1,967		$	1,972		$	1,972
Accumulated amortization	(1,407		)	(1,298		)	(1,258		)
Net carrying amount	$	560		$	674		$	714
Wealth management segment:
Customer list and other intangibles with finite lives:
Gross carrying amount	$	7,940		$	7,940		$	7,940
Accumulated amortization	(3,175		)	(2,838		)	(2,725		)
Net carrying amount	$	4,765		$	5,102		$	5,215
Total other intangible assets, net	$	27,378		$	17,621		$	18,651

Summary of Intangible Assets

A summary of intangible assets as of the dates shown and the expected amortization of finite-lived intangible assets as of September 30, 2018 is as follows:

(Dollars in thousands)	September 30, 2018			December 31, 2017			September 30, 2017
Community banking segment:
Core deposit intangibles with finite lives:
Gross carrying amount	$	44,395		$	37,272		$	37,272
Accumulated amortization	(28,142		)	(25,427		)	(24,550		)
Net carrying amount	$	16,253		$	11,845		$	12,722
Trademark with indefinite lives:
Carrying amount	5,800			—			—
Total net carrying amount	$	22,053		$	11,845		$	12,722
Specialty finance segment:
Customer list intangibles with finite lives:
Gross carrying amount	$	1,967		$	1,972		$	1,972
Accumulated amortization	(1,407		)	(1,298		)	(1,258		)
Net carrying amount	$	560		$	674		$	714
Wealth management segment:
Customer list and other intangibles with finite lives:
Gross carrying amount	$	7,940		$	7,940		$	7,940
Accumulated amortization	(3,175		)	(2,838		)	(2,725		)
Net carrying amount	$	4,765		$	5,102		$	5,215
Total other intangible assets, net	$	27,378		$	17,621		$	18,651

Estimated Amortization

Estimated amortization
Actual in nine months ended September 30, 2018	$	3,164
Estimated remaining in 2018	1,253
Estimated—2019	4,517
Estimated—2020	3,681
Estimated—2021	3,014
Estimated—2022	2,388

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Mortgage Servicing Rights ("MSRs") (Tables)

9 Months Ended

Sep. 30, 2018

Disclosures Pertaining to Servicing Assets and Servicing Liabilities [Abstract]

Schedule of Servicing Assets at Fair Value

The following is a summary of the changes in the carrying value of MSRs, accounted for at fair value, for the periods indicated:

	Three Months Ended						Nine Months Ended
	September 30,			September 30,			September 30,			September 30,
(Dollars in thousands)	2018			2017			2018			2017
Balance at beginning of the period	$	63,194		$	27,307		$	33,676		$	19,103
Additions from loans sold with servicing retained	11,340			4,948			23,388			13,162
Additions from acquisitions	—			—			13,806			—
Estimate of changes in fair value due to:
Payoffs and paydowns	(1,081		)	(641		)	(3,647		)	(1,632		)
Changes in valuation inputs or assumptions	1,077			(2,200		)	7,307			(1,219		)
Fair value at end of the period	$	74,530		$	29,414		$	74,530		$	29,414
Unpaid principal balance of mortgage loans serviced for others	$	5,904,300		$	2,622,411

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Deposits (Tables)

9 Months Ended

Sep. 30, 2018

Deposits [Abstract]

Summary of Deposits

The following table is a summary of deposits as of the dates shown:

(Dollars in thousands)	September 30, 2018			December 31, 2017			September 30, 2017
Balance:
Non-interest bearing	$	6,399,213		$	6,792,497		$	6,502,409
NOW and interest bearing demand deposits	2,512,259			2,315,055			2,273,025
Wealth management deposits	2,520,120			2,323,699			2,171,758
Money market	5,429,921			4,515,353			4,607,995
Savings	2,595,164			2,829,373			2,673,201
Time certificates of deposit	5,460,038			4,407,370			4,666,675
Total deposits	$	24,916,715		$	23,183,347		$	22,895,063
Mix:
Non-interest bearing	26		%	29		%	28		%
NOW and interest bearing demand deposits	10			10			10
Wealth management deposits	10			10			10
Money market	22			20			20
Savings	10			12			12
Time certificates of deposit	22			19			20
Total deposits	100		%	100		%	100		%

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Federal Home Loan Bank Advances, Other Borrowings and Subordinated Notes (Tables)

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

Summary of Debt

The following table is a summary of FHLB advances, other borrowings and subordinated notes as of the dates shown:

(Dollars in thousands)	September 30, 2018		December 31, 2017		September 30, 2017
FHLB advances	$	615,000	$	559,663	$	468,962
Other borrowings:
Notes payable	149,799		41,222		41,216
Short-term borrowings	17,431		17,209		19,959
Other	48,043		49,131		49,502
Secured borrowings	158,298		158,561		141,003
Total other borrowings	373,571		266,123		251,680
Subordinated notes	139,172		139,088		139,052
Total FHLB advances, other borrowings and subordinated notes	$	1,127,743	$	964,874	$	859,694

Summary of Pledged Securities Related to Securities Sold Under Repurchase Agreements

The following is a summary of these securities pledged as of September 30, 2018 disaggregated by investment category and maturity of the related customer sweep account, and reconciled to the outstanding balance of securities sold under repurchase agreements:

(Dollars in thousands)	Overnight Sweep Collateral
Available-for-sale securities pledged
Mortgage-backed securities	$	9,547
Held-to-maturity securities pledged
U.S. Government agencies	26,364
Total collateral pledged	$	35,911
Excess collateral	18,480
Securities sold under repurchase agreements	$	17,431

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Junior Subordinated Debentures (Tables)

9 Months Ended

Sep. 30, 2018

Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust [Abstract]

Summary of Junior Subordinated Debentures

The following table provides a summary of the Company’s junior subordinated debentures as of September 30, 2018. The junior subordinated debentures represent the par value of the obligations owed to the Trusts.

(Dollars in thousands)	Common Securities		Trust  Preferred Securities		Junior Subordinated Debentures		Rate Structure	Contractual rate at 9/30/2018		Issue Date	Maturity Date	Earliest Redemption Date
Wintrust Capital Trust III	$	774	$	25,000	$	25,774	L+3.25	5.59	%	04/2003	04/2033	04/2008
Wintrust Statutory Trust IV	619		20,000		20,619		L+2.80	5.20	%	12/2003	12/2033	12/2008
Wintrust Statutory Trust V	1,238		40,000		41,238		L+2.60	5.00	%	05/2004	05/2034	06/2009
Wintrust Capital Trust VII	1,550		50,000		51,550		L+1.95	4.28	%	12/2004	03/2035	03/2010
Wintrust Capital Trust VIII	1,238		25,000		26,238		L+1.45	3.85	%	08/2005	09/2035	09/2010
Wintrust Capital Trust IX	1,547		50,000		51,547		L+1.63	3.96	%	09/2006	09/2036	09/2011
Northview Capital Trust I	186		6,000		6,186		L+3.00	5.34	%	08/2003	11/2033	08/2008
Town Bankshares Capital Trust I	186		6,000		6,186		L+3.00	5.34	%	08/2003	11/2033	08/2008
First Northwest Capital Trust I	155		5,000		5,155		L+3.00	5.40	%	05/2004	05/2034	05/2009
Suburban Illinois Capital Trust II	464		15,000		15,464		L+1.75	4.08	%	12/2006	12/2036	12/2011
Community Financial Shares Statutory Trust II	109		3,500		3,609		L+1.62	3.95	%	06/2007	09/2037	06/2012
Total					$	253,566		4.55	%

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Revenue from Contracts with Customers (Tables)

9 Months Ended

Sep. 30, 2018

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue by Source

The following table presents revenue from contracts with customers, considered in-scope under ASU 2014-09, disaggregated by the revenue source:

(Dollars in thousands)		Three Months Ended				Nine Months Ended
Revenue from contracts with customers	Location in income statement	September 30, 2018		September 30, 2017		September 30, 2018		September 30, 2017
Brokerage and insurance product commissions	Wealth management	$	5,579	$	5,127	$	17,394	$	16,796
Trust	Wealth management	3,003		2,932		9,646		9,477
Asset management	Wealth management	14,052		11,744		41,197		33,583
Total wealth management		22,634		19,803		68,237		59,856
Mortgage broker fees	Mortgage banking	295		412		862		1,142
Service charges on deposit accounts	Service charges on deposit accounts	9,331		8,645		27,339		25,606
Administrative services	Other non-interest income	1,099		1,052		3,365		3,062
Card related fees	Other non-interest income	2,328		1,471		5,583		4,315
Other deposit related fees	Other non-interest income	3,035		3,032		8,927		8,243
Total revenue from contracts with customers		$	38,722	$	34,415	$	114,313	$	102,224

Contract Assets, Contract Liabilities and Receivables from Contracts with Customers

The following table provides information about contract assets, contract liabilities and receivables from contracts with customers:

(Dollars in thousands)	September 30, 2018		December 31, 2017		September 30, 2017
Contract assets	$	—	$	—	$	—
Contract liabilities	$	1,429	$	1,706	$	1,799
Mortgage broker fees receivable	$	9	$	69	$	69
Administrative services receivable	2,425		—		—
Wealth management receivable	7,779		8,102		7,443
Card related fees receivable	—		202		89
Total receivables from contracts with customer	$	10,213	$	8,373	$	7,601

Performance Obligations Unsatisfied at End of Period

These upfront fees represent performance obligations that are unsatisfied or partially unsatisfied at the end of the reporting period.

(Dollars in thousands)
Estimated remaining in 2018	$	92
Estimated—2019	369
Estimated—2020	369
Estimated—2021	303
Estimated—2022	153
Estimated—2023	143
Total	$	1,429

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Segment Information (Tables)

9 Months Ended

Sep. 30, 2018

Segment Reporting [Abstract]

Summary of Segment Information

The following is a summary of certain operating information for reportable segments:

	Three months ended						$ Change in Contribution			% Change  in Contribution
(Dollars in thousands)	September 30, 2018			September 30, 2017
Net interest income:
Community Banking	$	202,435		$	176,526		$	25,909		15	%
Specialty Finance	36,398			30,501			5,897			19
Wealth Management	4,048			4,557			(509		)	(11	)
Total Operating Segments	242,881			211,584			31,297			15
Intersegment Eliminations	4,682			4,404			278			6
Consolidated net interest income	$	247,563		$	215,988		$	31,575		15	%
Non-interest income:
Community Banking	$	69,776		$	52,554		$	17,222		33	%
Specialty Finance	16,963			16,315			648			4
Wealth Management	23,535			20,371			3,164			16
Total Operating Segments	110,274			89,240			21,034			24
Intersegment Eliminations	(10,344		)	(9,509		)	(835		)	(9	)
Consolidated non-interest income	$	99,930		$	79,731		$	20,199		25	%
Net revenue:
Community Banking	$	272,211		$	229,080		$	43,131		19	%
Specialty Finance	53,361			46,816			6,545			14
Wealth Management	27,583			24,928			2,655			11
Total Operating Segments	353,155			300,824			52,331			17
Intersegment Eliminations	(5,662		)	(5,105		)	(557		)	(11	)
Consolidated net revenue	$	347,493		$	295,719		$	51,774		18	%
Segment profit:
Community Banking	$	63,735		$	44,799		$	18,936		42	%
Specialty Finance	22,971			17,043			5,928			35
Wealth Management	5,242			3,784			1,458			39
Consolidated net income	$	91,948		$	65,626		$	26,322		40	%
Segment assets:
Community Banking	$	24,590,027		$	22,426,049		$	2,163,978		10	%
Specialty Finance	4,897,664			4,305,960			591,704			14
Wealth Management	655,040			626,153			28,887			5
Consolidated total assets	$	30,142,731		$	27,358,162		$	2,784,569		10	%

	Nine months ended						$ Change in Contribution			% Change  in Contribution
(Dollars in thousands)	September 30, 2018			September 30, 2017
Net interest income:
Community Banking	$	583,926		$	499,135		$	84,791		17	%
Specialty Finance	100,104			85,871			14,233			17
Wealth Management	12,729			14,532			(1,803		)	(12	)
Total Operating Segments	696,759			599,538			97,221			16
Intersegment Eliminations	14,056			13,439			617			5
Consolidated net interest income	$	710,815		$	612,977		$	97,838		16	%
Non-interest income:
Community Banking	$	192,028		$	160,277		$	31,751		20	%
Specialty Finance	49,005			44,192			4,813			11
Wealth Management	69,789			61,746			8,043			13
Total Operating Segments	310,822			266,215			44,607			17
Intersegment Eliminations	(29,980		)	(27,747		)	(2,233		)	(8	)
Consolidated non-interest income	$	280,842		$	238,468		$	42,374		18	%
Net revenue:
Community Banking	$	775,954		$	659,412		$	116,542		18	%
Specialty Finance	149,109			130,063			19,046			15
Wealth Management	82,518			76,278			6,240			8
Total Operating Segments	1,007,581			865,753			141,828			16
Intersegment Eliminations	(15,924		)	(14,308		)	(1,616		)	(11	)
Consolidated net revenue	$	991,657		$	851,445		$	140,212		16	%
Segment profit:
Community Banking	$	187,395		$	128,502		$	58,893		46	%
Specialty Finance	61,482			47,990			13,492			28
Wealth Management	14,632			12,409			2,223			18
Consolidated net income	$	263,509		$	188,901		$	74,608		39	%

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Derivative Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule Of Fair Value Of Derivative Financial Instruments

The table below presents the fair value of the Company’s derivative financial instruments as of September 30, 2018, December 31, 2017 and September 30, 2017:

	Derivative Assets						Derivative Liabilities
(Dollars in thousands)	September 30, 2018		December 31, 2017		September 30, 2017		September 30, 2018		December 31, 2017		September 30, 2017
Derivatives designated as hedging instruments under ASC 815:
Interest rate derivatives designated as Cash Flow Hedges	$	16,271	$	11,914	$	8,643	$	—	$	12	$	—
Interest rate derivatives designated as Fair Value Hedges	5,126		2,932		2,036		—		—		53
Total derivatives designated as hedging instruments under ASC 815	$	21,397	$	14,846	$	10,679	$	—	$	12	$	53
Derivatives not designated as hedging instruments under ASC 815:
Interest rate derivatives	$	69,865	$	34,139	$	34,489	$	69,342	$	33,704	$	33,982
Interest rate lock commitments	4,128		2,843		2,851		—		269		1
Forward commitments to sell mortgage loans	12		14		19		1,330		1,457		1,495
Foreign exchange contracts	751		227		160		709		229		242
Total derivatives not designated as hedging instruments under ASC 815	$	74,756	$	37,223	$	37,519	$	71,381	$	35,659	$	35,720
Total Derivatives	$	96,153	$	52,069	$	48,198	$	71,381	$	35,671	$	35,773

Schedule Of Cash Flow Hedging Instruments

The table below provides details on each of these cash flow hedges as of September 30, 2018:

	September 30, 2018
(Dollars in thousands)	Notional		Fair Value
Maturity Date	Amount		Asset (Liability)
Interest Rate Swaps:
June 2019	$	200,000	$	1,445
July 2019	250,000		3,275
August 2019	275,000		4,399
January 2020	175,000		1,554
January 2020	25,000		222
April 2020	50,000		317
April 2020	200,000		1,267
June 2020	200,000		3,741
Interest Rate Collars:
September 2023	150,000		51
Total Cash Flow Hedges	$	1,525,000	$	16,271

Rollforward Of Amounts In Accumulated Other Comprehensive Income Related To Interest Rate Swaps Designated As Cash Flow Hedges

A rollforward of the amounts in accumulated other comprehensive loss related to interest rate derivatives designated as cash flow hedges follows:

	Three months ended					Nine months ended
(Dollars in thousands)	September 30, 2018			September 30, 2017		September 30, 2018			September 30, 2017
Unrealized gain at beginning of period	$	16,059		$	8,249	$	11,902		$	6,944
Amount reclassified from accumulated other comprehensive loss to interest expense on deposits and junior subordinated debentures	(2,319		)	14		(4,338		)	1,051
Amount of gain recognized in other comprehensive income	2,531			380		8,707			648
Unrealized gain at end of period	$	16,271		$	8,643	$	16,271		$	8,643

Schedule of Carrying Amount of Hedged Assets/(Liabilities)

The following table presents the carrying amount of the hedged assets/(liabilities) and the cumulative amount of fair value hedging adjustment included in the carrying amount of the hedged assets/(liabilities) that are designated as a fair value hedge accounting relationship as of September 30, 2018:

		September 30, 2018
(Dollars in thousands) Derivatives in Fair Value Hedging Relationships	Location in the Statement of Condition	Carrying Amount of the Hedged Assets/(Liabilities)		Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities)			Cumulative Amount of Fair Value Hedging Adjustment Remaining for any Hedged Assets (Liabilities) for which Hedge Accounting has been Discontinued
Interest rate swaps	Loans, net of unearned income, excluding covered loans	$	129,496	$	(5,082	)	$	—

The following table presents the loss or gain recognized related to derivative instruments that are designated as fair value hedges for the respective periods:

(Dollars in thousands) Derivatives in Fair Value Hedging Relationships	Location of (Loss)/Gain Recognized in Income on Derivative	Three Months Ended			Nine Months Ended
		September 30, 2018			September 30, 2018
Interest rate swaps	Interest and fees on loans	$	(25	)	$	(55	)

Summary Amounts Included In Consolidated Statement Of Income Related To Derivatives

Amounts included in the Consolidated Statements of Income related to derivative instruments not designated in hedge relationships were as follows:

(Dollars in thousands)		Three Months Ended						Nine Months Ended
Derivative	Location in income statement	September 30, 2018			September 30, 2017			September 30, 2018		September 30, 2017
Interest rate swaps and caps	Trading (losses) gains, net	$	(55	)	$	(94	)	$	89	$	(762	)
Mortgage banking derivatives	Mortgage banking revenue	(1,122		)	708			858		1,398
Covered call options	Fees from covered call options	627			1,143			2,893		2,792
Foreign exchange contracts	Trading (losses) gains, net	(18		)	(23		)	51		(115		)

Offsetting Assets

The tables below summarize the Company's interest rate derivatives and offsetting positions as of the dates shown.

	Derivative Assets									Derivative Liabilities
	Fair Value									Fair Value
(Dollars in thousands)	September 30, 2018			December 31, 2017			September 30, 2017			September 30, 2018			December 31, 2017			September 30, 2017
Gross Amounts Recognized	$	91,262		$	48,985		$	45,168		$	69,342		$	33,716		$	34,035
Less: Amounts offset in the Statements of Financial Condition	—			—			—			—			—			—
Net amount presented in the Statements of Financial Condition	$	91,262		$	48,985		$	45,168		$	69,342		$	33,716		$	34,035
Gross amounts not offset in the Statements of Financial Condition
Offsetting Derivative Positions	$	(7,887	)	(14,878		)	(16,213		)	$	(7,887	)	(14,878		)	(16,213		)
Collateral Posted	(76,530		)	(18,060		)	(2,950		)	(340		)	(2,220		)	(17,130		)
Net Credit Exposure	$	6,845		$	16,047		$	26,005		$	61,115		$	16,618		$	692

Offsetting Liabilities

The tables below summarize the Company's interest rate derivatives and offsetting positions as of the dates shown.

	Derivative Assets									Derivative Liabilities
	Fair Value									Fair Value
(Dollars in thousands)	September 30, 2018			December 31, 2017			September 30, 2017			September 30, 2018			December 31, 2017			September 30, 2017
Gross Amounts Recognized	$	91,262		$	48,985		$	45,168		$	69,342		$	33,716		$	34,035
Less: Amounts offset in the Statements of Financial Condition	—			—			—			—			—			—
Net amount presented in the Statements of Financial Condition	$	91,262		$	48,985		$	45,168		$	69,342		$	33,716		$	34,035
Gross amounts not offset in the Statements of Financial Condition
Offsetting Derivative Positions	$	(7,887	)	(14,878		)	(16,213		)	$	(7,887	)	(14,878		)	(16,213		)
Collateral Posted	(76,530		)	(18,060		)	(2,950		)	(340		)	(2,220		)	(17,130		)
Net Credit Exposure	$	6,845		$	16,047		$	26,005		$	61,115		$	16,618		$	692

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Fair Values of Assets and Liabilities (Tables)

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Summary Of Balances Of Assets And Liabilities Measured At Fair Value On A Recurring Basis

The following tables present the balances of assets and liabilities measured at fair value on a recurring basis for the periods presented:

	September 30, 2018
(Dollars in thousands)	Total		Level 1		Level 2		Level 3
Available-for-sale securities
U.S. Treasury	$	124,761	$	—	$	124,761	$	—
U.S. Government agencies	111,020		—		107,705		3,315
Municipal	133,373		—		35,787		97,586
Corporate notes	93,453		—		93,453		—
Mortgage-backed	1,702,378		—		1,702,378		—
Trading account securities	688		—		688		—
Equity securities with readily determinable fair value	36,414		—		36,414		—
Mortgage loans held-for-sale	338,111		—		338,111		—
Loans held-for-investment	77,883		—		64,427		13,456
MSRs	74,530		—		—		74,530
Nonqualified deferred compensation assets	12,503		—		12,503		—
Derivative assets	96,153		—		93,661		2,492
Total	$	2,801,267	$	—	$	2,609,888	$	191,379
Derivative liabilities	$	71,381	$	—	$	71,381	$	—

	December 31, 2017
(Dollars in thousands)	Total		Level 1		Level 2		Level 3
Available-for-sale securities
U.S. Treasury	$	143,822	$	—	$	143,822	$	—
U.S. Government agencies	156,915		—		153,136		3,779
Municipal	115,352		—		38,171		77,181
Corporate notes	31,050		—		31,050		—
Mortgage-backed	1,319,725		—		1,319,725		—
Equity securities	36,802		—		36,802		—
Trading account securities	995		—		995		—
Mortgage loans held-for-sale	313,592		—		313,592		—
Loans held-for-investment	33,717		—		—		33,717
MSRs	33,676		—		—		33,676
Nonqualified deferred compensation assets	11,065		—		11,065		—
Derivative assets	52,069		—		49,912		2,157
Total	$	2,248,780	$	—	$	2,098,270	$	150,510
Derivative liabilities	$	35,671	$	—	$	35,671	$	—

	September 30, 2017
(Dollars in thousands)	Total		Level 1		Level 2		Level 3
Available-for-sale securities
U.S. Treasury	$	144,145	$	—	$	144,145	$	—
U.S. Government agencies	159,328		—		155,385		3,943
Municipal	116,016		—		47,633		68,383
Corporate notes	60,614		—		60,614		—
Mortgage-backed	1,149,448		—		1,149,448		—
Equity securities	36,352		—		36,352		—
Trading account securities	643		—		643		—
Mortgage loans held-for-sale	370,282		—		370,282		—
Loans held-for-investment	29,704		—		—		29,704
MSRs	29,414		—		—		29,414
Nonqualified deferred compensation assets	10,824		—		10,824		—
Derivative assets	48,198		—		46,982		1,216
Total	$	2,154,968	$	—	$	2,022,308	$	132,660
Derivative liabilities	$	35,773	$	—	$	35,773	$	—

Summary Of Changes In Level 3 Assets And Liabilities Measured At Fair Value On A Recurring Basis

The changes in Level 3 assets measured at fair value on a recurring basis during the three and nine months ended September 30, 2018 and 2017 are summarized as follows:

				U.S. Government Agencies			Loans held-for- investment			Mortgage servicing rights		Derivative Assets
(Dollars in thousands)	Municipal
Balance at July 1, 2018	$	96,566		$	3,482		$	13,764		$	63,194	$	3,819
Total net gains (losses) included in:
Net income (1)	—			—			(32		)	11,336		(1,327		)
Other comprehensive loss	(2,573		)	(9		)	—			—		—
Purchases	4,830			—			—			—		—
Issuances	—			—			—			—		—
Sales	—			—			—			—		—
Settlements	(1,237		)	(158		)	(1,520		)	—		—
Net transfers into/(out of) Level 3	—			—			1,244			—		—
Balance at September 30, 2018	$	97,586		$	3,315		$	13,456		$	74,530	$	2,492

(1) Changes in the balance of MSRs and derivative assets related to fair value adjustments are recorded as components of mortgage banking revenue. Changes in the balance of loans held-for-investment related to fair value adjustments are recorded as other non-interest income.

				U.S. Government Agencies			Loans held-for- investment			Mortgage servicing rights		Derivative Assets
(Dollars in thousands)	Municipal
Balance at January 1, 2018	$	77,181		$	3,779		$	33,717		$	33,676	$	2,157
Total net gains (losses) included in:
Net income (1)	—			—			(1,420		)	27,048		335
Other comprehensive loss	(5,658		)	(306		)	—			—		—
Purchases (2)	31,846			—			—			13,806		—
Issuances	—			—			—			—		—
Sales	—			—			—			—		—
Settlements	(5,783		)	(158		)	(24,177		)	—		—
Net transfers into/(out of) Level 3	—			—			5,336			—		—
Balance at September 30, 2018	$	97,586		$	3,315		$	13,456		$	74,530	$	2,492

				U.S. Government Agencies			Loans held-for- investment			Mortgage servicing rights		Derivative Assets
(Dollars in thousands)	Municipal
Balance at July 1, 2017	$	77,341		$	4,110		$	30,173		$	27,307	$	1,047
Total net gains (losses) included in:
Net income (1)	—			—			177			2,107		169
Other comprehensive income (loss)	(4,113		)	(167		)	—			—		—
Purchases	—			—			—			—		—
Issuances	—			—			—			—		—
Sales	—			—			—			—		—
Settlements	(4,845		)	—			(4,504		)	—		—
Net transfers into/(out of) Level 3	—			—			3,858			—		—
Balance at September 30, 2017	$	68,383		$	3,943		$	29,704		$	29,414	$	1,216

				U.S. Government Agencies			Loans held-for- investment			Mortgage servicing rights		Derivative Assets
(Dollars in thousands)	Municipal
Balance at January 1, 2017	$	79,626		$	—		$	22,137		$	19,103	$	2,291
Total net gains (losses) included in:
Net income (1)	—			—			1,369			10,311		(1,075		)
Other comprehensive income (loss)	(1,084		)	(340		)	—			—		—
Purchases	10,879			—			—			—		—
Issuances	—			—			—			—		—
Sales	—			—			—			—		—
Settlements	(21,038		)	—			(9,995		)	—		—
Net transfers into/(out of) Level 3	—			4,283			16,193			—		—
Balance at September 30, 2017	$	68,383		$	3,943		$	29,704		$	29,414	$	1,216

(1) Changes in the balance of MSRs and derivative assets related to fair value adjustments are recorded as components of mortgage banking revenue. Changes in the balance of loans held-for-investment related to fair value adjustments are recorded as other non-interest income.

(2) Purchased as a part of the Veterans First business combination. See Note 3 - Business Combinations for further discussion.

Summary Of Assets Measured At Fair Value On A Nonrecurring Basis

For assets measured at fair value on a nonrecurring basis that were still held in the balance sheet at the end of the period, the following table provides the carrying value of the related individual assets or portfolios at September 30, 2018.

	September 30, 2018								Three Months Ended September 30, 2018 Fair Value Losses Recognized, net		Nine Months Ended September 30, 2018 Fair Value Losses Recognized, net
(Dollars in thousands)	Total		Level 1		Level 2		Level 3
Impaired loans—collateral based	$	106,219	$	—	$	—	$	106,219	$	3,978	$	11,152
Other real estate owned (1)	28,303		—		—		28,303		1,504		5,173
Total	$	134,522	$	—	$	—	$	134,522	$	5,482	$	16,325

(1) Fair value losses recognized, net on other real estate owned include valuation adjustments and charge-offs during the respective period.

Schedule Of Valuation Techniques And Significant Unobservable Inputs Used To Measure Both Recurring And Non-Recurring

The valuation techniques and significant unobservable inputs used to measure both recurring and non-recurring Level 3 fair value measurements at September 30, 2018 were as follows:

(Dollars in thousands)	Fair Value		Valuation Methodology	Significant Unobservable Input	Range of Inputs	Weighted Average of Inputs	Impact to valuation from an increased or higher input value
Measured at fair value on a recurring basis:
Municipal Securities	$	97,586	Bond pricing	Equivalent rating	BBB-AA+	N/A	Increase
U.S. Government agencies	3,315		Bond pricing	Equivalent rating	AAA	AAA	Increase
Loans held-for-investment	13,456		Discounted cash flows	Discount rate	4%-5%	4.57%	Decrease
				Credit discount	0%-7%	1.00%	Decrease
				Constant prepayment rate (CPR)	10.31%	10.31%	Decrease
MSRs	74,530		Discounted cash flows	Discount rate	7%-18%	10.03%	Decrease
				Constant prepayment rate (CPR)	0%-81%	10.03%	Decrease
				Cost of servicing	$15-$200	$78	Decrease
				Cost of servicing - delinquent	$200-$1,000	$274	Decrease
Derivatives	2,492		Discounted cash flows	Pull-through rate	20%-100%	91.12%	Increase
Measured at fair value on a non-recurring basis:
Impaired loans—collateral based	$	106,219	Appraisal value	Appraisal adjustment - cost of sale	10%	10.00%	Decrease
Other real estate owned	28,303		Appraisal value	Appraisal adjustment - cost of sale	10%	10.00%	Decrease

Summary Of Carrying Amounts And Estimated Fair Values Of Financial Instruments

The table below presents the carrying amounts and estimated fair values of the Company’s financial instruments as of the dates shown:

	At September 30, 2018				At December 31, 2017				At September 30, 2017
	Carrying		Fair		Carrying		Fair		Carrying		Fair
(Dollars in thousands)	Value		Value		Value		Value		Value		Value
Financial Assets:
Cash and cash equivalents	$	279,993	$	279,993	$	277,591	$	277,591	$	251,952	$	251,952
Interest bearing deposits with banks	1,137,044		1,137,044		1,063,242		1,063,242		1,218,728		1,218,728
Available-for-sale securities	2,164,985		2,164,985		1,803,666		1,803,666		1,665,903		1,665,903
Held-to-maturity securities	966,438		911,597		826,449		812,516		819,340		807,036
Trading account securities	688		688		995		995		643		643
Equity securities with readily determinable fair value	36,414		36,414		—		—		—		—
FHLB and FRB stock, at cost	99,998		99,998		89,989		89,989		87,192		87,192
Brokerage customer receivables	15,649		15,649		26,431		26,431		23,631		23,631
Mortgage loans held-for-sale, at fair value	338,111		338,111		313,592		313,592		370,282		370,282
Loans held-for-investment, at fair value	77,883		77,883		33,717		33,717		29,704		29,704
Loans held-for-investment, at amortized cost	23,046,068		23,261,545		21,607,080		21,768,978		20,929,678		21,064,801
MSRs	74,530		74,530		33,676		33,676		29,414		29,414
Nonqualified deferred compensation assets	12,503		12,503		11,065		11,065		10,824		10,824
Derivative assets	96,153		96,153		52,069		52,069		48,198		48,198
Accrued interest receivable and other	254,879		254,879		227,649		227,649		225,435		225,435
Total financial assets	$	28,601,336	$	28,761,972	$	26,367,211	$	26,515,176	$	25,710,924	$	25,833,743
Financial Liabilities
Non-maturity deposits	$	19,456,677	$	19,456,677	$	18,775,977	$	18,775,977	$	18,228,388	$	18,228,388
Deposits with stated maturities	5,460,038		5,475,048		4,407,370		4,350,004		4,666,675		4,608,760
FHLB advances	615,000		615,342		559,663		544,750		468,962		454,753
Other borrowings	373,571		373,571		266,123		266,123		251,680		251,680
Subordinated notes	139,172		146,838		139,088		144,266		139,052		145,376
Junior subordinated debentures	253,566		258,488		253,566		264,696		253,566		240,305
Derivative liabilities	71,381		71,381		35,671		35,671		35,773		35,773
FDIC indemnification liability	—		—		—		—		15,472		15,472
Accrued interest payable	15,374		15,374		8,030		8,030		9,177		9,177
Total financial liabilities	$	26,384,779	$	26,412,719	$	24,445,488	$	24,389,517	$	24,068,745	$	23,989,684

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Stock-Based Compensation Plans (Tables)

9 Months Ended

Sep. 30, 2018

Share-based Compensation [Abstract]

Summary Of Stock Option Activity

A summary of the Company's stock option activity for the nine months endedSeptember 30, 2018 and September 30, 2017 is presented below:

Stock Options	Common Shares		Weighted Average Strike Price		Remaining Contractual Term(1)	Intrinsic Value (2) ($000)
Outstanding at January 1, 2018	1,084,756		$	41.98
Granted	—		—
Exercised	(271,674	)	41.36
Forfeited or canceled	(6,942	)	39.81
Outstanding at September 30, 2018	806,140		$	42.20	3.3	$	34,452
Exercisable at September 30, 2018	609,752		$	42.42	3.0	$	25,924

Stock Options	Common Shares		Weighted Average Strike Price		Remaining Contractual Term (1)	Intrinsic Value (2) ($000)
Outstanding at January 1, 2017	1,698,912		$	41.50
Granted	—		—
Exercised	(499,222	)	40.57
Forfeited or canceled	(16,378	)	43.07
Outstanding at September 30, 2017	1,183,312		$	41.87	4.2	$	43,122
Exercisable at September 30, 2017	640,759		$	41.58	3.5	$	23,532

(1) Represents the remaining weighted average contractual life in years.

(2) Aggregate intrinsic value represents the total pre-tax intrinsic value (i.e., the difference between the Company's stock price on the last trading day of the quarter and the option exercise price, multiplied by the number of shares) that would have been received by the option holders if they had exercised their options on the last day of the quarter. Options with exercise prices above the stock price on the last trading day of the quarter are excluded from the calculation of intrinsic value. The intrinsic value will change based on the fair market value of the Company's stock.

Summary Of Plans' Restricted Share And Performance-Vested Stock Award Activity

A summary of the Plans' restricted share activity for the nine months endedSeptember 30, 2018 and September 30, 2017 is presented below:

	Nine months ended September 30, 2018				Nine months ended September 30, 2017
Restricted Shares	Common Shares		Weighted Average Grant-Date Fair Value		Common Shares		Weighted Average Grant-Date Fair Value
Outstanding at January 1	127,787		$	53.33	133,425		$	49.94
Granted	28,506		87.65		14,249		72.53
Vested and issued	(10,438	)	56.88		(10,695	)	46.03
Forfeited or canceled	(982	)	55.39		(2,551	)	52.26
Outstanding at September 30	144,873		$	59.82	134,428		$	52.60
Vested, but not issuable at September 30	90,294		$	51.88	89,563		$	51.59

A summary of the Plans' performance-based stock award activity, based on the target level of the awards, for the nine months endedSeptember 30, 2018 and September 30, 2017 is presented below:

	Nine months ended September 30, 2018				Nine months ended September 30, 2017
Performance-based Stock	Common Shares		Weighted Average Grant-Date Fair Value		Common Shares		Weighted Average Grant-Date Fair Value
Outstanding at January 1	359,196		$	54.37	298,180		$	43.64
Granted	134,326		88.28		145,829		72.60
Vested and issued	(82,307	)	44.39		(68,712	)	46.85
Forfeited	(13,582	)	59.18		(14,164	)	52.81
Outstanding at September 30	397,633		$	67.72	361,133		$	54.36
Vested, but deferred at September 30	21,477		$	43.52	13,616		$	42.66

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Shareholders' Equity and Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract]

Components Of Other Comprehensive Income (Loss)

The following tables summarize the components of other comprehensive income (loss), including the related income tax effects, and the related amount reclassified to net income for the periods presented (in thousands).

	Accumulated Unrealized Losses on Securities			Accumulated Unrealized Gains on Derivative Instruments			Accumulated Foreign Currency Translation Adjustments			Total Accumulated Other Comprehensive Loss
Balance at July 1, 2018	$	(54,885	)	$	11,748		$	(38,079	)	$	(81,216	)
Other comprehensive (loss) income during the period, net of tax, before reclassifications	(13,277		)	1,851			1,942			(9,484		)
Amount reclassified from accumulated other comprehensive loss into net income, net of tax	(730		)	(1,696		)	—			(2,426		)
Amount reclassified from accumulated other comprehensive loss related to amortization of unrealized losses on investment securities transferred to held-to-maturity from available-for-sale, net of tax	(24		)	—			—			(24		)
Net other comprehensive (loss) income during the period, net of tax	$	(14,031	)	$	155		$	1,942		$	(11,934	)
Balance at September 30, 2018	$	(68,916	)	$	11,903		$	(36,137	)	$	(93,150	)
Balance at January 1, 2018	$	(15,813	)	$	7,164		$	(33,186	)	$	(41,835	)
Cumulative effect adjustment from the adoption of:
ASU 2016-01	(1,880		)	—			—			(1,880		)
ASU 2018-02	(4,517		)	1,543			—			(2,974		)
Other comprehensive (loss) income during the period, net of tax, before reclassifications	(46,665		)	6,368			(2,951		)	(43,248		)
Amount reclassified from accumulated other comprehensive income (loss) into net income, net of tax	(5		)	(3,172		)	—			(3,177		)
Amount reclassified from accumulated other comprehensive loss related to amortization of unrealized losses on investment securities transferred to held-to-maturity from available-for-sale, net of tax	(36		)	—			—			(36		)
Net other comprehensive (loss) income during the period, net of tax	$	(46,706	)	$	3,196		$	(2,951	)	$	(46,461	)
Balance at September 30, 2018	$	(68,916	)	$	11,903		$	(36,137	)	$	(93,150	)

	Accumulated Unrealized Losses on Securities			Accumulated Unrealized Gains on Derivative Instruments		Accumulated Foreign Currency Translation Adjustments			Total Accumulated Other Comprehensive Loss
Balance at July 1, 2017	$	(15,022	)	$	4,959	$	(36,474	)	$	(46,537	)
Other comprehensive income during the period, net of tax, before reclassifications	653			228		4,206			5,087
Amount reclassified from accumulated other comprehensive income into net income, net of tax	(24		)	8		—			(16		)
Amount reclassified from accumulated other comprehensive loss related to amortization of unrealized losses on investment securities transferred to held-to-maturity from available-for-sale, net of tax	(20		)	—		—			(20		)
Net other comprehensive income during the period, net of tax	$	609		$	236	$	4,206		$	5,051
Balance at September 30, 2017	$	(14,413	)	$	5,195	$	(32,268	)	$	(41,486	)
Balance at January 1, 2017	$	(29,309	)	$	4,165	$	(40,184	)	$	(65,328	)
Other comprehensive income during the period, net of tax, before reclassifications	15,815			393		7,916			24,124
Amount reclassified from accumulated other comprehensive income into net income, net of tax	(19		)	637		—			618
Amount reclassified from accumulated other comprehensive loss related to amortization of unrealized losses on investment securities transferred to held-to-maturity from available-for-sale, net of tax	(900		)	—		—			(900		)
Net other comprehensive income during the period, net of tax	$	14,896		$	1,030	$	7,916		$	23,842
Balance at September 30, 2017	$	(14,413	)	$	5,195	$	(32,268	)	$	(41,486	)

Other Comprehensive Income Reclassified from AOCI

	Amount Reclassified from Accumulated Other Comprehensive Income for the
Details Regarding the Component of Accumulated Other Comprehensive Income	Three Months Ended						Nine Months Ended						Impacted Line on the Consolidated Statements of Income
	September 30,						September 30,
	2018			2017			2018			2017
Accumulated unrealized losses on securities
Gains included in net income	$	1,001		$	39		$	6		$	31		Gains (losses) on investment securities, net
	1,001			39			6			31			Income before taxes
Tax effect	$	(271	)	$	(15	)	$	(1	)	$	(12	)	Income tax expense
Net of tax	$	730		$	24		$	5		$	19		Net income
Accumulated unrealized losses on derivative instruments
Amount reclassified to interest expense on deposits	$	(2,319	)	$	(380	)	$	(4,338	)	$	(15	)	Interest on deposits
Amount reclassified to interest expense on junior subordinated debentures	—			394			—			1,066			Interest on junior subordinated debentures
	2,319			(14		)	4,338			(1,051		)	Income before taxes
Tax effect	$	(623	)	$	6		$	(1,166	)	$	414		Income tax expense
Net of tax	$	1,696		$	(8	)	$	3,172		$	(637	)	Net income

Computation Of Basic And Diluted Earnings Per Common Share

The following table shows the computation of basic and diluted earnings per share for the periods indicated:

		Three Months Ended				Nine Months Ended
(In thousands, except per share data)		September 30, 2018		September 30, 2017		September 30, 2018		September 30, 2017
Net income		$	91,948	$	65,626	$	263,509	$	188,901
Less: Preferred stock dividends		2,050		2,050		6,150		7,728
Net income applicable to common shares—Basic	(A)	89,898		63,576		257,359		181,173
Add: Dividends on convertible preferred stock, if dilutive		—		—		—		1,578
Net income applicable to common shares—Diluted	(B)	89,898		63,576		257,359		182,751
Weighted average common shares outstanding	(C)	56,366		55,796		56,268		54,292
Effect of dilutive potential common shares
Common stock equivalents		918		966		912		988
Convertible preferred stock, if dilutive		—		—		—		1,317
Total dilutive potential common shares		918		966		912		2,305
Weighted average common shares and effect of dilutive potential common shares	(D)	57,284		56,762		57,180		56,597
Net income per common share:
Basic	(A/C)	$	1.59	$	1.14	$	4.57	$	3.34
Diluted	(B/D)	$	1.57	$	1.12	$	4.50	$	3.23

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Recent Accounting Developments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Jan. 01, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Unrealized gain from securities	$ (581)	$ 0	$ 456	$ 0
Change in interest income hedge effectiveness			(55)
Provisional tax benefit recognized					$ 7,600
Additional net tax benefit			$ 1,200
ASU 2016-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment						$ (1,880)
ASU 2017-12
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment						(116)
ASU 2018-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment						(2,974)
Retained earnings | ASU 2016-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment						1,880
Retained earnings | ASU 2017-12
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment						(116)
Retained earnings | ASU 2018-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment						2,974
Accumulated other comprehensive loss | ASU 2016-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment						(1,880)
Accumulated other comprehensive loss | ASU 2018-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment						(2,974)
New Accounting Pronouncement, Early Adoption, Effect | Retained earnings | ASU 2018-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment						3,000
New Accounting Pronouncement, Early Adoption, Effect | Accumulated other comprehensive loss | ASU 2018-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment						$ (3,000)

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Business Combinations (Narrative) (Detail) $ in Thousands					3 Months Ended			9 Months Ended		36 Months Ended
	Aug. 01, 2018 USD ($) locations	Jan. 04, 2018 USD ($) Loan	Oct. 16, 2017 USD ($)	Feb. 14, 2017 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) Loan	Sep. 30, 2017 USD ($)	Dec. 31, 2012 financial_institution
Business Acquisition [Line Items]
Assets					$ 27,915,970	$ 27,358,162		$ 30,142,731	$ 27,358,162
Deposits					23,183,347	22,895,063		24,916,715	22,895,063
Goodwill recorded on acquisition								$ 36,307
FDIC loss sharing percentage on purchased loans, OREO, and certain other assets								80.00%
Reduction in estimated loss share liability							$ 4,900
Payments received from the FDIC			$ 15,200			$ (1,049)			$ (258)
Gain contract termination					$ 400
Chicago Shore Corporation
Business Acquisition [Line Items]
Number of locations | locations	1
FDIC Assisted
Business Acquisition [Line Items]
Number of FDIC assisted banks acquired | financial_institution										9
Loans subject to loss share agreements with FDIC | Loan								8
Veterans First Mortgage
Business Acquisition [Line Items]
Goodwill recorded on acquisition		$ 9,100
Number of loans acquired | Loan		10,000
Unpaid principal balance		$ 1,600,000
American Homestead Mortgage, LLC (AHM)
Business Acquisition [Line Items]
Goodwill recorded on acquisition				$ 999
Delaware Place Bank
Business Acquisition [Line Items]
Assets	$ 282,200
Loans receivable of acquired entity	151,000
Deposits	213,100
Goodwill recorded on acquisition	$ 27,200

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Business Combinations (Summary of FDIC Indemnification Asset) (Detail) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
	Oct. 16, 2017	Sep. 30, 2017	Sep. 30, 2017
FDIC Indemnification Asset [Roll Forward]
Balance at beginning of period		$ 15,375	$ 16,701
Reductions from reimbursable expenses		(159)	(316)
Amortization		311	1,010
Changes in expected reimbursements to the FDIC for changes in expected credit losses and reimbursable expenses		994	(1,665)
Payments received from the FDIC	$ 15,200	(1,049)	(258)
Balance at end of period		$ 15,472	$ 15,472

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Investment Securities (Marketable Securities) (Detail) - USD ($)	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Available-for-sale securities
Amortized Cost	$ 2,260,750,000	$ 1,833,069,000	$ 1,691,632,000
Gross Unrealized Gains	1,701,000	6,624,000	8,140,000
Gross Unrealized Losses	(97,466,000)	(36,027,000)	(33,869,000)
Available-for-sale securities, at fair value	2,164,985,000	1,803,666,000	1,665,903,000
Held-to-maturity securities
Amortized Cost	966,438,000	826,449,000	819,340,000
Gross Unrealized Gains	629,000	2,691,000	2,434,000
Gross Unrealized Losses	(55,470,000)	(16,624,000)	(14,738,000)
Held-to-maturity securities, at Fair value	911,597,000	812,516,000	807,036,000
Equity securities with readily determinable fair value
Amortized Cost	33,512,000
Gross Unrealized Gains	4,206,000
Gross Unrealized Losses	(1,304,000)
Fair Value	36,414,000	0	0
U.S. Treasury
Available-for-sale securities
Amortized Cost	125,153,000	144,904,000	144,872,000
Gross Unrealized Gains	0	0	0
Gross Unrealized Losses	(392,000)	(1,082,000)	(727,000)
Available-for-sale securities, at fair value	124,761,000	143,822,000	144,145,000
U.S. Government agencies
Available-for-sale securities
Amortized Cost	111,997,000	157,638,000	159,884,000
Gross Unrealized Gains	8,000	2,000	10,000
Gross Unrealized Losses	(985,000)	(725,000)	(566,000)
Available-for-sale securities, at fair value	111,020,000	156,915,000	159,328,000
Held-to-maturity securities
Amortized Cost	713,423,000	579,062,000	585,061,000
Gross Unrealized Gains	0	23,000	249,000
Gross Unrealized Losses	(47,706,000)	(14,066,000)	(12,579,000)
Held-to-maturity securities, at Fair value	665,717,000	565,019,000	572,731,000
Municipal Securities
Available-for-sale securities
Amortized Cost	133,006,000	113,197,000	113,796,000
Gross Unrealized Gains	1,481,000	2,712,000	2,493,000
Gross Unrealized Losses	(1,114,000)	(557,000)	(273,000)
Available-for-sale securities, at fair value	133,373,000	115,352,000	116,016,000
Held-to-maturity securities
Amortized Cost	253,015,000	247,387,000	234,279,000
Gross Unrealized Gains	629,000	2,668,000	2,185,000
Gross Unrealized Losses	(7,764,000)	(2,558,000)	(2,159,000)
Held-to-maturity securities, at Fair value	245,880,000	247,497,000	234,305,000
Corporate notes, Financial issuers
Available-for-sale securities
Amortized Cost	97,085,000	30,309,000	60,325,000
Gross Unrealized Gains	87,000	43,000	63,000
Gross Unrealized Losses	(4,719,000)	(301,000)	(771,000)
Available-for-sale securities, at fair value	92,453,000	30,051,000	59,617,000
Corporate notes, Other
Available-for-sale securities
Amortized Cost	1,000,000	1,000,000	1,000,000
Gross Unrealized Gains	0	0	0
Gross Unrealized Losses	0	(1,000)	(3,000)
Available-for-sale securities, at fair value	1,000,000	999,000	997,000
Mortgage-backed securities
Available-for-sale securities
Amortized Cost	1,744,600,000	1,291,695,000	1,114,655,000
Gross Unrealized Gains	121,000	446,000	1,477,000
Gross Unrealized Losses	(87,950,000)	(31,955,000)	(30,436,000)
Available-for-sale securities, at fair value	1,656,771,000	1,260,186,000	1,085,696,000
Collateralized mortgage obligations
Available-for-sale securities
Amortized Cost	47,909,000	60,092,000	63,934,000
Gross Unrealized Gains	4,000	64,000	230,000
Gross Unrealized Losses	(2,306,000)	(617,000)	(412,000)
Available-for-sale securities, at fair value	45,607,000	59,539,000	63,752,000
Equity securities
Available-for-sale securities
Amortized Cost	0	34,234,000	33,166,000
Gross Unrealized Gains	0	3,357,000	3,867,000
Gross Unrealized Losses	0	(789,000)	(681,000)
Available-for-sale securities, at fair value	0	36,802,000	36,352,000
Mortgage-backed securities, subprime
Available-for-sale securities
Available-for-sale securities, at fair value	$ 0	$ 0	$ 0

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Investment Securities (Continuous Unrealized Loss Position, Fair Value) (Detail) $ in Thousands	Sep. 30, 2018 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Continuous unrealized losses existing for less than 12 months, Fair value	$ 841,018
Continuous unrealized losses existing for less than 12 months, Unrealized losses	(22,007)
Continuous unrealized losses existing for greater than 12 months, Fair value	1,220,743
Continuous unrealized losses existing for greater than 12 months, Unrealized losses	(75,459)
Total, Fair value	2,061,761
Total, Unrealized losses	(97,466)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	445,486
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(16,171)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	450,855
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(39,299)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	896,341
Held-to-maturity Securities, Continuous Unrealized Loss Position, Unrealized Losses	(55,470)
U.S. Treasury
Schedule of Available-for-sale Securities [Line Items]
Continuous unrealized losses existing for less than 12 months, Fair value	100,008
Continuous unrealized losses existing for less than 12 months, Unrealized losses	(131)
Continuous unrealized losses existing for greater than 12 months, Fair value	24,753
Continuous unrealized losses existing for greater than 12 months, Unrealized losses	(261)
Total, Fair value	124,761
Total, Unrealized losses	(392)
U.S. Government agencies
Schedule of Available-for-sale Securities [Line Items]
Continuous unrealized losses existing for less than 12 months, Fair value	37,672
Continuous unrealized losses existing for less than 12 months, Unrealized losses	(914)
Continuous unrealized losses existing for greater than 12 months, Fair value	70,032
Continuous unrealized losses existing for greater than 12 months, Unrealized losses	(71)
Total, Fair value	107,704
Total, Unrealized losses	(985)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	298,736
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(12,317)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	366,981
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(35,389)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	665,717
Held-to-maturity Securities, Continuous Unrealized Loss Position, Unrealized Losses	(47,706)
Municipal Securities
Schedule of Available-for-sale Securities [Line Items]
Continuous unrealized losses existing for less than 12 months, Fair value	38,774
Continuous unrealized losses existing for less than 12 months, Unrealized losses	(553)
Continuous unrealized losses existing for greater than 12 months, Fair value	20,489
Continuous unrealized losses existing for greater than 12 months, Unrealized losses	(561)
Total, Fair value	59,263
Total, Unrealized losses	(1,114)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	146,750
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	(3,854)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	83,874
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized Losses	(3,910)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	230,624
Held-to-maturity Securities, Continuous Unrealized Loss Position, Unrealized Losses	(7,764)
Corporate notes, Financial issuers
Schedule of Available-for-sale Securities [Line Items]
Continuous unrealized losses existing for less than 12 months, Fair value	68,639
Continuous unrealized losses existing for less than 12 months, Unrealized losses	(4,475)
Continuous unrealized losses existing for greater than 12 months, Fair value	3,730
Continuous unrealized losses existing for greater than 12 months, Unrealized losses	(244)
Total, Fair value	72,369
Total, Unrealized losses	(4,719)
Corporate notes, Other
Schedule of Available-for-sale Securities [Line Items]
Continuous unrealized losses existing for less than 12 months, Fair value	0
Continuous unrealized losses existing for less than 12 months, Unrealized losses	0
Continuous unrealized losses existing for greater than 12 months, Fair value	0
Continuous unrealized losses existing for greater than 12 months, Unrealized losses	0
Total, Fair value	0
Total, Unrealized losses	0
Mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Continuous unrealized losses existing for less than 12 months, Fair value	573,401
Continuous unrealized losses existing for less than 12 months, Unrealized losses	(14,706)
Continuous unrealized losses existing for greater than 12 months, Fair value	1,079,068
Continuous unrealized losses existing for greater than 12 months, Unrealized losses	(73,244)
Total, Fair value	1,652,469
Total, Unrealized losses	(87,950)
Collateralized mortgage obligations
Schedule of Available-for-sale Securities [Line Items]
Continuous unrealized losses existing for less than 12 months, Fair value	22,524
Continuous unrealized losses existing for less than 12 months, Unrealized losses	(1,228)
Continuous unrealized losses existing for greater than 12 months, Fair value	22,671
Continuous unrealized losses existing for greater than 12 months, Unrealized losses	(1,078)
Total, Fair value	45,195
Total, Unrealized losses	$ (2,306)

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Investment Securities (Schedule of Realized Gain (Loss)) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Available-for-sale Securities and Held-to-maturity Securities [Abstract]
Realized gains on investment securities	$ 1,051	$ 58	$ 1,057	$ 106
Realized losses on investment securities	(50)	(19)	(1,051)	(75)
Net realized gains on investment securities	1,001	39	6	31
Unrealized gains on equity securities with readily determinable fair value	530	0	2,632	0
Unrealized losses on equity securities with readily determinable fair value	(1,111)	0	(2,176)	0
Net unrealized (losses) gains on equity securities with readily determinable fair value	(581)	0	456	0
Upward adjustments of equity securities without readily determinable fair values	0	0	156	0
Downward adjustments of equity securities without readily determinable fair values	0	0	0	0
Impairment of equity securities without readily determinable fair values	(330)	0	(867)	0
Adjustment and impairment, net, of equity securities without readily determinable fair values	(330)	0	(711)	0
Other than temporary impairment charges	0	0	0	0
Gains (losses) on investment securities, net	90	39	(249)	31
Proceeds from sales of available-for-sale securities	649	133,089	209,640	121,795
Proceeds from sales of equity securities with readily determinable fair value	1,895	0	1,895	0
Proceeds from sales and capital distributions of equity securities without readily determinable fair value	$ 64	$ 0	$ 680	$ 0

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Investment Securities (Investments Classified by Contractual Maturity Date) (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Schedule of Available-for-sale Securities [Line Items]
Due in one year or less, Amortized Cost	$ 128,184	$ 300,833	$ 150,907
Due in one to five years, Amortized Cost	174,968	97,019	282,443
Due in five to ten years, Amortized Cost	118,229	33,947	38,339
Due after ten years, Amortized Cost	46,860	15,249	8,188
Amortized Cost	2,260,750	1,833,069	1,691,632
Due in one year or less, Fair Value	127,844	299,285	150,241
Due in one to five years, Fair Value	174,877	97,326	282,121
Due in five to ten years, Fair Value	113,875	35,029	39,458
Due after ten years, Fair Value	46,011	15,499	8,283
Available-for-sale securities	2,164,985	1,803,666	1,665,903
Held-to-maturity securities, Due in one year or less, Amortized Cost	5,521	170	170
Held-to-maturity securities, Due in one to five years, Amortized Cost	31,782	38,392	36,914
Held-to-maturity securities, Due in five to ten years, Amortized Cost	255,146	205,227	193,387
Held-to-maturity securities, Due after ten years, Amortized Cost	673,989	582,660	588,869
Amortized Cost	966,438	826,449	819,340
Held-to-maturity securities, Due in one year or less, Fair Value	5,511	171	171
Held-to-maturity securities, Due in one to five years, Fair Value	31,160	38,012	36,734
Held-to-maturity securities, Due in five to ten years, Fair Value	243,608	203,680	192,581
Held-to-maturity securities, Due after ten years, Fair Value	631,318	570,653	577,550
Held-to-maturity securities, Fair Value	911,597	812,516	807,036
Mortgage-backed
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,792,509	1,351,787	1,178,589
Available-for-sale securities	1,702,378	1,319,725	1,149,448
Equity securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	0	34,234	33,166
Available-for-sale securities	$ 0	$ 36,802	$ 36,352

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Investment Securities (Narrative) (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($) security	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) security	Sep. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)
Available-for-sale Securities and Held-to-maturity Securities [Abstract]
Impairment of equity securities without readily determinable fair values	$ (330,000)	$ 0	$ (867,000)	$ 0
Equity securities with readily determinable fair value	26,600,000		26,600,000
Upward adjustments of equity securities without readily determinable fair values	0	0	156,000	0
Downward adjustments of equity securities without readily determinable fair values	0		0
Impairment of equity securities without readily determinable fair values	330,000	0	867,000	0
Pledged Securities, carrying value	$ 1,700,000,000	$ 1,600,000,000	$ 1,700,000,000	$ 1,600,000,000	$ 1,700,000,000
Number of securities by a single non-government sponsored issuer exceeding 10% of shareholders' equity | security	0		0

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Loans (Summary of Loan Portfolio) (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Loans [Line Items]
Loans, net of unearned income, excluding covered loans	$ 23,123,951	$ 21,640,797	$ 20,912,781
Covered loans	0	0	46,601
Total loans	$ 23,123,951	$ 21,640,797	$ 20,959,382
Total loans, net of unearned income, excluding covered loans	100.00%	100.00%	100.00%
Covered loans	0.00%	0.00%	0.00%
Total loans	100.00%	100.00%	100.00%
Commercial
Loans [Line Items]
Loans, net of unearned income, excluding covered loans	$ 7,473,958	$ 6,787,677	$ 6,456,034
Total loans, net of unearned income, excluding covered loans	32.00%	31.00%	31.00%
Commercial real estate
Loans [Line Items]
Loans, net of unearned income, excluding covered loans	$ 6,746,774	$ 6,580,618	$ 6,400,781
Total loans, net of unearned income, excluding covered loans	29.00%	30.00%	31.00%
Home equity
Loans [Line Items]
Loans, net of unearned income, excluding covered loans	$ 578,844	$ 663,045	$ 672,969
Total loans, net of unearned income, excluding covered loans	3.00%	3.00%	3.00%
Residential real estate
Loans [Line Items]
Loans, net of unearned income, excluding covered loans	$ 924,250	$ 832,120	$ 789,499
Total loans, net of unearned income, excluding covered loans	4.00%	4.00%	3.00%
Premium finance receivables—commercial | Commercial insurance loans
Loans [Line Items]
Loans, net of unearned income, excluding covered loans	$ 2,885,327	$ 2,634,565	$ 2,664,912
Total loans, net of unearned income, excluding covered loans	12.00%	12.00%	13.00%
Premium finance receivables—commercial | Life insurance
Loans [Line Items]
Loans, net of unearned income, excluding covered loans	$ 4,398,971	$ 4,035,059	$ 3,795,474
Total loans, net of unearned income, excluding covered loans	19.00%	19.00%	18.00%
Consumer and other
Loans [Line Items]
Loans, net of unearned income, excluding covered loans	$ 115,827	$ 107,713	$ 133,112
Total loans, net of unearned income, excluding covered loans	1.00%	1.00%	1.00%

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Loans (Schedule of Unpaid Principal Balance And Carrying Value Of Acquired Loans) (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Loans and Leases Receivable Disclosure [Abstract]
Unpaid Principal Balance	$ 325,019	$ 375,237
Carrying Value	$ 304,726	$ 350,690

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Loans (Schedule of Loans Acquired with Deteriorated Credit Quality) (Details) - Delaware Place Bank $ in Thousands	Aug. 01, 2018 USD ($)
Business Acquisition [Line Items]
Contractually required payments including interest	$ 13,367
Less: Nonaccretable difference	1,197
Cash flows expected to be collected	12,170
Less: Accretable yield	2,321
Fair value of PCI loans acquired	$ 9,849

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Loans (Activity Related to Accretable Yield of Loans Acquired With Evidence of Credit Quality Deterioration Since Origination) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Accretable yield, beginning balance	$ 34,347	$ 45,510	$ 36,565	$ 49,408
Acquisitions	2,321	0	2,321	426
Accretable yield amortized to interest income	(4,144)	(5,025)	(12,915)	(16,101)
Accretable yield amortized to indemnification asset/liability	0	(371)	0	(1,086)
Reclassification from non-accretable difference	1,734	1,017	4,596	7,106
Increases in interest cash flows due to payments and changes in interest rates	(1,093)	(875)	2,598	503
Accretable yield, ending balance	$ 33,165	$ 40,256	$ 33,165	$ 40,256

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Loans (Narrative) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Schedule Of Accretable Yield Activity Related to Loans Acquired With Evidence Of Credit Quality Deterioration Since Origination Table [Line Items]
Net deferred loan fees and costs and fair value accounting adjustments	$ 6,500	$ 8,000	$ 6,500	$ 8,000	$ 9,300
Accretable yield amortized to interest income	4,144	5,025	12,915	16,101
Premium finance receivables
Schedule Of Accretable Yield Activity Related to Loans Acquired With Evidence Of Credit Quality Deterioration Since Origination Table [Line Items]
Unearned income portion of premium finance receivables	$ 98,100	$ 80,400	$ 98,100	$ 80,400	$ 87,000

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Allowance for Loan Losses, Allowance for Losses on Lending-Related Commitments and Impaired Loans (Schedule of Aging of the Company's Loan Portfolio) (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	$ 114,844	$ 77,602	$ 63,436
90+ days and still accruing	23,260	22,659	29,830
Current	22,834,140	21,408,938	20,769,265
Loans, net of unearned income, excluding covered loans	23,123,951	21,640,797	20,912,781
Total loans, nonaccrual status, excluding covered loans			61,500
Total loans, 90 plus days, excluding covered loans			27,597
Total loans, current, excluding covered loans			20,727,952
Covered loans, Nonaccrual			1,936
Covered loans, 90 plus days and still accruing			2,233
Covered loans, Current			41,313
Covered loans	0	0	46,601
Total loans	23,123,951	21,640,797	20,959,382
60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	42,344	33,260	23,058
Total loans, 60-89 days past due, excluding covered loans			21,984
Covered loans, 60-89 days past due			1,074
30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	109,363	98,338	73,793
Total loans, 30-59 days past due, excluding covered loans			73,748
Covered loans, 30-59 days past due			45
Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	58,587	15,696	13,931
90+ days and still accruing	8,494	877	1,489
Current	7,375,123	6,737,479	6,399,128
Loans, net of unearned income, excluding covered loans	7,473,958	6,787,677	6,456,034
Commercial | 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	6,140	4,218	5,036
Commercial | 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	25,614	29,407	36,450
Commercial | Commercial, industrial and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	41,322	11,260	12,281
90+ days and still accruing	0	0	0
Current	4,745,178	4,314,107	4,091,381
Loans, net of unearned income, excluding covered loans	4,805,486	4,342,505	4,120,533
Commercial | Commercial, industrial and other | 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2,535	3,746	3,161
Commercial | Commercial, industrial and other | 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	16,451	13,392	13,710
Commercial | Franchise
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	16,351	2,447	0
90+ days and still accruing	5,122	0	0
Current	915,817	845,150	836,997
Loans, net of unearned income, excluding covered loans	937,290	847,597	853,716
Commercial | Franchise | 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0	0
Commercial | Franchise | 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0	16,719
Commercial | Mortgage warehouse lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	0	0	0
90+ days and still accruing	0	0	0
Current	168,860	190,523	194,058
Loans, net of unearned income, excluding covered loans	171,860	194,523	194,370
Commercial | Mortgage warehouse lines of credit | 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	3,000	0	0
Commercial | Mortgage warehouse lines of credit | 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	4,000	312
Commercial | Asset-based lending
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	910	1,550	1,141
90+ days and still accruing	0	0	0
Current	1,023,268	968,576	889,147
Loans, net of unearned income, excluding covered loans	1,033,851	980,466	896,336
Commercial | Asset-based lending | 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	590	283	1,533
Commercial | Asset-based lending | 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	9,083	10,057	4,515
Commercial | Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	4	439	509
90+ days and still accruing	0	0	0
Current	509,591	410,772	379,410
Loans, net of unearned income, excluding covered loans	509,675	413,172	381,394
Commercial | Leases | 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	3	281
Commercial | Leases | 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	80	1,958	1,194
Commercial | PCI - commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	0	0	0
90+ days and still accruing	3,372	877	1,489
Current	12,409	8,351	8,135
Loans, net of unearned income, excluding covered loans	15,796	9,414	9,685
Commercial | PCI - commercial | 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	15	186	61
Commercial | PCI - commercial | 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0	0
Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	17,515	22,048	14,878
90+ days and still accruing	5,578	7,135	8,443
Current	6,652,557	6,517,763	6,354,667
Loans, net of unearned income, excluding covered loans	6,746,774	6,580,618	6,400,781
Commercial real estate | 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	27,040	4,346	5,838
Commercial real estate | 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	44,084	29,326	16,955
Commercial real estate | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	1,554	3,143	1,607
90+ days and still accruing	0	0	0
Current	778,725	742,171	669,940
Loans, net of unearned income, excluding covered loans	798,330	745,514	673,977
Commercial real estate | Construction | 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,823	0	366
Commercial real estate | Construction | 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	16,228	200	2,064
Commercial real estate | Land
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	228	188	196
90+ days and still accruing	0	0	0
Current	118,411	121,140	102,557
Loans, net of unearned income, excluding covered loans	119,004	126,484	102,753
Commercial real estate | Land | 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	365	0	0
Commercial real estate | Land | 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	5,156	0
Commercial real estate | Office
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	1,532	2,438	5,148
90+ days and still accruing	0	0	0
Current	932,166	887,937	874,583
Loans, net of unearned income, excluding covered loans	940,777	894,833	880,951
Commercial real estate | Office | 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4,058	0	0
Commercial real estate | Office | 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	3,021	4,458	1,220
Commercial real estate | Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	178	811	1,848
90+ days and still accruing	0	0	0
Current	885,486	879,796	834,062
Loans, net of unearned income, excluding covered loans	885,931	883,019	836,485
Commercial real estate | Industrial | 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	122	0	137
Commercial real estate | Industrial | 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	145	2,412	438
Commercial real estate | Retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	10,586	12,328	2,200
90+ days and still accruing	0	0	0
Current	861,901	938,383	925,335
Loans, net of unearned income, excluding covered loans	887,702	951,527	934,239
Commercial real estate | Retail | 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4,570	668	3,030
Commercial real estate | Retail | 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	10,645	148	3,674
Commercial real estate | Multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	318	0	569
90+ days and still accruing	0	0	0
Current	922,413	914,610	861,290
Loans, net of unearned income, excluding covered loans	923,893	915,644	864,985
Commercial real estate | Multi-family | 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0	68
Commercial real estate | Multi-family | 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,162	1,034	3,058
Commercial real estate | Mixed use and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	3,119	3,140	3,310
90+ days and still accruing	0	0	0
Current	2,062,179	1,921,501	1,966,601
Loans, net of unearned income, excluding covered loans	2,086,455	1,935,705	1,974,315
Commercial real estate | Mixed use and other | 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	9,654	1,423	843
Commercial real estate | Mixed use and other | 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	11,503	9,641	3,561
Commercial real estate | PCI - commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	0	0	0
90+ days and still accruing	5,578	7,135	8,443
Current	91,276	112,225	120,299
Loans, net of unearned income, excluding covered loans	104,682	127,892	133,076
Commercial real estate | PCI - commercial real estate | 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	6,448	2,255	1,394
Commercial real estate | PCI - commercial real estate | 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,380	6,277	2,940
Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	8,523	8,978	7,581
90+ days and still accruing	0	0	0
Current	565,768	648,915	662,352
Loans, net of unearned income, excluding covered loans	578,844	663,045	672,969
Home equity | 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,075	518	446
Home equity | 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	3,478	4,634	2,590
Residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	16,062	17,977	14,743
90+ days and still accruing	1,865	5,304	1,120
Current	904,006	799,158	771,416
Loans, net of unearned income, excluding covered loans	924,250	832,120	789,499
Residential real estate | 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,714	1,303	2,055
Residential real estate | 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	603	8,378	165
Premium finance receivables | Commercial insurance loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	13,802	12,163	9,827
90+ days and still accruing	7,028	9,242	9,584
Current	2,845,313	2,579,515	2,628,114
Loans, net of unearned income, excluding covered loans	2,885,327	2,634,565	2,664,912
Premium finance receivables | Commercial insurance loans | 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	5,945	17,796	7,421
Premium finance receivables | Commercial insurance loans | 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	13,239	15,849	9,966
Premium finance receivables | Life insurance loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	0	0	0
90+ days and still accruing	0	0	6,740
Current	4,203,465	3,820,936	3,571,388
Loans, net of unearned income, excluding covered loans	4,225,481	3,835,790	3,586,011
Premium finance receivables | Life insurance loans | 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	4,837	946
Premium finance receivables | Life insurance loans | 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	22,016	10,017	6,937
Premium finance receivables | PCI - life insurance loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	0	0	0
90+ days and still accruing	0	0	0
Current	173,490	199,269	209,463
Loans, net of unearned income, excluding covered loans	173,490	199,269	209,463
Premium finance receivables | PCI - life insurance loans | 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0	0
Premium finance receivables | PCI - life insurance loans | 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0	0
Consumer and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	355	740	540
90+ days and still accruing	295	101	221
Current	114,418	105,903	131,424
Loans, net of unearned income, excluding covered loans	115,827	107,713	133,112
Consumer and other | 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	430	242	242
Consumer and other | 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 329	$ 727	$ 685

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Allowance for Loan Losses, Allowance for Losses on Lending-Related Commitments and Impaired Loans (Summary of Performance by Loan Class) (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	$ 23,123,951	$ 21,640,797	$ 20,912,781
Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	7,473,958	6,787,677	6,456,034
Commercial | Commercial, industrial and other
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	4,805,486	4,342,505	4,120,533
Commercial | Franchise
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	937,290	847,597	853,716
Commercial | Mortgage warehouse lines of credit
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	171,860	194,523	194,370
Commercial | Asset-based lending
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	1,033,851	980,466	896,336
Commercial | Leases
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	509,675	413,172	381,394
Commercial | PCI - commercial
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	15,796	9,414	9,685
Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	6,746,774	6,580,618	6,400,781
Commercial real estate | Construction
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	798,330	745,514	673,977
Commercial real estate | Land
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	119,004	126,484	102,753
Commercial real estate | Office
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	940,777	894,833	880,951
Commercial real estate | Industrial
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	885,931	883,019	836,485
Commercial real estate | Retail
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	887,702	951,527	934,239
Commercial real estate | Multi-family
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	923,893	915,644	864,985
Commercial real estate | Mixed use and other
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	2,086,455	1,935,705	1,974,315
Commercial real estate | PCI - commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	104,682	127,892	133,076
Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	578,844	663,045	672,969
Residential real estate
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	924,250	832,120	789,499
Premium finance receivables | Commercial insurance loans
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	2,885,327	2,634,565	2,664,912
Premium finance receivables | Life insurance loans
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	4,225,481	3,835,790	3,586,011
Premium finance receivables | PCI - life insurance loans
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	173,490	199,269	209,463
Consumer and other
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	115,827	107,713	133,112
Performing
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	22,996,724	21,550,635	20,834,798
Performing | Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	7,410,249	6,771,981	6,442,103
Performing | Commercial | Commercial, industrial and other
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	4,764,164	4,331,245	4,108,252
Performing | Commercial | Franchise
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	915,817	845,150	853,716
Performing | Commercial | Mortgage warehouse lines of credit
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	171,860	194,523	194,370
Performing | Commercial | Asset-based lending
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	1,032,941	978,916	895,195
Performing | Commercial | Leases
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	509,671	412,733	380,885
Performing | Commercial | PCI - commercial
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	15,796	9,414	9,685
Performing | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	6,729,259	6,558,570	6,385,903
Performing | Commercial real estate | Construction
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	796,776	742,371	672,370
Performing | Commercial real estate | Land
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	118,776	126,296	102,557
Performing | Commercial real estate | Office
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	939,245	892,395	875,803
Performing | Commercial real estate | Industrial
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	885,753	882,208	834,637
Performing | Commercial real estate | Retail
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	877,116	939,199	932,039
Performing | Commercial real estate | Multi-family
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	923,575	915,644	864,416
Performing | Commercial real estate | Mixed use and other
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	2,083,336	1,932,565	1,971,005
Performing | Commercial real estate | PCI - commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	104,682	127,892	133,076
Performing | Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	570,321	654,067	665,388
Performing | Residential real estate
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	908,188	810,865	774,756
Performing | Premium finance receivables | Commercial insurance loans
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	2,864,497	2,613,160	2,645,501
Performing | Premium finance receivables | Life insurance loans
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	4,225,481	3,835,790	3,579,271
Performing | Premium finance receivables | PCI - life insurance loans
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	173,490	199,269	209,463
Performing | Consumer and other
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	115,239	106,933	132,413
Non-performing
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	127,227	90,162	77,983
Non-performing | Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	63,709	15,696	13,931
Non-performing | Commercial | Commercial, industrial and other
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	41,322	11,260	12,281
Non-performing | Commercial | Franchise
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	21,473	2,447	0
Non-performing | Commercial | Mortgage warehouse lines of credit
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	0	0	0
Non-performing | Commercial | Asset-based lending
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	910	1,550	1,141
Non-performing | Commercial | Leases
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	4	439	509
Non-performing | Commercial | PCI - commercial
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	0	0	0
Non-performing | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	17,515	22,048	14,878
Non-performing | Commercial real estate | Construction
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	1,554	3,143	1,607
Non-performing | Commercial real estate | Land
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	228	188	196
Non-performing | Commercial real estate | Office
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	1,532	2,438	5,148
Non-performing | Commercial real estate | Industrial
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	178	811	1,848
Non-performing | Commercial real estate | Retail
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	10,586	12,328	2,200
Non-performing | Commercial real estate | Multi-family
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	318	0	569
Non-performing | Commercial real estate | Mixed use and other
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	3,119	3,140	3,310
Non-performing | Commercial real estate | PCI - commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	0	0	0
Non-performing | Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	8,523	8,978	7,581
Non-performing | Residential real estate
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	16,062	21,255	14,743
Non-performing | Premium finance receivables | Commercial insurance loans
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	20,830	21,405	19,411
Non-performing | Premium finance receivables | Life insurance loans
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	0	0	6,740
Non-performing | Premium finance receivables | PCI - life insurance loans
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	0	0	0
Non-performing | Consumer and other
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income, excluding covered loans	$ 588	$ 780	$ 699

XML

Allowance for Loan Losses, Allowance for Losses on Lending-Related Commitments and Impaired Loans (Summary of Activity in the Allowance for Credit Losses) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses at beginning of period	$ 143,402	$ 129,591	$ 137,905	$ 122,291
Other adjustments	(18)	(39)	(102)	(125)
Reclassification from allowance for unfunded lending-related commitments	(2)	94	24	62
Charge-offs	(6,981)	(6,418)	(23,129)	(16,563)
Recoveries	2,313	1,949	10,627	5,244
Provision for credit losses	11,042	7,942	24,431	22,210
Allowance for loan losses at period end	149,756	133,119	149,756	133,119
Allowance for unfunded lending-related commitments at period end	1,245	1,276	1,245	1,276
Allowance for credit losses at period end	151,001	134,395	151,001	134,395
Individually evaluated for impairment	14,375	7,235	14,375	7,235
Collectively evaluated for impairment	135,942	126,446	135,942	126,446
Loans at period end, Individually evaluated for impairment	132,799	79,320	132,799	79,320
Loans at period end, Collectively evaluated for impairment	22,608,543	20,447,199	22,608,543	20,447,199
Loans held at fair value	77,883	29,414	77,883	29,414
Receivables Acquired with Deteriorated Credit Quality
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses at period end	684	714	684	714
Loans at period end, Loans acquired with deteriorated credit quality	304,726	356,848	304,726	356,848
Commercial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses at beginning of period	60,727	52,358	57,811	44,493
Other adjustments	(1)	(2)	(3)	(23)
Reclassification from allowance for unfunded lending-related commitments	0	500	0	500
Charge-offs	(3,219)	(2,265)	(8,116)	(3,819)
Recoveries	304	801	1,232	1,635
Provision for credit losses	8,934	4,343	15,821	12,949
Allowance for loan losses at period end	66,745	55,735	66,745	55,735
Allowance for unfunded lending-related commitments at period end	0	0	0	0
Allowance for credit losses at period end	66,745	55,735	66,745	55,735
Individually evaluated for impairment	10,164	4,568	10,164	4,568
Collectively evaluated for impairment	55,987	50,623	55,987	50,623
Loans at period end, Individually evaluated for impairment	67,381	18,086	67,381	18,086
Loans at period end, Collectively evaluated for impairment	7,390,781	6,428,263	7,390,781	6,428,263
Loans held at fair value	0	0	0	0
Commercial | Receivables Acquired with Deteriorated Credit Quality
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses at period end	594	544	594	544
Loans at period end, Loans acquired with deteriorated credit quality	15,796	9,685	15,796	9,685
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses at beginning of period	57,660	52,339	55,227	51,422
Other adjustments	(15)	(38)	(66)	(121)
Reclassification from allowance for unfunded lending-related commitments	(2)	(406)	24	(438)
Charge-offs	(208)	(989)	(1,176)	(3,235)
Recoveries	193	323	4,267	1,153
Provision for credit losses	619	811	(29)	3,259
Allowance for loan losses at period end	58,247	52,040	58,247	52,040
Allowance for unfunded lending-related commitments at period end	1,245	1,276	1,245	1,276
Allowance for credit losses at period end	59,492	53,316	59,492	53,316
Individually evaluated for impairment	3,158	1,184	3,158	1,184
Collectively evaluated for impairment	56,316	52,048	56,316	52,048
Loans at period end, Individually evaluated for impairment	31,952	31,698	31,952	31,698
Loans at period end, Collectively evaluated for impairment	6,610,140	6,236,007	6,610,140	6,236,007
Loans held at fair value	0	0	0	0
Commercial real estate | Receivables Acquired with Deteriorated Credit Quality
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses at period end	18	84	18	84
Loans at period end, Loans acquired with deteriorated credit quality	104,682	133,076	104,682	133,076
Home equity
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses at beginning of period	9,551	11,134	10,493	11,774
Other adjustments	(2)	0	(2)	0
Reclassification from allowance for unfunded lending-related commitments	0	0	0	0
Charge-offs	(561)	(968)	(1,530)	(3,224)
Recoveries	142	178	436	387
Provision for credit losses	13	212	(254)	1,619
Allowance for loan losses at period end	9,143	10,556	9,143	10,556
Allowance for unfunded lending-related commitments at period end	0	0	0	0
Allowance for credit losses at period end	9,143	10,556	9,143	10,556
Individually evaluated for impairment	611	691	611	691
Collectively evaluated for impairment	8,532	9,865	8,532	9,865
Loans at period end, Individually evaluated for impairment	11,284	7,729	11,284	7,729
Loans at period end, Collectively evaluated for impairment	567,560	665,240	567,560	665,240
Loans held at fair value	0	0	0	0
Home equity | Receivables Acquired with Deteriorated Credit Quality
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses at period end	0	0	0	0
Loans at period end, Loans acquired with deteriorated credit quality	0	0	0	0
Residential real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses at beginning of period	6,336	6,143	6,688	5,714
Other adjustments	(14)	(31)	(19)	(38)
Reclassification from allowance for unfunded lending-related commitments	0	0	0	0
Charge-offs	(337)	(267)	(1,088)	(742)
Recoveries	466	55	2,028	287
Provision for credit losses	(160)	757	(1,318)	1,436
Allowance for loan losses at period end	6,291	6,657	6,291	6,657
Allowance for unfunded lending-related commitments at period end	0	0	0	0
Allowance for credit losses at period end	6,291	6,657	6,291	6,657
Individually evaluated for impairment	325	758	325	758
Collectively evaluated for impairment	5,894	5,813	5,894	5,813
Loans at period end, Individually evaluated for impairment	21,781	21,263	21,781	21,263
Loans at period end, Collectively evaluated for impairment	815,442	735,185	815,442	735,185
Loans held at fair value	77,883	29,414	77,883	29,414
Residential real estate | Receivables Acquired with Deteriorated Credit Quality
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses at period end	72	86	72	86
Loans at period end, Loans acquired with deteriorated credit quality	9,144	3,637	9,144	3,637
Premium finance receivables
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses at beginning of period	7,734	6,352	6,846	7,625
Other adjustments	14	32	(12)	57
Reclassification from allowance for unfunded lending-related commitments	0	0	0	0
Charge-offs	(2,512)	(1,716)	(10,487)	(5,021)
Recoveries	1,142	499	2,502	1,515
Provision for credit losses	1,796	1,386	9,325	2,377
Allowance for loan losses at period end	8,174	6,553	8,174	6,553
Allowance for unfunded lending-related commitments at period end	0	0	0	0
Allowance for credit losses at period end	8,174	6,553	8,174	6,553
Individually evaluated for impairment	0	0	0	0
Collectively evaluated for impairment	8,174	6,553	8,174	6,553
Loans at period end, Individually evaluated for impairment	0	0	0	0
Loans at period end, Collectively evaluated for impairment	7,110,808	6,250,923	7,110,808	6,250,923
Loans held at fair value	0	0	0	0
Premium finance receivables | Receivables Acquired with Deteriorated Credit Quality
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses at period end	0	0	0	0
Loans at period end, Loans acquired with deteriorated credit quality	173,490	209,463	173,490	209,463
Consumer and other
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses at beginning of period	1,394	1,265	840	1,263
Other adjustments	0	0	0	0
Reclassification from allowance for unfunded lending-related commitments	0	0	0	0
Charge-offs	(144)	(213)	(732)	(522)
Recoveries	66	93	162	267
Provision for credit losses	(160)	433	886	570
Allowance for loan losses at period end	1,156	1,578	1,156	1,578
Allowance for unfunded lending-related commitments at period end	0	0	0	0
Allowance for credit losses at period end	1,156	1,578	1,156	1,578
Individually evaluated for impairment	117	34	117	34
Collectively evaluated for impairment	1,039	1,544	1,039	1,544
Loans at period end, Individually evaluated for impairment	401	544	401	544
Loans at period end, Collectively evaluated for impairment	113,812	13,581	113,812	13,581
Loans held at fair value	0	0	0	0
Consumer and other | Receivables Acquired with Deteriorated Credit Quality
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses at period end	0	0	0	0
Loans at period end, Loans acquired with deteriorated credit quality	$ 1,614	$ 987	$ 1,614	$ 987

XML

Allowance for Loan Losses, Allowance for Losses on Lending-Related Commitments and Impaired Loans (Summary of Activity in the Allowance for Covered Loan Losses) (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017
Allowance for Covered Loan Losses [Roll Forward]
Balance at beginning of period	$ 1,074	$ 1,322
Provision for covered loan losses before benefit attributable to FDIC loss share agreements	(225)	(1,063)
Benefit attributable to FDIC loss share agreements	180	850
Net provision for covered loan losses	(45)	(213)
Increase in FDIC indemnification liability	(180)	(850)
Loans charged-off	(155)	(491)
Recoveries of loans charged-off	64	990
Net (charge-offs) recoveries	(91)	499
Balance at end of period	$ 758	$ 758

XML

Allowance for Loan Losses, Allowance for Losses on Lending-Related Commitments and Impaired Loans (Summary of Impaired Loans, Including Restructured Loans) (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Financing Receivable, Impaired [Line Items]
Impaired loans with an allowance for loan loss required	$ 83,349	$ 36,084	$ 30,864
Impaired loans with no allowance for loan loss required	49,173	69,004	47,730
Total impaired loans	132,522	105,088	78,594
Allowance for loan losses related to impaired loans	14,365	8,023	7,218
Financing Receivable
Financing Receivable, Impaired [Line Items]
Allowance for loan losses related to impaired loans	3,900
TDRs	$ 66,219	$ 49,786	$ 33,183

XML

Allowance for Loan Losses, Allowance for Losses on Lending-Related Commitments and Impaired Loans (Summary of Impaired Loans by Loan Class) (Detail) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	$ 83,349	$ 30,864	$ 36,084
Impaired Financing Receivable, Related Allowance	14,365	7,218	8,023
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	49,173	47,730	69,004
Total impaired loans	132,522	78,594	105,088
Impaired Financing Receivable, Unpaid Principal Balance	145,561	91,091	127,566
Impaired Financing Receivable, Average Recorded Investment	134,975	84,905	115,261
Impaired Financing Receivable, Interest Income Recognized	5,768	3,424	6,298
Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		0
Impaired Financing Receivable, Related Allowance		0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		0
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized		0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		0
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		0
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized		0
Commercial | Commercial, industrial and other
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	36,564	7,312	6,233
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	36,699	8,458	7,323
Impaired Financing Receivable, Related Allowance	8,242	4,191	3,951
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	30,259	8,390	7,220
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized	1,404	407	452
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	5,758	5,995	8,460
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	7,022	7,260	12,259
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	9,325	6,662	10,170
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized	465	294	683
Commercial | Franchise
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	16,316		0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	18,504		0
Impaired Financing Receivable, Related Allowance	1,638		0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	18,387		0
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized	771		0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	5,157		16,256
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	5,158		16,256
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	5,376		17,089
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized	302		780
Commercial | Asset-based lending
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	646	588	948
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	646	589	949
Impaired Financing Receivable, Related Allowance	283	161	355
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	724	588	1,302
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized	39	21	72
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	264	553	602
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	1,088	553	602
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	1,623	728	688
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized	89	31	40
Commercial | Leases
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	1,777	2,440	2,331
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	1,777	2,444	2,337
Impaired Financing Receivable, Related Allowance	1	215	158
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	1,836	2,539	2,463
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized	69	91	117
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	899	817	782
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	930	817	782
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	974	862	845
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized	43	38	49
Commercial real estate | Construction
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	1,554	1,607	3,097
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	1,554	2,408	3,897
Impaired Financing Receivable, Related Allowance	390	94	403
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	1,554	2,319	3,690
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized	56	93	197
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	1,117	1,504	1,367
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	1,117	1,504	1,678
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	1,252	1,524	1,555
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized	40	49	84
Commercial real estate | Land
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	1,375	0	0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	1,375	0	0
Impaired Financing Receivable, Related Allowance	1	0	0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	1,508	0	0
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized	53	0	0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	2,325	3,968	3,961
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	2,431	4,217	4,192
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	2,366	4,110	4,129
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized	98	136	182
Commercial real estate | Office
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	579	2,225	471
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	647	2,291	471
Impaired Financing Receivable, Related Allowance	26	570	5
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	591	2,280	481
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized	19	94	24
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	1,532	3,400	2,438
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	2,077	3,585	6,140
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	1,541	3,565	3,484
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized	86	147	330
Commercial real estate | Industrial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	45	408	408
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	154	408	408
Impaired Financing Receivable, Related Allowance	1	75	40
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	56	415	414
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized	6	19	25
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	178	1,440	403
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	195	2,729	2,010
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	188	2,885	1,849
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized	9	183	174
Commercial real estate | Retail
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	15,325	5,932	15,599
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	15,567	6,072	15,657
Impaired Financing Receivable, Related Allowance	2,413	158	1,336
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	15,376	5,998	15,736
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized	535	191	624
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	777	1,978	2,393
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	946	1,988	3,538
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	874	2,008	2,486
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized	42	103	221
Commercial real estate | Multi-family
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	1,197	1,239	0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	1,197	1,239	0
Impaired Financing Receivable, Related Allowance	8	8	0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	1,209	1,250	0
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized	32	33	0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	318	569	1,231
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	412	653	2,078
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	329	571	1,246
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized	9	23	76
Commercial real estate | Mixed use and other
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	1,590	1,537	1,567
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	1,801	1,695	1,586
Impaired Financing Receivable, Related Allowance	309	263	379
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	1,754	1,580	1,599
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized	76	60	77
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	3,763	5,546	5,275
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	4,362	6,267	6,731
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	3,950	5,745	5,559
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized	194	241	351
Home equity
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	2,287	1,511	1,606
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	2,651	1,721	1,869
Impaired Financing Receivable, Related Allowance	611	691	784
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	2,303	1,528	1,626
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized	78	53	81
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	8,997	6,218	7,648
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	12,131	9,523	11,648
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	9,015	7,231	9,114
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized	462	339	603
Residential real estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	3,977	5,842	3,798
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	4,291	6,154	3,910
Impaired Financing Receivable, Related Allowance	325	758	586
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	3,998	5,842	3,790
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized	128	177	146
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	17,804	15,421	17,455
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	20,291	17,859	20,327
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	18,193	15,726	17,926
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized	643	575	860
Consumer and other
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	117	223	26
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	130	224	28
Impaired Financing Receivable, Related Allowance	117	34	26
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	119	225	27
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized	5	10	2
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	284	321	733
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	408	433	890
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	295	334	773
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized	$ 15	$ 16	$ 48

XML

Allowance for Loan Losses, Allowance for Losses on Lending-Related Commitments and Impaired Loans (Narrative) (Detail)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018 USD ($) contracts	Sep. 30, 2017 USD ($) contracts	Sep. 30, 2018 USD ($) contracts	Sep. 30, 2017 USD ($) contracts	Sep. 30, 2018 USD ($) Loan	Sep. 30, 2017 USD ($) Loan	Dec. 31, 2017 USD ($)
Financing Receivable, Allowance for Credit Losses [Line Items]
TDRs, number	22	5	41	13	49	19
Allowance for loan losses related to impaired loans	$ 14,365,000	$ 7,218,000	$ 14,365,000	$ 7,218,000	$ 14,365,000	$ 7,218,000	$ 8,023,000
TDRs, Additions	$ 4,233,000	$ 1,663,000	$ 24,828,000	$ 5,386,000	43,767,000	8,834,000
Weighted average extension term	72 months	36 months	64 months	36 months
Weighted average stated interest rate, basis points	1.40%	2.25%	1.60%	1.88%
Loan forgiveness	$ 0	$ 73,000	$ 0	$ 73,000
Financing Receivable
Financing Receivable, Allowance for Credit Losses [Line Items]
TDRs	66,219,000	33,183,000	66,219,000	33,183,000	66,219,000	33,183,000	$ 49,786,000
Allowance for loan losses related to impaired loans	3,900,000		3,900,000		3,900,000
Interest income, passage of time	32,000	68,000	89,000	172,000
Residential Real Estate | Financing Receivable
Financing Receivable, Allowance for Credit Losses [Line Items]
Foreclosed residential properties	5,700,000		5,700,000		5,700,000
In process other real estate owned	$ 14,200,000	$ 12,100,000	$ 14,200,000	$ 12,100,000	$ 14,200,000	$ 12,100,000

XML

Allowance for Loan Losses, Allowance for Losses on Lending-Related Commitments and Impaired Loans (Summary of the Post-Modification Balance of TDRs) (Detail) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018 USD ($) contracts	Sep. 30, 2017 USD ($) contracts	Sep. 30, 2018 USD ($) contracts	Sep. 30, 2017 USD ($) contracts	Sep. 30, 2018 USD ($) Loan	Sep. 30, 2017 USD ($) Loan
Financing Receivable, Modifications [Line Items]
TDRs, number	22	5	41	13	49	19
TDRs, Additions	$ 4,233	$ 1,663	$ 24,828	$ 5,386	$ 43,767	$ 8,834
Extension at Below Market Terms
Financing Receivable, Modifications [Line Items]
TDRs, number | contracts	22	1	38	9
TDRs, Additions	$ 4,233	$ 186	$ 6,956	$ 3,909
Reduction of Interest Rate
Financing Receivable, Modifications [Line Items]
TDRs, number | contracts	7	2	13	7
TDRs, Additions	$ 621	$ 255	$ 1,502	$ 2,589
Modification to Interest Only Payments
Financing Receivable, Modifications [Line Items]
TDRs, number | contracts	0	3	3	3
TDRs, Additions	$ 0	$ 1,408	$ 17,872	$ 1,408
Forgiveness of Debt
Financing Receivable, Modifications [Line Items]
TDRs, number | contracts	0	1	0	1
TDRs, Additions	$ 0	$ 69	$ 0	$ 69
Residential real estate and other
Financing Receivable, Modifications [Line Items]
TDRs, number	20	2	31	8	35	12
TDRs, Additions	$ 3,679	$ 255	$ 5,846	$ 2,638	$ 6,257	$ 3,137
Residential real estate and other | Extension at Below Market Terms
Financing Receivable, Modifications [Line Items]
TDRs, number | contracts	20	1	31	7
TDRs, Additions	$ 3,679	$ 186	$ 5,846	$ 2,569
Residential real estate and other | Reduction of Interest Rate
Financing Receivable, Modifications [Line Items]
TDRs, number | contracts	7	2	12	7
TDRs, Additions	$ 621	$ 255	$ 1,417	$ 2,589
Residential real estate and other | Modification to Interest Only Payments
Financing Receivable, Modifications [Line Items]
TDRs, number | contracts	0	0	0	0
TDRs, Additions	$ 0	$ 0	$ 0	$ 0
Residential real estate and other | Forgiveness of Debt
Financing Receivable, Modifications [Line Items]
TDRs, number | contracts	0	1	0	1
TDRs, Additions	$ 0	$ 69	$ 0	$ 69
Commercial, industrial and other | Commercial
Financing Receivable, Modifications [Line Items]
TDRs, number	1	3	4	4	5	4
TDRs, Additions	$ 519	$ 1,408	$ 13,442	$ 1,503	$ 15,714	$ 1,503
Commercial, industrial and other | Commercial | Extension at Below Market Terms
Financing Receivable, Modifications [Line Items]
TDRs, number | contracts	1	0	3	1
TDRs, Additions	$ 519	$ 0	$ 692	$ 95
Commercial, industrial and other | Commercial | Reduction of Interest Rate
Financing Receivable, Modifications [Line Items]
TDRs, number | contracts	0	0	0	0
TDRs, Additions	$ 0	$ 0	$ 0	$ 0
Commercial, industrial and other | Commercial | Modification to Interest Only Payments
Financing Receivable, Modifications [Line Items]
TDRs, number | contracts	0	3	1	3
TDRs, Additions	$ 0	$ 1,408	$ 12,750	$ 1,408
Commercial, industrial and other | Commercial | Forgiveness of Debt
Financing Receivable, Modifications [Line Items]
TDRs, number | contracts	0	0	0	0
TDRs, Additions	$ 0	$ 0	$ 0	$ 0
Franchise | Commercial
Financing Receivable, Modifications [Line Items]
TDRs, number	1	0	3	0	6	0
TDRs, Additions	$ 35	$ 0	$ 5,157	$ 0	$ 21,413	$ 0
Franchise | Commercial | Extension at Below Market Terms
Financing Receivable, Modifications [Line Items]
TDRs, number | contracts	1	0	1	0
TDRs, Additions	$ 35	$ 0	$ 35	$ 0
Franchise | Commercial | Reduction of Interest Rate
Financing Receivable, Modifications [Line Items]
TDRs, number | contracts	0	0	0	0
TDRs, Additions	$ 0	$ 0	$ 0	$ 0
Franchise | Commercial | Modification to Interest Only Payments
Financing Receivable, Modifications [Line Items]
TDRs, number | contracts	0	0	2	0
TDRs, Additions	$ 0	$ 0	$ 5,122	$ 0
Franchise | Commercial | Forgiveness of Debt
Financing Receivable, Modifications [Line Items]
TDRs, number | contracts	0	0	0	0
TDRs, Additions	$ 0	$ 0	$ 0	$ 0
Leases | Commercial
Financing Receivable, Modifications [Line Items]
TDRs, number	0	0	1	0	1	2
TDRs, Additions	$ 0	$ 0	$ 239	$ 0	$ 239	$ 2,949
Leases | Commercial | Extension at Below Market Terms
Financing Receivable, Modifications [Line Items]
TDRs, number | contracts	0	0	1	0
TDRs, Additions	$ 0	$ 0	$ 239	$ 0
Leases | Commercial | Reduction of Interest Rate
Financing Receivable, Modifications [Line Items]
TDRs, number | contracts	0	0	0	0
TDRs, Additions	$ 0	$ 0	$ 0	$ 0
Leases | Commercial | Modification to Interest Only Payments
Financing Receivable, Modifications [Line Items]
TDRs, number | contracts	0	0	0	0
TDRs, Additions	$ 0	$ 0	$ 0	$ 0
Leases | Commercial | Forgiveness of Debt
Financing Receivable, Modifications [Line Items]
TDRs, number | contracts	0	0	0	0
TDRs, Additions	$ 0	$ 0	$ 0	$ 0
Office | Commercial real estate
Financing Receivable, Modifications [Line Items]
TDRs, number	0	0	1	0	1	0
TDRs, Additions	$ 0	$ 0	$ 59	$ 0	$ 59	$ 0
Office | Commercial real estate | Extension at Below Market Terms
Financing Receivable, Modifications [Line Items]
TDRs, number | contracts	0	0	1	0
TDRs, Additions	$ 0	$ 0	$ 59	$ 0
Office | Commercial real estate | Reduction of Interest Rate
Financing Receivable, Modifications [Line Items]
TDRs, number | contracts	0	0	0	0
TDRs, Additions	$ 0	$ 0	$ 0	$ 0
Office | Commercial real estate | Modification to Interest Only Payments
Financing Receivable, Modifications [Line Items]
TDRs, number | contracts	0	0	0	0
TDRs, Additions	$ 0	$ 0	$ 0	$ 0
Office | Commercial real estate | Forgiveness of Debt
Financing Receivable, Modifications [Line Items]
TDRs, number | contracts	0	0	0	0
TDRs, Additions	$ 0	$ 0	$ 0	$ 0
Industrial | Commercial real estate
Financing Receivable, Modifications [Line Items]
TDRs, number | Loan					0
TDRs, Additions					$ 0
Mixed use and other | Commercial real estate
Financing Receivable, Modifications [Line Items]
TDRs, number	0	0	1	1	1	1
TDRs, Additions	$ 0	$ 0	$ 85	$ 1,245	$ 85	$ 1,245
Mixed use and other | Commercial real estate | Extension at Below Market Terms
Financing Receivable, Modifications [Line Items]
TDRs, number | contracts	0	0	1	1
TDRs, Additions	$ 0	$ 0	$ 85	$ 1,245
Mixed use and other | Commercial real estate | Reduction of Interest Rate
Financing Receivable, Modifications [Line Items]
TDRs, number | contracts	0	0	1	0
TDRs, Additions	$ 0	$ 0	$ 85	$ 0
Mixed use and other | Commercial real estate | Modification to Interest Only Payments
Financing Receivable, Modifications [Line Items]
TDRs, number | contracts	0	0	0	0
TDRs, Additions	$ 0	$ 0	$ 0	$ 0
Mixed use and other | Commercial real estate | Forgiveness of Debt
Financing Receivable, Modifications [Line Items]
TDRs, number | contracts	0	0	0	0
TDRs, Additions	$ 0	$ 0	$ 0	$ 0

XML

Allowance for Loan Losses, Allowance for Losses on Lending-Related Commitments and Impaired Loans (Summary of TDRs Subsequent Default Under the Restructured Terms) (Detail) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018 USD ($) Loan contracts	Sep. 30, 2017 USD ($) Loan contracts	Sep. 30, 2018 USD ($) Loan contracts	Sep. 30, 2017 USD ($) Loan contracts	Sep. 30, 2018 USD ($) Loan	Sep. 30, 2017 USD ($) Loan
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Total, Count	22	5	41	13	49	19
Total, Balance	$ 4,233	$ 1,663	$ 24,828	$ 5,386	$ 43,767	$ 8,834
Subsequent Default, Count | Loan	13	2	13	3
Subsequent Default, Balance	$ 9,111	$ 1,297	$ 9,111	$ 1,529
Commercial | Commercial, industrial and other
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Total, Count	1	3	4	4	5	4
Total, Balance	$ 519	$ 1,408	$ 13,442	$ 1,503	$ 15,714	$ 1,503
Subsequent Default, Count | Loan	3	0	3	0
Subsequent Default, Balance	$ 2,447	$ 0	$ 2,447	$ 0
Commercial | Franchise
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Total, Count	1	0	3	0	6	0
Total, Balance	$ 35	$ 0	$ 5,157	$ 0	$ 21,413	$ 0
Subsequent Default, Count | Loan	2	0	2	0
Subsequent Default, Balance	$ 5,122	$ 0	$ 5,122	$ 0
Commercial | Leases
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Total, Count	0	0	1	0	1	2
Total, Balance	$ 0	$ 0	$ 239	$ 0	$ 239	$ 2,949
Subsequent Default, Count | Loan	0	0	0	0
Subsequent Default, Balance	$ 0	$ 0	$ 0	$ 0
Commercial real estate | Office
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Total, Count	0	0	1	0	1	0
Total, Balance	$ 0	$ 0	$ 59	$ 0	$ 59	$ 0
Subsequent Default, Count | Loan	0	0	0	0
Subsequent Default, Balance	$ 0	$ 0	$ 0	$ 0
Commercial real estate | Industrial
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Total, Count | Loan					0
Total, Balance					$ 0
Subsequent Default, Count | Loan	0		0
Subsequent Default, Balance	$ 0		$ 0
Commercial real estate | Mixed use and other
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Total, Count	0	0	1	1	1	1
Total, Balance	$ 0	$ 0	$ 85	$ 1,245	$ 85	$ 1,245
Subsequent Default, Count | Loan	1	1	1	1
Subsequent Default, Balance	$ 85	$ 1,245	$ 85	$ 1,245
Residential real estate and other
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Total, Count	20	2	31	8	35	12
Total, Balance	$ 3,679	$ 255	$ 5,846	$ 2,638	$ 6,257	$ 3,137
Subsequent Default, Count | Loan	7	1	7	2
Subsequent Default, Balance	$ 1,457	$ 52	$ 1,457	$ 284

XML

Goodwill And Other Intangible Assets (Goodwill Assets by Business Segment) (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 501,884
Goodwill Acquired	36,307
Impairment Loss	0
Goodwill Adjustments	(631)
Ending balance	537,560
Community banking
Goodwill [Roll Forward]
Beginning balance	429,520
Goodwill Acquired	36,307
Impairment Loss	0
Goodwill Adjustments	0
Ending balance	465,827
Specialty finance
Goodwill [Roll Forward]
Beginning balance	40,250
Goodwill Acquired	0
Impairment Loss	0
Goodwill Adjustments	(631)
Ending balance	39,619
Wealth management
Goodwill [Roll Forward]
Beginning balance	32,114
Goodwill Acquired	0
Impairment Loss	0
Goodwill Adjustments	0
Ending balance	$ 32,114

XML

Goodwill And Other Intangible Assets (Narrative) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Indefinite-lived Intangible Assets [Line Items]
Goodwill increase (decrease) due to foreign currency translation adjustments			$ (631)
Amortization of other intangible assets	$ 1,163	$ 1,068	3,164	$ 3,373
Community banking
Indefinite-lived Intangible Assets [Line Items]
Goodwill increase			36,300
Goodwill increase (decrease) due to foreign currency translation adjustments			$ 0
Community banking | Core deposit intangibles
Indefinite-lived Intangible Assets [Line Items]
Amortization period in years, other intangible assets			10 years
Specialty finance
Indefinite-lived Intangible Assets [Line Items]
Goodwill increase (decrease) due to foreign currency translation adjustments			$ (631)
Specialty finance | Customer list intangibles
Indefinite-lived Intangible Assets [Line Items]
Amortization period in years, other intangible assets			18 years
Wealth management
Indefinite-lived Intangible Assets [Line Items]
Goodwill increase (decrease) due to foreign currency translation adjustments			$ 0
Wealth management | Customer list intangibles
Indefinite-lived Intangible Assets [Line Items]
Amortization period in years, other intangible assets			10 years

XML

Goodwill And Other Intangible Assets (Summary of Intangible Assets) (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Finite-Lived Intangible Assets [Line Items]
Total other intangible assets, net	$ 27,378	$ 17,621	$ 18,651
Community banking
Finite-Lived Intangible Assets [Line Items]
Total net carrying amount	22,053	11,845	12,722
Trademark | Community banking
Finite-Lived Intangible Assets [Line Items]
Carrying amount	5,800	0	0
Core deposit intangibles | Community banking
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	44,395	37,272	37,272
Accumulated amortization	(28,142)	(25,427)	(24,550)
Net carrying amount	16,253	11,845	12,722
Customer list intangibles | Specialty finance
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	1,967	1,972	1,972
Accumulated amortization	(1,407)	(1,298)	(1,258)
Net carrying amount	560	674	714
Customer list and other intangibles | Wealth management
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	7,940	7,940	7,940
Accumulated amortization	(3,175)	(2,838)	(2,725)
Net carrying amount	$ 4,765	$ 5,102	$ 5,215

XML

Goodwill And Other Intangible Assets (Estimated Amortization) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Actual in nine months ended September 30, 2018	$ 1,163	$ 1,068	$ 3,164	$ 3,373
Estimated remaining in 2018	1,253		1,253
Estimated—2019	4,517		4,517
Estimated—2020	3,681		3,681
Estimated—2021	3,014		3,014
Estimated—2022	$ 2,388		$ 2,388

XML

Mortgage Servicing Rights ("MSRs") (Schedule Of Changes In Carrying Value Of MSR) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance at beginning of the period	$ 63,194	$ 27,307	$ 33,676	$ 19,103
Additions from loans sold with servicing retained	11,340	4,948	23,388	13,162
Additions from acquisitions	0	0	13,806	0
Estimate of changes in fair value due to:
Payoffs and paydowns	(1,081)	(641)	(3,647)	(1,632)
Changes in valuation inputs or assumptions	1,077	(2,200)	7,307	(1,219)
Fair value at end of the period	74,530	29,414	74,530	29,414
Unpaid principal balance of mortgage loans serviced for others	$ 5,904,300	$ 2,622,411	$ 5,904,300	$ 2,622,411

XML

Deposits (Summary of Deposits) (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Balance:
Non-interest bearing	$ 6,399,213	$ 6,792,497	$ 6,502,409
NOW and interest bearing demand deposits	2,512,259	2,315,055	2,273,025
Wealth management deposits	2,520,120	2,323,699	2,171,758
Money market	5,429,921	4,515,353	4,607,995
Savings	2,595,164	2,829,373	2,673,201
Time certificates of deposit	5,460,038	4,407,370	4,666,675
Total deposits	$ 24,916,715	$ 23,183,347	$ 22,895,063
Mix:
Non-interest bearing	26.00%	29.00%	28.00%
NOW and interest bearing demand deposits	10.00%	10.00%	10.00%
Wealth management deposits	10.00%	10.00%	10.00%
Money market	22.00%	20.00%	20.00%
Savings	10.00%	12.00%	12.00%
Time certificates of deposit	22.00%	19.00%	20.00%
Total deposits	100.00%	100.00%	100.00%

XML

FHLB Advances, Other Borrowings and Subordinated Notes (Summary of Debt) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 18, 2018	Dec. 31, 2017	Sep. 30, 2017	Dec. 15, 2014
Debt Disclosure [Abstract]
FHLB advances	$ 615,000		$ 559,663	$ 468,962
Other borrowings:
Notes payable	149,799	$ 150,000	41,222	41,216	$ 150,000
Short-term borrowings	17,431		17,209	19,959
Other	48,043		49,131	49,502
Secured borrowings	158,298		158,561	141,003
Total other borrowings	373,571		266,123	251,680
Subordinated notes	139,172		139,088	139,052
Total FHLB advances, other borrowings and subordinated notes	$ 1,127,743		$ 964,874	$ 859,694

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FHLB Advances, Other Borrowings and Subordinated Notes (Narrative) (Details) $ in Thousands, $ in Millions	1 Months Ended			9 Months Ended
	Jun. 30, 2018 CAD ($)	Dec. 31, 2017 CAD ($)	Dec. 31, 2015 CAD ($)	Sep. 30, 2018 USD ($) Rate	Sep. 30, 2018 CAD ($)	Sep. 18, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2017 CAD ($)	Sep. 30, 2017 USD ($)	Dec. 31, 2014 CAD ($)	Dec. 15, 2014 USD ($)
Debt Instrument [Line Items]
Notes payable				$ 149,799		$ 150,000	$ 41,222		$ 41,216		$ 150,000
Short-term borrowings				17,431			17,209		19,959
Other				48,043			49,131		49,502
Secured borrowings				158,298			158,561		141,003
Subordinated notes				139,172			139,088		139,052
Revolving Credit Facility
Debt Instrument [Line Items]
Notes payable						50,000					75,000
Term Facility
Debt Instrument [Line Items]
Notes payable				$ 149,800		150,000	41,200		41,200		$ 75,000
Base Rate Loan | Federal Funds Rate
Debt Instrument [Line Items]
Basis spread on variable rate				0.50%
Base Rate Loan | Eurodollar Rate
Debt Instrument [Line Items]
Basis spread on variable rate				1.00%
Line of Credit | Credit Agreement
Debt Instrument [Line Items]
Loan agreement with unaffiliated banks						$ 200,000
Term Facility | Base Rate Loan | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate				0.75%
Term Facility | Eurodollar Rate Loan | Eurodollar Rate
Debt Instrument [Line Items]
Basis spread on variable rate				1.25%
Revolving Credit Facility
Debt Instrument [Line Items]
Commitment fee (as a percent) | Rate				0.20%
Revolving Credit Facility | Base Rate Loan | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate				0.50%
Revolving Credit Facility | Eurodollar Rate Loan | Eurodollar Rate
Debt Instrument [Line Items]
Basis spread on variable rate				1.25%
Securities sold under repurchase agreements
Debt Instrument [Line Items]
Securities sold under agreements to repurchase				$ 17,400			17,200		20,000
Pledged financial instruments				35,900
Fixed Rate Promissory Note
Debt Instrument [Line Items]
Other				$ 48,000			49,000		49,300
Fixed rate (as a percent)				3.36%	3.36%
Non Recourse Debt
Debt Instrument [Line Items]
Other							151		225
Secured Debt
Debt Instrument [Line Items]
Secured borrowings				$ 11,100
Secured Debt | Receivables Purchase Agreement
Debt Instrument [Line Items]
Fixed rate (as a percent)				2.7189%	2.7189%
Secured borrowings			$ 160	$ 147,200	$ 190		$ 135,100	$ 170	$ 128,300	$ 150
Additional amount paid by third party	$ 20	$ 10	$ 10
Subordinated Debt
Debt Instrument [Line Items]
Fixed rate (as a percent)				5.00%	5.00%

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FHLB Advances, Other Borrowings and Subordinated Notes (Summary of Pledged Securities Related to Securities Sold Under Repurchase Agreements) (Details) - Securities sold under repurchase agreements - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged financial instruments	$ 35,900
Securities sold under agreements to repurchase	17,400	$ 17,200	$ 20,000
Overnight Sweep Collateral
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged financial instruments	35,911
Excess collateral	18,480
Securities sold under agreements to repurchase	17,431
Overnight Sweep Collateral | Available-for-sale securities pledged | Mortgage-backed securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged financial instruments	9,547
Overnight Sweep Collateral | Held-to-maturity securities pledged | U.S. Government agencies
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged financial instruments	$ 26,364

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Junior Subordinated Debentures (Narrative) (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($) trust Rate	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)
Subordinated Borrowing [Line Items]
Percentage ownership interest in subsidiary trusts	100.00%
Number of unconsolidated subsidiary trusts | trust	11
Common securities, approximate percentage of junior subordinated debentures	3.00%
Trust preferred securities, approximate percentage of junior subordinated debentures	97.00%
Junior subordinated debentures	$ 253,566	$ 253,566	$ 253,566
Junior Subordinated Debt
Subordinated Borrowing [Line Items]
Junior subordinated debentures	$ 253,566
Debt, weighted average interest rate (as a percent) | Rate	4.55%
Period of deferred payment, not to exceed	60 months
Tier two risk based capital	$ 245,500

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Junior Subordinated Debentures (Summary of Junior Subordinated Debentures) (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Subordinated Borrowing [Line Items]
Junior Subordinated Debentures	$ 253,566,000	$ 253,566,000	$ 253,566,000
Junior Subordinated Debt
Subordinated Borrowing [Line Items]
Junior Subordinated Debentures	$ 253,566,000
Debt, weighted average interest rate (as a percent)	4.55%
Junior Subordinated Debt | Wintrust Capital Trust III
Subordinated Borrowing [Line Items]
Common Securities	$ 774,000
Trust Preferred Securities	25,000,000
Junior Subordinated Debentures	$ 25,774,000
Contractual rate (as a percent)	5.59%
Junior Subordinated Debt | Wintrust Capital Trust III | London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure, incremental interest rate over base rate (as a percent)	3.25%
Junior Subordinated Debt | Wintrust Statutory Trust IV
Subordinated Borrowing [Line Items]
Common Securities	$ 619,000
Trust Preferred Securities	20,000,000
Junior Subordinated Debentures	$ 20,619,000
Contractual rate (as a percent)	5.20%
Junior Subordinated Debt | Wintrust Statutory Trust IV | London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure, incremental interest rate over base rate (as a percent)	2.80%
Junior Subordinated Debt | Wintrust Statutory Trust V
Subordinated Borrowing [Line Items]
Common Securities	$ 1,238,000
Trust Preferred Securities	40,000,000
Junior Subordinated Debentures	$ 41,238,000
Contractual rate (as a percent)	5.00%
Junior Subordinated Debt | Wintrust Statutory Trust V | London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure, incremental interest rate over base rate (as a percent)	2.60%
Junior Subordinated Debt | Wintrust Capital Trust VII
Subordinated Borrowing [Line Items]
Common Securities	$ 1,550,000
Trust Preferred Securities	50,000,000
Junior Subordinated Debentures	$ 51,550,000
Contractual rate (as a percent)	4.28%
Junior Subordinated Debt | Wintrust Capital Trust VII | London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure, incremental interest rate over base rate (as a percent)	1.95%
Junior Subordinated Debt | Wintrust Capital Trust VIII
Subordinated Borrowing [Line Items]
Common Securities	$ 1,238,000
Trust Preferred Securities	25,000,000
Junior Subordinated Debentures	$ 26,238,000
Contractual rate (as a percent)	3.85%
Junior Subordinated Debt | Wintrust Capital Trust VIII | London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure, incremental interest rate over base rate (as a percent)	1.45%
Junior Subordinated Debt | Wintrust Capital Trust IX
Subordinated Borrowing [Line Items]
Common Securities	$ 1,547,000
Trust Preferred Securities	50,000,000
Junior Subordinated Debentures	$ 51,547,000
Contractual rate (as a percent)	3.96%
Junior Subordinated Debt | Wintrust Capital Trust IX | London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure, incremental interest rate over base rate (as a percent)	1.63%
Junior Subordinated Debt | Northview Capital Trust I
Subordinated Borrowing [Line Items]
Common Securities	$ 186,000
Trust Preferred Securities	6,000,000
Junior Subordinated Debentures	$ 6,186,000
Contractual rate (as a percent)	5.34%
Junior Subordinated Debt | Northview Capital Trust I | London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure, incremental interest rate over base rate (as a percent)	3.00%
Junior Subordinated Debt | Town Bankshares Capital Trust I
Subordinated Borrowing [Line Items]
Common Securities	$ 186,000
Trust Preferred Securities	6,000,000
Junior Subordinated Debentures	$ 6,186,000
Contractual rate (as a percent)	5.34%
Junior Subordinated Debt | Town Bankshares Capital Trust I | London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure, incremental interest rate over base rate (as a percent)	3.00%
Junior Subordinated Debt | First Northwest Capital Trust I
Subordinated Borrowing [Line Items]
Common Securities	$ 155,000
Trust Preferred Securities	5,000,000
Junior Subordinated Debentures	$ 5,155,000
Contractual rate (as a percent)	5.40%
Junior Subordinated Debt | First Northwest Capital Trust I | London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure, incremental interest rate over base rate (as a percent)	3.00%
Junior Subordinated Debt | Suburban Illinois Capital Trust II
Subordinated Borrowing [Line Items]
Common Securities	$ 464,000
Trust Preferred Securities	15,000,000
Junior Subordinated Debentures	$ 15,464,000
Contractual rate (as a percent)	4.08%
Junior Subordinated Debt | Suburban Illinois Capital Trust II | London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure, incremental interest rate over base rate (as a percent)	1.75%
Junior Subordinated Debt | Community Financial Shares Statutory Trust II
Subordinated Borrowing [Line Items]
Common Securities	$ 109,000
Trust Preferred Securities	3,500,000
Junior Subordinated Debentures	$ 3,609,000
Contractual rate (as a percent)	3.95%
Junior Subordinated Debt | Community Financial Shares Statutory Trust II | London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure, incremental interest rate over base rate (as a percent)	1.62%

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Revenue from Contracts with Customers - Disaggregation of Revenue by Source (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 38,722	$ 34,415	$ 114,313	$ 102,224
Mortgage broker fees
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	295	412	862	1,142
Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	9,331	8,645	27,339	25,606
Administrative services
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	1,099	1,052	3,365	3,062
Card related fees
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	2,328	1,471	5,583	4,315
Other deposit related fees
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	3,035	3,032	8,927	8,243
Wealth management
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	22,634	19,803	68,237	59,856
Wealth management | Brokerage and insurance product commissions
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	5,579	5,127	17,394	16,796
Wealth management | Trust
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	3,003	2,932	9,646	9,477
Wealth management | Asset management
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 14,052	$ 11,744	$ 41,197	$ 33,583

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Revenue from Contracts with Customers - Contract Assets, Contract Liabilities and Receivables from Contracts with Customers (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Revenue from Contract with Customer [Abstract]
Contract assets	$ 0	$ 0	$ 0
Contract liabilities	1,429	1,706	1,799
Mortgage broker fees receivable	9	69	69
Administrative services receivable	2,425	0	0
Wealth management receivable	7,779	8,102	7,443
Card related fees receivable	0	202	89
Total receivables from contracts with customer	$ 10,213	$ 8,373	$ 7,601

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Revenue from Contracts with Customers - Narrative (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($) subsidiary	Sep. 30, 2017 USD ($)
Revenue from Contract with Customer [Abstract]
Number of wealth management subsidiaries | subsidiary	3
Revenue recognized from contract liability balance | $	$ 278	$ 267

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Revenue from Contracts with Customers - Performance Obligations Unsatisfied at End of Period (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Estimated remaining performance period	3 months
Performance obligation unsatisfied or partially unsatisfied	$ 92
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Estimated remaining performance period	1 year
Performance obligation unsatisfied or partially unsatisfied	$ 369
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Estimated remaining performance period	1 year
Performance obligation unsatisfied or partially unsatisfied	$ 369
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Estimated remaining performance period	1 year
Performance obligation unsatisfied or partially unsatisfied	$ 303
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Estimated remaining performance period	1 year
Performance obligation unsatisfied or partially unsatisfied	$ 153
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Estimated remaining performance period	1 year
Performance obligation unsatisfied or partially unsatisfied	$ 1,429

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Segment Information (Narrative) (Detail)	9 Months Ended
	Sep. 30, 2018 segment subsidiary
Segment Reporting Information [Line Items]
Number of reportable segments	3
Number of subsidiaries | subsidiary	15
Community banking
Segment Reporting Information [Line Items]
Number of reportable segments	1

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Segment Information (Summary of Segment Information) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Net interest income:
Net interest income	$ 247,563	$ 215,988	$ 710,815	$ 612,977
Net interest income, Change in Contribution	$ 31,575		$ 97,838
Net interest income, Change in Contribution (as a percent)	15.00%		16.00%
Non-interest income:
Non-interest income	$ 99,930	79,731	$ 280,842	238,468
Non-interest income, Change in Contribution	$ 20,199		$ 42,374
Non-interest income, Change in Contribution (as a percent)	25.00%		18.00%
Net revenue:
Net revenue	$ 347,493	295,719	$ 991,657	851,445
Net revenue, Change in Contribution	$ 51,774		$ 140,212
Net revenue, Change in Contribution (as a percent)	18.00%		16.00%
Segment profit:
Segment profit	$ 91,948	65,626	$ 263,509	188,901
Segment profit, Change in Contribution	$ 26,322		$ 74,608
Segment profit, Change in Contribution (as a percent)	40.00%		39.00%
Segment assets:
Segment assets	$ 30,142,731	27,358,162	$ 30,142,731	27,358,162	$ 27,915,970
Segment assets, Change in Contribution	$ 2,784,569
Segment assets, Change in Contribution (as a percent)	10.00%
Community banking
Segment profit:
Segment profit	$ 63,735	44,799	187,395	128,502
Segment profit, Change in Contribution	$ 18,936		$ 58,893
Segment profit, Change in Contribution (as a percent)	42.00%		46.00%
Segment assets:
Segment assets	$ 24,590,027	22,426,049	$ 24,590,027	22,426,049
Segment assets, Change in Contribution	$ 2,163,978
Segment assets, Change in Contribution (as a percent)	10.00%
Specialty finance
Segment profit:
Segment profit	$ 22,971	17,043	61,482	47,990
Segment profit, Change in Contribution	$ 5,928		$ 13,492
Segment profit, Change in Contribution (as a percent)	35.00%		28.00%
Segment assets:
Segment assets	$ 4,897,664	4,305,960	$ 4,897,664	4,305,960
Segment assets, Change in Contribution	$ 591,704
Segment assets, Change in Contribution (as a percent)	14.00%
Wealth management
Segment profit:
Segment profit	$ 5,242	3,784	14,632	12,409
Segment profit, Change in Contribution	$ 1,458		$ 2,223
Segment profit, Change in Contribution (as a percent)	39.00%		18.00%
Segment assets:
Segment assets	$ 655,040	626,153	$ 655,040	626,153
Segment assets, Change in Contribution	$ 28,887
Segment assets, Change in Contribution (as a percent)	5.00%
Operating Segments
Net interest income:
Net interest income	$ 242,881	211,584	696,759	599,538
Net interest income, Change in Contribution	$ 31,297		$ 97,221
Net interest income, Change in Contribution (as a percent)	15.00%		16.00%
Non-interest income:
Non-interest income	$ 110,274	89,240	$ 310,822	266,215
Non-interest income, Change in Contribution	$ 21,034		$ 44,607
Non-interest income, Change in Contribution (as a percent)	24.00%		17.00%
Net revenue:
Net revenue	$ 353,155	300,824	$ 1,007,581	865,753
Net revenue, Change in Contribution	$ 52,331		$ 141,828
Net revenue, Change in Contribution (as a percent)	17.00%		16.00%
Operating Segments | Community banking
Net interest income:
Net interest income	$ 202,435	176,526	$ 583,926	499,135
Net interest income, Change in Contribution	$ 25,909		$ 84,791
Net interest income, Change in Contribution (as a percent)	15.00%		17.00%
Non-interest income:
Non-interest income	$ 69,776	52,554	$ 192,028	160,277
Non-interest income, Change in Contribution	$ 17,222		$ 31,751
Non-interest income, Change in Contribution (as a percent)	33.00%		20.00%
Net revenue:
Net revenue	$ 272,211	229,080	$ 775,954	659,412
Net revenue, Change in Contribution	$ 43,131		$ 116,542
Net revenue, Change in Contribution (as a percent)	19.00%		18.00%
Operating Segments | Specialty finance
Net interest income:
Net interest income	$ 36,398	30,501	$ 100,104	85,871
Net interest income, Change in Contribution	$ 5,897		$ 14,233
Net interest income, Change in Contribution (as a percent)	19.00%		17.00%
Non-interest income:
Non-interest income	$ 16,963	16,315	$ 49,005	44,192
Non-interest income, Change in Contribution	$ 648		$ 4,813
Non-interest income, Change in Contribution (as a percent)	4.00%		11.00%
Net revenue:
Net revenue	$ 53,361	46,816	$ 149,109	130,063
Net revenue, Change in Contribution	$ 6,545		$ 19,046
Net revenue, Change in Contribution (as a percent)	14.00%		15.00%
Operating Segments | Wealth management
Net interest income:
Net interest income	$ 4,048	4,557	$ 12,729	14,532
Net interest income, Change in Contribution	$ (509)		$ (1,803)
Net interest income, Change in Contribution (as a percent)	(11.00%)		(12.00%)
Non-interest income:
Non-interest income	$ 23,535	20,371	$ 69,789	61,746
Non-interest income, Change in Contribution	$ 3,164		$ 8,043
Non-interest income, Change in Contribution (as a percent)	16.00%		13.00%
Net revenue:
Net revenue	$ 27,583	24,928	$ 82,518	76,278
Net revenue, Change in Contribution	$ 2,655		$ 6,240
Net revenue, Change in Contribution (as a percent)	11.00%		8.00%
Intersegment Eliminations
Net interest income:
Net interest income	$ 4,682	4,404	$ 14,056	13,439
Net interest income, Change in Contribution	$ 278		$ 617
Net interest income, Change in Contribution (as a percent)	6.00%		5.00%
Non-interest income:
Non-interest income	$ (10,344)	(9,509)	$ (29,980)	(27,747)
Non-interest income, Change in Contribution	$ (835)		$ (2,233)
Non-interest income, Change in Contribution (as a percent)	(9.00%)		(8.00%)
Net revenue:
Net revenue	$ (5,662)	$ (5,105)	$ (15,924)	$ (14,308)
Net revenue, Change in Contribution	$ (557)		$ (1,616)
Net revenue, Change in Contribution (as a percent)	(11.00%)		(11.00%)

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Derivative Financial Instruments (Schedule Of Fair Value Of Derivative Financial Instruments) (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Derivative [Line Items]
Derivative assets	$ 96,153	$ 52,069	$ 48,198
Derivative liabilities	71,381	35,671	35,773
Interest Rate Contract
Derivative [Line Items]
Derivative assets	91,262	48,985	45,168
Derivative liabilities	69,342	33,716	34,035
Designated as Hedging Instrument
Derivative [Line Items]
Derivative assets	21,397	14,846	10,679
Derivative liabilities	0	12	53
Designated as Hedging Instrument | Interest Rate Contract | Cash Flow Hedging
Derivative [Line Items]
Derivative assets	16,271	11,914	8,643
Derivative liabilities	0	12	0
Designated as Hedging Instrument | Interest Rate Contract | Fair Value Hedging
Derivative [Line Items]
Derivative assets	5,126	2,932	2,036
Derivative liabilities	0	0	53
Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative assets	74,756	37,223	37,519
Derivative liabilities	71,381	35,659	35,720
Not Designated as Hedging Instrument | Interest Rate Contract
Derivative [Line Items]
Derivative assets	69,865	34,139	34,489
Derivative liabilities	69,342	33,704	33,982
Not Designated as Hedging Instrument | Interest Rate Lock Commitments
Derivative [Line Items]
Derivative assets	4,128	2,843	2,851
Derivative liabilities	0	269	1
Not Designated as Hedging Instrument | Forward Commitments to Sell Mortgage Loans
Derivative [Line Items]
Derivative assets	12	14	19
Derivative liabilities	1,330	1,457	1,495
Not Designated as Hedging Instrument | Foreign Exchange Contract
Derivative [Line Items]
Derivative assets	751	227	160
Derivative liabilities	$ 709	$ 229	$ 242

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Derivative Financial Instruments (Narrative) (Detail)	9 Months Ended
	Sep. 30, 2018 USD ($) derivative_instruments	Dec. 31, 2017 USD ($) derivative_instruments	Sep. 30, 2017 USD ($) derivative_instruments
Derivative Instruments, Gain (Loss) [Line Items]
Amount reclassified from accumulated other comprehensive income to interest expense in the next twelve months	$ 14,200,000
Net derivative liability position, aggregate fair value	162,000
Interest Rate Swap | Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Interest rate swap asset	$ 1,400,000
Number of derivative instruments held | derivative_instruments	1
Interest Rate Contract
Derivative Instruments, Gain (Loss) [Line Items]
Interest rate swap asset	$ 91,262,000	$ 48,985,000	$ 45,168,000
Interest Rate Contract | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	6,100,000,000
Forward Commitments to Sell Mortgage Loans | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	698,200,000
Interest Rate Lock Commitments | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	379,500,000
Foreign Exchange Contract | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	$ 37,900,000
Covered Call Options | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Number of derivative instruments held | derivative_instruments	0	0	0
Cash Flow Hedging | Cash flow hedge of variable rate deposits | Interest Rate Swap | Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Number of interest rate derivatives held | derivative_instruments	8
Cash Flow Hedging | Cash flow hedge of variable rate deposits | Interest Rate Collar | Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Number of interest rate derivatives held | derivative_instruments	1
Fair Value Hedging | Interest Rate Swap | Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Number of interest rate derivatives held | derivative_instruments	12
Carrying value of underlying loan	$ 5,082,000
Notional amount	164,200,000.0
Outstanding balance	$ 129,496,000
Fair Value Hedging | Interest Rate Swap | Effective After June 30, 2018 | Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Number of interest rate derivatives held | derivative_instruments	2
Notional amount	$ 55,300,000.0
Fair Value Hedging | Terminated Swap | Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Carrying value of underlying loan	$ (1,600,000)

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Derivative Financial Instruments (Schedule Of Cash Flow Hedging Instruments) (Detail) - Cash Flow Hedging - Designated as Hedging Instrument	Sep. 30, 2018 USD ($)
June 2019
Derivative [Line Items]
Notional Amount	$ 200,000,000
Fair Value Asset (Liability)	1,445,000
July 2019
Derivative [Line Items]
Notional Amount	250,000,000
Fair Value Asset (Liability)	3,275,000
August 2019
Derivative [Line Items]
Notional Amount	275,000,000
Fair Value Asset (Liability)	4,399,000
January 2020
Derivative [Line Items]
Notional Amount	175,000,000
Fair Value Asset (Liability)	1,554,000
January 2020
Derivative [Line Items]
Notional Amount	25,000,000
Fair Value Asset (Liability)	222,000
April 2020
Derivative [Line Items]
Notional Amount	50,000,000
Fair Value Asset (Liability)	317,000
April 2020
Derivative [Line Items]
Notional Amount	200,000,000
Fair Value Asset (Liability)	1,267,000
June 2020
Derivative [Line Items]
Notional Amount	200,000,000
Fair Value Asset (Liability)	3,741,000
September 2023
Derivative [Line Items]
Notional Amount	150,000,000
Fair Value Asset (Liability)	51,000
Total Cash Flow Hedges
Derivative [Line Items]
Notional Amount	1,525,000,000
Fair Value Asset (Liability)	$ 16,271,000

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Derivative Financial Instruments (Rollforward Of Amounts In Accumulated Other Comprehensive Income Related To Interest Rate Swaps Designated As Cash Flow Hedges) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Rollforward of AOCI from Cash Flow Hedging Derivatives [Roll Forward]
Amount of gain recognized in other comprehensive income	$ 155	$ 236	$ 3,196	$ 1,030
Interest Rate Contract
Rollforward of AOCI from Cash Flow Hedging Derivatives [Roll Forward]
Unrealized gain at beginning of period	16,059	8,249	11,902	6,944
Amount reclassified from accumulated other comprehensive loss to interest expense on deposits and junior subordinated debentures	(2,319)	14	(4,338)	1,051
Amount of gain recognized in other comprehensive income	2,531	380	8,707	648
Unrealized gain at end of period	$ 16,271	$ 8,643	$ 16,271	$ 8,643

XML

Derivative Financial Instruments (Schedule of Carrying Amount of Hedged Assets/(Liabilities)) (Detail) - Fair Value Hedging - Designated as Hedging Instrument - Interest Rate Swap $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018 USD ($)	Sep. 30, 2018 USD ($)
Derivative [Line Items]
Carrying Amount of the Hedged Assets/(Liabilities)	$ 129,496	$ 129,496
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities)		(5,082)
Cumulative Amount of Fair Value Hedging Adjustment Remaining for any Hedged Assets (Liabilities) for which Hedge Accounting has been Discontinued	0	0
Amount of Gain or (Loss) Recognized in Income on Derivative	$ (25)	$ (55)

XML

Derivative Financial Instruments (Summary Amounts Included In Consolidated Statement Of Income Related To Derivatives) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Interest rate swaps and caps | Trading (losses) gains, net
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) on derivative instruments	$ (55)	$ (94)	$ 89	$ (762)
Mortgage banking derivatives | Mortgage banking revenue
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) on derivative instruments	(1,122)	708	858	1,398
Covered call options | Fees from covered call options
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) on derivative instruments	627	1,143	2,893	2,792
Foreign exchange contracts | Trading (losses) gains, net
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) on derivative instruments	$ (18)	$ (23)	$ 51	$ (115)

XML

Derivative Financial Instruments (Derivative Asset and Liability Balance Sheet Offsetting) (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Offsetting Assets [Line Items]
Net amount presented in the Statements of Financial Condition	$ 96,153	$ 52,069	$ 48,198
Derivative Liabilities
Net amount presented in the Statements of Financial Condition	71,381	35,671	35,773
Interest Rate Contract
Offsetting Assets [Line Items]
Gross Amounts Recognized	91,262	48,985	45,168
Less: Amounts offset in the Statements of Financial Condition	0	0	0
Net amount presented in the Statements of Financial Condition	91,262	48,985	45,168
Offsetting Derivative Positions	(7,887)	(14,878)	(16,213)
Collateral Posted	(76,530)	(18,060)	(2,950)
Net Credit Exposure	6,845	16,047	26,005
Derivative Liabilities
Gross Amounts Recognized	69,342	33,716	34,035
Less: Amounts offset in the Statements of Financial Condition	0	0	0
Net amount presented in the Statements of Financial Condition	69,342	33,716	34,035
Offsetting Derivative Positions	(7,887)	(14,878)	(16,213)
Collateral Posted	(340)	(2,220)	(17,130)
Net Credit Exposure	$ 61,115	$ 16,618	$ 692

XML

Fair Values of Assets and Liabilities (Narrative) (Detail)	9 Months Ended
	Sep. 30, 2018 USD ($) $ / Loan	Jun. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	$ 2,164,985,000		$ 1,803,666,000	$ 1,665,903,000
Loans held-for-investment	77,883,000			29,414,000
MSRs	74,530,000	$ 63,194,000	33,676,000	29,414,000	$ 27,307,000	$ 19,103,000
Derivative assets	96,153,000		52,069,000	48,198,000
Mortgage loans held-for-sale, at fair value	338,111,000		313,592,000	370,282,000
Impaired loans—collateral based	132,522,000		105,088,000	78,594,000
Estimate of Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	2,164,985,000		1,803,666,000	1,665,903,000
MSRs	74,530,000		33,676,000	29,414,000
Remaining contractual principal balance outstanding, mortgage loans held-for-sale	317,400,000		299,500,000	356,400,000
Mortgage loans held-for-sale, at fair value	338,111,000		313,592,000	370,282,000
Portion at Other than Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans—collateral based	26,300,000
Non-performing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held-for-sale, at fair value	622,000		0	0
Measured at fair value on a recurring basis:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-investment	77,883,000		33,717,000	29,704,000
MSRs	74,530,000		33,676,000	29,414,000
Derivative assets	96,153,000		52,069,000	48,198,000
Mortgage loans held-for-sale, at fair value	338,111,000		313,592,000	370,282,000
Measured at fair value on a non-recurring basis:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans—collateral based	106,219,000
Other real estate owned	28,303,000
Level 3 | Measured at fair value on a recurring basis:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-investment	13,456,000		33,717,000	29,704,000
MSRs	74,530,000		33,676,000	29,414,000
Derivative assets	2,492,000		2,157,000	1,216,000
Mortgage loans held-for-sale, at fair value	$ 0		$ 0	$ 0
Level 3 | Measured at fair value on a recurring basis: | Minimum | Derivatives | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Pull-through rate (as a percent)	20.00%
Level 3 | Measured at fair value on a recurring basis: | Maximum | Derivatives | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Pull-through rate (as a percent)	100.00%
Level 3 | Measured at fair value on a recurring basis: | Weighted Average of Inputs | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost of servicing loan (in dollars per loan) | $ / Loan	78
Cost of servicing loan - delinquent (in dollars per loan) | $ / Loan	274
Level 3 | Measured at fair value on a recurring basis: | Weighted Average of Inputs | Derivatives | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Pull-through rate (as a percent)	91.12%
Level 3 | Measured at fair value on a non-recurring basis:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans—collateral based	$ 106,219,000
Other real estate owned	$ 28,303,000
Measurement Input, Discount Rate | Level 3 | Measured at fair value on a recurring basis: | Minimum | Loans held-for-investment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate input (as a percent)	0.04
Measurement Input, Discount Rate | Level 3 | Measured at fair value on a recurring basis: | Minimum | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate input (as a percent)	0.07
Measurement Input, Discount Rate | Level 3 | Measured at fair value on a recurring basis: | Maximum | Loans held-for-investment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate input (as a percent)	0.05
Measurement Input, Discount Rate | Level 3 | Measured at fair value on a recurring basis: | Maximum | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate input (as a percent)	0.18
Measurement Input, Discount Rate | Level 3 | Measured at fair value on a recurring basis: | Weighted Average of Inputs | Loans held-for-investment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate input (as a percent)	0.0457
Measurement Input, Discount Rate | Level 3 | Measured at fair value on a recurring basis: | Weighted Average of Inputs | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate input (as a percent)	0.1003
Measurement Input, Entity Credit Risk | Level 3 | Measured at fair value on a recurring basis: | Minimum | Loans held-for-investment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate input (as a percent)	0.00
Measurement Input, Entity Credit Risk | Level 3 | Measured at fair value on a recurring basis: | Maximum | Loans held-for-investment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate input (as a percent)	0.07
Measurement Input, Entity Credit Risk | Level 3 | Measured at fair value on a recurring basis: | Weighted Average of Inputs | Loans held-for-investment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate input (as a percent)	0.0100
Measurement Input, Constant Prepayment Rate | Level 3 | Measured at fair value on a recurring basis: | Loans held-for-investment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate input (as a percent)	0.1031
Measurement Input, Constant Prepayment Rate | Level 3 | Measured at fair value on a recurring basis: | Minimum | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate input (as a percent)	0.00
Measurement Input, Constant Prepayment Rate | Level 3 | Measured at fair value on a recurring basis: | Maximum | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate input (as a percent)	0.81
Measurement Input, Constant Prepayment Rate | Level 3 | Measured at fair value on a recurring basis: | Weighted Average of Inputs | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate input (as a percent)	0.1003
Measurement Input, Discount for Lack of Marketability | Other real estate owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Appraisal adjustment - cost of sale (as a percent)	0.10

XML

Fair Values of Assets and Liabilities (Summary of Balances of Assets and Liabilities Measured at Fair Value On A Recurring Basis) (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 2,164,985		$ 1,803,666	$ 1,665,903
Trading account securities	688		995	643
Equity securities with readily determinable fair value	36,414		0	0
Mortgage loans held-for-sale, at fair value	338,111		313,592	370,282
Loans held-for-investment	77,883			29,414
MSRs	74,530	$ 63,194	33,676	29,414	$ 27,307	$ 19,103
Derivative assets	96,153		52,069	48,198
Derivative liabilities	71,381		35,671	35,773
U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	124,761		143,822	144,145
U.S. Government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	111,020		156,915	159,328
Municipal Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	133,373		115,352	116,016
Mortgage-backed
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	1,702,378		1,319,725	1,149,448
Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0		36,802	36,352
Measured at fair value on a recurring basis:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading account securities	688		995	643
Equity securities with readily determinable fair value	36,414
Mortgage loans held-for-sale, at fair value	338,111		313,592	370,282
Loans held-for-investment	77,883		33,717	29,704
MSRs	74,530		33,676	29,414
Nonqualified deferred compensation assets	12,503		11,065	10,824
Derivative assets	96,153		52,069	48,198
Total financial assets	2,801,267		2,248,780	2,154,968
Derivative liabilities	71,381		35,671	35,773
Measured at fair value on a recurring basis: | U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	124,761		143,822	144,145
Measured at fair value on a recurring basis: | U.S. Government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	111,020		156,915	159,328
Measured at fair value on a recurring basis: | Municipal Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	133,373		115,352	116,016
Measured at fair value on a recurring basis: | Corporate notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	93,453		31,050	60,614
Measured at fair value on a recurring basis: | Mortgage-backed
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	1,702,378		1,319,725	1,149,448
Measured at fair value on a recurring basis: | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities			36,802	36,352
Measured at fair value on a recurring basis: | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-investment			0
Measured at fair value on a recurring basis: | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading account securities	688		995	643
Equity securities with readily determinable fair value	36,414
Mortgage loans held-for-sale, at fair value	338,111		313,592	370,282
Loans held-for-investment	64,427		0	0
MSRs	0		0	0
Nonqualified deferred compensation assets	12,503		11,065	10,824
Derivative assets	93,661		49,912	46,982
Total financial assets	2,609,888		2,098,270	2,022,308
Derivative liabilities	71,381		35,671	35,773
Measured at fair value on a recurring basis: | Level 2 | U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	124,761		143,822	144,145
Measured at fair value on a recurring basis: | Level 2 | U.S. Government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	107,705		153,136	155,385
Measured at fair value on a recurring basis: | Level 2 | Municipal Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	35,787		38,171	47,633
Measured at fair value on a recurring basis: | Level 2 | Corporate notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	93,453		31,050	60,614
Measured at fair value on a recurring basis: | Level 2 | Mortgage-backed
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	1,702,378		1,319,725	1,149,448
Measured at fair value on a recurring basis: | Level 2 | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities			36,802	36,352
Measured at fair value on a recurring basis: | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading account securities	0		0	0
Equity securities with readily determinable fair value	0
Mortgage loans held-for-sale, at fair value	0		0	0
Loans held-for-investment	13,456		33,717	29,704
MSRs	74,530		33,676	29,414
Nonqualified deferred compensation assets	0		0	0
Derivative assets	2,492		2,157	1,216
Total financial assets	191,379		150,510	132,660
Derivative liabilities	0		0	0
Measured at fair value on a recurring basis: | Level 3 | U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0		0	0
Measured at fair value on a recurring basis: | Level 3 | U.S. Government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	3,315		3,779	3,943
Measured at fair value on a recurring basis: | Level 3 | Municipal Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	97,586		77,181	68,383
Measured at fair value on a recurring basis: | Level 3 | Corporate notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0		0	0
Measured at fair value on a recurring basis: | Level 3 | Mortgage-backed
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 0		0	0
Measured at fair value on a recurring basis: | Level 3 | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities			$ 0	$ 0

XML

Fair Values of Assets and Liabilities (Summary of Changes in Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Loans held-for- investment
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 13,764	$ 30,173	$ 33,717	$ 22,137
Net Income	(32)	177	(1,420)	1,369
Other comprehensive loss	0	0	0	0
Purchases	0	0	0	0
Issuances	0	0	0	0
Sales	0	0	0	0
Settlements	(1,520)	(4,504)	(24,177)	(9,995)
Net transfers into/(out of) Level 3	1,244	3,858	5,336	16,193
Ending Balance	13,456	29,704	13,456	29,704
Mortgage servicing rights
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	63,194	27,307	33,676	19,103
Net Income	11,336	2,107	27,048	10,311
Other comprehensive loss		0		0
Purchases		0	13,806	0
Issuances	0	0	0	0
Settlements		0		0
Net transfers into/(out of) Level 3	0	0	0	0
Ending Balance	74,530	29,414	74,530	29,414
Derivatives
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	3,819	1,047	2,157	2,291
Net Income	(1,327)	169	335	(1,075)
Other comprehensive loss	0	0	0	0
Purchases	0	0	0	0
Issuances	0	0	0	0
Sales	0	0	0	0
Settlements	0	0	0	0
Net transfers into/(out of) Level 3	0	0	0	0
Ending Balance	2,492	1,216	2,492	1,216
Municipal Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	96,566	77,341	77,181	79,626
Net Income		0		0
Other comprehensive loss	(2,573)	(4,113)	(5,658)	(1,084)
Purchases	4,830	0	31,846	10,879
Issuances	0	0	0	0
Sales	0	0	0	0
Settlements	(1,237)	(4,845)	(5,783)	(21,038)
Net transfers into/(out of) Level 3		0		0
Ending Balance	97,586	68,383	97,586	68,383
U.S. Government agencies
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	3,482	4,110	3,779	0
Net Income	0	0	0	0
Other comprehensive loss	(9)	(167)	(306)	(340)
Purchases	0	0	0	0
Issuances	0	0	0	0
Sales	0	0	0	0
Settlements	(158)	0	(158)	0
Net transfers into/(out of) Level 3	0	0	0	4,283
Ending Balance	$ 3,315	$ 3,943	$ 3,315	$ 3,943

XML

Fair Values of Assets and Liabilities (Summary of Assets Measured at Fair Value on a Nonrecurring Basis) (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans—collateral based	$ 132,522	$ 132,522	$ 105,088	$ 78,594
Fair Value Losses Recognized, Impaired loans—collateral based	3,978	11,152
Fair Value Losses Recognized, Other real estate owned	1,504	5,173
Fair Value Losses Recognized, Total	5,482	16,325
Measured at fair value on a non-recurring basis:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans—collateral based	106,219	106,219
Other real estate owned	28,303	28,303
Total financial assets	134,522	134,522
Measured at fair value on a non-recurring basis: | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans—collateral based	0	0
Other real estate owned	0	0
Total financial assets	0	0
Measured at fair value on a non-recurring basis: | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans—collateral based	0	0
Other real estate owned	0	0
Total financial assets	0	0
Measured at fair value on a non-recurring basis: | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans—collateral based	106,219	106,219
Other real estate owned	28,303	28,303
Total financial assets	$ 134,522	$ 134,522

XML

Fair Values of Assets and Liabilities (Schedule of Valuation Techniques and Significant Unobservable Inputs Used to Measure Both Recurring and Non-Recurring) (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($) $ / Loan	Jun. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Available-for-sale securities	$ 2,164,985		$ 1,803,666	$ 1,665,903
Loans held-for-investment	77,883			29,414
MSRs	74,530	$ 63,194	33,676	29,414	$ 27,307	$ 19,103
Derivative assets	96,153		52,069	48,198
Impaired loans—collateral based	132,522		105,088	78,594
Measured at fair value on a recurring basis:
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Loans held-for-investment	77,883		33,717	29,704
MSRs	74,530		33,676	29,414
Derivative assets	96,153		52,069	48,198
Measured at fair value on a non-recurring basis:
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Impaired loans—collateral based	106,219
Other real estate owned	28,303
Level 3 | Measured at fair value on a recurring basis:
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Loans held-for-investment	13,456		33,717	29,704
MSRs	74,530		33,676	29,414
Derivative assets	$ 2,492		$ 2,157	$ 1,216
Level 3 | Measured at fair value on a recurring basis: | Mortgage servicing rights | Weighted Average of Inputs
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cost of servicing (in dollars per loan) | $ / Loan	78
Cost of servicing - delinquent (in dollars per loan) | $ / Loan	274
Level 3 | Measured at fair value on a non-recurring basis:
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Impaired loans—collateral based	$ 106,219
Other real estate owned	$ 28,303
Discounted cash flows | Level 3 | Measured at fair value on a recurring basis: | Loans held-for-investment Discount Rate | Minimum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate	0.04
Discounted cash flows | Level 3 | Measured at fair value on a recurring basis: | Loans held-for-investment Discount Rate | Maximum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate	0.05
Discounted cash flows | Level 3 | Measured at fair value on a recurring basis: | Loans held-for-investment Discount Rate | Weighted Average of Inputs
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate	0.0457
Discounted cash flows | Level 3 | Measured at fair value on a recurring basis: | Loans held-for-investment Credit Spread | Minimum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate	0.00
Discounted cash flows | Level 3 | Measured at fair value on a recurring basis: | Loans held-for-investment Credit Spread | Maximum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate	0.07
Discounted cash flows | Level 3 | Measured at fair value on a recurring basis: | Loans held-for-investment Credit Spread | Weighted Average of Inputs
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate	0.0100
Discounted cash flows | Level 3 | Measured at fair value on a recurring basis: | Mortgage Servicing Rights Discount Rate | Minimum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate	0.07
Discounted cash flows | Level 3 | Measured at fair value on a recurring basis: | Mortgage Servicing Rights Discount Rate | Maximum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate	0.18
Discounted cash flows | Level 3 | Measured at fair value on a recurring basis: | Mortgage Servicing Rights Discount Rate | Weighted Average of Inputs
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate	0.1003
Discounted cash flows | Level 3 | Measured at fair value on a recurring basis: | Mortgage Servicing Rights Prepayment Rate | Weighted Average of Inputs
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate	0.1003
Discounted cash flows | Level 3 | Measured at fair value on a recurring basis: | Mortgage Servicing Rights Cost of servicing | Minimum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cost of servicing (in dollars per loan) | $ / Loan	15
Discounted cash flows | Level 3 | Measured at fair value on a recurring basis: | Mortgage Servicing Rights Cost of servicing | Maximum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cost of servicing (in dollars per loan) | $ / Loan	200
Discounted cash flows | Level 3 | Measured at fair value on a recurring basis: | Mortgage Servicing Rights Cost of servicing | Weighted Average of Inputs
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cost of servicing (in dollars per loan) | $ / Loan	78
Discounted cash flows | Level 3 | Measured at fair value on a recurring basis: | Mortgage Servicing Rights Cost of servicing - delinquent | Minimum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cost of servicing - delinquent (in dollars per loan) | $ / Loan	200
Discounted cash flows | Level 3 | Measured at fair value on a recurring basis: | Mortgage Servicing Rights Cost of servicing - delinquent | Maximum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cost of servicing - delinquent (in dollars per loan) | $ / Loan	1,000
Discounted cash flows | Level 3 | Measured at fair value on a recurring basis: | Mortgage Servicing Rights Cost of servicing - delinquent | Weighted Average of Inputs
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cost of servicing - delinquent (in dollars per loan) | $ / Loan	274
Discounted cash flows | Level 3 | Measured at fair value on a recurring basis: | Derivatives | Minimum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Pull-through rate	20.00%
Discounted cash flows | Level 3 | Measured at fair value on a recurring basis: | Derivatives | Maximum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Pull-through rate	100.00%
Discounted cash flows | Level 3 | Measured at fair value on a recurring basis: | Derivatives | Weighted Average of Inputs
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Pull-through rate	91.12%
Appraisal value | Level 3 | Measured at fair value on a non-recurring basis: | Impaired loans—collateral based
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Other Real Estate Owned, Measurement Input	0.10
Appraisal value | Level 3 | Measured at fair value on a non-recurring basis: | Impaired loans—collateral based | Weighted Average of Inputs
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Other Real Estate Owned, Measurement Input	0.1000
Appraisal value | Level 3 | Measured at fair value on a non-recurring basis: | Other real estate owned
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Other Real Estate Owned, Measurement Input	0.10
Appraisal value | Level 3 | Measured at fair value on a non-recurring basis: | Other real estate owned | Weighted Average of Inputs
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Other Real Estate Owned, Measurement Input	0.1000
Measurement Input, Constant Prepayment Rate | Level 3 | Measured at fair value on a recurring basis: | Loans held-for- investment
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate	0.1031
Measurement Input, Constant Prepayment Rate | Level 3 | Measured at fair value on a recurring basis: | Mortgage servicing rights | Minimum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate	0.00
Measurement Input, Constant Prepayment Rate | Level 3 | Measured at fair value on a recurring basis: | Mortgage servicing rights | Maximum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate	0.81
Measurement Input, Constant Prepayment Rate | Level 3 | Measured at fair value on a recurring basis: | Mortgage servicing rights | Weighted Average of Inputs
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate	0.1003
Measurement Input, Constant Prepayment Rate | Discounted cash flows | Level 3 | Measured at fair value on a recurring basis: | Loans held-for-investment Constant Prepayment Rate
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate	0.1031
Measurement Input, Constant Prepayment Rate | Discounted cash flows | Level 3 | Measured at fair value on a recurring basis: | Loans held-for-investment Constant Prepayment Rate | Weighted Average of Inputs
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate	0.1031
Measurement Input, Constant Prepayment Rate | Discounted cash flows | Level 3 | Measured at fair value on a recurring basis: | Mortgage Servicing Rights Prepayment Rate | Minimum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate	0.00
Measurement Input, Constant Prepayment Rate | Discounted cash flows | Level 3 | Measured at fair value on a recurring basis: | Mortgage Servicing Rights Prepayment Rate | Maximum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate	0.81

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Fair Values of Assets and Liabilities (Summary Of Carrying Amounts And Estimated Fair Values Of Financial Instruments) (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 279,993		$ 277,591	$ 251,952		$ 270,045
Interest bearing deposits with banks	1,137,044		1,063,242	1,218,728
Available-for-sale securities	2,164,985		1,803,666	1,665,903
Held-to-maturity securities	911,597		812,516	807,036
Trading account securities	688		995	643
Equity securities with readily determinable fair value	36,414		0	0
FHLB and FRB stock, at cost	99,998		89,989	87,192
Brokerage customer receivables	15,649		26,431	23,631
Mortgage loans held-for-sale, at fair value	338,111		313,592	370,282
MSRs	74,530	$ 63,194	33,676	29,414	$ 27,307	19,103
Accrued interest receivable and other	700,568		567,374	580,612
FHLB advances	615,000		559,663	468,962
Other borrowings	373,571		266,123	251,680
Subordinated notes	139,172		139,088	139,052
Junior subordinated debentures	253,566		253,566	253,566
Derivative liabilities	71,381		35,671	35,773
FDIC indemnification liability				15,472	$ 15,375	$ 16,701
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	279,993		277,591	251,952
Interest bearing deposits with banks	1,137,044		1,063,242	1,218,728
Available-for-sale securities	2,164,985		1,803,666	1,665,903
Held-to-maturity securities	966,438		826,449	819,340
Trading account securities	688		995	643
Equity securities with readily determinable fair value	36,414		0	0
FHLB and FRB stock, at cost	99,998		89,989	87,192
Brokerage customer receivables	15,649		26,431	23,631
Mortgage loans held-for-sale, at fair value	338,111		313,592	370,282
Loans held-for-investment, at fair value	77,883		33,717	29,704
Loans held-for-investment, at amortized cost	23,046,068		21,607,080	20,929,678
MSRs	74,530		33,676	29,414
Nonqualified deferred compensation assets	12,503		11,065	10,824
Derivative assets	96,153		52,069	48,198
Accrued interest receivable and other	254,879		227,649	225,435
Total financial assets	28,601,336		26,367,211	25,710,924
Non-maturity deposits	19,456,677		18,775,977	18,228,388
Deposits with stated maturities	5,460,038		4,407,370	4,666,675
FHLB advances	615,000		559,663	468,962
Other borrowings	373,571		266,123	251,680
Subordinated notes	139,172		139,088	139,052
Junior subordinated debentures	253,566		253,566	253,566
Derivative liabilities	71,381		35,671	35,773
FDIC indemnification liability	0		0	15,472
Accrued interest payable	15,374		8,030	9,177
Total financial liabilities	26,384,779		24,445,488	24,068,745
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	279,993		277,591	251,952
Interest bearing deposits with banks	1,137,044		1,063,242	1,218,728
Available-for-sale securities	2,164,985		1,803,666	1,665,903
Held-to-maturity securities	911,597		812,516	807,036
Trading account securities	688		995	643
Equity securities with readily determinable fair value	36,414		0	0
FHLB and FRB stock, at cost	99,998		89,989	87,192
Brokerage customer receivables	15,649		26,431	23,631
Mortgage loans held-for-sale, at fair value	338,111		313,592	370,282
Loans held-for-investment, at fair value	77,883		33,717	29,704
Loans held-for-investment, at amortized cost	23,261,545		21,768,978	21,064,801
MSRs	74,530		33,676	29,414
Nonqualified deferred compensation assets	12,503		11,065	10,824
Derivative assets	96,153		52,069	48,198
Accrued interest receivable and other	254,879		227,649	225,435
Total financial assets	28,761,972		26,515,176	25,833,743
Non-maturity deposits	19,456,677		18,775,977	18,228,388
Deposits with stated maturities	5,475,048		4,350,004	4,608,760
FHLB advances	615,342		544,750	454,753
Other borrowings	373,571		266,123	251,680
Subordinated notes	146,838		144,266	145,376
Junior subordinated debentures	258,488		264,696	240,305
Derivative liabilities	71,381		35,671	35,773
FDIC indemnification liability	0		0	15,472
Accrued interest payable	15,374		8,030	9,177
Total financial liabilities	$ 26,412,719		$ 24,389,517	$ 23,989,684

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Stock-Based Compensation Plans (Narrative) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	May 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future grants (in shares)	3,400,000		3,400,000
Number of stock options granted			0	0
Stock-based compensation expense	$ 3.2	$ 2.4	$ 10.3	$ 8.2
Aggregate intrinsic value of options exercised			12.9	16.3
Cash received from option exercises			$ 11.2	$ 20.3
2015 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares approved for issuance (in shares)					5,485,000
2007 Plan and 2015 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based payment award options term			7 years
2007 Plan and 2015 Plan | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			3 years
2007 Plan and 2015 Plan | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			5 years
Restricted Stock | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			1 year
Restricted Stock | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			5 years
LTIP Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			3 years
LTIP Awards | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of performance based award payouts			0.00%
Granted after 2014 | LTIP Awards | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of performance based award payouts			150.00%
Granted prior to 2015 | LTIP Awards | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of performance based award payouts			200.00%

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Stock-Based Compensation Plans (Summary Of Stock Option Activity) (Detail) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Common Shares
Common Shares, Outstanding at beginning of the period (in shares)	1,084,756	1,698,912
Common Shares, Granted (in shares)	0	0
Common Shares, Exercised (in shares)	(271,674)	(499,222)
Common Shares, Forfeited or canceled (in shares)	(6,942)	(16,378)
Common Shares, Outstanding at end of the period (in shares)	806,140	1,183,312
Stock Options, Exercisable (in shares)	609,752	640,759
Weighted Average Strike Price
Weighted Average Strike Price, Outstanding at beginning of period (usd per share)	$ 41.98	$ 41.50
Weighted Average Strike Price, Granted (usd per share)	0.00	0.00
Weighted Average Strike Price, Exercised (usd per share)	41.36	40.57
Weighted Average Strike Price, Forfeited or canceled (usd per share)	39.81	43.07
Weighted Average Strike Price, Outstanding at end of period (usd per share)	42.20	41.87
Stock Options, Weighted Average Strike Price, Exercisable (usd per share)	$ 42.42	$ 41.58
Stock Options, Remaining Contractual Term, Outstanding, Years	3 years 3 months 18 days	4 years 2 months 12 days
Stock Options, Remaining Contractual Term, Exercisable, Years	3 years	3 years 6 months
Stock Options, Intrinsic Value, Outstanding	$ 34,452	$ 43,122
Stock Options, Intrinsic Value, Exercisable	$ 25,924	$ 23,532

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Stock-Based Compensation Plans (Summary Of Plans' Restricted Share And Performance-Vested Stock Award Activity) (Detail) - $ / shares	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Restricted Stock
Common Shares
Outstanding Beginning of the Period (in shares)	127,787	133,425
Granted (in shares)	28,506	14,249
Vested and issued (in shares)	(10,438)	(10,695)
Forfeited or canceled (in shares)	(982)	(2,551)
Outstanding End of the Period (in shares)	144,873	134,428
Vested, but not issuable (in shares)	90,294	89,563
Weighted Average Grant-Date Fair Value
Beginning Weighted Average Grant-Date Fair Value (usd per share)	$ 53.33	$ 49.94
Weighted Average Grant-Date Fair Value, Granted (usd per share)	87.65	72.53
Weighted Average Grant-Date Fair Value, Vested and issued (usd per share)	56.88	46.03
Weighted Average Grant-Date Fair Value, Forfeited or canceled (usd per share)	55.39	52.26
Ending Weighted Average Grant-Date Fair Value (usd per share)	59.82	52.60
Weighted Average Grant-Date Fair Value, Vested, but not issuable (usd per share)	$ 51.88	$ 51.59
Performance Shares
Common Shares
Outstanding Beginning of the Period (in shares)	359,196	298,180
Granted (in shares)	134,326	145,829
Vested and issued (in shares)	(82,307)	(68,712)
Forfeited or canceled (in shares)	(13,582)	(14,164)
Outstanding End of the Period (in shares)	397,633	361,133
Vested, but not issuable (in shares)	21,477	13,616
Weighted Average Grant-Date Fair Value
Beginning Weighted Average Grant-Date Fair Value (usd per share)	$ 54.37	$ 43.64
Weighted Average Grant-Date Fair Value, Granted (usd per share)	88.28	72.60
Weighted Average Grant-Date Fair Value, Vested and issued (usd per share)	44.39	46.85
Weighted Average Grant-Date Fair Value, Forfeited or canceled (usd per share)	59.18	52.81
Ending Weighted Average Grant-Date Fair Value (usd per share)	67.72	54.36
Weighted Average Grant-Date Fair Value, Vested, but not issuable (usd per share)	$ 43.52	$ 42.66

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Shareholders' Equity And Earnings Per Share (Components Of Other Comprehensive Income (Loss)) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Jan. 01, 2018
Activity Accumulated Other Comprehensive Income [Roll Forward]
Balance at the beginning			$ 2,976,939	$ 2,695,617
Other comprehensive (loss) income during the period, net of tax, before reclassifications	$ (9,484)	$ 5,087	(43,248)	24,124
Amount reclassified from accumulated other comprehensive loss into net income, net of tax	(2,426)	(16)	(3,177)	618
Amount reclassified from accumulated other comprehensive loss related to amortization of unrealized losses on investment securities transferred to held-to-maturity from available-for-sale, net of tax	(24)	(20)	(36)	(900)
Total other comprehensive (loss) income	(11,934)	5,051	(46,461)	23,842
Balance at the end	3,179,822	2,908,925	3,179,822	2,908,925
Accumulated Unrealized Losses on Securities
Activity Accumulated Other Comprehensive Income [Roll Forward]
Balance at the beginning	(54,885)	(15,022)	(15,813)	(29,309)
Other comprehensive (loss) income during the period, net of tax, before reclassifications	(13,277)	653	(46,665)	15,815
Amount reclassified from accumulated other comprehensive loss into net income, net of tax	(730)	(24)	(5)	(19)
Amount reclassified from accumulated other comprehensive loss related to amortization of unrealized losses on investment securities transferred to held-to-maturity from available-for-sale, net of tax	(24)	(20)	(36)	(900)
Total other comprehensive (loss) income	(14,031)	609	(46,706)	14,896
Balance at the end	(68,916)	(14,413)	(68,916)	(14,413)
Accumulated Unrealized Gains on Derivative Instruments
Activity Accumulated Other Comprehensive Income [Roll Forward]
Balance at the beginning	11,748	4,959	7,164	4,165
Other comprehensive (loss) income during the period, net of tax, before reclassifications	1,851	228	6,368	393
Amount reclassified from accumulated other comprehensive loss into net income, net of tax	(1,696)	8	(3,172)	637
Amount reclassified from accumulated other comprehensive loss related to amortization of unrealized losses on investment securities transferred to held-to-maturity from available-for-sale, net of tax	0	0	0	0
Total other comprehensive (loss) income	155	236	3,196	1,030
Balance at the end	11,903	5,195	11,903	5,195
Accumulated Foreign Currency Translation Adjustments
Activity Accumulated Other Comprehensive Income [Roll Forward]
Balance at the beginning	(38,079)	(36,474)	(33,186)	(40,184)
Other comprehensive (loss) income during the period, net of tax, before reclassifications	1,942	4,206	(2,951)	7,916
Amount reclassified from accumulated other comprehensive loss into net income, net of tax	0	0	0	0
Amount reclassified from accumulated other comprehensive loss related to amortization of unrealized losses on investment securities transferred to held-to-maturity from available-for-sale, net of tax	0	0	0	0
Total other comprehensive (loss) income	1,942	4,206	(2,951)	7,916
Balance at the end	(36,137)	(32,268)	(36,137)	(32,268)
Accumulated other comprehensive loss
Activity Accumulated Other Comprehensive Income [Roll Forward]
Balance at the beginning	(81,216)	(46,537)	(41,835)	(65,328)
Total other comprehensive (loss) income			(46,461)	23,842
Balance at the end	$ (93,150)	$ (41,486)	$ (93,150)	$ (41,486)
ASU 2016-01
Activity Accumulated Other Comprehensive Income [Roll Forward]
Cumulative effect adjustment					$ (1,880)
ASU 2016-01 | Accumulated Unrealized Losses on Securities
Activity Accumulated Other Comprehensive Income [Roll Forward]
Cumulative effect adjustment					(1,880)
ASU 2016-01 | Accumulated Unrealized Gains on Derivative Instruments
Activity Accumulated Other Comprehensive Income [Roll Forward]
Cumulative effect adjustment					0
ASU 2016-01 | Accumulated Foreign Currency Translation Adjustments
Activity Accumulated Other Comprehensive Income [Roll Forward]
Cumulative effect adjustment					0
ASU 2016-01 | Accumulated other comprehensive loss
Activity Accumulated Other Comprehensive Income [Roll Forward]
Cumulative effect adjustment					(1,880)
ASU 2018-02
Activity Accumulated Other Comprehensive Income [Roll Forward]
Cumulative effect adjustment					(2,974)
ASU 2018-02 | Accumulated Unrealized Losses on Securities
Activity Accumulated Other Comprehensive Income [Roll Forward]
Cumulative effect adjustment					(4,517)
ASU 2018-02 | Accumulated Unrealized Gains on Derivative Instruments
Activity Accumulated Other Comprehensive Income [Roll Forward]
Cumulative effect adjustment					1,543
ASU 2018-02 | Accumulated Foreign Currency Translation Adjustments
Activity Accumulated Other Comprehensive Income [Roll Forward]
Cumulative effect adjustment					0
ASU 2018-02 | Accumulated other comprehensive loss
Activity Accumulated Other Comprehensive Income [Roll Forward]
Cumulative effect adjustment					$ (2,974)

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Shareholders' Equity And Earnings Per Share (Other Comprehensive Income Reclassified from AOCI) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Gains (losses) on investment securities, net	$ 90	$ 39	$ (249)	$ 31
Income before taxes	122,814	104,248	352,471	294,212
Income tax expense	(30,866)	(38,622)	(88,962)	(105,311)
Interest on deposits	48,736	23,655	110,578	58,396
Interest on junior subordinated debentures	2,940	2,640	8,239	7,481
Net income	91,948	65,626	263,509	188,901
Reclassification Out of Accumulated Other Comprehensive Income | Accumulated Unrealized Losses on Securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Gains (losses) on investment securities, net	1,001	39	6	31
Income before taxes	1,001	39	6	31
Income tax expense	(271)	(15)	(1)	(12)
Net income	730	24	5	19
Reclassification Out of Accumulated Other Comprehensive Income | Accumulated Unrealized Gains on Derivative Instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Income before taxes	2,319	(14)	4,338	(1,051)
Income tax expense	(623)	6	(1,166)	414
Interest on deposits	(2,319)	(380)	(4,338)	(15)
Interest on junior subordinated debentures	0	394	0	1,066
Net income	$ 1,696	$ (8)	$ 3,172	$ (637)

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Shareholders' Equity And Earnings Per Share (Computation Of Basic And Diluted Earnings Per Common Share) (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract]
Net income	$ 91,948	$ 65,626	$ 263,509	$ 188,901
Less: Preferred stock dividends	2,050	2,050	6,150	7,728
Net income applicable to common shares	89,898	63,576	257,359	181,173
Add: Dividends on convertible preferred stock, if dilutive	0	0	0	1,578
Net income applicable to common shares—Diluted	$ 89,898	$ 63,576	$ 257,359	$ 182,751
Weighted average common shares outstanding (in shares)	56,366	55,796	56,268	54,292
Effect of dilutive potential common shares
Common stock equivalents (in shares)	918	966	912	988
Convertible preferred stock, if dilutive (in shares)	0	0	0	1,317
Total dilutive potential common shares (in shares)	918	966	912	2,305
Weighted average common shares and effect of dilutive potential common shares (in shares)	57,284	56,762	57,180	56,597
Net income per common share:
Basic (usd per share)	$ 1.59	$ 1.14	$ 4.57	$ 3.34
Diluted (usd per share)	$ 1.57	$ 1.12	$ 4.50	$ 3.23

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Shareholders' Equity And Earnings Per Share (Narrative) (Detail) - USD ($) $ / shares in Units, $ in Thousands				1 Months Ended					3 Months Ended		9 Months Ended
	Apr. 27, 2017	Apr. 25, 2017	Dec. 19, 2008	Jul. 31, 2018	Apr. 30, 2018	Jan. 31, 2018	Jun. 30, 2015	Mar. 31, 2012	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Temporary Equity [Line Items]
Cash dividends declared per common share (usd per share)				$ 0.19	$ 0.19	$ 0.19			$ 0.19	$ 0.14	$ 0.57	$ 0.42
Common stock dividends per share declared annualized (usd per share)				$ 0.76	$ 0.76	$ 0.76
US Treasury
Temporary Equity [Line Items]
Warrants outstanding, shares			1,643,295						7,410		7,410
Warrant termination period			10 years
Investment warrants, exercise price (usd per share)											$ 22.57
Warrants exercised, shares											15,951
Common stock shares issued from exercise of warrants											11,764
Common stock
Temporary Equity [Line Items]
Common stock issued, conversion of preferred stock, shares	3,069,828	51,244
Series D Preferred Stock
Temporary Equity [Line Items]
Preferred stock, shares issued (in shares)							5,000,000		5,000,000	5,000,000	5,000,000	5,000,000	5,000,000
Preferred stock, liquidation value per share (usd per share)							$ 25		$ 25	$ 25	$ 25	$ 25	$ 25
Preferred stock, value							$ 125,000		$ 125,000	$ 125,000	$ 125,000	$ 125,000	$ 125,000
Preferred stock, dividend rate, percentage							6.50%
Series C Preferred Stock
Temporary Equity [Line Items]
Preferred stock, shares issued (in shares)								126,500
Preferred stock, liquidation value per share (usd per share)								$ 1,000
Preferred stock, value								$ 126,500
Preferred stock, dividend rate, percentage								5.00%
Number of shares converted	124,184	2,073
Convertible preferred stock, rate of conversion, shares	24.72
London Interbank Offered Rate (LIBOR) | Series D Preferred Stock
Temporary Equity [Line Items]
Preferred stock, dividend rate, percentage, variable spread							4.06%