10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

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

For the quarterly period ended September 30, 2016

OR

o 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 001-36599

MB FINANCIAL, INC.

(Exact name of registrant as specified in its charter)

Maryland	36-4460265
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
800 West Madison Street, Chicago, Illinois	60607
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code:  (888) 422-6562

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 for 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 xNoo

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).  YesxNoo

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

Large accelerated filerx	Accelerated filero
Non-accelerated filero (Do not check if a smaller reporting company)	Smaller reporting companyo

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).  YesoNox

There were issued and outstanding 83,577,088 shares of the Registrant’s common stock as of November 9, 2016.

MB FINANCIAL, INC.

FORM 10-Q

September 30, 2016

INDEX

		Page
PART I.	FINANCIAL INFORMATION
Item 1.	Financial Statements	1
	Consolidated Balance Sheets	1
	Consolidated Statements of Operations	2
	Consolidated Statements of Comprehensive Income	4
	Consolidated Statements of Changes in Stockholders’ Equity	5
	Consolidated Statements of Cash Flows	6
	Notes to Consolidated Financial Statements	8
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	52
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	75
Item 4.	Controls and Procedures	77
PART II.	OTHER INFORMATION
Item 1.	Legal Proceedings	78
Item 1A.	Risk Factors	78
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	78
Item 6.	Exhibits	78
	Signatures	79

i

PART I.        FINANCIAL INFORMATION

Item 1.   Financial Statements

MB FINANCIAL, INC. & SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

(Amounts in thousands, except share and per share data)

	(Unaudited)
	September 30, 2016			December 31, 2015
ASSETS
Cash and due from banks	$	351,009		$	307,869
Interest earning deposits with banks	125,250			73,572
Total cash and cash equivalents	476,259			381,441
Investment securities:
Securities available for sale, at fair value	1,859,356			1,585,023
Securities held to maturity, at amortized cost ($1,175,838 fair value at September 30, 2016 and $1,274,767 at December 31, 2015)	1,115,262			1,230,810
Non-marketable securities - FHLB and FRB stock	146,209			114,233
Total investment securities	3,120,827			2,930,066
Loans held for sale	899,412			744,727
Loans:
Total loans, excluding purchased credit impaired loans	12,379,358			9,652,592
Purchased credit impaired loans	161,338			141,406
Total loans	12,540,696			9,793,998
Less: Allowance for loan and lease losses	139,528			128,140
Net loans	12,401,168			9,665,858
Lease investments, net	277,647			211,687
Premises and equipment, net	283,112			236,013
Cash surrender value of life insurance	199,628			136,953
Goodwill	993,799			725,070
Other intangibles	65,395			44,812
Mortgage servicing rights, at fair value	154,730			168,162
Other real estate owned, net	33,105			31,553
Other real estate owned related to FDIC-assisted transactions	5,177			10,717
Other assets	431,623			297,948
Total assets	$	19,341,882		$	15,585,007
LIABILITIES AND STOCKHOLDERS’ EQUITY
LIABILITIES
Deposits:
Non-interest bearing	$	6,410,334		$	4,627,184
Interest bearing	7,868,932			6,878,031
Total deposits	14,279,266			11,505,215
Short-term borrowings	1,496,319			1,005,737
Long-term borrowings	311,645			400,274
Junior subordinated notes issued to capital trusts	209,159			186,164
Accrued expenses and other liabilities	482,085			400,333
Total liabilities	16,778,474			13,497,723
STOCKHOLDERS’ EQUITY
Preferred stock, ($0.01 par value, authorized 10,000,000 shares at September 30, 2016 and December 31, 2015; Series A, 8% perpetual non-cumulative, 4,000,000 shares issued and outstanding at September 30, 2016 and December 31, 2015, $25 liquidation value; Series B, 8% cumulative voting convertible, 525 shares issued and outstanding at September 30, 2016 and none issued and outstanding at December 31, 2015)	116,507			115,280
Common stock, ($0.01 par value; authorized 120,000,000 shares at September 30, 2016 and 100,000,000 shares at December 31, 2015; issued 85,547,217 shares at September 30, 2016 and 75,566,885 shares at December 31, 2015)	855			756
Additional paid-in capital	1,674,341			1,280,870
Retained earnings	809,769			731,812
Accumulated other comprehensive income	23,763			15,777
Less: 1,991,960 and 1,888,556 shares of treasury common stock, at cost, at September 30, 2016 and December 31, 2015, respectively	(62,084		)	(58,504		)
Controlling interest stockholders’ equity	2,563,151			2,085,991
Non-controlling interest	257			1,293
Total stockholders’ equity	2,563,408			2,087,284
Total liabilities and stockholders’ equity	$	19,341,882		$	15,585,007

     See Accompanying Notes to Consolidated Financial Statements.

1

MB FINANCIAL, INC. & SUBSIDIARIES

CONSOLIDATED STATEMENTS OF OPERATIONS

(Amounts in thousands, except share and per share data)(Unaudited)

	Three Months Ended					Nine Months Ended
	September 30,					September 30,
	2016			2015		2016			2015
Interest income:
Loans:
Taxable	$	118,675		$	100,573	$	333,829		$	298,187
Nontaxable	2,846			2,283		8,173			6,716
Investment securities:
Taxable	8,844			9,655		26,209			29,591
Nontaxable	10,382			10,752		31,802			30,005
Other interest earning accounts	164			89		430			208
Total interest income	140,911			123,352		400,443			364,707
Interest expense:
Deposits	6,681			5,102		18,255			14,301
Short-term borrowings	1,092			395		2,723			1,027
Long-term borrowings and junior subordinated notes	2,367			1,886		6,788			5,542
Total interest expense	10,140			7,383		27,766			20,870
Net interest income	130,771			115,969		372,677			343,837
Provision for credit losses	6,549			5,358		16,941			14,628
Net interest income after provision for credit losses	124,222			110,611		355,736			329,209
Non-interest income:
Mortgage banking revenue	49,095			30,692		116,192			90,884
Lease financing revenue, net	18,864			20,000		53,618			60,644
Commercial deposit and treasury management fees	12,957			11,472		36,383			33,572
Trust and asset management fees	8,244			6,002		24,430			17,468
Card fees	4,161			3,335		11,731			11,671
Capital markets and international banking fees	3,313			2,357		9,311			5,793
Consumer and other deposit service fees	3,559			3,499		9,745			9,842
Brokerage fees	1,294			1,281		3,767			4,502
Loan service fees	1,792			1,531		5,505			4,369
Increase in cash surrender value of life insurance	1,055			852		2,759			2,527
Net gain (loss) on investment securities	—			371		269			(173		)
Net gain (loss) on sale of assets	5			1		(45		)	(2		)
Other operating income	4,048			858		8,415			5,371
Total non-interest income	108,387			82,251		282,080			246,468
Non-interest expenses:
Salaries and employee benefits	111,478			87,891		292,073			258,822
Occupancy and equipment	14,766			12,458		41,441			37,575
Computer services and telecommunication	12,836			8,567		31,668			26,008
Advertising and marketing	3,084			2,578		8,926			7,521
Professional and legal	4,460			1,801		10,370			6,884
Other intangibles amortization	1,674			1,542		4,917			4,569
Branch exit and facilities impairment charges	(2,908		)	70		(2,709		)	7,899
Net (gain) loss recognized on other real estate owned and other related expenses	(721		)	577		(809		)	2,197
Prepayment fees on interest bearing liabilities	—			—		—			85
Other operating expenses	25,716			18,782		68,214			55,363
Total non-interest expenses	170,385			134,266		454,091			406,923
Income before income taxes	62,224			58,596		183,725			168,754
Income tax expense	17,805			18,318		56,780			53,413
Net income	44,419			40,278		126,945			115,341
Dividends on preferred shares	2,004			2,000		6,004			6,000
Net income available to common stockholders	$	42,415		$	38,278	$	120,941		$	109,341

2

MB FINANCIAL, INC. & SUBSIDIARIES

CONSOLIDATED STATEMENTS OF OPERATIONS - (Continued)

(Amounts in thousands, except share and per share data)(Unaudited)

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2016		2015		2016		2015
Common share data:
Basic earnings per common share	$	0.55	$	0.52	$	1.62	$	1.47
Diluted earnings per common share	0.54		0.51		1.60		1.45
Weighted average common shares outstanding for basic earnings per common share	77,506,885		74,297,281		74,780,943		74,478,164
Diluted weighted average common shares outstanding for diluted earnings per common share	78,683,170		75,029,827		75,727,580		75,154,585

See Accompanying Notes to Consolidated Financial Statements.

3

MB FINANCIAL, INC. & SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Amounts in thousands) (Unaudited)

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2016			2015			2016			2015
Net income	$	44,419		$	40,278		$	126,945		$	115,341
Unrealized holding (losses) gains on investment securities, net of reclassification adjustments	(7,679		)	4,989			15,603			3,507
Reclassification adjustment for amortization of unrealized gains on investment securities transferred to held to maturity from available for sale	(554		)	(1,010		)	(2,081		)	(2,669		)
Reclassification adjustments for (gains) losses included in net income	—			(371		)	(269		)	173
Other comprehensive (loss) income, before tax	(8,233		)	3,608			13,253			1,011
Income tax benefit (expense) related to items of other comprehensive (loss) income	3,265			(1,418		)	(5,267		)	(399		)
Other comprehensive (loss) income, net of tax	(4,968		)	2,190			7,986			612
Comprehensive income	$	39,451		$	42,468		$	134,931		$	115,953

See Accompanying Notes to Consolidated Financial Statements.

4

MB FINANCIAL, INC. & SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY

Nine Months EndedSeptember 30, 2016 and 2015

(Amounts in thousands, except per share data) (Unaudited)

	Preferred Stock		Common Stock		Additional Paid-in Capital			Retained Earnings			Accumulated Other Comprehensive Income, Net of Tax		Treasury Stock			Noncontrolling Interest			Total Stock- holders’ Equity
Balance at December 31, 2014	$	115,280	$	751	$	1,267,761		$	629,677		$	20,356	$	(6,974	)	$	1,435		$	2,028,286
Net income	—		—		—			115,341			—		—			211			115,552
Other comprehensive income, net of tax	—		—		—			—			612		—			—			612
Issuance of common stock	—		—		218			—			—		—			—			218
Cash dividends declared on preferred shares	—		—		—			(6,000		)	—		—			—			(6,000		)
Cash dividends declared on common shares ($0.48 per share)	—		—		—			(36,229		)	—		—			—			(36,229		)
Restricted common stock activity, net of tax	—		5		(1,841		)	—			—		2,876			—			1,040
Stock option activity, net of tax	—		—		(133		)	—			—		—			—			(133		)
Repurchase of common shares	—		—		—			—			—		(47,215		)	—			(47,215		)
Repurchase of common shares in connection with employee benefit plans and held in trust for deferred compensation plan	—		—		360			—			—		(3,945		)	—			(3,585		)
Stock-based compensation expense	—		—		10,983			—			—		—			—			10,983
Distributions to non-controlling interest	—		—		—			—			—		—			(301		)	(301		)
Balance at September 30, 2015	$	115,280	$	756	$	1,277,348		$	702,789		$	20,968	$	(55,258	)	$	1,345		$	2,063,228
Balance at December 31, 2015	$	115,280	$	756	$	1,280,870		$	731,812		$	15,777	$	(58,504	)	$	1,293		$	2,087,284
Net income	—		—		—			126,945			—		—			139			127,084
Other comprehensive income, net of tax	—		—		—			—			7,986		—			—			7,986
Issuance of preferred and common stock due to business combination	1,227		97		383,775			—			—		—			—			385,099
Cash dividends declared on preferred shares	—		—		—			(6,004		)	—		—			—			(6,004		)
Cash dividends declared on common shares ($0.55 per share)	—		—		—			(42,984		)	—		—			—			(42,984		)
Restricted common stock activity, net of tax	—		1		(2,263		)	—			—		750			—			(1,512		)
Stock option activity, net of tax	—		1		272			—			—		(157		)	—			116
Repurchase of common shares in connection with employee benefit plans and held in trust for deferred compensation plan	—		—		381			—			—		(4,173		)	—			(3,792		)
Stock-based compensation expense	—		—		12,573			—			—		—			—			12,573
Purchase of additional investment in subsidiary from minority owners	—		—		(1,267		)	—			—		—			(1,069		)	(2,336		)
Distributions to non-controlling interest	—		—		—			—			—		—			(106		)	(106		)
Balance at September 30, 2016	$	116,507	$	855	$	1,674,341		$	809,769		$	23,763	$	(62,084	)	$	257		$	2,563,408

See Accompanying Notes to Consolidated Financial Statements.

5

MB FINANCIAL, INC. & SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

(Amounts in Thousands) (Unaudited)

	Nine Months Ended
	September 30,
	2016			2015
Cash Flows From Operating Activities
Net income	$	126,945		$	115,341
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of premises and equipment and leased equipment	55,259			45,550
Branch exit and facilities impairment charges	(2,709		)	7,899
Compensation expense for share-based payment plans	12,573			10,983
Net (gain) loss on sales of premises and equipment and leased equipment	(255		)	1,800
Amortization of other intangibles	4,917			4,569
Provision for credit losses	16,941			14,628
Deferred income tax expense	26,208			13,521
Amortization of premiums and discounts on investment securities, net	34,968			35,441
Accretion of discounts on loans, net	(25,426		)	(26,365		)
Accretion of FDIC indemnification asset	—			(72		)
Net (gain) loss on investment securities	(269		)	173
Proceeds from sale of loans held for sale	4,601,291			5,500,778
Origination of loans held for sale	(4,694,890		)	(5,450,842		)
Net gain on sale of loans held for sale	(41,518		)	(25,449		)
Change in fair value of mortgage servicing rights	59,894			40,568
Net (gain) loss on other real estate owned	(1,823		)	2,070
Net loss (gain) on other real estate owned related to FDIC-assisted transactions	448			(296		)
Increase in cash surrender value of life insurance	(2,759		)	(2,527		)
Increase in other assets, net	(162,260		)	(120,160		)
Increase (decrease) in other liabilities, net	22,618			(8,576		)
Net cash provided by operating activities	30,153			159,034
Cash Flows From Investing Activities
Proceeds from sales of investment securities available for sale	19,023			28,356
Proceeds from maturities and calls of investment securities available for sale	212,283			206,378
Purchases of investment securities available for sale	(19,905		)	(148,374		)
Proceeds from maturities and calls of investment securities held to maturity	115,040			61,521
Purchases of investment securities held to maturity	(12,690		)	(295,857		)
Purchases of non-marketable securities - FHLB and FRB stock	(15,999		)	(35,831		)
Redemption of non-marketable securities - FHLB and FRB stock	23			20,000
Net increase in loans	(780,864		)	(248,219		)
Purchases of mortgage servicing rights	(3,423		)	(785		)
Proceeds from sale of mortgage servicing rights	—			103,105
Purchases of premises and equipment and leased equipment	(125,372		)	(64,149		)
Proceeds from sales of premises and equipment and leased equipment	5,194			3,993
Capital improvements on other real estate owned	(96		)	—
Proceeds from sale of other real estate owned	8,081			3,153
Proceeds from sale of other real estate owned related to FDIC-assisted transactions	7,105			9,674
Net cash paid in business acquisition	(9,010		)	—
Purchase of additional investment in subsidiary from minority owners	(2,336		)	—
Net proceeds from FDIC related covered assets	(3,182		)	(6,831		)
Net cash used in investing activities	(606,128		)	(363,866		)
Cash Flows From Financing Activities
Net increase in deposits	384,628			263,636
Net increase in short-term borrowings	442,277			9,114
Proceeds from long-term borrowings	182,247			27,159
Principal paid on long-term borrowings	(286,877		)	(14,900		)
Treasury stock transactions, net	(3,792		)	(50,800		)
Stock options exercised	1,062			499
Excess tax expense from share-based payment arrangements	—			241
Dividends paid on preferred stock	(6,004		)	(6,000		)
Dividends paid on common stock	(42,748		)	(35,953		)
Net cash provided by financing activities	670,793			192,996
Net increase (decrease) in cash and cash equivalents	$	94,818		$	(11,836	)
Cash and cash equivalents:
Beginning of period	381,441			312,081
End of period	$	476,259		$	300,245

6

MB FINANCIAL, INC. & SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS - (Continued)

(Amounts in Thousands) (Unaudited)

	Nine Months Ended
	September 30,
	2016			2015
Supplemental Disclosures of Cash Flow Information:
Cash payments for:
Interest paid to depositors and on other borrowed funds	$	26,952		$	21,656
Income tax payments, net	4,576			(4,958		)
Supplemental Schedule of Noncash Investing Activities:
Investment securities available for sale sold not settled	$	(9,741	)	$	—
Investment securities held to maturity purchased not settled	440			11,656
Loans held for sale transferred to loans held for investment	—			44,078
Loans transferred to other real estate owned	3,566			15,612
Loans transferred to other real estate owned related to FDIC-assisted transactions	1,145			3,221
Loans transferred to repossessed assets	2,796			777
Operating leases rewritten as direct finance leases included as loans	642			6,940
Supplemental Schedule of Noncash Investing Activities From Acquisitions:
Noncash assets acquired:
Investment securities available for sale	$	505,564		$	—
Non-marketable securities - FHLB and FRB stock	16,000			—
Loans	1,952,826			—
Premises and equipment	39,061			—
Cash surrender value of life insurance	59,917			—
Goodwill	268,729			—
Core deposit intangible	25,500			—
Other real estate owned	4,148			—
Other assets	27,615			—
Total noncash assets acquired	$	2,899,360		$	—
Liabilities assumed:
Deposits	$	2,389,423		$	—
Short-term borrowings	48,305			—
Long-term borrowings	16,000			—
Junior subordinated notes issued to capital trusts	28,075			—
Other liabilities	23,477			—
Total liabilities assumed	$	2,505,280		$	—

See Accompanying Notes to Consolidated Financial Statements.

7

MB FINANCIAL, INC. & SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Note 1.    Basis of Presentation

 These unaudited consolidated financial statements include the accounts of MB Financial, Inc., a Maryland corporation (the “Company”), and its subsidiaries, including its wholly owned national bank subsidiary, MB Financial Bank, N.A. (“MB Financial Bank”), based in Chicago, Illinois. In the opinion of management, all normal recurring adjustments necessary for a fair presentation of the financial condition, results of operations and cash flows for the interim periods have been made. The results of operations for the nine months endedSeptember 30, 2016 are not necessarily indicative of the results to be expected for the entire fiscal year.

These unaudited interim financial statements have been prepared in conformity with U.S. generally accepted accounting principles (“GAAP”) and industry practice. Certain information in footnote disclosure normally included in financial statements prepared in accordance with U.S. GAAP and industry practice has been condensed or omitted pursuant to rules and regulations of the Securities and Exchange Commission. These financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015.

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions which affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements, as well as the reported amounts of income and expenses during the reported periods. Actual results could differ from those estimates.

Certain prior period amounts have been reclassified to conform to current period presentation. These reclassifications did not result in any changes to previously reported net income or stockholders’ equity.

Note 2. New Authoritative Accounting Guidance

ASC Topic 810 "Consolidation." New authoritative accounting guidance under ASC Topic 810, "Consolidation" amended prior guidance over the consolidation of certain legal entities. The new authoritative guidance modifies the evaluation of whether limited partnerships and similar legal entities are variable interest entities or voting interest entities, eliminates the presumption that a general partner should consolidate a limited partnership, affects the consolidation analysis of reporting entities that are involved with variable interest entities and provides a scope exception from consolidation guidance for reporting entities with interests in legal entities that are required to comply with or operate in accordance with requirements similar to those for registered money market funds. The Company adopted this new authoritative guidance on January 1, 2016, and it did not have an impact on the Company's statements of operations or financial condition.

ASC Topic 835 "Interest." New authoritative accounting guidance under ASC Topic 835, "Interest" amended prior guidance to simplify the presentation of debt issuance costs. The new authoritative guidance requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The Company adopted this new authoritative guidance on January 1, 2016, and it did not have an impact on the Company's statements of operations or financial condition.

ASC Topic 805 "Business Combinations." New authoritative accounting guidance under ASC Topic 805, "Business Combinations" amended prior guidance to require that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. The new guidance requires that the acquirer record, in the same period’s financial statements, the effect on earnings of changes in depreciation, amortization, or other income effects, if any, as a result of the change to the provisional amounts, calculated as if the accounting had been completed at the acquisition date. It also requires an entity to present separately on the face of the statement of operations or disclose in the notes the portion of the amount recorded in current-period earnings by line items that would have been recorded in previous reporting periods if the adjustment to the provisional amounts had been recognized as of the acquisition date. The Company adopted this new authoritative guidance on January 1, 2016, and it did not have an impact on the Company's statements of operations or financial condition.

ASC Topic 606 "Revenue from Contracts with Customers." New authoritative accounting guidance under ASC Topic 606, "Revenue from Contracts with Customers" amended prior guidance to require an entity to 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 and to provide clarification on identifying performance obligations and licensing implementation guidance. The new authoritative guidance was initially effective for reporting periods after January 1, 2017 but was deferred to

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January 1, 2018. The Company is evaluating the new guidance but does not expect it to have a significant impact on the Company's statements of operations or financial condition.

ASC Topic 825 "Financial Instruments." New authoritative accounting guidance under ASC Topic 825 "Financial Instruments" amended prior guidance to require equity investments (except those accounted for under the equity method of accounting) to be measured at fair value with changes in fair value recognized in net income. An entity may choose to measure equity investments that do not have readily determinable fair values at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or similar investment of the same issuer. The new guidance simplifies the impairment assessment of equity investments without readily determinable fair values, requires public entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes, requires an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from changes in the instrument-specific credit risk when the entity has selected the fair value option for financial instruments and requires separate presentation of financial assets and liabilities by measurement category and form of financial asset. The new authoritative guidance will be effective for reporting periods after January 1, 2018 and is not expected to have a significant impact on the Company's statements of operations or financial condition.

ASC Topic 405 "Liabilities-Extinguishment of Liabilities." New authoritative accounting guidance under ASC Topic 405, "Liabilities-Extinguishment of Liabilities" amended prior guidance to clarify that liabilities related to the sale of prepaid store-value products within the scope of this guidance are financial liabilities and that breakage for those liabilities are to be accounted for consistent with the breakage guidance in ASC Topic 606 "Revenue from Contracts with Customers." The new authoritative guidance will be effective for reporting periods after January 1, 2018. The Company is evaluating the new guidance but does not expect it to have a significant impact on the Company's statements of operations or financial condition.

ASC Topic 842 "Leases." New authoritative accounting guidance under ASC Topic 842 "Leases" amended prior guidance to require lessees to recognize the assets and liabilities arising from all leases on the balance sheet. The new authoritative guidance defines a lease as a contract, or part of a contract, that conveys the right to control the use of identified property, plant, or equipment (an identified asset) for a period of time in exchange for consideration. In addition, the qualifications for a sale and leaseback transaction have been amended. The new authoritative guidance also requires qualitative and quantitative disclosures bylessees and lessors to meet the objective of enabling users of financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases. In transition, lessees and lessors are required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. The new authoritative guidance will be effective for reporting periods after January 1, 2019. The Company is evaluating the new guidance and its impact on the Company's statements of operations and financial condition.

ASC Topic 815 "Derivatives and Hedging." New authoritative accounting guidance under ASC Topic 815 "Derivatives and Hedging" amended prior guidance to clarify that a change in the counterparty to a derivative instrument that has been designated as the hedging instrument does not, in and of itself, require dedesignation of that hedging relationship provided that all other hedge accounting criteria continue to be met. An entity has an option to apply the amendments in this new authoritative guidance on either a prospective basis or a modified retrospective basis. The new authoritative guidance will be effective for reporting periods after January 1, 2017 and early adoption is permitted. This new authoritative guidance is not expected to have a significant impact on the Company's statements of operations or financial condition.

New authoritative accounting guidance under ASC Topic 815 "Derivatives and Hedging" amended prior guidance to clarify what steps are required when assessing whether the economic characteristics and risks of call (put) options are clearly and closely related to the economic characteristics and risks of their debt hosts, which is one of the criteria for bifurcating an embedded derivative. An entity is required to consider whether (1) the payoff is adjusted based on changes in an index, (2) the payoff is indexed to an underlying other than interest rates or credit risk, (3) the debt involves a substantial premium or discount, and (4) the call (put) option is contingently exercisable. An entity should apply this new authoritative guidance on a modified retrospective basis to existing debt instruments as of the beginning of the fiscal year for which the amendments are effective. The new authoritative guidance will be effective for reporting periods after January 1, 2017 and early adoption is permitted. This new authoritative guidance is not expected to have a significant impact on the Company's statements of operations or financial condition.

ASC Topic 323 "Investment - Equity Method and Joint Ventures." New authoritative accounting guidance under ASC Topic 323 "Investment - Equity Method and Joint Ventures" amended prior guidance to eliminate the requirement to retroactively adopt the equity method of accounting as a result of an increase in the level of ownership interest or degree of influence. The new authoritative guidance required that the equity method investor add the cost of acquiring the additional interest in the investee to the current basis of the investor’s previously held interest and adopt the equity method of accounting as of the date the investment becomes qualified for equity method accounting. The new authoritative guidance will be effective for reporting periods after January 1,

9

2017 and early adoption is permitted. This new authoritative guidance is not expected to have a significant impact on the Company's statements of operations or financial condition.

ASC Topic 718 "Compensation - Stock Compensation." New authoritative accounting guidance under ASC Topic 718 "Compensation - Stock Compensation" amended prior guidance on several aspects, including the income tax consequences, classification of awards as either equity or liability, and classification on the statement of cash flows. The new authoritative guidance allows for all excess tax benefits and tax deficiencies to be recognized as income tax benefit or expense in the income statement. The tax effects of exercised or vested awards should be treated as discrete items in the reporting period in which they occur. An entity also should recognize excess tax benefits regardless of whether the benefit reduces taxes payable in the current period. For the statement of cash flows, excess tax benefits should be classified along with other income tax cash flows as an operating activity, and cash paid by an employer when directly withholding shares for tax withholding purposes should be classified as a financing activity. The new authoritative guidance also allows an entity to make an entity-wide accounting policy election to either estimate the number of awards that are expected to vest or account for forfeitures when they occur. In addition, the threshold to qualify for equity classification permits withholding up to the maximum statutory tax rates in the applicable jurisdictions. The new authoritative guidance will be effective for reporting periods after January 1, 2017 and early adoption is permitted. The Company early adopted the new guidance in the third quarter of 2016, and as a result, recorded a $1.8 million tax benefit in the Company's statements of operations. The Company has also elected to account for forfeitures when they occur.

ASC Topic 326 "Financial Instruments - Credit Losses." New authoritative accounting guidance under ASC Topic 326 "Financial Instruments - Credit Losses" amended the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information for credit loss estimates. The measurement of expected credit losses is based on relevant information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. The new authoritative guidance also requires a financial asset (or a group of financial assets) measured at amortized cost basis to be presented at the net amount expected to be collected (net of the allowance for credit losses). In addition, the credit losses relating to available-for-sale debt securities should be recorded through an allowance for credit losses rather than a write-down. The new authoritative guidance will be effective for reporting periods after January 1, 2020. The Company is evaluating the new guidance and its impact on the Company's statements of operations or financial condition.

ASC Topic 230 "Statement of Cash Flows." New authoritative accounting guidance under ASC Topic 230 "Statement of Cash Flows" addresses eight specific cash flow classification issues with the objective of reducing the existing diversity in practice. The new authoritative guidance will be effective for reporting periods after January 1, 2018. This new authoritative guidance is not expected to have a significant impact on the Company's statements of operations or financial condition.

ASC Topic 740 "Income Taxes." New authoritative accounting guidance under ASC Topic 740 "Income Taxes" amends prior guidance to require an entity to recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. The new authoritative guidance will be effective for reporting periods after January 1, 2018. The Company is evaluating the new guidance and its impact on the Company's statements of operations or financial condition.

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Note 3.   Earnings Per Common Share

Earnings per common share is computed using the two-class method. Basic earnings per common share is computed by dividing net income available to common stockholders by the weighted-average number of common shares outstanding during the applicable period, excluding outstanding participating securities. Participating securities include non-vested restricted stock awards and restricted stock units, though no actual shares of common stock related to restricted stock units are issued until the settlement of such units, to the extent holders of these securities receive non-forfeitable dividends or dividend equivalents at the same rate as holders of the Company's common stock. Diluted earnings per common share is computed using the weighted-average number of shares determined for the basic earnings per common share computation plus the dilutive effect of stock compensation using the treasury stock method.

The following table presents a reconciliation of the number of shares used in the calculation of basic and diluted earnings per common share (amounts in thousands, except share and per share data).

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2016		2015		2016		2015
Distributed earnings allocated to common stock	$	16,114	$	12,733	$	42,984	$	36,227
Undistributed earnings	28,305		27,545		83,961		79,114
Net income	44,419		40,278		126,945		115,341
Less: preferred stock dividends	2,004		2,000		6,004		6,000
Net income available to common stockholders for basic earnings per common share	42,415		38,278		120,941		109,341
Plus: preferred stock dividends on convertible preferred stock	4		—		4		—
Less: earnings allocated to participating securities	2		2		6		5
Earnings allocated to common stockholders for diluted earnings per common share	$	42,417	$	38,276	$	120,939	$	109,336
Weighted average shares outstanding for basic earnings per common share	77,506,885		74,297,281		74,780,943		74,478,164
Dilutive effect of equity awards	1,176,285		732,546		946,637		676,421
Weighted average shares outstanding for diluted earnings per common share	78,683,170		75,029,827		75,727,580		75,154,585
Basic earnings per common share	$	0.55	$	0.52	$	1.62	$	1.47
Diluted earnings per common share	0.54		0.51		1.60		1.45

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Note 4.    Business Combinations

MSA, Holding, LLC On December 31, 2015, MB Financial Bank acquired a 100% equity interest in MSA Holdings, LLC, ("MSA") the parent company of MainStreet Investment Advisors, LLC and Cambium Asset Management, LLC. Main Street Advisors provides investment management solutions to the bank trust and independent trust company markets.  Through its registered investment advisor, Cambium LLC, MSA provides efficient, cost-effective account management solutions on a discretionary basis for high net worth clients, both individuals and institutions, and small accounts through its BluePrint portfolio solution.

This business combination was accounted for under the acquisition method of accounting. Accordingly, the results of operations of the acquired company were included in the Company’s results of operations starting on January 1, 2016. Under this method of accounting, assets and liabilities acquired are recorded at their estimated fair values, net of applicable income tax effects. The excess cost over fair value of net assets acquired was recorded as goodwill. The Company recorded $13.5 million in goodwill and $8.8 million in other intangibles as a result of this acquisition. The amounts recognized for the business combination in the financial statements as of June 30, 2016 were determined to be final.

American Chartered Bancorp, Inc. Effective August 24, 2016, American Chartered Bancorp, Inc. ("American Chartered"), an Illinois corporation, was merged (the "Merger") with and into MB Financial, Inc., a Maryland corporation ("MB Financial"), pursuant to the Agreement and Plan of Merger, dated as of November 20, 2015 (the "Merger Agreement"), by and between MB Financial and American Chartered. This transaction continues to solidify the Company's market position in Chicago. At the effective time of the Merger (the "Effective Time"), (i) each share of the common stock, no par value, of American Chartered ("American Chartered Common Stock") that was issued and outstanding immediately prior to the Effective Time, (ii) each share of American Chartered’s 8% Cumulative Voting Convertible Preferred Stock, Series D ("American Chartered Series D Preferred Stock"), that was issued and outstanding immediately prior to the Effective Time whose holder elected pursuant to American Chartered’s charter to receive the same consideration in the Merger as holders of American Chartered Common Stock, based on the number of shares of American Chartered Common Stock into which such share of American Chartered Series D Preferred Stock would otherwise then be convertible, and (iii) each share of American Chartered Non-Voting Perpetual Preferred Stock, Series F, that was issued and outstanding immediately prior to the Effective Time, was converted into the right to receive, subject to the election and proration procedures set forth in the Merger Agreement: (1) cash in the amount of $9.30 (the "Cash Consideration") or (2) 0.2732 shares of the Company's common stock, with cash paid in lieu of fractional Company shares determined by multiplying the fractional Company share amount by $39.01 (the average closing sale price of the Company's common stock for the five full trading days ending on August 23, 2016) (the "Stock Consideration"). The holders of such shares of American Chartered stock also could elect to receive a combination of the Cash Consideration and the Stock Consideration for their shares. Each share of American Chartered Series D Preferred Stock whose holder did not elect to receive the same consideration in the Merger as holders of American Chartered Common Stock, based on the number of shares of American Chartered Common Stock into which such share of American Chartered Series D Preferred Stock would otherwise then be convertible, was converted into the right to receive one share of the Company's 8% cumulative voting convertible preferred stock, Series B. Consideration paid was $487.4 million, including $382.8 million in common stock (9.7 million shares), $102.3 million in cash and $2.3 million in preferred stock and stock-based awards assumed. The $102.3 million in cash consideration includes payments for the value of the net option shares of the American Chartered stock options pursuant to the Agreement and Plan of Merger.

This business combination was accounted for under the acquisition method of accounting. Accordingly, the results of operations of the acquired company have been included in the Company’s results of operations since the date of acquisition. Under this method of accounting, the assets acquired, liabilities assumed and consideration paid are recorded at their estimated fair values. The excess cost over fair value of net assets acquired is recorded as goodwill. In the event that the fair value of net assets acquired exceeds the cost, the Company will record a gain on the acquisition. As the consideration paid for American Chartered exceeded the net assets acquired, goodwill of $268.8 million was recorded on the acquisition and allocated to the banking segment. Goodwill recorded in the transaction, which reflects the increased Chicago market share and related synergies expected from the combined operations, is not tax deductible. The amounts recognized for the business combination in the financial statements as of September 30, 2016 have been determined only provisionally as fair values continue to be assessed.

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Estimated fair values of the assets acquired and liabilities assumed in the American Chartered transaction, as of the closing date of the transaction were as follows (in thousands):

	August 24, 2016
ASSETS
Cash and cash equivalents	$	93,307
Investment securities available for sale	505,564
Non-marketable securities - FRB and FHLB Stock	16,000
Loans	1,952,826
Premises and equipment	39,061
Cash surrender value of life insurance	59,917
Goodwill	268,758
Other intangibles	25,500
Other real estate owned	4,148
Other assets	27,615
Total assets	$	2,992,696
LIABILITIES
Deposits	$	2,389,423
Short-term borrowings	48,305
Long-term borrowings	16,000
Junior subordinated notes issued to capital trusts	28,075
Accrued expenses and other liabilities	23,477
Total liabilities	$	2,505,280
Total identifiable net assets	$	487,416
Consideration:
Market value of common stock at $39.28 per share at August 24, 2016 (9,744,636 shares of common stock issued)	$	382,769
Series B preferred stock at $2,337.97 per share at August 24, 2016 (525 shares of preferred stock issued) (1)	1,227
Stock-based compensation attributed to pre-business combination service	1,103
Cash paid	102,317
Total fair value of consideration, excluding Series B preferred stock	$	487,416

⁽¹⁾  Per share fair value amount determined as if the shares of Series B were converted into shares common stock.

Purchased loans acquired in a business combination are recorded at estimated fair value on their purchase date without a carryover of the related allowance for loan and lease losses. These acquired loans are segregated into three types: pass rated loans with no discount attributable to credit quality, non-impaired loans with a discount attributable at least in part to credit quality and impaired loans with evidence of significant credit deterioration.  

• Pass rated loans (typically performing loans) are accounted for in accordance with ASC 310-20 "Nonrefundable Fees and Other Costs" as these loans do not have evidence of credit deterioration since origination.

• Non-impaired loans (typically performing substandard loans) are accounted for in accordance with ASC 310-30 if they display at least some level of credit deterioration since origination.

• Impaired loans (typically substandard loans on non-accrual status) are accounted for in accordance with ASC 310-30 as they display significant credit deterioration since origination.

For pass rated loans (non-purchased credit-impaired loans), the difference between the estimated fair value of the loans and the principal outstanding is accreted over the remaining life of the loans. The accretable discount for the non-purchased credit-impaired loans was $29.0 million as of the date of the acquisition.

In accordance with ASC 310-30, for both purchased non-impaired loans (performing substandard loans) and purchased credit-impaired loans, the loans are pooled by loan type and the difference between contractually required payments at acquisition and the cash flows expected to be collected is referred to as the non-accretable difference. Further, any excess of cash flows expected at acquisition over the estimated fair value is referred to as the accretable yield and is recognized into interest income over the remaining life of the loan pools when there is a reasonable expectation about the amount and timing of such cash flows. The non-accretable and accretable discount for the purchased credit-impaired loans was $4.3 million and $805 thousand, respectively, as of the date of the acquisition.

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The following table presents the acquired loans as of the acquisition date (in thousands):

	Purchased Credit-Impaired Loans		Purchased Non-Credit-Impaired Loans
Fair value	$	24,575	$	1,928,251
Gross contractual amounts receivable	31,408		2,207,765
Best estimate of contractual cash flows not expected to be collected (1)	5,048		129,027
Best estimate of contractual cash flows expected to be collected	26,360		2,078,738

⁽¹⁾  Includes interest payments not expected to be collected due to loan prepayments as well as principal and interest payments not expected to be collected due to customer default.

The Company incurred costs of $1.8 million directly related to the consummation of the merger for the nine months ended September 30, 2016, which is recorded in professional and legal fees on the statement of operations. The data processing systems were converted in September 2016.

The following table provides the unaudited pro forma information for the results of operations for the nine months ended September 30, 2016 and 2015, as if the acquisition had occurred January 1, 2015. The pro forma results combine the historical results of American Chartered into the Company's consolidated statement of operations including the impact of certain acquisition accounting adjustments including loan discount accretion, investment securities discount accretion, intangible assets amortization, deposit premium accretion and borrowing discount amortization. The pro forma results have been prepared for comparative purposes only and are not necessarily indicative of the results that would have been obtained had the acquisition actually occurred on January 1, 2015. No assumptions have been applied to the pro forma results of operations regarding possible revenue enhancements, provision for credit losses, expense efficiencies or asset dispositions. The merger related expenses that have been recognized are included in net income in the table below.

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2016		2015		2016		2015
(in thousands)
Total revenues (net interest income plus non-interest income)	$	256,866	$	228,099	$	731,987	$	678,735
Net income	48,432		50,581		147,078		141,751

Revenues and earnings of the acquired company since the acquisition date have not been disclosed as it is not practicable as American Chartered was merged into the Company and separate financial information is not readily available.

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Note 5. Investment Securities

Amortized cost and fair value of investment securities were as follows as of the dates indicated (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
September 30, 2016
Available for Sale
U.S. Government sponsored agencies and enterprises	$	53,456	$	512	$	—		$	53,968
States and political subdivisions	383,041		27,914		(218		)	410,737
Residential mortgage-backed securities	1,066,834		10,948		(1,445		)	1,076,337
Commercial mortgage-backed securities	93,962		3,203		(172		)	96,993
Corporate bonds	208,940		2,167		(914		)	210,193
Equity securities	10,932		196		—			11,128
Total Available for Sale	1,817,165		44,940		(2,749		)	1,859,356
Held to Maturity
States and political subdivisions	939,491		53,682		(33		)	993,140
Residential mortgage-backed securities	175,771		6,927		—			182,698
Total Held to Maturity	1,115,262		60,609		(33		)	1,175,838
Total	$	2,932,427	$	105,549	$	(2,782	)	$	3,035,194
December 31, 2015
Available for Sale
U.S. Government sponsored agencies and enterprises	$	63,805	$	806	$	—		$	64,611
States and political subdivisions	373,285		23,083		(1		)	396,367
Residential mortgage-backed securities	759,816		7,363		(3,630		)	763,549
Commercial mortgage-backed securities	128,509		1,839		(241		)	130,107
Corporate bonds	222,784		815		(3,971		)	219,628
Equity securities	10,757		4		—			10,761
Total Available for Sale	1,558,956		33,910		(7,843		)	1,585,023
Held to Maturity
States and political subdivisions	1,016,519		36,874		(638		)	1,052,755
Residential mortgage-backed securities	214,291		7,721		—			222,012
Total Held to Maturity	1,230,810		44,595		(638		)	1,274,767
Total	$	2,789,766	$	78,505	$	(8,481	)	$	2,859,790

The Company has no direct exposure to the State of Illinois, but approximately 21% of the state and political subdivisions portfolio consisted of securities issued by municipalities located in Illinois as of September 30, 2016. Approximately 97% of the state and political subdivisions securities were general obligation issues, and 48% were insured or had another form of credit enhancement as of September 30, 2016.

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Unrealized losses on investment securities by length of time in a continuous unrealized loss position and the fair value of the related securities at September 30, 2016 were as follows (in thousands):

	Less Than 12 Months					12 Months or More					Total
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
	Value		Losses			Value		Losses			Value		Losses
Available for Sale
States and political subdivisions	$	20,526	$	(218	)	$	—	$	—		$	20,526	$	(218	)
Residential mortgage-backed securities	374,312		(1,214		)	27,699		(231		)	402,011		(1,445		)
Commercial mortgage-backed securities	71		(1		)	11,664		(171		)	11,735		(172		)
Corporate bonds	9,834		(155		)	19,950		(759		)	29,784		(914		)
Total Available for Sale	404,743		(1,588		)	59,313		(1,161		)	464,056		(2,749		)
Held to Maturity
States and political subdivisions	31,142		(32		)	387		(1		)	31,529		(33		)
Total	$	435,885	$	(1,620	)	$	59,700	$	(1,162	)	$	495,585	$	(2,782	)

Unrealized losses on investment securities by length of time in a continuous unrealized loss position and the fair value of the related securities at December 31, 2015 were as follows (in thousands):

	Less Than 12 Months					12 Months or More					Total
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
	Value		Losses			Value		Losses			Value		Losses
Available for Sale
States and political subdivisions	$	219	$	(1	)	$	—	$	—		$	219	$	(1	)
Residential mortgage-backed securities	357,877		(2,835		)	43,566		(795		)	401,443		(3,630		)
Commercial mortgage-backed securities	2,324		(5		)	11,809		(236		)	14,133		(241		)
Corporate bonds	73,774		(1,164		)	18,286		(2,807		)	92,060		(3,971		)
Total Available for Sale	434,194		(4,005		)	73,661		(3,838		)	507,855		(7,843		)
Held to Maturity
States and political subdivisions	66,152		(519		)	6,190		(119		)	72,342		(638		)
Total	$	500,346	$	(4,524	)	$	79,851	$	(3,957	)	$	580,197	$	(8,481	)

The total number of security positions in the investment portfolio in an unrealized loss position at September 30, 2016 was 271 compared to 193 at December 31, 2015. This increase in total number of security positions in a continuous unrealized loss position from December 31, 2015 to September 30, 2016 was mainly attributable to the mortgage-backed securities in the investment securities portfolio.  Declines in the fair value of available for sale securities below their cost that are deemed to be other than temporary are reflected in earnings as realized losses to the extent the impairment is related to credit losses. The amount of the impairment related to other factors is recognized in other comprehensive income. In estimating other-than-temporary impairment losses, management considers, among other things, (i) the length of time and the extent to which the fair value has been less than cost, (ii) the financial condition and near-term prospects of the issuer, and (iii) whether the Company is more likely than not to sell the security before recovery of its cost basis.

As of September 30, 2016, management does not have the intent to sell any of the securities in the table above at September 30, 2016 and believes that it is more likely than not that the Company will not have to sell any such securities before a recovery of cost. The fair value is expected to recover as the securities approach their maturity date or repricing date or if market yields for such investments decline. Accordingly, as of September 30, 2016, management believes the impairments detailed in the table above at September 30, 2016 are temporary.

Changes in market interest rates can significantly influence the fair value of securities, and the fair value of our municipal securities portfolio would decline substantially if interest rates increase materially.

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Net gains (losses) recognized on investment securities available for sale were as follows (in thousands):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2016		2015		2016			2015
Realized gains	$	—	$	371	$	323		$	1,454
Realized losses	—		—		(54		)	(1,627		)
Net gains (losses)	$	—	$	371	$	269		$	(173	)

The amortized cost and fair value of investment securities as of September 30, 2016 by contractual maturity are shown below. Maturities may differ from contractual maturities in mortgage-backed securities because the mortgages underlying the securities may be called or repaid without any penalties. Therefore, mortgage-backed securities are not included in the maturity categories in the following maturity summary.

	Amortized		Fair
(In thousands)	Cost		Value
Available for sale:
Due in one year or less	$	81,215	$	81,620
Due after one year through five years	267,485		273,115
Due after five years through ten years	44,899		46,964
Due after ten years	251,838		273,199
Equity securities	10,932		11,128
Residential and commercial mortgage-backed securities	1,160,796		1,173,330
	1,817,165		1,859,356
Held to maturity:
Due in one year or less	87,409		87,524
Due after one year through five years	146,995		151,557
Due after five years through ten years	159,780		171,871
Due after ten years	545,307		582,188
Residential mortgage-backed securities	175,771		182,698
	1,115,262		1,175,838
Total	$	2,932,427	$	3,035,194

Investment securities with a carrying amount of $1.2 billion at September 30, 2016 and $1.4 billion at December 31, 2015 were pledged as collateral on public deposits and for other purposes as required or permitted by law, while only $839.3 million and $878.2 million were required to be pledged at September 30, 2016 and December 31, 2015, respectively. Of those pledged, the Company had investment securities pledged as collateral for advances from the Federal Home Loan Bank of $108.8 million at December 31, 2015 and none were pledged at September 30, 2016.

17

Note 6. Loans

Loans consist of the following at (in thousands):

	September 30, 2016		December 31, 2015
Commercial loans	$	4,385,812	$	3,616,286
Commercial loans collateralized by assignment of lease payments	1,873,380		1,779,072
Commercial real estate	3,794,801		2,695,676
Residential real estate	998,827		628,169
Construction real estate	451,023		252,060
Indirect vehicle	522,271		384,095
Home equity	275,288		216,573
Other consumer loans	77,956		80,661
Total loans, excluding purchased credit-impaired loans	12,379,358		9,652,592
Purchased credit-impaired loans	161,338		141,406
Total loans	$	12,540,696	$	9,793,998

Loans are made to individuals as well as commercial and tax exempt entities. Specific loan terms vary as to interest rate, repayment, and collateral requirements based on the type of loan requested and the credit worthiness of the prospective borrower. Except for commercial loans collateralized by assignment of lease payments, asset-based loans, residential real estate loans and indirect vehicle loans, credit risk tends to be geographically concentrated in that a majority of the loan customers are located in the markets serviced by MB Financial Bank.

The Company's extension of credit is governed by its Credit Risk Policy, which was established to control the quality of the Company's loans. This policy is reviewed and approved by the Enterprise Risk Committee of the Company's Board of Directors on an annual basis.

Commercial Loans. Commercial credit is extended primarily to emerging middle market and middle market customers. Such credits are typically comprised of working capital loans, loans for physical asset expansion, asset acquisition loans and other business loans. Loans to closely held businesses will generally be guaranteed in full or for a significant amount by the businesses' principal owners. Commercial loans are made based primarily on the historical and projected cash flow of the borrower and secondarily on the underlying collateral provided by the borrower. The cash flows of borrowers, however, may not behave as forecasted and collateral securing loans may fluctuate in value due to economic or individual performance factors. Minimum standards and underwriting guidelines have been established for all commercial loan types. Asset-based loans, also included in commercial loans, are made to businesses with the primary source of repayment derived from payments on the related assets securing the loan. Collateral for these loans may include accounts receivable, inventory and equipment, and is monitored regularly to ensure ongoing sufficiency of collateral coverage and quality. The primary risk for these loans is a significant decline in collateral values due to general market conditions. Loan terms that mitigate these risks include typical industry amortization schedules, percentage of collateral advances, maintenance of cash collateral accounts and regular asset monitoring. Because of the national scope of our asset-based lending, the risk of these loans is also diversified by geography.

Commercial Loans Collateralized by Assignment of Lease Payments ("Lease Loans"). The Company makes lease loans to lessors where the underlying leases are with both investment grade and non-investment grade companies. Investment grade lessees are companies rated in one of the four highest categories by Moody's Investor Services or Standard & Poor's Rating Services or, in the event the related lessee has not received any such rating, where the related lessee would be viewed under the underwriting policies of the Company as an investment grade company. Whether or not companies fall into this category, each lease loan is considered on its individual merit based on the financial wherewithal of the lessee using financial information available at the time of underwriting.

Commercial Real Estate Loans. Commercial real estate loans are subject to underwriting standards and processes similar to commercial loans. These loans are viewed primarily as cash flow loans and the repayment of these loans is largely dependent on the successful operation of the property. Loan performance may be adversely affected by factors impacting the general economy or conditions specific to the real estate market such as geographic location and/or property type.

18

Construction Real Estate Loans. The Company defines construction loans as loans where the loan proceeds are controlled by the Company and used exclusively for the improvement of real estate in which the Company holds a mortgage. Due to the inherent risk in this type of loan, they are subject to other industry specific policy guidelines outlined in the Company's Credit Risk Policy.

Consumer Related Loans. The Company originates direct and indirect consumer loans, including primarily residential real estate, home equity lines and loans, credit cards, and indirect vehicle loans (motorcycle, marine, recreational and powersports vehicles). Each loan type is underwritten based upon several factors including debt to income, type of collateral and loan to collateral value, credit history and the Company's relationship with the borrower. Indirect loan and credit card underwriting involves the use of risk-based pricing in the underwriting process.

Purchased credit-impaired loans. Purchased credit-impaired loans are loans accounted for under ASC 310-30, which include purchased credit-impaired loans acquired through a business combination, FDIC-assisted transactions and re-purchase transactions with the Government National Mortgage Association ("GNMA"). The loans re-purchased from GNMA were originally sold by the Company with servicing retained and subsequently became delinquent. These loans are also insured by the Federal Housing Administration (commonly referred to as "FHA") or the U.S. Department of Veterans Affairs (commonly referred to as "VA") where the Company would be able to recover the principal balance of these loans. All re-purchases from GNMA are at the Company's discretion.

A collateral pledge agreement exists whereby at all times, the Company must keep on hand, free of all other pledges, liens, and encumbrances, first mortgage loans and home equity loans with unpaid principal balances aggregating no less than 133% for first mortgage loans and 250% for home equity loans of the outstanding advances from the Federal Home Loan Bank.  As of September 30, 2016 and December 31, 2015, the Company had $4.9 billion and $3.2 billion, respectively, of loans pledged as collateral for long-term Federal Home Loan Bank advances and third party letters of credit, while only $3.1 billion and $2.2 billion were required to be pledged at September 30, 2016 and December 31, 2015, respectively.

19

The following table presents the contractual aging of the recorded investment in past due loans by class of loans as of September 30, 2016 and December 31, 2015 (in thousands):

	Current		30-59 Days Past Due		60-89 Days Past Due		Loans Past Due 90 Days or More		Total Past Due		Total
September 30, 2016
Commercial	$	4,376,819	$	2,649	$	104	$	6,240	$	8,993	$	4,385,812
Commercial collateralized by assignment of lease payments	1,855,322		12,141		4,672		1,245		18,058		1,873,380
Commercial real estate:
Healthcare	572,228		—		—		—		—		572,228
Industrial	854,045		298		1,289		—		1,587		855,632
Multifamily	549,486		141		366		113		620		550,106
Retail	522,696		333		235		453		1,021		523,717
Office	416,965		1,336		49		—		1,385		418,350
Other	871,881		1,646		532		709		2,887		874,768
Residential real estate	986,386		2,347		1,739		8,355		12,441		998,827
Construction real estate	451,023		—		—		—		—		451,023
Indirect vehicle	518,881		2,301		716		373		3,390		522,271
Home equity	270,028		1,475		490		3,295		5,260		275,288
Other consumer	77,570		166		129		91		386		77,956
Total loans, excluding purchased credit-impaired loans	12,323,330		24,833		10,321		20,874		56,028		12,379,358
Purchased credit-impaired loans	92,346		1,108		5,848		62,036		68,992		161,338
Total loans	$	12,415,676	$	25,941	$	16,169	$	82,910	$	125,020	$	12,540,696
Non-performing loan aging	$	31,009	$	373	$	1,801	$	20,726	$	22,900	$	53,909
December 31, 2015
Commercial	$	3,586,372	$	22,956	$	97	$	6,861	$	29,914	$	3,616,286
Commercial collateralized by assignment of lease payments	1,758,839		3,399		5,902		10,932		20,233		1,779,072
Commercial real estate:
Healthcare	476,939		—		—		—		—		476,939
Industrial	400,182		—		—		757		757		400,939
Multifamily	399,333		622		88		934		1,644		400,977
Retail	410,958		6,189		7,411		180		13,780		424,738
Office	223,935		58		—		5,189		5,247		229,182
Other	760,530		622		82		1,667		2,371		762,901
Residential real estate	612,573		5,193		1,729		8,674		15,596		628,169
Construction real estate	252,060		—		—		—		—		252,060
Indirect vehicle	380,899		2,085		698		413		3,196		384,095
Home equity	207,818		1,774		1,398		5,583		8,755		216,573
Other consumer	80,225		254		84		98		436		80,661
Total loans, excluding purchased credit-impaired loans	9,550,663		43,152		17,489		41,288		101,929		9,652,592
Purchased credit-impaired loans	81,250		3,311		4,439		52,406		60,156		141,406
Total loans	$	9,631,913	$	46,463	$	21,928	$	93,694	$	162,085	$	9,793,998
Non-performing loan aging	$	44,290	$	9,827	$	9,367	$	41,177	$	60,371	$	104,661

20

The following table presents the recorded investment in non-accrual loans and loans past due ninety days or more and still accruing by class of loans, excluding purchased credit-impaired loans, as of September 30, 2016 and December 31, 2015 (in thousands):

	September 30, 2016				December 31, 2015
			Loans past due				Loans past due
	Non-accrual		90 days or more and still accruing		Non-accrual		90 days or more and still accruing
Commercial	$	8,583	$	1,166	$	24,689	$	42
Commercial collateralized by assignment of lease payments	4,996		153		7,027		5,318
Commercial real estate:
Healthcare	—		—		—		—
Industrial	278		—		1,136		—
Multifamily	2,648		—		3,415		—
Office	447		—		4,496		693
Retail	607		—		17,594		—
Other	531		144		1,544		195
Residential real estate	16,781		220		17,951		253
Construction real estate	—		—		—		—
Indirect vehicle	1,955		—		2,046		—
Home equity	15,300		—		18,156		—
Other consumer	9		91		11		95
Total	$	52,135	$	1,774	$	98,065	$	6,596

The Company utilizes an internal asset classification system as a means of reporting problem and potential problem loans. Under the Company's risk rating system, the Company classifies potential problem and problem loans as “Special Mention,” “Substandard,” and “Doubtful.” Substandard loans include those characterized by the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected. Loans classified as Doubtful have all the weaknesses inherent in those classified as Substandard with the added characteristic that the weaknesses present make collection or liquidation in full, on the basis of currently existing facts, conditions and values, highly questionable and improbable. Loans that do not currently expose the Company to sufficient risk to warrant classification in one of the aforementioned categories but possess weaknesses that deserve management's close attention are deemed to be Special Mention. Risk ratings are updated any time the situation warrants and at least annually. Loans listed as not rated are included in groups of homogeneous loans with similar risk and loss characteristics.

21

The following tables present the risk category of loans by class of loans based on the most recent analysis performed, excluding purchased credit-impaired loans, as of September 30, 2016 and December 31, 2015 (in thousands):

	Pass		Special Mention		Substandard		Doubtful		Total
September 30, 2016
Commercial	$	4,163,243	$	131,163	$	91,406	$	—	$	4,385,812
Commercial collateralized by assignment of lease payments	1,859,012		5,504		8,864		—		1,873,380
Commercial real estate:
Healthcare	555,166		17,062		—		—		572,228
Industrial	831,090		23,751		791		—		855,632
Multifamily	546,183		312		3,611		—		550,106
Retail	514,299		8,646		772		—		523,717
Office	409,124		5,086		4,140		—		418,350
Other	828,578		26,085		20,105		—		874,768
Construction real estate	451,023		—		—		—		451,023
Total	$	10,157,718	$	217,609	$	129,689	$	—	$	10,505,016
December 31, 2015
Commercial	$	3,373,943	$	115,548	$	126,795	$	—	$	3,616,286
Commercial collateralized by assignment of lease payments	1,760,674		4,367		14,031		—		1,779,072
Commercial real estate:
Healthcare	472,599		4,340		—		—		476,939
Industrial	380,200		19,011		1,728		—		400,939
Multifamily	396,117		595		4,265		—		400,977
Retail	393,543		13,310		17,885		—		424,738
Office	216,584		3,797		8,801		—		229,182
Other	730,713		6,193		25,995		—		762,901
Construction real estate	252,060		—		—		—		252,060
Total	$	7,976,433	$	167,161	$	199,500	$	—	$	8,343,094

Approximately $18.1 million and $59.6 million of the substandard loans were non-performing as of September 30, 2016 and December 31, 2015, respectively.

For residential real estate, home equity, indirect vehicle and other consumer loan classes, which are not rated, the Company evaluates credit quality based on the aging status of the loan, which was previously presented, and by payment activity. The following table presents the recorded investment in those loan classes based on payment activity, excluding purchased credit-impaired loans, as of September 30, 2016 and December 31, 2015 (in thousands):

	Performing		Non-performing		Total
September 30, 2016
Residential real estate	$	981,826	$	17,001	$	998,827
Indirect vehicle	520,316		1,955		522,271
Home equity	259,988		15,300		275,288
Other consumer	77,856		100		77,956
Total	$	1,839,986	$	34,356	$	1,874,342
December 31, 2015
Residential real estate	$	609,965	$	18,204	$	628,169
Indirect vehicle	382,049		2,046		384,095
Home equity	198,417		18,156		216,573
Other consumer	80,555		106		80,661
Total	$	1,270,986	$	38,512	$	1,309,498

The recorded investment in residential mortgage loans secured by residential real estate properties for which foreclosure proceedings are in process totaled $23.6 million and $20.8 million at September 30, 2016 and December 31, 2015, respectively.

22

The following tables present loans individually evaluated for impairment by class of loans, excluding purchased credit-impaired loans, as of September 30, 2016 and December 31, 2015 (in thousands):

	September 30, 2016
									Three Months Ended				Nine Months Ended
	Unpaid Principal Balance		Recorded Investment		Partial Charge-offs		Allowance for Loan Losses Allocated		Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
With no related allowance recorded:
Commercial	$	1,808	$	1,808	$	—	$	—	$	1,871	$	—	$	2,377	$	—
Commercial collateralized by assignment of lease payments	1,161		794		367		—		1,141		27		1,026		27
Commercial real estate:
Healthcare	—		—		—		—		—		—		—		—
Industrial	—		—		—		—		—		—		536		—
Multifamily	1,981		1,981		—		—		2,334		—		2,362		—
Retail	2,683		943		1,740		—		949		—		2,577		—
Office	—		—		—		—		—		—		342		—
Other	—		—		—		—		—		—		80		—
Residential real estate	—		—		—		—		—		—		—		—
Construction real estate	—		—		—		—		—		—		—		—
Indirect vehicle	218		125		93		—		277		—		292		—
Home equity	—		—		—		—		—		—		192		—
Other consumer	—		—		—		—		—		—		—		—
With an allowance recorded:
Commercial	17,476		17,476		—		5,401		19,180		—		26,513		—
Commercial collateralized by assignment of lease payments	7,260		7,260		—		3,933		5,086		—		3,201		18
Commercial real estate:
Healthcare	—		—		—		—		—		—		—		—
Industrial	—		—		—		—		—		—		—		—
Multifamily	—		—		—		—		—		—		—		—
Retail	3,606		3,606		—		363		3,612		—		7,911		—
Office	—		—		—		—		—		—		995		—
Other	—		—		—		—		—		—		314		—
Residential real estate	15,117		13,268		1,849		2,394		13,325		—		13,068		—
Construction real estate	—		—		—		—		—		—		—		—
Indirect vehicle	—		—		—		—		—		—		—		—
Home equity	29,688		27,276		2,412		3,252		27,443		—		28,635		—
Other consumer	—		—		—		—		—		—		—		—
Total	$	80,998	$	74,537	$	6,461	$	15,343	$	75,218	$	27	$	90,421	$	45

23

	December 31, 2015
									Year Ended
	Unpaid Principal Balance		Recorded Investment		Partial Charge-offs		Allowance for Loan Losses Allocated		Average Recorded Investment		Interest Income Recognized
With no related allowance recorded:
Commercial	$	11,253	$	11,253	$	—	$	—	$	6,628	$	—
Commercial collateralized by assignment of lease payments	3,453		2,949		504		—		1,035		54
Commercial real estate:
Healthcare	—		—		—		—		—		—
Industrial	820		757		63		—		3,467		—
Multifamily	575		575		—		—		1,540		17
Retail	7,872		6,131		1,741		—		2,768		—
Office	1,608		1,031		577		—		1,663		—
Other	—		—		—		—		965		—
Residential real estate	970		970		—		—		717		—
Construction real estate	—		—		—		—		—		—
Indirect vehicle	—		—		—		—		—		—
Home equity	927		927		—		—		1,000		—
Other consumer	—		—		—		—		—		—
With an allowance recorded:
Commercial	23,394		23,394		—		7,523		18,820		—
Commercial collateralized by assignment of lease payments	3,297		3,297		—		1,790		4,013		104
Commercial real estate:
Healthcare	—		—		—		—		—		—
Industrial	—		—		—		—		228		—
Multifamily	2,155		2,155		—		17		3,307		27
Retail	16,034		16,034		—		4,926		8,885		—
Office	2,929		2,929		—		1,717		2,457		—
Other	592		592		—		199		9,629		—
Residential real estate	12,950		12,769		181		2,634		13,484		—
Construction real estate	—		—		—		—		214		—
Indirect vehicle	119		119		—		—		287		—
Home equity	28,696		28,583		113		3,131		27,747		—
Other consumer	—		—		—		—		—		—
Total	$	117,644	$	114,465	$	3,179	$	21,937	$	108,854	$	202

Impaired loans included accruing restructured loans of $28.6 million and $27.0 million that have been modified and are performing in accordance with those modified terms as of September 30, 2016 and December 31, 2015, respectively.  In addition, impaired loans included $23.4 million and $23.6 million of non-performing restructured loans as of September 30, 2016 and December 31, 2015, respectively.

Loans may be restructured in an effort to maximize collections from financially distressed borrowers. We use various restructuring techniques, including, but not limited to, deferring past due interest or principal, implementing an A/B note structure, redeeming past due taxes, reducing interest rates, extending maturities and modifying amortization schedules. Residential real estate loans are restructured in an effort to minimize losses while allowing borrowers to remain in their primary residences when possible. Programs that we offer to residential real estate borrowers include the Home Affordable Refinance Program (“HARP”), a restructuring program similar to the Home Affordable Modification Program (“HAMP”) for first mortgage borrowers, the Second Lien Modification Program (“2MP”) and similar programs for home equity borrowers in keeping with the restructuring techniques discussed above.

24

Periodically, the Company will restructure a note into two separate notes (A/B structure), charging off the entire B portion of the note. The A note is structured with appropriate loan-to-value and cash flow coverage ratios that provide for a high likelihood of repayment. The A note is classified as a non-performing note until the borrower has displayed a historical payment performance for a reasonable time prior to and subsequent to the restructuring. A period of sustained repayment for at least six months generally is required to return the note to accrual status provided that management has determined that the performance is reasonably expected to continue. The A note will be classified as a restructured note (either performing or non-performing) through the calendar year of the restructuring that the historical payment performance has been established. As of September 30, 2016 and December 31, 2015, there was one A/B structure with a recorded investment of $943 thousand and $1.0 million, respectively, which is included above as an accruing restructured loan. 

A loan classified as a troubled debt restructuring will no longer be included in the troubled debt restructuring disclosures in the years after the restructuring if the loan performs in accordance with the terms specified by the restructuring agreement and the interest rate specified in the restructuring agreement represents a market rate at the time of modification. The specified interest rate is considered a market rate when the interest rate is equal to or greater than the rate the Company is willing to accept at the time of restructuring for a new loan with comparable risk. If there are concerns that the borrower will not be able to meet the modified terms of the loan, the loan will continue to be included in the troubled debt restructuring disclosures.

Impairment analyses on commercial-related loans classified as troubled debt restructurings are performed in conjunction with the normal allowance for loan and lease losses process. Consumer loans classified as troubled debt restructurings are aggregated in two pools that share common risk characteristics, home equity and residential real estate loans, with impairment measured on a quarterly basis based on the present value of expected future cash flows discounted at the loan's effective interest rate.

The following table presents loans that were restructured during the three months ended September 30, 2016 (dollars in thousands):

	September 30, 2016
	Number of Loans	Pre-Modification Recorded Investment		Post-Modification Recorded Investment		Charge-offs and Specific Reserves
Performing:
Residential real estate	2	$	101	$	101	$	18
Home equity	2	102		102		12
Total	4	$	203	$	203	$	30
Non-Performing:
Commercial	3	$	5,874	$	5,874	$	1,490
Residential real estate	4	484		484		85
Indirect vehicle	7	34		34		17
Home equity	5	489		489		72
Total	19	$	6,881	$	6,881	$	1,664

25

The following table presents loans that were restructured during the nine months endedSeptember 30, 2016 (dollars in thousands):

	September 30, 2016
	Number of Loans	Pre-Modification Recorded Investment		Post-Modification Recorded Investment		Charge-offs and Specific Reserves
Performing:
Commercial	1	$	1,870	$	1,870	$	412
Residential real estate	2	101		101		18
Home equity	4	511		511		12
Total	7	$	2,482	$	2,482	$	442
Non-Performing:
Commercial	7	$	14,481	$	14,481	$	4,990
Residential real estate	6	639		639		85
Indirect vehicle	25	183		183		60
Home equity	28	3,600		3,600		138
Total	66	$	18,903	$	18,903	$	5,273

The following table presents loans that were restructured during the three months ended September 30, 2015 (dollars in thousands):

	September 30, 2015
	Number of Loans	Pre-Modification Recorded Investment		Post-Modification Recorded Investment		Charge-offs and Specific Reserves
Performing:
Home equity	4	$	477	$	477	$	—
Total	4	$	477	$	477	$	—
Non-Performing:
Indirect vehicle	7	$	45	$	45	$	16
Home equity	4	550		550		8
Total	11	$	595	$	595	$	24

The following table presents loans that were restructured during the nine months endedSeptember 30, 2015 (dollars in thousands):

	September 30, 2015
	Number of Loans	Pre-Modification Recorded Investment		Post-Modification Recorded Investment		Charge-offs and Specific Reserves
Performing:
Commercial	1	$	80	$	80	$	—
Home equity	16	4,290		4,290		—
Total	17	$	4,370	$	4,370	$	—
Non-Performing:
Commercial real estate:
Multifamily	1	$	334	$	334	$	—
Residential real estate	1	140		140		17
Indirect vehicle	13	75		75		23
Home equity	9	1,348		1,348		130
Total	24	$	1,897	$	1,897	$	170

26

Of the troubled debt restructurings entered into during the past twelve months, $224 thousand subsequently defaulted during the nine months endedSeptember 30, 2016.  Performing troubled debt restructurings are considered to have defaulted when they become 90 days or more past due post-restructuring or are placed on non-accrual status.

The following table presents the troubled debt restructurings activity during the nine months endedSeptember 30, 2016 (in thousands):

	Performing			Non-performing
Beginning balance	$	26,991		$	23,619
Additions	2,482			18,903
Charge-offs	—			(1,046		)
Principal payments, net	(2,145		)	(8,695		)
Removals	(1,655		)	(6,384		)
Transfer to other real estate owned	—			(112		)
Transfers in	3,677			789
Transfers out	(789		)	(3,677		)
Ending balance	$	28,561		$	23,397

Loans removed from troubled debt restructuring status are those that were restructured in a previous calendar year at a market rate of interest and have performed in compliance with the modified terms.

The following table presents the type of modification for loans that have been restructured during the nine months endedSeptember 30, 2016 (in thousands):

	September 30, 2016
	Extended
	Maturity,				Delay in
	Amortization		Extended		Payments or
	and Reduction		Maturity and/or		Reduction of
	of Interest Rate		Amortization		Interest Rate		Total
Commercial	$	—	$	14,481	$	1,870	$	16,351
Commercial collateralized by assignment of lease payments	—		—		—		—
Commercial real estate:
Healthcare	—		—		—		—
Industrial	—		—		—		—
Multifamily	—		—		—		—
Retail	—		—		—		—
Office	—		—		—		—
Other	—		—		—		—
Residential real estate	484		256		—		740
Construction real estate	—		—		—		—
Indirect vehicle	—		—		183		183
Home equity	3,220		820		71		4,111
Other consumer	—		—		—		—
Total	$	3,704	$	15,557	$	2,124	$	21,385

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The following table presents the activity in the allowance for credit losses, balance in allowance for credit losses and recorded investment in loans by portfolio segment and based on impairment method as of September 30, 2016 and 2015 (in thousands):

	Commercial			Commercial collateralized  by assignment of lease payments		Commercial real estate		Residential real estate		Construction real estate		Indirect vehicle		Home equity			Other consumer			Unfunded commitments			Total
September 30, 2016
Allowance for credit losses:
Three Months Ended
Beginning balance	$	50,297		$	10,549	$	46,040	$	4,800	$	14,230	$	3,100	$	4,199		$	2,399		$	2,719		$	138,333
Charge-offs	1,341			367		529		290		7		838		376			409			—			4,157
Recoveries	665			3		324		45		50		436		65			86			—			1,674
Provision	(3,894		)	2,944		1,239		1,575		2,033		598		2,309			(407		)	152			6,549
Ending balance	$	45,727		$	13,129	$	47,074	$	6,130	$	16,306	$	3,296	$	6,197		$	1,669		$	2,871		$	142,399
Nine Months Ended
Beginning balance	$	39,316		$	10,434	$	45,475	$	5,734	$	15,113	$	2,418	$	7,374		$	2,276		$	3,368		$	131,508
Charge-offs	2,126			3,288		2,601		1,134		151		2,420		1,233			1,216			—			14,169
Recoveries	1,997			520		2,761		151		94		1,400		576			620			—			8,119
Provision	6,540			5,463		1,439		1,379		1,250		1,898		(520		)	(11		)	(497		)	16,941
Ending balance	$	45,727		$	13,129	$	47,074	$	6,130	$	16,306	$	3,296	$	6,197		$	1,669		$	2,871		$	142,399
Ending allowance balance attributable to loans:
Individually evaluated for impairment	$	5,401		$	3,933	$	363	$	2,394	$	—	$	—	$	3,252		$	—		$	737		$	16,080
Collectively evaluated for impairment	40,161			9,196		46,235		3,736		16,249		3,296		2,945			1,669			2,134			125,621
Acquired and accounted for under ASC 310-30 (1)	165			—		476		—		57		—		—			—			—			698
Total ending allowance balance	$	45,727		$	13,129	$	47,074	$	6,130	$	16,306	$	3,296	$	6,197		$	1,669		$	2,871		$	142,399
Loans:
Individually evaluated for impairment	$	19,284		$	8,054	$	6,530	$	13,268	$	—	$	125	$	27,276		$	—		$	—		$	74,537
Collectively evaluated for impairment	4,366,528			1,865,326		3,788,271		985,559		451,023		522,146		248,012			77,956			—			12,304,821
Acquired and accounted for under ASC 310-30 (1)	22,913			—		41,286		66,698		14,131		—		13,886			2,424			—			161,338
Total ending loans balance	$	4,408,725		$	1,873,380	$	3,836,087	$	1,065,525	$	465,154	$	522,271	$	289,174		$	80,380		$	—		$	12,540,696

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	Commercial		Commercial collateralized  by assignment of lease payments		Commercial real estate			Residential real estate			Construction real estate		Indirect vehicle		Home equity			Other consumer		Unfunded commitments			Total
September 30, 2015
Allowance for credit losses:
Three Months Ended
Beginning balance	$	39,142	$	11,268	$	38,076		$	6,669		$	12,459	$	1,909	$	8,412		$	2,135	$	4,060		$	124,130
Charge-offs	1,657		1,980		170			292			5		581		358			467		—			5,510
Recoveries	456		11		2,402			337			216		334		186			118		—			4,060
Provision	5,044		985		1,216			(868		)	123		512		(1,490		)	484		(648		)	5,358
Ending balance	$	42,985	$	10,284	$	41,524		$	5,846		$	12,793	$	2,174	$	6,750		$	2,270	$	3,412		$	128,038
Nine Months Ended
Beginning balance	$	29,571	$	9,962	$	41,826		$	6,646		$	8,918	$	1,687	$	9,456		$	1,960	$	4,031		$	114,057
Charge-offs	2,283		2,080		2,312			1,189			11		2,082		1,078			1,391		—			12,426
Recoveries	1,514		1,100		6,338			417			253		1,354		447			356		—			11,779
Provision	14,183		1,302		(4,328		)	(28		)	3,633		1,215		(2,075		)	1,345		(619		)	14,628
Ending balance	$	42,985	$	10,284	$	41,524		$	5,846		$	12,793	$	2,174	$	6,750		$	2,270	$	3,412		$	128,038
Ending allowance balance attributable to loans:
Individually evaluated for impairment	$	7,943	$	2,618	$	3,123		$	2,834		$	—	$	8	$	2,478		$	—	$	1,388		$	20,392
Collectively evaluated for impairment	34,731		7,666		36,975			3,012			12,700		2,166		4,272			2,270		2,024			105,816
Acquired and accounted for under ASC 310-30 (1)	311		—		1,426			—			93		—		—			—		—			1,830
Total ending allowance balance	$	42,985	$	10,284	$	41,524		$	5,846		$	12,793	$	2,174	$	6,750		$	2,270	$	3,412		$	128,038
Loans:
Individually evaluated for impairment	$	36,325	$	6,724	$	29,354		$	14,233		$	—	$	131	$	29,520		$	—	$	—		$	116,287
Collectively evaluated for impairment	3,404,307		1,686,816		2,550,655			592,938			255,620		345,600		193,653			87,612		—			9,117,201
Acquired and accounted for under ASC 310-30 (1)	37,189		—		47,803			43,735			12,372		—		11,986			2,608		—			155,693
Total ending loans balance	$	3,477,821	$	1,693,540	$	2,627,812		$	650,906		$	267,992	$	345,731	$	235,159		$	90,220	$	—		$	9,389,181

⁽¹⁾  Loans acquired in business combinations and accounted for under ASC Subtopic 310-30 “Receivables — Loans and Debt Securities Acquired with Deteriorated Credit Quality.”

Purchased loans acquired in a business combination are recorded at estimated fair value on their purchase date without a carryover of the related allowance for loan and lease losses. These acquired loans are segregated into three types: pass rated loans with no discount attributable to credit quality, non-impaired loans with a discount attributable at least in part to credit quality and impaired loans with evidence of significant credit deterioration.  

• Pass rated loans (typically performing loans) are accounted for in accordance with ASC 310-20 "Nonrefundable Fees and Other Costs" as these loans do not have evidence of credit deterioration since origination.

• Non-impaired loans (typically performing substandard loans) are accounted for in accordance with ASC 310-30 if they display at least some level of credit deterioration since origination.

• Impaired loans (typically substandard loans on non-accrual status) are accounted for in accordance with ASC 310-30 as they display significant credit deterioration since origination.

For pass rated loans (non-purchased credit-impaired loans), the difference between the estimated fair value of the loans and the principal outstanding is accreted over the remaining life of the loans.

In accordance with ASC 310-30, for both purchased non-impaired loans and purchased credit-impaired loans, the loans are pooled by loan type and the difference between contractually required payments at acquisition and the cash flows expected to be collected is referred to as the non-accretable difference. Further, any excess of cash flows expected at acquisition over the estimated fair value is referred to as the accretable yield and is recognized into interest income over the remaining life of the loan pools when there is a reasonable expectation about the amount and timing of such cash flows.

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Substantially all of the loans acquired in transactions with the FDIC displayed at least some level of credit deterioration and as such are included as non-impaired and impaired loans as described immediately above.

During the nine months endedSeptember 30, 2016, there was a negative provision for credit losses of $515 thousand and net charge-offs of $864 thousand in relation to purchased loans. There was $698 thousand and $2.1 million in allowance for loan and lease losses related to these purchased loans at September 30, 2016 and December 31, 2015, respectively.  The provision for credit losses and accompanying charge-offs are included in the table above.

Changes in the accretable yield for loans acquired and accounted for under ASC 310-30 were as follows for the three and nine months endedSeptember 30, 2016 and 2015 (in thousands):

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2016			2015			2016			2015
Balance at beginning of period	$	13,160		$	11,456		$	12,596		$	7,434
Purchases	805			—			805			—
Accretion	(2,564		)	(1,794		)	(7,193		)	(5,541		)
Other (1)	2,523			590			7,716			8,359
Balance at end of period	$	13,924		$	10,252		$	13,924		$	10,252

⁽¹⁾  Primarily includes discount transfers from non-accretable discount to accretable discount due to better than expected performance of loan pools acquired and accounted for under ASC 310-30.

In our FDIC-assisted transactions, the fair value of purchased credit-impaired loans, on the acquisition date, was determined based on assigned risk ratings, expected cash flows and the fair value of loan collateral. The fair value of loans that were non-impaired was determined based on estimates of losses on defaults and other market factors. Due to the loss-share agreements with the FDIC, we recorded a receivable (FDIC indemnification asset) from the FDIC equal to the present value of the corresponding reimbursement percentages on the estimated losses embedded in the loan portfolio.

When cash flow estimates are adjusted downward for a particular loan pool, the FDIC indemnification asset is increased. An allowance for loan and lease losses is established for the impairment of the loans. A provision for credit losses is recognized for the difference between the increase in the FDIC indemnification asset and the decrease in cash flows.

When cash flow estimates are adjusted upward for a particular loan pool, the FDIC indemnification asset is decreased. The difference between the decrease in the FDIC indemnification asset and the increase in cash flows is accreted over the estimated life of the loan pool.

When cash flow estimates are adjusted downward for covered foreclosed real estate, the FDIC indemnification asset is increased. A charge is recognized for the difference between the increase in the FDIC indemnification asset and the decrease in cash flows.

When cash flow estimates are adjusted upward for covered foreclosed real estate, the FDIC indemnification asset is decreased. Any write-down after the transfer to covered foreclosed real estate is reversed.

In both scenarios, the clawback liability (the amount the FDIC requires the Company to pay back if certain thresholds are met) will increase or decrease accordingly.

For other loans acquired through business combinations, the fair value of purchased credit-impaired loans, on the acquisition date, was determined based on assigned risk ratings, expected cash flows and the fair value of loan collateral. The fair value of loans that were non-impaired was determined based on estimates of losses on defaults and other market factors.

30

The carrying amount of loans acquired through a business combination by loan pool type are as follows (in thousands):

September 30, 2016	Purchased Credit-Impaired Loans		Purchased Non-Credit-Impaired Loans		Total
Covered loans:
Consumer related	$	18,619	$	—	$	18,619
Non-covered loans:
Commercial loans	22,913		972,065		994,978
Commercial loans collateralized by assignment of lease payments	—		72,193		72,193
Commercial real estate	41,286		1,412,677		1,453,963
Construction real estate	14,131		38,568		52,699
Consumer related	64,389		403,608		467,997
Total non-covered loans	142,719		2,899,111		3,041,830
Total acquired	$	161,338	$	2,899,111	$	3,060,449

Effective April 1, 2014, the losses on commercial related loans (commercial, commercial real estate and construction real estate) acquired in connection with the Heritage Community Bank ("Heritage") FDIC-assisted transaction ceased being covered under the loss-share agreement for that transaction. The carrying amount of those loans was $1.9 million as of September 30, 2016. Any recoveries, net of expenses, received on commercial related loans on which losses were incurred prior to April 1, 2014 will continue to be covered (and any such net recoveries must be shared with the FDIC in accordance with the loss-share agreement) through March 31, 2017. The losses on consumer related loans acquired in connection with the Heritage FDIC-assisted transaction will continue to be covered under the loss-share agreement through March 31, 2019.

The losses on commercial related loans acquired in connection with the Benchmark Bank ("Benchmark") FDIC-assisted transaction ceased to be covered under the loss-share agreement for that transaction effective January 1, 2015. The carrying amount of those loans was $1.7 million as of September 30, 2016. Any recoveries, net of expenses, received on commercial related loans on which losses were incurred prior to January 1, 2015 will continue to be covered (and any such net recoveries must be shared with the FDIC in accordance with the loss-share agreements) through December 31, 2017. The losses on consumer related loans acquired in connection with the Benchmark FDIC-assisted transaction will continue to be covered under the loss-share agreements through December 31, 2019.

Effective July 1, 2015, the losses on commercial related loans acquired in connection with Broadway Bank ("Broadway") and New Century Bank ("New Century") FDIC-assisted transactions ceased to be covered under the loss-share agreements for those transactions. The carrying amount of those loans was $8.2 million as of September 30, 2016. Any recoveries, net of expenses, received on commercial related loans on which losses were incurred prior to July 1, 2015 will continue to be covered (and any such net recoveries must be shared with the FDIC in accordance with the loss-share agreements) through June 30, 2018. The losses on consumer related loans acquired in connection with the Broadway and New Century FDIC-assisted transactions will continue to be covered under the loss-share agreement through June 30, 2020.

Consumer related purchased credit-impaired loans also included re-purchase transactions with GNMA of $60.6 million as of September 30, 2016. 

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Note 7.   Goodwill and Intangibles

The excess of the cost of an acquisition over the fair value of the net assets acquired, including core deposit and client relationship intangibles, consists of goodwill. Under ASC Topic 350, goodwill is subject to at least annual assessments for impairment by applying a fair value based test. The Company reviews goodwill to determine potential impairment annually, or more frequently if events and circumstances indicate that goodwill might be impaired, by comparing the carrying value of the reporting units with the fair value of the reporting units.

The Company's annual assessment date is as of December 31. Goodwill is tested for impairment at the reporting unit level. The Company has three reporting units: Banking, Leasing and Mortgage Banking. No impairment losses were recognized during the nine months endedSeptember 30, 2016 or 2015. The carrying amount of goodwill was $993.8 million and $725.1 million at September 30, 2016 and December 31, 2015, respectively.

The following table presents the changes in the carrying amount of goodwill for the nine months endedSeptember 30, 2016 (in thousands):

	Banking		Leasing		Mortgage Banking		Total
Balance at beginning of period	$	684,430	$	40,640	$	—	$	725,070
Goodwill from business combinations (1)	268,729		—		—		268,729
Balance at end of period	$	953,159	$	40,640	$	—	$	993,799

⁽¹⁾  Due to the American Chartered merger and adjustments recognized for the MSA acquisition.

The Company has other intangible assets consisting of core deposit and client relationship intangibles that had a remaining weighted average amortization period of approximately thirteen years as of September 30, 2016.

The following table presents the changes during the nine months endedSeptember 30, 2016 in the carrying amount of core deposit and client relationship intangibles, and the gross carrying amount, accumulated amortization, and net book value as of September 30, 2016 (in thousands):

	September 30, 2016
Balance at beginning of period	$	44,812
Amortization expense	(4,917		)
Other intangibles from acquisition	25,500
Balance at end of period	$	65,395
Gross carrying amount	$	118,792
Accumulated amortization	(53,397		)
Net book value	$	65,395

The following presents the estimated future amortization expense of other intangible assets (in thousands):

Year ending December 31,	Amount
2016	$	2,390
2017	8,198
2018	7,456
2019	5,677
2020	5,026
Thereafter	36,648
	$	65,395

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Note 8. Deposits

The composition of deposits was as follows as of September 30, 2016 and December 31, 2015 (in thousands):

	September 30,		December 31,
	2016		2015
Demand deposit accounts, non-interest bearing	$	6,410,334	$	4,627,184
NOW, money market and interest bearing deposits	4,660,407		4,144,633
Savings accounts	1,147,900		974,555
Certificates of deposit, $250,000 or more	1,121,599		877,352
Other certificates of deposit	939,026		881,491
Total	$	14,279,266	$	11,505,215

Certificates of deposit of $250,000 or more included $759.3 million and $500.2 million of brokered deposits at September 30, 2016 and December 31, 2015, respectively.  Brokered deposits typically consist of smaller individual time certificates that have the same liquidity characteristics and yields consistent with time certificates of $250,000 or more.

Note 9. Short-Term Borrowings

Short-term borrowings were as follows as of September 30, 2016 and December 31, 2015 (dollars in thousands):

	September 30, 2016				December 31, 2015
	Weighted Average Interest Rate		Amount		Weighted Average Interest Rate		Amount
Customer repurchase agreements	0.21	%	$	256,569	0.20	%	$	201,207
Federal Home Loan Bank advances	0.38		1,200,000		0.17		775,000
Federal funds purchased	0.60		39,750		0.09		4,530
Line of credit	—		—		2.18		25,000
Total	0.36	%	$	1,496,319	0.23	%	$	1,005,737

Securities sold under agreements to repurchase are agreements in which the Company acquires funds by selling assets to another party under a simultaneous agreement to repurchase the same assets at a specified price and date.  The Company enters into repurchase agreements and also offers a demand deposit account product to customers that sweeps their balances in excess of an agreed upon target amount into overnight repurchase agreements.  All securities sold under agreements to repurchase are recorded on the face of the balance sheet. The Company pledges mortgage-backed securities as collateral for the repurchase agreements and may be required to provide additional collateral based on the fair value of those securities.

The Company had Federal Home Loan Bank fixed rate advances with a maturity date less than one year of $1.2 billion and $775.0 million at September 30, 2016 and December 31, 2015, respectively. At September 30, 2016, the interest rate on the advances outstanding on that date had rates ranging from 0.24% to 0.40% with maturities from October 3, 2016 to June 23, 2017. The Company has investment securities available for sale and loans pledged as collateral on this FHLB advance. See Note 5. Investment Securities and Note 6. Loans of the notes to the consolidated financial statements.

On December 18, 2015, the Company entered into a $35.0 million unsecured line of credit at the holding company level with a correspondent bank. Interest is payable at a rate of one month LIBOR + 1.75%. Nothing was outstanding as of September 30, 2016, and $25.0 million was outstanding as of December 31, 2015. The line of credit is scheduled to mature on June 30, 2017.

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Note 10. Long-Term Borrowings

The Company had Federal Home Loan Bank advances with remaining contractual maturities greater than one year of $230.1 million at September 30, 2016 and $305.2 million at December 31, 2015. As of September 30, 2016, the advances had fixed terms with effective interest rates, net of discounts, ranging from 0.30% to 5.87% and maturities ranging from December 2017 to April 2035. The Company has investment securities available for sale and loans pledged as collateral on these FHLB advances. See Note 5. Investment Securities and Note 6. Loans of the notes to the consolidated financial statements.

The Company had notes payable to banks totaling $66.5 million and $55.0 million at September 30, 2016 and December 31, 2015, respectively, which as of September 30, 2016, were accruing interest at rates ranging from 2.46% to 7.40%, with a weighted average rate of 4.22%.  Lease investments includes equipment with an amortized cost of $79.0 million and $65.8 million at September 30, 2016 and December 31, 2015, respectively, that is pledged as collateral on these notes.

On August 24, 2016, the Company assumed a $16.0 million unsecured term loan at the holding company level with a correspondent bank through the American Chartered merger. Interest is payable at a rate of one month LIBOR + 1.75% and matures on June 30, 2020. Principal payments of $1.0 million are due quarterly until maturity. As of September 30, 2016, $15.0 million was outstanding.

The Company had a $40.0 million10-year structured repurchase agreement as of December 31, 2015, which had a fixed interest rate of 4.75% and matured in March 2016.

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Note 11. Junior Subordinated Notes Issued to Capital Trusts

The Company has established statutory trusts for the sole purpose of issuing trust preferred securities and related trust common securities.  The proceeds from such issuances were used by the trusts to purchase junior subordinated notes of the Company, which are the sole assets of each trust.  Concurrently with the issuance of the trust preferred securities, the Company issued guarantees for the benefit of the holders of the trust preferred securities.  The Company’s outstanding trust preferred securities qualify, and are treated by the Company, as Tier 2 regulatory capital. Prior to the completion of the American Chartered merger, the trust preferred securities qualified, and were treated by the Company, as Tier 1 regulatory capital.  The Company owns all of the common securities of each trust.  The trust preferred securities issued by each trust rank equally with the common securities in right of payment, except that if an event of default under the indenture governing the notes has occurred and is continuing, the preferred securities will rank senior to the common securities in right of payment.

The table below summarizes the outstanding junior subordinated notes and the related trust preferred securities issued by each trust as of September 30, 2016 (in thousands):

	Coal City Capital Trust I		MB Financial Capital Trust II		MB Financial Capital Trust III		MB Financial Capital Trust IV
Junior Subordinated Notes:
Principal balance	$	25,774	$	36,083	$	10,310	$	20,619
Annual interest rate	3-mo LIBOR + 1.80%		3-mo LIBOR + 1.40%		3-mo LIBOR + 1.50%		3-mo LIBOR + 1.52%
Stated maturity date	September 1, 2028		September 15, 2035		September 23, 2036		September 15, 2036
Call date	September 1, 2008		December 15, 2010		September 23, 2011		September 15, 2011
Trust Preferred Securities:
Face Value	$	25,000	$	35,000	$	10,000	$	20,000
Annual distribution rate	3-mo LIBOR + 1.80%		3-mo LIBOR + 1.40%		3-mo LIBOR + 1.50%		3-mo LIBOR + 1.52%
Issuance date	July 1998		August 2005		July 2006		August 2006
Distribution dates (1)	Quarterly		Quarterly		Quarterly		Quarterly

	MB Financial Capital Trust V		MB Financial Capital Trust VI		FOBB Statutory Trust III (2)		TAYC Capital Trust II (3)
Junior Subordinated Notes:
Principal balance	$	30,928	$	23,196	$	5,155	$	41,238
Annual interest rate	3-mo LIBOR + 1.30%		3-mo LIBOR + 1.30%		3-mo LIBOR + 2.80%		3-mo LIBOR + 2.68%
Stated maturity date	December 15, 2037		October 30, 2037		January 23, 2034		June 17, 2034
Call date	December 15, 2012		October 30, 2012		January 23, 2009		June 17, 2009
Trust Preferred Securities:
Face Value	$	30,000	$	22,500	$	5,000	$	40,000
Annual distribution rate	3-mo LIBOR + 1.30%		3-mo LIBOR + 1.30%		3-mo LIBOR + 2.80%		3-mo LIBOR + 2.68%
Issuance date	September 2007		October 2007		December 2003		June 2004
Distribution dates (1)	Quarterly		Quarterly		Quarterly		Quarterly

	American Chartered Statutory Trust I (4)		American Chartered Statutory Trust II (4)
Junior Subordinated Notes:
Principal balance	$	20,619	$	10,464
Annual interest rate	3-mo LIBOR + 3.60%		3-mo LIBOR + 2.75%
Stated maturity date	December 18, 2031		October 7, 2034
Call date	December 18, 2006		October 7, 2009
Trust Preferred Securities:
Face Value	$	20,000	$	10,000
Annual distribution rate	3-mo LIBOR + 3.60%		3-mo LIBOR + 2.75%
Issuance date	November 2001		August 2004
Distribution dates (1)	Quarterly		Quarterly

⁽¹⁾  All distributions are cumulative and paid in cash.

⁽²⁾  FOBB Statutory Trust III was established by First Oak Brook Bancshares, Inc. (“FOBB”) prior to the Company's acquisition of FOBB in 2006, and the junior subordinated notes issued by FOBB to FOBB Statutory Trust III were assumed by the Company upon completion of the acquisition.

35

⁽³⁾  TAYC Capital Trust II was established by Taylor Capital Group, Inc. (“Taylor Capital”) prior to the Company's acquisition of Taylor Capital in 2014, and the junior subordinated notes issued by Taylor Capital to TAYC Capital Trust II were assumed by the Company upon completion of the acquisition. Principal balance and face value amounts associated with TAYC Capital Trust II do not include purchase accounting adjustments to such amounts, which in each case resulted in a discount of $6.8 million.

⁽⁴⁾  American Chartered Statutory Trust I and American Chartered Statutory Trust II were established by American Chartered prior to the Company's acquisition of American Chartered in August 2016, and the junior subordinated notes issued by American Chartered to American Chartered Statutory Trust I and American Chartered Statutory Trust II were assumed by the Company upon completion of the acquisition. Principal balance and face value amounts associated with American Chartered Statutory Trust I and American Chartered Statutory Trust II do not include purchase accounting adjustments to such amounts, which in each case resulted in a discount of $8.0 million.

The trust preferred securities are subject to mandatory redemption, in whole or in part, upon repayment of the junior subordinated notes at the stated maturity date or upon redemption.  Each trust’s ability to pay amounts due on the trust preferred securities is solely dependent upon the Company making payment on the related junior subordinated notes.  The Company’s obligation under the junior subordinated notes and other relevant trust agreements, in aggregate, constitute a full and unconditional guarantee by the Company of each trust’s obligations under the trust preferred securities issued by each trust.  The Company has the right to defer payment of interest on the notes and, therefore, distributions on the trust preferred securities, for up to five years, but not beyond the stated maturity date in the table above.  During any such deferral period, the Company may not pay cash dividends on its common or preferred stock and generally may not repurchase its common or preferred stock.

Note 12. Commitments and Contingencies

Commitments: The Company is a party to credit-related financial instruments with off-balance-sheet risk in the normal course of business to meet the financing needs of its customers.  These financial instruments include commitments to extend credit, standby letters of credit and commercial letters of credit.  Such commitments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the consolidated balance sheets.

The Company’s exposure to credit loss is represented by the contractual amount of these commitments.  The Company follows the same credit policies in making commitments as it does for on-balance-sheet instruments.

At September 30, 2016 and December 31, 2015, the following financial instruments were outstanding, the contractual amounts of which represent off-balance sheet credit risk (in thousands):

	Contractual Amount
	September 30, 2016		December 31, 2015
Commitments to extend credit:
Home equity lines	$	243,331	$	187,478
Other commitments	3,596,246		3,049,152
Letters of credit:
Standby	172,737		137,945
Commercial	5,211		1,108

Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract.  Commitments generally have fixed expiration dates or other termination clauses and may require a payment of a fee.  The commitments for home equity lines of credit may expire without being drawn upon.  Therefore, the total commitment amounts do not necessarily represent future cash requirements.  The amount of collateral obtained, if it is deemed necessary by the Company, is based on management’s credit evaluation of the customer.

The Company, in the normal course of its business, regularly offers standby and commercial letters of credit to its bank customers.  Standby and commercial letters of credit are a conditional but irrevocable form of guarantee.  Under letters of credit, the Company typically guarantees payment to a third party beneficiary upon the default of payment or nonperformance by the bank customer and upon receipt of complying documentation from that beneficiary.

Both standby and commercial letters of credit may be issued for any length of time, but normally do not exceed a period of five years.  These letters of credit may also be extended or amended from time to time depending on the bank customer’s needs.  As of September 30, 2016, the maximum remaining term for any standby letters of credit was September 30, 2030.  A fee is charged to the bank customer and is recognized as income over the life of the letter of credit, unless considered non-rebatable under the terms of a letter of credit application.

36

At September 30, 2016, the aggregate contractual amount of these letters of credit, which represents the maximum potential amount of future payments that the Company would be obligated to pay, increased$38.9 million to $177.9 million from $139.1 million at December 31, 2015.  Of the $177.9 million in commitments outstanding at September 30, 2016, approximately $121.0 million of the letters of credit have been issued or renewed since December 31, 2015.

Letters of credit issued on behalf of bank customers may be done on either a secured or unsecured basis.  If a letter credit is secured, the collateral can take various forms including bank accounts, investments, fixed assets, inventory, accounts receivable or real estate.  The Company takes the same care in making credit decisions and obtaining collateral when it issues letters of credit on behalf of its customers as it does when making other types of loans.

As of September 30, 2016, the Company had approximately $7.1 million in capital expenditure commitments outstanding which relate to various projects to renovate the corporate office space and branches.

Concentrations of credit risk:  The majority of the loans, commitments to extend credit and standby letters of credit have been granted to customers in the Company’s market area.  As of September 30, 2016, approximately 21% of our investments in securities issued by states and political subdivisions were within the state of Illinois.  We did not hold any direct exposure to the state of Illinois as of September 30, 2016. Our commitments to extend credit are primarily related to commercial credits.  Standby letters of credit are granted primarily to commercial borrowers. Our asset-based loans are made to borrowers located throughout the United States. Lease banking provides banking services to lessors located throughout the United States. Our leasing subsidiaries originate leases to companies located throughout the United States. In addition, our mortgage segment and indirect vehicle lenders originate loans to borrowers located throughout the United States.

Contingencies: In the normal course of business, the Company is involved in various legal proceedings.  In the opinion of management, any liability resulting from pending proceedings would not be expected to have a material adverse effect on the Company’s consolidated financial statements.

Note 13. Fair Value Measurements

ASC Topic 820 defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. A fair value measurement assumes that the transaction to sell the asset or transfer the liability occurs in the principal market for the asset or liability or, in the absence of a principal market, the most advantageous market for the asset or liability. The price in the principal (or most advantageous) market used to measure the fair value of the asset or liability is not adjusted for transaction costs. An orderly transaction is a transaction that assumes exposure to the market for a period prior to the measurement date to allow for marketing activities that are usual and customary for transactions involving such assets and liabilities; it is not a forced transaction. Market participants are buyers and sellers in the principal market that are (i) independent, (ii) knowledgeable, (iii) able to transact and (iv) willing to transact.

ASC Topic 820 requires the use of valuation techniques that are consistent with the market approach, the income approach and/or the cost approach. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets and liabilities. The income approach uses valuation techniques to convert expected future amounts, such as cash flows or earnings, to a single present value amount on a discounted basis. The cost approach is based on the amount that currently would be required to replace the service capacity of an asset (replacement cost). Valuation techniques should be consistently applied. Inputs to valuation techniques refer to the assumptions that market participants would use in pricing the asset or liability. Inputs may be observable, meaning those that reflect the assumptions market participants would use in pricing the asset or liability developed based on market data obtained from independent sources, or unobservable, meaning those that reflect the reporting entity's own assumptions about the assumptions market participants would use in pricing the asset or liability developed based on the best information available in the circumstances. In that regard, ASC Topic 820 establishes a fair value hierarchy for valuation inputs that gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. The fair value hierarchy is as follows:

Level 1: Quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date.

Level 2: Significant other observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data.

Level 3: Significant unobservable inputs that reflect a reporting entity's own assumptions about the assumptions that market participants would use in pricing an asset or liability.

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A description of the valuation methodologies used for instruments measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy, is set forth below.

In general, fair value is based upon quoted market prices, where available. If such quoted market prices are not available, fair value is based upon internally developed models that primarily use, as inputs, observable market-based parameters. Valuation adjustments may be made to ensure that financial instruments are recorded at fair value. These adjustments may include amounts to reflect counterparty credit quality, the Company's creditworthiness, among other things, as well as unobservable parameters. Any such valuation adjustments are applied consistently over time. Our valuation methodologies may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. While management believes the Company's valuation methodologies are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date. Transfers between levels of the fair value hierarchy are recognized on the actual date of the event or circumstances that caused the transfer, which generally coincides with the Company's monthly and/or quarterly valuation process.

Financial Instruments Recorded at Fair Value on a Recurring Basis

Securities Available for Sale. The fair values of securities available for sale are determined by quoted prices in active markets, when available, and classified as Level 1. If quoted market prices are not available, the fair value is determined by matrix pricing, which is a mathematical technique widely used in the industry to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities' relationship to other benchmark quoted securities and classified as Level 2. In cases where significant credit valuation adjustments are incorporated into the estimation of fair value, reported amounts are classified as Level 3.

Loans Held for Sale. Residential real estate loans originated and held for sale in the secondary market are carried at fair value.The fair value of loans held for sale is determined using quoted secondary market prices and classified as Level 2.

Loans. The Company has elected to record certain mortgage loans at fair value. The fair value of these loans is determined using quoted secondary market prices and classified as Level 2.

Mortgage Servicing Rights. The Company has elected to record its mortgage servicing rights at fair value. Mortgage servicing rights do not trade in an active market with readily observable prices. Accordingly, the Company determines the fair value of mortgage servicing rights by estimating the fair value of the future cash flows associated with the mortgage loans being serviced. Key economic assumptions used in measuring the fair value of mortgage servicing rights include, but are not limited to, prepayment speeds, discount rates, delinquencies and cost to service. The assumptions used in the model are validated on a regular basis. The fair value is validated on a quarterly basis with an independent third party. Material discrepancies between the internal model and the third party validation are investigated and resolved by an internal committee. Due to the nature of the valuation inputs, mortgage servicing rights are classified in Level 3 of the fair value hierarchy.

Assets Held in Trust for Deferred Compensation and Associated Liabilities.Assets held in trust for deferred compensation are recorded at fair value and included in “Other Assets” on the consolidated balance sheets. These assets are invested in mutual funds and classified as Level 1. Deferred compensation liabilities, also classified as Level 1, are carried at the fair value of the obligation to the employee, which corresponds to the fair value of the invested assets.

Derivatives. Currently, we use interest rate swaps to manage our interest rate risk. The valuation of these instruments is determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative and classified as Level 2. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including LIBOR rate curves. We also obtain dealer quotations for these derivatives for comparative purposes to assess the reasonableness of the model valuations. In addition, we use forward commitments to buy to-be-announced mortgage securities for which we do not intend to take delivery of the security and will enter into an offsetting position before physical delivery to lessen the price volatility of the mortgage servicing rights asset. Dealer quotations are used for these derivatives and are classified as Level 1. We also offer other derivatives, including foreign currency forward contracts and interest rate lock commitments, to our customers and offset our exposure from such contracts by purchasing other financial contracts, which are valued using market consensus prices. For certain interest rate lock commitments, which are classified as Level 3, the Company uses an external valuation model to estimate the fair value of the commitments. This model relies on unobservable, internally developed inputs that reflect management’s assumptions and specific information about each borrower transaction.

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The following table summarizes financial assets and financial liabilities measured at fair value on a recurring basis as of September 30, 2016 and December 31, 2015, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value (in thousands):

	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
September 30, 2016
Financial assets
Securities available for sale:
U.S Government sponsored agencies and enterprises	$	53,968	$	—	$	53,968	$	—
States and political subdivisions	410,737		—		410,320		417
Residential mortgage-backed securities	1,076,337		—		1,076,132		205
Commercial mortgage-backed securities	96,993		—		96,993		—
Corporate bonds	210,193		—		210,193		—
Equity securities	11,128		11,128		—		—
Loans held for sale	899,412		—		899,412		—
Loans	19,121		—		19,121		—
Mortgage servicing rights	154,730		—		—		154,730
Assets held in trust for deferred compensation	18,937		18,937		—		—
Derivative financial instruments	112,208		1,347		98,300		12,561
Financial liabilities
Other liabilities (1)	18,937		18,937		—		—
Derivative financial instruments	70,330		6,001		64,329		—
December 31, 2015
Financial assets
Securities available for sale:
U.S. Government sponsored agencies and enterprises	$	64,611	$	—	$	64,611	$	—
States and political subdivisions	396,367		—		395,950		417
Residential mortgage-backed securities	763,549		—		763,193		356
Commercial mortgage-backed securities	130,107		—		130,107		—
Corporate bonds	219,628		—		219,628		—
Equity securities	10,761		10,761		—		—
Loans held for sale	744,727		—		744,727		—
Loans	25,869		—		25,869		—
Mortgage servicing rights	168,162		—		—		168,162
Assets held in trust for deferred compensation	16,820		16,820		—		—
Derivative financial instruments	42,846		5,118		33,906		3,822
Financial liabilities
Other liabilities (1)	16,333		16,333		—		—
Derivative financial instruments	36,974		6,050		30,924		—

⁽¹⁾  Liabilities associated with assets held in trust for deferred compensation

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The following table presents additional information about the unobservable inputs used in the fair value measurement of financial assets measured on a recurring basis that were categorized within the Level 3 of the fair value hierarchy:

	Fair Value at
	September 30, 2016		Valuation Technique	Unobservable Input	Range
	(in thousands)
States and political subdivisions	$	417	Discounted cash flows	Credit assumption	50% Loss
Residential mortgage-backed securities	205		Discounted cash flows	Constant pre-payment rates (CPR)	1% - 3%
Mortgage servicing rights	154,730		Discounted cash flows	CPR	12.3% - 16.1%
				Discount rate	9.50 - 12.00
				Maturity (months)	327 - 357
				Delinquencies	0.51 - 3.86
				Costs to service	$ 66 - $ 160
				Costs to service - delinquent	$ 150 - $ 1,000
Derivative financial instruments (mortgage	12,561		Sales cash flows	Expected closing ratio	70% - 95%
interest rate lock commitments)				Expected delivery price	98.58 bps - 109.77 bps

The significant unobservable inputs used in the fair value measurement of the Company’s mortgage servicing rights include prepayment speeds, discount rates, maturities, delinquencies and cost to service. Significant increases in prepayment speeds, discount rates, delinquencies or cost to service would result in a significantly lower fair value measurement. Conversely, significant decreases in prepayment speeds, discount rates, delinquencies or costs to service would result in a significantly higher fair value measurement. With the exception of changes in delinquencies, which can change the cost to service, the unobservable inputs move independently of each other.

Key economic assumptions used in the measuring of the fair value of the mortgage servicing rights and the sensitivity of the fair value to immediate adverse changes in those assumptions at September 30, 2016 are presented in the following table. This table does not take into account the derivatives used to economically hedge the mortgage servicing rights.

(dollars in thousands, except for weighted average cost to service)	September 30, 2016
Weighted average CPR	15.30		%
Impact on fair value of 10% adverse change	$	(7,917	)
Impact on fair value of 20% adverse change	(15,144		)
Weighted average discount rate	9.78		%
Impact on fair value of 10% adverse change	$	(5,045	)
Impact on fair value of 20% adverse change	(9,769		)
Weighted average delinquency rate	1.80		%
Impact on fair value of 10% adverse change	$	(1,329	)
Impact on fair value of 20% adverse change	(2,428		)
Weighted average costs to service	$	88
Impact on fair value of 10% adverse change	(2,988		)
Impact on fair value of 20% adverse change	(5,976		)

The Company did not have any transfers between Level 1 and Level 2 of the fair value hierarchy during the nine months endedSeptember 30, 2016. The Company's policy for determining transfers between levels occurs at the end of the reporting period when circumstances in the underlying valuation criteria change and result in transfer between levels.

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The following table presents additional information about financial assets measured at fair value on a recurring basis for which the Company used significant unobservable inputs (Level 3):

	Nine Months Ended
	September 30,
	2016			2015			2016			2015			2016		2015
(in thousands)	Investment Securities						Mortgage Servicing Rights						Derivatives
Balance, beginning of period	$	773		$	973		$	168,162		$	235,402		$	3,822	$	5,074
Purchases	—			—			3,423			785			—		—
Originations	—			—			43,039			55,583			—		—
Included in earnings	—			—			(59,894		)	(40,568		)	8,739		3,088
Principal payments	(151		)	(115		)	—			—			—		—
Sales	—			—			—			(103,105		)	—		—
Balance, ending of period	$	622		$	858		$	154,730		$	148,097		$	12,561	$	8,162

Financial Instruments Recorded at Fair Value on a Nonrecurring Basis

The Company may be required, from time to time, to measure certain financial assets and financial liabilities at fair value on a nonrecurring basis in accordance with U.S. GAAP. These include assets that are measured at the lower of cost or fair value that were recognized at fair value below cost at the end of the period.

Impaired Loans.Loans for which it is probable that payment of interest and principal will not be made in accordance with the contractual terms of the loan agreement are considered impaired. Once a loan is identified as individually impaired, management measures impairment in accordance with ASC Topic 310. The fair value of impaired loans is estimated using one of several methods, including collateral value, market value of similar debt, enterprise value, liquidation value and discounted cash flows. Those impaired loans not requiring an allowance represent loans for which the fair value of the expected repayments or collateral exceed the recorded investments in such loans. In accordance with ASC Topic 820, impaired loans where an allowance is established based on the fair value of collateral require classification in the fair value hierarchy. Collateral values are estimated using Level 3 inputs based on customized discounting criteria. For a majority of impaired real estate loans where an allowance is established based on the fair value of collateral (100% at September 30, 2016), the Company obtains a current external appraisal. Other valuation techniques are used as well, including internal valuations, comparable property analysis and contractual sales information.

Non-Financial Assets and Non-Financial Liabilities Recorded at Fair Value

The Company has no non-financial assets or non-financial liabilities measured at fair value on a recurring basis. Certain non-financial assets and non-financial liabilities measured at fair value on a non-recurring basis include foreclosed assets and non-financial long-lived assets.

Other Real Estate and Repossessed Vehicles Owned (Foreclosed Assets). Foreclosed assets, upon initial recognition, are measured and reported at fair value through a charge-off to the allowance for loan and lease losses based upon the fair value of the foreclosed asset. The fair value of foreclosed assets, upon initial recognition, are estimated using Level 3 inputs based on customized discounting criteria.

Non-Financial Long-Lived Assets.  Non-financial long-lived assets, when determined to be impaired, are measured and reported at fair value using Level 3 inputs based on customized discounting criteria.

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Assets measured at fair value on a nonrecurring basis as of September 30, 2016 and December 31, 2015 are included in the table below (in thousands):

	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
September 30, 2016
Financial assets:
Impaired loans	$	54,740	$	—	$	—	$	54,740
Non-financial assets:
Foreclosed assets	38,735		—		—		38,735
December 31, 2015
Financial assets:
Impaired loans	$	76,203	$	—	$	—	$	76,203
Non-financial assets:
Foreclosed assets	42,351		—		—		42,351

The following table presents additional information about the unobservable inputs used in the fair value measurement of financial assets measured on a nonrecurring basis that were categorized within the Level 3 of the fair value hierarchy:

	Fair Value at		Valuation	Unobservable
	September 30, 2016		Technique	Input	Range
	(in thousands)
Impaired loans	$	54,740	Appraisal of collateral	Appraisal adjustments	5% - 10%
Foreclosed assets	38,735		Appraisal of collateral	Appraisal adjustments	5% - 10%

ASC Topic 825 requires disclosure of the fair value of financial assets and financial liabilities, including those financial assets and financial liabilities that are not measured and reported at fair value on a recurring basis or non-recurring basis. The methodologies for estimating the fair value of financial assets and financial liabilities that are measured at fair value on a recurring or non-recurring basis are discussed above. The estimated fair value approximates carrying value for cash and cash equivalents, accrued interest and the cash surrender value of life insurance policies.

The following methods and assumptions were used by the Company in estimating the fair values of its other financial instruments:

Cash and due from banks, interest earning deposits with banks and federal funds sold: The carrying amounts reported in the balance sheet approximate fair value.

Securities held to maturity: The fair values of securities held to maturity are determined by quoted prices in active markets, when available, and classified as Level 1. If quoted market prices are not available, the fair value is determined by a matrix pricing, which is a mathematical technique widely used in the industry to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities' relationship to other benchmark quoted securities and classified as Level 2. In cases where significant credit valuation adjustments are incorporated into the estimation of fair value, reported amounts are classified as Level 3.

Non-marketable securities - FHLB and FRB Stock: The carrying amounts reported in the balance sheet approximate fair value.

Loans: The fair values for loans are estimated using discounted cash flow analyses, using the corporate bond curve adjusted for liquidity for commercial loans and the swap curve adjusted for liquidity for retail loans. The Company has elected to record certain mortgage loans at fair value. The fair value of these loans is determined using quoted secondary market prices and classified as Level 2.

Non-interest bearing deposits: The fair values disclosed are equal to their balance sheet carrying amounts, which represent the amount payable on demand.

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Interest bearing deposits: The fair values disclosed for deposits with no defined maturities are equal to their carrying amounts, which represent the amounts payable on demand. Fair values for certificates of deposit are estimated using a discounted cash flow calculation that applies the Company's current incremental borrowing rates for similar terms.

Short-term borrowings: The carrying amounts of federal funds purchased, borrowings under repurchase agreements and other short-term borrowings with maturities of 90 days or less approximate their fair values.  The fair value of short-term borrowings greater than 90 days is based on the discounted value of contractual cash flows.

Long-term borrowings: The fair values of the Company's long-term borrowings (other than deposits) are estimated using discounted cash flow analyses, based on the Company's current incremental borrowing rates for similar types of borrowing arrangements.

Junior subordinated notes issued to capital trusts: The fair values of the Company's junior subordinated notes issued to capital trusts are estimated based on the quoted market prices, when available, of the related trust preferred security instruments, or are estimated based on the quoted market prices of comparable trust preferred securities.

Accrued interest: The carrying amounts of accrued interest receivable and payable approximate their fair values.

Off-balance-sheet instruments: Fair values for the Company’s off-balance-sheet lending commitments (guarantees, letters of credit and commitments to extend credit) are based on fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements.

The estimated fair values of financial instruments are as follows (in thousands):

	September 30, 2016
	Carrying Amount		Estimated Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Financial Assets:
Cash and due from banks	$	351,009	$	351,009	$	351,009	$	—	$	—
Interest earning deposits with banks	125,250		125,250		125,250		—		—
Investment securities available for sale	1,859,356		1,859,356		11,128		1,847,606		622
Investment securities held to maturity	1,115,262		1,175,838		—		1,175,838		—
Non-marketable securities - FHLB and FRB stock	146,209		146,209		—		—		146,209
Loans held for sale	899,412		899,412		—		899,412		—
Loans, net	12,401,168		12,403,330		—		19,121		12,384,209
Accrued interest receivable	58,541		58,541		58,541		—		—
Derivative financial instruments	112,208		112,208		1,347		98,300		12,561
Financial Liabilities:
Non-interest bearing deposits	$	6,410,334	$	6,410,334	$	6,410,334	$	—	$	—
Interest bearing deposits	7,868,932		7,873,233		—		—		7,873,233
Short-term borrowings	1,496,319		1,496,312		—		—		1,496,312
Long-term borrowings	311,645		312,974		—		—		312,974
Junior subordinated notes issued to capital trusts	209,159		144,681		—		—		144,681
Accrued interest payable	4,000		4,000		4,000		—		—
Derivative financial instruments	70,330		70,330		6,001		64,329		—

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	December 31, 2015
	Carrying Amount		Estimated Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Financial Assets:
Cash and due from banks	$	307,869	$	307,869	$	307,869	$	—	$	—
Interest earning deposits with banks	73,572		73,572		73,572		—		—
Investment securities available for sale	1,585,023		1,585,023		10,761		1,573,489		773
Investment securities held to maturity	1,230,810		1,274,767		—		1,274,767		—
Non-marketable securities - FHLB and FRB stock	114,233		114,233		—		—		114,233
Loans held for sale	744,727		744,727		—		744,727		—
Loans, net	9,665,858		9,626,344		—		25,869		9,600,475
Accrued interest receivable	53,457		53,457		53,457		—		—
Derivative financial instruments	42,846		42,846		5,118		33,906		3,822
Financial Liabilities:
Non-interest bearing deposits	$	4,627,184	$	4,627,184	$	4,627,184	$	—	$	—
Interest bearing deposits	6,878,031		6,875,411		—		—		6,875,411
Short-term borrowings	1,005,737		1,005,705		—		—		1,005,705
Long-term borrowings	400,274		401,539		—		—		401,539
Junior subordinated notes issued to capital trusts	186,164		122,696		—		—		122,696
Accrued interest payable	3,186		3,186		3,186		—		—
Derivative financial instruments	36,974		36,974		6,050		30,924		—

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Note 14. Stock Incentive Plans

ASC Topic 718 requires that the grant date fair value of equity awards to employees be recognized as compensation expense over the period during which an employee is required to provide service in exchange for such award.

The following table summarizes the impact of the Company’s share-based payment plans in the financial statements for the periods shown (in thousands):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2016		2015		2016		2015
Total cost of share-based payment plans during the period	$	4,238	$	3,508	$	12,573	$	10,983
Amount of related income tax benefit recognized in income	3,394		1,367		6,649		$	4,288

The Company adopted the Omnibus Incentive Plan (the “Omnibus Plan”) in 1997.  On May 28, 2014, the Company’s stockholders approved the third amendment and restatement of the Omnibus Plan to add 3,100,000 authorized shares for a total of 11,400,000 shares of common stock authorized to be utilized in connection with awards under the Omnibus Plan to directors, officers, and employees of the Company or any of its subsidiaries. The number of shares authorized increased by 2,400,000 to 13,800,000 upon completion of the Taylor Capital merger.  Equity grants under the Omnibus Plan can be in the form of incentive stock options, non-qualified stock options, stock appreciation rights, restricted stock, restricted stock units, performance shares, performance units, and other stock-based awards.  Shares awarded in the form of restricted stock, restricted stock units, performance shares, performance units, or other stock-based awards generally will reduce the shares available under the Omnibus Plan on a 2-for-1 basis. No more than 10% of the total number of authorized shares may be issued with respect to awards granted after May 28, 2014, other than stock appreciation rights, stock options and performance-based awards, which at the date of grant are scheduled to fully vest prior to three years from the date of grant (although such awards may provide scheduled vesting earlier with respect to some of such shares and for acceleration of vesting as provided in the Omnibus Plan).   As of September 30, 2016, there were 3,826,110 shares available for future grants.

Prior to 2014, annual equity-based incentive awards were typically granted to selected officers and employees mid-year. In 2014, these awards began being granted in the first quarter of the year.  Options are granted with an exercise price equal to no less than the market price of the Company’s shares at the date of grant; those option awards generally vest over four years of service and have 10-year contractual terms.  Restricted shares and units typically vest over a two to four year period.  Equity awards may also be granted at other times throughout the year in connection with the recruitment and retention of officers and employees.  Directors currently may elect, in lieu of cash, to receive up to 70% of their fees in stock options with a five year term, which are fully vested on the grant date (provided that the director may not sell the underlying shares for at least six months after the grant date), and up to 100% of their fees in restricted shares, which vest one year after the grant date.

The following table summarizes changes in stock options for the nine months endedSeptember 30, 2016:

	Number of Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (In Years)	Aggregate Intrinsic Value (in thousands)
Options outstanding as of December 31, 2015	2,192,431		$	27.77	4.44
Granted	501,538		28.86
Exercised	(461,405	)	28.98
Expired	(35,791	)	39.91
Forfeited or cancelled	(33,680	)	31.06
Options outstanding as of September 30, 2016	2,163,093		$	27.51	5.26	$	22,903
Options exercisable as of September 30, 2016	1,423,442		$	26.82	3.53	$	16,109

The fair value of each option award is estimated on the date of grant using the Black-Scholes option pricing model based on certain assumptions.  Expected volatility is based on historical volatility and the expectations of future volatility of Company shares.  The risk free interest rate for periods within the contractual term of the option is based on the U.S. Treasury yield curve in effect at the

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time of the grant.  The expected life of options is estimated based on historical employee behavior and represents the period of time that options granted are expected to remain outstanding.

 The following assumptions were used for options granted during the nine months endedSeptember 30, 2016:

	September 30, 2016
Risk-free interest rate	1.44		%
Expected volatility of Company’s stock	28.17		%
Expected dividend yield	2.21		%
Expected life of options	5.6 years
Weighted average fair value per option of options granted during the year	$	6.64

The total intrinsic value of options exercised during the nine months endedSeptember 30, 2016 and 2015 was $3.6 million and $1.3 million, respectively.

The following is a summary of changes in restricted shares and units for the nine months endedSeptember 30, 2016:

	Number of Shares and Units		Weighted Average Grant Date Fair Value
Shares and units outstanding at December 31, 2015	945,506		$	29.92
Granted	482,739		31.19
Vested	(405,633	)	28.37
Forfeited or cancelled	(23,824	)	29.95
Shares and units outstanding at September 30, 2016	998,788		31.17

The total intrinsic value of restricted shares that vested during the nine months endedSeptember 30, 2016 and 2015 was $15.7 million and $11.3 million, respectively.

The Company issued 80,780, 71,560 and 48,569 market-based restricted stock units in 2016, 2015 and 2014, respectively, which entitle recipients to shares of common stock at the end of a three year vesting period. Recipients will earn shares, totaling between 0% and 175% of the number of units issued, based on the Company's total stockholder return relative to a specified peer group of financial institutions over the three year period. The Company issued 56,752 market-based restricted stock units in 2013 that vested in 2016. Recipients earned shares totaling 175% of the number of units issued, based on the Company’s total shareholder return relative to a specified peer group of financial institutions over the three year period. The market-based restricted stock units are included in the preceding table as if the recipients earned shares equal to 100% of the units issued. A Monte Carlo simulation model was used to value the market-based restricted stock units at the time of issuance.

As of September 30, 2016, there was $25.4 million of total unrecognized compensation cost related to nonvested share-based compensation arrangements (including share option and nonvested share awards) granted under the Omnibus Plan.  At September 30, 2016, the weighted-average period over which the unrecognized compensation expense is expected to be recognized was approximately 2.4 years.

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Note 15. Derivative Financial Instruments

The Company offers various derivatives, including interest rate swaps and foreign currency forward contracts, to its qualifying customers which can mitigate our exposure to market risk through the execution of off-setting positions with inter-bank dealer counterparties. This also permits the Company to offer customized risk management solutions to our customers. These customer accommodations and any offsetting financial contracts are treated as non-designated derivative instruments and carried at fair value through an adjustment to the statement of operations.

Interest rate swap and foreign currency forward contracts involve the risk of dealing with counterparties and their ability to meet contractual terms. The net amount payable or receivable under interest rate swaps is accrued as an adjustment to interest income.  The net amount payable as of September 30, 2016 was approximately $1 thousand, and the net amount payable as of December 31, 2015 was approximately $1 thousand.  The Company's credit exposure on interest rate swaps is limited to the Company's net favorable value and interest payments of all swaps to each counterparty. In such cases, collateral is generally required from the counterparties involved if the net value of the swaps exceeds a nominal amount.  At September 30, 2016, the Company’s credit exposure relating to interest rate swaps was approximately $45.8 million, which is secured by the underlying collateral on customer loans. 

The Company also enters into mortgage banking derivatives which are classified as non-designated hedging 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 residential mortgage loans 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 had fair value commercial loan interest rate swaps, to hedge its interest rate risk, with an aggregate notional amount of $119 thousand at September 30, 2016.  For fair value hedges, the changes in fair values of both the hedging derivative and the hedged item were recorded in current earnings as other income.

Interest rate swaps, swaptions and treasury futures are used in order to lessen the price volatility of the mortgage servicing rights asset. The Company also uses forward commitments to buy to-be-announced ("TBA") mortgage securities for which the Company does not intend to take delivery of the security and will enter into an offsetting position before physical delivery to lessen the price volatility of the mortgage servicing rights asset. These derivatives are recorded at their fair value on the consolidated balance sheets in other assets with changes in fair value recorded on the consolidated statements of operations in mortgage banking revenue in non-interest income.

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The Company’s derivative financial instruments are summarized below as of September 30, 2016 and December 31, 2015 (in thousands):

	Asset Derivatives								Liability Derivatives
	September 30, 2016				December 31, 2015				September 30, 2016					December 31, 2015
	Notional		Estimated		Notional		Estimated		Notional		Estimated			Notional		Estimated
	Amount		Fair Value		Amount		Fair Value		Amount		Fair Value			Amount		Fair Value
Derivative instruments designated as hedges of fair value:
Interest rate swap contracts (1)	$	—	$	—	$	—	$	—	$	119	$	(5	)	$	154	$	(9	)
Stand-alone derivative instruments: (2)
Interest rate swap contracts	1,226,157		49,520		1,034,298		27,856		1,226,157		(49,520		)	1,025,186		(27,899		)
Interest rate options contracts	219,409		872		222,585		628		219,409		(872		)	190,622		(585		)
Foreign exchange contracts	49,550		3,231		72,529		3,970		44,474		(3,011		)	63,339		(3,671		)
Spot foreign exchange contracts	742		17		328		5		278		(6		)	132		—
Mortgage related derivatives:
Interest rate swap contracts	1,332,000		44,660		898,000		4,928		185,000		(10,915		)	665,000		(3,723		)
Interest rate swaptions contracts	—		—		—		—		—		—			—		—
Treasury futures contracts	86,500		406		—		—		—		—			—		—
TBA mortgage securities	290,000		856		35,000		33		—		—			—		—
Forward loan sale commitments	85,000		85		503,500		1,604		1,261,500		(6,001		)	475,500		(1,087		)
Interest rate lock commitments	944,918		12,561		622,906		3,822		—		—			—		—
Total stand-alone derivative instruments	4,234,276		112,208		3,389,146		42,846		2,936,818		(70,325		)	2,419,779		(36,965		)
Total	$	4,234,276	$	112,208	$	3,389,146	$	42,846	$	2,936,937	$	(70,330	)	$	2,419,933	$	(36,974	)

⁽¹⁾ Derivative instruments designated to hedge fixed-rate commercial real estate loans.

⁽²⁾ These portfolio swaps are not designated as hedging instruments under ASC Topic 815.

Amounts included in other operating income in the consolidated statements of operations related to derivative financial instruments were as follows (in thousands):

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2016			2015			2016		2015
Derivative instruments designated as hedges of fair value:
Interest rate swap contracts	$	3		$	4		$	3	$	4
Stand-alone derivative instruments:
Interest rate swap contracts	5,296			8,614			5,260		8,623
Interest rate options contracts	(36		)	—			—		—
Foreign exchange contracts	1,362			30			1,362		91
Spot foreign exchange contracts	6			14			6		182
Mortgage related derivatives	(8,118		)	(9,411		)	31,653		(9,408		)
Total stand-alone derivative instruments	(1,490		)	(753		)	38,281		(512		)
Total	$	(1,487	)	$	(749	)	$	38,284	$	(508	)

Methods and assumptions used by the Company in estimating the fair value of its interest rate swaps are discussed in Note 13 to consolidated financial statements.

Certain instruments and transactions subject to an agreement similar to a master netting arrangement are eligible for offset in the consolidated balance sheet. The instruments and transactions would include derivatives, sale and repurchase agreements and reverse sale and repurchase agreements, and securities borrowing and securities lending arrangements. The Company’s derivative transactions with financial institution counterparties are generally executed under International Swaps and Derivative Association (“ISDA”) master agreements which include “right of set-off” provisions. Under these agreements, there is generally a legally

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enforceable right to offset recognized amounts, and there may be an intention to settle such amounts on a net basis. The Company, however, does not generally offset such financial instruments for financial reporting purposes.

Information about the Company's financial instruments that are eligible for offset in the consolidated balance sheet as of September 30, 2016 is summarized below (in thousands):

	Financial Assets						Financial Liabilities
	Gross Amount Recognized		Gross Amount Offset		Net Amount Recognized		Gross Amount Recognized		Gross Amount Offset		Net Amount Recognized
Derivatives:
Interest rate swap contracts, caps and floors	$	652	$	—	$	652	$	50,047	$	—	$	50,047
Foreign exchange contracts	2,850		—		2,850		1,551		—		1,551
Mortgage related derivatives	46,008		—		46,008		16,917		—		16,917
Total derivatives	49,510		—		49,510		68,515		—		68,515
Repurchase agreements	—		—		—		256,569		—		256,569
Total	$	49,510	$	—	$	49,510	$	325,084	$	—	$	325,084

	Financial Assets									Financial Liabilities
	Net Amount Recognized		Financial Instruments			Collateral		Net Amount		Net Amount Recognized		Financial Instruments			Collateral			Net Amount
Derivatives:
Counterparty A	$	35,142	$	(15,868	)	$	—	$	19,274	$	15,868	$	(15,868	)	$	—		$	—
Counterparty B	309		(309		)	—		—		11,098		(309		)	(10,789		)	—
Counterparty C	7,740		(7,740		)	—		—		17,344		(7,740		)	(9,604		)	—
Other counterparties	6,319		(6,296		)	—		23		24,205		(6,296		)	(17,886		)	23
Total derivatives	49,510		(30,213		)	—		19,297		68,515		(30,213		)	(38,279		)	23
Repurchase agreements	—		—			—		—		256,569		—			(256,569		)	—
Total	$	49,510	$	(30,213	)	$	—	$	19,297	$	325,084	$	(30,213	)	$	(294,848	)	$	23

Information about the Company's financial instruments that are eligible for offset in the consolidated balance sheet as of December 31, 2015 is summarized below (in thousands):

	Financial Assets						Financial Liabilities
	Gross Amount Recognized		Gross Amount Offset		Net Amount Recognized		Gross Amount Recognized		Gross Amount Offset		Net Amount Recognized
Derivatives:
Interest rate swap contracts, caps and floors	$	5,698	$	—	$	5,698	$	31,446	$	—	$	31,446
Foreign exchange contracts	2,728		—		2,728		1,805		—		1,805
Mortgage related derivatives	1,636		—		1,636		1,087		—		1,087
Total derivatives	10,062		—		10,062		34,338		—		34,338
Repurchase agreements	—		—		—		201,207		—		201,207
Total	$	10,062	$	—	$	10,062	$	235,545	$	—	$	235,545

	Financial Assets									Financial Liabilities
	Net Amount Recognized		Financial Instruments			Collateral		Net Amount		Net Amount Recognized		Financial Instruments			Collateral			Net Amount
Derivatives:
Counterparty A	$	3,810	$	(3,810	)	$	—	$	—	$	11,137	$	(3,810	)	$	(7,327	)	$	—
Counterparty B	6		(6		)	—		—		7,808		(6		)	(7,802		)	—
Counterparty C	3,477		(3,477		)	—		—		4,963		(3,477		)	(1,486		)	—
Other counterparties	2,769		(2,230		)	—		539		10,430		(2,230		)	(8,034		)	166
Total derivatives	10,062		(9,523		)	—		539		34,338		(9,523		)	(24,649		)	166
Repurchase agreements	—		—			—		—		201,207		—			(201,207		)	—
Total	$	10,062	$	(9,523	)	$	—	$	539	$	235,545	$	(9,523	)	$	(225,856	)	$	166

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Note 16.   Operating Segments

The Company's operations consist of three reportable operating segments: Banking, Leasing and Mortgage Banking. The Company offers different products and services through its three segments. The accounting policies of the segments are generally the same as those of the consolidated company.

The Banking Segment generates its revenues primarily from its lending, deposit gathering and fee business activities. The profitability of this segment's operations depends primarily on its net interest income after provision for credit losses, which is the difference between interest earned on interest earning assets and interest paid on interest bearing liabilities less provision for credit losses.  The provision for credit losses is dependent on changes in the Banking Segment's loan portfolio and management’s assessment of the collectability of the loan portfolio as well as prevailing economic and market conditions.  The Banking Segment is also subject to an extensive system of laws and regulations that are intended primarily for the protection of depositors and other customers, federal deposit insurance funds and the banking system as a whole.  These laws and regulations govern such areas as capital, permissible activities, allowance for loan and lease losses, loans and investments, and rates of interest that can be charged on loans. 

The Leasing Segment generates its revenues through lease originations and related services offered through the Company's leasing subsidiaries, LaSalle Systems Leasing, Inc., Celtic Leasing Corp. and MB Equipment Finance, LLC. The leasing subsidiaries invest directly in equipment that the Company leases (referred to as direct finance, leveraged or operating leases) to "Fortune 1000," middle-market companies and healthcare providers located throughout the United States. The lease portfolio is made up of various kinds of equipment, generally technology related, such as computer systems, satellite equipment, medical equipment and general manufacturing, industrial, construction and transportation equipment. The leasing subsidiaries also specialize in selling third party equipment maintenance contracts to large companies.

The Mortgage Banking Segment originates residential mortgage loans for sale to investors and for the Company's portfolio through its retail and third party originator channels. This segment also services residential mortgage loans for various investors and for loans owned by the Company. The Mortgage Banking Segment is also subject to an extensive system of laws and regulations that are intended primarily for the protection of customers.

Net interest income for the Leasing and Mortgage Banking segments include adjustments based on the Company's internal funds transfer pricing model. Non-interest income for the Leasing Segment includes income on loans originated for the sole purpose of funding equipment purchases related to leases at the Company's lease subsidiaries.

The following tables present summary financial information for the reportable segments (in thousands):

	Banking		Leasing		Mortgage Banking		Consolidated
Three months ended September 30, 2016
Net interest income	$	119,685	$	2,168	$	8,918	$	130,771
Provision for credit losses	4,394		1,964		191		6,549
Non-interest income	40,533		18,759		49,095		108,387
Non-interest expense (1)	117,211		12,604		40,570		170,385
Income tax expense	8,420		2,484		6,901		17,805
Net income	$	30,193	$	3,875	$	10,351	$	44,419
Total assets	$	16,453,379	$	1,126,847	$	1,761,656	$	19,341,882
Three months ended September 30, 2015
Net interest income	$	104,714	$	2,832	$	8,423	$	115,969
Provision for credit losses	4,965		242		151		5,358
Non-interest income	31,572		19,987		30,692		82,251
Non-interest expense (1)	88,276		11,382		34,608		134,266
Income tax expense	12,178		4,398		1,742		18,318
Net income	$	30,867	$	6,797	$	2,614	$	40,278
Total assets	$	12,759,341	$	956,433	$	1,234,327	$	14,950,101

⁽¹⁾  Includes merger related and repositioning expenses of $11.4 million and $389 thousand in the Banking Segment for the three months ended September 30, 2016 and 2015, respectively.

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	Banking		Leasing		Mortgage Banking		Consolidated
Nine months ended September 30, 2016
Net interest income	$	341,445	$	7,002	$	24,230	$	372,677
Provision for credit losses	14,390		2,045		506		16,941
Non-interest income	112,221		53,670		116,189		282,080
Non-interest expense (1)	307,733		35,916		110,442		454,091
Income tax expense	36,120		8,872		11,788		56,780
Net income	$	95,423	$	13,839	$	17,683	$	126,945
Total assets	$	16,453,379	$	1,126,847	$	1,761,656	$	19,341,882
Nine months ended September 30, 2015
Net interest income	$	313,192	$	8,762	$	21,883	$	343,837
Provision for credit losses	12,783		1,598		247		14,628
Non-interest income	94,197		61,383		90,888		246,468
Non-interest expense (1)	271,248		34,866		100,809		406,923
Income tax expense	35,509		13,218		4,686		53,413
Net income	$	87,849	$	20,463	$	7,029	$	115,341
Total assets	$	12,759,341	$	956,433	$	1,234,327	$	14,950,101

⁽¹⁾  Includes merger related and repositioning expenses of $17.2 million and $9.6 million in the Banking Segment for the nine months endedSeptember 30, 2016 and 2015, respectively.

Note 17.   Preferred Stock

On August 18, 2014, in connection with the Taylor Capital merger, the Company issued one share of its Perpetual Non-Cumulative Preferred Stock, Series A (“Company Series A Preferred Stock”), in exchange for each of the 4,000,000 outstanding shares of Taylor Capital’s Perpetual Non-Cumulative Preferred Stock, Series A. Holders of the Company Series A Preferred Stock are entitled to receive, when as and if declared by the Company’s board of directors, non-cumulative cash dividends on the liquidation preference amount, which is $25 per share, at a rate of 8.00% per annum, payable quarterly. The Company Series A Preferred Stock is callable in February 2018. The Company Series A Preferred Stock is included in Tier 1 capital for regulatory capital purposes.

On August 24, 2016, in connection with the American Chartered merger, the Company issued one share of its Cumulative Voting Convertible Preferred Stock, Series B ("Company Series B Preferred Stock"), in exchange for each of the 525 shares of American Chartered's Series D Preferred Stock outstanding immediately prior to the merger whose holders did not elect to receive the same consideration in the Merger as holders of American Chartered Common Stock, based on the number of shares of American Chartered Common Stock into which each such share of American Chartered Series D Preferred Stock would otherwise then be convertible. Holders of the Company Series B Preferred Stock are entitled to receive cumulative cash dividends on the liquidation preference amount, which is $1,000 per share, at a rate of 8.00% per annum, have the right to vote on all matters upon which holders of the Company's common stock are entitled to vote and have the right to convert each share into shares of the Company's common stock at any time. The Company Series B Preferred stock has a mandatory conversion date of September 20, 2017. The Company Series B Preferred Stock is included in Tier 2 capital for regulatory capital purposes.

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following is a discussion and analysis of MB Financial, Inc.’s financial condition and results of operations and should be read in conjunction with the consolidated financial statements and notes thereto appearing elsewhere in this report. The words “the Company,” “we,” “our” and “us” refer to MB Financial, Inc. and its consolidated subsidiaries, unless we indicate otherwise.

Overview

The profitability of our operations depends primarily on our net interest income after provision for credit losses, which is the difference between interest earned on interest earning assets and interest paid on interest bearing liabilities less provision for credit losses.  The provision for credit losses is dependent on changes in our loan portfolio and management’s assessment of the collectability of our loan portfolio as well as prevailing economic and market conditions.  

Our net income is also affected by non-interest income and non-interest expenses.  During the periods under report, non-interest income included revenue from our key fee initiatives: net lease financing income, mortgage banking revenue, commercial deposit and treasury management fees, trust and asset management fees, card fees and capital markets and international banking fees. Non-interest income also included consumer and other deposit service fees, brokerage fees, loan service fees, increase in cash surrender value of life insurance, net (gain) loss on investment securities, net gain (loss) on sale of assets and other operating income. During the periods under report, non-interest expenses included salaries and employee benefits expense, occupancy and equipment expense, computer services and telecommunication expense, advertising and marketing expense, professional and legal expense, other intangibles amortization expense, branch exit and facilities impairment charges, net (gain) loss on other real estate owned and other related expenses, prepayment fees on interest bearing liabilities and other operating expenses. Additionally, dividends on preferred shares reduced net income available to common stockholders.

Net interest income is affected by changes in the volume and mix of interest earning assets, interest earned on those assets, the volume and mix of interest bearing liabilities and interest paid on interest bearing liabilities. Non-interest income and non-interest expenses are impacted by growth of banking, leasing and mortgage banking operations and growth in the number of loan and deposit accounts through both acquisitions and core banking and leasing business growth. Growth in operations affects other expenses primarily as a result of additional employee, branch facility and promotional marketing expense. Growth in the number of loan and deposit accounts affects other income, including service fees as well as other expenses such as computer services, supplies, postage, telecommunications and other miscellaneous expenses. Non-performing asset levels impact salaries and benefits, legal expenses and other real estate owned expenses.

On August 24, 2016, the Company completed its merger with American Chartered Bancorp, Inc. ("American Chartered"). Consideration paid by the Company was $487.4 million, including $382.8 million in common stock (9.7 million shares), $102.3 million in cash and $2.3 million in preferred stock and stock-based awards assumed. The results of operations of American Chartered have been included in our results of operations for the 37 days between the date of the merger and quarter end. The Company recorded $268.8 million in goodwill and $25.5 million in other intangibles as a result of this acquisition. These and other amounts recognized for this business combination in the financial statements as of September 30, 2016 have been determined only provisionally as fair values continue to be assessed. See Note 4 of the notes to our consolidated financial statements for additional information.    

On December 31, 2015, the Company completed the acquisition of MSA Holdings, LLC, ("MSA") the parent company of MainStreet Investment Advisors, LLC and Cambium Asset Management, LLC. The Company recorded $13.5 million in goodwill and $8.8 million in other intangibles as a result of this acquisition. See Note 4 of the notes to our consolidated financial statements for additional information.

The Company had net income of $44.4 million for the three months ended September 30, 2016 compared to $40.3 million for the three months ended September 30, 2015. Net income available to common stockholders was $42.4 million for the three months ended September 30, 2016 compared to $38.3 million for the three months ended September 30, 2015. Fully diluted earnings per common share were $0.54 for the three months ended September 30, 2016 compared to $0.51 per common share for the three months ended September 30, 2015.

The Company had net income of $126.9 million for the nine months endedSeptember 30, 2016 compared to $115.3 million for the nine months endedSeptember 30, 2015. Net income available to common stockholders was $120.9 million for the nine months endedSeptember 30, 2016 compared to $109.3 million for the nine months endedSeptember 30, 2015. Fully

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diluted earnings per common share were $1.60 for the nine months endedSeptember 30, 2016 compared to $1.45 per common share for the nine months endedSeptember 30, 2015.

The results of operations for the nine months endedSeptember 30, 2016 and 2015 were impacted by $17.2 million and $9.6 million in merger related and repositioning expenses, respectively. See "Non-interest Expenses" section for a detailed schedule of merger related and repositioning expenses.

Critical Accounting Policies

Our consolidated financial statements are prepared in conformity with accounting principles generally accepted in the United States of America and follow general practices within the industries in which we operate.  This preparation requires management to make estimates, assumptions, and judgments that affect the amounts reported in the financial statements and accompanying notes.  These estimates, assumptions, and judgments are based on information available as of the date of the financial statements; accordingly, as this information changes, actual results could differ from the estimates, assumptions, and judgments reflected in the financial statements.  Certain policies 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 expected.  Management believes the following policies are both important to the portrayal of our financial condition and results of operations and require subjective or complex judgments; therefore, management considers the following to be critical accounting policies.  Management has reviewed the application of these polices with the Audit Committee of our Board of Directors.

Allowance for Loan and Lease Losses.  The allowance for loan and lease losses is subject to the use of estimates, assumptions, and judgments in management's evaluation process used to determine the adequacy of the allowance for loan and lease losses, which combines several factors: management's ongoing review and grading of the loan portfolio, consideration of past loan loss experience, trends in past due and non-performing loans, risk characteristics of the various classifications of loans, existing economic conditions, the fair value of underlying collateral, and other qualitative and quantitative factors which could affect probable credit losses. Because current economic conditions can change and future events are inherently difficult to predict, the anticipated amount of estimated loan losses, and therefore the adequacy of the allowance, could change significantly. As an integral part of their examination process, various regulatory agencies also review the allowance for loan and lease losses. Such agencies may require that certain loan balances be charged off when their credit evaluations differ from those of management or require that adjustments be made to the allowance for loan and lease losses, based on their judgments about information available to them at the time of their examination. We believe the allowance for loan and lease losses is appropriate and properly recorded in the financial statements.  See “Allowance for Loan and Lease Losses” section below for further analysis.

Residual Value of Our Direct Finance, Leveraged, and Operating Leases.  Lease residual value represents the present value of the estimated fair value of the leased equipment at the termination date of the lease. Realization of these residual values depends on many factors, including management’s use of estimates, assumptions, and judgment to determine such values. Several other factors outside of management’s control may reduce the residual values realized, including general market conditions at the time of expiration of the lease, whether there has been technological or economic obsolescence or unusual wear and tear on, or use of, the equipment and the cost of comparable equipment. If, upon the expiration of a lease, we sell the equipment and the amount realized is less than the recorded value of the residual interest in the equipment, we will recognize a loss reflecting the difference. On a quarterly basis, management reviews the lease residuals for potential impairment. If we fail to realize our aggregate recorded residual values, our financial condition and profitability could be adversely affected.  At September 30, 2016, the aggregate residual value of the equipment leased under our direct finance, leveraged, and operating leases totaled $168.0 million.  See Note 1 and Note 6 to the audited consolidated financial statements contained in our Annual Report Form 10-K for the year ended December 31, 2015 for additional information.

Income Tax Accounting.  ASC Topic 740 provides guidance on accounting for income taxes by prescribing the minimum recognition threshold that a tax position must meet to be recognized in the financial statements. ASC Topic 740 also provides guidance on measurement, recognition, classification, interest and penalties, accounting in interim periods, disclosure and transition.  As of September 30, 2016, the Company had $19 thousand of uncertain tax positions.  The Company elects to treat interest and penalties recognized for the underpayment of income taxes as income tax expense. However, interest and penalties imposed by taxing authorities on issues specifically addressed in ASC Topic 740 will be taken out of the tax reserves up to the amount allocated to interest and penalties. The amount of interest and penalties exceeding the amount allocated in the tax reserves will be treated as income tax expense.  As of September 30, 2016, the Company had approximately $2 thousand of accrued interest related to tax reserves.  The application of income tax law is inherently complex. Laws and regulations in this area are voluminous and are often ambiguous. As such, we are required to make many subjective assumptions and judgments regarding our income tax exposures. Interpretations of, and guidance surrounding income tax laws and regulations change over time. As such, changes in our subjective assumptions and judgments can materially affect amounts recognized in the consolidated balance sheets and statements of operations.

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Fair Value of Assets and Liabilities.  ASC Topic 820 defines fair value as the price that would be received to sell a financial asset or paid to transfer a financial liability in an orderly transaction between market participants at the measurement date. The degree of management judgment involved in determining the fair value of assets and liabilities is dependent upon the availability of quoted market prices or observable market parameters. For financial instruments that trade actively and have quoted market prices or observable market parameters, there is minimal subjectivity involved in measuring fair value. When observable market prices and parameters are not fully available, management judgment is necessary to estimate fair value. In addition, changes in market conditions may reduce the availability of quoted prices or observable data. For example, reduced liquidity in the capital markets or changes in secondary market activities could result in observable market inputs becoming unavailable. Therefore, when market data is not available, the Company would use valuation techniques requiring more management judgment to estimate the appropriate fair value measurement.

See Note 13 to the consolidated financial statements for a complete discussion on the Company’s use of fair valuation of assets and liabilities and the related measurement techniques.

Goodwill.  The excess of the cost of an acquisition over the fair value of the net assets acquired, including core deposit and client relationship intangibles, consists of goodwill.  See Note 7 to our consolidated financial statements for further information regarding core deposit and client relationship intangibles.  The Company reviews goodwill to determine potential impairment annually, or more frequently if events and circumstances indicate that goodwill might be impaired, by comparing the carrying value of the reporting units with the fair value of the reporting units.

The Company’s annual assessment date for goodwill impairment testing is as of December 31. Goodwill is tested for impairment at the reporting unit level. The Company has three reporting units: banking, leasing and mortgage banking.  No impairment losses were recognized during the nine months endedSeptember 30, 2016 or 2015. We are not aware of any events or circumstances subsequent to our annual goodwill impairment testing date of December 31, 2015 that would indicate impairment of goodwill at September 30, 2016. The carrying amount of goodwill was $993.8 million and $725.1 million at September 30, 2016 and December 31, 2015, respectively. The change in the carrying amount of goodwill from December 31, 2015 was due to the American Chartered merger and adjustments recognized for the MSA acquisition.

Valuation of Mortgage Servicing Rights. The Company originates and sells residential mortgage loans in the secondary market and may retain the right to service the loans sold. Servicing involves the collection of payments from individual borrowers and the distribution of those payments to the investors. Upon a sale of mortgage loans for which servicing rights are retained, the retained mortgage servicing rights asset is capitalized at the fair value of future net cash flows expected to be realized for performing servicing activities. Purchased mortgage servicing rights are recorded at the purchase price at the date of purchase and at fair value thereafter.

Mortgage servicing rights do not trade in an active market with readily observable prices. The Company determines the fair value of mortgage servicing rights by estimating the fair value of the future cash flows associated with the mortgage loans being serviced. Key economic assumptions used in measuring the fair value of mortgage servicing rights include, but are not limited to, prepayment speeds, discount rates, delinquencies and cost to service. The assumptions used in the valuation model are validated on a periodic basis. The fair value is validated on a quarterly basis with an independent third party. Material discrepancies between the internal valuation and the third party valuation are analyzed and resolved by an internal committee.

The Company has elected to account for mortgage servicing rights using the fair value option. Changes in the fair value are recognized in mortgage banking revenue on the Company's consolidated statements of operations.

Recent Accounting Pronouncements.  Refer to Note 2 of our consolidated financial statements for a description of recent accounting pronouncements including the respective dates of adoption and anticipated effects on results of operations and financial condition.

54

Net Interest Income

The following table presents, for the periods indicated, the total dollar amount of interest income from average interest earning assets and the related yields, as well as the interest expense on average interest bearing liabilities, and the related costs, expressed both in dollars and rates (dollars in thousands).  The table below and the discussion that follows contain presentations of net interest income and net interest margin on a tax-equivalent basis, which is adjusted for the tax-favored status of income from certain loans and investments.  We believe this measure to be the preferred industry measurement of net interest income, as it provides a relevant comparison between taxable and non-taxable amounts. The table below and the discussion that follows also contains presentations of net interest margin on a tax equivalent basis excluding the effect of acquisition accounting discount accretion on loans acquired through the American Chartered and Taylor Capital mergers ("bank mergers").

Reconciliations of net interest income and net interest margin on a tax-equivalent basis and net interest margin on a tax-equivalent basis excluding the effect of acquisition accounting discount accretion on loans acquired through the bank mergers to net interest income and net interest margin in accordance with accounting principles generally accepted in the United States of America are provided in the table. For additional information, see "Non-GAAP Financial Information."

	Three Months Ended September 30,
(dollars in thousands)	2016						2015
	Average				Yield/		Average				Yield/
	Balance		Interest		Rate		Balance		Interest		Rate
Interest Earning Assets:
Loans held for sale	$	835,953	$	7,074	3.38	%	$	841,663	$	7,904	3.76	%
Loans (1) (2)	10,697,141		111,601		4.15		8,854,698		92,669		4.15
Loans exempt from federal income taxes (3)	374,126		4,378		4.58		330,721		3,513		4.16
Taxable investment securities	1,592,547		8,844		2.22		1,543,434		9,655		2.50
Investment securities exempt from federal income taxes (3)	1,318,855		15,972		4.84		1,356,702		16,541		4.88
Federal funds sold	36		—		1.00		38		—		1.00
Other interest earning deposits	103,061		164		0.63		138,542		89		0.25
Total interest earning assets	14,921,719		$	148,033	3.95		13,065,798		$	130,371	3.96
Non-interest earning assets	2,326,712						1,993,631
Total assets	$	17,248,431					$	15,059,429
Interest Bearing Liabilities:
Deposits:
NOW, money market and interest bearing deposits	$	4,161,913	$	2,299	0.22	%	$	4,119,625	$	1,832	0.18	%
Savings deposits	1,080,609		231		0.09		965,060		124		0.05
Time deposits	1,959,989		4,151		0.84		1,732,165		3,146		0.72
Short-term borrowings	1,144,899		1,092		0.38		1,079,978		395		0.15
Long-term borrowings and junior subordinated notes	599,133		2,367		1.55		282,033		1,886		2.62
Total interest bearing liabilities	8,946,543		$	10,140	0.45		8,178,861		$	7,383	0.36
Non-interest bearing deposits	5,524,043						4,428,065
Other non-interest bearing liabilities	461,243						378,276
Stockholders’ equity	2,316,602						2,074,227
Total liabilities and stockholders’ equity	$	17,248,431					$	15,059,429
Net interest income/interest rate spread (4)			$	137,893	3.50	%			$	122,988	3.60	%
Less: taxable equivalent adjustment			7,122						7,019
Net interest income, as reported			$	130,771					$	115,969
Net interest margin (5)					3.49	%					3.52	%
Tax equivalent effect					0.19	%					0.21	%
Net interest margin on a fully tax equivalent basis (5)					3.68	%					3.73	%
Effect of acquisition accounting discount accretion on loans acquired through bank mergers					(0.18	)%					(0.24	)%
Net interest margin on a fully tax equivalent basis, excluding the effect of acquisition accounting discount accretion on loans acquired through bank mergers					3.50	%					3.49	%

(1)       Non-accrual loans are included in average loans.

(2)       Interest income includes amortization of net deferred loan origination fees and costs.

(3)       Non-taxable loan and investment income is presented on a fully tax equivalent basis assuming a 35% tax rate.

(4)       Interest rate spread represents the difference between the average yield on interest earning assets and the average cost of interest bearing liabilities and is presented on a fully tax equivalent basis.

(5)       Net interest margin represents net interest income as a percentage of average interest earning assets.

Net interest income on a fully tax equivalent basis increased$14.9 million during the three months ended September 30, 2016 compared to the three months ended September 30, 2015 primarily due to higher average loan balances as a result of the

55

loans acquired through the American Chartered merger as well as loan growth in the legacy portfolio. The net interest margin, expressed on a fully tax equivalent basis, was 3.68% for the third quarter of 2016 and 3.73% for the third quarter of 2015. Net interest income in the third quarter of 2016 included interest income of $6.2 million resulting from accretion of the acquisition accounting discount recorded on loans acquired in bank mergers in the third quarter of 2016 compared to $7.4 million in the third quarter of 2015. Excluding the accretion of the acquisition accounting discount recorded on loans acquired in bank mergers, our net interest margin on a fully tax equivalent basis would have been 3.50% for the three months ended September 30, 2016 and 3.49% for the three months ended September 30, 2015.

	Nine Months Ended September 30,
(dollars in thousands)	2016						2015
	Average				Yield/		Average				Yield/
	Balance		Interest		Rate		Balance		Interest		Rate
Interest Earning Assets:
Loans held for sale	$	741,880	$	19,351	3.48	%	$	760,956	$	20,528	3.60	%
Loans (1) (2)	9,944,457		314,478		4.22		8,688,434		277,659		4.27
Loans exempt from federal income taxes (3)	360,284		12,574		4.59		327,292		10,333		4.21
Taxable investment securities	1,528,251		26,209		2.29		1,548,369		29,591		2.55
Investment securities exempt from federal income taxes (3)	1,340,185		48,926		4.87		1,248,978		46,161		4.93
Federal funds sold	38		—		1.00		60		—		1.00
Other interest earning deposits	105,660		430		0.54		109,074		208		0.25
Total interest earning assets	14,020,755		$	421,968	4.02		12,683,163		$	384,480	4.05
Non-interest earning assets	2,142,106						2,004,278
Total assets	$	16,162,861					$	14,687,441
Interest Bearing Liabilities:
Deposits:
NOW and money market deposit	$	4,036,193	$	6,434	0.21	%	$	3,999,844	$	5,061	0.17	%
Savings deposit	1,024,050		564		0.07		963,291		379		0.05
Time deposits	1,856,635		11,257		0.81		1,780,491		8,861		0.67
Short-term borrowings	1,051,802		2,723		0.35		942,057		1,027		0.15
Long-term borrowings and junior subordinated notes	613,998		6,788		1.45		279,290		5,542		2.62
Total interest bearing liabilities	8,582,678		$	27,766	0.43		7,964,973		$	20,870	0.35
Non-interest bearing deposits	4,980,904						4,301,483
Other non-interest bearing liabilities	416,667						362,794
Stockholders’ equity	2,182,612						2,058,191
Total liabilities and stockholders’ equity	$	16,162,861					$	14,687,441
Net interest income/interest rate spread (4)			$	394,202	3.59	%			$	363,610	3.70	%
Less: taxable equivalent adjustment			21,525						19,773
Net interest income, as reported			$	372,677					$	343,837
Net interest margin (5)					3.55	%					3.62	%
Tax equivalent effect					0.21	%					0.21	%
Net interest margin on a fully tax equivalent basis (5)					3.76	%					3.83	%
Effect of acquisition accounting discount accretion on loans acquired through bank mergers					(0.22	)%					(0.27	)%
Net interest margin on a fully tax equivalent basis, excluding the effect of acquisition accounting discount accretion on loans acquired through bank mergers					3.54	%					3.56	%

(1)       Non-accrual loans are included in average loans.

(2)       Interest income includes amortization of net deferred loan origination fees and costs.

(3)       Non-taxable loan and investment income is presented on a fully tax equivalent basis assuming a 35% tax rate.

(4)       Interest rate spread represents the difference between the average yield on interest earning assets and the average cost of interest bearing liabilities and is presented on a fully tax equivalent basis.

(5)       Net interest margin represents net interest income as a percentage of average interest earning assets.

Net interest income on a fully tax equivalent basis increased$30.6 million during the nine months endedSeptember 30, 2016 compared to the nine months endedSeptember 30, 2015 primarily due to an increase in average loans, a result of the loan growth in the legacy portfolio and, to a lesser extent, loans acquired through the American Chartered merger, partially offset by an increase in average borrowings and an increase in the cost of deposits. The net interest margin, expressed on a fully tax equivalent basis, was 3.76% for the nine months endedSeptember 30, 2016 and 3.83% for the nine months endedSeptember 30, 2015. Net interest income in the nine months endedSeptember 30, 2016 included interest income of $21.2 million resulting from accretion of the acquisition accounting discount recorded on loans acquired in bank mergers in the nine months endedSeptember 30, 2016 compared to $23.9 million in the nine months endedSeptember 30, 2015. Excluding the accretion of the acquisition accounting discount recorded on loans acquired in bank mergers, our net interest margin on a fully tax equivalent basis would have been 3.54% for the nine months endedSeptember 30, 2016 compared to 3.56% for the nine months endedSeptember 30, 2015.

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Non-interest Income

The following table presents non-interest income for the three months ended September 30, 2016 compared to the three months ended September 30, 2015 (in thousands):

	Three Months Ended
	September 30,
	2016		2015		Increase/ (Decrease)			Percentage Change
Non-interest income:
Mortgage banking revenue	$	49,095	$	30,692	$	18,403		60.0	%
Lease financing, net	18,864		20,000		(1,136		)	(5.7	)
Commercial deposit and treasury management fees	12,957		11,472		1,485			12.9
Trust and asset management fees	8,244		6,002		2,242			37.4
Card fees	4,161		3,335		826			24.8
Capital markets and international banking fees	3,313		2,357		956			40.6
Consumer and other deposit service fees	3,559		3,499		60			1.7
Brokerage fees	1,294		1,281		13			1.0
Loan service fees	1,792		1,531		261			17.0
Increase in cash surrender value of life insurance	1,055		852		203			23.8
Net gain (loss) on investment securities	—		371		(371		)	(100.0	)
Net loss on sale of assets	5		1		4			400.0
Other operating income	4,048		858		3,190			371.8
Total non-interest income	$	108,387	$	82,251	$	26,136		31.8	%

Non-interest income increased by $26.1 million, or 31.8%, for the three months ended September 30, 2016 compared to the three months ended September 30, 2015.

• Mortgage banking revenue increased due to higher origination volumes as a result of the favorable interest rate environment and higher gains on sale margins.

• Lease financing revenue decreased due to a decrease in residual gains.

• Commercial deposit and treasury management fees increased due to new customer activity as well as the increased customer base as a result of the American Chartered merger.

• Trust and asset management fees increased due to the addition of new customers as well as the acquisition of MSA.

• Card fees increased due to higher debit and credit card fees.

• Capital markets and international banking services fees increased primarily due to higher swap fees.

• Other operating income increased due to higher earnings from investments in Small Business Investment Companies.

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The following table presents non-interest income for the nine months endedSeptember 30, 2016 compared to the nine months endedSeptember 30, 2015 (in thousands):

	Nine Months Ended
	September 30,
	2016			2015			Increase/ (Decrease)			Percentage Change
Non-interest income:
Mortgage banking revenue	$	116,192		$	90,884		$	25,308		27.8	%
Lease financing, net	53,618			60,644			(7,026		)	(11.6	)
Commercial deposit and treasury management fees	36,383			33,572			2,811			8.4
Trust and asset management fees	24,430			17,468			6,962			39.9
Card fees	11,731			11,671			60			0.5
Capital markets and international banking fees	9,311			5,793			3,518			60.7
Consumer and other deposit service fees	9,745			9,842			(97		)	(1.0	)
Brokerage fees	3,767			4,502			(735		)	(16.3	)
Loan service fees	5,505			4,369			1,136			26.0
Increase in cash surrender value of life insurance	2,759			2,527			232			9.2
Net gain (loss) on investment securities	269			(173		)	442			255.5
Net loss on sale of assets	(45		)	(2		)	(43		)	NM
Other operating income	8,415			5,371			3,044			56.7
Total non-interest income	$	282,080		$	246,468		$	35,612		14.4	%

NM - Not meaningful

Non-interest income increased by $35.6 million, or 14.4%, for the nine months endedSeptember 30, 2016 compared to the nine months endedSeptember 30, 2015.

• Mortgage banking revenue increased due to higher mortgage servicing fees and higher gains on sale margins.

• Lease financing revenues decreased due to lower residual gains and fees from the sale of third-party equipment maintenance contracts.

• Commercial deposit and treasury management fees increased due to new customer activity as well as the increased customer base as a result of the American Chartered merger.

• Trust and asset management fees increased due to the addition of new customers as well as the acquisitions of MSA on December 31, 2015 and the Illinois court-appointed guardianship and special needs trust business in the third quarter of 2015.

• Capital markets and international banking services fees increased due to higher swap, syndication and M&A advisory fees partly offset by lower commercial real estate advisory fees.

• Loan service fees increased due to higher unused line and letter of credit fees.

• Other operating income increased due to higher earnings from investments in Small Business Investment Companies.

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Non-interest Expenses

The following table presents non-interest expense for the three months ended September 30, 2016 compared to the three months ended September 30, 2015 (in thousands):

	Three Months Ended
	September 30,
	2016			2015		Increase/ (Decrease)			Percentage Change
Non-interest expenses:
Salaries and employee benefits	$	111,478		$	87,891	$	23,587		26.8	%
Occupancy and equipment	14,766			12,458		2,308			18.5
Computer services and telecommunication	12,836			8,567		4,269			49.8
Advertising and marketing	3,084			2,578		506			19.6
Professional and legal	4,460			1,801		2,659			147.6
Other intangibles amortization	1,674			1,542		132			8.6
Branch exit and facilities impairment charges	(2,908		)	70		(2,978		)	NM
Net (gain) loss recognized on other real estate owned and other expense	(721		)	577		(1,298		)	(225.0	)
Other operating expenses	25,716			18,782		6,934			36.9
Total non-interest expenses	$	170,385		$	134,266	$	36,119		26.9	%

 NM - Not meaningful

Non-interest expenses increased by $36.1 million, or 26.9%, for the three months ended September 30, 2016 from the three months ended September 30, 2015. Non-interest expenses include $11.4 million and $389 thousand in merger related and repositioning expenses for the three months ended September 30, 2016 and 2015, respectively. See merger related and repositioning expenses detail below. Explanations for changes other than merger related and repositioning expenses are as follows:

• Salaries and employee benefits expense increased due to higher salaries, commission, bonus, temporary help, health insurance and stock-based compensation expense.

• Salaries expense increased due to annual pay increases, new hires and the additional staff from the acquisition of MSA and American Chartered merger.

• Commission expense increased due to higher commissions paid in our mortgage banking segment as a result of higher mortgage origination revenues.

• Bonus expense increased based on company performance through September 30, 2016 as well as an increase due to new hires.

• Temporary help expense increased due temporary help in our IT and mortgage areas.

• Occupancy and equipment expense increased due to higher depreciation expense and rental operating expenses as a result of the acquisition of MSA and the American Chartered merger, new offices opened at our mortgage banking segment and an office relocation in our leasing segment.

• Computer services and telecommunication expense increased due to higher processing costs as a result of increased customer activity and investments in systems.

• Professional and legal expense increased due to an increase in litigation fees.

• Non-interest expense was also impacted by higher gains recognized on other real estate owned properties.

• Other operating expenses increased due to a $4.0 million contribution to MB Financial Charitable Foundation as well as higher FDIC premiums (as a result of MB Financial Bank, N.A. (the "Bank") exceeding $10 billion in assets) and filing and other loan expense.

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The following table presents the detail of the merger related and repositioning expenses for the three months ended September 30, 2016 and 2015 (dollars in thousands):

	Three Months Ended
	September 30,
	2016			2015
Merger related and repositioning expenses:
Salaries and employee benefits	$	8,684		$	3
Occupancy and equipment expense	104			2
Computer services and telecommunication expense	3,105			9
Advertising and marketing expense	53			—
Professional and legal expense	1,681			305
Branch exit and facilities impairment charges	(2,908		)	70
Other operating expenses	649			—
Total merger related and repositioning expenses	$	11,368		$	389

In the third quarter of 2016, merger related and repositioning expenses primarily included costs incurred in connection with the American Chartered merger as well as a reversal of an exit cost due to a favorable lease termination on a branch acquired through the Taylor Capital merger.

The following table presents non-interest expense for the nine months endedSeptember 30, 2016 compared to the nine months endedSeptember 30, 2015 (in thousands):

	Nine Months Ended
	September 30,
	2016			2015		Increase/ (Decrease)			Percentage Change
Non-interest expenses:
Salaries and employee benefits	$	292,073		$	258,822	$	33,251		12.8	%
Occupancy and equipment expense	41,441			37,575		3,866			10.3
Computer services and telecommunication expense	31,668			26,008		5,660			21.8
Advertising and marketing expense	8,926			7,521		1,405			18.7
Professional and legal expense	10,370			6,884		3,486			50.6
Other intangibles amortization expense	4,917			4,569		348			7.6
Branch exit and facilities impairment charges	(2,709		)	7,899		(10,608		)	(134.3	)
Net (gain) loss recognized on other real estate owned and other expense	(809		)	2,197		(3,006		)	(136.8	)
Prepayment fees on interest bearing liabilities	—			85		(85		)	(100.0	)
Other operating expenses	68,214			55,363		12,851			23.2
Total non-interest expenses	$	454,091		$	406,923	$	47,168		11.6	%

Non-interest expenses increased by $47.2 million, or 11.6%, for the nine months endedSeptember 30, 2016 from the nine months endedSeptember 30, 2015. Non-interest expenses include $17.2 million and $9.6 million in merger related and repositioning expenses for the nine months endedSeptember 30, 2016 and 2015, respectively. See merger related and repositioning expenses detail below. Explanations for changes other than merger related and repositioning expenses are as follows:

• Salaries and employee benefits expense increased due to higher salaries, bonus, temporary help and 401(k) match and profit sharing contribution expenses partly offset by lower commission expense.

• Salaries increased due to annual pay increases, new hires and the increased staff from the American Chartered merger and the acquisition of MSA.

• Bonus expense increased based on company performance through September 2016 as well as an increase due to new hires.

• Temporary help expense increased due temporary help in our IT and mortgage areas.

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• Commission expense decreased due to lower commissions paid in our leasing segment as a result of lower lease financing revenues.

• Occupancy and equipment expense increased due to higher depreciation expense and rental operating expenses as a result of the acquisition of MSA and the American Chartered merger, new offices opened at our mortgage banking segment and an office relocation in our leasing segment.

• Computer services and telecommunication expense increased due to higher processing costs as a result of increased customer activity and investments in systems.

• Advertising and marketing expense increased due to increased brand awareness advertising.

• Professional and legal expense increased due to an increase in litigation and consulting fees.

• Non-interest expense was also impacted by higher gains recognized on other real estate owned properties.

• Other operating expenses increased due to higher FDIC premiums (as a result of MB Financial Bank, N.A. (the "Bank") exceeding $10 billion in assets), filing and other loan expense and card expenses (higher rewards and product development expense) as well as a $4.0 million contribution to MB Financial Charitable Foundation.

The following table presents the detail of the merger related and repositioning expenses for the nine months endedSeptember 30, 2016 and 2015 (dollars in thousands):

	Nine Months Ended
	September 30,
	2016			2015
Merger related and repositioning expenses:
Salaries and employee benefits	$	9,089		$	36
Occupancy and equipment expense	112			275
Computer services and telecommunication expense	3,921			409
Advertising and marketing expense	117			—
Professional and legal expense	1,879			1,006
Branch exit and facilities impairment charges	(2,864		)	7,829
Contingent consideration expense - Celtic acquisition (1)	2,703			—
Other operating expenses	2,264			67
Total merger related and repositioning expenses	$	17,221		$	9,622

⁽¹⁾  Resides in other operating expenses in the consolidated statements of operations.

During the nine months ended September 30, 2016, merger related and repositioning expenses primarily included costs incurred in connection with the American Chartered merger, a reversal of an exit cost due to a favorable lease termination on a branch acquired through the Taylor Capital merger and an increase in our contingent consideration accrual for our acquisition of Celtic Leasing Corp. as a result of stronger lease residual performance than previously estimated. During the nine months ended September 30, 2015, merger related and repositioning expenses were impacted primarily by exit costs on branches we closed in connection with the Taylor Capital merger.

Income Taxes

Income tax expense for the nine months endedSeptember 30, 2016 was $56.8 million compared to $53.4 million for the nine months endedSeptember 30, 2015. The increase was primarily due to an increase in our pre-tax income during the nine months endedSeptember 30, 2016 partially offset by the $1.8 million income tax benefit associated with stock-based compensation a result of the adoption of new authoritative accounting guidance under ASC Topic 718 "Compensation - Stock Compensation" in the third quarter of 2016.

Operating Segments

The Company's operations consist of three reportable operating segments: Banking, Leasing and Mortgage Banking. Our Banking Segment generates revenues primarily from its lending, deposit gathering and fee business activities. Our Leasing Segment generates revenues through lease originations and related services offered through the Company's leasing subsidiaries: LaSalle Systems Leasing, Inc., Celtic Leasing Corp. and MB Equipment Finance, LLC. Our Mortgage Banking Segment originates residential mortgage loans for sale to investors through its retail and third party origination channels as well as residential mortgage loans held in our loan portfolio. The Mortgage Banking Segment also services residential mortgage loans owned by investors and the Company.

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Net income from our Banking Segment for the three months ended September 30, 2016decreased$674 thousand to $30.2 million compared to the three months ended September 30, 2015. This decrease was primarily due to higher salaries and employee benefits expense (due to annual pay increases, new hires, increased staff from the American Chartered merger and acquisition of MSA and bonus expense), the contribution to MB Financial Charitable Foundation, and merger related and repositioning expenses partly offset by the increase in net interest income driven by legacy loan growth and loans acquired through the American Chartered merger and an increase in non-interest income (trust and asset management fees, commercial deposit and treasury management fees, and capital markets and international banking fees). Net income from our Leasing Segment for the three months ended September 30, 2016decreased$2.9 million to $3.9 million compared to the three months ended September 30, 2015. This decrease in net income was due to the decrease in lease financing revenues as a result of lower residual gains and an increase in provision for credit losses. Net income from our Mortgage Banking Segment for the three months ended September 30, 2016increased$7.7 million to $10.4 million compared to the three months ended September 30, 2015. This increase in net income was due to an increase in mortgage origination fees as a result of higher origination volumes attributable to the favorable interest rate environment and higher gains on sale margins partly offset by higher salaries and benefits expense (due to annual pay increases, new hires and higher commissions) and volume-related other operating expenses.

Net income from our Banking Segment for the nine months endedSeptember 30, 2016increased$7.6 million to $95.4 million compared to the nine months endedSeptember 30, 2015. This increase in net income was primarily due to an increase in net interest income, driven by loan growth in the legacy portfolio and, to a lesser extent, loans acquired through the American Chartered merger, and an increase in other non-interest income. This increase was partly offset by higher salaries and employee benefits expense due to annual pay increases, new hires, increased staff from the American Chartered merger and acquisition of MSA and bonus expense based on company performance as well as an increase in provision for credit losses expense. Net income from our Leasing Segment for the nine months endedSeptember 30, 2016decreased$6.6 million to $13.8 million compared to the nine months endedSeptember 30, 2015. This decrease in net income was primarily due to a decrease in lease financing revenues, as a result of a decrease in residual gains and fees from the sale of third-party equipment maintenance contracts. Net income from our Mortgage Banking Segment for the nine months endedSeptember 30, 2016increased$10.7 million to $17.7 million compared to the nine months endedSeptember 30, 2015. This increase in net income was due to an increase in mortgage origination and servicing fees, partly offset by higher salaries expense due to annual pay increases and new hires and higher bonus expense.

Balance Sheet

Total assets increased$3.8 billion, or 24.1%, to $19.3 billion at September 30, 2016 from December 31, 2015 primarily due to the assets acquired through the American Chartered merger. 

• Cash and cash equivalents increased$94.8 million, or 24.9% from $381.4 million at December 31, 2015 to $476.3 million at September 30, 2016.

• Investment securities increased$190.8 million, or 6.5%, from December 31, 2015 to September 30, 2016 due to the investment securities acquired from the American Chartered merger offset by principal payments on our mortgage-backed securities.

• Total loans, excluding purchased credit-impaired, increased by $2.7 billion, or 28.2%, to $12.4 billion at September 30, 2016 from December 31, 2015, primarily due to the loans acquired from the American Chartered merger as well as growth in our legacy commercial-related credits.

Total liabilities increased by $3.3 billion, or 24.3%, to $16.8 billion at September 30, 2016 from December 31, 2015 primarily due to the liabilities assumed through the American Chartered merger.

• Total deposits increased by $2.8 billion, or 24.1%, to $14.3 billion at September 30, 2016 from December 31, 2015. Non-interest bearing deposits increased by $1.8 billion, or 38.5%, compared to December 31, 2015, while interest bearing deposits increased by $1.0 billion, or 14.4%. The increase in total deposits was primarily due to the deposits assumed in the American Chartered merger as well as strong growth in our legacy non-interest bearing deposits.

• Total borrowings increased by $424.9 million, or 26.7%, to $2.0 billion at September 30, 2016 primarily due to the increase in short-term FHLB advances.

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Total stockholders’ equity increased$476.1 million to $2.6 billion at September 30, 2016 compared to December 31, 2015 primarily as a result of the equity issued in the American Chartered merger as well as earnings for the nine months endedSeptember 30, 2016 net of dividends declared.

Investment Securities

The following table sets forth the amortized cost and fair value of our investment securities, by type of security as indicated (in thousands):

	September 30, 2016				December 31, 2015				September 30, 2015
	Amortized Cost		Fair Value		Amortized Cost		Fair Value		Amortized Cost		Fair Value
Available for sale
U.S. Government sponsored agencies and enterprises	$	53,456	$	53,968	$	63,805	$	64,611	$	64,008	$	65,461
States and political subdivisions	383,041		410,737		373,285		396,367		379,015		399,274
Residential mortgage-backed securities	1,066,834		1,076,337		759,816		763,549		683,955		693,225
Commercial mortgage-backed securities	93,962		96,993		128,509		130,107		150,638		154,201
Corporate bonds	208,940		210,193		222,784		219,628		228,711		228,251
Equity securities	10,932		11,128		10,757		10,761		10,701		10,826
Total Available for Sale	1,817,165		1,859,356		1,558,956		1,585,023		1,517,028		1,551,238
Held to maturity
States and political subdivisions	939,491		993,140		1,016,519		1,052,755		1,002,963		1,031,008
Residential mortgage-backed securities	175,771		182,698		214,291		222,012		221,889		232,204
Total Held to Maturity	1,115,262		1,175,838		1,230,810		1,274,767		1,224,852		1,263,212
Total	$	2,932,427	$	3,035,194	$	2,789,766	$	2,859,790	$	2,741,880	$	2,814,450

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Loan Portfolio

The following table sets forth the composition of our loan portfolio (excluding loans held for sale) as of the dates indicated showing the balances of legacy loans and loans acquired through the American Chartered and Taylor Capital mergers (dollars in thousands):

	September 30, 2016								December 31, 2015
	Legacy (1)		Acquired (2)		Total		% of Total		Legacy (1)		Acquired (2)		Total		% of Total
Commercial related credits:
Commercial loans	$	3,413,747	$	972,065	$	4,385,812	35	%	$	2,908,158	$	708,128	$	3,616,286	37	%
Commercial loans collateralized by assignment of lease payments	1,801,187		72,193		1,873,380		15		1,687,421		91,651		1,779,072		18
Commercial real estate	2,382,124		1,412,677		3,794,801		30		2,040,339		655,337		2,695,676		27
Construction real estate	412,455		38,568		451,023		4		238,918		13,142		252,060		3
Total commercial related credits	8,009,513		2,495,503		10,505,016		84		6,874,836		1,468,258		8,343,094		85
Other loans:
Residential real estate	692,205		306,622		998,827		8		466,794		161,375		628,169		6
Indirect vehicle	520,421		1,850		522,271		4		382,000		2,095		384,095		4
Home equity	181,340		93,948		275,288		2		202,231		14,342		216,573		2
Other consumer loans	76,768		1,188		77,956		1		80,329		332		80,661		1
Total other loans	1,470,734		403,608		1,874,342		15		1,131,354		178,144		1,309,498		13
Total loans excluding purchased credit-impaired loans	9,480,247		2,899,111		12,379,358		99		8,006,190		1,646,402		9,652,592		98
Purchased credit-impaired loans	94,562		66,776		161,338		1		92,429		48,977		141,406		2
Total loans	$	9,574,809	$	2,965,887	$	12,540,696	100	%	$	8,098,619	$	1,695,379	$	9,793,998	100	%

⁽¹⁾  Legacy loans include all loans other than those acquired through the American Chartered and Taylor Capital mergers, including loans acquired in connection with our FDIC-assisted transactions and our other acquisition transactions, as well as new loans originated subsequent to the American Chartered and Taylor Capital mergers and American Chartered and Taylor Capital loans that have been renewed.

⁽²⁾  Represents loans acquired through the American Chartered and Taylor Capital mergers that have not yet been renewed. These balances will decrease to zero over time.

Total loans, excluding purchased credit-impaired, increased by $2.7 billion to $12.4 billion at September 30, 2016 from December 31, 2015. Total loans increased by $2.7 billion to $12.5 billion at September 30, 2016 from $9.8 billion at December 31, 2015. The increase in total loans and total loans, excluding purchased credit-impaired, was primarily due to the loans acquired through the American Chartered merger. Legacy residential real estate loan balances have increased from December 31, 2015 as a result of retaining adjustable rate mortgages originated by our Mortgage Banking Segment in our loan portfolio. Legacy construction loans have increased from December 31, 2015 due to draws on new and existing credit lines primarily in the areas of apartments, healthcare and office. Legacy indirect vehicle loans have increased from December 31, 2015 as a result of growth in boat, motorcycle and other recreational vehicle loans.

Asset Quality

Non-performing loans include loans accounted for on a non-accrual basis and accruing loans contractually past due 90 days or more as to interest or principal. Management reviews the loan portfolio for problem loans on an ongoing basis. During the ordinary course of business, management becomes aware of borrowers that may not be able to meet the contractual requirements of loan agreements. These loans are placed under close supervision with consideration given to placing the loan on non-accrual status, increasing the allowance for loan and lease losses and (if appropriate) partial or full charge-off. After a loan is placed on non-accrual status, any interest previously accrued but not yet collected is reversed against current income. Generally, if interest payments are received on non-accrual loans, these payments will be applied to principal and not taken into income. Loans will not be placed back on accrual status unless back interest and principal payments are made. Our general policy is to place loans 90 days past due on non-accrual status, as well as those loans that continue to pay, but display a well-defined material weakness that we believe will result in a loss of principal and interest.

Non-performing loans exclude loans held for sale. Fair value of these loans as of acquisition includes estimates of credit losses.  

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The following table sets forth the amounts of non-performing loans, non-performing assets, potential problem loans, and purchased credit-impaired loans as well as other information regarding asset quality at the dates indicated (dollars in thousands):

	September 30, 2016			December 31, 2015			September 30, 2015
Non-performing loans:
Non-accruing loans	$	52,135		$	98,065		$	92,302
Loans 90 days or more past due, still accruing interest	1,774			6,596			4,275
Total non-performing loans	53,909			104,661			96,577
Other real estate owned	33,105			31,553			29,587
Repossessed assets	453			81			216
Total non-performing assets	$	87,467		$	136,295		$	126,380
Purchased credit-impaired loans	$	161,338		$	141,406		$	155,693
Total allowance for loan and lease losses	$	139,528		$	128,140		$	124,626
Accruing restructured loans (1)	28,561			26,991			20,120
Total non-performing loans to total loans	0.43		%	1.07		%	1.03		%
Total non-performing assets to total assets	0.45			0.87			0.85
Allowance for loan and lease losses to total non-performing loans	258.82			122.43			129.04

⁽¹⁾  Accruing restructured loans consists of loans that have been modified and are performing in accordance with those modified terms.

A loan is classified as a troubled debt restructuring when a borrower is experiencing financial difficulties that leads to a restructuring of the loan, and the Company grants concessions to the borrower in the restructuring that it would not otherwise consider. These concessions may include rate reductions, principal forgiveness, extension of maturity date and other actions intended to minimize potential losses.  A loan that is modified at a market rate of interest may no longer be classified as troubled debt restructuring in the calendar year subsequent to the restructuring if it is in compliance with the modified terms.  Payment performance prior and subsequent to the restructuring is taken into account in assessing whether it is likely that the borrower can meet the new terms.  This may result in the loan being returned to accrual at the time of restructuring.  A period of sustained repayment for at least six months generally is required for return to accrual status.

Occasionally, the Company will restructure a note into two separate notes (A/B structure), charging off the entire B portion of the note. The A note is structured with appropriate loan-to-value and cash flow coverage ratios that provide for a high likelihood of repayment. The A note is classified as a non-performing note until the borrower has displayed a historical payment performance for a reasonable time prior to and subsequent to the restructuring. A period of sustained repayment for at least six months generally is required to return the note to accrual status provided that management has determined that the performance is reasonably expected to continue. The A note will be classified as a restructured note (either performing or non-performing) through the calendar year of the restructuring that the historical payment performance has been established.

Non-performing assets consists of non-performing loans as well as other repossessed assets and other real estate owned.  Other real estate owned represents properties acquired through foreclosure or other proceedings and is recorded at fair value less the estimated cost of disposal at the date of acquisition.  Other real estate owned is evaluated regularly to ensure that the recorded amount is supported by its current fair value.  Valuation allowances to reduce the carrying amount to fair value less estimated costs of disposal are recorded as necessary.  Gains and losses and changes in valuations on other real estate owned are included in net gain (loss) recognized on other real estate within non-interest expense.  Expenses, net of rental income, from the operations of other real estate owned are reflected as a separate line item on the statement of operations.  Other repossessed assets primarily consist of repossessed vehicles.  Losses on repossessed vehicles are charged-off to the allowance when title is taken and the vehicle is valued.  Once the Bank obtains title, repossessed vehicles are not included in loans, but are classified as “other assets” on the consolidated balance sheets.  The typical holding period for repossessed vehicles (motorcycles, marine vehicles and recreational vehicles) can be more than 90 days as a result of cyclical trends in the motorcycle, marine vehicle and recreational vehicle markets.

Other real estate owned that is related to our FDIC-assisted transactions is excluded from non-performing assets. 

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The following table presents a summary of other real estate owned, excluding assets related to FDIC-assisted transactions, for the nine months endedSeptember 30, 2016 and 2015 (in thousands):

	September 30,
	2016			2015
Beginning balance	$	31,553		$	19,198
Transfers in at fair value less estimated costs to sell	3,566			15,612
Acquired from business combination	4,148			—
Capitalized other real estate owned costs	96			—
Fair value adjustments	980			(2,407		)
Net gains on sales of other real estate owned	843			337
Cash received upon disposition	(8,081		)	(3,153		)
Ending balance	$	33,105		$	29,587

Potential Problem Loans

We define potential problem loans as performing loans rated substandard and that do not meet the definition of a non-performing loan (See “Asset Quality” section above for non-performing loans). We do not necessarily expect to realize losses on potential problem loans, but we recognize potential problem loans carry a higher probability of default and require additional attention by management. The following table sets forth the aggregate principal amount of potential problem loans, excluding purchased credit-impaired loans, at the dates indicated (in thousands):

	September 30, 2016		December 31, 2015
Commercial loans	$	82,823	$	102,106
Commercial loans collateralized by assignment of lease payments	3,868		7,004
Commercial real estate	24,903		30,831
Total	$	111,594	$	139,941

Allowance for Loan and Lease Losses

Management believes the allowance for loan and lease losses accounting policy is critical to the portrayal and understanding of our financial condition and results of operations. Selection and application of this “critical accounting policy” involves judgments, estimates, and uncertainties that are subject to change. In the event that different assumptions or conditions were to prevail, and depending upon the severity of such changes, materially different financial condition or results of operations is a reasonable possibility.

We maintain our allowance for loan and lease losses at a level that management believes is appropriate to absorb probable losses on existing loans based on an evaluation of the collectability of loans, underlying collateral and prior loss experience.

Our allowance for loan and lease losses is comprised of three elements: a commercial related general loss reserve; a commercial related specific reserve for impaired loans; and a consumer related reserve for smaller-balance homogenous loans. Each element is discussed below.

Commercial Related General Loss Reserve.  We maintain a general loan loss reserve for the four categories of commercial-related loans in our portfolio: commercial loans, commercial loans collateralized by the assignment of lease payments (lease loans), commercial real estate loans and construction real estate loans.

Under our loan risk rating system, each loan, with the exception of those included in large groups of smaller-balance homogeneous consumer related loans, is risk rated between one and nine by the originating loan officer, Senior Credit Management, Loan Review or any loan committee. Loans rated "one" represent those loans least likely to default and a loan rated "nine" represents a loss. The probability of loans defaulting for each risk rating, sometimes referred to as default factors, are estimated based on the frequency with which loans migrate from one risk rating to another and to default status over time. We use a loan loss reserve model that incorporates the migration of loan risk ratings and historical default data over a multi-year period to develop our estimated default factors (EDFs). The model tracks annual loan rating migrations by loan type and currently uses loan risk

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rating migrations for 15 years. The migration data is adjusted by using average losses for an economic cycle (approximately 14 years) to develop EDFs by loan type, risk rating and maturity. EDFs are updated annually in December.

EDFs are multiplied by individual loan balances in each risk-rating category and again multiplied by an historical loss given default estimate for each loan type (which incorporates estimated recoveries) to determine the appropriate allowance by loan type. This approach is applied to the commercial, lease, commercial real estate, and construction real estate components of the portfolio.

To account for current economic conditions, the general allowance for loan and lease losses (ALLL) also includes adjustments for macroeconomic factors. Macroeconomic factors adjust the ALLL upward or downward based on the current point in the economic cycle using predictive economic data and are applied to the loan loss model through a separate allowance element for the commercial, commercial real estate, construction real estate and lease loan components. To determine our macroeconomic factors, we use specific economic data that has shown to be a statistically reliable predictor of our credit losses relative to our long term average credit losses. We tested over 20 economic variables (U.S. manufacturing index, unemployment rate, U.S. GDP growth, etc.). We annually review this data to determine that such a relationship continues to exist. We currently use the following macroeconomic indicators in our macroeconomic factor computation:

Commercial loans and lease loans:  total industry capacity utilization, our prior period charge-off rates and the yield on BBB-rated debt.

Commercial real estate loans and construction loans:  M2 Money stock, our prior period charge-off rates, the U.S. commercial real estate index and the contribution of the commercial mortgage-backed security spread to the Cleveland Financial Stress Index.

Using the indicators noted above, a predicted charge-off percentage is calculated. The predicted charge-off percentage is then compared to the cycle average charge-off percentage, and a macroeconomic adjustment factor is calculated. The macroeconomic adjustment factor is applied to each commercial loan type. Each year, we review the predictive nature of the macroeconomic factors by comparing actual charge-offs to the predicted model charge-offs, re-run our regression analysis and re-calibrate the macroeconomic factors as appropriate.

The commercial related general loss reserve was $112.7 million as of September 30, 2016 and $94.2 million as of December 31, 2015. The increase in the commercial related general loss reserve was due to the overall growth in the loan portfolio. Reserves on impaired commercial related loans are included in the “Commercial Related Specific Reserves” section below. 

Commercial Related Specific Reserves.  Our allowance for loan and lease losses also includes specific reserves on impaired commercial loans. A loan is considered to be impaired when management believes, after considering collection efforts and other factors, the borrower's financial condition is such that the collection of all contractual principal and interest payments due is doubtful.

At each quarter-end, impaired commercial loans are reviewed individually, with adjustments made to the general calculated reserve for each loan as deemed necessary. Specific adjustments are made depending on expected cash flows and/or the value of the collateral securing each loan. Generally, the Company obtains a current external appraisal (within 12 months) on real estate secured impaired loans. Our appraisal policy is designed to comply with the Interagency Appraisal and Evaluation Guidelines, most recently updated in December 2010. As part of our compliance with these guidelines, we maintain an internal Appraisal Review Department that engages and reviews all third party appraisals.

In addition, each impaired commercial loan with real estate collateral is reviewed quarterly by our appraisal department to determine whether the most recent valuation remains appropriate during subsequent quarters until the next appraisal is received. If considered necessary by our appraisal department, the appraised value may be further discounted to reflect current values.

Other valuation techniques are also used to value non-real estate assets. Discounts may be applied in the impairment analysis used for general business assets (GBA). Examples of GBA include accounts receivable, inventory, and any marketable securities pledged. The discount is used to reflect collection risk in the event of default that may not have been included in the valuation of the asset.

The total commercial related specific reserves component of the allowance was $9.7 million as of September 30, 2016 compared to $16.2 million as of December 31, 2015. The decrease in commercial related specific reserves was due to loans that paid off during the second and third quarters of 2016.

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Consumer Related Reserves.  Pools of homogenous loans with similar risk and loss characteristics are also assessed for probable losses. These loan pools include consumer, residential real estate, home equity, credit cards and indirect vehicle loans. Migration probabilities obtained from past due roll rate analyses and historical loss rates are applied to current balances to forecast charge-offs over a one-year time horizon. The reserves for consumer related loans totaled $17.2 million at September 30, 2016 and $17.8 million at December 31, 2015.

For loans acquired through bank mergers, the provision for credit losses for non-purchased credit impaired ("non-PCI") loans, as accounted for in accordance with ASC 310-20, is calculated using a process similar to the one used for the MBFI legacy portfolio. A general loan loss reserve is calculated for the bank merger loans renewed and non-renewed loans separately using the same loan loss reserve model used for MBFI legacy loans. The general loan loss reserve is calculated for the four categories of commercial-related loans in our portfolio: commercial loans, commercial loans collateralized by the assignment of lease payments (lease loans), commercial real estate loans and construction real estate loans. The probability of loans defaulting for each risk rating (referred to as default factors) is estimated based on the frequency with which loans migrate from one risk rating to another and to default status over time. The default factors are multiplied by individual loan balances in each risk rating category and again multiplied by an historical loss given default estimate for each loan type to determine the appropriate allowance. The bank merger loans are risk rated using the MBFI rating methodology. The general loan loss reserve amount is adjusted upward to reflect uncertainty regarding the performance of the acquired portfolios due to our limited history with the borrowers.

For bank merger non-PCI loans that renewed during the period (quarter or year to date), the default factors are multiplied by the loan balance and loss given default estimate to calculate the required reserves. The amount of required reserves is recognized as a provision for credit losses in the statement of operations. For bank merger non-PCI loans that were not renewed subsequent to the merger consummation, the default factors are multiplied by the loan balance and the historical loss given default estimate. The resulting general loan loss reserve is compared to the remaining acquisition accounting discounts related to credit on the non-PCI loans, with the excess to be recognized as a provision for credit losses in the statement of operations.

We recorded a negative provision for credit losses of $377 thousand for acquired loans related to the non-PCI bank merger loans for the nine months endedSeptember 30, 2016 primarily due to the reduction in specific reserves. No additional provisions were recorded on the purchased credit impaired bank merger loans accounted for in accordance with ASC 310-30.

We consistently apply our methodology for determining the appropriateness of the allowance for loan and lease losses but may adjust our methodologies and assumptions based on historical information related to charge-offs and management's evaluation of the loan portfolio. In this regard, we periodically review the following to validate our allowance for loan and lease losses: historical net charge-offs as they relate to prior periods' allowance for loan and lease losses, comparison of historical loan migration in past years compared to the current year, overall credit trends and ratios and any significant changes in loan concentrations. In reviewing this data, we adjust qualitative factors within our allowance methodology to appropriately reflect any changes warranted by the validation process. Management believes it has established an allowance for probable loan losses as appropriate under GAAP.

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The following table presents an analysis of the allowance for loan and lease losses for the periods presented (dollars in thousands):

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2016			2015			2016			2015
Balance at beginning of period	$	138,333		$	124,130		$	131,508		$	114,057
Provision for credit losses	6,549			5,358			16,941			14,628
Charge-offs:
Commercial loans	1,341			1,657			2,126			2,283
Commercial loans collateralized by assignment of lease payments	367			1,980			3,288			2,080
Commercial real estate	529			170			2,601			2,312
Construction real estate	7			5			151			11
Residential real estate	290			292			1,134			1,189
Home equity	376			358			1,233			1,078
Indirect vehicles	838			581			2,420			2,082
Other consumer loans	409			467			1,216			1,391
Total charge-offs	4,157			5,510			14,169			12,426
Recoveries:
Commercial loans	665			456			1,997			1,514
Commercial loans collateralized by assignment of lease payments	3			11			520			1,100
Commercial real estate	324			2,402			2,761			6,338
Construction real estate	50			216			94			253
Residential real estate	45			337			151			417
Home equity	65			186			576			447
Indirect vehicles	436			334			1,400			1,354
Other consumer loans	86			118			620			356
Total recoveries	1,674			4,060			8,119			11,779
Net charge-offs	2,483			1,450			6,050			647
Allowance for credit losses	142,399			128,038			142,399			128,038
Allowance for unfunded credit commitments	(2,871		)	(3,412		)	(2,871		)	(3,412		)
Allowance for loan and lease losses	$	139,528		$	124,626		$	139,528		$	124,626
Total loans	$	12,540,696		$	9,389,181		$	12,540,696		$	9,389,181
Ratio of allowance to total loans	1.11		%	1.33		%	1.11		%	1.33		%
Ratio of net charge-offs to average loans	0.09			0.06			0.08			0.01

Net charge-offs of $6.1 million were recorded in the nine months endedSeptember 30, 2016 compared to net charge-offs of $647 thousand in the nine months endedSeptember 30, 2015. A provision for credit losses of $16.9 million was recorded for the nine months endedSeptember 30, 2016 compared to $14.6 million for the nine months endedSeptember 30, 2015.

The provision for credit losses for the nine months endedSeptember 30, 2016 included a provision for credit losses of $17.3 million for the legacy MB Financial portfolio and a negative provision for credit losses of $377 thousand related to the bank merger acquired loan portfolio for loan renewals subsequent to the acquisition date. In addition, included in the table above are net recoveries for the acquired Taylor Capital loans of $1.3 million for the nine months endedSeptember 30, 2016.

Additions to the allowance for loan and lease losses, which are charged to earnings through the provision for credit losses, are determined based on a variety of factors, including specific reserves, current loan risk ratings, delinquent loans, historical loss experience and economic conditions in our market area. In addition, federal regulatory authorities, as part of the examination process, periodically review our allowance for loan and lease losses. The regulators may require us to record adjustments to the allowance level based upon their assessment of the information available to them at the time of examination. Although management believes the allowance for loan and lease losses is sufficient to cover probable losses inherent in the loan portfolio, there can be no assurance that the allowance will prove sufficient to cover actual loan losses.

We utilize an internal asset classification system as a means of reporting problem and potential problem assets. At scheduled meetings of the board of directors of MB Financial Bank, a watch list is presented, showing significant loan relationships listed as “Special Mention,” “Substandard,” and “Doubtful.” An asset is classified Substandard if it is inadequately protected by the current net worth and paying capacity of the obligor or the collateral pledged, if any. Substandard assets include those

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characterized by the distinct possibility that we will sustain some loss if the deficiencies are not corrected. Assets classified as Doubtful have all the weaknesses inherent in those classified Substandard with the added characteristic that the weaknesses present make collection or liquidation in full, on the basis of currently existing facts, conditions and values, highly questionable and improbable. Assets classified as Loss are those considered uncollectible and viewed as valueless assets and have been charged-off. Assets that do not currently expose us to sufficient risk to warrant classification in one of the aforementioned categories, but possess weaknesses that deserve management's close attention are deemed to be Special Mention.

Our determination as to the classification of our assets and the amount of our valuation allowances is subject to review by the Office of the Comptroller of the Currency, MB Financial Bank's primary regulator, which can order the establishment of additional general or specific loss allowances. There can be no assurance that regulators, in reviewing our loan portfolio, will not request us to materially adjust our allowance for loan and lease losses. The Office of the Comptroller of the Currency, in conjunction with the other federal banking agencies, has adopted an interagency policy statement on the allowance for loan and lease losses. The policy statement provides guidance for financial institutions on both the responsibilities of management for the assessment and establishment of adequate allowances and guidance for banking agency examiners to use in determining the adequacy of general valuation guidelines. Generally, the policy statement recommends that (1) institutions have effective systems and controls to identify, monitor and address asset quality problems; (2) management has analyzed all significant factors that affect the collectability of the portfolio in a reasonable manner; and (3) management has established acceptable allowance evaluation processes that meet the objectives set forth in the policy statement. We analyze our process regularly, with modifications made if needed, and report those results four times per year at meetings of our board of directors. However, there can be no assurance that regulators, in reviewing our loan portfolio, will not request us to materially adjust our allowance for loan and lease losses at the time of their examination.

Although management believes that appropriate specific and general loan loss allowances have been established, actual losses are dependent upon future events and, as such, further additions to the level of specific and general loan and lease loss allowances may become necessary.

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Lease Investments

The lease portfolio is comprised of various types of equipment, generally technology related, healthcare, material handling and general manufacturing equipment. 

Lease investments by categories follow (in thousands):

	September 30, 2016			December 31, 2015			September 30, 2015
Direct finance leases:
Minimum lease payments	$	382,032		$	392,901		$	345,344
Estimated unguaranteed residual values	76,197			74,411			68,297
Less: unearned income	(32,707		)	(34,675		)	(30,300		)
Direct finance leases (1)	$	425,522		$	432,637		$	383,341
Leveraged leases:
Minimum lease payments	$	1,101		$	3,286		$	4,610
Estimated unguaranteed residual values	118			523			845
Less: unearned income	(37		)	(126		)	(187		)
Less: related non-recourse debt	(1,075		)	(3,199		)	(4,482		)
Leveraged leases (1)	$	107		$	484		$	786
Operating leases:
Equipment, at cost	$	403,525		$	318,843		$	290,786
Less accumulated depreciation	(125,878		)	(107,156		)	(106,563		)
Lease investments, net	$	277,647		$	211,687		$	184,223

⁽¹⁾  Direct finance and leveraged leases are included as commercial loans collateralized by assignment of lease payments for financial statement purposes.

Leases that transfer substantially all of the benefits and risk related to the equipment ownership are classified as direct finance leases. If these direct finance leases have non-recourse debt associated with them and meet the additional requirements for a leveraged lease, they are further classified as leverage leases, and the associated debt is netted with the outstanding balance in the consolidated financial statements. Interest income on direct finance and leveraged leases is recognized using methods which approximate a level yield over the term of the lease. Operating leases are investments in equipment leased to other companies, where the residual component makes up more than 10% of the investment.  The Company funds most of the lease equipment purchases internally, but has some loans at other banks which totaled $66.5 million at September 30, 2016, $55.0 million at December 31, 2015 and $49.8 million at September 30, 2015.

At September 30, 2016, the following reflects the residual values for leases by category in the year the initial lease term ends (in thousands):

	Residual Values
	Direct
End of initial lease term	Finance		Leveraged		Operating
December 31,	Leases		Leases		Leases		Total
2016	$	1,563	$	—	$	10,161	$	11,724
2017	18,645		99		9,318		28,062
2018	16,150		19		11,539		27,708
2019	16,057		—		11,569		27,626
2020	10,649		—		13,869		24,518
Thereafter	13,133		—		35,233		48,366
	$	76,197	$	118	$	91,689	$	168,004

The lease residual value represents the present value of the estimated fair value of the leased equipment at the termination of the lease. Lease residual values are generally reviewed quarterly, and any write-downs or charge-offs deemed necessary are

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recorded in the period in which they become known. To mitigate this risk of loss, we seek to diversify both the type of equipment leased and the industries in which the lessees participate. Often times, there are several individual lease schedules under one master lease. There were 4,164 leases at September 30, 2016 compared to 4,369 at December 31, 2015.  The average residual value per lease schedule was approximately $40 thousand at September 30, 2016 and $33 thousand at December 31, 2015.  The average residual value per master lease schedule was approximately $172 thousand at September 30, 2016 and $132 thousand at December 31, 2015, respectively.

Liquidity and Sources of Capital

Our cash flows are composed of three classifications: cash flows from operating activities, cash flows from investing activities, and cash flows from financing activities.

Cash flows from operating activities primarily include net income, adjusted for items in net income that did not impact cash.  Net cash flows provided by operating activities were $30.2 million for the nine months endedSeptember 30, 2016 compared to net cash flows provided by operating activities of $159.0 million for the nine months endedSeptember 30, 2015. The change was primarily due to lower net originations of loans held for sale.

Cash flows from investing activities reflects the impact of loans and investment securities acquired for the Company’s interest-earning asset portfolios, as well as cash flows from asset sales and the impact of acquisitions.  For the nine months endedSeptember 30, 2016, the Company had net cash flows used in investing activities of $606.1 million compared to net cash flows used in investing activities of $363.9 million for the nine months endedSeptember 30, 2015.  The change was primarily due to the increase in loans offset by less purchases of investment securities during the nine months endedSeptember 30, 2016. The nine months endedSeptember 30, 2015 also included a sale of mortgage servicing rights.

Cash flows from financing activities include transactions and events whereby cash is obtained from depositors, creditors or investors.  For the nine months endedSeptember 30, 2016, the Company had net cash flows provided by financing activities of $670.8 million compared to net cash flows provided by financing activities of $193.0 million for the nine months endedSeptember 30, 2015.  The change in cash flows from financing activities was primarily due to the increase in deposits and borrowings compared to the nine months endedSeptember 30, 2015.

In the event that additional short-term liquidity is needed, we have established relationships with several large and regional banks to provide short-term borrowings in the form of federal funds purchases.  While, at September 30, 2016, there were no firm lending commitments in place, management believes that we could borrow approximately $415.5 million for a short time from these banks on a collective basis.  Additionally, we are a member of Federal Home Loan Bank of Chicago ("FHLB").  As of September 30, 2016, the Company had $1.4 billion outstanding in FHLB advances, and could borrow an additional amount of approximately $1.2 billion.  As a contingency plan for significant funding needs, the Asset/Liability Committee may also consider the sale of investment securities, selling securities under agreement to repurchase, or the temporary curtailment of lending activities.  As of September 30, 2016, the Company had approximately $1.7 billion of unpledged securities, excluding securities available for pledge at the FHLB.

Our main sources of liquidity at the holding company level are dividends from MB Financial Bank and cash on hand. We also maintain a $35.0 million unsecured line of credit at the holding company level with a correspondent bank. Nothing was outstanding on the line of credit as of September 30, 2016. The line of credit is scheduled to mature on June 30, 2017. The holding company had $17.1 million in cash as of September 30, 2016.

See Notes 9 and 10 of the Financial Statements presented under Item 1 of this report for details of period end balances and other information for these various funding sources. There were no material changes outside the ordinary course of business in the Company’s contractual obligations at September 30, 2016 as compared to December 31, 2015.

MB Financial Bank is subject to various regulatory capital requirements which affect its ability to pay dividends to us.  Failure to meet minimum capital requirements can initiate certain mandatory and discretionary actions by regulators that, if undertaken, could have a direct material effect on our financial statements. The minimum ratios required for a bank to be considered “well capitalized” for regulatory purposes are a total risk-based capital ratio of 10.00%, a Tier 1 capital to risk-weighted assets ratio of 8.00%, a common equity Tier 1 capital to risk-weighted assets ratio of 6.50% and a Tier 1 capital to average assets ratio of 5.00%.   In addition, we have an internal policy which provides that dividends paid to us by MB Financial Bank cannot exceed an amount that would cause MB Financial Bank’s total risk-based capital ratio, Tier 1 capital to risk-weighted assets ratio, common equity Tier 1 capital to risk-weighted assets ratio and Tier 1 capital to average assets ratio to fall below 11%, 9%, 7.5% and 7%, respectively.  See “Item 1. Business — Supervision and Regulation” in our Annual Report on Form 10-K for the year ended December 31, 2015.

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At September 30, 2016, the Company’s total risk-based capital ratio was 11.65%, Tier 1 capital to risk-weighted assets ratio was 9.39%, common equity Tier 1 capital to risk-weighted assets ratio was 8.70% and Tier 1 capital to average asset ratio was 9.29%. At September 30, 2016, MB Financial Bank’s total risk-based capital ratio was 11.20%, Tier 1 capital to risk-weighted assets ratio was 10.30%, common equity Tier 1 capital to risk-weighted assets ratio was 10.30% and Tier 1 capital to average asset ratio was 10.28%. MB Financial Bank was categorized as “Well-Capitalized” at September 30, 2016 under the regulations of the Office of the Comptroller of the Currency.

The Company and MB Financial Bank must maintain a capital conservation buffer consisting of additional common equity Tier 1 capital greater than 2.5% of risk-weighted assets above the required minimum levels in order to avoid limitations on paying dividends, repurchasing shares, and paying discretionary bonuses.  The new capital conservation buffer requirement began phasing in on January 1, 2016 when a buffer greater than 0.625% of risk-weighted assets was required, which amount will increase each year until the buffer requirement is fully implemented on January 1, 2019. At September 30, 2016, the Company and MB Financial Bank maintained capital above the 0.625% conservation buffer that was phased in at the beginning of 2016.

Non-GAAP Financial Information

This report contains certain financial information determined by methods other than in accordance with accounting principles generally accepted in the United States of America (GAAP). These measures include net interest income on a fully tax equivalent basis, net interest margin on a fully tax equivalent basis and net interest margin on a fully tax equivalent basis excluding the effect of the acquisition accounting discount accretion on loans acquired through the bank mergers. Our management uses these non-GAAP measures, together with the related GAAP measures, in its analysis of our performance and in making business decisions. Management also uses these measures for peer comparisons. The tax equivalent adjustment to net interest income recognizes the income tax savings when comparing taxable and tax-exempt assets and assumes a 35% tax rate. Management believes that it is a standard practice in the banking industry to present net interest income and net interest margin on a fully tax equivalent basis, and accordingly believes that providing these measures may be useful for peer comparison purposes. Management also believes that presenting net interest margin on a tax equivalent basis excluding the effect of the acquisition accounting discount accretion on loans acquired through the Taylor Capital and American Chartered mergers is useful in assessing the impact of acquisition accounting on net interest margin, as the effect of loan discount accretion is expected to decrease as the acquired loans mature or roll off our balance sheet. These disclosures should not be viewed as substitutes for the results determined to be in accordance with GAAP, nor are they necessarily comparable to non-GAAP performance measures that may be presented by other companies. Reconciliations of net interest income on a fully tax equivalent basis to net interest income and net interest margin on a fully tax equivalent basis and net interest margin on a fully tax equivalent basis excluding the effect of the acquisition accounting discount accretion on loans acquired through the Taylor Capital and American Chartered mergers to net interest margin are contained in the tables under “Net Interest Margin.”

Forward-Looking Statements

When used in this Quarterly Report on Form 10-Q and in other documents filed or furnished with the Securities and Exchange Commission, in press releases or other public shareholder communications, or in oral statements made with the approval of an authorized executive officer, the words or phrases “believe,” “will,” “should,” “will likely result,” “are expected to,” “will continue,” “is anticipated,” “estimate,” “project,” “plans,” or similar expressions are intended to identify “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. You are cautioned not to place undue reliance on any forward-looking statements, which speak only as of the date made. These statements may relate to MB Financial, Inc.’s future financial performance, strategic plans or objectives, revenues or earnings projections, or other financial items. By their nature, these statements are subject to numerous uncertainties that could cause actual results to differ materially from those anticipated in the statements.

Important factors that could cause actual results to differ materially from the results anticipated or projected include, but are not limited to, the following: (1) expected revenues, cost savings, synergies and other benefits from the MB Financial-American Chartered merger might not be realized within the expected time frames or at all and costs or difficulties relating to integration matters, including but not limited to customer and employee retention, might be greater than expected; (2) the credit risks of lending activities, including changes in the level and direction of loan delinquencies and write-offs and changes in estimates of the adequacy of the allowance for loan losses, which could necessitate additional provisions for loan losses, resulting both from originated loans and loans acquired from other financial institutions; (3) competitive pressures among depository institutions; (4) interest rate movements and their impact on customer behavior, net interest margin and the value of our mortgage servicing rights; (5) the possibility that our mortgage banking business may experience increased volatility in its revenues and earnings and the possibility that the profitability of our mortgage banking business could be significantly reduced if we are unable to originate and sell mortgage loans at profitable margins or if changes in interest rates negatively impact the value of our mortgage servicing

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rights; (6) the impact of repricing and competitors’ pricing initiatives on loan and deposit products; (7) fluctuations in real estate values; (8) the ability to adapt successfully to technological changes to meet customers’ needs and developments in the market place; (9) the possibility that security measures implemented might not be sufficient to mitigate the risk of a cyber attack or cyber theft, and that such security measures might not protect against systems failures or interruptions; (10) our ability to realize the residual values of our direct finance, leveraged and operating leases; (11) our ability to access cost-effective funding; (12) changes in financial markets; (13) changes in economic conditions in general and in the Chicago metropolitan area in particular; (14) the costs, effects and outcomes of litigation; (15) new legislation or regulatory changes, including but not limited to the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010 (the “Dodd-Frank Act”) and regulations adopted thereunder, changes in capital requirements pursuant to the Dodd-Frank Act, changes in the interpretation and/or application of laws and regulations by regulatory authorities, other governmental initiatives affecting the financial services industry and changes in federal and/or state tax laws or interpretations thereof by taxing authorities; (16) changes in accounting principles, policies or guidelines; (17) our future acquisitions of other depository institutions or lines of business; and (18) future goodwill impairment due to changes in our business, changes in market conditions, or other factors.

We do not undertake any obligation to update any forward-looking statement to reflect circumstances or events that occur after the date on which the forward-looking statement is made.

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Item 3.   Quantitative and Qualitative Disclosures about Market Risk

Market Risk and Asset Liability Management

Market Risk.  Market risk is the risk that the market value or estimated fair value of our assets, liabilities, and derivative financial instruments will decline as a result of changes in interest rates or financial market volatility, or that our net income will be significantly reduced by interest rate changes.  Market risk is managed operationally in our Treasury Group and is addressed through a selection of funding and hedging instruments supporting balance sheet growth, as well as monitoring our asset investment strategies.

Asset Liability Management.  Management and our Treasury Group continually monitor our sensitivity to interest rate changes.  It is our policy to maintain an acceptable level of interest rate risk over a range of possible changes in interest rates while remaining responsive to market demand for loan and deposit products.  The strategy we employ to manage our interest rate risk is to measure our risk using an asset/liability simulation model.  The model considers several factors to determine our potential exposure to interest rate risk, including measurement of repricing gaps, duration, convexity, value at risk, and the market value of portfolio equity under assumed changes in the level of interest rates, shape of the yield curves, and general market volatility.  Management controls our interest rate exposure using several strategies, which include adjusting the maturities of securities in our investment portfolio, and limiting fixed rate loans or fixed rate deposits with terms of more than five years.  We also use derivative instruments, principally interest rate swaps, to manage our interest rate risk.  See Note 15 to the Consolidated Financial Statements.

Interest Rate Risk.  Interest rate risk can come in a variety of forms, including repricing risk, yield curve risk, basis risk, and prepayment risk.  We experience repricing risk when the change in the average yield of our interest earning assets or average rate of our interest bearing liabilities is more sensitive than the other to changes in market interest rates.  Such a change in sensitivity could reflect a number of possible mismatches in the repricing opportunities of our assets and liabilities.

In the event that yields on our assets and liabilities do adjust to changes in market rates to the same extent, we may still be exposed to yield curve risk.  Yield curve risk reflects the possibility the changes in the shape of the yield curve could have different effects on our assets and liabilities.

Variable rate assets and liabilities that reprice at similar times, have similar maturities or repricing dates, are based on different indexes still have interest rate risk.  Basis risk reflects the possibility that indexes will not move in a coordinated manner.

We hold mortgage-related investments, including mortgage loans and mortgage-backed securities.  Prepayment risk is associated with mortgage-related investments and results from homeowners’ ability to pay off their mortgage loans prior to maturity.  We limit this risk by restricting the types of mortgage-backed securities we own to those with limited average life changes under certain interest-rate shock scenarios, or securities with embedded prepayment penalties.

Measuring Interest Rate Risk.  As noted above, interest rate risk can be measured by analyzing the extent to which the repricing of assets and liabilities are mismatched to create an interest sensitivity gap.  An asset or liability is said to be interest rate sensitive within a specific period if it will mature or reprice within that period.  The interest rate sensitivity gap is defined as the difference between the amount of interest earning assets maturing or repricing within a specific time period and the amount of interest bearing liabilities maturing or repricing within that same time period.  A gap is considered positive when the amount of interest rate sensitive assets exceeds the amount of interest rate sensitive liabilities.  A gap is considered negative when the amount of interest rate sensitive liabilities exceeds the amount of interest rate sensitive assets.  During a period of rising interest rates, therefore, a positive gap would tend to positively affect net interest income.  Conversely, during a period of falling interest rates, a positive gap position would tend to result in a decrease in net interest income.

The following table sets forth the amounts of interest earning assets and interest bearing liabilities outstanding at September 30, 2016 that we anticipate, based upon certain assumptions, to reprice or mature in each of the future time periods shown.  Except as stated below, the amount of assets and liabilities shown which reprice or mature during a particular period were determined based on the earlier of the term to repricing or the term to repayment of the asset or liability. 

The table is intended to provide an approximation of the projected repricing of assets and liabilities at September 30, 2016 based on contractual maturities and scheduled rate adjustments within a three-month period and subsequent selected time intervals.  The loan amounts in the table reflect principal balances expected to be reinvested and/or repriced because of contractual amortization and rate adjustments on adjustable-rate loans.  Loan and investment securities’ contractual maturities and amortization reflect expected prepayment assumptions.  While NOW, money market and savings deposit accounts have adjustable rates, it is assumed that the interest rates on some of the accounts will not adjust immediately to changes in other interest rates. Therefore,

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the information in the table is calculated assuming that NOW, money market and savings deposits will reprice as follows: 4%, 10%, and 6%, respectively, in the first three months, 11%, 26%, and 15%, respectively, in the next nine months, 52%, 58%, and 57%, respectively, from one year to five years, and 33%, 6%, and 22%, respectively over five years (dollars in thousands):

	Time to Maturity or Repricing
	0 – 90			91 - 365			1 – 5			Over 5
	Days			Days			Years			Years			Total
Interest Earning Assets:
Interest earning deposits with banks	$	122,672		$	1,663		$	915		$	—		$	125,250
Investment securities	377,222			391,334			1,626,875			725,396			3,120,827
Loans held for sale	899,412			—			—			—			899,412
Loans, including covered loans	6,209,997			2,063,254			3,978,225			289,220			12,540,696
Total interest earning assets	$	7,609,303		$	2,456,251		$	5,606,015		$	1,014,616		$	16,686,185
Interest Bearing Liabilities:
NOW, money market and interest bearing deposits	$	316,546		$	895,882		$	2,563,162		$	884,817		$	4,660,407
Savings deposits	62,880			177,258			651,954			255,808			1,147,900
Time deposits	379,663			865,653			814,871			438			2,060,625
Short-term borrowings	1,265,096			67,054			147,905			16,264			1,496,319
Long-term borrowings	248,068			20,944			40,486			2,147			311,645
Junior subordinated notes issued to capital trusts	209,159			—			—			—			209,159
Total interest bearing liabilities	$	2,481,412		$	2,026,791		$	4,218,378		$	1,159,474		$	9,886,055
Rate sensitive assets (RSA)	$	7,609,303		$	10,065,554		$	15,671,569		$	16,686,185		$	16,686,185
Rate sensitive liabilities (RSL)	2,481,412			4,508,203			8,726,581			9,886,055			9,886,055
Cumulative GAP (GAP=RSA-RSL)	5,127,891			5,557,351			6,944,988			6,800,130			6,800,130
RSA/Total assets	39.34		%	52.04		%	81.02		%	86.27		%	86.27		%
RSL/Total assets	12.83			23.31			45.12			51.11			51.11
GAP/Total assets	26.51			28.73			35.91			35.16			35.16
GAP/RSA	67.39			55.21			44.32			40.75			40.75

Certain shortcomings are inherent in the method of analysis presented in the foregoing table.  For example, although certain assets and liabilities may have similar maturities or periods to repricing, they may react in different degrees to changes in market interest rates.  Also, the interest rates on certain types of assets and liabilities may fluctuate in advance of changes in market interest rates, while interest rates on other types of assets may lag behind changes in market rates.  Additionally, in the event of a change in interest rates, prepayment and early withdrawal levels would likely deviate significantly from those assumed in calculating the table.  Therefore, we do not rely on a gap analysis to manage our interest rate risk, but rather we use what we believe to be the more reliable simulation model relating to changes in net interest income.

Based on simulation modeling which assumes gradual changes in interest rates over a one-year period, we believe that our net interest income would change due to changes in interest rates as follows (dollars in thousands):

Gradual	Changes in Net Interest Income Over One Year Horizon
Changes in	September 30, 2016					December 31, 2015
Levels of	Dollar			Percentage		Dollar			Percentage
Interest Rates	Change			Change		Change			Change
+ 2.00%	$	32,698		5.69	%	$	32,845		6.91	%
+ 1.00%	17,569			3.06		16,486			3.47
- 1.00%	(18,876		)	(3.28	)	(21,122		)	(4.44	)

In the interest rate sensitivity table above, changes in net interest income between September 30, 2016 and December 31, 2015 reflect changes in the composition of interest earning assets and interest bearing liabilities, related interest rates, repricing frequencies, and the fixed or variable characteristics of the interest earning assets and interest bearing liabilities.  The changes in net interest income incorporate the impact of loan floors as well as shifts from low cost deposits to higher cost certificates of deposit in a rising rate environment.

The assumptions used in our interest rate sensitivity simulation discussed above are inherently uncertain and, as a result, the simulations cannot precisely measure net interest income or precisely predict the impact of changes in interest rates on net

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interest income.  Our model assumes that a portion of our variable rate loans that have minimum interest rates will remain in our portfolio regardless of changes in the interest rate environment.  Actual results will differ from simulated results due to timing, magnitude and frequency of interest rate changes as well as changes in market conditions and management strategies.

Item 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures: An evaluation of our disclosure controls and procedures (as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934 (the “Act”)) was carried out as of September 30, 2016 under the supervision and with the participation of our Chief Executive Officer, Chief Financial Officer and several other members of our senior management.  Our Chief Executive Officer and Chief Financial Officer concluded that, as of September 30, 2016, our disclosure controls and procedures were effective in ensuring that the information we are required to disclose in the reports we file or submit under the Act is (i) accumulated and communicated to our management (including the Chief Executive Officer and Chief Financial Officer) to allow timely decisions regarding required disclosure, and (ii) recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms.

Changes in Internal Control Over Financial Reporting: During the quarter ended September 30, 2016, no change occurred in our internal control over financial reporting that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

We do not expect that our disclosure controls and procedures and internal control over financial reporting will prevent all error and all fraud.  A control procedure, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control procedure are met.  Because of the inherent limitations in all control procedures, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within the Company have been detected.  These inherent limitations include the realities that judgments in decision-making can be faulty and that breakdowns in controls or procedures can occur because of simple error or mistake.  Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people, or by management override of the control.  The design of any control procedure also is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions; over time, controls may become inadequate because of changes in conditions, or the degree of compliance with the policies or procedures may deteriorate.  Because of the inherent limitations in a cost-effective control procedure, misstatements due to error or fraud may occur and not be detected.

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PART II.        OTHER INFORMATION

Item 1.   Legal Proceedings

We are involved from time to time as plaintiff or defendant in various legal actions arising in the normal course of our businesses.  While the ultimate outcome of pending proceedings cannot be predicted with certainty, it is the opinion of management, after consultation with counsel representing us in such proceedings, that the resolution of these proceedings should not have a material adverse effect on our consolidated financial position or results of operation.

Item 1A.   Risk Factors

There have been no material changes to the risk factors disclosed in Item 1A. Risk Factors in our Annual Report on Form 10-K for the year ended December 31, 2015.

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

The following table sets forth information for the three months ended September 30, 2016 with respect to our repurchases of our outstanding common shares:

	Total Number of Shares Purchased (1)	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs (in Thousands)
July 1, 2016 — July 31, 2016	3,527	$	37.68	—	$	—
August 1, 2016 — August 31, 2016	30,088	39.10		—	—
September 1, 2016 — September 30, 2016	—	—		—	—
Total	33,615	$	38.95	—

⁽¹⁾  Includes shares withheld to satisfy tax withholding obligations upon the exercise of stock options and vesting of restricted stock awards.

Item 6.   Exhibits

See Exhibit Index.

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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.

MB FINANCIAL, INC.

(registrant)

Date:	November 9, 2016	By:	/s/Mitchell Feiger
			Mitchell Feiger
			President and Chief Executive Officer
			(Principal Executive Officer)
Date:	November 9, 2016	By:	/s/Randall T. Conte
			Randall T. Conte
			Vice President and Chief Financial Officer
			(Principal Financial Officer)

79

EXHIBIT INDEX
Exhibit Number	Description
2.1	Agreement and Plan of Merger, dated as of July 14, 2013, by and among the Registrant and Taylor Capital Group, Inc. (incorporated herein by reference to Exhibit 2.1 to the Registrant's Current Report on Form 8-K filed on July 18, 2013 (File No.0-24566-01))
2.2	Amendment, dated as of June 30, 3014, to Agreement and Plan of Merger, dated as of July 14, 2013, by and between the Registrant and Taylor Capital Group, Inc. (incorporated herein by reference to Exhibit 2.1 to the Registrant's Current Report on Form 8-K filed on July 1, 2014 (File No.0-24566-01))
2.3	Letter Agreement, dated as of June 30, 3014, by and between the Registrant and Taylor Capital Group, Inc. (incorporated herein by reference to Exhibit 2.2 to the Registrant's Current Report on Form 8-K filed on July 1, 2014 (File No.0-24566-01))
2.4	Agreement and Plan of Merger, dated as of May 1, 2006, by and among the Registrant, MBFI Acquisition Corp. and First Oak Brook Bancshares, Inc. (“First Oak Brook”)(incorporated herein by reference to Exhibit 2.1 to the Registrant’s Current Report on Form 8-K filed on May 2, 2006 (File No.0-24566-01))
2.5	Purchase and Assumption Agreement among Federal Deposit Insurance Corporation, Receiver of Corus Bank, National Association, Chicago, Illinois, Federal Deposit Insurance Corporation and MB Financial Bank, N.A., dated as of September 11, 2009 (incorporated herein by reference to Exhibit 2.1 to the Registrant’s Current Report on Form 8-K filed on September 17, 2010 (File No.0-24566-01))
2.6	Purchase and Assumption Agreement among Federal Deposit Insurance Corporation, Receiver of Broadway Bank, Chicago, Illinois, Federal Deposit Insurance Corporation and MB Financial Bank, N.A., dated as of April 23, 2010 (incorporated herein by reference to Exhibit 2.6 to the Registrant’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2010 (File No. 0-24566-01))
2.7	Purchase and Assumption Agreement among Federal Deposit Insurance Corporation, Receiver of New Century Bank, Chicago, Illinois, Federal Deposit Insurance Corporation and MB Financial Bank, N.A., dated as of April 23, 2010 (incorporated herein by reference to Exhibit 2.7 to the Registrant’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2010 (File No. 0-24566-01))
2.8	Agreement and Plan of Merger, dated as of November 20, 2015, by and between the Registrant and American Chartered Bancorp, Inc. (incorporated herein by reference to Exhibit 2.1 to the Registrant's Current Report on Form 8-K filed on November 24, 2015 (File No.001-36599))
3.1	Charter of the Registrant, as amended (incorporated herein by reference to Exhibit 3.1 to the Registrant’s Current Report on Form 8-K filed on August 30, 2016 (File No. 001-36599))
3.1A	Articles Supplementary to the Charter of the Registrant for the Registrant’s Perpetual Non-Cumulative Preferred Stock, Series A (incorporated herein by reference to Exhibit 3.3 to the Registrant’s Registration Statement on Form 8-A filed on August 14, 2014 (File No.001-36599))
3.1B	Articles Supplementary to the Charter of the Registrant for the Registrant’s Cumulative Voting Convertible Preferred Stock, Series B (incorporated herein by reference to Exhibit 3.2 to the Registrant’s Current Report on Form 8-K filed on August 30, 2016 (File No.001-36599))
3.2	Bylaws of the Registrant, as amended (incorporated herein by reference to Exhibit 3.1 to the Registrant’s Current Report on Form 8-K filed on March 2, 2015 (File No. 001-36599))

80

EXHIBIT INDEX
Exhibit Number	Description
4.1	The Registrant hereby agrees to furnish to the Commission, upon request, the instruments defining the rights of the holders of each issue of long-term debt of the Registrant and its consolidated subsidiaries
10.1	Reserved
10.2	Amended and Restated Employment Agreement between the Registrant and Mitchell Feiger (incorporated herein by reference to Exhibit 10.2 to the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2008 (File No. 0-24566-01))
10.4	Form of Change and Control Severance Agreement between MB Financial Bank, National Association and Jill E. York (incorporated herein by reference to Exhibit 10.4 to the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2008 (File No. 0-24566-01))
10.4B	Form of Change and Control Severance Agreement between MB Financial Bank, National Association and each of Brian Wildman and Rosemarie Bouman (incorporated herein by reference to Exhibit 10.4B to the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2008 (File No. 0-24566-01))
10.4C	Form of Change in Control Severance Agreement between MB Financial Bank, National Association and Mark A. Heckler (incorporated herein by reference to Exhibit 10.4C to the Registrant’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2011 (File No. 0-24566-01))
10.4D	Form of Change in Control Severance Agreement between MB Financial Bank, National Association and Randall T. Conte (incorporated herein by reference to Exhibit 10.4D to the Registrant’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2014 (File No. 001-36599))
10.5	Reserved
10.5A	Reserved
10.5B	Reserved
10.7	MB Financial, Inc. Third Amended and Restated Omnibus Incentive Plan (the “Omnibus Incentive Plan”) (incorporated herein by reference to Appendix A to the Registrant’s definitive proxy statement filed on April 11, 2014 (File No. 0-24566-01))
10.7	MB Financial, Inc. Third Amended and Restated Omnibus Incentive Plan (the “Omnibus Incentive Plan”) (incorporated herein by reference to Appendix A to the Registrant’s definitive proxy statement filed on April 11, 2014 (File No. 0-24566-01))

81

EXHIBIT INDEX
Exhibit Number	Description
10.8	MB Financial Stock Deferred Compensation Plan (incorporated herein by reference to Exhibit 10.8 to the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2008 (File No. 0-24566-01))
10.9	MB Financial Non-Stock Deferred Compensation Plan (incorporated herein by reference to Exhibit 10.9 to the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2008 (File No. 0-24566-01))
10.10	Avondale Federal Savings Bank Supplemental Executive Retirement Plan Agreement (incorporated herein by reference to Exhibit 10.2 to the Annual Report on Form 10-K of MB Financial, Inc., a Delaware corporation (then known as Avondale Financial Corp.) for the year ended December 31, 1996 (File No. 0-24566))
10.11	Agreement Regarding Salary Adjustment and Portion of Salary Payable by Stock, dated as of December 21, 2009, between MB Financial, Inc. and Mitchell Feiger (incorporated herein by reference to Exhibit 10.11 to the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2009 (File No. 0-24566-01))
10.11A	Form of Agreement Regarding Salary Adjustment and Portion of Salary Payable by Stock between MB Financial, Inc. and Rosemarie Bouman, Mark A. Heckler and Brian J. Wildman (incorporated herein by reference to Exhibit 10.11A to the Registrant’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2011 (File No. 0-24566-01))
10.12	Agreement Regarding Salary Adjustment and Portion of Salary Payable by Stock, dated as of December 21, 2009, between MB Financial, Inc. and Jill E. York (incorporated herein by reference to Exhibit 10.12 to the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2009 (File No. 0-24566-01))
10.13	Amended and Restated Employment Agreement between MB Financial Bank, N.A. and Ronald D. Santo (incorporated herein by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed on December 14, 2004 (File No. 0-24566-01))
10.13A	Amendment to Amended and Restated Employment Agreement between MB Financial Bank, N.A. and Ronald D. Santo ((incorporated herein by reference to Exhibit 10.13A to the Registrant’s Annual Report on Form 10-K/A for the year ended December 31, 2006, filed on March 2, 2007 (File No. 0-24566-01))
10.15	Tax Gross Up Agreements between the Registrant and each of Mitchell Feiger, Jill E. York and Brian Wildman (incorporated herein by reference to Exhibit 10.15 to the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2008 (File No. 0-24566-01))
10.15A	Tax Gross Up Agreement between the Registrant and Rosemarie Bouman (incorporated herein by reference to Exhibit 10.15A to the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2008 (File No. 0-24566-01))
10.16	Form of Incentive Stock Option Agreement for Executive Officers under the Omnibus Incentive Plan (incorporated herein by reference to Exhibit 10.16 to the Registrant’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2007 (File No. 0-24566-01))

82

EXHIBIT INDEX
Exhibit Number	Description
10.17	Form of Non-Qualified Stock Option Agreement for Directors under the Omnibus Incentive Plan (incorporated herein by reference to Exhibit 10.16 to the Registrant’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2007 (File No. 0-24566-01))
10.18	Form of Restricted Stock Agreement for Executive Officers under the Omnibus Incentive Plan (incorporated herein by reference to Exhibit 10.16 to the Registrant’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2007 (File No. 0-24566-01))
10.18A	Amendment to Form of Incentive Stock Option Agreement and Form of Restricted Stock Agreement for Executive Officers under the Omnibus Incentive Plan (incorporated herein by reference to Exhibit 10.18A to the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2008 (File No. 0-24566-01))
10.18B	Form of Performance-Based Restricted Stock Agreement for Executive Officers under the Omnibus Incentive Plan (incorporated herein by reference to Exhibit 10.18B to the Registrant’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2009 (File No. 0-24566-01))
10.18C	Form of Restricted Stock Agreement for grants on December 2, 2009 to Mitchell Feiger and Jill E. York (incorporated herein by reference to Exhibit 10.18C to the Registrant’s Current Report on Form 8-K filed on December 7, 2009 (File No. 0-24566-01))
10.19	Form of Restricted Stock Agreement for Directors under the Omnibus Incentive Plan (incorporated herein by reference to Exhibit 10.16 to the Registrant’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2007 (File No. 0-24566-01))
10.20	First Oak Brook Bancshares, Inc. Incentive Compensation Plan (incorporated herein by reference to Appendix A to the definitive proxy statement filed by First Oak Brook on March 30, 2004 (File No. 0-14468))
10.20A	Amendment to First Oak Brook Bancshares, Inc. Incentive Compensation Plan ((incorporated herein by reference to Exhibit 10.20A to the Registrant’s Annual Report on Form 10-K/A for the year ended December 31, 2006, filed on March 2, 2007 (File No. 0-24566-01))
10.21	First Oak Brook Bancshares, Inc. 2001 Stock Incentive Plan (incorporated herein by reference to Appendix A to the definitive proxy statement filed by First Oak Brook on April 2, 2001 (File No. 0-14468))
10.21A	Amendment to First Oak Brook Bancshares, Inc. 2001 Stock Incentive Plan ((incorporated herein by reference to Exhibit 10.21A to the Registrant’s Annual Report on Form 10-K/A for the year ended December 31, 2006, filed on March 2, 2007 (File No. 0-24566-01))
10.22	First Oak Brook Bancshares, Inc. Directors Stock Plan (incorporated herein by reference to Exhibit 4.1 to the Registration Statement on Form S-8 filed by First Oak Brook on October 25, 1999 (File No. 333-89647))
10.22A	Amendment to First Oak Brook Bancshares, Inc. Directors Stock Plan (incorporated herein by reference to Exhibit 10.22A to the Registrant’s Quarterly Report on Form 10-Q/A for the quarter ended March 31, 2007 filed on May 15, 2007 (File No. 0-24566-01))
10.23	Letter Agreement, dated as of June 30, 2014, by and among the Registrant and certain principal stockholders of Taylor Capital Group, Inc. (incorporated herein by reference to Exhibit 10.1 to the Registrant's Current Report on Form 8-K filed on July 1, 2014 (File No.0-24566-01))

83

EXHIBIT INDEX
Exhibit Number	Description
10.23A	Supplemental Agreement, dated as of August 15, 2014, by and among the Registrant, MB Financial Bank, N.A., and Jennifer W. Steans, as representative of certain principal stockholders of Taylor Capital Group, Inc. (incorporated herein by reference to Exhibit 10.2 to the Registrant's Current Report on Form 8-K filed on August 20, 2014 (File No.001-36599))
10.23B	Escrow Agreement, dated as of August 15, 2014, by and among MB Financial Bank, N.A., Jennifer W. Steans, as representative of certain principal stockholders of Taylor Capital Group, Inc., and The Northern Trust Company, as escrow agent (incorporated herein by reference to Exhibit 10.2 to the Registrant's Current Report on Form 8-K filed on August 20, 2014 (File No.001-36599))
10.24	Employment Agreement, dated as of July 14, 2013 by and between the Registrant, MB Financial Bank, N.A. and Mark A. Hoppe (included as Exhibit E to the Agreement and Plan of Merger, dated as of July 14, 2013, by and between the Registrant and Taylor Capital Group, Inc. (incorporated herein by reference to Exhibit 2.1 to the Registrant's Current Report on Form 8-K filed on July 18, 2013 (File No.0-24566-01)))
10.25	Taylor Capital Group, Inc. Deferred Compensation Plan (incorporated herein by reference to Exhibit 10.1 to the Annual Report on Form 10-K of Taylor Capital Group, Inc. for the year ended December 31, 2008 (File No. 000-50034))
10.25A	Trust Under Taylor Capital Group, Inc. Deferred Compensation Plan (incorporated herein by reference to Exhibit 10.17 of the Registration Statement on Form S-1 of Taylor Capital Group, Inc. filed May 24, 2002 (Registration No. 333-89158))
10.25B	Amendment to the Taylor Capital Group, Inc. Deferred Compensation Plan (incorporated herein by reference to Exhibit 10.25B to the Registrant’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2014 (File No. 001-36599))
10.26	Taylor Capital Group, Inc. Senior Officer Change in Control Severance Plan (incorporated herein by reference to Exhibit 10.1 of the Quarterly Report on Form 10-Q of Taylor Capital Group, Inc. for the quarterly period ended June 30, 2009 (File No. 000-50034))
10.26A	Amendment to the Taylor Capital Group, Inc. Senior Officer Change in Control Severance Plan (incorporated herein by reference to Exhibit 10.26A to the Registrant’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2014 (File No. 001-36599))
10.27	First Oak Brook Bancshares, Inc. Executive Deferred Compensation Plan (incorporated by reference to Exhibit 10.3 to First Oak Brook’s Annual Report on Form 10-K for the year ended December 31, 1997 (File No. 0-14468))
10.27A	Amendment to First Oak Brook Bancshares, Inc. Executive Deferred Compensation Plan (incorporated herein by reference to Exhibit 10.27A to the Registrant’s Quarterly Report on Form 10-Q/A for the quarter ended March 31, 2007 filed on May 15, 2007)
10.29	Form of Transitional Employment Agreement between the Registrant (as successor to First Oak Brook) and Rosemarie Bouman (incorporated herein by reference to Exhibit 10.10 to First Oak Brook’s Annual Report on Form 10-K for the year ended December 31, 1998 (File No. 0-14468))
10.29A	First Amendment to Transitional Employment Agreement between the Registrant (as successor to First Oak Brook) and Rosemarie Bouman ((incorporated herein by reference to Exhibit 10.28A to the Registrant’s Annual Report on Form 10-K/A for the year ended December 31, 2006, filed March 2, 2007 (File No. 0-24566-01))

84

EXHIBIT INDEX
Exhibit Number	Description
10.29B	Second Amendment to Transitional Employment Agreement between the Registrant (as successor to First Oak Brook) and Rosemarie Bouman ((incorporated herein by reference to Exhibit 10.28B to the Registrant’s Annual Report on Form 10-K/A for the year ended December 31, 2006, filed March 2, 2007 (File No. 0-24566-01))
10.30	Form of Performance Share Unit Award Agreement (incorporated herein by reference to Exhibit 10.30 to the Registrant's Current Report on Form 8-K filed on September 5, 2012 (File No. 0-24566-01))
10.31	Form of Incentive Stock Option Agreement (Management Committee) (incorporated herein by reference to Exhibit 10.31 to the Registrant's Current Report on Form 8-K filed on September 5, 2012 (File No. 0-24566-01))
10.32	Form of Restricted Stock Agreement (Management Committee) (incorporated herein by reference to Exhibit 10.32 to the Registrant's Current Report on Form 8-K filed on September 5, 2012 (File No. 0-24566-01))
10.32A	Form of Restricted Stock Unit Agreement (Management Committee) (incorporated herein by reference to Exhibit 10.32A to the Registrant's Current Report on Form 8-K filed on September 5, 2012 (File No. 0-24566-01))
31.1	Rule 13a — 14(a)/15d — 14(a) Certification (Chief Executive Officer)*
31.2	Rule 13a — 14(a)/15d — 14(a) Certification (Chief Financial Officer)*
32	Section 1350 Certifications*
101	The following financial statements from the MB Financial, Inc. Quarterly Report on Form 10-Q for the quarter ended September 30, 2016, formatted in Extensive Business Reporting Language (XBRL): (i) consolidated balance sheets, (ii) consolidated statements of operations, (iii) consolidated statements of comprehensive income, (iv) consolidated statements of cash flows and (v) the notes to consolidated financial statements*

*  Filed herewith

85

EX-31.1

EXHIBIT 31.1

CERTIFICATION 

I, Mitchell Feiger, certify that: 

1.           I have reviewed this Quarterly Report on Form 10-Q of MB Financial, Inc.; 

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 accounting 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 (the registrant’s fourth fiscal quarter in the case of an annual report) 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, 2016

/s/ Mitchell Feiger

Mitchell Feiger

President and Chief Executive Officer 

EX-31.2

EXHIBIT 31.2

CERTIFICATION

I, Randall T. Conte, certify that: 

 1.           I have reviewed this Quarterly Report on Form 10-Q of MB Financial, Inc.; 

 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 accounting 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 (the registrant’s fourth fiscal quarter in the case of an annual report) 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, 2016

/s/ Randall T. Conte

Randall T. Conte

Vice President and Chief Financial Officer 

EX-32

EXHIBIT 32

CERTIFICATION

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, each of the undersigned hereby certifies in his or her capacity as an officer of MB Financial, Inc. (the Company) that the Quarterly Report of the Company on Form 10-Q for the quarter ended September 30, 2016 fully complies with the requirements of Section 13(a) of the Securities Exchange Act of 1934 and that the information contained in such report fairly presents, in all material respects, the financial condition and results of operations of the Company as of the dates and for the periods presented in the financial statements included in such report.

Date:	November 9, 2016	/s/Mitchell Feiger
		Mitchell Feiger
		President and Chief Executive Officer
Date:	November 9, 2016	/s/Randall T. Conte
		Randall T. Conte
		Vice President and Chief Financial Officer

XML

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2016	Nov. 09, 2016
Document and Entity Information
Entity Registrant Name	MB FINANCIAL INC /MD
Entity Central Index Key	0001139812
Document Type	10-Q
Document Period End Date	Sep. 30, 2016
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		83,577,088
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q3

XML

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
ASSETS
Cash and due from banks	$ 351,009	$ 307,869
Interest earning deposits with banks	125,250	73,572
Total cash and cash equivalents	476,259	381,441
Investment securities:
Securities available for sale, at fair value	1,859,356	1,585,023
Securities held to maturity, at amortized cost ($1,175,838 fair value at September 30, 2016 and $1,274,767 at December 31, 2015)	1,115,262	1,230,810
Non-marketable securities - FHLB and FRB stock	146,209	114,233
Total investment securities	3,120,827	2,930,066
Loans held for sale	899,412	744,727
Loans:
Total loans, excluding purchased credit impaired loans	12,379,358	9,652,592
Purchased credit impaired loans	161,338	141,406
Total loans	12,540,696	9,793,998
Less: Allowance for loan and lease losses	139,528	128,140
Net loans	12,401,168	9,665,858
Lease investments, net	277,647	211,687
Premises and equipment, net	283,112	236,013
Cash surrender value of life insurance	199,628	136,953
Goodwill	993,799	725,070
Other intangibles	65,395	44,812
Mortgage servicing rights, at fair value	154,730	168,162
Other real estate owned, net	33,105	31,553
Other real estate owned related to FDIC-assisted transactions	5,177	10,717
Other assets	431,623	297,948
Total assets	19,341,882	15,585,007
Deposits:
Non-interest bearing	6,410,334	4,627,184
Interest bearing	7,868,932	6,878,031
Total deposits	14,279,266	11,505,215
Short-term borrowings	1,496,319	1,005,737
Long-term borrowings	311,645	400,274
Junior subordinated notes issued to capital trusts	209,159	186,164
Accrued expenses and other liabilities	482,085	400,333
Total liabilities	16,778,474	13,497,723
STOCKHOLDERS’ EQUITY
Preferred stock, ($0.01 par value, authorized 10,000,000 shares at September 30, 2016 and December 31, 2015; Series A, 8% perpetual non-cumulative, 4,000,000 shares issued and outstanding at September 30, 2016 and December 31, 2015, $25 liquidation value; Series B, 8% cumulative voting convertible, 525 shares issued and outstanding at September 30, 2016 and none issued and outstanding at December 31, 2015)	116,507	115,280
Common stock, ($0.01 par value; authorized 120,000,000 shares at September 30, 2016 and 100,000,000 shares at December 31, 2015; issued 85,547,217 shares at September 30, 2016 and 75,566,885 shares at December 31, 2015)	855	756
Additional paid-in capital	1,674,341	1,280,870
Retained earnings	809,769	731,812
Accumulated other comprehensive income	23,763	15,777
Less: 1,991,960 and 1,888,556 shares of treasury common stock, at cost, at September 30, 2016 and December 31, 2015, respectively	(62,084)	(58,504)
Controlling interest stockholders’ equity	2,563,151	2,085,991
Non-controlling interest	257	1,293
Total stockholders’ equity	2,563,408	2,087,284
Total liabilities and stockholders’ equity	$ 19,341,882	$ 15,585,007

XML

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Securities held to maturity, at amortized cost, fair value	$ 1,175,838	$ 1,274,767
Preferred stock, par or stated value per share (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized shares	120,000,000	100,000,000
Common stock, issued shares	85,547,217	75,566,885
Treasury stock, shares	1,991,960	1,888,556
Series A Preferred Stock
Preferred stock, dividend rate (percent)	8.00%	8.00%
Preferred stock, shares issued	4,000,000	4,000,000
Preferred stock, shares outstanding	4,000,000	4,000,000
Preferred stock, liquidation preference per share (in dollars per share)	$ 25	$ 25
Series B Preferred Stock
Preferred stock, dividend rate (percent)	8.00%
Preferred stock, shares issued	525	0
Preferred stock, shares outstanding	525	0

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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2016		Sep. 30, 2015		Sep. 30, 2016	Sep. 30, 2015
Loans:
Taxable	$ 118,675		$ 100,573		$ 333,829	$ 298,187
Nontaxable	2,846		2,283		8,173	6,716
Investment securities:
Taxable	8,844		9,655		26,209	29,591
Nontaxable	10,382		10,752		31,802	30,005
Other interest earning accounts	164		89		430	208
Total interest income	140,911		123,352		400,443	364,707
Interest expense:
Deposits	6,681		5,102		18,255	14,301
Short-term borrowings	1,092		395		2,723	1,027
Long-term borrowings and junior subordinated notes	2,367		1,886		6,788	5,542
Total interest expense	10,140		7,383		27,766	20,870
Net interest income	130,771		115,969		372,677	343,837
Provision for credit losses	6,549		5,358		16,941	14,628
Net interest income after provision for credit losses	124,222		110,611		355,736	329,209
Non-interest income:
Mortgage banking revenue	49,095		30,692		116,192	90,884
Lease financing revenue, net	18,864		20,000		53,618	60,644
Commercial deposit and treasury management fees	12,957		11,472		36,383	33,572
Trust and asset management fees	8,244		6,002		24,430	17,468
Card fees	4,161		3,335		11,731	11,671
Capital markets and international banking fees	3,313		2,357		9,311	5,793
Consumer and other deposit service fees	3,559		3,499		9,745	9,842
Brokerage fees	1,294		1,281		3,767	4,502
Loan service fees	1,792		1,531		5,505	4,369
Increase in cash surrender value of life insurance	1,055		852		2,759	2,527
Net gain (loss) on investment securities	0		371		269	(173)
Net gain (loss) on sale of assets	5		1		(45)	(2)
Other operating income	4,048		858		8,415	5,371
Total non-interest income	108,387		82,251		282,080	246,468
Non-interest expenses:
Salaries and employee benefits	111,478		87,891		292,073	258,822
Occupancy and equipment	14,766		12,458		41,441	37,575
Computer services and telecommunication	12,836		8,567		31,668	26,008
Advertising and marketing	3,084		2,578		8,926	7,521
Professional and legal	4,460		1,801		10,370	6,884
Other intangibles amortization	1,674		1,542		4,917	4,569
Branch exit and facilities impairment charges	(2,908)		70		(2,709)	7,899
Net (gain) loss recognized on other real estate owned and other related expenses	(721)		577		(809)	2,197
Prepayment fees on interest bearing liabilities	0		0		0	85
Other operating expenses	25,716		18,782		68,214	55,363
Total non-interest expenses	170,385	[1]	134,266	[1]	454,091	406,923	[2]
Income before income taxes	62,224		58,596		183,725	168,754
Income tax expense	17,805		18,318		56,780	53,413
Net income	44,419		40,278		126,945	115,341
Dividends on preferred shares	2,004		2,000		6,004	6,000
Net income available to common stockholders	$ 42,415		$ 38,278		$ 120,941	$ 109,341
Common share data:
Basic earnings per common share (in dollars per share)	$ 0.55		$ 0.52		$ 1.62	$ 1.47
Diluted earnings per common share (in dollars per share)	$ 0.54		$ 0.51		$ 1.60	$ 1.45
Weighted average common shares outstanding for basic earnings per common share (in shares)	77,506,885		74,297,281		74,780,943	74,478,164
Diluted weighted average common shares outstanding for diluted earnings per common share (in shares)	78,683,170		75,029,827		75,727,580	75,154,585

[1] Includes merger related and repositioning expenses of $11.4 million and $389 thousand in the Banking Segment for the three months ended September 30, 2016 and 2015, respectively.

[2] Includes merger related and repositioning expenses of $17.2 million and $9.6 million in the Banking Segment for the nine months ended September 30, 2016 and 2015, respectively.

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 44,419	$ 40,278	$ 126,945	$ 115,341
Unrealized holding (losses) gains on investment securities, net of reclassification adjustments	(7,679)	4,989	15,603	3,507
Reclassification adjustment for amortization of unrealized gains on investment securities transferred to held to maturity from available for sale	(554)	(1,010)	(2,081)	(2,669)
Reclassification adjustments for (gains) losses included in net income	0	(371)	(269)	173
Other comprehensive (loss) income, before tax	(8,233)	3,608	13,253	1,011
Income tax benefit (expense) related to items of other comprehensive (loss) income	3,265	(1,418)	(5,267)	(399)
Other comprehensive (loss) income, net of tax	(4,968)	2,190	7,986	612
Comprehensive income	$ 39,451	$ 42,468	$ 134,931	$ 115,953

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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income, Net of Tax	Treasury Stock	Noncontrolling Interest
Beginning balance at Dec. 31, 2014	$ 2,028,286	$ 115,280	$ 751	$ 1,267,761	$ 629,677	$ 20,356	$ (6,974)	$ 1,435
Increase (Decrease) in Stockholders' Equity
Net income	115,552				115,341			211
Other comprehensive income, net of tax	612					612
Issuance of common stock	218			218
Cash dividends declared on preferred shares	(6,000)				(6,000)
Cash dividends declared on common shares ($0.48 and $0.55 per share in 2015 and 2016, respectively)	(36,229)				(36,229)
Restricted common stock activity, net of tax	1,040		5	(1,841)			2,876
Stock option activity, net of tax	(133)			(133)
Repurchase of common shares	(47,215)						(47,215)
Repurchase of common shares in connection with employee benefit plans and held in trust for deferred compensation plan	(3,585)			360			(3,945)
Stock-based compensation expense	10,983			10,983
Distributions to non-controlling interest	(301)							(301)
Ending balance at Sep. 30, 2015	2,063,228	115,280	756	1,277,348	702,789	20,968	(55,258)	1,345
Beginning balance at Dec. 31, 2015	2,087,284	115,280	756	1,280,870	731,812	15,777	(58,504)	1,293
Increase (Decrease) in Stockholders' Equity
Net income	127,084				126,945			139
Other comprehensive income, net of tax	7,986					7,986
Issuance of common stock	385,099	1,227	97	383,775
Cash dividends declared on preferred shares	(6,004)				(6,004)
Cash dividends declared on common shares ($0.48 and $0.55 per share in 2015 and 2016, respectively)	(42,984)				(42,984)
Restricted common stock activity, net of tax	(1,512)		1	(2,263)			750
Stock option activity, net of tax	116		1	272			(157)
Repurchase of common shares in connection with employee benefit plans and held in trust for deferred compensation plan	(3,792)			381			(4,173)
Stock-based compensation expense	12,573			12,573
Purchase of additional investment in subsidiary from minority owners	(2,336)			(1,267)				(1,069)
Distributions to non-controlling interest	(106)							(106)
Ending balance at Sep. 30, 2016	$ 2,563,408	$ 116,507	$ 855	$ 1,674,341	$ 809,769	$ 23,763	$ (62,084)	$ 257

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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Statement of Stockholders' Equity [Abstract]
Cash dividends declared (in dollars per share)	$ 0.55	$ 0.48

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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash Flows From Operating Activities
Net income	$ 126,945	$ 115,341
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of premises and equipment and leased equipment	55,259	45,550
Branch exit and facilities impairment charges	(2,709)	7,899
Compensation expense for share-based payment plans	12,573	10,983
Net (gain) loss on sales of premises and equipment and leased equipment	(255)	1,800
Amortization of other intangibles	4,917	4,569
Provision for credit losses	16,941	14,628
Deferred income tax expense	26,208	13,521
Amortization of premiums and discounts on investment securities, net	34,968	35,441
Accretion of discounts on loans, net	(25,426)	(26,365)
Accretion of FDIC indemnification asset	0	(72)
Net (gain) loss on investment securities	(269)	173
Proceeds from sale of loans held for sale	4,601,291	5,500,778
Origination of loans held for sale	(4,694,890)	(5,450,842)
Net gain on sale of loans held for sale	(41,518)	(25,449)
Change in fair value of mortgage servicing rights	59,894	40,568
Net (gain) loss on other real estate owned	(1,823)	2,070
Net loss (gain) on other real estate owned related to FDIC-assisted transactions	448	(296)
Increase in cash surrender value of life insurance	(2,759)	(2,527)
Increase in other assets, net	(162,260)	(120,160)
Increase (decrease) in other liabilities, net	22,618	(8,576)
Net cash provided by operating activities	30,153	159,034
Cash Flows From Investing Activities
Proceeds from sales of investment securities available for sale	19,023	28,356
Proceeds from maturities and calls of investment securities available for sale	212,283	206,378
Purchases of investment securities available for sale	(19,905)	(148,374)
Proceeds from maturities and calls of investment securities held to maturity	115,040	61,521
Purchases of investment securities held to maturity	(12,690)	(295,857)
Purchases of non-marketable securities - FHLB and FRB stock	(15,999)	(35,831)
Redemption of non-marketable securities - FHLB and FRB stock	23	20,000
Net increase in loans	(780,864)	(248,219)
Purchases of mortgage servicing rights	(3,423)	(785)
Proceeds from sale of mortgage servicing rights	0	103,105
Purchases of premises and equipment and leased equipment	(125,372)	(64,149)
Proceeds from sales of premises and equipment and leased equipment	5,194	3,993
Capital improvements on other real estate owned	(96)	0
Proceeds from sale of other real estate owned	8,081	3,153
Proceeds from sale of other real estate owned related to FDIC-assisted transactions	7,105	9,674
Net cash paid in business acquisition	(9,010)	0
Purchase of additional investment in subsidiary from minority owners	(2,336)	0
Net proceeds from FDIC related covered assets	(3,182)	(6,831)
Net cash used in investing activities	(606,128)	(363,866)
Cash Flows From Financing Activities
Net increase in deposits	384,628	263,636
Net increase in short-term borrowings	442,277	9,114
Proceeds from long-term borrowings	182,247	27,159
Principal paid on long-term borrowings	(286,877)	(14,900)
Treasury stock transactions, net	(3,792)	(50,800)
Stock options exercised	1,062	499
Excess tax expense from share-based payment arrangements	0	241
Dividends paid on preferred stock	(6,004)	(6,000)
Dividends paid on common stock	(42,748)	(35,953)
Net cash provided by financing activities	670,793	192,996
Net increase (decrease) in cash and cash equivalents	94,818	(11,836)
Cash and cash equivalents:
Beginning of period	381,441	312,081
End of period	476,259	300,245
Cash payments for:
Interest paid to depositors and on other borrowed funds	26,952	21,656
Income tax payments, net	4,576	(4,958)
Supplemental Schedule of Noncash Investing Activities:
Investment securities available for sale sold not settled	(9,741)	0
Investment securities held to maturity purchased not settled	440	11,656
Loans held for sale transferred to loans held for investment	0	44,078
Loans transferred to other real estate owned	3,566	15,612
Loans transferred to other real estate owned related to FDIC-assisted transactions	1,145	3,221
Loans transferred to repossessed assets	2,796	777
Operating leases rewritten as direct finance leases included as loans	642	6,940
Noncash assets acquired:
Investment securities available for sale	505,564	0
Non-marketable securities - FHLB and FRB stock	16,000	0
Loans	1,952,826	0
Premises and equipment	39,061	0
Cash surrender value of life insurance	59,917	0
Goodwill	268,729	0
Core deposit intangible	25,500	0
Other real estate owned	4,148	0
Other assets	27,615	0
Total noncash assets acquired	2,899,360	0
Liabilities assumed:
Deposits	2,389,423	0
Short-term borrowings	48,305	0
Long-term borrowings	16,000	0
Junior subordinated notes issued to capital trusts	28,075	0
Other liabilities	23,477	0
Total liabilities assumed	$ 2,505,280	$ 0

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Basis of Presentation

9 Months Ended

Sep. 30, 2016

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

Basis of Presentation

 These unaudited consolidated financial statements include the accounts of MB Financial, Inc., a Maryland corporation (the “Company”), and its subsidiaries, including its wholly owned national bank subsidiary, MB Financial Bank, N.A. (“MB Financial Bank”), based in Chicago, Illinois. In the opinion of management, all normal recurring adjustments necessary for a fair presentation of the financial condition, results of operations and cash flows for the interim periods have been made. The results of operations for the nine months endedSeptember 30, 2016 are not necessarily indicative of the results to be expected for the entire fiscal year.

These unaudited interim financial statements have been prepared in conformity with U.S. generally accepted accounting principles (“GAAP”) and industry practice. Certain information in footnote disclosure normally included in financial statements prepared in accordance with U.S. GAAP and industry practice has been condensed or omitted pursuant to rules and regulations of the Securities and Exchange Commission. These financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015.

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions which affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements, as well as the reported amounts of income and expenses during the reported periods. Actual results could differ from those estimates.

Certain prior period amounts have been reclassified to conform to current period presentation. These reclassifications did not result in any changes to previously reported net income or stockholders’ equity.

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New Authoritative Accounting Guidance

9 Months Ended

Sep. 30, 2016

Accounting Changes and Error Corrections [Abstract]

New Authoritative Accounting Guidance

New Authoritative Accounting Guidance

ASC Topic 810 "Consolidation." New authoritative accounting guidance under ASC Topic 810, "Consolidation" amended prior guidance over the consolidation of certain legal entities. The new authoritative guidance modifies the evaluation of whether limited partnerships and similar legal entities are variable interest entities or voting interest entities, eliminates the presumption that a general partner should consolidate a limited partnership, affects the consolidation analysis of reporting entities that are involved with variable interest entities and provides a scope exception from consolidation guidance for reporting entities with interests in legal entities that are required to comply with or operate in accordance with requirements similar to those for registered money market funds. The Company adopted this new authoritative guidance on January 1, 2016, and it did not have an impact on the Company's statements of operations or financial condition.

ASC Topic 835 "Interest." New authoritative accounting guidance under ASC Topic 835, "Interest" amended prior guidance to simplify the presentation of debt issuance costs. The new authoritative guidance requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The Company adopted this new authoritative guidance on January 1, 2016, and it did not have an impact on the Company's statements of operations or financial condition.

ASC Topic 805 "Business Combinations." New authoritative accounting guidance under ASC Topic 805, "Business Combinations" amended prior guidance to require that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. The new guidance requires that the acquirer record, in the same period’s financial statements, the effect on earnings of changes in depreciation, amortization, or other income effects, if any, as a result of the change to the provisional amounts, calculated as if the accounting had been completed at the acquisition date. It also requires an entity to present separately on the face of the statement of operations or disclose in the notes the portion of the amount recorded in current-period earnings by line items that would have been recorded in previous reporting periods if the adjustment to the provisional amounts had been recognized as of the acquisition date. The Company adopted this new authoritative guidance on January 1, 2016, and it did not have an impact on the Company's statements of operations or financial condition.

ASC Topic 606 "Revenue from Contracts with Customers." New authoritative accounting guidance under ASC Topic 606, "Revenue from Contracts with Customers" amended prior guidance to require an entity to 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 and to provide clarification on identifying performance obligations and licensing implementation guidance. The new authoritative guidance was initially effective for reporting periods after January 1, 2017 but was deferred to January 1, 2018. The Company is evaluating the new guidance but does not expect it to have a significant impact on the Company's statements of operations or financial condition.

ASC Topic 825 "Financial Instruments." New authoritative accounting guidance under ASC Topic 825 "Financial Instruments" amended prior guidance to require equity investments (except those accounted for under the equity method of accounting) to be measured at fair value with changes in fair value recognized in net income. An entity may choose to measure equity investments that do not have readily determinable fair values at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or similar investment of the same issuer. The new guidance simplifies the impairment assessment of equity investments without readily determinable fair values, requires public entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes, requires an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from changes in the instrument-specific credit risk when the entity has selected the fair value option for financial instruments and requires separate presentation of financial assets and liabilities by measurement category and form of financial asset. The new authoritative guidance will be effective for reporting periods after January 1, 2018 and is not expected to have a significant impact on the Company's statements of operations or financial condition.

ASC Topic 405 "Liabilities-Extinguishment of Liabilities." New authoritative accounting guidance under ASC Topic 405, "Liabilities-Extinguishment of Liabilities" amended prior guidance to clarify that liabilities related to the sale of prepaid store-value products within the scope of this guidance are financial liabilities and that breakage for those liabilities are to be accounted for consistent with the breakage guidance in ASC Topic 606 "Revenue from Contracts with Customers." The new authoritative guidance will be effective for reporting periods after January 1, 2018. The Company is evaluating the new guidance but does not expect it to have a significant impact on the Company's statements of operations or financial condition.

ASC Topic 842 "Leases." New authoritative accounting guidance under ASC Topic 842 "Leases" amended prior guidance to require lessees to recognize the assets and liabilities arising from all leases on the balance sheet. The new authoritative guidance defines a lease as a contract, or part of a contract, that conveys the right to control the use of identified property, plant, or equipment (an identified asset) for a period of time in exchange for consideration. In addition, the qualifications for a sale and leaseback transaction have been amended. The new authoritative guidance also requires qualitative and quantitative disclosures bylessees and lessors to meet the objective of enabling users of financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases. In transition, lessees and lessors are required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. The new authoritative guidance will be effective for reporting periods after January 1, 2019. The Company is evaluating the new guidance and its impact on the Company's statements of operations and financial condition.

ASC Topic 815 "Derivatives and Hedging." New authoritative accounting guidance under ASC Topic 815 "Derivatives and Hedging" amended prior guidance to clarify that a change in the counterparty to a derivative instrument that has been designated as the hedging instrument does not, in and of itself, require dedesignation of that hedging relationship provided that all other hedge accounting criteria continue to be met. An entity has an option to apply the amendments in this new authoritative guidance on either a prospective basis or a modified retrospective basis. The new authoritative guidance will be effective for reporting periods after January 1, 2017 and early adoption is permitted. This new authoritative guidance is not expected to have a significant impact on the Company's statements of operations or financial condition.

New authoritative accounting guidance under ASC Topic 815 "Derivatives and Hedging" amended prior guidance to clarify what steps are required when assessing whether the economic characteristics and risks of call (put) options are clearly and closely related to the economic characteristics and risks of their debt hosts, which is one of the criteria for bifurcating an embedded derivative. An entity is required to consider whether (1) the payoff is adjusted based on changes in an index, (2) the payoff is indexed to an underlying other than interest rates or credit risk, (3) the debt involves a substantial premium or discount, and (4) the call (put) option is contingently exercisable. An entity should apply this new authoritative guidance on a modified retrospective basis to existing debt instruments as of the beginning of the fiscal year for which the amendments are effective. The new authoritative guidance will be effective for reporting periods after January 1, 2017 and early adoption is permitted. This new authoritative guidance is not expected to have a significant impact on the Company's statements of operations or financial condition.

ASC Topic 323 "Investment - Equity Method and Joint Ventures." New authoritative accounting guidance under ASC Topic 323 "Investment - Equity Method and Joint Ventures" amended prior guidance to eliminate the requirement to retroactively adopt the equity method of accounting as a result of an increase in the level of ownership interest or degree of influence. The new authoritative guidance required that the equity method investor add the cost of acquiring the additional interest in the investee to the current basis of the investor’s previously held interest and adopt the equity method of accounting as of the date the investment becomes qualified for equity method accounting. The new authoritative guidance will be effective for reporting periods after January 1, 2017 and early adoption is permitted. This new authoritative guidance is not expected to have a significant impact on the Company's statements of operations or financial condition.

ASC Topic 718 "Compensation - Stock Compensation." New authoritative accounting guidance under ASC Topic 718 "Compensation - Stock Compensation" amended prior guidance on several aspects, including the income tax consequences, classification of awards as either equity or liability, and classification on the statement of cash flows. The new authoritative guidance allows for all excess tax benefits and tax deficiencies to be recognized as income tax benefit or expense in the income statement. The tax effects of exercised or vested awards should be treated as discrete items in the reporting period in which they occur. An entity also should recognize excess tax benefits regardless of whether the benefit reduces taxes payable in the current period. For the statement of cash flows, excess tax benefits should be classified along with other income tax cash flows as an operating activity, and cash paid by an employer when directly withholding shares for tax withholding purposes should be classified as a financing activity. The new authoritative guidance also allows an entity to make an entity-wide accounting policy election to either estimate the number of awards that are expected to vest or account for forfeitures when they occur. In addition, the threshold to qualify for equity classification permits withholding up to the maximum statutory tax rates in the applicable jurisdictions. The new authoritative guidance will be effective for reporting periods after January 1, 2017 and early adoption is permitted. The Company early adopted the new guidance in the third quarter of 2016, and as a result, recorded a $1.8 million tax benefit in the Company's statements of operations. The Company has also elected to account for forfeitures when they occur.

ASC Topic 326 "Financial Instruments - Credit Losses." New authoritative accounting guidance under ASC Topic 326 "Financial Instruments - Credit Losses" amended the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information for credit loss estimates. The measurement of expected credit losses is based on relevant information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. The new authoritative guidance also requires a financial asset (or a group of financial assets) measured at amortized cost basis to be presented at the net amount expected to be collected (net of the allowance for credit losses). In addition, the credit losses relating to available-for-sale debt securities should be recorded through an allowance for credit losses rather than a write-down. The new authoritative guidance will be effective for reporting periods after January 1, 2020. The Company is evaluating the new guidance and its impact on the Company's statements of operations or financial condition.

ASC Topic 230 "Statement of Cash Flows." New authoritative accounting guidance under ASC Topic 230 "Statement of Cash Flows" addresses eight specific cash flow classification issues with the objective of reducing the existing diversity in practice. The new authoritative guidance will be effective for reporting periods after January 1, 2018. This new authoritative guidance is not expected to have a significant impact on the Company's statements of operations or financial condition.

ASC Topic 740 "Income Taxes." New authoritative accounting guidance under ASC Topic 740 "Income Taxes" amends prior guidance to require an entity to recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. The new authoritative guidance will be effective for reporting periods after January 1, 2018. The Company is evaluating the new guidance and its impact on the Company's statements of operations or financial condition.

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Earnings Per Common Share

9 Months Ended

Sep. 30, 2016

Earnings Per Share [Abstract]

Earnings Per Common Share

Earnings Per Common Share

Earnings per common share is computed using the two-class method. Basic earnings per common share is computed by dividing net income available to common stockholders by the weighted-average number of common shares outstanding during the applicable period, excluding outstanding participating securities. Participating securities include non-vested restricted stock awards and restricted stock units, though no actual shares of common stock related to restricted stock units are issued until the settlement of such units, to the extent holders of these securities receive non-forfeitable dividends or dividend equivalents at the same rate as holders of the Company's common stock. Diluted earnings per common share is computed using the weighted-average number of shares determined for the basic earnings per common share computation plus the dilutive effect of stock compensation using the treasury stock method.

The following table presents a reconciliation of the number of shares used in the calculation of basic and diluted earnings per common share (amounts in thousands, except share and per share data).

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2016		2015		2016		2015
Distributed earnings allocated to common stock	$	16,114	$	12,733	$	42,984	$	36,227
Undistributed earnings	28,305		27,545		83,961		79,114
Net income	44,419		40,278		126,945		115,341
Less: preferred stock dividends	2,004		2,000		6,004		6,000
Net income available to common stockholders for basic earnings per common share	42,415		38,278		120,941		109,341
Plus: preferred stock dividends on convertible preferred stock	4		—		4		—
Less: earnings allocated to participating securities	2		2		6		5
Earnings allocated to common stockholders for diluted earnings per common share	$	42,417	$	38,276	$	120,939	$	109,336
Weighted average shares outstanding for basic earnings per common share	77,506,885		74,297,281		74,780,943		74,478,164
Dilutive effect of equity awards	1,176,285		732,546		946,637		676,421
Weighted average shares outstanding for diluted earnings per common share	78,683,170		75,029,827		75,727,580		75,154,585
Basic earnings per common share	$	0.55	$	0.52	$	1.62	$	1.47
Diluted earnings per common share	0.54		0.51		1.60		1.45

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Business Combinations

9 Months Ended

Sep. 30, 2016

Business Combinations [Abstract]

Business Combinations

Business Combinations

MSA, Holding, LLC On December 31, 2015, MB Financial Bank acquired a 100% equity interest in MSA Holdings, LLC, ("MSA") the parent company of MainStreet Investment Advisors, LLC and Cambium Asset Management, LLC. Main Street Advisors provides investment management solutions to the bank trust and independent trust company markets.  Through its registered investment advisor, Cambium LLC, MSA provides efficient, cost-effective account management solutions on a discretionary basis for high net worth clients, both individuals and institutions, and small accounts through its BluePrint portfolio solution.

This business combination was accounted for under the acquisition method of accounting. Accordingly, the results of operations of the acquired company were included in the Company’s results of operations starting on January 1, 2016. Under this method of accounting, assets and liabilities acquired are recorded at their estimated fair values, net of applicable income tax effects. The excess cost over fair value of net assets acquired was recorded as goodwill. The Company recorded $13.5 million in goodwill and $8.8 million in other intangibles as a result of this acquisition. The amounts recognized for the business combination in the financial statements as of June 30, 2016 were determined to be final.

American Chartered Bancorp, Inc. Effective August 24, 2016, American Chartered Bancorp, Inc. ("American Chartered"), an Illinois corporation, was merged (the "Merger") with and into MB Financial, Inc., a Maryland corporation ("MB Financial"), pursuant to the Agreement and Plan of Merger, dated as of November 20, 2015 (the "Merger Agreement"), by and between MB Financial and American Chartered. This transaction continues to solidify the Company's market position in Chicago. At the effective time of the Merger (the "Effective Time"), (i) each share of the common stock, no par value, of American Chartered ("American Chartered Common Stock") that was issued and outstanding immediately prior to the Effective Time, (ii) each share of American Chartered’s 8% Cumulative Voting Convertible Preferred Stock, Series D ("American Chartered Series D Preferred Stock"), that was issued and outstanding immediately prior to the Effective Time whose holder elected pursuant to American Chartered’s charter to receive the same consideration in the Merger as holders of American Chartered Common Stock, based on the number of shares of American Chartered Common Stock into which such share of American Chartered Series D Preferred Stock would otherwise then be convertible, and (iii) each share of American Chartered Non-Voting Perpetual Preferred Stock, Series F, that was issued and outstanding immediately prior to the Effective Time, was converted into the right to receive, subject to the election and proration procedures set forth in the Merger Agreement: (1) cash in the amount of $9.30 (the "Cash Consideration") or (2) 0.2732 shares of the Company's common stock, with cash paid in lieu of fractional Company shares determined by multiplying the fractional Company share amount by $39.01 (the average closing sale price of the Company's common stock for the five full trading days ending on August 23, 2016) (the "Stock Consideration"). The holders of such shares of American Chartered stock also could elect to receive a combination of the Cash Consideration and the Stock Consideration for their shares. Each share of American Chartered Series D Preferred Stock whose holder did not elect to receive the same consideration in the Merger as holders of American Chartered Common Stock, based on the number of shares of American Chartered Common Stock into which such share of American Chartered Series D Preferred Stock would otherwise then be convertible, was converted into the right to receive one share of the Company's 8% cumulative voting convertible preferred stock, Series B. Consideration paid was $487.4 million, including $382.8 million in common stock (9.7 million shares), $102.3 million in cash and $2.3 million in preferred stock and stock-based awards assumed. The $102.3 million in cash consideration includes payments for the value of the net option shares of the American Chartered stock options pursuant to the Agreement and Plan of Merger.

This business combination was accounted for under the acquisition method of accounting. Accordingly, the results of operations of the acquired company have been included in the Company’s results of operations since the date of acquisition. Under this method of accounting, the assets acquired, liabilities assumed and consideration paid are recorded at their estimated fair values. The excess cost over fair value of net assets acquired is recorded as goodwill. In the event that the fair value of net assets acquired exceeds the cost, the Company will record a gain on the acquisition. As the consideration paid for American Chartered exceeded the net assets acquired, goodwill of $268.8 million was recorded on the acquisition and allocated to the banking segment. Goodwill recorded in the transaction, which reflects the increased Chicago market share and related synergies expected from the combined operations, is not tax deductible. The amounts recognized for the business combination in the financial statements as of September 30, 2016 have been determined only provisionally as fair values continue to be assessed.

Estimated fair values of the assets acquired and liabilities assumed in the American Chartered transaction, as of the closing date of the transaction were as follows (in thousands):

	August 24, 2016
ASSETS
Cash and cash equivalents	$	93,307
Investment securities available for sale	505,564
Non-marketable securities - FRB and FHLB Stock	16,000
Loans	1,952,826
Premises and equipment	39,061
Cash surrender value of life insurance	59,917
Goodwill	268,758
Other intangibles	25,500
Other real estate owned	4,148
Other assets	27,615
Total assets	$	2,992,696
LIABILITIES
Deposits	$	2,389,423
Short-term borrowings	48,305
Long-term borrowings	16,000
Junior subordinated notes issued to capital trusts	28,075
Accrued expenses and other liabilities	23,477
Total liabilities	$	2,505,280
Total identifiable net assets	$	487,416
Consideration:
Market value of common stock at $39.28 per share at August 24, 2016 (9,744,636 shares of common stock issued)	$	382,769
Series B preferred stock at $2,337.97 per share at August 24, 2016 (525 shares of preferred stock issued) (1)	1,227
Stock-based compensation attributed to pre-business combination service	1,103
Cash paid	102,317
Total fair value of consideration, excluding Series B preferred stock	$	487,416

⁽¹⁾  Per share fair value amount determined as if the shares of Series B were converted into shares common stock.

Purchased loans acquired in a business combination are recorded at estimated fair value on their purchase date without a carryover of the related allowance for loan and lease losses. These acquired loans are segregated into three types: pass rated loans with no discount attributable to credit quality, non-impaired loans with a discount attributable at least in part to credit quality and impaired loans with evidence of significant credit deterioration.  

• Pass rated loans (typically performing loans) are accounted for in accordance with ASC 310-20 "Nonrefundable Fees and Other Costs" as these loans do not have evidence of credit deterioration since origination.

• Non-impaired loans (typically performing substandard loans) are accounted for in accordance with ASC 310-30 if they display at least some level of credit deterioration since origination.

• Impaired loans (typically substandard loans on non-accrual status) are accounted for in accordance with ASC 310-30 as they display significant credit deterioration since origination.

For pass rated loans (non-purchased credit-impaired loans), the difference between the estimated fair value of the loans and the principal outstanding is accreted over the remaining life of the loans. The accretable discount for the non-purchased credit-impaired loans was $29.0 million as of the date of the acquisition.

In accordance with ASC 310-30, for both purchased non-impaired loans (performing substandard loans) and purchased credit-impaired loans, the loans are pooled by loan type and the difference between contractually required payments at acquisition and the cash flows expected to be collected is referred to as the non-accretable difference. Further, any excess of cash flows expected at acquisition over the estimated fair value is referred to as the accretable yield and is recognized into interest income over the remaining life of the loan pools when there is a reasonable expectation about the amount and timing of such cash flows. The non-accretable and accretable discount for the purchased credit-impaired loans was $4.3 million and $805 thousand, respectively, as of the date of the acquisition.

The following table presents the acquired loans as of the acquisition date (in thousands):

	Purchased Credit-Impaired Loans		Purchased Non-Credit-Impaired Loans
Fair value	$	24,575	$	1,928,251
Gross contractual amounts receivable	31,408		2,207,765
Best estimate of contractual cash flows not expected to be collected (1)	5,048		129,027
Best estimate of contractual cash flows expected to be collected	26,360		2,078,738

⁽¹⁾  Includes interest payments not expected to be collected due to loan prepayments as well as principal and interest payments not expected to be collected due to customer default.

The Company incurred costs of $1.8 million directly related to the consummation of the merger for the nine months ended September 30, 2016, which is recorded in professional and legal fees on the statement of operations. The data processing systems were converted in September 2016.

The following table provides the unaudited pro forma information for the results of operations for the nine months ended September 30, 2016 and 2015, as if the acquisition had occurred January 1, 2015. The pro forma results combine the historical results of American Chartered into the Company's consolidated statement of operations including the impact of certain acquisition accounting adjustments including loan discount accretion, investment securities discount accretion, intangible assets amortization, deposit premium accretion and borrowing discount amortization. The pro forma results have been prepared for comparative purposes only and are not necessarily indicative of the results that would have been obtained had the acquisition actually occurred on January 1, 2015. No assumptions have been applied to the pro forma results of operations regarding possible revenue enhancements, provision for credit losses, expense efficiencies or asset dispositions. The merger related expenses that have been recognized are included in net income in the table below.

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2016		2015		2016		2015
(in thousands)
Total revenues (net interest income plus non-interest income)	$	256,866	$	228,099	$	731,987	$	678,735
Net income	48,432		50,581		147,078		141,751

Revenues and earnings of the acquired company since the acquisition date have not been disclosed as it is not practicable as American Chartered was merged into the Company and separate financial information is not readily available.

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Investment Securities

9 Months Ended

Sep. 30, 2016

Investments, Debt and Equity Securities [Abstract]

Investment Securities

Investment Securities

Amortized cost and fair value of investment securities were as follows as of the dates indicated (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
September 30, 2016
Available for Sale
U.S. Government sponsored agencies and enterprises	$	53,456	$	512	$	—		$	53,968
States and political subdivisions	383,041		27,914		(218		)	410,737
Residential mortgage-backed securities	1,066,834		10,948		(1,445		)	1,076,337
Commercial mortgage-backed securities	93,962		3,203		(172		)	96,993
Corporate bonds	208,940		2,167		(914		)	210,193
Equity securities	10,932		196		—			11,128
Total Available for Sale	1,817,165		44,940		(2,749		)	1,859,356
Held to Maturity
States and political subdivisions	939,491		53,682		(33		)	993,140
Residential mortgage-backed securities	175,771		6,927		—			182,698
Total Held to Maturity	1,115,262		60,609		(33		)	1,175,838
Total	$	2,932,427	$	105,549	$	(2,782	)	$	3,035,194
December 31, 2015
Available for Sale
U.S. Government sponsored agencies and enterprises	$	63,805	$	806	$	—		$	64,611
States and political subdivisions	373,285		23,083		(1		)	396,367
Residential mortgage-backed securities	759,816		7,363		(3,630		)	763,549
Commercial mortgage-backed securities	128,509		1,839		(241		)	130,107
Corporate bonds	222,784		815		(3,971		)	219,628
Equity securities	10,757		4		—			10,761
Total Available for Sale	1,558,956		33,910		(7,843		)	1,585,023
Held to Maturity
States and political subdivisions	1,016,519		36,874		(638		)	1,052,755
Residential mortgage-backed securities	214,291		7,721		—			222,012
Total Held to Maturity	1,230,810		44,595		(638		)	1,274,767
Total	$	2,789,766	$	78,505	$	(8,481	)	$	2,859,790

The Company has no direct exposure to the State of Illinois, but approximately 21% of the state and political subdivisions portfolio consisted of securities issued by municipalities located in Illinois as of September 30, 2016. Approximately 97% of the state and political subdivisions securities were general obligation issues, and 48% were insured or had another form of credit enhancement as of September 30, 2016.

Unrealized losses on investment securities by length of time in a continuous unrealized loss position and the fair value of the related securities at September 30, 2016 were as follows (in thousands):

	Less Than 12 Months					12 Months or More					Total
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
	Value		Losses			Value		Losses			Value		Losses
Available for Sale
States and political subdivisions	$	20,526	$	(218	)	$	—	$	—		$	20,526	$	(218	)
Residential mortgage-backed securities	374,312		(1,214		)	27,699		(231		)	402,011		(1,445		)
Commercial mortgage-backed securities	71		(1		)	11,664		(171		)	11,735		(172		)
Corporate bonds	9,834		(155		)	19,950		(759		)	29,784		(914		)
Total Available for Sale	404,743		(1,588		)	59,313		(1,161		)	464,056		(2,749		)
Held to Maturity
States and political subdivisions	31,142		(32		)	387		(1		)	31,529		(33		)
Total	$	435,885	$	(1,620	)	$	59,700	$	(1,162	)	$	495,585	$	(2,782	)

Unrealized losses on investment securities by length of time in a continuous unrealized loss position and the fair value of the related securities at December 31, 2015 were as follows (in thousands):

	Less Than 12 Months					12 Months or More					Total
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
	Value		Losses			Value		Losses			Value		Losses
Available for Sale
States and political subdivisions	$	219	$	(1	)	$	—	$	—		$	219	$	(1	)
Residential mortgage-backed securities	357,877		(2,835		)	43,566		(795		)	401,443		(3,630		)
Commercial mortgage-backed securities	2,324		(5		)	11,809		(236		)	14,133		(241		)
Corporate bonds	73,774		(1,164		)	18,286		(2,807		)	92,060		(3,971		)
Total Available for Sale	434,194		(4,005		)	73,661		(3,838		)	507,855		(7,843		)
Held to Maturity
States and political subdivisions	66,152		(519		)	6,190		(119		)	72,342		(638		)
Total	$	500,346	$	(4,524	)	$	79,851	$	(3,957	)	$	580,197	$	(8,481	)

The total number of security positions in the investment portfolio in an unrealized loss position at September 30, 2016 was 271 compared to 193 at December 31, 2015. This increase in total number of security positions in a continuous unrealized loss position from December 31, 2015 to September 30, 2016 was mainly attributable to the mortgage-backed securities in the investment securities portfolio.  Declines in the fair value of available for sale securities below their cost that are deemed to be other than temporary are reflected in earnings as realized losses to the extent the impairment is related to credit losses. The amount of the impairment related to other factors is recognized in other comprehensive income. In estimating other-than-temporary impairment losses, management considers, among other things, (i) the length of time and the extent to which the fair value has been less than cost, (ii) the financial condition and near-term prospects of the issuer, and (iii) whether the Company is more likely than not to sell the security before recovery of its cost basis.

As of September 30, 2016, management does not have the intent to sell any of the securities in the table above at September 30, 2016 and believes that it is more likely than not that the Company will not have to sell any such securities before a recovery of cost. The fair value is expected to recover as the securities approach their maturity date or repricing date or if market yields for such investments decline. Accordingly, as of September 30, 2016, management believes the impairments detailed in the table above at September 30, 2016 are temporary.

Changes in market interest rates can significantly influence the fair value of securities, and the fair value of our municipal securities portfolio would decline substantially if interest rates increase materially.

Net gains (losses) recognized on investment securities available for sale were as follows (in thousands):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2016		2015		2016			2015
Realized gains	$	—	$	371	$	323		$	1,454
Realized losses	—		—		(54		)	(1,627		)
Net gains (losses)	$	—	$	371	$	269		$	(173	)

The amortized cost and fair value of investment securities as of September 30, 2016 by contractual maturity are shown below. Maturities may differ from contractual maturities in mortgage-backed securities because the mortgages underlying the securities may be called or repaid without any penalties. Therefore, mortgage-backed securities are not included in the maturity categories in the following maturity summary.

	Amortized		Fair
(In thousands)	Cost		Value
Available for sale:
Due in one year or less	$	81,215	$	81,620
Due after one year through five years	267,485		273,115
Due after five years through ten years	44,899		46,964
Due after ten years	251,838		273,199
Equity securities	10,932		11,128
Residential and commercial mortgage-backed securities	1,160,796		1,173,330
	1,817,165		1,859,356
Held to maturity:
Due in one year or less	87,409		87,524
Due after one year through five years	146,995		151,557
Due after five years through ten years	159,780		171,871
Due after ten years	545,307		582,188
Residential mortgage-backed securities	175,771		182,698
	1,115,262		1,175,838
Total	$	2,932,427	$	3,035,194

Investment securities with a carrying amount of $1.2 billion at September 30, 2016 and $1.4 billion at December 31, 2015 were pledged as collateral on public deposits and for other purposes as required or permitted by law, while only $839.3 million and $878.2 million were required to be pledged at September 30, 2016 and December 31, 2015, respectively. Of those pledged, the Company had investment securities pledged as collateral for advances from the Federal Home Loan Bank of $108.8 million at December 31, 2015 and none were pledged at September 30, 2016.

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Loans

9 Months Ended

Sep. 30, 2016

Receivables [Abstract]

Loans

Loans

Loans consist of the following at (in thousands):

	September 30, 2016		December 31, 2015
Commercial loans	$	4,385,812	$	3,616,286
Commercial loans collateralized by assignment of lease payments	1,873,380		1,779,072
Commercial real estate	3,794,801		2,695,676
Residential real estate	998,827		628,169
Construction real estate	451,023		252,060
Indirect vehicle	522,271		384,095
Home equity	275,288		216,573
Other consumer loans	77,956		80,661
Total loans, excluding purchased credit-impaired loans	12,379,358		9,652,592
Purchased credit-impaired loans	161,338		141,406
Total loans	$	12,540,696	$	9,793,998

Loans are made to individuals as well as commercial and tax exempt entities. Specific loan terms vary as to interest rate, repayment, and collateral requirements based on the type of loan requested and the credit worthiness of the prospective borrower. Except for commercial loans collateralized by assignment of lease payments, asset-based loans, residential real estate loans and indirect vehicle loans, credit risk tends to be geographically concentrated in that a majority of the loan customers are located in the markets serviced by MB Financial Bank.

The Company's extension of credit is governed by its Credit Risk Policy, which was established to control the quality of the Company's loans. This policy is reviewed and approved by the Enterprise Risk Committee of the Company's Board of Directors on an annual basis.

Commercial Loans. Commercial credit is extended primarily to emerging middle market and middle market customers. Such credits are typically comprised of working capital loans, loans for physical asset expansion, asset acquisition loans and other business loans. Loans to closely held businesses will generally be guaranteed in full or for a significant amount by the businesses' principal owners. Commercial loans are made based primarily on the historical and projected cash flow of the borrower and secondarily on the underlying collateral provided by the borrower. The cash flows of borrowers, however, may not behave as forecasted and collateral securing loans may fluctuate in value due to economic or individual performance factors. Minimum standards and underwriting guidelines have been established for all commercial loan types. Asset-based loans, also included in commercial loans, are made to businesses with the primary source of repayment derived from payments on the related assets securing the loan. Collateral for these loans may include accounts receivable, inventory and equipment, and is monitored regularly to ensure ongoing sufficiency of collateral coverage and quality. The primary risk for these loans is a significant decline in collateral values due to general market conditions. Loan terms that mitigate these risks include typical industry amortization schedules, percentage of collateral advances, maintenance of cash collateral accounts and regular asset monitoring. Because of the national scope of our asset-based lending, the risk of these loans is also diversified by geography.

Commercial Loans Collateralized by Assignment of Lease Payments ("Lease Loans"). The Company makes lease loans to lessors where the underlying leases are with both investment grade and non-investment grade companies. Investment grade lessees are companies rated in one of the four highest categories by Moody's Investor Services or Standard & Poor's Rating Services or, in the event the related lessee has not received any such rating, where the related lessee would be viewed under the underwriting policies of the Company as an investment grade company. Whether or not companies fall into this category, each lease loan is considered on its individual merit based on the financial wherewithal of the lessee using financial information available at the time of underwriting.

Commercial Real Estate Loans. Commercial real estate loans are subject to underwriting standards and processes similar to commercial loans. These loans are viewed primarily as cash flow loans and the repayment of these loans is largely dependent on the successful operation of the property. Loan performance may be adversely affected by factors impacting the general economy or conditions specific to the real estate market such as geographic location and/or property type.

Construction Real Estate Loans. The Company defines construction loans as loans where the loan proceeds are controlled by the Company and used exclusively for the improvement of real estate in which the Company holds a mortgage. Due to the inherent risk in this type of loan, they are subject to other industry specific policy guidelines outlined in the Company's Credit Risk Policy.

Consumer Related Loans. The Company originates direct and indirect consumer loans, including primarily residential real estate, home equity lines and loans, credit cards, and indirect vehicle loans (motorcycle, marine, recreational and powersports vehicles). Each loan type is underwritten based upon several factors including debt to income, type of collateral and loan to collateral value, credit history and the Company's relationship with the borrower. Indirect loan and credit card underwriting involves the use of risk-based pricing in the underwriting process.

Purchased credit-impaired loans. Purchased credit-impaired loans are loans accounted for under ASC 310-30, which include purchased credit-impaired loans acquired through a business combination, FDIC-assisted transactions and re-purchase transactions with the Government National Mortgage Association ("GNMA"). The loans re-purchased from GNMA were originally sold by the Company with servicing retained and subsequently became delinquent. These loans are also insured by the Federal Housing Administration (commonly referred to as "FHA") or the U.S. Department of Veterans Affairs (commonly referred to as "VA") where the Company would be able to recover the principal balance of these loans. All re-purchases from GNMA are at the Company's discretion.

A collateral pledge agreement exists whereby at all times, the Company must keep on hand, free of all other pledges, liens, and encumbrances, first mortgage loans and home equity loans with unpaid principal balances aggregating no less than 133% for first mortgage loans and 250% for home equity loans of the outstanding advances from the Federal Home Loan Bank.  As of September 30, 2016 and December 31, 2015, the Company had $4.9 billion and $3.2 billion, respectively, of loans pledged as collateral for long-term Federal Home Loan Bank advances and third party letters of credit, while only $3.1 billion and $2.2 billion were required to be pledged at September 30, 2016 and December 31, 2015, respectively.

The following table presents the contractual aging of the recorded investment in past due loans by class of loans as of September 30, 2016 and December 31, 2015 (in thousands):

	Current		30-59 Days Past Due		60-89 Days Past Due		Loans Past Due 90 Days or More		Total Past Due		Total
September 30, 2016
Commercial	$	4,376,819	$	2,649	$	104	$	6,240	$	8,993	$	4,385,812
Commercial collateralized by assignment of lease payments	1,855,322		12,141		4,672		1,245		18,058		1,873,380
Commercial real estate:
Healthcare	572,228		—		—		—		—		572,228
Industrial	854,045		298		1,289		—		1,587		855,632
Multifamily	549,486		141		366		113		620		550,106
Retail	522,696		333		235		453		1,021		523,717
Office	416,965		1,336		49		—		1,385		418,350
Other	871,881		1,646		532		709		2,887		874,768
Residential real estate	986,386		2,347		1,739		8,355		12,441		998,827
Construction real estate	451,023		—		—		—		—		451,023
Indirect vehicle	518,881		2,301		716		373		3,390		522,271
Home equity	270,028		1,475		490		3,295		5,260		275,288
Other consumer	77,570		166		129		91		386		77,956
Total loans, excluding purchased credit-impaired loans	12,323,330		24,833		10,321		20,874		56,028		12,379,358
Purchased credit-impaired loans	92,346		1,108		5,848		62,036		68,992		161,338
Total loans	$	12,415,676	$	25,941	$	16,169	$	82,910	$	125,020	$	12,540,696
Non-performing loan aging	$	31,009	$	373	$	1,801	$	20,726	$	22,900	$	53,909
December 31, 2015
Commercial	$	3,586,372	$	22,956	$	97	$	6,861	$	29,914	$	3,616,286
Commercial collateralized by assignment of lease payments	1,758,839		3,399		5,902		10,932		20,233		1,779,072
Commercial real estate:
Healthcare	476,939		—		—		—		—		476,939
Industrial	400,182		—		—		757		757		400,939
Multifamily	399,333		622		88		934		1,644		400,977
Retail	410,958		6,189		7,411		180		13,780		424,738
Office	223,935		58		—		5,189		5,247		229,182
Other	760,530		622		82		1,667		2,371		762,901
Residential real estate	612,573		5,193		1,729		8,674		15,596		628,169
Construction real estate	252,060		—		—		—		—		252,060
Indirect vehicle	380,899		2,085		698		413		3,196		384,095
Home equity	207,818		1,774		1,398		5,583		8,755		216,573
Other consumer	80,225		254		84		98		436		80,661
Total loans, excluding purchased credit-impaired loans	9,550,663		43,152		17,489		41,288		101,929		9,652,592
Purchased credit-impaired loans	81,250		3,311		4,439		52,406		60,156		141,406
Total loans	$	9,631,913	$	46,463	$	21,928	$	93,694	$	162,085	$	9,793,998
Non-performing loan aging	$	44,290	$	9,827	$	9,367	$	41,177	$	60,371	$	104,661

The following table presents the recorded investment in non-accrual loans and loans past due ninety days or more and still accruing by class of loans, excluding purchased credit-impaired loans, as of September 30, 2016 and December 31, 2015 (in thousands):

	September 30, 2016				December 31, 2015
			Loans past due				Loans past due
	Non-accrual		90 days or more and still accruing		Non-accrual		90 days or more and still accruing
Commercial	$	8,583	$	1,166	$	24,689	$	42
Commercial collateralized by assignment of lease payments	4,996		153		7,027		5,318
Commercial real estate:
Healthcare	—		—		—		—
Industrial	278		—		1,136		—
Multifamily	2,648		—		3,415		—
Office	447		—		4,496		693
Retail	607		—		17,594		—
Other	531		144		1,544		195
Residential real estate	16,781		220		17,951		253
Construction real estate	—		—		—		—
Indirect vehicle	1,955		—		2,046		—
Home equity	15,300		—		18,156		—
Other consumer	9		91		11		95
Total	$	52,135	$	1,774	$	98,065	$	6,596

The Company utilizes an internal asset classification system as a means of reporting problem and potential problem loans. Under the Company's risk rating system, the Company classifies potential problem and problem loans as “Special Mention,” “Substandard,” and “Doubtful.” Substandard loans include those characterized by the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected. Loans classified as Doubtful have all the weaknesses inherent in those classified as Substandard with the added characteristic that the weaknesses present make collection or liquidation in full, on the basis of currently existing facts, conditions and values, highly questionable and improbable. Loans that do not currently expose the Company to sufficient risk to warrant classification in one of the aforementioned categories but possess weaknesses that deserve management's close attention are deemed to be Special Mention. Risk ratings are updated any time the situation warrants and at least annually. Loans listed as not rated are included in groups of homogeneous loans with similar risk and loss characteristics.

The following tables present the risk category of loans by class of loans based on the most recent analysis performed, excluding purchased credit-impaired loans, as of September 30, 2016 and December 31, 2015 (in thousands):

	Pass		Special Mention		Substandard		Doubtful		Total
September 30, 2016
Commercial	$	4,163,243	$	131,163	$	91,406	$	—	$	4,385,812
Commercial collateralized by assignment of lease payments	1,859,012		5,504		8,864		—		1,873,380
Commercial real estate:
Healthcare	555,166		17,062		—		—		572,228
Industrial	831,090		23,751		791		—		855,632
Multifamily	546,183		312		3,611		—		550,106
Retail	514,299		8,646		772		—		523,717
Office	409,124		5,086		4,140		—		418,350
Other	828,578		26,085		20,105		—		874,768
Construction real estate	451,023		—		—		—		451,023
Total	$	10,157,718	$	217,609	$	129,689	$	—	$	10,505,016
December 31, 2015
Commercial	$	3,373,943	$	115,548	$	126,795	$	—	$	3,616,286
Commercial collateralized by assignment of lease payments	1,760,674		4,367		14,031		—		1,779,072
Commercial real estate:
Healthcare	472,599		4,340		—		—		476,939
Industrial	380,200		19,011		1,728		—		400,939
Multifamily	396,117		595		4,265		—		400,977
Retail	393,543		13,310		17,885		—		424,738
Office	216,584		3,797		8,801		—		229,182
Other	730,713		6,193		25,995		—		762,901
Construction real estate	252,060		—		—		—		252,060
Total	$	7,976,433	$	167,161	$	199,500	$	—	$	8,343,094

Approximately $18.1 million and $59.6 million of the substandard loans were non-performing as of September 30, 2016 and December 31, 2015, respectively.

For residential real estate, home equity, indirect vehicle and other consumer loan classes, which are not rated, the Company evaluates credit quality based on the aging status of the loan, which was previously presented, and by payment activity. The following table presents the recorded investment in those loan classes based on payment activity, excluding purchased credit-impaired loans, as of September 30, 2016 and December 31, 2015 (in thousands):

	Performing		Non-performing		Total
September 30, 2016
Residential real estate	$	981,826	$	17,001	$	998,827
Indirect vehicle	520,316		1,955		522,271
Home equity	259,988		15,300		275,288
Other consumer	77,856		100		77,956
Total	$	1,839,986	$	34,356	$	1,874,342
December 31, 2015
Residential real estate	$	609,965	$	18,204	$	628,169
Indirect vehicle	382,049		2,046		384,095
Home equity	198,417		18,156		216,573
Other consumer	80,555		106		80,661
Total	$	1,270,986	$	38,512	$	1,309,498

The recorded investment in residential mortgage loans secured by residential real estate properties for which foreclosure proceedings are in process totaled $23.6 million and $20.8 million at September 30, 2016 and December 31, 2015, respectively.

The following tables present loans individually evaluated for impairment by class of loans, excluding purchased credit-impaired loans, as of September 30, 2016 and December 31, 2015 (in thousands):

	September 30, 2016
									Three Months Ended				Nine Months Ended
	Unpaid Principal Balance		Recorded Investment		Partial Charge-offs		Allowance for Loan Losses Allocated		Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
With no related allowance recorded:
Commercial	$	1,808	$	1,808	$	—	$	—	$	1,871	$	—	$	2,377	$	—
Commercial collateralized by assignment of lease payments	1,161		794		367		—		1,141		27		1,026		27
Commercial real estate:
Healthcare	—		—		—		—		—		—		—		—
Industrial	—		—		—		—		—		—		536		—
Multifamily	1,981		1,981		—		—		2,334		—		2,362		—
Retail	2,683		943		1,740		—		949		—		2,577		—
Office	—		—		—		—		—		—		342		—
Other	—		—		—		—		—		—		80		—
Residential real estate	—		—		—		—		—		—		—		—
Construction real estate	—		—		—		—		—		—		—		—
Indirect vehicle	218		125		93		—		277		—		292		—
Home equity	—		—		—		—		—		—		192		—
Other consumer	—		—		—		—		—		—		—		—
With an allowance recorded:
Commercial	17,476		17,476		—		5,401		19,180		—		26,513		—
Commercial collateralized by assignment of lease payments	7,260		7,260		—		3,933		5,086		—		3,201		18
Commercial real estate:
Healthcare	—		—		—		—		—		—		—		—
Industrial	—		—		—		—		—		—		—		—
Multifamily	—		—		—		—		—		—		—		—
Retail	3,606		3,606		—		363		3,612		—		7,911		—
Office	—		—		—		—		—		—		995		—
Other	—		—		—		—		—		—		314		—
Residential real estate	15,117		13,268		1,849		2,394		13,325		—		13,068		—
Construction real estate	—		—		—		—		—		—		—		—
Indirect vehicle	—		—		—		—		—		—		—		—
Home equity	29,688		27,276		2,412		3,252		27,443		—		28,635		—
Other consumer	—		—		—		—		—		—		—		—
Total	$	80,998	$	74,537	$	6,461	$	15,343	$	75,218	$	27	$	90,421	$	45

	December 31, 2015
									Year Ended
	Unpaid Principal Balance		Recorded Investment		Partial Charge-offs		Allowance for Loan Losses Allocated		Average Recorded Investment		Interest Income Recognized
With no related allowance recorded:
Commercial	$	11,253	$	11,253	$	—	$	—	$	6,628	$	—
Commercial collateralized by assignment of lease payments	3,453		2,949		504		—		1,035		54
Commercial real estate:
Healthcare	—		—		—		—		—		—
Industrial	820		757		63		—		3,467		—
Multifamily	575		575		—		—		1,540		17
Retail	7,872		6,131		1,741		—		2,768		—
Office	1,608		1,031		577		—		1,663		—
Other	—		—		—		—		965		—
Residential real estate	970		970		—		—		717		—
Construction real estate	—		—		—		—		—		—
Indirect vehicle	—		—		—		—		—		—
Home equity	927		927		—		—		1,000		—
Other consumer	—		—		—		—		—		—
With an allowance recorded:
Commercial	23,394		23,394		—		7,523		18,820		—
Commercial collateralized by assignment of lease payments	3,297		3,297		—		1,790		4,013		104
Commercial real estate:
Healthcare	—		—		—		—		—		—
Industrial	—		—		—		—		228		—
Multifamily	2,155		2,155		—		17		3,307		27
Retail	16,034		16,034		—		4,926		8,885		—
Office	2,929		2,929		—		1,717		2,457		—
Other	592		592		—		199		9,629		—
Residential real estate	12,950		12,769		181		2,634		13,484		—
Construction real estate	—		—		—		—		214		—
Indirect vehicle	119		119		—		—		287		—
Home equity	28,696		28,583		113		3,131		27,747		—
Other consumer	—		—		—		—		—		—
Total	$	117,644	$	114,465	$	3,179	$	21,937	$	108,854	$	202

Impaired loans included accruing restructured loans of $28.6 million and $27.0 million that have been modified and are performing in accordance with those modified terms as of September 30, 2016 and December 31, 2015, respectively.  In addition, impaired loans included $23.4 million and $23.6 million of non-performing restructured loans as of September 30, 2016 and December 31, 2015, respectively.

Loans may be restructured in an effort to maximize collections from financially distressed borrowers. We use various restructuring techniques, including, but not limited to, deferring past due interest or principal, implementing an A/B note structure, redeeming past due taxes, reducing interest rates, extending maturities and modifying amortization schedules. Residential real estate loans are restructured in an effort to minimize losses while allowing borrowers to remain in their primary residences when possible. Programs that we offer to residential real estate borrowers include the Home Affordable Refinance Program (“HARP”), a restructuring program similar to the Home Affordable Modification Program (“HAMP”) for first mortgage borrowers, the Second Lien Modification Program (“2MP”) and similar programs for home equity borrowers in keeping with the restructuring techniques discussed above.

Periodically, the Company will restructure a note into two separate notes (A/B structure), charging off the entire B portion of the note. The A note is structured with appropriate loan-to-value and cash flow coverage ratios that provide for a high likelihood of repayment. The A note is classified as a non-performing note until the borrower has displayed a historical payment performance for a reasonable time prior to and subsequent to the restructuring. A period of sustained repayment for at least six months generally is required to return the note to accrual status provided that management has determined that the performance is reasonably expected to continue. The A note will be classified as a restructured note (either performing or non-performing) through the calendar year of the restructuring that the historical payment performance has been established. As of September 30, 2016 and December 31, 2015, there was one A/B structure with a recorded investment of $943 thousand and $1.0 million, respectively, which is included above as an accruing restructured loan. 

A loan classified as a troubled debt restructuring will no longer be included in the troubled debt restructuring disclosures in the years after the restructuring if the loan performs in accordance with the terms specified by the restructuring agreement and the interest rate specified in the restructuring agreement represents a market rate at the time of modification. The specified interest rate is considered a market rate when the interest rate is equal to or greater than the rate the Company is willing to accept at the time of restructuring for a new loan with comparable risk. If there are concerns that the borrower will not be able to meet the modified terms of the loan, the loan will continue to be included in the troubled debt restructuring disclosures.

Impairment analyses on commercial-related loans classified as troubled debt restructurings are performed in conjunction with the normal allowance for loan and lease losses process. Consumer loans classified as troubled debt restructurings are aggregated in two pools that share common risk characteristics, home equity and residential real estate loans, with impairment measured on a quarterly basis based on the present value of expected future cash flows discounted at the loan's effective interest rate.

The following table presents loans that were restructured during the three months ended September 30, 2016 (dollars in thousands):

	September 30, 2016
	Number of Loans	Pre-Modification Recorded Investment		Post-Modification Recorded Investment		Charge-offs and Specific Reserves
Performing:
Residential real estate	2	$	101	$	101	$	18
Home equity	2	102		102		12
Total	4	$	203	$	203	$	30
Non-Performing:
Commercial	3	$	5,874	$	5,874	$	1,490
Residential real estate	4	484		484		85
Indirect vehicle	7	34		34		17
Home equity	5	489		489		72
Total	19	$	6,881	$	6,881	$	1,664

The following table presents loans that were restructured during the nine months endedSeptember 30, 2016 (dollars in thousands):

	September 30, 2016
	Number of Loans	Pre-Modification Recorded Investment		Post-Modification Recorded Investment		Charge-offs and Specific Reserves
Performing:
Commercial	1	$	1,870	$	1,870	$	412
Residential real estate	2	101		101		18
Home equity	4	511		511		12
Total	7	$	2,482	$	2,482	$	442
Non-Performing:
Commercial	7	$	14,481	$	14,481	$	4,990
Residential real estate	6	639		639		85
Indirect vehicle	25	183		183		60
Home equity	28	3,600		3,600		138
Total	66	$	18,903	$	18,903	$	5,273

The following table presents loans that were restructured during the three months ended September 30, 2015 (dollars in thousands):

	September 30, 2015
	Number of Loans	Pre-Modification Recorded Investment		Post-Modification Recorded Investment		Charge-offs and Specific Reserves
Performing:
Home equity	4	$	477	$	477	$	—
Total	4	$	477	$	477	$	—
Non-Performing:
Indirect vehicle	7	$	45	$	45	$	16
Home equity	4	550		550		8
Total	11	$	595	$	595	$	24

The following table presents loans that were restructured during the nine months endedSeptember 30, 2015 (dollars in thousands):

	September 30, 2015
	Number of Loans	Pre-Modification Recorded Investment		Post-Modification Recorded Investment		Charge-offs and Specific Reserves
Performing:
Commercial	1	$	80	$	80	$	—
Home equity	16	4,290		4,290		—
Total	17	$	4,370	$	4,370	$	—
Non-Performing:
Commercial real estate:
Multifamily	1	$	334	$	334	$	—
Residential real estate	1	140		140		17
Indirect vehicle	13	75		75		23
Home equity	9	1,348		1,348		130
Total	24	$	1,897	$	1,897	$	170

Of the troubled debt restructurings entered into during the past twelve months, $224 thousand subsequently defaulted during the nine months endedSeptember 30, 2016.  Performing troubled debt restructurings are considered to have defaulted when they become 90 days or more past due post-restructuring or are placed on non-accrual status.

The following table presents the troubled debt restructurings activity during the nine months endedSeptember 30, 2016 (in thousands):

	Performing			Non-performing
Beginning balance	$	26,991		$	23,619
Additions	2,482			18,903
Charge-offs	—			(1,046		)
Principal payments, net	(2,145		)	(8,695		)
Removals	(1,655		)	(6,384		)
Transfer to other real estate owned	—			(112		)
Transfers in	3,677			789
Transfers out	(789		)	(3,677		)
Ending balance	$	28,561		$	23,397

Loans removed from troubled debt restructuring status are those that were restructured in a previous calendar year at a market rate of interest and have performed in compliance with the modified terms.

The following table presents the type of modification for loans that have been restructured during the nine months endedSeptember 30, 2016 (in thousands):

	September 30, 2016
	Extended
	Maturity,				Delay in
	Amortization		Extended		Payments or
	and Reduction		Maturity and/or		Reduction of
	of Interest Rate		Amortization		Interest Rate		Total
Commercial	$	—	$	14,481	$	1,870	$	16,351
Commercial collateralized by assignment of lease payments	—		—		—		—
Commercial real estate:
Healthcare	—		—		—		—
Industrial	—		—		—		—
Multifamily	—		—		—		—
Retail	—		—		—		—
Office	—		—		—		—
Other	—		—		—		—
Residential real estate	484		256		—		740
Construction real estate	—		—		—		—
Indirect vehicle	—		—		183		183
Home equity	3,220		820		71		4,111
Other consumer	—		—		—		—
Total	$	3,704	$	15,557	$	2,124	$	21,385

The following table presents the activity in the allowance for credit losses, balance in allowance for credit losses and recorded investment in loans by portfolio segment and based on impairment method as of September 30, 2016 and 2015 (in thousands):

	Commercial			Commercial collateralized  by assignment of lease payments		Commercial real estate		Residential real estate		Construction real estate		Indirect vehicle		Home equity			Other consumer			Unfunded commitments			Total
September 30, 2016
Allowance for credit losses:
Three Months Ended
Beginning balance	$	50,297		$	10,549	$	46,040	$	4,800	$	14,230	$	3,100	$	4,199		$	2,399		$	2,719		$	138,333
Charge-offs	1,341			367		529		290		7		838		376			409			—			4,157
Recoveries	665			3		324		45		50		436		65			86			—			1,674
Provision	(3,894		)	2,944		1,239		1,575		2,033		598		2,309			(407		)	152			6,549
Ending balance	$	45,727		$	13,129	$	47,074	$	6,130	$	16,306	$	3,296	$	6,197		$	1,669		$	2,871		$	142,399
Nine Months Ended
Beginning balance	$	39,316		$	10,434	$	45,475	$	5,734	$	15,113	$	2,418	$	7,374		$	2,276		$	3,368		$	131,508
Charge-offs	2,126			3,288		2,601		1,134		151		2,420		1,233			1,216			—			14,169
Recoveries	1,997			520		2,761		151		94		1,400		576			620			—			8,119
Provision	6,540			5,463		1,439		1,379		1,250		1,898		(520		)	(11		)	(497		)	16,941
Ending balance	$	45,727		$	13,129	$	47,074	$	6,130	$	16,306	$	3,296	$	6,197		$	1,669		$	2,871		$	142,399
Ending allowance balance attributable to loans:
Individually evaluated for impairment	$	5,401		$	3,933	$	363	$	2,394	$	—	$	—	$	3,252		$	—		$	737		$	16,080
Collectively evaluated for impairment	40,161			9,196		46,235		3,736		16,249		3,296		2,945			1,669			2,134			125,621
Acquired and accounted for under ASC 310-30 (1)	165			—		476		—		57		—		—			—			—			698
Total ending allowance balance	$	45,727		$	13,129	$	47,074	$	6,130	$	16,306	$	3,296	$	6,197		$	1,669		$	2,871		$	142,399
Loans:
Individually evaluated for impairment	$	19,284		$	8,054	$	6,530	$	13,268	$	—	$	125	$	27,276		$	—		$	—		$	74,537
Collectively evaluated for impairment	4,366,528			1,865,326		3,788,271		985,559		451,023		522,146		248,012			77,956			—			12,304,821
Acquired and accounted for under ASC 310-30 (1)	22,913			—		41,286		66,698		14,131		—		13,886			2,424			—			161,338
Total ending loans balance	$	4,408,725		$	1,873,380	$	3,836,087	$	1,065,525	$	465,154	$	522,271	$	289,174		$	80,380		$	—		$	12,540,696

	Commercial		Commercial collateralized  by assignment of lease payments		Commercial real estate			Residential real estate			Construction real estate		Indirect vehicle		Home equity			Other consumer		Unfunded commitments			Total
September 30, 2015
Allowance for credit losses:
Three Months Ended
Beginning balance	$	39,142	$	11,268	$	38,076		$	6,669		$	12,459	$	1,909	$	8,412		$	2,135	$	4,060		$	124,130
Charge-offs	1,657		1,980		170			292			5		581		358			467		—			5,510
Recoveries	456		11		2,402			337			216		334		186			118		—			4,060
Provision	5,044		985		1,216			(868		)	123		512		(1,490		)	484		(648		)	5,358
Ending balance	$	42,985	$	10,284	$	41,524		$	5,846		$	12,793	$	2,174	$	6,750		$	2,270	$	3,412		$	128,038
Nine Months Ended
Beginning balance	$	29,571	$	9,962	$	41,826		$	6,646		$	8,918	$	1,687	$	9,456		$	1,960	$	4,031		$	114,057
Charge-offs	2,283		2,080		2,312			1,189			11		2,082		1,078			1,391		—			12,426
Recoveries	1,514		1,100		6,338			417			253		1,354		447			356		—			11,779
Provision	14,183		1,302		(4,328		)	(28		)	3,633		1,215		(2,075		)	1,345		(619		)	14,628
Ending balance	$	42,985	$	10,284	$	41,524		$	5,846		$	12,793	$	2,174	$	6,750		$	2,270	$	3,412		$	128,038
Ending allowance balance attributable to loans:
Individually evaluated for impairment	$	7,943	$	2,618	$	3,123		$	2,834		$	—	$	8	$	2,478		$	—	$	1,388		$	20,392
Collectively evaluated for impairment	34,731		7,666		36,975			3,012			12,700		2,166		4,272			2,270		2,024			105,816
Acquired and accounted for under ASC 310-30 (1)	311		—		1,426			—			93		—		—			—		—			1,830
Total ending allowance balance	$	42,985	$	10,284	$	41,524		$	5,846		$	12,793	$	2,174	$	6,750		$	2,270	$	3,412		$	128,038
Loans:
Individually evaluated for impairment	$	36,325	$	6,724	$	29,354		$	14,233		$	—	$	131	$	29,520		$	—	$	—		$	116,287
Collectively evaluated for impairment	3,404,307		1,686,816		2,550,655			592,938			255,620		345,600		193,653			87,612		—			9,117,201
Acquired and accounted for under ASC 310-30 (1)	37,189		—		47,803			43,735			12,372		—		11,986			2,608		—			155,693
Total ending loans balance	$	3,477,821	$	1,693,540	$	2,627,812		$	650,906		$	267,992	$	345,731	$	235,159		$	90,220	$	—		$	9,389,181

⁽¹⁾  Loans acquired in business combinations and accounted for under ASC Subtopic 310-30 “Receivables — Loans and Debt Securities Acquired with Deteriorated Credit Quality.”

Purchased loans acquired in a business combination are recorded at estimated fair value on their purchase date without a carryover of the related allowance for loan and lease losses. These acquired loans are segregated into three types: pass rated loans with no discount attributable to credit quality, non-impaired loans with a discount attributable at least in part to credit quality and impaired loans with evidence of significant credit deterioration.  

• Pass rated loans (typically performing loans) are accounted for in accordance with ASC 310-20 "Nonrefundable Fees and Other Costs" as these loans do not have evidence of credit deterioration since origination.

• Non-impaired loans (typically performing substandard loans) are accounted for in accordance with ASC 310-30 if they display at least some level of credit deterioration since origination.

• Impaired loans (typically substandard loans on non-accrual status) are accounted for in accordance with ASC 310-30 as they display significant credit deterioration since origination.

For pass rated loans (non-purchased credit-impaired loans), the difference between the estimated fair value of the loans and the principal outstanding is accreted over the remaining life of the loans.

In accordance with ASC 310-30, for both purchased non-impaired loans and purchased credit-impaired loans, the loans are pooled by loan type and the difference between contractually required payments at acquisition and the cash flows expected to be collected is referred to as the non-accretable difference. Further, any excess of cash flows expected at acquisition over the estimated fair value is referred to as the accretable yield and is recognized into interest income over the remaining life of the loan pools when there is a reasonable expectation about the amount and timing of such cash flows.

Substantially all of the loans acquired in transactions with the FDIC displayed at least some level of credit deterioration and as such are included as non-impaired and impaired loans as described immediately above.

During the nine months endedSeptember 30, 2016, there was a negative provision for credit losses of $515 thousand and net charge-offs of $864 thousand in relation to purchased loans. There was $698 thousand and $2.1 million in allowance for loan and lease losses related to these purchased loans at September 30, 2016 and December 31, 2015, respectively.  The provision for credit losses and accompanying charge-offs are included in the table above.

Changes in the accretable yield for loans acquired and accounted for under ASC 310-30 were as follows for the three and nine months endedSeptember 30, 2016 and 2015 (in thousands):

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2016			2015			2016			2015
Balance at beginning of period	$	13,160		$	11,456		$	12,596		$	7,434
Purchases	805			—			805			—
Accretion	(2,564		)	(1,794		)	(7,193		)	(5,541		)
Other (1)	2,523			590			7,716			8,359
Balance at end of period	$	13,924		$	10,252		$	13,924		$	10,252

⁽¹⁾  Primarily includes discount transfers from non-accretable discount to accretable discount due to better than expected performance of loan pools acquired and accounted for under ASC 310-30.

In our FDIC-assisted transactions, the fair value of purchased credit-impaired loans, on the acquisition date, was determined based on assigned risk ratings, expected cash flows and the fair value of loan collateral. The fair value of loans that were non-impaired was determined based on estimates of losses on defaults and other market factors. Due to the loss-share agreements with the FDIC, we recorded a receivable (FDIC indemnification asset) from the FDIC equal to the present value of the corresponding reimbursement percentages on the estimated losses embedded in the loan portfolio.

When cash flow estimates are adjusted downward for a particular loan pool, the FDIC indemnification asset is increased. An allowance for loan and lease losses is established for the impairment of the loans. A provision for credit losses is recognized for the difference between the increase in the FDIC indemnification asset and the decrease in cash flows.

When cash flow estimates are adjusted upward for a particular loan pool, the FDIC indemnification asset is decreased. The difference between the decrease in the FDIC indemnification asset and the increase in cash flows is accreted over the estimated life of the loan pool.

When cash flow estimates are adjusted downward for covered foreclosed real estate, the FDIC indemnification asset is increased. A charge is recognized for the difference between the increase in the FDIC indemnification asset and the decrease in cash flows.

When cash flow estimates are adjusted upward for covered foreclosed real estate, the FDIC indemnification asset is decreased. Any write-down after the transfer to covered foreclosed real estate is reversed.

In both scenarios, the clawback liability (the amount the FDIC requires the Company to pay back if certain thresholds are met) will increase or decrease accordingly.

For other loans acquired through business combinations, the fair value of purchased credit-impaired loans, on the acquisition date, was determined based on assigned risk ratings, expected cash flows and the fair value of loan collateral. The fair value of loans that were non-impaired was determined based on estimates of losses on defaults and other market factors.

The carrying amount of loans acquired through a business combination by loan pool type are as follows (in thousands):

September 30, 2016	Purchased Credit-Impaired Loans		Purchased Non-Credit-Impaired Loans		Total
Covered loans:
Consumer related	$	18,619	$	—	$	18,619
Non-covered loans:
Commercial loans	22,913		972,065		994,978
Commercial loans collateralized by assignment of lease payments	—		72,193		72,193
Commercial real estate	41,286		1,412,677		1,453,963
Construction real estate	14,131		38,568		52,699
Consumer related	64,389		403,608		467,997
Total non-covered loans	142,719		2,899,111		3,041,830
Total acquired	$	161,338	$	2,899,111	$	3,060,449

Effective April 1, 2014, the losses on commercial related loans (commercial, commercial real estate and construction real estate) acquired in connection with the Heritage Community Bank ("Heritage") FDIC-assisted transaction ceased being covered under the loss-share agreement for that transaction. The carrying amount of those loans was $1.9 million as of September 30, 2016. Any recoveries, net of expenses, received on commercial related loans on which losses were incurred prior to April 1, 2014 will continue to be covered (and any such net recoveries must be shared with the FDIC in accordance with the loss-share agreement) through March 31, 2017. The losses on consumer related loans acquired in connection with the Heritage FDIC-assisted transaction will continue to be covered under the loss-share agreement through March 31, 2019.

The losses on commercial related loans acquired in connection with the Benchmark Bank ("Benchmark") FDIC-assisted transaction ceased to be covered under the loss-share agreement for that transaction effective January 1, 2015. The carrying amount of those loans was $1.7 million as of September 30, 2016. Any recoveries, net of expenses, received on commercial related loans on which losses were incurred prior to January 1, 2015 will continue to be covered (and any such net recoveries must be shared with the FDIC in accordance with the loss-share agreements) through December 31, 2017. The losses on consumer related loans acquired in connection with the Benchmark FDIC-assisted transaction will continue to be covered under the loss-share agreements through December 31, 2019.

Effective July 1, 2015, the losses on commercial related loans acquired in connection with Broadway Bank ("Broadway") and New Century Bank ("New Century") FDIC-assisted transactions ceased to be covered under the loss-share agreements for those transactions. The carrying amount of those loans was $8.2 million as of September 30, 2016. Any recoveries, net of expenses, received on commercial related loans on which losses were incurred prior to July 1, 2015 will continue to be covered (and any such net recoveries must be shared with the FDIC in accordance with the loss-share agreements) through June 30, 2018. The losses on consumer related loans acquired in connection with the Broadway and New Century FDIC-assisted transactions will continue to be covered under the loss-share agreement through June 30, 2020.

Consumer related purchased credit-impaired loans also included re-purchase transactions with GNMA of $60.6 million as of September 30, 2016.

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Goodwill and Intangibles

9 Months Ended

Sep. 30, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangibles

Goodwill and Intangibles

The excess of the cost of an acquisition over the fair value of the net assets acquired, including core deposit and client relationship intangibles, consists of goodwill. Under ASC Topic 350, goodwill is subject to at least annual assessments for impairment by applying a fair value based test. The Company reviews goodwill to determine potential impairment annually, or more frequently if events and circumstances indicate that goodwill might be impaired, by comparing the carrying value of the reporting units with the fair value of the reporting units.

The Company's annual assessment date is as of December 31. Goodwill is tested for impairment at the reporting unit level. The Company has three reporting units: Banking, Leasing and Mortgage Banking. No impairment losses were recognized during the nine months endedSeptember 30, 2016 or 2015. The carrying amount of goodwill was $993.8 million and $725.1 million at September 30, 2016 and December 31, 2015, respectively.

The following table presents the changes in the carrying amount of goodwill for the nine months endedSeptember 30, 2016 (in thousands):

	Banking		Leasing		Mortgage Banking		Total
Balance at beginning of period	$	684,430	$	40,640	$	—	$	725,070
Goodwill from business combinations (1)	268,729		—		—		268,729
Balance at end of period	$	953,159	$	40,640	$	—	$	993,799

⁽¹⁾  Due to the American Chartered merger and adjustments recognized for the MSA acquisition.

The Company has other intangible assets consisting of core deposit and client relationship intangibles that had a remaining weighted average amortization period of approximately thirteen years as of September 30, 2016.

The following table presents the changes during the nine months endedSeptember 30, 2016 in the carrying amount of core deposit and client relationship intangibles, and the gross carrying amount, accumulated amortization, and net book value as of September 30, 2016 (in thousands):

	September 30, 2016
Balance at beginning of period	$	44,812
Amortization expense	(4,917		)
Other intangibles from acquisition	25,500
Balance at end of period	$	65,395
Gross carrying amount	$	118,792
Accumulated amortization	(53,397		)
Net book value	$	65,395

The following presents the estimated future amortization expense of other intangible assets (in thousands):

Year ending December 31,	Amount
2016	$	2,390
2017	8,198
2018	7,456
2019	5,677
2020	5,026
Thereafter	36,648
	$	65,395

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Deposits

9 Months Ended

Sep. 30, 2016

Banking and Thrift [Abstract]

Deposits

Deposits

The composition of deposits was as follows as of September 30, 2016 and December 31, 2015 (in thousands):

	September 30,		December 31,
	2016		2015
Demand deposit accounts, non-interest bearing	$	6,410,334	$	4,627,184
NOW, money market and interest bearing deposits	4,660,407		4,144,633
Savings accounts	1,147,900		974,555
Certificates of deposit, $250,000 or more	1,121,599		877,352
Other certificates of deposit	939,026		881,491
Total	$	14,279,266	$	11,505,215

Certificates of deposit of $250,000 or more included $759.3 million and $500.2 million of brokered deposits at September 30, 2016 and December 31, 2015, respectively.  Brokered deposits typically consist of smaller individual time certificates that have the same liquidity characteristics and yields consistent with time certificates of $250,000 or more.

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Short-Term Borrowings

9 Months Ended

Sep. 30, 2016

Debt Disclosure [Abstract]

Short-Term Borrowings

Short-Term Borrowings

Short-term borrowings were as follows as of September 30, 2016 and December 31, 2015 (dollars in thousands):

	September 30, 2016				December 31, 2015
	Weighted Average Interest Rate		Amount		Weighted Average Interest Rate		Amount
Customer repurchase agreements	0.21	%	$	256,569	0.20	%	$	201,207
Federal Home Loan Bank advances	0.38		1,200,000		0.17		775,000
Federal funds purchased	0.60		39,750		0.09		4,530
Line of credit	—		—		2.18		25,000
Total	0.36	%	$	1,496,319	0.23	%	$	1,005,737

Securities sold under agreements to repurchase are agreements in which the Company acquires funds by selling assets to another party under a simultaneous agreement to repurchase the same assets at a specified price and date.  The Company enters into repurchase agreements and also offers a demand deposit account product to customers that sweeps their balances in excess of an agreed upon target amount into overnight repurchase agreements.  All securities sold under agreements to repurchase are recorded on the face of the balance sheet. The Company pledges mortgage-backed securities as collateral for the repurchase agreements and may be required to provide additional collateral based on the fair value of those securities.

The Company had Federal Home Loan Bank fixed rate advances with a maturity date less than one year of $1.2 billion and $775.0 million at September 30, 2016 and December 31, 2015, respectively. At September 30, 2016, the interest rate on the advances outstanding on that date had rates ranging from 0.24% to 0.40% with maturities from October 3, 2016 to June 23, 2017. The Company has investment securities available for sale and loans pledged as collateral on this FHLB advance. See Note 5. Investment Securities and Note 6. Loans of the notes to the consolidated financial statements.

On December 18, 2015, the Company entered into a $35.0 million unsecured line of credit at the holding company level with a correspondent bank. Interest is payable at a rate of one month LIBOR + 1.75%. Nothing was outstanding as of September 30, 2016, and $25.0 million was outstanding as of December 31, 2015. The line of credit is scheduled to mature on June 30, 2017.

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Long-Term Borrowings

9 Months Ended

Sep. 30, 2016

Debt Disclosure [Abstract]

Long-Term Borrowings

Long-Term Borrowings

The Company had Federal Home Loan Bank advances with remaining contractual maturities greater than one year of $230.1 million at September 30, 2016 and $305.2 million at December 31, 2015. As of September 30, 2016, the advances had fixed terms with effective interest rates, net of discounts, ranging from 0.30% to 5.87% and maturities ranging from December 2017 to April 2035. The Company has investment securities available for sale and loans pledged as collateral on these FHLB advances. See Note 5. Investment Securities and Note 6. Loans of the notes to the consolidated financial statements.

The Company had notes payable to banks totaling $66.5 million and $55.0 million at September 30, 2016 and December 31, 2015, respectively, which as of September 30, 2016, were accruing interest at rates ranging from 2.46% to 7.40%, with a weighted average rate of 4.22%.  Lease investments includes equipment with an amortized cost of $79.0 million and $65.8 million at September 30, 2016 and December 31, 2015, respectively, that is pledged as collateral on these notes.

On August 24, 2016, the Company assumed a $16.0 million unsecured term loan at the holding company level with a correspondent bank through the American Chartered merger. Interest is payable at a rate of one month LIBOR + 1.75% and matures on June 30, 2020. Principal payments of $1.0 million are due quarterly until maturity. As of September 30, 2016, $15.0 million was outstanding.

The Company had a $40.0 million10-year structured repurchase agreement as of December 31, 2015, which had a fixed interest rate of 4.75% and matured in March 2016.

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Junior Subordinated Notes Issued to Capital Trusts

9 Months Ended

Sep. 30, 2016

Debt Disclosure [Abstract]

Junior Subordinated Notes Issued to Capital Trusts

Junior Subordinated Notes Issued to Capital Trusts

The Company has established statutory trusts for the sole purpose of issuing trust preferred securities and related trust common securities.  The proceeds from such issuances were used by the trusts to purchase junior subordinated notes of the Company, which are the sole assets of each trust.  Concurrently with the issuance of the trust preferred securities, the Company issued guarantees for the benefit of the holders of the trust preferred securities.  The Company’s outstanding trust preferred securities qualify, and are treated by the Company, as Tier 2 regulatory capital. Prior to the completion of the American Chartered merger, the trust preferred securities qualified, and were treated by the Company, as Tier 1 regulatory capital.  The Company owns all of the common securities of each trust.  The trust preferred securities issued by each trust rank equally with the common securities in right of payment, except that if an event of default under the indenture governing the notes has occurred and is continuing, the preferred securities will rank senior to the common securities in right of payment.

The table below summarizes the outstanding junior subordinated notes and the related trust preferred securities issued by each trust as of September 30, 2016 (in thousands):

	Coal City Capital Trust I		MB Financial Capital Trust II		MB Financial Capital Trust III		MB Financial Capital Trust IV
Junior Subordinated Notes:
Principal balance	$	25,774	$	36,083	$	10,310	$	20,619
Annual interest rate	3-mo LIBOR + 1.80%		3-mo LIBOR + 1.40%		3-mo LIBOR + 1.50%		3-mo LIBOR + 1.52%
Stated maturity date	September 1, 2028		September 15, 2035		September 23, 2036		September 15, 2036
Call date	September 1, 2008		December 15, 2010		September 23, 2011		September 15, 2011
Trust Preferred Securities:
Face Value	$	25,000	$	35,000	$	10,000	$	20,000
Annual distribution rate	3-mo LIBOR + 1.80%		3-mo LIBOR + 1.40%		3-mo LIBOR + 1.50%		3-mo LIBOR + 1.52%
Issuance date	July 1998		August 2005		July 2006		August 2006
Distribution dates (1)	Quarterly		Quarterly		Quarterly		Quarterly

	MB Financial Capital Trust V		MB Financial Capital Trust VI		FOBB Statutory Trust III (2)		TAYC Capital Trust II (3)
Junior Subordinated Notes:
Principal balance	$	30,928	$	23,196	$	5,155	$	41,238
Annual interest rate	3-mo LIBOR + 1.30%		3-mo LIBOR + 1.30%		3-mo LIBOR + 2.80%		3-mo LIBOR + 2.68%
Stated maturity date	December 15, 2037		October 30, 2037		January 23, 2034		June 17, 2034
Call date	December 15, 2012		October 30, 2012		January 23, 2009		June 17, 2009
Trust Preferred Securities:
Face Value	$	30,000	$	22,500	$	5,000	$	40,000
Annual distribution rate	3-mo LIBOR + 1.30%		3-mo LIBOR + 1.30%		3-mo LIBOR + 2.80%		3-mo LIBOR + 2.68%
Issuance date	September 2007		October 2007		December 2003		June 2004
Distribution dates (1)	Quarterly		Quarterly		Quarterly		Quarterly

	American Chartered Statutory Trust I (4)		American Chartered Statutory Trust II (4)
Junior Subordinated Notes:
Principal balance	$	20,619	$	10,464
Annual interest rate	3-mo LIBOR + 3.60%		3-mo LIBOR + 2.75%
Stated maturity date	December 18, 2031		October 7, 2034
Call date	December 18, 2006		October 7, 2009
Trust Preferred Securities:
Face Value	$	20,000	$	10,000
Annual distribution rate	3-mo LIBOR + 3.60%		3-mo LIBOR + 2.75%
Issuance date	November 2001		August 2004
Distribution dates (1)	Quarterly		Quarterly

⁽¹⁾  All distributions are cumulative and paid in cash.

⁽²⁾  FOBB Statutory Trust III was established by First Oak Brook Bancshares, Inc. (“FOBB”) prior to the Company's acquisition of FOBB in 2006, and the junior subordinated notes issued by FOBB to FOBB Statutory Trust III were assumed by the Company upon completion of the acquisition.

⁽³⁾  TAYC Capital Trust II was established by Taylor Capital Group, Inc. (“Taylor Capital”) prior to the Company's acquisition of Taylor Capital in 2014, and the junior subordinated notes issued by Taylor Capital to TAYC Capital Trust II were assumed by the Company upon completion of the acquisition. Principal balance and face value amounts associated with TAYC Capital Trust II do not include purchase accounting adjustments to such amounts, which in each case resulted in a discount of $6.8 million.

⁽⁴⁾  American Chartered Statutory Trust I and American Chartered Statutory Trust II were established by American Chartered prior to the Company's acquisition of American Chartered in August 2016, and the junior subordinated notes issued by American Chartered to American Chartered Statutory Trust I and American Chartered Statutory Trust II were assumed by the Company upon completion of the acquisition. Principal balance and face value amounts associated with American Chartered Statutory Trust I and American Chartered Statutory Trust II do not include purchase accounting adjustments to such amounts, which in each case resulted in a discount of $8.0 million.

The trust preferred securities are subject to mandatory redemption, in whole or in part, upon repayment of the junior subordinated notes at the stated maturity date or upon redemption.  Each trust’s ability to pay amounts due on the trust preferred securities is solely dependent upon the Company making payment on the related junior subordinated notes.  The Company’s obligation under the junior subordinated notes and other relevant trust agreements, in aggregate, constitute a full and unconditional guarantee by the Company of each trust’s obligations under the trust preferred securities issued by each trust.  The Company has the right to defer payment of interest on the notes and, therefore, distributions on the trust preferred securities, for up to five years, but not beyond the stated maturity date in the table above.  During any such deferral period, the Company may not pay cash dividends on its common or preferred stock and generally may not repurchase its common or preferred stock.

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2016

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Commitments: The Company is a party to credit-related financial instruments with off-balance-sheet risk in the normal course of business to meet the financing needs of its customers.  These financial instruments include commitments to extend credit, standby letters of credit and commercial letters of credit.  Such commitments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the consolidated balance sheets.

The Company’s exposure to credit loss is represented by the contractual amount of these commitments.  The Company follows the same credit policies in making commitments as it does for on-balance-sheet instruments.

At September 30, 2016 and December 31, 2015, the following financial instruments were outstanding, the contractual amounts of which represent off-balance sheet credit risk (in thousands):

	Contractual Amount
	September 30, 2016		December 31, 2015
Commitments to extend credit:
Home equity lines	$	243,331	$	187,478
Other commitments	3,596,246		3,049,152
Letters of credit:
Standby	172,737		137,945
Commercial	5,211		1,108

Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract.  Commitments generally have fixed expiration dates or other termination clauses and may require a payment of a fee.  The commitments for home equity lines of credit may expire without being drawn upon.  Therefore, the total commitment amounts do not necessarily represent future cash requirements.  The amount of collateral obtained, if it is deemed necessary by the Company, is based on management’s credit evaluation of the customer.

The Company, in the normal course of its business, regularly offers standby and commercial letters of credit to its bank customers.  Standby and commercial letters of credit are a conditional but irrevocable form of guarantee.  Under letters of credit, the Company typically guarantees payment to a third party beneficiary upon the default of payment or nonperformance by the bank customer and upon receipt of complying documentation from that beneficiary.

Both standby and commercial letters of credit may be issued for any length of time, but normally do not exceed a period of five years.  These letters of credit may also be extended or amended from time to time depending on the bank customer’s needs.  As of September 30, 2016, the maximum remaining term for any standby letters of credit was September 30, 2030.  A fee is charged to the bank customer and is recognized as income over the life of the letter of credit, unless considered non-rebatable under the terms of a letter of credit application.

At September 30, 2016, the aggregate contractual amount of these letters of credit, which represents the maximum potential amount of future payments that the Company would be obligated to pay, increased$38.9 million to $177.9 million from $139.1 million at December 31, 2015.  Of the $177.9 million in commitments outstanding at September 30, 2016, approximately $121.0 million of the letters of credit have been issued or renewed since December 31, 2015.

Letters of credit issued on behalf of bank customers may be done on either a secured or unsecured basis.  If a letter credit is secured, the collateral can take various forms including bank accounts, investments, fixed assets, inventory, accounts receivable or real estate.  The Company takes the same care in making credit decisions and obtaining collateral when it issues letters of credit on behalf of its customers as it does when making other types of loans.

As of September 30, 2016, the Company had approximately $7.1 million in capital expenditure commitments outstanding which relate to various projects to renovate the corporate office space and branches.

Concentrations of credit risk:  The majority of the loans, commitments to extend credit and standby letters of credit have been granted to customers in the Company’s market area.  As of September 30, 2016, approximately 21% of our investments in securities issued by states and political subdivisions were within the state of Illinois.  We did not hold any direct exposure to the state of Illinois as of September 30, 2016. Our commitments to extend credit are primarily related to commercial credits.  Standby letters of credit are granted primarily to commercial borrowers. Our asset-based loans are made to borrowers located throughout the United States. Lease banking provides banking services to lessors located throughout the United States. Our leasing subsidiaries originate leases to companies located throughout the United States. In addition, our mortgage segment and indirect vehicle lenders originate loans to borrowers located throughout the United States.

Contingencies: In the normal course of business, the Company is involved in various legal proceedings.  In the opinion of management, any liability resulting from pending proceedings would not be expected to have a material adverse effect on the Company’s consolidated financial statements.

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Fair Value Measurements

9 Months Ended

Sep. 30, 2016

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

ASC Topic 820 defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. A fair value measurement assumes that the transaction to sell the asset or transfer the liability occurs in the principal market for the asset or liability or, in the absence of a principal market, the most advantageous market for the asset or liability. The price in the principal (or most advantageous) market used to measure the fair value of the asset or liability is not adjusted for transaction costs. An orderly transaction is a transaction that assumes exposure to the market for a period prior to the measurement date to allow for marketing activities that are usual and customary for transactions involving such assets and liabilities; it is not a forced transaction. Market participants are buyers and sellers in the principal market that are (i) independent, (ii) knowledgeable, (iii) able to transact and (iv) willing to transact.

ASC Topic 820 requires the use of valuation techniques that are consistent with the market approach, the income approach and/or the cost approach. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets and liabilities. The income approach uses valuation techniques to convert expected future amounts, such as cash flows or earnings, to a single present value amount on a discounted basis. The cost approach is based on the amount that currently would be required to replace the service capacity of an asset (replacement cost). Valuation techniques should be consistently applied. Inputs to valuation techniques refer to the assumptions that market participants would use in pricing the asset or liability. Inputs may be observable, meaning those that reflect the assumptions market participants would use in pricing the asset or liability developed based on market data obtained from independent sources, or unobservable, meaning those that reflect the reporting entity's own assumptions about the assumptions market participants would use in pricing the asset or liability developed based on the best information available in the circumstances. In that regard, ASC Topic 820 establishes a fair value hierarchy for valuation inputs that gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. The fair value hierarchy is as follows:

Level 1: Quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date.

Level 2: Significant other observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data.

Level 3: Significant unobservable inputs that reflect a reporting entity's own assumptions about the assumptions that market participants would use in pricing an asset or liability.

A description of the valuation methodologies used for instruments measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy, is set forth below.

In general, fair value is based upon quoted market prices, where available. If such quoted market prices are not available, fair value is based upon internally developed models that primarily use, as inputs, observable market-based parameters. Valuation adjustments may be made to ensure that financial instruments are recorded at fair value. These adjustments may include amounts to reflect counterparty credit quality, the Company's creditworthiness, among other things, as well as unobservable parameters. Any such valuation adjustments are applied consistently over time. Our valuation methodologies may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. While management believes the Company's valuation methodologies are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date. Transfers between levels of the fair value hierarchy are recognized on the actual date of the event or circumstances that caused the transfer, which generally coincides with the Company's monthly and/or quarterly valuation process.

Financial Instruments Recorded at Fair Value on a Recurring Basis

Securities Available for Sale. The fair values of securities available for sale are determined by quoted prices in active markets, when available, and classified as Level 1. If quoted market prices are not available, the fair value is determined by matrix pricing, which is a mathematical technique widely used in the industry to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities' relationship to other benchmark quoted securities and classified as Level 2. In cases where significant credit valuation adjustments are incorporated into the estimation of fair value, reported amounts are classified as Level 3.

Loans Held for Sale. Residential real estate loans originated and held for sale in the secondary market are carried at fair value.The fair value of loans held for sale is determined using quoted secondary market prices and classified as Level 2.

Loans. The Company has elected to record certain mortgage loans at fair value. The fair value of these loans is determined using quoted secondary market prices and classified as Level 2.

Mortgage Servicing Rights. The Company has elected to record its mortgage servicing rights at fair value. Mortgage servicing rights do not trade in an active market with readily observable prices. Accordingly, the Company determines the fair value of mortgage servicing rights by estimating the fair value of the future cash flows associated with the mortgage loans being serviced. Key economic assumptions used in measuring the fair value of mortgage servicing rights include, but are not limited to, prepayment speeds, discount rates, delinquencies and cost to service. The assumptions used in the model are validated on a regular basis. The fair value is validated on a quarterly basis with an independent third party. Material discrepancies between the internal model and the third party validation are investigated and resolved by an internal committee. Due to the nature of the valuation inputs, mortgage servicing rights are classified in Level 3 of the fair value hierarchy.

Assets Held in Trust for Deferred Compensation and Associated Liabilities.Assets held in trust for deferred compensation are recorded at fair value and included in “Other Assets” on the consolidated balance sheets. These assets are invested in mutual funds and classified as Level 1. Deferred compensation liabilities, also classified as Level 1, are carried at the fair value of the obligation to the employee, which corresponds to the fair value of the invested assets.

Derivatives. Currently, we use interest rate swaps to manage our interest rate risk. The valuation of these instruments is determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative and classified as Level 2. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including LIBOR rate curves. We also obtain dealer quotations for these derivatives for comparative purposes to assess the reasonableness of the model valuations. In addition, we use forward commitments to buy to-be-announced mortgage securities for which we do not intend to take delivery of the security and will enter into an offsetting position before physical delivery to lessen the price volatility of the mortgage servicing rights asset. Dealer quotations are used for these derivatives and are classified as Level 1. We also offer other derivatives, including foreign currency forward contracts and interest rate lock commitments, to our customers and offset our exposure from such contracts by purchasing other financial contracts, which are valued using market consensus prices. For certain interest rate lock commitments, which are classified as Level 3, the Company uses an external valuation model to estimate the fair value of the commitments. This model relies on unobservable, internally developed inputs that reflect management’s assumptions and specific information about each borrower transaction.

The following table summarizes financial assets and financial liabilities measured at fair value on a recurring basis as of September 30, 2016 and December 31, 2015, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value (in thousands):

	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
September 30, 2016
Financial assets
Securities available for sale:
U.S Government sponsored agencies and enterprises	$	53,968	$	—	$	53,968	$	—
States and political subdivisions	410,737		—		410,320		417
Residential mortgage-backed securities	1,076,337		—		1,076,132		205
Commercial mortgage-backed securities	96,993		—		96,993		—
Corporate bonds	210,193		—		210,193		—
Equity securities	11,128		11,128		—		—
Loans held for sale	899,412		—		899,412		—
Loans	19,121		—		19,121		—
Mortgage servicing rights	154,730		—		—		154,730
Assets held in trust for deferred compensation	18,937		18,937		—		—
Derivative financial instruments	112,208		1,347		98,300		12,561
Financial liabilities
Other liabilities (1)	18,937		18,937		—		—
Derivative financial instruments	70,330		6,001		64,329		—
December 31, 2015
Financial assets
Securities available for sale:
U.S. Government sponsored agencies and enterprises	$	64,611	$	—	$	64,611	$	—
States and political subdivisions	396,367		—		395,950		417
Residential mortgage-backed securities	763,549		—		763,193		356
Commercial mortgage-backed securities	130,107		—		130,107		—
Corporate bonds	219,628		—		219,628		—
Equity securities	10,761		10,761		—		—
Loans held for sale	744,727		—		744,727		—
Loans	25,869		—		25,869		—
Mortgage servicing rights	168,162		—		—		168,162
Assets held in trust for deferred compensation	16,820		16,820		—		—
Derivative financial instruments	42,846		5,118		33,906		3,822
Financial liabilities
Other liabilities (1)	16,333		16,333		—		—
Derivative financial instruments	36,974		6,050		30,924		—

⁽¹⁾  Liabilities associated with assets held in trust for deferred compensation

The following table presents additional information about the unobservable inputs used in the fair value measurement of financial assets measured on a recurring basis that were categorized within the Level 3 of the fair value hierarchy:

	Fair Value at
	September 30, 2016		Valuation Technique	Unobservable Input	Range
	(in thousands)
States and political subdivisions	$	417	Discounted cash flows	Credit assumption	50% Loss
Residential mortgage-backed securities	205		Discounted cash flows	Constant pre-payment rates (CPR)	1% - 3%
Mortgage servicing rights	154,730		Discounted cash flows	CPR	12.3% - 16.1%
				Discount rate	9.50 - 12.00
				Maturity (months)	327 - 357
				Delinquencies	0.51 - 3.86
				Costs to service	$ 66 - $ 160
				Costs to service - delinquent	$ 150 - $ 1,000
Derivative financial instruments (mortgage	12,561		Sales cash flows	Expected closing ratio	70% - 95%
interest rate lock commitments)				Expected delivery price	98.58 bps - 109.77 bps

The significant unobservable inputs used in the fair value measurement of the Company’s mortgage servicing rights include prepayment speeds, discount rates, maturities, delinquencies and cost to service. Significant increases in prepayment speeds, discount rates, delinquencies or cost to service would result in a significantly lower fair value measurement. Conversely, significant decreases in prepayment speeds, discount rates, delinquencies or costs to service would result in a significantly higher fair value measurement. With the exception of changes in delinquencies, which can change the cost to service, the unobservable inputs move independently of each other.

Key economic assumptions used in the measuring of the fair value of the mortgage servicing rights and the sensitivity of the fair value to immediate adverse changes in those assumptions at September 30, 2016 are presented in the following table. This table does not take into account the derivatives used to economically hedge the mortgage servicing rights.

(dollars in thousands, except for weighted average cost to service)	September 30, 2016
Weighted average CPR	15.30		%
Impact on fair value of 10% adverse change	$	(7,917	)
Impact on fair value of 20% adverse change	(15,144		)
Weighted average discount rate	9.78		%
Impact on fair value of 10% adverse change	$	(5,045	)
Impact on fair value of 20% adverse change	(9,769		)
Weighted average delinquency rate	1.80		%
Impact on fair value of 10% adverse change	$	(1,329	)
Impact on fair value of 20% adverse change	(2,428		)
Weighted average costs to service	$	88
Impact on fair value of 10% adverse change	(2,988		)
Impact on fair value of 20% adverse change	(5,976		)

The Company did not have any transfers between Level 1 and Level 2 of the fair value hierarchy during the nine months endedSeptember 30, 2016. The Company's policy for determining transfers between levels occurs at the end of the reporting period when circumstances in the underlying valuation criteria change and result in transfer between levels.

The following table presents additional information about financial assets measured at fair value on a recurring basis for which the Company used significant unobservable inputs (Level 3):

	Nine Months Ended
	September 30,
	2016			2015			2016			2015			2016		2015
(in thousands)	Investment Securities						Mortgage Servicing Rights						Derivatives
Balance, beginning of period	$	773		$	973		$	168,162		$	235,402		$	3,822	$	5,074
Purchases	—			—			3,423			785			—		—
Originations	—			—			43,039			55,583			—		—
Included in earnings	—			—			(59,894		)	(40,568		)	8,739		3,088
Principal payments	(151		)	(115		)	—			—			—		—
Sales	—			—			—			(103,105		)	—		—
Balance, ending of period	$	622		$	858		$	154,730		$	148,097		$	12,561	$	8,162

Financial Instruments Recorded at Fair Value on a Nonrecurring Basis

The Company may be required, from time to time, to measure certain financial assets and financial liabilities at fair value on a nonrecurring basis in accordance with U.S. GAAP. These include assets that are measured at the lower of cost or fair value that were recognized at fair value below cost at the end of the period.

Impaired Loans.Loans for which it is probable that payment of interest and principal will not be made in accordance with the contractual terms of the loan agreement are considered impaired. Once a loan is identified as individually impaired, management measures impairment in accordance with ASC Topic 310. The fair value of impaired loans is estimated using one of several methods, including collateral value, market value of similar debt, enterprise value, liquidation value and discounted cash flows. Those impaired loans not requiring an allowance represent loans for which the fair value of the expected repayments or collateral exceed the recorded investments in such loans. In accordance with ASC Topic 820, impaired loans where an allowance is established based on the fair value of collateral require classification in the fair value hierarchy. Collateral values are estimated using Level 3 inputs based on customized discounting criteria. For a majority of impaired real estate loans where an allowance is established based on the fair value of collateral (100% at September 30, 2016), the Company obtains a current external appraisal. Other valuation techniques are used as well, including internal valuations, comparable property analysis and contractual sales information.

Non-Financial Assets and Non-Financial Liabilities Recorded at Fair Value

The Company has no non-financial assets or non-financial liabilities measured at fair value on a recurring basis. Certain non-financial assets and non-financial liabilities measured at fair value on a non-recurring basis include foreclosed assets and non-financial long-lived assets.

Other Real Estate and Repossessed Vehicles Owned (Foreclosed Assets). Foreclosed assets, upon initial recognition, are measured and reported at fair value through a charge-off to the allowance for loan and lease losses based upon the fair value of the foreclosed asset. The fair value of foreclosed assets, upon initial recognition, are estimated using Level 3 inputs based on customized discounting criteria.

Non-Financial Long-Lived Assets.  Non-financial long-lived assets, when determined to be impaired, are measured and reported at fair value using Level 3 inputs based on customized discounting criteria.

Assets measured at fair value on a nonrecurring basis as of September 30, 2016 and December 31, 2015 are included in the table below (in thousands):

	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
September 30, 2016
Financial assets:
Impaired loans	$	54,740	$	—	$	—	$	54,740
Non-financial assets:
Foreclosed assets	38,735		—		—		38,735
December 31, 2015
Financial assets:
Impaired loans	$	76,203	$	—	$	—	$	76,203
Non-financial assets:
Foreclosed assets	42,351		—		—		42,351

The following table presents additional information about the unobservable inputs used in the fair value measurement of financial assets measured on a nonrecurring basis that were categorized within the Level 3 of the fair value hierarchy:

	Fair Value at		Valuation	Unobservable
	September 30, 2016		Technique	Input	Range
	(in thousands)
Impaired loans	$	54,740	Appraisal of collateral	Appraisal adjustments	5% - 10%
Foreclosed assets	38,735		Appraisal of collateral	Appraisal adjustments	5% - 10%

ASC Topic 825 requires disclosure of the fair value of financial assets and financial liabilities, including those financial assets and financial liabilities that are not measured and reported at fair value on a recurring basis or non-recurring basis. The methodologies for estimating the fair value of financial assets and financial liabilities that are measured at fair value on a recurring or non-recurring basis are discussed above. The estimated fair value approximates carrying value for cash and cash equivalents, accrued interest and the cash surrender value of life insurance policies.

The following methods and assumptions were used by the Company in estimating the fair values of its other financial instruments:

Cash and due from banks, interest earning deposits with banks and federal funds sold: The carrying amounts reported in the balance sheet approximate fair value.

Securities held to maturity: The fair values of securities held to maturity are determined by quoted prices in active markets, when available, and classified as Level 1. If quoted market prices are not available, the fair value is determined by a matrix pricing, which is a mathematical technique widely used in the industry to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities' relationship to other benchmark quoted securities and classified as Level 2. In cases where significant credit valuation adjustments are incorporated into the estimation of fair value, reported amounts are classified as Level 3.

Non-marketable securities - FHLB and FRB Stock: The carrying amounts reported in the balance sheet approximate fair value.

Loans: The fair values for loans are estimated using discounted cash flow analyses, using the corporate bond curve adjusted for liquidity for commercial loans and the swap curve adjusted for liquidity for retail loans. The Company has elected to record certain mortgage loans at fair value. The fair value of these loans is determined using quoted secondary market prices and classified as Level 2.

Non-interest bearing deposits: The fair values disclosed are equal to their balance sheet carrying amounts, which represent the amount payable on demand.

Interest bearing deposits: The fair values disclosed for deposits with no defined maturities are equal to their carrying amounts, which represent the amounts payable on demand. Fair values for certificates of deposit are estimated using a discounted cash flow calculation that applies the Company's current incremental borrowing rates for similar terms.

Short-term borrowings: The carrying amounts of federal funds purchased, borrowings under repurchase agreements and other short-term borrowings with maturities of 90 days or less approximate their fair values.  The fair value of short-term borrowings greater than 90 days is based on the discounted value of contractual cash flows.

Long-term borrowings: The fair values of the Company's long-term borrowings (other than deposits) are estimated using discounted cash flow analyses, based on the Company's current incremental borrowing rates for similar types of borrowing arrangements.

Junior subordinated notes issued to capital trusts: The fair values of the Company's junior subordinated notes issued to capital trusts are estimated based on the quoted market prices, when available, of the related trust preferred security instruments, or are estimated based on the quoted market prices of comparable trust preferred securities.

Accrued interest: The carrying amounts of accrued interest receivable and payable approximate their fair values.

Off-balance-sheet instruments: Fair values for the Company’s off-balance-sheet lending commitments (guarantees, letters of credit and commitments to extend credit) are based on fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements.

The estimated fair values of financial instruments are as follows (in thousands):

	September 30, 2016
	Carrying Amount		Estimated Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Financial Assets:
Cash and due from banks	$	351,009	$	351,009	$	351,009	$	—	$	—
Interest earning deposits with banks	125,250		125,250		125,250		—		—
Investment securities available for sale	1,859,356		1,859,356		11,128		1,847,606		622
Investment securities held to maturity	1,115,262		1,175,838		—		1,175,838		—
Non-marketable securities - FHLB and FRB stock	146,209		146,209		—		—		146,209
Loans held for sale	899,412		899,412		—		899,412		—
Loans, net	12,401,168		12,403,330		—		19,121		12,384,209
Accrued interest receivable	58,541		58,541		58,541		—		—
Derivative financial instruments	112,208		112,208		1,347		98,300		12,561
Financial Liabilities:
Non-interest bearing deposits	$	6,410,334	$	6,410,334	$	6,410,334	$	—	$	—
Interest bearing deposits	7,868,932		7,873,233		—		—		7,873,233
Short-term borrowings	1,496,319		1,496,312		—		—		1,496,312
Long-term borrowings	311,645		312,974		—		—		312,974
Junior subordinated notes issued to capital trusts	209,159		144,681		—		—		144,681
Accrued interest payable	4,000		4,000		4,000		—		—
Derivative financial instruments	70,330		70,330		6,001		64,329		—

	December 31, 2015
	Carrying Amount		Estimated Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Financial Assets:
Cash and due from banks	$	307,869	$	307,869	$	307,869	$	—	$	—
Interest earning deposits with banks	73,572		73,572		73,572		—		—
Investment securities available for sale	1,585,023		1,585,023		10,761		1,573,489		773
Investment securities held to maturity	1,230,810		1,274,767		—		1,274,767		—
Non-marketable securities - FHLB and FRB stock	114,233		114,233		—		—		114,233
Loans held for sale	744,727		744,727		—		744,727		—
Loans, net	9,665,858		9,626,344		—		25,869		9,600,475
Accrued interest receivable	53,457		53,457		53,457		—		—
Derivative financial instruments	42,846		42,846		5,118		33,906		3,822
Financial Liabilities:
Non-interest bearing deposits	$	4,627,184	$	4,627,184	$	4,627,184	$	—	$	—
Interest bearing deposits	6,878,031		6,875,411		—		—		6,875,411
Short-term borrowings	1,005,737		1,005,705		—		—		1,005,705
Long-term borrowings	400,274		401,539		—		—		401,539
Junior subordinated notes issued to capital trusts	186,164		122,696		—		—		122,696
Accrued interest payable	3,186		3,186		3,186		—		—
Derivative financial instruments	36,974		36,974		6,050		30,924		—

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Stock Incentive Plans

9 Months Ended

Sep. 30, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock Incentive Plans

Stock Incentive Plans

ASC Topic 718 requires that the grant date fair value of equity awards to employees be recognized as compensation expense over the period during which an employee is required to provide service in exchange for such award.

The following table summarizes the impact of the Company’s share-based payment plans in the financial statements for the periods shown (in thousands):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2016		2015		2016		2015
Total cost of share-based payment plans during the period	$	4,238	$	3,508	$	12,573	$	10,983
Amount of related income tax benefit recognized in income	3,394		1,367		6,649		$	4,288

The Company adopted the Omnibus Incentive Plan (the “Omnibus Plan”) in 1997.  On May 28, 2014, the Company’s stockholders approved the third amendment and restatement of the Omnibus Plan to add 3,100,000 authorized shares for a total of 11,400,000 shares of common stock authorized to be utilized in connection with awards under the Omnibus Plan to directors, officers, and employees of the Company or any of its subsidiaries. The number of shares authorized increased by 2,400,000 to 13,800,000 upon completion of the Taylor Capital merger.  Equity grants under the Omnibus Plan can be in the form of incentive stock options, non-qualified stock options, stock appreciation rights, restricted stock, restricted stock units, performance shares, performance units, and other stock-based awards.  Shares awarded in the form of restricted stock, restricted stock units, performance shares, performance units, or other stock-based awards generally will reduce the shares available under the Omnibus Plan on a 2-for-1 basis. No more than 10% of the total number of authorized shares may be issued with respect to awards granted after May 28, 2014, other than stock appreciation rights, stock options and performance-based awards, which at the date of grant are scheduled to fully vest prior to three years from the date of grant (although such awards may provide scheduled vesting earlier with respect to some of such shares and for acceleration of vesting as provided in the Omnibus Plan).   As of September 30, 2016, there were 3,826,110 shares available for future grants.

Prior to 2014, annual equity-based incentive awards were typically granted to selected officers and employees mid-year. In 2014, these awards began being granted in the first quarter of the year.  Options are granted with an exercise price equal to no less than the market price of the Company’s shares at the date of grant; those option awards generally vest over four years of service and have 10-year contractual terms.  Restricted shares and units typically vest over a two to four year period.  Equity awards may also be granted at other times throughout the year in connection with the recruitment and retention of officers and employees.  Directors currently may elect, in lieu of cash, to receive up to 70% of their fees in stock options with a five year term, which are fully vested on the grant date (provided that the director may not sell the underlying shares for at least six months after the grant date), and up to 100% of their fees in restricted shares, which vest one year after the grant date.

The following table summarizes changes in stock options for the nine months endedSeptember 30, 2016:

	Number of Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (In Years)	Aggregate Intrinsic Value (in thousands)
Options outstanding as of December 31, 2015	2,192,431		$	27.77	4.44
Granted	501,538		28.86
Exercised	(461,405	)	28.98
Expired	(35,791	)	39.91
Forfeited or cancelled	(33,680	)	31.06
Options outstanding as of September 30, 2016	2,163,093		$	27.51	5.26	$	22,903
Options exercisable as of September 30, 2016	1,423,442		$	26.82	3.53	$	16,109

The fair value of each option award is estimated on the date of grant using the Black-Scholes option pricing model based on certain assumptions.  Expected volatility is based on historical volatility and the expectations of future volatility of Company shares.  The risk free interest rate for periods within the contractual term of the option is based on the U.S. Treasury yield curve in effect at the time of the grant.  The expected life of options is estimated based on historical employee behavior and represents the period of time that options granted are expected to remain outstanding.

 The following assumptions were used for options granted during the nine months endedSeptember 30, 2016:

	September 30, 2016
Risk-free interest rate	1.44		%
Expected volatility of Company’s stock	28.17		%
Expected dividend yield	2.21		%
Expected life of options	5.6 years
Weighted average fair value per option of options granted during the year	$	6.64

The total intrinsic value of options exercised during the nine months endedSeptember 30, 2016 and 2015 was $3.6 million and $1.3 million, respectively.

The following is a summary of changes in restricted shares and units for the nine months endedSeptember 30, 2016:

	Number of Shares and Units		Weighted Average Grant Date Fair Value
Shares and units outstanding at December 31, 2015	945,506		$	29.92
Granted	482,739		31.19
Vested	(405,633	)	28.37
Forfeited or cancelled	(23,824	)	29.95
Shares and units outstanding at September 30, 2016	998,788		31.17

The total intrinsic value of restricted shares that vested during the nine months endedSeptember 30, 2016 and 2015 was $15.7 million and $11.3 million, respectively.

The Company issued 80,780, 71,560 and 48,569 market-based restricted stock units in 2016, 2015 and 2014, respectively, which entitle recipients to shares of common stock at the end of a three year vesting period. Recipients will earn shares, totaling between 0% and 175% of the number of units issued, based on the Company's total stockholder return relative to a specified peer group of financial institutions over the three year period. The Company issued 56,752 market-based restricted stock units in 2013 that vested in 2016. Recipients earned shares totaling 175% of the number of units issued, based on the Company’s total shareholder return relative to a specified peer group of financial institutions over the three year period. The market-based restricted stock units are included in the preceding table as if the recipients earned shares equal to 100% of the units issued. A Monte Carlo simulation model was used to value the market-based restricted stock units at the time of issuance.

As of September 30, 2016, there was $25.4 million of total unrecognized compensation cost related to nonvested share-based compensation arrangements (including share option and nonvested share awards) granted under the Omnibus Plan.  At September 30, 2016, the weighted-average period over which the unrecognized compensation expense is expected to be recognized was approximately 2.4 years.

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Derivative Financial Instruments

9 Months Ended

Sep. 30, 2016

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

Derivative Financial Instruments

The Company offers various derivatives, including interest rate swaps and foreign currency forward contracts, to its qualifying customers which can mitigate our exposure to market risk through the execution of off-setting positions with inter-bank dealer counterparties. This also permits the Company to offer customized risk management solutions to our customers. These customer accommodations and any offsetting financial contracts are treated as non-designated derivative instruments and carried at fair value through an adjustment to the statement of operations.

Interest rate swap and foreign currency forward contracts involve the risk of dealing with counterparties and their ability to meet contractual terms. The net amount payable or receivable under interest rate swaps is accrued as an adjustment to interest income.  The net amount payable as of September 30, 2016 was approximately $1 thousand, and the net amount payable as of December 31, 2015 was approximately $1 thousand.  The Company's credit exposure on interest rate swaps is limited to the Company's net favorable value and interest payments of all swaps to each counterparty. In such cases, collateral is generally required from the counterparties involved if the net value of the swaps exceeds a nominal amount.  At September 30, 2016, the Company’s credit exposure relating to interest rate swaps was approximately $45.8 million, which is secured by the underlying collateral on customer loans. 

The Company also enters into mortgage banking derivatives which are classified as non-designated hedging 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 residential mortgage loans 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 had fair value commercial loan interest rate swaps, to hedge its interest rate risk, with an aggregate notional amount of $119 thousand at September 30, 2016.  For fair value hedges, the changes in fair values of both the hedging derivative and the hedged item were recorded in current earnings as other income.

Interest rate swaps, swaptions and treasury futures are used in order to lessen the price volatility of the mortgage servicing rights asset. The Company also uses forward commitments to buy to-be-announced ("TBA") mortgage securities for which the Company does not intend to take delivery of the security and will enter into an offsetting position before physical delivery to lessen the price volatility of the mortgage servicing rights asset. These derivatives are recorded at their fair value on the consolidated balance sheets in other assets with changes in fair value recorded on the consolidated statements of operations in mortgage banking revenue in non-interest income.

The Company’s derivative financial instruments are summarized below as of September 30, 2016 and December 31, 2015 (in thousands):

	Asset Derivatives								Liability Derivatives
	September 30, 2016				December 31, 2015				September 30, 2016					December 31, 2015
	Notional		Estimated		Notional		Estimated		Notional		Estimated			Notional		Estimated
	Amount		Fair Value		Amount		Fair Value		Amount		Fair Value			Amount		Fair Value
Derivative instruments designated as hedges of fair value:
Interest rate swap contracts (1)	$	—	$	—	$	—	$	—	$	119	$	(5	)	$	154	$	(9	)
Stand-alone derivative instruments: (2)
Interest rate swap contracts	1,226,157		49,520		1,034,298		27,856		1,226,157		(49,520		)	1,025,186		(27,899		)
Interest rate options contracts	219,409		872		222,585		628		219,409		(872		)	190,622		(585		)
Foreign exchange contracts	49,550		3,231		72,529		3,970		44,474		(3,011		)	63,339		(3,671		)
Spot foreign exchange contracts	742		17		328		5		278		(6		)	132		—
Mortgage related derivatives:
Interest rate swap contracts	1,332,000		44,660		898,000		4,928		185,000		(10,915		)	665,000		(3,723		)
Interest rate swaptions contracts	—		—		—		—		—		—			—		—
Treasury futures contracts	86,500		406		—		—		—		—			—		—
TBA mortgage securities	290,000		856		35,000		33		—		—			—		—
Forward loan sale commitments	85,000		85		503,500		1,604		1,261,500		(6,001		)	475,500		(1,087		)
Interest rate lock commitments	944,918		12,561		622,906		3,822		—		—			—		—
Total stand-alone derivative instruments	4,234,276		112,208		3,389,146		42,846		2,936,818		(70,325		)	2,419,779		(36,965		)
Total	$	4,234,276	$	112,208	$	3,389,146	$	42,846	$	2,936,937	$	(70,330	)	$	2,419,933	$	(36,974	)

⁽¹⁾ Derivative instruments designated to hedge fixed-rate commercial real estate loans.

⁽²⁾ These portfolio swaps are not designated as hedging instruments under ASC Topic 815.

Amounts included in other operating income in the consolidated statements of operations related to derivative financial instruments were as follows (in thousands):

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2016			2015			2016		2015
Derivative instruments designated as hedges of fair value:
Interest rate swap contracts	$	3		$	4		$	3	$	4
Stand-alone derivative instruments:
Interest rate swap contracts	5,296			8,614			5,260		8,623
Interest rate options contracts	(36		)	—			—		—
Foreign exchange contracts	1,362			30			1,362		91
Spot foreign exchange contracts	6			14			6		182
Mortgage related derivatives	(8,118		)	(9,411		)	31,653		(9,408		)
Total stand-alone derivative instruments	(1,490		)	(753		)	38,281		(512		)
Total	$	(1,487	)	$	(749	)	$	38,284	$	(508	)

Methods and assumptions used by the Company in estimating the fair value of its interest rate swaps are discussed in Note 13 to consolidated financial statements.

Certain instruments and transactions subject to an agreement similar to a master netting arrangement are eligible for offset in the consolidated balance sheet. The instruments and transactions would include derivatives, sale and repurchase agreements and reverse sale and repurchase agreements, and securities borrowing and securities lending arrangements. The Company’s derivative transactions with financial institution counterparties are generally executed under International Swaps and Derivative Association (“ISDA”) master agreements which include “right of set-off” provisions. Under these agreements, there is generally a legally enforceable right to offset recognized amounts, and there may be an intention to settle such amounts on a net basis. The Company, however, does not generally offset such financial instruments for financial reporting purposes.

Information about the Company's financial instruments that are eligible for offset in the consolidated balance sheet as of September 30, 2016 is summarized below (in thousands):

	Financial Assets						Financial Liabilities
	Gross Amount Recognized		Gross Amount Offset		Net Amount Recognized		Gross Amount Recognized		Gross Amount Offset		Net Amount Recognized
Derivatives:
Interest rate swap contracts, caps and floors	$	652	$	—	$	652	$	50,047	$	—	$	50,047
Foreign exchange contracts	2,850		—		2,850		1,551		—		1,551
Mortgage related derivatives	46,008		—		46,008		16,917		—		16,917
Total derivatives	49,510		—		49,510		68,515		—		68,515
Repurchase agreements	—		—		—		256,569		—		256,569
Total	$	49,510	$	—	$	49,510	$	325,084	$	—	$	325,084

	Financial Assets									Financial Liabilities
	Net Amount Recognized		Financial Instruments			Collateral		Net Amount		Net Amount Recognized		Financial Instruments			Collateral			Net Amount
Derivatives:
Counterparty A	$	35,142	$	(15,868	)	$	—	$	19,274	$	15,868	$	(15,868	)	$	—		$	—
Counterparty B	309		(309		)	—		—		11,098		(309		)	(10,789		)	—
Counterparty C	7,740		(7,740		)	—		—		17,344		(7,740		)	(9,604		)	—
Other counterparties	6,319		(6,296		)	—		23		24,205		(6,296		)	(17,886		)	23
Total derivatives	49,510		(30,213		)	—		19,297		68,515		(30,213		)	(38,279		)	23
Repurchase agreements	—		—			—		—		256,569		—			(256,569		)	—
Total	$	49,510	$	(30,213	)	$	—	$	19,297	$	325,084	$	(30,213	)	$	(294,848	)	$	23

Information about the Company's financial instruments that are eligible for offset in the consolidated balance sheet as of December 31, 2015 is summarized below (in thousands):

	Financial Assets						Financial Liabilities
	Gross Amount Recognized		Gross Amount Offset		Net Amount Recognized		Gross Amount Recognized		Gross Amount Offset		Net Amount Recognized
Derivatives:
Interest rate swap contracts, caps and floors	$	5,698	$	—	$	5,698	$	31,446	$	—	$	31,446
Foreign exchange contracts	2,728		—		2,728		1,805		—		1,805
Mortgage related derivatives	1,636		—		1,636		1,087		—		1,087
Total derivatives	10,062		—		10,062		34,338		—		34,338
Repurchase agreements	—		—		—		201,207		—		201,207
Total	$	10,062	$	—	$	10,062	$	235,545	$	—	$	235,545

	Financial Assets									Financial Liabilities
	Net Amount Recognized		Financial Instruments			Collateral		Net Amount		Net Amount Recognized		Financial Instruments			Collateral			Net Amount
Derivatives:
Counterparty A	$	3,810	$	(3,810	)	$	—	$	—	$	11,137	$	(3,810	)	$	(7,327	)	$	—
Counterparty B	6		(6		)	—		—		7,808		(6		)	(7,802		)	—
Counterparty C	3,477		(3,477		)	—		—		4,963		(3,477		)	(1,486		)	—
Other counterparties	2,769		(2,230		)	—		539		10,430		(2,230		)	(8,034		)	166
Total derivatives	10,062		(9,523		)	—		539		34,338		(9,523		)	(24,649		)	166
Repurchase agreements	—		—			—		—		201,207		—			(201,207		)	—
Total	$	10,062	$	(9,523	)	$	—	$	539	$	235,545	$	(9,523	)	$	(225,856	)	$	166

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Operating Segments

9 Months Ended

Sep. 30, 2016

Segment Reporting [Abstract]

Operating Segments

Operating Segments

The Company's operations consist of three reportable operating segments: Banking, Leasing and Mortgage Banking. The Company offers different products and services through its three segments. The accounting policies of the segments are generally the same as those of the consolidated company.

The Banking Segment generates its revenues primarily from its lending, deposit gathering and fee business activities. The profitability of this segment's operations depends primarily on its net interest income after provision for credit losses, which is the difference between interest earned on interest earning assets and interest paid on interest bearing liabilities less provision for credit losses.  The provision for credit losses is dependent on changes in the Banking Segment's loan portfolio and management’s assessment of the collectability of the loan portfolio as well as prevailing economic and market conditions.  The Banking Segment is also subject to an extensive system of laws and regulations that are intended primarily for the protection of depositors and other customers, federal deposit insurance funds and the banking system as a whole.  These laws and regulations govern such areas as capital, permissible activities, allowance for loan and lease losses, loans and investments, and rates of interest that can be charged on loans. 

The Leasing Segment generates its revenues through lease originations and related services offered through the Company's leasing subsidiaries, LaSalle Systems Leasing, Inc., Celtic Leasing Corp. and MB Equipment Finance, LLC. The leasing subsidiaries invest directly in equipment that the Company leases (referred to as direct finance, leveraged or operating leases) to "Fortune 1000," middle-market companies and healthcare providers located throughout the United States. The lease portfolio is made up of various kinds of equipment, generally technology related, such as computer systems, satellite equipment, medical equipment and general manufacturing, industrial, construction and transportation equipment. The leasing subsidiaries also specialize in selling third party equipment maintenance contracts to large companies.

The Mortgage Banking Segment originates residential mortgage loans for sale to investors and for the Company's portfolio through its retail and third party originator channels. This segment also services residential mortgage loans for various investors and for loans owned by the Company. The Mortgage Banking Segment is also subject to an extensive system of laws and regulations that are intended primarily for the protection of customers.

Net interest income for the Leasing and Mortgage Banking segments include adjustments based on the Company's internal funds transfer pricing model. Non-interest income for the Leasing Segment includes income on loans originated for the sole purpose of funding equipment purchases related to leases at the Company's lease subsidiaries.

The following tables present summary financial information for the reportable segments (in thousands):

	Banking		Leasing		Mortgage Banking		Consolidated
Three months ended September 30, 2016
Net interest income	$	119,685	$	2,168	$	8,918	$	130,771
Provision for credit losses	4,394		1,964		191		6,549
Non-interest income	40,533		18,759		49,095		108,387
Non-interest expense (1)	117,211		12,604		40,570		170,385
Income tax expense	8,420		2,484		6,901		17,805
Net income	$	30,193	$	3,875	$	10,351	$	44,419
Total assets	$	16,453,379	$	1,126,847	$	1,761,656	$	19,341,882
Three months ended September 30, 2015
Net interest income	$	104,714	$	2,832	$	8,423	$	115,969
Provision for credit losses	4,965		242		151		5,358
Non-interest income	31,572		19,987		30,692		82,251
Non-interest expense (1)	88,276		11,382		34,608		134,266
Income tax expense	12,178		4,398		1,742		18,318
Net income	$	30,867	$	6,797	$	2,614	$	40,278
Total assets	$	12,759,341	$	956,433	$	1,234,327	$	14,950,101

⁽¹⁾  Includes merger related and repositioning expenses of $11.4 million and $389 thousand in the Banking Segment for the three months ended September 30, 2016 and 2015, respectively.

	Banking		Leasing		Mortgage Banking		Consolidated
Nine months ended September 30, 2016
Net interest income	$	341,445	$	7,002	$	24,230	$	372,677
Provision for credit losses	14,390		2,045		506		16,941
Non-interest income	112,221		53,670		116,189		282,080
Non-interest expense (1)	307,733		35,916		110,442		454,091
Income tax expense	36,120		8,872		11,788		56,780
Net income	$	95,423	$	13,839	$	17,683	$	126,945
Total assets	$	16,453,379	$	1,126,847	$	1,761,656	$	19,341,882
Nine months ended September 30, 2015
Net interest income	$	313,192	$	8,762	$	21,883	$	343,837
Provision for credit losses	12,783		1,598		247		14,628
Non-interest income	94,197		61,383		90,888		246,468
Non-interest expense (1)	271,248		34,866		100,809		406,923
Income tax expense	35,509		13,218		4,686		53,413
Net income	$	87,849	$	20,463	$	7,029	$	115,341
Total assets	$	12,759,341	$	956,433	$	1,234,327	$	14,950,101

⁽¹⁾  Includes merger related and repositioning expenses of $17.2 million and $9.6 million in the Banking Segment for the nine months endedSeptember 30, 2016 and 2015, respectively.

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Preferred Stock

9 Months Ended

Sep. 30, 2016

Equity [Abstract]

Preferred Stock

Preferred Stock

On August 18, 2014, in connection with the Taylor Capital merger, the Company issued one share of its Perpetual Non-Cumulative Preferred Stock, Series A (“Company Series A Preferred Stock”), in exchange for each of the 4,000,000 outstanding shares of Taylor Capital’s Perpetual Non-Cumulative Preferred Stock, Series A. Holders of the Company Series A Preferred Stock are entitled to receive, when as and if declared by the Company’s board of directors, non-cumulative cash dividends on the liquidation preference amount, which is $25 per share, at a rate of 8.00% per annum, payable quarterly. The Company Series A Preferred Stock is callable in February 2018. The Company Series A Preferred Stock is included in Tier 1 capital for regulatory capital purposes.

On August 24, 2016, in connection with the American Chartered merger, the Company issued one share of its Cumulative Voting Convertible Preferred Stock, Series B ("Company Series B Preferred Stock"), in exchange for each of the 525 shares of American Chartered's Series D Preferred Stock outstanding immediately prior to the merger whose holders did not elect to receive the same consideration in the Merger as holders of American Chartered Common Stock, based on the number of shares of American Chartered Common Stock into which each such share of American Chartered Series D Preferred Stock would otherwise then be convertible. Holders of the Company Series B Preferred Stock are entitled to receive cumulative cash dividends on the liquidation preference amount, which is $1,000 per share, at a rate of 8.00% per annum, have the right to vote on all matters upon which holders of the Company's common stock are entitled to vote and have the right to convert each share into shares of the Company's common stock at any time. The Company Series B Preferred stock has a mandatory conversion date of September 20, 2017. The Company Series B Preferred Stock is included in Tier 2 capital for regulatory capital purposes.

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New Authoritative Accounting Guidance (Policies)

9 Months Ended

Sep. 30, 2016

Accounting Changes and Error Corrections [Abstract]

New Authoritative Accounting Guidance

ASC Topic 810 "Consolidation." New authoritative accounting guidance under ASC Topic 810, "Consolidation" amended prior guidance over the consolidation of certain legal entities. The new authoritative guidance modifies the evaluation of whether limited partnerships and similar legal entities are variable interest entities or voting interest entities, eliminates the presumption that a general partner should consolidate a limited partnership, affects the consolidation analysis of reporting entities that are involved with variable interest entities and provides a scope exception from consolidation guidance for reporting entities with interests in legal entities that are required to comply with or operate in accordance with requirements similar to those for registered money market funds. The Company adopted this new authoritative guidance on January 1, 2016, and it did not have an impact on the Company's statements of operations or financial condition.

ASC Topic 835 "Interest." New authoritative accounting guidance under ASC Topic 835, "Interest" amended prior guidance to simplify the presentation of debt issuance costs. The new authoritative guidance requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The Company adopted this new authoritative guidance on January 1, 2016, and it did not have an impact on the Company's statements of operations or financial condition.

ASC Topic 805 "Business Combinations." New authoritative accounting guidance under ASC Topic 805, "Business Combinations" amended prior guidance to require that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. The new guidance requires that the acquirer record, in the same period’s financial statements, the effect on earnings of changes in depreciation, amortization, or other income effects, if any, as a result of the change to the provisional amounts, calculated as if the accounting had been completed at the acquisition date. It also requires an entity to present separately on the face of the statement of operations or disclose in the notes the portion of the amount recorded in current-period earnings by line items that would have been recorded in previous reporting periods if the adjustment to the provisional amounts had been recognized as of the acquisition date. The Company adopted this new authoritative guidance on January 1, 2016, and it did not have an impact on the Company's statements of operations or financial condition.

ASC Topic 606 "Revenue from Contracts with Customers." New authoritative accounting guidance under ASC Topic 606, "Revenue from Contracts with Customers" amended prior guidance to require an entity to 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 and to provide clarification on identifying performance obligations and licensing implementation guidance. The new authoritative guidance was initially effective for reporting periods after January 1, 2017 but was deferred to January 1, 2018. The Company is evaluating the new guidance but does not expect it to have a significant impact on the Company's statements of operations or financial condition.

ASC Topic 825 "Financial Instruments." New authoritative accounting guidance under ASC Topic 825 "Financial Instruments" amended prior guidance to require equity investments (except those accounted for under the equity method of accounting) to be measured at fair value with changes in fair value recognized in net income. An entity may choose to measure equity investments that do not have readily determinable fair values at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or similar investment of the same issuer. The new guidance simplifies the impairment assessment of equity investments without readily determinable fair values, requires public entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes, requires an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from changes in the instrument-specific credit risk when the entity has selected the fair value option for financial instruments and requires separate presentation of financial assets and liabilities by measurement category and form of financial asset. The new authoritative guidance will be effective for reporting periods after January 1, 2018 and is not expected to have a significant impact on the Company's statements of operations or financial condition.

ASC Topic 405 "Liabilities-Extinguishment of Liabilities." New authoritative accounting guidance under ASC Topic 405, "Liabilities-Extinguishment of Liabilities" amended prior guidance to clarify that liabilities related to the sale of prepaid store-value products within the scope of this guidance are financial liabilities and that breakage for those liabilities are to be accounted for consistent with the breakage guidance in ASC Topic 606 "Revenue from Contracts with Customers." The new authoritative guidance will be effective for reporting periods after January 1, 2018. The Company is evaluating the new guidance but does not expect it to have a significant impact on the Company's statements of operations or financial condition.

ASC Topic 842 "Leases." New authoritative accounting guidance under ASC Topic 842 "Leases" amended prior guidance to require lessees to recognize the assets and liabilities arising from all leases on the balance sheet. The new authoritative guidance defines a lease as a contract, or part of a contract, that conveys the right to control the use of identified property, plant, or equipment (an identified asset) for a period of time in exchange for consideration. In addition, the qualifications for a sale and leaseback transaction have been amended. The new authoritative guidance also requires qualitative and quantitative disclosures bylessees and lessors to meet the objective of enabling users of financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases. In transition, lessees and lessors are required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. The new authoritative guidance will be effective for reporting periods after January 1, 2019. The Company is evaluating the new guidance and its impact on the Company's statements of operations and financial condition.

ASC Topic 815 "Derivatives and Hedging." New authoritative accounting guidance under ASC Topic 815 "Derivatives and Hedging" amended prior guidance to clarify that a change in the counterparty to a derivative instrument that has been designated as the hedging instrument does not, in and of itself, require dedesignation of that hedging relationship provided that all other hedge accounting criteria continue to be met. An entity has an option to apply the amendments in this new authoritative guidance on either a prospective basis or a modified retrospective basis. The new authoritative guidance will be effective for reporting periods after January 1, 2017 and early adoption is permitted. This new authoritative guidance is not expected to have a significant impact on the Company's statements of operations or financial condition.

New authoritative accounting guidance under ASC Topic 815 "Derivatives and Hedging" amended prior guidance to clarify what steps are required when assessing whether the economic characteristics and risks of call (put) options are clearly and closely related to the economic characteristics and risks of their debt hosts, which is one of the criteria for bifurcating an embedded derivative. An entity is required to consider whether (1) the payoff is adjusted based on changes in an index, (2) the payoff is indexed to an underlying other than interest rates or credit risk, (3) the debt involves a substantial premium or discount, and (4) the call (put) option is contingently exercisable. An entity should apply this new authoritative guidance on a modified retrospective basis to existing debt instruments as of the beginning of the fiscal year for which the amendments are effective. The new authoritative guidance will be effective for reporting periods after January 1, 2017 and early adoption is permitted. This new authoritative guidance is not expected to have a significant impact on the Company's statements of operations or financial condition.

ASC Topic 323 "Investment - Equity Method and Joint Ventures." New authoritative accounting guidance under ASC Topic 323 "Investment - Equity Method and Joint Ventures" amended prior guidance to eliminate the requirement to retroactively adopt the equity method of accounting as a result of an increase in the level of ownership interest or degree of influence. The new authoritative guidance required that the equity method investor add the cost of acquiring the additional interest in the investee to the current basis of the investor’s previously held interest and adopt the equity method of accounting as of the date the investment becomes qualified for equity method accounting. The new authoritative guidance will be effective for reporting periods after January 1, 2017 and early adoption is permitted. This new authoritative guidance is not expected to have a significant impact on the Company's statements of operations or financial condition.

ASC Topic 718 "Compensation - Stock Compensation." New authoritative accounting guidance under ASC Topic 718 "Compensation - Stock Compensation" amended prior guidance on several aspects, including the income tax consequences, classification of awards as either equity or liability, and classification on the statement of cash flows. The new authoritative guidance allows for all excess tax benefits and tax deficiencies to be recognized as income tax benefit or expense in the income statement. The tax effects of exercised or vested awards should be treated as discrete items in the reporting period in which they occur. An entity also should recognize excess tax benefits regardless of whether the benefit reduces taxes payable in the current period. For the statement of cash flows, excess tax benefits should be classified along with other income tax cash flows as an operating activity, and cash paid by an employer when directly withholding shares for tax withholding purposes should be classified as a financing activity. The new authoritative guidance also allows an entity to make an entity-wide accounting policy election to either estimate the number of awards that are expected to vest or account for forfeitures when they occur. In addition, the threshold to qualify for equity classification permits withholding up to the maximum statutory tax rates in the applicable jurisdictions. The new authoritative guidance will be effective for reporting periods after January 1, 2017 and early adoption is permitted. The Company early adopted the new guidance in the third quarter of 2016, and as a result, recorded a $1.8 million tax benefit in the Company's statements of operations. The Company has also elected to account for forfeitures when they occur.

ASC Topic 326 "Financial Instruments - Credit Losses." New authoritative accounting guidance under ASC Topic 326 "Financial Instruments - Credit Losses" amended the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information for credit loss estimates. The measurement of expected credit losses is based on relevant information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. The new authoritative guidance also requires a financial asset (or a group of financial assets) measured at amortized cost basis to be presented at the net amount expected to be collected (net of the allowance for credit losses). In addition, the credit losses relating to available-for-sale debt securities should be recorded through an allowance for credit losses rather than a write-down. The new authoritative guidance will be effective for reporting periods after January 1, 2020. The Company is evaluating the new guidance and its impact on the Company's statements of operations or financial condition.

ASC Topic 230 "Statement of Cash Flows." New authoritative accounting guidance under ASC Topic 230 "Statement of Cash Flows" addresses eight specific cash flow classification issues with the objective of reducing the existing diversity in practice. The new authoritative guidance will be effective for reporting periods after January 1, 2018. This new authoritative guidance is not expected to have a significant impact on the Company's statements of operations or financial condition.

ASC Topic 740 "Income Taxes." New authoritative accounting guidance under ASC Topic 740 "Income Taxes" amends prior guidance to require an entity to recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. The new authoritative guidance will be effective for reporting periods after January 1, 2018. The Company is evaluating the new guidance and its impact on the Company's statements of operations or financial condition.

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Earnings Per Common Share (Tables)

9 Months Ended

Sep. 30, 2016

Earnings Per Share [Abstract]

Reconciliation of the Number of Shares Used in the Calculation of Basic and Diluted Earnings Per Common Share

The following table presents a reconciliation of the number of shares used in the calculation of basic and diluted earnings per common share (amounts in thousands, except share and per share data).

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2016		2015		2016		2015
Distributed earnings allocated to common stock	$	16,114	$	12,733	$	42,984	$	36,227
Undistributed earnings	28,305		27,545		83,961		79,114
Net income	44,419		40,278		126,945		115,341
Less: preferred stock dividends	2,004		2,000		6,004		6,000
Net income available to common stockholders for basic earnings per common share	42,415		38,278		120,941		109,341
Plus: preferred stock dividends on convertible preferred stock	4		—		4		—
Less: earnings allocated to participating securities	2		2		6		5
Earnings allocated to common stockholders for diluted earnings per common share	$	42,417	$	38,276	$	120,939	$	109,336
Weighted average shares outstanding for basic earnings per common share	77,506,885		74,297,281		74,780,943		74,478,164
Dilutive effect of equity awards	1,176,285		732,546		946,637		676,421
Weighted average shares outstanding for diluted earnings per common share	78,683,170		75,029,827		75,727,580		75,154,585
Basic earnings per common share	$	0.55	$	0.52	$	1.62	$	1.47
Diluted earnings per common share	0.54		0.51		1.60		1.45

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Business Combinations (Tables)

9 Months Ended

Sep. 30, 2016

Business Combinations [Abstract]

Schedule of Business Acquisitions

Estimated fair values of the assets acquired and liabilities assumed in the American Chartered transaction, as of the closing date of the transaction were as follows (in thousands):

	August 24, 2016
ASSETS
Cash and cash equivalents	$	93,307
Investment securities available for sale	505,564
Non-marketable securities - FRB and FHLB Stock	16,000
Loans	1,952,826
Premises and equipment	39,061
Cash surrender value of life insurance	59,917
Goodwill	268,758
Other intangibles	25,500
Other real estate owned	4,148
Other assets	27,615
Total assets	$	2,992,696
LIABILITIES
Deposits	$	2,389,423
Short-term borrowings	48,305
Long-term borrowings	16,000
Junior subordinated notes issued to capital trusts	28,075
Accrued expenses and other liabilities	23,477
Total liabilities	$	2,505,280
Total identifiable net assets	$	487,416
Consideration:
Market value of common stock at $39.28 per share at August 24, 2016 (9,744,636 shares of common stock issued)	$	382,769
Series B preferred stock at $2,337.97 per share at August 24, 2016 (525 shares of preferred stock issued) (1)	1,227
Stock-based compensation attributed to pre-business combination service	1,103
Cash paid	102,317
Total fair value of consideration, excluding Series B preferred stock	$	487,416

Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period

The following table presents the acquired loans as of the acquisition date (in thousands):

	Purchased Credit-Impaired Loans		Purchased Non-Credit-Impaired Loans
Fair value	$	24,575	$	1,928,251
Gross contractual amounts receivable	31,408		2,207,765
Best estimate of contractual cash flows not expected to be collected (1)	5,048		129,027
Best estimate of contractual cash flows expected to be collected	26,360		2,078,738

⁽¹⁾  Includes interest payments not expected to be collected due to loan prepayments as well as principal and interest payments not expected to be collected due to customer default.

Summary of Pro Forma Information

The following table provides the unaudited pro forma information for the results of operations for the nine months ended September 30, 2016 and 2015, as if the acquisition had occurred January 1, 2015. The pro forma results combine the historical results of American Chartered into the Company's consolidated statement of operations including the impact of certain acquisition accounting adjustments including loan discount accretion, investment securities discount accretion, intangible assets amortization, deposit premium accretion and borrowing discount amortization. The pro forma results have been prepared for comparative purposes only and are not necessarily indicative of the results that would have been obtained had the acquisition actually occurred on January 1, 2015. No assumptions have been applied to the pro forma results of operations regarding possible revenue enhancements, provision for credit losses, expense efficiencies or asset dispositions. The merger related expenses that have been recognized are included in net income in the table below.

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2016		2015		2016		2015
(in thousands)
Total revenues (net interest income plus non-interest income)	$	256,866	$	228,099	$	731,987	$	678,735
Net income	48,432		50,581		147,078		141,751

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Investment Securities (Tables)

9 Months Ended

Sep. 30, 2016

Investments, Debt and Equity Securities [Abstract]

Summary of Amortized Cost and Fair Value of Investment Securities

Amortized cost and fair value of investment securities were as follows as of the dates indicated (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
September 30, 2016
Available for Sale
U.S. Government sponsored agencies and enterprises	$	53,456	$	512	$	—		$	53,968
States and political subdivisions	383,041		27,914		(218		)	410,737
Residential mortgage-backed securities	1,066,834		10,948		(1,445		)	1,076,337
Commercial mortgage-backed securities	93,962		3,203		(172		)	96,993
Corporate bonds	208,940		2,167		(914		)	210,193
Equity securities	10,932		196		—			11,128
Total Available for Sale	1,817,165		44,940		(2,749		)	1,859,356
Held to Maturity
States and political subdivisions	939,491		53,682		(33		)	993,140
Residential mortgage-backed securities	175,771		6,927		—			182,698
Total Held to Maturity	1,115,262		60,609		(33		)	1,175,838
Total	$	2,932,427	$	105,549	$	(2,782	)	$	3,035,194
December 31, 2015
Available for Sale
U.S. Government sponsored agencies and enterprises	$	63,805	$	806	$	—		$	64,611
States and political subdivisions	373,285		23,083		(1		)	396,367
Residential mortgage-backed securities	759,816		7,363		(3,630		)	763,549
Commercial mortgage-backed securities	128,509		1,839		(241		)	130,107
Corporate bonds	222,784		815		(3,971		)	219,628
Equity securities	10,757		4		—			10,761
Total Available for Sale	1,558,956		33,910		(7,843		)	1,585,023
Held to Maturity
States and political subdivisions	1,016,519		36,874		(638		)	1,052,755
Residential mortgage-backed securities	214,291		7,721		—			222,012
Total Held to Maturity	1,230,810		44,595		(638		)	1,274,767
Total	$	2,789,766	$	78,505	$	(8,481	)	$	2,859,790

Unrealized Losses on Investment Securities and the Fair Value of the Related Securities

Unrealized losses on investment securities by length of time in a continuous unrealized loss position and the fair value of the related securities at September 30, 2016 were as follows (in thousands):

	Less Than 12 Months					12 Months or More					Total
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
	Value		Losses			Value		Losses			Value		Losses
Available for Sale
States and political subdivisions	$	20,526	$	(218	)	$	—	$	—		$	20,526	$	(218	)
Residential mortgage-backed securities	374,312		(1,214		)	27,699		(231		)	402,011		(1,445		)
Commercial mortgage-backed securities	71		(1		)	11,664		(171		)	11,735		(172		)
Corporate bonds	9,834		(155		)	19,950		(759		)	29,784		(914		)
Total Available for Sale	404,743		(1,588		)	59,313		(1,161		)	464,056		(2,749		)
Held to Maturity
States and political subdivisions	31,142		(32		)	387		(1		)	31,529		(33		)
Total	$	435,885	$	(1,620	)	$	59,700	$	(1,162	)	$	495,585	$	(2,782	)

Unrealized losses on investment securities by length of time in a continuous unrealized loss position and the fair value of the related securities at December 31, 2015 were as follows (in thousands):

	Less Than 12 Months					12 Months or More					Total
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
	Value		Losses			Value		Losses			Value		Losses
Available for Sale
States and political subdivisions	$	219	$	(1	)	$	—	$	—		$	219	$	(1	)
Residential mortgage-backed securities	357,877		(2,835		)	43,566		(795		)	401,443		(3,630		)
Commercial mortgage-backed securities	2,324		(5		)	11,809		(236		)	14,133		(241		)
Corporate bonds	73,774		(1,164		)	18,286		(2,807		)	92,060		(3,971		)
Total Available for Sale	434,194		(4,005		)	73,661		(3,838		)	507,855		(7,843		)
Held to Maturity
States and political subdivisions	66,152		(519		)	6,190		(119		)	72,342		(638		)
Total	$	500,346	$	(4,524	)	$	79,851	$	(3,957	)	$	580,197	$	(8,481	)

Summary of Net Gains (Losses) on Investment Securities Available for Sale

Net gains (losses) recognized on investment securities available for sale were as follows (in thousands):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2016		2015		2016			2015
Realized gains	$	—	$	371	$	323		$	1,454
Realized losses	—		—		(54		)	(1,627		)
Net gains (losses)	$	—	$	371	$	269		$	(173	)

Schedule of Remaining Contractual Maturities of Securities Included in the Securities Portfolio

The amortized cost and fair value of investment securities as of September 30, 2016 by contractual maturity are shown below. Maturities may differ from contractual maturities in mortgage-backed securities because the mortgages underlying the securities may be called or repaid without any penalties. Therefore, mortgage-backed securities are not included in the maturity categories in the following maturity summary.

	Amortized		Fair
(In thousands)	Cost		Value
Available for sale:
Due in one year or less	$	81,215	$	81,620
Due after one year through five years	267,485		273,115
Due after five years through ten years	44,899		46,964
Due after ten years	251,838		273,199
Equity securities	10,932		11,128
Residential and commercial mortgage-backed securities	1,160,796		1,173,330
	1,817,165		1,859,356
Held to maturity:
Due in one year or less	87,409		87,524
Due after one year through five years	146,995		151,557
Due after five years through ten years	159,780		171,871
Due after ten years	545,307		582,188
Residential mortgage-backed securities	175,771		182,698
	1,115,262		1,175,838
Total	$	2,932,427	$	3,035,194

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Loans (Tables)

9 Months Ended

Sep. 30, 2016

Receivables [Abstract]

Schedule of Composition of Loans

Loans consist of the following at (in thousands):

	September 30, 2016		December 31, 2015
Commercial loans	$	4,385,812	$	3,616,286
Commercial loans collateralized by assignment of lease payments	1,873,380		1,779,072
Commercial real estate	3,794,801		2,695,676
Residential real estate	998,827		628,169
Construction real estate	451,023		252,060
Indirect vehicle	522,271		384,095
Home equity	275,288		216,573
Other consumer loans	77,956		80,661
Total loans, excluding purchased credit-impaired loans	12,379,358		9,652,592
Purchased credit-impaired loans	161,338		141,406
Total loans	$	12,540,696	$	9,793,998

Contractual Aging of the Recorded Investment in Past Due Loans by Class of Loans

The following table presents the contractual aging of the recorded investment in past due loans by class of loans as of September 30, 2016 and December 31, 2015 (in thousands):

	Current		30-59 Days Past Due		60-89 Days Past Due		Loans Past Due 90 Days or More		Total Past Due		Total
September 30, 2016
Commercial	$	4,376,819	$	2,649	$	104	$	6,240	$	8,993	$	4,385,812
Commercial collateralized by assignment of lease payments	1,855,322		12,141		4,672		1,245		18,058		1,873,380
Commercial real estate:
Healthcare	572,228		—		—		—		—		572,228
Industrial	854,045		298		1,289		—		1,587		855,632
Multifamily	549,486		141		366		113		620		550,106
Retail	522,696		333		235		453		1,021		523,717
Office	416,965		1,336		49		—		1,385		418,350
Other	871,881		1,646		532		709		2,887		874,768
Residential real estate	986,386		2,347		1,739		8,355		12,441		998,827
Construction real estate	451,023		—		—		—		—		451,023
Indirect vehicle	518,881		2,301		716		373		3,390		522,271
Home equity	270,028		1,475		490		3,295		5,260		275,288
Other consumer	77,570		166		129		91		386		77,956
Total loans, excluding purchased credit-impaired loans	12,323,330		24,833		10,321		20,874		56,028		12,379,358
Purchased credit-impaired loans	92,346		1,108		5,848		62,036		68,992		161,338
Total loans	$	12,415,676	$	25,941	$	16,169	$	82,910	$	125,020	$	12,540,696
Non-performing loan aging	$	31,009	$	373	$	1,801	$	20,726	$	22,900	$	53,909
December 31, 2015
Commercial	$	3,586,372	$	22,956	$	97	$	6,861	$	29,914	$	3,616,286
Commercial collateralized by assignment of lease payments	1,758,839		3,399		5,902		10,932		20,233		1,779,072
Commercial real estate:
Healthcare	476,939		—		—		—		—		476,939
Industrial	400,182		—		—		757		757		400,939
Multifamily	399,333		622		88		934		1,644		400,977
Retail	410,958		6,189		7,411		180		13,780		424,738
Office	223,935		58		—		5,189		5,247		229,182
Other	760,530		622		82		1,667		2,371		762,901
Residential real estate	612,573		5,193		1,729		8,674		15,596		628,169
Construction real estate	252,060		—		—		—		—		252,060
Indirect vehicle	380,899		2,085		698		413		3,196		384,095
Home equity	207,818		1,774		1,398		5,583		8,755		216,573
Other consumer	80,225		254		84		98		436		80,661
Total loans, excluding purchased credit-impaired loans	9,550,663		43,152		17,489		41,288		101,929		9,652,592
Purchased credit-impaired loans	81,250		3,311		4,439		52,406		60,156		141,406
Total loans	$	9,631,913	$	46,463	$	21,928	$	93,694	$	162,085	$	9,793,998
Non-performing loan aging	$	44,290	$	9,827	$	9,367	$	41,177	$	60,371	$	104,661

Recorded Investment in Non-accrual Loans and Loans Past Due Ninety Days or More and Still Accruing by Class of Loans

The following table presents the recorded investment in non-accrual loans and loans past due ninety days or more and still accruing by class of loans, excluding purchased credit-impaired loans, as of September 30, 2016 and December 31, 2015 (in thousands):

	September 30, 2016				December 31, 2015
			Loans past due				Loans past due
	Non-accrual		90 days or more and still accruing		Non-accrual		90 days or more and still accruing
Commercial	$	8,583	$	1,166	$	24,689	$	42
Commercial collateralized by assignment of lease payments	4,996		153		7,027		5,318
Commercial real estate:
Healthcare	—		—		—		—
Industrial	278		—		1,136		—
Multifamily	2,648		—		3,415		—
Office	447		—		4,496		693
Retail	607		—		17,594		—
Other	531		144		1,544		195
Residential real estate	16,781		220		17,951		253
Construction real estate	—		—		—		—
Indirect vehicle	1,955		—		2,046		—
Home equity	15,300		—		18,156		—
Other consumer	9		91		11		95
Total	$	52,135	$	1,774	$	98,065	$	6,596

Risk Category of Loans by Class of Loans

The following tables present the risk category of loans by class of loans based on the most recent analysis performed, excluding purchased credit-impaired loans, as of September 30, 2016 and December 31, 2015 (in thousands):

	Pass		Special Mention		Substandard		Doubtful		Total
September 30, 2016
Commercial	$	4,163,243	$	131,163	$	91,406	$	—	$	4,385,812
Commercial collateralized by assignment of lease payments	1,859,012		5,504		8,864		—		1,873,380
Commercial real estate:
Healthcare	555,166		17,062		—		—		572,228
Industrial	831,090		23,751		791		—		855,632
Multifamily	546,183		312		3,611		—		550,106
Retail	514,299		8,646		772		—		523,717
Office	409,124		5,086		4,140		—		418,350
Other	828,578		26,085		20,105		—		874,768
Construction real estate	451,023		—		—		—		451,023
Total	$	10,157,718	$	217,609	$	129,689	$	—	$	10,505,016
December 31, 2015
Commercial	$	3,373,943	$	115,548	$	126,795	$	—	$	3,616,286
Commercial collateralized by assignment of lease payments	1,760,674		4,367		14,031		—		1,779,072
Commercial real estate:
Healthcare	472,599		4,340		—		—		476,939
Industrial	380,200		19,011		1,728		—		400,939
Multifamily	396,117		595		4,265		—		400,977
Retail	393,543		13,310		17,885		—		424,738
Office	216,584		3,797		8,801		—		229,182
Other	730,713		6,193		25,995		—		762,901
Construction real estate	252,060		—		—		—		252,060
Total	$	7,976,433	$	167,161	$	199,500	$	—	$	8,343,094

Recorded Investment in Loan Classes Based on Payment Activity

The following table presents the recorded investment in those loan classes based on payment activity, excluding purchased credit-impaired loans, as of September 30, 2016 and December 31, 2015 (in thousands):

	Performing		Non-performing		Total
September 30, 2016
Residential real estate	$	981,826	$	17,001	$	998,827
Indirect vehicle	520,316		1,955		522,271
Home equity	259,988		15,300		275,288
Other consumer	77,856		100		77,956
Total	$	1,839,986	$	34,356	$	1,874,342
December 31, 2015
Residential real estate	$	609,965	$	18,204	$	628,169
Indirect vehicle	382,049		2,046		384,095
Home equity	198,417		18,156		216,573
Other consumer	80,555		106		80,661
Total	$	1,270,986	$	38,512	$	1,309,498

Loans Individually Evaluated for Impairment by Class of Loans

The following tables present loans individually evaluated for impairment by class of loans, excluding purchased credit-impaired loans, as of September 30, 2016 and December 31, 2015 (in thousands):

	September 30, 2016
									Three Months Ended				Nine Months Ended
	Unpaid Principal Balance		Recorded Investment		Partial Charge-offs		Allowance for Loan Losses Allocated		Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
With no related allowance recorded:
Commercial	$	1,808	$	1,808	$	—	$	—	$	1,871	$	—	$	2,377	$	—
Commercial collateralized by assignment of lease payments	1,161		794		367		—		1,141		27		1,026		27
Commercial real estate:
Healthcare	—		—		—		—		—		—		—		—
Industrial	—		—		—		—		—		—		536		—
Multifamily	1,981		1,981		—		—		2,334		—		2,362		—
Retail	2,683		943		1,740		—		949		—		2,577		—
Office	—		—		—		—		—		—		342		—
Other	—		—		—		—		—		—		80		—
Residential real estate	—		—		—		—		—		—		—		—
Construction real estate	—		—		—		—		—		—		—		—
Indirect vehicle	218		125		93		—		277		—		292		—
Home equity	—		—		—		—		—		—		192		—
Other consumer	—		—		—		—		—		—		—		—
With an allowance recorded:
Commercial	17,476		17,476		—		5,401		19,180		—		26,513		—
Commercial collateralized by assignment of lease payments	7,260		7,260		—		3,933		5,086		—		3,201		18
Commercial real estate:
Healthcare	—		—		—		—		—		—		—		—
Industrial	—		—		—		—		—		—		—		—
Multifamily	—		—		—		—		—		—		—		—
Retail	3,606		3,606		—		363		3,612		—		7,911		—
Office	—		—		—		—		—		—		995		—
Other	—		—		—		—		—		—		314		—
Residential real estate	15,117		13,268		1,849		2,394		13,325		—		13,068		—
Construction real estate	—		—		—		—		—		—		—		—
Indirect vehicle	—		—		—		—		—		—		—		—
Home equity	29,688		27,276		2,412		3,252		27,443		—		28,635		—
Other consumer	—		—		—		—		—		—		—		—
Total	$	80,998	$	74,537	$	6,461	$	15,343	$	75,218	$	27	$	90,421	$	45

	December 31, 2015
									Year Ended
	Unpaid Principal Balance		Recorded Investment		Partial Charge-offs		Allowance for Loan Losses Allocated		Average Recorded Investment		Interest Income Recognized
With no related allowance recorded:
Commercial	$	11,253	$	11,253	$	—	$	—	$	6,628	$	—
Commercial collateralized by assignment of lease payments	3,453		2,949		504		—		1,035		54
Commercial real estate:
Healthcare	—		—		—		—		—		—
Industrial	820		757		63		—		3,467		—
Multifamily	575		575		—		—		1,540		17
Retail	7,872		6,131		1,741		—		2,768		—
Office	1,608		1,031		577		—		1,663		—
Other	—		—		—		—		965		—
Residential real estate	970		970		—		—		717		—
Construction real estate	—		—		—		—		—		—
Indirect vehicle	—		—		—		—		—		—
Home equity	927		927		—		—		1,000		—
Other consumer	—		—		—		—		—		—
With an allowance recorded:
Commercial	23,394		23,394		—		7,523		18,820		—
Commercial collateralized by assignment of lease payments	3,297		3,297		—		1,790		4,013		104
Commercial real estate:
Healthcare	—		—		—		—		—		—
Industrial	—		—		—		—		228		—
Multifamily	2,155		2,155		—		17		3,307		27
Retail	16,034		16,034		—		4,926		8,885		—
Office	2,929		2,929		—		1,717		2,457		—
Other	592		592		—		199		9,629		—
Residential real estate	12,950		12,769		181		2,634		13,484		—
Construction real estate	—		—		—		—		214		—
Indirect vehicle	119		119		—		—		287		—
Home equity	28,696		28,583		113		3,131		27,747		—
Other consumer	—		—		—		—		—		—
Total	$	117,644	$	114,465	$	3,179	$	21,937	$	108,854	$	202

Schedule of Loans That Have Been Restructured

The following table presents loans that were restructured during the three months ended September 30, 2016 (dollars in thousands):

	September 30, 2016
	Number of Loans	Pre-Modification Recorded Investment		Post-Modification Recorded Investment		Charge-offs and Specific Reserves
Performing:
Residential real estate	2	$	101	$	101	$	18
Home equity	2	102		102		12
Total	4	$	203	$	203	$	30
Non-Performing:
Commercial	3	$	5,874	$	5,874	$	1,490
Residential real estate	4	484		484		85
Indirect vehicle	7	34		34		17
Home equity	5	489		489		72
Total	19	$	6,881	$	6,881	$	1,664

The following table presents loans that were restructured during the nine months endedSeptember 30, 2016 (dollars in thousands):

	September 30, 2016
	Number of Loans	Pre-Modification Recorded Investment		Post-Modification Recorded Investment		Charge-offs and Specific Reserves
Performing:
Commercial	1	$	1,870	$	1,870	$	412
Residential real estate	2	101		101		18
Home equity	4	511		511		12
Total	7	$	2,482	$	2,482	$	442
Non-Performing:
Commercial	7	$	14,481	$	14,481	$	4,990
Residential real estate	6	639		639		85
Indirect vehicle	25	183		183		60
Home equity	28	3,600		3,600		138
Total	66	$	18,903	$	18,903	$	5,273

The following table presents loans that were restructured during the three months ended September 30, 2015 (dollars in thousands):

	September 30, 2015
	Number of Loans	Pre-Modification Recorded Investment		Post-Modification Recorded Investment		Charge-offs and Specific Reserves
Performing:
Home equity	4	$	477	$	477	$	—
Total	4	$	477	$	477	$	—
Non-Performing:
Indirect vehicle	7	$	45	$	45	$	16
Home equity	4	550		550		8
Total	11	$	595	$	595	$	24

The following table presents loans that were restructured during the nine months endedSeptember 30, 2015 (dollars in thousands):

	September 30, 2015
	Number of Loans	Pre-Modification Recorded Investment		Post-Modification Recorded Investment		Charge-offs and Specific Reserves
Performing:
Commercial	1	$	80	$	80	$	—
Home equity	16	4,290		4,290		—
Total	17	$	4,370	$	4,370	$	—
Non-Performing:
Commercial real estate:
Multifamily	1	$	334	$	334	$	—
Residential real estate	1	140		140		17
Indirect vehicle	13	75		75		23
Home equity	9	1,348		1,348		130
Total	24	$	1,897	$	1,897	$	170

Troubled Debt Restructuring Activity Rollforward

The following table presents the troubled debt restructurings activity during the nine months endedSeptember 30, 2016 (in thousands):

	Performing			Non-performing
Beginning balance	$	26,991		$	23,619
Additions	2,482			18,903
Charge-offs	—			(1,046		)
Principal payments, net	(2,145		)	(8,695		)
Removals	(1,655		)	(6,384		)
Transfer to other real estate owned	—			(112		)
Transfers in	3,677			789
Transfers out	(789		)	(3,677		)
Ending balance	$	28,561		$	23,397

Type of Financing Receivable Modifications and Restructuring

The following table presents the type of modification for loans that have been restructured during the nine months endedSeptember 30, 2016 (in thousands):

	September 30, 2016
	Extended
	Maturity,				Delay in
	Amortization		Extended		Payments or
	and Reduction		Maturity and/or		Reduction of
	of Interest Rate		Amortization		Interest Rate		Total
Commercial	$	—	$	14,481	$	1,870	$	16,351
Commercial collateralized by assignment of lease payments	—		—		—		—
Commercial real estate:
Healthcare	—		—		—		—
Industrial	—		—		—		—
Multifamily	—		—		—		—
Retail	—		—		—		—
Office	—		—		—		—
Other	—		—		—		—
Residential real estate	484		256		—		740
Construction real estate	—		—		—		—
Indirect vehicle	—		—		183		183
Home equity	3,220		820		71		4,111
Other consumer	—		—		—		—
Total	$	3,704	$	15,557	$	2,124	$	21,385

Allowance Activity for Credit Losses, Balance in Allowance for Credit Losses and Recorded Investment in Loans by Portfolio Segment

The following table presents the activity in the allowance for credit losses, balance in allowance for credit losses and recorded investment in loans by portfolio segment and based on impairment method as of September 30, 2016 and 2015 (in thousands):

	Commercial			Commercial collateralized  by assignment of lease payments		Commercial real estate		Residential real estate		Construction real estate		Indirect vehicle		Home equity			Other consumer			Unfunded commitments			Total
September 30, 2016
Allowance for credit losses:
Three Months Ended
Beginning balance	$	50,297		$	10,549	$	46,040	$	4,800	$	14,230	$	3,100	$	4,199		$	2,399		$	2,719		$	138,333
Charge-offs	1,341			367		529		290		7		838		376			409			—			4,157
Recoveries	665			3		324		45		50		436		65			86			—			1,674
Provision	(3,894		)	2,944		1,239		1,575		2,033		598		2,309			(407		)	152			6,549
Ending balance	$	45,727		$	13,129	$	47,074	$	6,130	$	16,306	$	3,296	$	6,197		$	1,669		$	2,871		$	142,399
Nine Months Ended
Beginning balance	$	39,316		$	10,434	$	45,475	$	5,734	$	15,113	$	2,418	$	7,374		$	2,276		$	3,368		$	131,508
Charge-offs	2,126			3,288		2,601		1,134		151		2,420		1,233			1,216			—			14,169
Recoveries	1,997			520		2,761		151		94		1,400		576			620			—			8,119
Provision	6,540			5,463		1,439		1,379		1,250		1,898		(520		)	(11		)	(497		)	16,941
Ending balance	$	45,727		$	13,129	$	47,074	$	6,130	$	16,306	$	3,296	$	6,197		$	1,669		$	2,871		$	142,399
Ending allowance balance attributable to loans:
Individually evaluated for impairment	$	5,401		$	3,933	$	363	$	2,394	$	—	$	—	$	3,252		$	—		$	737		$	16,080
Collectively evaluated for impairment	40,161			9,196		46,235		3,736		16,249		3,296		2,945			1,669			2,134			125,621
Acquired and accounted for under ASC 310-30 (1)	165			—		476		—		57		—		—			—			—			698
Total ending allowance balance	$	45,727		$	13,129	$	47,074	$	6,130	$	16,306	$	3,296	$	6,197		$	1,669		$	2,871		$	142,399
Loans:
Individually evaluated for impairment	$	19,284		$	8,054	$	6,530	$	13,268	$	—	$	125	$	27,276		$	—		$	—		$	74,537
Collectively evaluated for impairment	4,366,528			1,865,326		3,788,271		985,559		451,023		522,146		248,012			77,956			—			12,304,821
Acquired and accounted for under ASC 310-30 (1)	22,913			—		41,286		66,698		14,131		—		13,886			2,424			—			161,338
Total ending loans balance	$	4,408,725		$	1,873,380	$	3,836,087	$	1,065,525	$	465,154	$	522,271	$	289,174		$	80,380		$	—		$	12,540,696

	Commercial		Commercial collateralized  by assignment of lease payments		Commercial real estate			Residential real estate			Construction real estate		Indirect vehicle		Home equity			Other consumer		Unfunded commitments			Total
September 30, 2015
Allowance for credit losses:
Three Months Ended
Beginning balance	$	39,142	$	11,268	$	38,076		$	6,669		$	12,459	$	1,909	$	8,412		$	2,135	$	4,060		$	124,130
Charge-offs	1,657		1,980		170			292			5		581		358			467		—			5,510
Recoveries	456		11		2,402			337			216		334		186			118		—			4,060
Provision	5,044		985		1,216			(868		)	123		512		(1,490		)	484		(648		)	5,358
Ending balance	$	42,985	$	10,284	$	41,524		$	5,846		$	12,793	$	2,174	$	6,750		$	2,270	$	3,412		$	128,038
Nine Months Ended
Beginning balance	$	29,571	$	9,962	$	41,826		$	6,646		$	8,918	$	1,687	$	9,456		$	1,960	$	4,031		$	114,057
Charge-offs	2,283		2,080		2,312			1,189			11		2,082		1,078			1,391		—			12,426
Recoveries	1,514		1,100		6,338			417			253		1,354		447			356		—			11,779
Provision	14,183		1,302		(4,328		)	(28		)	3,633		1,215		(2,075		)	1,345		(619		)	14,628
Ending balance	$	42,985	$	10,284	$	41,524		$	5,846		$	12,793	$	2,174	$	6,750		$	2,270	$	3,412		$	128,038
Ending allowance balance attributable to loans:
Individually evaluated for impairment	$	7,943	$	2,618	$	3,123		$	2,834		$	—	$	8	$	2,478		$	—	$	1,388		$	20,392
Collectively evaluated for impairment	34,731		7,666		36,975			3,012			12,700		2,166		4,272			2,270		2,024			105,816
Acquired and accounted for under ASC 310-30 (1)	311		—		1,426			—			93		—		—			—		—			1,830
Total ending allowance balance	$	42,985	$	10,284	$	41,524		$	5,846		$	12,793	$	2,174	$	6,750		$	2,270	$	3,412		$	128,038
Loans:
Individually evaluated for impairment	$	36,325	$	6,724	$	29,354		$	14,233		$	—	$	131	$	29,520		$	—	$	—		$	116,287
Collectively evaluated for impairment	3,404,307		1,686,816		2,550,655			592,938			255,620		345,600		193,653			87,612		—			9,117,201
Acquired and accounted for under ASC 310-30 (1)	37,189		—		47,803			43,735			12,372		—		11,986			2,608		—			155,693
Total ending loans balance	$	3,477,821	$	1,693,540	$	2,627,812		$	650,906		$	267,992	$	345,731	$	235,159		$	90,220	$	—		$	9,389,181

⁽¹⁾  Loans acquired in business combinations and accounted for under ASC Subtopic 310-30 “Receivables — Loans and Debt Securities Acquired with Deteriorated Credit Quality.”

Changes in the Accretable Yield for Purchased Credit-Impaired Loans

Changes in the accretable yield for loans acquired and accounted for under ASC 310-30 were as follows for the three and nine months endedSeptember 30, 2016 and 2015 (in thousands):

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2016			2015			2016			2015
Balance at beginning of period	$	13,160		$	11,456		$	12,596		$	7,434
Purchases	805			—			805			—
Accretion	(2,564		)	(1,794		)	(7,193		)	(5,541		)
Other (1)	2,523			590			7,716			8,359
Balance at end of period	$	13,924		$	10,252		$	13,924		$	10,252

⁽¹⁾  Primarily includes discount transfers from non-accretable discount to accretable discount due to better than expected performance of loan pools acquired and accounted for under ASC 310-30.

Carrying Amount of Loans Acquired Through a Business Combination by Loan Pool Type

The carrying amount of loans acquired through a business combination by loan pool type are as follows (in thousands):

September 30, 2016	Purchased Credit-Impaired Loans		Purchased Non-Credit-Impaired Loans		Total
Covered loans:
Consumer related	$	18,619	$	—	$	18,619
Non-covered loans:
Commercial loans	22,913		972,065		994,978
Commercial loans collateralized by assignment of lease payments	—		72,193		72,193
Commercial real estate	41,286		1,412,677		1,453,963
Construction real estate	14,131		38,568		52,699
Consumer related	64,389		403,608		467,997
Total non-covered loans	142,719		2,899,111		3,041,830
Total acquired	$	161,338	$	2,899,111	$	3,060,449

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Goodwill and Intangibles (Tables)

9 Months Ended

Sep. 30, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Carrying Amount of Goodwill

The following table presents the changes in the carrying amount of goodwill for the nine months endedSeptember 30, 2016 (in thousands):

	Banking		Leasing		Mortgage Banking		Total
Balance at beginning of period	$	684,430	$	40,640	$	—	$	725,070
Goodwill from business combinations (1)	268,729		—		—		268,729
Balance at end of period	$	953,159	$	40,640	$	—	$	993,799

⁽¹⁾  Due to the American Chartered merger and adjustments recognized for the MSA acquisition.

Changes in the Carrying Amount of Core Deposit and Client Relationship Intangibles

The following table presents the changes during the nine months endedSeptember 30, 2016 in the carrying amount of core deposit and client relationship intangibles, and the gross carrying amount, accumulated amortization, and net book value as of September 30, 2016 (in thousands):

	September 30, 2016
Balance at beginning of period	$	44,812
Amortization expense	(4,917		)
Other intangibles from acquisition	25,500
Balance at end of period	$	65,395
Gross carrying amount	$	118,792
Accumulated amortization	(53,397		)
Net book value	$	65,395

Estimated Future Amortization Expense of Other Intangible Assets

The following presents the estimated future amortization expense of other intangible assets (in thousands):

Year ending December 31,	Amount
2016	$	2,390
2017	8,198
2018	7,456
2019	5,677
2020	5,026
Thereafter	36,648
	$	65,395

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Deposits (Tables)

9 Months Ended

Sep. 30, 2016

Banking and Thrift [Abstract]

Schedule of Composition of Deposits

The composition of deposits was as follows as of September 30, 2016 and December 31, 2015 (in thousands):

	September 30,		December 31,
	2016		2015
Demand deposit accounts, non-interest bearing	$	6,410,334	$	4,627,184
NOW, money market and interest bearing deposits	4,660,407		4,144,633
Savings accounts	1,147,900		974,555
Certificates of deposit, $250,000 or more	1,121,599		877,352
Other certificates of deposit	939,026		881,491
Total	$	14,279,266	$	11,505,215

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Short-Term Borrowings (Tables)

9 Months Ended

Sep. 30, 2016

Debt Disclosure [Abstract]

Summary of Short-Term Borrowings

Short-term borrowings were as follows as of September 30, 2016 and December 31, 2015 (dollars in thousands):

	September 30, 2016				December 31, 2015
	Weighted Average Interest Rate		Amount		Weighted Average Interest Rate		Amount
Customer repurchase agreements	0.21	%	$	256,569	0.20	%	$	201,207
Federal Home Loan Bank advances	0.38		1,200,000		0.17		775,000
Federal funds purchased	0.60		39,750		0.09		4,530
Line of credit	—		—		2.18		25,000
Total	0.36	%	$	1,496,319	0.23	%	$	1,005,737

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Junior Subordinated Notes Issued to Capital Trusts (Tables)

9 Months Ended

Sep. 30, 2016

Debt Disclosure [Abstract]

Outstanding Junior Subordinated Notes and the Related Trust Preferred Securities Issued by Each Trust

The table below summarizes the outstanding junior subordinated notes and the related trust preferred securities issued by each trust as of September 30, 2016 (in thousands):

	Coal City Capital Trust I		MB Financial Capital Trust II		MB Financial Capital Trust III		MB Financial Capital Trust IV
Junior Subordinated Notes:
Principal balance	$	25,774	$	36,083	$	10,310	$	20,619
Annual interest rate	3-mo LIBOR + 1.80%		3-mo LIBOR + 1.40%		3-mo LIBOR + 1.50%		3-mo LIBOR + 1.52%
Stated maturity date	September 1, 2028		September 15, 2035		September 23, 2036		September 15, 2036
Call date	September 1, 2008		December 15, 2010		September 23, 2011		September 15, 2011
Trust Preferred Securities:
Face Value	$	25,000	$	35,000	$	10,000	$	20,000
Annual distribution rate	3-mo LIBOR + 1.80%		3-mo LIBOR + 1.40%		3-mo LIBOR + 1.50%		3-mo LIBOR + 1.52%
Issuance date	July 1998		August 2005		July 2006		August 2006
Distribution dates (1)	Quarterly		Quarterly		Quarterly		Quarterly

	MB Financial Capital Trust V		MB Financial Capital Trust VI		FOBB Statutory Trust III (2)		TAYC Capital Trust II (3)
Junior Subordinated Notes:
Principal balance	$	30,928	$	23,196	$	5,155	$	41,238
Annual interest rate	3-mo LIBOR + 1.30%		3-mo LIBOR + 1.30%		3-mo LIBOR + 2.80%		3-mo LIBOR + 2.68%
Stated maturity date	December 15, 2037		October 30, 2037		January 23, 2034		June 17, 2034
Call date	December 15, 2012		October 30, 2012		January 23, 2009		June 17, 2009
Trust Preferred Securities:
Face Value	$	30,000	$	22,500	$	5,000	$	40,000
Annual distribution rate	3-mo LIBOR + 1.30%		3-mo LIBOR + 1.30%		3-mo LIBOR + 2.80%		3-mo LIBOR + 2.68%
Issuance date	September 2007		October 2007		December 2003		June 2004
Distribution dates (1)	Quarterly		Quarterly		Quarterly		Quarterly

	American Chartered Statutory Trust I (4)		American Chartered Statutory Trust II (4)
Junior Subordinated Notes:
Principal balance	$	20,619	$	10,464
Annual interest rate	3-mo LIBOR + 3.60%		3-mo LIBOR + 2.75%
Stated maturity date	December 18, 2031		October 7, 2034
Call date	December 18, 2006		October 7, 2009
Trust Preferred Securities:
Face Value	$	20,000	$	10,000
Annual distribution rate	3-mo LIBOR + 3.60%		3-mo LIBOR + 2.75%
Issuance date	November 2001		August 2004
Distribution dates (1)	Quarterly		Quarterly

⁽¹⁾  All distributions are cumulative and paid in cash.

⁽²⁾  FOBB Statutory Trust III was established by First Oak Brook Bancshares, Inc. (“FOBB”) prior to the Company's acquisition of FOBB in 2006, and the junior subordinated notes issued by FOBB to FOBB Statutory Trust III were assumed by the Company upon completion of the acquisition.

⁽³⁾  TAYC Capital Trust II was established by Taylor Capital Group, Inc. (“Taylor Capital”) prior to the Company's acquisition of Taylor Capital in 2014, and the junior subordinated notes issued by Taylor Capital to TAYC Capital Trust II were assumed by the Company upon completion of the acquisition. Principal balance and face value amounts associated with TAYC Capital Trust II do not include purchase accounting adjustments to such amounts, which in each case resulted in a discount of $6.8 million.

⁽⁴⁾  American Chartered Statutory Trust I and American Chartered Statutory Trust II were established by American Chartered prior to the Company's acquisition of American Chartered in August 2016, and the junior subordinated notes issued by American Chartered to American Chartered Statutory Trust I and American Chartered Statutory Trust II were assumed by the Company upon completion of the acquisition. Principal balance and face value amounts associated with American Chartered Statutory Trust I and American Chartered Statutory Trust II do not include purchase accounting adjustments to such amounts, which in each case resulted in a discount of $8.0 million.

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Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2016

Commitments and Contingencies Disclosure [Abstract]

Schedule of Outstanding Financial Instruments, Contractual Amounts of Off-Balance Sheet Credit Risk

At September 30, 2016 and December 31, 2015, the following financial instruments were outstanding, the contractual amounts of which represent off-balance sheet credit risk (in thousands):

	Contractual Amount
	September 30, 2016		December 31, 2015
Commitments to extend credit:
Home equity lines	$	243,331	$	187,478
Other commitments	3,596,246		3,049,152
Letters of credit:
Standby	172,737		137,945
Commercial	5,211		1,108

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2016

Fair Value Disclosures [Abstract]

Financial Assets and Financial Liabilities Measured at Fair Value on a Recurring Basis

The following table summarizes financial assets and financial liabilities measured at fair value on a recurring basis as of September 30, 2016 and December 31, 2015, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value (in thousands):

	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
September 30, 2016
Financial assets
Securities available for sale:
U.S Government sponsored agencies and enterprises	$	53,968	$	—	$	53,968	$	—
States and political subdivisions	410,737		—		410,320		417
Residential mortgage-backed securities	1,076,337		—		1,076,132		205
Commercial mortgage-backed securities	96,993		—		96,993		—
Corporate bonds	210,193		—		210,193		—
Equity securities	11,128		11,128		—		—
Loans held for sale	899,412		—		899,412		—
Loans	19,121		—		19,121		—
Mortgage servicing rights	154,730		—		—		154,730
Assets held in trust for deferred compensation	18,937		18,937		—		—
Derivative financial instruments	112,208		1,347		98,300		12,561
Financial liabilities
Other liabilities (1)	18,937		18,937		—		—
Derivative financial instruments	70,330		6,001		64,329		—
December 31, 2015
Financial assets
Securities available for sale:
U.S. Government sponsored agencies and enterprises	$	64,611	$	—	$	64,611	$	—
States and political subdivisions	396,367		—		395,950		417
Residential mortgage-backed securities	763,549		—		763,193		356
Commercial mortgage-backed securities	130,107		—		130,107		—
Corporate bonds	219,628		—		219,628		—
Equity securities	10,761		10,761		—		—
Loans held for sale	744,727		—		744,727		—
Loans	25,869		—		25,869		—
Mortgage servicing rights	168,162		—		—		168,162
Assets held in trust for deferred compensation	16,820		16,820		—		—
Derivative financial instruments	42,846		5,118		33,906		3,822
Financial liabilities
Other liabilities (1)	16,333		16,333		—		—
Derivative financial instruments	36,974		6,050		30,924		—

⁽¹⁾  Liabilities associated with assets held in trust for deferred compensation

Summary of Financial Assets Measured at Fair Value on a Recurring Basis, Unobservable Inputs Used

The following table presents additional information about the unobservable inputs used in the fair value measurement of financial assets measured on a nonrecurring basis that were categorized within the Level 3 of the fair value hierarchy:

	Fair Value at		Valuation	Unobservable
	September 30, 2016		Technique	Input	Range
	(in thousands)
Impaired loans	$	54,740	Appraisal of collateral	Appraisal adjustments	5% - 10%
Foreclosed assets	38,735		Appraisal of collateral	Appraisal adjustments	5% - 10%

The following table presents additional information about the unobservable inputs used in the fair value measurement of financial assets measured on a recurring basis that were categorized within the Level 3 of the fair value hierarchy:

	Fair Value at
	September 30, 2016		Valuation Technique	Unobservable Input	Range
	(in thousands)
States and political subdivisions	$	417	Discounted cash flows	Credit assumption	50% Loss
Residential mortgage-backed securities	205		Discounted cash flows	Constant pre-payment rates (CPR)	1% - 3%
Mortgage servicing rights	154,730		Discounted cash flows	CPR	12.3% - 16.1%
				Discount rate	9.50 - 12.00
				Maturity (months)	327 - 357
				Delinquencies	0.51 - 3.86
				Costs to service	$ 66 - $ 160
				Costs to service - delinquent	$ 150 - $ 1,000
Derivative financial instruments (mortgage	12,561		Sales cash flows	Expected closing ratio	70% - 95%
interest rate lock commitments)				Expected delivery price	98.58 bps - 109.77 bps

Schedule of Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets

Key economic assumptions used in the measuring of the fair value of the mortgage servicing rights and the sensitivity of the fair value to immediate adverse changes in those assumptions at September 30, 2016 are presented in the following table. This table does not take into account the derivatives used to economically hedge the mortgage servicing rights.

(dollars in thousands, except for weighted average cost to service)	September 30, 2016
Weighted average CPR	15.30		%
Impact on fair value of 10% adverse change	$	(7,917	)
Impact on fair value of 20% adverse change	(15,144		)
Weighted average discount rate	9.78		%
Impact on fair value of 10% adverse change	$	(5,045	)
Impact on fair value of 20% adverse change	(9,769		)
Weighted average delinquency rate	1.80		%
Impact on fair value of 10% adverse change	$	(1,329	)
Impact on fair value of 20% adverse change	(2,428		)
Weighted average costs to service	$	88
Impact on fair value of 10% adverse change	(2,988		)
Impact on fair value of 20% adverse change	(5,976		)

Financial Assets Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Level 3)

The following table presents additional information about financial assets measured at fair value on a recurring basis for which the Company used significant unobservable inputs (Level 3):

	Nine Months Ended
	September 30,
	2016			2015			2016			2015			2016		2015
(in thousands)	Investment Securities						Mortgage Servicing Rights						Derivatives
Balance, beginning of period	$	773		$	973		$	168,162		$	235,402		$	3,822	$	5,074
Purchases	—			—			3,423			785			—		—
Originations	—			—			43,039			55,583			—		—
Included in earnings	—			—			(59,894		)	(40,568		)	8,739		3,088
Principal payments	(151		)	(115		)	—			—			—		—
Sales	—			—			—			(103,105		)	—		—
Balance, ending of period	$	622		$	858		$	154,730		$	148,097		$	12,561	$	8,162

Assets Measured at Fair Value on a Nonrecurring Basis

Assets measured at fair value on a nonrecurring basis as of September 30, 2016 and December 31, 2015 are included in the table below (in thousands):

	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
September 30, 2016
Financial assets:
Impaired loans	$	54,740	$	—	$	—	$	54,740
Non-financial assets:
Foreclosed assets	38,735		—		—		38,735
December 31, 2015
Financial assets:
Impaired loans	$	76,203	$	—	$	—	$	76,203
Non-financial assets:
Foreclosed assets	42,351		—		—		42,351

Estimated Fair Values of Financial Instruments

The estimated fair values of financial instruments are as follows (in thousands):

	September 30, 2016
	Carrying Amount		Estimated Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Financial Assets:
Cash and due from banks	$	351,009	$	351,009	$	351,009	$	—	$	—
Interest earning deposits with banks	125,250		125,250		125,250		—		—
Investment securities available for sale	1,859,356		1,859,356		11,128		1,847,606		622
Investment securities held to maturity	1,115,262		1,175,838		—		1,175,838		—
Non-marketable securities - FHLB and FRB stock	146,209		146,209		—		—		146,209
Loans held for sale	899,412		899,412		—		899,412		—
Loans, net	12,401,168		12,403,330		—		19,121		12,384,209
Accrued interest receivable	58,541		58,541		58,541		—		—
Derivative financial instruments	112,208		112,208		1,347		98,300		12,561
Financial Liabilities:
Non-interest bearing deposits	$	6,410,334	$	6,410,334	$	6,410,334	$	—	$	—
Interest bearing deposits	7,868,932		7,873,233		—		—		7,873,233
Short-term borrowings	1,496,319		1,496,312		—		—		1,496,312
Long-term borrowings	311,645		312,974		—		—		312,974
Junior subordinated notes issued to capital trusts	209,159		144,681		—		—		144,681
Accrued interest payable	4,000		4,000		4,000		—		—
Derivative financial instruments	70,330		70,330		6,001		64,329		—

	December 31, 2015
	Carrying Amount		Estimated Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Financial Assets:
Cash and due from banks	$	307,869	$	307,869	$	307,869	$	—	$	—
Interest earning deposits with banks	73,572		73,572		73,572		—		—
Investment securities available for sale	1,585,023		1,585,023		10,761		1,573,489		773
Investment securities held to maturity	1,230,810		1,274,767		—		1,274,767		—
Non-marketable securities - FHLB and FRB stock	114,233		114,233		—		—		114,233
Loans held for sale	744,727		744,727		—		744,727		—
Loans, net	9,665,858		9,626,344		—		25,869		9,600,475
Accrued interest receivable	53,457		53,457		53,457		—		—
Derivative financial instruments	42,846		42,846		5,118		33,906		3,822
Financial Liabilities:
Non-interest bearing deposits	$	4,627,184	$	4,627,184	$	4,627,184	$	—	$	—
Interest bearing deposits	6,878,031		6,875,411		—		—		6,875,411
Short-term borrowings	1,005,737		1,005,705		—		—		1,005,705
Long-term borrowings	400,274		401,539		—		—		401,539
Junior subordinated notes issued to capital trusts	186,164		122,696		—		—		122,696
Accrued interest payable	3,186		3,186		3,186		—		—
Derivative financial instruments	36,974		36,974		6,050		30,924		—

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Stock Incentive Plans (Tables)

9 Months Ended

Sep. 30, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-Based Payment Plans

The following table summarizes the impact of the Company’s share-based payment plans in the financial statements for the periods shown (in thousands):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2016		2015		2016		2015
Total cost of share-based payment plans during the period	$	4,238	$	3,508	$	12,573	$	10,983
Amount of related income tax benefit recognized in income	3,394		1,367		6,649		$	4,288

Summary of Changes in Stock Options

The following table summarizes changes in stock options for the nine months endedSeptember 30, 2016:

	Number of Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (In Years)	Aggregate Intrinsic Value (in thousands)
Options outstanding as of December 31, 2015	2,192,431		$	27.77	4.44
Granted	501,538		28.86
Exercised	(461,405	)	28.98
Expired	(35,791	)	39.91
Forfeited or cancelled	(33,680	)	31.06
Options outstanding as of September 30, 2016	2,163,093		$	27.51	5.26	$	22,903
Options exercisable as of September 30, 2016	1,423,442		$	26.82	3.53	$	16,109

Assumptions Used for Options Granted

 The following assumptions were used for options granted during the nine months endedSeptember 30, 2016:

	September 30, 2016
Risk-free interest rate	1.44		%
Expected volatility of Company’s stock	28.17		%
Expected dividend yield	2.21		%
Expected life of options	5.6 years
Weighted average fair value per option of options granted during the year	$	6.64

Summary of Changes in Restricted Shares and Units

The following is a summary of changes in restricted shares and units for the nine months endedSeptember 30, 2016:

	Number of Shares and Units		Weighted Average Grant Date Fair Value
Shares and units outstanding at December 31, 2015	945,506		$	29.92
Granted	482,739		31.19
Vested	(405,633	)	28.37
Forfeited or cancelled	(23,824	)	29.95
Shares and units outstanding at September 30, 2016	998,788		31.17

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Derivative Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2016

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Summary of Derivative Financial Instruments

The Company’s derivative financial instruments are summarized below as of September 30, 2016 and December 31, 2015 (in thousands):

	Asset Derivatives								Liability Derivatives
	September 30, 2016				December 31, 2015				September 30, 2016					December 31, 2015
	Notional		Estimated		Notional		Estimated		Notional		Estimated			Notional		Estimated
	Amount		Fair Value		Amount		Fair Value		Amount		Fair Value			Amount		Fair Value
Derivative instruments designated as hedges of fair value:
Interest rate swap contracts (1)	$	—	$	—	$	—	$	—	$	119	$	(5	)	$	154	$	(9	)
Stand-alone derivative instruments: (2)
Interest rate swap contracts	1,226,157		49,520		1,034,298		27,856		1,226,157		(49,520		)	1,025,186		(27,899		)
Interest rate options contracts	219,409		872		222,585		628		219,409		(872		)	190,622		(585		)
Foreign exchange contracts	49,550		3,231		72,529		3,970		44,474		(3,011		)	63,339		(3,671		)
Spot foreign exchange contracts	742		17		328		5		278		(6		)	132		—
Mortgage related derivatives:
Interest rate swap contracts	1,332,000		44,660		898,000		4,928		185,000		(10,915		)	665,000		(3,723		)
Interest rate swaptions contracts	—		—		—		—		—		—			—		—
Treasury futures contracts	86,500		406		—		—		—		—			—		—
TBA mortgage securities	290,000		856		35,000		33		—		—			—		—
Forward loan sale commitments	85,000		85		503,500		1,604		1,261,500		(6,001		)	475,500		(1,087		)
Interest rate lock commitments	944,918		12,561		622,906		3,822		—		—			—		—
Total stand-alone derivative instruments	4,234,276		112,208		3,389,146		42,846		2,936,818		(70,325		)	2,419,779		(36,965		)
Total	$	4,234,276	$	112,208	$	3,389,146	$	42,846	$	2,936,937	$	(70,330	)	$	2,419,933	$	(36,974	)

⁽¹⁾ Derivative instruments designated to hedge fixed-rate commercial real estate loans.

⁽²⁾ These portfolio swaps are not designated as hedging instruments under ASC Topic 815.

Schedule of the Amounts Included in Consolidated Statements of Operations Related to Derivative Financial Instruments

Amounts included in other operating income in the consolidated statements of operations related to derivative financial instruments were as follows (in thousands):

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2016			2015			2016		2015
Derivative instruments designated as hedges of fair value:
Interest rate swap contracts	$	3		$	4		$	3	$	4
Stand-alone derivative instruments:
Interest rate swap contracts	5,296			8,614			5,260		8,623
Interest rate options contracts	(36		)	—			—		—
Foreign exchange contracts	1,362			30			1,362		91
Spot foreign exchange contracts	6			14			6		182
Mortgage related derivatives	(8,118		)	(9,411		)	31,653		(9,408		)
Total stand-alone derivative instruments	(1,490		)	(753		)	38,281		(512		)
Total	$	(1,487	)	$	(749	)	$	38,284	$	(508	)

Schedule of Financial Instruments Eligible for Offset In the Consolidated Balance Sheet

Information about the Company's financial instruments that are eligible for offset in the consolidated balance sheet as of September 30, 2016 is summarized below (in thousands):

	Financial Assets						Financial Liabilities
	Gross Amount Recognized		Gross Amount Offset		Net Amount Recognized		Gross Amount Recognized		Gross Amount Offset		Net Amount Recognized
Derivatives:
Interest rate swap contracts, caps and floors	$	652	$	—	$	652	$	50,047	$	—	$	50,047
Foreign exchange contracts	2,850		—		2,850		1,551		—		1,551
Mortgage related derivatives	46,008		—		46,008		16,917		—		16,917
Total derivatives	49,510		—		49,510		68,515		—		68,515
Repurchase agreements	—		—		—		256,569		—		256,569
Total	$	49,510	$	—	$	49,510	$	325,084	$	—	$	325,084

	Financial Assets									Financial Liabilities
	Net Amount Recognized		Financial Instruments			Collateral		Net Amount		Net Amount Recognized		Financial Instruments			Collateral			Net Amount
Derivatives:
Counterparty A	$	35,142	$	(15,868	)	$	—	$	19,274	$	15,868	$	(15,868	)	$	—		$	—
Counterparty B	309		(309		)	—		—		11,098		(309		)	(10,789		)	—
Counterparty C	7,740		(7,740		)	—		—		17,344		(7,740		)	(9,604		)	—
Other counterparties	6,319		(6,296		)	—		23		24,205		(6,296		)	(17,886		)	23
Total derivatives	49,510		(30,213		)	—		19,297		68,515		(30,213		)	(38,279		)	23
Repurchase agreements	—		—			—		—		256,569		—			(256,569		)	—
Total	$	49,510	$	(30,213	)	$	—	$	19,297	$	325,084	$	(30,213	)	$	(294,848	)	$	23

Information about the Company's financial instruments that are eligible for offset in the consolidated balance sheet as of December 31, 2015 is summarized below (in thousands):

	Financial Assets						Financial Liabilities
	Gross Amount Recognized		Gross Amount Offset		Net Amount Recognized		Gross Amount Recognized		Gross Amount Offset		Net Amount Recognized
Derivatives:
Interest rate swap contracts, caps and floors	$	5,698	$	—	$	5,698	$	31,446	$	—	$	31,446
Foreign exchange contracts	2,728		—		2,728		1,805		—		1,805
Mortgage related derivatives	1,636		—		1,636		1,087		—		1,087
Total derivatives	10,062		—		10,062		34,338		—		34,338
Repurchase agreements	—		—		—		201,207		—		201,207
Total	$	10,062	$	—	$	10,062	$	235,545	$	—	$	235,545

	Financial Assets									Financial Liabilities
	Net Amount Recognized		Financial Instruments			Collateral		Net Amount		Net Amount Recognized		Financial Instruments			Collateral			Net Amount
Derivatives:
Counterparty A	$	3,810	$	(3,810	)	$	—	$	—	$	11,137	$	(3,810	)	$	(7,327	)	$	—
Counterparty B	6		(6		)	—		—		7,808		(6		)	(7,802		)	—
Counterparty C	3,477		(3,477		)	—		—		4,963		(3,477		)	(1,486		)	—
Other counterparties	2,769		(2,230		)	—		539		10,430		(2,230		)	(8,034		)	166
Total derivatives	10,062		(9,523		)	—		539		34,338		(9,523		)	(24,649		)	166
Repurchase agreements	—		—			—		—		201,207		—			(201,207		)	—
Total	$	10,062	$	(9,523	)	$	—	$	539	$	235,545	$	(9,523	)	$	(225,856	)	$	166

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Operating Segments (Tables)

9 Months Ended

Sep. 30, 2016

Segment Reporting [Abstract]

Summary Financial Information for the Reportable Segments

The following tables present summary financial information for the reportable segments (in thousands):

	Banking		Leasing		Mortgage Banking		Consolidated
Three months ended September 30, 2016
Net interest income	$	119,685	$	2,168	$	8,918	$	130,771
Provision for credit losses	4,394		1,964		191		6,549
Non-interest income	40,533		18,759		49,095		108,387
Non-interest expense (1)	117,211		12,604		40,570		170,385
Income tax expense	8,420		2,484		6,901		17,805
Net income	$	30,193	$	3,875	$	10,351	$	44,419
Total assets	$	16,453,379	$	1,126,847	$	1,761,656	$	19,341,882
Three months ended September 30, 2015
Net interest income	$	104,714	$	2,832	$	8,423	$	115,969
Provision for credit losses	4,965		242		151		5,358
Non-interest income	31,572		19,987		30,692		82,251
Non-interest expense (1)	88,276		11,382		34,608		134,266
Income tax expense	12,178		4,398		1,742		18,318
Net income	$	30,867	$	6,797	$	2,614	$	40,278
Total assets	$	12,759,341	$	956,433	$	1,234,327	$	14,950,101

⁽¹⁾  Includes merger related and repositioning expenses of $11.4 million and $389 thousand in the Banking Segment for the three months ended September 30, 2016 and 2015, respectively.

	Banking		Leasing		Mortgage Banking		Consolidated
Nine months ended September 30, 2016
Net interest income	$	341,445	$	7,002	$	24,230	$	372,677
Provision for credit losses	14,390		2,045		506		16,941
Non-interest income	112,221		53,670		116,189		282,080
Non-interest expense (1)	307,733		35,916		110,442		454,091
Income tax expense	36,120		8,872		11,788		56,780
Net income	$	95,423	$	13,839	$	17,683	$	126,945
Total assets	$	16,453,379	$	1,126,847	$	1,761,656	$	19,341,882
Nine months ended September 30, 2015
Net interest income	$	313,192	$	8,762	$	21,883	$	343,837
Provision for credit losses	12,783		1,598		247		14,628
Non-interest income	94,197		61,383		90,888		246,468
Non-interest expense (1)	271,248		34,866		100,809		406,923
Income tax expense	35,509		13,218		4,686		53,413
Net income	$	87,849	$	20,463	$	7,029	$	115,341
Total assets	$	12,759,341	$	956,433	$	1,234,327	$	14,950,101

⁽¹⁾  Includes merger related and repositioning expenses of $17.2 million and $9.6 million in the Banking Segment for the nine months endedSeptember 30, 2016 and 2015, respectively.

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New Authoritative Accounting Guidance (Details) $ in Millions	3 Months Ended
	Sep. 30, 2016 USD ($)
Accounting Standards Update 2016-09 | New Accounting Pronouncement, Early Adoption, Effect
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Tax benefit	$ 1.8

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Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income	$ 44,419	$ 40,278	$ 126,945	$ 115,341
Less: preferred stock dividends	2,004	2,000	6,004	6,000
Net income available to common stockholders	42,415	38,278	120,941	109,341
Plus: preferred stock dividends on convertible preferred stock	4	0	4	0
Earnings allocated to common stockholders for diluted earnings per common share	$ 42,417	$ 38,276	$ 120,939	$ 109,336
Weighted average shares outstanding for basic earnings per common share (in shares)	77,506,885	74,297,281	74,780,943	74,478,164
Weighted average shares outstanding for diluted earnings per common share (in shares)	78,683,170	75,029,827	75,727,580	75,154,585
Basic earnings per common share (in dollars per share)	$ 0.55	$ 0.52	$ 1.62	$ 1.47
Diluted earnings per common share (in dollars per share)	$ 0.54	$ 0.51	$ 1.60	$ 1.45
Common Stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Distributed earnings allocated to common stock	$ 16,114	$ 12,733	$ 42,984	$ 36,227
Undistributed earnings	28,305	27,545	83,961	79,114
Net income	44,419	40,278	126,945	115,341
Net income available to common stockholders	$ 42,415	$ 38,278	$ 120,941	$ 109,341
Weighted average shares outstanding for basic earnings per common share (in shares)	77,506,885	74,297,281	74,780,943	74,478,164
Dilutive effect of equity awards (in shares)	1,176,285	732,546	946,637	676,421
Weighted average shares outstanding for diluted earnings per common share (in shares)	78,683,170	75,029,827	75,727,580	75,154,585
Participating Securities
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Less: earnings allocated to participating securities	$ 2	$ 2	$ 6	$ 5

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Business Combinations (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Goodwill	$ 993,799	$ 725,070
MSA Holdings, LLC
Business Acquisition [Line Items]
Percent of business acquired		100.00%
Goodwill		$ 13,500
Other intangibles		$ 8,800

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Business Combinations (Details 1) - USD ($)				9 Months Ended
		Aug. 24, 2016	Nov. 20, 2015	Sep. 30, 2016	Sep. 30, 2015
Business Acquisition [Line Items]
Accretable discount on loans				$ 25,426,000	$ 26,365,000
American Chartered Bancorp, Inc.
Business Acquisition [Line Items]
Total identifiable net assets		$ 487,416,000
Cash paid		102,317,000
Preferred stock and stock-based awards assumed		2,300,000
Acquisition costs incurred		1,800,000
American Chartered Bancorp, Inc. | Purchased Credit-Impaired Loans
Business Acquisition [Line Items]
Best estimate of contractual cash flows not expected to be collected		4,300,000
Accretable discount		805,000
American Chartered Bancorp, Inc. | Substandard
Business Acquisition [Line Items]
Accretable discount on loans		$ 29,000,000
American Chartered Bancorp, Inc. | Common Stock
Business Acquisition [Line Items]
Stock issued (in shares)	[1]	9,744,636
American Chartered Bancorp, Inc.
Business Acquisition [Line Items]
Amount called by each warrant or right (in dollars per share)			$ 9.30
Amount paid for each fractional share (in dollars per share)			$ 39.01
American Chartered Bancorp, Inc. | Common Stock
Business Acquisition [Line Items]
Number of securities called by each warrant (in shares)			0.2732
Series D Preferred Stock | American Chartered Bancorp, Inc.
Business Acquisition [Line Items]
Preferred stock, dividend rate (percent)		8.00%
Series B Preferred Stock
Business Acquisition [Line Items]
Preferred stock, dividend rate (percent)				8.00%
Series B Preferred Stock | American Chartered Bancorp, Inc.
Business Acquisition [Line Items]
Preferred stock, dividend rate (percent)		8.00%
Number of securities called by each warrant (in shares)		1

[1] Per share fair value amount determined as if the shares of Series B were converted into shares common stock.

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Business Combinations (Details 2) - USD ($) $ / shares in Units, $ in Thousands		Aug. 24, 2016	Sep. 30, 2016	Dec. 31, 2015
ASSETS
Goodwill			$ 993,799	$ 725,070
American Chartered Bancorp, Inc.
ASSETS
Cash and cash equivalents		$ 93,307
Investment securities available for sale		505,564
Non-marketable securities - FRB and FHLB Stock		16,000
Loans		1,952,826
Premises and equipment		39,061
Cash surrender value of life insurance		59,917
Goodwill		268,758
Other intangibles		25,500
Other real estate owned		4,148
Other assets		27,615
Total assets		2,992,696
LIABILITIES
Deposits		2,389,423
Long-term borrowings		48,305
Junior subordinated notes issued to capital trusts		16,000
Accrued expenses and other liabilities		23,477
Total liabilities		2,505,280
Total identifiable net assets		487,416
Consideration:
Stock-based compensation attributed to pre-business combination service		1,103
Cash paid		102,317
Total fair value of consideration, excluding Series B preferred stock		487,416
American Chartered Bancorp, Inc. | Common Stock
Consideration:
Market value of common stock and Series B preferred stock		$ 382,769
Stock issued (in dollars per share)	[1]	$ 39.28
Stock issued (in shares)	[1]	9,744,636
American Chartered Bancorp, Inc. | Preferred Stock | Series B Preferred Stock
Consideration:
Market value of common stock and Series B preferred stock	[1]	$ 1,227
Stock issued (in dollars per share)	[1]	$ 2,337.97
Stock issued (in shares)	[1]	525
American Chartered Bancorp, Inc. | Junior Subordinated Notes
LIABILITIES
Junior subordinated notes issued to capital trusts		$ 28,075

[1] Per share fair value amount determined as if the shares of Series B were converted into shares common stock.

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Business Combinations (Details 3) - American Chartered Bancorp, Inc. $ in Thousands	Aug. 24, 2016 USD ($)
Purchased Credit-Impaired Loans
Business Acquisition [Line Items]
Fair value	$ 24,575
Gross contractual amounts receivable	31,408
Best estimate of contractual cash flows not expected to be collected	5,048	[1]
Best estimate of contractual cash flows expected to be collected	26,360
Purchased Non-Credit-Impaired Loans
Business Acquisition [Line Items]
Fair value	1,928,251
Gross contractual amounts receivable	2,207,765
Best estimate of contractual cash flows not expected to be collected	129,027	[1]
Best estimate of contractual cash flows expected to be collected	$ 2,078,738

[1] Includes interest payments not expected to be collected due to loan prepayments as well as principal and interest payments not expected to be collected due to customer default.

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Business Combinations (Details 4) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Business Combinations [Abstract]
Total revenues (net interest income plus non-interest income	$ 256,866	$ 228,099	$ 731,987	$ 678,735
Net income	$ 48,432	$ 50,581	$ 147,078	$ 141,751

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Investment Securities (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Available for Sale
Amortized Cost	$ 1,817,165	$ 1,558,956
Gross Unrealized Gains	44,940	33,910
Gross Unrealized Losses	(2,749)	(7,843)
Fair Value	1,859,356	1,585,023
Held to Maturity
Amortized Cost	1,115,262	1,230,810
Gross Unrealized Gains	60,609	44,595
Gross Unrealized Losses	(33)	(638)
Fair Value	1,175,838	1,274,767
Total Available for Sale and Held to Maturity Investment Securities
Amortized Cost	2,932,427	2,789,766
Gross Unrealized Gains	105,549	78,505
Gross Unrealized Losses	(2,782)	(8,481)
Fair Value	3,035,194	2,859,790
U.S. Government sponsored agencies and enterprises
Available for Sale
Amortized Cost	53,456	63,805
Gross Unrealized Gains	512	806
Gross Unrealized Losses	0	0
Fair Value	53,968	64,611
States and political subdivisions
Available for Sale
Amortized Cost	383,041	373,285
Gross Unrealized Gains	27,914	23,083
Gross Unrealized Losses	(218)	(1)
Fair Value	410,737	396,367
Held to Maturity
Amortized Cost	939,491	1,016,519
Gross Unrealized Gains	53,682	36,874
Gross Unrealized Losses	(33)	(638)
Fair Value	$ 993,140	1,052,755
Total Available for Sale and Held to Maturity Investment Securities
Percentage of securities consisting general obligation issues	97.00%
Percentage of securities insured	48.00%
States and political subdivisions | State of Illinois
Total Available for Sale and Held to Maturity Investment Securities
Percentage of investments issued by states and political subdivisions that were within the state of Illinois	21.00%
Residential mortgage-backed securities
Available for Sale
Amortized Cost	$ 1,066,834	759,816
Gross Unrealized Gains	10,948	7,363
Gross Unrealized Losses	(1,445)	(3,630)
Fair Value	1,076,337	763,549
Held to Maturity
Amortized Cost	175,771	214,291
Gross Unrealized Gains	6,927	7,721
Gross Unrealized Losses	0	0
Fair Value	182,698	222,012
Commercial mortgage-backed securities
Available for Sale
Amortized Cost	93,962	128,509
Gross Unrealized Gains	3,203	1,839
Gross Unrealized Losses	(172)	(241)
Fair Value	96,993	130,107
Corporate bonds
Available for Sale
Amortized Cost	208,940	222,784
Gross Unrealized Gains	2,167	815
Gross Unrealized Losses	(914)	(3,971)
Fair Value	210,193	219,628
Equity securities
Available for Sale
Amortized Cost	10,932	10,757
Gross Unrealized Gains	196	4
Gross Unrealized Losses	0	0
Fair Value	$ 11,128	$ 10,761

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Investment Securities (Details 2) $ in Thousands	Sep. 30, 2016 USD ($) Security_Position	Dec. 31, 2015 USD ($) Security_Position
Available for Sale
Less Than 12 Months, Fair Value	$ 404,743	$ 434,194
Less Than 12 Months, Unrealized Losses	(1,588)	(4,005)
12 Months or More, Fair Value	59,313	73,661
12 Months or More, Unrealized Losses	(1,161)	(3,838)
Total Fair Value	464,056	507,855
Total Unrealized Losses	(2,749)	(7,843)
Total
Less Than 12 Months, Fair Value	435,885	500,346
Less Than 12 Months, Unrealized Losses	(1,620)	(4,524)
12 Months or More, Fair Value	59,700	79,851
12 Months or More, Unrealized Losses	(1,162)	(3,957)
Total Fair Value	495,585	580,197
Total Unrealized Losses	$ (2,782)	$ (8,481)
Number of security positions in the investment portfolio in an unrealized loss position | Security_Position	271	193
States and political subdivisions
Available for Sale
Less Than 12 Months, Fair Value	$ 20,526	$ 219
Less Than 12 Months, Unrealized Losses	(218)	(1)
12 Months or More, Fair Value	0	0
12 Months or More, Unrealized Losses	0	0
Total Fair Value	20,526	219
Total Unrealized Losses	(218)	(1)
Held to Maturity
Less Than 12 Months, Fair Value	31,142	66,152
Less Than 12 Months, Unrealized Losses	(32)	(519)
12 Months or More, Fair Value	387	6,190
12 Months or More, Unrealized Losses	(1)	(119)
Total Fair Value	31,529	72,342
Total Unrealized Losses	(33)	(638)
Residential mortgage-backed securities
Available for Sale
Less Than 12 Months, Fair Value	374,312	357,877
Less Than 12 Months, Unrealized Losses	(1,214)	(2,835)
12 Months or More, Fair Value	27,699	43,566
12 Months or More, Unrealized Losses	(231)	(795)
Total Fair Value	402,011	401,443
Total Unrealized Losses	(1,445)	(3,630)
Commercial mortgage-backed securities
Available for Sale
Less Than 12 Months, Fair Value	71	2,324
Less Than 12 Months, Unrealized Losses	(1)	(5)
12 Months or More, Fair Value	11,664	11,809
12 Months or More, Unrealized Losses	(171)	(236)
Total Fair Value	11,735	14,133
Total Unrealized Losses	(172)	(241)
Corporate bonds
Available for Sale
Less Than 12 Months, Fair Value	9,834	73,774
Less Than 12 Months, Unrealized Losses	(155)	(1,164)
12 Months or More, Fair Value	19,950	18,286
12 Months or More, Unrealized Losses	(759)	(2,807)
Total Fair Value	29,784	92,060
Total Unrealized Losses	$ (914)	$ (3,971)

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Investment Securities (Details 3) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Amortized cost and fair value of investment securities by contractual maturity
Realized gains	$ 0	$ 371,000	$ 323,000	$ 1,454,000
Realized losses	0	0	(54,000)	(1,627,000)
Net gains (losses)	0	$ 371,000	269,000	$ (173,000)
Amortized Cost, Available for sale
Due in one year or less	81,215,000		81,215,000
Due after one year through five years	267,485,000		267,485,000
Due after five years through ten years	44,899,000		44,899,000
Due after ten years	251,838,000		251,838,000
Amortized Cost	1,817,165,000		1,817,165,000		$ 1,558,956,000
Fair Value, Available for sale
Due in one year or less	81,620,000		81,620,000
Due after one year through five years	273,115,000		273,115,000
Due after five years through ten years	46,964,000		46,964,000
Due after ten years	273,199,000		273,199,000
Fair Value	1,859,356,000		1,859,356,000		1,585,023,000
Amortized Cost, Held to maturity
Due in one year or less	87,409,000		87,409,000
Due after one year through five years	146,995,000		146,995,000
Due after five years through ten years	159,780,000		159,780,000
Due after ten years	545,307,000		545,307,000
Investment securities held to maturity	1,115,262,000		1,115,262,000		1,230,810,000
Fair value, Held to maturity
Due in one year or less	87,524,000		87,524,000
Due after one year through five years	151,557,000		151,557,000
Due after five years through ten years	171,871,000		171,871,000
Due after ten years	582,188,000		582,188,000
Fair Value	1,175,838,000		1,175,838,000		1,274,767,000
Total Available for Sale and Held to Maturity Investment Securities
Amortized Cost	2,932,427,000		2,932,427,000		2,789,766,000
Fair Value	3,035,194,000		3,035,194,000		2,859,790,000
Pledged financial instruments, not separately reported, securities	1,200,000,000		1,200,000,000		1,400,000,000
Pledged financial instruments, not separately reported, securities required to be pledged	839,300,000		839,300,000		878,200,000
Investment securities pledged as collateral for long-term Federal Home Loan Bank advances	0		0		108,800,000
Equity securities
Amortized Cost, Available for sale
Amortized Cost	10,932,000		10,932,000		10,757,000
Fair Value, Available for sale
Fair Value	11,128,000		11,128,000		10,761,000
Residential and commercial mortgage-backed securities
Amortized Cost, Available for sale
Amortized Cost	1,160,796,000		1,160,796,000
Fair Value, Available for sale
Fair Value	1,173,330,000		1,173,330,000
Residential mortgage-backed securities
Amortized Cost, Available for sale
Amortized Cost	1,066,834,000		1,066,834,000		759,816,000
Fair Value, Available for sale
Fair Value	1,076,337,000		1,076,337,000		763,549,000
Amortized Cost, Held to maturity
Investment securities held to maturity	175,771,000		175,771,000		214,291,000
Fair value, Held to maturity
Fair Value	$ 182,698,000		$ 182,698,000		$ 222,012,000

XML

Loans (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016 USD ($) Investment_Rating	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)
Loans
Total loans, excluding purchased credit impaired loans	$ 12,379,358	$ 9,652,592
Purchased credit-impaired loans	161,338	141,406
Total loans	$ 12,540,696	9,793,998	$ 9,389,181
Number of highest rating categories by rating services company | Investment_Rating	1
Number of highest rating categories to be achieved for classification as investment grade companies | Investment_Rating	4
Percentage of collateral pledge of first mortgage loans as per agreement (minimum)	133.00%
Percentage of collateral pledge of home equity loans as per agreement	250.00%
Loans pledged as collateral for long-term Federal Home Loan Bank advances	$ 4,900,000	3,200,000
Loans required to be pledged as collateral for long-term Federal Home Loan Bank advances	3,100,000	2,200,000
Commercial loans
Loans
Total loans, excluding purchased credit impaired loans	4,385,812	3,616,286
Total loans	4,408,725		3,477,821
Commercial loans collateralized by assignment of lease payments
Loans
Total loans, excluding purchased credit impaired loans	1,873,380	1,779,072
Total loans	1,873,380		1,693,540
Commercial real estate
Loans
Total loans, excluding purchased credit impaired loans	3,794,801	2,695,676
Total loans	3,836,087		2,627,812
Residential real estate
Loans
Total loans, excluding purchased credit impaired loans	998,827	628,169
Total loans	1,065,525		650,906
Construction real estate
Loans
Total loans, excluding purchased credit impaired loans	451,023	252,060
Total loans	465,154		267,992
Indirect vehicle
Loans
Total loans, excluding purchased credit impaired loans	522,271	384,095
Total loans	522,271		345,731
Home equity
Loans
Total loans, excluding purchased credit impaired loans	275,288	216,573
Other consumer loans
Loans
Total loans, excluding purchased credit impaired loans	77,956	$ 80,661
Total loans	$ 80,380		$ 90,220

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Loans (Details 2) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	$ 12,379,358	$ 9,652,592
Total loans	$ 12,540,696	9,793,998	$ 9,389,181
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Period past due of recorded investment in loans (in days)	90 days
Non-performing loan aging
Contractual aging of the recorded investment in loans
Current	$ 31,009	44,290
Past Due	22,900	60,371
Total loans	53,909	104,661
30-59 Days Past Due | Non-performing loan aging
Contractual aging of the recorded investment in loans
Past Due	373	9,827
60-89 Days Past Due | Non-performing loan aging
Contractual aging of the recorded investment in loans
Past Due	1,801	9,367
Loans Past Due 90 Days or More | Non-performing loan aging
Contractual aging of the recorded investment in loans
Past Due	20,726	41,177
Commercial
Contractual aging of the recorded investment in loans
Current	4,376,819	3,586,372
Past Due	8,993	29,914
Total loans, excluding covered loans	4,385,812	3,616,286
Total loans	4,408,725		3,477,821
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Non-accrual	8,583	24,689
Loans past due 90 days or more and still accruing	1,166	42
Commercial | 30-59 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	2,649	22,956
Commercial | 60-89 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	104	97
Commercial | Loans Past Due 90 Days or More
Contractual aging of the recorded investment in loans
Past Due	6,240	6,861
Commercial loans collateralized by assignment of lease payments
Contractual aging of the recorded investment in loans
Current	1,855,322	1,758,839
Past Due	18,058	20,233
Total loans, excluding covered loans	1,873,380	1,779,072
Total loans	1,873,380		1,693,540
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Non-accrual	4,996	7,027
Loans past due 90 days or more and still accruing	153	5,318
Commercial loans collateralized by assignment of lease payments | 30-59 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	12,141	3,399
Commercial loans collateralized by assignment of lease payments | 60-89 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	4,672	5,902
Commercial loans collateralized by assignment of lease payments | Loans Past Due 90 Days or More
Contractual aging of the recorded investment in loans
Past Due	1,245	10,932
Healthcare
Contractual aging of the recorded investment in loans
Current	572,228	476,939
Past Due	0	0
Total loans, excluding covered loans	572,228	476,939
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Non-accrual	0	0
Loans past due 90 days or more and still accruing	0	0
Healthcare | 30-59 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	0	0
Healthcare | 60-89 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	0	0
Healthcare | Loans Past Due 90 Days or More
Contractual aging of the recorded investment in loans
Past Due	0	0
Industrial
Contractual aging of the recorded investment in loans
Current	854,045	400,182
Past Due	1,587	757
Total loans, excluding covered loans	855,632	400,939
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Non-accrual	278	1,136
Loans past due 90 days or more and still accruing	0	0
Industrial | 30-59 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	298	0
Industrial | 60-89 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	1,289	0
Industrial | Loans Past Due 90 Days or More
Contractual aging of the recorded investment in loans
Past Due	0	757
Multifamily
Contractual aging of the recorded investment in loans
Current	549,486	399,333
Past Due	620	1,644
Total loans, excluding covered loans	550,106	400,977
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Non-accrual	2,648	3,415
Loans past due 90 days or more and still accruing	0	0
Multifamily | 30-59 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	141	622
Multifamily | 60-89 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	366	88
Multifamily | Loans Past Due 90 Days or More
Contractual aging of the recorded investment in loans
Past Due	113	934
Retail
Contractual aging of the recorded investment in loans
Current	522,696	410,958
Past Due	1,021	13,780
Total loans, excluding covered loans	523,717	424,738
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Non-accrual	607	17,594
Loans past due 90 days or more and still accruing	0	0
Retail | 30-59 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	333	6,189
Retail | 60-89 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	235	7,411
Retail | Loans Past Due 90 Days or More
Contractual aging of the recorded investment in loans
Past Due	453	180
Office
Contractual aging of the recorded investment in loans
Current	416,965	223,935
Past Due	1,385	5,247
Total loans, excluding covered loans	418,350	229,182
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Non-accrual	447	4,496
Loans past due 90 days or more and still accruing	0	693
Office | 30-59 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	1,336	58
Office | 60-89 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	49	0
Office | Loans Past Due 90 Days or More
Contractual aging of the recorded investment in loans
Past Due	0	5,189
Other
Contractual aging of the recorded investment in loans
Current	871,881	760,530
Past Due	2,887	2,371
Total loans, excluding covered loans	874,768	762,901
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Non-accrual	531	1,544
Loans past due 90 days or more and still accruing	144	195
Other | 30-59 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	1,646	622
Other | 60-89 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	532	82
Other | Loans Past Due 90 Days or More
Contractual aging of the recorded investment in loans
Past Due	709	1,667
Residential real estate
Contractual aging of the recorded investment in loans
Current	986,386	612,573
Past Due	12,441	15,596
Total loans, excluding covered loans	998,827	628,169
Total loans	1,065,525		650,906
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Non-accrual	16,781	17,951
Loans past due 90 days or more and still accruing	220	253
Residential real estate | 30-59 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	2,347	5,193
Residential real estate | 60-89 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	1,739	1,729
Residential real estate | Loans Past Due 90 Days or More
Contractual aging of the recorded investment in loans
Past Due	8,355	8,674
Construction real estate
Contractual aging of the recorded investment in loans
Current	451,023	252,060
Past Due	0	0
Total loans, excluding covered loans	451,023	252,060
Total loans	465,154		267,992
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Non-accrual	0	0
Loans past due 90 days or more and still accruing	0	0
Construction real estate | 30-59 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	0	0
Construction real estate | 60-89 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	0	0
Construction real estate | Loans Past Due 90 Days or More
Contractual aging of the recorded investment in loans
Past Due	0	0
Indirect vehicle
Contractual aging of the recorded investment in loans
Current	518,881	380,899
Past Due	3,390	3,196
Total loans, excluding covered loans	522,271	384,095
Total loans	522,271		345,731
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Non-accrual	1,955	2,046
Loans past due 90 days or more and still accruing	0	0
Indirect vehicle | 30-59 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	2,301	2,085
Indirect vehicle | 60-89 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	716	698
Indirect vehicle | Loans Past Due 90 Days or More
Contractual aging of the recorded investment in loans
Past Due	373	413
Home equity
Contractual aging of the recorded investment in loans
Current	270,028	207,818
Past Due	5,260	8,755
Total loans, excluding covered loans	275,288	216,573
Total loans	289,174		235,159
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Non-accrual	15,300	18,156
Loans past due 90 days or more and still accruing	0	0
Home equity | 30-59 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	1,475	1,774
Home equity | 60-89 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	490	1,398
Home equity | Loans Past Due 90 Days or More
Contractual aging of the recorded investment in loans
Past Due	3,295	5,583
Other consumer
Contractual aging of the recorded investment in loans
Current	77,570	80,225
Past Due	386	436
Total loans, excluding covered loans	77,956	80,661
Total loans	80,380		$ 90,220
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Non-accrual	9	11
Loans past due 90 days or more and still accruing	91	95
Other consumer | 30-59 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	166	254
Other consumer | 60-89 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	129	84
Other consumer | Loans Past Due 90 Days or More
Contractual aging of the recorded investment in loans
Past Due	91	98
Total loans, excluding purchased credit-impaired loans
Contractual aging of the recorded investment in loans
Current	12,323,330	9,550,663
Past Due	56,028	101,929
Total loans, excluding covered loans	12,379,358	9,652,592
Total loans, excluding purchased credit-impaired loans | 30-59 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	24,833	43,152
Total loans, excluding purchased credit-impaired loans | 60-89 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	10,321	17,489
Total loans, excluding purchased credit-impaired loans | Loans Past Due 90 Days or More
Contractual aging of the recorded investment in loans
Past Due	20,874	41,288
Purchased credit-impaired loans
Contractual aging of the recorded investment in loans
Current	92,346	81,250
Past Due	68,992	60,156
Total loans	161,338	141,406
Purchased credit-impaired loans | 30-59 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	1,108	3,311
Purchased credit-impaired loans | 60-89 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	5,848	4,439
Purchased credit-impaired loans | Loans Past Due 90 Days or More
Contractual aging of the recorded investment in loans
Past Due	62,036	52,406
Total loans
Contractual aging of the recorded investment in loans
Current	12,415,676	9,631,913
Past Due	125,020	162,085
Total loans	12,540,696	9,793,998
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Non-accrual	52,135	98,065
Loans past due 90 days or more and still accruing	1,774	6,596
Total loans | 30-59 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	25,941	46,463
Total loans | 60-89 Days Past Due
Contractual aging of the recorded investment in loans
Past Due	16,169	21,928
Total loans | Loans Past Due 90 Days or More
Contractual aging of the recorded investment in loans
Past Due	$ 82,910	$ 93,694

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Loans (Details 3) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Loans
Total loans, excluding purchased credit impaired loans	$ 12,379,358	$ 9,652,592
Substandard and doubtful loans non-performing	18,100	59,600
Commercial
Loans
Total loans, excluding purchased credit impaired loans	4,385,812	3,616,286
Commercial loans collateralized by assignment of lease payments
Loans
Total loans, excluding purchased credit impaired loans	1,873,380	1,779,072
Healthcare
Loans
Total loans, excluding purchased credit impaired loans	572,228	476,939
Industrial
Loans
Total loans, excluding purchased credit impaired loans	855,632	400,939
Multifamily
Loans
Total loans, excluding purchased credit impaired loans	550,106	400,977
Retail
Loans
Total loans, excluding purchased credit impaired loans	523,717	424,738
Office
Loans
Total loans, excluding purchased credit impaired loans	418,350	229,182
Other
Loans
Total loans, excluding purchased credit impaired loans	874,768	762,901
Construction real estate
Loans
Total loans, excluding purchased credit impaired loans	451,023	252,060
Pass
Loans
Total loans, excluding purchased credit impaired loans	10,157,718	7,976,433
Pass | Commercial
Loans
Total loans, excluding purchased credit impaired loans	4,163,243	3,373,943
Pass | Commercial loans collateralized by assignment of lease payments
Loans
Total loans, excluding purchased credit impaired loans	1,859,012	1,760,674
Pass | Healthcare
Loans
Total loans, excluding purchased credit impaired loans	555,166	472,599
Pass | Industrial
Loans
Total loans, excluding purchased credit impaired loans	831,090	380,200
Pass | Multifamily
Loans
Total loans, excluding purchased credit impaired loans	546,183	396,117
Pass | Retail
Loans
Total loans, excluding purchased credit impaired loans	514,299	393,543
Pass | Office
Loans
Total loans, excluding purchased credit impaired loans	409,124	216,584
Pass | Other
Loans
Total loans, excluding purchased credit impaired loans	828,578	730,713
Pass | Construction real estate
Loans
Total loans, excluding purchased credit impaired loans	451,023	252,060
Special Mention
Loans
Total loans, excluding purchased credit impaired loans	217,609	167,161
Special Mention | Commercial
Loans
Total loans, excluding purchased credit impaired loans	131,163	115,548
Special Mention | Commercial loans collateralized by assignment of lease payments
Loans
Total loans, excluding purchased credit impaired loans	5,504	4,367
Special Mention | Healthcare
Loans
Total loans, excluding purchased credit impaired loans	17,062	4,340
Special Mention | Industrial
Loans
Total loans, excluding purchased credit impaired loans	23,751	19,011
Special Mention | Multifamily
Loans
Total loans, excluding purchased credit impaired loans	312	595
Special Mention | Retail
Loans
Total loans, excluding purchased credit impaired loans	8,646	13,310
Special Mention | Office
Loans
Total loans, excluding purchased credit impaired loans	5,086	3,797
Special Mention | Other
Loans
Total loans, excluding purchased credit impaired loans	26,085	6,193
Special Mention | Construction real estate
Loans
Total loans, excluding purchased credit impaired loans	0	0
Substandard
Loans
Total loans, excluding purchased credit impaired loans	129,689	199,500
Substandard | Commercial
Loans
Total loans, excluding purchased credit impaired loans	91,406	126,795
Substandard | Commercial loans collateralized by assignment of lease payments
Loans
Total loans, excluding purchased credit impaired loans	8,864	14,031
Substandard | Healthcare
Loans
Total loans, excluding purchased credit impaired loans	0	0
Substandard | Industrial
Loans
Total loans, excluding purchased credit impaired loans	791	1,728
Substandard | Multifamily
Loans
Total loans, excluding purchased credit impaired loans	3,611	4,265
Substandard | Retail
Loans
Total loans, excluding purchased credit impaired loans	772	17,885
Substandard | Office
Loans
Total loans, excluding purchased credit impaired loans	4,140	8,801
Substandard | Other
Loans
Total loans, excluding purchased credit impaired loans	20,105	25,995
Substandard | Construction real estate
Loans
Total loans, excluding purchased credit impaired loans	0	0
Doubtful
Loans
Total loans, excluding purchased credit impaired loans	0	0
Doubtful | Commercial
Loans
Total loans, excluding purchased credit impaired loans	0	0
Doubtful | Commercial loans collateralized by assignment of lease payments
Loans
Total loans, excluding purchased credit impaired loans	0	0
Doubtful | Healthcare
Loans
Total loans, excluding purchased credit impaired loans	0	0
Doubtful | Industrial
Loans
Total loans, excluding purchased credit impaired loans	0	0
Doubtful | Multifamily
Loans
Total loans, excluding purchased credit impaired loans	0	0
Doubtful | Retail
Loans
Total loans, excluding purchased credit impaired loans	0	0
Doubtful | Office
Loans
Total loans, excluding purchased credit impaired loans	0	0
Doubtful | Other
Loans
Total loans, excluding purchased credit impaired loans	0	0
Doubtful | Construction real estate
Loans
Total loans, excluding purchased credit impaired loans	0	0
Total
Loans
Total loans, excluding purchased credit impaired loans	10,505,016	8,343,094
Total | Commercial
Loans
Total loans, excluding purchased credit impaired loans	4,385,812	3,616,286
Total | Commercial loans collateralized by assignment of lease payments
Loans
Total loans, excluding purchased credit impaired loans	1,873,380	1,779,072
Total | Healthcare
Loans
Total loans, excluding purchased credit impaired loans	572,228	476,939
Total | Industrial
Loans
Total loans, excluding purchased credit impaired loans	855,632	400,939
Total | Multifamily
Loans
Total loans, excluding purchased credit impaired loans	550,106	400,977
Total | Retail
Loans
Total loans, excluding purchased credit impaired loans	523,717	424,738
Total | Office
Loans
Total loans, excluding purchased credit impaired loans	418,350	229,182
Total | Other
Loans
Total loans, excluding purchased credit impaired loans	874,768	762,901
Total | Construction real estate
Loans
Total loans, excluding purchased credit impaired loans	$ 451,023	$ 252,060

XML

Loans (Details 4) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Loans
Total loans, excluding purchased credit impaired loans	$ 12,379,358	$ 9,652,592
Mortgage loans in process of foreclosure	23,600	20,800
Residential real estate
Loans
Total loans, excluding purchased credit impaired loans	998,827	628,169
Indirect vehicle
Loans
Total loans, excluding purchased credit impaired loans	522,271	384,095
Home equity
Loans
Total loans, excluding purchased credit impaired loans	275,288	216,573
Other consumer loans
Loans
Total loans, excluding purchased credit impaired loans	77,956	80,661
Total
Loans
Total loans, excluding purchased credit impaired loans	1,874,342	1,309,498
Performing | Residential real estate
Loans
Total loans, excluding purchased credit impaired loans	981,826	609,965
Performing | Indirect vehicle
Loans
Total loans, excluding purchased credit impaired loans	520,316	382,049
Performing | Home equity
Loans
Total loans, excluding purchased credit impaired loans	259,988	198,417
Performing | Other consumer loans
Loans
Total loans, excluding purchased credit impaired loans	77,856	80,555
Performing | Total
Loans
Total loans, excluding purchased credit impaired loans	1,839,986	1,270,986
Non-performing | Residential real estate
Loans
Total loans, excluding purchased credit impaired loans	17,001	18,204
Non-performing | Indirect vehicle
Loans
Total loans, excluding purchased credit impaired loans	1,955	2,046
Non-performing | Home equity
Loans
Total loans, excluding purchased credit impaired loans	15,300	18,156
Non-performing | Other consumer loans
Loans
Total loans, excluding purchased credit impaired loans	100	106
Non-performing | Total
Loans
Total loans, excluding purchased credit impaired loans	$ 34,356	$ 38,512

XML

Loans (Details 5) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2016 USD ($) loan	Sep. 30, 2016 USD ($) loan	Dec. 31, 2015 USD ($) loan
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	$ 80,998	$ 80,998	$ 117,644
Recorded Investment	74,537	74,537	114,465
Partial Charge-offs	6,461	6,461	3,179
Allowance for Loan Losses Allocated	15,343	15,343	21,937
Average Recorded Investment	75,218	90,421	108,854
Interest Income Recognized	27	45	$ 202
Restructured loans	$ 21,385	$ 21,385
Minimum period of sustained repayment required to return note to accrual status		6 months
Restructured loans number of A and B structures | loan	1	1	1
Restructured loans representing A And B structures	$ 943	$ 943	$ 1,000
Commercial
Loans individually evaluated for impairment by class of loans
Restructured loans	16,351	16,351
Commercial | Impaired Financing Receivable With No Allowance
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	1,808	1,808	11,253
Recorded Investment	1,808	1,808	11,253
Partial Charge-offs	0	0	0
Allowance for Loan Losses Allocated	0	0	0
Average Recorded Investment	1,871	2,377	6,628
Interest Income Recognized	0	0	0
Commercial | Impaired Financing Receivable With Allowance
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	17,476	17,476	23,394
Recorded Investment	17,476	17,476	23,394
Partial Charge-offs	0	0	0
Allowance for Loan Losses Allocated	5,401	5,401	7,523
Average Recorded Investment	19,180	26,513	18,820
Interest Income Recognized	0	0	0
Commercial loans collateralized by assignment of lease payments
Loans individually evaluated for impairment by class of loans
Restructured loans	0	0
Commercial loans collateralized by assignment of lease payments | Impaired Financing Receivable With No Allowance
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	1,161	1,161	3,453
Recorded Investment	794	794	2,949
Partial Charge-offs	367	367	504
Allowance for Loan Losses Allocated	0	0	0
Average Recorded Investment	1,141	1,026	1,035
Interest Income Recognized	27	27	54
Commercial loans collateralized by assignment of lease payments | Impaired Financing Receivable With Allowance
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	7,260	7,260	3,297
Recorded Investment	7,260	7,260	3,297
Partial Charge-offs	0	0	0
Allowance for Loan Losses Allocated	3,933	3,933	1,790
Average Recorded Investment	5,086	3,201	4,013
Interest Income Recognized	0	18	104
Healthcare
Loans individually evaluated for impairment by class of loans
Restructured loans	0	0
Healthcare | Impaired Financing Receivable With No Allowance
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	0	0	0
Recorded Investment	0	0	0
Partial Charge-offs	0	0	0
Allowance for Loan Losses Allocated	0	0	0
Average Recorded Investment	0	0	0
Interest Income Recognized	0	0	0
Healthcare | Impaired Financing Receivable With Allowance
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	0	0	0
Recorded Investment	0	0	0
Partial Charge-offs	0	0	0
Allowance for Loan Losses Allocated	0	0	0
Average Recorded Investment	0	0	0
Interest Income Recognized	0	0	0
Industrial
Loans individually evaluated for impairment by class of loans
Restructured loans	0	0
Industrial | Impaired Financing Receivable With No Allowance
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	0	0	820
Recorded Investment	0	0	757
Partial Charge-offs	0	0	63
Allowance for Loan Losses Allocated	0	0	0
Average Recorded Investment	0	536	3,467
Interest Income Recognized	0	0	0
Industrial | Impaired Financing Receivable With Allowance
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	0	0	0
Recorded Investment	0	0	0
Partial Charge-offs	0	0	0
Allowance for Loan Losses Allocated	0	0	0
Average Recorded Investment	0	0	228
Interest Income Recognized	0	0	0
Multifamily
Loans individually evaluated for impairment by class of loans
Restructured loans	0	0
Multifamily | Impaired Financing Receivable With No Allowance
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	1,981	1,981	575
Recorded Investment	1,981	1,981	575
Partial Charge-offs	0	0	0
Allowance for Loan Losses Allocated	0	0	0
Average Recorded Investment	2,334	2,362	1,540
Interest Income Recognized	0	0	17
Multifamily | Impaired Financing Receivable With Allowance
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	0	0	2,155
Recorded Investment	0	0	2,155
Partial Charge-offs	0	0	0
Allowance for Loan Losses Allocated	0	0	17
Average Recorded Investment	0	0	3,307
Interest Income Recognized	0	0	27
Retail
Loans individually evaluated for impairment by class of loans
Restructured loans	0	0
Retail | Impaired Financing Receivable With No Allowance
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	2,683	2,683	7,872
Recorded Investment	943	943	6,131
Partial Charge-offs	1,740	1,740	1,741
Allowance for Loan Losses Allocated	0	0	0
Average Recorded Investment	949	2,577	2,768
Interest Income Recognized	0	0	0
Retail | Impaired Financing Receivable With Allowance
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	3,606	3,606	16,034
Recorded Investment	3,606	3,606	16,034
Partial Charge-offs	0	0	0
Allowance for Loan Losses Allocated	363	363	4,926
Average Recorded Investment	3,612	7,911	8,885
Interest Income Recognized	0	0	0
Office
Loans individually evaluated for impairment by class of loans
Restructured loans	0	0
Office | Impaired Financing Receivable With No Allowance
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	0	0	1,608
Recorded Investment	0	0	1,031
Partial Charge-offs	0	0	577
Allowance for Loan Losses Allocated	0	0	0
Average Recorded Investment	0	342	1,663
Interest Income Recognized	0	0	0
Office | Impaired Financing Receivable With Allowance
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	0	0	2,929
Recorded Investment	0	0	2,929
Partial Charge-offs	0	0	0
Allowance for Loan Losses Allocated	0	0	1,717
Average Recorded Investment	0	995	2,457
Interest Income Recognized	0	0	0
Other
Loans individually evaluated for impairment by class of loans
Restructured loans	0	0
Other | Impaired Financing Receivable With No Allowance
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	0	0	0
Recorded Investment	0	0	0
Partial Charge-offs	0	0	0
Allowance for Loan Losses Allocated	0	0	0
Average Recorded Investment	0	80	965
Interest Income Recognized	0	0	0
Other | Impaired Financing Receivable With Allowance
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	0	0	592
Recorded Investment	0	0	592
Partial Charge-offs	0	0	0
Allowance for Loan Losses Allocated	0	0	199
Average Recorded Investment	0	314	9,629
Interest Income Recognized	0	0	0
Residential real estate
Loans individually evaluated for impairment by class of loans
Restructured loans	740	740
Residential real estate | Impaired Financing Receivable With No Allowance
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	0	0	970
Recorded Investment	0	0	970
Partial Charge-offs	0	0	0
Allowance for Loan Losses Allocated	0	0	0
Average Recorded Investment	0	0	717
Interest Income Recognized	0	0	0
Residential real estate | Impaired Financing Receivable With Allowance
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	15,117	15,117	12,950
Recorded Investment	13,268	13,268	12,769
Partial Charge-offs	1,849	1,849	181
Allowance for Loan Losses Allocated	2,394	2,394	2,634
Average Recorded Investment	13,325	13,068	13,484
Interest Income Recognized	0	0	0
Construction real estate
Loans individually evaluated for impairment by class of loans
Restructured loans	0	0
Construction real estate | Impaired Financing Receivable With No Allowance
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	0	0	0
Recorded Investment	0	0	0
Partial Charge-offs	0	0	0
Allowance for Loan Losses Allocated	0	0	0
Average Recorded Investment	0	0	0
Interest Income Recognized	0	0	0
Construction real estate | Impaired Financing Receivable With Allowance
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	0	0	0
Recorded Investment	0	0	0
Partial Charge-offs	0	0	0
Allowance for Loan Losses Allocated	0	0	0
Average Recorded Investment	0	0	214
Interest Income Recognized	0	0	0
Indirect vehicle
Loans individually evaluated for impairment by class of loans
Restructured loans	183	183
Indirect vehicle | Impaired Financing Receivable With No Allowance
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	218	218	0
Recorded Investment	125	125	0
Partial Charge-offs	93	93	0
Allowance for Loan Losses Allocated	0	0	0
Average Recorded Investment	277	292	0
Interest Income Recognized	0	0	0
Indirect vehicle | Impaired Financing Receivable With Allowance
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	0	0	119
Recorded Investment	0	0	119
Partial Charge-offs	0	0	0
Allowance for Loan Losses Allocated	0	0	0
Average Recorded Investment	0	0	287
Interest Income Recognized	0	0	0
Home equity
Loans individually evaluated for impairment by class of loans
Restructured loans	4,111	4,111
Home equity | Impaired Financing Receivable With No Allowance
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	0	0	927
Recorded Investment	0	0	927
Partial Charge-offs	0	0	0
Allowance for Loan Losses Allocated	0	0	0
Average Recorded Investment	0	192	1,000
Interest Income Recognized	0	0	0
Home equity | Impaired Financing Receivable With Allowance
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	29,688	29,688	28,696
Recorded Investment	27,276	27,276	28,583
Partial Charge-offs	2,412	2,412	113
Allowance for Loan Losses Allocated	3,252	3,252	3,131
Average Recorded Investment	27,443	28,635	27,747
Interest Income Recognized	0	0	0
Other consumer
Loans individually evaluated for impairment by class of loans
Restructured loans	0	0
Other consumer | Impaired Financing Receivable With No Allowance
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	0	0	0
Recorded Investment	0	0	0
Partial Charge-offs	0	0	0
Allowance for Loan Losses Allocated	0	0	0
Average Recorded Investment	0	0	0
Interest Income Recognized	0	0	0
Other consumer | Impaired Financing Receivable With Allowance
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	0	0	0
Recorded Investment	0	0	0
Partial Charge-offs	0	0	0
Allowance for Loan Losses Allocated	0	0	0
Average Recorded Investment	0	0	0
Interest Income Recognized	0	0	0
Performing
Loans individually evaluated for impairment by class of loans
Restructured loans	28,561	28,561	26,991
Non-performing
Loans individually evaluated for impairment by class of loans
Restructured loans	$ 23,397	$ 23,397	$ 23,619

XML

Loans (Details 6) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016 USD ($) loan	Sep. 30, 2015 USD ($) loan	Sep. 30, 2016 USD ($) loan	Sep. 30, 2015 USD ($) loan
Restructured loans
Redefaulted loans			$ 224
Period past due of recorded redefaulted loans (in days)			90 days
Performing
Restructured loans
Number of Loans | loan	4	4	7	17
Pre-Modification Recorded Investment	$ 203	$ 477	$ 2,482	$ 4,370
Post-Modification Recorded Investment	203	477	2,482	4,370
Charge-offs and Specific Reserves	$ 30	$ 0	$ 442	$ 0
Performing | Commercial
Restructured loans
Number of Loans | loan			1	1
Pre-Modification Recorded Investment			$ 1,870	$ 80
Post-Modification Recorded Investment			1,870	80
Charge-offs and Specific Reserves			$ 412	$ 0
Performing | Residential real estate
Restructured loans
Number of Loans | loan	2		2
Pre-Modification Recorded Investment	$ 101		$ 101
Post-Modification Recorded Investment	101		101
Charge-offs and Specific Reserves	$ 18		$ 18
Performing | Home equity
Restructured loans
Number of Loans | loan	2	4	4	16
Pre-Modification Recorded Investment	$ 102	$ 477	$ 511	$ 4,290
Post-Modification Recorded Investment	102	477	511	4,290
Charge-offs and Specific Reserves	$ 12	$ 0	$ 12	$ 0
Non-performing
Restructured loans
Number of Loans | loan	19	11	66	24
Pre-Modification Recorded Investment	$ 6,881	$ 595	$ 18,903	$ 1,897
Post-Modification Recorded Investment	6,881	595	18,903	1,897
Charge-offs and Specific Reserves	$ 1,664	$ 24	$ 5,273	$ 170
Non-performing | Commercial
Restructured loans
Number of Loans | loan	3		7
Pre-Modification Recorded Investment	$ 5,874		$ 14,481
Post-Modification Recorded Investment	5,874		14,481
Charge-offs and Specific Reserves	$ 1,490		$ 4,990
Non-performing | Multifamily
Restructured loans
Number of Loans | loan				1
Pre-Modification Recorded Investment				$ 334
Post-Modification Recorded Investment				334
Charge-offs and Specific Reserves				$ 0
Non-performing | Residential real estate
Restructured loans
Number of Loans | loan	4		6	1
Pre-Modification Recorded Investment	$ 484		$ 639	$ 140
Post-Modification Recorded Investment	484		639	140
Charge-offs and Specific Reserves	$ 85		$ 85	$ 17
Non-performing | Indirect vehicle
Restructured loans
Number of Loans | loan	7	7	25	13
Pre-Modification Recorded Investment	$ 34	$ 45	$ 183	$ 75
Post-Modification Recorded Investment	34	45	183	75
Charge-offs and Specific Reserves	$ 17	$ 16	$ 60	$ 23
Non-performing | Home equity
Restructured loans
Number of Loans | loan	5	4	28	9
Pre-Modification Recorded Investment	$ 489	$ 550	$ 3,600	$ 1,348
Post-Modification Recorded Investment	489	550	3,600	1,348
Charge-offs and Specific Reserves	$ 72	$ 8	$ 138	$ 130

XML

Loans (Details 7) $ in Thousands	9 Months Ended
	Sep. 30, 2016 USD ($)
Financing Receivable, Modifications, Post Modification Recorded Investment [Roll Forward]
Ending balance	$ 21,385
Performing
Financing Receivable, Modifications, Post Modification Recorded Investment [Roll Forward]
Beginning balance	26,991
Additions	2,482
Charge-offs	0
Principal payments, net	(2,145)
Removals	(1,655)
Transfer to other real estate owned	0
Transfers in	3,677
Transfers out	(789)
Ending balance	28,561
Non-performing
Financing Receivable, Modifications, Post Modification Recorded Investment [Roll Forward]
Beginning balance	23,619
Additions	18,903
Charge-offs	(1,046)
Principal payments, net	(8,695)
Removals	(6,384)
Transfer to other real estate owned	(112)
Transfers in	789
Transfers out	(3,677)
Ending balance	$ 23,397

XML

Loans (Details 8) $ in Thousands	Sep. 30, 2016 USD ($)
Activity in the allowance for loan losses, balance in allowance for loan losses and recorded investment in loans by portfolio segment and based on impairment method
Extended Maturity and Amortization and Reduction of Interest Rate	$ 3,704
Extended Maturity and/or Amortization	15,557
Delay in Payments or Reduction of Interest Rate	2,124
Total	21,385
Commercial
Activity in the allowance for loan losses, balance in allowance for loan losses and recorded investment in loans by portfolio segment and based on impairment method
Extended Maturity and Amortization and Reduction of Interest Rate	0
Extended Maturity and/or Amortization	14,481
Delay in Payments or Reduction of Interest Rate	1,870
Total	16,351
Commercial loans collateralized by assignment of lease payments
Activity in the allowance for loan losses, balance in allowance for loan losses and recorded investment in loans by portfolio segment and based on impairment method
Extended Maturity and Amortization and Reduction of Interest Rate	0
Extended Maturity and/or Amortization	0
Delay in Payments or Reduction of Interest Rate	0
Total	0
Healthcare
Activity in the allowance for loan losses, balance in allowance for loan losses and recorded investment in loans by portfolio segment and based on impairment method
Extended Maturity and Amortization and Reduction of Interest Rate	0
Extended Maturity and/or Amortization	0
Delay in Payments or Reduction of Interest Rate	0
Total	0
Industrial
Activity in the allowance for loan losses, balance in allowance for loan losses and recorded investment in loans by portfolio segment and based on impairment method
Extended Maturity and Amortization and Reduction of Interest Rate	0
Extended Maturity and/or Amortization	0
Delay in Payments or Reduction of Interest Rate	0
Total	0
Multifamily
Activity in the allowance for loan losses, balance in allowance for loan losses and recorded investment in loans by portfolio segment and based on impairment method
Extended Maturity and Amortization and Reduction of Interest Rate	0
Extended Maturity and/or Amortization	0
Delay in Payments or Reduction of Interest Rate	0
Total	0
Retail
Activity in the allowance for loan losses, balance in allowance for loan losses and recorded investment in loans by portfolio segment and based on impairment method
Extended Maturity and Amortization and Reduction of Interest Rate	0
Extended Maturity and/or Amortization	0
Delay in Payments or Reduction of Interest Rate	0
Total	0
Office
Activity in the allowance for loan losses, balance in allowance for loan losses and recorded investment in loans by portfolio segment and based on impairment method
Extended Maturity and Amortization and Reduction of Interest Rate	0
Extended Maturity and/or Amortization	0
Delay in Payments or Reduction of Interest Rate	0
Total	0
Other
Activity in the allowance for loan losses, balance in allowance for loan losses and recorded investment in loans by portfolio segment and based on impairment method
Extended Maturity and Amortization and Reduction of Interest Rate	0
Extended Maturity and/or Amortization	0
Delay in Payments or Reduction of Interest Rate	0
Total	0
Residential real estate
Activity in the allowance for loan losses, balance in allowance for loan losses and recorded investment in loans by portfolio segment and based on impairment method
Extended Maturity and Amortization and Reduction of Interest Rate	484
Extended Maturity and/or Amortization	256
Delay in Payments or Reduction of Interest Rate	0
Total	740
Construction real estate
Activity in the allowance for loan losses, balance in allowance for loan losses and recorded investment in loans by portfolio segment and based on impairment method
Extended Maturity and Amortization and Reduction of Interest Rate	0
Extended Maturity and/or Amortization	0
Delay in Payments or Reduction of Interest Rate	0
Total	0
Indirect vehicle
Activity in the allowance for loan losses, balance in allowance for loan losses and recorded investment in loans by portfolio segment and based on impairment method
Extended Maturity and Amortization and Reduction of Interest Rate	0
Extended Maturity and/or Amortization	0
Delay in Payments or Reduction of Interest Rate	183
Total	183
Home equity
Activity in the allowance for loan losses, balance in allowance for loan losses and recorded investment in loans by portfolio segment and based on impairment method
Extended Maturity and Amortization and Reduction of Interest Rate	3,220
Extended Maturity and/or Amortization	820
Delay in Payments or Reduction of Interest Rate	71
Total	4,111
Other consumer loans
Activity in the allowance for loan losses, balance in allowance for loan losses and recorded investment in loans by portfolio segment and based on impairment method
Extended Maturity and Amortization and Reduction of Interest Rate	0
Extended Maturity and/or Amortization	0
Delay in Payments or Reduction of Interest Rate	0
Total	$ 0

XML

Loans (Details 9) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Allowance for credit losses [Roll Forward]
Beginning balance				$ 128,140
Ending balance		$ 139,528		139,528
Ending allowance balance attributable to loans:
Acquired and accounted for under ASC 310-30	[1]	698	$ 1,830	698	$ 1,830
Unfunded Commitments
Allowance for unfunded credit commitments, beginning balance		2,719	4,060	3,368	4,031
Allowance for unfunded commitments, Provision		152	(648)	(497)	(619)
Individually evaluated for impairment for unfunded commitments		737	1,388	737	1,388
Unfunded commitments collectively evaluated for impairment		2,134	2,024	2,134	2,024
Allowance for unfunded credit commitments, ending balance		2,871	3,412	2,871	3,412
Allowance for credit losses
Allowance for credit losses, beginning balance		138,333	124,130	131,508	114,057
Allowance for loan losses and unfunded commitments charge offs		4,157	5,510	14,169	12,426
Allowance for loan losses and unfunded commitments recoveries		1,674	4,060	8,119	11,779
Allowance for loan losses and unfunded commitments provision		6,549	5,358	16,941	14,628
Allowance for credit losses, individually evaluated for impairment		16,080	20,392	16,080	20,392
Allowance for credit losses, collectively evaluated for impairment		125,621	105,816	125,621	105,816
Acquired and accounted for under ASC 310-30	[1]	698	1,830	698	1,830
Allowance for credit losses, ending balance		142,399	128,038	142,399	128,038
Loans:
Individually evaluated for impairment		74,537	116,287	74,537	116,287
Collectively evaluated for impairment		12,304,821	9,117,201	12,304,821	9,117,201
Acquired and accounted for under ASC 310-30	[1]	161,338	155,693	161,338	155,693
Total loans		12,540,696	9,389,181	12,540,696	9,389,181	$ 9,793,998
Commercial loans
Allowance for credit losses [Roll Forward]
Beginning balance		50,297	39,142	39,316	29,571
Charge-offs		1,341	1,657	2,126	2,283
Recoveries		665	456	1,997	1,514
Provision		(3,894)	5,044	6,540	14,183
Ending balance		45,727	42,985	45,727	42,985
Ending allowance balance attributable to loans:
Individually evaluated for impairment		5,401	7,943	5,401	7,943
Collectively evaluated for impairment		40,161	34,731	40,161	34,731
Acquired and accounted for under ASC 310-30	[1]	165	311	165	311
Allowance for credit losses
Acquired and accounted for under ASC 310-30	[1]	165	311	165	311
Loans:
Individually evaluated for impairment		19,284	36,325	19,284	36,325
Collectively evaluated for impairment		4,366,528	3,404,307	4,366,528	3,404,307
Acquired and accounted for under ASC 310-30	[1]	22,913	37,189	22,913	37,189
Total loans		4,408,725	3,477,821	4,408,725	3,477,821
Commercial loans collateralized by assignment of lease payments
Allowance for credit losses [Roll Forward]
Beginning balance		10,549	11,268	10,434	9,962
Charge-offs		367	1,980	3,288	2,080
Recoveries		3	11	520	1,100
Provision		2,944	985	5,463	1,302
Ending balance		13,129	10,284	13,129	10,284
Ending allowance balance attributable to loans:
Individually evaluated for impairment		3,933	2,618	3,933	2,618
Collectively evaluated for impairment		9,196	7,666	9,196	7,666
Loans:
Individually evaluated for impairment		8,054	6,724	8,054	6,724
Collectively evaluated for impairment		1,865,326	1,686,816	1,865,326	1,686,816
Total loans		1,873,380	1,693,540	1,873,380	1,693,540
Commercial real estate
Allowance for credit losses [Roll Forward]
Beginning balance		46,040	38,076	45,475	41,826
Charge-offs		529	170	2,601	2,312
Recoveries		324	2,402	2,761	6,338
Provision		1,239	1,216	1,439	(4,328)
Ending balance		47,074	41,524	47,074	41,524
Ending allowance balance attributable to loans:
Individually evaluated for impairment		363	3,123	363	3,123
Collectively evaluated for impairment		46,235	36,975	46,235	36,975
Acquired and accounted for under ASC 310-30	[1]	476	1,426	476	1,426
Allowance for credit losses
Acquired and accounted for under ASC 310-30	[1]	476	1,426	476	1,426
Loans:
Individually evaluated for impairment		6,530	29,354	6,530	29,354
Collectively evaluated for impairment		3,788,271	2,550,655	3,788,271	2,550,655
Acquired and accounted for under ASC 310-30	[1]	41,286	47,803	41,286	47,803
Total loans		3,836,087	2,627,812	3,836,087	2,627,812
Residential real estate
Allowance for credit losses [Roll Forward]
Beginning balance		4,800	6,669	5,734	6,646
Charge-offs		290	292	1,134	1,189
Recoveries		45	337	151	417
Provision		1,575	(868)	1,379	(28)
Ending balance		6,130	5,846	6,130	5,846
Ending allowance balance attributable to loans:
Individually evaluated for impairment		2,394	2,834	2,394	2,834
Collectively evaluated for impairment		3,736	3,012	3,736	3,012
Loans:
Individually evaluated for impairment		13,268	14,233	13,268	14,233
Collectively evaluated for impairment		985,559	592,938	985,559	592,938
Acquired and accounted for under ASC 310-30	[1]	66,698	43,735	66,698	43,735
Total loans		1,065,525	650,906	1,065,525	650,906
Construction real estate
Allowance for credit losses [Roll Forward]
Beginning balance		14,230	12,459	15,113	8,918
Charge-offs		7	5	151	11
Recoveries		50	216	94	253
Provision		2,033	123	1,250	3,633
Ending balance		16,306	12,793	16,306	12,793
Ending allowance balance attributable to loans:
Collectively evaluated for impairment		16,249	12,700	16,249	12,700
Acquired and accounted for under ASC 310-30	[1]	57	93	57	93
Allowance for credit losses
Acquired and accounted for under ASC 310-30	[1]	57	93	57	93
Loans:
Collectively evaluated for impairment		451,023	255,620	451,023	255,620
Acquired and accounted for under ASC 310-30	[1]	14,131	12,372	14,131	12,372
Total loans		465,154	267,992	465,154	267,992
Indirect vehicle
Allowance for credit losses [Roll Forward]
Beginning balance		3,100	1,909	2,418	1,687
Charge-offs		838	581	2,420	2,082
Recoveries		436	334	1,400	1,354
Provision		598	512	1,898	1,215
Ending balance		3,296	2,174	3,296	2,174
Ending allowance balance attributable to loans:
Individually evaluated for impairment			8		8
Collectively evaluated for impairment		3,296	2,166	3,296	2,166
Loans:
Individually evaluated for impairment		125	131	125	131
Collectively evaluated for impairment		522,146	345,600	522,146	345,600
Total loans		522,271	345,731	522,271	345,731
Home equity
Allowance for credit losses [Roll Forward]
Beginning balance		4,199	8,412	7,374	9,456
Charge-offs		376	358	1,233	1,078
Recoveries		65	186	576	447
Provision		2,309	(1,490)	(520)	(2,075)
Ending balance		6,197	6,750	6,197	6,750
Ending allowance balance attributable to loans:
Individually evaluated for impairment		3,252	2,478	3,252	2,478
Collectively evaluated for impairment		2,945	4,272	2,945	4,272
Loans:
Individually evaluated for impairment		27,276	29,520	27,276	29,520
Collectively evaluated for impairment		248,012	193,653	248,012	193,653
Acquired and accounted for under ASC 310-30	[1]	13,886	11,986	13,886	11,986
Total loans		289,174	235,159	289,174	235,159
Other consumer
Allowance for credit losses [Roll Forward]
Beginning balance		2,399	2,135	2,276	1,960
Charge-offs		409	467	1,216	1,391
Recoveries		86	118	620	356
Provision		(407)	484	(11)	1,345
Ending balance		1,669	2,270	1,669	2,270
Ending allowance balance attributable to loans:
Collectively evaluated for impairment		1,669	2,270	1,669	2,270
Loans:
Individually evaluated for impairment		0		0
Collectively evaluated for impairment		77,956	87,612	77,956	87,612
Acquired and accounted for under ASC 310-30	[1]	2,424	2,608	2,424	2,608
Total loans		$ 80,380	$ 90,220	80,380	$ 90,220
Purchased loans
Allowance for credit losses [Roll Forward]
Provision				$ (515)

[1] Loans acquired in business combinations and accounted for under ASC Subtopic 310-30 “Receivables — Loans and Debt Securities Acquired with Deteriorated Credit Quality.”

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Loans (Details 10) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Purchased loans
Activity in the allowance for loan losses, balance in allowance for loan losses and recorded investment in loans by portfolio segment and based on impairment method
Provision			$ (515)
Allowance for loan losses and unfunded commitments write offs net of recoveries			864
Commercial real estate
Activity in the allowance for loan losses, balance in allowance for loan losses and recorded investment in loans by portfolio segment and based on impairment method
Provision	$ 1,239	$ 1,216	1,439	$ (4,328)
Allowance for loan losses and unfunded commitments acquired with deteriorated credit quality	$ 698		$ 698		$ 2,100

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Loans (Details 11) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Changes in the accretable yield for purchased credit-impaired loans
Balance at beginning of period		$ 13,160	$ 11,456	$ 12,596	$ 7,434
Purchases		805	0	805	0
Accretion		(2,564)	(1,794)	(7,193)	(5,541)
Other	[1]	2,523	590	7,716	8,359
Balance at end of period		$ 13,924	$ 10,252	$ 13,924	$ 10,252

[1] Primarily includes discount transfers from non-accretable discount to accretable discount due to better than expected performance of loan pools acquired and accounted for under ASC 310-30.

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Loans (Details 12) $ in Thousands	Sep. 30, 2016 USD ($)
Loans
Non covered loans	$ 3,041,830
Total acquired	3,060,449
Purchased Credit-Impaired Loans
Loans
Non covered loans	142,719
Total acquired	161,338
Purchased Non-Credit-Impaired Loans
Loans
Non covered loans	2,899,111
Total acquired	2,899,111
Commercial loans, commercial real estate receivable and construction loans | Heritage
Loans
Loans not covered under the loss share agreement	1,900
Commercial loans, commercial real estate receivable and construction loans | Benchmark
Loans
Loans not covered under the loss share agreement	1,700
Commercial loans, commercial real estate receivable and construction loans | Broadway and New Century
Loans
Loans not covered under the loss share agreement	8,200
Commercial loans
Loans
Non covered loans	994,978
Commercial loans | Purchased Credit-Impaired Loans
Loans
Non covered loans	22,913
Commercial loans | Purchased Non-Credit-Impaired Loans
Loans
Non covered loans	972,065
Commercial loans collateralized by assignment of lease payments
Loans
Non covered loans	72,193
Commercial loans collateralized by assignment of lease payments | Purchased Credit-Impaired Loans
Loans
Non covered loans	0
Commercial loans collateralized by assignment of lease payments | Purchased Non-Credit-Impaired Loans
Loans
Non covered loans	72,193
Commercial real estate
Loans
Non covered loans	1,453,963
Commercial real estate | Purchased Credit-Impaired Loans
Loans
Non covered loans	41,286
Commercial real estate | Purchased Non-Credit-Impaired Loans
Loans
Non covered loans	1,412,677
Construction real estate
Loans
Non covered loans	52,699
Construction real estate | Purchased Credit-Impaired Loans
Loans
Non covered loans	14,131
Construction real estate | Purchased Non-Credit-Impaired Loans
Loans
Non covered loans	38,568
Consumer related
Loans
Covered loans	18,619
Non covered loans	467,997
Consumer related | Purchased Credit-Impaired Loans
Loans
Covered loans	18,619
Non covered loans	64,389
Consumer related | Purchased Credit-Impaired Loans | Ginnie Mae
Loans
Consumer related purchased credit-impaired loans	60,600
Consumer related | Purchased Non-Credit-Impaired Loans
Loans
Covered loans	0
Non covered loans	$ 403,608

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Goodwill and Intangibles (Details)	9 Months Ended
	Sep. 30, 2016 USD ($) segment	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Number of operating segments | segment	3
Impairment loss	$ 0	$ 0
Goodwill	$ 993,799,000		$ 725,070,000
Weighted average amortization period (in years)	13 years

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Goodwill and Intangibles (Details 2) $ in Thousands	9 Months Ended
	Sep. 30, 2016 USD ($)
Goodwill [Roll Forward]
Balance at beginning of period	$ 725,070
Goodwill from business combinations	268,729	[1]
Balance at end of period	993,799
Banking
Goodwill [Roll Forward]
Balance at beginning of period	684,430
Goodwill from business combinations	268,729	[1]
Balance at end of period	953,159
Leasing
Goodwill [Roll Forward]
Balance at beginning of period	40,640
Goodwill from business combinations	0	[1]
Balance at end of period	40,640
Mortgage Banking
Goodwill [Roll Forward]
Balance at beginning of period	0
Goodwill from business combinations	0	[1]
Balance at end of period	$ 0

[1] Due to the American Chartered merger and adjustments recognized for the MSA acquisition.

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Goodwill and Intangibles (Details 3) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Changes in the carrying amount of core deposit and client relationship intangibles
Balance at beginning of period			$ 44,812
Amortization expense	$ (1,674)	$ (1,542)	(4,917)	$ (4,569)
Other intangibles from acquisition			25,500
Balance at end of period	$ 65,395		$ 65,395

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Goodwill and Intangibles (Details 4) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Gross carrying amount	$ 118,792
Accumulated amortization	(53,397)
Net book value	$ 65,395	$ 44,812

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Goodwill and Intangibles (Details 5) $ in Thousands	Sep. 30, 2016 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2016	$ 2,390
2017	8,198
2018	7,456
2019	5,677
2020	5,026
Thereafter	36,648
Total estimated future amortization expense	$ 65,395

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Deposits (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Banking and Thrift [Abstract]
Demand deposit accounts, noninterest bearing	$ 6,410,334	$ 4,627,184
NOW, money market and interest bearing deposits	4,660,407	4,144,633
Savings accounts	1,147,900	974,555
Certificates of deposit, $250,000 or more	1,121,599	877,352
Other certificates of deposit	939,026	881,491
Total deposits	14,279,266	11,505,215
Brokered deposits	$ 759,300	$ 500,200

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Short-Term Borrowings (Details) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Short-term borrowings
Weighted Average Interest Rate	0.36%	0.23%
Amount	$ 1,496,319,000	$ 1,005,737,000
Customer repurchase agreements
Short-term borrowings
Weighted Average Interest Rate	0.21%	0.20%
Amount	$ 256,569,000	$ 201,207,000
Federal Home Loan Bank advances
Short-term borrowings
Weighted Average Interest Rate	0.38%	0.17%
Amount	$ 1,200,000,000	$ 775,000,000
Federal funds purchased
Short-term borrowings
Weighted Average Interest Rate	0.60%	0.09%
Amount	$ 39,750,000	$ 4,530,000
Line of credit
Short-term borrowings
Weighted Average Interest Rate	0.00%	2.18%
Amount	$ 0	$ 25,000,000

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Short-Term Borrowings (Details 2) - USD ($)	Dec. 18, 2015	Sep. 30, 2016	Dec. 31, 2015
Short-term borrowings
Fixed interest rate Federal Home Loan Bank advances		$ 1,200,000,000	$ 775,000,000
Short-term borrowings		1,496,319,000	1,005,737,000
Federal Home Loan Bank advances
Short-term borrowings
Short-term borrowings		1,200,000,000	775,000,000
Line of credit
Short-term borrowings
Line of credit facility, maximum borrowing capacity	$ 35,000,000.0
Description of annual interest rate basis	one month LIBOR
Short-term borrowings		$ 0	$ 25,000,000
Line of credit | LIBOR
Short-term borrowings
Basis spread on variable rate	1.75%
Minimum | Federal Home Loan Bank advances
Short-term borrowings
Effective interest rate of amounts due within one year		0.24%
Maximum | Federal Home Loan Bank advances
Short-term borrowings
Effective interest rate of amounts due within one year		0.40%

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Long-Term Borrowings (Details) - USD ($) $ in Thousands		12 Months Ended
	Aug. 24, 2016	Dec. 31, 2015	Sep. 30, 2016
Long-term borrowings
Federal Home Loan Bank advances		$ 305,200	$ 230,100
Long-term borrowings		400,274	311,645
London Interbank Offered Rate (LIBOR)
Long-term borrowings
Basis spread on variable rate	1.75%
Notes payable to banks
Long-term borrowings
Long-term borrowings		55,000	$ 66,500
Weighted average interest rate			4.22%
Equipment pledged as collateral		65,800	$ 79,000
Unsecured term
Long-term borrowings
Long-term borrowings	$ 16,000		$ 15,000
Quarterly principal payments	$ 1,000
Structured repurchase agreement
Long-term borrowings
Long-term borrowings		$ 40,000
Term of structured repurchase agreement		10 years
Fixed interest rate (as a percent)		4.75%
Minimum | Federal Home Loan Bank advances
Long-term borrowings
Interest rate			0.30%
Minimum | Notes payable to banks
Long-term borrowings
Interest rate			2.46%
Maximum | Federal Home Loan Bank advances
Long-term borrowings
Interest rate			5.87%
Maximum | Notes payable to banks
Long-term borrowings
Interest rate			7.40%

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Junior Subordinated Notes Issued to Capital Trusts (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2016	Dec. 31, 2015
Junior Subordinated Notes
Principal balance		$ 209,159	$ 186,164
Junior Subordinated Notes | Maximum
Investment Owned, Balance [Abstract]
Period for deferment of payment of interest on notes (in years)		5 years
Coal City Capital Trust I | Trust Preferred Securities
Junior Subordinated Notes
Basis spread on variable rate		1.80%
Description of annual interest rate basis		3-mo LIBOR
Investment Owned, Balance [Abstract]
Face Value		$ 25,000
Coal City Capital Trust I | Junior Subordinated Notes
Junior Subordinated Notes
Principal balance		$ 25,774
Basis spread on variable rate		1.80%
Description of annual interest rate basis		3-mo LIBOR
MB Financial Capital Trust II | Trust Preferred Securities
Junior Subordinated Notes
Basis spread on variable rate		1.40%
Description of annual interest rate basis		3-mo LIBOR
Investment Owned, Balance [Abstract]
Face Value		$ 35,000
MB Financial Capital Trust II | Junior Subordinated Notes
Junior Subordinated Notes
Principal balance		$ 36,083
Basis spread on variable rate		1.40%
Description of annual interest rate basis		3-mo LIBOR
MB Financial Capital Trust III | Trust Preferred Securities
Junior Subordinated Notes
Basis spread on variable rate		1.50%
Description of annual interest rate basis		3-mo LIBOR
Investment Owned, Balance [Abstract]
Face Value		$ 10,000
MB Financial Capital Trust III | Junior Subordinated Notes
Junior Subordinated Notes
Principal balance		$ 10,310
Basis spread on variable rate		1.50%
Description of annual interest rate basis		3-mo LIBOR
MB Financial Capital Trust IV | Trust Preferred Securities
Junior Subordinated Notes
Basis spread on variable rate		1.52%
Description of annual interest rate basis		3-mo LIBOR
Investment Owned, Balance [Abstract]
Face Value		$ 20,000
MB Financial Capital Trust IV | Junior Subordinated Notes
Junior Subordinated Notes
Principal balance		$ 20,619
Basis spread on variable rate		1.52%
Description of annual interest rate basis		3-mo LIBOR
MB Financial Capital Trust V | Trust Preferred Securities
Junior Subordinated Notes
Basis spread on variable rate		1.30%
Description of annual interest rate basis		3-mo LIBOR
Investment Owned, Balance [Abstract]
Face Value		$ 30,000
MB Financial Capital Trust V | Junior Subordinated Notes
Junior Subordinated Notes
Principal balance		$ 30,928
Basis spread on variable rate		1.30%
Description of annual interest rate basis		3-mo LIBOR
MB Financial Capital Trust VI | Trust Preferred Securities
Junior Subordinated Notes
Basis spread on variable rate		1.30%
Description of annual interest rate basis		3-mo LIBOR
Investment Owned, Balance [Abstract]
Face Value		$ 22,500
MB Financial Capital Trust VI | Junior Subordinated Notes
Junior Subordinated Notes
Principal balance		$ 23,196
Basis spread on variable rate		1.30%
Description of annual interest rate basis		3-mo LIBOR
FOBB Statutory Trust III | Trust Preferred Securities
Junior Subordinated Notes
Basis spread on variable rate	[1]	2.80%
Description of annual interest rate basis	[1]	3-mo LIBOR
Investment Owned, Balance [Abstract]
Face Value	[1]	$ 5,000
FOBB Statutory Trust III | Junior Subordinated Notes
Junior Subordinated Notes
Principal balance	[1]	$ 5,155
Basis spread on variable rate	[1]	2.80%
Description of annual interest rate basis	[1]	3-mo LIBOR
TAYC Capital Trust II
Investment Owned, Balance [Abstract]
Purchase accounting adjustments discount		$ 6,800
TAYC Capital Trust II | Trust Preferred Securities
Junior Subordinated Notes
Basis spread on variable rate	[2]	2.68%
Description of annual interest rate basis	[2]	3-mo LIBOR
Investment Owned, Balance [Abstract]
Face Value	[2]	$ 40,000
TAYC Capital Trust II | Junior Subordinated Notes
Junior Subordinated Notes
Principal balance	[2]	$ 41,238
Basis spread on variable rate	[2]	2.68%
Description of annual interest rate basis	[2]	3-mo LIBOR
American Chartered Statutory Trust I | Trust Preferred Securities
Junior Subordinated Notes
Basis spread on variable rate	[3]	3.60%
Description of annual interest rate basis	[3]	3-mo LIBOR
Investment Owned, Balance [Abstract]
Face Value	[3]	$ 20,000
American Chartered Statutory Trust I | Junior Subordinated Notes
Junior Subordinated Notes
Principal balance	[3]	$ 20,619
Basis spread on variable rate	[3]	3.60%
Description of annual interest rate basis	[3]	3-mo LIBOR
American Chartered Statutory Trust II | Trust Preferred Securities
Junior Subordinated Notes
Basis spread on variable rate	[3]	2.75%
Description of annual interest rate basis	[3]	3-mo LIBOR
Investment Owned, Balance [Abstract]
Face Value	[3]	$ 10,000
American Chartered Statutory Trust II | Junior Subordinated Notes
Junior Subordinated Notes
Principal balance	[3]	$ 10,464
Basis spread on variable rate	[3]	2.75%
Description of annual interest rate basis	[3]	3-mo LIBOR
American Chartered Statutory Trust I and II
Investment Owned, Balance [Abstract]
Purchase accounting adjustments discount		$ 8,000

[1] FOBB Statutory Trust III was established by First Oak Brook Bancshares, Inc. (“FOBB”) prior to the Company's acquisition of FOBB in 2006, and the junior subordinated notes issued by FOBB to FOBB Statutory Trust III were assumed by the Company upon completion of the acquisition.

[2] TAYC Capital Trust II was established by Taylor Capital Group, Inc. (“Taylor Capital”) prior to the Company's acquisition of Taylor Capital in 2014, and the junior subordinated notes issued by Taylor Capital to TAYC Capital Trust II were assumed by the Company upon completion of the acquisition. Principal balance and face value amounts associated with TAYC Capital Trust II do not include purchase accounting adjustments to such amounts, which in each case resulted in a discount of $6.8 million.

[3] American Chartered Statutory Trust I and American Chartered Statutory Trust II were established by American Chartered prior to the Company's acquisition of American Chartered in August 2016, and the junior subordinated notes issued by American Chartered to American Chartered Statutory Trust I and American Chartered Statutory Trust II were assumed by the Company upon completion of the acquisition. Principal balance and face value amounts associated with American Chartered Statutory Trust I and American Chartered Statutory Trust II do not include purchase accounting adjustments to such amounts, which in each case resulted in a discount of $8.0 million.

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Commitments and Contingencies (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Commitments [Abstract]
Maximum maturity period for letters of credit (in years)	5 years
Increase in maximum potential amount of future payments under letters of credit	$ 38,900
Dollar amount of letters of credit outstanding	177,900	$ 139,100
Letters of credit issued or renewed	121,000
Capital expenditure commitments outstanding	7,100
Home equity lines
Long-term Purchase Commitment [Line Items]
Dollar amount of line of credit outstanding	243,331	187,478
Other commitments
Long-term Purchase Commitment [Line Items]
Dollar amount of line of credit outstanding	3,596,246	3,049,152
Standby
Long-term Purchase Commitment [Line Items]
Dollar amount of line of credit outstanding	172,737	137,945
Commercial
Long-term Purchase Commitment [Line Items]
Dollar amount of line of credit outstanding	$ 5,211	$ 1,108

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Commitments and Contingencies (Details 2)	9 Months Ended
	Sep. 30, 2016
States and political subdivisions | State of Illinois
Concentrations of credit risk
Percentage of investments issued by states and political subdivisions that were within the state of Illinois	21.00%

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Fair Value Measurements (Details) - USD ($) $ in Thousands		Sep. 30, 2016	Dec. 31, 2015
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		$ 1,859,356	$ 1,585,023
Loans held for sale		899,412	744,727
Loans		12,379,358	9,652,592
Mortgage servicing rights		154,730	168,162
Derivative financial instruments		49,510	10,062
Derivative financial instruments		68,515	34,338
U.S Government sponsored agencies and enterprises
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		53,968	64,611
States and political subdivisions
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		410,737	396,367
Residential mortgage-backed securities
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		1,076,337	763,549
Commercial mortgage-backed securities
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		96,993	130,107
Corporate bonds
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		210,193	219,628
Equity securities
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		11,128	10,761
Recurring basis
Financial assets and financial liabilities measured at fair value on a recurring basis
Loans held for sale		899,412	744,727
Loans		19,121	25,869
Assets held in trust for deferred compensation		18,937	16,820
Other liabilities	[1]	18,937	16,333
Derivative financial instruments		70,330	36,974
Recurring basis | U.S Government sponsored agencies and enterprises
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		53,968	64,611
Recurring basis | States and political subdivisions
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		410,737	396,367
Recurring basis | Residential mortgage-backed securities
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		1,076,337	763,549
Recurring basis | Commercial mortgage-backed securities
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		96,993	130,107
Recurring basis | Corporate bonds
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		210,193	219,628
Recurring basis | Equity securities
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		11,128	10,761
Recurring basis | Mortgage servicing rights
Financial assets and financial liabilities measured at fair value on a recurring basis
Mortgage servicing rights		154,730	168,162
Recurring basis | Derivative financial instruments
Financial assets and financial liabilities measured at fair value on a recurring basis
Derivative financial instruments		112,208	42,846
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		11,128	10,761
Loans held for sale		0	0
Assets held in trust for deferred compensation		18,937	16,820
Derivative financial instruments		1,347	5,118
Other liabilities	[1]	18,937	16,333
Derivative financial instruments		6,001	6,050
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity securities
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		11,128	10,761
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Derivative financial instruments
Financial assets and financial liabilities measured at fair value on a recurring basis
Derivative financial instruments		1,347	5,118
Recurring basis | Significant Other Observable Inputs (Level 2)
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		1,847,606	1,573,489
Loans held for sale		899,412	744,727
Loans		19,121	25,869
Derivative financial instruments		98,300	33,906
Derivative financial instruments		64,329	30,924
Recurring basis | Significant Other Observable Inputs (Level 2) | U.S Government sponsored agencies and enterprises
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		53,968	64,611
Recurring basis | Significant Other Observable Inputs (Level 2) | States and political subdivisions
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		410,320	395,950
Recurring basis | Significant Other Observable Inputs (Level 2) | Residential mortgage-backed securities
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		1,076,132	763,193
Recurring basis | Significant Other Observable Inputs (Level 2) | Commercial mortgage-backed securities
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		96,993	130,107
Recurring basis | Significant Other Observable Inputs (Level 2) | Corporate bonds
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		210,193	219,628
Recurring basis | Significant Other Observable Inputs (Level 2) | Derivative financial instruments
Financial assets and financial liabilities measured at fair value on a recurring basis
Derivative financial instruments		98,300	33,906
Recurring basis | Significant Unobservable Inputs (Level 3)
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		622	773
Loans held for sale		0	0
Derivative financial instruments		12,561	3,822
Derivative financial instruments		0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | States and political subdivisions
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		417	417
Recurring basis | Significant Unobservable Inputs (Level 3) | Residential mortgage-backed securities
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		205	356
Recurring basis | Significant Unobservable Inputs (Level 3) | Mortgage servicing rights
Financial assets and financial liabilities measured at fair value on a recurring basis
Mortgage servicing rights		154,730	168,162
Recurring basis | Significant Unobservable Inputs (Level 3) | Derivative financial instruments
Financial assets and financial liabilities measured at fair value on a recurring basis
Derivative financial instruments		$ 12,561	$ 3,822

[1] Liabilities associated with assets held in trust for deferred compensation

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Fair Value Measurements (Details 2) - USD ($)	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale	$ 1,859,356,000	$ 1,585,023,000
Mortgage servicing rights	154,730,000	168,162,000
Derivative financial instruments	49,510,000	10,062,000
States and political subdivisions
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale	410,737,000	396,367,000
Residential mortgage-backed securities
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale	1,076,337,000	763,549,000
Recurring basis | States and political subdivisions
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale	410,737,000	396,367,000
Recurring basis | Residential mortgage-backed securities
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale	1,076,337,000	763,549,000
Recurring basis | Mortgage servicing rights
Financial assets and financial liabilities measured at fair value on a recurring basis
Mortgage servicing rights	154,730,000	168,162,000
Recurring basis | Derivative financial instruments
Financial assets and financial liabilities measured at fair value on a recurring basis
Derivative financial instruments	112,208,000	42,846,000
Significant Unobservable Inputs (Level 3) | Recurring basis
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale	622,000	773,000
Derivative financial instruments	12,561,000	3,822,000
Significant Unobservable Inputs (Level 3) | Recurring basis | States and political subdivisions
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale	$ 417,000	417,000
Credit assumption (as a percent)	50.00%
Significant Unobservable Inputs (Level 3) | Recurring basis | Residential mortgage-backed securities
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale	$ 205,000	356,000
Significant Unobservable Inputs (Level 3) | Recurring basis | Mortgage servicing rights
Financial assets and financial liabilities measured at fair value on a recurring basis
Mortgage servicing rights	154,730,000	168,162,000
Significant Unobservable Inputs (Level 3) | Recurring basis | Derivative financial instruments
Financial assets and financial liabilities measured at fair value on a recurring basis
Derivative financial instruments	$ 12,561,000	$ 3,822,000
Significant Unobservable Inputs (Level 3) | Recurring basis | Minimum | Residential mortgage-backed securities
Financial assets and financial liabilities measured at fair value on a recurring basis
Constant prepayment rates (as a percent)	1.00%
Significant Unobservable Inputs (Level 3) | Recurring basis | Minimum | Mortgage servicing rights
Financial assets and financial liabilities measured at fair value on a recurring basis
Constant prepayment rates (as a percent)	12.30%
Discount rate	9.50%
Maturity (months)	327 months
Delinquencies	0.51%
Costs to service	$ 66
Costs to service - delinquent	$ 150
Significant Unobservable Inputs (Level 3) | Recurring basis | Minimum | Derivative financial instruments
Financial assets and financial liabilities measured at fair value on a recurring basis
Expected closing ratio	70.00%
Expected delivery price	0.9858%
Significant Unobservable Inputs (Level 3) | Recurring basis | Maximum | Residential mortgage-backed securities
Financial assets and financial liabilities measured at fair value on a recurring basis
Constant prepayment rates (as a percent)	3.00%
Significant Unobservable Inputs (Level 3) | Recurring basis | Maximum | Mortgage servicing rights
Financial assets and financial liabilities measured at fair value on a recurring basis
Constant prepayment rates (as a percent)	16.10%
Discount rate	12.00%
Maturity (months)	357 months
Delinquencies	3.86%
Costs to service	$ 160
Costs to service - delinquent	$ 1,000
Significant Unobservable Inputs (Level 3) | Recurring basis | Maximum | Derivative financial instruments
Financial assets and financial liabilities measured at fair value on a recurring basis
Expected closing ratio	95.00%
Expected delivery price	1.0977%

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Fair Value Measurements (Details 3) - Mortgage servicing rights	9 Months Ended
	Sep. 30, 2016 USD ($)
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]
Impact on fair value of 10% adverse change, CPR	$ (7,917,000)
Impact on fair value of 20% adverse change, CPR	(15,144,000)
Impact on fair value of 10% adverse change, discount rate	(5,045,000)
Impact on fair value of 20% adverse change, discount rate	(9,769,000)
Impact on fair value of 10% adverse change, delinquency rate	(1,329,000)
Impact on fair value of 20% adverse change, delinquency rate	(2,428,000)
Impact on fair value of 10% adverse change, costs to service	(2,988,000)
Impact on fair value of 20% adverse change, costs to service	$ (5,976,000)
Weighted average
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]
Weighted average CPR	15.30%
Weighted average discount rate	9.78%
Weighted average delinquency rate	1.80%
Weighted average costs to service	$ 88

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Fair Value Measurements (Details 4) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Financial assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Fair value assumption, allowance for impaired real estate loans percentage	100.00%
Investment Securities
Financial assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Balance, beginning of period	$ 773	$ 973
Purchases	0	0
Originations	0	0
Included in earnings	0	0
Principal payments	(151)	(115)
Sales	0	0
Balance, ending of period	622	858
Mortgage Servicing Rights
Financial assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Balance, beginning of period	168,162	235,402
Purchases	3,423	785
Originations	43,039	55,583
Included in earnings	(59,894)	(40,568)
Principal payments	0	0
Sales	0	(103,105)
Balance, ending of period	154,730	148,097
Derivatives
Financial assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Balance, beginning of period	3,822	5,074
Purchases	0	0
Originations	0	0
Included in earnings	8,739	3,088
Principal payments	0	0
Sales	0	0
Balance, ending of period	$ 12,561	$ 8,162

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Fair Value Measurements (Details 5) - Nonrecurring basis - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Financial Assets:
Impaired loans	$ 54,740	$ 76,203
Foreclosed assets	38,735	42,351
Significant Unobservable Inputs (Level 3)
Financial Assets:
Impaired loans	54,740	76,203
Foreclosed assets	$ 38,735	$ 42,351
Significant Unobservable Inputs (Level 3) | Minimum
Financial Assets:
Appraisal adjustment impaired loans (as a percent)	5.00%
Appraisal adjustment foreclosed assets (as a percent)	5.00%
Significant Unobservable Inputs (Level 3) | Maximum
Financial Assets:
Appraisal adjustment impaired loans (as a percent)	10.00%
Appraisal adjustment foreclosed assets (as a percent)	10.00%

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Fair Value Measurements (Details 6) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Maximum maturity period of short-term borrowings where carrying value approximates fair value (in days)	90 days
Minimum maturity period of short-term borrowings where fair value is based on discounted value of contractual cash flows (in days)	90 days
Financial Assets:
Cash and due from banks	$ 351,009	$ 307,869
Interest earning deposits with banks	125,250	73,572
Investment securities available for sale	1,859,356	1,585,023
Investment securities held to maturity	1,175,838	1,274,767
Non-marketable securities - FHLB and FRB stock	146,209	114,233
Loans held for sale	899,412	744,727
Derivative financial instruments	49,510	10,062
Financial Liabilities:
Non-interest bearing deposits	6,410,334	4,627,184
Interest bearing deposits	7,868,932	6,878,031
Short-term borrowings	1,496,319	1,005,737
Junior subordinated notes issued to capital trusts	209,159	186,164
Derivative financial instruments	68,515	34,338
Carrying Amount
Financial Assets:
Cash and due from banks	351,009	307,869
Interest earning deposits with banks	125,250	73,572
Investment securities available for sale	1,859,356	1,585,023
Investment securities held to maturity	1,115,262	1,230,810
Non-marketable securities - FHLB and FRB stock	146,209	114,233
Loans held for sale	899,412	744,727
Loans, net	12,401,168	9,665,858
Accrued interest receivable	58,541	53,457
Derivative financial instruments	112,208	42,846
Financial Liabilities:
Non-interest bearing deposits	6,410,334	4,627,184
Interest bearing deposits	7,868,932	6,878,031
Short-term borrowings	1,496,319	1,005,737
Long-term borrowings	311,645	400,274
Junior subordinated notes issued to capital trusts	209,159	186,164
Accrued interest payable	4,000	3,186
Derivative financial instruments	70,330	36,974
Estimated Fair Value
Financial Assets:
Cash and due from banks	351,009	307,869
Interest earning deposits with banks	125,250	73,572
Investment securities available for sale	1,859,356	1,585,023
Investment securities held to maturity	1,175,838	1,274,767
Non-marketable securities - FHLB and FRB stock	146,209	114,233
Loans held for sale	899,412	744,727
Loans, net	12,403,330	9,626,344
Accrued interest receivable	58,541	53,457
Derivative financial instruments	112,208	42,846
Financial Liabilities:
Non-interest bearing deposits	6,410,334	4,627,184
Interest bearing deposits	7,873,233	6,875,411
Short-term borrowings	1,496,312	1,005,705
Long-term borrowings	312,974	401,539
Junior subordinated notes issued to capital trusts	144,681	122,696
Accrued interest payable	4,000	3,186
Derivative financial instruments	70,330	36,974
Recurring basis
Financial Assets:
Loans held for sale	899,412	744,727
Financial Liabilities:
Derivative financial instruments	70,330	36,974
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial Assets:
Cash and due from banks	351,009	307,869
Interest earning deposits with banks	125,250	73,572
Investment securities available for sale	11,128	10,761
Investment securities held to maturity	0	0
Non-marketable securities - FHLB and FRB stock	0	0
Loans held for sale	0	0
Loans, net	0	0
Accrued interest receivable	58,541	53,457
Derivative financial instruments	1,347	5,118
Financial Liabilities:
Non-interest bearing deposits	6,410,334	4,627,184
Interest bearing deposits	0	0
Short-term borrowings	0	0
Long-term borrowings	0	0
Junior subordinated notes issued to capital trusts	0	0
Accrued interest payable	4,000	3,186
Derivative financial instruments	6,001	6,050
Recurring basis | Significant Other Observable Inputs (Level 2)
Financial Assets:
Cash and due from banks	0	0
Interest earning deposits with banks	0	0
Investment securities available for sale	1,847,606	1,573,489
Investment securities held to maturity	1,175,838	1,274,767
Non-marketable securities - FHLB and FRB stock	0	0
Loans held for sale	899,412	744,727
Loans, net	19,121	25,869
Accrued interest receivable	0	0
Derivative financial instruments	98,300	33,906
Financial Liabilities:
Non-interest bearing deposits	0	0
Interest bearing deposits	0	0
Short-term borrowings	0	0
Long-term borrowings	0	0
Junior subordinated notes issued to capital trusts	0	0
Accrued interest payable	0	0
Derivative financial instruments	64,329	30,924
Recurring basis | Significant Unobservable Inputs (Level 3)
Financial Assets:
Cash and due from banks	0	0
Interest earning deposits with banks	0	0
Investment securities available for sale	622	773
Investment securities held to maturity	0	0
Non-marketable securities - FHLB and FRB stock	146,209	114,233
Loans held for sale	0	0
Loans, net	12,384,209	9,600,475
Accrued interest receivable	0	0
Derivative financial instruments	12,561	3,822
Financial Liabilities:
Non-interest bearing deposits	0	0
Interest bearing deposits	7,873,233	6,875,411
Short-term borrowings	1,496,312	1,005,705
Long-term borrowings	312,974	401,539
Junior subordinated notes issued to capital trusts	144,681	122,696
Accrued interest payable	0	0
Derivative financial instruments	$ 0	$ 0

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Stock Incentive Plans (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Impact of the share-based payment plans in the financial statements
Total cost of share-based payment plans during the period	$ 4,238	$ 3,508	$ 12,573	$ 10,983
Amount of related income tax benefit recognized in income	$ 3,394	$ 1,367	$ 6,649	$ 4,288
Employee stock options
Number of Options
Outstanding, beginning balance (in shares)			2,192,431
Granted (in shares)			501,538
Exercised (in shares)			(461,405)
Expired (in shares)			(35,791)
Forfeited or cancelled (in shares)			(33,680)
Outstanding, ending balance (in shares)	2,163,093		2,163,093		2,192,431
Options exercisable (in shares)	1,423,442		1,423,442
Weighted Average Exercise Price
Outstanding, beginning balance (in dollars per share)			$ 27.77
Granted (in dollars per share)			28.86
Exercised (in dollars per share)			28.98
Expired (in dollars per share)			39.91
Forfeited or cancelled (in dollars per share)			31.06
Outstanding, ending balance (in dollars per share)	$ 27.51		27.51		$ 27.77
Options exercisable (in dollars per share)	$ 26.82		$ 26.82
Weighted Average Remaining Contractual Term (In Years)
Outstanding, beginning balance (in years)			5 years 3 months 5 days		4 years 5 months 10 days
Outstanding, ending balance (in years)			5 years 3 months 5 days		4 years 5 months 10 days
Options exercisable (in years)			3 years 6 months 10 days
Aggregate Intrinsic Value (in thousands)
Options outstanding	$ 22,903		$ 22,903
Options exercisable	$ 16,109		$ 16,109
Fair value assumptions
Risk-free interest rate			1.44%
Expected volatility of Company’s stock			28.17%
Expected dividend yield			2.21%
Expected life of options			5 years 6 months 20 days
Weighted average fair value per option of options granted during the year (in dollars per share)			$ 6.64
Restricted shares
Number of Shares and Units
Shares and units outstanding, beginning balance (in shares)			945,506
Granted (in shares)			482,739
Vested (in shares)			(405,633)
Forfeited or cancelled (in shares)			(23,824)
Shares and units outstanding, ending balance (in shares)	998,788		998,788		945,506
Weighted Average Grant Date Fair Value
Shares Outstanding, Beginning balance (in dollars per share)			$ 29.92
Granted (in dollars per share)			31.19
Vested (in dollars per share)			28.37
Forfeited or cancelled (in dollars per share)			29.95
Shares Outstanding, Ending balance (in dollars per share)	$ 31.17		$ 31.17		$ 29.92

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Stock Incentive Plans (Details 2) - USD ($) $ in Millions			9 Months Ended		12 Months Ended
	Aug. 18, 2014	May 28, 2014	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Stock-based compensation
Grants beyond threshold limit count numerator (in shares)			2
Omnibus Incentive Plan
Stock-based compensation
Additional number of share authorized (in shares)		3,100,000
Total number of shares authorized (in shares)		11,400,000
Percentage of shares authorized for issuance		10.00%
Vesting period		3 years
Shares available for future grant (in shares)			3,826,110
Unrecognized compensation cost related to nonvested share-based compensation			$ 25.4
Period for recognition			2 years 5 months
Omnibus Incentive Plan | Taylor Capital Group, Inc.
Stock-based compensation
Total number of shares authorized (in shares)	13,800,000
Increase in amount of shares authorized (in shares)	2,400,000
Employee stock options
Stock-based compensation
Award requisite service period			4 years
Expiration term of options			10 years
Intrinsic value of options exercised			$ 3.6	$ 1.3
Employee stock options | Director
Stock-based compensation
Vesting period			5 years
Maximum percentage of directors fees with option to be received in equity based incentive awards			70.00%
Period of restriction for sale of shares vested			6 months
Restricted shares
Stock-based compensation
Intrinsic value of restricted shares that vested			$ 15.7	$ 11.3
Restricted shares | Minimum
Stock-based compensation
Vesting period			2 years
Restricted shares | Maximum
Stock-based compensation
Vesting period			4 years
Restricted stock | Director
Stock-based compensation
Vesting period			1 year
Maximum percentage of directors fees with option to be received in equity based incentive awards			100.00%
Performance-based restricted stock units
Stock-based compensation
Vesting period			3 years
Restricted stock issued (in shares)			80,780		71,560	48,569	56,752
Percentage of shares earned to number of units issued			175.00%
Performance based restricted units performance period			3 years
Share based compensation restricted stock units multiplier			100.00%
Performance-based restricted stock units | Minimum
Stock-based compensation
Percentage of shares earned to number of units issued			0.00%
Performance-based restricted stock units | Maximum
Stock-based compensation
Percentage of shares earned to number of units issued			175.00%

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Derivative Financial Instruments (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended		12 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Derivative [Line Items]
Net amount payable under interest rate swap				$ 1		$ 1
Interest rate swap credit risk exposure		$ 45,800		45,800
Asset Derivatives, Notional Amount		4,234,276		4,234,276		3,389,146
Asset Derivatives, Estimated Fair Value		112,208		112,208		42,846
Liability Derivatives, Notional Amount		2,936,937		2,936,937		2,419,933
Liability Derivatives, Estimated Fair Value		(70,330)		(70,330)		(36,974)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Amounts of gain or (loss) recognized in income on derivatives		(1,487)	$ (749)	38,284	$ (508)
Stand-alone derivative instruments
Derivative [Line Items]
Asset Derivatives, Notional Amount	[1]	4,234,276		4,234,276		3,389,146
Asset Derivatives, Estimated Fair Value	[1]	112,208		112,208		42,846
Liability Derivatives, Notional Amount	[1]	2,936,818		2,936,818		2,419,779
Liability Derivatives, Estimated Fair Value	[1]	(70,325)		(70,325)		(36,965)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Amounts of gain or (loss) recognized in income on derivatives		(1,490)	(753)	38,281	(512)
Commercial loan interest rate swaps
Derivative [Line Items]
Liability Derivatives, Notional Amount		119		119
Interest rate swap contracts | Derivative instruments designated as hedges of fair value
Derivative [Line Items]
Asset Derivatives, Notional Amount	[2]	0		0		0
Asset Derivatives, Estimated Fair Value	[2]	0		0		0
Liability Derivatives, Notional Amount	[2]	119		119		154
Liability Derivatives, Estimated Fair Value	[2]	(5)		(5)		(9)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Amounts of gain or (loss) recognized in income on derivatives		3	4	3	4
Interest rate swap contracts | Stand-alone derivative instruments
Derivative [Line Items]
Asset Derivatives, Notional Amount	[1]	1,226,157		1,226,157		1,034,298
Asset Derivatives, Estimated Fair Value	[1]	49,520		49,520		27,856
Liability Derivatives, Notional Amount	[1]	1,226,157		1,226,157		1,025,186
Liability Derivatives, Estimated Fair Value	[1]	(49,520)		(49,520)		(27,899)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Amounts of gain or (loss) recognized in income on derivatives		5,296	8,614	5,260	8,623
Interest rate swap contracts | Stand-alone derivative instruments | Mortgage Banking
Derivative [Line Items]
Asset Derivatives, Notional Amount	[1]	1,332,000		1,332,000		898,000
Asset Derivatives, Estimated Fair Value	[1]	44,660		44,660		4,928
Liability Derivatives, Notional Amount	[1]	185,000		185,000		665,000
Liability Derivatives, Estimated Fair Value	[1]	(10,915)		(10,915)		(3,723)
Interest rate swaptions contracts | Stand-alone derivative instruments | Mortgage Banking
Derivative [Line Items]
Asset Derivatives, Notional Amount	[1]	0		0		0
Asset Derivatives, Estimated Fair Value	[1]	0		0		0
Liability Derivatives, Notional Amount	[1]	0		0		0
Liability Derivatives, Estimated Fair Value	[1]	0		0		0
Interest rate options contracts | Stand-alone derivative instruments
Derivative [Line Items]
Asset Derivatives, Notional Amount	[1]	219,409		219,409		222,585
Asset Derivatives, Estimated Fair Value	[1]	872		872		628
Liability Derivatives, Notional Amount	[1]	219,409		219,409		190,622
Liability Derivatives, Estimated Fair Value	[1]	(872)		(872)		(585)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Amounts of gain or (loss) recognized in income on derivatives		(36)	0	0	0
Foreign exchange contracts | Stand-alone derivative instruments
Derivative [Line Items]
Asset Derivatives, Notional Amount	[1]	49,550		49,550		72,529
Asset Derivatives, Estimated Fair Value	[1]	3,231		3,231		3,970
Liability Derivatives, Notional Amount	[1]	44,474		44,474		63,339
Liability Derivatives, Estimated Fair Value	[1]	(3,011)		(3,011)		(3,671)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Amounts of gain or (loss) recognized in income on derivatives		1,362	30	1,362	91
Spot foreign exchange contracts | Stand-alone derivative instruments
Derivative [Line Items]
Asset Derivatives, Notional Amount	[1]	742		742		328
Asset Derivatives, Estimated Fair Value	[1]	17		17		5
Liability Derivatives, Notional Amount	[1]	278		278		132
Liability Derivatives, Estimated Fair Value	[1]	(6)		(6)		0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Amounts of gain or (loss) recognized in income on derivatives		6	14	6	182
Treasury futures contracts | Stand-alone derivative instruments | Mortgage Banking
Derivative [Line Items]
Asset Derivatives, Notional Amount	[1]	86,500		86,500		0
Asset Derivatives, Estimated Fair Value	[1]	406		406		0
Liability Derivatives, Notional Amount	[1]	0		0		0
Liability Derivatives, Estimated Fair Value	[1]	0		0		0
TBA mortgage securities | Stand-alone derivative instruments | Mortgage Banking
Derivative [Line Items]
Asset Derivatives, Notional Amount	[1]	290,000		290,000		35,000
Asset Derivatives, Estimated Fair Value	[1]	856		856		33
Liability Derivatives, Notional Amount	[1]	0		0		0
Liability Derivatives, Estimated Fair Value	[1]	0		0		0
Forward loan sale commitments | Stand-alone derivative instruments | Mortgage Banking
Derivative [Line Items]
Asset Derivatives, Notional Amount	[1]	85,000		85,000		503,500
Asset Derivatives, Estimated Fair Value	[1]	85		85		1,604
Liability Derivatives, Notional Amount	[1]	1,261,500		1,261,500		475,500
Liability Derivatives, Estimated Fair Value	[1]	(6,001)		(6,001)		(1,087)
Interest rate lock commitments | Stand-alone derivative instruments | Mortgage Banking
Derivative [Line Items]
Asset Derivatives, Notional Amount	[1]	944,918		944,918		622,906
Asset Derivatives, Estimated Fair Value	[1]	12,561		12,561		3,822
Liability Derivatives, Notional Amount	[1]	0		0		0
Liability Derivatives, Estimated Fair Value	[1]	0		0		$ 0
Mortgage related derivatives | Stand-alone derivative instruments
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Amounts of gain or (loss) recognized in income on derivatives		$ (8,118)	$ (9,411)	$ 31,653	$ (9,408)

[1] These portfolio swaps are not designated as hedging instruments under ASC Topic 815.

[2] Derivative instruments designated to hedge fixed-rate commercial real estate loans.

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Derivative Financial Instruments (Details 2) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Derivative [Line Items]
Financial Assets, Gross Amount Recognized	$ 49,510	$ 10,062
Financial Assets, Gross Amount Offset	0	0
Financial Assets, Net Amount Recognized	49,510	10,062
Financial Liabilities, Gross Amount Recognized	68,515	34,338
Financial Liabilities, Gross Amount Offset	0	0
Financial Liabilities, Net Amount Recognized	68,515	34,338
Repurchase Agreements, Financial Assets, Gross Amount Recognized	0	0
Repurchase Agreements, Financial Assets, Gross Amount Offset	0	0
Repurchase Agreements, Financial Assets, Net Amount Recognized	0	0
Repurchase Agreements, Financial Liabilities, Gross Amount Recognized	256,569	201,207
Repurchase Agreements, Financial Liabilities, Gross Amount Offset	0	0
Repurchase Agreements, Financial Liabilities, Net Amount Recognized	256,569	201,207
Total Financial Assets, Gross Amount Recognized	49,510	10,062
Total Financial Assets, Gross Amount Offset	0	0
Total Financial Assets, Net Amount Recognized	49,510	10,062
Total Financial Liabilities, Gross Amount Recognized	325,084	235,545
Total Financial Liabilities, Gross Amount Offset	0	0
Total Financial Liabilities, Net Amount Recognized	325,084	235,545
Interest rate swap contracts, caps and floors
Derivative [Line Items]
Financial Assets, Gross Amount Recognized	652	5,698
Financial Assets, Gross Amount Offset	0	0
Financial Assets, Net Amount Recognized	652	5,698
Financial Liabilities, Gross Amount Recognized	50,047	31,446
Financial Liabilities, Gross Amount Offset	0	0
Financial Liabilities, Net Amount Recognized	50,047	31,446
Foreign exchange contracts
Derivative [Line Items]
Financial Assets, Gross Amount Recognized	2,850	2,728
Financial Assets, Gross Amount Offset	0	0
Financial Assets, Net Amount Recognized	2,850	2,728
Financial Liabilities, Gross Amount Recognized	1,551	1,805
Financial Liabilities, Gross Amount Offset	0	0
Financial Liabilities, Net Amount Recognized	1,551	1,805
Mortgage related derivatives
Derivative [Line Items]
Financial Assets, Gross Amount Recognized	46,008	1,636
Financial Assets, Gross Amount Offset	0	0
Financial Assets, Net Amount Recognized	46,008	1,636
Financial Liabilities, Gross Amount Recognized	16,917	1,087
Financial Liabilities, Gross Amount Offset	0	0
Financial Liabilities, Net Amount Recognized	$ 16,917	$ 1,087

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Derivative Financial Instruments (Details 3) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Derivative [Line Items]
Financial Assets, Net Amount Recognized	$ 49,510	$ 10,062
Financial Assets, Financial Instruments	(30,213)	(9,523)
Financial Assets, Collateral	0	0
Financial Assets, Net Amount	19,297	539
Financial Liabilities, Net Amount Recognized	68,515	34,338
Financial Liabilities, Financial Instruments	(30,213)	(9,523)
Financial Liabilities, Collateral	(38,279)	(24,649)
Financial Liabilities, Net Amount	23	166
Repurchase Agreements, Financial Assets, Net Amount Recognized	0	0
Repurchase Agreements, Financial Assets, Financial Instruments	0	0
Repurchase Agreements, Financial Assets, Collateral	0	0
Repurchase Agreements, Financial Assets, Net Amount	0	0
Repurchase Agreements, Financial Liabilities, Net Amount Recognized	256,569	201,207
Repurchase Agreements, Financial Liabilities, Financial Instruments	0	0
Repurchase Agreements, Financial Liabilities, Collateral	(256,569)	(201,207)
Repurchase Agreements, Financial Liabilities, Net Amount	0	0
Total Financial Assets, Net Amount Recognized	49,510	10,062
Total Financial Assets, Financial Instruments	(30,213)	(9,523)
Total Financial Assets, Collateral	0	0
Total Financial Assets, Net Amount	19,297	539
Total Financial Liabilities, Net Amount Recognized	325,084	235,545
Total Financial Liabilities, Financial Instruments	(30,213)	(9,523)
Total Financial Liabilities, Collateral	(294,848)	(225,856)
Total Financial Liabilities, Net Amount	23	166
Counterparty A
Derivative [Line Items]
Financial Assets, Net Amount Recognized	35,142	3,810
Financial Assets, Financial Instruments	(15,868)	(3,810)
Financial Assets, Collateral	0	0
Financial Assets, Net Amount	19,274	0
Financial Liabilities, Net Amount Recognized	15,868	11,137
Financial Liabilities, Financial Instruments	(15,868)	(3,810)
Financial Liabilities, Collateral	0	(7,327)
Financial Liabilities, Net Amount	0	0
Counterparty B
Derivative [Line Items]
Financial Assets, Net Amount Recognized	309	6
Financial Assets, Financial Instruments	(309)	(6)
Financial Assets, Collateral	0	0
Financial Assets, Net Amount	0	0
Financial Liabilities, Net Amount Recognized	11,098	7,808
Financial Liabilities, Financial Instruments	(309)	(6)
Financial Liabilities, Collateral	(10,789)	(7,802)
Financial Liabilities, Net Amount	0	0
Counterparty C
Derivative [Line Items]
Financial Assets, Net Amount Recognized	7,740	3,477
Financial Assets, Financial Instruments	(7,740)	(3,477)
Financial Assets, Collateral	0	0
Financial Assets, Net Amount	0	0
Financial Liabilities, Net Amount Recognized	17,344	4,963
Financial Liabilities, Financial Instruments	(7,740)	(3,477)
Financial Liabilities, Collateral	(9,604)	(1,486)
Financial Liabilities, Net Amount	0	0
Other counterparties
Derivative [Line Items]
Financial Assets, Net Amount Recognized	6,319	2,769
Financial Assets, Financial Instruments	(6,296)	(2,230)
Financial Assets, Collateral	0	0
Financial Assets, Net Amount	23	539
Financial Liabilities, Net Amount Recognized	24,205	10,430
Financial Liabilities, Financial Instruments	(6,296)	(2,230)
Financial Liabilities, Collateral	(17,886)	(8,034)
Financial Liabilities, Net Amount	$ 23	$ 166

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Operating Segments (Details) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2016 USD ($)		Sep. 30, 2015 USD ($)		Sep. 30, 2016 USD ($) segment	Sep. 30, 2015 USD ($)		Dec. 31, 2015 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments | segment					3
Number of segments | segment					3
Net interest income	$ 130,771		$ 115,969		$ 372,677	$ 343,837
Provision for credit losses	6,549		5,358		16,941	14,628
Non-interest income	108,387		82,251		282,080	246,468
Non-interest expense	170,385	[1]	134,266	[1]	454,091	406,923	[2]
Income tax expense	17,805		18,318		56,780	53,413
Net income	44,419		40,278		126,945	115,341
Total assets	19,341,882		14,950,101		19,341,882	14,950,101		$ 15,585,007
Taylor Capital Group, Inc.
Segment Reporting Information [Line Items]
Pretax merger related costs	11,400		389		17,200	9,600
Banking
Segment Reporting Information [Line Items]
Net interest income	119,685		104,714		341,445	313,192
Provision for credit losses	4,394		4,965		14,390	12,783
Non-interest income	40,533		31,572		112,221	94,197
Non-interest expense	117,211	[1]	88,276	[1]	307,733	271,248	[2]
Income tax expense	8,420		12,178		36,120	35,509
Net income	30,193		30,867		95,423	87,849
Total assets	16,453,379		12,759,341		16,453,379	12,759,341
Leasing
Segment Reporting Information [Line Items]
Net interest income	2,168		2,832		7,002	8,762
Provision for credit losses	1,964		242		2,045	1,598
Non-interest income	18,759		19,987		53,670	61,383
Non-interest expense	12,604	[1]	11,382	[1]	35,916	34,866	[2]
Income tax expense	2,484		4,398		8,872	13,218
Net income	3,875		6,797		13,839	20,463
Total assets	1,126,847		956,433		1,126,847	956,433
Mortgage Banking
Segment Reporting Information [Line Items]
Net interest income	8,918		8,423		24,230	21,883
Provision for credit losses	191		151		506	247
Non-interest income	49,095		30,692		116,189	90,888
Non-interest expense	40,570	[1]	34,608	[1]	110,442	100,809	[2]
Income tax expense	6,901		1,742		11,788	4,686
Net income	10,351		2,614		17,683	7,029
Total assets	$ 1,761,656		$ 1,234,327		$ 1,761,656	$ 1,234,327

[1] Includes merger related and repositioning expenses of $11.4 million and $389 thousand in the Banking Segment for the three months ended September 30, 2016 and 2015, respectively.

[2] Includes merger related and repositioning expenses of $17.2 million and $9.6 million in the Banking Segment for the nine months ended September 30, 2016 and 2015, respectively.

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Preferred Stock (Details)			9 Months Ended	12 Months Ended
	Aug. 24, 2016 $ / shares shares	Aug. 18, 2014 shares	Sep. 30, 2016 $ / shares shares	Dec. 31, 2015 $ / shares shares
Taylor Capital Merger
Business Acquisition [Line Items]
Stock conversion		1
Preferred stock, shares outstanding (in shares)		4,000,000
Preferred stock, dividend rate (percent)			8.00%
American Chartered Merger
Business Acquisition [Line Items]
Stock conversion	1
Preferred stock, dividend rate (percent)	8.00%
Series A Preferred Stock
Business Acquisition [Line Items]
Preferred stock, shares outstanding (in shares)			4,000,000	4,000,000
Preferred stock, liquidation preference per share (in dollars per share) | $ / shares			$ 25	$ 25
Preferred stock, dividend rate (percent)			8.00%	8.00%
Series A Preferred Stock | Taylor Capital Merger
Business Acquisition [Line Items]
Preferred stock, liquidation preference per share (in dollars per share) | $ / shares			$ 25
Series B Preferred Stock
Business Acquisition [Line Items]
Preferred stock, shares outstanding (in shares)			525	0
Preferred stock, dividend rate (percent)			8.00%
Series B Preferred Stock | American Chartered Merger
Business Acquisition [Line Items]
Preferred stock, shares outstanding (in shares)	525
Preferred stock, liquidation preference per share (in dollars per share) | $ / shares	$ 1,000