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, 2015

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 73,687,703 shares of the Registrant’s common stock as of November 4, 2015.

1

MB FINANCIAL, INC.

FORM 10-Q

September 30, 2015

INDEX

		Page
PART I.	FINANCIAL INFORMATION
Item 1.	Financial Statements	3
	Consolidated Balance Sheets	3
	Consolidated Statements of Operations	4
	Consolidated Statements of Comprehensive Income	6
	Consolidated Statements of Changes in Stockholders’ Equity	7
	Consolidated Statements of Cash Flows	8
	Notes to Consolidated Financial Statements	10
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	52
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	74
Item 4.	Controls and Procedures	76
PART II.	OTHER INFORMATION
Item 1.	Legal Proceedings	77
Item 1A.	Risk Factors	77
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	77
Item 6.	Exhibits	77
	Signatures	78

2

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, 2015			December 31, 2014
ASSETS
Cash and due from banks	$	234,220		$	256,804
Interest earning deposits with banks	66,025			55,277
Total cash and cash equivalents	300,245			312,081
Investment securities:
Securities available for sale, at fair value	1,551,238			1,654,752
Securities held to maturity, at amortized cost ($1,263,212 fair value at September 30, 2015 and $1,035,061 at December 31, 2014)	1,224,852			993,380
Non-marketable securities - FHLB and FRB stock	91,400			75,569
Total investment securities	2,867,490			2,723,701
Loans held for sale	676,020			737,209
Loans:
Total loans, excluding purchased credit impaired loans	9,233,488			8,831,572
Purchased credit impaired loans	155,693			251,645
Total loans	9,389,181			9,083,217
Less: Allowance for loan and lease losses	124,626			110,026
Net loans	9,264,555			8,973,191
Lease investments, net	184,223			162,833
Premises and equipment, net	234,115			238,377
Cash surrender value of life insurance	136,089			133,562
Goodwill	711,521			711,521
Other intangibles	37,520			38,006
Mortgage servicing rights, at fair value	148,097			235,402
Other real estate owned, net	29,587			19,198
Other real estate owned related to FDIC-assisted transactions	13,825			19,328
Other assets	346,814			297,690
Total assets	$	14,950,101		$	14,602,099
LIABILITIES AND STOCKHOLDERS’ EQUITY
LIABILITIES
Deposits:
Non-interest bearing	$	4,434,067		$	4,118,256
Interest bearing	6,820,511			6,872,686
Total deposits	11,254,578			10,990,942
Short-term borrowings	940,529			931,415
Long-term borrowings	95,175			82,916
Junior subordinated notes issued to capital trusts	186,068			185,778
Accrued expenses and other liabilities	410,523			382,762
Total liabilities	12,886,873			12,573,813
STOCKHOLDERS’ EQUITY
Preferred stock, ($0.01 par value, authorized 10,000,000 shares at September 30, 2015 and December 31, 2014; Series A, 8% perpetual non-cumulative, 4,000,000 shares issued and outstanding at September 30, 2015 and December 31, 2014, $25 liquidation value)	115,280			115,280
Common stock, ($0.01 par value; authorized 100,000,000 shares at September 30, 2015 and December 31, 2014; issued 75,565,174 shares at September 30, 2015 and 75,067,482 shares at December 31, 2014)	756			751
Additional paid-in capital	1,277,348			1,267,761
Retained earnings	702,789			629,677
Accumulated other comprehensive income	20,968			20,356
Less: 1,788,978 and 296,715 shares of treasury common stock, at cost, at September 30, 2015 and December 31, 2014, respectively	(55,258		)	(6,974		)
Controlling interest stockholders’ equity	2,061,883			2,026,851
Noncontrolling interest	1,345			1,435
Total stockholders’ equity	2,063,228			2,028,286
Total liabilities and stockholders’ equity	$	14,950,101		$	14,602,099

     See Accompanying Notes to Consolidated Financial Statements.

3

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,
	2015		2014			2015			2014
Interest income:
Loans:
Taxable	$	100,573	$	79,902		$	298,187		$	187,497
Nontaxable	2,283		2,265			6,716			6,819
Investment securities:
Taxable	9,655		11,028			29,591			27,968
Nontaxable	10,752		9,041			30,005			25,393
Federal funds sold	—		14			—			23
Other interest earning accounts	89		211			208			601
Total interest income	123,352		102,461			364,707			248,301
Interest expense:
Deposits	5,102		4,615			14,301			12,138
Short-term borrowings	395		231			1,027			426
Long-term borrowings and junior subordinated notes	1,886		2,003			5,542			4,725
Total interest expense	7,383		6,849			20,870			17,289
Net interest income	115,969		95,612			343,837			231,012
Provision for credit losses	5,358		3,109			14,628			2,309
Net interest income after provision for credit losses	110,611		92,503			329,209			228,703
Non-interest income:
Lease financing, net	20,000		17,719			60,644			45,768
Mortgage banking revenue	30,692		16,823			90,884			17,069
Commercial deposit and treasury management fees	11,472		9,345			33,572			23,595
Trust and asset management fees	6,002		5,712			17,468			16,324
Card fees	3,335		3,836			11,671			9,841
Capital markets and international banking fees	2,357		1,472			5,793			3,810
Consumer and other deposit service fees	3,499		3,362			9,842			9,453
Brokerage fees	1,281		1,145			4,502			3,826
Loan service fees	1,531		1,069			4,369			2,950
Increase in cash surrender value of life insurance	852		855			2,527			2,516
Net gain (loss) on investment securities	371		(3,246		)	(173		)	(3,016		)
Net gain (loss) on sale of assets	1		(7		)	(2		)	(24		)
Gain on extinguishment of debt	—		1,895			—			1,895
Other operating income	858		1,107			5,371			3,620
Total non-interest income	82,251		61,087			246,468			137,627
Non-interest expenses:
Salaries and employee benefits	87,891		79,492			258,822			170,491
Occupancy and equipment	12,458		11,742			37,575			30,852
Computer services and telecommunication	8,567		11,506			26,008			21,669
Advertising and marketing	2,578		2,235			7,521			6,537
Professional and legal	1,801		8,864			6,884			12,210
Other intangibles amortization	1,542		1,470			4,569			3,884
Branch exit and facilities impairment charges	70		—			7,899			—
Net loss recognized on other real estate owned and other related expenses	577		2,178			2,197			3,289
Prepayment fees on interest bearing liabilities	—		—			85			—
Other operating expenses	18,782		24,714			55,363			47,346
Total non-interest expenses	134,266		142,201			406,923			296,278
Income before income taxes	58,596		11,389			168,754			70,052
Income tax expense	18,318		4,488			53,413			20,076
Net income	40,278		6,901			115,341			49,976
Dividends on preferred shares	2,000		2,000			6,000			2,000
Net income available to common stockholders	$	38,278	$	4,901		$	109,341		$	47,976

4

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,
	2015		2014		2015		2014
Common share data:
Basic earnings per common share	$	0.52	$	0.08	$	1.47	$	0.83
Diluted earnings per common share	0.51		0.08		1.45		0.82
Weighted average common shares outstanding for basic earnings per common share	74,297,281		63,972,902		74,478,164		57,795,094
Diluted weighted average common shares outstanding for diluted earnings per common share	75,029,827		64,457,978		75,154,585		58,341,927

See Accompanying Notes to Consolidated Financial Statements.

5

MB FINANCIAL, INC. & SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Amounts in thousands) (Unaudited)

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Net income	$	40,278		$	6,901		$	115,341		$	49,976
Unrealized holding gains on investment securities, net of reclassification adjustments	4,989			5,589			3,507			16,089
Reclassification adjustment for amortization of unrealized gains on investment securities transferred to held to maturity from available for sale	(1,010		)	106			(2,669		)	(2,509		)
Reclassification adjustments for (gains) losses included in net income	(371		)	3,246			173			3,016
Other comprehensive income, before tax	3,608			8,941			1,011			16,596
Income tax benefit related to items of other comprehensive income	(1,418		)	(3,544		)	(399		)	(6,548		)
Other comprehensive income, net of tax	2,190			5,397			612			10,048
Comprehensive income	$	42,468		$	12,298		$	115,953		$	60,024

See Accompanying Notes to Consolidated Financial Statements.

6

MB FINANCIAL, INC. & SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY

Nine Months EndedSeptember 30, 2015 and 2014

(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, 2013	$	—	$	551	$	738,053		$	581,998		$	8,383	$	(3,747	)	$	1,444		$	1,326,682
Net income	—		—		—			49,976			—		—			220			50,196
Other comprehensive income, net of tax	—		—		—			—			10,048		—			—			10,048
Issuance of preferred stock	115,280		—		—			—			—		—			—			115,280
Issuance of common stock due to business combination	—		196		518,796			—			—		—			—			518,992
Cash dividends declared on preferred shares	—		—		—			(2,000		)	—		—			—			(2,000		)
Cash dividends declared on common shares ($0.38 per share)	—		—		—			(23,877		)	—		—			—			(23,877		)
Restricted common stock activity, net of tax	—		2		753			—			—		60			—			815
Stock option activity, net of tax	—		2		483			—			—		—			—			485
Repurchase of common shares in connection with employee benefit plans and held in trust for deferred compensation plan	—		—		372			—			—		(3,005		)	—			(2,633		)
Stock-based compensation expense	—		—		6,593			—			—		—			—			6,593
Distributions to noncontrolling interest	—		—		—			—			—		—			(213		)	(213		)
Balance at September 30, 2014	$	115,280	$	751	$	1,265,050		$	606,097		$	18,431	$	(6,692	)	$	1,451		$	2,000,368
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 loss, 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 noncontrolling 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

See Accompanying Notes to Consolidated Financial Statements.

7

MB FINANCIAL, INC. & SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

(Amounts in Thousands) (Unaudited)

	Nine Months Ended
	September 30,
	2015			2014
Cash Flows From Operating Activities
Net income	$	115,341		$	49,976
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of premises and equipment and leased equipment	45,550			42,645
Branch exit and facilities impairment charges	7,899			—
Compensation expense for share-based payment plans	10,983			6,593
Net loss (gain) on sales of premises and equipment and leased equipment	1,800			(1,612		)
Amortization of other intangibles	4,569			3,884
Provision for credit losses	14,628			2,309
Deferred income tax expense	13,521			22,192
Amortization of premiums and discounts on investment securities, net	35,441			33,661
Amortization of premiums and discounts on loans, net	(26,365		)	(8,350		)
Accretion of FDIC indemnification asset	(72		)	(92		)
Net loss on investment securities	173			3,016
Proceeds from sale of loans held for sale	5,500,778			873,877
Origination of loans held for sale	(5,450,842		)	(745,677		)
Net gain on sale of loans held for sale	(25,449		)	(7,285		)
Change in fair value of mortgage servicing rights	40,568			(7,517		)
Net loss on other real estate owned	2,070			1,674
Net (gain) loss on other real estate owned related to FDIC-assisted transactions	(296		)	473
Increase in cash surrender value of life insurance	(2,527		)	(2,516		)
(Increase) decrease in other assets, net	(120,160		)	77,888
Increase in other liabilities, net	(8,576		)	(46,942		)
Net cash provided by operating activities	159,034			298,197
Cash Flows From Investing Activities
Decrease in federal funds sold	—			42,950
Proceeds from sales of investment securities available for sale	28,356			463,306
Proceeds from maturities and calls of investment securities available for sale	206,378			195,219
Purchases of investment securities available for sale	(148,374		)	(204,274		)
Proceeds from maturities and calls of investment securities held to maturity	61,521			28,338
Purchases of investment securities held to maturity	(295,857		)	(116,973		)
Purchases of non-marketable securities - FHLB and FRB stock	(35,831		)	(15		)
Redemption of non-marketable securities - FHLB and FRB stock	20,000			26,483
Net (increase) decrease in loans	(248,219		)	248,886
Purchases of mortgage servicing rights	(785		)	(489		)
Proceeds from sale of mortgage servicing rights	103,105			—
Purchases of premises and equipment and leased equipment	(64,149		)	(46,865		)
Proceeds from sales of premises and equipment and leased equipment	3,993			7,499
Proceeds from sale of other real estate owned	3,153			8,390
Proceeds from sale of other real estate owned related to FDIC-assisted transactions	9,674			11,022
Net cash acquired in business acquisition	—			25,249
Net proceeds from FDIC related covered assets	(6,831		)	(189		)
Net cash (used in) provided by investing activities	(363,866		)	688,537
Cash Flows From Financing Activities
Net increase (decrease) in deposits	263,636			(95,924		)
Net increase (decrease) in short-term borrowings	9,114			(862,029		)
Proceeds from long-term borrowings	27,159			23,940
Principal paid on long-term borrowings	(14,900		)	(8,830		)
Redemption of junior subordinated notes issued to capital trusts	—			(45,369		)
Treasury stock transactions, net	(50,800		)	(2,633		)
Stock options exercised	499			902
Excess tax expense from share-based payment arrangements	241			316
Dividends paid on preferred stock	(6,000		)	—
Dividends paid on common stock	(35,953		)	(23,770		)
Net cash provided by (used in) financing activities	192,996			(1,013,397		)
Net increase in cash and cash equivalents	$	(11,836	)	$	(26,663	)
Cash and cash equivalents:
Beginning of period	312,081			473,459
End of period	$	300,245		$	446,796

8

MB FINANCIAL, INC. & SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS - (Continued)

(Amounts in Thousands) (Unaudited)

	Nine Months Ended
	September 30,
	2015			2014
Supplemental Disclosures of Cash Flow Information:
Cash payments for:
Interest paid to depositors and other borrowed funds	$	21,656		$	15,911
Income tax (refunds) payments, net	(4,958		)	17,300
Supplemental Schedule of Noncash Investing Activities:
Investment securities held to maturity purchased not settled	$	11,656		$	—
Transfer of investment securities held to maturity to investment securities available for sale	—			273,471
Loans held for sale transferred to loans held for investment	44,078			—
Loans transferred to other real estate owned	15,611			872
Loans transferred to other real estate owned related to FDIC-assisted transactions	3,221			13,179
Loans transferred to repossessed vehicles	777			609
Operating leases rewritten as direct finance leases included as loans	6,940			4,696
Supplemental Schedule of Noncash Investing Activities From Acquisitions:
Noncash assets acquired:
Investment securities available for sale	$	—		$	826,691
Investment securities held to maturity	—			22,599
Non-marketable securities - FHLB and FRB stock	—			50,620
Loans held for sale				670,671
Loans	—			3,532,211
Lease investments	—			11,885
Premises and equipment	—			19,701
Goodwill	—			288,152
Core deposit intangible	—			20,079
Mortgage servicing rights	—			224,453
Other real estate owned	—			4,720
Other assets	—			130,478
Total noncash assets acquired	$	—		$	5,802,260
Liabilities assumed:
Deposits	$	—		$	3,953,213
Short-term borrowings	—			1,035,800
Junior subordinated notes issued to capital trusts	—			80,843
Other liabilities	—			123,028
Total liabilities assumed	$	—		$	5,192,884

See Accompanying Notes to Consolidated Financial Statements.

9

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 position, results of operations and cash flows for the interim periods have been made. The results of operations for the three and nine months endedSeptember 30, 2015 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, 2014.

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 310 “Receivables.” New authoritative accounting guidance under ASC Topic 310, “Receivables” amended prior guidance to clarify that an in substance repossession or foreclosure occurs, and a creditor is considered to have received physical

possession of residential real estate property collateralizing a consumer mortgage loan, upon either (1) the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure or (2) the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. Additionally, the amendments require interim and annual disclosures. The Company adopted this new authoritative guidance on January 1, 2015, and it did not have an impact on the Company's statements of operations or financial condition.

New authoritative accounting guidance under ASC Topic 310, “Receivables” amended prior guidance to require an entity to derecognize a mortgage loan and recognize a separate other receivable upon foreclosure if (i) the loan has a government guarantee that is not separable from the loan before foreclosure, (ii) at the time of foreclosure, the creditor has the intent to convey the real estate property to the guarantor and make a claim on that guarantee, and the creditor has the ability to recover under that claim, and (iii) at the time of foreclosure, any amount of the claim that is determined on the basis of the fair value of the real estate is fixed. The separate other receivable is to be measured based on the amount of the loan balance (principal and interest) expected to be recovered from the guarantor. The Company adopted this new authoritative guidance on January 1, 2015, and it did not have a material impact on the Company's statements of operations or financial condition.

ASC Topic 323 “Investments - Equity Method and Joint Ventures.” New authoritative accounting guidance under ASC Topic 323, “Investments - Equity Method and Joint Ventures” amended prior guidance to permit entities to make an accounting policy election to account for their investments in qualified affordable housing projects using the proportional amortization method if certain conditions are met. Under the proportional amortization method, an entity amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits received and recognizes the net investment performance in the statement of operation as a component of income tax expense. The Company adopted this new authoritative guidance on January 1, 2015, and it did not have an impact on the Company's statements of operations or financial condition.

ASC Topics 205 “Presentation of Financial Statements” and 360 “Property, Plant, and Equipment.” New authoritative accounting guidance under ASC Topic 205, “Presentation of Financial Statements” and ASC Topic 360 “Property, Plant, and Equipment” amended prior guidance to change the requirements for reporting discontinued operations. The disposal of a component of an entity or group of components of an entity is required to be reported in discontinued operations if the disposal represents a strategic shift that has (or will have) a major effect on an entity's operations and financial results. The new authoritative guidance also

10

requires additional disclosures about discontinued operations. The Company adopted this new authoritative guidance on January 1, 2015, and it did not have an impact on the Company's statements of operations or financial condition.

ASC Topic 860 “Transfers and Servicing.” New authoritative accounting guidance under ASC Topic 860, “Transfers and Servicing” amended prior guidance to change the accounting for repurchase-to-maturity transactions to secured borrowing accounting and to require separate accounting for a transfer of a financial asset executed contemporaneously with a repurchase agreement with the same counterparty, which will result in secured borrowing accounting for the repurchase agreement. The new authoritative guidance also requires disclosures for a transfer of a financial asset accounted for as a sale and an agreement with the same transferee entered into in contemplation of the initial transfer that results in the transferor retaining substantially all of the exposure to the economic return on the transferred financial asset throughout the term of the transaction. In addition, it requires disclosures related to collateral, remaining contractual tenor and of the potential risks associated with repurchase agreements, securities lending transactions and repurchase-to-maturity transactions. The Company adopted this new authoritative guidance on January 1, 2015, and it did not have an impact on the Company's statements of operations or financial condition. The additional disclosures are included in Note 9. Short-Term Borrowings and Note 10. Long-Term Borrowings.

ASC Topic 718 “Compensation - Stock Compensation.” New authoritative accounting guidance under ASC Topic 718, “Compensation - Stock Compensation” amended prior guidance to require that a performance target that affects vesting and that could be achieved after the requisite service period be treated as a performance condition. The Company adopted this new authoritative guidance on January 1, 2015, 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. 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 225 “Income Statement - Extraordinary and Unusual Items.” New authoritative accounting guidance under ASC Topic 225, “Income Statement - Extraordinary and Unusual Items” amended prior guidance to eliminate the concept of extraordinary items. The new authoritative guidance will be effective for reporting periods after January 1, 2016 and is not expected to have a significant impact on the Company's statements of operations or financial condition.

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 new authoritative guidance will be effective for reporting periods after January 1, 2016 and is not expected to have a significant 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 new authoritative guidance will be effective for reporting periods after January 1, 2016 and is not expected to have a significant 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 income statement 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 acquisition date. The new authoritative guidance will be effective for reporting periods after January 1, 2016 and is not expected to have a significant 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,
	2015		2014			2015		2014
Distributed earnings allocated to common stock	$	12,733	$	10,545		$	36,227	$	23,877
Undistributed earnings	27,545		(3,644		)	79,114		26,099
Net income	40,278		6,901			115,341		49,976
Less: preferred stock dividends	2,000		2,000			6,000		2,000
Net income available to common stockholders	38,278		4,901			109,341		47,976
Less: earnings allocated to participating securities	2		—			5		1
Earnings allocated to common stockholders	$	38,276	$	4,901		$	109,336	$	47,975
Weighted average shares outstanding for basic earnings per common share	74,297,281		63,972,902			74,478,164		57,795,094
Dilutive effect of equity awards	732,546		485,076			676,421		546,833
Weighted average shares outstanding for diluted earnings per common share	75,029,827		64,457,978			75,154,585		58,341,927
Basic earnings per common share	$	0.52	$	0.08		$	1.47	$	0.83
Diluted earnings per common share	0.51		0.08			1.45		0.82

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Note 4.    Business Combination

On August 18, 2014, the Company acquired Taylor Capital Group, Inc. (“Taylor Capital”), a bank holding company and the parent company of Cole Taylor Bank, a commercial bank headquartered in Chicago, through the merger (the “Merger”) of Taylor Capital with and into the Company, followed immediately by the merger of Cole Taylor Bank with and into MB Financial Bank. This transaction solidified the Company's market position in Chicago and diversified its revenue streams. At the effective time of the Merger (the “Effective Time”), each share of the common stock of Taylor Capital and each share of nonvoting convertible preferred stock of Taylor Capital converted into the right to receive (1) 0.64318 of a share of the common stock of the Company, and (2) $4.08 in cash. All “in-the-money” Taylor Capital stock options and warrants outstanding immediately prior to the Effective Time were canceled in exchange for the right to receive a cash payment as provided in the merger agreement, as were the outstanding unvested restricted stock awards of Taylor Capital; however, the cash consideration payable for such restricted stock awards will remain subject to vesting or other lapse restrictions. Each share of Taylor Capital’s perpetual non-cumulative preferred stock, Series A, converted into the right to receive one share of the Company’s perpetual non-cumulative preferred stock, Series A.

The Company issued approximately 19.6 million shares of common stock and paid approximately $129.5 million in cash in the Merger. For the “in-the-money” Taylor Capital stock options and warrants, the Company paid in the aggregate approximately $4.4 million in cash. For the outstanding unvested Taylor Capital restricted stock awards, the Company will pay or has paid in the aggregate up to approximately $3.7 million in cash, as and to the extent such awards vest. The $129.5 million cash consideration includes payments for the Taylor Capital stock options, warrants and restricted stock awards.

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.  As the consideration paid for Taylor Capital exceeded the net assets acquired, goodwill of $288.2 million was recorded on the acquisition and was 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 have been determined to be final as of March 31, 2015.

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

	August 18,
	2014
ASSETS
Cash and cash equivalents	$	154,684
Investment securities available for sale	826,691
Investment securities held to maturity	22,599
Non-marketable securities - FRB and FHLB Stock	50,620
Loans held for sale	670,671
Loans	3,532,211
Leases investments	11,885
Premises and equipment	19,701
Goodwill	288,152
Core deposit intangible	20,079
Mortgage servicing rights	224,453
Other real estate owned	4,720
Other assets	130,478
Total assets	$	5,956,944
LIABILITIES
Deposits	$	3,953,213
Short-term borrowings	1,035,800
Junior subordinated notes issued to capital trusts	80,843
Accrued expenses and other liabilities	123,028
Total liabilities	$	5,192,884
Series A preferred stock at $28.82 per share at August 15, 2014	$	115,280
Total identifiable net assets less Series A preferred stock	$	648,780
Consideration excluding Series A preferred stock:
Market value of common stock at $26.49 per share at August 15, 2014 (19,602,482 shares of common stock issued)	$	519,270
Cash paid	129,510
Total fair value of consideration, excluding Series A preferred stock	$	648,780

The Company's Series A preferred stock was valued based upon the closing price of Taylor Capital's Series A preferred stock on August 15, 2014, the last trading day before the Merger date.

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 (computed on a loan by loan basis) and the principal outstanding is accreted over the remaining life of the loans. We anticipate recording a provision for the acquired portfolio in future quarters related to renewing Taylor Capital loans which will largely offset the accretion from the pass rated loans.

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In accordance with ASC 310-30, for both purchased non-impaired loans and purchased credit-impaired loans ("PCI 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 following table presents the acquired loans as of the acquisition date (in thousands):

	PCI Loans			Non-PCI Loans
Contractually required principal and interest payments	$	244,650		$	3,707,463
Contractually required interest payments not expected to be collected due to estimated prepayments	—			(302,329		)
Nonaccretable difference	(34,219		)	—
Cash flows expected to be collected	210,431			3,405,134
Accretable difference	(5,626		)	(77,728		)
Fair value of acquired loans	$	204,805		$	3,327,406

The Company recorded $9.6 million and $28.3 million in pre-tax merger related expenses for the nine months endedSeptember 30, 2015 and 2014, respectively. These merger related expenses primarily relate to retention and severance compensation costs, professional and legal fees and branch exit and facilities impairment charges. The data processing systems were converted in September 2014.

The following table provides the unaudited pro forma information for the results of operations for the three and nine months endedSeptember 30, 2014, as if the acquisition had occurred January 1, 2014. The pro forma results combine the historical results of Taylor Capital into the Company's consolidated statement of operations including the impact of certain purchase 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, 2014. 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. Net income in the table below includes merger related expenses.

	Pro Forma
	Three Months Ended		Nine Months Ended
	September 30, 2014		September 30, 2014
(in thousands)
Total revenues (net interest income plus non-interest income)	$	199,207	$	583,483
Net income	11,156		77,527

Revenues and earnings of the acquired company since the acquisition date have not been disclosed as it is not practicable as Taylor Capital 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, 2015
Available for Sale
U.S. Government sponsored agencies and enterprises	$	64,008	$	1,453	$	—		$	65,461
States and political subdivisions	379,015		20,289		(30		)	399,274
Residential mortgage-backed securities	683,955		10,379		(1,109		)	693,225
Commercial mortgage-backed securities	150,836		3,618		(253		)	154,201
Corporate bonds	228,711		1,843		(2,303		)	228,251
Equity securities	10,701		125		—			10,826
Total Available for Sale	1,517,226		37,707		(3,695		)	1,551,238
Held to Maturity
States and political subdivisions	1,002,963		30,098		(2,053		)	1,031,008
Residential mortgage-backed securities	221,889		10,315		—			232,204
Total Held to Maturity	1,224,852		40,413		(2,053		)	1,263,212
Total	$	2,742,078	$	78,120	$	(5,748	)	$	2,814,450
December 31, 2014
Available for Sale
U.S. Government sponsored agencies and enterprises	$	64,612	$	1,281	$	(20	)	$	65,873
States and political subdivisions	390,076		20,846		(68		)	410,854
Residential mortgage-backed securities	713,413		8,977		(1,827		)	720,563
Commercial mortgage-backed securities	186,110		1,772		(220		)	187,662
Corporate bonds	259,526		2,428		(2,751		)	259,203
Equity securities	10,531		66		—			10,597
Total Available for Sale	1,624,268		35,370		(4,886		)	1,654,752
Held to Maturity
States and political subdivisions	752,558		30,089		(382		)	782,265
Residential mortgage-backed securities	240,822		11,974		—			252,796
Total Held to Maturity	993,380		42,063		(382		)	1,035,061
Total	$	2,617,648	$	77,433	$	(5,268	)	$	2,689,813

The Company has no direct exposure to the State of Illinois, but approximately 22% of the state and political subdivisions portfolio consisted of securities issued by municipalities located in Illinois as of September 30, 2015. Approximately 95% of such securities were general obligation issues as of September 30, 2015.

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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, 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	$	8,600	$	(29	)	$	1,454	$	(1	)	$	10,054	$	(30	)
Residential mortgage-backed securities	125,856		(650		)	38,702		(459		)	164,558		(1,109		)
Commercial mortgage-backed securities	11,861		(253		)	—		—			11,861		(253		)
Corporate bonds	47,537		(328		)	9,025		(1,975		)	56,562		(2,303		)
Total Available for Sale	193,854		(1,260		)	49,181		(2,435		)	243,035		(3,695		)
Held to Maturity
States and political subdivisions	188,854		(1,890		)	6,731		(163		)	195,585		(2,053		)
Total	$	382,708	$	(3,150	)	$	55,912	$	(2,598	)	$	438,620	$	(5,748	)

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, 2014 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
U.S. Government sponsored agencies and enterprises	$	9,644	$	(20	)	$	—	$	—		$	9,644	$	(20	)
States and political subdivisions	7,784		(21		)	3,558		(47		)	11,342		(68		)
Residential mortgage-backed securities	235,818		(1,336		)	29,373		(491		)	265,191		(1,827		)
Commercial mortgage-backed securities	89,509		(220		)	—		—			89,509		(220		)
Corporate bonds	62,693		(1,159		)	9,675		(1,592		)	72,368		(2,751		)
Total Available for Sale	405,448		(2,756		)	42,606		(2,130		)	448,054		(4,886		)
Held to Maturity
States and political subdivisions	28,786		(130		)	14,238		(252		)	43,024		(382		)
Total	$	434,234	$	(2,886	)	$	56,844	$	(2,382	)	$	491,078	$	(5,268	)

The total number of security positions in the investment portfolio in an unrealized loss position at September 30, 2015 was 214 compared to 168 at December 31, 2014. This increase, as well as the increase in securities in a continuous unrealized loss position from December 31, 2014 to September 30, 2015, was mainly attributable to securities issued by states and political subdivisions 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, 2015, management does not have the intent to sell any of the securities in the table above 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, 2015, management believes the impairments detailed in the table above 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,
	2015		2014			2015			2014
Realized gains	$	371	$	921		$	1,454		$	1,246
Realized losses	—		(4,167		)	(1,627		)	(4,170		)
Impairment charges	—		—			—			(92		)
Net gains (losses)	$	371	$	(3,246	)	$	(173	)	$	(3,016	)

The amortized cost and fair value of investment securities as of September 30, 2015 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	$	19,082	$	19,156
Due after one year through five years	292,719		294,245
Due after five years through ten years	37,547		39,016
Due after ten years	322,386		340,569
Equity securities	10,701		10,826
Residential and commercial mortgage-backed securities	834,791		847,426
	1,517,226		1,551,238
Held to maturity:
Due in one year or less	72,969		73,139
Due after one year through five years	202,217		204,617
Due after five years through ten years	101,102		105,490
Due after ten years	626,675		647,762
Residential mortgage-backed securities	221,889		232,204
	1,224,852		1,263,212
Total	$	2,742,078	$	2,814,450

Investment securities with a carrying amount of $1.4 billion at September 30, 2015 and $1.5 billion at December 31, 2014 were pledged as collateral on public deposits and for other purposes as required or permitted by law, while only $1.1 billion and $980.4 million were required to be pledged at September 30, 2015 and December 31, 2014, respectively. Of those pledged, the Company had investment securities pledged as collateral for advances from the Federal Home Loan Bank of $111.1 million and $226.9 million at September 30, 2015 and December 31, 2014, respectively.

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Note 6. Loans

Loans consist of the following at (in thousands):

	September 30, 2015		December 31, 2014
Commercial loans	$	3,440,632	$	3,245,206
Commercial loans collateralized by assignment of lease payments	1,693,540		1,692,258
Commercial real estate	2,580,009		2,544,867
Residential real estate	607,171		503,287
Construction real estate	255,620		247,068
Indirect vehicle	345,731		268,840
Home equity	223,173		251,909
Other consumer loans	87,612		78,137
Total loans, excluding purchased credit-impaired loans	9,233,488		8,831,572
Purchased credit-impaired loans	155,693		251,645
Total loans	$	9,389,181	$	9,083,217

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 and asset-based 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 Company's Board of Directors' Enterprise Risk Committee on a regular basis.

Commercial Loans. Commercial credit is extended primarily to 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.

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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, powersports, recreational and marine 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 Company 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, 2015 and December 31, 2014, the Company had $3.5 billion and $2.0 billion, respectively, of loans pledged as collateral for long-term Federal Home Loan Bank advances and third party letters of credit, while only $1.8 billion and $1.3 billion were required to be pledged at September 30, 2015 and December 31, 2014, respectively.

20

The following table presents the contractual aging of the recorded investment in past due loans by class of loans as of September 30, 2015 and December 31, 2014 (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, 2015
Commercial	$	3,424,488	$	6,524	$	3,435	$	6,185	$	16,144	$	3,440,632
Commercial collateralized by assignment of lease payments	1,676,959		4,322		2,007		10,252		16,581		1,693,540
Commercial real estate
Healthcare	399,756		1,100		—		—		1,100		400,856
Industrial	368,596		—		—		793		793		369,389
Multifamily	383,603		874		1,542		1,371		3,787		387,390
Retail	423,888		1,379		4,161		1,774		7,314		431,202
Office	212,627		284		—		4,510		4,794		217,421
Other	767,781		3,294		1,429		1,247		5,970		773,751
Residential real estate	595,412		1,496		1,940		8,323		11,759		607,171
Construction real estate	255,620		—		—		—		—		255,620
Indirect vehicle	342,483		2,166		732		350		3,248		345,731
Home equity	213,828		1,584		1,918		5,843		9,345		223,173
Other consumer	87,233		191		120		68		379		87,612
Total loans, excluding purchased credit-impaired loans	9,152,274		23,214		17,284		40,716		81,214		9,233,488
Purchased credit-impaired loans	94,249		69		1,776		59,599		61,444		155,693
Total loans	$	9,246,523	$	23,283	$	19,060	$	100,315	$	142,658	$	9,389,181
Non-performing loan aging	$	50,258	$	3,981	$	1,734	$	40,604	$	46,319	$	96,577
December 31, 2014
Commercial	$	3,231,571	$	8,222	$	—	$	5,413	$	13,635	$	3,245,206
Commercial collateralized by assignment of lease payments	1,679,991		2,025		6,095		4,147		12,267		1,692,258
Commercial real estate
Healthcare	342,984		—		—		—		—		342,984
Industrial	333,907		944		—		3,182		4,126		338,033
Multifamily	417,504		1,377		—		1,517		2,894		420,398
Retail	432,718		2,481		652		2,325		5,458		438,176
Office	244,166		—		—		2,127		2,127		246,293
Other	754,031		307		2,421		2,224		4,952		758,983
Residential real estate	485,492		8,038		2,319		7,438		17,795		503,287
Construction real estate	246,731		—		—		337		337		247,068
Indirect vehicle	265,296		2,516		702		326		3,544		268,840
Home equity	242,756		2,717		1,039		5,397		9,153		251,909
Other consumer	78,106		16		12		3		31		78,137
Total loans, excluding purchased credit-impaired loans	8,755,253		28,643		13,240		34,436		76,319		8,831,572
Purchased credit-impaired loans	158,215		4,432		585		88,413		93,430		251,645
Total loans	$	8,913,468	$	33,075	$	13,825	$	122,849	$	169,749	$	9,083,217
Non-performing loan aging	$	46,149	$	5,764	$	1,099	$	34,075	$	40,938	$	87,087

21

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, 2015 and December 31, 2014 (in thousands):

	September 30, 2015				December 31, 2014
			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	$	22,639	$	—	$	14,088	$	—
Commercial collateralized by assignment of lease payments	8,113		3,713		2,404		3,566
Commercial real estate:
Healthcare	—		—		—		—
Industrial	1,216		—		6,371		—
Multifamily	4,029		—		5,333		—
Office	3,209		—		3,644		464
Retail	4,510		—		2,986		—
Other	12,383		90		13,541		324
Residential real estate	17,656		416		17,311		—
Construction real estate	—		—		337		—
Indirect vehicle	1,563		—		1,542		—
Home equity	16,940		—		15,171		—
Other consumer	44		56		5		—
Total	$	92,302	$	4,275	$	82,733	$	4,354

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.

22

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, 2015 and December 31, 2014 (in thousands):

	Pass		Special Mention		Substandard		Doubtful		Total
September 30, 2015
Commercial	$	3,160,263	$	167,652	$	112,717	$	—	$	3,440,632
Commercial collateralized by assignment of lease payments	1,681,021		3,098		9,421		—		1,693,540
Commercial real estate
Healthcare	396,511		4,345		—		—		400,856
Industrial	350,058		17,498		1,833		—		369,389
Multifamily	381,766		737		4,887		—		387,390
Retail	420,428		5,930		4,844		—		431,202
Office	198,930		9,520		8,971		—		217,421
Other	724,466		12,896		36,389		—		773,751
Construction real estate	255,620		—		—		—		255,620
Total	$	7,569,063	$	221,676	$	179,062	$	—	$	7,969,801
December 31, 2014
Commercial	$	3,036,069	$	178,984	$	30,153	$	—	$	3,245,206
Commercial collateralized by assignment of lease payments	1,680,736		6,853		4,669		—		1,692,258
Commercial real estate
Healthcare	338,622		4,362		—		—		342,984
Industrial	314,225		8,817		14,991		—		338,033
Multifamily	412,824		920		6,654		—		420,398
Retail	423,842		2,740		11,594		—		438,176
Office	229,947		8,524		7,822		—		246,293
Other	708,447		22,013		28,523		—		758,983
Construction real estate	246,204		527		337		—		247,068
Total	$	7,390,916	$	233,740	$	104,743	$	—	$	7,729,399

Approximately $56.1 million and $49.1 million of the substandard and doubtful loans were non-performing as of September 30, 2015 and December 31, 2014, 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, 2015 and December 31, 2014 (in thousands):

	Performing		Non-performing		Total
September 30, 2015
Residential real estate	$	589,099	$	18,072	$	607,171
Indirect vehicle	344,168		1,563		345,731
Home equity	206,233		16,940		223,173
Other consumer	87,512		100		87,612
Total	$	1,227,012	$	36,675	$	1,263,687
December 31, 2014
Residential real estate	$	485,976	$	17,311	$	503,287
Indirect vehicle	267,297		1,543		268,840
Home equity	236,739		15,170		251,909
Other consumer	78,132		5		78,137
Total	$	1,068,144	$	34,029	$	1,102,173

23

The following tables present loans individually evaluated for impairment by class of loans, excluding purchased credit-impaired loans, as of September 30, 2015 and December 31, 2014 (in thousands):

	September 30, 2015
									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	$	7,080	$	7,080	$	—	$	—	$	4,009	$	—	$	7,254	$	—
Commercial collateralized by assignment of lease payments	—		—		—		—		—		—		1,495		47
Commercial real estate:
Healthcare	—		—		—		—		—		—		—		—
Industrial	3,053		3,053		—		—		3,232		—		4,923		—
Multifamily	1,754		1,754		—		—		1,874		—		1,859		17
Retail	5,072		2,119		2,953		—		3,342		—		824		—
Office	2,379		1,802		577		—		2,396		—		1,318		—
Other	811		800		11		—		849		—		1,514		—
Residential real estate	970		970		—		—		949		—		482		—
Construction real estate	—		—		—		—		—		—		—		—
Indirect vehicle	—		—		—		—		—		—		—		—
Home equity	1,327		927		400		—		1,327		—		667		—
Other consumer	—		—		—		—		—		—		—		—
With an allowance recorded:
Commercial	29,245		29,245		—		7,943		30,590		—		9,500		—
Commercial collateralized by assignment of lease payments	7,208		6,724		484		2,618		6,982		18		3,728		94
Commercial real estate:
Healthcare	—		—		—		—		—		—		—		—
Industrial	820		793		27		22		839		—		33		—
Multifamily	1,037		1,037		—		78		1,148		—		4,856		27
Retail	4,790		4,790		—		1,326		4,046		—		7,433		—
Office	2,174		2,174		—		1,697		2,215		—		2,297		—
Other	11,032		11,032		—		—		12,007		—		13,265		—
Residential real estate	15,215		13,263		1,952		2,834		12,867		—		14,083		—
Construction real estate	—		—		—		—		—		—		431		—
Indirect vehicle	215		131		84		8		272		—		310		—
Home equity	30,896		28,593		2,303		2,478		28,380		—		27,299		—
Other consumer	—		—		—		—		—		—		—		—
Total	$	125,078	$	116,287	$	8,791	$	19,004	$	117,324	$	18	$	103,571	$	185

24

	December 31, 2014
									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	$	9,752	$	8,992	$	760	$	—	$	10,324	$	—
Commercial collateralized by assignment of lease payments	2,316		2,316		—		—		2,569		121
Commercial real estate:
Healthcare	—		—		—		—		—		—
Industrial	9,115		5,858		3,257		—		7,870		—
Multifamily	1,733		1,733		—		—		1,928		52
Retail	2,025		813		1,212		—		3,465		—
Office	—		—		—		—		1,127		—
Other	1,479		1,465		14		—		5,249		—
Residential real estate	1,941		1,941		—		—		2,740		—
Construction real estate	—		—		—		—		34		—
Indirect vehicle	—		—		—		—		—		—
Home equity	577		577		—		—		762		—
Other consumer	—		—		—		—		—		—
With an allowance recorded:
Commercial	7,987		7,987		—		2,395		14,227		—
Commercial collateralized by assignment of lease payments	715		715		—		105		1,515		91
Commercial real estate:
Healthcare	—		—		—		—		—		—
Industrial	517		513		4		130		4,982		—
Multifamily	5,680		4,709		971		996		6,354		131
Retail	9,264		7,897		1,367		720		8,547		—
Office	4,528		2,986		1,542		545		2,833		—
Other	12,612		12,527		85		136		11,022		12
Residential real estate	14,234		14,234		—		3,126		14,632		—
Construction real estate	2,707		337		2,370		162		455		—
Indirect vehicle	227		227		—		14		358		—
Home equity	25,927		25,705		222		2,153		25,672		—
Other consumer	—		—		—		—		—		—
Total	$	113,336	$	101,532	$	11,804	$	10,482	$	126,665	$	407

Impaired loans included accruing restructured loans of $20.1 million and $15.6 million that have been modified and are performing in accordance with those modified terms as of September 30, 2015 and December 31, 2014, respectively.  In addition, impaired loans included $21.4 million and $25.8 million of non-performing restructured loans as of September 30, 2015 and December 31, 2014, 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.

25

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, 2015 and December 31, 2014, there was one A/B structure with a recorded investment of $1.0 million, 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, 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

The following table presents loans that were restructured during the three months ended September 30, 2014 (dollars in thousands):

	September 30, 2014
	Number of Loans	Pre-Modification Recorded Investment		Post-Modification Recorded Investment		Charge-offs and Specific Reserves
Non-Performing:
Residential real estate	2	$	411	$	411	$	246
Indirect vehicle	15	95		95		38
Home equity	6	604		604		104
Total	23	$	1,110	$	1,110	$	388

The following table presents loans that were restructured during the nine months endedSeptember 30, 2014 (dollars in thousands):

	September 30, 2014
	Number of Loans	Pre-Modification Recorded Investment		Post-Modification Recorded Investment		Charge-offs and Specific Reserves
Performing:
Indirect vehicle	1	$	5	$	5	$	—
Home equity	6	1,883		1,883		—
Total	7	$	1,888	$	1,888	$	—
Non-Performing:
Commercial	1	$	263	$	263	$	85
Commercial real estate:
Multifamily	1	158		158		40
Residential real estate	6	1,850		1,850		246
Indirect vehicle	44	262		262		65
Home equity	13	1,667		1,667		104
Total	65	$	4,200	$	4,200	$	540

Of the troubled debt restructurings entered into during the past twelve months, $224 thousand subsequently defaulted during the nine months endedSeptember 30, 2015.  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, 2015 (in thousands):

	Performing			Non-performing
Beginning balance	$	15,603		$	25,771
Additions	4,370			1,897
Charge-offs	—			(244		)
Principal payments, net	(281		)	(631		)
Removals	(3,417		)	(1,113		)
Transfer to other real estate owned	—			(482		)
Transfers in	4,034			189
Transfers out	(189		)	(4,034		)
Ending balance	$	20,120		$	21,353

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.

27

The following table presents the type of modification for loans that have been restructured during the nine months endedSeptember 30, 2015 (in thousands):

	September 30, 2015
	Extended
	Maturity,				Delay in
	Amortization		Extended		Payments or
	and Reduction		Maturity and/or		Reduction of
	of Interest Rate		Amortization		Interest Rate		Total
Commercial	$	—	$	—	$	80	$	80
Commercial real estate:
Multifamily	—		334		—		334
Residential real estate	140		—		—		140
Indirect vehicle	—		—		75		75
Home equity	2,541		267		2,830		5,638
Total	$	2,681	$	601	$	2,985	$	6,267

28

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, 2015 and 2014 (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, 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

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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, 2014
Allowance for credit losses:
Three Months Ended
Beginning balance	$	23,154	$	9,425		$	43,933		$	7,495		$	4,613		$	1,727	$	8,281	$	2,282		$	2,995		$	103,905
Allowance for unfunded credit commitments acquired through business combination	—		—			—			—			—			—		—		—			1,261			1,261
Utilization of allowance for unfunded credit commitments	—		—			—			—			—			—		—		—			(637		)	(637		)
Charge-offs	606		—			1,027			740			5			1,043		566		497			—			4,484
Recoveries	564		425			2,227			4			25			402		46		65			—			3,758
Provision	2,181		(484		)	(4,193		)	534			2,174			643		1,836		(65		)	483			3,109
Ending balance	$	25,293	$	9,366		$	40,940		$	7,293		$	6,807		$	1,729	$	9,597	$	1,785		$	4,102		$	106,912
Nine Months Ended
Beginning balance	$	23,461	$	9,159		$	51,628		$	8,872		$	6,856		$	1,662	$	8,478	$	1,630		$	1,716		$	113,462
Allowance for unfunded credit commitments acquired through business combination	—		—			—			—			—			—		—		—			1,261			1,261
Utilization of allowance for unfunded credit commitments	—		—			—			—			—			—		—		—			(637		)	(637		)
Charge-offs	1,142		40			9,910			1,438			75			2,546		2,002		1,582			—			18,735
Recoveries	2,888		555			3,279			529			201			1,283		306		211			—			9,252
Provision	86		(308		)	(4,057		)	(670		)	(175		)	1,330		2,815		1,526			1,762			2,309
Ending balance	$	25,293	$	9,366		$	40,940		$	7,293		$	6,807		$	1,729	$	9,597	$	1,785		$	4,102		$	106,912
Ending allowance balance attributable to loans:
Individually evaluated for impairment	$	2,250	$	238		$	3,153		$	3,196		$	161		$	27	$	1,690	$	—		$	1,316		$	12,031
Collectively evaluated for impairment	22,433		9,128			37,156			4,097			6,641			1,702		7,907		1,785			2,786			93,635
Acquired and accounted for under ASC 310-30 (1)	610		—			631			—			5			—		—		—			—			1,246
Total ending allowance balance	$	25,293	$	9,366		$	40,940		$	7,293		$	6,807		$	1,729	$	9,597	$	1,785		$	4,102		$	106,912
Loans:
Individually evaluated for impairment	$	18,850	$	6,211		$	49,077		$	15,811		$	337		$	212	$	25,562	$	—		$	—		$	116,060
Collectively evaluated for impairment	3,045,819		1,625,449			2,598,335			501,023			221,783			272,826		237,415		69,028			—			8,571,678
Acquired and accounted for under ASC 310-30 (1)	121,565		—			110,004			3,389			30,330			—		115		22,783			—			288,186
Total ending loans balance	$	3,186,234	$	1,631,660		$	2,757,416		$	520,223		$	252,450		$	273,038	$	263,092	$	91,811		$	—		$	8,975,924

⁽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.

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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. We anticipate recording a provision for the acquired portfolio in future quarters related to renewing Taylor loans which will largely offset the accretion from the pass rated 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, 2015, there was a negative provision for credit losses of $2.2 million and net recoveries of $2.7 million, in relation to 16 pools of purchased loans with a total carrying amount of $44.4 million as of September 30, 2015. There was $1.8 million and $1.3 million in allowance for loan and lease losses related to these purchased loans at September 30, 2015 and December 31, 2014, 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 nine months endedSeptember 30, 2015 and 2014 (in thousands):

	Three Months Ended					Nine Months Ended
	September 30,					September 30,
	2015			2014		2015			2014
Balance at beginning of period	$	11,456		$	1,218	$	7,434		$	2,337
Purchases	—			5,626		—			5,626
Accretion	(1,794		)	2,076		(5,541		)	383
Other (1)	590			931		8,359			1,505
Balance at end of period	$	10,252		$	9,851	$	10,252		$	9,851

⁽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.

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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, 2015	Purchased Credit-Impaired Loans		Purchased Non-Credit-Impaired Loans		Total
Covered loans:
Consumer related	$	18,959	$	—	$	18,959
Non-covered loans:
Commercial loans	37,189		796,449		833,638
Commercial loans collateralized by assignment of lease payments	—		100,708		100,708
Commercial real estate	47,803		715,026		762,829
Construction real estate	12,372		53,540		65,912
Consumer related	39,370		192,210		231,580
Total non-covered loans	136,734		1,857,933		1,994,667
Total acquired	$	155,693	$	1,857,933	$	2,013,626

Outstanding balances on purchased loans from the FDIC were $60.0 million and $95.1 million as of September 30, 2015 and December 31, 2014, respectively.  The related carrying amount on loans purchased from the FDIC was $62.2 million and $91.4 million as of September 30, 2015 and December 31, 2014, respectively.

Effective April 1, 2014, the losses on commercial related loans (commercial, commercial real estate and construction real estate) acquired in connection with the Heritage FDIC-assisted transaction ceased being covered under the loss-share agreement for that transaction. The carrying amount of those loans was $2.3 million as of September 30, 2015. 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 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 $1.5 million as of September 30, 2015. 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 and New Century FDIC-assisted transactions ceased to be covered under the loss-share agreements for those transactions. The carrying amount of those loans was $21.1 million as of September 30, 2015. 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 agreements through June 30, 2020.

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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, 2015 or 2014.   The carrying amount of goodwill was $711.5 million at September 30, 2015 and December 31, 2014.

The Company has other intangible assets consisting of core deposit and client relationship intangibles that had a remaining weighted average amortization period of approximately 6 years as of September 30, 2015. Core deposit and client relationship intangibles increased by $4.1 million due to the acquisition of the Illinois court-appointed guardianship and special needs trust business of JPMorgan Chase in August 2015.

The following table presents the changes during the nine months ended September 30, 2015 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, 2015 (in thousands):

	September 30, 2015
Balance at beginning of period	$	38,006
Amortization expense	(4,569		)
Other intangibles from acquisition	4,083
Balance at end of period	$	37,520
Gross carrying amount	$	84,454
Accumulated amortization	(46,934		)
Net book value	$	37,520

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

Year ending December 31,	Amount
2015	$	1,546
2016	5,523
2017	4,943
2018	4,526
2019	3,040
Thereafter	17,942
	$	37,520

Note 8. Deposits

The composition of deposits was as follows (in thousands):

	September 30,		December 31,
	2015		2014
Demand deposit accounts, noninterest bearing	$	4,434,067	$	4,118,256
NOW and money market accounts	4,129,414		3,913,765
Savings accounts	953,746		940,345
Certificates of deposit, $250,000 or more	811,850		838,928
Other certificates of deposit	925,501		1,179,648
Total	$	11,254,578	$	10,990,942

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Certificates of deposit of $250,000 or more included $444.9 million and $485.3 million of brokered deposits at September 30, 2015 and December 31, 2014, 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, 2015 and December 31, 2014 (dollars in thousands):

	September 30, 2015				December 31, 2014
	Weighted Average Interest Rate		Amount		Weighted Average Interest Rate		Amount
Customer repurchase agreements	0.19	%	$	262,009	0.21	%	$	219,824
Federal Home Loan Bank advances	0.17		675,000		0.13		700,000
Federal funds purchased	0.10		3,520		0.14		11,591
Total	0.18	%	$	940,529	0.15	%	$	931,415

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 $675.0 million and $700.0 million at September 30, 2015 and December 31, 2014, respectively. At September 30, 2015, the interest rate on the advances outstanding on that date had rates ranging from 0.13% to 0.23% with maturities from October 1, 2015 to December 11, 2015. 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 March 9, 2012, the Company entered into a $35.0 million unsecured line of credit with a correspondent bank. Interest is payable at a rate of one month LIBOR + 1.85%. The line of credit matured on September 7, 2015.

Note 10. Long-Term Borrowings

The Company had Federal Home Loan Bank advances with remaining contractual maturities greater than one year of $5.3 million at September 30, 2015 and $4.2 million at December 31, 2014. As of September 30, 2015, the advances had fixed terms with effective interest rates, net of discounts, ranging from 3.23% to 5.87% and maturities ranging from April 2021 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 $49.8 million and $38.5 million at September 30, 2015 and December 31, 2014, respectively, which as of September 30, 2015, were accruing interest at rates ranging from 2.25% to 12.00%, with a weighted average rate of 4.34%.  Lease investments includes equipment with an amortized cost of $59.5 million and $48.8 million at September 30, 2015 and December 31, 2014, respectively, that is pledged as collateral on these notes.

The Company had a $40.0 million10-year structured repurchase agreement as of September 30, 2015 and December 31, 2014, which bears interest at a fixed rate borrowing of 4.75% and expires in March 2016. The Company pledges mortgage-backed securities as collateral for the repurchase agreement and may be required to provide additional collateral based on the fair value of those securities.

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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 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, 2015 (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

(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 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 $7.2 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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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, 2015 and December 31, 2014, the following financial instruments were outstanding, the contractual amounts of which represent off-balance sheet credit risk (in thousands):

	Contractual Amount
	September 30, 2015		December 31, 2014
Commitments to extend credit:
Home equity lines	$	194,644	$	221,102
Other commitments	3,028,042		2,643,220
Letters of credit:
Standby	132,277		131,810
Commercial	1,747		2,401

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, 2015, 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, 2015, 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, decreased$187 thousand to $134.0 million from $134.2 million at December 31, 2014.  Of the $134.0 million in commitments outstanding at September 30, 2015, approximately $83.8 million of the letters of credit have been issued or renewed since December 31, 2014.

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, 2015, the Company had approximately $4.1 million in capital expenditure commitments outstanding which relate to various projects to renovate existing 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, 2015, approximately 22% 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, 2015. The distribution of commitments to extend credit approximates the distribution of loans outstanding.  Standby letters of credit are granted primarily to commercial borrowers. Our asset-based loans are made to borrowers

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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.

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 shall not be 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.

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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, the Company uses an external valuation model that relies on internally developed inputs to estimate the fair value of its interest rate lock commitments which is based on unobservable inputs that reflect management’s assumptions and specific information about each borrower transaction and is classified in Level 3 of the hierarchy.

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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, 2015 and December 31, 2014, 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, 2015
Financial assets
Securities available for sale:
U.S Government sponsored agencies and enterprises	$	65,461	$	—	$	65,461	$	—
States and political subdivisions	399,274		—		398,811		463
Residential mortgage-backed securities	693,225		—		692,830		395
Commercial mortgage-backed securities	154,201		—		154,201		—
Corporate bonds	228,251		—		228,251		—
Equity securities	10,826		10,826		—		—
Loans held for sale	676,020		—		676,020		—
Loans	27,176		—		27,176		—
Mortgage servicing rights	148,097		—		—		148,097
Assets held in trust for deferred compensation	16,022		16,022		—		—
Derivative financial instruments	66,410		11,955		46,293		8,162
Financial liabilities
Other liabilities (1)	15,513		15,513		—		—
Derivative financial instruments	53,618		15,029		38,589		—
December 31, 2014
Financial assets
Securities available for sale:
U.S. Government sponsored agencies and enterprises	$	65,873	$	—	$	65,873	$	—
States and political subdivisions	410,854		—		410,391		463
Residential mortgage-backed securities	720,563		—		720,053		510
Commercial mortgage-backed securities	187,662		—		187,662		—
Corporate bonds	259,203		—		259,203		—
Equity securities	10,597		10,597		—		—
Loans held for sale	737,209		—		737,209		—
Mortgage servicing rights	235,402		—		—		235,402
Assets held in trust for deferred compensation	16,829		16,829		—		—
Derivative financial instruments	46,388		1,607		39,707		5,074
Financial liabilities
Other liabilities (1)	16,483		16,483		—		—
Derivative financial instruments	40,499		7,209		33,290		—

⁽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, 2015		Valuation Technique	Unobservable Input	Range
	(in thousands)
States and political subdivisions	$	463	Discounted cash flows	Credit assumption	45% Loss
Residential mortgage-backed securities	395		Discounted cash flows	Constant pre-payment rates (CPR)	1% - 3%
Mortgage servicing rights	148,097		Discounted cash flows	CPR	9.9% - 16.2%
				Discount rate	9.25 - 12.00
				Maturity (months)	327 - 357
				Delinquencies	0.51 - 3.80
				Costs to service	$ 60 - $ 160
				Costs to service - delinquent	$ 150 - $ 1,000
Derivative financial instruments (mortgage	8,162		Sales cash flows	Expected closing ratio	60% - 95%
interest rate lock commitments)				Expected delivery price	100.21 bps - 108.95 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, 2015 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, 2015
Weighted average CPR	13.60		%
Impact on fair value of 10% adverse change	$	(6,402	)
Impact on fair value of 20% adverse change	(12,278		)
Weighted average discount rate	9.56		%
Impact on fair value of 10% adverse change	$	(4,917	)
Impact on fair value of 20% adverse change	(9,521		)
Weighted average delinquency rate	1.84		%
Impact on fair value of 10% adverse change	$	(811	)
Impact on fair value of 20% adverse change	(1,772		)
Weighted average costs to service	$	81
Impact on fair value of 10% adverse change	(2,563		)
Impact on fair value of 20% adverse change	(5,126		)

The Company did not have any transfers between Level 1 and Level 2 of the fair value hierarchy during the nine months endedSeptember 30, 2015. 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,
	2015			2014			2015			2014		2015		2014
(in thousands)	Investment Securities						Mortgage Servicing Rights					Derivatives
Balance, beginning of period	$	973		$	5,856		$	235,402		$	—	$	5,074	$	—
Acquired through business combination	—			507			—			232,783		—		5,922
Purchases	—			—			785			489		—		—
Originations	—			—			55,583			8,587		—		—
Other comprehensive income	—			(71		)	—			7,517		—		(2,395		)
Included in earnings	—			—			(40,568		)	—		3,088		—
Principal payments	(115		)	(281		)	—			—		—		—
Impairment charge	—			(92		)	—			—		—		—
Sales	—			(4,565		)	(103,105		)	—		—		—
Balance, ending of period	$	858		$	1,354		$	148,097		$	249,376	$	8,162	$	3,527

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 (96% at September 30, 2015), 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, 2015 and December 31, 2014 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, 2015
Financial assets:
Impaired loans	$	82,275	$	—	$	—	$	82,275
Non-financial assets:
Foreclosed assets	43,628		—		—		43,628
December 31, 2014
Financial assets:
Impaired loans	$	61,717	$	—	$	—	$	61,717
Non-financial assets:
Foreclosed assets	38,619		—		—		38,619

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, 2015		Technique	Input	Range
	(in thousands)
Impaired loans	$	82,275	Appraisal of collateral	Appraisal adjustments - sales costs	5% - 10%
Foreclosed assets	43,628		Appraisal of collateral	Appraisal adjustments - sales costs	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.

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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 amount 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, 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	$	234,220	$	234,220	$	234,220	$	—	$	—
Interest earning deposits with banks	66,025		66,025		66,025		—		—
Federal funds sold	—		—		—		—		—
Investment securities available for sale	1,551,238		1,551,238		10,826		1,539,554		858
Investment securities held to maturity	1,224,852		1,263,212		—		1,263,212		—
Non-marketable securities - FHLB and FRB stock	91,400		91,400		—		—		91,400
Loans held for sale	676,020		676,020		—		676,020		—
Loans, net	9,264,555		9,285,678		—		27,176		9,258,502
Accrued interest receivable	51,195		51,195		51,195		—		—
Derivative financial instruments	66,410		66,410		11,955		46,293		8,162
Financial Liabilities:
Noninterest bearing deposits	$	4,434,067	$	4,434,067	$	4,434,067	$	—	$	—
Interest bearing deposits	6,820,511		6,825,784		—		—		6,825,784
Short-term borrowings	940,529		940,532		—		—		940,532
Long-term borrowings	95,175		97,252		—		—		97,252
Junior subordinated notes issued to capital trusts	186,068		115,618		—		—		115,618
Accrued interest payable	2,923		2,923		2,923		—		—
Derivative financial instruments	53,618		53,618		15,029		38,589		—

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	December 31, 2014
	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	$	256,804	$	256,804	$	256,804	$	—	$	—
Interest earning deposits with banks	55,277		55,277		55,277		—		—
Investment securities available for sale	1,654,752		1,654,752		10,597		1,643,182		973
Investment securities held to maturity	993,380		1,035,061		—		1,035,061		—
Non-marketable securities - FHLB and FRB stock	75,569		75,569		—		—		75,569
Loans held for sale	737,209		737,209		—		737,209		—
Loans, net	8,973,191		8,956,494		—		—		8,956,494
Accrued interest receivable	49,065		49,065		49,065		—		—
Derivative financial instruments	46,388		46,388		1,607		39,707		5,074
Financial Liabilities:
Non-interest bearing deposits	$	4,118,256	$	4,118,256	$	4,118,256	$	—	$	—
Interest bearing deposits	6,872,686		6,877,349		—		—		6,877,349
Short-term borrowings	931,415		931,415		—		—		931,415
Long-term borrowings	82,916		86,025		—		—		86,025
Junior subordinated notes issued to capital trusts	185,778		122,408		—		—		122,408
Accrued interest payable	3,709		3,709		3,709		—		—
Derivative financial instruments	40,499		40,499		7,209		33,290		—

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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,
	2015		2014		2015		2014
Total cost of share-based payment plans during the period	$	3,508	$	2,338	$	10,983	$	6,593
Amount of related income tax benefit recognized in income	1,367		922		4,288		$	2,592

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, 2015, there were 5,086,333 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 stock options outstanding for the nine months endedSeptember 30, 2015:

	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, 2014	2,250,714		$	27.94	4.39
Granted	322,899		31.45
Exercised	(122,584	)	22.03
Expired or cancelled	(173,977	)	41.12
Forfeited	(11,671	)	26.77
Options outstanding as of September 30, 2015	2,265,381		$	27.75	4.66	$	12,467
Options exercisable as of September 30, 2015	1,735,603		$	27.25	3.42	$	10,740

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, 2015:

	September 30, 2015
Risk-free interest rate	1.68		%
Expected volatility of Company’s stock	29.76		%
Expected dividend yield	1.81		%
Expected life of options	5.8 years
Weighted average fair value per option of options granted during the year	$	7.84

The total intrinsic value of options exercised during the nine months endedSeptember 30, 2015 and 2014 was $1.3 million and $1.6 million, respectively.

The following is a summary of changes in restricted shares and units for the nine months endedSeptember 30, 2015:

	Number of Shares and Units		Weighted Average Grant Date Fair Value
Shares Outstanding at December 31, 2014	801,085		$	26.99
Granted	523,744		31.08
Vested	(350,382	)	25.05
Forfeited	(13,939	)	28.46
Shares Outstanding at September 30, 2015	960,508		$	29.90

The total intrinsic value of restricted shares that vested during the nine months endedSeptember 30, 2015 and 2014 was $11.3 million and $8.4 million, respectively.

The Company issued 71,560, 48,569, 56,752 and 65,333 market-based restricted stock units in 2015, 2014, 2013 and 2012, 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 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. The awards issued in 2012 vested in the third quarter of 2015. Recipients of the 2012 award earned shares totaling 148% 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.

As of September 30, 2015, there was $22.7 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, 2015, 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, 2015 was approximately $1 thousand, and the net amount payable as of December 31, 2014 was approximately $1.1 million.  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, 2015, the Company’s credit exposure relating to interest rate swaps was approximately $33.7 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 $165 thousand at September 30, 2015.  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 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 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, 2015 and December 31, 2014 (in thousands):

	Asset Derivatives								Liability Derivatives
	September 30, 2015				December 31, 2014				September 30, 2015					December 31, 2014
	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)	$	—	$	—	$	—	$	—	$	165	$	(11	)	$	197	$	(15	)
Stand-alone derivative instruments: (2)
Interest rate swap contracts	2,214,393		53,421		1,509,930		37,039		1,276,393		(40,498		)	2,001,787		(30,761		)
Interest rate options contracts	138,049		186		55,830		283		138,049		(186		)	55,830		(283		)
Foreign exchange contracts	64,368		4,094		27,402		2,276		64,686		(3,857		)	27,002		(2,109		)
Spot foreign exchange contracts	1,096		12		512		5		684		(3		)	304		(18		)
Mortgage related derivatives	865,162		8,697		871,446		6,785		975,000		(9,063		)	879,841		(7,313		)
Total stand-alone derivative instruments	3,283,068		66,410		2,465,120		46,388		2,454,812		(53,607		)	2,964,764		(40,484		)
Total	$	3,283,068	$	66,410	$	2,465,120	$	46,388	$	2,454,977	$	(53,618	)	$	2,964,961	$	(40,499	)

⁽¹⁾ Hedged fixed-rate commercial real estate loans

⁽²⁾ These stand-alone derivative instruments are not designated as hedging instruments under ASC Topic 815.

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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,
	2015			2014			2015			2014
Derivative instruments designated as hedges of fair value:
Interest rate swap contracts	$	2		$	(1,869	)	$	4		$	(1,871	)
Stand-alone derivative instruments:
Interest rate swap contracts	22,862			(312		)	8,623			(294		)
Interest rate options contracts	541			—			—			—
Foreign exchange contracts	(95		)	4			91			61
Spot foreign exchange contracts	(4		)	(17		)	22			(9		)
Mortgage related derivatives	(13,183		)	1,514			(9,408		)	1,554
Total stand-alone derivative instruments	10,121			1,189			(672		)	1,312
Total	$	10,123		$	(680	)	$	(668	)	$	(559	)

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, 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	$	16,606	$	—	$	16,606	$	40,509	$	—	$	40,509
Foreign exchange contracts	3,031		—		3,031		1,971		—		1,971
Mortgage related derivatives	554		—		554		9,082		—		9,082
Total derivatives	20,191		—		20,191		51,562		—		51,562
Repurchase agreements	—		—		—		262,009		—		262,009
Total	$	20,191	$	—	$	20,191	$	313,571	$	—	$	313,571

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	Financial Assets										Financial Liabilities
	Net Amount Recognized		Financial Instruments			Collateral			Net Amount		Net Amount Recognized		Financial Instruments			Collateral			Net Amount
Derivatives:
Counterparty A	$	11,420	$	(5,966	)	$	(5,454	)	$	—	$	5,966	$	(5,966	)	$	—		$	—
Counterparty B	15		(15		)	—			—		9,803		(15		)	(9,788		)	—
Counterparty C	5,948		(5,948		)	—			—		15,275		(5,948		)	(9,327		)	—
Other counterparties	2,808		(2,808		)	—			—		20,518		(2,808		)	(16,808		)	902
Total derivatives	20,191		(14,737		)	(5,454		)	—		51,562		(14,737		)	(35,923		)	902
Repurchase agreements	—		—			—			—		262,009		—			(262,009		)	—
Total	$	20,191	$	(14,737	)	$	(5,454	)	$	—	$	313,571	$	(14,737	)	$	(297,932	)	$	902

Information about the Company's financial instruments that are eligible for offset in the consolidated balance sheet as of December 31, 2014 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	$	10,727	$	—	$	10,727	$	29,916	$	—	$	29,916
Foreign exchange contracts	1,525		—		1,525		709		—		709
Mortgage related derivatives	1,700		—		1,700		7,302		—		7,302
Total derivatives	13,952		—		13,952		37,927		—		37,927
Repurchase agreements	—		—		—		219,824		—		219,824
Total	$	13,952	$	—	$	13,952	$	257,751	$	—	$	257,751

	Financial Assets									Financial Liabilities
	Net Amount Recognized		Financial Instruments			Collateral		Net Amount		Net Amount Recognized		Financial Instruments			Collateral			Net Amount
Derivatives:
Counterparty A	$	13	$	(13	)	$	—	$	—	$	9,556	$	(13	)	$	(9,543	)	$	—
Counterparty B	145		(145		)	—		—		3,736		(145		)	(3,591		)	—
Counterparty C	6,123		(6,123		)	—		—		10,335		(6,122		)	(4,213		)	—
Other counterparties	7,671		(3,920		)	—		3,751		14,300		(3,920		)	(8,663		)	1,717
Total derivatives	13,952		(10,201		)	—		3,751		37,927		(10,200		)	(26,010		)	1,717
Repurchase agreements	—		—			—		—		219,824		—			(219,824		)	—
Total	$	13,952	$	(10,201	)	$	—	$	3,751	$	257,751	$	(10,200	)	$	(245,834	)	$	1,717

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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 and deposit gathering 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 its 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 customers and depositors.  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 mortgage loans for sale to investors and for the Company's portfolio through its retail and broker 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, 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
Three months ended September 30, 2014
Net interest income	$	88,863		$	3,216		$	3,533		$	95,612
Provision for credit losses	3,172			(58		)	(5		)	3,109
Non-interest income	27,965			16,299			16,823			61,087
Non-interest expense (1)	117,325			9,721			15,155			142,201
Income tax expense	(1,287		)	3,693			2,082			4,488
Net income	$	(2,382	)	$	6,159		$	3,124		$	6,901
Total assets	$	12,678,459		$	823,813		$	1,002,325		$	14,504,597

⁽¹⁾  Includes merger related expenses of $319 thousand and $27.2 million in the banking segment for the three months ended September 30, 2015 and 2014, respectively.

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	Banking		Leasing			Mortgage Banking			Consolidated
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
Nine months ended September 30, 2014
Net interest income	$	219,248	$	8,231		$	3,533		$	231,012
Provision for credit losses	2,488		(174		)	(5		)	2,309
Non-interest income	77,842		42,716			17,069			137,627
Non-interest expense (1)	252,952		28,171			15,155			296,278
Income tax expense	9,345		8,649			2,082			20,076
Net income	$	32,305	$	14,301		$	3,370		$	49,976
Total assets	$	12,678,459	$	823,813		$	1,002,325		$	14,504,597

⁽¹⁾  Includes merger related expenses of $9.6 million and $28.3 million in the banking segment for the nine months endedSeptember 30, 2015 and 2014, respectively.

In July 2015, the mortgage banking segment sold $103.1 million in certain mortgage servicing assets.

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.

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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 loss on sale of assets and other operating income. During the periods under report, non-interest expenses included salaries and employee benefits, 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 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 18, 2014, the Company completed the Taylor Capital Group, Inc. ("Taylor Capital") merger (the "Merger"). Total consideration paid by the Company was $648.8 million, including $519.3 million in common stock and $129.5 million in cash. The Company issued 19.6 million shares of common stock as a result of the Merger. In addition, each share of Taylor Capital’s Perpetual Non-Cumulative Preferred Stock, Series A was converted into one share of the Company's Perpetual Non-Cumulative Preferred Stock, Series A with substantially identical terms. The Company issued 4,000,000 shares of its Series A preferred stock in connection with the Merger. Holders of the Company’s 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 had net income of $40.3 million for the three months ended September 30, 2015 compared to net income of $6.9 million for the three months ended September 30, 2014. Net income available to common stockholders was $38.3 million for the three months ended September 30, 2015. Fully diluted earnings per common share were $0.51 for the three months ended September 30, 2015 compared to $0.08 per common share for the three months ended September 30, 2014. The quarter ended September 30, 2014 includes 44 days of Taylor Capital activity.

The Company had net income of $115.3 million for the nine months endedSeptember 30, 2015 compared to net income of $50.0 million for the nine months endedSeptember 30, 2014. Net income available to common stockholders was $109.3 million for the nine months endedSeptember 30, 2015. Fully diluted earnings per common share were $1.45 for the nine months endedSeptember 30, 2015 compared to $0.82 per common share for the nine months endedSeptember 30, 2014.

The results of operations for the nine months endedSeptember 30, 2015 and 2014 were impacted by $9.6 million and $28.3 million in merger related expenses, respectively, as well as having Taylor Capital for a full nine months in 2015. See "Non-interest Expenses" section for a detailed schedule of merger related expenses.

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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 reported.  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, 2015, the aggregate residual value of the equipment leased under our direct finance, leveraged, and operating leases totaled $133.8 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, 2014 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, 2015, the Company had $1.0 million 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, 2015, the Company had approximately $9 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 income.

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

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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 consists of goodwill, and core deposit and client relationship intangibles.  See Note 8 to the audited consolidated financial statements contained in our Annual Report Form 10-K for the year ended December 31, 2014 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, 2015 or 2014. We are not aware of any events or circumstances subsequent to our annual goodwill impairment testing date of December 31, 2014 that would indicate impairment of goodwill at September 30, 2015. The carrying amount of goodwill was $711.5 million at September 30, 2015 and December 31, 2014.

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.

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 Merger.

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 Merger 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."

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	Three Months Ended September 30,
(dollars in thousands)	2015						2014
	Average				Yield/		Average				Yield/
	Balance		Interest		Rate		Balance		Interest		Rate
Interest Earning Assets:
Loans held for sale	$	841,663	$	7,904	3.76	%	$	313,695	$	2,826	3.60	%
Loans (1) (2)	8,854,698		92,669		4.15		6,862,035		77,077		4.56
Loans exempt from federal income taxes (3)	330,721		3,513		4.16		320,049		3,484		4.26
Taxable investment securities	1,543,434		9,655		2.50		1,726,352		11,028		2.56
Investment securities exempt from federal income taxes (3)	1,356,702		16,541		4.88		1,087,340		13,908		5.12
Federal funds sold	38		—		1.00		15,460		14		0.38
Other interest earning deposits	138,542		89		0.25		341,758		211		0.24
Total interest earning assets	13,065,798		$	130,371	3.96		10,666,689		$	108,548	4.04
Non-interest earning assets	1,993,631						1,539,325
Total assets	$	15,059,429					$	12,206,014
Interest Bearing Liabilities:
Deposits:
NOW and money market deposit	$	4,119,625	$	1,832	0.18	%	$	3,518,314	$	1,469	0.17	%
Savings deposit	965,060		124		0.05		906,630		128		0.06
Time deposits	1,732,165		3,146		0.72		1,828,753		3,018		0.65
Short-term borrowings	1,079,978		395		0.15		570,248		231		0.16
Long-term borrowings and junior subordinated notes	282,033		1,886		2.62		272,458		2,003		2.88
Total interest bearing liabilities	8,178,861		$	7,383	0.36		7,096,403		$	6,849	0.38
Non-interest bearing deposits	4,428,065						3,175,512
Other non-interest bearing liabilities	378,276						267,915
Stockholders’ equity	2,074,227						1,666,184
Total liabilities and stockholders’ equity	$	15,059,429					$	12,206,014
Net interest income/interest rate spread (4)			$	122,988	3.60	%			$	101,699	3.66	%
Less: taxable equivalent adjustment			7,019						6,087
Net interest income, as reported			$	115,969					$	95,612
Net interest margin (5)					3.52	%					3.56	%
Tax equivalent effect					0.21	%					0.22	%
Net interest margin on a fully tax equivalent basis (5)					3.73	%					3.78	%
Effect of acquisition accounting discount accretion on loans acquired through the Merger					(0.24	)%					(0.24	)%
Net interest margin on a fully tax equivalent basis, excluding the effect of acquisition accounting discount accretion on loans acquired through the Merger					3.49	%					3.54	%

(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$21.3 million during the three months ended September 30, 2015 compared to the three months ended September 30, 2014 primarily due to the interest earning assets acquired through the Merger. The net interest margin, expressed on a fully tax equivalent basis, was 3.73% for the third quarter of 2015 and 3.78% for the third quarter of 2014. Net interest income in the third quarter of 2015 included interest income of $7.4 million resulting from accretion of the acquisition accounting discount recorded on loans acquired in the Merger in the third quarter of 2015 compared to $6.2 million in the third quarter of 2014. Excluding the purchase accounting loan discount accretion on loans acquired through the Merger, our net interest margin on a fully tax equivalent basis would have been 3.49% for the three months ended September 30, 2015 compared to 3.54% for the three months ended September 30, 2014. This decrease was primarily due to lower average yields earned on loans in the third quarter of 2015.

55

	Nine Months Ended September 30,
(dollars in thousands)	2015						2014
	Average				Yield/		Average				Yield/
	Balance		Interest		Rate		Balance		Interest		Rate
Interest Earning Assets:
Loans held for sale	$	760,956	$	20,528	3.60	%	$	105,977	$	2,826	3.56	%
Loans (1) (2)	8,688,434		277,659		4.27		5,787,407		184,672		4.27
Loans exempt from federal income taxes (3)	327,292		10,333		4.21		320,263		10,490		4.37
Taxable investment securities	1,548,369		29,591		2.55		1,516,260		27,968		2.46
Investment securities exempt from federal income taxes (3)	1,248,978		46,161		4.93		997,128		39,066		5.22
Federal funds sold	60		—		1.00		8,605		23		0.37
Other interest earning deposits	109,074		208		0.25		326,226		601		0.25
Total interest earning assets	12,683,163		$	384,480	4.05		9,061,866		$	265,646	3.92
Non-interest earning assets	2,004,278						1,331,814
Total assets	$	14,687,441					$	10,393,680
Interest Bearing Liabilities:
Deposits:
NOW and money market deposit	$	3,999,844	$	5,061	0.17	%	$	3,045,178	$	3,216	0.14	%
Savings deposit	963,291		379		0.05		879,336		334		0.05
Time deposits	1,780,491		8,861		0.67		1,548,468		8,588		0.74
Short-term borrowings	942,057		1,027		0.15		319,697		426		0.18
Long-term borrowings and junior subordinated notes	279,290		5,542		2.62		243,659		4,725		2.56
Total interest bearing liabilities	7,964,973		$	20,870	0.35		6,036,338		$	17,289	0.38
Non-interest bearing deposits	4,301,483						2,677,865
Other non-interest bearing liabilities	362,794						227,261
Stockholders’ equity	2,058,191						1,452,216
Total liabilities and stockholders’ equity	$	14,687,441					$	10,393,680
Net interest income/interest rate spread (4)			$	363,610	3.70	%			$	248,357	3.54	%
Less: taxable equivalent adjustment			19,773						17,345
Net interest income, as reported			$	343,837					$	231,012
Net interest margin (5)					3.62	%					3.41	%
Tax equivalent effect					0.21	%					0.25	%
Net interest margin on a fully tax equivalent basis (5)					3.83	%					3.66	%
Effect of acquisition accounting discount accretion on loans acquired through the Merger					(0.27	)%					(0.09	)%
Net interest margin on a fully tax equivalent basis, excluding the effect of acquisition accounting discount accretion on loans acquired through the Merger					3.56	%					3.57	%

(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$115.3 million during the nine months endedSeptember 30, 2015 compared to the nine months endedSeptember 30, 2014 primarily due to the interest earning assets acquired through the Merger. The net interest margin, expressed on a fully tax equivalent basis, was 3.83% for the nine months endedSeptember 30, 2015 and 3.66% for the nine months endedSeptember 30, 2014. Net interest income in the nine months endedSeptember 30, 2015 included interest income of $23.9 million resulting from accretion of the acquisition accounting discount recorded on loans acquired in the Merger compared to $6.2 million in the nine months endedSeptember 30, 2014. Excluding the purchase accounting loan discount accretion on loans acquired through the Merger, our net interest margin on a fully tax equivalent basis would have been 3.56% for the nine months endedSeptember 30, 2015 compared to 3.57% in the same period in the prior year.

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Non-interest Income

	Three Months Ended
	September 30,
	2015		2014			Increase/ (Decrease)			Percentage Change
Non-interest income (in thousands):
Lease financing, net	$	20,000	$	17,719		$	2,281		12.9	%
Mortgage banking revenue	30,692		16,823			13,869			82.4
Commercial deposit and treasury management fees	11,472		9,345			2,127			22.8
Trust and asset management fees	6,002		5,712			290			5.1
Card fees	3,335		3,836			(501		)	(13.1	)
Capital markets and international banking fees	2,357		1,472			885			60.1
Consumer and other deposit service fees	3,499		3,362			137			4.1
Brokerage fees	1,281		1,145			136			11.9
Loan service fees	1,531		1,069			462			43.2
Increase in cash surrender value of life insurance	852		855			(3		)	(0.4	)
Net gain (loss) on investment securities	371		(3,246		)	3,617			(111.4	)
Net gain (loss) on sale of assets	1		(7		)	8			(114.3	)
Gain on early extinguishment of debt	—		1,895			(1,895		)	(100.0	)
Other operating income	858		1,107			(249		)	(22.5	)
Total non-interest income	$	82,251	$	61,087		$	21,164		34.6	%

Non-interest income increased by $21.2 million, or 34.6%, for the three months ended September 30, 2015 compared to the three months ended September 30, 2014 primarily due to the Merger. The quarter ended September 30, 2014 includes 44 days of Taylor Capital activity.

• Mortgage banking revenue increased due to the mortgage operations acquired through the Merger.

• Leasing revenues increased due to higher fees and promotional revenue from the sale of third-party equipment maintenance contracts.

• Commercial deposit and treasury management fees increased due to new business as well as the increased customer base as a result of the Merger.

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

• Card fees decreased primarily as a result of the impact from being subject to the Durbin amendment of the Dodd-Frank Act for the first time in the third quarter of 2015.

• A gain on the early extinguishment of debt and a net loss on investment securities were recognized in the third quarter of 2014 as a result of the balance sheet repositioning that occurred in September 2014.

57

	Nine Months Ended
	September 30,
	2015			2014			Increase/ (Decrease)			Percentage Change
Non-interest income (in thousands):
Lease financing, net	$	60,644		$	45,768		$	14,876		32.5	%
Mortgage banking revenue	90,884			17,069			73,815			NM
Commercial deposit and treasury management fees	33,572			23,595			9,977			42.3
Trust and asset management fees	17,468			16,324			1,144			7.0
Card fees	11,671			9,841			1,830			18.6
Capital markets and international banking fees	5,793			3,810			1,983			52.0
Consumer and other deposit service fees	9,842			9,453			389			4.1
Brokerage fees	4,502			3,826			676			17.7
Loan service fees	4,369			2,950			1,419			48.1
Increase in cash surrender value of life insurance	2,527			2,516			11			0.4
Net loss on investment securities	(173		)	(3,016		)	2,843			(94.3	)
Net loss on sale of assets	(2		)	(24		)	22			(91.7	)
Gain on early extinguishment of debt	—			1,895			(1,895		)	(100.0	)
Other operating income	5,371			3,620			1,751			48.4
Total non-interest income	$	246,468		$	137,627		$	108,841		79.1	%

Non-interest income increased by $108.8 million, or 79.1%, for the nine months endedSeptember 30, 2015 compared to the nine months endedSeptember 30, 2014.

• Mortgage banking revenue increased due to mortgage operations acquired through the Merger.

• Leasing revenues increased due to higher fees and promotional revenue from the sale of third-party equipment maintenance contracts and higher lease residual realization.

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

• Capital markets and international banking services fees increased due to higher swap and syndication fees partly offset by a decrease in M&A advisory fees.

• Card fees increased due to a new payroll prepaid card program that started in the second quarter of 2014 as well as higher debit and credit card fees, which were partly offset by the impact from being subject to the Durbin amendment of the Dodd-Frank Act for the first time in the third quarter of 2015.

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

• Loan service fees increased due to increased unused line fees.

• Trust and asset management fees increased due to the addition of new customers.

• A gain on the early extinguishment of debt and a net loss on investment securities were recognized in the 2014 period as a result of the balance sheet repositioning that occurred in September 2014.

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Non-interest Expenses

	Three Months Ended
	September 30,
	2015		2014		Increase/ (Decrease)			Percentage Change
Non-interest expenses (in thousands):
Salaries and employee benefits	$	87,891	$	79,492	$	8,399		10.6	%
Occupancy and equipment	12,458		11,742		716			6.1
Computer services and telecommunication	8,567		11,506		(2,939		)	(25.5	)
Advertising and marketing	2,578		2,235		343			15.3
Professional and legal	1,801		8,864		(7,063		)	(79.7	)
Other intangibles amortization	1,542		1,470		72			4.9
Branch exit and facilities impairment charges	70		—		70			100.0
Net loss recognized on other real estate owned and other expense	577		2,178		(1,601		)	(73.5	)
Other operating expenses	18,782		24,714		(5,932		)	(24.0	)
Total non-interest expenses	$	134,266	$	142,201	$	(7,935	)	(5.6	)%

Non-interest expenses decreased by $7.9 million, or 5.6%, for the three months ended September 30, 2015 from the three months ended September 30, 2014. The changes were primarily due to the Merger. Other explanations for changes excluding merger related expenses and increases due to the operations acquired through the Merger are as follows:

• Other operating expenses in the third quarter of 2014 included the $10.6 million contingent consideration related to the acquisition of Celtic Leasing Corp., which was completed in 2012.

• Lower losses were recognized on other real estate owned in the third quarter of 2015 compared to the third quarter of 2014.

• Professional and legal expense decreased primarily due to less legal expense.

• Computer services and telecommunication expenses increased due to an increase in spending on IT security and our data warehouse.

• Advertising and marketing expense was higher due to increased advertising and sponsorships.

Non-interest expenses include $319 thousand and $27.2 million in expenses related to the Merger for the three months ended September 30, 2015 and 2014, respectively. The following table presents the detail of the merger related expenses (dollars in thousands):

	Three Months Ended
	September 30,
	2015		2014
Merger related expenses:
Salaries and employee benefits	$	3	$	14,259
Occupancy and equipment expense	2		428
Computer services and telecommunication expense	9		5,312
Advertising and marketing expense	—		262
Professional and legal expense	305		6,363
Other operating expenses	—		537
Total merger related expenses	$	319	$	27,161

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	Nine Months Ended
	September 30,
	2015		2014		Increase/ (Decrease)			Percentage Change
Non-interest expenses (in thousands):
Salaries and employee benefits	$	258,822	$	170,491	$	88,331		51.8	%
Occupancy and equipment expense	37,575		30,852		6,723			21.8
Computer services and telecommunication expense	26,008		21,669		4,339			20.0
Advertising and marketing expense	7,521		6,537		984			15.1
Professional and legal expense	6,884		12,210		(5,326		)	(43.6	)
Other intangibles amortization expense	4,569		3,884		685			17.6
Branch exit and facilities impairment charges	7,899		—		7,899			100.0
Net loss recognized on other real estate owned and other expense	2,197		3,289		(1,092		)	(33.2	)
Prepayment fees on interest bearing liabilities	85		—		85			100.0
Other operating expenses	55,363		47,346		8,017			16.9
Total non-interest expenses	$	406,923	$	296,278	$	110,645		37.3	%

Non-interest expenses increased by $110.6 million, or 37.3%, for the nine months endedSeptember 30, 2015 from the nine months endedSeptember 30, 2014 primarily due to the Merger. Other explanations for changes excluding merger related expenses and increases due to the operations acquired through the Merger are as follows:

• Other operating expense increased as a result of an increase in filing and other loan expense and higher FDIC assessments due to our larger balance sheet.

• Computer services and telecommunication expenses increased due to an increase in spending on IT security and other IT projects.

• Advertising and marketing expense was higher due to increased advertising and sponsorships.

• Professional and legal expense increased due to higher consulting expense.

• Lower losses were recognized on other real estate owned in the 2015 period compared to the 2014 period.

Non-interest expenses include $9.6 million and $28.3 million in expenses related to the Merger for the nine months endedSeptember 30, 2015 and 2014, respectively. The following table presents the detail of the merger related expenses (dollars in thousands):

	Nine Months Ended
	September 30,
	2015		2014
Merger related expenses:
Salaries and employee benefits	$	36	$	14,363
Occupancy and equipment expense	275		442
Computer services and telecommunication expense	409		5,495
Advertising and marketing expense	—		460
Professional and legal expense	1,006		6,852
Branch exit and facilities impairment charges	7,829		—
Other operating expenses	67		717
Total merger related expenses	$	9,622	$	28,329

Income Taxes

Income tax expense for the nine months endedSeptember 30, 2015 was $53.4 million compared to $20.1 million for the nine months endedSeptember 30, 2014. The increase was primarily due to an increase in our pre-tax income during the nine months endedSeptember 30, 2015.

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Operating Segments

The Company's operations consist of three reportable operating segments: banking, leasing and mortgage banking. Our banking segment generates its revenues primarily from its lending and deposit gathering activities. Our 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 (formerly known as Cole Taylor 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.

Net income from our banking segment for the three months ended September 30, 2015increased$33.2 million to $30.9 million compared to the three months ended September 30, 2014. This increase in net income was primarily due to less merger related expenses as well as an increase in net interest income as a result of the interest earning assets acquired through the Merger. Net income from our leasing segment for the three months ended September 30, 2015increased$638 thousand to $6.8 million compared to the three months ended September 30, 2014. Lease financing revenues increased due to an increase in fees and promotional revenue from the sale of third-party equipment maintenance contracts. This increase in revenues was partially offset by an increase in salaries and employee benefits due to higher commissions on higher leasing revenue. Net income from our mortgage banking segment for the three months ended September 30, 2015decreased$510 thousand to $2.6 million compared to the three months ended September 30, 2014 due to an increase in salaries and benefits expense partly offset by an increase in mortgage banking revenue as a result of the mortgage banking operations acquired through the Merger.

Net income from our banking segment for the nine months endedSeptember 30, 2015increased$55.5 million to $87.8 million compared to the nine months endedSeptember 30, 2014. This increase in net income was primarily due to higher net interest income as a result of the interest earning assets acquired through the Merger. The higher net interest income was partially offset by an increase in salary and employee benefits due primarily to the increase in headcount resulting from the Merger, as well as other increases in non-interest expense resulting from the Merger. Net income from our leasing segment for the nine months endedSeptember 30, 2015increased$6.2 million to $20.5 million compared to the nine months endedSeptember 30, 2014. Lease financing revenues increased due to an increase in fees and promotional revenue from the sale of third-party equipment maintenance contracts. This increase in revenues was partially offset by an increase in salaries and employee benefits due to higher commissions on higher leasing revenue as well as a higher provision for credit losses. Net income from our mortgage banking segment for the nine months endedSeptember 30, 2015increased$3.7 million to $7.0 million compared to the nine months endedSeptember 30, 2014 as a result of the mortgage banking operations acquired through the Merger.

Balance Sheet

Total assets increased$348.0 million, or 2.4%, from $14.6 billion at December 31, 2014 to $15.0 billion at September 30, 2015. 

• Cash and cash equivalents decreased$11.8 million, or 3.8% from $312.1 million at December 31, 2014 to $300.2 million at September 30, 2015.

• Investment securities increased$143.8 million, or 5.3%, from December 31, 2014 to September 30, 2015 mostly as a result of municipal bond purchases.

• Total loans, excluding purchased credit-impaired and covered loans, increased by $401.9 million to $9.2 billion at September 30, 2015 from December 31, 2014 primarily due to an increase in originations of commercial related loans.

• Mortgage servicing rights decreased by $87.3 million, or 37.1%, from $235.4 million at December 31, 2014 to $148.1 million at September 30, 2015 primarily due to the sale of $103.1 million in certain mortgage servicing assets in July 2015.

Total liabilities increased by $313.1 million, or 2.5%, from $12.6 billion at December 31, 2014 to $12.9 billion at September 30, 2015 primarily due to an increase in deposits.

• Total deposits increased by $263.6 million, or 2.4%, to $11.3 billion at September 30, 2015 from December 31, 2014.

• Noninterest bearing deposits increased by $315.8 million, or 7.7%, compared to December 31, 2014.

61

• Total borrowings increased by $21.7 million, or 1.8%, to $1.2 billion at September 30, 2015 primarily due to the increase in short-term FHLB advances.

Total stockholders’ equity increased$34.9 million to $2.1 billion at September 30, 2015 compared to December 31, 2014 primarily as a result of earnings for the year 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, 2015				December 31, 2014				September 30, 2014
	Amortized Cost		Fair Value		Amortized Cost		Fair Value		Amortized Cost		Fair Value
Available for sale
U.S. Government sponsored agencies and enterprises	$	64,008	$	65,461	$	64,612	$	65,873	$	64,809	$	65,829
States and political subdivisions	379,015		399,274		390,076		410,854		391,900		409,033
Residential mortgage-backed securities	683,955		693,225		713,413		720,563		795,554		801,940
Commercial mortgage-backed securities	150,836		154,201		186,110		187,662		204,076		204,162
Corporate bonds	228,711		228,251		259,526		259,203		265,720		267,239
Equity securities	10,701		10,826		10,531		10,597		10,470		10,447
Total Available for Sale	1,517,226		1,551,238		1,624,268		1,654,752		1,732,529		1,758,650
Held to maturity
States and political subdivisions	1,002,963		1,031,008		752,558		782,265		760,674		788,097
Residential mortgage-backed securities	221,889		232,204		240,822		252,796		244,675		257,420
Total Held to Maturity	1,224,852		1,263,212		993,380		1,035,061		1,005,349		1,045,517
Total	$	2,742,078	$	2,814,450	$	2,617,648	$	2,689,813	$	2,737,878	$	2,804,167

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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 (dollars in thousands):

	September 30, 2015								December 31, 2014
	Legacy (1)		Taylor Capital Acquired (2)		Total		% of Total		Legacy (1)		Taylor Capital Acquired (2)		Total		% of Total
Commercial related credits:
Commercial loans	$	2,644,551	$	796,081	$	3,440,632	37	%	$	1,841,851	$	1,403,355	$	3,245,206	36	%
Commercial loans collateralized by assignment of lease payments	1,592,832		100,708		1,693,540		18		1,574,046		118,212		1,692,258		18
Commercial real estate	1,868,283		711,726		2,580,009		27		1,652,398		892,469		2,544,867		28
Construction real estate	202,080		53,540		255,620		3		112,024		135,044		247,068		3
Total commercial related credits	6,307,746		1,662,055		7,969,801		85		5,180,319		2,549,080		7,729,399		85
Other loans:
Residential real estate	435,460		171,711		607,171		6		326,330		176,957		503,287		5
Indirect vehicle	343,504		2,227		345,731		4		266,334		2,506		268,840		3
Home equity	206,903		16,270		223,173		2		227,324		24,585		251,909		3
Other consumer loans	87,037		575		87,612		1		77,408		729		78,137		1
Total other loans	1,072,904		190,783		1,263,687		13		897,396		204,777		1,102,173		12
Total loans excluding purchased credit-impaired loans	7,380,650		1,852,838		9,233,488		98		6,077,715		2,753,857		8,831,572		97
Purchased credit-impaired loans	53,487		102,206		155,693		2		77,352		174,293		251,645		3
Total loans	$	7,434,137	$	1,955,044	$	9,389,181	100	%	$	6,155,067	$	2,928,150	$	9,083,217	100	%

⁽¹⁾  Legacy loans include all loans other than those acquired through the Merger, including loans acquired in connection with our FDIC-assisted transactions and our other acquisition transactions, as well as new loans originated subsequent to the Merger.

⁽²⁾  Represents loans acquired through the Merger that have not yet been renewed. These balances will decrease to zero over time.

Gross loans, excluding purchased credit-impaired and covered loans, increased by $401.9 million to $9.2 billion at September 30, 2015 from December 31, 2014. Gross loans increased by $306.0 million to $9.4 billion at September 30, 2015 from $9.1 billion at December 31, 2014. This increase was primarily due to increases in originations of commercial related 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.

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, 2015			December 31, 2014			September 30, 2014
Non-performing loans:
Non-accruing loans	$	92,302		$	82,733		$	97,580
Loans 90 days or more past due, still accruing interest	4,275			4,354			2,681
Total non-performing loans	96,577			87,087			100,261
Other real estate owned	29,587			19,198			18,817
Repossessed assets	216			93			126
Total non-performing assets	$	126,380		$	106,378		$	119,204
Potential problem loans (1)	$	122,966		$	55,651		$	51,690
Purchased credit-impaired loans	$	155,693		$	251,645		$	288,186
Total allowance for loan and lease losses	$	124,626		$	110,026		$	102,810
Accruing restructured loans (2)	20,120			15,603			16,877
Total non-performing loans to total loans	1.03		%	0.96		%	1.12		%
Total non-performing assets to total assets	0.85			0.73			0.82
Allowance for loan and lease losses to non-performing loans	129.04			126.34			102.54

⁽¹⁾  For additional information regarding potential problem loans, see "Potential Problem Loans" below.

⁽²⁾  Accruing restructured loans consists primarily of residential real estate and home equity 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 consist 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 income statement. 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 MB Financial 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 resale of repossessed automobiles is less than 90 days unless significant repairs to the vehicle are needed which occasionally results in a longer holding period. The typical holding period for

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motorcycles can be more than 90 days, as the average motorcycle re-sale period is longer than the average automobile re-sale period. The longer average period for motorcycles is a result of cyclical trends in the motorcycle market.

Other real estate owned that is related to our FDIC-assisted transactions is excluded from non-performing assets.  Other real estate owned related to the Heritage, Benchmark, Broadway, and New Century FDIC-assisted transactions totaled $13.8 million and $18.2 million at September 30, 2015 and December 31, 2014, respectively.

The following table presents a summary of other real estate owned, excluding assets related to FDIC-assisted transactions, for the nine months endedSeptember 30, 2015 and 2014 (in thousands):

	September 30,
	2015			2014
Beginning balance	$	19,198		$	23,289
Transfers in at fair value less estimated costs to sell	15,612			872
Acquired from business combination	—			4,720
Fair value adjustments	(2,407		)	(2,509		)
Net gains on sales of other real estate owned	337			835
Cash received upon disposition	(3,153		)	(8,390		)
Ending balance	$	29,587		$	18,817

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, 2015		December 31, 2014
Commercial loans	$	90,079	$	16,065
Commercial loans collateralized by assignment of lease payments	1,309		2,264
Commercial real estate	31,578		37,322
Total	$	122,966	$	55,651

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.

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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 rating migrations for 14 years. The migration data is adjusted by using average losses for an economic cycle (approximately 13 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:  initial unemployment insurance claims in Illinois, our prior period charge-off rates and crude oil prices.

Commercial real estate loans and construction loans:  M2 Money stock, our prior period charge-off rates and the U.S. commercial real estate 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 $93.9 million as of September 30, 2015 and $85.1 million as of December 31, 2014. The increase in the commercial related general loss reserve was due to the provision related to the acquired Taylor Capital loans. 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 that 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

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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 $13.7 million as of September 30, 2015 compared to $5.2 million as of December 31, 2014.   The increase relates to four commercial related loan relationships.

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 $17.0 million at September 30, 2015 and $19.8 million at December 31, 2014.

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 loss, 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.

We recorded $14.6 million in provision for credit losses for acquired loans related to the non-purchase credit impaired (non-PCI) Taylor loans as accounted for in accordance with ASC 310-20 for the nine months ended September 30, 2015. No additional provisions were recorded on the purchase credit impaired (PCI) Taylor loans accounted for in accordance with ASC 310-30.

The provision for credit losses for non-PCI Taylor loans is calculated using a process similar to the one used for the MBFI legacy portfolio. A general loan loss reserve is calculated for the Taylor 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 acquired Taylor 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 Taylor 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 Taylor non-PCI loans that are 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.

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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,
	2015			2014			2015			2014
Balance at beginning of period	$	124,130		$	103,905		$	114,057		$	113,462
Allowance for unfunded credit commitments acquired through business combination	—			1,261			—			1,261
Utilization of allowance for unfunded credit commitments	—			(637		)	—			(637		)
Provision for credit losses - legacy	1,225			(1,600		)	75			(2,400		)
Provision for credit losses - acquired Taylor Capital loan portfolio	4,133			4,709			14,553			4,709
Charge-offs:
Commercial loans	1,657			606			2,283			1,142
Commercial loans collateralized by assignment of lease payments	1,980			—			2,080			40
Commercial real estate	170			1,027			2,312			9,910
Construction real estate	5			5			11			75
Residential real estate	292			740			1,189			1,438
Home equity	358			566			1,078			2,002
Indirect vehicles	581			1,043			2,082			2,546
Other consumer loans	467			497			1,391			1,582
Total charge-offs	5,510			4,484			12,426			18,735
Recoveries:
Commercial loans	456			564			1,514			2,888
Commercial loans collateralized by assignment of lease payments	11			425			1,100			555
Commercial real estate	2,402			2,227			6,338			3,279
Construction real estate	216			25			253			201
Residential real estate	337			4			417			529
Home equity	186			46			447			306
Indirect vehicles	334			402			1,354			1,283
Other consumer loans	118			65			356			211
Total recoveries	4,060			3,758			11,779			9,252
Net charge-offs	1,450			726			647			9,483
Allowance for credit losses	128,038			106,912			128,038			106,912
Allowance for unfunded credit commitments	(3,412		)	(4,102		)	(3,412		)	(4,102		)
Allowance for loan and lease losses	$	124,626		$	102,810		$	124,626		$	102,810
Total loans	$	9,389,181		$	8,975,924		$	9,389,181		$	8,975,924
Ratio of allowance to total loans	1.33		%	1.15		%	1.33		%	1.15		%
Ratio of net charge-offs to average loans	0.06			0.04			0.01			0.21

Net charge-offs of $647 thousand were recorded in the nine months endedSeptember 30, 2015 compared to net charge-offs of $9.5 million in the nine months endedSeptember 30, 2014. A provision for credit losses of $14.6 million was recorded for the nine months endedSeptember 30, 2015 compared to $2.3 million for the nine months endedSeptember 30, 2014.

The provision for credit losses for the nine months endedSeptember 30, 2015 included a provision for credit losses of $75 thousand for the legacy MB Financial portfolio and $14.6 million related to the acquired Taylor Capital portfolio for loan renewals subsequent to the acquisition date and the establishment of a corresponding general reserve for Taylor Capital loans in excess of the loan discount. We anticipate recording a provision related to the acquired portfolio in future quarters related to renewing Taylor Capital loans which will largely offset the accretion from non-purchase credit-impaired loans. In addition, included in the table above are net recoveries for the acquired Taylor Capital loans of $297 thousand and $967 thousand for the three and nine months endedSeptember 30, 2015, respectively.

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

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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 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 loss allowances may become necessary.

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Lease Investments

The lease portfolio is comprised of various types of equipment, generally technology related, including computer systems and satellite equipment, material handling and general manufacturing equipment. 

Lease investments by categories follow (in thousands):

	September 30, 2015			December 31, 2014			September 30, 2014
Direct finance leases:
Minimum lease payments	$	345,344		$	340,602		$	312,507
Estimated unguaranteed residual values	68,297			70,469			62,628
Less: unearned income	(30,300		)	(31,229		)	(29,448		)
Direct finance leases (1)	$	383,341		$	379,842		$	345,687
Leveraged leases:
Minimum lease payments	$	4,610		$	10,689		$	13,549
Estimated unguaranteed residual values	845			1,586			1,712
Less: unearned income	(187		)	(540		)	(734		)
Less: related non-recourse debt	(4,482		)	(10,330		)	(13,064		)
Leveraged leases (1)	$	786		$	1,405		$	1,463
Operating leases:
Equipment, at cost	$	290,786		$	257,495		$	231,529
Less accumulated depreciation	(106,563		)	(94,662		)	(94,409		)
Lease investments, net	$	184,223		$	162,833		$	137,120

⁽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 $49.8 million at September 30, 2015, $38.5 million at December 31, 2014 and $32.8 million at September 30, 2014.

At September 30, 2015, 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
2015	$	2,402	$	161	$	5,408	$	7,971
2016	7,245		561		10,094		17,900
2017	20,259		104		9,441		29,804
2018	15,735		19		10,594		26,348
2019	10,321		—		6,387		16,708
Thereafter	12,335		—		22,684		35,019
	$	68,297	$	845	$	64,608	$	133,750

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 usually limit individual leased equipment residuals to approximately $1 million per transaction and 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 3,942 leases at September 30, 2015 compared to 3,793 at December 31, 2014.  The average residual value per lease schedule was approximately $34 thousand at September 30, 2015 and December 31, 2014.  The average residual value per master lease schedule was approximately $142 thousand at September 30, 2015 and $155 thousand at December 31, 2014, 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 $159.0 million for the nine months endedSeptember 30, 2015 compared to net cash flows provided by operating activities of $298.2 million for the nine months endedSeptember 30, 2014. The change is primarily due to the increase in other assets partly offset by the increase in earnings.

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, 2015, the Company had net cash flows used in investing activities of $363.9 million compared to net cash flows provided by investing activities of $688.5 million for the nine months endedSeptember 30, 2014.  The change is primarily due to the increase in loans and less investment securities sales during the nine months endedSeptember 30, 2015.

Cash flows from financing activities include transactions and events whereby cash is obtained from depositors, creditors or investors.  For the nine months endedSeptember 30, 2015, the Company had net cash flows provided by financing activities of $193.0 million compared to net cash flows used in financing activities of $1.0 billion for the nine months endedSeptember 30, 2014.  The change in cash flows from financing activities was primarily due to an increase in deposits and an increase in short-term borrowings compared to the decrease during the nine months endedSeptember 30, 2014.

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, 2015, there were no firm lending commitments in place, management believes that we could borrow approximately $308 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, 2015, the Company had $680.3 million outstanding in FHLB advances, and could borrow an additional amount of approximately $1.1 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, 2015, the Company had approximately $1.4 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. The holding company had $32.4 million in cash as of September 30, 2015.

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, 2015 as compared to December 31, 2014.

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 and Tier 1 capital to average assets ratio to fall below 12%, 9% and 8%, respectively.  See “Item 1. Business — Supervision and Regulation” in our Annual Report on Form 10-K for the year ended December 31, 2014.

At September 30, 2015, the Company’s total risk-based capital ratio was 12.94%, Tier 1 capital to risk-weighted assets ratio was 11.92%, common equity Tier 1 capital to risk-weighted assets ratio was 9.56% and Tier 1 capital to average asset ratio was 10.43%. At September 30, 2015, MB Financial Bank’s total risk-based capital ratio was 12.38%, Tier 1 capital to risk-weighted

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assets ratio was 11.35%, common equity Tier 1 capital to risk-weighted assets ratio was 11.35% and Tier 1 capital to average asset ratio was 9.94%. MB Financial Bank was categorized as “Well-Capitalized” at September 30, 2015 under the regulations of the Office of the Comptroller of the Currency.

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 Merger. 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 Merger 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 Merger 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 Merger and our other merger and acquisition activities might not be realized within the anticipated time frames or at all; (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 and lease losses, which could necessitate additional provisions for loan losses, resulting both from loans we originate and loans we acquire from other financial institutions; (3) results of examinations by the Office of Comptroller of Currency, the Federal Reserve Board, the Consumer Financial Protection Bureau and other regulatory authorities, including the possibility that any such regulatory authority may, among other things, require us to increase our allowance for loan and lease losses or write-down assets; (4) competitive pressures among depository institutions; (5) interest rate movements and their impact on customer behavior, net interest margin and the value of our mortgage servicing rights; (6) the possibility that our mortgage banking business may increase volatility in our 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 rights; (7) the impact of repricing and competitors’ pricing initiatives on loan and deposit products; (8) fluctuations in real estate values; (9) the ability to adapt successfully to technological changes to meet customers’ needs and developments in the market-place; (10) the possibility that our security measures might not be sufficient to mitigate the risk of a cyber attack or cyber theft, and that our security measures might not protect us from systems failures or interruptions; (11) our ability to realize the residual values of our direct finance, leveraged, and operating leases; (12) our ability to access cost-effective funding; (13) changes in financial markets; (14) changes in economic conditions in general and in the Chicago metropolitan area in particular; (15) the costs, effects and outcomes of litigation; (16) 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, other governmental initiatives affecting the financial services industry and changes in federal and/or state tax laws or interpretations thereof by taxing authorities; (17) changes in accounting principles, policies or guidelines; (18) our future

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acquisitions of other depository institutions or lines of business; and (19) 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 negative gap would tend to adversely affect net interest income.  Conversely, during a period of falling interest rates, a negative gap position would tend to result in an increase in net interest income.

The following table sets forth the amounts of interest earning assets and interest bearing liabilities outstanding at September 30, 2015 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, 2015 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	$	64,145		$	—		$	1,880		$	—		$	66,025
Investment securities	261,945			361,199			1,440,573			803,773			2,867,490
Loans held for sale	676,020			—			—			—			676,020
Loans, including covered loans	4,597,818			1,569,638			3,054,898			166,827			9,389,181
Total interest earning assets	$	5,599,928		$	1,930,837		$	4,497,351		$	970,600		$	12,998,716
Interest Bearing Liabilities:
NOW and money market deposit accounts	$	277,931		$	759,948		$	2,252,265		$	839,270		$	4,129,414
Savings deposits	52,245			147,277			541,683			212,541			953,746
Time deposits	389,448			732,283			615,120			500			1,737,351
Short-term borrowings	733,701			59,750			133,289			13,789			940,529
Long-term borrowings	6,008			56,878			29,731			2,558			95,175
Junior subordinated notes issued to capital trusts	186,068			—			—			—			186,068
Total interest bearing liabilities	$	1,645,401		$	1,756,136		$	3,572,088		$	1,068,658		$	8,042,283
Rate sensitive assets (RSA)	$	5,599,928		$	7,530,765		$	12,028,116		$	12,998,716		$	12,998,716
Rate sensitive liabilities (RSL)	1,645,401			3,401,537			6,973,625			8,042,283			8,042,283
Cumulative GAP (GAP=RSA-RSL)	3,954,527			4,129,228			5,054,491			4,956,433			4,956,433
RSA/Total assets	37.46		%	50.37		%	80.46		%	86.95		%	86.95		%
RSL/Total assets	11.01			22.75			46.65			53.79			53.79
GAP/Total assets	26.45			27.62			33.81			33.15			33.15
GAP/RSA	70.62			54.83			42.02			38.13			38.13

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, 2015					December 31, 2014
Levels of	Dollar			Percentage		Dollar			Percentage
Interest Rates	Change			Change		Change			Change
+ 2.00%	$	29,571		6.51	%	$	19,270		4.60	%
+ 1.00%	14,308			3.15		7,930			1.89
- 1.00%	(19,843		)	(4.37	)	(20,299		)	(4.85	)

In the interest rate sensitivity table above, changes in net interest income between September 30, 2015 and December 31, 2014 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, 2015 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, 2015, 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, 2015, 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, 2014.

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

The following table sets forth information for the three months ended September 30, 2015 with respect to our repurchases of our outstanding common shares:

	Total Number of Shares Purchased (1)	Average Price Paid per Share		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, 2015 — July 31, 2015	2,765	$	34.16	—	$	46,945
August 1, 2015 — August 31, 2015	432,526	31.99		406,900	33,936
September 1, 2015 — September 30, 2015	1,002,762	32.18		968,039	2,785
Total	1,438,053	$	32.13	1,374,939

⁽¹⁾  Includes shares withheld to satisfy tax withholding obligations upon the exercise of stock options and vesting of restricted stock awards (2,765, 25,626 and 34,723 during the first, second and third months of the three months ended September 30, 2015, respectively) as well as shares purchased under the publicly announced repurchase program.

In the second quarter of 2015, the Company's Board of Directors authorized the Company to purchase up to $50 million of the Company's common stock from time to time over twelve-month period, subject to market conditions and other factors. The Company purchased $47.2 million, or approximately 1.5 million shares, of its common stock through September 30, 2015. The Company purchased the remaining $2.8 million in October 2015.

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 4, 2015	By:	/s/Mitchell Feiger
			Mitchell Feiger
			President and Chief Executive Officer
			(Principal Executive Officer)
Date:	November 4, 2015	By:	/s/Jill E. York
			Jill E. York
			Vice President and Chief Financial Officer
			(Principal Financial and Principal Accounting Officer)

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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))
3.1	Charter of the Registrant, as amended (incorporated herein by reference to Exhibit 3.1 to the Registrant’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2014 (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))
3.2	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))
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

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EXHIBIT INDEX
Exhibit Number	Description
10.1	Letter Agreement, dated as of December 5, 2008, between the Registrant and the United States Department of the Treasury (incorporated herein by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed on December 8, 2008 (File No.0-24566-01))
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 Larry J. Kallembach, Brian Wildman, Rosemarie Bouman and Susan Peterson (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 each of Mark A. Heckler and Edward F. Milefchik (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 each of Randall T. Conte, Michael J. Morton, Lawrence G. Ryan and Michael D. Sharkey (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))
10.4E	Separation Agreement by and between MB Financial Bank, National Association, and Larry J. Kallembach (incorporated herein by reference to Exhibit 10.4E to the Registrant’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2015 (File No. 001-36599))
10.5	Form of Letter Agreement dated December 4, 2008 between MB Financial, Inc. and each of Mitchell Feiger, Jill E. York, Larry J. Kallembach, Brian Wildman, Rosemarie Bouman, and Susan Peterson relating to the TARP Capital Purchase Program (incorporated herein by reference to Exhibit 10.5 to the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2008 (File No. 0-24566-01))
10.5A	Form of Compensation Amendment and Waiver Agreement under the TARP Capital Purchase Program between MB Financial, Inc. and certain employees (incorporated herein by reference to Exhibit 10.5A to the Registrant’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2009 (File No. 0-24566-01))
10.5B	Form of Compensation Amendment and Waiver Agreement under the TARP Capital Purchase Program between MB Financial, Inc. and each of Mark A. Heckler and Edward F. Milefchik (incorporated herein by reference to Exhibit 10.5B to the Registrant’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2011 (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))

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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, Larry J. Kallembach, Edward F. Milefchik, Susan G. Peterson 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, Larry J. Kallembach, Brian Wildman, and Susan Peterson (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))

81

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))

82

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))

83

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, 2015, 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

84

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 4, 2015

/s/ Mitchell Feiger

Mitchell Feiger

President and Chief Executive Officer 

EX-31.2

EXHIBIT 31.2

CERTIFICATION

I, Jill E. York, 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 4, 2015

/s/ Jill E. York

Jill E. York

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, 2015 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 4, 2015	/s/Mitchell Feiger
		Mitchell Feiger
		President and Chief Executive Officer
Date:	November 4, 2015	/s/Jill E. York
		Jill E. York
		Vice President and Chief Financial Officer

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Operating Segments (Tables)

9 Months Ended

Sep. 30, 2015

Segment Reporting [Abstract]

Schedule of Segment Reporting Information by Segment

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

	Banking			Leasing			Mortgage Banking			Consolidated
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
Three months ended September 30, 2014
Net interest income	$	88,863		$	3,216		$	3,533		$	95,612
Provision for credit losses	3,172			(58		)	(5		)	3,109
Non-interest income	27,965			16,299			16,823			61,087
Non-interest expense (1)	117,325			9,721			15,155			142,201
Income tax expense	(1,287		)	3,693			2,082			4,488
Net income	$	(2,382	)	$	6,159		$	3,124		$	6,901
Total assets	$	12,678,459		$	823,813		$	1,002,325		$	14,504,597

⁽¹⁾  Includes merger related expenses of $319 thousand and $27.2 million in the banking segment for the three months ended September 30, 2015 and 2014, respectively.

	Banking		Leasing			Mortgage Banking			Consolidated
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
Nine months ended September 30, 2014
Net interest income	$	219,248	$	8,231		$	3,533		$	231,012
Provision for credit losses	2,488		(174		)	(5		)	2,309
Non-interest income	77,842		42,716			17,069			137,627
Non-interest expense (1)	252,952		28,171			15,155			296,278
Income tax expense	9,345		8,649			2,082			20,076
Net income	$	32,305	$	14,301		$	3,370		$	49,976
Total assets	$	12,678,459	$	823,813		$	1,002,325		$	14,504,597

⁽¹⁾  Includes merger related expenses of $9.6 million and $28.3 million in the banking segment for the nine months endedSeptember 30, 2015 and 2014, respectively.

In July 2015, the mortgage banking segment sold $103.1 million in certain mortgage servicing assets.

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Loans (Details 7) $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($)
Financing Receivable, Modifications, Post Modification Recorded Investment [Roll Forward]
Ending balance	$ 6,267
Performing
Financing Receivable, Modifications, Post Modification Recorded Investment [Roll Forward]
Beginning balance	15,603
Additions	4,370
Charge-offs	0
Principal payments, net	(281)
Removals	(3,417)
Transfer to other real estate owned	0
Transfers in	4,034
Transfers out	(189)
Ending balance	20,120
Non-performing loan aging
Financing Receivable, Modifications, Post Modification Recorded Investment [Roll Forward]
Beginning balance	25,771
Additions	1,897
Charge-offs	(244)
Principal payments, net	(631)
Removals	(1,113)
Transfer to other real estate owned	(482)
Transfers in	189
Transfers out	(4,034)
Ending balance	$ 21,353

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Loans (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($) investmentrating	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)
Loans
Loans	$ 9,233,488	$ 8,831,572
Purchased credit-impaired loans	155,693	251,645
Total loans	$ 9,389,181	9,083,217	$ 8,975,924
Number of highest rating categories by rating services company | investmentrating	1
Number of highest rating categories to be achieved for classification as investment grade companies | investmentrating	4
Percentage of collateral pledge of first mortgage loans as per agreement	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	$ 3,500,000	2,000,000
Loans required to be pledged as collateral for long-term Federal Home Loan Bank advances	1,800,000	1,300,000
Commercial loans
Loans
Loans	3,440,632	3,245,206
Total loans	3,477,821		3,186,234
Commercial loans collateralized by assignment of lease payments
Loans
Loans	1,693,540	1,692,258
Total loans	1,693,540		1,631,660
Commercial real estate
Loans
Loans	2,580,009	2,544,867
Total loans	2,627,812		2,757,416
Residential real estate
Loans
Loans	607,171	503,287
Total loans	650,906		520,223
Construction real estate
Loans
Loans	255,620	247,068
Total loans	267,992		252,450
Indirect vehicle
Loans
Loans	345,731	268,840
Total loans	345,731		273,038
Home equity lines
Loans
Loans	223,173	251,909
Total loans	235,159		263,092
Other consumer loans
Loans
Loans	87,612	$ 78,137
Total loans	$ 90,220		$ 91,811

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Fair Value Measurements (Details 2) - USD ($)	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale	$ 1,551,238,000	$ 1,654,752,000
Mortgage servicing rights	148,097,000	235,402,000
Derivative financial instruments	20,191,000	13,952,000
States and political subdivisions
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale	399,274,000	410,854,000
Residential mortgage-backed securities
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale	693,225,000	720,563,000
Recurring basis | States and political subdivisions
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale	399,274,000	410,854,000
Recurring basis | Residential mortgage-backed securities
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale	693,225,000	720,563,000
Recurring basis | Mortgage servicing rights
Financial assets and financial liabilities measured at fair value on a recurring basis
Mortgage servicing rights	148,097,000	235,402,000
Recurring basis | Derivative financial instruments
Financial assets and financial liabilities measured at fair value on a recurring basis
Derivative financial instruments	66,410,000	46,388,000
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	858,000	973,000
Derivative financial instruments	8,162,000	5,074,000
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	$ 463,000	463,000
Credit assumption (as a percent)	45.00%
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	$ 395,000	510,000
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	148,097,000	235,402,000
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	$ 8,162,000	$ 5,074,000
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)	9.90%
Discount rate	9.25%
Maturity (months)	327 months
Delinquencies	0.51%
Costs to service	$ 60
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	60.00%
Expected delivery price	1.0021%
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)	16.20%
Discount rate	12.00%
Maturity (months)	357 months
Delinquencies	3.80%
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	1.0895%

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Loans (Details 8) $ in Thousands	Sep. 30, 2015 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	$ 2,681
Extended Maturity And/Or Amortization	601
Delay in Payments or Reduction of Interest Rate	2,985
Total	6,267
Commercial 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	80
Total	80
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	334
Delay in Payments or Reduction of Interest Rate	0
Total	334
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	140
Extended Maturity And/Or Amortization	0
Delay in Payments or Reduction of Interest Rate	0
Total	140
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	75
Total	75
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	2,541
Extended Maturity And/Or Amortization	267
Delay in Payments or Reduction of Interest Rate	2,830
Total	$ 5,638

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Derivative Financial Instruments (Details 2) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Derivative [Line Items]
Financial Assets, Gross Amount Recognized	$ 20,191	$ 13,952
Financial Assets, Gross Amount Offset	0	0
Financial Assets, Net Amount Recognized	20,191	13,952
Financial Liabilities, Gross Amount Recognized	51,562	37,927
Financial Liabilities, Gross Amount Offset	0	0
Financial Liabilities, Net Amount Recognized	51,562	37,927
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	262,009	219,824
Repurchase Agreements, Financial Liabilities, Gross Amount Offset	0	0
Repurchase Agreements, Financial Liabilities, Net Amount Recognized	262,009	219,824
Total Financial Assets, Gross Amount Recognized	20,191	13,952
Total Financial Assets, Gross Amount Offset	0	0
Total Financial Assets, Net Amount Recognized	20,191	13,952
Total Financial Liabilities, Gross Amount Recognized	313,571	257,751
Total Financial Liabilities, Gross Amount Offset	0	0
Total Financial Liabilities, Net Amount Recognized	313,571	257,751
Interest rate swap contracts, caps and floors
Derivative [Line Items]
Financial Assets, Gross Amount Recognized	16,606	10,727
Financial Assets, Gross Amount Offset	0	0
Financial Assets, Net Amount Recognized	16,606	10,727
Financial Liabilities, Gross Amount Recognized	40,509	29,916
Financial Liabilities, Gross Amount Offset	0	0
Financial Liabilities, Net Amount Recognized	40,509	29,916
Foreign exchange contracts
Derivative [Line Items]
Financial Assets, Gross Amount Recognized	3,031	1,525
Financial Assets, Gross Amount Offset	0	0
Financial Assets, Net Amount Recognized	3,031	1,525
Financial Liabilities, Gross Amount Recognized	1,971	709
Financial Liabilities, Gross Amount Offset	0	0
Financial Liabilities, Net Amount Recognized	1,971	709
Mortgage related derivatives
Derivative [Line Items]
Financial Assets, Gross Amount Recognized	554	1,700
Financial Assets, Gross Amount Offset	0	0
Financial Assets, Net Amount Recognized	554	1,700
Financial Liabilities, Gross Amount Recognized	9,082	7,302
Financial Liabilities, Gross Amount Offset	0	0
Financial Liabilities, Net Amount Recognized	$ 9,082	$ 7,302

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Investment Securities (Details 2) $ in Thousands	Sep. 30, 2015 USD ($) Security_Position	Dec. 31, 2014 USD ($) Security_Position
Available for Sale
Less Than 12 Months, Fair Value	$ 193,854	$ 405,448
Less Than 12 Months, Unrealized Losses	(1,260)	(2,756)
12 Months or More, Fair Value	49,181	42,606
12 Months or More, Unrealized Losses	(2,435)	(2,130)
Total Fair Value	243,035	448,054
Total Unrealized Losses	(3,695)	(4,886)
Total
Less Than 12 Months, Fair Value	382,708	434,234
Less Than 12 Months, Unrealized Losses	(3,150)	(2,886)
12 Months or More, Fair Value	55,912	56,844
12 Months or More, Unrealized Losses	(2,598)	(2,382)
Total Fair Value	438,620	491,078
Total Unrealized Losses	$ (5,748)	$ (5,268)
Number of security positions in the investment portfolio in an unrealized loss position | Security_Position	214	168
U.S. Government sponsored agencies and enterprises
Available for Sale
Less Than 12 Months, Fair Value		$ 9,644
Less Than 12 Months, Unrealized Losses		(20)
12 Months or More, Fair Value		0
12 Months or More, Unrealized Losses		0
Total Fair Value		9,644
Total Unrealized Losses		(20)
States and political subdivisions
Available for Sale
Less Than 12 Months, Fair Value	$ 8,600	7,784
Less Than 12 Months, Unrealized Losses	(29)	(21)
12 Months or More, Fair Value	1,454	3,558
12 Months or More, Unrealized Losses	(1)	(47)
Total Fair Value	10,054	11,342
Total Unrealized Losses	(30)	(68)
Held to Maturity
Less Than 12 Months, Fair Value	188,854	28,786
Less Than 12 Months, Unrealized Losses	(1,890)	(130)
12 Months or More, Fair Value	6,731	14,238
12 Months or More, Unrealized Losses	(163)	(252)
Total Fair Value	195,585	43,024
Total Unrealized Losses	(2,053)	(382)
Residential mortgage-backed securities
Available for Sale
Less Than 12 Months, Fair Value	125,856	235,818
Less Than 12 Months, Unrealized Losses	(650)	(1,336)
12 Months or More, Fair Value	38,702	29,373
12 Months or More, Unrealized Losses	(459)	(491)
Total Fair Value	164,558	265,191
Total Unrealized Losses	(1,109)	(1,827)
Commercial mortgage-backed securities
Available for Sale
Less Than 12 Months, Fair Value	11,861	89,509
Less Than 12 Months, Unrealized Losses	(253)	(220)
12 Months or More, Fair Value	0	0
12 Months or More, Unrealized Losses	0	0
Total Fair Value	11,861	89,509
Total Unrealized Losses	(253)	(220)
Corporate bonds
Available for Sale
Less Than 12 Months, Fair Value	47,537	62,693
Less Than 12 Months, Unrealized Losses	(328)	(1,159)
12 Months or More, Fair Value	9,025	9,675
12 Months or More, Unrealized Losses	(1,975)	(1,592)
Total Fair Value	56,562	72,368
Total Unrealized Losses	$ (2,303)	$ (2,751)

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Short-Term Borrowings (Tables)

9 Months Ended

Sep. 30, 2015

Debt Disclosure [Abstract]

Summary of Short-Term Borrowings

Short-term borrowings were as follows as of September 30, 2015 and December 31, 2014 (dollars in thousands):

	September 30, 2015				December 31, 2014
	Weighted Average Interest Rate		Amount		Weighted Average Interest Rate		Amount
Customer repurchase agreements	0.19	%	$	262,009	0.21	%	$	219,824
Federal Home Loan Bank advances	0.17		675,000		0.13		700,000
Federal funds purchased	0.10		3,520		0.14		11,591
Total	0.18	%	$	940,529	0.15	%	$	931,415

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Derivative Financial Instruments (Details 3) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Derivative [Line Items]
Financial Assets, Net Amount Recognized	$ 20,191	$ 13,952
Financial Assets, Financial Instruments	(14,737)	(10,201)
Financial Assets, Collateral	(5,454)	0
Financial Assets, Net Amount	0	3,751
Financial Liabilities, Net Amount Recognized	51,562	37,927
Financial Liabilities, Financial Instruments	(14,737)	(10,200)
Financial Liabilities, Collateral	(35,923)	(26,010)
Financial Liabilities, Net Amount	902	1,717
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	262,009	219,824
Repurchase Agreements, Financial Liabilities, Financial Instruments	0	0
Repurchase Agreements, Financial Liabilities, Financial Instruments	(262,009)	(219,824)
Repurchase Agreements, Financial Liabilities, Collateral	0	0
Total Financial Assets, Net Amount Recognized	20,191	13,952
Total Financial Assets, Financial Instruments	(14,737)	(10,201)
Total Financial Assets, Collateral	(5,454)	0
Total Financial Assets, Net Amount	0	3,751
Total Financial Liabilities, Net Amount Recognized	313,571	257,751
Total Financial Liabilities, Financial Instruments	(14,737)	(10,200)
Total Financial Liabilities, Collateral	(297,932)	(245,834)
Total Financial Liabilities, Net Amount	902	1,717
Counterparty A
Derivative [Line Items]
Financial Assets, Net Amount Recognized	11,420	13
Financial Assets, Financial Instruments	(5,966)	(13)
Financial Assets, Collateral	(5,454)	0
Financial Assets, Net Amount	0	0
Financial Liabilities, Net Amount Recognized	5,966	9,556
Financial Liabilities, Financial Instruments	(5,966)	(13)
Financial Liabilities, Collateral	0	(9,543)
Financial Liabilities, Net Amount	0	0
Counterparty B
Derivative [Line Items]
Financial Assets, Net Amount Recognized	15	145
Financial Assets, Financial Instruments	(15)	(145)
Financial Assets, Collateral	0	0
Financial Assets, Net Amount	0	0
Financial Liabilities, Net Amount Recognized	9,803	3,736
Financial Liabilities, Financial Instruments	(15)	(145)
Financial Liabilities, Collateral	(9,788)	(3,591)
Financial Liabilities, Net Amount	0	0
Counterparty C
Derivative [Line Items]
Financial Assets, Net Amount Recognized	5,948	6,123
Financial Assets, Financial Instruments	(5,948)	(6,123)
Financial Assets, Collateral	0	0
Financial Assets, Net Amount	0	0
Financial Liabilities, Net Amount Recognized	15,275	10,335
Financial Liabilities, Financial Instruments	(5,948)	(6,122)
Financial Liabilities, Collateral	(9,327)	(4,213)
Financial Liabilities, Net Amount	0	0
Other counterparties
Derivative [Line Items]
Financial Assets, Net Amount Recognized	2,808	7,671
Financial Assets, Financial Instruments	(2,808)	(3,920)
Financial Assets, Collateral	0	0
Financial Assets, Net Amount	0	3,751
Financial Liabilities, Net Amount Recognized	20,518	14,300
Financial Liabilities, Financial Instruments	(2,808)	(3,920)
Financial Liabilities, Collateral	(16,808)	(8,663)
Financial Liabilities, Net Amount	$ 902	$ 1,717

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Fair Value Measurements (Details 5) - Nonrecurring basis - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Financial Assets:
Impaired loans	$ 82,275	$ 61,717
Foreclosed assets	43,628	38,619
Significant Unobservable Inputs (Level 3)
Financial Assets:
Impaired loans	82,275	61,717
Foreclosed assets	$ 43,628	$ 38,619
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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Loans (Details 10) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Changes in the accretable yield for purchased credit-impaired loans
Balance at beginning of period		$ 11,456	$ 1,218	$ 7,434	$ 2,337
Purchases		0	5,626	0	5,626
Accretion		(1,794)	2,076	(5,541)	383
Other	[1]	590	931	8,359	1,505
Balance at end of period		$ 10,252	$ 9,851	$ 10,252	$ 9,851

[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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Stock Incentive Plans (Details 2) - USD ($) $ in Millions			9 Months Ended		12 Months Ended
	Aug. 18, 2014	May. 28, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stock-based compensation
Grants beyond threshold limit count numerator			2
Omnibus Incentive Plan
Stock-based compensation
Additional number of share authorized		3,100,000
Total number of shares authorized		11,400,000
Percentage of shares authorized for issuance		10.00%
Vesting period		3 years
Shares available for future grant			5,086,333
Unrecognized compensation cost related to nonvested share-based compensation			$ 22.7
Period for recognition			2 years 4 months 15 days
Employee stock options
Stock-based compensation
Award requisite service period			4 years
Expiration term of options			10 years
Intrinsic value of options exercised			$ 1.3	$ 1.6
Restricted shares
Stock-based compensation
Intrinsic value of restricted shares that vested			$ 11.3	$ 8.4
Restricted shares | Minimum
Stock-based compensation
Vesting period			2 years
Restricted shares | Maximum
Stock-based compensation
Vesting period			4 years
Performance-based restricted stock units
Stock-based compensation
Vesting period			3 years
Restricted stock issued (in shares)			71,560		48,569	56,752	65,333
Performance based restricted units performance period			3 years
Share based compensation restricted stock units multiplier			100.00%
Percent of shares earned			148.00%
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%
Taylor Capital Group, Inc. | Omnibus Incentive Plan
Stock-based compensation
Total number of shares authorized	13,800,000
Increase in amount of shares authorized	2,400,000
Director | Restricted stock
Stock-based compensation
Vesting period			1 year
Maximum percentage of directors fees with option to be received in equity based incentive awards			100.00%
Director | Employee stock options
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

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Preferred Stock (Details)		9 Months Ended	12 Months Ended
	Aug. 18, 2014 shares	Sep. 30, 2015 $ / shares shares	Dec. 31, 2014 $ / shares shares
Equity [Abstract]
Stock conversion	1
Preferred stock, shares outstanding	4,000,000	4,000,000	4,000,000
Preferred stock, liquidation preference per share (in dollars per share) | $ / shares		$ 25	$ 25
Preferred stock, dividend rate, percentage		8.00%	8.00%

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Derivative Financial Instruments (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended		12 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Derivative [Line Items]
Net amount payable under interest rate swap				$ 1		$ 1,100
Interest rate swap credit risk exposure		$ 33,700		33,700
Asset Derivatives, Notional Amount		3,283,068		3,283,068		2,465,120
Asset Derivatives, Estimated Fair Value		66,410		66,410		46,388
Liability Derivatives, Notional Amount		2,454,977		2,454,977		2,964,961
Liability Derivatives, Estimated Fair Value		(53,618)		(53,618)		(40,499)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Amounts of gain or (loss) recognized in income on derivatives		10,123	$ (680)	(668)	$ (559)
Stand-alone derivative instruments
Derivative [Line Items]
Asset Derivatives, Notional Amount	[1]	3,283,068		3,283,068		2,465,120
Asset Derivatives, Estimated Fair Value	[1]	66,410		66,410		46,388
Liability Derivatives, Notional Amount	[1]	2,454,812		2,454,812		2,964,764
Liability Derivatives, Estimated Fair Value	[1]	(53,607)		(53,607)		(40,484)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Amounts of gain or (loss) recognized in income on derivatives		10,121	1,189	(672)	1,312
Commercial loan interest rate swaps
Derivative [Line Items]
Liability Derivatives, Notional Amount		165		165
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]	165		165		197
Liability Derivatives, Estimated Fair Value	[2]	(11)		(11)		(15)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Amounts of gain or (loss) recognized in income on derivatives		2	(1,869)	4	(1,871)
Interest rate swap contracts | Stand-alone derivative instruments
Derivative [Line Items]
Asset Derivatives, Notional Amount	[1]	2,214,393		2,214,393		1,509,930
Asset Derivatives, Estimated Fair Value	[1]	53,421		53,421		37,039
Liability Derivatives, Notional Amount	[1]	1,276,393		1,276,393		2,001,787
Liability Derivatives, Estimated Fair Value	[1]	(40,498)		(40,498)		(30,761)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Amounts of gain or (loss) recognized in income on derivatives		22,862	(312)	8,623	(294)
Interest rate options contracts | Stand-alone derivative instruments
Derivative [Line Items]
Asset Derivatives, Notional Amount	[1]	138,049		138,049		55,830
Asset Derivatives, Estimated Fair Value	[1]	186		186		283
Liability Derivatives, Notional Amount	[1]	138,049		138,049		55,830
Liability Derivatives, Estimated Fair Value	[1]	(186)		(186)		(283)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Amounts of gain or (loss) recognized in income on derivatives		541	0	0	0
Foreign exchange contracts | Stand-alone derivative instruments
Derivative [Line Items]
Asset Derivatives, Notional Amount	[1]	64,368		64,368		27,402
Asset Derivatives, Estimated Fair Value	[1]	4,094		4,094		2,276
Liability Derivatives, Notional Amount	[1]	64,686		64,686		27,002
Liability Derivatives, Estimated Fair Value	[1]	(3,857)		(3,857)		(2,109)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Amounts of gain or (loss) recognized in income on derivatives		(95)	4	91	61
Spot foreign exchange contracts | Stand-alone derivative instruments
Derivative [Line Items]
Asset Derivatives, Notional Amount	[1]	1,096		1,096		512
Asset Derivatives, Estimated Fair Value	[1]	12		12		5
Liability Derivatives, Notional Amount	[1]	684		684		304
Liability Derivatives, Estimated Fair Value	[1]	(3)		(3)		(18)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Amounts of gain or (loss) recognized in income on derivatives		(4)	(17)	22	(9)
Mortgage related derivatives | Stand-alone derivative instruments
Derivative [Line Items]
Asset Derivatives, Notional Amount	[1]	865,162		865,162		871,446
Asset Derivatives, Estimated Fair Value	[1]	8,697		8,697		6,785
Liability Derivatives, Notional Amount	[1]	975,000		975,000		879,841
Liability Derivatives, Estimated Fair Value	[1]	(9,063)		(9,063)		$ (7,313)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Amounts of gain or (loss) recognized in income on derivatives		$ (13,183)	$ 1,514	$ (9,408)	$ 1,554

[1] These stand-alone derivative instruments are not designated as hedging instruments under ASC Topic 815.

[2] Hedged fixed-rate commercial real estate loans

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Fair Value Measurements (Details 3) - Mortgage servicing rights	9 Months Ended
	Sep. 30, 2015 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	$ (6,402,000)
Impact on fair value of 20% adverse change	(12,278,000)
Impact on fair value of 10% adverse change	(4,917,000)
Impact on fair value of 20% adverse change	(9,521,000)
Impact on fair value of 10% adverse change	(811,000)
Impact on fair value of 20% adverse change	(1,772,000)
Impact on fair value of 10% adverse change	(2,563,000)
Impact on fair value of 20% adverse change	$ (5,126,000)
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	13.60%
Weighted average discount rate	9.56%
Weighted average delinquency rate	1.84%
Weighted average costs to service	$ 81

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Preferred Stock

9 Months Ended

Sep. 30, 2015

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.

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Loans (Details 3) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Loans
Total loans, excluding purchased credit impaired loans	$ 9,233,488	$ 8,831,572
Substandard and doubtful loans non-performing	56,100	49,100
Commercial loans
Loans
Total loans, excluding purchased credit impaired loans	3,440,632	3,245,206
Commercial loans collateralized by assignment of lease payments
Loans
Total loans, excluding purchased credit impaired loans	1,693,540	1,692,258
Healthcare
Loans
Total loans, excluding purchased credit impaired loans	400,856	342,984
Industrial
Loans
Total loans, excluding purchased credit impaired loans	369,389	338,033
Multifamily
Loans
Total loans, excluding purchased credit impaired loans	387,390	420,398
Retail
Loans
Total loans, excluding purchased credit impaired loans	431,202	438,176
Office
Loans
Total loans, excluding purchased credit impaired loans	217,421	246,293
Other
Loans
Total loans, excluding purchased credit impaired loans	773,751	758,983
Construction real estate
Loans
Total loans, excluding purchased credit impaired loans	255,620	247,068
Pass
Loans
Total loans, excluding purchased credit impaired loans	7,569,063	7,390,916
Pass | Commercial loans
Loans
Total loans, excluding purchased credit impaired loans	3,160,263	3,036,069
Pass | Commercial loans collateralized by assignment of lease payments
Loans
Total loans, excluding purchased credit impaired loans	1,681,021	1,680,736
Pass | Healthcare
Loans
Total loans, excluding purchased credit impaired loans	396,511	338,622
Pass | Industrial
Loans
Total loans, excluding purchased credit impaired loans	350,058	314,225
Pass | Multifamily
Loans
Total loans, excluding purchased credit impaired loans	381,766	412,824
Pass | Retail
Loans
Total loans, excluding purchased credit impaired loans	420,428	423,842
Pass | Office
Loans
Total loans, excluding purchased credit impaired loans	198,930	229,947
Pass | Other
Loans
Total loans, excluding purchased credit impaired loans	724,466	708,447
Pass | Construction real estate
Loans
Total loans, excluding purchased credit impaired loans	255,620	246,204
Special Mention
Loans
Total loans, excluding purchased credit impaired loans	221,676	233,740
Special Mention | Commercial loans
Loans
Total loans, excluding purchased credit impaired loans	167,652	178,984
Special Mention | Commercial loans collateralized by assignment of lease payments
Loans
Total loans, excluding purchased credit impaired loans	3,098	6,853
Special Mention | Healthcare
Loans
Total loans, excluding purchased credit impaired loans	4,345	4,362
Special Mention | Industrial
Loans
Total loans, excluding purchased credit impaired loans	17,498	8,817
Special Mention | Multifamily
Loans
Total loans, excluding purchased credit impaired loans	737	920
Special Mention | Retail
Loans
Total loans, excluding purchased credit impaired loans	5,930	2,740
Special Mention | Office
Loans
Total loans, excluding purchased credit impaired loans	9,520	8,524
Special Mention | Other
Loans
Total loans, excluding purchased credit impaired loans	12,896	22,013
Special Mention | Construction real estate
Loans
Total loans, excluding purchased credit impaired loans	0	527
Substandard
Loans
Total loans, excluding purchased credit impaired loans	179,062	104,743
Substandard | Commercial loans
Loans
Total loans, excluding purchased credit impaired loans	112,717	30,153
Substandard | Commercial loans collateralized by assignment of lease payments
Loans
Total loans, excluding purchased credit impaired loans	9,421	4,669
Substandard | Healthcare
Loans
Total loans, excluding purchased credit impaired loans	0	0
Substandard | Industrial
Loans
Total loans, excluding purchased credit impaired loans	1,833	14,991
Substandard | Multifamily
Loans
Total loans, excluding purchased credit impaired loans	4,887	6,654
Substandard | Retail
Loans
Total loans, excluding purchased credit impaired loans	4,844	11,594
Substandard | Office
Loans
Total loans, excluding purchased credit impaired loans	8,971	7,822
Substandard | Other
Loans
Total loans, excluding purchased credit impaired loans	36,389	28,523
Substandard | Construction real estate
Loans
Total loans, excluding purchased credit impaired loans	0	337
Doubtful
Loans
Total loans, excluding purchased credit impaired loans	0	0
Doubtful | Commercial loans
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	7,969,801	7,729,399
Total | Commercial loans
Loans
Total loans, excluding purchased credit impaired loans	3,440,632	3,245,206
Total | Commercial loans collateralized by assignment of lease payments
Loans
Total loans, excluding purchased credit impaired loans	1,693,540	1,692,258
Total | Healthcare
Loans
Total loans, excluding purchased credit impaired loans	400,856	342,984
Total | Industrial
Loans
Total loans, excluding purchased credit impaired loans	369,389	338,033
Total | Multifamily
Loans
Total loans, excluding purchased credit impaired loans	387,390	420,398
Total | Retail
Loans
Total loans, excluding purchased credit impaired loans	431,202	438,176
Total | Office
Loans
Total loans, excluding purchased credit impaired loans	217,421	246,293
Total | Other
Loans
Total loans, excluding purchased credit impaired loans	773,751	758,983
Total | Construction real estate
Loans
Total loans, excluding purchased credit impaired loans	$ 255,620	$ 247,068

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Business Combination (Details 2) - USD ($) $ / shares in Units, $ in Thousands	Aug. 18, 2014	Aug. 15, 2014	Sep. 30, 2015	Dec. 31, 2014
ASSETS
Goodwill			$ 711,521	$ 711,521
LIABILITIES
Series A preferred stock at $28.82 per share at August 15, 2014			$ 115,280	$ 115,280
Consideration excluding Series A preferred stock:
Preferred stock, stated value per share			$ 0.01	$ 0.01
Taylor Capital Group, Inc.
ASSETS
Cash and cash equivalents	$ 154,684
Investment securities available for sale	826,691
Investment securities held to maturity	22,599
Non-marketable securities - FRB and FHLB Stock	50,620
Loans held for sale	670,671
Loans	3,532,211
Leases investments	11,885
Premises and equipment	19,701
Goodwill	288,152
Core deposit intangible	20,079
Mortgage servicing rights	224,453
Other real estate owned	4,720
Other assets	130,478
Total assets	5,956,944
LIABILITIES
Deposits	3,953,213
Short-term borrowings	1,035,800
Junior subordinated notes issued to capital trusts	80,843
Accrued expenses and other liabilities	123,028
Total liabilities	5,192,884
Total identifiable net assets less Series A preferred stock	648,780
Consideration excluding Series A preferred stock:
Market value of common stock at $26.49 per share at August 15, 2014 (19,602,482 shares of common stock issued)	519,270
Cash paid	129,510
Total fair value of consideration, excluding Series A preferred stock	648,780
Taylor Capital Group, Inc. | Series A Preferred Stock
LIABILITIES
Series A preferred stock at $28.82 per share at August 15, 2014	$ 115,280
Consideration excluding Series A preferred stock:
Preferred stock, stated value per share		$ 28.82
Common Stock | Taylor Capital Group, Inc.
Consideration excluding Series A preferred stock:
Share price		$ 26.49
Number of shares issued	19,600,000	19,602,482

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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, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Impact of the share-based payment plans in the financial statements
Total cost of share-based payment plans during the period	$ 3,508	$ 2,338	$ 10,983	$ 6,593
Amount of related income tax benefit recognized in income	$ 1,367	$ 922	$ 4,288	$ 2,592
Employee stock options
Number of Options
Outstanding, beginning balance (in shares)			2,250,714
Granted (in shares)			322,899
Exercised (in shares)			(122,584)
Expired or cancelled (in shares)			(173,977)
Forfeited (in shares)			(11,671)
Outstanding, ending balance (in shares)	2,265,381		2,265,381		2,250,714
Options exercisable (in shares)	1,735,603		1,735,603
Weighted Average Exercise Price
Outstanding, beginning balance (in dollars per share)			$ 27.94
Granted (in dollars per share)			31.45
Exercised (in dollars per share)			22.03
Expired or Cancelled (in dollars per share)			41.12
Forfeited (in dollars per share)			26.77
Outstanding, ending balance (in dollars per share)	$ 27.75		27.75		$ 27.94
Options exercisable (in dollars per share)	$ 27.25		$ 27.25
Weighted Average Remaining Contractual Term (In Years)
Outstanding, beginning balance (in years)			4 years 7 months 28 days		4 years 4 months 20 days
Outstanding, ending balance (in years)			4 years 7 months 28 days		4 years 4 months 20 days
Options exercisable (in years)			3 years 5 months 3 days
Aggregate Intrinsic Value (in thousands)
Options outstanding	$ 12,467		$ 12,467
Options exercisable	$ 10,740		$ 10,740
Fair value assumptions
Risk-free interest rate			1.68%
Expected volatility of Company’s stock			29.76%
Expected dividend yield			1.81%
Expected life of options			5 years 9 months
Weighted average fair value per option of options granted during the year			$ 7.84
Restricted shares
Number of Shares and Units
Shares Outstanding, Beginning balance (in shares)			801,085
Granted (in shares)			523,744
Vested (in shares)			(350,382)
Forfeited (in shares)			(13,939)
Shares Outstanding, Ending balance (in shares)	960,508		960,508		801,085
Weighted Average Grant Date Fair Value
Shares Outstanding, Beginning balance (in dollars per share)			$ 26.99
Granted (in dollars per share)			31.08
Vested (in dollars per share)			25.05
Forfeited (in dollars per share)			28.46
Shares Outstanding, Ending balance (in dollars per share)	$ 29.90		$ 29.90		$ 26.99

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Stock Incentive Plans (Tables)

9 Months Ended

Sep. 30, 2015

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

Schedule of Compensation Cost for Share-Based Payment Arrangements, Allocation of Share-Based Compensation Costs by Plan

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,
	2015		2014		2015		2014
Total cost of share-based payment plans during the period	$	3,508	$	2,338	$	10,983	$	6,593
Amount of related income tax benefit recognized in income	1,367		922		4,288		$	2,592

Schedule of Share-Based Compensation, Stock Options, Activity

The following table summarizes stock options outstanding for the nine months endedSeptember 30, 2015:

	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, 2014	2,250,714		$	27.94	4.39
Granted	322,899		31.45
Exercised	(122,584	)	22.03
Expired or cancelled	(173,977	)	41.12
Forfeited	(11,671	)	26.77
Options outstanding as of September 30, 2015	2,265,381		$	27.75	4.66	$	12,467
Options exercisable as of September 30, 2015	1,735,603		$	27.25	3.42	$	10,740

Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions

 The following assumptions were used for options granted during the nine months endedSeptember 30, 2015:

	September 30, 2015
Risk-free interest rate	1.68		%
Expected volatility of Company’s stock	29.76		%
Expected dividend yield	1.81		%
Expected life of options	5.8 years
Weighted average fair value per option of options granted during the year	$	7.84

Schedule of Share-Based Compensation, Restricted Stock and Restricted Stock Units Activity

The following is a summary of changes in restricted shares and units for the nine months endedSeptember 30, 2015:

	Number of Shares and Units		Weighted Average Grant Date Fair Value
Shares Outstanding at December 31, 2014	801,085		$	26.99
Granted	523,744		31.08
Vested	(350,382	)	25.05
Forfeited	(13,939	)	28.46
Shares Outstanding at September 30, 2015	960,508		$	29.90

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Loans (Details 5) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2015 USD ($) loan	Sep. 30, 2015 USD ($) loan	Dec. 31, 2014 USD ($) loan
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	$ 125,078	$ 125,078	$ 113,336
Recorded Investment	116,287	116,287	101,532
Partial Charge-offs	8,791	8,791	11,804
Allowance for Loan Losses Allocated	19,004	19,004	10,482
Average Recorded Investment	117,324	103,571	126,665
Interest Income Recognized	18	185	$ 407
Restructured loans	$ 6,267	$ 6,267
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	$ 1,000	$ 1,000	$ 1,000
Commercial loans
Loans individually evaluated for impairment by class of loans
Restructured loans	80	80
Multifamily
Loans individually evaluated for impairment by class of loans
Restructured loans	334	334
Residential real estate
Loans individually evaluated for impairment by class of loans
Restructured loans	140	140
Indirect vehicle
Loans individually evaluated for impairment by class of loans
Restructured loans	75	75
Home equity lines
Loans individually evaluated for impairment by class of loans
Restructured loans	5,638	5,638
Impaired Financing Receivable With No Allowance | Commercial loans
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	7,080	7,080	9,752
Recorded Investment	7,080	7,080	8,992
Partial Charge-offs	0	0	760
Allowance for Loan Losses Allocated	0	0	0
Average Recorded Investment	4,009	7,254	10,324
Interest Income Recognized	0	0	0
Impaired Financing Receivable With No Allowance | Commercial loans collateralized by assignment of lease payments
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	0	0	2,316
Recorded Investment	0	0	2,316
Partial Charge-offs	0	0	0
Allowance for Loan Losses Allocated	0	0	0
Average Recorded Investment	0	1,495	2,569
Interest Income Recognized	0	47	121
Impaired Financing Receivable With No Allowance | Healthcare
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
Impaired Financing Receivable With No Allowance | Industrial
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	3,053	3,053	9,115
Recorded Investment	3,053	3,053	5,858
Partial Charge-offs	0	0	3,257
Allowance for Loan Losses Allocated	0	0	0
Average Recorded Investment	3,232	4,923	7,870
Interest Income Recognized	0	0	0
Impaired Financing Receivable With No Allowance | Multifamily
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	1,754	1,754	1,733
Recorded Investment	1,754	1,754	1,733
Partial Charge-offs	0	0	0
Allowance for Loan Losses Allocated	0	0	0
Average Recorded Investment	1,874	1,859	1,928
Interest Income Recognized	0	17	52
Impaired Financing Receivable With No Allowance | Retail
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	5,072	5,072	2,025
Recorded Investment	2,119	2,119	813
Partial Charge-offs	2,953	2,953	1,212
Allowance for Loan Losses Allocated	0	0	0
Average Recorded Investment	3,342	824	3,465
Interest Income Recognized	0	0	0
Impaired Financing Receivable With No Allowance | Office
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	2,379	2,379	0
Recorded Investment	1,802	1,802	0
Partial Charge-offs	577	577	0
Allowance for Loan Losses Allocated	0	0	0
Average Recorded Investment	2,396	1,318	1,127
Interest Income Recognized	0	0	0
Impaired Financing Receivable With No Allowance | Other
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	811	811	1,479
Recorded Investment	800	800	1,465
Partial Charge-offs	11	11	14
Allowance for Loan Losses Allocated	0	0	0
Average Recorded Investment	849	1,514	5,249
Interest Income Recognized	0	0	0
Impaired Financing Receivable With No Allowance | Residential real estate
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	970	970	1,941
Recorded Investment	970	970	1,941
Partial Charge-offs	0	0	0
Allowance for Loan Losses Allocated	0	0	0
Average Recorded Investment	949	482	2,740
Interest Income Recognized	0	0	0
Impaired Financing Receivable With No Allowance | Construction real estate
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	34
Interest Income Recognized	0	0	0
Impaired Financing Receivable With No Allowance | Indirect vehicle
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
Impaired Financing Receivable With No Allowance | Home equity lines
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	1,327	1,327	577
Recorded Investment	927	927	577
Partial Charge-offs	400	400	0
Allowance for Loan Losses Allocated	0	0	0
Average Recorded Investment	1,327	667	762
Interest Income Recognized	0	0	0
Impaired Financing Receivable With No Allowance | Other consumer
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
Impaired Financing Receivable With Allowance | Commercial loans
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	29,245	29,245	7,987
Recorded Investment	29,245	29,245	7,987
Partial Charge-offs	0	0	0
Allowance for Loan Losses Allocated	7,943	7,943	2,395
Average Recorded Investment	30,590	9,500	14,227
Interest Income Recognized	0	0	0
Impaired Financing Receivable With Allowance | Commercial loans collateralized by assignment of lease payments
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	7,208	7,208	715
Recorded Investment	6,724	6,724	715
Partial Charge-offs	484	484	0
Allowance for Loan Losses Allocated	2,618	2,618	105
Average Recorded Investment	6,982	3,728	1,515
Interest Income Recognized	18	94	91
Impaired Financing Receivable With Allowance | Healthcare
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
Impaired Financing Receivable With Allowance | Industrial
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	820	820	517
Recorded Investment	793	793	513
Partial Charge-offs	27	27	4
Allowance for Loan Losses Allocated	22	22	130
Average Recorded Investment	839	33	4,982
Interest Income Recognized	0	0	0
Impaired Financing Receivable With Allowance | Multifamily
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	1,037	1,037	5,680
Recorded Investment	1,037	1,037	4,709
Partial Charge-offs	0	0	971
Allowance for Loan Losses Allocated	78	78	996
Average Recorded Investment	1,148	4,856	6,354
Interest Income Recognized	0	27	131
Impaired Financing Receivable With Allowance | Retail
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	4,790	4,790	9,264
Recorded Investment	4,790	4,790	7,897
Partial Charge-offs	0	0	1,367
Allowance for Loan Losses Allocated	1,326	1,326	720
Average Recorded Investment	4,046	7,433	8,547
Interest Income Recognized	0	0	0
Impaired Financing Receivable With Allowance | Office
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	2,174	2,174	4,528
Recorded Investment	2,174	2,174	2,986
Partial Charge-offs	0	0	1,542
Allowance for Loan Losses Allocated	1,697	1,697	545
Average Recorded Investment	2,215	2,297	2,833
Interest Income Recognized	0	0	0
Impaired Financing Receivable With Allowance | Other
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	11,032	11,032	12,612
Recorded Investment	11,032	11,032	12,527
Partial Charge-offs	0	0	85
Allowance for Loan Losses Allocated	0	0	136
Average Recorded Investment	12,007	13,265	11,022
Interest Income Recognized	0	0	12
Impaired Financing Receivable With Allowance | Residential real estate
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	15,215	15,215	14,234
Recorded Investment	13,263	13,263	14,234
Partial Charge-offs	1,952	1,952	0
Allowance for Loan Losses Allocated	2,834	2,834	3,126
Average Recorded Investment	12,867	14,083	14,632
Interest Income Recognized	0	0	0
Impaired Financing Receivable With Allowance | Construction real estate
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	0	0	2,707
Recorded Investment	0	0	337
Partial Charge-offs	0	0	2,370
Allowance for Loan Losses Allocated	0	0	162
Average Recorded Investment	0	431	455
Interest Income Recognized	0	0	0
Impaired Financing Receivable With Allowance | Indirect vehicle
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	215	215	227
Recorded Investment	131	131	227
Partial Charge-offs	84	84	0
Allowance for Loan Losses Allocated	8	8	14
Average Recorded Investment	272	310	358
Interest Income Recognized	0	0	0
Impaired Financing Receivable With Allowance | Home equity lines
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	30,896	30,896	25,927
Recorded Investment	28,593	28,593	25,705
Partial Charge-offs	2,303	2,303	222
Allowance for Loan Losses Allocated	2,478	2,478	2,153
Average Recorded Investment	28,380	27,299	25,672
Interest Income Recognized	0	0	0
Impaired Financing Receivable With Allowance | Other consumer
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	20,100	20,100	15,600
Non-performing loan aging
Loans individually evaluated for impairment by class of loans
Restructured loans	$ 21,400	$ 21,400	$ 25,800

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Commitments and Contingencies (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Commitments [Abstract]
Maximum maturity period for letters of credit (in years)	5 years
Decrease in maximum potential amount of future payments under letters of credit	$ (187)
Dollar amount of letters of credit outstanding	134,000	$ 134,200
Letters of credit issued or renewed	83,800
Capital expenditure commitments outstanding	4,100
Home equity lines
Commitments and contingencies
Dollar amount of line of credit outstanding	194,644	221,102
Other commitments
Commitments and contingencies
Dollar amount of line of credit outstanding	3,028,042	2,643,220
Standby
Commitments and contingencies
Dollar amount of line of credit outstanding	132,277	131,810
Commercial
Commitments and contingencies
Dollar amount of line of credit outstanding	$ 1,747	$ 2,401

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Goodwill and Intangibles (Details 3) $ in Thousands	Sep. 30, 2015 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2015	$ 1,546
2016	5,523
2017	4,943
2018	4,526
2019	3,040
Thereafter	17,942
Total estimated future amortization expense	$ 37,520

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Investment Securities (Details 3) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Amortized cost and fair value of investment securities by contractual maturity
Realized gains	$ 371	$ 921	$ 1,454	$ 1,246
Realized losses	0	(4,167)	(1,627)	(4,170)
Impairment charges	0	0	0	(92)
Net gains (losses)	371	$ (3,246)	(173)	$ (3,016)
Amortized Cost, Available for sale
Due in one year or less	19,082		19,082
Due after one year through five years	292,719		292,719
Due after five years through ten years	37,547		37,547
Due after ten years	322,386		322,386
Amortized Cost	1,517,226		1,517,226		$ 1,624,268
Fair Value, Available for sale
Due in one year or less	19,156		19,156
Due after one year through five years	294,245		294,245
Due after five years through ten years	39,016		39,016
Due after ten years	340,569		340,569
Fair Value	1,551,238		1,551,238		1,654,752
Amortized Cost, Held to maturity
Due in one year or less	72,969		72,969
Due after one year through five years	202,217		202,217
Due after five years through ten years	101,102		101,102
Due after ten years	626,675		626,675
Investment securities held to maturity	1,224,852		1,224,852		993,380
Fair value, Held to maturity
Due in one year or less	73,139		73,139
Due after one year through five years	204,617		204,617
Due after five years through ten years	105,490		105,490
Due after ten years	647,762		647,762
Fair Value	1,263,212		1,263,212		1,035,061
Total Available for Sale and Held to Maturity Investment Securities
Amortized Cost	2,742,078		2,742,078		2,617,648
Fair Value	2,814,450		2,814,450		2,689,813
Pledged financial instruments, not separately reported, securities	1,400,000		1,400,000		1,500,000
Pledged financial instruments, not separately reported, securities required to be pledged	1,100,000		1,100,000		980,400
Investment securities pledged as collateral for long-term Federal Home Loan Bank advances	111,100		111,100		226,900
Equity securities
Amortized Cost, Available for sale
Amortized Cost	10,701		10,701		10,531
Fair Value, Available for sale
Fair Value	10,826		10,826		10,597
Residential and commercial mortgage-backed securities
Amortized Cost, Available for sale
Amortized Cost	834,791		834,791
Fair Value, Available for sale
Fair Value	847,426		847,426
Residential mortgage-backed securities
Amortized Cost, Available for sale
Amortized Cost	683,955		683,955		713,413
Fair Value, Available for sale
Fair Value	693,225		693,225		720,563
Amortized Cost, Held to maturity
Investment securities held to maturity	221,889		221,889		240,822
Fair value, Held to maturity
Fair Value	$ 232,204		$ 232,204		$ 252,796

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Basis of Presentation

9 Months Ended

Sep. 30, 2015

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 position, results of operations and cash flows for the interim periods have been made. The results of operations for the three and nine months endedSeptember 30, 2015 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, 2014.

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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Deposits (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Banking and Thrift [Abstract]
Demand deposit accounts, noninterest bearing	$ 4,434,067	$ 4,118,256
NOW and money market accounts	4,129,414	3,913,765
Savings accounts	953,746	940,345
Certificates of deposit, $250,000 or more	811,850	838,928
Other certificates of deposit	925,501	1,179,648
Total deposits	11,254,578	10,990,942
Brokered deposits	$ 444,900	$ 485,300

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Business Combination (Details 3) - Taylor Capital Group, Inc. $ in Thousands	Aug. 18, 2014 USD ($)
Business Combination, Acquired Receivables [Abstract]
Fair value of acquired loans	$ 3,532,211
PCI Loans
Business Combination, Acquired Receivables [Abstract]
Contractually required principal and interest payments	244,650
Nonaccretable difference	(34,219)
Cash flows expected to be collected	210,431
Accretable difference	(5,626)
Fair value of acquired loans	204,805
Non-PCI Loans
Business Combination, Acquired Receivables [Abstract]
Contractually required principal and interest payments	3,707,463
Contractually required interest payments not expected to be collected due to estimated prepayments	(302,329)
Cash flows expected to be collected	3,405,134
Accretable difference	(77,728)
Fair value of acquired loans	$ 3,327,406

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Investment Securities (Tables)

9 Months Ended

Sep. 30, 2015

Investments, Debt and Equity Securities [Abstract]

Summary of Investment Holdings

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, 2015
Available for Sale
U.S. Government sponsored agencies and enterprises	$	64,008	$	1,453	$	—		$	65,461
States and political subdivisions	379,015		20,289		(30		)	399,274
Residential mortgage-backed securities	683,955		10,379		(1,109		)	693,225
Commercial mortgage-backed securities	150,836		3,618		(253		)	154,201
Corporate bonds	228,711		1,843		(2,303		)	228,251
Equity securities	10,701		125		—			10,826
Total Available for Sale	1,517,226		37,707		(3,695		)	1,551,238
Held to Maturity
States and political subdivisions	1,002,963		30,098		(2,053		)	1,031,008
Residential mortgage-backed securities	221,889		10,315		—			232,204
Total Held to Maturity	1,224,852		40,413		(2,053		)	1,263,212
Total	$	2,742,078	$	78,120	$	(5,748	)	$	2,814,450
December 31, 2014
Available for Sale
U.S. Government sponsored agencies and enterprises	$	64,612	$	1,281	$	(20	)	$	65,873
States and political subdivisions	390,076		20,846		(68		)	410,854
Residential mortgage-backed securities	713,413		8,977		(1,827		)	720,563
Commercial mortgage-backed securities	186,110		1,772		(220		)	187,662
Corporate bonds	259,526		2,428		(2,751		)	259,203
Equity securities	10,531		66		—			10,597
Total Available for Sale	1,624,268		35,370		(4,886		)	1,654,752
Held to Maturity
States and political subdivisions	752,558		30,089		(382		)	782,265
Residential mortgage-backed securities	240,822		11,974		—			252,796
Total Held to Maturity	993,380		42,063		(382		)	1,035,061
Total	$	2,617,648	$	77,433	$	(5,268	)	$	2,689,813

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, 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	$	8,600	$	(29	)	$	1,454	$	(1	)	$	10,054	$	(30	)
Residential mortgage-backed securities	125,856		(650		)	38,702		(459		)	164,558		(1,109		)
Commercial mortgage-backed securities	11,861		(253		)	—		—			11,861		(253		)
Corporate bonds	47,537		(328		)	9,025		(1,975		)	56,562		(2,303		)
Total Available for Sale	193,854		(1,260		)	49,181		(2,435		)	243,035		(3,695		)
Held to Maturity
States and political subdivisions	188,854		(1,890		)	6,731		(163		)	195,585		(2,053		)
Total	$	382,708	$	(3,150	)	$	55,912	$	(2,598	)	$	438,620	$	(5,748	)

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, 2014 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
U.S. Government sponsored agencies and enterprises	$	9,644	$	(20	)	$	—	$	—		$	9,644	$	(20	)
States and political subdivisions	7,784		(21		)	3,558		(47		)	11,342		(68		)
Residential mortgage-backed securities	235,818		(1,336		)	29,373		(491		)	265,191		(1,827		)
Commercial mortgage-backed securities	89,509		(220		)	—		—			89,509		(220		)
Corporate bonds	62,693		(1,159		)	9,675		(1,592		)	72,368		(2,751		)
Total Available for Sale	405,448		(2,756		)	42,606		(2,130		)	448,054		(4,886		)
Held to Maturity
States and political subdivisions	28,786		(130		)	14,238		(252		)	43,024		(382		)
Total	$	434,234	$	(2,886	)	$	56,844	$	(2,382	)	$	491,078	$	(5,268	)

Summary of Realized Gains on the Sale of 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,
	2015		2014			2015			2014
Realized gains	$	371	$	921		$	1,454		$	1,246
Realized losses	—		(4,167		)	(1,627		)	(4,170		)
Impairment charges	—		—			—			(92		)
Net gains (losses)	$	371	$	(3,246	)	$	(173	)	$	(3,016	)

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, 2015 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	$	19,082	$	19,156
Due after one year through five years	292,719		294,245
Due after five years through ten years	37,547		39,016
Due after ten years	322,386		340,569
Equity securities	10,701		10,826
Residential and commercial mortgage-backed securities	834,791		847,426
	1,517,226		1,551,238
Held to maturity:
Due in one year or less	72,969		73,139
Due after one year through five years	202,217		204,617
Due after five years through ten years	101,102		105,490
Due after ten years	626,675		647,762
Residential mortgage-backed securities	221,889		232,204
	1,224,852		1,263,212
Total	$	2,742,078	$	2,814,450

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Business Combination (Tables)

9 Months Ended

Sep. 30, 2015

Business Combinations [Abstract]

Schedule of Estimated Fair Values of the Assets Acquired and Liabilities Assumed in Business Acquisition

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

	PCI Loans			Non-PCI Loans
Contractually required principal and interest payments	$	244,650		$	3,707,463
Contractually required interest payments not expected to be collected due to estimated prepayments	—			(302,329		)
Nonaccretable difference	(34,219		)	—
Cash flows expected to be collected	210,431			3,405,134
Accretable difference	(5,626		)	(77,728		)
Fair value of acquired loans	$	204,805		$	3,327,406

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

	August 18,
	2014
ASSETS
Cash and cash equivalents	$	154,684
Investment securities available for sale	826,691
Investment securities held to maturity	22,599
Non-marketable securities - FRB and FHLB Stock	50,620
Loans held for sale	670,671
Loans	3,532,211
Leases investments	11,885
Premises and equipment	19,701
Goodwill	288,152
Core deposit intangible	20,079
Mortgage servicing rights	224,453
Other real estate owned	4,720
Other assets	130,478
Total assets	$	5,956,944
LIABILITIES
Deposits	$	3,953,213
Short-term borrowings	1,035,800
Junior subordinated notes issued to capital trusts	80,843
Accrued expenses and other liabilities	123,028
Total liabilities	$	5,192,884
Series A preferred stock at $28.82 per share at August 15, 2014	$	115,280
Total identifiable net assets less Series A preferred stock	$	648,780
Consideration excluding Series A preferred stock:
Market value of common stock at $26.49 per share at August 15, 2014 (19,602,482 shares of common stock issued)	$	519,270
Cash paid	129,510
Total fair value of consideration, excluding Series A preferred stock	$	648,780

Business Acquisition, Pro Forma Information

The following table provides the unaudited pro forma information for the results of operations for the three and nine months endedSeptember 30, 2014, as if the acquisition had occurred January 1, 2014. The pro forma results combine the historical results of Taylor Capital into the Company's consolidated statement of operations including the impact of certain purchase 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, 2014. 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. Net income in the table below includes merger related expenses.

	Pro Forma
	Three Months Ended		Nine Months Ended
	September 30, 2014		September 30, 2014
(in thousands)
Total revenues (net interest income plus non-interest income)	$	199,207	$	583,483
Net income	11,156		77,527

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Loans (Details 9) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) Pools_of_purchased_loans	Sep. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Allowance for credit losses [Roll Forward]
Beginning balance				$ 110,026
Ending balance		$ 124,626		124,626
Ending allowance balance attributable to loans:
Acquired and accounted for under ASC 310-30	[1]	1,830	$ 1,246	1,830	$ 1,246
Unfunded Commitments
Allowance for unfunded credit commitments, beginning balance		4,060	2,995	4,031	1,716
Allowance for unfunded credit commitments acquired through business combination			1,261		1,261
Allowance for unfunded credit commitments, utilization			(637)		(637)
Allowance for unfunded commitments, Provision		(648)	483	(619)	1,762
Allowance for unfunded credit commitments, ending balance		3,412	4,102	3,412	4,102
Individually evaluated for impairment for unfunded commitments		1,388	1,316	1,388	1,316
Unfunded commitments collectively evaluated for impairment		2,024	2,786	2,024	2,786
Allowance for credit losses
Allowance for credit losses, beginning balance		124,130	103,905	114,057	113,462
Allowance for loan losses and unfunded commitments, allowance for unfunded credit commitments acquired through business combination			1,261		1,261
Allowance for loan losses and unfunded commitments, utilization			(637)		(637)
Allowance for loan losses and unfunded commitments charge offs		5,510	4,484	12,426	18,735
Allowance for loan losses and unfunded commitments recoveries		4,060	3,758	11,779	9,252
Allowance for loan losses and unfunded commitments provision		5,358	3,109	14,628	2,309
Allowance for credit losses, ending balance		128,038	106,912	128,038	106,912
Allowance for credit losses, individually evaluated for impairment		20,392	12,031	20,392	12,031
Allowance for credit losses, collectively evaluated for impairment		105,816	93,635	105,816	93,635
Acquired and accounted for under ASC 310-30	[1]	1,830	1,246	1,830	1,246
Loans:
Individually evaluated for impairment		116,287	116,060	116,287	116,060
Collectively evaluated for impairment		9,117,201	8,571,678	9,117,201	8,571,678
Acquired and accounted for under ASC 310-30	[1]	155,693	288,186	155,693	288,186
Total loans		9,389,181	8,975,924	9,389,181	8,975,924	$ 9,083,217
Commercial loans
Allowance for credit losses [Roll Forward]
Beginning balance		39,142	23,154	29,571	23,461
Charge-offs		1,657	606	2,283	1,142
Recoveries		456	564	1,514	2,888
Provision		5,044	2,181	14,183	86
Ending balance		42,985	25,293	42,985	25,293
Ending allowance balance attributable to loans:
Individually evaluated for impairment		7,943	2,250	7,943	2,250
Collectively evaluated for impairment		34,731	22,433	34,731	22,433
Acquired and accounted for under ASC 310-30	[1]	311	610	311	610
Allowance for credit losses
Acquired and accounted for under ASC 310-30	[1]	311	610	311	610
Loans:
Individually evaluated for impairment		36,325	18,850	36,325	18,850
Collectively evaluated for impairment		3,404,307	3,045,819	3,404,307	3,045,819
Acquired and accounted for under ASC 310-30	[1]	37,189	121,565	37,189	121,565
Total loans		3,477,821	3,186,234	3,477,821	3,186,234
Commercial loans collateralized by assignment of lease payments
Allowance for credit losses [Roll Forward]
Beginning balance		11,268	9,425	9,962	9,159
Charge-offs		1,980		2,080	40
Recoveries		11	425	1,100	555
Provision		985	(484)	1,302	(308)
Ending balance		10,284	9,366	10,284	9,366
Ending allowance balance attributable to loans:
Individually evaluated for impairment		2,618	238	2,618	238
Collectively evaluated for impairment		7,666	9,128	7,666	9,128
Loans:
Individually evaluated for impairment		6,724	6,211	6,724	6,211
Collectively evaluated for impairment		1,686,816	1,625,449	1,686,816	1,625,449
Total loans		1,693,540	1,631,660	1,693,540	1,631,660
Commercial real estate
Allowance for credit losses [Roll Forward]
Beginning balance		38,076	43,933	41,826	51,628
Charge-offs		170	1,027	2,312	9,910
Recoveries		2,402	2,227	6,338	3,279
Provision		1,216	(4,193)	(4,328)	(4,057)
Ending balance		41,524	40,940	41,524	40,940
Ending allowance balance attributable to loans:
Individually evaluated for impairment		3,123	3,153	3,123	3,153
Collectively evaluated for impairment		36,975	37,156	36,975	37,156
Acquired and accounted for under ASC 310-30	[1]	1,426	631	1,426	631
Allowance for credit losses
Acquired and accounted for under ASC 310-30	[1]	1,426	631	1,426	631
Loans:
Individually evaluated for impairment		29,354	49,077	29,354	49,077
Collectively evaluated for impairment		2,550,655	2,598,335	2,550,655	2,598,335
Acquired and accounted for under ASC 310-30	[1]	47,803	110,004	47,803	110,004
Total loans		2,627,812	2,757,416	2,627,812	2,757,416
Allowance for loan losses and unfunded commitments acquired with deteriorated credit quality		1,800		1,800		$ 1,300
Residential real estate
Allowance for credit losses [Roll Forward]
Beginning balance		6,669	7,495	6,646	8,872
Charge-offs		292	740	1,189	1,438
Recoveries		337	4	417	529
Provision		(868)	534	(28)	(670)
Ending balance		5,846	7,293	5,846	7,293
Ending allowance balance attributable to loans:
Individually evaluated for impairment		2,834	3,196	2,834	3,196
Collectively evaluated for impairment		3,012	4,097	3,012	4,097
Acquired and accounted for under ASC 310-30	[1]		0		0
Allowance for credit losses
Acquired and accounted for under ASC 310-30	[1]		0		0
Loans:
Individually evaluated for impairment		14,233	15,811	14,233	15,811
Collectively evaluated for impairment		592,938	501,023	592,938	501,023
Acquired and accounted for under ASC 310-30	[1]	43,735	3,389	43,735	3,389
Total loans		650,906	520,223	650,906	520,223
Construction real estate
Allowance for credit losses [Roll Forward]
Beginning balance		12,459	4,613	8,918	6,856
Charge-offs		5	5	11	75
Recoveries		216	25	253	201
Provision		123	2,174	3,633	(175)
Ending balance		12,793	6,807	12,793	6,807
Ending allowance balance attributable to loans:
Individually evaluated for impairment		0	161	0	161
Collectively evaluated for impairment		12,700	6,641	12,700	6,641
Acquired and accounted for under ASC 310-30	[1]	93	5	93	5
Allowance for credit losses
Acquired and accounted for under ASC 310-30	[1]	93	5	93	5
Loans:
Individually evaluated for impairment		0	337	0	337
Collectively evaluated for impairment		255,620	221,783	255,620	221,783
Acquired and accounted for under ASC 310-30	[1]	12,372	30,330	12,372	30,330
Total loans		267,992	252,450	267,992	252,450
Indirect vehicle
Allowance for credit losses [Roll Forward]
Beginning balance		1,909	1,727	1,687	1,662
Charge-offs		581	1,043	2,082	2,546
Recoveries		334	402	1,354	1,283
Provision		512	643	1,215	1,330
Ending balance		2,174	1,729	2,174	1,729
Ending allowance balance attributable to loans:
Individually evaluated for impairment		8	27	8	27
Collectively evaluated for impairment		2,166	1,702	2,166	1,702
Loans:
Individually evaluated for impairment		131	212	131	212
Collectively evaluated for impairment		345,600	272,826	345,600	272,826
Total loans		345,731	273,038	345,731	273,038
Home equity
Allowance for credit losses [Roll Forward]
Beginning balance		8,412	8,281	9,456	8,478
Charge-offs		358	566	1,078	2,002
Recoveries		186	46	447	306
Provision		(1,490)	1,836	(2,075)	2,815
Ending balance		6,750	9,597	6,750	9,597
Ending allowance balance attributable to loans:
Individually evaluated for impairment		2,478	1,690	2,478	1,690
Collectively evaluated for impairment		4,272	7,907	4,272	7,907
Loans:
Individually evaluated for impairment		29,520	25,562	29,520	25,562
Collectively evaluated for impairment		193,653	237,415	193,653	237,415
Acquired and accounted for under ASC 310-30	[1]	11,986	115	11,986	115
Total loans		235,159	263,092	235,159	263,092
Other consumer
Allowance for credit losses [Roll Forward]
Beginning balance		2,135	2,282	1,960	1,630
Charge-offs		467	497	1,391	1,582
Recoveries		118	65	356	211
Provision		484	(65)	1,345	1,526
Ending balance		2,270	1,785	2,270	1,785
Ending allowance balance attributable to loans:
Individually evaluated for impairment			0		0
Collectively evaluated for impairment		2,270	1,785	2,270	1,785
Loans:
Individually evaluated for impairment		0	0	0	0
Collectively evaluated for impairment		87,612	69,028	87,612	69,028
Acquired and accounted for under ASC 310-30	[1]	2,608	22,783	2,608	22,783
Total loans		90,220	$ 91,811	90,220	$ 91,811
Purchased loans
Allowance for credit losses [Roll Forward]
Provision				(2,200)
Loans:
Total loans		$ 44,400		44,400
Allowance for loan losses and unfunded commitments write offs net of recoveries				$ (2,699)
Provision and charge-offs related to the number of pools | Pools_of_purchased_loans				16

[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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Business Combination (Details 4) - Taylor Capital Group, Inc. - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014
Business Acquisition [Line Items]
Total revenues (net interest income plus non-interest income)	$ 199,207	$ 583,483
Net income	$ 11,156	$ 77,527

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Loans (Tables)

9 Months Ended

Sep. 30, 2015

Receivables [Abstract]

Schedule of Composition of Loans

Loans consist of the following at (in thousands):

	September 30, 2015		December 31, 2014
Commercial loans	$	3,440,632	$	3,245,206
Commercial loans collateralized by assignment of lease payments	1,693,540		1,692,258
Commercial real estate	2,580,009		2,544,867
Residential real estate	607,171		503,287
Construction real estate	255,620		247,068
Indirect vehicle	345,731		268,840
Home equity	223,173		251,909
Other consumer loans	87,612		78,137
Total loans, excluding purchased credit-impaired loans	9,233,488		8,831,572
Purchased credit-impaired loans	155,693		251,645
Total loans	$	9,389,181	$	9,083,217

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, 2015 and December 31, 2014 (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, 2015
Commercial	$	3,424,488	$	6,524	$	3,435	$	6,185	$	16,144	$	3,440,632
Commercial collateralized by assignment of lease payments	1,676,959		4,322		2,007		10,252		16,581		1,693,540
Commercial real estate
Healthcare	399,756		1,100		—		—		1,100		400,856
Industrial	368,596		—		—		793		793		369,389
Multifamily	383,603		874		1,542		1,371		3,787		387,390
Retail	423,888		1,379		4,161		1,774		7,314		431,202
Office	212,627		284		—		4,510		4,794		217,421
Other	767,781		3,294		1,429		1,247		5,970		773,751
Residential real estate	595,412		1,496		1,940		8,323		11,759		607,171
Construction real estate	255,620		—		—		—		—		255,620
Indirect vehicle	342,483		2,166		732		350		3,248		345,731
Home equity	213,828		1,584		1,918		5,843		9,345		223,173
Other consumer	87,233		191		120		68		379		87,612
Total loans, excluding purchased credit-impaired loans	9,152,274		23,214		17,284		40,716		81,214		9,233,488
Purchased credit-impaired loans	94,249		69		1,776		59,599		61,444		155,693
Total loans	$	9,246,523	$	23,283	$	19,060	$	100,315	$	142,658	$	9,389,181
Non-performing loan aging	$	50,258	$	3,981	$	1,734	$	40,604	$	46,319	$	96,577
December 31, 2014
Commercial	$	3,231,571	$	8,222	$	—	$	5,413	$	13,635	$	3,245,206
Commercial collateralized by assignment of lease payments	1,679,991		2,025		6,095		4,147		12,267		1,692,258
Commercial real estate
Healthcare	342,984		—		—		—		—		342,984
Industrial	333,907		944		—		3,182		4,126		338,033
Multifamily	417,504		1,377		—		1,517		2,894		420,398
Retail	432,718		2,481		652		2,325		5,458		438,176
Office	244,166		—		—		2,127		2,127		246,293
Other	754,031		307		2,421		2,224		4,952		758,983
Residential real estate	485,492		8,038		2,319		7,438		17,795		503,287
Construction real estate	246,731		—		—		337		337		247,068
Indirect vehicle	265,296		2,516		702		326		3,544		268,840
Home equity	242,756		2,717		1,039		5,397		9,153		251,909
Other consumer	78,106		16		12		3		31		78,137
Total loans, excluding purchased credit-impaired loans	8,755,253		28,643		13,240		34,436		76,319		8,831,572
Purchased credit-impaired loans	158,215		4,432		585		88,413		93,430		251,645
Total loans	$	8,913,468	$	33,075	$	13,825	$	122,849	$	169,749	$	9,083,217
Non-performing loan aging	$	46,149	$	5,764	$	1,099	$	34,075	$	40,938	$	87,087

Recorded Investment in Nonaccrual 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, 2015 and December 31, 2014 (in thousands):

	September 30, 2015				December 31, 2014
			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	$	22,639	$	—	$	14,088	$	—
Commercial collateralized by assignment of lease payments	8,113		3,713		2,404		3,566
Commercial real estate:
Healthcare	—		—		—		—
Industrial	1,216		—		6,371		—
Multifamily	4,029		—		5,333		—
Office	3,209		—		3,644		464
Retail	4,510		—		2,986		—
Other	12,383		90		13,541		324
Residential real estate	17,656		416		17,311		—
Construction real estate	—		—		337		—
Indirect vehicle	1,563		—		1,542		—
Home equity	16,940		—		15,171		—
Other consumer	44		56		5		—
Total	$	92,302	$	4,275	$	82,733	$	4,354

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, 2015 and December 31, 2014 (in thousands):

	Pass		Special Mention		Substandard		Doubtful		Total
September 30, 2015
Commercial	$	3,160,263	$	167,652	$	112,717	$	—	$	3,440,632
Commercial collateralized by assignment of lease payments	1,681,021		3,098		9,421		—		1,693,540
Commercial real estate
Healthcare	396,511		4,345		—		—		400,856
Industrial	350,058		17,498		1,833		—		369,389
Multifamily	381,766		737		4,887		—		387,390
Retail	420,428		5,930		4,844		—		431,202
Office	198,930		9,520		8,971		—		217,421
Other	724,466		12,896		36,389		—		773,751
Construction real estate	255,620		—		—		—		255,620
Total	$	7,569,063	$	221,676	$	179,062	$	—	$	7,969,801
December 31, 2014
Commercial	$	3,036,069	$	178,984	$	30,153	$	—	$	3,245,206
Commercial collateralized by assignment of lease payments	1,680,736		6,853		4,669		—		1,692,258
Commercial real estate
Healthcare	338,622		4,362		—		—		342,984
Industrial	314,225		8,817		14,991		—		338,033
Multifamily	412,824		920		6,654		—		420,398
Retail	423,842		2,740		11,594		—		438,176
Office	229,947		8,524		7,822		—		246,293
Other	708,447		22,013		28,523		—		758,983
Construction real estate	246,204		527		337		—		247,068
Total	$	7,390,916	$	233,740	$	104,743	$	—	$	7,729,399

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, 2015 and December 31, 2014 (in thousands):

	Performing		Non-performing		Total
September 30, 2015
Residential real estate	$	589,099	$	18,072	$	607,171
Indirect vehicle	344,168		1,563		345,731
Home equity	206,233		16,940		223,173
Other consumer	87,512		100		87,612
Total	$	1,227,012	$	36,675	$	1,263,687
December 31, 2014
Residential real estate	$	485,976	$	17,311	$	503,287
Indirect vehicle	267,297		1,543		268,840
Home equity	236,739		15,170		251,909
Other consumer	78,132		5		78,137
Total	$	1,068,144	$	34,029	$	1,102,173

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, 2015 and December 31, 2014 (in thousands):

	September 30, 2015
									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	$	7,080	$	7,080	$	—	$	—	$	4,009	$	—	$	7,254	$	—
Commercial collateralized by assignment of lease payments	—		—		—		—		—		—		1,495		47
Commercial real estate:
Healthcare	—		—		—		—		—		—		—		—
Industrial	3,053		3,053		—		—		3,232		—		4,923		—
Multifamily	1,754		1,754		—		—		1,874		—		1,859		17
Retail	5,072		2,119		2,953		—		3,342		—		824		—
Office	2,379		1,802		577		—		2,396		—		1,318		—
Other	811		800		11		—		849		—		1,514		—
Residential real estate	970		970		—		—		949		—		482		—
Construction real estate	—		—		—		—		—		—		—		—
Indirect vehicle	—		—		—		—		—		—		—		—
Home equity	1,327		927		400		—		1,327		—		667		—
Other consumer	—		—		—		—		—		—		—		—
With an allowance recorded:
Commercial	29,245		29,245		—		7,943		30,590		—		9,500		—
Commercial collateralized by assignment of lease payments	7,208		6,724		484		2,618		6,982		18		3,728		94
Commercial real estate:
Healthcare	—		—		—		—		—		—		—		—
Industrial	820		793		27		22		839		—		33		—
Multifamily	1,037		1,037		—		78		1,148		—		4,856		27
Retail	4,790		4,790		—		1,326		4,046		—		7,433		—
Office	2,174		2,174		—		1,697		2,215		—		2,297		—
Other	11,032		11,032		—		—		12,007		—		13,265		—
Residential real estate	15,215		13,263		1,952		2,834		12,867		—		14,083		—
Construction real estate	—		—		—		—		—		—		431		—
Indirect vehicle	215		131		84		8		272		—		310		—
Home equity	30,896		28,593		2,303		2,478		28,380		—		27,299		—
Other consumer	—		—		—		—		—		—		—		—
Total	$	125,078	$	116,287	$	8,791	$	19,004	$	117,324	$	18	$	103,571	$	185

	December 31, 2014
									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	$	9,752	$	8,992	$	760	$	—	$	10,324	$	—
Commercial collateralized by assignment of lease payments	2,316		2,316		—		—		2,569		121
Commercial real estate:
Healthcare	—		—		—		—		—		—
Industrial	9,115		5,858		3,257		—		7,870		—
Multifamily	1,733		1,733		—		—		1,928		52
Retail	2,025		813		1,212		—		3,465		—
Office	—		—		—		—		1,127		—
Other	1,479		1,465		14		—		5,249		—
Residential real estate	1,941		1,941		—		—		2,740		—
Construction real estate	—		—		—		—		34		—
Indirect vehicle	—		—		—		—		—		—
Home equity	577		577		—		—		762		—
Other consumer	—		—		—		—		—		—
With an allowance recorded:
Commercial	7,987		7,987		—		2,395		14,227		—
Commercial collateralized by assignment of lease payments	715		715		—		105		1,515		91
Commercial real estate:
Healthcare	—		—		—		—		—		—
Industrial	517		513		4		130		4,982		—
Multifamily	5,680		4,709		971		996		6,354		131
Retail	9,264		7,897		1,367		720		8,547		—
Office	4,528		2,986		1,542		545		2,833		—
Other	12,612		12,527		85		136		11,022		12
Residential real estate	14,234		14,234		—		3,126		14,632		—
Construction real estate	2,707		337		2,370		162		455		—
Indirect vehicle	227		227		—		14		358		—
Home equity	25,927		25,705		222		2,153		25,672		—
Other consumer	—		—		—		—		—		—
Total	$	113,336	$	101,532	$	11,804	$	10,482	$	126,665	$	407

Schedule of Loans That Have Been Restructured Classified as Performing and Non-Performing

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

The following table presents loans that were restructured during the three months ended September 30, 2014 (dollars in thousands):

	September 30, 2014
	Number of Loans	Pre-Modification Recorded Investment		Post-Modification Recorded Investment		Charge-offs and Specific Reserves
Non-Performing:
Residential real estate	2	$	411	$	411	$	246
Indirect vehicle	15	95		95		38
Home equity	6	604		604		104
Total	23	$	1,110	$	1,110	$	388

The following table presents loans that were restructured during the nine months endedSeptember 30, 2014 (dollars in thousands):

	September 30, 2014
	Number of Loans	Pre-Modification Recorded Investment		Post-Modification Recorded Investment		Charge-offs and Specific Reserves
Performing:
Indirect vehicle	1	$	5	$	5	$	—
Home equity	6	1,883		1,883		—
Total	7	$	1,888	$	1,888	$	—
Non-Performing:
Commercial	1	$	263	$	263	$	85
Commercial real estate:
Multifamily	1	158		158		40
Residential real estate	6	1,850		1,850		246
Indirect vehicle	44	262		262		65
Home equity	13	1,667		1,667		104
Total	65	$	4,200	$	4,200	$	540

Troubled Debt Restructuring Activity Rollforward

The following table presents the troubled debt restructurings activity during the nine months endedSeptember 30, 2015 (in thousands):

	Performing			Non-performing
Beginning balance	$	15,603		$	25,771
Additions	4,370			1,897
Charge-offs	—			(244		)
Principal payments, net	(281		)	(631		)
Removals	(3,417		)	(1,113		)
Transfer to other real estate owned	—			(482		)
Transfers in	4,034			189
Transfers out	(189		)	(4,034		)
Ending balance	$	20,120		$	21,353

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, 2015 (in thousands):

	September 30, 2015
	Extended
	Maturity,				Delay in
	Amortization		Extended		Payments or
	and Reduction		Maturity and/or		Reduction of
	of Interest Rate		Amortization		Interest Rate		Total
Commercial	$	—	$	—	$	80	$	80
Commercial real estate:
Multifamily	—		334		—		334
Residential real estate	140		—		—		140
Indirect vehicle	—		—		75		75
Home equity	2,541		267		2,830		5,638
Total	$	2,681	$	601	$	2,985	$	6,267

Allowance Activity for Loan Losses by Portfolio Segment Based on Impairment Method

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, 2015 and 2014 (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, 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

	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, 2014
Allowance for credit losses:
Three Months Ended
Beginning balance	$	23,154	$	9,425		$	43,933		$	7,495		$	4,613		$	1,727	$	8,281	$	2,282		$	2,995		$	103,905
Allowance for unfunded credit commitments acquired through business combination	—		—			—			—			—			—		—		—			1,261			1,261
Utilization of allowance for unfunded credit commitments	—		—			—			—			—			—		—		—			(637		)	(637		)
Charge-offs	606		—			1,027			740			5			1,043		566		497			—			4,484
Recoveries	564		425			2,227			4			25			402		46		65			—			3,758
Provision	2,181		(484		)	(4,193		)	534			2,174			643		1,836		(65		)	483			3,109
Ending balance	$	25,293	$	9,366		$	40,940		$	7,293		$	6,807		$	1,729	$	9,597	$	1,785		$	4,102		$	106,912
Nine Months Ended
Beginning balance	$	23,461	$	9,159		$	51,628		$	8,872		$	6,856		$	1,662	$	8,478	$	1,630		$	1,716		$	113,462
Allowance for unfunded credit commitments acquired through business combination	—		—			—			—			—			—		—		—			1,261			1,261
Utilization of allowance for unfunded credit commitments	—		—			—			—			—			—		—		—			(637		)	(637		)
Charge-offs	1,142		40			9,910			1,438			75			2,546		2,002		1,582			—			18,735
Recoveries	2,888		555			3,279			529			201			1,283		306		211			—			9,252
Provision	86		(308		)	(4,057		)	(670		)	(175		)	1,330		2,815		1,526			1,762			2,309
Ending balance	$	25,293	$	9,366		$	40,940		$	7,293		$	6,807		$	1,729	$	9,597	$	1,785		$	4,102		$	106,912
Ending allowance balance attributable to loans:
Individually evaluated for impairment	$	2,250	$	238		$	3,153		$	3,196		$	161		$	27	$	1,690	$	—		$	1,316		$	12,031
Collectively evaluated for impairment	22,433		9,128			37,156			4,097			6,641			1,702		7,907		1,785			2,786			93,635
Acquired and accounted for under ASC 310-30 (1)	610		—			631			—			5			—		—		—			—			1,246
Total ending allowance balance	$	25,293	$	9,366		$	40,940		$	7,293		$	6,807		$	1,729	$	9,597	$	1,785		$	4,102		$	106,912
Loans:
Individually evaluated for impairment	$	18,850	$	6,211		$	49,077		$	15,811		$	337		$	212	$	25,562	$	—		$	—		$	116,060
Collectively evaluated for impairment	3,045,819		1,625,449			2,598,335			501,023			221,783			272,826		237,415		69,028			—			8,571,678
Acquired and accounted for under ASC 310-30 (1)	121,565		—			110,004			3,389			30,330			—		115		22,783			—			288,186
Total ending loans balance	$	3,186,234	$	1,631,660		$	2,757,416		$	520,223		$	252,450		$	273,038	$	263,092	$	91,811		$	—		$	8,975,924

⁽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 nine months endedSeptember 30, 2015 and 2014 (in thousands):

	Three Months Ended					Nine Months Ended
	September 30,					September 30,
	2015			2014		2015			2014
Balance at beginning of period	$	11,456		$	1,218	$	7,434		$	2,337
Purchases	—			5,626		—			5,626
Accretion	(1,794		)	2,076		(5,541		)	383
Other (1)	590			931		8,359			1,505
Balance at end of period	$	10,252		$	9,851	$	10,252		$	9,851

⁽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.

Purchased Loans Disclosures

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

September 30, 2015	Purchased Credit-Impaired Loans		Purchased Non-Credit-Impaired Loans		Total
Covered loans:
Consumer related	$	18,959	$	—	$	18,959
Non-covered loans:
Commercial loans	37,189		796,449		833,638
Commercial loans collateralized by assignment of lease payments	—		100,708		100,708
Commercial real estate	47,803		715,026		762,829
Construction real estate	12,372		53,540		65,912
Consumer related	39,370		192,210		231,580
Total non-covered loans	136,734		1,857,933		1,994,667
Total acquired	$	155,693	$	1,857,933	$	2,013,626

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Goodwill and Intangibles (Tables)

9 Months Ended

Sep. 30, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the Carrying Amount of Core Deposit and Client Relationship Intangibles

The following table presents the changes during the nine months ended September 30, 2015 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, 2015 (in thousands):

	September 30, 2015
Balance at beginning of period	$	38,006
Amortization expense	(4,569		)
Other intangibles from acquisition	4,083
Balance at end of period	$	37,520
Gross carrying amount	$	84,454
Accumulated amortization	(46,934		)
Net book value	$	37,520

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
2015	$	1,546
2016	5,523
2017	4,943
2018	4,526
2019	3,040
Thereafter	17,942
	$	37,520

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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash Flows From Operating Activities
Net income	$ 115,341	$ 49,976
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of premises and equipment and leased equipment	45,550	42,645
Branch exit and facilities impairment charges	7,899	0
Compensation expense for share-based payment plans	10,983	6,593
Net loss (gain) on sales of premises and equipment and leased equipment	1,800	(1,612)
Amortization of other intangibles	4,569	3,884
Provision for credit losses	14,628	2,309
Deferred income tax expense	13,521	22,192
Amortization of premiums and discounts on investment securities, net	35,441	33,661
Amortization of premiums and discounts on loans, net	(26,365)	(8,350)
Accretion of FDIC indemnification asset	(72)	(92)
Net loss on investment securities	173	3,016
Proceeds from sale of loans held for sale	5,500,778	873,877
Origination of loans held for sale	(5,450,842)	(745,677)
Net gain on sale of loans held for sale	(25,449)	(7,285)
Change in fair value of mortgage servicing rights	40,568	(7,517)
Net loss on other real estate owned	2,070	1,674
Net (gain) loss on other real estate owned related to FDIC-assisted transactions	(296)	473
Increase in cash surrender value of life insurance	(2,527)	(2,516)
(Increase) decrease in other assets, net	(120,160)	77,888
Increase in other liabilities, net	(8,576)	(46,942)
Net cash provided by operating activities	159,034	298,197
Cash Flows From Investing Activities
Decrease in federal funds sold	0	42,950
Proceeds from sales of investment securities available for sale	28,356	463,306
Proceeds from maturities and calls of investment securities available for sale	206,378	195,219
Purchases of investment securities available for sale	(148,374)	(204,274)
Proceeds from maturities and calls of investment securities held to maturity	61,521	28,338
Purchases of investment securities held to maturity	(295,857)	(116,973)
Purchases of non-marketable securities - FHLB and FRB stock	(35,831)	(15)
Redemption of non-marketable securities - FHLB and FRB stock	20,000	26,483
Net (increase) decrease in loans	(248,219)	248,886
Purchases of mortgage servicing rights	(785)	(489)
Proceeds from sale of mortgage servicing rights	103,105	0
Purchases of premises and equipment and leased equipment	(64,149)	(46,865)
Proceeds from sales of premises and equipment and leased equipment	3,993	7,499
Proceeds from sale of other real estate owned	3,153	8,390
Proceeds from sale of other real estate owned related to FDIC-assisted transactions	9,674	11,022
Net cash acquired in business acquisition	0	25,249
Net proceeds from FDIC related covered assets	(6,831)	(189)
Net cash (used in) provided by investing activities	(363,866)	688,537
Cash Flows From Financing Activities
Net increase (decrease) in deposits	263,636	(95,924)
Net increase (decrease) in short-term borrowings	9,114	(862,029)
Proceeds from long-term borrowings	27,159	23,940
Principal paid on long-term borrowings	(14,900)	(8,830)
Redemption of junior subordinated notes issued to capital trusts	0	(45,369)
Treasury stock transactions, net	(50,800)	(2,633)
Stock options exercised	499	902
Excess tax expense from share-based payment arrangements	241	316
Dividends paid on preferred stock	(6,000)	0
Dividends paid on common stock	(35,953)	(23,770)
Net cash provided by (used in) financing activities	192,996	(1,013,397)
Net increase in cash and cash equivalents	(11,836)	(26,663)
Cash and cash equivalents:
Beginning of period	312,081	473,459
End of period	300,245	446,796
Cash payments for:
Interest paid to depositors and other borrowed funds	21,656	15,911
Income tax (refunds) payments, net	(4,958)	17,300
Supplemental Schedule of Noncash Investing Activities:
Investment securities held to maturity purchased not settled	11,656	0
Transfer of investment securities held to maturity to investment securities available for sale	0	273,471
Loans held for sale transferred to loans held for investment	44,078	0
Loans transferred to other real estate owned	15,611	872
Loans transferred to other real estate owned related to FDIC-assisted transactions	3,221	13,179
Loans transferred to repossessed vehicles	777	609
Operating leases rewritten as direct finance leases included as loans	6,940	4,696
Noncash assets acquired:
Investment securities available for sale	0	826,691
Investment securities held to maturity	0	22,599
Non-marketable securities - FHLB and FRB stock	$ 0	50,620
Loans held for sale		670,671
Loans	$ 0	3,532,211
Lease investments	0	11,885
Premises and equipment	0	19,701
Goodwill	0	288,152
Core deposit intangible	0	20,079
Mortgage servicing rights	0	224,453
Other real estate owned	0	4,720
Other assets	0	130,478
Total noncash assets acquired	0	5,802,260
Liabilities assumed:
Deposits	0	3,953,213
Short-term borrowings	0	1,035,800
Junior subordinated notes issued to capital trusts	0	80,843
Other liabilities	0	123,028
Total liabilities assumed	$ 0	$ 5,192,884

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Deposits (Tables)

9 Months Ended

Sep. 30, 2015

Banking and Thrift [Abstract]

Schedule of Composition of Deposits

The composition of deposits was as follows (in thousands):

	September 30,		December 31,
	2015		2014
Demand deposit accounts, noninterest bearing	$	4,434,067	$	4,118,256
NOW and money market accounts	4,129,414		3,913,765
Savings accounts	953,746		940,345
Certificates of deposit, $250,000 or more	811,850		838,928
Other certificates of deposit	925,501		1,179,648
Total	$	11,254,578	$	10,990,942

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Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Basic and diluted earnings per common share:
Net income	$ 40,278	$ 6,901	$ 115,341	$ 49,976
Less: preferred stock dividends	2,000	2,000	6,000	2,000
Net income available to common stockholders	38,278	4,901	109,341	47,976
Earnings allocated to common stockholders	$ 38,276	$ 4,901	$ 109,336	$ 47,975
Weighted average shares outstanding for basic earnings per common share	74,297,281	63,972,902	74,478,164	57,795,094
Weighted average shares outstanding for diluted earnings per common share	75,029,827	64,457,978	75,154,585	58,341,927
Basic earnings per common share	$ 0.52	$ 0.08	$ 1.47	$ 0.83
Diluted earnings per common share	$ 0.51	$ 0.08	$ 1.45	$ 0.82
Common Stock
Basic and diluted earnings per common share:
Distributed earnings allocated to common stock	$ 12,733	$ 10,545	$ 36,227	$ 23,877
Undistributed earnings	27,545	(3,644)	79,114	26,099
Net income	40,278	6,901	115,341	49,976
Net income available to common stockholders	$ 38,278	$ 4,901	$ 109,341	$ 47,976
Weighted average shares outstanding for basic earnings per common share	74,297,281	63,972,902	74,478,164	57,795,094
Dilutive effect of equity awards	732,546	485,076	676,421	546,833
Weighted average shares outstanding for diluted earnings per common share	75,029,827	64,457,978	75,154,585	58,341,927
Participating Securities
Basic and diluted earnings per common share:
Less: earnings allocated to participating securities	$ 2	$ 0	$ 5	$ 1

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Loans (Details 6) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($) loan	Sep. 30, 2014 USD ($) loan	Sep. 30, 2015 USD ($) loan	Sep. 30, 2014 USD ($) loan
Restructured loans
Redefaulted loans	$ 224		$ 224
Period past due of recorded redefaulted loans (in days)			90 days	90 days
Performing
Restructured loans
Number of Loans | loan	4		17	7
Pre-Modification Recorded Investment	$ 477		$ 4,370	$ 1,888
Post-Modification Recorded Investment	477		4,370	1,888
Charge-offs and Specific Reserves	$ 0		$ 0	$ 0
Non-performing loan aging
Restructured loans
Number of Loans | loan	11	23	24	65
Pre-Modification Recorded Investment	$ 595	$ 1,110	$ 1,897	$ 4,200
Post-Modification Recorded Investment	595	1,110	1,897	4,200
Charge-offs and Specific Reserves	$ 24	$ 388	$ 170	$ 540
Commercial loans | Performing
Restructured loans
Number of Loans | loan			1
Pre-Modification Recorded Investment			$ 80
Post-Modification Recorded Investment			80
Charge-offs and Specific Reserves			$ 0
Commercial loans | Non-performing loan aging
Restructured loans
Number of Loans | loan				1
Pre-Modification Recorded Investment				$ 263
Post-Modification Recorded Investment				263
Charge-offs and Specific Reserves				$ 85
Multifamily | Non-performing loan aging
Restructured loans
Number of Loans | loan			1	1
Pre-Modification Recorded Investment			$ 334	$ 158
Post-Modification Recorded Investment			334	158
Charge-offs and Specific Reserves			$ 0	$ 40
Residential real estate | Non-performing loan aging
Restructured loans
Number of Loans | loan		2	1	6
Pre-Modification Recorded Investment		$ 411	$ 140	$ 1,850
Post-Modification Recorded Investment		411	140	1,850
Charge-offs and Specific Reserves		$ 246	$ 17	$ 246
Indirect vehicle | Performing
Restructured loans
Number of Loans | loan				1
Pre-Modification Recorded Investment				$ 5
Post-Modification Recorded Investment				5
Charge-offs and Specific Reserves				$ 0
Indirect vehicle | Non-performing loan aging
Restructured loans
Number of Loans | loan	7	15	13	44
Pre-Modification Recorded Investment	$ 45	$ 95	$ 75	$ 262
Post-Modification Recorded Investment	45	95	75	262
Charge-offs and Specific Reserves	$ 16	$ 38	$ 23	$ 65
Home equity | Performing
Restructured loans
Number of Loans | loan	4		16	6
Pre-Modification Recorded Investment	$ 477		$ 4,290	$ 1,883
Post-Modification Recorded Investment	477		4,290	1,883
Charge-offs and Specific Reserves	$ 0		$ 0	$ 0
Home equity | Non-performing loan aging
Restructured loans
Number of Loans | loan	4	6	9	13
Pre-Modification Recorded Investment	$ 550	$ 604	$ 1,348	$ 1,667
Post-Modification Recorded Investment	550	604	1,348	1,667
Charge-offs and Specific Reserves	$ 8	$ 104	$ 130	$ 104

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Fair Value Measurements (Details 4) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
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	96.00%
Investment securities
Financial assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Balance, beginning of period	$ 973	$ 5,856
Acquired through business combination	0	507
Purchases	0	0
Originations	0	0
Other comprehensive income	0	(71)
Included in earnings	0	0
Principal payments	(115)	(281)
Sales	0	(4,565)
Balance, ending of period	858	1,354
Investment securities | Recurring basis | Significant Unobservable Inputs (Level 3)
Financial assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Impairment charge	0	(92)
Mortgage servicing rights
Financial assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Balance, beginning of period	235,402	0
Acquired through business combination	0	232,783
Purchases	785	489
Originations	55,583	8,587
Other comprehensive income	0	7,517
Included in earnings	(40,568)	0
Principal payments	0	0
Sales	(103,105)	0
Balance, ending of period	148,097	249,376
Mortgage servicing rights | Recurring basis | Significant Unobservable Inputs (Level 3)
Financial assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Impairment charge	0	0
Mortgage derivative instruments
Financial assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Balance, beginning of period	5,074	0
Acquired through business combination	0	5,922
Purchases	0	0
Originations	0	0
Other comprehensive income	0	(2,395)
Included in earnings	3,088	0
Principal payments	0	0
Sales	0	0
Balance, ending of period	8,162	3,527
Mortgage derivative instruments | Recurring basis | Significant Unobservable Inputs (Level 3)
Financial assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Impairment charge	$ 0	$ 0

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CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
ASSETS
Cash and due from banks	$ 234,220	$ 256,804
Interest earning deposits with banks	66,025	55,277
Total cash and cash equivalents	300,245	312,081
Investment securities:
Securities available for sale, at fair value	1,551,238	1,654,752
Securities held to maturity, at amortized cost ($1,263,212 fair value at September 30, 2015 and $1,035,061 at December 31, 2014)	1,224,852	993,380
Non-marketable securities - FHLB and FRB stock	91,400	75,569
Total investment securities	2,867,490	2,723,701
Loans held for sale	676,020	737,209
Loans:
Total loans, excluding purchased credit impaired loans	9,233,488	8,831,572
Purchased credit impaired loans	155,693	251,645
Total loans	9,389,181	9,083,217
Less: Allowance for loan and lease losses	124,626	110,026
Net loans	9,264,555	8,973,191
Lease investments, net	184,223	162,833
Premises and equipment, net	234,115	238,377
Cash surrender value of life insurance	136,089	133,562
Goodwill	711,521	711,521
Other intangibles	37,520	38,006
Mortgage servicing rights, at fair value	148,097	235,402
Other real estate owned, net	29,587	19,198
Other real estate owned related to FDIC-assisted transactions	13,825	19,328
Other assets	346,814	297,690
Total assets	14,950,101	14,602,099
Deposits:
Non-interest bearing	4,434,067	4,118,256
Interest bearing	6,820,511	6,872,686
Total deposits	11,254,578	10,990,942
Short-term borrowings	940,529	931,415
Long-term borrowings	95,175	82,916
Junior subordinated notes issued to capital trusts	186,068	185,778
Accrued expenses and other liabilities	410,523	382,762
Total liabilities	12,886,873	12,573,813
STOCKHOLDERS’ EQUITY
Preferred stock, ($0.01 par value, authorized 10,000,000 shares at September 30, 2015 and December 31, 2014; Series A, 8% perpetual non-cumulative, 4,000,000 shares issued and outstanding at September 30, 2015 and December 31, 2014, $25 liquidation value)	115,280	115,280
Common stock, ($0.01 par value; authorized 100,000,000 shares at September 30, 2015 and December 31, 2014; issued 75,565,174 shares at September 30, 2015 and 75,067,482 shares at December 31, 2014)	756	751
Additional paid-in capital	1,277,348	1,267,761
Retained earnings	702,789	629,677
Accumulated other comprehensive income	20,968	20,356
Less: 1,788,978 and 296,715 shares of treasury common stock, at cost, at September 30, 2015 and December 31, 2014, respectively	(55,258)	(6,974)
Controlling interest stockholders’ equity	2,061,883	2,026,851
Noncontrolling interest	1,345	1,435
Total stockholders’ equity	2,063,228	2,028,286
Total liabilities and stockholders’ equity	$ 14,950,101	$ 14,602,099

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Investment Securities (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Available for Sale
Amortized Cost	$ 1,517,226	$ 1,624,268
Gross Unrealized Gains	37,707	35,370
Gross Unrealized Losses	(3,695)	(4,886)
Fair Value	1,551,238	1,654,752
Held to Maturity
Amortized Cost	1,224,852	993,380
Gross Unrealized Gains	40,413	42,063
Gross Unrealized Losses	(2,053)	(382)
Fair Value	1,263,212	1,035,061
Total Available for Sale and Held to Maturity Investment Securities
Amortized Cost	2,742,078	2,617,648
Gross Unrealized Gains	78,120	77,433
Gross Unrealized Losses	(5,748)	(5,268)
Fair Value	2,814,450	2,689,813
U.S. Government sponsored agencies and enterprises
Available for Sale
Amortized Cost	64,008	64,612
Gross Unrealized Gains	1,453	1,281
Gross Unrealized Losses	0	(20)
Fair Value	65,461	65,873
States and political subdivisions
Available for Sale
Amortized Cost	379,015	390,076
Gross Unrealized Gains	20,289	20,846
Gross Unrealized Losses	(30)	(68)
Fair Value	399,274	410,854
Held to Maturity
Amortized Cost	1,002,963	752,558
Gross Unrealized Gains	30,098	30,089
Gross Unrealized Losses	(2,053)	(382)
Fair Value	$ 1,031,008	782,265
Total Available for Sale and Held to Maturity Investment Securities
Percentage of securities consisting general obligation issues	95.00%
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	22.00%
Residential mortgage-backed securities
Available for Sale
Amortized Cost	$ 683,955	713,413
Gross Unrealized Gains	10,379	8,977
Gross Unrealized Losses	(1,109)	(1,827)
Fair Value	693,225	720,563
Held to Maturity
Amortized Cost	221,889	240,822
Gross Unrealized Gains	10,315	11,974
Gross Unrealized Losses	0	0
Fair Value	232,204	252,796
Commercial mortgage-backed securities
Available for Sale
Amortized Cost	150,836	186,110
Gross Unrealized Gains	3,618	1,772
Gross Unrealized Losses	(253)	(220)
Fair Value	154,201	187,662
Corporate bonds
Available for Sale
Amortized Cost	228,711	259,526
Gross Unrealized Gains	1,843	2,428
Gross Unrealized Losses	(2,303)	(2,751)
Fair Value	228,251	259,203
Equity securities
Available for Sale
Amortized Cost	10,701	10,531
Gross Unrealized Gains	125	66
Gross Unrealized Losses	0	0
Fair Value	$ 10,826	$ 10,597

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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, 2013	$ 1,326,682	$ 0	$ 551	$ 738,053	$ 581,998	$ 8,383	$ (3,747)	$ 1,444
Increase (Decrease) in Stockholders' Equity
Net income	50,196				49,976			220
Other comprehensive income, net of tax	10,048					10,048
Issuance of preferred stock	115,280	115,280
Issuance of common stock due to business combination	518,992		196	518,796
Cash dividends declared on preferred shares	(2,000)				(2,000)
Cash dividends declared on common shares	(23,877)				(23,877)
Restricted common stock activity, net of tax	815		2	753			60
Stock option activity, net of tax	485		2	483
Repurchase of common shares in connection with employee benefit plans and held in trust for deferred compensation plan	(2,633)			372			(3,005)
Stock-based compensation expense	6,593			6,593
Distributions to noncontrolling interest	(213)							(213)
Ending balance at Sep. 30, 2014	2,000,368	115,280	751	1,265,050	606,097	18,431	(6,692)	1,451
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	(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 noncontrolling 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

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Goodwill and Intangibles (Details)	9 Months Ended
	Sep. 30, 2015 USD ($) segment	Sep. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Number of operating segments | segment	3
Impairment loss	$ 0	$ 0
Goodwill	$ 711,521,000		$ 711,521,000
Weighted average amortization period (in years)	6 years
Other intangibles from acquisition	$ 4,083,000

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Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2015

Commitments and Contingencies Disclosure [Abstract]

Schedule of Outstanding Financial Instruments, Contractual Amounts of Off-Balance Sheet Credit Risk

At September 30, 2015 and December 31, 2014, the following financial instruments were outstanding, the contractual amounts of which represent off-balance sheet credit risk (in thousands):

	Contractual Amount
	September 30, 2015		December 31, 2014
Commitments to extend credit:
Home equity lines	$	194,644	$	221,102
Other commitments	3,028,042		2,643,220
Letters of credit:
Standby	132,277		131,810
Commercial	1,747		2,401

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Long-term Borrowings (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Long-term borrowings
Federal Home Loan Bank advances	$ 5,300	$ 4,200
Effective interest rates on Federal Home Loan Bank advances, low end of range (as a percent)	3.23%
Effective interest rates on Federal Home Loan Bank advances, high end of range (as a percent)	5.87%
Long-term borrowings	$ 95,175	82,916
Notes payable to banks
Long-term borrowings
Long-term borrowings	$ 49,800	38,500
Minimum interest rates (as a percent)	2.25%
Maximum interest rates (as a percent)	12.00%
Weighted average interest rate (as a percent)	4.34%
Equipment pledged as collateral	$ 59,500	48,800
Structured repurchase agreement
Long-term borrowings
Long-term borrowings	$ 40,000	$ 40,000
Term of structured repurchase agreement (in years)	10 years	10 years
Fixed interest rate, if option not exercised (as a percent)	4.75%	4.75%

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Stock Incentive Plans

9 Months Ended

Sep. 30, 2015

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,
	2015		2014		2015		2014
Total cost of share-based payment plans during the period	$	3,508	$	2,338	$	10,983	$	6,593
Amount of related income tax benefit recognized in income	1,367		922		4,288		$	2,592

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, 2015, there were 5,086,333 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 stock options outstanding for the nine months endedSeptember 30, 2015:

	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, 2014	2,250,714		$	27.94	4.39
Granted	322,899		31.45
Exercised	(122,584	)	22.03
Expired or cancelled	(173,977	)	41.12
Forfeited	(11,671	)	26.77
Options outstanding as of September 30, 2015	2,265,381		$	27.75	4.66	$	12,467
Options exercisable as of September 30, 2015	1,735,603		$	27.25	3.42	$	10,740

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, 2015:

	September 30, 2015
Risk-free interest rate	1.68		%
Expected volatility of Company’s stock	29.76		%
Expected dividend yield	1.81		%
Expected life of options	5.8 years
Weighted average fair value per option of options granted during the year	$	7.84

The total intrinsic value of options exercised during the nine months endedSeptember 30, 2015 and 2014 was $1.3 million and $1.6 million, respectively.

The following is a summary of changes in restricted shares and units for the nine months endedSeptember 30, 2015:

	Number of Shares and Units		Weighted Average Grant Date Fair Value
Shares Outstanding at December 31, 2014	801,085		$	26.99
Granted	523,744		31.08
Vested	(350,382	)	25.05
Forfeited	(13,939	)	28.46
Shares Outstanding at September 30, 2015	960,508		$	29.90

The total intrinsic value of restricted shares that vested during the nine months endedSeptember 30, 2015 and 2014 was $11.3 million and $8.4 million, respectively.

The Company issued 71,560, 48,569, 56,752 and 65,333 market-based restricted stock units in 2015, 2014, 2013 and 2012, 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 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. The awards issued in 2012 vested in the third quarter of 2015. Recipients of the 2012 award earned shares totaling 148% 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.

As of September 30, 2015, there was $22.7 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, 2015, the weighted-average period over which the unrecognized compensation expense is expected to be recognized was approximately 2.4 years.

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2015

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, 2015 and December 31, 2014, 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, 2015
Financial assets
Securities available for sale:
U.S Government sponsored agencies and enterprises	$	65,461	$	—	$	65,461	$	—
States and political subdivisions	399,274		—		398,811		463
Residential mortgage-backed securities	693,225		—		692,830		395
Commercial mortgage-backed securities	154,201		—		154,201		—
Corporate bonds	228,251		—		228,251		—
Equity securities	10,826		10,826		—		—
Loans held for sale	676,020		—		676,020		—
Loans	27,176		—		27,176		—
Mortgage servicing rights	148,097		—		—		148,097
Assets held in trust for deferred compensation	16,022		16,022		—		—
Derivative financial instruments	66,410		11,955		46,293		8,162
Financial liabilities
Other liabilities (1)	15,513		15,513		—		—
Derivative financial instruments	53,618		15,029		38,589		—
December 31, 2014
Financial assets
Securities available for sale:
U.S. Government sponsored agencies and enterprises	$	65,873	$	—	$	65,873	$	—
States and political subdivisions	410,854		—		410,391		463
Residential mortgage-backed securities	720,563		—		720,053		510
Commercial mortgage-backed securities	187,662		—		187,662		—
Corporate bonds	259,203		—		259,203		—
Equity securities	10,597		10,597		—		—
Loans held for sale	737,209		—		737,209		—
Mortgage servicing rights	235,402		—		—		235,402
Assets held in trust for deferred compensation	16,829		16,829		—		—
Derivative financial instruments	46,388		1,607		39,707		5,074
Financial liabilities
Other liabilities (1)	16,483		16,483		—		—
Derivative financial instruments	40,499		7,209		33,290		—

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

Financial Assets Measured at Fair Value on a Recurring and Non-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 recurring basis that were categorized within the Level 3 of the fair value hierarchy:

	Fair Value at
	September 30, 2015		Valuation Technique	Unobservable Input	Range
	(in thousands)
States and political subdivisions	$	463	Discounted cash flows	Credit assumption	45% Loss
Residential mortgage-backed securities	395		Discounted cash flows	Constant pre-payment rates (CPR)	1% - 3%
Mortgage servicing rights	148,097		Discounted cash flows	CPR	9.9% - 16.2%
				Discount rate	9.25 - 12.00
				Maturity (months)	327 - 357
				Delinquencies	0.51 - 3.80
				Costs to service	$ 60 - $ 160
				Costs to service - delinquent	$ 150 - $ 1,000
Derivative financial instruments (mortgage	8,162		Sales cash flows	Expected closing ratio	60% - 95%
interest rate lock commitments)				Expected delivery price	100.21 bps - 108.95 bps

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, 2015		Technique	Input	Range
	(in thousands)
Impaired loans	$	82,275	Appraisal of collateral	Appraisal adjustments - sales costs	5% - 10%
Foreclosed assets	43,628		Appraisal of collateral	Appraisal adjustments - sales costs	5% - 10%

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, 2015 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, 2015
Weighted average CPR	13.60		%
Impact on fair value of 10% adverse change	$	(6,402	)
Impact on fair value of 20% adverse change	(12,278		)
Weighted average discount rate	9.56		%
Impact on fair value of 10% adverse change	$	(4,917	)
Impact on fair value of 20% adverse change	(9,521		)
Weighted average delinquency rate	1.84		%
Impact on fair value of 10% adverse change	$	(811	)
Impact on fair value of 20% adverse change	(1,772		)
Weighted average costs to service	$	81
Impact on fair value of 10% adverse change	(2,563		)
Impact on fair value of 20% adverse change	(5,126		)

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,
	2015			2014			2015			2014		2015		2014
(in thousands)	Investment Securities						Mortgage Servicing Rights					Derivatives
Balance, beginning of period	$	973		$	5,856		$	235,402		$	—	$	5,074	$	—
Acquired through business combination	—			507			—			232,783		—		5,922
Purchases	—			—			785			489		—		—
Originations	—			—			55,583			8,587		—		—
Other comprehensive income	—			(71		)	—			7,517		—		(2,395		)
Included in earnings	—			—			(40,568		)	—		3,088		—
Principal payments	(115		)	(281		)	—			—		—		—
Impairment charge	—			(92		)	—			—		—		—
Sales	—			(4,565		)	(103,105		)	—		—		—
Balance, ending of period	$	858		$	1,354		$	148,097		$	249,376	$	8,162	$	3,527

Assets Measured at Fair Value on a Nonrecurring Basis

Assets measured at fair value on a nonrecurring basis as of September 30, 2015 and December 31, 2014 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, 2015
Financial assets:
Impaired loans	$	82,275	$	—	$	—	$	82,275
Non-financial assets:
Foreclosed assets	43,628		—		—		43,628
December 31, 2014
Financial assets:
Impaired loans	$	61,717	$	—	$	—	$	61,717
Non-financial assets:
Foreclosed assets	38,619		—		—		38,619

Estimated Fair Values of Financial Instruments

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

	September 30, 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	$	234,220	$	234,220	$	234,220	$	—	$	—
Interest earning deposits with banks	66,025		66,025		66,025		—		—
Federal funds sold	—		—		—		—		—
Investment securities available for sale	1,551,238		1,551,238		10,826		1,539,554		858
Investment securities held to maturity	1,224,852		1,263,212		—		1,263,212		—
Non-marketable securities - FHLB and FRB stock	91,400		91,400		—		—		91,400
Loans held for sale	676,020		676,020		—		676,020		—
Loans, net	9,264,555		9,285,678		—		27,176		9,258,502
Accrued interest receivable	51,195		51,195		51,195		—		—
Derivative financial instruments	66,410		66,410		11,955		46,293		8,162
Financial Liabilities:
Noninterest bearing deposits	$	4,434,067	$	4,434,067	$	4,434,067	$	—	$	—
Interest bearing deposits	6,820,511		6,825,784		—		—		6,825,784
Short-term borrowings	940,529		940,532		—		—		940,532
Long-term borrowings	95,175		97,252		—		—		97,252
Junior subordinated notes issued to capital trusts	186,068		115,618		—		—		115,618
Accrued interest payable	2,923		2,923		2,923		—		—
Derivative financial instruments	53,618		53,618		15,029		38,589		—

	December 31, 2014
	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	$	256,804	$	256,804	$	256,804	$	—	$	—
Interest earning deposits with banks	55,277		55,277		55,277		—		—
Investment securities available for sale	1,654,752		1,654,752		10,597		1,643,182		973
Investment securities held to maturity	993,380		1,035,061		—		1,035,061		—
Non-marketable securities - FHLB and FRB stock	75,569		75,569		—		—		75,569
Loans held for sale	737,209		737,209		—		737,209		—
Loans, net	8,973,191		8,956,494		—		—		8,956,494
Accrued interest receivable	49,065		49,065		49,065		—		—
Derivative financial instruments	46,388		46,388		1,607		39,707		5,074
Financial Liabilities:
Non-interest bearing deposits	$	4,118,256	$	4,118,256	$	4,118,256	$	—	$	—
Interest bearing deposits	6,872,686		6,877,349		—		—		6,877,349
Short-term borrowings	931,415		931,415		—		—		931,415
Long-term borrowings	82,916		86,025		—		—		86,025
Junior subordinated notes issued to capital trusts	185,778		122,408		—		—		122,408
Accrued interest payable	3,709		3,709		3,709		—		—
Derivative financial instruments	40,499		40,499		7,209		33,290		—

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Operating Segments

9 Months Ended

Sep. 30, 2015

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 and deposit gathering 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 its 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 customers and depositors.  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 mortgage loans for sale to investors and for the Company's portfolio through its retail and broker 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, 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
Three months ended September 30, 2014
Net interest income	$	88,863		$	3,216		$	3,533		$	95,612
Provision for credit losses	3,172			(58		)	(5		)	3,109
Non-interest income	27,965			16,299			16,823			61,087
Non-interest expense (1)	117,325			9,721			15,155			142,201
Income tax expense	(1,287		)	3,693			2,082			4,488
Net income	$	(2,382	)	$	6,159		$	3,124		$	6,901
Total assets	$	12,678,459		$	823,813		$	1,002,325		$	14,504,597

⁽¹⁾  Includes merger related expenses of $319 thousand and $27.2 million in the banking segment for the three months ended September 30, 2015 and 2014, respectively.

	Banking		Leasing			Mortgage Banking			Consolidated
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
Nine months ended September 30, 2014
Net interest income	$	219,248	$	8,231		$	3,533		$	231,012
Provision for credit losses	2,488		(174		)	(5		)	2,309
Non-interest income	77,842		42,716			17,069			137,627
Non-interest expense (1)	252,952		28,171			15,155			296,278
Income tax expense	9,345		8,649			2,082			20,076
Net income	$	32,305	$	14,301		$	3,370		$	49,976
Total assets	$	12,678,459	$	823,813		$	1,002,325		$	14,504,597

⁽¹⁾  Includes merger related expenses of $9.6 million and $28.3 million in the banking segment for the nine months endedSeptember 30, 2015 and 2014, respectively.

In July 2015, the mortgage banking segment sold $103.1 million in certain mortgage servicing assets.

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Commitments and Contingencies (Details 2)	9 Months Ended
	Sep. 30, 2015
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	22.00%

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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Statement of Stockholders' Equity [Abstract]
Cash dividends declared (in dollars per share)	$ 0.48	$ 0.38

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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Securities held to maturity, at amortized cost, fair value	$ 1,263,212	$ 1,035,061
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
Preferred stock, dividend rate, percentage	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
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized shares	100,000,000	100,000,000
Common stock, issued shares	75,565,174	75,067,482
Treasury stock, shares	1,788,978	296,715

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Short-Term Borrowings

9 Months Ended

Sep. 30, 2015

Debt Disclosure [Abstract]

Short-Term Borrowings

Short-Term Borrowings

Short-term borrowings were as follows as of September 30, 2015 and December 31, 2014 (dollars in thousands):

	September 30, 2015				December 31, 2014
	Weighted Average Interest Rate		Amount		Weighted Average Interest Rate		Amount
Customer repurchase agreements	0.19	%	$	262,009	0.21	%	$	219,824
Federal Home Loan Bank advances	0.17		675,000		0.13		700,000
Federal funds purchased	0.10		3,520		0.14		11,591
Total	0.18	%	$	940,529	0.15	%	$	931,415

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 $675.0 million and $700.0 million at September 30, 2015 and December 31, 2014, respectively. At September 30, 2015, the interest rate on the advances outstanding on that date had rates ranging from 0.13% to 0.23% with maturities from October 1, 2015 to December 11, 2015. 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 March 9, 2012, the Company entered into a $35.0 million unsecured line of credit with a correspondent bank. Interest is payable at a rate of one month LIBOR + 1.85%. The line of credit matured on September 7, 2015.

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Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2015	Nov. 04, 2015
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, 2015
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		73,687,703
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3

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Long-term Borrowings

9 Months Ended

Sep. 30, 2015

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 $5.3 million at September 30, 2015 and $4.2 million at December 31, 2014. As of September 30, 2015, the advances had fixed terms with effective interest rates, net of discounts, ranging from 3.23% to 5.87% and maturities ranging from April 2021 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 $49.8 million and $38.5 million at September 30, 2015 and December 31, 2014, respectively, which as of September 30, 2015, were accruing interest at rates ranging from 2.25% to 12.00%, with a weighted average rate of 4.34%.  Lease investments includes equipment with an amortized cost of $59.5 million and $48.8 million at September 30, 2015 and December 31, 2014, respectively, that is pledged as collateral on these notes.

The Company had a $40.0 million10-year structured repurchase agreement as of September 30, 2015 and December 31, 2014, which bears interest at a fixed rate borrowing of 4.75% and expires in March 2016. The Company pledges mortgage-backed securities as collateral for the repurchase agreement and may be required to provide additional collateral based on the fair value of those securities.

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Operating Segments (Details) $ in Thousands	1 Months Ended	3 Months Ended			9 Months Ended
	Jul. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)		Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) segment		Sep. 30, 2014 USD ($)		Dec. 31, 2014 USD ($)
Segment Reporting Information [Line Items]
Number of segments | segment					3
Net interest income		$ 115,969		$ 95,612	$ 343,837		$ 231,012
Provision for credit losses		5,358		3,109	14,628		2,309
Non-interest income		82,251		61,087	246,468		137,627
Non-interest expense		134,266	[1]	142,201	406,923	[2]	296,278	[2]
Income tax expense		18,318		4,488	53,413		20,076
Net income		40,278		6,901	115,341		49,976
Total assets		14,950,101		14,504,597	14,950,101		14,504,597		$ 14,602,099
Proceeds from sale of mortgage servicing rights	$ 103,100				103,105		0
Taylor Capital Group, Inc.
Segment Reporting Information [Line Items]
Pretax merger related costs		319		27,200	9,600		28,300
Banking
Segment Reporting Information [Line Items]
Net interest income		104,714		88,863	313,192		219,248
Provision for credit losses		4,965		3,172	12,783		2,488
Non-interest income		31,572		27,965	94,197		77,842
Non-interest expense		88,276	[1]	117,325	271,248	[2]	252,952	[2]
Income tax expense		12,178		(1,287)	35,509		9,345
Net income		30,867		(2,382)	87,849		32,305
Total assets		12,759,341		12,678,459	12,759,341		12,678,459
Leasing
Segment Reporting Information [Line Items]
Net interest income		2,832		3,216	8,762		8,231
Provision for credit losses		242		(58)	1,598		(174)
Non-interest income		19,987		16,299	61,383		42,716
Non-interest expense		11,382	[1]	9,721	34,866	[2]	28,171	[2]
Income tax expense		4,398		3,693	13,218		8,649
Net income		6,797		6,159	20,463		14,301
Total assets		956,433		823,813	956,433		823,813
Mortgage Banking
Segment Reporting Information [Line Items]
Net interest income		8,423		3,533	21,883		3,533
Provision for credit losses		151		(5)	247		(5)
Non-interest income		30,692		16,823	90,888		17,069
Non-interest expense		34,608	[1]	15,155	100,809	[2]	15,155	[2]
Income tax expense		1,742		2,082	4,686		2,082
Net income		2,614		3,124	7,029		3,370
Total assets		$ 1,234,327		$ 1,002,325	$ 1,234,327		$ 1,002,325

[1] Includes merger related expenses of $319 thousand and $27.2 million in the banking segment for the three months ended September 30, 2015 and 2014, respectively.

[2] Includes merger related expenses of $9.6 million and $28.3 million in the banking segment for the nine months ended September 30, 2015 and 2014, respectively.

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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2015		Sep. 30, 2014	Sep. 30, 2015		Sep. 30, 2014
Loans:
Taxable	$ 100,573		$ 79,902	$ 298,187		$ 187,497
Nontaxable	2,283		2,265	6,716		6,819
Investment securities:
Taxable	9,655		11,028	29,591		27,968
Nontaxable	10,752		9,041	30,005		25,393
Federal funds sold	0		14	0		23
Other interest earning accounts	89		211	208		601
Total interest income	123,352		102,461	364,707		248,301
Interest expense:
Deposits	5,102		4,615	14,301		12,138
Short-term borrowings	395		231	1,027		426
Long-term borrowings and junior subordinated notes	1,886		2,003	5,542		4,725
Total interest expense	7,383		6,849	20,870		17,289
Net interest income	115,969		95,612	343,837		231,012
Provision for credit losses	5,358		3,109	14,628		2,309
Net interest income after provision for credit losses	110,611		92,503	329,209		228,703
Non-interest income:
Lease financing, net	20,000		17,719	60,644		45,768
Mortgage banking revenue	30,692		16,823	90,884		17,069
Commercial deposit and treasury management fees	11,472		9,345	33,572		23,595
Trust and asset management fees	6,002		5,712	17,468		16,324
Card fees	3,335		3,836	11,671		9,841
Capital markets and international banking fees	2,357		1,472	5,793		3,810
Consumer and other deposit service fees	3,499		3,362	9,842		9,453
Brokerage fees	1,281		1,145	4,502		3,826
Loan service fees	1,531		1,069	4,369		2,950
Increase in cash surrender value of life insurance	852		855	2,527		2,516
Net gain (loss) on investment securities	371		(3,246)	(173)		(3,016)
Net gain (loss) on sale of assets	1		(7)	(2)		(24)
Gain on extinguishment of debt	0		1,895	0		1,895
Other operating income	858		1,107	5,371		3,620
Total non-interest income	82,251		61,087	246,468		137,627
Non-interest expenses:
Salaries and employee benefits	87,891		79,492	258,822		170,491
Occupancy and equipment	12,458		11,742	37,575		30,852
Computer services and telecommunication	8,567		11,506	26,008		21,669
Advertising and marketing	2,578		2,235	7,521		6,537
Professional and legal	1,801		8,864	6,884		12,210
Other intangibles amortization	1,542		1,470	4,569		3,884
Branch exit and facilities impairment charges	70		0	7,899		0
Net loss recognized on other real estate owned and other related expenses	577		2,178	2,197		3,289
Prepayment fees on interest bearing liabilities	0		0	85		0
Other operating expenses	18,782		24,714	55,363		47,346
Total non-interest expenses	134,266	[1]	142,201	406,923	[2]	296,278	[2]
Income before income taxes	58,596		11,389	168,754		70,052
Income tax expense	18,318		4,488	53,413		20,076
Net income	40,278		6,901	115,341		49,976
Dividends on preferred shares	2,000		2,000	6,000		2,000
Net income available to common stockholders	$ 38,278		$ 4,901	$ 109,341		$ 47,976
Common share data:
Basic earnings per common share	$ 0.52		$ 0.08	$ 1.47		$ 0.83
Diluted earnings per common share	$ 0.51		$ 0.08	$ 1.45		$ 0.82
Weighted average common shares outstanding for basic earnings per common share	74,297,281		63,972,902	74,478,164		57,795,094
Diluted weighted average common shares outstanding for diluted earnings per common share	75,029,827		64,457,978	75,154,585		58,341,927

[1] Includes merger related expenses of $319 thousand and $27.2 million in the banking segment for the three months ended September 30, 2015 and 2014, respectively.

[2] Includes merger related expenses of $9.6 million and $28.3 million in the banking segment for the nine months ended September 30, 2015 and 2014, respectively.

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Business Combination

9 Months Ended

Sep. 30, 2015

Business Combinations [Abstract]

Business Combination

Business Combination

On August 18, 2014, the Company acquired Taylor Capital Group, Inc. (“Taylor Capital”), a bank holding company and the parent company of Cole Taylor Bank, a commercial bank headquartered in Chicago, through the merger (the “Merger”) of Taylor Capital with and into the Company, followed immediately by the merger of Cole Taylor Bank with and into MB Financial Bank. This transaction solidified the Company's market position in Chicago and diversified its revenue streams. At the effective time of the Merger (the “Effective Time”), each share of the common stock of Taylor Capital and each share of nonvoting convertible preferred stock of Taylor Capital converted into the right to receive (1) 0.64318 of a share of the common stock of the Company, and (2) $4.08 in cash. All “in-the-money” Taylor Capital stock options and warrants outstanding immediately prior to the Effective Time were canceled in exchange for the right to receive a cash payment as provided in the merger agreement, as were the outstanding unvested restricted stock awards of Taylor Capital; however, the cash consideration payable for such restricted stock awards will remain subject to vesting or other lapse restrictions. Each share of Taylor Capital’s perpetual non-cumulative preferred stock, Series A, converted into the right to receive one share of the Company’s perpetual non-cumulative preferred stock, Series A.

The Company issued approximately 19.6 million shares of common stock and paid approximately $129.5 million in cash in the Merger. For the “in-the-money” Taylor Capital stock options and warrants, the Company paid in the aggregate approximately $4.4 million in cash. For the outstanding unvested Taylor Capital restricted stock awards, the Company will pay or has paid in the aggregate up to approximately $3.7 million in cash, as and to the extent such awards vest. The $129.5 million cash consideration includes payments for the Taylor Capital stock options, warrants and restricted stock awards.

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.  As the consideration paid for Taylor Capital exceeded the net assets acquired, goodwill of $288.2 million was recorded on the acquisition and was 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 have been determined to be final as of March 31, 2015.

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

	August 18,
	2014
ASSETS
Cash and cash equivalents	$	154,684
Investment securities available for sale	826,691
Investment securities held to maturity	22,599
Non-marketable securities - FRB and FHLB Stock	50,620
Loans held for sale	670,671
Loans	3,532,211
Leases investments	11,885
Premises and equipment	19,701
Goodwill	288,152
Core deposit intangible	20,079
Mortgage servicing rights	224,453
Other real estate owned	4,720
Other assets	130,478
Total assets	$	5,956,944
LIABILITIES
Deposits	$	3,953,213
Short-term borrowings	1,035,800
Junior subordinated notes issued to capital trusts	80,843
Accrued expenses and other liabilities	123,028
Total liabilities	$	5,192,884
Series A preferred stock at $28.82 per share at August 15, 2014	$	115,280
Total identifiable net assets less Series A preferred stock	$	648,780
Consideration excluding Series A preferred stock:
Market value of common stock at $26.49 per share at August 15, 2014 (19,602,482 shares of common stock issued)	$	519,270
Cash paid	129,510
Total fair value of consideration, excluding Series A preferred stock	$	648,780

The Company's Series A preferred stock was valued based upon the closing price of Taylor Capital's Series A preferred stock on August 15, 2014, the last trading day before the Merger date.

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 (computed on a loan by loan basis) and the principal outstanding is accreted over the remaining life of the loans. We anticipate recording a provision for the acquired portfolio in future quarters related to renewing Taylor Capital loans which will largely offset the accretion from the pass rated loans.

In accordance with ASC 310-30, for both purchased non-impaired loans and purchased credit-impaired loans ("PCI 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 following table presents the acquired loans as of the acquisition date (in thousands):

	PCI Loans			Non-PCI Loans
Contractually required principal and interest payments	$	244,650		$	3,707,463
Contractually required interest payments not expected to be collected due to estimated prepayments	—			(302,329		)
Nonaccretable difference	(34,219		)	—
Cash flows expected to be collected	210,431			3,405,134
Accretable difference	(5,626		)	(77,728		)
Fair value of acquired loans	$	204,805		$	3,327,406

The Company recorded $9.6 million and $28.3 million in pre-tax merger related expenses for the nine months endedSeptember 30, 2015 and 2014, respectively. These merger related expenses primarily relate to retention and severance compensation costs, professional and legal fees and branch exit and facilities impairment charges. The data processing systems were converted in September 2014.

The following table provides the unaudited pro forma information for the results of operations for the three and nine months endedSeptember 30, 2014, as if the acquisition had occurred January 1, 2014. The pro forma results combine the historical results of Taylor Capital into the Company's consolidated statement of operations including the impact of certain purchase 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, 2014. 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. Net income in the table below includes merger related expenses.

	Pro Forma
	Three Months Ended		Nine Months Ended
	September 30, 2014		September 30, 2014
(in thousands)
Total revenues (net interest income plus non-interest income)	$	199,207	$	583,483
Net income	11,156		77,527

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

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Earnings Per Common Share

9 Months Ended

Sep. 30, 2015

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,
	2015		2014			2015		2014
Distributed earnings allocated to common stock	$	12,733	$	10,545		$	36,227	$	23,877
Undistributed earnings	27,545		(3,644		)	79,114		26,099
Net income	40,278		6,901			115,341		49,976
Less: preferred stock dividends	2,000		2,000			6,000		2,000
Net income available to common stockholders	38,278		4,901			109,341		47,976
Less: earnings allocated to participating securities	2		—			5		1
Earnings allocated to common stockholders	$	38,276	$	4,901		$	109,336	$	47,975
Weighted average shares outstanding for basic earnings per common share	74,297,281		63,972,902			74,478,164		57,795,094
Dilutive effect of equity awards	732,546		485,076			676,421		546,833
Weighted average shares outstanding for diluted earnings per common share	75,029,827		64,457,978			75,154,585		58,341,927
Basic earnings per common share	$	0.52	$	0.08		$	1.47	$	0.83
Diluted earnings per common share	0.51		0.08			1.45		0.82

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Derivative Financial Instruments

9 Months Ended

Sep. 30, 2015

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, 2015 was approximately $1 thousand, and the net amount payable as of December 31, 2014 was approximately $1.1 million.  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, 2015, the Company’s credit exposure relating to interest rate swaps was approximately $33.7 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 $165 thousand at September 30, 2015.  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 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 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, 2015 and December 31, 2014 (in thousands):

	Asset Derivatives								Liability Derivatives
	September 30, 2015				December 31, 2014				September 30, 2015					December 31, 2014
	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)	$	—	$	—	$	—	$	—	$	165	$	(11	)	$	197	$	(15	)
Stand-alone derivative instruments: (2)
Interest rate swap contracts	2,214,393		53,421		1,509,930		37,039		1,276,393		(40,498		)	2,001,787		(30,761		)
Interest rate options contracts	138,049		186		55,830		283		138,049		(186		)	55,830		(283		)
Foreign exchange contracts	64,368		4,094		27,402		2,276		64,686		(3,857		)	27,002		(2,109		)
Spot foreign exchange contracts	1,096		12		512		5		684		(3		)	304		(18		)
Mortgage related derivatives	865,162		8,697		871,446		6,785		975,000		(9,063		)	879,841		(7,313		)
Total stand-alone derivative instruments	3,283,068		66,410		2,465,120		46,388		2,454,812		(53,607		)	2,964,764		(40,484		)
Total	$	3,283,068	$	66,410	$	2,465,120	$	46,388	$	2,454,977	$	(53,618	)	$	2,964,961	$	(40,499	)

⁽¹⁾ Hedged fixed-rate commercial real estate loans

⁽²⁾ These stand-alone derivative instruments 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,
	2015			2014			2015			2014
Derivative instruments designated as hedges of fair value:
Interest rate swap contracts	$	2		$	(1,869	)	$	4		$	(1,871	)
Stand-alone derivative instruments:
Interest rate swap contracts	22,862			(312		)	8,623			(294		)
Interest rate options contracts	541			—			—			—
Foreign exchange contracts	(95		)	4			91			61
Spot foreign exchange contracts	(4		)	(17		)	22			(9		)
Mortgage related derivatives	(13,183		)	1,514			(9,408		)	1,554
Total stand-alone derivative instruments	10,121			1,189			(672		)	1,312
Total	$	10,123		$	(680	)	$	(668	)	$	(559	)

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, 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	$	16,606	$	—	$	16,606	$	40,509	$	—	$	40,509
Foreign exchange contracts	3,031		—		3,031		1,971		—		1,971
Mortgage related derivatives	554		—		554		9,082		—		9,082
Total derivatives	20,191		—		20,191		51,562		—		51,562
Repurchase agreements	—		—		—		262,009		—		262,009
Total	$	20,191	$	—	$	20,191	$	313,571	$	—	$	313,571

	Financial Assets										Financial Liabilities
	Net Amount Recognized		Financial Instruments			Collateral			Net Amount		Net Amount Recognized		Financial Instruments			Collateral			Net Amount
Derivatives:
Counterparty A	$	11,420	$	(5,966	)	$	(5,454	)	$	—	$	5,966	$	(5,966	)	$	—		$	—
Counterparty B	15		(15		)	—			—		9,803		(15		)	(9,788		)	—
Counterparty C	5,948		(5,948		)	—			—		15,275		(5,948		)	(9,327		)	—
Other counterparties	2,808		(2,808		)	—			—		20,518		(2,808		)	(16,808		)	902
Total derivatives	20,191		(14,737		)	(5,454		)	—		51,562		(14,737		)	(35,923		)	902
Repurchase agreements	—		—			—			—		262,009		—			(262,009		)	—
Total	$	20,191	$	(14,737	)	$	(5,454	)	$	—	$	313,571	$	(14,737	)	$	(297,932	)	$	902

Information about the Company's financial instruments that are eligible for offset in the consolidated balance sheet as of December 31, 2014 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	$	10,727	$	—	$	10,727	$	29,916	$	—	$	29,916
Foreign exchange contracts	1,525		—		1,525		709		—		709
Mortgage related derivatives	1,700		—		1,700		7,302		—		7,302
Total derivatives	13,952		—		13,952		37,927		—		37,927
Repurchase agreements	—		—		—		219,824		—		219,824
Total	$	13,952	$	—	$	13,952	$	257,751	$	—	$	257,751

	Financial Assets									Financial Liabilities
	Net Amount Recognized		Financial Instruments			Collateral		Net Amount		Net Amount Recognized		Financial Instruments			Collateral			Net Amount
Derivatives:
Counterparty A	$	13	$	(13	)	$	—	$	—	$	9,556	$	(13	)	$	(9,543	)	$	—
Counterparty B	145		(145		)	—		—		3,736		(145		)	(3,591		)	—
Counterparty C	6,123		(6,123		)	—		—		10,335		(6,122		)	(4,213		)	—
Other counterparties	7,671		(3,920		)	—		3,751		14,300		(3,920		)	(8,663		)	1,717
Total derivatives	13,952		(10,201		)	—		3,751		37,927		(10,200		)	(26,010		)	1,717
Repurchase agreements	—		—			—		—		219,824		—			(219,824		)	—
Total	$	13,952	$	(10,201	)	$	—	$	3,751	$	257,751	$	(10,200	)	$	(245,834	)	$	1,717

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Junior Subordinated Notes Issued to Capital Trusts

9 Months Ended

Sep. 30, 2015

Junior Subordinated Notes Issued To Capital Trusts

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 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, 2015 (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

(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 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 $7.2 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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Goodwill and Intangibles

9 Months Ended

Sep. 30, 2015

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, 2015 or 2014.   The carrying amount of goodwill was $711.5 million at September 30, 2015 and December 31, 2014.

The Company has other intangible assets consisting of core deposit and client relationship intangibles that had a remaining weighted average amortization period of approximately 6 years as of September 30, 2015. Core deposit and client relationship intangibles increased by $4.1 million due to the acquisition of the Illinois court-appointed guardianship and special needs trust business of JPMorgan Chase in August 2015.

The following table presents the changes during the nine months ended September 30, 2015 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, 2015 (in thousands):

	September 30, 2015
Balance at beginning of period	$	38,006
Amortization expense	(4,569		)
Other intangibles from acquisition	4,083
Balance at end of period	$	37,520
Gross carrying amount	$	84,454
Accumulated amortization	(46,934		)
Net book value	$	37,520

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

Year ending December 31,	Amount
2015	$	1,546
2016	5,523
2017	4,943
2018	4,526
2019	3,040
Thereafter	17,942
	$	37,520

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Goodwill and Intangibles (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015
Changes in the carrying amount of core deposit and client relationship intangibles
Balance at beginning of period			$ 38,006
Amortization expense	$ (1,542)	$ (1,470)	(4,569)	$ (3,884)
Other intangibles from acquisition			4,083
Balance at end of period	37,520		37,520
Gross carrying amount					$ 84,454
Accumulated amortization					(46,934)
Net book value	$ 37,520		$ 38,006		$ 37,520

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Investment Securities

9 Months Ended

Sep. 30, 2015

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, 2015
Available for Sale
U.S. Government sponsored agencies and enterprises	$	64,008	$	1,453	$	—		$	65,461
States and political subdivisions	379,015		20,289		(30		)	399,274
Residential mortgage-backed securities	683,955		10,379		(1,109		)	693,225
Commercial mortgage-backed securities	150,836		3,618		(253		)	154,201
Corporate bonds	228,711		1,843		(2,303		)	228,251
Equity securities	10,701		125		—			10,826
Total Available for Sale	1,517,226		37,707		(3,695		)	1,551,238
Held to Maturity
States and political subdivisions	1,002,963		30,098		(2,053		)	1,031,008
Residential mortgage-backed securities	221,889		10,315		—			232,204
Total Held to Maturity	1,224,852		40,413		(2,053		)	1,263,212
Total	$	2,742,078	$	78,120	$	(5,748	)	$	2,814,450
December 31, 2014
Available for Sale
U.S. Government sponsored agencies and enterprises	$	64,612	$	1,281	$	(20	)	$	65,873
States and political subdivisions	390,076		20,846		(68		)	410,854
Residential mortgage-backed securities	713,413		8,977		(1,827		)	720,563
Commercial mortgage-backed securities	186,110		1,772		(220		)	187,662
Corporate bonds	259,526		2,428		(2,751		)	259,203
Equity securities	10,531		66		—			10,597
Total Available for Sale	1,624,268		35,370		(4,886		)	1,654,752
Held to Maturity
States and political subdivisions	752,558		30,089		(382		)	782,265
Residential mortgage-backed securities	240,822		11,974		—			252,796
Total Held to Maturity	993,380		42,063		(382		)	1,035,061
Total	$	2,617,648	$	77,433	$	(5,268	)	$	2,689,813

The Company has no direct exposure to the State of Illinois, but approximately 22% of the state and political subdivisions portfolio consisted of securities issued by municipalities located in Illinois as of September 30, 2015. Approximately 95% of such securities were general obligation issues as of September 30, 2015.

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, 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	$	8,600	$	(29	)	$	1,454	$	(1	)	$	10,054	$	(30	)
Residential mortgage-backed securities	125,856		(650		)	38,702		(459		)	164,558		(1,109		)
Commercial mortgage-backed securities	11,861		(253		)	—		—			11,861		(253		)
Corporate bonds	47,537		(328		)	9,025		(1,975		)	56,562		(2,303		)
Total Available for Sale	193,854		(1,260		)	49,181		(2,435		)	243,035		(3,695		)
Held to Maturity
States and political subdivisions	188,854		(1,890		)	6,731		(163		)	195,585		(2,053		)
Total	$	382,708	$	(3,150	)	$	55,912	$	(2,598	)	$	438,620	$	(5,748	)

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, 2014 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
U.S. Government sponsored agencies and enterprises	$	9,644	$	(20	)	$	—	$	—		$	9,644	$	(20	)
States and political subdivisions	7,784		(21		)	3,558		(47		)	11,342		(68		)
Residential mortgage-backed securities	235,818		(1,336		)	29,373		(491		)	265,191		(1,827		)
Commercial mortgage-backed securities	89,509		(220		)	—		—			89,509		(220		)
Corporate bonds	62,693		(1,159		)	9,675		(1,592		)	72,368		(2,751		)
Total Available for Sale	405,448		(2,756		)	42,606		(2,130		)	448,054		(4,886		)
Held to Maturity
States and political subdivisions	28,786		(130		)	14,238		(252		)	43,024		(382		)
Total	$	434,234	$	(2,886	)	$	56,844	$	(2,382	)	$	491,078	$	(5,268	)

The total number of security positions in the investment portfolio in an unrealized loss position at September 30, 2015 was 214 compared to 168 at December 31, 2014. This increase, as well as the increase in securities in a continuous unrealized loss position from December 31, 2014 to September 30, 2015, was mainly attributable to securities issued by states and political subdivisions 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, 2015, management does not have the intent to sell any of the securities in the table above 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, 2015, management believes the impairments detailed in the table above 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,
	2015		2014			2015			2014
Realized gains	$	371	$	921		$	1,454		$	1,246
Realized losses	—		(4,167		)	(1,627		)	(4,170		)
Impairment charges	—		—			—			(92		)
Net gains (losses)	$	371	$	(3,246	)	$	(173	)	$	(3,016	)

The amortized cost and fair value of investment securities as of September 30, 2015 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	$	19,082	$	19,156
Due after one year through five years	292,719		294,245
Due after five years through ten years	37,547		39,016
Due after ten years	322,386		340,569
Equity securities	10,701		10,826
Residential and commercial mortgage-backed securities	834,791		847,426
	1,517,226		1,551,238
Held to maturity:
Due in one year or less	72,969		73,139
Due after one year through five years	202,217		204,617
Due after five years through ten years	101,102		105,490
Due after ten years	626,675		647,762
Residential mortgage-backed securities	221,889		232,204
	1,224,852		1,263,212
Total	$	2,742,078	$	2,814,450

Investment securities with a carrying amount of $1.4 billion at September 30, 2015 and $1.5 billion at December 31, 2014 were pledged as collateral on public deposits and for other purposes as required or permitted by law, while only $1.1 billion and $980.4 million were required to be pledged at September 30, 2015 and December 31, 2014, respectively. Of those pledged, the Company had investment securities pledged as collateral for advances from the Federal Home Loan Bank of $111.1 million and $226.9 million at September 30, 2015 and December 31, 2014, respectively.

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Loans

9 Months Ended

Sep. 30, 2015

Receivables [Abstract]

Loans

Loans

Loans consist of the following at (in thousands):

	September 30, 2015		December 31, 2014
Commercial loans	$	3,440,632	$	3,245,206
Commercial loans collateralized by assignment of lease payments	1,693,540		1,692,258
Commercial real estate	2,580,009		2,544,867
Residential real estate	607,171		503,287
Construction real estate	255,620		247,068
Indirect vehicle	345,731		268,840
Home equity	223,173		251,909
Other consumer loans	87,612		78,137
Total loans, excluding purchased credit-impaired loans	9,233,488		8,831,572
Purchased credit-impaired loans	155,693		251,645
Total loans	$	9,389,181	$	9,083,217

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 and asset-based 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 Company's Board of Directors' Enterprise Risk Committee on a regular basis.

Commercial Loans. Commercial credit is extended primarily to 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, powersports, recreational and marine 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 Company 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, 2015 and December 31, 2014, the Company had $3.5 billion and $2.0 billion, respectively, of loans pledged as collateral for long-term Federal Home Loan Bank advances and third party letters of credit, while only $1.8 billion and $1.3 billion were required to be pledged at September 30, 2015 and December 31, 2014, respectively.

The following table presents the contractual aging of the recorded investment in past due loans by class of loans as of September 30, 2015 and December 31, 2014 (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, 2015
Commercial	$	3,424,488	$	6,524	$	3,435	$	6,185	$	16,144	$	3,440,632
Commercial collateralized by assignment of lease payments	1,676,959		4,322		2,007		10,252		16,581		1,693,540
Commercial real estate
Healthcare	399,756		1,100		—		—		1,100		400,856
Industrial	368,596		—		—		793		793		369,389
Multifamily	383,603		874		1,542		1,371		3,787		387,390
Retail	423,888		1,379		4,161		1,774		7,314		431,202
Office	212,627		284		—		4,510		4,794		217,421
Other	767,781		3,294		1,429		1,247		5,970		773,751
Residential real estate	595,412		1,496		1,940		8,323		11,759		607,171
Construction real estate	255,620		—		—		—		—		255,620
Indirect vehicle	342,483		2,166		732		350		3,248		345,731
Home equity	213,828		1,584		1,918		5,843		9,345		223,173
Other consumer	87,233		191		120		68		379		87,612
Total loans, excluding purchased credit-impaired loans	9,152,274		23,214		17,284		40,716		81,214		9,233,488
Purchased credit-impaired loans	94,249		69		1,776		59,599		61,444		155,693
Total loans	$	9,246,523	$	23,283	$	19,060	$	100,315	$	142,658	$	9,389,181
Non-performing loan aging	$	50,258	$	3,981	$	1,734	$	40,604	$	46,319	$	96,577
December 31, 2014
Commercial	$	3,231,571	$	8,222	$	—	$	5,413	$	13,635	$	3,245,206
Commercial collateralized by assignment of lease payments	1,679,991		2,025		6,095		4,147		12,267		1,692,258
Commercial real estate
Healthcare	342,984		—		—		—		—		342,984
Industrial	333,907		944		—		3,182		4,126		338,033
Multifamily	417,504		1,377		—		1,517		2,894		420,398
Retail	432,718		2,481		652		2,325		5,458		438,176
Office	244,166		—		—		2,127		2,127		246,293
Other	754,031		307		2,421		2,224		4,952		758,983
Residential real estate	485,492		8,038		2,319		7,438		17,795		503,287
Construction real estate	246,731		—		—		337		337		247,068
Indirect vehicle	265,296		2,516		702		326		3,544		268,840
Home equity	242,756		2,717		1,039		5,397		9,153		251,909
Other consumer	78,106		16		12		3		31		78,137
Total loans, excluding purchased credit-impaired loans	8,755,253		28,643		13,240		34,436		76,319		8,831,572
Purchased credit-impaired loans	158,215		4,432		585		88,413		93,430		251,645
Total loans	$	8,913,468	$	33,075	$	13,825	$	122,849	$	169,749	$	9,083,217
Non-performing loan aging	$	46,149	$	5,764	$	1,099	$	34,075	$	40,938	$	87,087

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, 2015 and December 31, 2014 (in thousands):

	September 30, 2015				December 31, 2014
			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	$	22,639	$	—	$	14,088	$	—
Commercial collateralized by assignment of lease payments	8,113		3,713		2,404		3,566
Commercial real estate:
Healthcare	—		—		—		—
Industrial	1,216		—		6,371		—
Multifamily	4,029		—		5,333		—
Office	3,209		—		3,644		464
Retail	4,510		—		2,986		—
Other	12,383		90		13,541		324
Residential real estate	17,656		416		17,311		—
Construction real estate	—		—		337		—
Indirect vehicle	1,563		—		1,542		—
Home equity	16,940		—		15,171		—
Other consumer	44		56		5		—
Total	$	92,302	$	4,275	$	82,733	$	4,354

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, 2015 and December 31, 2014 (in thousands):

	Pass		Special Mention		Substandard		Doubtful		Total
September 30, 2015
Commercial	$	3,160,263	$	167,652	$	112,717	$	—	$	3,440,632
Commercial collateralized by assignment of lease payments	1,681,021		3,098		9,421		—		1,693,540
Commercial real estate
Healthcare	396,511		4,345		—		—		400,856
Industrial	350,058		17,498		1,833		—		369,389
Multifamily	381,766		737		4,887		—		387,390
Retail	420,428		5,930		4,844		—		431,202
Office	198,930		9,520		8,971		—		217,421
Other	724,466		12,896		36,389		—		773,751
Construction real estate	255,620		—		—		—		255,620
Total	$	7,569,063	$	221,676	$	179,062	$	—	$	7,969,801
December 31, 2014
Commercial	$	3,036,069	$	178,984	$	30,153	$	—	$	3,245,206
Commercial collateralized by assignment of lease payments	1,680,736		6,853		4,669		—		1,692,258
Commercial real estate
Healthcare	338,622		4,362		—		—		342,984
Industrial	314,225		8,817		14,991		—		338,033
Multifamily	412,824		920		6,654		—		420,398
Retail	423,842		2,740		11,594		—		438,176
Office	229,947		8,524		7,822		—		246,293
Other	708,447		22,013		28,523		—		758,983
Construction real estate	246,204		527		337		—		247,068
Total	$	7,390,916	$	233,740	$	104,743	$	—	$	7,729,399

Approximately $56.1 million and $49.1 million of the substandard and doubtful loans were non-performing as of September 30, 2015 and December 31, 2014, 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, 2015 and December 31, 2014 (in thousands):

	Performing		Non-performing		Total
September 30, 2015
Residential real estate	$	589,099	$	18,072	$	607,171
Indirect vehicle	344,168		1,563		345,731
Home equity	206,233		16,940		223,173
Other consumer	87,512		100		87,612
Total	$	1,227,012	$	36,675	$	1,263,687
December 31, 2014
Residential real estate	$	485,976	$	17,311	$	503,287
Indirect vehicle	267,297		1,543		268,840
Home equity	236,739		15,170		251,909
Other consumer	78,132		5		78,137
Total	$	1,068,144	$	34,029	$	1,102,173

The following tables present loans individually evaluated for impairment by class of loans, excluding purchased credit-impaired loans, as of September 30, 2015 and December 31, 2014 (in thousands):

	September 30, 2015
									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	$	7,080	$	7,080	$	—	$	—	$	4,009	$	—	$	7,254	$	—
Commercial collateralized by assignment of lease payments	—		—		—		—		—		—		1,495		47
Commercial real estate:
Healthcare	—		—		—		—		—		—		—		—
Industrial	3,053		3,053		—		—		3,232		—		4,923		—
Multifamily	1,754		1,754		—		—		1,874		—		1,859		17
Retail	5,072		2,119		2,953		—		3,342		—		824		—
Office	2,379		1,802		577		—		2,396		—		1,318		—
Other	811		800		11		—		849		—		1,514		—
Residential real estate	970		970		—		—		949		—		482		—
Construction real estate	—		—		—		—		—		—		—		—
Indirect vehicle	—		—		—		—		—		—		—		—
Home equity	1,327		927		400		—		1,327		—		667		—
Other consumer	—		—		—		—		—		—		—		—
With an allowance recorded:
Commercial	29,245		29,245		—		7,943		30,590		—		9,500		—
Commercial collateralized by assignment of lease payments	7,208		6,724		484		2,618		6,982		18		3,728		94
Commercial real estate:
Healthcare	—		—		—		—		—		—		—		—
Industrial	820		793		27		22		839		—		33		—
Multifamily	1,037		1,037		—		78		1,148		—		4,856		27
Retail	4,790		4,790		—		1,326		4,046		—		7,433		—
Office	2,174		2,174		—		1,697		2,215		—		2,297		—
Other	11,032		11,032		—		—		12,007		—		13,265		—
Residential real estate	15,215		13,263		1,952		2,834		12,867		—		14,083		—
Construction real estate	—		—		—		—		—		—		431		—
Indirect vehicle	215		131		84		8		272		—		310		—
Home equity	30,896		28,593		2,303		2,478		28,380		—		27,299		—
Other consumer	—		—		—		—		—		—		—		—
Total	$	125,078	$	116,287	$	8,791	$	19,004	$	117,324	$	18	$	103,571	$	185

	December 31, 2014
									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	$	9,752	$	8,992	$	760	$	—	$	10,324	$	—
Commercial collateralized by assignment of lease payments	2,316		2,316		—		—		2,569		121
Commercial real estate:
Healthcare	—		—		—		—		—		—
Industrial	9,115		5,858		3,257		—		7,870		—
Multifamily	1,733		1,733		—		—		1,928		52
Retail	2,025		813		1,212		—		3,465		—
Office	—		—		—		—		1,127		—
Other	1,479		1,465		14		—		5,249		—
Residential real estate	1,941		1,941		—		—		2,740		—
Construction real estate	—		—		—		—		34		—
Indirect vehicle	—		—		—		—		—		—
Home equity	577		577		—		—		762		—
Other consumer	—		—		—		—		—		—
With an allowance recorded:
Commercial	7,987		7,987		—		2,395		14,227		—
Commercial collateralized by assignment of lease payments	715		715		—		105		1,515		91
Commercial real estate:
Healthcare	—		—		—		—		—		—
Industrial	517		513		4		130		4,982		—
Multifamily	5,680		4,709		971		996		6,354		131
Retail	9,264		7,897		1,367		720		8,547		—
Office	4,528		2,986		1,542		545		2,833		—
Other	12,612		12,527		85		136		11,022		12
Residential real estate	14,234		14,234		—		3,126		14,632		—
Construction real estate	2,707		337		2,370		162		455		—
Indirect vehicle	227		227		—		14		358		—
Home equity	25,927		25,705		222		2,153		25,672		—
Other consumer	—		—		—		—		—		—
Total	$	113,336	$	101,532	$	11,804	$	10,482	$	126,665	$	407

Impaired loans included accruing restructured loans of $20.1 million and $15.6 million that have been modified and are performing in accordance with those modified terms as of September 30, 2015 and December 31, 2014, respectively.  In addition, impaired loans included $21.4 million and $25.8 million of non-performing restructured loans as of September 30, 2015 and December 31, 2014, 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, 2015 and December 31, 2014, there was one A/B structure with a recorded investment of $1.0 million, 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, 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

The following table presents loans that were restructured during the three months ended September 30, 2014 (dollars in thousands):

	September 30, 2014
	Number of Loans	Pre-Modification Recorded Investment		Post-Modification Recorded Investment		Charge-offs and Specific Reserves
Non-Performing:
Residential real estate	2	$	411	$	411	$	246
Indirect vehicle	15	95		95		38
Home equity	6	604		604		104
Total	23	$	1,110	$	1,110	$	388

The following table presents loans that were restructured during the nine months endedSeptember 30, 2014 (dollars in thousands):

	September 30, 2014
	Number of Loans	Pre-Modification Recorded Investment		Post-Modification Recorded Investment		Charge-offs and Specific Reserves
Performing:
Indirect vehicle	1	$	5	$	5	$	—
Home equity	6	1,883		1,883		—
Total	7	$	1,888	$	1,888	$	—
Non-Performing:
Commercial	1	$	263	$	263	$	85
Commercial real estate:
Multifamily	1	158		158		40
Residential real estate	6	1,850		1,850		246
Indirect vehicle	44	262		262		65
Home equity	13	1,667		1,667		104
Total	65	$	4,200	$	4,200	$	540

Of the troubled debt restructurings entered into during the past twelve months, $224 thousand subsequently defaulted during the nine months endedSeptember 30, 2015.  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, 2015 (in thousands):

	Performing			Non-performing
Beginning balance	$	15,603		$	25,771
Additions	4,370			1,897
Charge-offs	—			(244		)
Principal payments, net	(281		)	(631		)
Removals	(3,417		)	(1,113		)
Transfer to other real estate owned	—			(482		)
Transfers in	4,034			189
Transfers out	(189		)	(4,034		)
Ending balance	$	20,120		$	21,353

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, 2015 (in thousands):

	September 30, 2015
	Extended
	Maturity,				Delay in
	Amortization		Extended		Payments or
	and Reduction		Maturity and/or		Reduction of
	of Interest Rate		Amortization		Interest Rate		Total
Commercial	$	—	$	—	$	80	$	80
Commercial real estate:
Multifamily	—		334		—		334
Residential real estate	140		—		—		140
Indirect vehicle	—		—		75		75
Home equity	2,541		267		2,830		5,638
Total	$	2,681	$	601	$	2,985	$	6,267

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, 2015 and 2014 (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, 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

	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, 2014
Allowance for credit losses:
Three Months Ended
Beginning balance	$	23,154	$	9,425		$	43,933		$	7,495		$	4,613		$	1,727	$	8,281	$	2,282		$	2,995		$	103,905
Allowance for unfunded credit commitments acquired through business combination	—		—			—			—			—			—		—		—			1,261			1,261
Utilization of allowance for unfunded credit commitments	—		—			—			—			—			—		—		—			(637		)	(637		)
Charge-offs	606		—			1,027			740			5			1,043		566		497			—			4,484
Recoveries	564		425			2,227			4			25			402		46		65			—			3,758
Provision	2,181		(484		)	(4,193		)	534			2,174			643		1,836		(65		)	483			3,109
Ending balance	$	25,293	$	9,366		$	40,940		$	7,293		$	6,807		$	1,729	$	9,597	$	1,785		$	4,102		$	106,912
Nine Months Ended
Beginning balance	$	23,461	$	9,159		$	51,628		$	8,872		$	6,856		$	1,662	$	8,478	$	1,630		$	1,716		$	113,462
Allowance for unfunded credit commitments acquired through business combination	—		—			—			—			—			—		—		—			1,261			1,261
Utilization of allowance for unfunded credit commitments	—		—			—			—			—			—		—		—			(637		)	(637		)
Charge-offs	1,142		40			9,910			1,438			75			2,546		2,002		1,582			—			18,735
Recoveries	2,888		555			3,279			529			201			1,283		306		211			—			9,252
Provision	86		(308		)	(4,057		)	(670		)	(175		)	1,330		2,815		1,526			1,762			2,309
Ending balance	$	25,293	$	9,366		$	40,940		$	7,293		$	6,807		$	1,729	$	9,597	$	1,785		$	4,102		$	106,912
Ending allowance balance attributable to loans:
Individually evaluated for impairment	$	2,250	$	238		$	3,153		$	3,196		$	161		$	27	$	1,690	$	—		$	1,316		$	12,031
Collectively evaluated for impairment	22,433		9,128			37,156			4,097			6,641			1,702		7,907		1,785			2,786			93,635
Acquired and accounted for under ASC 310-30 (1)	610		—			631			—			5			—		—		—			—			1,246
Total ending allowance balance	$	25,293	$	9,366		$	40,940		$	7,293		$	6,807		$	1,729	$	9,597	$	1,785		$	4,102		$	106,912
Loans:
Individually evaluated for impairment	$	18,850	$	6,211		$	49,077		$	15,811		$	337		$	212	$	25,562	$	—		$	—		$	116,060
Collectively evaluated for impairment	3,045,819		1,625,449			2,598,335			501,023			221,783			272,826		237,415		69,028			—			8,571,678
Acquired and accounted for under ASC 310-30 (1)	121,565		—			110,004			3,389			30,330			—		115		22,783			—			288,186
Total ending loans balance	$	3,186,234	$	1,631,660		$	2,757,416		$	520,223		$	252,450		$	273,038	$	263,092	$	91,811		$	—		$	8,975,924

⁽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. We anticipate recording a provision for the acquired portfolio in future quarters related to renewing Taylor loans which will largely offset the accretion from the pass rated 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, 2015, there was a negative provision for credit losses of $2.2 million and net recoveries of $2.7 million, in relation to 16 pools of purchased loans with a total carrying amount of $44.4 million as of September 30, 2015. There was $1.8 million and $1.3 million in allowance for loan and lease losses related to these purchased loans at September 30, 2015 and December 31, 2014, 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 nine months endedSeptember 30, 2015 and 2014 (in thousands):

	Three Months Ended					Nine Months Ended
	September 30,					September 30,
	2015			2014		2015			2014
Balance at beginning of period	$	11,456		$	1,218	$	7,434		$	2,337
Purchases	—			5,626		—			5,626
Accretion	(1,794		)	2,076		(5,541		)	383
Other (1)	590			931		8,359			1,505
Balance at end of period	$	10,252		$	9,851	$	10,252		$	9,851

⁽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, 2015	Purchased Credit-Impaired Loans		Purchased Non-Credit-Impaired Loans		Total
Covered loans:
Consumer related	$	18,959	$	—	$	18,959
Non-covered loans:
Commercial loans	37,189		796,449		833,638
Commercial loans collateralized by assignment of lease payments	—		100,708		100,708
Commercial real estate	47,803		715,026		762,829
Construction real estate	12,372		53,540		65,912
Consumer related	39,370		192,210		231,580
Total non-covered loans	136,734		1,857,933		1,994,667
Total acquired	$	155,693	$	1,857,933	$	2,013,626

Outstanding balances on purchased loans from the FDIC were $60.0 million and $95.1 million as of September 30, 2015 and December 31, 2014, respectively.  The related carrying amount on loans purchased from the FDIC was $62.2 million and $91.4 million as of September 30, 2015 and December 31, 2014, respectively.

Effective April 1, 2014, the losses on commercial related loans (commercial, commercial real estate and construction real estate) acquired in connection with the Heritage FDIC-assisted transaction ceased being covered under the loss-share agreement for that transaction. The carrying amount of those loans was $2.3 million as of September 30, 2015. 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 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 $1.5 million as of September 30, 2015. 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 and New Century FDIC-assisted transactions ceased to be covered under the loss-share agreements for those transactions. The carrying amount of those loans was $21.1 million as of September 30, 2015. 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 agreements through June 30, 2020.

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Deposits

9 Months Ended

Sep. 30, 2015

Banking and Thrift [Abstract]

Deposits

Deposits

The composition of deposits was as follows (in thousands):

	September 30,		December 31,
	2015		2014
Demand deposit accounts, noninterest bearing	$	4,434,067	$	4,118,256
NOW and money market accounts	4,129,414		3,913,765
Savings accounts	953,746		940,345
Certificates of deposit, $250,000 or more	811,850		838,928
Other certificates of deposit	925,501		1,179,648
Total	$	11,254,578	$	10,990,942

Certificates of deposit of $250,000 or more included $444.9 million and $485.3 million of brokered deposits at September 30, 2015 and December 31, 2014, 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 (Details 2) - USD ($)	Mar. 09, 2012	Sep. 30, 2015	Dec. 31, 2014
Short-term borrowings
Fixed interest rate Federal Home Loan Bank advances		$ 675,000,000	$ 700,000,000
Minimum
Short-term borrowings
Effective interest rate of amounts due within one year		0.13%
Maximum
Short-term borrowings
Effective interest rate of amounts due within one year		0.23%
Line of Credit [Member]
Short-term borrowings
Line of Credit Facility, Maximum Borrowing Capacity	$ 35,000,000.0
Description of annual interest rate basis	one month LIBOR
Libor [Member] | Line of Credit [Member]
Short-term borrowings
Debt Instrument, Basis Spread on Variable Rate	1.85%

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Junior Subordinated Notes Issued to Capital Trusts (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2015	Dec. 31, 2014
Junior Subordinated Notes
Principal balance		$ 186,068	$ 185,778
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 | 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 | 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 | 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 | 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 | 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 | 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 | 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		$ 7,200
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
Trust Preferred Securities | Coal City Capital Trust I
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
Trust Preferred Securities | MB Financial Capital Trust II
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
Trust Preferred Securities | MB Financial Capital Trust III
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
Trust Preferred Securities | MB Financial Capital Trust IV
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
Trust Preferred Securities | MB Financial Capital Trust V
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
Trust Preferred Securities | MB Financial Capital Trust VI
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
Trust Preferred Securities | FOBB Statutory Trust III
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
Trust Preferred Securities | TAYC Capital Trust II
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

[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 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 $7.2 million.

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Short-Term Borrowings (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Short-term borrowings
Weighted Average Interest Rate	0.18%	0.15%
Amount	$ 940,529	$ 931,415
Customer repurchase agreements
Short-term borrowings
Weighted Average Interest Rate	0.19%	0.21%
Amount	$ 262,009	$ 219,824
Federal Home Loan Bank advances
Short-term borrowings
Weighted Average Interest Rate	0.17%	0.13%
Amount	$ 675,000	$ 700,000
Federal funds purchased
Short-term borrowings
Weighted Average Interest Rate	0.10%	0.14%
Amount	$ 3,520	$ 11,591

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Junior Subordinated Notes Issued to Capital Trusts (Tables)

9 Months Ended

Sep. 30, 2015

Junior Subordinated Notes Issued To Capital Trusts

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, 2015 (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

(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 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 $7.2 million.

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Loans (Details 4) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Loans
Total loans, excluding purchased credit impaired loans	$ 9,233,488	$ 8,831,572
Residential real estate
Loans
Total loans, excluding purchased credit impaired loans	607,171	503,287
Indirect vehicle
Loans
Total loans, excluding purchased credit impaired loans	345,731	268,840
Home equity
Loans
Total loans, excluding purchased credit impaired loans	223,173	251,909
Other consumer loans
Loans
Total loans, excluding purchased credit impaired loans	87,612	78,137
Total
Loans
Total loans, excluding purchased credit impaired loans	1,263,687	1,102,173
Performing | Residential real estate
Loans
Total loans, excluding purchased credit impaired loans	589,099	485,976
Performing | Indirect vehicle
Loans
Total loans, excluding purchased credit impaired loans	344,168	267,297
Performing | Home equity
Loans
Total loans, excluding purchased credit impaired loans	206,233	236,739
Performing | Other consumer loans
Loans
Total loans, excluding purchased credit impaired loans	87,512	78,132
Performing | Total
Loans
Total loans, excluding purchased credit impaired loans	1,227,012	1,068,144
Non-performing loan aging | Residential real estate
Loans
Total loans, excluding purchased credit impaired loans	18,072	17,311
Non-performing loan aging | Indirect vehicle
Loans
Total loans, excluding purchased credit impaired loans	1,563	1,543
Non-performing loan aging | Home equity
Loans
Total loans, excluding purchased credit impaired loans	16,940	15,170
Non-performing loan aging | Other consumer loans
Loans
Total loans, excluding purchased credit impaired loans	100	5
Non-performing loan aging | Total
Loans
Total loans, excluding purchased credit impaired loans	$ 36,675	$ 34,029

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Fair Value Measurements

9 Months Ended

Sep. 30, 2015

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 shall not be 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, the Company uses an external valuation model that relies on internally developed inputs to estimate the fair value of its interest rate lock commitments which is based on unobservable inputs that reflect management’s assumptions and specific information about each borrower transaction and is classified in Level 3 of the hierarchy.

The following table summarizes financial assets and financial liabilities measured at fair value on a recurring basis as of September 30, 2015 and December 31, 2014, 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, 2015
Financial assets
Securities available for sale:
U.S Government sponsored agencies and enterprises	$	65,461	$	—	$	65,461	$	—
States and political subdivisions	399,274		—		398,811		463
Residential mortgage-backed securities	693,225		—		692,830		395
Commercial mortgage-backed securities	154,201		—		154,201		—
Corporate bonds	228,251		—		228,251		—
Equity securities	10,826		10,826		—		—
Loans held for sale	676,020		—		676,020		—
Loans	27,176		—		27,176		—
Mortgage servicing rights	148,097		—		—		148,097
Assets held in trust for deferred compensation	16,022		16,022		—		—
Derivative financial instruments	66,410		11,955		46,293		8,162
Financial liabilities
Other liabilities (1)	15,513		15,513		—		—
Derivative financial instruments	53,618		15,029		38,589		—
December 31, 2014
Financial assets
Securities available for sale:
U.S. Government sponsored agencies and enterprises	$	65,873	$	—	$	65,873	$	—
States and political subdivisions	410,854		—		410,391		463
Residential mortgage-backed securities	720,563		—		720,053		510
Commercial mortgage-backed securities	187,662		—		187,662		—
Corporate bonds	259,203		—		259,203		—
Equity securities	10,597		10,597		—		—
Loans held for sale	737,209		—		737,209		—
Mortgage servicing rights	235,402		—		—		235,402
Assets held in trust for deferred compensation	16,829		16,829		—		—
Derivative financial instruments	46,388		1,607		39,707		5,074
Financial liabilities
Other liabilities (1)	16,483		16,483		—		—
Derivative financial instruments	40,499		7,209		33,290		—

⁽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, 2015		Valuation Technique	Unobservable Input	Range
	(in thousands)
States and political subdivisions	$	463	Discounted cash flows	Credit assumption	45% Loss
Residential mortgage-backed securities	395		Discounted cash flows	Constant pre-payment rates (CPR)	1% - 3%
Mortgage servicing rights	148,097		Discounted cash flows	CPR	9.9% - 16.2%
				Discount rate	9.25 - 12.00
				Maturity (months)	327 - 357
				Delinquencies	0.51 - 3.80
				Costs to service	$ 60 - $ 160
				Costs to service - delinquent	$ 150 - $ 1,000
Derivative financial instruments (mortgage	8,162		Sales cash flows	Expected closing ratio	60% - 95%
interest rate lock commitments)				Expected delivery price	100.21 bps - 108.95 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, 2015 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, 2015
Weighted average CPR	13.60		%
Impact on fair value of 10% adverse change	$	(6,402	)
Impact on fair value of 20% adverse change	(12,278		)
Weighted average discount rate	9.56		%
Impact on fair value of 10% adverse change	$	(4,917	)
Impact on fair value of 20% adverse change	(9,521		)
Weighted average delinquency rate	1.84		%
Impact on fair value of 10% adverse change	$	(811	)
Impact on fair value of 20% adverse change	(1,772		)
Weighted average costs to service	$	81
Impact on fair value of 10% adverse change	(2,563		)
Impact on fair value of 20% adverse change	(5,126		)

The Company did not have any transfers between Level 1 and Level 2 of the fair value hierarchy during the nine months endedSeptember 30, 2015. 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,
	2015			2014			2015			2014		2015		2014
(in thousands)	Investment Securities						Mortgage Servicing Rights					Derivatives
Balance, beginning of period	$	973		$	5,856		$	235,402		$	—	$	5,074	$	—
Acquired through business combination	—			507			—			232,783		—		5,922
Purchases	—			—			785			489		—		—
Originations	—			—			55,583			8,587		—		—
Other comprehensive income	—			(71		)	—			7,517		—		(2,395		)
Included in earnings	—			—			(40,568		)	—		3,088		—
Principal payments	(115		)	(281		)	—			—		—		—
Impairment charge	—			(92		)	—			—		—		—
Sales	—			(4,565		)	(103,105		)	—		—		—
Balance, ending of period	$	858		$	1,354		$	148,097		$	249,376	$	8,162	$	3,527

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 (96% at September 30, 2015), 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, 2015 and December 31, 2014 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, 2015
Financial assets:
Impaired loans	$	82,275	$	—	$	—	$	82,275
Non-financial assets:
Foreclosed assets	43,628		—		—		43,628
December 31, 2014
Financial assets:
Impaired loans	$	61,717	$	—	$	—	$	61,717
Non-financial assets:
Foreclosed assets	38,619		—		—		38,619

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, 2015		Technique	Input	Range
	(in thousands)
Impaired loans	$	82,275	Appraisal of collateral	Appraisal adjustments - sales costs	5% - 10%
Foreclosed assets	43,628		Appraisal of collateral	Appraisal adjustments - sales costs	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 amount 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, 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	$	234,220	$	234,220	$	234,220	$	—	$	—
Interest earning deposits with banks	66,025		66,025		66,025		—		—
Federal funds sold	—		—		—		—		—
Investment securities available for sale	1,551,238		1,551,238		10,826		1,539,554		858
Investment securities held to maturity	1,224,852		1,263,212		—		1,263,212		—
Non-marketable securities - FHLB and FRB stock	91,400		91,400		—		—		91,400
Loans held for sale	676,020		676,020		—		676,020		—
Loans, net	9,264,555		9,285,678		—		27,176		9,258,502
Accrued interest receivable	51,195		51,195		51,195		—		—
Derivative financial instruments	66,410		66,410		11,955		46,293		8,162
Financial Liabilities:
Noninterest bearing deposits	$	4,434,067	$	4,434,067	$	4,434,067	$	—	$	—
Interest bearing deposits	6,820,511		6,825,784		—		—		6,825,784
Short-term borrowings	940,529		940,532		—		—		940,532
Long-term borrowings	95,175		97,252		—		—		97,252
Junior subordinated notes issued to capital trusts	186,068		115,618		—		—		115,618
Accrued interest payable	2,923		2,923		2,923		—		—
Derivative financial instruments	53,618		53,618		15,029		38,589		—

	December 31, 2014
	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	$	256,804	$	256,804	$	256,804	$	—	$	—
Interest earning deposits with banks	55,277		55,277		55,277		—		—
Investment securities available for sale	1,654,752		1,654,752		10,597		1,643,182		973
Investment securities held to maturity	993,380		1,035,061		—		1,035,061		—
Non-marketable securities - FHLB and FRB stock	75,569		75,569		—		—		75,569
Loans held for sale	737,209		737,209		—		737,209		—
Loans, net	8,973,191		8,956,494		—		—		8,956,494
Accrued interest receivable	49,065		49,065		49,065		—		—
Derivative financial instruments	46,388		46,388		1,607		39,707		5,074
Financial Liabilities:
Non-interest bearing deposits	$	4,118,256	$	4,118,256	$	4,118,256	$	—	$	—
Interest bearing deposits	6,872,686		6,877,349		—		—		6,877,349
Short-term borrowings	931,415		931,415		—		—		931,415
Long-term borrowings	82,916		86,025		—		—		86,025
Junior subordinated notes issued to capital trusts	185,778		122,408		—		—		122,408
Accrued interest payable	3,709		3,709		3,709		—		—
Derivative financial instruments	40,499		40,499		7,209		33,290		—

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New Authoritative Accounting Guidance (Policies)

9 Months Ended

Sep. 30, 2015

Accounting Changes and Error Corrections [Abstract]

New Authoritative Accounting Pronouncements

ASC Topic 310 “Receivables.” New authoritative accounting guidance under ASC Topic 310, “Receivables” amended prior guidance to clarify that an in substance repossession or foreclosure occurs, and a creditor is considered to have received physical

possession of residential real estate property collateralizing a consumer mortgage loan, upon either (1) the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure or (2) the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. Additionally, the amendments require interim and annual disclosures. The Company adopted this new authoritative guidance on January 1, 2015, and it did not have an impact on the Company's statements of operations or financial condition.

New authoritative accounting guidance under ASC Topic 310, “Receivables” amended prior guidance to require an entity to derecognize a mortgage loan and recognize a separate other receivable upon foreclosure if (i) the loan has a government guarantee that is not separable from the loan before foreclosure, (ii) at the time of foreclosure, the creditor has the intent to convey the real estate property to the guarantor and make a claim on that guarantee, and the creditor has the ability to recover under that claim, and (iii) at the time of foreclosure, any amount of the claim that is determined on the basis of the fair value of the real estate is fixed. The separate other receivable is to be measured based on the amount of the loan balance (principal and interest) expected to be recovered from the guarantor. The Company adopted this new authoritative guidance on January 1, 2015, and it did not have a material impact on the Company's statements of operations or financial condition.

ASC Topic 323 “Investments - Equity Method and Joint Ventures.” New authoritative accounting guidance under ASC Topic 323, “Investments - Equity Method and Joint Ventures” amended prior guidance to permit entities to make an accounting policy election to account for their investments in qualified affordable housing projects using the proportional amortization method if certain conditions are met. Under the proportional amortization method, an entity amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits received and recognizes the net investment performance in the statement of operation as a component of income tax expense. The Company adopted this new authoritative guidance on January 1, 2015, and it did not have an impact on the Company's statements of operations or financial condition.

ASC Topics 205 “Presentation of Financial Statements” and 360 “Property, Plant, and Equipment.” New authoritative accounting guidance under ASC Topic 205, “Presentation of Financial Statements” and ASC Topic 360 “Property, Plant, and Equipment” amended prior guidance to change the requirements for reporting discontinued operations. The disposal of a component of an entity or group of components of an entity is required to be reported in discontinued operations if the disposal represents a strategic shift that has (or will have) a major effect on an entity's operations and financial results. The new authoritative guidance also requires additional disclosures about discontinued operations. The Company adopted this new authoritative guidance on January 1, 2015, and it did not have an impact on the Company's statements of operations or financial condition.

ASC Topic 860 “Transfers and Servicing.” New authoritative accounting guidance under ASC Topic 860, “Transfers and Servicing” amended prior guidance to change the accounting for repurchase-to-maturity transactions to secured borrowing accounting and to require separate accounting for a transfer of a financial asset executed contemporaneously with a repurchase agreement with the same counterparty, which will result in secured borrowing accounting for the repurchase agreement. The new authoritative guidance also requires disclosures for a transfer of a financial asset accounted for as a sale and an agreement with the same transferee entered into in contemplation of the initial transfer that results in the transferor retaining substantially all of the exposure to the economic return on the transferred financial asset throughout the term of the transaction. In addition, it requires disclosures related to collateral, remaining contractual tenor and of the potential risks associated with repurchase agreements, securities lending transactions and repurchase-to-maturity transactions. The Company adopted this new authoritative guidance on January 1, 2015, and it did not have an impact on the Company's statements of operations or financial condition. The additional disclosures are included in Note 9. Short-Term Borrowings and Note 10. Long-Term Borrowings.

ASC Topic 718 “Compensation - Stock Compensation.” New authoritative accounting guidance under ASC Topic 718, “Compensation - Stock Compensation” amended prior guidance to require that a performance target that affects vesting and that could be achieved after the requisite service period be treated as a performance condition. The Company adopted this new authoritative guidance on January 1, 2015, 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. 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 225 “Income Statement - Extraordinary and Unusual Items.” New authoritative accounting guidance under ASC Topic 225, “Income Statement - Extraordinary and Unusual Items” amended prior guidance to eliminate the concept of extraordinary items. The new authoritative guidance will be effective for reporting periods after January 1, 2016 and is not expected to have a significant impact on the Company's statements of operations or financial condition.

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 new authoritative guidance will be effective for reporting periods after January 1, 2016 and is not expected to have a significant 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 new authoritative guidance will be effective for reporting periods after January 1, 2016 and is not expected to have a significant 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 income statement 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 acquisition date. The new authoritative guidance will be effective for reporting periods after January 1, 2016 and is not expected to have a significant impact on the Company's statements of operations or financial condition.

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Loans (Details 2) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	$ 9,233,488	$ 8,831,572
Total loans	$ 9,389,181	9,083,217	$ 8,975,924
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
Commercial loans
Contractual aging of the recorded investment in loans
Current	$ 3,424,488	3,231,571
30-59 Days Past Due	6,524	8,222
60-89 Days Past Due	3,435	0
Loans Past Due 90 Days or More	6,185	5,413
Total Past Due	16,144	13,635
Total loans, excluding covered loans	3,440,632	3,245,206
Total loans	3,477,821		3,186,234
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Non-accrual	22,639	14,088
Loans past due 90 days or more and still accruing	0	0
Commercial loans collateralized by assignment of lease payments
Contractual aging of the recorded investment in loans
Current	1,676,959	1,679,991
30-59 Days Past Due	4,322	2,025
60-89 Days Past Due	2,007	6,095
Loans Past Due 90 Days or More	10,252	4,147
Total Past Due	16,581	12,267
Total loans, excluding covered loans	1,693,540	1,692,258
Total loans	1,693,540		1,631,660
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Non-accrual	8,113	2,404
Loans past due 90 days or more and still accruing	3,713	3,566
Commercial real estate
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	2,580,009	2,544,867
Total loans	2,627,812		2,757,416
Healthcare
Contractual aging of the recorded investment in loans
Current	399,756	342,984
30-59 Days Past Due	1,100	0
60-89 Days Past Due	0	0
Loans Past Due 90 Days or More	0	0
Total Past Due	1,100	0
Total loans, excluding covered loans	400,856	342,984
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
Industrial
Contractual aging of the recorded investment in loans
Current	368,596	333,907
30-59 Days Past Due	0	944
60-89 Days Past Due	0	0
Loans Past Due 90 Days or More	793	3,182
Total Past Due	793	4,126
Total loans, excluding covered loans	369,389	338,033
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Non-accrual	1,216	6,371
Loans past due 90 days or more and still accruing	0	0
Multifamily
Contractual aging of the recorded investment in loans
Current	383,603	417,504
30-59 Days Past Due	874	1,377
60-89 Days Past Due	1,542	0
Loans Past Due 90 Days or More	1,371	1,517
Total Past Due	3,787	2,894
Total loans, excluding covered loans	387,390	420,398
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Non-accrual	4,029	5,333
Loans past due 90 days or more and still accruing	0	0
Retail
Contractual aging of the recorded investment in loans
Current	423,888	432,718
30-59 Days Past Due	1,379	2,481
60-89 Days Past Due	4,161	652
Loans Past Due 90 Days or More	1,774	2,325
Total Past Due	7,314	5,458
Total loans, excluding covered loans	431,202	438,176
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Non-accrual	4,510	2,986
Loans past due 90 days or more and still accruing	0	0
Office
Contractual aging of the recorded investment in loans
Current	212,627	244,166
30-59 Days Past Due	284	0
60-89 Days Past Due	0	0
Loans Past Due 90 Days or More	4,510	2,127
Total Past Due	4,794	2,127
Total loans, excluding covered loans	217,421	246,293
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Non-accrual	3,209	3,644
Loans past due 90 days or more and still accruing	0	464
Other
Contractual aging of the recorded investment in loans
Current	767,781	754,031
30-59 Days Past Due	3,294	307
60-89 Days Past Due	1,429	2,421
Loans Past Due 90 Days or More	1,247	2,224
Total Past Due	5,970	4,952
Total loans, excluding covered loans	773,751	758,983
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Non-accrual	12,383	13,541
Loans past due 90 days or more and still accruing	90	324
Residential real estate
Contractual aging of the recorded investment in loans
Current	595,412	485,492
30-59 Days Past Due	1,496	8,038
60-89 Days Past Due	1,940	2,319
Loans Past Due 90 Days or More	8,323	7,438
Total Past Due	11,759	17,795
Total loans, excluding covered loans	607,171	503,287
Total loans	650,906		520,223
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Non-accrual	17,656	17,311
Loans past due 90 days or more and still accruing	416	0
Construction real estate
Contractual aging of the recorded investment in loans
Current	255,620	246,731
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
Loans Past Due 90 Days or More	0	337
Total Past Due	0	337
Total loans, excluding covered loans	255,620	247,068
Total loans	267,992		252,450
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Non-accrual	0	337
Loans past due 90 days or more and still accruing	0	0
Indirect vehicle
Contractual aging of the recorded investment in loans
Current	342,483	265,296
30-59 Days Past Due	2,166	2,516
60-89 Days Past Due	732	702
Loans Past Due 90 Days or More	350	326
Total Past Due	3,248	3,544
Total loans, excluding covered loans	345,731	268,840
Total loans	345,731		273,038
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Non-accrual	1,563	1,542
Loans past due 90 days or more and still accruing	0	0
Home equity lines
Contractual aging of the recorded investment in loans
Current	213,828	242,756
30-59 Days Past Due	1,584	2,717
60-89 Days Past Due	1,918	1,039
Loans Past Due 90 Days or More	5,843	5,397
Total Past Due	9,345	9,153
Total loans, excluding covered loans	223,173	251,909
Total loans	235,159		263,092
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Non-accrual	16,940	15,171
Loans past due 90 days or more and still accruing	0	0
Other consumer
Contractual aging of the recorded investment in loans
Current	87,233	78,106
30-59 Days Past Due	191	16
60-89 Days Past Due	120	12
Loans Past Due 90 Days or More	68	3
Total Past Due	379	31
Total loans, excluding covered loans	87,612	78,137
Total loans	90,220		$ 91,811
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Non-accrual	44	5
Loans past due 90 days or more and still accruing	56	0
Total loans, excluding purchased credit-impaired loans
Contractual aging of the recorded investment in loans
Current	9,152,274	8,755,253
30-59 Days Past Due	23,214	28,643
60-89 Days Past Due	17,284	13,240
Loans Past Due 90 Days or More	40,716	34,436
Total Past Due	81,214	76,319
Total loans, excluding covered loans	9,233,488	8,831,572
Purchased credit-impaired loans
Contractual aging of the recorded investment in loans
Current	94,249	158,215
30-59 Days Past Due	69	4,432
60-89 Days Past Due	1,776	585
Loans Past Due 90 Days or More	59,599	88,413
Total Past Due	61,444	93,430
Total loans	155,693	251,645
Total loans
Contractual aging of the recorded investment in loans
Current	9,246,523	8,913,468
30-59 Days Past Due	23,283	33,075
60-89 Days Past Due	19,060	13,825
Loans Past Due 90 Days or More	100,315	122,849
Total Past Due	142,658	169,749
Total loans	9,389,181	9,083,217
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Non-accrual	92,302	82,733
Loans past due 90 days or more and still accruing	4,275	4,354
Non-performing loan aging
Contractual aging of the recorded investment in loans
Current	50,258	46,149
30-59 Days Past Due	3,981	5,764
60-89 Days Past Due	1,734	1,099
Loans Past Due 90 Days or More	40,604	34,075
Total Past Due	46,319	40,938
Total loans	96,577	87,087
Non-performing loan aging | Residential real estate
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	18,072	17,311
Non-performing loan aging | Indirect vehicle
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	1,563	1,543
Non-performing loan aging | Home equity lines
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	16,940	15,170
Non-performing loan aging | Other consumer
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	$ 100	$ 5

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Business Combination (Details) - USD ($)			3 Months Ended		9 Months Ended
	Aug. 18, 2014	Aug. 15, 2014	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Business Acquisition [Line Items]
Goodwill			$ 711,521,000		$ 711,521,000		$ 711,521,000
Taylor Capital Group, Inc.
Business Acquisition [Line Items]
Amount called by each right	$ 4.08
Cash paid	129,510,000
Cash paid, net, stock options and warrants	4,400,000
Goodwill	288,152,000
Pretax merger related costs			$ 319,000	$ 27,200,000	$ 9,600,000	$ 28,300,000
Taylor Capital Group, Inc. | Restricted stock
Business Acquisition [Line Items]
Cash paid	$ 3,700,000
Taylor Capital Group, Inc. | Common Stock
Business Acquisition [Line Items]
Number of securities called by each right (in shares)	0.64318
Number of shares issued	19,600,000	19,602,482
Series A Preferred Stock | Taylor Capital Group, Inc.
Business Acquisition [Line Items]
Number of securities called by each right (in shares)	1

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 40,278	$ 6,901	$ 115,341	$ 49,976
Unrealized holding gains on investment securities, net of reclassification adjustments	4,989	5,589	3,507	16,089
Reclassification adjustment for amortization of unrealized gains on investment securities transferred to held to maturity from available for sale	(1,010)	106	(2,669)	(2,509)
Reclassification adjustments for (gains) losses included in net income	(371)	3,246	173	3,016
Other comprehensive income, before tax	3,608	8,941	1,011	16,596
Income tax benefit related to items of other comprehensive income	(1,418)	(3,544)	(399)	(6,548)
Other comprehensive income, net of tax	2,190	5,397	612	10,048
Comprehensive income	$ 42,468	$ 12,298	$ 115,953	$ 60,024

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New Authoritative Accounting Guidance

9 Months Ended

Sep. 30, 2015

Accounting Changes and Error Corrections [Abstract]

New Authoritative Accounting Guidance

New Authoritative Accounting Guidance

ASC Topic 310 “Receivables.” New authoritative accounting guidance under ASC Topic 310, “Receivables” amended prior guidance to clarify that an in substance repossession or foreclosure occurs, and a creditor is considered to have received physical

possession of residential real estate property collateralizing a consumer mortgage loan, upon either (1) the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure or (2) the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. Additionally, the amendments require interim and annual disclosures. The Company adopted this new authoritative guidance on January 1, 2015, and it did not have an impact on the Company's statements of operations or financial condition.

New authoritative accounting guidance under ASC Topic 310, “Receivables” amended prior guidance to require an entity to derecognize a mortgage loan and recognize a separate other receivable upon foreclosure if (i) the loan has a government guarantee that is not separable from the loan before foreclosure, (ii) at the time of foreclosure, the creditor has the intent to convey the real estate property to the guarantor and make a claim on that guarantee, and the creditor has the ability to recover under that claim, and (iii) at the time of foreclosure, any amount of the claim that is determined on the basis of the fair value of the real estate is fixed. The separate other receivable is to be measured based on the amount of the loan balance (principal and interest) expected to be recovered from the guarantor. The Company adopted this new authoritative guidance on January 1, 2015, and it did not have a material impact on the Company's statements of operations or financial condition.

ASC Topic 323 “Investments - Equity Method and Joint Ventures.” New authoritative accounting guidance under ASC Topic 323, “Investments - Equity Method and Joint Ventures” amended prior guidance to permit entities to make an accounting policy election to account for their investments in qualified affordable housing projects using the proportional amortization method if certain conditions are met. Under the proportional amortization method, an entity amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits received and recognizes the net investment performance in the statement of operation as a component of income tax expense. The Company adopted this new authoritative guidance on January 1, 2015, and it did not have an impact on the Company's statements of operations or financial condition.

ASC Topics 205 “Presentation of Financial Statements” and 360 “Property, Plant, and Equipment.” New authoritative accounting guidance under ASC Topic 205, “Presentation of Financial Statements” and ASC Topic 360 “Property, Plant, and Equipment” amended prior guidance to change the requirements for reporting discontinued operations. The disposal of a component of an entity or group of components of an entity is required to be reported in discontinued operations if the disposal represents a strategic shift that has (or will have) a major effect on an entity's operations and financial results. The new authoritative guidance also requires additional disclosures about discontinued operations. The Company adopted this new authoritative guidance on January 1, 2015, and it did not have an impact on the Company's statements of operations or financial condition.

ASC Topic 860 “Transfers and Servicing.” New authoritative accounting guidance under ASC Topic 860, “Transfers and Servicing” amended prior guidance to change the accounting for repurchase-to-maturity transactions to secured borrowing accounting and to require separate accounting for a transfer of a financial asset executed contemporaneously with a repurchase agreement with the same counterparty, which will result in secured borrowing accounting for the repurchase agreement. The new authoritative guidance also requires disclosures for a transfer of a financial asset accounted for as a sale and an agreement with the same transferee entered into in contemplation of the initial transfer that results in the transferor retaining substantially all of the exposure to the economic return on the transferred financial asset throughout the term of the transaction. In addition, it requires disclosures related to collateral, remaining contractual tenor and of the potential risks associated with repurchase agreements, securities lending transactions and repurchase-to-maturity transactions. The Company adopted this new authoritative guidance on January 1, 2015, and it did not have an impact on the Company's statements of operations or financial condition. The additional disclosures are included in Note 9. Short-Term Borrowings and Note 10. Long-Term Borrowings.

ASC Topic 718 “Compensation - Stock Compensation.” New authoritative accounting guidance under ASC Topic 718, “Compensation - Stock Compensation” amended prior guidance to require that a performance target that affects vesting and that could be achieved after the requisite service period be treated as a performance condition. The Company adopted this new authoritative guidance on January 1, 2015, 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. 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 225 “Income Statement - Extraordinary and Unusual Items.” New authoritative accounting guidance under ASC Topic 225, “Income Statement - Extraordinary and Unusual Items” amended prior guidance to eliminate the concept of extraordinary items. The new authoritative guidance will be effective for reporting periods after January 1, 2016 and is not expected to have a significant impact on the Company's statements of operations or financial condition.

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 new authoritative guidance will be effective for reporting periods after January 1, 2016 and is not expected to have a significant 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 new authoritative guidance will be effective for reporting periods after January 1, 2016 and is not expected to have a significant 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 income statement 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 acquisition date. The new authoritative guidance will be effective for reporting periods after January 1, 2016 and is not expected to have a significant impact on the Company's statements of operations or financial condition.

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Loans (Details 11) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Purchased credit-impaired loans and non-credit-impaired loans
Non covered loans	$ 1,994,667
Total acquired	2,013,626
Outstanding balances on purchased loans from the FDIC	60,000	$ 95,100
Carrying amount on loans purchased from the FDIC	62,200	$ 91,400
Purchased Credit-Impaired Loans
Purchased credit-impaired loans and non-credit-impaired loans
Non covered loans	136,734
Total acquired	155,693
Purchased Non-Credit-Impaired Loans
Purchased credit-impaired loans and non-credit-impaired loans
Non covered loans	1,857,933
Total acquired	1,857,933
Commercial loans
Purchased credit-impaired loans and non-credit-impaired loans
Non covered loans	833,638
Commercial loans | Purchased Credit-Impaired Loans
Purchased credit-impaired loans and non-credit-impaired loans
Non covered loans	37,189
Commercial loans | Purchased Non-Credit-Impaired Loans
Purchased credit-impaired loans and non-credit-impaired loans
Non covered loans	796,449
Commercial loans collateralized by assignment of lease payments
Purchased credit-impaired loans and non-credit-impaired loans
Non covered loans	100,708
Commercial loans collateralized by assignment of lease payments | Purchased Credit-Impaired Loans
Purchased credit-impaired loans and non-credit-impaired loans
Non covered loans	0
Commercial loans collateralized by assignment of lease payments | Purchased Non-Credit-Impaired Loans
Purchased credit-impaired loans and non-credit-impaired loans
Non covered loans	100,708
Commercial real estate
Purchased credit-impaired loans and non-credit-impaired loans
Non covered loans	762,829
Commercial real estate | Purchased Credit-Impaired Loans
Purchased credit-impaired loans and non-credit-impaired loans
Non covered loans	47,803
Commercial real estate | Purchased Non-Credit-Impaired Loans
Purchased credit-impaired loans and non-credit-impaired loans
Non covered loans	715,026
Construction real estate
Purchased credit-impaired loans and non-credit-impaired loans
Non covered loans	65,912
Construction real estate | Purchased Credit-Impaired Loans
Purchased credit-impaired loans and non-credit-impaired loans
Non covered loans	12,372
Construction real estate | Purchased Non-Credit-Impaired Loans
Purchased credit-impaired loans and non-credit-impaired loans
Non covered loans	53,540
Consumer related
Purchased credit-impaired loans and non-credit-impaired loans
Covered loans	18,959
Non covered loans	231,580
Consumer related | Purchased Credit-Impaired Loans
Purchased credit-impaired loans and non-credit-impaired loans
Covered loans	18,959
Non covered loans	39,370
Consumer related | Purchased Non-Credit-Impaired Loans
Purchased credit-impaired loans and non-credit-impaired loans
Covered loans	0
Non covered loans	192,210
Heritage | Commercial loans, commercial real estate receivable and construction loans
Purchased credit-impaired loans and non-credit-impaired loans
Loans not covered under the loss share agreement	2,300
Benchmark | Commercial loans, commercial real estate receivable and construction loans
Purchased credit-impaired loans and non-credit-impaired loans
Loans not covered under the loss share agreement	1,500
Broadway and New Century | Commercial loans, commercial real estate receivable and construction loans
Purchased credit-impaired loans and non-credit-impaired loans
Loans not covered under the loss share agreement	$ 21,100

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Fair Value Measurements (Details) - USD ($) $ in Thousands		Sep. 30, 2015	Dec. 31, 2014
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		$ 1,551,238	$ 1,654,752
Loans held for sale		676,020	737,209
Loans		9,233,488	8,831,572
Mortgage servicing rights		148,097	235,402
Derivative financial instruments		20,191	13,952
Derivative financial instruments		51,562	37,927
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		65,461	65,873
States and political subdivisions
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		399,274	410,854
Residential mortgage-backed securities
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		693,225	720,563
Commercial mortgage-backed securities
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		154,201	187,662
Corporate bonds
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		228,251	259,203
Equity securities
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		10,826	10,597
Recurring basis
Financial assets and financial liabilities measured at fair value on a recurring basis
Loans held for sale		676,020	737,209
Loans		27,176
Assets held in trust for deferred compensation		16,022	16,829
Other liabilities	[1]	15,513	16,483
Derivative financial instruments		53,618	40,499
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		65,461	65,873
Recurring basis | States and political subdivisions
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		399,274	410,854
Recurring basis | Residential mortgage-backed securities
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		693,225	720,563
Recurring basis | Commercial mortgage-backed securities
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		154,201	187,662
Recurring basis | Corporate bonds
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		228,251	259,203
Recurring basis | Equity securities
Financial assets and financial liabilities measured at fair value on a recurring basis
Investment securities available for sale		10,826	10,597
Recurring basis | Mortgage servicing rights
Financial assets and financial liabilities measured at fair value on a recurring basis
Mortgage servicing rights		148,097	235,402
Recurring basis | Derivative financial instruments
Financial assets and financial liabilities measured at fair value on a recurring basis
Derivative financial instruments		66,410	46,388
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		10,826	10,597
Loans held for sale		0	0
Assets held in trust for deferred compensation		16,022	16,829
Derivative financial instruments		11,955	1,607
Other liabilities	[1]	15,513	16,483
Derivative financial instruments		15,029	7,209
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		10,826	10,597
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		11,955	1,607
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		1,539,554	1,643,182
Loans held for sale		676,020	737,209
Loans		27,176
Derivative financial instruments		46,293	39,707
Derivative financial instruments		38,589	33,290
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		65,461	65,873
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		398,811	410,391
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		692,830	720,053
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		154,201	187,662
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		228,251	259,203
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		46,293	39,707
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		858	973
Loans held for sale		0	0
Derivative financial instruments		8,162	5,074
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		463	463
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		395	510
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		148,097	235,402
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		$ 8,162	$ 5,074

[1] Liabilities associated with assets held in trust for deferred compensation

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Earnings Per Common Share (Tables)

9 Months Ended

Sep. 30, 2015

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,
	2015		2014			2015		2014
Distributed earnings allocated to common stock	$	12,733	$	10,545		$	36,227	$	23,877
Undistributed earnings	27,545		(3,644		)	79,114		26,099
Net income	40,278		6,901			115,341		49,976
Less: preferred stock dividends	2,000		2,000			6,000		2,000
Net income available to common stockholders	38,278		4,901			109,341		47,976
Less: earnings allocated to participating securities	2		—			5		1
Earnings allocated to common stockholders	$	38,276	$	4,901		$	109,336	$	47,975
Weighted average shares outstanding for basic earnings per common share	74,297,281		63,972,902			74,478,164		57,795,094
Dilutive effect of equity awards	732,546		485,076			676,421		546,833
Weighted average shares outstanding for diluted earnings per common share	75,029,827		64,457,978			75,154,585		58,341,927
Basic earnings per common share	$	0.52	$	0.08		$	1.47	$	0.83
Diluted earnings per common share	0.51		0.08			1.45		0.82

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Fair Value Measurements (Details 6) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
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	$ 234,220	$ 256,804
Interest earning deposits with banks	66,025	55,277
Investment securities available for sale	1,551,238	1,654,752
Investment securities held to maturity	1,263,212	1,035,061
Non-marketable securities - FHLB and FRB stock	91,400	75,569
Loans held for sale	676,020	737,209
Derivative financial instruments	20,191	13,952
Financial Liabilities:
Noninterest bearing deposits	4,434,067	4,118,256
Interest bearing deposits	6,820,511	6,872,686
Short-term borrowings	940,529	931,415
Junior subordinated notes issued to capital trusts	186,068	185,778
Derivative financial instruments	51,562	37,927
Carrying Amount
Financial Assets:
Cash and due from banks	234,220	256,804
Interest earning deposits with banks	66,025	55,277
Federal funds sold	0
Investment securities available for sale	1,551,238	1,654,752
Investment securities held to maturity	1,224,852	993,380
Non-marketable securities - FHLB and FRB stock	91,400	75,569
Loans held for sale	676,020	737,209
Loans, net	9,264,555	8,973,191
Accrued interest receivable	51,195	49,065
Derivative financial instruments	66,410	46,388
Financial Liabilities:
Noninterest bearing deposits	4,434,067	4,118,256
Interest bearing deposits	6,820,511	6,872,686
Short-term borrowings	940,529	931,415
Long-term borrowings	95,175	82,916
Junior subordinated notes issued to capital trusts	186,068	185,778
Accrued interest payable	2,923	3,709
Derivative financial instruments	53,618	40,499
Estimated Fair Value
Financial Assets:
Cash and due from banks	234,220	256,804
Interest earning deposits with banks	66,025	55,277
Federal funds sold	0
Investment securities available for sale	1,551,238	1,654,752
Investment securities held to maturity	1,263,212	1,035,061
Non-marketable securities - FHLB and FRB stock	91,400	75,569
Loans held for sale	676,020	737,209
Loans, net	9,285,678	8,956,494
Accrued interest receivable	51,195	49,065
Derivative financial instruments	66,410	46,388
Financial Liabilities:
Noninterest bearing deposits	4,434,067	4,118,256
Interest bearing deposits	6,825,784	6,877,349
Short-term borrowings	940,532	931,415
Long-term borrowings	97,252	86,025
Junior subordinated notes issued to capital trusts	115,618	122,408
Accrued interest payable	2,923	3,709
Derivative financial instruments	53,618	40,499
Recurring basis
Financial Assets:
Loans held for sale	676,020	737,209
Financial Liabilities:
Derivative financial instruments	53,618	40,499
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial Assets:
Cash and due from banks	234,220	256,804
Interest earning deposits with banks	66,025	55,277
Federal funds sold	0
Investment securities available for sale	10,826	10,597
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	51,195	49,065
Derivative financial instruments	11,955	1,607
Financial Liabilities:
Noninterest bearing deposits	4,434,067	4,118,256
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	2,923	3,709
Derivative financial instruments	15,029	7,209
Recurring basis | Significant Other Observable Inputs (Level 2)
Financial Assets:
Cash and due from banks	0	0
Interest earning deposits with banks	0	0
Federal funds sold	0
Investment securities available for sale	1,539,554	1,643,182
Investment securities held to maturity	1,263,212	1,035,061
Non-marketable securities - FHLB and FRB stock	0	0
Loans held for sale	676,020	737,209
Loans, net	27,176	0
Accrued interest receivable	0	0
Derivative financial instruments	46,293	39,707
Financial Liabilities:
Noninterest 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	38,589	33,290
Recurring basis | Significant Unobservable Inputs (Level 3)
Financial Assets:
Cash and due from banks	0	0
Interest earning deposits with banks	0	0
Federal funds sold	0
Investment securities available for sale	858	973
Investment securities held to maturity	0	0
Non-marketable securities - FHLB and FRB stock	91,400	75,569
Loans held for sale	0	0
Loans, net	9,258,502	8,956,494
Accrued interest receivable	0	0
Derivative financial instruments	8,162	5,074
Financial Liabilities:
Noninterest bearing deposits	0	0
Interest bearing deposits	6,825,784	6,877,349
Short-term borrowings	940,532	931,415
Long-term borrowings	97,252	86,025
Junior subordinated notes issued to capital trusts	115,618	122,408
Accrued interest payable	0	0
Derivative financial instruments	$ 0	$ 0

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Derivative Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2015

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, 2015 and December 31, 2014 (in thousands):

	Asset Derivatives								Liability Derivatives
	September 30, 2015				December 31, 2014				September 30, 2015					December 31, 2014
	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)	$	—	$	—	$	—	$	—	$	165	$	(11	)	$	197	$	(15	)
Stand-alone derivative instruments: (2)
Interest rate swap contracts	2,214,393		53,421		1,509,930		37,039		1,276,393		(40,498		)	2,001,787		(30,761		)
Interest rate options contracts	138,049		186		55,830		283		138,049		(186		)	55,830		(283		)
Foreign exchange contracts	64,368		4,094		27,402		2,276		64,686		(3,857		)	27,002		(2,109		)
Spot foreign exchange contracts	1,096		12		512		5		684		(3		)	304		(18		)
Mortgage related derivatives	865,162		8,697		871,446		6,785		975,000		(9,063		)	879,841		(7,313		)
Total stand-alone derivative instruments	3,283,068		66,410		2,465,120		46,388		2,454,812		(53,607		)	2,964,764		(40,484		)
Total	$	3,283,068	$	66,410	$	2,465,120	$	46,388	$	2,454,977	$	(53,618	)	$	2,964,961	$	(40,499	)

⁽¹⁾ Hedged fixed-rate commercial real estate loans

⁽²⁾ These stand-alone derivative instruments are not designated as hedging instruments under ASC Topic 815.

Schedule of the Amount of Gains and Losses on Derivative Contracts Designated as Hedges and Not Designated as Hedges

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,
	2015			2014			2015			2014
Derivative instruments designated as hedges of fair value:
Interest rate swap contracts	$	2		$	(1,869	)	$	4		$	(1,871	)
Stand-alone derivative instruments:
Interest rate swap contracts	22,862			(312		)	8,623			(294		)
Interest rate options contracts	541			—			—			—
Foreign exchange contracts	(95		)	4			91			61
Spot foreign exchange contracts	(4		)	(17		)	22			(9		)
Mortgage related derivatives	(13,183		)	1,514			(9,408		)	1,554
Total stand-alone derivative instruments	10,121			1,189			(672		)	1,312
Total	$	10,123		$	(680	)	$	(668	)	$	(559	)

Schedule of Derivative Instruments

Information about the Company's financial instruments that are eligible for offset in the consolidated balance sheet as of September 30, 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	$	16,606	$	—	$	16,606	$	40,509	$	—	$	40,509
Foreign exchange contracts	3,031		—		3,031		1,971		—		1,971
Mortgage related derivatives	554		—		554		9,082		—		9,082
Total derivatives	20,191		—		20,191		51,562		—		51,562
Repurchase agreements	—		—		—		262,009		—		262,009
Total	$	20,191	$	—	$	20,191	$	313,571	$	—	$	313,571

	Financial Assets										Financial Liabilities
	Net Amount Recognized		Financial Instruments			Collateral			Net Amount		Net Amount Recognized		Financial Instruments			Collateral			Net Amount
Derivatives:
Counterparty A	$	11,420	$	(5,966	)	$	(5,454	)	$	—	$	5,966	$	(5,966	)	$	—		$	—
Counterparty B	15		(15		)	—			—		9,803		(15		)	(9,788		)	—
Counterparty C	5,948		(5,948		)	—			—		15,275		(5,948		)	(9,327		)	—
Other counterparties	2,808		(2,808		)	—			—		20,518		(2,808		)	(16,808		)	902
Total derivatives	20,191		(14,737		)	(5,454		)	—		51,562		(14,737		)	(35,923		)	902
Repurchase agreements	—		—			—			—		262,009		—			(262,009		)	—
Total	$	20,191	$	(14,737	)	$	(5,454	)	$	—	$	313,571	$	(14,737	)	$	(297,932	)	$	902

Information about the Company's financial instruments that are eligible for offset in the consolidated balance sheet as of December 31, 2014 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	$	10,727	$	—	$	10,727	$	29,916	$	—	$	29,916
Foreign exchange contracts	1,525		—		1,525		709		—		709
Mortgage related derivatives	1,700		—		1,700		7,302		—		7,302
Total derivatives	13,952		—		13,952		37,927		—		37,927
Repurchase agreements	—		—		—		219,824		—		219,824
Total	$	13,952	$	—	$	13,952	$	257,751	$	—	$	257,751

	Financial Assets									Financial Liabilities
	Net Amount Recognized		Financial Instruments			Collateral		Net Amount		Net Amount Recognized		Financial Instruments			Collateral			Net Amount
Derivatives:
Counterparty A	$	13	$	(13	)	$	—	$	—	$	9,556	$	(13	)	$	(9,543	)	$	—
Counterparty B	145		(145		)	—		—		3,736		(145		)	(3,591		)	—
Counterparty C	6,123		(6,123		)	—		—		10,335		(6,122		)	(4,213		)	—
Other counterparties	7,671		(3,920		)	—		3,751		14,300		(3,920		)	(8,663		)	1,717
Total derivatives	13,952		(10,201		)	—		3,751		37,927		(10,200		)	(26,010		)	1,717
Repurchase agreements	—		—			—		—		219,824		—			(219,824		)	—
Total	$	13,952	$	(10,201	)	$	—	$	3,751	$	257,751	$	(10,200	)	$	(245,834	)	$	1,717

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2015

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, 2015 and December 31, 2014, the following financial instruments were outstanding, the contractual amounts of which represent off-balance sheet credit risk (in thousands):

	Contractual Amount
	September 30, 2015		December 31, 2014
Commitments to extend credit:
Home equity lines	$	194,644	$	221,102
Other commitments	3,028,042		2,643,220
Letters of credit:
Standby	132,277		131,810
Commercial	1,747		2,401

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, 2015, 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, 2015, 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, decreased$187 thousand to $134.0 million from $134.2 million at December 31, 2014.  Of the $134.0 million in commitments outstanding at September 30, 2015, approximately $83.8 million of the letters of credit have been issued or renewed since December 31, 2014.

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, 2015, the Company had approximately $4.1 million in capital expenditure commitments outstanding which relate to various projects to renovate existing 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, 2015, approximately 22% 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, 2015. The distribution of commitments to extend credit approximates the distribution of loans outstanding.  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.

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.