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, 2013

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 0-24566-01

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. (Check one):

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 Act).  YesoNox

There were issued and outstanding 54,961,540 shares of the Registrant’s common stock as of October 30, 2013.

1

MB FINANCIAL, INC. AND SUBSIDIARIES

FORM 10-Q

September 30, 2013

INDEX

		Page
PART I.	FINANCIAL INFORMATION
Item 1.	Financial Statements	3
	Consolidated Balance Sheets at September 30, 2013 (Unaudited) and December 31, 2012	3
	Consolidated Statements of Operations for the Three and Nine Months Ended September 30, 2013 and 2012 (Unaudited)	4
	Consolidated Statements of Comprehensive Income for the Three and Nine Months Ended September 30, 2013 and 2012 (Unaudited)	6
	Consolidated Statements of Changes in Stockholders’ Equity for the Nine Months Ended September 30, 2013 and 2012 (Unaudited)	7
	Consolidated Statements of Cash Flows for the Nine Months Ended September 30, 2013 and 2012 (Unaudited)	8
	Notes to Consolidated Financial Statements (Unaudited)	10
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	49
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	69
Item 4.	Controls and Procedures	72
PART II.	OTHER INFORMATION
Item 1.	Legal Proceedings	73
Item 1A.	Risk Factors	73
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	74
Item 6.	Exhibits	74
	Signatures	75

2

PART I.        FINANCIAL INFORMATION

Item 1.   Financial Statements

MB FINANCIAL, INC. & SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

(Amounts in thousands, except common share data)

	(Unaudited)
	September 30, 2013			December 31, 2012
ASSETS
Cash and due from banks	$	215,017		$	176,010
Interest earning deposits with banks	41,700			111,533
Total cash and cash equivalents	256,717			287,543
Federal funds sold	47,500			—
Investment securities:
Securities available for sale, at fair value	1,090,123			1,868,171
Securities held to maturity, at amortized cost ($1,212,748 and $535,681 fair value at September 30, 2013 and December 31, 2012, respectively)	1,193,544			493,421
Non-marketable securities - FHLB and FRB stock	50,870			55,385
Total investment securities	2,334,537			2,416,977
Loans held for sale	1,120			7,492
Loans:
Total loans, excluding covered loans	5,313,235			5,317,080
Covered loans	273,497			449,850
Total loans	5,586,732			5,766,930
Less: Allowance for loan losses	118,031			124,204
Net loans	5,468,701			5,642,726
Lease investment, net	112,491			129,823
Premises and equipment, net	220,574			221,533
Cash surrender value of life insurance	129,332			128,879
Goodwill	423,369			423,369
Other intangibles	24,917			29,512
Other real estate owned, net	31,356			36,977
Other real estate owned related to FDIC-assisted transactions	24,792			22,478
FDIC indemnification asset	11,074			39,345
Other assets	171,138			185,151
Total assets	$	9,257,618		$	9,571,805
LIABILITIES AND STOCKHOLDERS’ EQUITY
LIABILITIES
Deposits:
Noninterest bearing	$	2,269,367		$	2,164,547
Interest bearing	5,029,319			5,378,150
Total deposits	7,298,686			7,542,697
Short-term borrowings	240,600			220,602
Long-term borrowings	62,428			116,050
Junior subordinated notes issued to capital trusts	152,065			152,065
Accrued expenses and other liabilities	194,371			264,621
Total liabilities	7,948,150			8,296,035
STOCKHOLDERS’ EQUITY
Common stock, ($0.01 par value; authorized 70,000,000 shares at September 30, 2013 and December 31, 2012; issued 55,141,834 shares at September 30, 2013 and 54,955,284 shares at December 31, 2012)	551			550
Additional paid-in capital	736,294			732,771
Retained earnings	564,779			507,933
Accumulated other comprehensive income	9,918			36,326
Less: 180,296 and 170,567 shares of treasury stock, at cost, at September 30, 2013 and December 31, 2012, respectively	(3,525		)	(3,293		)
Controlling interest stockholders’ equity	1,308,017			1,274,287
Noncontrolling interest	1,451			1,483
Total stockholders’ equity	1,309,468			1,275,770
Total liabilities and stockholders’ equity	$	9,257,618		$	9,571,805

     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,
	2013			2012			2013			2012
Interest income:
Loans	$	60,115		$	67,482		$	180,489		$	208,380
Investment securities:
Taxable	6,330			7,287			18,749			27,053
Nontaxable	8,175			7,582			24,399			21,624
Federal funds sold	7			—			9			—
Other interest earning accounts	193			312			420			639
Total interest income	74,820			82,663			224,066			257,696
Interest expense:
Deposits	4,433			7,374			15,274			24,192
Short-term borrowings	112			342			395			910
Long-term borrowings and junior subordinated notes	1,367			2,872			4,324			9,322
Total interest expense	5,912			10,588			19,993			34,424
Net interest income	68,908			72,075			204,073			223,272
Provision for credit losses	(3,304		)	(13,000		)	(2,804		)	(9,900		)
Net interest income after provision for credit losses	72,212			85,075			206,877			233,172
Non-interest income:
Capital markets and international banking fees	972			1,400			2,719			2,700
Commercial deposit and treasury management fees	6,327			5,860			18,322			17,541
Lease financing, net	14,070			9,671			45,435			23,963
Trust and asset management fees	4,799			4,428			14,167			13,367
Card fees	2,745			2,388			8,175			6,863
Loan service fees	1,427			1,075			4,349			3,409
Consumer and other deposit service fees	3,648			3,786			10,487			10,773
Brokerage fees	1,289			1,185			3,680			3,704
Net gain on investment securities	1			281			14			244
Increase in cash surrender value of life insurance	851			890			2,537			2,677
Net loss on sale of assets	—			(12		)	—			(37		)
Accretion of FDIC indemnification asset	64			204			307			901
Net (loss) gain recognized on other real estate owned	(791		)	(3,938		)	894			(15,968		)
Net gain on sale of loans	177			575			1,322			1,503
Other operating income	1,337			760			3,835			3,674
Total non-interest income	36,916			28,553			116,243			75,314
Non-interest expenses:
Salaries and employee benefits	44,918			42,083			132,341			122,658
Occupancy and equipment expense	8,797			8,274			27,609			27,032
Computer services and telecommunication expense	4,870			3,777			13,374			11,339
Advertising and marketing expense	1,917			1,936			6,187			5,848
Professional and legal expense	3,102			1,554			5,750			4,470
Other intangibles amortization expense	1,513			1,251			4,595			3,759
Branch impairment charges	—			758			—			758
Other real estate expense, net	240			874			572			2,541
Prepayment fees on interest bearing liabilities	—			12,682			—			12,682
Other operating expenses	10,117			7,976			28,413			24,243
Total non-interest expenses	75,474			81,165			218,841			215,330
Income before income taxes	33,654			32,463			104,279			93,156
Income tax expense	9,254			9,330			29,680			26,794
Net income	$	24,400		$	23,133		$	74,599		$	66,362
Dividends and discount accretion on preferred shares	—			—			—			3,269
Net income available to common stockholders	$	24,400		$	23,133		$	74,599		$	63,093

     See Accompanying Notes to Consolidated Financial Statements.

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,
	2013		2012		2013		2012
Common share data:
Basic earnings per common share	$	0.45	$	0.43	$	1.37	$	1.16
Diluted earnings per common share	0.44		0.42		1.36		1.16
Weighted average common shares outstanding for basic earnings per common share	54,565,089		54,346,827		54,471,541		54,226,241
Diluted weighted average common shares outstanding for diluted earnings per common share	55,130,653		54,556,517		54,912,352		54,472,617

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,
	2013			2012			2013			2012
Net income	$	24,400		$	23,133		$	74,599		$	66,362
Unrealized holding (losses) gains on investment securities, net of tax and reclassification adjustments	(3,701		)	2,118			(25,788		)	1,981
Reclassification adjustment for amortization of unrealized gains on investment securities transferred to held to maturity from available for sale, net of tax	(612		)	—			(612		)	—
Reclassification adjustments for gains included in net income, net of tax	—			(168		)	(8		)	(146		)
Other comprehensive (loss) income, net of tax	(4,313		)	1,950			(26,408		)	1,835
Comprehensive income	$	20,087		$	25,083		$	48,191		$	68,197

See Accompanying Notes to Consolidated Financial Statements.

6

MB FINANCIAL, INC. & SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY

Nine Months EndedSeptember 30, 2013 and 2012

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

	Preferred Stock			Common Stock		Additional Paid-in Capital			Retained Earnings			Accumulated Other Comprehensive Income (Loss), Net of Tax			Treasury Stock			Noncontrolling Interest			Total Stock- holders’ Equity
Balance at December 31, 2011	$	194,719		$	548	$	731,248		$	427,956		$	39,150		$	(3,044	)	$	2,450		$	1,393,027
Net income	—			—		—			66,362			—			—			184			66,546
Other comprehensive income, net of tax	—			—		—			—			1,835			—			—			1,835
Cash dividends declared on common shares ($0.03 per share)	—			—		—			(1,643		)	—			—			—			(1,643		)
Dividends and discount accretion on preferred shares	1,281			—		—			(3,269		)	—			—			—			(1,988		)
Repurchase of preferred shares	(196,000		)	—		(1,518		)	—			—			—			—			(197,518		)
Restricted common stock activity, net of tax	—			2		(722		)	17			—			1,774			—			1,071
Stock option activity, net of tax	—			—		(625		)	3			—			345			—			(277		)
Repurchase of common shares in connection with
employee benefit plans and held in trust for
deferred compensation plan	—			—		451			—			—			(2,379		)	—			(1,928		)
Stock-based compensation expense	—			—		3,581			—			—			—			—			3,581
Additional investment in subsidiary	—			—		(736		)	—			—			—			(904		)	(1,640		)
Distributions to noncontrolling interest	—			—		—			—			—			—			(236		)	(236		)
Balance at September 30, 2012	$	—		$	550	$	731,679		$	489,426		$	40,985		$	(3,304	)	$	1,494		$	1,260,830
Balance at December 31, 2012	$	—		$	550	$	732,771		$	507,933		$	36,326		$	(3,293	)	$	1,483		$	1,275,770
Net income	—			—		—			74,599			—			—			137			74,736
Other comprehensive loss, net of tax	—			—		—			—			(26,408		)	—			—			(26,408		)
Cash dividends declared on common shares ($0.32 per share)	—			—		—			(17,653		)	—			—			—			(17,653		)
Restricted common stock activity, net of tax	—			1		(757		)	(100		)	—			1,725			—			869
Stock option activity, net of tax	—			—		117			—			—			499			—			616
Repurchase of common shares in connection with
employee benefit plans and held in trust for
deferred compensation plan	—			—		303			—			—			(2,456		)	—			(2,153		)
Stock-based compensation expense	—			—		3,860			—			—			—			—			3,860
Distributions to noncontrolling interest	—			—		—			—			—			—			(169		)	(169		)
Balance at September 30, 2013	$	—		$	551	$	736,294		$	564,779		$	9,918		$	(3,525	)	$	1,451		$	1,309,468

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,
	2013			2012
Cash Flows From Operating Activities
Net income	$	74,599		$	66,362
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of premises and equipment	13,165			11,450
Depreciation of leased equipment	24,933			28,107
Impairment charges on branch facilities	—			758
Compensation expense for restricted stock awards	3,013			2,586
Compensation expense for stock option grants	847			995
Gain on sales of premises and equipment and leased equipment	(192		)	(2,746		)
Amortization of other intangibles	4,595			3,759
Provision for credit losses	(2,804		)	(9,900		)
Deferred income tax expense	13,067			19,763
Amortization of premiums and discounts on investment securities, net	35,364			31,838
Accretion of premiums and discounts on loans, net	(5,462		)	(13,000		)
Accretion of FDIC indemnification asset	(307		)	(901		)
Net gain on sale of investment securities available for sale	(14		)	(244		)
Proceeds from sale of loans held for sale	74,395			64,124
Origination of loans held for sale	(66,667		)	(64,980		)
Net gain on sale of loans held for sale	(1,322		)	(1,503		)
Net gain on sales of other real estate owned	(977		)	(1,264		)
Fair value adjustments on other real estate owned	(80		)	13,919
Net loss on sales of other real estate owned related to FDIC-assisted transactions	163			3,313
Increase in cash surrender value of life insurance	(2,537		)	(2,677		)
Decrease (increase) in other assets, net	30,976			(45,242		)
(Decrease) increase in other liabilities, net	(68,428		)	7,944
Net cash provided by operating activities	126,327			112,461
Cash Flows From Investing Activities
Increase in federal funds sold	(47,500		)	—
Proceeds from sales of investment securities available for sale	989			12,573
Proceeds from maturities and calls of investment securities available for sale	415,780			432,162
Purchases of investment securities available for sale	(364,550		)	(350,669		)
Proceeds from maturities and calls of investment securities held to maturity	5,079			960
Purchases of investment securities held to maturity	(55,409		)	(1,923		)
Purchases of non-marketable securities - FHLB and FRB stock	—			(24		)
Redemption of non-marketable securities - FHLB and FRB stock	4,515			23,203
Net decrease in loans	170,586			329,773
Purchases of premises and equipment	(11,342		)	(16,952		)
Purchases of leased equipment	(18,359		)	(19,836		)
Proceeds from sales of premises and equipment	—			1,498
Proceeds from sales of leased equipment	6,672			11,108
Capital improvements on other real estate owned	(53		)	(2,304		)
Proceeds from sale of other real estate owned	12,791			28,398
Proceeds from sale of other real estate owned related to FDIC-assisted transactions	7,535			29,008
Principal paid on lease investments	(1,127		)	(1,878		)
Life insurance death benefit	2,083			—
Net proceeds from FDIC related covered assets	11,347			79,247
Net cash provided by investing activities	139,037			554,344
Cash Flows From Financing Activities
Net decrease in deposits	(244,011		)	(168,260		)
Net increase in short-term borrowings	19,998			69,659
Proceeds from long-term borrowings	5,457			5,740
Principal paid on long-term borrowings	(59,079		)	(153,206		)
Redemption of junior subordinated notes issued to capital trusts	—			(6,186		)
Repurchase of preferred stock	—			(197,518		)
Treasury stock transactions, net	(1,653		)	(260		)
Stock options exercised	1,014			154
Excess tax benefits from share-based payment arrangements	(402		)	—
Dividends paid on preferred stock	—			(3,239		)
Dividends paid on common stock	(17,514		)	(1,627		)
Net cash used in financing activities	(296,190		)	(454,743		)
Net (decrease) increase in cash and cash equivalents	$	(30,826	)	$	212,062
Cash and cash equivalents:
Beginning of period	287,543			244,565
End of period	$	256,717		$	456,627

8

MB FINANCIAL, INC. & SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS - (Continued)

(Amounts in Thousands) (Unaudited)

	Nine Months Ended
	September 30,
	2013		2012
Supplemental Disclosures of Cash Flow Information:
Cash payments for:
Interest paid to depositors and other borrowed funds	$	20,913	$	36,156
Net income tax payments, net	35,141		4,230
Supplemental Schedule of Noncash Investing Activities:
Investment securities available for sale purchased not settled	$	1,797	$	3,919
Transfer of investment securities available for sale to investment securities held to maturity	656,617		—
Loans transferred to other real estate owned	6,060		2,724
Loans transferred to other real estate owned related to FDIC-assisted transactions	11,580		17,923
Loans transferred to repossessed vehicles	606		607
Operating leases rewritten as direct finance leases included as loans	6,541		7,593

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 ended September 30, 2013 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 December 31, 2012 audited financial statements filed on Form 10-K.

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 805 “Business Combinations.” New authoritative accounting guidance under ASC Topic 805, “Business Combinations” amended prior guidance on the subsequent accounting for an indemnification asset recognized at the acquisition date as a result of a government-assisted (Federal Deposit Insurance Corporation) acquisition of a financial institution that includes a loss-sharing agreement. The new authoritative guidance requires that at each subsequent reporting date, an acquirer measure an indemnification asset on the same basis as the indemnified liability or asset, subject to any contractual limitations on its amount, and, for an indemnification asset that is not subsequently measured at fair value, management's assessment of the collectability of the indemnification asset. Any amortization of changes in value should be limited to the contractual term of the indemnification agreement (that is, the lesser of the term of the indemnification agreement and the remaining life of the indemnified assets). The Company adopted this new authoritative guidance on January 1, 2013, and it did not have an impact on the Company's statements of operations and financial condition.

ASC Topic 210 “Disclosures about Offsetting Assets and Liabilities.” New authoritative accounting guidance under ASC Topic 210, “Disclosures about Offsetting Assets and Liabilities” amended prior guidance to require an entity to disclose both gross and net information about both instruments and transactions eligible for offset in the statement of financial position and instruments and transactions subject to an agreement similar to a master netting arrangement. The instruments and transactions would include derivatives, sale and repurchase agreements and reverse sale and repurchase agreements, and securities borrowing and securities lending arrangements. This new authoritative guidance was further amended to clarify the scope of offsetting disclosures. The Company adopted the new authoritative guidance on January 1, 2013, and it did not have an impact on the Company's statements of operations and financial condition. See disclosures in Note 15.

ASC Topic 220 “Comprehensive Income.” New authoritative accounting guidance under ASC Topic 220, “Comprehensive Income” amended prior guidance to improve the reporting of reclassifications out of accumulated other comprehensive income by requiring an entity to provide information about the amounts reclassified out of accumulated other comprehensive income by component. In addition, an entity is required to present, either on the face of the statement or in the notes, significant amounts reclassified out of accumulated other comprehensive income by the respective line items of net income if the amount reclassified is required under U.S. GAAP. The Company adopted this new authoritative guidance on January 1, 2013, and it did not have an impact on the Company's statements of operations and financial condition.

ASC Topic 815 “Derivatives and Hedging.” New authoritative accounting guidance under ASC Topic 815, “Derivatives and Hedging” amended prior guidance to permit the Fed Funds Effective Swap Rate (OIS) to be used as a U.S. benchmark interest

10

rate for hedge accounting purposes, in addition to U.S. government treasury obligation rates and London Interbank Offered Rate swap rate. The amendments also remove the restriction on using different benchmark rates for similar hedges. The new authoritative guidance will be effective prospectively for new and redesignated hedging relationships entered into on or after July 17, 2013 and is not expected to have an impact on the Company's statements of operations and financial condition.

ASC Topic 740 “Income Taxes.” New authoritative accounting guidance under ASC Topic 740, “Income Taxes” amended prior guidance to include explicit guidance on the financial statement presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. An unrecognized tax benefit, or a portion of an unrecognized tax benefit, should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, except as follows. To the extent a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional income taxes that would result from the disallowance of a tax position or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. The new authoritative guidance will be for reporting periods after January 1, 2014 and is not expected to have an impact on the Company's statements of operations and financial condition.

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 September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Distributed earnings allocated to common stock	$	6,636	$	548	$	17,653	$	1,643
Undistributed earnings	17,764		22,585		56,946		64,719
Net income	24,400		23,133		74,599		66,362
Less: preferred stock dividends and discount accretion	—		—		—		3,269
Net income available to common stockholders	24,400		23,133		74,599		63,093
Less: earnings allocated to participating securities	1		1		2		2
Earnings allocated to common stockholders	$	24,399	$	23,132	$	74,597	$	63,091
Weighted average shares outstanding for basic earnings per common share	54,565,089		54,346,827		54,471,541		54,226,241
Dilutive effect of equity awards	565,564		209,690		440,811		246,376
Weighted average shares outstanding for diluted earnings per common share	55,130,653		54,556,517		54,912,352		54,472,617
Basic earnings per common share	$	0.45	$	0.43	$	1.37	$	1.16
Diluted earnings per common share	0.44		0.42		1.36		1.16

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Note 4.    Business Combinations

The following 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, assets and liabilities acquired are recorded at their estimated fair values, net of applicable income tax effects.  The excess cost over fair value of net assets acquired is recorded as goodwill.  In the event that the fair value of net assets acquired exceeds the cost, the Company will record a gain on the acquisition.

On December 28, 2012, MB Financial Bank acquired a 100% equity interest in Celtic Leasing Corp. (“Celtic”), a privately held, mid-ticket equipment leasing company. Celtic specializes in solutions for the health care, legal, technology, and manufacturing industries. MB Financial Bank estimated contingent consideration related to the transaction which may be paid out at future dates. This consideration is based on the performance of lease residual values which will be determined in future years over an earn-out period. As the consideration paid for Celtic exceeded the net assets acquired, goodwill was recorded on the acquisition. Goodwill recorded in the transaction is not tax deductible. The purchase accounting entries are preliminary for lease loans, goodwill and other intangibles, as MB Financial Bank continues to analyze the portfolios and the underlying risks and collateral values of the assets. After the purchase accounting is finalized, the impact of any future changes to the amount of contingent consideration will be reflected in the statement of operations.

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

Assets Acquired and Liabilities Assumed

(Dollar Amounts in Thousands)

	Celtic
	December 28,
	2012
ASSETS
Cash and cash equivalents	$	31,647
Investment securities available for sale	635
Loans and leases	32,933
Premises and equipment	81
Goodwill	36,300
Other intangibles	5,028
Other assets	27,323
Total assets	$	133,947
LIABILITIES
Accrued expenses and other liabilities	$	75,290
Total liabilities	$	75,290
Cash paid on acquisition	$	58,657
Net gain recorded on acquisition	$	—

On July 14, 2013, the Company and Taylor Capital Group, Inc. (“Taylor Capital”) entered into an Agreement and Plan of Merger (the "Merger Agreement") whereby the Company will acquire Taylor Capital. The Merger Agreement provides that, upon the terms and subject to the conditions set forth therein, Taylor Capital will merge with and into the Company, with the Company as the surviving corporation in the merger. Immediately following the Merger, Taylor Capital's wholly owned subsidiary bank, Cole Taylor Bank, will merge with the Company's wholly owned subsidiary bank, MB Financial Bank. Cole Taylor Bank is a commercial bank headquartered in Chicago with $5.9 billion in assets, $3.3 billion in loans and $3.7 billion in deposits as of June 30, 2013.

Subject to the terms and conditions of the Merger Agreement, at the effective time of the Merger (the "Effective Time"), each share of Taylor Capital common stock and each share of Taylor Capital nonvoting convertible preferred stock ("non-voting preferred stock") will be converted into the right to receive, promptly following the Effective Time, (1) 0.64318 of a share of the Company's common stock and (2) $4.08 in cash. All "in-the-money" Taylor Capital stock options and warrants outstanding immediately prior to the Effective Time will be canceled in exchange for a cash payment as provided in the Merger Agreement, as will all then-

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outstanding unvested restricted stock awards of Taylor Capital; however, the cash consideration paid 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, will be exchanged for a share of a series of preferred stock of the Company with substantially identical terms. The Merger Agreement provides that any shares of Taylor Capital's Fixed Rate Cumulative Perpetual Preferred Stock, Series B, that are not repurchased or redeemed by Taylor Capital prior to the Merger will be exchanged for a series of preferred stock of the Company with substantially identical terms and repurchased or redeemed by the Company at or promptly after the Effective Time.

The merger is subject to regulatory approvals, approval by the Company's stockholders, approval by Taylor Capital stockholders and certain other customary closing conditions and is expected to close in the first half of 2014. In addition, it is a condition to the Company's obligation to complete the Merger that the shares of Taylor Capital common stock and Taylor Capital nonvoting preferred stock whose holders have perfected appraisal rights under Delaware law represent less than nine percent of the total number of outstanding shares of Taylor Capital common stock and Taylor Capital nonvoting preferred stock.

Note 5. Investment Securities

Carrying amounts and fair values of investment securities were as follows (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
September 30, 2013
Available for Sale
U.S. Government sponsored agencies and enterprises	$	50,678	$	1,849	$	—		$	52,527
States and political subdivisions	19,461		52		(201		)	19,312
Residential mortgage-backed securities	685,126		8,659		(2,509		)	691,276
Commercial mortgage-backed securities	50,944		2,502		—			53,446
Corporate bonds	265,293		927		(3,199		)	263,021
Equity securities	10,574		—		(33		)	10,541
	1,082,076		13,989		(5,942		)	1,090,123
Held to Maturity
States and political subdivisions	941,273		8,517		(3,481		)	946,309
Residential mortgage-backed securities	252,271		14,168		—			266,439
	1,193,544		22,685		(3,481		)	1,212,748
Total	$	2,275,620	$	36,674	$	(9,423	)	$	2,302,871
December 31, 2012
Available for Sale
U.S. Government sponsored agencies and enterprises	$	38,605	$	2,710	$	—		$	41,315
States and political subdivisions	679,991		45,571		(543		)	725,019
Residential mortgage-backed securities	930,413		14,038		(5,249		)	939,202
Commercial mortgage-backed securities	51,100		3,026		—			54,126
Corporate bonds	97,014		213		(553		)	96,674
Equity securities	11,398		447		(10		)	11,835
	1,808,521		66,005		(6,355		)	1,868,171
Held to Maturity
States and political subdivisions	237,563		21,039		—			258,602
Residential mortgage-backed securities	255,858		21,221		—			277,079
	493,421		42,260		—			535,681
Total	$	2,301,942	$	108,265	$	(6,355	)	$	2,403,852

Securities of states and political subdivisions with a fair value of $656.6 million were transferred from available for sale to held to maturity during the third quarter of 2013, which is the new cost basis. As of the date of the transfer, the resulting unrealized

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holding gain continues to be reported as a separate component of stockholders’ equity as accumulated other comprehensive income, net of tax. This unrealized gain will be amortized over the remaining life of the securities as a yield adjustment.

We do not have any meaningful direct or indirect holdings of subprime residential mortgage loans, home equity lines of credit, or any Fannie Mae or Freddie Mac preferred or common equity securities in our investment portfolio. 

The Company has no direct exposure to the State of Illinois, but approximately 27% of the state and political subdivisions portfolio consists of securities issued by municipalities located in Illinois as of September 30, 2013. Approximately 90% of such securities were general obligation issues as of September 30, 2013.

Unrealized losses on investment securities and the fair value of the related securities at September 30, 2013 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	$	9,050	$	(201	)	$	—	$	—		$	9,050	$	(201	)
Residential mortgage-backed securities	206,562		(2,040		)	49,104		(469		)	255,666		(2,509		)
Corporate bonds	147,181		(3,199		)	—		—			147,181		(3,199		)
Equity securities	10,541		(33		)	—		—			10,541		(33		)
	373,334		(5,473		)	49,104		(469		)	422,438		(5,942		)
Held to Maturity
States and political subdivisions	207,613		(3,481		)	—		—			207,613		(3,481		)
	207,613		(3,481		)	—		—			207,613		(3,481		)
Totals	$	580,947	$	(8,954	)	$	49,104	$	(469	)	$	630,051	$	(9,423	)

Unrealized losses on investment securities and the fair value of the related securities at December 31, 2012 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	$	57,540	$	(543	)	$	—	$	—		$	57,540	$	(543	)
Residential mortgage-backed securities	270,539		(5,083		)	16,434		(166		)	286,973		(5,249		)
Corporate bonds	58,241		(553		)	—		—			58,241		(553		)
Equity securities	30		(10		)	—		—			30		(10		)
Totals	$	386,350	$	(6,189	)	$	16,434	$	(166	)	$	402,784	$	(6,355	)

The total number of security positions in the investment portfolio in an unrealized loss position at September 30, 2013 was 353 compared to 117 at December 31, 2012. 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 or not the Company is more likely than not to sell the security before recovery of its cost basis.

As of September 30, 2013, 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 bonds approach their maturity date or repricing date or if market yields for such investments decline. Accordingly, as of September 30, 2013, management believes the impairments detailed in the table above are temporary.

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Changes in market interest rates can significantly influence the fair value of securities, and the fair value of our municipal security 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,
	2013		2012			2013			2012
Realized gains	$	1	$	282		$	15		$	472
Realized losses	—		(1		)	(1		)	(4		)
Impairment charges	—		—			—			(224		)
Net gains (losses)	$	1	$	281		$	14		$	244

The amortized cost and fair value of investment securities as of September 30, 2013 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	$	—	$	—
Due after one year through five years	319,032		318,598
Due after five years through ten years	7,695		7,711
Due after ten years	8,705		8,551
Equity securities	10,574		10,541
Residential and commercial mortgage-backed securities	736,070		744,722
	1,082,076		1,090,123
Held to maturity:
Due in one year or less	28,222		28,221
Due after one year through five years	245,125		245,545
Due after five years through ten years	122,547		122,533
Due after ten years	545,379		550,010
Residential mortgage-backed securities	252,271		266,439
	1,193,544		1,212,748
Total	$	2,275,620	$	2,302,871

Investment securities available for sale with carrying amounts of $1.0 billion and $989.6 million at September 30, 2013 and December 31, 2012, respectively, were pledged as collateral on public deposits and for other purposes as required or permitted by law.

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Note 6. Loans

Loans consist of the following at (in thousands):

	September 30, 2013		December 31, 2012
Commercial loans	$	1,169,009	$	1,220,472
Commercial loans collateralized by assignment of lease payments	1,468,814		1,303,020
Commercial real estate	1,638,368		1,761,832
Residential real estate	311,256		314,359
Construction real estate	136,146		110,261
Indirect vehicle	257,740		208,633
Home equity	274,484		305,186
Other consumer loans	57,418		93,317
Gross loans, excluding covered loans	5,313,235		5,317,080
Covered loans	273,497		449,850
Total loans(1)	$	5,586,732	$	5,766,930

 (1) Gross loan balances at September 30, 2013 and December 31, 2012 are net of unearned income, including net deferred loan fees of $1.5 million and $1.1 million, respectively.

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. 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. These policies and procedures are reviewed and approved by the Board of Directors 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.

Lease Loans. The Company makes lease loans to 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 polices 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 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 motorcycle loans, using a matrix-based credit analysis as part of the underwriting process. Each loan type has a separate matrix which consists of 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.

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The following table presents the contractual aging of the recorded investment in past due loans by class of loans as of September 30, 2013 and December 31, 2012 (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, 2013
Commercial	$	1,158,326	$	2,392	$	2,580	$	5,711	$	10,683	$	1,169,009
Commercial collateralized by assignment of lease payments	1,455,296		10,761		1,816		941		13,518		1,468,814
Commercial real estate
Healthcare	212,659		—		—		3,164		3,164		215,823
Industrial	371,940		161		2,101		1,394		3,656		375,596
Multifamily	316,495		2,808		—		2,387		5,195		321,690
Retail	344,390		236		449		8,632		9,317		353,707
Office	139,251		412		579		2,106		3,097		142,348
Other	223,385		3,443		229		2,147		5,819		229,204
Residential real estate	298,878		1,103		1,059		10,216		12,378		311,256
Construction real estate	133,742		—		89		2,315		2,404		136,146
Indirect vehicle	255,177		1,638		687		238		2,563		257,740
Home equity	260,055		4,505		2,911		7,013		14,429		274,484
Other consumer	57,357		54		1		6		61		57,418
Gross loans, excluding covered loans	5,226,951		27,513		12,501		46,270		86,284		5,313,235
Covered loans	138,876		12,091		5,681		116,849		134,621		273,497
Total loans (1)	$	5,365,827	$	39,604	$	18,182	$	163,119	$	220,905	$	5,586,732
Nonperforming loan aging	$	53,271	$	3,596	$	6,111	$	39,474	$	49,181	$	102,452
Non-covered loans related to FDIC transactions (2)	$	11,339	$	222	$	146	$	6,796	$	7,164	$	18,503
December 31, 2012
Commercial	$	1,215,957	$	639	$	754	$	3,122	$	4,515	$	1,220,472
Commercial collateralized by assignment of lease payments	1,288,341		11,252		2,847		580		14,679		1,303,020
Commercial real estate
Healthcare	192,039		—		—		3,238		3,238		195,277
Industrial	402,813		548		424		7,700		8,672		411,485
Multifamily	353,966		1,282		—		3,103		4,385		358,351
Retail	375,900		6,933		518		9,331		16,782		392,682
Office	186,665		742		280		1,125		2,147		188,812
Other	210,456		851		1,837		2,081		4,769		215,225
Residential real estate	306,927		382		1,248		5,802		7,432		314,359
Construction real estate	106,158		1,139		97		2,867		4,103		110,261
Indirect vehicle	206,126		1,588		498		421		2,507		208,633
Home equity	291,737		3,557		1,888		8,004		13,449		305,186
Other consumer	93,266		47		—		4		51		93,317
Gross loans, excluding covered loans	5,230,351		28,960		10,391		47,378		86,729		5,317,080
Covered loans	301,260		5,831		7,478		135,281		148,590		449,850
Total loans (1)	$	5,531,611	$	34,791	$	17,869	$	182,659	$	235,319	$	5,766,930
Nonperforming loan aging	$	69,836	$	3,171	$	3,718	$	40,261	$	47,150	$	116,986
Non-covered loans related to FDIC transactions (2)	$	12,752	$	312	$	1,542	$	7,115	$	8,969	$	21,721

(1)          Includes loans related to the InBank FDIC-assisted transaction completed by MB Financial Bank in 2009.

(2)          Loans related to the InBank FDIC-assisted transaction completed by MB Financial Bank in 2009.

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The following table presents the recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing by class of loans as of September 30, 2013 and December 31, 2012 (in thousands):

	September 30, 2013				December 31, 2012
			Loans past due				Loans past due
	Nonaccrual		90 days or more and still accruing		Nonaccrual		90 days or more and still accruing
Commercial	$	19,948	$	—	$	23,886	$	229
Commercial collateralized by assignment of lease payments	2,130		215		1,180		222
Commercial real estate:
Healthcare	3,164		—		3,238		—
Industrial	9,754		—		19,179		147
Multifamily	5,087		195		7,225		—
Office	10,916		—		3,263		—
Retail	3,740		—		17,019		—
Other	21,420		—		9,437		—
Residential real estate	13,041		—		10,943		—
Construction real estate	496		—		1,028		—
Indirect vehicle	1,516		—		1,494		—
Home equity	10,818		—		17,486		1,000
Other consumer	12		—		9		1
Total	$	102,042	$	410	$	115,387	$	1,599

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 at least annually and any time the situation warrants.

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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 as of September 30, 2013 and December 31, 2012 (in thousands):

	Pass		Special Mention		Substandard		Doubtful		Total
September 30, 2013
Commercial	$	1,091,129	$	17,720	$	60,160	$	—	$	1,169,009
Commercial collateralized by assignment of lease payments	1,457,577		4,814		6,423		—		1,468,814
Commercial real estate
Healthcare	188,946		21,556		2,157		3,164		215,823
Industrial	335,274		7,384		32,938		—		375,596
Multifamily	306,691		—		14,999		—		321,690
Retail	324,558		10,373		18,776		—		353,707
Office	132,490		2,732		7,126		—		142,348
Other	201,971		3,088		24,145		—		229,204
Construction real estate	126,902		6,264		2,980		—		136,146
Total	$	4,165,538	$	73,931	$	169,704	$	3,164	$	4,412,337
December 31, 2012
Commercial	$	1,136,294	$	33,068	$	50,895	$	215	$	1,220,472
Commercial collateralized by assignment of lease payments	1,292,241		3,322		7,457		—		1,303,020
Commercial real estate
Healthcare	170,265		21,774		—		3,238		195,277
Industrial	355,218		15,243		41,024		—		411,485
Multifamily	318,991		25,297		14,063		—		358,351
Retail	340,919		25,096		26,667		—		392,682
Office	159,056		7,120		22,636		—		188,812
Other	193,824		2,553		18,848		—		215,225
Construction real estate	97,724		552		11,985		—		110,261
Total	$	4,064,532	$	134,025	$	193,575	$	3,453	$	4,395,585

Approximately $76.5 million and $85.5 million of the substandard and doubtful loans were non-performing as of September 30, 2013 and December 31, 2012, respectively.

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For residential real estate, home equity, indirect vehicle and other consumer loan classes, the Company also 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 as of September 30, 2013 and December 31, 2012 (in thousands):

	Performing		Non-performing		Total
September 30, 2013
Residential real estate	$	298,215	$	13,041	$	311,256
Indirect vehicle	256,224		1,516		257,740
Home equity	263,666		10,818		274,484
Other consumer	57,406		12		57,418
Total	$	875,511	$	25,387	$	900,898
December 31, 2012
Residential real estate	$	303,416	$	10,943	$	314,359
Indirect vehicle	207,139		1,494		208,633
Home equity	286,700		18,486		305,186
Other consumer	93,307		10		93,317
Total	$	890,562	$	30,933	$	921,495

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The following tables present loans individually evaluated for impairment by class of loans as of September 30, 2013 and December 31, 2012 (in thousands):

	September 30, 2013
									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	$	6,236	$	5,364	$	872	$	—	$	6,509	$	—	$	7,378	$	—
Commercial collateralized by assignment of lease payments	681		681		—		—		666		6		256		6
Commercial real estate:
Healthcare	—		—		—		—		—		—		3,608		—
Industrial	7,547		6,927		620		—		7,902		—		9,316		—
Multifamily	546		546		—		—		665		—		739		—
Retail	3,002		3,002		—		—		3,233		—		3,123		—
Office	685		527		158		—		705		—		986		—
Other	3,149		3,139		10		—		3,353		—		4,785		—
Residential real estate	4,174		3,788		386		—		4,082		—		2,835		—
Construction real estate	—		—		—		—		—		—		—		—
Indirect vehicle	—		—		—		—		—		—		—		—
Home equity	577		577		—		—		577		—		872		—
Other consumer	—		—		—		—		—		—		—		—
With an allowance recorded:
Commercial	14,472		14,472		—		4,389		15,680		—		14,839		—
Commercial collateralized by assignment of lease payments	1,649		1,649		—		285		1,659		109		1,347		158
Commercial real estate:
Healthcare	10,868		3,164		7,704		495		10,869		—		7,302		—
Industrial	2,826		2,826		—		1,047		3,078		—		3,611		—
Multifamily	6,334		5,944		390		1,876		6,408		115		6,642		224
Retail	15,323		13,031		2,292		1,855		13,778		—		13,572		—
Office	3,607		3,214		393		1,047		3,735		—		4,391		—
Other	18,493		18,280		213		1,144		19,790		8		11,104		16
Residential real estate	12,690		12,063		627		3,033		12,494		—		12,965		—
Construction real estate	3,990		1,622		2,368		240		1,736		—		1,938		—
Indirect vehicle	138		106		32		—		146		—		54		—
Home equity	23,171		22,701		470		781		23,558		—		24,341		—
Other consumer	—		—		—		—		—		—		—		—
Total	$	140,158	$	123,623	$	16,535	$	16,192	$	140,623	$	238	$	136,004	$	404

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	December 31, 2012
	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	$	10,993	$	9,505	$	1,488	$	—	$	14,089	$	105
Commercial collateralized by assignment of lease payments	390		390		—		—		278		9
Commercial real estate:
Healthcare	10,943		3,238		7,705		—		2,751		—
Industrial	16,891		14,940		1,951		—		16,374		29
Multifamily	800		800		—		—		1,340		14
Retail	5,372		4,917		455		—		9,241		—
Office	1,568		1,568		—		—		1,151		—
Other	4,860		4,860		—		—		6,005		—
Residential real estate	3,097		2,711		386		—		6,476		—
Construction real estate	—		—		—		—		577		—
Indirect vehicle	—		—		—		—		—		—
Home equity	2,558		2,558		—		—		8,976		—
Other consumer	—		—		—		—		182		—
With an allowance recorded:
Commercial	14,484		14,381		103		3,620		8,455		—
Commercial collateralized by assignment of lease payments	885		885		—		188		1,130		73
Commercial real estate:
Healthcare	—		—		—		—		3,901		—
Industrial	5,525		4,238		1,287		1,255		2,443		—
Multifamily	8,233		7,249		984		2,284		5,847		130
Retail	23,144		17,257		5,887		3,604		10,058		—
Office	1,706		1,695		11		522		1,904		—
Other	4,661		4,577		84		1,263		6,082		16
Residential real estate	10,565		10,565		—		2,858		3,417		—
Construction real estate	4,552		2,167		2,385		497		3,775		—
Indirect vehicle	—		—		—		—		—		—
Home equity	13,765		13,763		2		850		4,800		—
Other consumer	—		—		—		—		—		—
Total	$	144,992	$	122,264	$	22,728	$	16,941	$	119,252	$	376

Impaired loans included accruing restructured loans of $29.9 million and $21.3 million that have been modified and are performing in accordance with those modified terms as of September 30, 2013 and December 31, 2012, respectively.  In addition, impaired loans included $22.3 million and $28.4 million of non-performing, restructured loans as of September 30, 2013 and December 31, 2012, 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

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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 nonperforming) through the calendar year of the restructuring that the historical payment performance has been established. As of September 30, 2013, there were no A/B structures. As of December 31, 2012 there was approximately $3.1 million in recorded investment in relation to one A/B structure. 

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 loss 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 have been restructured during the three months ended September 30, 2013 (dollars in thousands):

	September 30, 2013
	Number of Loans	Pre-Modification Recorded Investment		Post-Modification Recorded Investment		Charge-offs and Specific Reserves
Performing:
Residential real estate	1	$	95	$	95	$	—
Home equity	1	19		19		—
Total	2	$	114	$	114	$	—
Non-Performing:
Commercial real estate:
Healthcare	1	$	3,164	$	3,164	$	496
Multifamily	1	436		436		119
Retail	1	205		205		56
Residential real estate	1	394		394		—
Indirect vehicle	17	113		89		24
Home equity	5	397		397		—
Total	26	$	4,709	$	4,685	$	695

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The following table presents loans that have been restructured during the nine months ended September 30, 2013 (dollars in thousands):

	September 30, 2013
	Number of Loans	Pre-Modification Recorded Investment		Post-Modification Recorded Investment		Charge-offs and Specific Reserves
Performing:
Commercial real estate:
Multifamily	1	$	601	$	601	$	—
Residential real estate	5	854		854		—
Home equity	7	723		723		—
Total	13	$	2,178	$	2,178	$	—
Non-Performing:
Commercial	2	$	1,251	$	1,251	$	673
Commercial real estate:
Healthcare	1	3,164		3,164		496
Industrial	4	2,570		2,570		1,425
Multifamily	2	623		623		169
Retail	3	862		862		235
Other	1	84		84		23
Residential real estate	6	1,149		1,149		—
Indirect vehicle	20	127		103		24
Home equity	25	3,333		3,333		—
Total	64	$	13,163	$	13,139	$	3,045

The following table presents loans that have been restructured during the three months ended September 30, 2012 (dollars in thousands):

	September 30, 2012
	Number of Loans	Pre-Modification Recorded Investment		Post-Modification Recorded Investment		Charge-offs and Specific Reserves
Performing:
Home equity	7	$	401	$	325	$	76
Total	7	$	401	$	325	$	76
Non-Performing:
Commercial collateralized by assignment of lease payments	1	$	202	$	202	$	168
Commercial real estate:
Retail	1	202		202		200
Residential real estate	7	173		68		105
Home equity	5	347		232		115
Total	14	$	924	$	704	$	588

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The following table presents loans that have been restructured during the nine months ended September 30, 2012 (dollars in thousands):

	September 30, 2012
	Number of Loans	Pre-Modification Recorded Investment		Post-Modification Recorded Investment		Charge-offs and Specific Reserves
Performing:
Commercial real estate:
Multifamily	1	$	155	$	155	$	—
Retail	1	236		236		—
Residential real estate	2	808		808		—
Home equity	38	6,009		5,933		76
Total	42	$	7,208	$	7,132	$	76
Non-Performing:
Commercial	4	$	292	$	292	$	96
Commercial collateralized by assignment of lease payments	1	202		202		168
Commercial real estate:
Multifamily	1	149		149		40
Retail	4	923		923		232
Other	1	157		157		50
Residential real estate	13	637		401		236
Home equity	34	5,324		4,899		425
Total	58	$	7,684	$	7,023	$	1,247

Of the troubled debt restructurings entered into during the past twelve months, none subsequently defaulted during the nine months ended September 30, 2013.  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 tables present the troubled debt restructurings activity during the nine months ended September 30, 2013 (dollars in thousands):

	Performing			Non-performing
Beginning balance	$	21,256		$	28,418
Additions	2,178			13,163
Charge-offs	—			(3,127		)
Principal payments, net	(883		)	(8,008		)
Removals	—			(565		)
Transfer to other real estate owned	—			(206		)
Transfer from/to performing	8,458			1,098
Transfer from/to nonperforming	(1,098		)	(8,458		)
Ending balance	$	29,911		$	22,315

Approximately $8.5 million of non-performing troubled debt restructurings were transferred to performing status. A majority of these loans were identified as non-performing troubled debt restructurings during the first half of 2012 and have performed in accordance with the modified terms. The loans continue to be reported as performing troubled debt restructurings. The loans transferred to nonperforming in the table above were restructured in 2010 and 2011.

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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 and the pre-modification recorded investment during the nine months ended September 30, 2013 (dollars in thousands):

	September 30, 2013
	Extended		Extended				Extended
	Maturity,		Maturity, Delay		Extended		Maturity, Delay				Delay in
	Amortization		in Payments and		Maturity and		in Payments and				Payments or
	and Reduction		Reduction of		Reduction of		Reduction of		Extended		Reduction of
	of Interest Rate		Interest Rate		Interest Rate		Amount		Maturity		Interest Rate		Total
Commercial	$	42	$	—	$	1,209	$	—	$	—	$	—	$	1,251
Commercial collateralized by assignment of lease payments	—		—		—		—		—		—		—
Commercial real estate:
Healthcare	—		—		—		3,164		—		—		3,164
Industrial	—		—		—		—		2,570		—		2,570
Multifamily	187		—		—		—		601		436		1,224
Retail	256		205		401		—		—		—		862
Office	—		—		—		—		—		—		—
Other	84		—		—		—		—		—		84
Residential real estate	1,386		—		—		—		—		618		2,004
Construction real estate	—		—		—		—		—		—		—
Indirect vehicle	—		—		—		—		—		127		127
Home equity	1,509		—		708		—		227		1,611		4,055
Other consumer	—		—		—		—		—		—		—
Total	$	3,464	$	205	$	2,318	$	3,164	$	3,398	$	2,792	$	15,341

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The following table presents the activity in the allowance for credit losses, balance in allowance for credit losses and recorded investment in loans by portfolio segment and based on impairment method as of September 30, 2013 and 2012 (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, 2013
Allowance for credit losses:
Three Months Ended
Beginning balance	$	27,277		$	8,529	$	60,014		$	8,121	$	8,695		$	1,537	$	8,206		$	1,306	$	1,812		$	125,497
Transfer to (from) allowance for unfunded credit commitments	—			—		—			—		—			—		—			—		—			—
Charge-offs	1,686			—		1,236			713		26			572		437			485		—			5,155
Recoveries	579			—		966			48		420			372		228			74		—			2,687
Provision	(45		)	721		(3,983		)	347		(735		)	293		(152		)	368		(118		)	(3,304		)
Ending balance	$	26,125		$	9,250	$	55,761		$	7,803	$	8,354		$	1,630	$	7,845		$	1,263	$	1,694		$	119,725
Nine Months Ended
Beginning balance	$	24,943		$	7,755	$	61,056		$	6,941	$	11,222		$	1,324	$	9,401		$	1,562	$	4,075		$	128,279
Transfer to (from) allowance for unfunded credit commitments	—			—		—			—		500			—		—			—		(500		)	—
Charge-offs	3,030			—		5,131			2,074		855			1,930		2,547			1,501		—			17,068
Recoveries	1,808			1,131		5,353			461		827			1,111		442			185		—			11,318
Provision	2,404			364		(5,517		)	2,475		(3,340		)	1,125		549			1,017		(1,881		)	(2,804		)
Ending balance	$	26,125		$	9,250	$	55,761		$	7,803	$	8,354		$	1,630	$	7,845		$	1,263	$	1,694		$	119,725
Ending allowance balance attributable to loans:
Individually evaluated for impairment	$	4,389		$	285	$	7,464		$	3,033	$	240		$	—	$	781		$	—	$	657		$	16,849
Collectively evaluated for impairment	20,871			8,965		46,412			4,663		8,114			1,630		7,064			1,263		1,037			100,019
Acquired and accounted for under ASC 310-30 (1)	865			—		1,885			107		—			—		—			—		—			2,857
Total ending allowance balance	$	26,125		$	9,250	$	55,761		$	7,803	$	8,354		$	1,630	$	7,845		$	1,263	$	1,694		$	119,725
Loans:
Individually evaluated for impairment	$	19,836		$	2,330	$	60,600		$	15,851	$	1,622		$	106	$	23,278		$	—	$	—		$	123,623
Collectively evaluated for impairment	1,134,376			1,466,484		1,577,768			291,699		134,524			257,634		251,206			57,418		—			5,171,109
Acquired and accounted for under ASC 310-30 (1)	35,649			—		159,799			5,982		61,446			—		110			29,014		—			292,000
Total ending loans balance	$	1,189,861		$	1,468,814	$	1,798,167		$	313,532	$	197,592		$	257,740	$	274,594		$	86,432	$	—		$	5,586,732

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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, 2012
Allowance for credit losses:
Three Months Ended
Beginning balance	$	20,789	$	7,490		$	68,713		$	3,592	$	10,586		$	1,941	$	7,617	$	1,028	$	7,084		$	128,840
Charge-offs	75		—			2,994			474		71			433		1,209		332		—			5,588
Recoveries	306		111			12,893			8		752			224		303		77		—			14,674
Provision	1,181		(149		)	(12,253		)	738		(393		)	288		370		558		(3,340		)	(13,000		)
Ending balance	$	22,201	$	7,452		$	66,359		$	3,864	$	10,874		$	2,020	$	7,081	$	1,331	$	3,744		$	124,926
Nine Months Ended
Beginning balance	$	21,106	$	7,561		$	68,695		$	3,935	$	15,639		$	1,834	$	7,333	$	695	$	9,177		$	135,975
Transfer to (from) allowance for unfunded credit commitments	—		—			—			—		1,132			—		—		—		(1,132		)	—
Charge-offs	2,065		1,720			8,412			1,876		3,951			1,636		3,157		864		—			23,681
Recoveries	2,730		460			16,116			230		1,458			835		423		280		—			22,532
Provision	430		1,151			(10,040		)	1,575		(3,404		)	987		2,482		1,220		(4,301		)	(9,900		)
Ending balance	$	22,201	$	7,452		$	66,359		$	3,864	$	10,874		$	2,020	$	7,081	$	1,331	$	3,744		$	124,926
Ending allowance balance attributable to loans:
Individually evaluated for impairment	$	2,570	$	180		$	7,567		$	401	$	582		$	—	$	—	$	—	$	1,726		$	13,026
Collectively evaluated for impairment	19,345		7,272			56,851			3,144		10,292			2,020		7,081		1,331		2,018			109,354
Acquired and accounted for under ASC 310-30 (1)	286		—			1,941			319		—			—		—		—		—			2,546
Total ending allowance balance	$	22,201	$	7,452		$	66,359		$	3,864	$	10,874		$	2,020	$	7,081	$	1,331	$	3,744		$	124,926
Loans:
Individually evaluated for impairment	$	21,537	$	1,168		$	56,037		$	11,127	$	2,372		$	—	$	10,280	$	248	$	—		$	102,769
Collectively evaluated for impairment	1,033,534		1,218,193			1,714,224			293,787		147,500			206,973		304,438		84,403		—			5,003,052
Acquired and accounted for under ASC 310-30 (1)	78,275		—			269,348			7,116		125,515			—		568		38,202		—			519,024
Total ending loans balance	$	1,133,346	$	1,219,361		$	2,039,609		$	312,030	$	275,387		$	206,973	$	315,286	$	122,853	$	—		$	5,624,845

(1)  Loans acquired in FDIC-assisted transactions 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 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 in accordance with ASC 310-30 "Nonrefundable Fees and Other Costs" as these loans do not have evidence of credit deterioration since origination.

• Non-impaired loans (typically past-due loans, special mention loans and performing substandard loans) are accounted for in accordance with ASC 310-30 as 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.

In accordance with ASC 310-30, for both purchased non-impaired loans and purchased impaired loans, 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 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.

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During the three and nine months ended September 30, 2013 there was a negative provision for credit losses of $1.5 million and $2.5 million, respectively, and net recoveries of $677 thousand and $830 thousand, respectively, in relation to 15 pools of purchased loans with a total carrying amount of $219.1 million as of September 30, 2013. There was $2.9 million in allowance for loan losses related to these purchased loans at September 30, 2013 and $4.5 million at December 31, 2012.  The provision for credit losses and accompanying charge-offs are included in the table above.

Changes in the accretable yield for loans acquired in FDIC-assisted transactions and accounted for under ASC 310-30 were as follows for the three and nine months ended September 30, 2013 and 2012 (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Balance at beginning of period	$	6,360		$	9,411		$	5,685		$	18,703
Accretion	(2,427		)	(3,406		)	(2,859		)	(12,812		)
Other	—			403			1,107			517
Balance at end of period	$	3,933		$	6,408		$	3,933		$	6,408

In our FDIC-assisted transactions, the fair value of purchased 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, MB Financial Bank 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 losses is established for the impairment of the loans. A provision for loan 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 MB Financial Bank to pay back if certain thresholds are met) will increase or decrease accordingly.

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The carrying amount of covered loans and other purchased non-covered loans at September 30, 2013 consisted of loans as shown in the following table (in thousands):

September 30, 2013	Purchased Impaired Loans		Purchased Non-Impaired Loans		Total
Covered loans:
Commercial related (1)	$	11,130	$	5,738	$	16,868
Commercial	457		3,527		3,984
Commercial real estate	62,576		97,223		159,799
Construction real estate	53,444		8,002		61,446
Other	2,982		28,418		31,400
Total covered loans	$	130,589	$	142,908	$	273,497
Estimated receivable amount from the FDIC under the loss-share agreement (2)	$	36	$	10,013	$	10,049
Non covered loans:
Commercial related (3)	$	4,357	$	10,440	$	14,797
Other	89		3,617		3,706
Total non-covered loans	$	4,446	$	14,057	$	18,503

(1) Covered commercial related loans include commercial, commercial real estate and construction real estate loans acquired in connection with the Heritage and Benchmark FDIC-assisted transactions.

(2) Estimated reimbursable amounts from the FDIC under the loss-share agreement exclude $1.0 million in reimbursable amounts related to covered other real estate owned.

(3) Non covered commercial related loans include commercial, commercial real estate and construction real estate for InBank.

Outstanding balances on purchased loans from the FDIC were $305.0 million and $515.7 million as of September 30, 2013 and December 31, 2012, respectively.  The related carrying amount on loans purchased from the FDIC was $292.0 million and $471.6 million as of September 30, 2013 and December 31, 2012, respectively.

Note 7.   Goodwill and Intangibles

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. 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 unit with the fair value of the reporting unit.

The Company's annual assessment date is as of December 31. No impairment losses were recognized during the three or nine months ended September 30, 2013 or 2012. Goodwill is tested for impairment at the reporting unit level. All of our goodwill is allocated to MB Financial, Inc., which is the Company's only applicable reporting unit for purposes of testing goodwill impairment.  The carrying amount of goodwill was $423.4 million at September 30, 2013 and December 31, 2012.

The Company has other intangible assets consisting of core deposit and client relationship intangibles that had a remaining weighted average amortization period of approximately four years as of September 30, 2013.

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The following table presents the changes in the carrying amount of core deposit and client relationship intangibles, gross carrying amount, accumulated amortization, and net book value as of September 30, 2013 (in thousands):

	Nine Months Ended
	September 30,
	2013
Balance at beginning of period	$	29,512
Amortization expense	(4,595		)
Balance at end of period	$	24,917
Gross carrying amount	$	61,429
Accumulated amortization	(36,512		)
Net book value	$	24,917

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

Year ending December 31,	Amount
2013	$	1,489
2014	4,748
2015	4,030
2016	3,418
2017	3,071
Thereafter	8,161
	$	24,917

Note 8. Deposits

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

	September 30,		December 31,
	2013		2012
Demand deposit accounts, noninterest bearing	$	2,269,367	$	2,164,547
NOW and money market accounts	2,680,127		2,747,273
Savings accounts	843,671		811,333
Certificates of deposit, $100,000 or more	838,606		1,020,033
Other certificates of deposit	666,915		799,511
Total	$	7,298,686	$	7,542,697

Certificates of deposit of $100,000 or more included $238.5 million and $294.2 million of brokered deposits at September 30, 2013 and December 31, 2012, respectively.  Brokered deposits typically consist of smaller individual time certificates that have the same liquidity characteristics and yields consistent with time certificates of $100,000 or more.

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Note 9. Short-Term Borrowings

Short-term borrowings were as follows as of September 30, 2013 and December 31, 2012 (dollars in thousands):

	September 30, 2013				December 31, 2012
	Weighted Average				Weighted Average
	Cost		Amount		Cost		Amount
Customer repurchase agreements	0.22	%	$	240,600	0.23	%	$	208,242
Federal Home Loan Bank advances	—	%	—		3.58	%	12,360
	0.22	%	$	240,600	0.42	%	$	220,602

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 had a Federal Home Loan Bank fixed rate advance with a maturity date less than one year of $12.4 million in fixed rate advances at December 31, 2012. 

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 + 2.00%. As of September 30, 2013, no amount was outstanding. The line originally matured on March 8, 2013, was renewed and is scheduled to mature on March 7, 2014.

Note 10. Long-term Borrowings

The Company had Federal Home Loan Bank advances with remaining contractual maturities greater than one year of $4.3 million at September 30, 2013 and December 31, 2012. As of September 30, 2013, 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.

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.  The Company may also pledge certain investment securities as collateral for advances based on market value.  As of September 30, 2013 and December 31, 2012, the Company had $7.3 million and $28.4 million, respectively, of loans pledged as collateral for long-term Federal Home Loan Bank advances.  Additionally, as of September 30, 2013 and December 31, 2012, the Company had $29.2 million and $32.1 million, respectively, of investment securities pledged as collateral for advances from the Federal Home Loan Bank.

The Company had notes payable to banks totaling $17.7 million and $21.1 million at September 30, 2013 and December 31, 2012, respectively, which as of September 30, 2013, were accruing interest at rates ranging from 2.50% to 12.00%.  Lease investments includes equipment with an amortized cost of $25.9 million and $29.7 million at September 30, 2013 and December 31, 2012, respectively, that is pledged as collateral on these notes.

The Company had a $40.0 million10-year structured repurchase agreement as of September 30, 2013, which bears interest at a fixed rate borrowing of 4.75% and expires in 2016.

During the first quarter of 2013, MB Financial Bank pre-paid a $50.0 million subordinated debt facility.  Interest was payable at a rate of 3-month LIBOR +1.70%. 

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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, 2013 (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)
Junior Subordinated Notes:
Principal balance	$	30,928	$	23,196	$	5,155
Annual interest rate	3-mo LIBOR + 1.30%		3-mo LIBOR + 1.30%		3-mo LIBOR + 2.80%
Stated maturity date	December 15, 2037		October 30, 2037		January 23, 2034
Call date	December 15, 2012		October 30, 2012		January 23, 2009
Trust Preferred Securities:
Face Value	$	30,000	$	22,500	$	5,000
Annual distribution rate	3-mo LIBOR + 1.30%		3-mo LIBOR + 1.30%		3-mo LIBOR + 2.80%
Issuance date	September 2007		October 2007		December 2003
Distribution dates (1)	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, and the junior subordinated note issued by FOBB to FOBB Statutory Trust III was assumed by the Company upon completion of the acquisition.

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 on a date no earlier than the call dates noted in the table above.  Prior to these respective redemption dates, the junior subordinated notes could have been redeemed by the Company (in which case the trust preferred securities would also be redeemed) after the occurrence of: certain events that would have a negative tax effect on the Company or the trusts, would cause the trust preferred securities to no longer qualify as Tier 1 capital, or would result in a trust being treated as an investment company.  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, constitutes 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 stock and generally may not repurchase its 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, 2013 and December 31, 2012, the following financial instruments were outstanding, the contractual amounts of which represent off-balance sheet credit risk (in thousands):

	Contractual Amount
	September 30, 2013		December 31, 2012
Commitments to extend credit:
Home equity lines	$	216,992	$	239,771
Other commitments	1,139,255		911,166
Letters of credit:
Standby	70,720		66,247
Commercial	2,705		465

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, 2013, the maximum remaining term for any standby letters of credit was December 31, 2020.  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, 2013, the aggregate contractual amount of these letters of credit, which represents the maximum potential amount of future payments that the Company would be obligated to pay, increased $6.7 million to $73.4 million from $66.7 million at December 31, 2012.  Of the $73.4 million in commitments outstanding at September 30, 2013, approximately $52.6 million of the letters of credit have been issued or renewed since December 31, 2012.

Letters of credit issued on behalf of bank customers may be done on either a secured, partially secured or an unsecured basis.  If a letter of credit is secured or partially secured, the collateral can take various forms including bank accounts, investments, fixed assets, inventory, accounts receivable or real estate, among other things.  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, 2013, the Company had approximately $1.4 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, 2013, approximately 27% 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, 2013. The distribution of commitments to extend credit approximates the distribution of loans

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outstanding.  Standby letters of credit are granted primarily to commercial borrowers. Lease banking provides banking services to lessors located throughout the United States. Our leasing subsidiaries originate leases to companies located through 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 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.

Loans Held for Sale. The fair value of loans held for sale is determined using quoted secondary market prices and classified as level 2.

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. 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.

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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, 2013 and December 31, 2012, 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, 2013
Financial assets
Securities available for sale:
U.S Government sponsored agencies and enterprises	$	52,527	$	—	$	52,527	$	—
States and political subdivisions	19,312		—		19,312		—
Residential mortgage-backed securities	691,276		—		690,546		730
Commercial mortgage-backed securities	53,446		—		53,446		—
Corporate bonds	263,021		—		257,857		5,164
Equity securities	10,541		10,541		—		—
Loans held for sale	1,120		—		1,120		—
Assets held in trust for deferred compensation	10,077		10,077		—		—
Derivative financial instruments	19,112		—		19,112		—
Financial liabilities
Other liabilities (1)	9,892		9,892		—		—
Derivative financial instruments	19,060		—		19,060		—
December 31, 2012
Financial assets
Securities available for sale:
U.S. Government sponsored agencies and enterprises	$	41,315	$	—	$	41,315	$	—
States and political subdivisions	725,019		—		725,019		—
Residential mortgage-backed securities	939,202		—		938,354		848
Commercial mortgage-backed securities	54,126		—		54,126		—
Corporate bonds	96,674		—		91,451		5,223
Equity securities	11,835		11,835		—		—
Loans held for sale	7,492		—		7,492		—
Assets held in trust for deferred compensation	7,746		7,746		—		—
Derivative financial instruments	29,096		—		29,096		—
Financial liabilities
Other liabilities (1)	7,746		7,746		—		—
Derivative financial instruments	29,055		—		29,055		—

(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		Valuation	Unobservable
	September 30, 2013		Technique	Input	Range
Residential mortgage-backed securities	$	730	Discounted cash flows	Constant pre-payment rates
				(CPR) assumption	1% - 3% CPR
Corporate bonds	5,164		Discounted cash flows	Credit assumption	20% Loss

The Company did not have any transfers between Level 1 and Level 2 of the fair value hierarchy during the three and nine months ended September 30, 2013. 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,
(in thousands)	2013			2012
Balance, beginning of period	$	6,071		$	6,992
Other comprehensive income	(59		)	89
Principal payments	(118		)	(846		)
Impairment charge	—			(117		)
Balance, ending of period	$	5,894		$	6,118

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 (approximately 85%), 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 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.

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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, 2013 and December 31, 2012 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, 2013
Financial assets:
Impaired loans	$	84,500	$	—	$	—	$	84,500
Non-financial assets:
Foreclosed assets	57,009		—		—		57,009
December 31, 2012
Financial assets:
Impaired loans	$	62,258	$	—	$	—	$	62,258
Non-financial assets:
Foreclosed assets	60,228		—		—		60,228
Long-lived assets	2,314		—		—		2,314

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, 2013		Technique	Input	Range
Impaired loans	$	84,500	Appraisal of collateral	Appraisal adjustments - sales costs	5% - 10%
Foreclosed assets	57,009		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 methodologies for other financial assets and financial liabilities are discussed below:

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 and interest bearing deposits with banks: 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.

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

Loans Held for Sale: The fair value of the loans held for sale is determined using quoted secondary market prices and classified as level 2.

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.

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.

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

	September 30, 2013
	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	$	215,017	$	215,017	$	215,017	$	—	$	—
Interest bearing deposits with banks	41,700		41,700		41,700		—		—
Investment securities available for sale	1,090,123		1,090,123		10,541		1,073,688		5,894
Investment securities held to maturity	1,193,544		1,212,748		—		1,212,748		—
Non-marketable securities - FHLB and FRB stock	50,870		50,870		—		—		50,870
Loans held for sale	1,120		1,120		—		1,120		—
Loans, net	5,468,701		5,470,567		—		—		5,470,567
Accrued interest receivable	35,938		35,938		35,938		—		—
Derivative financial instruments	19,112		19,112		—		19,112		—
Financial Liabilities:
Noninterest bearing deposits	$	2,269,367	$	2,269,367	$	2,269,367	$	—	$	—
Interest bearing deposits	5,029,319		5,039,175		—		—		5,039,175
Short-term borrowings	240,600		240,595		—		—		240,595
Long-term borrowings	62,428		67,425		—		—		67,425
Junior subordinated notes issued to capital trusts	152,065		105,967		—		—		105,967
Accrued interest payable	1,908		1,908		1,908		—		—
Derivative financial instruments	19,060		19,060		—		19,060		—

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	December 31, 2012
	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	$	176,010	$	176,010	$	176,010	$	—	$	—
Interest bearing deposits with banks	111,533		111,533		111,533		—		—
Investment securities available for sale	1,868,171		1,868,171		11,835		1,850,265		6,071
Investment securities held to maturity	493,421		535,681		—		535,681		—
Non-marketable securities - FHLB and FRB stock	55,385		55,385		—		—		55,385
Loans held for sale	7,492		7,492		—		7,492		—
Loans, net	5,642,726		5,659,598		—		—		5,659,598
Accrued interest receivable	36,040		36,040		36,040		—		—
Derivative financial instruments	29,096		29,096		—		29,096		—
Financial Liabilities:
Non-interest bearing deposits	$	2,164,547	$	2,164,547	$	2,164,547	$	—	$	—
Interest bearing deposits	5,378,150		5,399,709		—		—		5,399,709
Short-term borrowings	220,602		220,683		—		—		220,683
Long-term borrowings	116,050		117,809		—		—		117,809
Junior subordinated notes issued to capital trusts	152,065		104,009		—		—		104,009
Accrued interest payable	2,828		2,828		2,828		—		—
Derivative financial instruments	29,055		29,055		—		29,055		—

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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,
	2013		2012		2013		2012
Total cost of share-based payment plans during the period	$	1,388	$	1,080	$	3,860	$	3,581
Amount of related income tax benefit recognized in income	548		430		1,530		$	1,431

The Company adopted the Omnibus Incentive Plan (the “Omnibus Plan”) in 1997.  In June 2011, the Company’s stockholders approved an amendment and restatement of the Omnibus Plan to add 2,300,000 authorized shares for a total of 8,300,000 shares of common stock for issuance to directors, officers, and employees of the Company or any of its subsidiaries.  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.  As of September 30, 2013, there were 1,617,262 shares available for future grants.

Annual equity-based incentive awards are typically granted to selected officers and employees mid-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 ended September 30, 2013:

	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, 2012	2,739,753		$	27.34
Granted	211,501		27.03
Exercised	(330,832	)	25.51
Expired or cancelled	(113,290	)	30.91
Forfeited	(17,857	)	20.18
Options outstanding as of September 30, 2013	2,489,275		$	27.44	4.94	$	9,407
Options exercisable as of September 30, 2013	1,809,183		$	29.72	3.67	$	4,764

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.

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 The following assumptions were used for options granted during the nine months ended September 30, 2013:

	September 30,
	2013
Risk-free interest rate	1.96		%
Expected volatility of Company’s stock	25.60		%
Expected dividend yield	1.74		%
Expected life of options	5.6 years
Weighted average fair value per option of options granted during the year	$	5.97

The total intrinsic value of options exercised during the nine months ended September 30, 2013 and 2012 was $929 thousand and $203 thousand, respectively.

The following is a summary of changes in restricted shares and units for the nine months ended September 30, 2013:

	Number of Shares and Units		Weighted Average Grant Date Fair Value
Shares Outstanding at December 31, 2012	634,211		$	18.82
Granted	270,983		26.91
Vested	(201,178	)	16.79
Forfeited	(13,983	)	20.52
Shares Outstanding at September 30, 2013	690,033		$	22.55

The Company issued 56,752 and 65,333 market-based restricted stock units in 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 Company issued 92,717 shares and 66,193 shares of market-based restricted stock in 2011 and 2010, respectively.  The market component of the vesting terms for each award requires that, for ten consecutive trading days, the closing price of the Company’s stock be at least $27.00 for awards issued in 2011 and $25.80 for awards issued in 2010.  The market components for awards issued in 2011 and 2010 have been satisfied as of September 30, 2013. Awards issued in 2011 will vest in full in 2014, on the third anniversary of the grant date. Awards issued in 2010 vested in full in 2013. A Monte Carlo simulation model was used to value the market-based restricted stock awards at the time of issuance.

Effective January 1, 2010, the Company began issuing shares of common stock under the Omnibus Plan as Salary Stock, classified as other stock-based awards, to certain executive officers. This stock is fully vested as of the grant date and the related expense is included in salaries and employee benefits on the Consolidated Statements of Operations. Holders of Salary Stock have all of the rights of a stockholder, including the right to vote the shares and the right to receive any dividends that may be paid thereon. As a condition of receiving the Salary Stock, the holders entered into agreements with the Company providing that they may not sell or otherwise transfer the shares of Salary Stock for two years, except in the event of disability or death.  During the three months ended March 31, 2013, the Company issued 876 shares of Salary Stock at a weighted average issuance price of $22.39 and subsequently ended the issuance of new shares of Salary Stock.

As of September 30, 2013, there was $14.2 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, 2013, the weighted-average period over which the unrecognized compensation expense is expected to be recognized was approximately 2.9 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 our 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 income statement.

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, 2013 was approximately $24 thousand, and the net amount payable as of December 31, 2012 was approximately $30 thousand.  The Company's credit exposure on interest rate swaps is limited to the Company's net favorable value and interest payments of all swaps to each counterparty. In such cases, collateral is generally required from the counterparties involved if the net value of the swaps exceeds a nominal amount.  At September 30, 2013, the Company’s credit exposure relating to interest rate swaps was approximately $17.9 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 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 $248 thousand at September 30, 2013.  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.

The Company’s derivative financial instruments are summarized below as of September 30, 2013 and December 31, 2012 (in thousands):

	Asset Derivatives								Liability Derivatives
	September 30, 2013				December 31, 2012				September 30, 2013					December 31, 2012
	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)	$	—	$	—	$	—	$	—	$	248	$	(26	)	$	3,707	$	(94	)
Stand-alone derivative instruments (2)
Interest rate swap contracts	570,472		17,813		460,956		27,740		571,445		(17,875		)	462,012		(27,832		)
Interest rate options contracts	84,095		307		70,346		157		84,095		(307		)	70,346		(157		)
Foreign exchange contracts	16,112		912		20,033		1,062		15,536		(818		)	19,337		(961		)
Mortgage banking derivatives	4,794		80		11,400		137		2,603		(34		)	4,000		(11		)
Total non-hedging derivative instruments	675,473		19,112		562,735		29,096		673,679		(19,034		)	555,695		(28,961		)
Total	$	675,473	$	19,112	$	562,735	$	29,096	$	673,927	$	(19,060	)	$	559,402	$	(29,055	)

(1) Hedged fixed-rate commercial real estate loans

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

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Amounts included in the other 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,
	2013			2012		2013			2012
Derivative instruments designated as hedges of fair value:
Interest rate swap contracts	$	(1	)	$	—	$	9		$	(36	)
Stand-alone derivative instruments
Interest rate swap contracts	7			6		30			19
Interest rate options contracts	—			—		—			—
Foreign exchange contracts	(12		)	14		(7		)	44
Mortgage banking derivatives	(16		)	9		(80		)	79
Total non-hedging derivative instruments	(21		)	29		(57		)	142
Total	$	(22	)	$	29	$	(48	)	$	106

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, 2013 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 swaps, caps and floors	$	3,483	$	—	$	3,483	$	14,724	$	—	$	14,724
Foreign currency forward contracts	67		—		67		764		—		764
Mortgage banking derivatives	—		—		—		34		—		34
Total derivatives	3,550		—		3,550		15,522		—		15,522
Repurchase agreements	—		—		—		240,600		—		240,600
Total	$	3,550	$	—	$	3,550	$	256,122	$	—	$	256,122

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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	$	440	$	(440	)	$	—	$	—	$	12,976	$	(440	)	$	(12,536	)	$	—
Counterparty B	1,090		(551		)	—		539		551		(551		)	—			—
Counterparty C	1,570		(1,570		)	—		—		1,949		(1,570		)	(379		)	—
Other counterparties	450		(1		)	—		449		46		(1		)	—			45
Total derivatives	3,550		(2,562		)	—		988		15,522		(2,562		)	(12,915		)	45
Repurchase agreements	—		—			—		—		240,600		—			(240,600		)	—
Total	$	3,550	$	(2,562	)	$	—	$	988	$	256,122	$	(2,562	)	$	(253,515	)	$	45

Information about the Company's financial instruments that are eligible for offset in the consolidated balance sheet as of December 31, 2012 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 swaps, caps and floors	$	192	$	—	$	192	$	27,890	$	—	$	27,890
Foreign currency forward contracts	43		—		43		929		—		929
Mortgage banking derivatives	1		—		1		11		—		11
Total derivatives	236		—		236		28,830		—		28,830
Repurchase agreements	—		—		—		208,242		—		208,242
Total	$	236	$	—	$	236	$	237,072	$	—	$	237,072

	Financial Assets									Financial Liabilities
	Net Amount Recognized		Financial Instruments			Collateral		Net Amount		Net Amount Recognized		Financial Instruments			Collateral			Net Amount
Derivatives:
Counterparty A	$	68	$	(68	)	$	—	$	—	$	25,497	$	(68	)	$	(25,429	)	$	—
Counterparty B	84		(84		)	—		—		633		(84		)	(549		)	—
Counterparty C	36		(36		)	—		—		2,305		(36		)	(2,269		)	—
Other counterparties	48		(42		)	—		6		395		(42		)	(298		)	55
Total derivatives	236		(230		)	—		6		28,830		(230		)	(28,545		)	55
Repurchase agreements	—		—			—		—		208,242		—			(208,242		)	—
Total	$	236	$	(230	)	$	—	$	6	$	237,072	$	(230	)	$	(236,787	)	$	55

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Note 16.   Common and Preferred Stock

In 2008, the Company issued 196,000 shares of Fixed Rate Cumulative Perpetual Preferred Stock, Series A ("the Series A Preferred Stock"), liquidation amount $1,000 per share, for an aggregate purchase price of $196.0 million as part of the Troubled Asset Relief Program (“TARP”) Capital Purchase Program of the United States Department of the Treasury (the “Treasury”).  The Series A Preferred Stock qualified as Tier 1 capital and provided for cumulative dividends on the liquidation preference amount on a quarterly basis at a rate of 5% per annum for the first five years, and 9% per annum thereafter.  Concurrent with issuing the Series A Preferred Stock, the Company issued to the Treasury a 10 year warrant (the “Warrant”) to purchase 1,012,048 shares (subsequently reduced to 506,024 shares, as described below) of the Company’s Common Stock at an exercise price of $29.05 per share.

On September 17, 2009, the Company completed a public offering of its common stock by issuing 12,578,125 shares of common stock for aggregate gross proceeds of $201.3 million.  The net proceeds to the Company after deducting underwriting discounts and commissions and offering expenses were approximately $190.9 million.  With the proceeds from this offering and the proceeds received by the Company from issuances pursuant to its Dividend Reinvestment and Stock Purchase Plan, the Company received aggregate gross proceeds from “Qualified Equity Offerings” in excess of the $196.0 million aggregate liquidation preference amount of the Series A Preferred Stock.  As a result, the number of shares of the Company’s common stock underlying the Warrant was reduced by 50%, from 1,012,048 shares to 506,024 shares.

On March 14, 2012, the Company repurchased all $196.0 million of the Series A Preferred Stock. On May 2, 2012, the Company repurchased the Warrant in full for approximately $1.5 million.

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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 majority owned 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: capital markets and international banking fees, commercial deposit and treasury management fees, net lease financing income, trust and asset management fees, and card fees. Non-interest income also included loan service fees, consumer and other deposit service fees, brokerage fees, net gain (loss) on investment securities, increase in cash surrender value of life insurance, net loss on sale of assets, accretion of the FDIC indemnification asset, net gain (loss) recognized on other real estate owned, net gains on sale of loans 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, other real estate expenses (net of rental income), prepayment fees on interest bearing liabilities and other operating expenses.  Additionally, dividends on preferred shares reduced net income available to common stockholders for the nine months ended September 30, 2012.

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 those interest bearing liabilities.  Non-interest income and non-interest expenses are impacted by growth of operations and growth in the number of loan and deposit accounts through both acquisitions and core banking 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.

The Company had net income and net income available to common stockholders of $24.4 million for the three months ended September 30, 2013 compared to net income and net income available to common stockholders of $23.1 million for the three months ended September 30, 2012. Fully diluted earnings per common share were $0.44 for the three months ended September 30, 2013 compared to $0.42 per common share for the three months ended September 30, 2012.

The Company had net income and net income available to common stockholders of $74.6 million for the nine months ended September 30, 2013 compared to net income of $66.4 million and net income available to common stockholders of $63.1 million for the nine months ended September 30, 2012. Fully diluted earnings per common share were $1.36 for the nine months ended September 30, 2013 compared to $1.16 per common share for the nine months ended September 30, 2012.

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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 Compliance and Audit Committee of our Board of Directors.

Allowance for Loan Losses.  Subject to the use of estimates, assumptions, and judgments, management's evaluation process used to determine the adequacy of the allowance for loan losses combines several factors: management's ongoing review and grading of the loan portfolio, consideration of past loan loss experience, trends in past due and nonperforming 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 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 losses, based on their judgments about information available to them at the time of their examination. We believe the allowance for loan losses is adequate and properly recorded in the financial statements.  See “Allowance for Loan 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, 2013, the aggregate residual value of the equipment leased under our direct finance, leveraged, and operating leases totaled $74.0 million.  See Note 1 and Note 6 of our December 31, 2012 audited consolidated financial statements contained in our Annual Report Form 10-K for the year ended December 31, 2012 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, 2013, the Company had $107 thousand of uncertain tax positions.  The Company elects to treat interest and penalties recognized for the underpayment of income taxes as income tax expense.  However, interest and penalties imposed by taxing authorities on issues specifically addressed in ASC Topic 740 will be taken out of the tax reserves up to the amount allocated to interest and penalties.  The amount of interest and penalties exceeding the amount allocated in the tax reserves will be treated as income tax expense.  As of September 30, 2013, the Company had approximately $12 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

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addition, changes in market conditions may reduce the availability of quoted prices or observable data. For example, reduced liquidity in the capital markets or changes in secondary market activities could result in observable market inputs becoming unavailable. Therefore, when market data is not available, the Company would use valuation techniques requiring more management judgment to estimate the appropriate fair value measurement.

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

Goodwill.  The excess of the cost of an acquisition over the fair value of the net assets acquired consists of goodwill, and core deposit and client relationship intangibles.  See Note 8 of our December 31, 2012 audited consolidated financial statements contained in our Annual Report Form 10-K for the year ended December 31, 2012 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 unit with the fair value of the reporting unit.

The Company’s annual assessment date for goodwill impairment testing is as of December 31.  No impairment losses were recognized during the three and nine months ended September 30, 2013 and 2012. We are not aware of any events or circumstances subsequent to our annual goodwill impairment testing date of December 31, 2012 that would indicate impairment of goodwill at September 30, 2013.

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 effects on results of operations and financial condition.

Net Interest Income

The following tables present, 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 tables 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.

Reconciliations of net interest income and net interest margin on a tax-equivalent basis 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.

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	Three Months Ended September 30,
(dollars in thousands)	2013						2012
	Average				Yield/		Average				Yield/
	Balance		Interest		Rate		Balance		Interest		Rate
Interest Earning Assets:
Loans (1) (2) (3)	$	5,196,948	$	57,325	4.38	%	$	5,350,911	$	65,301	4.85	%
Loans exempt from federal income taxes (4)	360,060		4,293		4.67		284,196		3,354		4.62
Taxable investment securities	1,292,366		6,330		1.96		1,418,549		7,287		2.05
Investment securities exempt from federal income taxes (4)	946,396		12,577		5.32		843,908		11,665		5.53
Federal funds sold	6,793		7		0.40		—		—		—
Other interest bearing deposits	316,210		193		0.24		483,622		312		0.26
Total interest earning assets	8,118,773		$	80,725	3.94		8,381,186		$	87,919	4.17
Non-interest earning assets	1,142,518						1,134,973
Total assets	$	9,261,291					$	9,516,159
Interest Bearing Liabilities:
Deposits:
NOW and money market deposit	$	2,695,479	$	862	0.13	%	$	2,601,181	$	1,026	0.16	%
Savings deposit	844,647		137		0.06		796,229		181		0.09
Time deposits	1,572,987		3,434		0.87		2,105,389		6,167		1.17
Short-term borrowings	205,946		112		0.22		233,780		342		0.58
Long-term borrowings and junior subordinated notes	215,041		1,367		2.49		371,057		2,872		3.03
Total interest bearing liabilities	5,534,100		$	5,912	0.42		6,107,636		$	10,588	0.69
Non-interest bearing deposits	2,258,357						2,020,762
Other non-interest bearing liabilities	171,336						139,915
Stockholders’ equity	1,297,498						1,247,846
Total liabilities and stockholders’ equity	$	9,261,291					$	9,516,159
Net interest income/interest rate spread (5)			$	74,813	3.52	%			$	77,331	3.48	%
Less: taxable equivalent adjustment			5,905						5,256
Net interest income, as reported			$	68,908					$	72,075
Net interest margin (6)					3.37	%					3.42	%
Tax equivalent effect					0.29	%					0.25	%
Net interest margin on a fully tax equivalent basis (6)					3.66	%					3.67	%

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

(2)       Interest income includes amortization of deferred loan origination fees of $839 thousand and $749 thousand for the three months ended September 30, 2013 and 2012, respectively.

(3)       Loans held for sale are included in the average loan balance listed.  Related interest income is included in loan interest income.

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

(5)       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.

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

Net interest income on a fully tax equivalent basis decreased $2.5 million during the three months ended September 30, 2013 compared to the three months ended September 30, 2012, primarily due to lower average earning asset balances, as a result of a $254.8 million decrease in covered loans. The net interest margin, expressed on a fully tax equivalent basis, was 3.66% for the third quarter of 2013 and 3.67% for the third quarter of 2012.

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	Nine Months Ended September 30,
(dollars in thousands)	2013						2012
	Average				Yield/		Average				Yield/
	Balance		Interest		Rate		Balance		Interest		Rate
Interest Earning Assets:
Loans (1) (2) (3)	$	5,292,496	$	173,217	4.38	%	$	5,446,682	$	202,017	4.95	%
Loans exempt from federal income taxes (4)	327,618		11,188		4.50		271,297		9,788		4.74
Taxable investment securities	1,383,975		18,749		1.81		1,554,243		27,053		2.32
Investment securities exempt from federal income taxes (4)	930,653		37,537		5.38		798,660		33,268		5.55
Federal funds sold	3,249		9		0.37		—		—		—
Other interest bearing deposits	232,529		420		0.24		329,252		639		0.26
Total interest earning assets	8,170,520		$	241,120	3.95		8,400,134		$	272,765	4.34
Non-interest earning assets	1,162,210						1,176,758
Total assets	$	9,332,730					$	9,576,892
Interest Bearing Liabilities:
Deposits:
NOW and money market deposit	$	2,702,567	$	2,622	0.13	%	$	2,619,297	$	3,278	0.17	%
Savings deposit	835,754		409		0.07		784,706		642		0.11
Time deposits	1,692,760		12,243		0.97		2,219,554		20,272		1.22
Short-term borrowings	195,677		395		0.27		225,390		910		0.54
Long-term borrowings and junior subordinated notes	226,133		4,324		2.52		393,464		9,322		3.11
Total interest bearing liabilities	5,652,891		$	19,993	0.47		6,242,411		$	34,424	0.74
Non-interest bearing deposits	2,194,648						1,924,656
Other non-interest bearing liabilities	193,203						131,890
Stockholders’ equity	1,291,988						1,277,935
Total liabilities and stockholders’ equity	$	9,332,730					$	9,576,892
Net interest income/interest rate spread (5)			$	221,127	3.48	%			$	238,341	3.60	%
Less: taxable equivalent adjustment			17,054						15,069
Net interest income, as reported			$	204,073					$	223,272
Net interest margin (6)					3.34	%					3.55	%
Tax equivalent effect					0.28	%					0.24	%
Net interest margin on a fully tax equivalent basis (6)					3.62	%					3.79	%

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

(2)       Interest income includes amortization of deferred loan origination fees of $2.6 million and $2.5 million for the nine months ended September 30, 2013 and 2012, respectively.

(3)       Loans held for sale are included in the average loan balance listed.  Related interest income is included in loan interest income.

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

(5)       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.

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

Net interest income on a fully tax equivalent basis decreased $17.2 million during the nine months ended September 30, 2013 compared to the nine months ended September 30, 2012, primarily due to lower average earning asset balances (as a result of a $244.4 million decrease in covered loans) as well as the decline in net interest margin. The net interest margin, expressed on a fully tax equivalent basis, was 3.62% for the nine months ended September 30, 2013 and 3.79% for the nine months ended September 30, 2012. The decrease in margin during 2013 was primarily due to a decrease in yields on loans and investment securities, partially offset by a lower cost of funds.

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Non-interest Income

	Three Months Ended September 30,
	2013			2012			Increase/ (Decrease)			Percentage Change
Non-interest income (in thousands):
Capital markets and international banking fees	$	972		$	1,400		$	(428	)	(30.6	)%
Commercial deposit and treasury management fees	6,327			5,860			467			8.0	%
Lease financing, net	14,070			9,671			4,399			45.5	%
Trust and asset management fees	4,799			4,428			371			8.4	%
Card fees	2,745			2,388			357			14.9	%
Loan service fees	1,427			1,075			352			32.7	%
Consumer and other deposit service fees	3,648			3,786			(138		)	(3.6	)%
Brokerage fees	1,289			1,185			104			8.8	%
Net gain on investment securities	1			281			(280		)	99.6	%
Increase in cash surrender value of life insurance	851			890			(39		)	(4.4	)%
Net loss on sale of assets	—			(12		)	12			100.0	%
Accretion of FDIC indemnification asset	64			204			(140		)	(68.6	)%
Net loss recognized on other real estate owned	(791		)	(3,938		)	3,147			79.9	%
Net gain on sale of loans	177			575			(398		)	(69.2	)%
Other operating income	1,337			760			577			75.9	%
Total non-interest income	$	36,916		$	28,553		$	8,363		29.3	%

Non-interest income increased by $8.4 million, or 29.3%, for the three months ended September 30, 2013 compared to the three months ended September 30, 2012.

• Net lease financing revenue increased due to the impact of leasing revenues attributed to Celtic (approximately $6 million).

• Non-interest income was also impacted by lower losses recognized on other real estate owned in the third quarter of 2013 compared to the third quarter of 2012 due to stabilization in appraised values.

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	Nine Months Ended September 30,
	2013		2012			Increase/ (Decrease)			Percentage Change
Non-interest income (in thousands):
Capital markets and international banking fees	$	2,719	$	2,700		$	19		0.7	%
Commercial deposit and treasury management fees	18,322		17,541			781			4.5	%
Lease financing, net	45,435		23,963			21,472			89.6	%
Trust and asset management fees	14,167		13,367			800			6.0	%
Card fees	8,175		6,863			1,312			19.1	%
Loan service fees	4,349		3,409			940			27.6	%
Consumer and other deposit service fees	10,487		10,773			(286		)	(2.7	)%
Brokerage fees	3,680		3,704			(24		)	(0.6	)%
Net gain on investment securities	14		244			(230		)	94.3	%
Increase in cash surrender value of life insurance	2,537		2,677			(140		)	(5.2	)%
Net loss on sale of assets	—		(37		)	37			100.0	%
Accretion of FDIC indemnification asset	307		901			(594		)	(65.9	)%
Net gain (loss) recognized on other real estate owned	894		(15,968		)	16,862			105.6	%
Net gain on sale of loans	1,322		1,503			(181		)	(12.0	)%
Other operating income	3,835		3,674			161			4.4	%
Total non-interest income	$	116,243	$	75,314		$	40,929		54.3	%

Non-interest income increased by $40.9 million, or 54.3%, for the nine months ended September 30, 2013 compared to the nine months ended September 30, 2012, driven by revenue from our key fee initiatives.

• Net lease financing income increased due to the impact of leasing revenues attributable to Celtic (approximately $19 million), as well as an increase in remarketing gains and fees from the sale of equipment maintenance contracts.

• Non-interest income was also impacted by gains recognized on other real estate owned in 2013, compared to losses recognized on other real estate owned during 2012.

• Card fee income increased due to fees earned on prepaid, debit and credit cards.

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Non-interest Expenses

	Three Months Ended September 30,
	2013		2012		Increase/ (Decrease)			Percentage Change
Non-interest expenses (in thousands):
Salaries and employee benefits	$	44,918	$	42,083	$	2,835		6.7	%
Occupancy and equipment expense	8,797		8,274		523			6.3	%
Computer services and telecommunication expense	4,870		3,777		1,093			28.9	%
Advertising and marketing expense	1,917		1,936		(19		)	(1.0	)%
Professional and legal expense	3,102		1,554		1,548			99.6	%
Other intangibles amortization expense	1,513		1,251		262			20.9	%
Branch impairment charges	—		758		(758		)	(100.0	)%
Other real estate expense, net	240		874		(634		)	(72.5	)%
Prepayment fees on interest bearing liabilities	—		12,682		(12,682		)	(100.0	)%
Other operating expenses	10,117		7,976		2,141			26.8	%
Total non-interest expenses	$	75,474	$	81,165	$	(5,691	)	(7.0	)%

Non-interest expenses decreased by $5.7 million, or 7.0%, for the three months ended September 30, 2013 from the three months ended September 30, 2012.

• Prepayment fees of $12.7 million related to the early redemption of interest bearing liabilities were recognized in the third quarter of 2012.

• Salaries and employee benefits increased due to annual salary increases and the impact of Celtic.

• Other operating expenses were higher as a result of an increase in the clawback liability related to our loss share agreements with the FDIC recorded during the third quarter of 2013.

• Professional and legal expense increased due to merger related expenses related to fairness opinion, legal and consulting expenses.

• Computer services and telecommunication expense increased due to an increased investment in security, storage and our key fee initiatives.

	Nine Months Ended September 30,
	2013		2012		Increase/ (Decrease)			Percentage Change
Non-interest expenses (in thousands):
Salaries and employee benefits	$	132,341	$	122,658	$	9,683		7.9	%
Occupancy and equipment expense	27,609		27,032		577			2.1	%
Computer services and telecommunication expense	13,374		11,339		2,035			17.9	%
Advertising and marketing expense	6,187		5,848		339			5.8	%
Professional and legal expense	5,750		4,470		1,280			28.6	%
Other intangibles amortization expense	4,595		3,759		836			22.2	%
Branch impairment charges	—		758		(758		)	(100.0	)%
Other real estate expense, net	572		2,541		(1,969		)	(77.5	)%
Prepayment fees on interest bearing liabilities	—		12,682		(12,682		)	(100.0	)%
Other operating expenses	28,413		24,243		4,170			17.2	%
Total non-interest expenses	$	218,841	$	215,330	$	3,511		1.6	%

Non-interest expenses increased by $3.5 million, or 1.6%, for the nine months ended September 30, 2013 from the nine months ended September 30, 2012.

• Prepayment fees of $12.7 million related to the early redemption of interest bearing liabilities were recognized in the third quarter of 2012.

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• Salaries and employee benefits increased due to annual salary increases and the impact of Celtic.

• Other operating expenses were higher as a result of an increase in the clawback liability related to our loss share agreements with the FDIC recorded during the nine months ended September 30, 2013.

• Computer services and telecommunication expenses increased due primarily to an increased investment in security, storage and our key fee initiatives.

• Other real estate expense decreased due to fewer OREO properties in 2013.

Income Taxes

Income tax expense for the three months ended September 30, 2013 and 2012 was $9.3 million. Income tax expense for the nine months ended September 30, 2013 was $29.7 million compared to income tax expense of $26.8 million for the nine months ended September 30, 2012.  The increase was primarily due to an increase in our pre-tax income during the nine months ended September 30, 2013. 

Balance Sheet

Total assets decreased $314.2 million, or 3.3%, from $9.6 billion at December 31, 2012 to $9.3 billion at September 30, 2013.  Investment securities decreased $82.4 million, or 3.4%, from December 31, 2012 to September 30, 2013 mostly as a result of the principal payments received on mortgage-backed securities that were not reinvested in the portfolio. Over the past year, we changed the mix of our investment securities portfolio by allocating a larger portion of the portfolio to municipal securities and corporate bonds.

Total loans excluding covered loans decreased by $3.8 million to $5.3 billion at September 30, 2013 from December 31, 2012. Our loan portfolio mix improved over the past twelve months from the standpoint of lowering our real estate-related exposure, as commercial and lease loan balances increased while commercial real estate and construction loan balances decreased.

Total liabilities decreased by $347.9 million, or 4.2%, from $8.3 billion at December 31, 2012 to $7.9 billion at September 30, 2013. Total deposits decreased by $244.0 million, or 3.2%, to $7.3 billion at September 30, 2013 from December 31, 2012 due to the decline in certificates of deposits. Total borrowings decreased by $33.6 million, or 6.9%, to $455.1 million at September 30, 2013. The decrease in total borrowings was primarily due to the prepayment of the $50.0 million subordinated debt facility in the first quarter of 2013.

Total stockholders’ equity increased $33.7 million to $1.3 billion at September 30, 2013 compared to December 31, 2012 primarily as a result of our earnings for the nine months ended September 30, 2013 partly offset by dividends and the decrease in accumulated other comprehensive income.

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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, 2013				December 31, 2012				September 30, 2012
	Amortized Cost		Fair Value		Amortized Cost		Fair Value		Amortized Cost		Fair Value
Available for sale
U.S. Government sponsored agencies and enterprises	$	50,678	$	52,527	$	38,605	$	41,315	$	39,233	$	42,187
States and political subdivisions	19,461		19,312		679,991		725,019		620,489		668,966
Residential mortgage-backed securities	685,126		691,276		930,413		939,202		1,009,509		1,021,983
Commercial mortgage-backed securities	50,944		53,446		51,100		54,126		51,156		53,979
Corporate bonds	265,293		263,021		97,014		96,674		16,617		16,626
Equity securities	10,574		10,541		11,398		11,835		10,644		11,231
	1,082,076		1,090,123		1,808,521		1,868,171		1,747,648		1,814,972
Held to maturity
States and political subdivisions	941,273		946,309		237,563		258,602		238,211		259,950
Residential mortgage-backed securities	252,271		266,439		255,858		277,079		257,640		277,039
	1,193,544		1,212,748		493,421		535,681		495,851		536,989
Total	$	2,275,620	$	2,302,871	$	2,301,942	$	2,403,852	$	2,243,499	$	2,351,961

Securities of states and political subdivisions with a fair value of $656.6 million were transferred from available for sale to held to maturity during the third quarter of 2013, which is the new cost basis. As of the date of the transfer, the resulting unrealized holding gain continues to be reported as a separate component of stockholders’ equity as accumulated other comprehensive income, net of tax. This unrealized gain will be amortized over the remaining life of the securities as a yield adjustment.

We do not have any meaningful direct or indirect holdings of subprime residential mortgage investment securities, home equity lines of credit investment securities, or any Fannie Mae or Freddie Mac preferred or common equity securities in our investment portfolio. 

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Loan Portfolio

The following table sets forth the composition of our loan portfolio (dollars in thousands):

	September 30, 2013				December 31, 2012				September 30, 2012
	Amount		% of Total		Amount		% of Total		Amount		% of Total
Commercial related credits:
Commercial loans	$	1,169,009	21	%	$	1,220,472	21	%	$	1,073,981	19	%
Commercial loans collateralized by assignment of lease payments	1,468,814		26		1,303,020		23		1,219,361		22
Commercial real estate	1,638,368		29		1,761,832		30		1,770,261		31
Construction real estate	136,146		2		110,261		2		149,872		3
Total commercial related credits	4,412,337		78		4,395,585		76		4,213,475		75
Other loans:
Residential real estate	311,256		6		314,359		5		308,866		5
Indirect vehicle	257,740		5		208,633		4		206,973		3
Home equity	274,484		5		305,186		5		314,718		6
Other consumer loans	57,418		1		93,317		2		84,651		2
Total other loans	900,898		17		921,495		16		915,208		16
Gross loans excluding covered loans	5,313,235		95		5,317,080		92		5,128,683		91
Covered loans (1)	273,497		5		449,850		8		496,162		9
Total loans (2)	$	5,586,732	100	%	$	5,766,930	100	%	$	5,624,845	100	%

(1) Loans that MB Financial Bank will share losses with the FDIC are referred to as “covered loans.”

(2) Gross loan balances at September 30, 2013, December 31, 2012, and September 30, 2012 are net of unearned income, including net deferred loans fees of $1.5 million, $1.1 million, and $955 thousand, respectively.

Our loan portfolio mix improved over the past twelve months from the standpoint of lowering our real estate-related exposure, as commercial and lease loan balances increased by 15.0% while commercial real estate and construction loan balances decreased by 7.6%.

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 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 defined material weakness.

Non-performing loans exclude purchased credit-impaired loans that were acquired as part of the FDIC-assisted transactions (Heritage, InBank, and Benchmark completed in 2009 and Broadway and New Century completed in 2010).  Fair value of these loans as of acquisition includes estimates of credit losses.  See Note 6 of the notes to our consolidated financial statements for further information regarding purchased credit-impaired loans.

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The following table sets forth the amounts of non-performing loans and non-performing assets at the dates indicated (dollars in thousands):

	September 30, 2013			December 31, 2012			September 30, 2012
Non-performing loans:
Non-accruing loans	$	102,042		$	115,387		$	104,813
Loans 90 days or more past due, still accruing interest	410			1,599			470
Total non-performing loans	102,452			116,986			105,283
Other real estate owned	31,356			36,977			42,427
Repossessed assets	861			773			113
Total non-performing assets	$	134,669		$	154,736		$	147,823
Total allowance for loan losses	$	118,031		$	124,204		$	121,182
Accruing restructured loans (1)	29,911			21,256			17,929
Total non-performing loans to total loans	1.83		%	2.03		%	1.87		%
Total non-performing assets to total assets	1.45			1.62			1.56
Allowance for loan losses to non-performing loans	115.21			106.17			115.10

(1) 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.

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 nonperforming) through the calendar year of the restructuring that the historical payment performance has been established.

Non-performing assets consists of non-performing loans as well as other repossessed assets and other real estate owned.  Other real estate owned represents properties acquired through foreclosure or other proceedings and is recorded at fair value less the estimated cost of disposal at the date of acquisition.  Other real estate owned is evaluated regularly to ensure that the recorded amount is supported by its current fair value.  Valuation allowances to reduce the carrying amount to fair value less estimated costs of disposal are recorded as necessary.  Gains and losses and changes in valuations on other real estate owned are included in other income.  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 the Bank obtains title, repossessed vehicles are not included in loans, but are classified as “other assets” on the consolidated balance sheets.  The typical holding period for resale of a repossessed automobile 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 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.

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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 transactions, which totaled $23.9 million and $21.4 million at September 30, 2013 and December 31, 2012, respectively, is subject to the loss-share agreements with the FDIC.  See Note 6 of the notes to our consolidated financial statements for further information.

The following table presents a summary of other real estate owned (“OREO”), excluding assets related to FDIC-assisted transactions, for the nine months ended September 30, 2013 and 2012 (in thousands):

	September 30,
	2013			2012
Beginning balance	$	36,977		$	78,452
Transfers in at fair value less estimated costs to sell	6,060			2,724
Capitalized OREO costs	53			2,304
Fair value adjustments	80			(13,919		)
Net gains on sales of OREO	977			1,264
Cash received upon disposition	(12,791		)	(28,398		)
Ending balance	$	31,356		$	42,427

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 at the dates indicated (in thousands):

	September 30, 2013		December 31, 2012
Commercial loans	$	40,500	$	27,224
Commercial loans collateralized by assignment of lease payments	4,293		6,375
Commercial real estate	49,133		66,996
Construction real estate	2,484		10,958
Total	$	96,410	$	111,553

Management believes it has established an adequate allowance for probable loan losses as appropriate under GAAP.

Allowance for Loan Losses

Management believes the allowance for loan 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 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 losses is comprised of commercial related and consumer related elements. 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 12 years. The migration data is adjusted by using average losses for an economic cycle (approximately 10 years) to develop EDFs by loan type, risk rating and maturity. EDFs are updated annually in December.

Estimated loan 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 (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. Our macroeconomic factors were developed using regression analyses to select economic indicators that have a high correlation with industry-wide charge-off rates. The correlation of over 25 indicators to charge-offs were tested (change in fed funds rate, change in personal income, durable goods orders, etc.). We annually review this data to determine that such a correlation continues to exist. We currently use the following macroeconomic indicators in our macroeconomic factor computation:

Commercial loans and lease loans:  Crude oil prices, our prior period charge-off rates and a manufacturing index.

Commercial real estate loans and construction loans:  Crude oil prices, our prior period charge-off rates and the consumer confidence index.

Using the indicators noted above, a predicted industry wide charge-off rate is calculated. The predicted charge-off percentage is then compared to the cycle average charge-off percentage used in our EDF computation discussed above, 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 $87.1 million as of September 30, 2013 and $91.7 million as of December 31, 2012. The reduction in the general loss reserve was a result in the improvement of credit quality of performing commercial related 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 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 on December 2010. As part of our compliance with these other regulations, 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 by internally applying accepted appraisal methodologies to an older appraisal. Accepted appraisal methodologies include: income capitalization approach adjusting for changes in underlying leases, adjustments related to condominium projects with units sales, adjustments for loan fundings, and “As is” compared to “As Stabilized” valuations.

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

The total commercial related specific reserves component of the allowance decreased from $13.2 million as of December 31, 2012 to $12.4 million as of September 30, 2013. 

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 and indirect vehicle loans. Migration probabilities obtained from past due roll rate analyses are applied to current balances to forecast charge-offs over a one-year time horizon. The reserves for consumer related loans totaled $18.5 million at September 30, 2013 and $19.2 million at December 31, 2012.

We consistently apply our methodology for determining the appropriateness of the allowance for loan 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 losses: historical net charge-offs as they relate to prior periods' allowance for loan 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.

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

	Three Months  Ended September 30,						Nine Months  Ended September 30,
	2013			2012			2013			2012
Balance at beginning of period	$	125,497		$	128,840		$	128,279		$	135,975
Provision for credit losses	(3,304		)	(13,000		)	(2,804		)	(9,900		)
Charge-offs:
Commercial loans	1,686			75			3,030			2,065
Commercial loans collateralized by assignment of lease payments	—			—			—			1,720
Commercial real estate	1,236			2,994			5,131			8,412
Construction real estate	26			71			855			3,951
Residential real estate	713			474			2,074			1,876
Home equity	437			1,209			2,547			3,157
Indirect vehicles	572			433			1,930			1,636
Other consumer loans	485			332			1,501			864
Total charge-offs	5,155			5,588			17,068			23,681
Recoveries:
Commercial loans	579			306			1,808			2,730
Commercial loans collateralized by assignment of lease payments	—			111			1,131			460
Commercial real estate	966			12,893			5,353			16,116
Construction real estate	420			752			827			1,458
Residential real estate	48			8			461			230
Home equity	228			303			442			423
Indirect vehicles	372			224			1,111			835
Other consumer loans	74			77			185			280
Total recoveries	2,687			14,674			11,318			22,532
Net charge-offs	2,468			(9,086		)	5,750			1,149
Allowance for credit losses	119,725			124,926			119,725			124,926
Allowance for unfunded credit commitments	(1,694		)	(3,744		)	(1,694		)	(3,744		)
Allowance for loan losses	$	118,031		$	121,182		$	118,031		$	121,182
Total loans	$	5,586,732		$	5,624,845		$	5,586,732		$	5,624,845
Ratio of allowance to total loans	2.11		%	2.15		%	2.11		%	2.15		%
Ratio of net charge-offs to average loans	0.18			(0.64		)	0.14			0.03

Net charge-offs of $5.8 million were recorded in the nine months ended September 30, 2013 compared to net charge-offs of $1.1 million in the nine months ended September 30, 2012. The negative provision for credit losses was $2.8 million for the nine months ended September 30, 2013 compared to a negative provision of $9.9 million for the nine months ended September 30, 2012.

Additions to the allowance for loan 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 losses. The regulators may require us to record adjustments to the allowance level based upon their assessment of the information available to them at the time of examination. Although management believes the allowance for loan 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-

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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 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 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 losses at the time of their examination.

Although management believes that adequate 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.

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.  Lessees tend to have an investment grade public debt rating by Moody’s or Standard & Poors or the equivalent, though we also provide credit to below investment grade and non-rated companies.

Lease investments by categories follow (in thousands):

	September 30, 2013			December 31, 2012			September 30, 2012
Direct finance leases:
Minimum lease payments	$	133,438		$	90,160		$	49,395
Estimated unguaranteed residual values	12,660			11,140			5,919
Less: unearned income	(11,270		)	(7,135		)	(4,538		)
Direct finance leases (1)	$	134,828		$	94,165		$	50,776
Leveraged leases:
Minimum lease payments	$	151,541		$	154,549		$	27,072
Estimated unguaranteed residual values	21,428			23,586			2,606
Less: unearned income	(4,981		)	(2,879		)	(2,397		)
Less: related non-recourse debt	(143,759		)	(145,719		)	(25,655		)
Leveraged leases (1)	$	24,229		$	29,537		$	1,626
Operating leases:
Equipment, at cost	$	202,879		$	222,083		$	206,798
Less accumulated depreciation	(90,388		)	(92,260		)	(93,618		)
Lease investments, net	$	112,491		$	129,823		$	113,180

(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 to the lessee are classified as direct financing.  If these direct finance leases have non-recourse debt associated with them, they are further classified as leveraged leases, and the associated debt is netted with the outstanding balance in the consolidated financial statements.  Interest

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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 $17.7 million at September 30, 2013 and $21.1 million at December 31, 2012.

At September 30, 2013, 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
2013	$	2,210	$	3,096	$	3,539	$	8,845
2014	3,501		6,165		10,864		20,530
2015	2,596		5,730		8,242		16,568
2016	2,485		4,022		8,349		14,856
2017	921		1,620		6,285		8,826
Thereafter	947		795		2,659		4,401
	$	12,660	$	21,428	$	39,938	$	74,026

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 reviewed quarterly, and any write-downs or charge-offs deemed necessary are recorded in the period in which they become known. Gains on leased equipment periodically result when a lessee renews a lease or purchases the equipment at the end of a lease or the equipment is sold to a third party at a profit.  Individual lease transactions can, however, result in a loss.  This generally happens when, at the end of a lease, the lessee does not renew the lease or purchase the equipment.  To mitigate this risk of loss, we usually limit individual leased equipment residuals to approximately $500 thousand per transaction and seek to diversify both the type of equipment leased and the industries in which the lessees participate.  Often, there are several individual lease schedules under one master lease.  There were 3,560 leases at September 30, 2013 compared to 3,464 at December 31, 2012.  The average residual value per lease schedule was approximately $21 thousand at September 30, 2013 and $22 thousand at December 31, 2012.  The average residual value per master lease schedule was approximately $80 thousand at September 30, 2013 and $79 thousand at December 31, 2012, 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 $126.3 million for the nine months ended September 30, 2013 compared to net cash flows provided by operating activities of $112.5 million for the nine months ended September 30, 2012. The change is due to the increase in earnings for the nine months ended September 30, 2013.

Cash used in 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 ended September 30, 2013, the Company had net cash flows provided by investing activities of $139.0 million compared to net cash flows provided by investing activities of $554.3 million for the nine months ended September 30, 2012.  The change was primarily due to more purchases of investment securities and a smaller decrease in loans as well as lower proceeds from FDIC related covered assets.

Cash flows from financing activities include transactions and events whereby cash is obtained from depositors, creditors or investors.  For the nine months ended September 30, 2013, the Company had net cash flows used in financing activities of $296.2 million compared to net cash flows used in financing activities of $454.7 million for the nine months ended September

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30, 2012.  The change in cash flows from financing activities was primarily due to the repurchase of preferred shares in the first quarter of 2012 and repayment of borrowings.

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, 2013, there were no firm lending commitments in place, management believes that we could borrow approximately $280 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, 2013, the Company had $4.3 million outstanding in FHLB advances, and could borrow an additional amount of approximately $517 million.  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, 2013, the Company had approximately $1.2 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. In addition, the Company has a $35.0 million unsecured line of credit with a correspondent bank. As of September 30, 2013, no amount was outstanding. The holding company had $94.5 million in cash as of September 30, 2013.

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, 2013 as compared to December 31, 2012.

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.  Additionally, our current internal policy effectively limits the amount of dividends our subsidiary bank may pay to us by requiring the bank to maintain total risk-based capital, Tier 1 risk-based capital and Tier 1 leverage capital ratios of 12%, 9% and 8%, respectively.  The minimum ratios required for a bank to be considered “well capitalized” for regulatory purposes are 10%, 6% and 5%, respectively.  In addition to adhering to our policy, there are regulatory restrictions on the ability of national banks to pay dividends.  See “Item 1. Business — Supervision and Regulation” in our Annual Report on Form 10-K for the year ended December 31, 2012.

At September 30, 2013, the Company’s total risk-based capital ratio was 16.70%, Tier 1 capital to risk-weighted assets ratio was 15.44% and Tier 1 capital to average asset ratio was 11.39%. MB Financial Bank’s total risk-based capital ratio was 15.15%, Tier 1 capital to risk-weighted assets ratio was 13.90% and Tier 1 capital to average asset ratio was 10.24%. MB Financial Bank was categorized as “Well-Capitalized” at September 30, 2013 under the regulations of the Office of the Comptroller of the Currency.

In July 2013, the Federal banking regulators approved a final rule to implement the revised capital adequacy standards of the Basel Committee on Banking Supervision, commonly called Basel III, and to address relevant provisions of the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Dodd-Frank Act”). The final rule strengthens the definition of regulatory capital, increases risk-based capital requirements, makes selected changes to the calculation of risk-weighted assets, and adjusts the prompt corrective action thresholds. The Company and MB Financial Bank will become subject to the new rule on January 1, 2015 and certain provisions of the new rule will be phased in over the period of 2015 through 2019.

The final rule:

• Permits banking organizations that had less than $15 billion in total consolidated assets as of December 31, 2009, to include in Tier 1 capital trust preferred securities and cumulative perpetual preferred stock that were issued and included in Tier 1 capital prior to May 19, 2010, subject to a limit of 25% of Tier 1 capital elements, excluding any non-qualifying capital instruments and after all regulatory capital deductions and adjustments have been applied to Tier 1 capital.

• Establishes new qualifying criteria for regulatory capital, including new limitations on the inclusion of deferred tax assets and mortgage servicing rights.

• Requires a minimum ratio of common equity Tier 1 capital to risk-weighted assets of 4.5%.

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• Increases the minimum Tier 1 capital to risk-weighted assets ratio requirement from 4% to 6%.

• Retains the minimum total capital to risk-weighted assets ratio requirement of 8%.

• Establishes a minimum leverage ratio requirement of 4%.

• Retains the existing regulatory capital framework for 1-4 family residential mortgage exposures.

• Implements a new capital conservation buffer requirement for a banking organization to maintain a common equity capital ratio more than 2.5% above the minimum common equity Tier 1 capital, Tier 1 capital and total risk-based capital ratios in order to avoid limitations on capital distributions, including dividend payments, and certain discretionary bonus payments. The capital conservation buffer requirement will be phased in beginning on January 1, 2016 at 0.625% and will be fully phased in at 2.50% by January 1, 2019. A banking organization with a buffer of less than the required amount would be subject to increasingly stringent limitations on such distributions and payments as the buffer approaches zero. The new rule also generally prohibits a banking organization from making such distributions or payments during any quarter if its eligible retained income is negative and its capital conservation buffer ratio was 2.5% or less at the end of the previous quarter. The eligible retained income of a banking organization is defined as its net income for the four calendar quarters preceding the current calendar quarter, based on the organization's quarterly regulatory reports, net of any distributions and associated tax effects not already reflected in net income.

• Increases capital requirements for past-due loans, high volatility commercial real estate exposures, and certain short-term commitments and securitization exposures.

• Expands the recognition of collateral and guarantors in determining risk-weighted assets.

• Removes references to credit ratings consistent with the Dodd Frank Act and establishes due diligence requirements for securitization exposures.

The Company's management is currently evaluating the provisions of the final rule and their expected impact on the Company.

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 and net interest margin on a fully tax equivalent basis. 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. 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 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

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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 pending MB Financial-Taylor Capital merger and our other merger and acquisition activities might not be realized within the anticipated time frames or at all, and costs or difficulties relating to integration matters, including but not limited to customer and employee retention, might be greater than expected; (2) requisite stockholder and regulatory approvals for the MB Financial-Taylor Capital merger might not be obtained; (3) the possibility that the expected benefits of the FDIC-assisted and other transactions we previously completed will not be realized; (4) the credit risks of lending activities, including changes in the level and direction of loan delinquencies and write-offs and changes in estimates of the adequacy of the allowance for loan losses, which could necessitate additional provisions for loan losses, resulting both from loans we originate and loans we acquire from other financial institutions; (5) results of examinations by the Office of Comptroller of Currency, the Federal Reserve Board and other regulatory authorities, including the possibility that any such regulatory authority may, among other things, require us to increase our allowance for loan losses or write-down assets; (6) competitive pressures among depository institutions; (7) interest rate movements and their impact on customer behavior and net interest margin; (8) the impact of repricing and competitors’ pricing initiatives on loan and deposit products; (9) fluctuations in real estate values; (10) the ability to adapt successfully to technological changes to meet customers’ needs and developments in the market-place; (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 Act and regulations adopted thereunder, changes in capital requirements pursuant to the Dodd-Frank Act and the implementation of the Basel III capital standards, 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 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.

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.

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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, 2013 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, 2013 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.

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Therefore, the information in the table is calculated assuming that NOW, money market and savings deposits will reprice as follows: 4%, 10%, and 5%, respectively, in the first three months, 12%, 26%, and 15%, respectively, in the next nine months, 51%, 58%, and 58%, 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	$	40,533		$	697		$	470		$	—		$	41,700
Federal funds sold	47,500			—			—			—			47,500
Investment securities	184,266			236,153			1,255,446			658,672			2,334,537
Loans held for sale	1,120			—			—			—			1,120
Loans, including covered loans	2,345,712			1,150,942			2,010,861			79,217			5,586,732
Total interest earning assets	$	2,619,131		$	1,387,792		$	3,266,777		$	737,889		$	8,011,589
Interest Bearing Liabilities:
NOW and money market deposit accounts	$	205,223		$	554,222		$	1,486,289		$	434,393		$	2,680,127
Savings deposits	46,215			130,279			479,166			188,011			843,671
Time deposits	349,155			704,575			396,892			54,899			1,505,521
Short-term borrowings	24,060			62,556			139,548			14,436			240,600
Long-term borrowings	2,525			6,638			50,845			2,420			62,428
Junior subordinated notes issued to capital trusts	152,065			—			—			—			152,065
Total interest bearing liabilities	$	779,243		$	1,458,270		$	2,552,740		$	694,159		$	5,484,412
Rate sensitive assets (RSA)	$	2,619,131		$	4,006,923		$	7,273,700		$	8,011,589		$	8,011,589
Rate sensitive liabilities (RSL)	779,243			2,237,513			4,790,253			5,484,412			5,484,412
Cumulative GAP (GAP=RSA-RSL)	1,839,888			1,769,410			2,483,447			2,527,177			2,527,177
RSA/Total assets	28.29		%	43.28		%	78.57		%	86.54		%	86.54		%
RSL/Total assets	8.42			24.17			51.74			59.24			59.24
GAP/Total assets	19.87			19.11			26.83			27.30			27.30
GAP/RSA	70.25			44.16			34.14			31.54			31.54

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.

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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 Once Year Horizon
Changes in	September 30, 2013					December 31, 2012
Levels of	Dollar			Percentage		Dollar			Percentage
Interest Rates	Change			Change		Change			Change
+ 2.00%	$	8,789		3.22	%	$	7,932		2.72	%
+ 1.00%	4,709			1.73		4,174			1.43
- 1.00%	(5,568		)	(2.07	)	(3,915		)	(1.34	)

In the interest rate sensitivity table above, changes in net interest income between September 30, 2013 and December 31, 2012 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 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 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, 2013 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, 2013, 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, 2013, 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

On July 26, 2013, a class action complaint, captioned James Sullivan v. Taylor Capital Group, Inc., et al., was filed under Case No. 2013-CH-17751 in the Circuit Court of Cook County, Illinois, against Taylor Capital, its directors and MB Financial challenging the pending MB Financial/Taylor Capital merger. On August 8, 2013, a second class action complaint, captioned Dennis Panozzo v Taylor Capital Group, Inc., et. al., was filed under Case No. 2013-CH-18546 in the Circuit Court of Cook County, Illinois, against these same defendants. Subsequently, the two cases were consolidated pursuant to court order under the first-filed Sullivan case number. A consolidated amended complaint was filed on October 24, 2013. The lawsuits allege, among other things, that the Taylor Capital directors breached their fiduciary duties to Taylor Capital and its stockholders by agreeing to the proposed merger at an unfair price pursuant to a flawed sales process, by agreeing to terms with MB Financial that discouraged other bidders and by not providing material information necessary for Taylor Capital stockholders to make an informed vote on the transaction. Plaintiffs further allege that certain Taylor Capital directors and officers were not independent or disinterested with respect to the merger. Plaintiffs also allege that MB Financial aided and abetted the Taylor Capital directors’ breaches of fiduciary duties. The complaints seek, among other things, an order enjoining the defendants from consummating the merger, as well as attorneys’ and experts’ fees and certain other damages. MB Financial believes that the actions against it are without merit and intends to vigorously defend itself against such actions.

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, 2012, except for the following:

The success of our pending acquisition of Taylor Capital is dependent on uncertain factors.

The success of our pending acquisition of Taylor Capital, whereby Taylor Capital would be merged with MB Financial, Inc. and Taylor Capital's subsidiary bank, Cole Taylor Bank, would be merged with MB Financial Bank, is subject to a number of uncertain factors, including, but not limited to:

• obtaining the requisite regulatory approvals in order to consummate the transactions. MB Financial and Taylor Capital must obtain approvals from the Federal Reserve Board and the Office of the Comptroller of the Currency. Other approvals, waivers or consents from regulators may also be required. An adverse development in either party’s regulatory standing or other factors could result in an inability to obtain approval or delay their receipt. These regulators may impose conditions on the completion of the transactions. It is a condition to each company’s obligation to complete the merger that the requisite regulatory approvals be obtained without the imposition of any condition or restriction that would reasonably be expected to have a material adverse effect on, or materially and adversely affect the economic benefits to be realized by MB Financial (as the surviving corporation of the merger) and its subsidiaries, taken as a whole, after giving effect to the merger;

• obtaining the requisite stockholder approvals from the MB Financial and Taylor Capital stockholders;

• our ability to realize expected revenues, cost savings, synergies and other benefits from the acquisition within the expected time frames or at all, and costs or difficulties relating to integration matters, including but not limited to customer and employee retention, might be greater than expected; and

• the credit quality of loans and other assets acquired from Taylor Capital.

MB Financial and Taylor Capital have operated and, until the completion of the acquisition, will continue to operate, independently. The success of the acquisition, including anticipated benefits and cost savings, will depend, in part, on MB Financial’s ability to successfully combine the businesses of MB Financial and Taylor Capital. To realize these anticipated benefits and cost savings, after the completion of the acquisition, MB Financial expects to integrate Taylor Capital’s business into its own. It is possible that the integration process could result in the loss of key employees, the disruption of each company’s ongoing businesses or inconsistencies in standards, controls, procedures and policies that adversely affect the combined company’s ability to maintain relationships with clients, customers, depositors and employees or to achieve the anticipated benefits and cost savings of the merger. The loss of key employees could adversely affect MB Financial’s ability to successfully conduct its business in the markets in which Taylor Capital now operates, which could have an adverse effect on MB Financial’s financial results and the value of its

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common stock. If MB Financial experiences difficulties with the integration process, the anticipated benefits of the acquisition may not be realized fully or at all, or may take longer to realize than expected. As with any merger of financial institutions, there also may be business disruptions that cause MB Financial and/or Taylor Capital to lose customers or cause customers to close their accounts with MB Financial and/or Taylor Capital and move their business to competing financial institutions. Integration efforts between the two companies will also divert management attention and resources.

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

The following table sets forth information for the three months ended September 30, 2013 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	Maximum Number of Shares that May Yet Be Purchased Under the Plans or Programs
July 1, 2013 — July 30, 2013	52,124	$	29.17	—	1,000,000
August 1, 2013 — August 31, 2013	333	27.43		—	1,000,000
September 1, 2013 — September 30, 2013	14,570	27.43		—	1,000,000
Total	67,027	$	28.78	—

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

In the fourth quarter of 2012, the Company's Board of Directors authorized the Company to purchase up to one million shares of common stock from time to time over the next two years, subject to market conditions and other factors.

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:	October 30, 2013	By:	/s/Mitchell Feiger
			Mitchell Feiger
			President and Chief Executive Officer
			(Principal Executive Officer)
Date:	October 30, 2013	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	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))
2.3	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))
2.4	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))
2.5	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 June 30, 2011 (File No. 0-24566-01))
3.1A	Articles Supplementary to the Charter of the Registrant for the Registrant’s Fixed Rate Cumulative Perpetual Preferred Stock, Series A (incorporated herein by reference to Exhibit 3.1 to the Registrant’s Current Report on Form 8-K filed on December 8, 2008 (File No.0-24566-01))
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 April 2, 2012 (File No. 0-24566-01))
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
4.2	Certificate of Registrant’s Common Stock (incorporated herein by reference to Exhibit 4.1 to Amendment No. One to the Registrant’s Registration Statement on Form S-4 (No. 333-64584))
4.3	Warrant to purchase shares of the Registrant’s Common Stock (incorporated herein by reference to Exhibit 4.1 to the Registrant’s Current Report on Form 8-K filed on December 8, 2008 (File No.0-24566-01))
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))

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EXHIBIT INDEX
Exhibit Number	Description
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))
10.3	Employment Agreement between MB Financial Bank, N.A. and Burton J. Field (incorporated herein by reference to Exhibit 10.3 to the Registrant’s Quarterly Report on Form 10-Q for the quarter ended September 30, 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 Burton Field, 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))
10.5	Form of Letter Agreement dated December 4, 2008 between MB Financial, Inc. and each of Mitchell Feiger, Jill E. York, Burton Field, 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. Second 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 27, 2011 (File No. 0-24566-01))
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 Old MB Financial’s (then known as Avondale Financial Corp.) Annual Report on Form 10-K for the year ended December 31, 1996 (File No. 0-24566))

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EXHIBIT INDEX
Exhibit Number	Description
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, Burton J. Field, 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, Burton J. Field, 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))
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))

78

EXHIBIT INDEX
Exhibit Number	Description
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, Jill E. York and Burton J. Field (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	Reserved.
10.24	Reserved.
10.25	Reserved.
10.26	Reserved.
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)

79

EXHIBIT INDEX
Exhibit Number	Description
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))
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, 2013, 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

80

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:  October 30, 2013

/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:  October 30, 2013

/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, 2013 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:	October 30, 2013	/s/Mitchell Feiger
		Mitchell Feiger
		President and Chief Executive Officer
Date:	October 30, 2013	/s/Jill E. York
		Jill E. York
		Vice President and Chief Financial Officer

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Short-Term Borrowings

9 Months Ended

Sep. 30, 2013

Short-term Debt [Abstract]

Short-Term Borrowings

Short-Term Borrowings

Short-term borrowings were as follows as of September 30, 2013 and December 31, 2012 (dollars in thousands):

	September 30, 2013				December 31, 2012
	Weighted Average				Weighted Average
	Cost		Amount		Cost		Amount
Customer repurchase agreements	0.22	%	$	240,600	0.23	%	$	208,242
Federal Home Loan Bank advances	—	%	—		3.58	%	12,360
	0.22	%	$	240,600	0.42	%	$	220,602

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 had a Federal Home Loan Bank fixed rate advance with a maturity date less than one year of $12.4 million in fixed rate advances at December 31, 2012. 

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 + 2.00%. As of September 30, 2013, no amount was outstanding. The line originally matured on March 8, 2013, was renewed and is scheduled to mature on March 7, 2014.

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Short-Term Borrowings (Details) (USD $)							9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013 Customer repurchase agreements	Dec. 31, 2012 Customer repurchase agreements	Sep. 30, 2013 Federal Home Loan Bank advances	Dec. 31, 2012 Federal Home Loan Bank advances	Sep. 30, 2013 Line of credit	Sep. 30, 2013 Libor [Member] Line of credit
Short-term borrowings
Weighted Average Cost	0.22%	0.42%	0.22%	0.23%	0.00%	3.58%
Amount	$ 240,600,000	$ 220,602,000	$ 240,600,000	$ 208,242,000	$ 0	$ 12,360,000
Fixed interest rate Federal Home Loan Bank advances		12,400,000
Unsecured Line of Credit							$ 35,000,000
Description of interest rate basis							one month LIBOR
Debt Instrument, Basis Spread on Variable Rate								2.00%

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CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Interest income:
Loans	$ 60,115	$ 67,482	$ 180,489	$ 208,380
Investment securities:
Taxable	6,330	7,287	18,749	27,053
Nontaxable	8,175	7,582	24,399	21,624
Federal funds sold	7	0	9	0
Other interest earning accounts	193	312	420	639
Total interest income	74,820	82,663	224,066	257,696
Interest expense:
Deposits	4,433	7,374	15,274	24,192
Short-term borrowings	112	342	395	910
Long-term borrowings and junior subordinated notes	1,367	2,872	4,324	9,322
Total interest expense	5,912	10,588	19,993	34,424
Net interest income	68,908	72,075	204,073	223,272
Provision for credit losses	(3,304)	(13,000)	(2,804)	(9,900)
Net interest income after provision for credit losses	72,212	85,075	206,877	233,172
Non-interest income:
Capital markets and international banking fees	972	1,400	2,719	2,700
Commercial deposit and treasury management fees	6,327	5,860	18,322	17,541
Lease financing, net	14,070	9,671	45,435	23,963
Trust and asset management fees	4,799	4,428	14,167	13,367
Card fees	2,745	2,388	8,175	6,863
Loan service fees	1,427	1,075	4,349	3,409
Consumer and other deposit service fees	3,648	3,786	10,487	10,773
Brokerage fees	1,289	1,185	3,680	3,704
Net gain on investment securities	1	281	14	244
Increase in cash surrender value of life insurance	851	890	2,537	2,677
Net loss on sale of assets	0	(12)	0	(37)
Accretion of FDIC indemnification asset	64	204	307	901
Net (loss) gain recognized on other real estate owned	(791)	(3,938)	894	(15,968)
Net gain on sale of loans	177	575	1,322	1,503
Other operating income	1,337	760	3,835	3,674
Total non-interest income	36,916	28,553	116,243	75,314
Non-interest expenses:
Salaries and employee benefits	44,918	42,083	132,341	122,658
Occupancy and equipment expense	8,797	8,274	27,609	27,032
Computer services and telecommunication expense	4,870	3,777	13,374	11,339
Advertising and marketing expense	1,917	1,936	6,187	5,848
Professional and legal expense	3,102	1,554	5,750	4,470
Other intangibles amortization expense	1,513	1,251	4,595	3,759
Branch impairment charges	0	758	0	758
Other real estate expense, net	240	874	572	2,541
Prepayment fees on interest bearing liabilities	0	12,682	0	12,682
Other operating expenses	10,117	7,976	28,413	24,243
Total non-interest expenses	75,474	81,165	218,841	215,330
Income before income taxes	33,654	32,463	104,279	93,156
Income tax expense	9,254	9,330	29,680	26,794
Net income	24,400	23,133	74,599	66,362
Dividends and discount accretion on preferred shares	0	0	0	3,269
Net income available to common stockholders	$ 24,400	$ 23,133	$ 74,599	$ 63,093
Common share data:
Basic earnings per common share	$ 0.45	$ 0.43	$ 1.37	$ 1.16
Diluted earnings per common share	$ 0.44	$ 0.42	$ 1.36	$ 1.16
Weighted average common shares outstanding for basic earnings per common share	54,565,089	54,346,827	54,471,541	54,226,241
Diluted weighted average common shares outstanding for diluted earnings per common share	55,130,653	54,556,517	54,912,352	54,472,617

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New Authoritative Accounting Guidance (Notes)

9 Months Ended

Sep. 30, 2013

New Authoritative Accounting Guidance [Abstract]

New Authoritative Accounting Guidance

New Authoritative Accounting Guidance

ASC Topic 805 “Business Combinations.” New authoritative accounting guidance under ASC Topic 805, “Business Combinations” amended prior guidance on the subsequent accounting for an indemnification asset recognized at the acquisition date as a result of a government-assisted (Federal Deposit Insurance Corporation) acquisition of a financial institution that includes a loss-sharing agreement. The new authoritative guidance requires that at each subsequent reporting date, an acquirer measure an indemnification asset on the same basis as the indemnified liability or asset, subject to any contractual limitations on its amount, and, for an indemnification asset that is not subsequently measured at fair value, management's assessment of the collectability of the indemnification asset. Any amortization of changes in value should be limited to the contractual term of the indemnification agreement (that is, the lesser of the term of the indemnification agreement and the remaining life of the indemnified assets). The Company adopted this new authoritative guidance on January 1, 2013, and it did not have an impact on the Company's statements of operations and financial condition.

ASC Topic 210 “Disclosures about Offsetting Assets and Liabilities.” New authoritative accounting guidance under ASC Topic 210, “Disclosures about Offsetting Assets and Liabilities” amended prior guidance to require an entity to disclose both gross and net information about both instruments and transactions eligible for offset in the statement of financial position and instruments and transactions subject to an agreement similar to a master netting arrangement. The instruments and transactions would include derivatives, sale and repurchase agreements and reverse sale and repurchase agreements, and securities borrowing and securities lending arrangements. This new authoritative guidance was further amended to clarify the scope of offsetting disclosures. The Company adopted the new authoritative guidance on January 1, 2013, and it did not have an impact on the Company's statements of operations and financial condition. See disclosures in Note 15.

ASC Topic 220 “Comprehensive Income.” New authoritative accounting guidance under ASC Topic 220, “Comprehensive Income” amended prior guidance to improve the reporting of reclassifications out of accumulated other comprehensive income by requiring an entity to provide information about the amounts reclassified out of accumulated other comprehensive income by component. In addition, an entity is required to present, either on the face of the statement or in the notes, significant amounts reclassified out of accumulated other comprehensive income by the respective line items of net income if the amount reclassified is required under U.S. GAAP. The Company adopted this new authoritative guidance on January 1, 2013, and it did not have an impact on the Company's statements of operations and financial condition.

ASC Topic 815 “Derivatives and Hedging.” New authoritative accounting guidance under ASC Topic 815, “Derivatives and Hedging” amended prior guidance to permit the Fed Funds Effective Swap Rate (OIS) to be used as a U.S. benchmark interest rate for hedge accounting purposes, in addition to U.S. government treasury obligation rates and London Interbank Offered Rate swap rate. The amendments also remove the restriction on using different benchmark rates for similar hedges. The new authoritative guidance will be effective prospectively for new and redesignated hedging relationships entered into on or after July 17, 2013 and is not expected to have an impact on the Company's statements of operations and financial condition.

ASC Topic 740 “Income Taxes.” New authoritative accounting guidance under ASC Topic 740, “Income Taxes” amended prior guidance to include explicit guidance on the financial statement presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. An unrecognized tax benefit, or a portion of an unrecognized tax benefit, should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, except as follows. To the extent a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional income taxes that would result from the disallowance of a tax position or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. The new authoritative guidance will be for reporting periods after January 1, 2014 and is not expected to have an impact on the Company's statements of operations and financial condition.

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Common and Preferred Stock

9 Months Ended

Sep. 30, 2013

Equity [Abstract]

Common and Preferred Stock

Common and Preferred Stock

In 2008, the Company issued 196,000 shares of Fixed Rate Cumulative Perpetual Preferred Stock, Series A ("the Series A Preferred Stock"), liquidation amount $1,000 per share, for an aggregate purchase price of $196.0 million as part of the Troubled Asset Relief Program (“TARP”) Capital Purchase Program of the United States Department of the Treasury (the “Treasury”).  The Series A Preferred Stock qualified as Tier 1 capital and provided for cumulative dividends on the liquidation preference amount on a quarterly basis at a rate of 5% per annum for the first five years, and 9% per annum thereafter.  Concurrent with issuing the Series A Preferred Stock, the Company issued to the Treasury a 10 year warrant (the “Warrant”) to purchase 1,012,048 shares (subsequently reduced to 506,024 shares, as described below) of the Company’s Common Stock at an exercise price of $29.05 per share.

On September 17, 2009, the Company completed a public offering of its common stock by issuing 12,578,125 shares of common stock for aggregate gross proceeds of $201.3 million.  The net proceeds to the Company after deducting underwriting discounts and commissions and offering expenses were approximately $190.9 million.  With the proceeds from this offering and the proceeds received by the Company from issuances pursuant to its Dividend Reinvestment and Stock Purchase Plan, the Company received aggregate gross proceeds from “Qualified Equity Offerings” in excess of the $196.0 million aggregate liquidation preference amount of the Series A Preferred Stock.  As a result, the number of shares of the Company’s common stock underlying the Warrant was reduced by 50%, from 1,012,048 shares to 506,024 shares.

On March 14, 2012, the Company repurchased all $196.0 million of the Series A Preferred Stock. On May 2, 2012, the Company repurchased the Warrant in full for approximately $1.5 million.

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Common and Preferred Stock (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended		1 Months Ended	9 Months Ended	12 Months Ended	1 Months Ended	9 Months Ended
	May 02, 2012	Mar. 14, 2012	Sep. 30, 2009	Sep. 30, 2013 Series A Preferred Stock	Dec. 31, 2008 Series A Preferred Stock	Sep. 30, 2009 Common Stock	Sep. 30, 2013 Common Stock	Sep. 17, 2009 Common Stock	Dec. 31, 2008 Common Stock
Common and preferred stock
Preferred Stock, Shares Issued					196,000
Share Price					$ 1,000
Series A Preferred Stock, cumulative dividends rate for the first five years (as a percent)				5.00%
Series A Preferred Stock, cumulative dividends rate after five years (as a percent)				9.00%
Warrants, term (in years)							10 years
Warrants to purchase the Company's common stock, initially authorized (in shares)								1,012,048
Warrants to purchase the Company's common stock, as adjusted (in shares)								506,024
Warrants, exercise price (in dollars per share)									29.05
Common stock issued (in shares)						12,578,125
Gross proceeds from public offering of common stock						$ 201.3
Proceeds from public offering of common stock, net of underwriting discounts, commissions and offering expenses						190.9
Aggregate gross proceeds from "Qualified Equity Offerings"			196.0		196.0
Percentage of reduction in number of common shares to be purchased under the warrant								50.00%
Payments for repurchase of preferred stock and preference stock		196.0
Payments for repurchase of warrants	$ 1.5

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Junior Subordinated Notes Issued to Capital Trusts (Details 2) (Trust preferred securities issued by each trust, USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 30, 2013
Coal City Capital Trust I
Trust preferred securities issued by each trust
Debt Instrument, Basis Spread on Variable Rate	1.80%
Description of annual interest rate basis	3-mo LIBOR
Face Value	$ 25,000
MB Financial Capital Trust II
Trust preferred securities issued by each trust
Debt Instrument, Basis Spread on Variable Rate	1.40%
Description of annual interest rate basis	3-mo LIBOR
Face Value	35,000
MB Financial Capital Trust III
Trust preferred securities issued by each trust
Debt Instrument, Basis Spread on Variable Rate	1.50%
Description of annual interest rate basis	3-mo LIBOR
Face Value	10,000
MB Financial Capital Trust IV
Trust preferred securities issued by each trust
Debt Instrument, Basis Spread on Variable Rate	1.52%
Description of annual interest rate basis	3-mo LIBOR
Face Value	20,000
MB Financial Capital Trust V
Trust preferred securities issued by each trust
Debt Instrument, Basis Spread on Variable Rate	1.30%
Description of annual interest rate basis	3-mo LIBOR
Face Value	30,000
MB Financial Capital Trust VI
Trust preferred securities issued by each trust
Debt Instrument, Basis Spread on Variable Rate	1.30%
Description of annual interest rate basis	3-mo LIBOR
Face Value	22,500
FOBB Statutory Trust III
Trust preferred securities issued by each trust
Debt Instrument, Basis Spread on Variable Rate	2.80%
Description of annual interest rate basis	3-mo LIBOR
Face Value	$ 5,000

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Long-term Borrowings

9 Months Ended

Sep. 30, 2013

Long-term Debt, Unclassified [Abstract]

Long-term Borrowings

Long-term Borrowings

The Company had Federal Home Loan Bank advances with remaining contractual maturities greater than one year of $4.3 million at September 30, 2013 and December 31, 2012. As of September 30, 2013, 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.

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.  The Company may also pledge certain investment securities as collateral for advances based on market value.  As of September 30, 2013 and December 31, 2012, the Company had $7.3 million and $28.4 million, respectively, of loans pledged as collateral for long-term Federal Home Loan Bank advances.  Additionally, as of September 30, 2013 and December 31, 2012, the Company had $29.2 million and $32.1 million, respectively, of investment securities pledged as collateral for advances from the Federal Home Loan Bank.

The Company had notes payable to banks totaling $17.7 million and $21.1 million at September 30, 2013 and December 31, 2012, respectively, which as of September 30, 2013, were accruing interest at rates ranging from 2.50% to 12.00%.  Lease investments includes equipment with an amortized cost of $25.9 million and $29.7 million at September 30, 2013 and December 31, 2012, respectively, that is pledged as collateral on these notes.

The Company had a $40.0 million10-year structured repurchase agreement as of September 30, 2013, which bears interest at a fixed rate borrowing of 4.75% and expires in 2016.

During the first quarter of 2013, MB Financial Bank pre-paid a $50.0 million subordinated debt facility.  Interest was payable at a rate of 3-month LIBOR +1.70%.

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Loans (Details 6) (USD $)	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012		Dec. 31, 2012
Allowance for credit losses [Roll Forward]
Beginning Balance					$ 124,204,000
Transfer to (from) allowance for unfunded credit commitments	0				(500,000)		(1,132,000)
Allowance for unfunded credit commitments, ending balance	1,694,000		3,744,000		1,694,000		3,744,000
Allowance for credit losses, ending balance	119,725,000		124,926,000		119,725,000		124,926,000
Ending Balance	118,031,000				118,031,000
Ending allowance balance attributable to loans:
Acquired and accounted for under ASC 310-30	2,857,000		2,546,000		2,857,000		2,546,000
Loans:
Individually evaluated for impairment	123,623,000		102,769,000		123,623,000		102,769,000
Collectively evaluated for impairment	5,171,109,000		5,003,052,000		5,171,109,000		5,003,052,000
Acquired and accounted for under ASC 310-30	292,000,000		519,024,000		292,000,000		519,024,000
Unfunded Commitments
Allowance for unfunded credit commitments, beginning balance	1,812,000		7,084,000		4,075,000		9,177,000
Transfer to (from) allowance for unfunded credit commitments	0				(500,000)		(1,132,000)
Allowance for unfunded commitments, Provision	(118,000)		(3,340,000)		(1,881,000)		(4,301,000)
Unfunded commitments collectively evaluated for impairment	1,037,000		2,018,000		1,037,000		2,018,000
Individually evaluated for impairment for unfunded commitments	657,000		1,726,000		657,000		1,726,000
Allowance for unfunded credit commitments, ending balance	1,694,000		3,744,000		1,694,000		3,744,000
Allowance for credit losses
Allowance for loan losses and unfunded commitments charge offs	5,155,000		5,588,000		17,068,000		23,681,000
Allowance for loan losses and unfunded commitments recoveries	2,687,000		14,674,000		11,318,000		22,532,000
Allowance for loan losses and unfunded commitments provision	(3,304,000)		(13,000,000)		(2,804,000)		(9,900,000)
Allowance for credit losses, beginning balance	125,497,000		128,840,000		128,279,000		135,975,000
Allowance for credit losses, ending balance	119,725,000		124,926,000		119,725,000		124,926,000
Allowance for credit losses, individually evaluated for impairment	16,849,000		13,026,000		16,849,000		13,026,000
Allowance for credit losses, collectively evaluated for impairment	100,019,000		109,354,000		100,019,000		109,354,000
Total loans	5,586,732,000		5,624,845,000		5,586,732,000		5,624,845,000		5,766,930,000
Commercial loans
Allowance for credit losses [Roll Forward]
Beginning Balance	27,277,000		20,789,000		24,943,000		21,106,000
Transfer to (from) allowance for unfunded credit commitments
Charge-offs	1,686,000		75,000		3,030,000		2,065,000
Provision	(45,000)		1,181,000		2,404,000		430,000
Ending Balance	26,125,000		22,201,000		26,125,000		22,201,000
Ending allowance balance attributable to loans:
Individually evaluated for impairment	4,389,000		2,570,000		4,389,000		2,570,000
Collectively evaluated for impairment	20,871,000		19,345,000		20,871,000		19,345,000
Acquired and accounted for under ASC 310-30	865,000	[1]	286,000		865,000	[1]	286,000
Loans:
Individually evaluated for impairment	19,836,000		21,537,000		19,836,000		21,537,000
Collectively evaluated for impairment	1,134,376,000		1,033,534,000		1,134,376,000		1,033,534,000
Acquired and accounted for under ASC 310-30	35,649,000	[1]	78,275,000	[1]	35,649,000	[1]	78,275,000	[1]
Unfunded Commitments
Transfer to (from) allowance for unfunded credit commitments
Allowance for credit losses
Financing receivable, allowance for credit losses, recovery	579,000		306,000		1,808,000		2,730,000
Total loans	1,189,861,000		1,133,346,000		1,189,861,000		1,133,346,000
Commercial loans collateralized by assignment of lease payments
Allowance for credit losses [Roll Forward]
Beginning Balance	8,529,000		7,490,000		7,755,000		7,561,000
Transfer to (from) allowance for unfunded credit commitments
Charge-offs	0				0		1,720,000
Provision	721,000		(149,000)		364,000		1,151,000
Ending Balance	9,250,000		7,452,000		9,250,000		7,452,000
Ending allowance balance attributable to loans:
Individually evaluated for impairment	285,000		180,000		285,000		180,000
Collectively evaluated for impairment	8,965,000		7,272,000		8,965,000		7,272,000
Acquired and accounted for under ASC 310-30		[1]				[1]
Loans:
Individually evaluated for impairment	2,330,000		1,168,000		2,330,000		1,168,000
Collectively evaluated for impairment	1,466,484,000		1,218,193,000		1,466,484,000		1,218,193,000
Unfunded Commitments
Transfer to (from) allowance for unfunded credit commitments
Allowance for credit losses
Financing receivable, allowance for credit losses, recovery	0		111,000		1,131,000		460,000
Total loans	1,468,814,000		1,219,361,000		1,468,814,000		1,219,361,000
Commercial real estate
Allowance for credit losses [Roll Forward]
Beginning Balance	60,014,000		68,713,000		61,056,000		68,695,000
Transfer to (from) allowance for unfunded credit commitments	0				0
Charge-offs	1,236,000		2,994,000		5,131,000		8,412,000
Provision	(3,983,000)		(12,253,000)		(5,517,000)		(10,040,000)
Ending Balance	55,761,000		66,359,000		55,761,000		66,359,000
Ending allowance balance attributable to loans:
Individually evaluated for impairment	7,464,000		7,567,000		7,464,000		7,567,000
Collectively evaluated for impairment	46,412,000		56,851,000		46,412,000		56,851,000
Acquired and accounted for under ASC 310-30	1,885,000	[1]	1,941,000	[1]	1,885,000	[1]	1,941,000	[1]
Loans:
Individually evaluated for impairment	60,600,000		56,037,000		60,600,000		56,037,000
Collectively evaluated for impairment	1,577,768,000		1,714,224,000		1,577,768,000		1,714,224,000
Acquired and accounted for under ASC 310-30	159,799,000	[1]	269,348,000	[1]	159,799,000	[1]	269,348,000	[1]
Unfunded Commitments
Transfer to (from) allowance for unfunded credit commitments	0				0
Allowance for credit losses
Financing receivable, allowance for credit losses, recovery	966,000		12,893,000		5,353,000		16,116,000
Total loans	1,798,167,000		2,039,609,000		1,798,167,000		2,039,609,000
Allowance for loan losses and unfunded commitments acquired with deteriorated credit quality	2,900,000				2,900,000				4,500,000
Residential real estate
Allowance for credit losses [Roll Forward]
Beginning Balance	8,121,000		3,592,000		6,941,000		3,935,000
Transfer to (from) allowance for unfunded credit commitments
Charge-offs	713,000		474,000		2,074,000		1,876,000
Provision	347,000		738,000		2,475,000		1,575,000
Ending Balance	7,803,000		3,864,000		7,803,000		3,864,000
Ending allowance balance attributable to loans:
Individually evaluated for impairment	3,033,000		401,000		3,033,000		401,000
Collectively evaluated for impairment	4,663,000		3,144,000		4,663,000		3,144,000
Acquired and accounted for under ASC 310-30	107,000	[1]	319,000	[1]	107,000	[1]	319,000	[1]
Loans:
Individually evaluated for impairment	15,851,000		11,127,000		15,851,000		11,127,000
Collectively evaluated for impairment	291,699,000		293,787,000		291,699,000		293,787,000
Acquired and accounted for under ASC 310-30	5,982,000	[1]	7,116,000	[1]	5,982,000	[1]	7,116,000	[1]
Unfunded Commitments
Transfer to (from) allowance for unfunded credit commitments
Allowance for credit losses
Financing receivable, allowance for credit losses, recovery	48,000		8,000		461,000		230,000
Total loans	313,532,000		312,030,000		313,532,000		312,030,000
Construction real estate
Allowance for credit losses [Roll Forward]
Beginning Balance	8,695,000		10,586,000		11,222,000		15,639,000
Transfer to (from) allowance for unfunded credit commitments	0				500,000		1,132,000
Charge-offs	26,000		71,000		855,000		3,951,000
Provision	(735,000)		(393,000)		(3,340,000)		(3,404,000)
Ending Balance	8,354,000		10,874,000		8,354,000		10,874,000
Ending allowance balance attributable to loans:
Individually evaluated for impairment	240,000		582,000		240,000		582,000
Collectively evaluated for impairment	8,114,000		10,292,000		8,114,000		10,292,000
Acquired and accounted for under ASC 310-30		[1]				[1]
Loans:
Individually evaluated for impairment	1,622,000		2,372,000		1,622,000		2,372,000
Collectively evaluated for impairment	134,524,000		147,500,000		134,524,000		147,500,000
Acquired and accounted for under ASC 310-30	61,446,000	[1]	125,515,000	[1]	61,446,000	[1]	125,515,000	[1]
Unfunded Commitments
Transfer to (from) allowance for unfunded credit commitments	0				500,000		1,132,000
Allowance for credit losses
Financing receivable, allowance for credit losses, recovery	420,000		752,000		827,000		1,458,000
Total loans	197,592,000		275,387,000		197,592,000		275,387,000
Indirect vehicle
Allowance for credit losses [Roll Forward]
Beginning Balance	1,537,000		1,941,000		1,324,000		1,834,000
Transfer to (from) allowance for unfunded credit commitments
Charge-offs	572,000		433,000		1,930,000		1,636,000
Provision	293,000		288,000		1,125,000		987,000
Ending Balance	1,630,000		2,020,000		1,630,000		2,020,000
Ending allowance balance attributable to loans:
Individually evaluated for impairment			0				0
Collectively evaluated for impairment	1,630,000		2,020,000		1,630,000		2,020,000
Acquired and accounted for under ASC 310-30		[1]				[1]
Loans:
Individually evaluated for impairment	106,000				106,000
Collectively evaluated for impairment	257,634,000		206,973,000		257,634,000		206,973,000
Unfunded Commitments
Transfer to (from) allowance for unfunded credit commitments
Allowance for credit losses
Financing receivable, allowance for credit losses, recovery	372,000		224,000		1,111,000		835,000
Total loans	257,740,000		206,973,000		257,740,000		206,973,000
Home equity lines
Allowance for credit losses [Roll Forward]
Beginning Balance	8,206,000		7,617,000		9,401,000		7,333,000
Transfer to (from) allowance for unfunded credit commitments
Charge-offs	437,000		1,209,000		2,547,000		3,157,000
Provision	(152,000)		370,000		549,000		2,482,000
Ending Balance	7,845,000		7,081,000		7,845,000		7,081,000
Ending allowance balance attributable to loans:
Individually evaluated for impairment	781,000		0		781,000		0
Collectively evaluated for impairment	7,064,000		7,081,000		7,064,000		7,081,000
Acquired and accounted for under ASC 310-30		[1]				[1]
Loans:
Individually evaluated for impairment	23,278,000		10,280,000		23,278,000		10,280,000
Collectively evaluated for impairment	251,206,000		304,438,000		251,206,000		304,438,000
Acquired and accounted for under ASC 310-30	110,000	[1]	568,000	[1]	110,000	[1]	568,000	[1]
Unfunded Commitments
Transfer to (from) allowance for unfunded credit commitments
Allowance for credit losses
Financing receivable, allowance for credit losses, recovery	228,000		303,000		442,000		423,000
Total loans	274,594,000		315,286,000		274,594,000		315,286,000
Other consumer
Allowance for credit losses [Roll Forward]
Beginning Balance	1,306,000		1,028,000		1,562,000		695,000
Transfer to (from) allowance for unfunded credit commitments
Charge-offs	485,000		332,000		1,501,000		864,000
Provision	368,000		558,000		1,017,000		1,220,000
Allowance for unfunded credit commitments, ending balance			3,744,000				3,744,000
Ending Balance	1,263,000		1,331,000		1,263,000		1,331,000
Ending allowance balance attributable to loans:
Individually evaluated for impairment			0				0
Collectively evaluated for impairment	1,263,000		1,331,000		1,263,000		1,331,000
Acquired and accounted for under ASC 310-30		[1]				[1]
Loans:
Individually evaluated for impairment	0		248,000		0		248,000
Collectively evaluated for impairment	57,418,000		84,403,000		57,418,000		84,403,000
Acquired and accounted for under ASC 310-30	29,014,000	[1]	38,202,000	[1]	29,014,000	[1]	38,202,000	[1]
Unfunded Commitments
Transfer to (from) allowance for unfunded credit commitments
Allowance for unfunded credit commitments, ending balance			3,744,000				3,744,000
Allowance for credit losses
Financing receivable, allowance for credit losses, recovery	74,000		77,000		185,000		280,000
Total loans	86,432,000		122,853,000		86,432,000		122,853,000
Purchased loans
Allowance for credit losses [Roll Forward]
Provision	(1,500,000)				(2,500,000)
Allowance for credit losses
Provision and charge-offs related to the number of pools	15
Allowance for loan losses and unfunded commitments write offs net of recoveries	(677,000)				(830,000)
Total loans	$ 219,100,000				$ 219,100,000

[1] Loans acquired in FDIC-assisted transactions and accounted for under ASC Subtopic 310-30 “Receivables — Loans and Debt Securities Acquired with Deteriorated Credit Quality.”

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Commitments and Contingencies (Details) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Dec. 31, 2012
Commitments [Abstract]
Maximum maturity period for letters of credit (in years)	5 years
Increase (decrease) in maximum potential amount of future payments under letters of credit		$ 6,700,000
Dollar amount of letters of credit outstanding	73,400,000	73,400,000	66,700,000
Letters of credit issued or renewed		52,600,000
Capital expenditure commitments outstanding		1,400,000
Home equity lines
Commitments and contingencies
Dollar amount of line of credit outstanding	216,992,000	216,992,000	239,771,000
Other commitments
Commitments and contingencies
Dollar amount of line of credit outstanding	1,139,255,000	1,139,255,000	911,166,000
Standby
Commitments and contingencies
Dollar amount of line of credit outstanding	70,720,000	70,720,000	66,247,000
Commercial
Commitments and contingencies
Dollar amount of line of credit outstanding	$ 2,705,000	$ 2,705,000	$ 465,000

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Earnings Per Common Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Basic and diluted earnings per common share:
Net income (loss)	$ 24,400	$ 23,133	$ 74,599	$ 66,362
Less: preferred stock dividends and discount accretion	0	0	0	3,269
Net income available to common stockholders	24,400	23,133	74,599	63,093
Earnings allocated to common stockholders	24,399	23,132	74,597	63,091
Weighted average shares outstanding for basic earnings per common share	54,565,089	54,346,827	54,471,541	54,226,241
Weighted average shares outstanding for diluted earnings per common share	55,130,653	54,556,517	54,912,352	54,472,617
Basic earnings per common share	$ 0.45	$ 0.43	$ 1.37	$ 1.16
Diluted earnings per common share	$ 0.44	$ 0.42	$ 1.36	$ 1.16
Common Stock
Basic and diluted earnings per common share:
Distributed earnings allocated to common stock	6,636	548	17,653	1,643
Undistributed earnings	17,764	22,585	56,946	64,719
Net income (loss)	24,400	23,133	74,599	66,362
Net income available to common stockholders	24,400	23,133	74,599	63,093
Dilutive effect of equity awards	565,564	209,690	440,811	246,376
Participating Securities
Basic and diluted earnings per common share:
Less: earnings allocated to participating securities	$ 1	$ 1	$ 2	$ 2

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Business Combinations (Tables)

9 Months Ended

Sep. 30, 2013

Business Combinations [Abstract]

Assets Acquired and Liabilities Assumed

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

Assets Acquired and Liabilities Assumed

(Dollar Amounts in Thousands)

	Celtic
	December 28,
	2012
ASSETS
Cash and cash equivalents	$	31,647
Investment securities available for sale	635
Loans and leases	32,933
Premises and equipment	81
Goodwill	36,300
Other intangibles	5,028
Other assets	27,323
Total assets	$	133,947
LIABILITIES
Accrued expenses and other liabilities	$	75,290
Total liabilities	$	75,290
Cash paid on acquisition	$	58,657
Net gain recorded on acquisition	$	—

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Earnings Per Common Share (Tables)

9 Months Ended

Sep. 30, 2013

Accounting Policies [Abstract]

Reconciliation of the number of shares used in the calculation of basic and diluted earnings (loss) per common share, net income available to common stockholders, and earnings per 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 September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Distributed earnings allocated to common stock	$	6,636	$	548	$	17,653	$	1,643
Undistributed earnings	17,764		22,585		56,946		64,719
Net income	24,400		23,133		74,599		66,362
Less: preferred stock dividends and discount accretion	—		—		—		3,269
Net income available to common stockholders	24,400		23,133		74,599		63,093
Less: earnings allocated to participating securities	1		1		2		2
Earnings allocated to common stockholders	$	24,399	$	23,132	$	74,597	$	63,091
Weighted average shares outstanding for basic earnings per common share	54,565,089		54,346,827		54,471,541		54,226,241
Dilutive effect of equity awards	565,564		209,690		440,811		246,376
Weighted average shares outstanding for diluted earnings per common share	55,130,653		54,556,517		54,912,352		54,472,617
Basic earnings per common share	$	0.45	$	0.43	$	1.37	$	1.16
Diluted earnings per common share	0.44		0.42		1.36		1.16

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Loans (Details 4) (USD $)	3 Months Ended	9 Months Ended		12 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended			9 Months Ended			3 Months Ended		3 Months Ended	9 Months Ended		9 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended			9 Months Ended	3 Months Ended		9 Months Ended				9 Months Ended			3 Months Ended	9 Months Ended		3 Months Ended		9 Months Ended				3 Months Ended	9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2013 note	Sep. 30, 2013 loan	Sep. 30, 2012 loan	Dec. 31, 2012 loan	Sep. 30, 2013 Performing loan	Sep. 30, 2012 Performing loan	Sep. 30, 2013 Performing loan	Sep. 30, 2012 Performing loan	Sep. 30, 2013 Non-performing loan	Sep. 30, 2012 Non-performing loan	Sep. 30, 2013 Non-performing loan	Sep. 30, 2012 Non-performing loan	Sep. 30, 2013 Commercial loans	Sep. 30, 2013 Commercial loans Non-performing loan	Sep. 30, 2012 Commercial loans Non-performing loan	Sep. 30, 2013 Commercial loans collateralized by assignment of lease payments	Sep. 30, 2012 Commercial loans collateralized by assignment of lease payments Non-performing loan	Sep. 30, 2013 Healthcare	Sep. 30, 2013 Healthcare Non-performing loan	Sep. 30, 2013 Healthcare Non-performing loan	Sep. 30, 2013 Industrial	Sep. 30, 2013 Industrial Non-performing loan	Sep. 30, 2013 Multifamily	Sep. 30, 2013 Multifamily Performing loan	Sep. 30, 2012 Multifamily Performing loan	Sep. 30, 2013 Multifamily Non-performing loan	Sep. 30, 2013 Multifamily Non-performing loan	Sep. 30, 2012 Multifamily Non-performing loan	Sep. 30, 2013 Retail	Sep. 30, 2012 Retail Performing loan	Sep. 30, 2013 Retail Non-performing loan	Sep. 30, 2012 Retail Non-performing loan	Sep. 30, 2013 Retail Non-performing loan	Sep. 30, 2012 Retail Non-performing loan	Sep. 30, 2013 Office	Sep. 30, 2013 Other	Sep. 30, 2013 Other Non-performing loan	Sep. 30, 2012 Other Non-performing loan	Sep. 30, 2013 Residential real estate	Sep. 30, 2013 Residential real estate Performing loan	Sep. 30, 2013 Residential real estate Performing loan	Sep. 30, 2012 Residential real estate Performing loan	Sep. 30, 2013 Residential real estate Non-performing loan	Sep. 30, 2012 Residential real estate Non-performing loan	Sep. 30, 2013 Residential real estate Non-performing loan	Sep. 30, 2012 Residential real estate Non-performing loan	Sep. 30, 2013 Construction real estate	Sep. 30, 2013 Indirect vehicle	Sep. 30, 2013 Indirect vehicle Non-performing loan	Sep. 30, 2013 Indirect vehicle Non-performing loan	Sep. 30, 2013 Home equity lines	Sep. 30, 2013 Home equity lines Performing loan	Sep. 30, 2012 Home equity lines Performing loan	Sep. 30, 2013 Home equity lines Performing loan	Sep. 30, 2012 Home equity lines Performing loan	Sep. 30, 2013 Home equity lines Non-performing loan	Sep. 30, 2012 Home equity lines Non-performing loan	Sep. 30, 2013 Home equity lines Non-performing loan	Sep. 30, 2012 Home equity lines Non-performing loan	Sep. 30, 2013 Other consumer
Restructured loans
Number of separate notes restructured into A/B by the company	2
Minimum period of sustained repayment required to return the note to accrual status (in months)		6 months
Restructured loans representing A/B structures				$ 3,100,000
Number of A/B structures represented by restructured loans		0		1
Number of loans			1		2	7	13	42	26	14	64	58		2	4		1		1	1		4		1	1	1	2	1		1	1	1	3	4			1	1		1	5	2	1	7	6	13			17	20		1	7	7	38	5	5	25	34
Pre-Modification Recorded Investment			202,000		114,000	401,000	2,178,000	7,208,000	4,709,000	924,000	13,163,000	7,684,000		1,251,000	292,000		202,000		3,164,000	3,164,000		2,570,000		601,000	155,000	436,000	623,000	149,000		236,000	205,000	202,000	862,000	923,000			84,000	157,000		95,000	854,000	808,000	394,000	173,000	1,149,000	637,000			113,000	127,000		19,000	401,000	723,000	6,009,000	397,000	347,000	3,333,000	5,324,000
Post-Modification Recorded Investment			202,000		114,000	325,000	2,178,000	7,132,000	4,685,000	704,000	13,139,000	7,023,000		1,251,000	292,000		202,000		3,164,000	3,164,000		2,570,000		601,000	155,000	436,000	623,000	149,000		236,000	205,000	202,000	862,000	923,000			84,000	157,000		95,000	854,000	808,000	394,000	68,000	1,149,000	401,000			89,000	103,000		19,000	325,000	723,000	5,933,000	397,000	232,000	3,333,000	4,899,000
Charge-offs and Specific Reserves			168,000		0	76,000	0	76,000	695,000	588,000	3,045,000	1,247,000		673,000	96,000		168,000		496,000	496,000		1,425,000		0	0	119,000	169,000	40,000		0	56,000	200,000	235,000	232,000			23,000	50,000		0	0	0	0	105,000	0	236,000			24,000	24,000		0	76,000	0	76,000	0	115,000	0	425,000
Redefaulted loans	0	0
Period past due of recorded redefaulted loans (in days)	90 days
Troubled Debt Restructuring Activity [Roll Forward]
Beginning balance							21,256,000				28,418,000		1,251,000			0		3,164,000			2,570,000		1,224,000						862,000						0	84,000			2,004,000								0	127,000			4,055,000									0
Additions							2,178,000				13,163,000
Charge-offs							0				(3,127,000)
Principal payments, net							(883,000)				(8,008,000)
Removals							0				(565,000)
Transfer to other real estate owned							0				(206,000)
Transfer from/to performing							8,458,000				1,098,000
Transfer from/to nonperforming							(1,098,000)				(8,458,000)
Ending balance	$ 15,341,000	$ 15,341,000			$ 29,911,000		$ 29,911,000		$ 22,315,000		$ 22,315,000		$ 1,251,000			$ 0		$ 3,164,000			$ 2,570,000		$ 1,224,000						$ 862,000						$ 0	$ 84,000			$ 2,004,000								$ 0	$ 127,000			$ 4,055,000									$ 0

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Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2013

Commitments and Contingencies Disclosure [Abstract]

Schedule of outstanding financial instruments, contractual amounts of off-balance sheet credit risk

At September 30, 2013 and December 31, 2012, the following financial instruments were outstanding, the contractual amounts of which represent off-balance sheet credit risk (in thousands):

	Contractual Amount
	September 30, 2013		December 31, 2012
Commitments to extend credit:
Home equity lines	$	216,992	$	239,771
Other commitments	1,139,255		911,166
Letters of credit:
Standby	70,720		66,247
Commercial	2,705		465

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Investment Securities (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Available for Sale
Amortized Cost	$ 1,082,076	$ 1,082,076		$ 1,808,521
Gross Unrealized Gains	13,989	13,989		66,005
Gross Unrealized Losses	(5,942)	(5,942)		(6,355)
Fair Value	1,090,123	1,090,123		1,868,171
Held to Maturity
Investment securities held to maturity	1,193,544	1,193,544		493,421
Gross Unrealized Gains	22,685	22,685		42,260
Gross Unrealized Losses	(3,481)	(3,481)		0
Investment Securities held to maturity	1,212,748	1,212,748		535,681
Total Available for Sale and Held to Maturity Investment Securities
Amortized Cost	2,275,620	2,275,620		2,301,942
Gross Unrealized Gains	36,674	36,674		108,265
Gross Unrealized Losses	(9,423)	(9,423)		(6,355)
Fair Value	2,302,871	2,302,871		2,403,852
Transfer of investment securities available for sale to investment securities held to maturity	656,600	656,617	0
U.S. Government sponsored agencies and enterprises
Available for Sale
Amortized Cost	50,678	50,678		38,605
Gross Unrealized Gains	1,849	1,849		2,710
Gross Unrealized Losses	0	0		0
Fair Value	52,527	52,527		41,315
States and political subdivisions
Available for Sale
Amortized Cost	19,461	19,461		679,991
Gross Unrealized Gains	52	52		45,571
Gross Unrealized Losses	(201)	(201)		(543)
Fair Value	19,312	19,312		725,019
Held to Maturity
Investment securities held to maturity	941,273	941,273		237,563
Gross Unrealized Gains	8,517	8,517		21,039
Gross Unrealized Losses	(3,481)	(3,481)		0
Investment Securities held to maturity	946,309	946,309		258,602
Total Available for Sale and Held to Maturity Investment Securities
Percentage of securities consisting general obligation issues		90.00%
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		27.00%
Residential mortgage-backed securities
Available for Sale
Amortized Cost	685,126	685,126		930,413
Gross Unrealized Gains	8,659	8,659		14,038
Gross Unrealized Losses	(2,509)	(2,509)		(5,249)
Fair Value	691,276	691,276		939,202
Held to Maturity
Investment securities held to maturity	252,271	252,271		255,858
Gross Unrealized Gains	14,168	14,168		21,221
Gross Unrealized Losses	0	0		0
Investment Securities held to maturity	266,439	266,439		277,079
Commercial mortgage-backed securities
Available for Sale
Amortized Cost	50,944	50,944		51,100
Gross Unrealized Gains	2,502	2,502		3,026
Gross Unrealized Losses	0	0		0
Fair Value	53,446	53,446		54,126
Corporate bonds
Available for Sale
Amortized Cost	265,293	265,293		97,014
Gross Unrealized Gains	927	927		213
Gross Unrealized Losses	(3,199)	(3,199)		(553)
Fair Value	263,021	263,021		96,674
Equity securities
Available for Sale
Amortized Cost	10,574	10,574		11,398
Gross Unrealized Gains	0	0		447
Gross Unrealized Losses	(33)	(33)		(10)
Fair Value	$ 10,541	$ 10,541		$ 11,835

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Loans (Details 7) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Changes in the accretable yield for purchased credit-impaired loans
Balance at beginning of period	$ 6,360	$ 9,411	$ 5,685	$ 18,703
Accretion	(2,427)	(3,406)	(2,859)	(12,812)
Other	0	403	1,107	517
Balance at end of period	$ 3,933	$ 6,408	$ 3,933	$ 6,408

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Deposits (Tables)

9 Months Ended

Sep. 30, 2013

Deposits [Abstract]

Schedule of composition of deposits

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

	September 30,		December 31,
	2013		2012
Demand deposit accounts, noninterest bearing	$	2,269,367	$	2,164,547
NOW and money market accounts	2,680,127		2,747,273
Savings accounts	843,671		811,333
Certificates of deposit, $100,000 or more	838,606		1,020,033
Other certificates of deposit	666,915		799,511
Total	$	7,298,686	$	7,542,697

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Derivative Financial Instruments (Details) (USD $)	3 Months Ended			9 Months Ended			12 Months Ended
	Sep. 30, 2013		Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012	Dec. 31, 2012
Derivative [Line Items]
Net amount receivable under interest rate swap				$ 24,000
Net amount payable under interest rate swap							30,000
Interest rate swap credit risk exposure	17,900,000			17,900,000
Asset Derivatives, Notional Amount	675,473,000			675,473,000			562,735,000
Asset Derivatives, Estimated Fair Value	19,112,000			19,112,000			29,096,000
Liability Derivatives, Notional Amount	673,927,000			673,927,000			559,402,000
Liability Derivatives, Estimated Fair Value	(19,060,000)			(19,060,000)			(29,055,000)
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]
Amounts of gain or (loss) recognized in income on derivatives	(22,000)		29,000	(48,000)		106,000
Stand-alone derivative instruments
Derivative [Line Items]
Asset Derivatives, Notional Amount	675,473,000			675,473,000			562,735,000
Asset Derivatives, Estimated Fair Value	19,112,000			19,112,000			29,096,000
Liability Derivatives, Notional Amount	673,679,000			673,679,000			555,695,000
Liability Derivatives, Estimated Fair Value	(19,034,000)			(19,034,000)			(28,961,000)
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]
Amounts of gain or (loss) recognized in income on derivatives	(21,000)		29,000	(57,000)		142,000
Commercial loan interest rate swaps
Derivative [Line Items]
Liability Derivatives, Notional Amount	248,000			248,000
Interest rate swap contracts | Derivative instruments designated as hedges of fair value
Derivative [Line Items]
Liability Derivatives, Notional Amount	248,000	[1]		248,000	[1]		3,707,000	[1]
Liability Derivatives, Estimated Fair Value	(26,000)	[1]		(26,000)	[1]		(94,000)	[1]
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]
Amounts of gain or (loss) recognized in income on derivatives	(1,000)		0	9,000		(36,000)
Interest rate swap contracts | Stand-alone derivative instruments
Derivative [Line Items]
Asset Derivatives, Notional Amount	570,472,000	[2]		570,472,000	[2]		460,956,000	[2]
Asset Derivatives, Estimated Fair Value	17,813,000	[2]		17,813,000	[2]		27,740,000	[2]
Liability Derivatives, Notional Amount	571,445,000	[2]		571,445,000	[2]		462,012,000	[2]
Liability Derivatives, Estimated Fair Value	(17,875,000)	[2]		(17,875,000)	[2]		(27,832,000)	[2]
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]
Amounts of gain or (loss) recognized in income on derivatives	7,000		6,000	30,000		19,000
Interest rate options contracts | Stand-alone derivative instruments
Derivative [Line Items]
Asset Derivatives, Notional Amount	84,095,000	[2]		84,095,000	[2]		70,346,000	[2]
Asset Derivatives, Estimated Fair Value	307,000	[2]		307,000	[2]		157,000	[2]
Liability Derivatives, Notional Amount	84,095,000	[2]		84,095,000	[2]		70,346,000	[2]
Liability Derivatives, Estimated Fair Value	(307,000)	[2]		(307,000)	[2]		(157,000)	[2]
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]
Amounts of gain or (loss) recognized in income on derivatives	0		0	0		0
Foreign exchange contracts | Stand-alone derivative instruments
Derivative [Line Items]
Asset Derivatives, Notional Amount	16,112,000	[2]		16,112,000	[2]		20,033,000	[2]
Asset Derivatives, Estimated Fair Value	912,000	[2]		912,000	[2]		1,062,000	[2]
Liability Derivatives, Notional Amount	15,536,000	[2]		15,536,000	[2]		19,337,000	[2]
Liability Derivatives, Estimated Fair Value	(818,000)	[2]		(818,000)	[2]		(961,000)	[2]
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]
Amounts of gain or (loss) recognized in income on derivatives	(12,000)		14,000	(7,000)		44,000
Mortgage banking derivatives | Stand-alone derivative instruments
Derivative [Line Items]
Asset Derivatives, Notional Amount	4,794,000	[2]		4,794,000	[2]		11,400,000	[2]
Asset Derivatives, Estimated Fair Value	80,000	[2]		80,000	[2]		137,000	[2]
Liability Derivatives, Notional Amount	2,603,000	[2]		2,603,000	[2]		4,000,000	[2]
Liability Derivatives, Estimated Fair Value	(34,000)	[2]		(34,000)	[2]		(11,000)	[2]
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]
Amounts of gain or (loss) recognized in income on derivatives	$ (16,000)		$ 9,000	$ (80,000)		$ 79,000

[1] Hedged fixed-rate commercial real estate loans

[2] These portfolio swaps are not designated as hedging instruments under ASC Topic 815.

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Stock Incentive Plans (Details) (USD $)	3 Months Ended		9 Months Ended				9 Months Ended							12 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 Omnibus Incentive Plan (the "Omnibus Plan")	Jun. 30, 2011 Omnibus Incentive Plan (the "Omnibus Plan")	Sep. 30, 2013 Stock options	Sep. 30, 2012 Stock options	Sep. 30, 2013 Stock options Director	Sep. 30, 2013 Restricted stock and restricted stock units	Sep. 30, 2013 Restricted stock Director	Sep. 30, 2013 Performance-based restricted stock units	Sep. 30, 2012 Performance-based restricted stock units	Dec. 31, 2011 Market-based restricted stock	Dec. 31, 2010 Market-based restricted stock	Sep. 30, 2013 Salary Stock	Sep. 30, 2013 Minimum Restricted stock and restricted stock units	Sep. 30, 2013 Minimum Performance-based restricted stock units	Sep. 30, 2013 Maximum Restricted stock and restricted stock units	Sep. 30, 2013 Maximum Performance-based restricted stock units
Impact of the share-based payment plans in the financial statements
Total cost of share-based payment plans during the period	$ 1,388,000	$ 1,080,000	$ 3,860,000	$ 3,581,000
Amount of related income tax benefit recognized in income	548,000	430,000	1,530,000	1,431,000
Stock-based compensation
Number of additional authorized shares						2,300,000
Number of common shares authorized for issuance						8,300,000
Numerator of shares granted beyond threshold limit			2
Denominator of shares granted beyond threshold limit			1
Number of shares available for future grants					1,617,262
Continuous service period for vesting of option awards (in years)							4 years
Contractual terms of option awards (in years)							10 years
Minimum vesting period (in years)									5 years		1 year						2 years		4 years
Maximum percentage of fees with an option to be received in equity-based incentive awards									70.00%		100.00%
Period of restriction for sale of underlying shares (in months)									6 months
Number of shares issued												56,752	65,333	92,717	66,193	876
Share-Based Compensation Arrangement By Share Based Payment Award, Percentage Of Shares Earned To Number Of Units Issued																		0.00%		175.00%
Performance based restricted units performance period (in years)												3 years
Share based compensation restricted stock units multiplier (in percent)												100.00%
Number of consecutive trading days over which a specified closing price of the entity's stock is maintained														10 days	10 days
Minimum closing price of the entity's stock (in dollars per share)														$ 27.00	$ 25.80
Period of restriction for sale of shares of Salary Stock (in years)																2 years
Weighted average issuance price of Salary Stock (in dollars per share)																$ 22.39
Unrecognized compensation cost					14,200,000
Expected weighted-average period for recognition of unrecognized compensation expense (in years)					2 years 10 months 9 days
Options outstanding activity
Options outstanding at the beginning of the period (in shares)							2,739,753
Granted (in shares)							211,501
Exercised (in shares)							(330,832)
Expired or cancelled (in shares)							(113,290)
Forfeited (in shares)							(17,857)
Options outstanding at the end of the period (in shares)							2,489,275
Options exercisable at end of the period (in shares)							1,809,183
Weighted Average Exercise Price
Options outstanding at the beginning of the period (in dollars per share)							$ 27.34
Granted (in dollars per share)							$ 27.03
Exercised (in dollars per share)							$ 25.51
Expired or cancelled (in dollars per share)							$ 30.91
Forfeited (in dollars per share)							$ 20.18
Options outstanding at the end of the period (in dollars per share)							$ 27.44
Options exercisable at end of the period (in dollars per share)							$ 29.72
Weighted Average Remaining Contractual Term (In Years)
Options outstanding at the end of the period							4 years 11 months 9 days
Options exercisable at end of the period							3 years 8 months 1 day
Aggregate Intrinsic Value
Options outstanding at the end of the period							9,407,000
Options exercisable at end of the period							4,764,000
Fair value assumptions
Risk free interest rate (as a percent)							1.96%
Expected volatility of Company's stock (as a percent)							25.60%
Expected dividend yield (as a percent)							1.74%
Expected life of options (in years)							5 years 7 months 6 days
Weighted average fair value per option of options granted during the year (in dollars per share)							$ 5.97
Total intrinsic value of options exercised							$ 929,000	$ 203,000
Changes in restricted shares
Nonvested shares of restricted stock and nonvested restricted stock units at the beginning of the period										634,211
Granted (in shares)										270,983
Vested (in shares)										(201,178)
Forfeited (in shares)										(13,983)
Nonvested shares of restricted stock and nonvested restricted stock units at the end of the period										690,033
Weighted Average Grant Date Fair Value, restricted shares
Shares Outstanding at the beginning of the period (in dollars per share)										$ 18.82
Granted (in dollars per share)										$ 26.91
Vested (in dollars per share)										$ 16.79
Forfeited (in dollars per share)										$ 20.52
Nonvested shares of restricted stock and nonvested restricted stock units at the end of the period (in dollars per share)										$ 22.55

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Loans (Details) (USD $)	9 Months Ended
	Sep. 30, 2013 investmentrating	Dec. 31, 2012	Sep. 30, 2012
Loans
Total loans, excluding covered loans	$ 5,313,235,000	$ 5,317,080,000
Covered loans	273,497,000	449,850,000
Loans and Leases Receivable, Net of Deferred Income Including Covered Loans	5,586,732,000	5,766,930,000	5,624,845,000
Net unearned income, including net deferred loan fees	1,500,000	1,100,000
Number of highest rating categories by rating services company	1
Number of highest rating categories to be achieved for classification as investment grade companies	4
Commercial loans
Loans
Total loans, excluding covered loans	1,169,009,000	1,220,472,000
Covered loans	3,984,000
Loans and Leases Receivable, Net of Deferred Income Including Covered Loans	1,189,861,000		1,133,346,000
Commercial loans collateralized by assignment of lease payments
Loans
Total loans, excluding covered loans	1,468,814,000	1,303,020,000
Loans and Leases Receivable, Net of Deferred Income Including Covered Loans	1,468,814,000		1,219,361,000
Commercial real estate
Loans
Total loans, excluding covered loans	1,638,368,000	1,761,832,000
Covered loans	159,799,000
Loans and Leases Receivable, Net of Deferred Income Including Covered Loans	1,798,167,000		2,039,609,000
Residential real estate
Loans
Total loans, excluding covered loans	311,256,000	314,359,000
Loans and Leases Receivable, Net of Deferred Income Including Covered Loans	313,532,000		312,030,000
Construction real estate
Loans
Total loans, excluding covered loans	136,146,000	110,261,000
Covered loans	61,446,000
Loans and Leases Receivable, Net of Deferred Income Including Covered Loans	197,592,000		275,387,000
Indirect vehicle
Loans
Total loans, excluding covered loans	257,740,000	208,633,000
Loans and Leases Receivable, Net of Deferred Income Including Covered Loans	257,740,000		206,973,000
Home equity lines
Loans
Total loans, excluding covered loans	274,484,000	305,186,000
Loans and Leases Receivable, Net of Deferred Income Including Covered Loans	274,594,000		315,286,000
Other consumer
Loans
Total loans, excluding covered loans	57,418,000	93,317,000
Loans and Leases Receivable, Net of Deferred Income Including Covered Loans	$ 86,432,000		$ 122,853,000

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New Authoritative Accounting Guidance (Policies)

9 Months Ended

Sep. 30, 2013

New Authoritative Accounting Guidance [Abstract]

New Authoritative Accounting Pronouncements

ASC Topic 805 “Business Combinations.” New authoritative accounting guidance under ASC Topic 805, “Business Combinations” amended prior guidance on the subsequent accounting for an indemnification asset recognized at the acquisition date as a result of a government-assisted (Federal Deposit Insurance Corporation) acquisition of a financial institution that includes a loss-sharing agreement. The new authoritative guidance requires that at each subsequent reporting date, an acquirer measure an indemnification asset on the same basis as the indemnified liability or asset, subject to any contractual limitations on its amount, and, for an indemnification asset that is not subsequently measured at fair value, management's assessment of the collectability of the indemnification asset. Any amortization of changes in value should be limited to the contractual term of the indemnification agreement (that is, the lesser of the term of the indemnification agreement and the remaining life of the indemnified assets). The Company adopted this new authoritative guidance on January 1, 2013, and it did not have an impact on the Company's statements of operations and financial condition.

ASC Topic 210 “Disclosures about Offsetting Assets and Liabilities.” New authoritative accounting guidance under ASC Topic 210, “Disclosures about Offsetting Assets and Liabilities” amended prior guidance to require an entity to disclose both gross and net information about both instruments and transactions eligible for offset in the statement of financial position and instruments and transactions subject to an agreement similar to a master netting arrangement. The instruments and transactions would include derivatives, sale and repurchase agreements and reverse sale and repurchase agreements, and securities borrowing and securities lending arrangements. This new authoritative guidance was further amended to clarify the scope of offsetting disclosures. The Company adopted the new authoritative guidance on January 1, 2013, and it did not have an impact on the Company's statements of operations and financial condition. See disclosures in Note 15.

ASC Topic 220 “Comprehensive Income.” New authoritative accounting guidance under ASC Topic 220, “Comprehensive Income” amended prior guidance to improve the reporting of reclassifications out of accumulated other comprehensive income by requiring an entity to provide information about the amounts reclassified out of accumulated other comprehensive income by component. In addition, an entity is required to present, either on the face of the statement or in the notes, significant amounts reclassified out of accumulated other comprehensive income by the respective line items of net income if the amount reclassified is required under U.S. GAAP. The Company adopted this new authoritative guidance on January 1, 2013, and it did not have an impact on the Company's statements of operations and financial condition.

ASC Topic 815 “Derivatives and Hedging.” New authoritative accounting guidance under ASC Topic 815, “Derivatives and Hedging” amended prior guidance to permit the Fed Funds Effective Swap Rate (OIS) to be used as a U.S. benchmark interest rate for hedge accounting purposes, in addition to U.S. government treasury obligation rates and London Interbank Offered Rate swap rate. The amendments also remove the restriction on using different benchmark rates for similar hedges. The new authoritative guidance will be effective prospectively for new and redesignated hedging relationships entered into on or after July 17, 2013 and is not expected to have an impact on the Company's statements of operations and financial condition.

ASC Topic 740 “Income Taxes.” New authoritative accounting guidance under ASC Topic 740, “Income Taxes” amended prior guidance to include explicit guidance on the financial statement presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. An unrecognized tax benefit, or a portion of an unrecognized tax benefit, should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, except as follows. To the extent a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional income taxes that would result from the disallowance of a tax position or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. The new authoritative guidance will be for reporting periods after January 1, 2014 and is not expected to have an impact on the Company's statements of operations and financial condition.

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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss), Net of Tax	Treasury Stock	Noncontrolling Interest
Balance at Dec. 31, 2011	$ 1,393,027	$ 194,719	$ 548	$ 731,248	$ 427,956	$ 39,150	$ (3,044)	$ 2,450
Increase (Decrease) in Stockholders' Equity
Net income	66,546				66,362			184
Other comprehensive loss, net of tax	1,835					1,835
Cash dividends declared on common stock	(1,643)				(1,643)
Dividends and discount accretion on preferred shares	(1,988)	1,281			(3,269)
Repurchase of preferred shares and warrant	(197,518)	(196,000)	0	(1,518)	0	0	0	0
Restricted common stock activity, net of tax	1,071		2	(722)	17		1,774
Stock option activity, net of tax	(277)			(625)	3		345
Repurchase of common shares in connection with employee benefit plans and held in trust for deferred compensation plan	(1,928)			451			(2,379)
Stock-based compensation expense	3,581			3,581
Adjustments To Additional Paid In Capital Investment In Subsidiary	(1,640)	0	0	(736)	0	0	0	(904)
Distributions to noncontrolling interest	(236)							(236)
Balance at Sep. 30, 2012	1,260,830	0	550	731,679	489,426	40,985	(3,304)	1,494
Balance at Dec. 31, 2012	1,275,770		550	732,771	507,933	36,326	(3,293)	1,483
Increase (Decrease) in Stockholders' Equity
Net income	74,736				74,599			137
Other comprehensive loss, net of tax	(26,408)					(26,408)
Cash dividends declared on common stock	(17,653)				(17,653)
Restricted common stock activity, net of tax	869		1	(757)	(100)		1,725
Stock option activity, net of tax	616			117			499
Repurchase of common shares in connection with employee benefit plans and held in trust for deferred compensation plan	(2,153)			303			(2,456)
Stock-based compensation expense	3,860			3,860
Distributions to noncontrolling interest	(169)							(169)
Balance at Sep. 30, 2013	$ 1,309,468	$ 0	$ 551	$ 736,294	$ 564,779	$ 9,918	$ (3,525)	$ 1,451

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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash Flows From Operating Activities
Net income (loss)	$ 74,599	$ 66,362
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of premises and equipment	13,165	11,450
Depreciation of leased equipment	24,933	28,107
Impairment charges on branch facilities	0	758
Compensation expense for restricted stock awards	3,013	2,586
Compensation expense for stock option grants	847	995
Gain on sales of premises and equipment and leased equipment	(192)	(2,746)
Amortization of other intangibles	4,595	3,759
Provision for credit losses	(2,804)	(9,900)
Deferred income tax expense	13,067	19,763
Amortization of premiums and discounts on investment securities, net	35,364	31,838
Accretion of premiums and discounts on loans, net	(5,462)	(13,000)
Accretion of FDIC indemnification asset	(307)	(901)
Net gain on sale of investment securities available for sale	(14)	(244)
Proceeds from sale of loans held for sale	74,395	64,124
Origination of loans held for sale	(66,667)	(64,980)
Net gain on sale of loans held for sale	(1,322)	(1,503)
Net gain on sales of other real estate owned	(977)	(1,264)
Fair value adjustments on other real estate owned	(80)	13,919
Net loss on sales of other real estate owned related to FDIC-assisted transactions	163	3,313
Increase in cash surrender value of life insurance	(2,537)	(2,677)
Decrease (increase) in other assets, net	30,976	(45,242)
(Decrease) increase in other liabilities, net	(68,428)	7,944
Net cash provided by operating activities	126,327	112,461
Cash Flows From Investing Activities
Increase in federal funds sold	(47,500)	0
Proceeds from sales of investment securities available for sale	989	12,573
Proceeds from maturities and calls of investment securities available for sale	415,780	432,162
Purchases of investment securities available for sale	(364,550)	(350,669)
Proceeds from maturities and calls of investment securities held to maturity	5,079	960
Purchases of investment securities held to maturity	(55,409)	(1,923)
Purchases of non-marketable securities - FHLB and FRB stock	0	(24)
Redemption of non-marketable securities - FHLB and FRB stock	4,515	23,203
Net decrease in loans	170,586	329,773
Purchases of premises and equipment	(11,342)	(16,952)
Purchases of leased equipment	(18,359)	(19,836)
Proceeds from sales of premises and equipment		1,498
Proceeds from sales of leased equipment	6,672	11,108
Capital improvements on other real estate owned	(53)	(2,304)
Proceeds from sale of other real estate owned	12,791	28,398
Proceeds from sale of other real estate owned related to FDIC-assisted transactions	7,535	29,008
Principal paid on lease investments	(1,127)	(1,878)
Life insurance death benefit	2,083
Net proceeds from FDIC related covered assets	11,347	79,247
Net cash provided by investing activities	139,037	554,344
Cash Flows From Financing Activities
Net decrease in deposits	(244,011)	(168,260)
Net increase in short-term borrowings	19,998	69,659
Proceeds from long-term borrowings	5,457	5,740
Principal paid on long-term borrowings	(59,079)	(153,206)
Redemption of junior subordinated notes issued to capital trusts		(6,186)
Repurchase of preferred stock	0	(197,518)
Treasury stock transactions, net	(1,653)	(260)
Stock options exercised	1,014	154
Excess tax benefits from share-based payment arrangements	(402)
Dividends paid on preferred stock		(3,239)
Dividends paid on common stock	(17,514)	(1,627)
Net cash used in financing activities	(296,190)	(454,743)
Net (decrease) increase in cash and cash equivalents	(30,826)	212,062
Cash and cash equivalents:
Beginning of period	287,543	244,565
End of period	256,717	456,627
Cash payments for:
Interest paid to depositors and other borrowed funds	20,913	36,156
Net income tax payments, net	35,141	4,230
Supplemental Schedule of Noncash Investing Activities:
Investment securities available for sale purchased not settled	1,797	3,919
Transfer of investment securities available for sale to investment securities held to maturity	656,617	0
Loans transferred to other real estate owned	6,060	2,724
Loans transferred to other real estate owned related to FDIC-assisted transactions	11,580	17,923
Loans transferred to repossessed vehicles	606	607
Operating leases rewritten as direct finance leases included as loans	$ 6,541	$ 7,593

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Earnings Per Common Share

9 Months Ended

Sep. 30, 2013

Accounting Policies [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 September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Distributed earnings allocated to common stock	$	6,636	$	548	$	17,653	$	1,643
Undistributed earnings	17,764		22,585		56,946		64,719
Net income	24,400		23,133		74,599		66,362
Less: preferred stock dividends and discount accretion	—		—		—		3,269
Net income available to common stockholders	24,400		23,133		74,599		63,093
Less: earnings allocated to participating securities	1		1		2		2
Earnings allocated to common stockholders	$	24,399	$	23,132	$	74,597	$	63,091
Weighted average shares outstanding for basic earnings per common share	54,565,089		54,346,827		54,471,541		54,226,241
Dilutive effect of equity awards	565,564		209,690		440,811		246,376
Weighted average shares outstanding for diluted earnings per common share	55,130,653		54,556,517		54,912,352		54,472,617
Basic earnings per common share	$	0.45	$	0.43	$	1.37	$	1.16
Diluted earnings per common share	0.44		0.42		1.36		1.16

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Basis of Presentation (Notes)

9 Months Ended

Sep. 30, 2013

Accounting Policies [Abstract]

Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]

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 ended September 30, 2013 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 December 31, 2012 audited financial statements filed on Form 10-K.

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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Investment Securities (Details 2) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013 Security_Position	Dec. 31, 2012 Security_Position
Available for Sale
Less Than 12 Months, Fair Value	$ 373,334
Less Than 12 Months, Unrealized Losses	(5,473)
12 Months or More, Fair Value	49,104
12 Months or More, Unrealized Losses	(469)
Total Fair Value	422,438
Total Unrealized Losses	(5,942)
Held to maturity
Less Than 12 Months, Fair Value	207,613
Less Than 12 Months, Unrealized Losses	(3,481)
Total Fair Value	207,613
Total Unrealized Losses	(3,481)
Total
Less Than 12 Months, Fair Value	580,947	386,350
Less Than 12 Months, Unrealized Losses	(8,954)	(6,189)
12 Months or More, Fair Value	49,104	16,434
12 Months or More, Unrealized Losses	(469)	(166)
Total Fair Value	630,051	402,784
Total Unrealized Losses	9,423	6,355
Number of security positions in the investment portfolio in an unrealized loss position	353	117
States and political subdivisions
Available for Sale
Less Than 12 Months, Fair Value	9,050	57,540
Less Than 12 Months, Unrealized Losses	(201)	(543)
12 Months or More, Fair Value	0	0
12 Months or More, Unrealized Losses	0	0
Total Fair Value	9,050	57,540
Total Unrealized Losses	(201)	(543)
Held to maturity
Less Than 12 Months, Fair Value	207,613
Less Than 12 Months, Unrealized Losses	(3,481)
Total Fair Value	207,613
Total Unrealized Losses	(3,481)
Residential mortgage-backed securities
Available for Sale
Less Than 12 Months, Fair Value	206,562	270,539
Less Than 12 Months, Unrealized Losses	(2,040)	(5,083)
12 Months or More, Fair Value	49,104	16,434
12 Months or More, Unrealized Losses	(469)	(166)
Total Fair Value	255,666	286,973
Total Unrealized Losses	(2,509)	(5,249)
Corporate bonds
Available for Sale
Less Than 12 Months, Fair Value	147,181	58,241
Less Than 12 Months, Unrealized Losses	(3,199)	(553)
12 Months or More, Fair Value	0	0
12 Months or More, Unrealized Losses	0	0
Total Fair Value	147,181	58,241
Total Unrealized Losses	(3,199)	(553)
Equity securities
Available for Sale
Less Than 12 Months, Fair Value	10,541	30
Less Than 12 Months, Unrealized Losses	(33)	(10)
12 Months or More, Fair Value	0	0
12 Months or More, Unrealized Losses	0	0
Total Fair Value	10,541	30
Total Unrealized Losses	$ (33)	$ (10)

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Investment Securities (Tables)

9 Months Ended

Sep. 30, 2013

Investments Securities [Abstract]

Summary investment holdings

Carrying amounts and fair values of investment securities were as follows (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
September 30, 2013
Available for Sale
U.S. Government sponsored agencies and enterprises	$	50,678	$	1,849	$	—		$	52,527
States and political subdivisions	19,461		52		(201		)	19,312
Residential mortgage-backed securities	685,126		8,659		(2,509		)	691,276
Commercial mortgage-backed securities	50,944		2,502		—			53,446
Corporate bonds	265,293		927		(3,199		)	263,021
Equity securities	10,574		—		(33		)	10,541
	1,082,076		13,989		(5,942		)	1,090,123
Held to Maturity
States and political subdivisions	941,273		8,517		(3,481		)	946,309
Residential mortgage-backed securities	252,271		14,168		—			266,439
	1,193,544		22,685		(3,481		)	1,212,748
Total	$	2,275,620	$	36,674	$	(9,423	)	$	2,302,871
December 31, 2012
Available for Sale
U.S. Government sponsored agencies and enterprises	$	38,605	$	2,710	$	—		$	41,315
States and political subdivisions	679,991		45,571		(543		)	725,019
Residential mortgage-backed securities	930,413		14,038		(5,249		)	939,202
Commercial mortgage-backed securities	51,100		3,026		—			54,126
Corporate bonds	97,014		213		(553		)	96,674
Equity securities	11,398		447		(10		)	11,835
	1,808,521		66,005		(6,355		)	1,868,171
Held to Maturity
States and political subdivisions	237,563		21,039		—			258,602
Residential mortgage-backed securities	255,858		21,221		—			277,079
	493,421		42,260		—			535,681
Total	$	2,301,942	$	108,265	$	(6,355	)	$	2,403,852

Unrealized losses on investment securities and the fair value of the related securities

Unrealized losses on investment securities and the fair value of the related securities at December 31, 2012 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	$	57,540	$	(543	)	$	—	$	—		$	57,540	$	(543	)
Residential mortgage-backed securities	270,539		(5,083		)	16,434		(166		)	286,973		(5,249		)
Corporate bonds	58,241		(553		)	—		—			58,241		(553		)
Equity securities	30		(10		)	—		—			30		(10		)
Totals	$	386,350	$	(6,189	)	$	16,434	$	(166	)	$	402,784	$	(6,355	)

Unrealized losses on investment securities and the fair value of the related securities at September 30, 2013 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	$	9,050	$	(201	)	$	—	$	—		$	9,050	$	(201	)
Residential mortgage-backed securities	206,562		(2,040		)	49,104		(469		)	255,666		(2,509		)
Corporate bonds	147,181		(3,199		)	—		—			147,181		(3,199		)
Equity securities	10,541		(33		)	—		—			10,541		(33		)
	373,334		(5,473		)	49,104		(469		)	422,438		(5,942		)
Held to Maturity
States and political subdivisions	207,613		(3,481		)	—		—			207,613		(3,481		)
	207,613		(3,481		)	—		—			207,613		(3,481		)
Totals	$	580,947	$	(8,954	)	$	49,104	$	(469	)	$	630,051	$	(9,423	)

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,
	2013		2012			2013			2012
Realized gains	$	1	$	282		$	15		$	472
Realized losses	—		(1		)	(1		)	(4		)
Impairment charges	—		—			—			(224		)
Net gains (losses)	$	1	$	281		$	14		$	244

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, 2013 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	$	—	$	—
Due after one year through five years	319,032		318,598
Due after five years through ten years	7,695		7,711
Due after ten years	8,705		8,551
Equity securities	10,574		10,541
Residential and commercial mortgage-backed securities	736,070		744,722
	1,082,076		1,090,123
Held to maturity:
Due in one year or less	28,222		28,221
Due after one year through five years	245,125		245,545
Due after five years through ten years	122,547		122,533
Due after ten years	545,379		550,010
Residential mortgage-backed securities	252,271		266,439
	1,193,544		1,212,748
Total	$	2,275,620	$	2,302,871

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Short-Term Borrowings (Tables)

9 Months Ended

Sep. 30, 2013

Short-term Debt [Abstract]

Summary of short-term borrowings

Short-term borrowings were as follows as of September 30, 2013 and December 31, 2012 (dollars in thousands):

	September 30, 2013				December 31, 2012
	Weighted Average				Weighted Average
	Cost		Amount		Cost		Amount
Customer repurchase agreements	0.22	%	$	240,600	0.23	%	$	208,242
Federal Home Loan Bank advances	—	%	—		3.58	%	12,360
	0.22	%	$	240,600	0.42	%	$	220,602

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Derivative Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2013

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, 2013 and December 31, 2012 (in thousands):

	Asset Derivatives								Liability Derivatives
	September 30, 2013				December 31, 2012				September 30, 2013					December 31, 2012
	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)	$	—	$	—	$	—	$	—	$	248	$	(26	)	$	3,707	$	(94	)
Stand-alone derivative instruments (2)
Interest rate swap contracts	570,472		17,813		460,956		27,740		571,445		(17,875		)	462,012		(27,832		)
Interest rate options contracts	84,095		307		70,346		157		84,095		(307		)	70,346		(157		)
Foreign exchange contracts	16,112		912		20,033		1,062		15,536		(818		)	19,337		(961		)
Mortgage banking derivatives	4,794		80		11,400		137		2,603		(34		)	4,000		(11		)
Total non-hedging derivative instruments	675,473		19,112		562,735		29,096		673,679		(19,034		)	555,695		(28,961		)
Total	$	675,473	$	19,112	$	562,735	$	29,096	$	673,927	$	(19,060	)	$	559,402	$	(29,055	)

(1) Hedged fixed-rate commercial real estate loans

(2) These portfolio swaps 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 the other 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,
	2013			2012		2013			2012
Derivative instruments designated as hedges of fair value:
Interest rate swap contracts	$	(1	)	$	—	$	9		$	(36	)
Stand-alone derivative instruments
Interest rate swap contracts	7			6		30			19
Interest rate options contracts	—			—		—			—
Foreign exchange contracts	(12		)	14		(7		)	44
Mortgage banking derivatives	(16		)	9		(80		)	79
Total non-hedging derivative instruments	(21		)	29		(57		)	142
Total	$	(22	)	$	29	$	(48	)	$	106

Schedule of Derivative Instruments [Table Text Block]

	Financial Assets									Financial Liabilities
	Net Amount Recognized		Financial Instruments			Collateral		Net Amount		Net Amount Recognized		Financial Instruments			Collateral			Net Amount
Derivatives:
Counterparty A	$	440	$	(440	)	$	—	$	—	$	12,976	$	(440	)	$	(12,536	)	$	—
Counterparty B	1,090		(551		)	—		539		551		(551		)	—			—
Counterparty C	1,570		(1,570		)	—		—		1,949		(1,570		)	(379		)	—
Other counterparties	450		(1		)	—		449		46		(1		)	—			45
Total derivatives	3,550		(2,562		)	—		988		15,522		(2,562		)	(12,915		)	45
Repurchase agreements	—		—			—		—		240,600		—			(240,600		)	—
Total	$	3,550	$	(2,562	)	$	—	$	988	$	256,122	$	(2,562	)	$	(253,515	)	$	45

	Financial Assets									Financial Liabilities
	Net Amount Recognized		Financial Instruments			Collateral		Net Amount		Net Amount Recognized		Financial Instruments			Collateral			Net Amount
Derivatives:
Counterparty A	$	68	$	(68	)	$	—	$	—	$	25,497	$	(68	)	$	(25,429	)	$	—
Counterparty B	84		(84		)	—		—		633		(84		)	(549		)	—
Counterparty C	36		(36		)	—		—		2,305		(36		)	(2,269		)	—
Other counterparties	48		(42		)	—		6		395		(42		)	(298		)	55
Total derivatives	236		(230		)	—		6		28,830		(230		)	(28,545		)	55
Repurchase agreements	—		—			—		—		208,242		—			(208,242		)	—
Total	$	236	$	(230	)	$	—	$	6	$	237,072	$	(230	)	$	(236,787	)	$	55

Information about the Company's financial instruments that are eligible for offset in the consolidated balance sheet as of December 31, 2012 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 swaps, caps and floors	$	192	$	—	$	192	$	27,890	$	—	$	27,890
Foreign currency forward contracts	43		—		43		929		—		929
Mortgage banking derivatives	1		—		1		11		—		11
Total derivatives	236		—		236		28,830		—		28,830
Repurchase agreements	—		—		—		208,242		—		208,242
Total	$	236	$	—	$	236	$	237,072	$	—	$	237,072

Information about the Company's financial instruments that are eligible for offset in the consolidated balance sheet as of September 30, 2013 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 swaps, caps and floors	$	3,483	$	—	$	3,483	$	14,724	$	—	$	14,724
Foreign currency forward contracts	67		—		67		764		—		764
Mortgage banking derivatives	—		—		—		34		—		34
Total derivatives	3,550		—		3,550		15,522		—		15,522
Repurchase agreements	—		—		—		240,600		—		240,600
Total	$	3,550	$	—	$	3,550	$	256,122	$	—	$	256,122

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Junior Subordinated Notes Issued to Capital Trusts (Details) (USD $) In Thousands, unless otherwise specified			3 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013 Junior Subordinated Notes Maximum	Sep. 30, 2013 Coal City Capital Trust I Junior Subordinated Notes	Sep. 30, 2013 MB Financial Capital Trust II Junior Subordinated Notes	Sep. 30, 2013 MB Financial Capital Trust III Junior Subordinated Notes	Sep. 30, 2013 MB Financial Capital Trust IV Junior Subordinated Notes	Sep. 30, 2013 MB Financial Capital Trust V Junior Subordinated Notes	Sep. 30, 2013 MB Financial Capital Trust VI Junior Subordinated Notes	Sep. 30, 2013 FOBB Statutory Trust III Junior Subordinated Notes
Outstanding junior subordinated notes
Principal balance	$ 152,065	$ 152,065		$ 25,774	$ 36,083	$ 10,310	$ 20,619	$ 30,928	$ 23,196	$ 5,155
Debt Instrument, Basis Spread on Variable Rate				1.80%	1.40%	1.50%	1.52%	1.30%	1.30%	2.80%
Description of annual interest rate basis				3-mo LIBOR	3-mo LIBOR	3-mo LIBOR	3-mo LIBOR	3-mo LIBOR	3-mo LIBOR	3-mo LIBOR
Period for deferment of payment of interest on notes (in years)			5 years

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Loans (Details 8) (USD $)	Sep. 30, 2013		Dec. 31, 2012
Purchased credit-impaired loans and non-credit-impaired loans
Covered loans	$ 273,497,000		$ 449,850,000
Estimated receivable amount from the FDIC under the loss-share agreement	10,049,000
Non covered loans	18,503,000
Outstanding balances on purchased loans from the FDIC	305,000,000		515,700,000
Carrying amount on loans purchased from the FDIC	292,000,000		471,600,000
Purchased Credit Impaired Loans Receivable
Purchased credit-impaired loans and non-credit-impaired loans
Covered loans	130,589,000
Estimated receivable amount from the FDIC under the loss-share agreement	36,000	[1]
Non covered loans	4,446,000
Purchased Non-Credit Impaired Loans Receivable
Purchased credit-impaired loans and non-credit-impaired loans
Covered loans	142,908,000
Estimated receivable amount from the FDIC under the loss-share agreement	10,013,000	[1]
Non covered loans	14,057,000
Commercial related
Purchased credit-impaired loans and non-credit-impaired loans
Covered loans	16,868,000
Non covered loans	14,797,000
Commercial related | Purchased Credit Impaired Loans Receivable
Purchased credit-impaired loans and non-credit-impaired loans
Reimbursable Amount Covered Other Real Estate Owned	1,000,000
Covered loans	11,130,000	[2]
Non covered loans	4,357,000	[3]
Commercial related | Purchased Non-Credit Impaired Loans Receivable
Purchased credit-impaired loans and non-credit-impaired loans
Covered loans	5,738,000	[2]
Non covered loans	10,440,000	[3]
Commercial loans
Purchased credit-impaired loans and non-credit-impaired loans
Covered loans	3,984,000
Commercial loans | Purchased Credit Impaired Loans Receivable
Purchased credit-impaired loans and non-credit-impaired loans
Covered loans	457,000
Commercial loans | Purchased Non-Credit Impaired Loans Receivable
Purchased credit-impaired loans and non-credit-impaired loans
Covered loans	3,527,000
Commercial real estate
Purchased credit-impaired loans and non-credit-impaired loans
Covered loans	159,799,000
Commercial real estate | Purchased Credit Impaired Loans Receivable
Purchased credit-impaired loans and non-credit-impaired loans
Covered loans	62,576,000
Commercial real estate | Purchased Non-Credit Impaired Loans Receivable
Purchased credit-impaired loans and non-credit-impaired loans
Covered loans	97,223,000
Construction real estate
Purchased credit-impaired loans and non-credit-impaired loans
Covered loans	61,446,000
Construction real estate | Purchased Credit Impaired Loans Receivable
Purchased credit-impaired loans and non-credit-impaired loans
Covered loans	53,444,000
Construction real estate | Purchased Non-Credit Impaired Loans Receivable
Purchased credit-impaired loans and non-credit-impaired loans
Covered loans	8,002,000
Other
Purchased credit-impaired loans and non-credit-impaired loans
Covered loans	31,400,000
Non covered loans	3,706,000
Other | Purchased Credit Impaired Loans Receivable
Purchased credit-impaired loans and non-credit-impaired loans
Covered loans	2,982,000
Non covered loans	89,000
Other | Purchased Non-Credit Impaired Loans Receivable
Purchased credit-impaired loans and non-credit-impaired loans
Covered loans	28,418,000
Non covered loans	$ 3,617,000

[1] Estimated reimbursable amounts from the FDIC under the loss-share agreement exclude $1.0 million in reimbursable amounts related to covered other real estate owned.

[2] Covered commercial related loans include commercial, commercial real estate and construction real estate loans acquired in connection with the Heritage and Benchmark FDIC-assisted transactions.

[3] Non covered commercial related loans include commercial, commercial real estate and construction real estate for InBank.

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Loans (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Dec. 31, 2012
Loans individually evaluated for impairment by class of loans
Total loans, excluding covered loans	$ 5,313,235	$ 5,313,235	$ 5,317,080
Unpaid Principal Balance	140,158	140,158	144,992
Recorded Investment	123,623	123,623	122,264
Partial Charge-Offs	16,535	16,535	22,728
Allowance for Loan Losses Allocated	16,192	16,192	16,941
Impaired Financing Receivable, Average Recorded Investment	140,623	136,004	119,252
Interest Income Recognized	238	404	376
Restructured loans	15,341	15,341
Performing
Loans individually evaluated for impairment by class of loans
Restructured loans	29,900	29,900	21,300
Non-performing
Loans individually evaluated for impairment by class of loans
Restructured loans	22,300	22,300	28,400
Commercial loans
Loans individually evaluated for impairment by class of loans
Total loans, excluding covered loans	1,169,009	1,169,009	1,220,472
Restructured loans	1,251	1,251
Commercial loans collateralized by assignment of lease payments
Loans individually evaluated for impairment by class of loans
Total loans, excluding covered loans	1,468,814	1,468,814	1,303,020
Restructured loans	0	0
Commercial real estate
Loans individually evaluated for impairment by class of loans
Total loans, excluding covered loans	1,638,368	1,638,368	1,761,832
Healthcare
Loans individually evaluated for impairment by class of loans
Total loans, excluding covered loans	215,823	215,823	195,277
Restructured loans	3,164	3,164
Industrial
Loans individually evaluated for impairment by class of loans
Total loans, excluding covered loans	375,596	375,596	411,485
Restructured loans	2,570	2,570
Multifamily
Loans individually evaluated for impairment by class of loans
Total loans, excluding covered loans	321,690	321,690	358,351
Restructured loans	1,224	1,224
Retail
Loans individually evaluated for impairment by class of loans
Total loans, excluding covered loans	353,707	353,707	392,682
Restructured loans	862	862
Office
Loans individually evaluated for impairment by class of loans
Total loans, excluding covered loans	142,348	142,348	188,812
Restructured loans	0	0
Other
Loans individually evaluated for impairment by class of loans
Total loans, excluding covered loans	229,204	229,204	215,225
Restructured loans	84	84
Residential real estate
Loans individually evaluated for impairment by class of loans
Total loans, excluding covered loans	311,256	311,256	314,359
Restructured loans	2,004	2,004
Residential real estate | Performing
Loans individually evaluated for impairment by class of loans
Total loans, excluding covered loans	298,215	298,215	303,416
Residential real estate | Non-performing
Loans individually evaluated for impairment by class of loans
Total loans, excluding covered loans	13,041	13,041	10,943
Construction real estate
Loans individually evaluated for impairment by class of loans
Total loans, excluding covered loans	136,146	136,146	110,261
Restructured loans	0	0
Indirect vehicle
Loans individually evaluated for impairment by class of loans
Total loans, excluding covered loans	257,740	257,740	208,633
Restructured loans	127	127
Indirect vehicle | Performing
Loans individually evaluated for impairment by class of loans
Total loans, excluding covered loans	256,224	256,224	207,139
Indirect vehicle | Non-performing
Loans individually evaluated for impairment by class of loans
Total loans, excluding covered loans	1,516	1,516	1,494
Home equity lines
Loans individually evaluated for impairment by class of loans
Total loans, excluding covered loans	274,484	274,484	305,186
Restructured loans	4,055	4,055
Home equity lines | Performing
Loans individually evaluated for impairment by class of loans
Total loans, excluding covered loans	263,666	263,666	286,700
Home equity lines | Non-performing
Loans individually evaluated for impairment by class of loans
Total loans, excluding covered loans	10,818	10,818	18,486
Other consumer
Loans individually evaluated for impairment by class of loans
Total loans, excluding covered loans	57,418	57,418	93,317
Restructured loans	0	0
Other consumer | Performing
Loans individually evaluated for impairment by class of loans
Total loans, excluding covered loans	57,406	57,406	93,307
Other consumer | Non-performing
Loans individually evaluated for impairment by class of loans
Total loans, excluding covered loans	12	12	10
Other loans
Loans individually evaluated for impairment by class of loans
Total loans, excluding covered loans	900,898	900,898	921,495
Other loans | Performing
Loans individually evaluated for impairment by class of loans
Total loans, excluding covered loans	875,511	875,511	890,562
Other loans | Non-performing
Loans individually evaluated for impairment by class of loans
Total loans, excluding covered loans	25,387	25,387	30,933
Impaired financing receivable with no allowance | Commercial loans
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	6,236	6,236	10,993
Recorded Investment	5,364	5,364	9,505
Partial Charge-Offs	872	872	1,488
Allowance for Loan Losses Allocated	0	0	0
Impaired Financing Receivable, Average Recorded Investment	6,509	7,378	14,089
Interest Income Recognized	0	0	105
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	681	681	390
Recorded Investment	681	681	390
Partial Charge-Offs	0	0	0
Allowance for Loan Losses Allocated	0	0	0
Impaired Financing Receivable, Average Recorded Investment	666	256	278
Interest Income Recognized	6	6	9
Impaired financing receivable with no allowance | Healthcare
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	0	0	10,943
Recorded Investment	0	0	3,238
Partial Charge-Offs	0	0	7,705
Allowance for Loan Losses Allocated	0	0	0
Impaired Financing Receivable, Average Recorded Investment	0	3,608	2,751
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	7,547	7,547	16,891
Recorded Investment	6,927	6,927	14,940
Partial Charge-Offs	620	620	1,951
Allowance for Loan Losses Allocated	0	0	0
Impaired Financing Receivable, Average Recorded Investment	7,902	9,316	16,374
Interest Income Recognized	0	0	29
Impaired financing receivable with no allowance | Multifamily
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	546	546	800
Recorded Investment	546	546	800
Partial Charge-Offs	0	0	0
Allowance for Loan Losses Allocated	0	0	0
Impaired Financing Receivable, Average Recorded Investment	665	739	1,340
Interest Income Recognized	0	0	14
Impaired financing receivable with no allowance | Retail
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	3,002	3,002	5,372
Recorded Investment	3,002	3,002	4,917
Partial Charge-Offs	0	0	455
Allowance for Loan Losses Allocated	0	0	0
Impaired Financing Receivable, Average Recorded Investment	3,233	3,123	9,241
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	685	685	1,568
Recorded Investment	527	527	1,568
Partial Charge-Offs	158	158	0
Allowance for Loan Losses Allocated	0	0	0
Impaired Financing Receivable, Average Recorded Investment	705	986	1,151
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	3,149	3,149	4,860
Recorded Investment	3,139	3,139	4,860
Partial Charge-Offs	10	10	0
Allowance for Loan Losses Allocated	0	0	0
Impaired Financing Receivable, Average Recorded Investment	3,353	4,785	6,005
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	4,174	4,174	3,097
Recorded Investment	3,788	3,788	2,711
Partial Charge-Offs	386	386	386
Allowance for Loan Losses Allocated	0	0	0
Impaired Financing Receivable, Average Recorded Investment	4,082	2,835	6,476
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
Impaired Financing Receivable, Average Recorded Investment	0	0	577
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
Impaired Financing Receivable, 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	577	577	2,558
Recorded Investment	577	577	2,558
Partial Charge-Offs	0	0	0
Allowance for Loan Losses Allocated	0	0	0
Impaired Financing Receivable, Average Recorded Investment	577	872	8,976
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
Impaired Financing Receivable, Average Recorded Investment	0	0	182
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	14,472	14,472	14,484
Recorded Investment	14,472	14,472	14,381
Partial Charge-Offs	0	0	103
Allowance for Loan Losses Allocated	4,389	4,389	3,620
Impaired Financing Receivable, Average Recorded Investment	15,680	14,839	8,455
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	1,649	1,649	885
Recorded Investment	1,649	1,649	885
Partial Charge-Offs	0	0	0
Allowance for Loan Losses Allocated	285	285	188
Impaired Financing Receivable, Average Recorded Investment	1,659	1,347	1,130
Interest Income Recognized	109	158	73
Impaired financing receivable with allowance | Healthcare
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	10,868	10,868	0
Recorded Investment	3,164	3,164	0
Partial Charge-Offs	7,704	7,704	0
Allowance for Loan Losses Allocated	495	495	0
Impaired Financing Receivable, Average Recorded Investment	10,869	7,302	3,901
Interest Income Recognized	0	0	0
Impaired financing receivable with allowance | Industrial
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	2,826	2,826	5,525
Recorded Investment	2,826	2,826	4,238
Partial Charge-Offs	0	0	1,287
Allowance for Loan Losses Allocated	1,047	1,047	1,255
Impaired Financing Receivable, Average Recorded Investment	3,078	3,611	2,443
Interest Income Recognized	0	0	0
Impaired financing receivable with allowance | Multifamily
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	6,334	6,334	8,233
Recorded Investment	5,944	5,944	7,249
Partial Charge-Offs	390	390	984
Allowance for Loan Losses Allocated	1,876	1,876	2,284
Impaired Financing Receivable, Average Recorded Investment	6,408	6,642	5,847
Interest Income Recognized	115	224	130
Impaired financing receivable with allowance | Retail
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	15,323	15,323	23,144
Recorded Investment	13,031	13,031	17,257
Partial Charge-Offs	2,292	2,292	5,887
Allowance for Loan Losses Allocated	1,855	1,855	3,604
Impaired Financing Receivable, Average Recorded Investment	13,778	13,572	10,058
Interest Income Recognized	0	0	0
Impaired financing receivable with allowance | Office
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	3,607	3,607	1,706
Recorded Investment	3,214	3,214	1,695
Partial Charge-Offs	393	393	11
Allowance for Loan Losses Allocated	1,047	1,047	522
Impaired Financing Receivable, Average Recorded Investment	3,735	4,391	1,904
Interest Income Recognized	0	0	0
Impaired financing receivable with allowance | Other
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	18,493	18,493	4,661
Recorded Investment	18,280	18,280	4,577
Partial Charge-Offs	213	213	84
Allowance for Loan Losses Allocated	1,144	1,144	1,263
Impaired Financing Receivable, Average Recorded Investment	19,790	11,104	6,082
Interest Income Recognized	8	16	16
Impaired financing receivable with allowance | Residential real estate
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance	12,690	12,690	10,565
Recorded Investment	12,063	12,063	10,565
Partial Charge-Offs	627	627	0
Allowance for Loan Losses Allocated	3,033	3,033	2,858
Impaired Financing Receivable, Average Recorded Investment	12,494	12,965	3,417
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	3,990	3,990	4,552
Recorded Investment	1,622	1,622	2,167
Partial Charge-Offs	2,368	2,368	2,385
Allowance for Loan Losses Allocated	240	240	497
Impaired Financing Receivable, Average Recorded Investment	1,736	1,938	3,775
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	138	138	0
Recorded Investment	106	106	0
Partial Charge-Offs	32	32	0
Allowance for Loan Losses Allocated	0	0	0
Impaired Financing Receivable, Average Recorded Investment	146	54	0
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	23,171	23,171	13,765
Recorded Investment	22,701	22,701	13,763
Partial Charge-Offs	470	470	2
Allowance for Loan Losses Allocated	781	781	850
Impaired Financing Receivable, Average Recorded Investment	23,558	24,341	4,800
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
Impaired Financing Receivable, Average Recorded Investment	0	0	0
Interest Income Recognized	$ 0	$ 0	$ 0

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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Securities held to maturity, at amortized cost, fair value (in dollars)	$ 1,212,748	$ 535,681
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized shares	70,000,000	70,000,000
Common stock, issued shares	55,141,834	54,955,284
Treasury stock, shares	180,296	170,567

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Loans

9 Months Ended

Sep. 30, 2013

Receivables [Abstract]

Loans

Loans

Loans consist of the following at (in thousands):

	September 30, 2013		December 31, 2012
Commercial loans	$	1,169,009	$	1,220,472
Commercial loans collateralized by assignment of lease payments	1,468,814		1,303,020
Commercial real estate	1,638,368		1,761,832
Residential real estate	311,256		314,359
Construction real estate	136,146		110,261
Indirect vehicle	257,740		208,633
Home equity	274,484		305,186
Other consumer loans	57,418		93,317
Gross loans, excluding covered loans	5,313,235		5,317,080
Covered loans	273,497		449,850
Total loans(1)	$	5,586,732	$	5,766,930

 (1) Gross loan balances at September 30, 2013 and December 31, 2012 are net of unearned income, including net deferred loan fees of $1.5 million and $1.1 million, respectively.

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. 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. These policies and procedures are reviewed and approved by the Board of Directors 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.

Lease Loans. The Company makes lease loans to 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 polices 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 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 motorcycle loans, using a matrix-based credit analysis as part of the underwriting process. Each loan type has a separate matrix which consists of 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.

The following table presents the contractual aging of the recorded investment in past due loans by class of loans as of September 30, 2013 and December 31, 2012 (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, 2013
Commercial	$	1,158,326	$	2,392	$	2,580	$	5,711	$	10,683	$	1,169,009
Commercial collateralized by assignment of lease payments	1,455,296		10,761		1,816		941		13,518		1,468,814
Commercial real estate
Healthcare	212,659		—		—		3,164		3,164		215,823
Industrial	371,940		161		2,101		1,394		3,656		375,596
Multifamily	316,495		2,808		—		2,387		5,195		321,690
Retail	344,390		236		449		8,632		9,317		353,707
Office	139,251		412		579		2,106		3,097		142,348
Other	223,385		3,443		229		2,147		5,819		229,204
Residential real estate	298,878		1,103		1,059		10,216		12,378		311,256
Construction real estate	133,742		—		89		2,315		2,404		136,146
Indirect vehicle	255,177		1,638		687		238		2,563		257,740
Home equity	260,055		4,505		2,911		7,013		14,429		274,484
Other consumer	57,357		54		1		6		61		57,418
Gross loans, excluding covered loans	5,226,951		27,513		12,501		46,270		86,284		5,313,235
Covered loans	138,876		12,091		5,681		116,849		134,621		273,497
Total loans (1)	$	5,365,827	$	39,604	$	18,182	$	163,119	$	220,905	$	5,586,732
Nonperforming loan aging	$	53,271	$	3,596	$	6,111	$	39,474	$	49,181	$	102,452
Non-covered loans related to FDIC transactions (2)	$	11,339	$	222	$	146	$	6,796	$	7,164	$	18,503
December 31, 2012
Commercial	$	1,215,957	$	639	$	754	$	3,122	$	4,515	$	1,220,472
Commercial collateralized by assignment of lease payments	1,288,341		11,252		2,847		580		14,679		1,303,020
Commercial real estate
Healthcare	192,039		—		—		3,238		3,238		195,277
Industrial	402,813		548		424		7,700		8,672		411,485
Multifamily	353,966		1,282		—		3,103		4,385		358,351
Retail	375,900		6,933		518		9,331		16,782		392,682
Office	186,665		742		280		1,125		2,147		188,812
Other	210,456		851		1,837		2,081		4,769		215,225
Residential real estate	306,927		382		1,248		5,802		7,432		314,359
Construction real estate	106,158		1,139		97		2,867		4,103		110,261
Indirect vehicle	206,126		1,588		498		421		2,507		208,633
Home equity	291,737		3,557		1,888		8,004		13,449		305,186
Other consumer	93,266		47		—		4		51		93,317
Gross loans, excluding covered loans	5,230,351		28,960		10,391		47,378		86,729		5,317,080
Covered loans	301,260		5,831		7,478		135,281		148,590		449,850
Total loans (1)	$	5,531,611	$	34,791	$	17,869	$	182,659	$	235,319	$	5,766,930
Nonperforming loan aging	$	69,836	$	3,171	$	3,718	$	40,261	$	47,150	$	116,986
Non-covered loans related to FDIC transactions (2)	$	12,752	$	312	$	1,542	$	7,115	$	8,969	$	21,721

(1)          Includes loans related to the InBank FDIC-assisted transaction completed by MB Financial Bank in 2009.

(2)          Loans related to the InBank FDIC-assisted transaction completed by MB Financial Bank in 2009.

The following table presents the recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing by class of loans as of September 30, 2013 and December 31, 2012 (in thousands):

	September 30, 2013				December 31, 2012
			Loans past due				Loans past due
	Nonaccrual		90 days or more and still accruing		Nonaccrual		90 days or more and still accruing
Commercial	$	19,948	$	—	$	23,886	$	229
Commercial collateralized by assignment of lease payments	2,130		215		1,180		222
Commercial real estate:
Healthcare	3,164		—		3,238		—
Industrial	9,754		—		19,179		147
Multifamily	5,087		195		7,225		—
Office	10,916		—		3,263		—
Retail	3,740		—		17,019		—
Other	21,420		—		9,437		—
Residential real estate	13,041		—		10,943		—
Construction real estate	496		—		1,028		—
Indirect vehicle	1,516		—		1,494		—
Home equity	10,818		—		17,486		1,000
Other consumer	12		—		9		1
Total	$	102,042	$	410	$	115,387	$	1,599

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 at least annually and any time the situation warrants.

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 as of September 30, 2013 and December 31, 2012 (in thousands):

	Pass		Special Mention		Substandard		Doubtful		Total
September 30, 2013
Commercial	$	1,091,129	$	17,720	$	60,160	$	—	$	1,169,009
Commercial collateralized by assignment of lease payments	1,457,577		4,814		6,423		—		1,468,814
Commercial real estate
Healthcare	188,946		21,556		2,157		3,164		215,823
Industrial	335,274		7,384		32,938		—		375,596
Multifamily	306,691		—		14,999		—		321,690
Retail	324,558		10,373		18,776		—		353,707
Office	132,490		2,732		7,126		—		142,348
Other	201,971		3,088		24,145		—		229,204
Construction real estate	126,902		6,264		2,980		—		136,146
Total	$	4,165,538	$	73,931	$	169,704	$	3,164	$	4,412,337
December 31, 2012
Commercial	$	1,136,294	$	33,068	$	50,895	$	215	$	1,220,472
Commercial collateralized by assignment of lease payments	1,292,241		3,322		7,457		—		1,303,020
Commercial real estate
Healthcare	170,265		21,774		—		3,238		195,277
Industrial	355,218		15,243		41,024		—		411,485
Multifamily	318,991		25,297		14,063		—		358,351
Retail	340,919		25,096		26,667		—		392,682
Office	159,056		7,120		22,636		—		188,812
Other	193,824		2,553		18,848		—		215,225
Construction real estate	97,724		552		11,985		—		110,261
Total	$	4,064,532	$	134,025	$	193,575	$	3,453	$	4,395,585

Approximately $76.5 million and $85.5 million of the substandard and doubtful loans were non-performing as of September 30, 2013 and December 31, 2012, respectively.

For residential real estate, home equity, indirect vehicle and other consumer loan classes, the Company also 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 as of September 30, 2013 and December 31, 2012 (in thousands):

	Performing		Non-performing		Total
September 30, 2013
Residential real estate	$	298,215	$	13,041	$	311,256
Indirect vehicle	256,224		1,516		257,740
Home equity	263,666		10,818		274,484
Other consumer	57,406		12		57,418
Total	$	875,511	$	25,387	$	900,898
December 31, 2012
Residential real estate	$	303,416	$	10,943	$	314,359
Indirect vehicle	207,139		1,494		208,633
Home equity	286,700		18,486		305,186
Other consumer	93,307		10		93,317
Total	$	890,562	$	30,933	$	921,495

The following tables present loans individually evaluated for impairment by class of loans as of September 30, 2013 and December 31, 2012 (in thousands):

	September 30, 2013
									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	$	6,236	$	5,364	$	872	$	—	$	6,509	$	—	$	7,378	$	—
Commercial collateralized by assignment of lease payments	681		681		—		—		666		6		256		6
Commercial real estate:
Healthcare	—		—		—		—		—		—		3,608		—
Industrial	7,547		6,927		620		—		7,902		—		9,316		—
Multifamily	546		546		—		—		665		—		739		—
Retail	3,002		3,002		—		—		3,233		—		3,123		—
Office	685		527		158		—		705		—		986		—
Other	3,149		3,139		10		—		3,353		—		4,785		—
Residential real estate	4,174		3,788		386		—		4,082		—		2,835		—
Construction real estate	—		—		—		—		—		—		—		—
Indirect vehicle	—		—		—		—		—		—		—		—
Home equity	577		577		—		—		577		—		872		—
Other consumer	—		—		—		—		—		—		—		—
With an allowance recorded:
Commercial	14,472		14,472		—		4,389		15,680		—		14,839		—
Commercial collateralized by assignment of lease payments	1,649		1,649		—		285		1,659		109		1,347		158
Commercial real estate:
Healthcare	10,868		3,164		7,704		495		10,869		—		7,302		—
Industrial	2,826		2,826		—		1,047		3,078		—		3,611		—
Multifamily	6,334		5,944		390		1,876		6,408		115		6,642		224
Retail	15,323		13,031		2,292		1,855		13,778		—		13,572		—
Office	3,607		3,214		393		1,047		3,735		—		4,391		—
Other	18,493		18,280		213		1,144		19,790		8		11,104		16
Residential real estate	12,690		12,063		627		3,033		12,494		—		12,965		—
Construction real estate	3,990		1,622		2,368		240		1,736		—		1,938		—
Indirect vehicle	138		106		32		—		146		—		54		—
Home equity	23,171		22,701		470		781		23,558		—		24,341		—
Other consumer	—		—		—		—		—		—		—		—
Total	$	140,158	$	123,623	$	16,535	$	16,192	$	140,623	$	238	$	136,004	$	404

	December 31, 2012
	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	$	10,993	$	9,505	$	1,488	$	—	$	14,089	$	105
Commercial collateralized by assignment of lease payments	390		390		—		—		278		9
Commercial real estate:
Healthcare	10,943		3,238		7,705		—		2,751		—
Industrial	16,891		14,940		1,951		—		16,374		29
Multifamily	800		800		—		—		1,340		14
Retail	5,372		4,917		455		—		9,241		—
Office	1,568		1,568		—		—		1,151		—
Other	4,860		4,860		—		—		6,005		—
Residential real estate	3,097		2,711		386		—		6,476		—
Construction real estate	—		—		—		—		577		—
Indirect vehicle	—		—		—		—		—		—
Home equity	2,558		2,558		—		—		8,976		—
Other consumer	—		—		—		—		182		—
With an allowance recorded:
Commercial	14,484		14,381		103		3,620		8,455		—
Commercial collateralized by assignment of lease payments	885		885		—		188		1,130		73
Commercial real estate:
Healthcare	—		—		—		—		3,901		—
Industrial	5,525		4,238		1,287		1,255		2,443		—
Multifamily	8,233		7,249		984		2,284		5,847		130
Retail	23,144		17,257		5,887		3,604		10,058		—
Office	1,706		1,695		11		522		1,904		—
Other	4,661		4,577		84		1,263		6,082		16
Residential real estate	10,565		10,565		—		2,858		3,417		—
Construction real estate	4,552		2,167		2,385		497		3,775		—
Indirect vehicle	—		—		—		—		—		—
Home equity	13,765		13,763		2		850		4,800		—
Other consumer	—		—		—		—		—		—
Total	$	144,992	$	122,264	$	22,728	$	16,941	$	119,252	$	376

Impaired loans included accruing restructured loans of $29.9 million and $21.3 million that have been modified and are performing in accordance with those modified terms as of September 30, 2013 and December 31, 2012, respectively.  In addition, impaired loans included $22.3 million and $28.4 million of non-performing, restructured loans as of September 30, 2013 and December 31, 2012, 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 nonperforming) through the calendar year of the restructuring that the historical payment performance has been established. As of September 30, 2013, there were no A/B structures. As of December 31, 2012 there was approximately $3.1 million in recorded investment in relation to one A/B structure. 

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 loss 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 have been restructured during the three months ended September 30, 2013 (dollars in thousands):

	September 30, 2013
	Number of Loans	Pre-Modification Recorded Investment		Post-Modification Recorded Investment		Charge-offs and Specific Reserves
Performing:
Residential real estate	1	$	95	$	95	$	—
Home equity	1	19		19		—
Total	2	$	114	$	114	$	—
Non-Performing:
Commercial real estate:
Healthcare	1	$	3,164	$	3,164	$	496
Multifamily	1	436		436		119
Retail	1	205		205		56
Residential real estate	1	394		394		—
Indirect vehicle	17	113		89		24
Home equity	5	397		397		—
Total	26	$	4,709	$	4,685	$	695

The following table presents loans that have been restructured during the nine months ended September 30, 2013 (dollars in thousands):

	September 30, 2013
	Number of Loans	Pre-Modification Recorded Investment		Post-Modification Recorded Investment		Charge-offs and Specific Reserves
Performing:
Commercial real estate:
Multifamily	1	$	601	$	601	$	—
Residential real estate	5	854		854		—
Home equity	7	723		723		—
Total	13	$	2,178	$	2,178	$	—
Non-Performing:
Commercial	2	$	1,251	$	1,251	$	673
Commercial real estate:
Healthcare	1	3,164		3,164		496
Industrial	4	2,570		2,570		1,425
Multifamily	2	623		623		169
Retail	3	862		862		235
Other	1	84		84		23
Residential real estate	6	1,149		1,149		—
Indirect vehicle	20	127		103		24
Home equity	25	3,333		3,333		—
Total	64	$	13,163	$	13,139	$	3,045

The following table presents loans that have been restructured during the three months ended September 30, 2012 (dollars in thousands):

	September 30, 2012
	Number of Loans	Pre-Modification Recorded Investment		Post-Modification Recorded Investment		Charge-offs and Specific Reserves
Performing:
Home equity	7	$	401	$	325	$	76
Total	7	$	401	$	325	$	76
Non-Performing:
Commercial collateralized by assignment of lease payments	1	$	202	$	202	$	168
Commercial real estate:
Retail	1	202		202		200
Residential real estate	7	173		68		105
Home equity	5	347		232		115
Total	14	$	924	$	704	$	588

The following table presents loans that have been restructured during the nine months ended September 30, 2012 (dollars in thousands):

	September 30, 2012
	Number of Loans	Pre-Modification Recorded Investment		Post-Modification Recorded Investment		Charge-offs and Specific Reserves
Performing:
Commercial real estate:
Multifamily	1	$	155	$	155	$	—
Retail	1	236		236		—
Residential real estate	2	808		808		—
Home equity	38	6,009		5,933		76
Total	42	$	7,208	$	7,132	$	76
Non-Performing:
Commercial	4	$	292	$	292	$	96
Commercial collateralized by assignment of lease payments	1	202		202		168
Commercial real estate:
Multifamily	1	149		149		40
Retail	4	923		923		232
Other	1	157		157		50
Residential real estate	13	637		401		236
Home equity	34	5,324		4,899		425
Total	58	$	7,684	$	7,023	$	1,247

Of the troubled debt restructurings entered into during the past twelve months, none subsequently defaulted during the nine months ended September 30, 2013.  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 tables present the troubled debt restructurings activity during the nine months ended September 30, 2013 (dollars in thousands):

	Performing			Non-performing
Beginning balance	$	21,256		$	28,418
Additions	2,178			13,163
Charge-offs	—			(3,127		)
Principal payments, net	(883		)	(8,008		)
Removals	—			(565		)
Transfer to other real estate owned	—			(206		)
Transfer from/to performing	8,458			1,098
Transfer from/to nonperforming	(1,098		)	(8,458		)
Ending balance	$	29,911		$	22,315

Approximately $8.5 million of non-performing troubled debt restructurings were transferred to performing status. A majority of these loans were identified as non-performing troubled debt restructurings during the first half of 2012 and have performed in accordance with the modified terms. The loans continue to be reported as performing troubled debt restructurings. The loans transferred to nonperforming in the table above were restructured in 2010 and 2011.

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 and the pre-modification recorded investment during the nine months ended September 30, 2013 (dollars in thousands):

	September 30, 2013
	Extended		Extended				Extended
	Maturity,		Maturity, Delay		Extended		Maturity, Delay				Delay in
	Amortization		in Payments and		Maturity and		in Payments and				Payments or
	and Reduction		Reduction of		Reduction of		Reduction of		Extended		Reduction of
	of Interest Rate		Interest Rate		Interest Rate		Amount		Maturity		Interest Rate		Total
Commercial	$	42	$	—	$	1,209	$	—	$	—	$	—	$	1,251
Commercial collateralized by assignment of lease payments	—		—		—		—		—		—		—
Commercial real estate:
Healthcare	—		—		—		3,164		—		—		3,164
Industrial	—		—		—		—		2,570		—		2,570
Multifamily	187		—		—		—		601		436		1,224
Retail	256		205		401		—		—		—		862
Office	—		—		—		—		—		—		—
Other	84		—		—		—		—		—		84
Residential real estate	1,386		—		—		—		—		618		2,004
Construction real estate	—		—		—		—		—		—		—
Indirect vehicle	—		—		—		—		—		127		127
Home equity	1,509		—		708		—		227		1,611		4,055
Other consumer	—		—		—		—		—		—		—
Total	$	3,464	$	205	$	2,318	$	3,164	$	3,398	$	2,792	$	15,341

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, 2013 and 2012 (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, 2013
Allowance for credit losses:
Three Months Ended
Beginning balance	$	27,277		$	8,529	$	60,014		$	8,121	$	8,695		$	1,537	$	8,206		$	1,306	$	1,812		$	125,497
Transfer to (from) allowance for unfunded credit commitments	—			—		—			—		—			—		—			—		—			—
Charge-offs	1,686			—		1,236			713		26			572		437			485		—			5,155
Recoveries	579			—		966			48		420			372		228			74		—			2,687
Provision	(45		)	721		(3,983		)	347		(735		)	293		(152		)	368		(118		)	(3,304		)
Ending balance	$	26,125		$	9,250	$	55,761		$	7,803	$	8,354		$	1,630	$	7,845		$	1,263	$	1,694		$	119,725
Nine Months Ended
Beginning balance	$	24,943		$	7,755	$	61,056		$	6,941	$	11,222		$	1,324	$	9,401		$	1,562	$	4,075		$	128,279
Transfer to (from) allowance for unfunded credit commitments	—			—		—			—		500			—		—			—		(500		)	—
Charge-offs	3,030			—		5,131			2,074		855			1,930		2,547			1,501		—			17,068
Recoveries	1,808			1,131		5,353			461		827			1,111		442			185		—			11,318
Provision	2,404			364		(5,517		)	2,475		(3,340		)	1,125		549			1,017		(1,881		)	(2,804		)
Ending balance	$	26,125		$	9,250	$	55,761		$	7,803	$	8,354		$	1,630	$	7,845		$	1,263	$	1,694		$	119,725
Ending allowance balance attributable to loans:
Individually evaluated for impairment	$	4,389		$	285	$	7,464		$	3,033	$	240		$	—	$	781		$	—	$	657		$	16,849
Collectively evaluated for impairment	20,871			8,965		46,412			4,663		8,114			1,630		7,064			1,263		1,037			100,019
Acquired and accounted for under ASC 310-30 (1)	865			—		1,885			107		—			—		—			—		—			2,857
Total ending allowance balance	$	26,125		$	9,250	$	55,761		$	7,803	$	8,354		$	1,630	$	7,845		$	1,263	$	1,694		$	119,725
Loans:
Individually evaluated for impairment	$	19,836		$	2,330	$	60,600		$	15,851	$	1,622		$	106	$	23,278		$	—	$	—		$	123,623
Collectively evaluated for impairment	1,134,376			1,466,484		1,577,768			291,699		134,524			257,634		251,206			57,418		—			5,171,109
Acquired and accounted for under ASC 310-30 (1)	35,649			—		159,799			5,982		61,446			—		110			29,014		—			292,000
Total ending loans balance	$	1,189,861		$	1,468,814	$	1,798,167		$	313,532	$	197,592		$	257,740	$	274,594		$	86,432	$	—		$	5,586,732

	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, 2012
Allowance for credit losses:
Three Months Ended
Beginning balance	$	20,789	$	7,490		$	68,713		$	3,592	$	10,586		$	1,941	$	7,617	$	1,028	$	7,084		$	128,840
Charge-offs	75		—			2,994			474		71			433		1,209		332		—			5,588
Recoveries	306		111			12,893			8		752			224		303		77		—			14,674
Provision	1,181		(149		)	(12,253		)	738		(393		)	288		370		558		(3,340		)	(13,000		)
Ending balance	$	22,201	$	7,452		$	66,359		$	3,864	$	10,874		$	2,020	$	7,081	$	1,331	$	3,744		$	124,926
Nine Months Ended
Beginning balance	$	21,106	$	7,561		$	68,695		$	3,935	$	15,639		$	1,834	$	7,333	$	695	$	9,177		$	135,975
Transfer to (from) allowance for unfunded credit commitments	—		—			—			—		1,132			—		—		—		(1,132		)	—
Charge-offs	2,065		1,720			8,412			1,876		3,951			1,636		3,157		864		—			23,681
Recoveries	2,730		460			16,116			230		1,458			835		423		280		—			22,532
Provision	430		1,151			(10,040		)	1,575		(3,404		)	987		2,482		1,220		(4,301		)	(9,900		)
Ending balance	$	22,201	$	7,452		$	66,359		$	3,864	$	10,874		$	2,020	$	7,081	$	1,331	$	3,744		$	124,926
Ending allowance balance attributable to loans:
Individually evaluated for impairment	$	2,570	$	180		$	7,567		$	401	$	582		$	—	$	—	$	—	$	1,726		$	13,026
Collectively evaluated for impairment	19,345		7,272			56,851			3,144		10,292			2,020		7,081		1,331		2,018			109,354
Acquired and accounted for under ASC 310-30 (1)	286		—			1,941			319		—			—		—		—		—			2,546
Total ending allowance balance	$	22,201	$	7,452		$	66,359		$	3,864	$	10,874		$	2,020	$	7,081	$	1,331	$	3,744		$	124,926
Loans:
Individually evaluated for impairment	$	21,537	$	1,168		$	56,037		$	11,127	$	2,372		$	—	$	10,280	$	248	$	—		$	102,769
Collectively evaluated for impairment	1,033,534		1,218,193			1,714,224			293,787		147,500			206,973		304,438		84,403		—			5,003,052
Acquired and accounted for under ASC 310-30 (1)	78,275		—			269,348			7,116		125,515			—		568		38,202		—			519,024
Total ending loans balance	$	1,133,346	$	1,219,361		$	2,039,609		$	312,030	$	275,387		$	206,973	$	315,286	$	122,853	$	—		$	5,624,845

(1)  Loans acquired in FDIC-assisted transactions 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 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 in accordance with ASC 310-30 "Nonrefundable Fees and Other Costs" as these loans do not have evidence of credit deterioration since origination.

• Non-impaired loans (typically past-due loans, special mention loans and performing substandard loans) are accounted for in accordance with ASC 310-30 as 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.

In accordance with ASC 310-30, for both purchased non-impaired loans and purchased impaired loans, 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 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 three and nine months ended September 30, 2013 there was a negative provision for credit losses of $1.5 million and $2.5 million, respectively, and net recoveries of $677 thousand and $830 thousand, respectively, in relation to 15 pools of purchased loans with a total carrying amount of $219.1 million as of September 30, 2013. There was $2.9 million in allowance for loan losses related to these purchased loans at September 30, 2013 and $4.5 million at December 31, 2012.  The provision for credit losses and accompanying charge-offs are included in the table above.

Changes in the accretable yield for loans acquired in FDIC-assisted transactions and accounted for under ASC 310-30 were as follows for the three and nine months ended September 30, 2013 and 2012 (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Balance at beginning of period	$	6,360		$	9,411		$	5,685		$	18,703
Accretion	(2,427		)	(3,406		)	(2,859		)	(12,812		)
Other	—			403			1,107			517
Balance at end of period	$	3,933		$	6,408		$	3,933		$	6,408

In our FDIC-assisted transactions, the fair value of purchased 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, MB Financial Bank 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 losses is established for the impairment of the loans. A provision for loan 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 MB Financial Bank to pay back if certain thresholds are met) will increase or decrease accordingly.

The carrying amount of covered loans and other purchased non-covered loans at September 30, 2013 consisted of loans as shown in the following table (in thousands):

September 30, 2013	Purchased Impaired Loans		Purchased Non-Impaired Loans		Total
Covered loans:
Commercial related (1)	$	11,130	$	5,738	$	16,868
Commercial	457		3,527		3,984
Commercial real estate	62,576		97,223		159,799
Construction real estate	53,444		8,002		61,446
Other	2,982		28,418		31,400
Total covered loans	$	130,589	$	142,908	$	273,497
Estimated receivable amount from the FDIC under the loss-share agreement (2)	$	36	$	10,013	$	10,049
Non covered loans:
Commercial related (3)	$	4,357	$	10,440	$	14,797
Other	89		3,617		3,706
Total non-covered loans	$	4,446	$	14,057	$	18,503

(1) Covered commercial related loans include commercial, commercial real estate and construction real estate loans acquired in connection with the Heritage and Benchmark FDIC-assisted transactions.

(2) Estimated reimbursable amounts from the FDIC under the loss-share agreement exclude $1.0 million in reimbursable amounts related to covered other real estate owned.

(3) Non covered commercial related loans include commercial, commercial real estate and construction real estate for InBank.

Outstanding balances on purchased loans from the FDIC were $305.0 million and $515.7 million as of September 30, 2013 and December 31, 2012, respectively.  The related carrying amount on loans purchased from the FDIC was $292.0 million and $471.6 million as of September 30, 2013 and December 31, 2012, respectively.

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net income	$ 24,400	$ 23,133	$ 74,599	$ 66,362
Unrealized holding (losses) gains on investment securities, net of tax and reclassification adjustments	(3,701)	2,118	(25,788)	1,981
Reclassification adjustment for amortization of unrealized gains on investment securities transferred to held to maturity from available for sale, net of tax	(612)	0	(612)	0
Reclassification adjustments for gains included in net income, net of tax	0	(168)	(8)	(146)
Other comprehensive (loss) income, net of tax	(4,313)	1,950	(26,408)	1,835
Comprehensive income	$ 20,087	$ 25,083	$ 48,191	$ 68,197

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Commitments and Contingencies (Details 2) (States and political subdivisions, State of Illinois)	9 Months Ended
	Sep. 30, 2013
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	27.00%

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CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
ASSETS
Cash and due from banks	$ 215,017	$ 176,010
Interest earning deposits with banks	41,700	111,533
Total cash and cash equivalents	256,717	287,543
Federal funds sold	47,500	0
Investment securities:
Securities available for sale, at fair value	1,090,123	1,868,171
Securities held to maturity, at amortized cost ($1,212,748 and $535,681 fair value at September 30, 2013 and December 31, 2012, respectively)	1,193,544	493,421
Non-marketable securities - FHLB and FRB stock	50,870	55,385
Total investment securities	2,334,537	2,416,977
Loans held for sale	1,120	7,492
Loans:
Total loans, excluding covered loans	5,313,235	5,317,080
Covered loans	273,497	449,850
Total loans	5,586,732	5,766,930
Less: Allowance for loan losses	118,031	124,204
Net loans	5,468,701	5,642,726
Lease investment, net	112,491	129,823
Premises and equipment, net	220,574	221,533
Cash surrender value of life insurance	129,332	128,879
Goodwill	423,369	423,369
Other intangibles	24,917	29,512
Other real estate owned, net	31,356	36,977
Other real estate owned related to FDIC-assisted transactions	24,792	22,478
FDIC indemnification asset	11,074	39,345
Other assets	171,138	185,151
Total assets	9,257,618	9,571,805
Deposits:
Noninterest bearing	2,269,367	2,164,547
Interest bearing	5,029,319	5,378,150
Total	7,298,686	7,542,697
Short-term borrowings	240,600	220,602
Long-term borrowings	62,428	116,050
Junior subordinated notes issued to capital trusts	152,065	152,065
Accrued expenses and other liabilities	194,371	264,621
Total liabilities	7,948,150	8,296,035
STOCKHOLDERS’ EQUITY
Common stock, ($0.01 par value; authorized 70,000,000 shares at September 30, 2013 and December 31, 2012; issued 55,141,834 shares at September 30, 2013 and 54,955,284 shares at December 31, 2012)	551	550
Additional paid-in capital	736,294	732,771
Retained earnings	564,779	507,933
Accumulated other comprehensive income	9,918	36,326
Less: 180,296 and 170,567 shares of treasury stock, at cost, at September 30, 2013 and December 31, 2012, respectively	(3,525)	(3,293)
Controlling interest stockholders’ equity	1,308,017	1,274,287
Noncontrolling interest	1,451	1,483
Total stockholders’ equity	1,309,468	1,275,770
Total liabilities and stockholders’ equity	$ 9,257,618	$ 9,571,805

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Goodwill and Intangibles (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, impairment loss			$ 0	$ 0
Carrying amount of goodwill	423,369,000		423,369,000		423,369,000
Weighted average amortization period (in years)			4
Changes in the carrying amount of core deposit and client relationship intangibles
Balance at beginning of period			29,512,000
Amortization expense	(1,513,000)	(1,251,000)	(4,595,000)	(3,759,000)
Balance at end of period	24,917,000		24,917,000
Gross carrying amount	61,429,000		61,429,000
Accumulated amortization	(36,512,000)		(36,512,000)
Net book value	24,917,000		24,917,000
Estimated future amortization expense
2013	1,489,000		1,489,000
2014	4,748,000		4,748,000
2015	4,030,000		4,030,000
2016	3,418,000		3,418,000
2017	3,071,000		3,071,000
Thereafter	8,161,000		8,161,000
Total estimated future amortization expense	$ 24,917,000		$ 24,917,000

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Loans (Tables)

9 Months Ended

Sep. 30, 2013

Receivables [Abstract]

Schedule of composition of loans

Loans consist of the following at (in thousands):

	September 30, 2013		December 31, 2012
Commercial loans	$	1,169,009	$	1,220,472
Commercial loans collateralized by assignment of lease payments	1,468,814		1,303,020
Commercial real estate	1,638,368		1,761,832
Residential real estate	311,256		314,359
Construction real estate	136,146		110,261
Indirect vehicle	257,740		208,633
Home equity	274,484		305,186
Other consumer loans	57,418		93,317
Gross loans, excluding covered loans	5,313,235		5,317,080
Covered loans	273,497		449,850
Total loans(1)	$	5,586,732	$	5,766,930

 (1) Gross loan balances at September 30, 2013 and December 31, 2012 are net of unearned income, including net deferred loan fees of $1.5 million and $1.1 million, respectively.

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, 2013 and December 31, 2012 (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, 2013
Commercial	$	1,158,326	$	2,392	$	2,580	$	5,711	$	10,683	$	1,169,009
Commercial collateralized by assignment of lease payments	1,455,296		10,761		1,816		941		13,518		1,468,814
Commercial real estate
Healthcare	212,659		—		—		3,164		3,164		215,823
Industrial	371,940		161		2,101		1,394		3,656		375,596
Multifamily	316,495		2,808		—		2,387		5,195		321,690
Retail	344,390		236		449		8,632		9,317		353,707
Office	139,251		412		579		2,106		3,097		142,348
Other	223,385		3,443		229		2,147		5,819		229,204
Residential real estate	298,878		1,103		1,059		10,216		12,378		311,256
Construction real estate	133,742		—		89		2,315		2,404		136,146
Indirect vehicle	255,177		1,638		687		238		2,563		257,740
Home equity	260,055		4,505		2,911		7,013		14,429		274,484
Other consumer	57,357		54		1		6		61		57,418
Gross loans, excluding covered loans	5,226,951		27,513		12,501		46,270		86,284		5,313,235
Covered loans	138,876		12,091		5,681		116,849		134,621		273,497
Total loans (1)	$	5,365,827	$	39,604	$	18,182	$	163,119	$	220,905	$	5,586,732
Nonperforming loan aging	$	53,271	$	3,596	$	6,111	$	39,474	$	49,181	$	102,452
Non-covered loans related to FDIC transactions (2)	$	11,339	$	222	$	146	$	6,796	$	7,164	$	18,503
December 31, 2012
Commercial	$	1,215,957	$	639	$	754	$	3,122	$	4,515	$	1,220,472
Commercial collateralized by assignment of lease payments	1,288,341		11,252		2,847		580		14,679		1,303,020
Commercial real estate
Healthcare	192,039		—		—		3,238		3,238		195,277
Industrial	402,813		548		424		7,700		8,672		411,485
Multifamily	353,966		1,282		—		3,103		4,385		358,351
Retail	375,900		6,933		518		9,331		16,782		392,682
Office	186,665		742		280		1,125		2,147		188,812
Other	210,456		851		1,837		2,081		4,769		215,225
Residential real estate	306,927		382		1,248		5,802		7,432		314,359
Construction real estate	106,158		1,139		97		2,867		4,103		110,261
Indirect vehicle	206,126		1,588		498		421		2,507		208,633
Home equity	291,737		3,557		1,888		8,004		13,449		305,186
Other consumer	93,266		47		—		4		51		93,317
Gross loans, excluding covered loans	5,230,351		28,960		10,391		47,378		86,729		5,317,080
Covered loans	301,260		5,831		7,478		135,281		148,590		449,850
Total loans (1)	$	5,531,611	$	34,791	$	17,869	$	182,659	$	235,319	$	5,766,930
Nonperforming loan aging	$	69,836	$	3,171	$	3,718	$	40,261	$	47,150	$	116,986
Non-covered loans related to FDIC transactions (2)	$	12,752	$	312	$	1,542	$	7,115	$	8,969	$	21,721

(1)          Includes loans related to the InBank FDIC-assisted transaction completed by MB Financial Bank in 2009.

(2)          Loans related to the InBank FDIC-assisted transaction completed by MB Financial Bank in 2009.

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 nonaccrual loans and loans past due ninety days or more and still accruing by class of loans as of September 30, 2013 and December 31, 2012 (in thousands):

	September 30, 2013				December 31, 2012
			Loans past due				Loans past due
	Nonaccrual		90 days or more and still accruing		Nonaccrual		90 days or more and still accruing
Commercial	$	19,948	$	—	$	23,886	$	229
Commercial collateralized by assignment of lease payments	2,130		215		1,180		222
Commercial real estate:
Healthcare	3,164		—		3,238		—
Industrial	9,754		—		19,179		147
Multifamily	5,087		195		7,225		—
Office	10,916		—		3,263		—
Retail	3,740		—		17,019		—
Other	21,420		—		9,437		—
Residential real estate	13,041		—		10,943		—
Construction real estate	496		—		1,028		—
Indirect vehicle	1,516		—		1,494		—
Home equity	10,818		—		17,486		1,000
Other consumer	12		—		9		1
Total	$	102,042	$	410	$	115,387	$	1,599

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 as of September 30, 2013 and December 31, 2012 (in thousands):

	Pass		Special Mention		Substandard		Doubtful		Total
September 30, 2013
Commercial	$	1,091,129	$	17,720	$	60,160	$	—	$	1,169,009
Commercial collateralized by assignment of lease payments	1,457,577		4,814		6,423		—		1,468,814
Commercial real estate
Healthcare	188,946		21,556		2,157		3,164		215,823
Industrial	335,274		7,384		32,938		—		375,596
Multifamily	306,691		—		14,999		—		321,690
Retail	324,558		10,373		18,776		—		353,707
Office	132,490		2,732		7,126		—		142,348
Other	201,971		3,088		24,145		—		229,204
Construction real estate	126,902		6,264		2,980		—		136,146
Total	$	4,165,538	$	73,931	$	169,704	$	3,164	$	4,412,337
December 31, 2012
Commercial	$	1,136,294	$	33,068	$	50,895	$	215	$	1,220,472
Commercial collateralized by assignment of lease payments	1,292,241		3,322		7,457		—		1,303,020
Commercial real estate
Healthcare	170,265		21,774		—		3,238		195,277
Industrial	355,218		15,243		41,024		—		411,485
Multifamily	318,991		25,297		14,063		—		358,351
Retail	340,919		25,096		26,667		—		392,682
Office	159,056		7,120		22,636		—		188,812
Other	193,824		2,553		18,848		—		215,225
Construction real estate	97,724		552		11,985		—		110,261
Total	$	4,064,532	$	134,025	$	193,575	$	3,453	$	4,395,585

Recorded investment in loan classes based on payment activity

The following table presents the recorded investment in those loan classes based on payment activity as of September 30, 2013 and December 31, 2012 (in thousands):

	Performing		Non-performing		Total
September 30, 2013
Residential real estate	$	298,215	$	13,041	$	311,256
Indirect vehicle	256,224		1,516		257,740
Home equity	263,666		10,818		274,484
Other consumer	57,406		12		57,418
Total	$	875,511	$	25,387	$	900,898
December 31, 2012
Residential real estate	$	303,416	$	10,943	$	314,359
Indirect vehicle	207,139		1,494		208,633
Home equity	286,700		18,486		305,186
Other consumer	93,307		10		93,317
Total	$	890,562	$	30,933	$	921,495

Loans individually evaluated for impairment by class of loans

The following tables present loans individually evaluated for impairment by class of loans as of September 30, 2013 and December 31, 2012 (in thousands):

	September 30, 2013
									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	$	6,236	$	5,364	$	872	$	—	$	6,509	$	—	$	7,378	$	—
Commercial collateralized by assignment of lease payments	681		681		—		—		666		6		256		6
Commercial real estate:
Healthcare	—		—		—		—		—		—		3,608		—
Industrial	7,547		6,927		620		—		7,902		—		9,316		—
Multifamily	546		546		—		—		665		—		739		—
Retail	3,002		3,002		—		—		3,233		—		3,123		—
Office	685		527		158		—		705		—		986		—
Other	3,149		3,139		10		—		3,353		—		4,785		—
Residential real estate	4,174		3,788		386		—		4,082		—		2,835		—
Construction real estate	—		—		—		—		—		—		—		—
Indirect vehicle	—		—		—		—		—		—		—		—
Home equity	577		577		—		—		577		—		872		—
Other consumer	—		—		—		—		—		—		—		—
With an allowance recorded:
Commercial	14,472		14,472		—		4,389		15,680		—		14,839		—
Commercial collateralized by assignment of lease payments	1,649		1,649		—		285		1,659		109		1,347		158
Commercial real estate:
Healthcare	10,868		3,164		7,704		495		10,869		—		7,302		—
Industrial	2,826		2,826		—		1,047		3,078		—		3,611		—
Multifamily	6,334		5,944		390		1,876		6,408		115		6,642		224
Retail	15,323		13,031		2,292		1,855		13,778		—		13,572		—
Office	3,607		3,214		393		1,047		3,735		—		4,391		—
Other	18,493		18,280		213		1,144		19,790		8		11,104		16
Residential real estate	12,690		12,063		627		3,033		12,494		—		12,965		—
Construction real estate	3,990		1,622		2,368		240		1,736		—		1,938		—
Indirect vehicle	138		106		32		—		146		—		54		—
Home equity	23,171		22,701		470		781		23,558		—		24,341		—
Other consumer	—		—		—		—		—		—		—		—
Total	$	140,158	$	123,623	$	16,535	$	16,192	$	140,623	$	238	$	136,004	$	404

	December 31, 2012
	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	$	10,993	$	9,505	$	1,488	$	—	$	14,089	$	105
Commercial collateralized by assignment of lease payments	390		390		—		—		278		9
Commercial real estate:
Healthcare	10,943		3,238		7,705		—		2,751		—
Industrial	16,891		14,940		1,951		—		16,374		29
Multifamily	800		800		—		—		1,340		14
Retail	5,372		4,917		455		—		9,241		—
Office	1,568		1,568		—		—		1,151		—
Other	4,860		4,860		—		—		6,005		—
Residential real estate	3,097		2,711		386		—		6,476		—
Construction real estate	—		—		—		—		577		—
Indirect vehicle	—		—		—		—		—		—
Home equity	2,558		2,558		—		—		8,976		—
Other consumer	—		—		—		—		182		—
With an allowance recorded:
Commercial	14,484		14,381		103		3,620		8,455		—
Commercial collateralized by assignment of lease payments	885		885		—		188		1,130		73
Commercial real estate:
Healthcare	—		—		—		—		3,901		—
Industrial	5,525		4,238		1,287		1,255		2,443		—
Multifamily	8,233		7,249		984		2,284		5,847		130
Retail	23,144		17,257		5,887		3,604		10,058		—
Office	1,706		1,695		11		522		1,904		—
Other	4,661		4,577		84		1,263		6,082		16
Residential real estate	10,565		10,565		—		2,858		3,417		—
Construction real estate	4,552		2,167		2,385		497		3,775		—
Indirect vehicle	—		—		—		—		—		—
Home equity	13,765		13,763		2		850		4,800		—
Other consumer	—		—		—		—		—		—
Total	$	144,992	$	122,264	$	22,728	$	16,941	$	119,252	$	376

Schedule of loans that have been restructured classified as performing and non-performing

The following table presents loans that have been restructured during the three months ended September 30, 2012 (dollars in thousands):

	September 30, 2012
	Number of Loans	Pre-Modification Recorded Investment		Post-Modification Recorded Investment		Charge-offs and Specific Reserves
Performing:
Home equity	7	$	401	$	325	$	76
Total	7	$	401	$	325	$	76
Non-Performing:
Commercial collateralized by assignment of lease payments	1	$	202	$	202	$	168
Commercial real estate:
Retail	1	202		202		200
Residential real estate	7	173		68		105
Home equity	5	347		232		115
Total	14	$	924	$	704	$	588

The following table presents loans that have been restructured during the nine months ended September 30, 2012 (dollars in thousands):

	September 30, 2012
	Number of Loans	Pre-Modification Recorded Investment		Post-Modification Recorded Investment		Charge-offs and Specific Reserves
Performing:
Commercial real estate:
Multifamily	1	$	155	$	155	$	—
Retail	1	236		236		—
Residential real estate	2	808		808		—
Home equity	38	6,009		5,933		76
Total	42	$	7,208	$	7,132	$	76
Non-Performing:
Commercial	4	$	292	$	292	$	96
Commercial collateralized by assignment of lease payments	1	202		202		168
Commercial real estate:
Multifamily	1	149		149		40
Retail	4	923		923		232
Other	1	157		157		50
Residential real estate	13	637		401		236
Home equity	34	5,324		4,899		425
Total	58	$	7,684	$	7,023	$	1,247

The following table presents loans that have been restructured during the three months ended September 30, 2013 (dollars in thousands):

	September 30, 2013
	Number of Loans	Pre-Modification Recorded Investment		Post-Modification Recorded Investment		Charge-offs and Specific Reserves
Performing:
Residential real estate	1	$	95	$	95	$	—
Home equity	1	19		19		—
Total	2	$	114	$	114	$	—
Non-Performing:
Commercial real estate:
Healthcare	1	$	3,164	$	3,164	$	496
Multifamily	1	436		436		119
Retail	1	205		205		56
Residential real estate	1	394		394		—
Indirect vehicle	17	113		89		24
Home equity	5	397		397		—
Total	26	$	4,709	$	4,685	$	695

The following table presents loans that have been restructured during the nine months ended September 30, 2013 (dollars in thousands):

	September 30, 2013
	Number of Loans	Pre-Modification Recorded Investment		Post-Modification Recorded Investment		Charge-offs and Specific Reserves
Performing:
Commercial real estate:
Multifamily	1	$	601	$	601	$	—
Residential real estate	5	854		854		—
Home equity	7	723		723		—
Total	13	$	2,178	$	2,178	$	—
Non-Performing:
Commercial	2	$	1,251	$	1,251	$	673
Commercial real estate:
Healthcare	1	3,164		3,164		496
Industrial	4	2,570		2,570		1,425
Multifamily	2	623		623		169
Retail	3	862		862		235
Other	1	84		84		23
Residential real estate	6	1,149		1,149		—
Indirect vehicle	20	127		103		24
Home equity	25	3,333		3,333		—
Total	64	$	13,163	$	13,139	$	3,045

Troubled debt restructuring activity rollforward

The following tables present the troubled debt restructurings activity during the nine months ended September 30, 2013 (dollars in thousands):

	Performing			Non-performing
Beginning balance	$	21,256		$	28,418
Additions	2,178			13,163
Charge-offs	—			(3,127		)
Principal payments, net	(883		)	(8,008		)
Removals	—			(565		)
Transfer to other real estate owned	—			(206		)
Transfer from/to performing	8,458			1,098
Transfer from/to nonperforming	(1,098		)	(8,458		)
Ending balance	$	29,911		$	22,315

Type of financing receivable modifications and restructuring

The following table presents the type of modification for loans that have been restructured and the pre-modification recorded investment during the nine months ended September 30, 2013 (dollars in thousands):

	September 30, 2013
	Extended		Extended				Extended
	Maturity,		Maturity, Delay		Extended		Maturity, Delay				Delay in
	Amortization		in Payments and		Maturity and		in Payments and				Payments or
	and Reduction		Reduction of		Reduction of		Reduction of		Extended		Reduction of
	of Interest Rate		Interest Rate		Interest Rate		Amount		Maturity		Interest Rate		Total
Commercial	$	42	$	—	$	1,209	$	—	$	—	$	—	$	1,251
Commercial collateralized by assignment of lease payments	—		—		—		—		—		—		—
Commercial real estate:
Healthcare	—		—		—		3,164		—		—		3,164
Industrial	—		—		—		—		2,570		—		2,570
Multifamily	187		—		—		—		601		436		1,224
Retail	256		205		401		—		—		—		862
Office	—		—		—		—		—		—		—
Other	84		—		—		—		—		—		84
Residential real estate	1,386		—		—		—		—		618		2,004
Construction real estate	—		—		—		—		—		—		—
Indirect vehicle	—		—		—		—		—		127		127
Home equity	1,509		—		708		—		227		1,611		4,055
Other consumer	—		—		—		—		—		—		—
Total	$	3,464	$	205	$	2,318	$	3,164	$	3,398	$	2,792	$	15,341

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, 2013 and 2012 (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, 2013
Allowance for credit losses:
Three Months Ended
Beginning balance	$	27,277		$	8,529	$	60,014		$	8,121	$	8,695		$	1,537	$	8,206		$	1,306	$	1,812		$	125,497
Transfer to (from) allowance for unfunded credit commitments	—			—		—			—		—			—		—			—		—			—
Charge-offs	1,686			—		1,236			713		26			572		437			485		—			5,155
Recoveries	579			—		966			48		420			372		228			74		—			2,687
Provision	(45		)	721		(3,983		)	347		(735		)	293		(152		)	368		(118		)	(3,304		)
Ending balance	$	26,125		$	9,250	$	55,761		$	7,803	$	8,354		$	1,630	$	7,845		$	1,263	$	1,694		$	119,725
Nine Months Ended
Beginning balance	$	24,943		$	7,755	$	61,056		$	6,941	$	11,222		$	1,324	$	9,401		$	1,562	$	4,075		$	128,279
Transfer to (from) allowance for unfunded credit commitments	—			—		—			—		500			—		—			—		(500		)	—
Charge-offs	3,030			—		5,131			2,074		855			1,930		2,547			1,501		—			17,068
Recoveries	1,808			1,131		5,353			461		827			1,111		442			185		—			11,318
Provision	2,404			364		(5,517		)	2,475		(3,340		)	1,125		549			1,017		(1,881		)	(2,804		)
Ending balance	$	26,125		$	9,250	$	55,761		$	7,803	$	8,354		$	1,630	$	7,845		$	1,263	$	1,694		$	119,725
Ending allowance balance attributable to loans:
Individually evaluated for impairment	$	4,389		$	285	$	7,464		$	3,033	$	240		$	—	$	781		$	—	$	657		$	16,849
Collectively evaluated for impairment	20,871			8,965		46,412			4,663		8,114			1,630		7,064			1,263		1,037			100,019
Acquired and accounted for under ASC 310-30 (1)	865			—		1,885			107		—			—		—			—		—			2,857
Total ending allowance balance	$	26,125		$	9,250	$	55,761		$	7,803	$	8,354		$	1,630	$	7,845		$	1,263	$	1,694		$	119,725
Loans:
Individually evaluated for impairment	$	19,836		$	2,330	$	60,600		$	15,851	$	1,622		$	106	$	23,278		$	—	$	—		$	123,623
Collectively evaluated for impairment	1,134,376			1,466,484		1,577,768			291,699		134,524			257,634		251,206			57,418		—			5,171,109
Acquired and accounted for under ASC 310-30 (1)	35,649			—		159,799			5,982		61,446			—		110			29,014		—			292,000
Total ending loans balance	$	1,189,861		$	1,468,814	$	1,798,167		$	313,532	$	197,592		$	257,740	$	274,594		$	86,432	$	—		$	5,586,732

	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, 2012
Allowance for credit losses:
Three Months Ended
Beginning balance	$	20,789	$	7,490		$	68,713		$	3,592	$	10,586		$	1,941	$	7,617	$	1,028	$	7,084		$	128,840
Charge-offs	75		—			2,994			474		71			433		1,209		332		—			5,588
Recoveries	306		111			12,893			8		752			224		303		77		—			14,674
Provision	1,181		(149		)	(12,253		)	738		(393		)	288		370		558		(3,340		)	(13,000		)
Ending balance	$	22,201	$	7,452		$	66,359		$	3,864	$	10,874		$	2,020	$	7,081	$	1,331	$	3,744		$	124,926
Nine Months Ended
Beginning balance	$	21,106	$	7,561		$	68,695		$	3,935	$	15,639		$	1,834	$	7,333	$	695	$	9,177		$	135,975
Transfer to (from) allowance for unfunded credit commitments	—		—			—			—		1,132			—		—		—		(1,132		)	—
Charge-offs	2,065		1,720			8,412			1,876		3,951			1,636		3,157		864		—			23,681
Recoveries	2,730		460			16,116			230		1,458			835		423		280		—			22,532
Provision	430		1,151			(10,040		)	1,575		(3,404		)	987		2,482		1,220		(4,301		)	(9,900		)
Ending balance	$	22,201	$	7,452		$	66,359		$	3,864	$	10,874		$	2,020	$	7,081	$	1,331	$	3,744		$	124,926
Ending allowance balance attributable to loans:
Individually evaluated for impairment	$	2,570	$	180		$	7,567		$	401	$	582		$	—	$	—	$	—	$	1,726		$	13,026
Collectively evaluated for impairment	19,345		7,272			56,851			3,144		10,292			2,020		7,081		1,331		2,018			109,354
Acquired and accounted for under ASC 310-30 (1)	286		—			1,941			319		—			—		—		—		—			2,546
Total ending allowance balance	$	22,201	$	7,452		$	66,359		$	3,864	$	10,874		$	2,020	$	7,081	$	1,331	$	3,744		$	124,926
Loans:
Individually evaluated for impairment	$	21,537	$	1,168		$	56,037		$	11,127	$	2,372		$	—	$	10,280	$	248	$	—		$	102,769
Collectively evaluated for impairment	1,033,534		1,218,193			1,714,224			293,787		147,500			206,973		304,438		84,403		—			5,003,052
Acquired and accounted for under ASC 310-30 (1)	78,275		—			269,348			7,116		125,515			—		568		38,202		—			519,024
Total ending loans balance	$	1,133,346	$	1,219,361		$	2,039,609		$	312,030	$	275,387		$	206,973	$	315,286	$	122,853	$	—		$	5,624,845

(1)  Loans acquired in FDIC-assisted transactions 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 in FDIC-assisted transactions and accounted for under ASC 310-30 were as follows for the three and nine months ended September 30, 2013 and 2012 (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Balance at beginning of period	$	6,360		$	9,411		$	5,685		$	18,703
Accretion	(2,427		)	(3,406		)	(2,859		)	(12,812		)
Other	—			403			1,107			517
Balance at end of period	$	3,933		$	6,408		$	3,933		$	6,408

Purchased loans disclosures

The carrying amount of covered loans and other purchased non-covered loans at September 30, 2013 consisted of loans as shown in the following table (in thousands):

September 30, 2013	Purchased Impaired Loans		Purchased Non-Impaired Loans		Total
Covered loans:
Commercial related (1)	$	11,130	$	5,738	$	16,868
Commercial	457		3,527		3,984
Commercial real estate	62,576		97,223		159,799
Construction real estate	53,444		8,002		61,446
Other	2,982		28,418		31,400
Total covered loans	$	130,589	$	142,908	$	273,497
Estimated receivable amount from the FDIC under the loss-share agreement (2)	$	36	$	10,013	$	10,049
Non covered loans:
Commercial related (3)	$	4,357	$	10,440	$	14,797
Other	89		3,617		3,706
Total non-covered loans	$	4,446	$	14,057	$	18,503

(1) Covered commercial related loans include commercial, commercial real estate and construction real estate loans acquired in connection with the Heritage and Benchmark FDIC-assisted transactions.

(2) Estimated reimbursable amounts from the FDIC under the loss-share agreement exclude $1.0 million in reimbursable amounts related to covered other real estate owned.

(3) Non covered commercial related loans include commercial, commercial real estate and construction real estate for InBank.

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Derivative Financial Instruments

9 Months Ended

Sep. 30, 2013

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 our 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 income statement.

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, 2013 was approximately $24 thousand, and the net amount payable as of December 31, 2012 was approximately $30 thousand.  The Company's credit exposure on interest rate swaps is limited to the Company's net favorable value and interest payments of all swaps to each counterparty. In such cases, collateral is generally required from the counterparties involved if the net value of the swaps exceeds a nominal amount.  At September 30, 2013, the Company’s credit exposure relating to interest rate swaps was approximately $17.9 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 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 $248 thousand at September 30, 2013.  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.

The Company’s derivative financial instruments are summarized below as of September 30, 2013 and December 31, 2012 (in thousands):

	Asset Derivatives								Liability Derivatives
	September 30, 2013				December 31, 2012				September 30, 2013					December 31, 2012
	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)	$	—	$	—	$	—	$	—	$	248	$	(26	)	$	3,707	$	(94	)
Stand-alone derivative instruments (2)
Interest rate swap contracts	570,472		17,813		460,956		27,740		571,445		(17,875		)	462,012		(27,832		)
Interest rate options contracts	84,095		307		70,346		157		84,095		(307		)	70,346		(157		)
Foreign exchange contracts	16,112		912		20,033		1,062		15,536		(818		)	19,337		(961		)
Mortgage banking derivatives	4,794		80		11,400		137		2,603		(34		)	4,000		(11		)
Total non-hedging derivative instruments	675,473		19,112		562,735		29,096		673,679		(19,034		)	555,695		(28,961		)
Total	$	675,473	$	19,112	$	562,735	$	29,096	$	673,927	$	(19,060	)	$	559,402	$	(29,055	)

(1) Hedged fixed-rate commercial real estate loans

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

Amounts included in the other 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,
	2013			2012		2013			2012
Derivative instruments designated as hedges of fair value:
Interest rate swap contracts	$	(1	)	$	—	$	9		$	(36	)
Stand-alone derivative instruments
Interest rate swap contracts	7			6		30			19
Interest rate options contracts	—			—		—			—
Foreign exchange contracts	(12		)	14		(7		)	44
Mortgage banking derivatives	(16		)	9		(80		)	79
Total non-hedging derivative instruments	(21		)	29		(57		)	142
Total	$	(22	)	$	29	$	(48	)	$	106

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, 2013 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 swaps, caps and floors	$	3,483	$	—	$	3,483	$	14,724	$	—	$	14,724
Foreign currency forward contracts	67		—		67		764		—		764
Mortgage banking derivatives	—		—		—		34		—		34
Total derivatives	3,550		—		3,550		15,522		—		15,522
Repurchase agreements	—		—		—		240,600		—		240,600
Total	$	3,550	$	—	$	3,550	$	256,122	$	—	$	256,122

	Financial Assets									Financial Liabilities
	Net Amount Recognized		Financial Instruments			Collateral		Net Amount		Net Amount Recognized		Financial Instruments			Collateral			Net Amount
Derivatives:
Counterparty A	$	440	$	(440	)	$	—	$	—	$	12,976	$	(440	)	$	(12,536	)	$	—
Counterparty B	1,090		(551		)	—		539		551		(551		)	—			—
Counterparty C	1,570		(1,570		)	—		—		1,949		(1,570		)	(379		)	—
Other counterparties	450		(1		)	—		449		46		(1		)	—			45
Total derivatives	3,550		(2,562		)	—		988		15,522		(2,562		)	(12,915		)	45
Repurchase agreements	—		—			—		—		240,600		—			(240,600		)	—
Total	$	3,550	$	(2,562	)	$	—	$	988	$	256,122	$	(2,562	)	$	(253,515	)	$	45

Information about the Company's financial instruments that are eligible for offset in the consolidated balance sheet as of December 31, 2012 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 swaps, caps and floors	$	192	$	—	$	192	$	27,890	$	—	$	27,890
Foreign currency forward contracts	43		—		43		929		—		929
Mortgage banking derivatives	1		—		1		11		—		11
Total derivatives	236		—		236		28,830		—		28,830
Repurchase agreements	—		—		—		208,242		—		208,242
Total	$	236	$	—	$	236	$	237,072	$	—	$	237,072

	Financial Assets									Financial Liabilities
	Net Amount Recognized		Financial Instruments			Collateral		Net Amount		Net Amount Recognized		Financial Instruments			Collateral			Net Amount
Derivatives:
Counterparty A	$	68	$	(68	)	$	—	$	—	$	25,497	$	(68	)	$	(25,429	)	$	—
Counterparty B	84		(84		)	—		—		633		(84		)	(549		)	—
Counterparty C	36		(36		)	—		—		2,305		(36		)	(2,269		)	—
Other counterparties	48		(42		)	—		6		395		(42		)	(298		)	55
Total derivatives	236		(230		)	—		6		28,830		(230		)	(28,545		)	55
Repurchase agreements	—		—			—		—		208,242		—			(208,242		)	—
Total	$	236	$	(230	)	$	—	$	6	$	237,072	$	(230	)	$	(236,787	)	$	55

XML

Loans (Details 2) (USD $)	9 Months Ended
	Sep. 30, 2013		Dec. 31, 2012		Sep. 30, 2012
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	$ 5,313,235,000		$ 5,317,080,000
Loans and Leases Receivable, Net of Deferred Income Including Covered Loans	5,586,732,000		5,766,930,000		5,624,845,000
Period past due of recorded investment in loans (in days)	90 days
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Non-performing substandard and doubtful loans	76,500,000		85,500,000
Pass
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	4,165,538,000		4,064,532,000
Special Mention
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	73,931,000		134,025,000
Substandard
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	169,704,000		193,575,000
Doubtful
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	3,164,000		3,453,000
Total risk rated category
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	4,412,337,000		4,395,585,000
Non-performing
Contractual aging of the recorded investment in loans
Current	53,271,000		69,836,000
30-59 days, past due	3,596,000		3,171,000
60-89 days, past due	6,111,000		3,718,000
Loans past due, 90 days or more	39,474,000		40,261,000
Total, past due	49,181,000		47,150,000
Loans and Leases Receivable, Net of Deferred Income Including Covered Loans	102,452,000		116,986,000
Commercial loans
Contractual aging of the recorded investment in loans
Current	1,158,326,000		1,215,957,000
30-59 days, past due	2,392,000		639,000
60-89 days, past due	2,580,000		754,000
Loans past due, 90 days or more	5,711,000		3,122,000
Total, past due	10,683,000		4,515,000
Total loans, excluding covered loans	1,169,009,000		1,220,472,000
Loans and Leases Receivable, Net of Deferred Income Including Covered Loans	1,189,861,000				1,133,346,000
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Nonaccrual	19,948,000		23,886,000
Loans past due 90 days or more and still accruing	0		229,000
Commercial loans | Pass
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	1,091,129,000		1,136,294,000
Commercial loans | Special Mention
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	17,720,000		33,068,000
Commercial loans | Substandard
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	60,160,000		50,895,000
Commercial loans | Doubtful
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	0		215,000
Commercial loans | Total risk rated category
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	1,169,009,000		1,220,472,000
Commercial loans collateralized by assignment of lease payments
Contractual aging of the recorded investment in loans
Current	1,455,296,000		1,288,341,000
30-59 days, past due	10,761,000		11,252,000
60-89 days, past due	1,816,000		2,847,000
Loans past due, 90 days or more	941,000		580,000
Total, past due	13,518,000		14,679,000
Total loans, excluding covered loans	1,468,814,000		1,303,020,000
Loans and Leases Receivable, Net of Deferred Income Including Covered Loans	1,468,814,000				1,219,361,000
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Nonaccrual	2,130,000		1,180,000
Loans past due 90 days or more and still accruing	215,000		222,000
Commercial loans collateralized by assignment of lease payments | Pass
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	1,457,577,000		1,292,241,000
Commercial loans collateralized by assignment of lease payments | Special Mention
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	4,814,000		3,322,000
Commercial loans collateralized by assignment of lease payments | Substandard
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	6,423,000		7,457,000
Commercial loans collateralized by assignment of lease payments | Doubtful
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	0		0
Commercial loans collateralized by assignment of lease payments | Total risk rated category
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	1,468,814,000		1,303,020,000
Commercial real estate
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	1,638,368,000		1,761,832,000
Loans and Leases Receivable, Net of Deferred Income Including Covered Loans	1,798,167,000				2,039,609,000
Healthcare
Contractual aging of the recorded investment in loans
Current	212,659,000		192,039,000
30-59 days, past due	0		0
60-89 days, past due	0		0
Loans past due, 90 days or more	3,164,000		3,238,000
Total, past due	3,164,000		3,238,000
Total loans, excluding covered loans	215,823,000		195,277,000
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Nonaccrual	3,164,000		3,238,000
Loans past due 90 days or more and still accruing	0		0
Healthcare | Pass
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	188,946,000		170,265,000
Healthcare | Special Mention
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	21,556,000		21,774,000
Healthcare | Substandard
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	2,157,000		0
Healthcare | Doubtful
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	3,164,000		3,238,000
Healthcare | Total risk rated category
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	215,823,000		195,277,000
Industrial
Contractual aging of the recorded investment in loans
Current	371,940,000		402,813,000
30-59 days, past due	161,000		548,000
60-89 days, past due	2,101,000		424,000
Loans past due, 90 days or more	1,394,000		7,700,000
Total, past due	3,656,000		8,672,000
Total loans, excluding covered loans	375,596,000		411,485,000
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Nonaccrual	9,754,000		19,179,000
Loans past due 90 days or more and still accruing	0		147,000
Industrial | Pass
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	335,274,000		355,218,000
Industrial | Special Mention
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	7,384,000		15,243,000
Industrial | Substandard
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	32,938,000		41,024,000
Industrial | Doubtful
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	0		0
Industrial | Total risk rated category
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	375,596,000		411,485,000
Multifamily
Contractual aging of the recorded investment in loans
Current	316,495,000		353,966,000
30-59 days, past due	2,808,000		1,282,000
60-89 days, past due	0		0
Loans past due, 90 days or more	2,387,000		3,103,000
Total, past due	5,195,000		4,385,000
Total loans, excluding covered loans	321,690,000		358,351,000
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Nonaccrual	5,087,000		7,225,000
Loans past due 90 days or more and still accruing	195,000		0
Multifamily | Pass
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	306,691,000		318,991,000
Multifamily | Special Mention
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	0		25,297,000
Multifamily | Substandard
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	14,999,000		14,063,000
Multifamily | Doubtful
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	0		0
Multifamily | Total risk rated category
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	321,690,000		358,351,000
Retail
Contractual aging of the recorded investment in loans
Current	344,390,000		375,900,000
30-59 days, past due	236,000		6,933,000
60-89 days, past due	449,000		518,000
Loans past due, 90 days or more	8,632,000		9,331,000
Total, past due	9,317,000		16,782,000
Total loans, excluding covered loans	353,707,000		392,682,000
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Nonaccrual	3,740,000		17,019,000
Loans past due 90 days or more and still accruing	0		0
Retail | Pass
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	324,558,000		340,919,000
Retail | Special Mention
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	10,373,000		25,096,000
Retail | Substandard
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	18,776,000		26,667,000
Retail | Doubtful
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	0		0
Retail | Total risk rated category
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	353,707,000		392,682,000
Office
Contractual aging of the recorded investment in loans
Current	139,251,000		186,665,000
30-59 days, past due	412,000		742,000
60-89 days, past due	579,000		280,000
Loans past due, 90 days or more	2,106,000		1,125,000
Total, past due	3,097,000		2,147,000
Total loans, excluding covered loans	142,348,000		188,812,000
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Nonaccrual	10,916,000		3,263,000
Loans past due 90 days or more and still accruing	0		0
Office | Pass
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	132,490,000		159,056,000
Office | Special Mention
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	2,732,000		7,120,000
Office | Substandard
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	7,126,000		22,636,000
Office | Doubtful
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	0		0
Office | Total risk rated category
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	142,348,000		188,812,000
Other
Contractual aging of the recorded investment in loans
Current	223,385,000		210,456,000
30-59 days, past due	3,443,000		851,000
60-89 days, past due	229,000		1,837,000
Loans past due, 90 days or more	2,147,000		2,081,000
Total, past due	5,819,000		4,769,000
Total loans, excluding covered loans	229,204,000		215,225,000
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Nonaccrual	21,420,000		9,437,000
Loans past due 90 days or more and still accruing	0		0
Other | Pass
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	201,971,000		193,824,000
Other | Special Mention
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	3,088,000		2,553,000
Other | Substandard
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	24,145,000		18,848,000
Other | Doubtful
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	0		0
Other | Total risk rated category
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	229,204,000		215,225,000
Residential real estate
Contractual aging of the recorded investment in loans
Current	298,878,000		306,927,000
30-59 days, past due	1,103,000		382,000
60-89 days, past due	1,059,000		1,248,000
Loans past due, 90 days or more	10,216,000		5,802,000
Total, past due	12,378,000		7,432,000
Total loans, excluding covered loans	311,256,000		314,359,000
Loans and Leases Receivable, Net of Deferred Income Including Covered Loans	313,532,000				312,030,000
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Nonaccrual	13,041,000		10,943,000
Loans past due 90 days or more and still accruing	0		0
Residential real estate | Performing
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	298,215,000		303,416,000
Residential real estate | Non-performing
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	13,041,000		10,943,000
Construction real estate
Contractual aging of the recorded investment in loans
Current	133,742,000		106,158,000
30-59 days, past due	0		1,139,000
60-89 days, past due	89,000		97,000
Loans past due, 90 days or more	2,315,000		2,867,000
Total, past due	2,404,000		4,103,000
Total loans, excluding covered loans	136,146,000		110,261,000
Loans and Leases Receivable, Net of Deferred Income Including Covered Loans	197,592,000				275,387,000
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Nonaccrual	496,000		1,028,000
Loans past due 90 days or more and still accruing	0		0
Construction real estate | Pass
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	126,902,000		97,724,000
Construction real estate | Special Mention
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	6,264,000		552,000
Construction real estate | Substandard
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	2,980,000		11,985,000
Construction real estate | Doubtful
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	0		0
Construction real estate | Total risk rated category
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	136,146,000		110,261,000
Indirect vehicle
Contractual aging of the recorded investment in loans
Current	255,177,000		206,126,000
30-59 days, past due	1,638,000		1,588,000
60-89 days, past due	687,000		498,000
Loans past due, 90 days or more	238,000		421,000
Total, past due	2,563,000		2,507,000
Total loans, excluding covered loans	257,740,000		208,633,000
Loans and Leases Receivable, Net of Deferred Income Including Covered Loans	257,740,000				206,973,000
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Nonaccrual	1,516,000		1,494,000
Loans past due 90 days or more and still accruing	0		0
Indirect vehicle | Performing
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	256,224,000		207,139,000
Indirect vehicle | Non-performing
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	1,516,000		1,494,000
Home equity lines
Contractual aging of the recorded investment in loans
Current	260,055,000		291,737,000
30-59 days, past due	4,505,000		3,557,000
60-89 days, past due	2,911,000		1,888,000
Loans past due, 90 days or more	7,013,000		8,004,000
Total, past due	14,429,000		13,449,000
Total loans, excluding covered loans	274,484,000		305,186,000
Loans and Leases Receivable, Net of Deferred Income Including Covered Loans	274,594,000				315,286,000
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Nonaccrual	10,818,000		17,486,000
Loans past due 90 days or more and still accruing	0		1,000,000
Home equity lines | Performing
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	263,666,000		286,700,000
Home equity lines | Non-performing
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	10,818,000		18,486,000
Other consumer
Contractual aging of the recorded investment in loans
Current	57,357,000		93,266,000
30-59 days, past due	54,000		47,000
60-89 days, past due	1,000		0
Loans past due, 90 days or more	6,000		4,000
Total, past due	61,000		51,000
Total loans, excluding covered loans	57,418,000		93,317,000
Loans and Leases Receivable, Net of Deferred Income Including Covered Loans	86,432,000				122,853,000
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Nonaccrual	12,000		9,000
Loans past due 90 days or more and still accruing	0		1,000
Other consumer | Performing
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	57,406,000		93,307,000
Other consumer | Non-performing
Contractual aging of the recorded investment in loans
Total loans, excluding covered loans	12,000		10,000
Gross loans, excluding covered loans
Contractual aging of the recorded investment in loans
Current	5,226,951,000		5,230,351,000
30-59 days, past due	27,513,000		28,960,000
60-89 days, past due	12,501,000		10,391,000
Loans past due, 90 days or more	46,270,000		47,378,000
Total, past due	86,284,000		86,729,000
Total loans, excluding covered loans	5,313,235,000		5,317,080,000
Covered loans
Contractual aging of the recorded investment in loans
Current	138,876,000		301,260,000
30-59 days, past due	12,091,000		5,831,000
60-89 days, past due	5,681,000		7,478,000
Loans past due, 90 days or more	116,849,000		135,281,000
Total, past due	134,621,000		148,590,000
Loans and Leases Receivable, Net of Deferred Income Including Covered Loans	273,497,000		449,850,000
Loans
Contractual aging of the recorded investment in loans
Current	5,365,827,000		5,531,611,000
30-59 days, past due	39,604,000		34,791,000
60-89 days, past due	18,182,000		17,869,000
Loans past due, 90 days or more	163,119,000		182,659,000
Total, past due	220,905,000		235,319,000
Loans and Leases Receivable, Net of Deferred Income Including Covered Loans	5,586,732,000		5,766,930,000
Recorded investment in nonaccrual loans and loans past due ninety days or more and still accruing
Nonaccrual	102,042,000		115,387,000
Loans past due 90 days or more and still accruing	410,000		1,599,000
Non-covered loans related to FDIC transactions
Contractual aging of the recorded investment in loans
Current	11,339,000	[1]	12,752,000	[1]
30-59 days, past due	222,000	[1]	312,000	[1]
60-89 days, past due	146,000	[1]	1,542,000	[1]
Loans past due, 90 days or more	6,796,000	[1]	7,115,000	[1]
Total, past due	7,164,000		8,969,000
Loans and Leases Receivable, Net of Deferred Income Including Covered Loans	$ 18,503,000		$ 21,721,000

[1] Loans related to the InBank FDIC-assisted transaction completed by MB Financial Bank in 2009.

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Long-term Borrowings (Details) (USD $)	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Long-term borrowings
Federal Home Loan Bank advances	$ 4,300,000	$ 4,300,000
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%
Loans pledged as collateral for long-term Federal Home Loan Bank advances	7,300,000	28,400,000
Investment securities pledged as collateral for long-term Federal Home Loan Bank advances	29,200,000	32,100,000
Principal payments due on long-term borrowings
Long-term Debt	62,428,000	116,050,000
Notes payable to banks
Long-term borrowings
Minimum interest rates (as a percent)	2.50%
Maximum interest rates (as a percent)	12.00%
Equipment pledged as collateral	25,900,000	29,700,000
Principal payments due on long-term borrowings
Long-term Debt	17,700,000	21,100,000
Structured repurchase agreement
Long-term borrowings
Term of structured repurchase agreement (in years)	10 years
Fixed interest rate, if option not exercised (as a percent)	4.75%
Principal payments due on long-term borrowings
Long-term Debt	40,000,000
Subordinated debt facility
Principal payments due on long-term borrowings
Long-term Debt	$ 50,000,000
Description of interest rate basis	3-month LIBOR
Interest rate, basis spread (as a percent)	1.70%
Minimum
Long-term borrowings
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%

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Derivative Financial Instruments (Details 2) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Derivative [Line Items]
Financial Assets, Gross Amount Recognized	$ 3,550	$ 236
Financial Assets, Gross Amount Offset	0	0
Financial Assets, Net Amount Recognized	3,550	236
Financial Liabilities, Gross Amount Recognized	15,522	28,830
Financial Liabilities, Gross Amount Offset	0	0
Financial Liabilities, Net Amount Recognized	15,522	28,830
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	240,600	208,242
Repurchase Agreements, Financial Liabilities, Gross Amount Offset	0	0
Repurchase Agreements, Financial Liabilities, Net Amount Recognized	240,600	208,242
Total Financial Assets, Gross Amount Recognized	3,550	236
Total Financial Assets, Gross Amount Offset	0	0
Total Financial Assets, Net Amount Recognized	3,550	236
Total Financial Liabilities, Gross Amount Recognized	256,122	237,072
Total Financial Liabilities, Gross Amount Offset	0	0
Total Financial Liabilities, Net Amount Recognized	256,122	237,072
Interest rate swaps, caps and floors
Derivative [Line Items]
Financial Assets, Gross Amount Recognized	3,483	192
Financial Assets, Gross Amount Offset	0	0
Financial Assets, Net Amount Recognized	3,483	192
Financial Liabilities, Gross Amount Recognized	14,724	27,890
Financial Liabilities, Gross Amount Offset	0	0
Financial Liabilities, Net Amount Recognized	14,724	27,890
Foreign currency forward contracts
Derivative [Line Items]
Financial Assets, Gross Amount Recognized	67	43
Financial Assets, Gross Amount Offset	0	0
Financial Assets, Net Amount Recognized	67	43
Financial Liabilities, Gross Amount Recognized	764	929
Financial Liabilities, Gross Amount Offset	0	0
Financial Liabilities, Net Amount Recognized	764	929
Mortgage banking derivatives
Derivative [Line Items]
Financial Assets, Gross Amount Recognized	0	1
Financial Assets, Gross Amount Offset	0	0
Financial Assets, Net Amount Recognized	0	1
Financial Liabilities, Gross Amount Recognized	34	11
Financial Liabilities, Gross Amount Offset	0	0
Financial Liabilities, Net Amount Recognized	$ 34	$ 11

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Business Combinations (Details) (USD $)	6 Months Ended	0 Months Ended
	Jun. 30, 2013	Dec. 28, 2012 Celtic [Member]
Assets Acquired and Liabilities Assumed
Cash and cash equivalents		$ 31,647,000
Investment securities available for sale		635,000
Loans and leases		32,933,000
Premises and equipment		81,000
Goodwill		36,300,000
Other intangible		5,028,000
Other assets		27,323,000
Total assets		133,947,000
Accrued expenses and other liabilities		75,290,000
Total liabilities		75,290,000
Cash paid (received) on acquisition		58,657,000
Net gain recorded on acquisition		0
Business combination, assets to be acquired	5,900,000,000
Business combination, loans to be acquired	3,300,000,000
Business combination, deposits to be acquired	$ 3,700,000,000
Business combination, share conversion	0.64318
Business combination, amount per share	$ 4.08

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2013

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, 2013 and December 31, 2012, 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, 2013
Financial assets
Securities available for sale:
U.S Government sponsored agencies and enterprises	$	52,527	$	—	$	52,527	$	—
States and political subdivisions	19,312		—		19,312		—
Residential mortgage-backed securities	691,276		—		690,546		730
Commercial mortgage-backed securities	53,446		—		53,446		—
Corporate bonds	263,021		—		257,857		5,164
Equity securities	10,541		10,541		—		—
Loans held for sale	1,120		—		1,120		—
Assets held in trust for deferred compensation	10,077		10,077		—		—
Derivative financial instruments	19,112		—		19,112		—
Financial liabilities
Other liabilities (1)	9,892		9,892		—		—
Derivative financial instruments	19,060		—		19,060		—
December 31, 2012
Financial assets
Securities available for sale:
U.S. Government sponsored agencies and enterprises	$	41,315	$	—	$	41,315	$	—
States and political subdivisions	725,019		—		725,019		—
Residential mortgage-backed securities	939,202		—		938,354		848
Commercial mortgage-backed securities	54,126		—		54,126		—
Corporate bonds	96,674		—		91,451		5,223
Equity securities	11,835		11,835		—		—
Loans held for sale	7,492		—		7,492		—
Assets held in trust for deferred compensation	7,746		7,746		—		—
Derivative financial instruments	29,096		—		29,096		—
Financial liabilities
Other liabilities (1)	7,746		7,746		—		—
Derivative financial instruments	29,055		—		29,055		—

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

Financial assest 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		Valuation	Unobservable
	September 30, 2013		Technique	Input	Range
Residential mortgage-backed securities	$	730	Discounted cash flows	Constant pre-payment rates
				(CPR) assumption	1% - 3% CPR
Corporate bonds	5,164		Discounted cash flows	Credit assumption	20% Loss

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, 2013		Technique	Input	Range
Impaired loans	$	84,500	Appraisal of collateral	Appraisal adjustments - sales costs	5% - 10%
Foreclosed assets	57,009		Appraisal of collateral	Appraisal adjustments - sales costs	5% - 10%

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,
(in thousands)	2013			2012
Balance, beginning of period	$	6,071		$	6,992
Other comprehensive income	(59		)	89
Principal payments	(118		)	(846		)
Impairment charge	—			(117		)
Balance, ending of period	$	5,894		$	6,118

Assets measured at fair value on a nonrecurring basis

Assets measured at fair value on a nonrecurring basis as of September 30, 2013 and December 31, 2012 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, 2013
Financial assets:
Impaired loans	$	84,500	$	—	$	—	$	84,500
Non-financial assets:
Foreclosed assets	57,009		—		—		57,009
December 31, 2012
Financial assets:
Impaired loans	$	62,258	$	—	$	—	$	62,258
Non-financial assets:
Foreclosed assets	60,228		—		—		60,228
Long-lived assets	2,314		—		—		2,314

Estimated fair values of financial instruments

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

	September 30, 2013
	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	$	215,017	$	215,017	$	215,017	$	—	$	—
Interest bearing deposits with banks	41,700		41,700		41,700		—		—
Investment securities available for sale	1,090,123		1,090,123		10,541		1,073,688		5,894
Investment securities held to maturity	1,193,544		1,212,748		—		1,212,748		—
Non-marketable securities - FHLB and FRB stock	50,870		50,870		—		—		50,870
Loans held for sale	1,120		1,120		—		1,120		—
Loans, net	5,468,701		5,470,567		—		—		5,470,567
Accrued interest receivable	35,938		35,938		35,938		—		—
Derivative financial instruments	19,112		19,112		—		19,112		—
Financial Liabilities:
Noninterest bearing deposits	$	2,269,367	$	2,269,367	$	2,269,367	$	—	$	—
Interest bearing deposits	5,029,319		5,039,175		—		—		5,039,175
Short-term borrowings	240,600		240,595		—		—		240,595
Long-term borrowings	62,428		67,425		—		—		67,425
Junior subordinated notes issued to capital trusts	152,065		105,967		—		—		105,967
Accrued interest payable	1,908		1,908		1,908		—		—
Derivative financial instruments	19,060		19,060		—		19,060		—

	December 31, 2012
	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	$	176,010	$	176,010	$	176,010	$	—	$	—
Interest bearing deposits with banks	111,533		111,533		111,533		—		—
Investment securities available for sale	1,868,171		1,868,171		11,835		1,850,265		6,071
Investment securities held to maturity	493,421		535,681		—		535,681		—
Non-marketable securities - FHLB and FRB stock	55,385		55,385		—		—		55,385
Loans held for sale	7,492		7,492		—		7,492		—
Loans, net	5,642,726		5,659,598		—		—		5,659,598
Accrued interest receivable	36,040		36,040		36,040		—		—
Derivative financial instruments	29,096		29,096		—		29,096		—
Financial Liabilities:
Non-interest bearing deposits	$	2,164,547	$	2,164,547	$	2,164,547	$	—	$	—
Interest bearing deposits	5,378,150		5,399,709		—		—		5,399,709
Short-term borrowings	220,602		220,683		—		—		220,683
Long-term borrowings	116,050		117,809		—		—		117,809
Junior subordinated notes issued to capital trusts	152,065		104,009		—		—		104,009
Accrued interest payable	2,828		2,828		2,828		—		—
Derivative financial instruments	29,055		29,055		—		29,055		—

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Stock Incentive Plans (Tables)

9 Months Ended

Sep. 30, 2013

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

Summary of the impact of share-based payment plans in the financial statements

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,
	2013		2012		2013		2012
Total cost of share-based payment plans during the period	$	1,388	$	1,080	$	3,860	$	3,581
Amount of related income tax benefit recognized in income	548		430		1,530		$	1,431

Additional information related to options outstanding

The following table summarizes stock options outstanding for the nine months ended September 30, 2013:

	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, 2012	2,739,753		$	27.34
Granted	211,501		27.03
Exercised	(330,832	)	25.51
Expired or cancelled	(113,290	)	30.91
Forfeited	(17,857	)	20.18
Options outstanding as of September 30, 2013	2,489,275		$	27.44	4.94	$	9,407
Options exercisable as of September 30, 2013	1,809,183		$	29.72	3.67	$	4,764

Assumptions used for options granted

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 ended September 30, 2013:

	September 30,
	2013
Risk-free interest rate	1.96		%
Expected volatility of Company’s stock	25.60		%
Expected dividend yield	1.74		%
Expected life of options	5.6 years
Weighted average fair value per option of options granted during the year	$	5.97

Summary of changes in restricted shares

The following is a summary of changes in restricted shares and units for the nine months ended September 30, 2013:

	Number of Shares and Units		Weighted Average Grant Date Fair Value
Shares Outstanding at December 31, 2012	634,211		$	18.82
Granted	270,983		26.91
Vested	(201,178	)	16.79
Forfeited	(13,983	)	20.52
Shares Outstanding at September 30, 2013	690,033		$	22.55

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Investment Securities

9 Months Ended

Sep. 30, 2013

Investments Securities [Abstract]

Investment Securities

Investment Securities

Carrying amounts and fair values of investment securities were as follows (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
September 30, 2013
Available for Sale
U.S. Government sponsored agencies and enterprises	$	50,678	$	1,849	$	—		$	52,527
States and political subdivisions	19,461		52		(201		)	19,312
Residential mortgage-backed securities	685,126		8,659		(2,509		)	691,276
Commercial mortgage-backed securities	50,944		2,502		—			53,446
Corporate bonds	265,293		927		(3,199		)	263,021
Equity securities	10,574		—		(33		)	10,541
	1,082,076		13,989		(5,942		)	1,090,123
Held to Maturity
States and political subdivisions	941,273		8,517		(3,481		)	946,309
Residential mortgage-backed securities	252,271		14,168		—			266,439
	1,193,544		22,685		(3,481		)	1,212,748
Total	$	2,275,620	$	36,674	$	(9,423	)	$	2,302,871
December 31, 2012
Available for Sale
U.S. Government sponsored agencies and enterprises	$	38,605	$	2,710	$	—		$	41,315
States and political subdivisions	679,991		45,571		(543		)	725,019
Residential mortgage-backed securities	930,413		14,038		(5,249		)	939,202
Commercial mortgage-backed securities	51,100		3,026		—			54,126
Corporate bonds	97,014		213		(553		)	96,674
Equity securities	11,398		447		(10		)	11,835
	1,808,521		66,005		(6,355		)	1,868,171
Held to Maturity
States and political subdivisions	237,563		21,039		—			258,602
Residential mortgage-backed securities	255,858		21,221		—			277,079
	493,421		42,260		—			535,681
Total	$	2,301,942	$	108,265	$	(6,355	)	$	2,403,852

Securities of states and political subdivisions with a fair value of $656.6 million were transferred from available for sale to held to maturity during the third quarter of 2013, which is the new cost basis. As of the date of the transfer, the resulting unrealized holding gain continues to be reported as a separate component of stockholders’ equity as accumulated other comprehensive income, net of tax. This unrealized gain will be amortized over the remaining life of the securities as a yield adjustment.

We do not have any meaningful direct or indirect holdings of subprime residential mortgage loans, home equity lines of credit, or any Fannie Mae or Freddie Mac preferred or common equity securities in our investment portfolio. 

The Company has no direct exposure to the State of Illinois, but approximately 27% of the state and political subdivisions portfolio consists of securities issued by municipalities located in Illinois as of September 30, 2013. Approximately 90% of such securities were general obligation issues as of September 30, 2013.

Unrealized losses on investment securities and the fair value of the related securities at September 30, 2013 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	$	9,050	$	(201	)	$	—	$	—		$	9,050	$	(201	)
Residential mortgage-backed securities	206,562		(2,040		)	49,104		(469		)	255,666		(2,509		)
Corporate bonds	147,181		(3,199		)	—		—			147,181		(3,199		)
Equity securities	10,541		(33		)	—		—			10,541		(33		)
	373,334		(5,473		)	49,104		(469		)	422,438		(5,942		)
Held to Maturity
States and political subdivisions	207,613		(3,481		)	—		—			207,613		(3,481		)
	207,613		(3,481		)	—		—			207,613		(3,481		)
Totals	$	580,947	$	(8,954	)	$	49,104	$	(469	)	$	630,051	$	(9,423	)

Unrealized losses on investment securities and the fair value of the related securities at December 31, 2012 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	$	57,540	$	(543	)	$	—	$	—		$	57,540	$	(543	)
Residential mortgage-backed securities	270,539		(5,083		)	16,434		(166		)	286,973		(5,249		)
Corporate bonds	58,241		(553		)	—		—			58,241		(553		)
Equity securities	30		(10		)	—		—			30		(10		)
Totals	$	386,350	$	(6,189	)	$	16,434	$	(166	)	$	402,784	$	(6,355	)

The total number of security positions in the investment portfolio in an unrealized loss position at September 30, 2013 was 353 compared to 117 at December 31, 2012. 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 or not the Company is more likely than not to sell the security before recovery of its cost basis.

As of September 30, 2013, 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 bonds approach their maturity date or repricing date or if market yields for such investments decline. Accordingly, as of September 30, 2013, 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 security 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,
	2013		2012			2013			2012
Realized gains	$	1	$	282		$	15		$	472
Realized losses	—		(1		)	(1		)	(4		)
Impairment charges	—		—			—			(224		)
Net gains (losses)	$	1	$	281		$	14		$	244

The amortized cost and fair value of investment securities as of September 30, 2013 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	$	—	$	—
Due after one year through five years	319,032		318,598
Due after five years through ten years	7,695		7,711
Due after ten years	8,705		8,551
Equity securities	10,574		10,541
Residential and commercial mortgage-backed securities	736,070		744,722
	1,082,076		1,090,123
Held to maturity:
Due in one year or less	28,222		28,221
Due after one year through five years	245,125		245,545
Due after five years through ten years	122,547		122,533
Due after ten years	545,379		550,010
Residential mortgage-backed securities	252,271		266,439
	1,193,544		1,212,748
Total	$	2,275,620	$	2,302,871

Investment securities available for sale with carrying amounts of $1.0 billion and $989.6 million at September 30, 2013 and December 31, 2012, respectively, were pledged as collateral on public deposits and for other purposes as required or permitted by law.

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Fair Value Measurements (Details 4) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
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 conctractual cash flows (in days)	90 days
Financial Assets:
Cash and due from banks	$ 215,017	$ 176,010
Interest bearing deposits with banks	41,700	111,533
Securities available for sale, at fair value	1,090,123	1,868,171
Investment securities held to maturity	1,193,544	493,421
Investment securities held to maturity	1,212,748	535,681
Non-marketable securities - FHLB and FRB stock	50,870	55,385
Loans held for sale	1,120	7,492
Loans, net	5,468,701	5,642,726
Derivative financial instruments	3,550	236
Financial Liabilities:
Non-interest bearing deposits	2,269,367	2,164,547
Interest bearing deposits	5,029,319	5,378,150
Short-term borrowings	240,600	220,602
Long-term borrowings	62,428	116,050
Junior subordinated notes issued to capital trusts	152,065	152,065
Derivative financial instruments	15,522	28,830
Carrying Amount
Financial Assets:
Cash and due from banks	215,017	176,010
Interest bearing deposits with banks	41,700	111,533
Securities available for sale, at fair value	1,090,123
Securities available for sale		1,868,171
Investment securities held to maturity	1,193,544
Investment securities held to maturity		493,421
Non-marketable securities - FHLB and FRB stock	50,870	55,385
Loans held for sale	1,120	7,492
Loans, net	5,468,701
Loans, net		5,642,726
Accrued interest receivable	35,938	36,040
Derivative financial instruments	19,112	29,096
Financial Liabilities:
Non-interest bearing deposits	2,269,367	2,164,547
Interest bearing deposits	5,029,319	5,378,150
Short-term borrowings	240,600	220,602
Long-term borrowings	62,428
Long-term borrowings		116,050
Junior subordinated notes issued to capital trusts	152,065	152,065
Accrued interest payable	1,908	2,828
Derivative financial instruments	19,060	29,055
Total Fair Value
Financial Assets:
Cash and due from banks	215,017	176,010
Interest bearing deposits with banks	41,700	111,533
Securities available for sale	1,090,123	1,868,171
Investment securities held to maturity	1,212,748	535,681
Non-marketable securities - FHLB and FRB stock	50,870	55,385
Loans held for sale	1,120	7,492
Loans, net	5,470,567	5,659,598
Accrued interest receivable	35,938	36,040
Derivative financial instruments	19,112	29,096
Financial Liabilities:
Non-interest bearing deposits	2,269,367	2,164,547
Interest bearing deposits	5,039,175	5,399,709
Short-term borrowings	240,595	220,683
Long-term borrowings	67,425	117,809
Junior subordinated notes issued to capital trusts	105,967	104,009
Accrued interest payable	1,908	2,828
Derivative financial instruments	19,060	29,055
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial Assets:
Cash and due from banks	215,017	176,010
Interest bearing deposits with banks	41,700	111,533
Securities available for sale	10,541	11,835
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	35,938	36,040
Derivative financial instruments	0	0
Financial Liabilities:
Non-interest bearing deposits	2,269,367	2,164,547
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	1,908	2,828
Derivative financial instruments	0	0
Recurring basis | Significant Other Observable Inputs (Level 2)
Financial Assets:
Cash and due from banks	0	0
Interest bearing deposits with banks	0	0
Securities available for sale	1,073,688	1,850,265
Investment securities held to maturity	1,212,748	535,681
Non-marketable securities - FHLB and FRB stock	0	0
Loans held for sale	1,120	7,492
Loans, net	0	0
Accrued interest receivable	0	0
Derivative financial instruments	19,112	29,096
Financial Liabilities:
Non-interest bearing deposits	0	0
Interest bearing deposits	0	0
Short-term borrowings	0	0
Long-term borrowings	0	0
Junior subordinated notes issued to capital trusts	0	0
Accrued interest payable	0	0
Derivative financial instruments	19,060	29,055
Recurring basis | Significant Unobservable Inputs (Level 3)
Financial Assets:
Cash and due from banks	0	0
Interest bearing deposits with banks	0	0
Securities available for sale	5,894	6,071
Investment securities held to maturity	0	0
Non-marketable securities - FHLB and FRB stock	50,870	55,385
Loans held for sale	0	0
Loans, net	5,470,567	5,659,598
Accrued interest receivable	0	0
Derivative financial instruments	0	0
Financial Liabilities:
Non-interest bearing deposits	0	0
Interest bearing deposits	5,039,175	5,399,709
Short-term borrowings	240,595	220,683
Long-term borrowings	67,425	117,809
Junior subordinated notes issued to capital trusts	105,967	104,009
Accrued interest payable	0	0
Derivative financial instruments	$ 0	$ 0

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Goodwill and Intangibles (Tables)

9 Months Ended

Sep. 30, 2013

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the carrying amount of core deposit and client relationship intangibles

The following table presents the changes in the carrying amount of core deposit and client relationship intangibles, gross carrying amount, accumulated amortization, and net book value as of September 30, 2013 (in thousands):

	Nine Months Ended
	September 30,
	2013
Balance at beginning of period	$	29,512
Amortization expense	(4,595		)
Balance at end of period	$	24,917
Gross carrying amount	$	61,429
Accumulated amortization	(36,512		)
Net book value	$	24,917

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
2013	$	1,489
2014	4,748
2015	4,030
2016	3,418
2017	3,071
Thereafter	8,161
	$	24,917

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Investment Securities (Details 3) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Amortized cost and fair value of investment securities by contractual maturity
Realized gains	$ 1,000	$ 282,000	$ 15,000	$ 472,000
Realized losses	0	(1,000)	(1,000)	(4,000)
Impairment charges	0	0	0	(224,000)
Net gains (losses)	1,000	281,000	14,000	244,000
Amortized Cost, Available for sale
Due in one year or less	0		0
Due after one year through five years	319,032,000		319,032,000
Due after five years through ten years	7,695,000		7,695,000
Due after ten years	8,705,000		8,705,000
Amortized Cost	1,082,076,000		1,082,076,000		1,808,521,000
Fair Value, Available for sale
Due in one year or less	0		0
Due after one year through five years	318,598,000		318,598,000
Due after five years through ten years	7,711,000		7,711,000
Due after ten years	8,551,000		8,551,000
Fair Value	1,090,123,000		1,090,123,000		1,868,171,000
Amortized Cost, Held to maturity
Due in one year or less	28,222,000		28,222,000
Due in after one year through five years	245,125,000		245,125,000
Due after five years through ten years	122,547,000		122,547,000
Due after ten years	545,379,000		545,379,000
Investment securities held to maturity	1,193,544,000		1,193,544,000		493,421,000
Fair value, Held to maturity
Due in one year or less	28,221,000		28,221,000
Due in after one year through five years	245,545,000		245,545,000
Due after five years through ten years	122,533,000		122,533,000
Due after ten years	550,010,000		550,010,000
Investment Securities held to maturity	1,212,748,000		1,212,748,000		535,681,000
Total Available for Sale and Held to Maturity Investment Securities
Amortized Cost	2,275,620,000		2,275,620,000		2,301,942,000
Fair Value	2,302,871,000		2,302,871,000		2,403,852,000
Carrying amounts of investment securities available for sale pledged as collateral	1,000,000,000		1,000,000,000		989,600,000
Equity securities
Amortized Cost, Available for sale
Amortized Cost	10,574,000		10,574,000		11,398,000
Fair Value, Available for sale
Fair Value	10,541,000		10,541,000		11,835,000
Residential and commercial mortgage-backed securities
Amortized Cost, Available for sale
Amortized Cost	736,070,000		736,070,000
Fair Value, Available for sale
Fair Value	744,722,000		744,722,000
Residential mortgage-backed securities
Amortized Cost, Available for sale
Amortized Cost	685,126,000		685,126,000		930,413,000
Fair Value, Available for sale
Fair Value	691,276,000		691,276,000		939,202,000
Amortized Cost, Held to maturity
Investment securities held to maturity	252,271,000		252,271,000		255,858,000
Fair value, Held to maturity
Investment Securities held to maturity	$ 266,439,000		$ 266,439,000		$ 277,079,000

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Deposits

9 Months Ended

Sep. 30, 2013

Deposits [Abstract]

Deposits

Deposits

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

	September 30,		December 31,
	2013		2012
Demand deposit accounts, noninterest bearing	$	2,269,367	$	2,164,547
NOW and money market accounts	2,680,127		2,747,273
Savings accounts	843,671		811,333
Certificates of deposit, $100,000 or more	838,606		1,020,033
Other certificates of deposit	666,915		799,511
Total	$	7,298,686	$	7,542,697

Certificates of deposit of $100,000 or more included $238.5 million and $294.2 million of brokered deposits at September 30, 2013 and December 31, 2012, respectively.  Brokered deposits typically consist of smaller individual time certificates that have the same liquidity characteristics and yields consistent with time certificates of $100,000 or more.

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Business Combinations

9 Months Ended

Sep. 30, 2013

Business Combinations [Abstract]

Business Combinations

Business Combinations

The following 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, assets and liabilities acquired are recorded at their estimated fair values, net of applicable income tax effects.  The excess cost over fair value of net assets acquired is recorded as goodwill.  In the event that the fair value of net assets acquired exceeds the cost, the Company will record a gain on the acquisition.

On December 28, 2012, MB Financial Bank acquired a 100% equity interest in Celtic Leasing Corp. (“Celtic”), a privately held, mid-ticket equipment leasing company. Celtic specializes in solutions for the health care, legal, technology, and manufacturing industries. MB Financial Bank estimated contingent consideration related to the transaction which may be paid out at future dates. This consideration is based on the performance of lease residual values which will be determined in future years over an earn-out period. As the consideration paid for Celtic exceeded the net assets acquired, goodwill was recorded on the acquisition. Goodwill recorded in the transaction is not tax deductible. The purchase accounting entries are preliminary for lease loans, goodwill and other intangibles, as MB Financial Bank continues to analyze the portfolios and the underlying risks and collateral values of the assets. After the purchase accounting is finalized, the impact of any future changes to the amount of contingent consideration will be reflected in the statement of operations.

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

Assets Acquired and Liabilities Assumed

(Dollar Amounts in Thousands)

	Celtic
	December 28,
	2012
ASSETS
Cash and cash equivalents	$	31,647
Investment securities available for sale	635
Loans and leases	32,933
Premises and equipment	81
Goodwill	36,300
Other intangibles	5,028
Other assets	27,323
Total assets	$	133,947
LIABILITIES
Accrued expenses and other liabilities	$	75,290
Total liabilities	$	75,290
Cash paid on acquisition	$	58,657
Net gain recorded on acquisition	$	—

On July 14, 2013, the Company and Taylor Capital Group, Inc. (“Taylor Capital”) entered into an Agreement and Plan of Merger (the "Merger Agreement") whereby the Company will acquire Taylor Capital. The Merger Agreement provides that, upon the terms and subject to the conditions set forth therein, Taylor Capital will merge with and into the Company, with the Company as the surviving corporation in the merger. Immediately following the Merger, Taylor Capital's wholly owned subsidiary bank, Cole Taylor Bank, will merge with the Company's wholly owned subsidiary bank, MB Financial Bank. Cole Taylor Bank is a commercial bank headquartered in Chicago with $5.9 billion in assets, $3.3 billion in loans and $3.7 billion in deposits as of June 30, 2013.

Subject to the terms and conditions of the Merger Agreement, at the effective time of the Merger (the "Effective Time"), each share of Taylor Capital common stock and each share of Taylor Capital nonvoting convertible preferred stock ("non-voting preferred stock") will be converted into the right to receive, promptly following the Effective Time, (1) 0.64318 of a share of the Company's common stock and (2) $4.08 in cash. All "in-the-money" Taylor Capital stock options and warrants outstanding immediately prior to the Effective Time will be canceled in exchange for a cash payment as provided in the Merger Agreement, as will all then-outstanding unvested restricted stock awards of Taylor Capital; however, the cash consideration paid 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, will be exchanged for a share of a series of preferred stock of the Company with substantially identical terms. The Merger Agreement provides that any shares of Taylor Capital's Fixed Rate Cumulative Perpetual Preferred Stock, Series B, that are not repurchased or redeemed by Taylor Capital prior to the Merger will be exchanged for a series of preferred stock of the Company with substantially identical terms and repurchased or redeemed by the Company at or promptly after the Effective Time.

The merger is subject to regulatory approvals, approval by the Company's stockholders, approval by Taylor Capital stockholders and certain other customary closing conditions and is expected to close in the first half of 2014. In addition, it is a condition to the Company's obligation to complete the Merger that the shares of Taylor Capital common stock and Taylor Capital nonvoting preferred stock whose holders have perfected appraisal rights under Delaware law represent less than nine percent of the total number of outstanding shares of Taylor Capital common stock and Taylor Capital nonvoting preferred stock.

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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash dividends declared	$ 0.32	$ 0.03

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Deposits (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Deposits, by Type [Abstract]
Demand deposit accounts, noninterest bearing	$ 2,269,367,000	$ 2,164,547,000
NOW and money market accounts	2,680,127,000	2,747,273,000
Savings accounts	843,671,000	811,333,000
Certificates of deposit, $100,000 or more	838,606,000	1,020,033,000
Other certificates of deposit	666,915,000	799,511,000
Total	7,298,686,000	7,542,697,000
Brokered deposits	$ 238,500,000	$ 294,200,000

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Loans (Details 5) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013
Activity in the allowance for loan losses, balance in allowance for loan losses and recorded investment in loans by portfolio segment and based on impairment method
Extended Maturity and Amortization and Reduction of Interest Rate	$ 3,464
Extended Maturity, Delay in Payments and Reduction of Interest Rate	205
Extended Maturity and Reduction of Interest Rate	2,318
Extended Maturity and Delay in Payments and Reduction of Amount	3,164
Extended Maturity	3,398
Delay in Payments or Reduction of Interest Rate	2,792
Total	15,341
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	42
Extended Maturity, Delay in Payments and Reduction of Interest Rate	0
Extended Maturity and Reduction of Interest Rate	1,209
Extended Maturity and Delay in Payments and Reduction of Amount	0
Extended Maturity	0
Delay in Payments or Reduction of Interest Rate	0
Total	1,251
Commercial loans collateralized by assignment of lease payments
Activity in the allowance for loan losses, balance in allowance for loan losses and recorded investment in loans by portfolio segment and based on impairment method
Extended Maturity and Amortization and Reduction of Interest Rate	0
Extended Maturity, Delay in Payments and Reduction of Interest Rate	0
Extended Maturity and Reduction of Interest Rate	0
Extended Maturity and Delay in Payments and Reduction of Amount	0
Extended Maturity	0
Delay in Payments or Reduction of Interest Rate	0
Total	0
Healthcare
Activity in the allowance for loan losses, balance in allowance for loan losses and recorded investment in loans by portfolio segment and based on impairment method
Extended Maturity and Amortization and Reduction of Interest Rate	0
Extended Maturity, Delay in Payments and Reduction of Interest Rate	0
Extended Maturity and Reduction of Interest Rate	0
Extended Maturity and Delay in Payments and Reduction of Amount	3,164
Extended Maturity	0
Delay in Payments or Reduction of Interest Rate	0
Total	3,164
Industrial
Activity in the allowance for loan losses, balance in allowance for loan losses and recorded investment in loans by portfolio segment and based on impairment method
Extended Maturity and Amortization and Reduction of Interest Rate	0
Extended Maturity, Delay in Payments and Reduction of Interest Rate	0
Extended Maturity and Reduction of Interest Rate	0
Extended Maturity and Delay in Payments and Reduction of Amount	0
Extended Maturity	2,570
Delay in Payments or Reduction of Interest Rate	0
Total	2,570
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	187
Extended Maturity, Delay in Payments and Reduction of Interest Rate	0
Extended Maturity and Reduction of Interest Rate	0
Extended Maturity and Delay in Payments and Reduction of Amount	0
Extended Maturity	601
Delay in Payments or Reduction of Interest Rate	436
Total	1,224
Retail
Activity in the allowance for loan losses, balance in allowance for loan losses and recorded investment in loans by portfolio segment and based on impairment method
Extended Maturity and Amortization and Reduction of Interest Rate	256
Extended Maturity, Delay in Payments and Reduction of Interest Rate	205
Extended Maturity and Reduction of Interest Rate	401
Extended Maturity and Delay in Payments and Reduction of Amount	0
Extended Maturity	0
Delay in Payments or Reduction of Interest Rate	0
Total	862
Office
Activity in the allowance for loan losses, balance in allowance for loan losses and recorded investment in loans by portfolio segment and based on impairment method
Extended Maturity and Amortization and Reduction of Interest Rate	0
Extended Maturity, Delay in Payments and Reduction of Interest Rate	0
Extended Maturity and Reduction of Interest Rate	0
Extended Maturity and Delay in Payments and Reduction of Amount	0
Extended Maturity	0
Delay in Payments or Reduction of Interest Rate	0
Total	0
Other
Activity in the allowance for loan losses, balance in allowance for loan losses and recorded investment in loans by portfolio segment and based on impairment method
Extended Maturity and Amortization and Reduction of Interest Rate	84
Extended Maturity, Delay in Payments and Reduction of Interest Rate	0
Extended Maturity and Reduction of Interest Rate	0
Extended Maturity and Delay in Payments and Reduction of Amount	0
Extended Maturity	0
Delay in Payments or Reduction of Interest Rate	0
Total	84
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	1,386
Extended Maturity, Delay in Payments and Reduction of Interest Rate	0
Extended Maturity and Reduction of Interest Rate	0
Extended Maturity and Delay in Payments and Reduction of Amount	0
Extended Maturity	0
Delay in Payments or Reduction of Interest Rate	618
Total	2,004
Construction real estate
Activity in the allowance for loan losses, balance in allowance for loan losses and recorded investment in loans by portfolio segment and based on impairment method
Extended Maturity and Amortization and Reduction of Interest Rate	0
Extended Maturity, Delay in Payments and Reduction of Interest Rate	0
Extended Maturity and Reduction of Interest Rate	0
Extended Maturity and Delay in Payments and Reduction of Amount	0
Extended Maturity	0
Delay in Payments or Reduction of Interest Rate	0
Total	0
Indirect vehicle
Activity in the allowance for loan losses, balance in allowance for loan losses and recorded investment in loans by portfolio segment and based on impairment method
Extended Maturity and Amortization and Reduction of Interest Rate	0
Extended Maturity, Delay in Payments and Reduction of Interest Rate	0
Extended Maturity and Reduction of Interest Rate	0
Extended Maturity and Delay in Payments and Reduction of Amount	0
Extended Maturity	0
Delay in Payments or Reduction of Interest Rate	127
Total	127
Home equity lines
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	1,509
Extended Maturity, Delay in Payments and Reduction of Interest Rate	0
Extended Maturity and Reduction of Interest Rate	708
Extended Maturity and Delay in Payments and Reduction of Amount	0
Extended Maturity	227
Delay in Payments or Reduction of Interest Rate	1,611
Total	4,055
Other consumer
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, Delay in Payments and Reduction of Interest Rate	0
Extended Maturity and Reduction of Interest Rate	0
Extended Maturity and Delay in Payments and Reduction of Amount	0
Extended Maturity	0
Delay in Payments or Reduction of Interest Rate	0
Total	$ 0

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Junior Subordinated Notes Issued to Capital Trusts (Tables)

9 Months Ended

Sep. 30, 2013

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, 2013 (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)
Junior Subordinated Notes:
Principal balance	$	30,928	$	23,196	$	5,155
Annual interest rate	3-mo LIBOR + 1.30%		3-mo LIBOR + 1.30%		3-mo LIBOR + 2.80%
Stated maturity date	December 15, 2037		October 30, 2037		January 23, 2034
Call date	December 15, 2012		October 30, 2012		January 23, 2009
Trust Preferred Securities:
Face Value	$	30,000	$	22,500	$	5,000
Annual distribution rate	3-mo LIBOR + 1.30%		3-mo LIBOR + 1.30%		3-mo LIBOR + 2.80%
Issuance date	September 2007		October 2007		December 2003
Distribution dates (1)	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, and the junior subordinated note issued by FOBB to FOBB Statutory Trust III was assumed by the Company upon completion of the acquisition.

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Derivative Financial Instruments (Details 3) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Derivative [Line Items]
Financial Assets, Net Amount Recognized	$ 3,550	$ 236
Financial Assets, Financial Instruments	(2,562)	(230)
Financial Assets, Collateral	0	0
Financial Assets, Net Amount	988	6
Financial Liabilities, Net Amount Recognized	15,522	28,830
Financial Liabilities, Financial Instruments	(2,562)	(230)
Financial Liabilities, Collateral	(12,915)	(28,545)
Financial Liabilities, Net Amount	45	55
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	240,600	208,242
Repurchase Agreements, Financial Liabilities, Financial Instruments	0	0
Repurchase Agreements, Financial Liabilities, Financial Instruments	(240,600)	(208,242)
Repurchase Agreements, Financial Liabilities, Collateral	0	0
Total Financial Assets, Net Amount Recognized	3,550	236
Total Financial Assets, Financial Instruments	(2,562)	(230)
Total Financial Assets, Collateral	0	0
Total Financial Assets, Net Amount	988	6
Total Financial Liabilities, Net Amount Recognized	256,122	237,072
Total Financial Liabilities, Financial Instruments	(2,562)	(230)
Total Financial Liabilities, Collateral	(253,515)	(236,787)
Total Financial Liabilities, Net Amount	45	55
Counterparty A
Derivative [Line Items]
Financial Assets, Net Amount Recognized	440	68
Financial Assets, Financial Instruments	(440)	(68)
Financial Assets, Collateral	0	0
Financial Assets, Net Amount	0	0
Financial Liabilities, Net Amount Recognized	12,976	25,497
Financial Liabilities, Financial Instruments	(440)	(68)
Financial Liabilities, Collateral	(12,536)	(25,429)
Financial Liabilities, Net Amount	0	0
Counterparty B
Derivative [Line Items]
Financial Assets, Net Amount Recognized	1,090	84
Financial Assets, Financial Instruments	(551)	(84)
Financial Assets, Collateral	0	0
Financial Assets, Net Amount	539	0
Financial Liabilities, Net Amount Recognized	551	633
Financial Liabilities, Financial Instruments	(551)	(84)
Financial Liabilities, Collateral	0	(549)
Financial Liabilities, Net Amount	0	0
Counterparty C
Derivative [Line Items]
Financial Assets, Net Amount Recognized	1,570	36
Financial Assets, Financial Instruments	(1,570)	(36)
Financial Assets, Collateral	0	0
Financial Assets, Net Amount	0	0
Financial Liabilities, Net Amount Recognized	1,949	2,305
Financial Liabilities, Financial Instruments	(1,570)	(36)
Financial Liabilities, Collateral	(379)	(2,269)
Financial Liabilities, Net Amount	0	0
Other counterparties
Derivative [Line Items]
Financial Assets, Net Amount Recognized	450	48
Financial Assets, Financial Instruments	(1)	(42)
Financial Assets, Collateral	0	0
Financial Assets, Net Amount	449	6
Financial Liabilities, Net Amount Recognized	46	395
Financial Liabilities, Financial Instruments	(1)	(42)
Financial Liabilities, Collateral	0	(298)
Financial Liabilities, Net Amount	$ 45	$ 55

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Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Financial assets and financial liabilities measured at fair value on a recurring basis
Loans held for sale	$ 1,120		$ 7,492
Derivative financial instruments, assets	3,550		236
Derivative financial instrument, liabilities	15,522		28,830
Recurring basis | Total Fair Value
Financial assets and financial liabilities measured at fair value on a recurring basis
Loans held for sale	1,120		7,492
Assets held in trust for deferred compensation	10,077		7,746
Derivative financial instruments, assets	19,112		29,096
Other liabilities	9,892		7,746
Derivative financial instrument, liabilities	19,060		29,055
Recurring basis | Total Fair Value | U.S. Government sponsored agencies and enterprises
Financial assets and financial liabilities measured at fair value on a recurring basis
Securities available for sale	52,527		41,315
Recurring basis | Total Fair Value | States and political subdivisions
Financial assets and financial liabilities measured at fair value on a recurring basis
Securities available for sale	19,312		725,019
Recurring basis | Total Fair Value | Residential mortgage-backed securities
Financial assets and financial liabilities measured at fair value on a recurring basis
Securities available for sale	691,276		939,202
Recurring basis | Total Fair Value | Commercial mortgage-backed securities
Financial assets and financial liabilities measured at fair value on a recurring basis
Securities available for sale	53,446		54,126
Recurring basis | Total Fair Value | Corporate bonds
Financial assets and financial liabilities measured at fair value on a recurring basis
Securities available for sale	263,021		96,674
Recurring basis | Total Fair Value | Equity securities
Financial assets and financial liabilities measured at fair value on a recurring basis
Securities available for sale	10,541		11,835
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
Securities available for sale	10,541		11,835
Loans held for sale	0		0
Assets held in trust for deferred compensation	10,077		7,746
Derivative financial instruments, assets	0		0
Other liabilities	9,892	[1]	7,746	[1]
Derivative financial instrument, liabilities	0		0
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
Securities available for sale	10,541		11,835
Recurring basis | Significant Other Observable Inputs (Level 2)
Financial assets and financial liabilities measured at fair value on a recurring basis
Securities available for sale	1,073,688		1,850,265
Loans held for sale	1,120		7,492
Derivative financial instruments, assets	19,112		29,096
Derivative financial instrument, liabilities	19,060		29,055
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
Securities available for sale	52,527		41,315
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
Securities available for sale	19,312		725,019
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
Securities available for sale	690,546		938,354
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
Securities available for sale	53,446		54,126
Recurring basis | Significant Other Observable Inputs (Level 2) | Corporate bonds
Financial assets and financial liabilities measured at fair value on a recurring basis
Securities available for sale	257,857		91,451
Recurring basis | Significant Unobservable Inputs (Level 3)
Financial assets and financial liabilities measured at fair value on a recurring basis
Securities available for sale	5,894		6,071
Loans held for sale	0		0
Derivative financial instruments, assets	0		0
Derivative financial instrument, liabilities	0		0
Recurring basis | Significant Unobservable Inputs (Level 3) | Residential mortgage-backed securities
Financial assets and financial liabilities measured at fair value on a recurring basis
Securities available for sale	730		848
Recurring basis | Significant Unobservable Inputs (Level 3) | Corporate bonds
Financial assets and financial liabilities measured at fair value on a recurring basis
Securities available for sale	$ 5,164		$ 5,223

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

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Junior Subordinated Notes Issued to Capital Trusts

9 Months Ended

Sep. 30, 2013

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, 2013 (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)
Junior Subordinated Notes:
Principal balance	$	30,928	$	23,196	$	5,155
Annual interest rate	3-mo LIBOR + 1.30%		3-mo LIBOR + 1.30%		3-mo LIBOR + 2.80%
Stated maturity date	December 15, 2037		October 30, 2037		January 23, 2034
Call date	December 15, 2012		October 30, 2012		January 23, 2009
Trust Preferred Securities:
Face Value	$	30,000	$	22,500	$	5,000
Annual distribution rate	3-mo LIBOR + 1.30%		3-mo LIBOR + 1.30%		3-mo LIBOR + 2.80%
Issuance date	September 2007		October 2007		December 2003
Distribution dates (1)	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, and the junior subordinated note issued by FOBB to FOBB Statutory Trust III was assumed by the Company upon completion of the acquisition.

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 on a date no earlier than the call dates noted in the table above.  Prior to these respective redemption dates, the junior subordinated notes could have been redeemed by the Company (in which case the trust preferred securities would also be redeemed) after the occurrence of: certain events that would have a negative tax effect on the Company or the trusts, would cause the trust preferred securities to no longer qualify as Tier 1 capital, or would result in a trust being treated as an investment company.  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, constitutes 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 stock and generally may not repurchase its stock.

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Goodwill and Intangibles

9 Months Ended

Sep. 30, 2013

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 consists of goodwill, and core deposit and client relationship intangibles. 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 unit with the fair value of the reporting unit.

The Company's annual assessment date is as of December 31. No impairment losses were recognized during the three or nine months ended September 30, 2013 or 2012. Goodwill is tested for impairment at the reporting unit level. All of our goodwill is allocated to MB Financial, Inc., which is the Company's only applicable reporting unit for purposes of testing goodwill impairment.  The carrying amount of goodwill was $423.4 million at September 30, 2013 and December 31, 2012.

The Company has other intangible assets consisting of core deposit and client relationship intangibles that had a remaining weighted average amortization period of approximately four years as of September 30, 2013.

The following table presents the changes in the carrying amount of core deposit and client relationship intangibles, gross carrying amount, accumulated amortization, and net book value as of September 30, 2013 (in thousands):

	Nine Months Ended
	September 30,
	2013
Balance at beginning of period	$	29,512
Amortization expense	(4,595		)
Balance at end of period	$	24,917
Gross carrying amount	$	61,429
Accumulated amortization	(36,512		)
Net book value	$	24,917

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

Year ending December 31,	Amount
2013	$	1,489
2014	4,748
2015	4,030
2016	3,418
2017	3,071
Thereafter	8,161
	$	24,917

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Stock Incentive Plans

9 Months Ended

Sep. 30, 2013

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,
	2013		2012		2013		2012
Total cost of share-based payment plans during the period	$	1,388	$	1,080	$	3,860	$	3,581
Amount of related income tax benefit recognized in income	548		430		1,530		$	1,431

The Company adopted the Omnibus Incentive Plan (the “Omnibus Plan”) in 1997.  In June 2011, the Company’s stockholders approved an amendment and restatement of the Omnibus Plan to add 2,300,000 authorized shares for a total of 8,300,000 shares of common stock for issuance to directors, officers, and employees of the Company or any of its subsidiaries.  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.  As of September 30, 2013, there were 1,617,262 shares available for future grants.

Annual equity-based incentive awards are typically granted to selected officers and employees mid-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 ended September 30, 2013:

	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, 2012	2,739,753		$	27.34
Granted	211,501		27.03
Exercised	(330,832	)	25.51
Expired or cancelled	(113,290	)	30.91
Forfeited	(17,857	)	20.18
Options outstanding as of September 30, 2013	2,489,275		$	27.44	4.94	$	9,407
Options exercisable as of September 30, 2013	1,809,183		$	29.72	3.67	$	4,764

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 ended September 30, 2013:

	September 30,
	2013
Risk-free interest rate	1.96		%
Expected volatility of Company’s stock	25.60		%
Expected dividend yield	1.74		%
Expected life of options	5.6 years
Weighted average fair value per option of options granted during the year	$	5.97

The total intrinsic value of options exercised during the nine months ended September 30, 2013 and 2012 was $929 thousand and $203 thousand, respectively.

The following is a summary of changes in restricted shares and units for the nine months ended September 30, 2013:

	Number of Shares and Units		Weighted Average Grant Date Fair Value
Shares Outstanding at December 31, 2012	634,211		$	18.82
Granted	270,983		26.91
Vested	(201,178	)	16.79
Forfeited	(13,983	)	20.52
Shares Outstanding at September 30, 2013	690,033		$	22.55

The Company issued 56,752 and 65,333 market-based restricted stock units in 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 Company issued 92,717 shares and 66,193 shares of market-based restricted stock in 2011 and 2010, respectively.  The market component of the vesting terms for each award requires that, for ten consecutive trading days, the closing price of the Company’s stock be at least $27.00 for awards issued in 2011 and $25.80 for awards issued in 2010.  The market components for awards issued in 2011 and 2010 have been satisfied as of September 30, 2013. Awards issued in 2011 will vest in full in 2014, on the third anniversary of the grant date. Awards issued in 2010 vested in full in 2013. A Monte Carlo simulation model was used to value the market-based restricted stock awards at the time of issuance.

Effective January 1, 2010, the Company began issuing shares of common stock under the Omnibus Plan as Salary Stock, classified as other stock-based awards, to certain executive officers. This stock is fully vested as of the grant date and the related expense is included in salaries and employee benefits on the Consolidated Statements of Operations. Holders of Salary Stock have all of the rights of a stockholder, including the right to vote the shares and the right to receive any dividends that may be paid thereon. As a condition of receiving the Salary Stock, the holders entered into agreements with the Company providing that they may not sell or otherwise transfer the shares of Salary Stock for two years, except in the event of disability or death.  During the three months ended March 31, 2013, the Company issued 876 shares of Salary Stock at a weighted average issuance price of $22.39 and subsequently ended the issuance of new shares of Salary Stock.

As of September 30, 2013, there was $14.2 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, 2013, the weighted-average period over which the unrecognized compensation expense is expected to be recognized was approximately 2.9 years.

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2013

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, 2013 and December 31, 2012, the following financial instruments were outstanding, the contractual amounts of which represent off-balance sheet credit risk (in thousands):

	Contractual Amount
	September 30, 2013		December 31, 2012
Commitments to extend credit:
Home equity lines	$	216,992	$	239,771
Other commitments	1,139,255		911,166
Letters of credit:
Standby	70,720		66,247
Commercial	2,705		465

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, 2013, the maximum remaining term for any standby letters of credit was December 31, 2020.  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, 2013, the aggregate contractual amount of these letters of credit, which represents the maximum potential amount of future payments that the Company would be obligated to pay, increased $6.7 million to $73.4 million from $66.7 million at December 31, 2012.  Of the $73.4 million in commitments outstanding at September 30, 2013, approximately $52.6 million of the letters of credit have been issued or renewed since December 31, 2012.

Letters of credit issued on behalf of bank customers may be done on either a secured, partially secured or an unsecured basis.  If a letter of credit is secured or partially secured, the collateral can take various forms including bank accounts, investments, fixed assets, inventory, accounts receivable or real estate, among other things.  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, 2013, the Company had approximately $1.4 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, 2013, approximately 27% 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, 2013. The distribution of commitments to extend credit approximates the distribution of loans outstanding.  Standby letters of credit are granted primarily to commercial borrowers. Lease banking provides banking services to lessors located throughout the United States. Our leasing subsidiaries originate leases to companies located through the United States.

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

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Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Oct. 30, 2013
Entity Registrant Name	MB FINANCIAL INC /MD
Entity Central Index Key	0001139812
Document Type	10-Q
Document Period End Date	Sep. 30, 2013
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		54,961,540
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q3

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Fair Value Measurements

9 Months Ended

Sep. 30, 2013

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 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.

Loans Held for Sale. The fair value of loans held for sale is determined using quoted secondary market prices and classified as level 2.

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. 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.

The following table summarizes financial assets and financial liabilities measured at fair value on a recurring basis as of September 30, 2013 and December 31, 2012, 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, 2013
Financial assets
Securities available for sale:
U.S Government sponsored agencies and enterprises	$	52,527	$	—	$	52,527	$	—
States and political subdivisions	19,312		—		19,312		—
Residential mortgage-backed securities	691,276		—		690,546		730
Commercial mortgage-backed securities	53,446		—		53,446		—
Corporate bonds	263,021		—		257,857		5,164
Equity securities	10,541		10,541		—		—
Loans held for sale	1,120		—		1,120		—
Assets held in trust for deferred compensation	10,077		10,077		—		—
Derivative financial instruments	19,112		—		19,112		—
Financial liabilities
Other liabilities (1)	9,892		9,892		—		—
Derivative financial instruments	19,060		—		19,060		—
December 31, 2012
Financial assets
Securities available for sale:
U.S. Government sponsored agencies and enterprises	$	41,315	$	—	$	41,315	$	—
States and political subdivisions	725,019		—		725,019		—
Residential mortgage-backed securities	939,202		—		938,354		848
Commercial mortgage-backed securities	54,126		—		54,126		—
Corporate bonds	96,674		—		91,451		5,223
Equity securities	11,835		11,835		—		—
Loans held for sale	7,492		—		7,492		—
Assets held in trust for deferred compensation	7,746		7,746		—		—
Derivative financial instruments	29,096		—		29,096		—
Financial liabilities
Other liabilities (1)	7,746		7,746		—		—
Derivative financial instruments	29,055		—		29,055		—

(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		Valuation	Unobservable
	September 30, 2013		Technique	Input	Range
Residential mortgage-backed securities	$	730	Discounted cash flows	Constant pre-payment rates
				(CPR) assumption	1% - 3% CPR
Corporate bonds	5,164		Discounted cash flows	Credit assumption	20% Loss

The Company did not have any transfers between Level 1 and Level 2 of the fair value hierarchy during the three and nine months ended September 30, 2013. 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,
(in thousands)	2013			2012
Balance, beginning of period	$	6,071		$	6,992
Other comprehensive income	(59		)	89
Principal payments	(118		)	(846		)
Impairment charge	—			(117		)
Balance, ending of period	$	5,894		$	6,118

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 (approximately 85%), 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 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, 2013 and December 31, 2012 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, 2013
Financial assets:
Impaired loans	$	84,500	$	—	$	—	$	84,500
Non-financial assets:
Foreclosed assets	57,009		—		—		57,009
December 31, 2012
Financial assets:
Impaired loans	$	62,258	$	—	$	—	$	62,258
Non-financial assets:
Foreclosed assets	60,228		—		—		60,228
Long-lived assets	2,314		—		—		2,314

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, 2013		Technique	Input	Range
Impaired loans	$	84,500	Appraisal of collateral	Appraisal adjustments - sales costs	5% - 10%
Foreclosed assets	57,009		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 methodologies for other financial assets and financial liabilities are discussed below:

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 and interest bearing deposits with banks: 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 Held for Sale: The fair value of the loans held for sale is determined using quoted secondary market prices and classified as level 2.

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.

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, 2013
	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	$	215,017	$	215,017	$	215,017	$	—	$	—
Interest bearing deposits with banks	41,700		41,700		41,700		—		—
Investment securities available for sale	1,090,123		1,090,123		10,541		1,073,688		5,894
Investment securities held to maturity	1,193,544		1,212,748		—		1,212,748		—
Non-marketable securities - FHLB and FRB stock	50,870		50,870		—		—		50,870
Loans held for sale	1,120		1,120		—		1,120		—
Loans, net	5,468,701		5,470,567		—		—		5,470,567
Accrued interest receivable	35,938		35,938		35,938		—		—
Derivative financial instruments	19,112		19,112		—		19,112		—
Financial Liabilities:
Noninterest bearing deposits	$	2,269,367	$	2,269,367	$	2,269,367	$	—	$	—
Interest bearing deposits	5,029,319		5,039,175		—		—		5,039,175
Short-term borrowings	240,600		240,595		—		—		240,595
Long-term borrowings	62,428		67,425		—		—		67,425
Junior subordinated notes issued to capital trusts	152,065		105,967		—		—		105,967
Accrued interest payable	1,908		1,908		1,908		—		—
Derivative financial instruments	19,060		19,060		—		19,060		—

	December 31, 2012
	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	$	176,010	$	176,010	$	176,010	$	—	$	—
Interest bearing deposits with banks	111,533		111,533		111,533		—		—
Investment securities available for sale	1,868,171		1,868,171		11,835		1,850,265		6,071
Investment securities held to maturity	493,421		535,681		—		535,681		—
Non-marketable securities - FHLB and FRB stock	55,385		55,385		—		—		55,385
Loans held for sale	7,492		7,492		—		7,492		—
Loans, net	5,642,726		5,659,598		—		—		5,659,598
Accrued interest receivable	36,040		36,040		36,040		—		—
Derivative financial instruments	29,096		29,096		—		29,096		—
Financial Liabilities:
Non-interest bearing deposits	$	2,164,547	$	2,164,547	$	2,164,547	$	—	$	—
Interest bearing deposits	5,378,150		5,399,709		—		—		5,399,709
Short-term borrowings	220,602		220,683		—		—		220,683
Long-term borrowings	116,050		117,809		—		—		117,809
Junior subordinated notes issued to capital trusts	152,065		104,009		—		—		104,009
Accrued interest payable	2,828		2,828		2,828		—		—
Derivative financial instruments	29,055		29,055		—		29,055		—

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Fair Value Measurements (Details 3) (Nonrecurring basis, USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Total Fair Value
Financial Assets:
Impaired loans	$ 84,500	$ 62,258
Foreclosed assets	57,009	60,228
Non-financial long-lived assets		2,314
Significant Unobservable Inputs (Level 3)
Financial Assets:
Impaired loans	84,500	62,258
Foreclosed assets	57,009	60,228
Non-financial long-lived assets		$ 2,314

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Fair Value Measurements (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended							9 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 Significant Unobservable Inputs (Level 3) Recurring basis	Sep. 30, 2012 Significant Unobservable Inputs (Level 3) Recurring basis	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) Recurring basis	Sep. 30, 2013 Significant Unobservable Inputs (Level 3) Recurring basis Residential mortgage-backed securities	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) Recurring basis Residential mortgage-backed securities	Sep. 30, 2013 Significant Unobservable Inputs (Level 3) Recurring basis Corporate bonds	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) Recurring basis Corporate bonds	Sep. 30, 2013 Significant Unobservable Inputs (Level 3) Recurring basis Minimum Residential mortgage-backed securities	Sep. 30, 2013 Significant Unobservable Inputs (Level 3) Recurring basis Maximum Residential mortgage-backed securities	Sep. 30, 2013 Significant Unobservable Inputs (Level 3) Nonrecurring basis Minimum	Sep. 30, 2013 Significant Unobservable Inputs (Level 3) Nonrecurring basis Maximum
Assets measured at fair value on a nonrecurring basis
Constant prepayment rates (as a percent)											1.00%	3.00%
Credit assumption (as a percent)									20.00%
Appraisal adjustment impaired loans (as a percent)													5.00%	10.00%
Appraisal adjustment foreclosed assets (as a percent)													5.00%	10.00%
Securities available for sale				$ 5,894		$ 6,071	$ 730	$ 848	$ 5,164	$ 5,223
Financial assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Balance at the beginning of the period		6,071	6,992
Other comprehensive income		(59)	89
Principal payments		(118)	(846)
Impairment Charge				0	(117)
Balance at the end of the period	$ 5,894	$ 5,894	$ 6,118
Fair value assumption, allowance for impaired real estate loans percentage	85.00%