First Midwest Bancorp (ONBPP) 10-Q 4 Nov 16 2016 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2016	Oct. 31, 2016
Document and Entity Information [Abstract]
Entity Registrant Name	FIRST MIDWEST BANCORP INC
Document Type	10-Q
Current Fiscal Year End Date	--12-31
Entity Common Stock, Shares Outstanding		81,325,864
Amendment Flag	false
Entity Central Index Key	702,325
Entity Filer Category	Large Accelerated Filer
Document Period End Date	Sep. 30, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q3

Consolidated Statements of Fina

Consolidated Statements of Financial Condition - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Assets
Cash and due from banks	$ 139,538	$ 114,587
Interest-bearing deposits in other banks	362,153	266,615
Trading securities, at fair value	18,351	16,894
Securities available-for-sale, at fair value	1,964,030	1,306,636
Securities held-to-maturity, at amortized cost	20,337	23,152
Federal Home Loan Bank (FHLB) and Federal Reserve Bank (FRB) stock, at cost	53,506	39,306
Loans	8,171,782	7,161,715
Allowance for loan losses	(85,308)	(73,630)
Net loans	8,086,474	7,088,085
Other real estate owned (OREO)	28,049	27,782
Premises, furniture, and equipment, net	82,443	122,278
Investment in bank-owned life insurance (BOLI)	219,064	209,601
Goodwill and other intangible assets	367,961	339,277
Accrued interest receivable and other assets	236,291	178,463
Total assets	11,578,197	9,732,676
Liabilities
Noninterest-bearing deposits	2,766,265	2,414,454
Interest-bearing deposits	6,339,839	5,683,284
Total deposits	9,106,104	8,097,738
Borrowed funds	639,539	165,096
Senior and subordinated debt	309,444	201,208
Accrued interest payable and other liabilities	253,846	122,366
Total liabilities	10,308,933	8,586,408
Stockholders' Equity
Common stock	913	882
Additional paid-in capital	496,918	446,672
Retained earnings	1,003,271	953,516
Accumulated other comprehensive loss, net of tax	(13,402)	(28,389)
Treasury stock, at cost	(218,436)	(226,413)
Total stockholders' equity	1,269,264	1,146,268
Total liabilities and stockholders' equity	$ 11,578,197	$ 9,732,676
Stockholders' Equity, Number of Shares, Par Value, and Other Disclosures
Par Value, common stock (in Dollars per share)	$ 0.01	$ 0.01
Shares authorized, preferred stock (in Shares)	1,000,000	1,000,000
Shares authorized, common stock (in Shares)	150,000,000	150,000,000
Shares issued, common stock (in Shares)	91,281,000	88,228,000
Shares outstanding, common stock (in Shares)	81,324,000	77,952,000
Treasury shares, common stock (in Shares)	9,957,000	10,276,000

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income - USD ($) shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Interest Income
Loans	$ 87,505,000	$ 75,522,000	$ 252,486,000	$ 224,739,000
Investment securities	9,629,000	7,723,000	27,550,000	23,839,000
Other short-term investments	772,000	1,047,000	1,968,000	2,739,000
Total interest income	97,906,000	84,292,000	282,004,000	251,317,000
Interest Expense
Deposits	2,520,000	2,329,000	7,387,000	7,256,000
Borrowed funds	1,782,000	928,000	4,597,000	1,064,000
Senior and subordinated debt	2,632,000	3,133,000	8,353,000	9,411,000
Total interest expense	6,934,000	6,390,000	20,337,000	17,731,000
Net interest income	90,972,000	77,902,000	261,667,000	233,586,000
Provision for loan losses	9,998,000	4,100,000	25,676,000	16,652,000
Net interest income after provision for loan losses	80,974,000	73,802,000	235,991,000	216,934,000
Noninterest Income
Service charges on deposit accounts	10,708,000	10,519,000	30,350,000	29,676,000
Wealth management fees	8,495,000	7,222,000	24,696,000	21,669,000
Card-based fees	7,332,000	6,868,000	21,642,000	20,223,000
Mortgage banking income	3,394,000	1,402,000	6,625,000	3,964,000
Other service charges, commissions, and fees	8,537,000	7,107,000	24,681,000	17,800,000
Net gain on sale-leaseback transaction	5,509,000	0	5,509,000	0
Net securities gains	187,000	524,000	1,097,000	1,551,000
Other income	1,691,000	1,372,000	5,001,000	5,220,000
Total noninterest income	45,853,000	35,014,000	119,601,000	100,103,000
Noninterest Expense
Salaries and employee benefits	46,372,000	41,361,000	137,233,000	122,371,000
Net occupancy and equipment expense	10,755,000	9,406,000	30,380,000	29,464,000
Professional services	6,772,000	6,172,000	17,984,000	16,603,000
Technology and related costs	3,881,000	3,673,000	11,251,000	10,887,000
Net OREO expense	313,000	1,290,000	2,099,000	4,355,000
Other expenses	13,623,000	12,463,000	41,074,000	36,793,000
Acquisition and integration related expenses	1,172,000	0	6,810,000	0
Total noninterest expense	82,888,000	74,365,000	246,831,000	220,473,000
Income before income tax expense	43,939,000	34,451,000	108,761,000	96,564,000
Income tax expense	15,537,000	11,167,000	37,130,000	30,824,000
Net income	$ 28,402,000	$ 23,284,000	$ 71,631,000	$ 65,740,000
Per Common Share Data
Basic earnings per common share (in Dollars per share)	$ 0.35	$ 0.30	$ 0.89	$ 0.84
Diluted earnings per common share (in Dollars per share)	0.35	0.30	0.89	0.84
Dividends declared per common share (in Dollars per share)	$ 0.09	$ 0.09	$ 0.27	$ 0.27
Weighted-average common shares outstanding (in Shares)	80,396	77,106	79,589	77,038
Weighted-average diluted common shares outstanding (in Shares)	80,409	77,119	79,602	77,051

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 28,402	$ 23,284	$ 71,631	$ 65,740
Unrealized holding (losses) gains:
Before tax	(6,695)	6,126	21,671	748
Tax effect	2,676	(2,454)	(8,665)	(312)
Net of tax	(4,019)	3,672	13,006	436
Reclassification of net gains included in net income:
Before tax	187	524	1,097	1,551
Tax effect	(75)	(214)	(439)	(634)
Net of tax	112	310	658	917
Net unrealized holding (losses) gains	(4,131)	3,362	12,348	(481)
Derivative Instruments
Before tax	(779)	3,420	4,420	870
Tax effect	311	(1,368)	(1,781)	(352)
Net of tax	(468)	2,052	2,639	518
Total other comprehensive (loss) income	(4,599)	5,414	14,987	37
Total comprehensive income	$ 23,803	$ 28,698	$ 86,618	$ 65,777

Consolidated Statements of Com5

Consolidated Statements of Comprehensive Income - AOCI - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Other comprehensive income	$ 14,987	$ 37
Accumulated Unrealized Gain (Loss) on Securities Available- for-Sale
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(10,271)	(2,950)
Other comprehensive income	12,348	(481)
Ending balance	2,077	(3,431)
Accumulated Unrealized Gain (Loss) on Derivative Instruments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(2,468)	(1,138)
Other comprehensive income	2,639	518
Ending balance	171	(620)
Unrecognized Net Pension Costs
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(15,650)	(11,767)
Other comprehensive income	0	0
Ending balance	(15,650)	(11,767)
Total Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(28,389)	(15,855)
Other comprehensive income	14,987	37
Ending balance	$ (13,402)	$ (15,818)

Consolidated Statements of Chan

Consolidated Statements of Changes In Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
Balance Beginning at Dec. 31, 2014	$ 1,100,775	$ 882	$ 449,798	$ 899,516	$ (15,855)	$ (233,566)
Balance Beginning (in Shares) at Dec. 31, 2014		77,695
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	65,740			65,740
Other comprehensive income	37				37
Common dividends declared ($0.27 per common share)	(21,047)			(21,047)
Purchase of treasury stock (in Shares)		(7)
Purchase of treasury stock	(120)					(120)
Restricted stock activity	(10,108)		(10,108)
Restricted stock activity (in Shares)		255
Treasury stock issued to benefit plans	169		(112)			281
Treasury stock issued to benefit plans (in Shares)		(1)
Share-based compensation expense	12,223		5,459			6,764
Balance Ending at Sep. 30, 2015	1,147,669	$ 882	445,037	944,209	(15,818)	(226,641)
Balance Ending (in Shares) at Sep. 30, 2015		77,942
Balance Beginning at Dec. 31, 2015	$ 1,146,268	$ 882	446,672	953,516	(28,389)	(226,413)
Balance Beginning (in Shares) at Dec. 31, 2015	77,952	77,952
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 71,631			71,631
Other comprehensive income	14,987				14,987
Common dividends declared ($0.27 per common share)	(21,876)			(21,876)
Acquisition, net of issuance costs	54,896	$ 31	54,865
Acquisition, net of issuance costs (in Shares)		3,042
Common stock issued	169		169
Common stock issued (in Shares)		10
Restricted stock activity	(2,548)		(10,610)			8,062
Restricted stock activity (in Shares)		326
Treasury stock issued to benefit plans	(106)		(21)			(85)
Treasury stock issued to benefit plans (in Shares)		(6)
Share-based compensation expense	5,843		5,843
Balance Ending at Sep. 30, 2016	$ 1,269,264	$ 913	$ 496,918	$ 1,003,271	$ (13,402)	$ (218,436)
Balance Ending (in Shares) at Sep. 30, 2016	81,324	81,324

Consolidated Statements of Cha7

Consolidated Statements of Changes In Stockholders' Equity (Parentheticals) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Stockholders' Equity [Abstract]
Dividends declared per common share (in Dollars per share)	$ 0.09	$ 0.09	$ 0.27	$ 0.27

Condensed Consolidated Stateme8

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Statement of Cash Flows [Abstract]
Net cash provided by operating activities	$ 104,235	$ 93,423
Investing Activities
Proceeds from maturities, repayments, and calls of securities available-for-sale	263,243	216,900
Proceeds from sales of securities available-for-sale	42,794	57,255
Purchases of securities available-for-sale	(824,883)	(241,300)
Proceeds from maturities, repayments, and calls of securities held-to-maturity	4,695	4,016
Purchases of securities held-to-maturity	(16)	(1,184)
Purchases of FHLB stock	(12,651)	(1,190)
Net increase in loans	(630,012)	(213,488)
Proceeds from claims on BOLI, net of premiums paid	1,597	1,095
Proceeds from sales of OREO	6,069	13,820
Proceeds from sales of premises, furniture, and equipment	150,747	195
Purchases of premises, furniture, and equipment	(12,320)	(6,591)
Net cash received from acquisitions	57,347	0
Net cash used in investing activities	(953,390)	(170,472)
Financing Activities
Net increase in deposit accounts	413,445	408,692
Net increase in borrowed funds	472,027	31,949
Purchase of treasury stock	0	(120)
Net proceeds from the issuance of subordinated notes	146,484	0
Payments for the maturity of subordinated debt	(38,500)	0
Cash dividends paid	(21,885)	(20,132)
Restricted stock activity	(2,318)	(2,853)
Excess tax benefit related to share-based compensation	391	794
Net cash provided by financing activities	969,644	418,330
Net increase in cash and cash equivalents	120,489	341,281
Cash and cash equivalents at beginning of period	381,202	606,262
Cash and cash equivalents at end of period	501,691	947,543
Supplemental Disclosures of Cash Flow Information:
Income taxes paid	14,645	12,787
Interest paid to depositors and creditors	17,656	14,931
Dividends declared, but unpaid	7,241	7,137
Common stock issued for acquisitions, net of issuance costs	54,896	0
Non-cash transfers of loans to OREO	3,894	11,956
Non-cash transfers of loans held-for-investment to loans held-for-sale	$ 77,030	$ 32,902

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2016
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation – The accompanying unaudited condensed consolidated interim financial statements ("consolidated financial statements") of First Midwest Bancorp, Inc. (the " Company "), a Delaware corporation, were prepared in accordance with the rules and regulations of the Securities and Exchange Commission (" SEC ") for quarterly reports on Form 10-Q and reflect all adjustments that management deems necessary for the fair presentation of the financial position and results of operations for the periods presented. The results of operations for the quarter and nine months ended September 30, 2016 are not necessarily indicative of the results that may be expected for the year ending December 31, 2016 . The accounting and reporting policies of the Company and its subsidiaries conform to U.S. generally accepted accounting principles (" GAAP ") and general practices within the banking industry. The accompanying consolidated financial statements do not include certain information and note disclosures required by GAAP for complete annual financial statements. Therefore, these financial statements should be read in conjunction with the Company 's 2015 Annual Report on Form 10-K (" 2015 10-K"). The Company uses the accrual basis of accounting for financial reporting purposes. Certain reclassifications were made to prior year amounts to conform to the current year presentation. Use of Estimates – The preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Although these estimates and assumptions are based on the best available information, actual results could differ from those estimates. Principles of Consolidation – The accompanying consolidated financial statements include the financial position and results of operations of the Company and its subsidiaries after elimination of all significant intercompany accounts and transactions. Assets held in a fiduciary or agency capacity are not assets of the Company or its subsidiaries and are not included in the consolidated financial statements. The accounting policies related to business combinations, loans, the allowance for credit losses, and derivative financial instruments are presented below. For a summary of all other significant accounting policies, see Note 1, "Summary of Significant Accounting Policies," in the Company 's 2015 10-K. Business Combinations – Business combinations are accounted for under the acquisition method of accounting. Assets acquired and liabilities assumed are recorded at their estimated fair values as of the date of acquisition, with any excess of the purchase price of the acquisition over the fair value of the identifiable net tangible and intangible assets acquired recorded as goodwill. Alternatively, a gain is recorded if the fair value of assets purchased exceeds the fair value of liabilities assumed and consideration paid. The results of operations of the acquired business are included in the Condensed Consolidated Statements of Income from the effective date of the acquisition. Loans – Loans held-for-investment are loans that the Company intends to hold until they are paid in full and are carried at the principal amount outstanding, including certain net deferred loan origination fees. Loan origination fees, commitment fees, and certain direct loan origination costs are deferred, and the net amount is amortized as a yield adjustment over the contractual life of the related loans or commitments and included in interest income. Fees related to letters of credit are amortized into fee income over the contractual life of the commitment. Other credit-related fees are recognized as fee income when earned. The Company 's net investment in direct financing leases is included in loans and consists of future minimum lease payments and estimated residual values, net of unearned income. Interest income on loans is accrued based on principal amounts outstanding. Loans held-for-sale are carried at the lower of aggregate cost or fair value and included in other assets in the Consolidated Statements of Financial Condition. Acquired and Covered Loans – Covered loans consists of loans acquired by the Company in Federal Deposit Insurance Corporation (" FDIC ")-assisted transactions, which are covered by loss share agreements with the FDIC (the " FDIC Agreements "), under which the FDIC reimburses the Company for the majority of the losses and eligible expenses related to these assets during the coverage period. Acquired loans consist of all other loans that were acquired in business combinations that are not covered by the FDIC Agreements. Covered loans and acquired loans are included within loans held-for-investment. Acquired and covered loans are separated into (i) non-purchased credit impaired (" Non-PCI ") and (ii) purchased credit impaired (" PCI ") loans. Non-PCI loans include loans that did not have evidence of credit deterioration since origination at the acquisition date. PCI loans include loans that had evidence of credit deterioration since origination and for which it was probable at acquisition that the Company would not collect all contractually required principal and interest payments. Evidence of credit deterioration was evaluated using various indicators, such as past due and non-accrual status. Leases and revolving loans do not qualify to be accounted for as PCI loans and are accounted for as Non-PCI loans. The acquisition adjustment related to Non-PCI loans is amortized into interest income over the contractual life of the related loans. If an acquired Non-PCI loan is renewed subsequent to the acquisition date, any remaining acquisition adjustment is accreted into interest income and the loan is considered a new loan that is no longer classified as an acquired loan. PCI loans are accounted for based on estimates of expected future cash flows. To estimate the fair value, the Company generally aggregates purchased consumer loans and certain smaller balance commercial loans into pools of loans with common risk characteristics, such as delinquency status, credit score, and internal risk ratings. The fair values of larger balance commercial loans are estimated on an individual basis. Expected future cash flows in excess of the fair value of loans at the purchase date ("accretable yield") are recorded as interest income over the life of the loans if the timing and amount of the expected future cash flows can be reasonably estimated. The non-accretable yield represents the difference between contractually required payments and the expected future cash flows determined at acquisition. Subsequent increases in expected future cash flows are offset against the allowance for credit losses to the extent an allowance has been established or otherwise recognized as interest income prospectively. The present value of any decreases in expected future cash flows is recognized by recording a charge-off through the allowance for loan losses or providing an allowance for loan losses. 90-Days Past Due Loans –The Company 's accrual of interest on loans is discontinued at the time the loan is 90 days past due unless the credit is sufficiently collateralized and in the process of renewal or collection. Non-accrual Loans – Generally, corporate loans are placed on non-accrual status (i) when either principal or interest payments become 90 days or more past due unless the credit is sufficiently collateralized and in the process of renewal or collection, or (ii) when an individual analysis of a borrower's creditworthiness warrants a downgrade to non-accrual regardless of past due status. When a loan is placed on non-accrual status, unpaid interest credited to income in the current year is reversed, and unpaid interest accrued in prior years is charged against the allowance for loan losses. After the loan is placed on non-accrual status, all debt service payments are applied to the principal on the loan. Future interest income may only be recorded on a cash basis after recovery of principal is reasonably assured. Non-accrual loans are returned to accrual status when the financial position of the borrower and other relevant factors indicate that the Company will collect all principal and interest. Commercial loans and loans secured by real estate are charged-off when deemed uncollectible. A loss is recorded if the net realizable value of the underlying collateral is less than the outstanding principal and interest. Consumer loans that are not secured by real estate are subject to mandatory charge-off at a specified delinquency date and are usually not classified as non-accrual prior to being charged-off. Closed-end consumer loans, which include installment, automobile, and single payment loans, are usually charged-off no later than the end of the month in which the loan becomes 120 days past due. PCI loans are generally considered accruing loans unless reasonable estimates of the timing and amount of expected future cash flows cannot be determined. Loans without reasonable future cash flow estimates are classified as non-accrual loans, and interest income is not recognized on those loans until the timing and amount of the expected future cash flows can be reasonably determined. Troubled Debt Restructurings ( " TDR s" ) – A restructuring is considered a TDR when (i) the borrower is experiencing financial difficulties, and (ii) the creditor grants a concession, such as forgiveness of principal, reduction of the interest rate, changes in payments, or extension of the maturity date. Loans are not classified as TDR s when the modification is short-term or results in an insignificant delay in payments. The Company 's TDR s are determined on a case-by-case basis. The Company does not accrue interest on a TDR unless it believes collection of all principal and interest under the modified terms is reasonably assured. For a TDR to begin accruing interest, the borrower must demonstrate some level of past performance and the future capacity to perform under the modified terms. Generally, six months of consecutive payment performance under the restructured terms is required before a TDR is returned to accrual status. However, the period could vary depending on the individual facts and circumstances of the loan. An evaluation of the borrower's current creditworthiness is used to assess the borrower's capacity to repay the loan under the modified terms. This evaluation includes an estimate of expected future cash flows, evidence of strong financial position, and estimates of the value of collateral, if applicable. For TDR s to be removed from TDR status in the calendar year after the restructuring, the loans must (i) have an interest rate and terms that reflect market conditions at the time of restructuring, and (ii) be in compliance with the modified terms. If the loan was restructured at below market rates and terms, it continues to be separately reported as restructured until it is paid in full or charged-off. Impaired Loans – Impaired loans consist of corporate non-accrual loans and TDR s. A loan is considered impaired when it is probable that the Company will not collect all contractual principal and interest. With the exception of accruing TDR s, impaired loans are classified as non-accrual and are exclusive of smaller homogeneous loans, such as home equity, 1-4 family mortgages, and installment loans. Impaired loans with balances under a specified threshold are not individually evaluated for impairment. For all other impaired loans, impairment is measured by comparing the estimated value of the loan to the recorded book value. The value of collateral-dependent loans is based on the fair value of the underlying collateral, less costs to sell. The value of other loans is measured using the present value of expected future cash flows discounted at the loan's initial effective interest rate. Allowance for Credit Losses – The allowance for credit losses is comprised of the allowance for loan losses and the reserve for unfunded commitments, and is maintained by management at a level believed adequate to absorb estimated losses inherent in the existing loan portfolio. Determination of the allowance for credit losses is subjective since it requires significant estimates and management judgment, including the amounts and timing of expected future cash flows on impaired loans, estimated losses on pools of homogeneous loans, consideration of current economic trends, and other factors. Loans deemed to be uncollectible are charged-off against the allowance for loan losses, while recoveries of amounts previously charged-off are credited to the allowance for loan losses. Additions to the allowance for loan losses are charged to expense through the provision for loan losses. The amount of provision depends on a number of factors, including net charge-off levels, loan growth, changes in the composition of the loan portfolio, and the Company 's assessment of the allowance for loan losses based on the methodology discussed below. Allowance for Loan Losses – The allowance for loan losses consists of (i) specific reserves for individual loans where the recorded investment exceeds the value, (ii) an allowance based on a loss migration analysis that uses historical credit loss experience for each loan category, and (iii) an allowance based on other internal and external qualitative factors. The specific reserves component of the allowance for loan losses is based on a periodic analysis of impaired loans exceeding a fixed dollar amount. If the value of an impaired loan is less than the recorded book value, the Company either establishes a valuation allowance (i.e., a specific reserve) equal to the excess of the book value over the value of the loan as a component of the allowance for loan losses or charges off the amount if it is a confirmed loss. The general reserve component is based on a loss migration analysis, which examines actual loss experience by loan category for a rolling 8-quarter period and the related internal risk rating for corporate loans. The loss migration analysis is updated quarterly primarily using actual loss experience. This component is then adjusted based on management's consideration of many internal and external qualitative factors, including: • Changes in the composition of the loan portfolio, trends in the volume of loans, and trends in delinquent and non-accrual loans that could indicate that historical trends do not reflect current conditions. • Changes in credit policies and procedures, such as underwriting standards and collection, charge-off, and recovery practices. • Changes in the experience, ability, and depth of credit management and other relevant staff. • Changes in the quality of the Company 's loan review system and Board of Directors oversight. • The effect of any concentration of credit and changes in the level of concentrations, such as loan type or risk rating. • Changes in the value of the underlying collateral for collateral-dependent loans. • Changes in the national and local economy that affect the collectability of various segments of the portfolio. • The effect of other external factors, such as competition and legal and regulatory requirements, on the Company 's loan portfolio. The allowance for loan losses also consists of an allowance on acquired and covered Non-PCI and PCI loans. No allowance for loan losses is recorded on acquired loans at the acquisition date. Subsequent to the acquisition date, an allowance for credit losses is established as necessary to reflect credit deterioration. The acquired Non-PCI allowance is based on management's evaluation of the acquired Non-PCI loan portfolio giving consideration to the current portfolio balance including the remaining acquisition adjustments, maturity dates, and overall credit quality. The allowance for covered Non-PCI loans is calculated in the same manner as the general reserve component based on a loss migration analysis as discussed above. The acquired and covered PCI allowance reflects the difference between the carrying value and the discounted expected future cash flows of the acquired and covered PCI loans. On a periodic basis, the adequacy of this allowance is determined through a re-estimation of expected future cash flows on all of the outstanding acquired and covered PCI loans using either a probability of default/loss given default (" PD/LGD ") methodology or a specific review methodology. The PD/LGD model is a loss model that estimates expected future cash flows using a probability of default curve and loss given default estimates. Acquired Non-PCI loans that have renewed subsequent to the respective acquisition dates are no longer classified as acquired loans. Instead, they are included in the general loan population and allocated an allowance based on a loss migration analysis. Reserve for Unfunded Commitments – The Company also maintains a reserve for unfunded commitments, including letters of credit, for the risk of loss inherent in these arrangements. The reserve for unfunded commitments is estimated using the loss migration analysis from the allowance for loan losses, adjusted for probabilities of future funding requirements. The reserve for unfunded commitments is included in other liabilities in the Consolidated Statements of Financial Condition. The establishment of the allowance for credit losses involves a high degree of judgment given the difficulty of assessing the factors impacting loan repayment and estimating the timing and amount of losses. While management utilizes its best judgment and information available, the adequacy of the allowance for credit losses depends on a variety of factors beyond the Company 's control, including the performance of its loan portfolio, the economy, changes in interest rates and property values, and the interpretation of loan risk classifications by regulatory authorities. Derivative Financial Instruments – To provide derivative products to customers and in the ordinary course of business, the Company enters into derivative transactions as part of its overall interest rate risk management strategy to minimize significant unplanned fluctuations in earnings and expected future cash flows caused by interest rate volatility. All derivative instruments are recorded at fair value as either other assets or other liabilities in the Consolidated Statements of Financial Condition. Subsequent changes in a derivative's fair value are recognized in earnings unless specific hedge accounting criteria are met. On the date the Company enters into a derivative contract, the derivative is designated as a fair value hedge, a cash flow hedge, or a non-hedge derivative instrument. Fair value hedges are designed to mitigate exposure to changes in the fair value of an asset or liability attributable to a particular risk, such as interest rate risk. Cash flow hedges are designed to mitigate exposure to variability in expected future cash flows to be received or paid related to an asset, liability, or other type of forecasted transaction. The Company formally documents all relationships between hedging instruments and hedged items, including its risk management objective and strategy at inception. At the hedge's inception and quarterly thereafter, a formal assessment is performed to determine the effectiveness of the derivative in offsetting changes in the fair values or expected future cash flows of the hedged items in the current period and prospectively. If a derivative instrument designated as a hedge is terminated or ceases to be highly effective, hedge accounting is discontinued prospectively, and the gain or loss is amortized into earnings. For fair value hedges, the gain or loss is amortized over the remaining life of the hedged asset or liability. For cash flow hedges, the gain or loss is amortized over the same period that the forecasted hedged transactions impact earnings. If the hedged item is disposed of, any fair value adjustments are included in the gain or loss from the disposition of the hedged item. If the forecasted transaction is no longer probable, the gain or loss is included in earnings immediately. For fair value hedges, changes in the fair value of the derivative instruments, as well as changes in the fair value of the hedged item, are recognized in earnings. For cash flow hedges, the effective portion of the change in fair value of the derivative instrument is reported as a component of accumulated other comprehensive loss and is reclassified to earnings when the hedged transaction is reflected in earnings. Ineffectiveness is calculated based on the change in fair value of the hedged item compared with the change in fair value of the hedging instrument. For all types of hedges, any ineffectiveness in the hedging relationship is recognized in earnings during the period the ineffectiveness occurs.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	9 Months Ended
	Sep. 30, 2016
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements	RECENT ACCOUNTING PRONOUNCEMENTS Adopted Accounting Pronouncements Amendments to Consolidation Analysis: In February 2015, the Financial Accounting Standards Board (" FASB ") issued guidance that updates current accounting for the consolidation of certain legal entities. This guidance modifies the evaluation of whether limited partnerships and similar legal entities are variable interest entities ("VIEs") or voting interest entities, eliminates the presumption that a general partner should consolidate a limited partnership, affects the consolidation analysis of reporting entities that are involved with VIEs, and provides certain exceptions from consolidation guidance for certain reporting entities. This guidance is effective for annual and interim periods beginning after December 15, 2015. The adoption of this guidance on January 1, 2016 did not materially impact the Company 's financial condition, results of operations, or liquidity. Simplifying the Presentation of Debt Issuance Costs: In April of 2015, the FASB issued guidance to clarify the presentation of debt issuance costs within the balance sheet. Additionally, the guidance requires debt issuance costs related to a recognized debt liability to be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The recognition and measurement guidance for debt issuance costs are not affected by this amendment. The guidance is effective for annual and interim periods beginning after December 15, 2015. The adoption of this guidance on January 1, 2016 did not materially impact the Company 's financial condition, results of operations, or liquidity. Accounting Pronouncements Pending Adoption Revenue from Contracts with Customers: In May of 2014, the FASB issued guidance that requires an entity to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In March of 2016, the FASB issued an amendment to this guidance to clarify the implementation of guidance on principal versus agent consideration. Additional amendments to clarify the implementation guidance on the identification of performance obligations and licensing were issued in April of 2016 and narrow-scope improvements and practical expedients were issued in May of 2016. The guidance was initially effective for annual and interim reporting periods beginning on or after December 15, 2016. In August of 2015, the FASB issued guidance that defers the effective date by one year. The deferral causes the guidance to be effective for annual and interim reporting periods beginning on or after December 15, 2017, and must be applied either retrospectively or using the modified retrospective approach. Early adoption is permitted, but not before the original effective date. Management is evaluating the new guidance and the impact to the Company 's financial condition, results of operations, and liquidity. Disclosure of Uncertainties about an Entity's Ability to Continue as a Going Concern: In August of 2014, the FASB issued guidance that requires management to evaluate whether there are conditions or events, considered in the aggregate, that raise substantial doubt about the entity's ability to continue as a going concern within one year after the date that the financial statements are issued. The guidance is effective for annual and interim periods beginning after December 15, 2016. Early adoption is permitted. Management does not expect the adoption of this guidance will materially impact the Company 's financial condition, results of operations, or liquidity. Amendments to Guidance on Classifying and Measuring Financial Instruments: In January of 2016, the FASB issued guidance that will require entities to measure equity investments that do not result in consolidation and are not accounted for under the equity method at fair value. Any changes in fair value will be recognized in net income unless the investments qualify for a new practicability exception. This guidance also requires entities to recognize changes in instrument-specific credit risk related to financial liabilities measured under the fair value option in other comprehensive income. No changes were made to the guidance for classifying and measuring investments in debt securities and loans. This guidance is effective for annual and interim periods beginning after December 15, 2017. Early adoption is permitted. Management does not expect the adoption of this guidance will materially impact the Company 's financial condition, results of operations, or liquidity. Leases: In February of 2016, the FASB issued guidance to increase transparency and comparability across entities for leasing arrangements. This guidance requires lessees to recognize assets and liabilities for most leases. For lessors, this guidance modifies the lease classification criteria and the accounting for sales-type and direct financing leases. In addition, this guidance clarifies criteria for the determination of whether a contract is or contains a lease. This guidance is effective for annual and interim periods beginning after December 15, 2018. Early adoption is permitted. During the third quarter of 2016, the Company entered into a sale-leaseback transaction that resulted in a deferred gain of $82.5 million . Upon adoption of this guidance, the remaining deferred gain will be recognized immediately as a cumulative-effect adjustment to equity. For additional discussion of the sale-leaseback transaction, see note 8 " Premises, Furniture, and Equipment ." Management is evaluating the new guidance and the additional impact to the Company 's financial condition, results of operations, or liquidity. Contingent Put and Call Options in Debt Instruments: In March of 2016, the FASB issued final guidance clarifying the requirements for assessing whether contingent call (put) options that can accelerate the payment of principal on debt instruments are clearly and closely related to their debt hosts. Entities are required to apply the guidance to existing debt instruments (or hybrid financial instruments that are determined to have a debt host) using a modified retrospective transition method as of the period of adoption. This guidance is effective for annual and interim periods beginning after December 15, 2016. Early adoption is permitted. Management does not expect the adoption of this guidance will materially impact the Company 's financial condition, results of operations, or liquidity. Equity Method Accounting: In March of 2016, the FASB issued final guidance to simplify the equity method of accounting. The guidance eliminates the requirement to retrospectively apply equity method accounting in previous periods when an investor initially obtains significant influence over an investee. This guidance is effective for annual and interim periods beginning after December 15, 2016. Early adoption is permitted. Management does not expect the adoption of this guidance will materially impact the Company 's financial condition, results of operations, or liquidity. Accounting for Employee Share-based Payments: In March of 2016, the FASB issued guidance to simplify the accounting for employee share-based payment transactions. The guidance requires entities to recognize the income tax effects of awards in the income statement when the awards vest or are settled. In addition, the guidance allows entities to repurchase more of an employee's shares than it can under current guidance for tax withholding purposes without triggering liability accounting and to make a policy election to account for forfeitures as they occur. This guidance is effective for annual and interim reporting periods beginning on or after December 15, 2016. Early adoption is permitted. Management is evaluating the new guidance, but does not expect the adoption of this guidance will materially impact the Company's financial condition, results of operations, or liquidity. Measurement of Credit Losses on Financial Instruments: In June of 2016, the FASB issued guidance that will require entities to present financial assets measured at amortized cost at the net amount expected to be collected, considering an entity's current estimate of all expected credit losses. In addition, credit losses relating to available-for-sale debt securities will be required to be recorded through an allowance for credit losses, with changes in credit loss estimates recognized through current earnings. This guidance is effective for annual and interim periods beginning after December 15, 2019. Early adoption is permitted, but not for periods beginning before December 15, 2018. Management is evaluating the new guidance and the impact to the Company 's financial condition, results of operations, and liquidity. Classification of Certain Cash Receipts and Cash Payments: In August of 2016, the FASB issued guidance clarifying certain cash flow presentation and classification issues to reduce diversity in practice. This guidance is effective for annual and interim reporting periods beginning on or after December 15, 2017. Early adoption is permitted. Management does not expect the adoption of this guidance will materially impact the Company 's Consolidated Statement of Cash Flows.

Acquisitions

Acquisitions	9 Months Ended
	Sep. 30, 2016
Business Combinations [Abstract]
Acquisitions	ACQUISITIONS Pending Acquisitions Standard Bancshares, Inc. On June 28, 2016, the Company entered into a definitive agreement to acquire Standard Bancshares, Inc. ("Standard"), the holding company for Standard Bank and Trust Company. With the acquisition, the Company would acquire 35 banking offices located primarily in the southwest Chicago suburbs and adjacent markets in northwest Indiana. As of June 30, 2016, Standard had total assets of approximately $2.5 billion with $2.2 billion in deposits and $1.8 billion in loans. The merger agreement provides for a fixed exchange ratio of 0.4350 shares of First Midwest common stock for each share of Standard common stock. As of the date of announcement, the overall transaction was valued at approximately $365 million , including Standard's common stock, stock options, phantom stock, and stock settled rights. The acquisition is expected to close in late 2016 or early 2017, subject to customary regulatory approvals and closing conditions, as well as the approval of the Company's and Standard's shareholders. Completed Acquisitions NI Bancshares Corporation On March 8, 2016, the Company completed the acquisition of NI Bancshares Corporation (" NI Bancshares "), the holding company for The National Bank & Trust Company of Sycamore. As part of the acquisition, the Company acquired all assets and assumed all liabilities of NI Bancshares , which included ten banking offices in northern Illinois and over $700.0 million in trust assets under management. The merger consideration was a combination of Company common stock and cash, at a purchase price of $70.1 million . Goodwill of $20.8 million associated with the acquisition was recorded by the Company. The Company is finalizing the fair values of the assets and liabilities acquired. As a result, the fair value adjustments associated with these accounts and goodwill are preliminary and may change. Peoples Bancorp, Inc. On December 3, 2015, the Company completed the acquisition of Peoples Bancorp, Inc. (" Peoples "), and its wholly-owned banking subsidiary, The Peoples' Bank of Arlington Heights. With the acquisition, the Company acquired all assets and assumed all liabilities of Peoples , which included two banking offices in Arlington Heights, Illinois, at a purchase price of $16.8 million paid in cash. The Company recorded goodwill of $7.5 million associated with the acquisition. The Company is finalizing the fair values of the assets and liabilities acquired. As a result, the fair value adjustments associated with these accounts and goodwill are preliminary and may change. The following table presents the assets acquired and liabilities assumed, net of the fair value adjustments, in the NI Bancshares and Peoples transactions as of the acquisition date. The assets acquired and liabilities assumed, both intangible and tangible, were recorded at their estimated fair values as of the acquisition date and have been accounted for under the acquisition method of accounting. Acquisition Activity (Amounts in thousands, except share and per share data) NI Bancshares Peoples March 8, 2016 December 3, 2015 Assets Cash and due from banks and interest-bearing deposits in other banks $ 72,533 $ 781 Securities available-for-sale 125,843 41,492 Securities held-to-maturity 1,864 — FHLB and FRB stock 1,549 558 Loans 397,018 53,917 OREO 2,863 515 Investment in BOLI 8,384 — Goodwill 20,762 7,544 Other intangible assets 10,925 580 Premises, furniture, and equipment 20,019 2,215 Accrued interest receivable and other assets 16,004 2,911 Total assets $ 677,764 $ 110,513 Liabilities Noninterest-bearing deposits $ 130,909 $ 15,869 Interest-bearing deposits 464,012 75,944 Total deposits 594,921 91,813 Borrowed funds 2,416 1,200 Intangible liabilities 230 — Accrued interest payable and other liabilities 10,115 672 Total liabilities 607,682 93,685 Consideration Paid Common stock (2016 - 3,042,494 shares issued at $18.059 per share), net of $48,000 in issuance costs 54,896 — Cash paid 15,186 16,828 Total consideration paid 70,082 16,828 $ 677,764 $ 110,513 Expenses related to the acquisition and integration of the transactions above and pending transactions totaled $1.2 million and $6.8 million during the quarter and nine months ended September 30, 2016, respectively, and are reported as a separate component within noninterest expense in the Condensed Consolidated Statements of Income. There were no acquisition and integration related expenses for the quarter and nine months ended September 30, 2015. The completed acquisitions were not considered material to the Company's financial statements; therefore, pro forma financial data and related disclosures are not included.

Securities

Securities	9 Months Ended
	Sep. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Securities	SECURITIES Securities are classified as held-to-maturity, trading, or available-for-sale at the time of purchase. Securities classified as held-to-maturity are securities for which management has the intent and ability to hold to maturity and are stated at cost. The Company's trading securities consist of diversified investment securities reported at fair value that are held in a grantor trust under deferred compensation arrangements in which plan participants may direct amounts earned to be invested in securities other than Company stock. All other securities are classified as available-for-sale and are carried at fair value with unrealized gains and losses, net of related deferred income taxes, recorded in stockholders' equity as a separate component of accumulated other comprehensive loss. A summary of the Company's securities portfolio by category and maturity is presented in the following tables. Securities Portfolio (Dollar amounts in thousands) As of September 30, 2016 As of December 31, 2015 Amortized Cost Gross Unrealized Fair Value Amortized Cost Gross Unrealized Fair Value Gains Losses Gains Losses Securities Available-for-Sale U.S. treasury securities $ 43,593 $ 212 $ (8 ) $ 43,797 $ 17,000 $ 15 $ (35 ) $ 16,980 U.S. agency securities 190,821 2,159 (49 ) 192,931 86,461 351 (169 ) 86,643 Collateralized mortgage obligations ("CMOs") 1,074,736 8,759 (2,236 ) 1,081,259 695,198 1,072 (9,085 ) 687,185 Other mortgage-backed securities ("MBSs") 319,964 4,641 (121 ) 324,484 152,481 1,920 (871 ) 153,530 Municipal securities 280,884 5,959 (130 ) 286,713 321,437 6,443 (310 ) 327,570 Trust-preferred collateralized debt obligations ("CDOs") 47,893 73 (16,067 ) 31,899 48,287 34 (16,792 ) 31,529 Equity securities 3,075 110 (238 ) 2,947 3,282 86 (169 ) 3,199 Total securities available-for-sale $ 1,960,966 $ 21,913 $ (18,849 ) $ 1,964,030 $ 1,324,146 $ 9,921 $ (27,431 ) $ 1,306,636 Securities Held-to-Maturity Municipal securities $ 20,337 $ — $ (2,227 ) $ 18,110 $ 23,152 $ — $ (3,098 ) $ 20,054 Trading Securities $ 18,351 $ 16,894 Remaining Contractual Maturity of Securities (Dollar amounts in thousands) As of September 30, 2016 Available-for-Sale Held-to-Maturity Amortized Cost Fair Value Amortized Cost Fair Value One year or less $ 75,444 $ 74,392 $ 3,218 $ 2,866 After one year to five years 433,027 426,991 7,560 6,732 After five years to ten years 6,827 6,732 2,340 2,084 After ten years 47,893 47,225 7,219 6,428 Securities that do not have a single contractual maturity date 1,397,775 1,408,690 — — Total $ 1,960,966 $ 1,964,030 $ 20,337 $ 18,110 The carrying value of securities available-for-sale that were pledged to secure deposits or for other purposes as permitted or required by law totaled $1.3 billion at September 30, 2016 and $856.9 million at December 31, 2015 . No securities held-to-maturity were pledged as of September 30, 2016 or December 31, 2015 . Purchases and sales of securities are recognized on a trade date basis. Realized securities gains or losses are reported in net securities gains in the Condensed Consolidated Statements of Income. The cost of securities sold is based on the specific identification method. During the quarters and nine months ended September 30, 2016 and 2015 there were no material gross trading gains or losses. The following table presents net realized gains on securities available-for-sale for the quarters and nine months ended September 30, 2016 and 2015 . Securities Available-for-Sale Gains (Dollar amounts in thousands) Quarters Ended Nine Months Ended 2016 2015 2016 2015 Gains on sales of securities: Gross realized gains $ 187 $ 524 $ 1,266 $ 1,689 Gross realized losses — — (169 ) (138 ) Net realized gains on sales of securities 187 524 1,097 1,551 Non-cash impairment charges: Other-than-temporary securities impairment ("OTTI") — — — — Net realized gains $ 187 $ 524 $ 1,097 $ 1,551 Accounting guidance requires that the credit portion of an OTTI charge be recognized through income. If a decline in fair value below carrying value is not attributable to credit deterioration and the Company does not intend to sell the security or believe it would not be more likely than not required to sell the security prior to recovery, the Company records the non-credit related portion of the decline in fair value in other comprehensive income. The following table presents a rollforward of life-to-date OTTI recognized in earnings related to all securities available-for-sale held by the Company for the quarters and nine months ended September 30, 2016 and 2015 . The majority of the beginning and ending balance of OTTI relates to CDOs currently held by the Company . Changes in OTTI Recognized in Earnings (Dollar amounts in thousands) Quarters Ended Nine Months Ended 2016 2015 2016 2015 Beginning balance $ 23,709 $ 23,709 $ 23,709 $ 23,880 OTTI included in earnings (1) : Reduction for sales of securities (2) — — — (171 ) Ending balance $ 23,709 $ 23,709 $ 23,709 $ 23,709 (1) Included in net securities gains in the Condensed Consolidated Statements of Income. (2) This reduction was driven by the sale of one CMO with a carrying value of $1.3 million during the nine months ended September 30, 2015. The following table presents the aggregate amount of unrealized losses and the aggregate related fair values of securities with unrealized losses as of September 30, 2016 and December 31, 2015 . Securities in an Unrealized Loss Position (Dollar amounts in thousands) Less Than 12 Months 12 Months or Longer Total Number of Securities Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses As of September 30, 2016 Securities Available-for-Sale U.S. treasury securities 5 $ 10,049 $ 7 $ 1,999 $ 1 $ 12,048 $ 8 U.S. agency securities 12 23,394 49 — — 23,394 49 CMOs 64 180,572 717 119,934 1,519 300,506 2,236 MBSs 15 45,686 89 6,573 32 52,259 121 Municipal securities 49 18,615 112 2,307 18 20,922 130 CDOs 9 1,218 9 29,398 16,058 30,616 16,067 Equity securities 2 379 226 2,379 12 2,758 238 Total 156 $ 279,913 $ 1,209 $ 162,590 $ 17,640 $ 442,503 $ 18,849 Securities Held-to-Maturity Municipal securities 16 $ 18,110 $ 2,227 $ — $ — $ 18,110 $ 2,227 As of December 31, 2015 Securities Available-for-Sale U.S. treasury securities 4 $ 7,946 $ 35 $ — $ — $ 7,946 $ 35 U.S. agency securities 10 30,620 169 — — 30,620 169 CMOs 133 309,787 3,110 257,362 5,975 567,149 9,085 MBSs 27 63,028 427 31,980 444 95,008 871 Municipal securities 68 8,135 65 24,227 245 32,362 310 CDOs 8 8,034 971 21,642 15,821 29,676 16,792 Equity securities 2 485 120 2,305 49 2,790 169 Total 252 $ 428,035 $ 4,897 $ 337,516 $ 22,534 $ 765,551 $ 27,431 Securities Held-to-Maturity Municipal securities 19 $ 20,054 $ 3,098 $ — $ — $ 20,054 $ 3,098 Substantially all of the Company 's CMO s and other MBSs are either backed by U.S. government-owned agencies or issued by U.S. government-sponsored enterprises. Municipal securities are issued by municipal authorities, and the majority are supported by third party insurance or some other form of credit enhancement. Management does not believe any of these securities with unrealized losses as of September 30, 2016 represent OTTI related to credit deterioration. These unrealized losses are attributed to changes in interest rates and temporary market movements. The Company does not intend to sell these securities and it is not more likely than not that the Company will be required to sell them before recovery of their amortized cost basis, which may be at maturity. The unrealized losses on CDOs as of September 30, 2016 reflect changes in market activity for these securities. Management does not believe these unrealized losses represent OTTI related to credit deterioration. In addition, the Company does not intend to sell the CDOs with unrealized losses and the Company does not believe it is more likely than not that it will be required to sell them before recovery of their amortized cost basis, which may be at maturity. Significant judgment is required to calculate the fair value of the CDOs . For a detailed discussion of the CDO valuation methodology, see Note 14 , " Fair Value ."

Loans

Loans	9 Months Ended
	Sep. 30, 2016
Loans and Leases Receivable Disclosure [Abstract]
Loans	LOANS Loans Held-for-Investment The following table presents the Company 's loans held-for-investment by class. Loan Portfolio (Dollar amounts in thousands) As of September 30, December 31, Commercial and industrial $ 2,849,399 $ 2,524,726 Agricultural 409,571 387,440 Commercial real estate: Office, retail, and industrial 1,537,038 1,395,454 Multi-family 625,305 528,324 Construction 401,857 216,882 Other commercial real estate 970,855 931,190 Total commercial real estate 3,535,055 3,071,850 Total corporate loans 6,794,025 5,984,016 Home equity 733,260 653,468 1-4 family mortgages 388,145 355,854 Installment 232,030 137,602 Total consumer loans 1,353,435 1,146,924 Covered loans 24,322 30,775 Total loans $ 8,171,782 $ 7,161,715 Deferred loan fees included in total loans $ 4,034 $ 5,191 Overdrawn demand deposits included in total loans 3,428 2,810 The Company primarily lends to community-based and mid-sized businesses, commercial real estate customers, and consumers in its markets. Within these areas, the Company diversifies its loan portfolio by loan type, industry, and borrower. It is the Company 's policy to review each prospective credit to determine the appropriateness and the adequacy of security or collateral prior to making a loan. In the event of borrower default, the Company seeks recovery in compliance with state lending laws, the Company 's lending standards, and credit monitoring and remediation procedures. A discussion of risk characteristics relevant to each portfolio segment is presented in Note 5 , "Loans" to the Consolidated Financial Statements in the Company 's 2015 10-K. Loan Sales The following table presents loan sales for the quarters and nine months ended September 30, 2016 and 2015 . Loan Sales (Dollar amounts in thousands) Quarters Ended Nine Months Ended 2016 2015 2016 2015 Corporate loan sales Proceeds from sales $ 12,223 $ 10,226 $ 36,082 $ 19,649 Less book value of loans sold 11,828 9,771 34,718 18,780 Net gains on corporate loan sales (1) 395 455 1,364 869 1-4 family mortgage loan sales Proceeds from sales 110,167 43,340 202,932 132,367 Less book value of loans sold 107,255 42,189 198,024 128,634 Net gains on 1-4 family mortgage loan sales (2) 2,912 1,151 4,908 3,733 Total net gains on loan sales $ 3,307 $ 1,606 $ 6,272 $ 4,602 (1) Net gains on corporate loan sales are included in other service charges, commissions, and fees in the Condensed Consolidated Statements of Income. (2) Net gains on 1-4 family mortgage loan sales are included in mortgage banking income in the Condensed Consolidated Statements of Income. The Company retained servicing responsibilities for a portion of the 1-4 family mortgage loans sold and collects servicing fees equal to a percentage of the outstanding principal balance. The Company also retained limited recourse for credit losses on the sold 1-4 family mortgage loans. A description of the recourse obligation is presented in Note 13 , " Commitments, Guarantees, and Contingent Liabilities ."

Acquired and Covered Loans

Acquired and Covered Loans	9 Months Ended
	Sep. 30, 2016
Acquired Loans [Abstract]
Acquired and Covered Loans	ACQUIRED AND COVERED LOANS The significant accounting policies related to acquired and covered loans, which are classified as PCI and Non-PCI , are presented in Note 1 , " Summary of Significant Accounting Policies ." The following table presents acquired and covered PCI and Non-PCI loans as of September 30, 2016 and December 31, 2015 . Acquired and Covered Loans (Dollar amounts in thousands) As of September 30, 2016 As of December 31, 2015 PCI Non-PCI Total PCI Non-PCI Total Acquired loans $ 57,777 $ 686,427 $ 744,204 $ 50,286 $ 534,506 $ 584,792 Covered loans 8,228 16,094 24,322 9,919 20,856 30,775 Total acquired and covered loans $ 66,005 $ 702,521 $ 768,526 $ 60,205 $ 555,362 $ 615,567 Acquired Non-PCI loans that are renewed are no longer classified as acquired loans. These loans totaled $101.5 million and $61.6 million as of September 30, 2016 and December 31, 2015 , respectively. In connection with the FDIC Agreements , the Company recorded an indemnification asset. To maintain eligibility for the loss share reimbursement, the Company is required to follow certain servicing procedures as specified in the FDIC Agreements . The Company was in compliance with those requirements as of September 30, 2016 and December 31, 2015 . Rollforwards of the carrying value of the FDIC indemnification asset for the quarters and nine months ended September 30, 2016 and 2015 are presented in the following table. Changes in the FDIC Indemnification Asset (Dollar amounts in thousands) Quarters Ended Nine Months Ended 2016 2015 2016 2015 Beginning balance $ 5,171 $ 7,335 $ 3,903 $ 8,452 Amortization (302 ) (321 ) (884 ) (1,174 ) Change in expected reimbursements from the FDIC for changes in expected credit losses (228 ) 487 (487 ) 2,207 Net payments to (from) the FDIC 191 (1,395 ) 2,300 (3,379 ) Ending balance $ 4,832 $ 6,106 $ 4,832 $ 6,106 Changes in the accretable yield for acquired and covered PCI loans were as follows. Changes in Accretable Yield (Dollar amounts in thousands) Quarters Ended Nine Months Ended 2016 2015 2016 2015 Beginning balances $ 25,082 $ 20,658 $ 24,912 $ 28,244 Additions — — 3,981 — Accretion (2,763 ) (2,366 ) (6,612 ) (9,364 ) Other (1) (1,012 ) 336 (974 ) (252 ) Ending balance $ 21,307 $ 18,628 $ 21,307 $ 18,628 (1) Decreases result from the resolution of certain loans occurring earlier than anticipated while increases represent a rise in the expected future cash flows to be collected over the remaining estimated life of the underlying portfolio.

Past Due Loans, Allowance For C

Past Due Loans, Allowance For Credit Losses, Impaired Loans, and TDRS	9 Months Ended
	Sep. 30, 2016
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Past Due Loans, Allowance For Credit Losses, Impaired Loans, and TDRS	PAST DUE LOANS, ALLOWANCE FOR CREDIT LOSSES, IMPAIRED LOANS, AND TDRS Past Due and Non-accrual Loans The following table presents an aging analysis of the Company 's past due loans as of September 30, 2016 and December 31, 2015 . The aging is determined without regard to accrual status. The table also presents non-performing loans, consisting of non-accrual loans (the majority of which are past due) and loans 90 days or more past due and still accruing interest, as of each balance sheet date. Aging Analysis of Past Due Loans and Non-performing Loans by Class (Dollar amounts in thousands) Aging Analysis (Accruing and Non-accrual) Non-performing Loans Current 30-89 Days Past Due 90 Days or More Past Due Total Past Due Total Loans Non- accrual 90 Days or More Past Due, Still Accruing Interest As of September 30, 2016 Commercial and industrial $ 2,833,642 $ 9,099 $ 6,658 $ 15,757 $ 2,849,399 $ 13,823 $ 2,154 Agricultural 406,947 2,460 164 2,624 409,571 184 — Commercial real estate: Office, retail, and industrial 1,516,820 5,816 14,402 20,218 1,537,038 17,670 82 Multi-family 623,386 1,321 598 1,919 625,305 316 454 Construction 400,809 767 281 1,048 401,857 287 — Other commercial real estate 964,135 3,254 3,466 6,720 970,855 3,361 932 Total commercial real estate 3,505,150 11,158 18,747 29,905 3,535,055 21,634 1,468 Total corporate loans 6,745,739 22,717 25,569 48,286 6,794,025 35,641 3,622 Home equity 727,433 3,591 2,236 5,827 733,260 4,916 165 1-4 family mortgages 385,024 1,869 1,252 3,121 388,145 3,240 235 Installment 229,881 1,853 296 2,149 232,030 — 296 Total consumer loans 1,342,338 7,313 3,784 11,097 1,353,435 8,156 696 Covered loans 23,905 319 98 417 24,322 492 — Total loans $ 8,111,982 $ 30,349 $ 29,451 $ 59,800 $ 8,171,782 $ 44,289 $ 4,318 As of December 31, 2015 Commercial and industrial $ 2,516,197 $ 4,956 $ 3,573 $ 8,529 $ 2,524,726 $ 5,587 $ 857 Agricultural 387,109 245 86 331 387,440 355 — Commercial real estate: Office, retail, and industrial 1,386,383 2,647 6,424 9,071 1,395,454 6,875 4 Multi-family 526,625 541 1,158 1,699 528,324 796 548 Construction 216,377 — 505 505 216,882 905 — Other commercial real estate 922,531 3,575 5,084 8,659 931,190 5,611 661 Total commercial real estate 3,051,916 6,763 13,171 19,934 3,071,850 14,187 1,213 Total corporate loans 5,955,222 11,964 16,830 28,794 5,984,016 20,129 2,070 Home equity 647,175 3,247 3,046 6,293 653,468 5,310 216 1-4 family mortgages 350,980 2,680 2,194 4,874 355,854 3,416 528 Installment 136,780 753 69 822 137,602 20 69 Total consumer loans 1,134,935 6,680 5,309 11,989 1,146,924 8,746 813 Covered loans 29,808 405 562 967 30,775 555 174 Total loans $ 7,119,965 $ 19,049 $ 22,701 $ 41,750 $ 7,161,715 $ 29,430 $ 3,057 Allowance for Credit Losses The Company maintains an allowance for credit losses at a level deemed adequate by management to absorb estimated losses inherent in the existing loan portfolio. See Note 1 , " Summary of Significant Accounting Policies ," for the accounting policy for the allowance for credit losses. A rollforward of the allowance for credit losses by portfolio segment for the quarters and nine months ended September 30, 2016 and 2015 is presented in the table below. Allowance for Credit Losses by Portfolio Segment (Dollar amounts in thousands) Commercial, Industrial, and Agricultural Office, Retail, and Industrial Multi- family Construction Other Commercial Real Estate Consumer Covered Loans Reserve for Unfunded Commitments Total Allowance for Credit Losses Quarter ended September 30, 2016 Beginning balance $ 40,084 $ 12,985 $ 2,926 $ 2,239 $ 7,474 $ 13,003 $ 1,394 $ 1,400 $ 81,505 Charge-offs (1,760 ) (2,193 ) — — (509 ) (1,488 ) — — (5,950 ) Recoveries 615 42 69 9 94 326 — — 1,155 Net charge-offs (1,145 ) (2,151 ) 69 9 (415 ) (1,162 ) — — (4,795 ) Provision for loan losses and other 3,579 3,019 1,048 916 1,488 50 (102 ) (400 ) 9,598 Ending balance $ 42,518 $ 13,853 $ 4,043 $ 3,164 $ 8,547 $ 11,891 $ 1,292 $ 1,000 $ 86,308 Quarter ended September 30, 2015 Beginning balance $ 33,729 $ 11,345 $ 2,451 $ 1,890 $ 6,367 $ 10,820 $ 4,861 $ 1,816 $ 73,279 Charge-offs (1,948 ) (563 ) (68 ) — (598 ) (1,172 ) (8 ) — (4,357 ) Recoveries 347 106 1 114 506 213 7 — 1,294 Net charge-offs (1,601 ) (457 ) (67 ) 114 (92 ) (959 ) (1 ) — (3,063 ) Provision for loan losses and other 3,247 967 226 (559 ) (181 ) 1,144 (744 ) (591 ) 3,509 Ending balance $ 35,375 $ 11,855 $ 2,610 $ 1,445 $ 6,094 $ 11,005 $ 4,116 $ 1,225 $ 73,725 Nine months ended September 30, 2016 Beginning balance $ 37,074 $ 13,116 $ 2,462 $ 1,440 $ 6,088 $ 11,812 $ 1,638 $ 1,225 $ 74,855 Charge-offs (5,684 ) (4,358 ) (288 ) (134 ) (2,833 ) (3,973 ) (2 ) — (17,272 ) Recoveries 1,693 153 95 44 314 975 — — 3,274 Net charge-offs (3,991 ) (4,205 ) (193 ) (90 ) (2,519 ) (2,998 ) (2 ) — (13,998 ) Provision for loan losses and other 9,435 4,942 1,774 1,814 4,978 3,077 (344 ) (225 ) 25,451 Ending balance $ 42,518 $ 13,853 $ 4,043 $ 3,164 $ 8,547 $ 11,891 $ 1,292 $ 1,000 $ 86,308 Nine months ended September 30, 2015 Beginning balance $ 29,458 $ 10,992 $ 2,249 $ 2,297 $ 8,327 $ 12,145 $ 7,226 $ 1,816 $ 74,510 Charge-offs (13,524 ) (2,613 ) (565 ) (15 ) (2,442 ) (2,723 ) (634 ) — (22,516 ) Recoveries 1,993 460 8 334 1,902 853 120 — 5,670 Net charge-offs (11,531 ) (2,153 ) (557 ) 319 (540 ) (1,870 ) (514 ) — (16,846 ) Provision for loan losses and other 17,448 3,016 918 (1,171 ) (1,693 ) 730 (2,596 ) (591 ) 16,061 Ending balance $ 35,375 $ 11,855 $ 2,610 $ 1,445 $ 6,094 $ 11,005 $ 4,116 $ 1,225 $ 73,725 The table below provides a breakdown of loans and the related allowance for credit losses by portfolio segment as of September 30, 2016 and December 31, 2015 . Loans and Related Allowance for Credit Losses by Portfolio Segment (Dollar amounts in thousands) Loans Allowance for Credit Losses Individually Evaluated for Impairment Collectively Evaluated for Impairment PCI Total Individually Evaluated for Impairment Collectively Evaluated for Impairment PCI Total As of September 30, 2016 Commercial, industrial, and agricultural $ 11,903 $ 3,242,734 $ 4,333 $ 3,258,970 $ — $ 41,880 $ 638 $ 42,518 Commercial real estate: Office, retail, and industrial 16,459 1,507,622 12,957 1,537,038 20 12,459 1,374 13,853 Multi-family 398 612,554 12,353 625,305 — 3,840 203 4,043 Construction 34 397,206 4,617 401,857 — 3,014 150 3,164 Other commercial real estate 1,813 955,735 13,307 970,855 17 7,442 1,088 8,547 Total commercial real estate 18,704 3,473,117 43,234 3,535,055 37 26,755 2,815 29,607 Total corporate loans 30,607 6,715,851 47,567 6,794,025 37 68,635 3,453 72,125 Consumer — 1,343,225 10,210 1,353,435 — 11,369 522 11,891 Covered loans — 16,094 8,228 24,322 — 119 1,173 1,292 Reserve for unfunded commitments — — — — — 1,000 — 1,000 Total loans $ 30,607 $ 8,075,170 $ 66,005 $ 8,171,782 $ 37 $ 81,123 $ 5,148 $ 86,308 As of December 31, 2015 Commercial, industrial, and agricultural $ 2,871 $ 2,902,361 $ 6,934 $ 2,912,166 $ 883 $ 35,378 $ 813 $ 37,074 Commercial real estate: Office, retail, and industrial 6,162 1,376,789 12,503 1,395,454 715 10,833 1,568 13,116 Multi-family 800 526,037 1,487 528,324 — 2,367 95 2,462 Construction 178 212,671 4,033 216,882 — 1,160 280 1,440 Other commercial real estate 3,665 913,161 14,364 931,190 — 5,367 721 6,088 Total commercial real estate 10,805 3,028,658 32,387 3,071,850 715 19,727 2,664 23,106 Total corporate loans 13,676 5,931,019 39,321 5,984,016 1,598 55,105 3,477 60,180 Consumer — 1,135,959 10,965 1,146,924 — 11,425 387 11,812 Covered loans — 20,856 9,919 30,775 — 248 1,390 1,638 Reserve for unfunded commitments — — — — — 1,225 — 1,225 Total loans $ 13,676 $ 7,087,834 $ 60,205 $ 7,161,715 $ 1,598 $ 68,003 $ 5,254 $ 74,855 Loans Individually Evaluated for Impairment The following table presents loans individually evaluated for impairment by class of loan as of September 30, 2016 and December 31, 2015 . PCI loans are excluded from this disclosure. Impaired Loans Individually Evaluated by Class (Dollar amounts in thousands) As of September 30, 2016 As of December 31, 2015 Recorded Investment In Recorded Investment In Loans with No Specific Reserve Loans with a Specific Reserve Unpaid Principal Balance Specific Reserve Loans with No Specific Reserve Loans with a Specific Reserve Unpaid Principal Balance Specific Reserve Commercial and industrial $ 11,903 $ — $ 13,984 $ — $ 1,673 $ 1,198 $ 4,592 $ 883 Agricultural — — — — — — — — Commercial real estate: Office, retail, and industrial 15,784 675 21,072 20 4,654 1,508 12,083 715 Multi-family 398 — 398 — 800 — 941 — Construction 34 — 34 — 178 — 299 — Other commercial real estate 1,543 270 2,599 17 3,665 — 4,403 — Total commercial real estate 17,759 945 24,103 37 9,297 1,508 17,726 715 Total impaired loans individually evaluated for impairment $ 29,662 $ 945 $ 38,087 $ 37 $ 10,970 $ 2,706 $ 22,318 $ 1,598 The following table presents the average recorded investment and interest income recognized on impaired loans by class for the quarters and nine months ended September 30, 2016 and 2015 . PCI loans are excluded from this disclosure. Average Recorded Investment and Interest Income Recognized on Impaired Loans by Class (Dollar amounts in thousands) Quarters Ended September 30, 2016 2015 Average Interest Income Recognized (1) Average Interest Income Recognized (1) Commercial and industrial $ 7,829 $ 57 $ 5,968 $ 37 Agricultural — — — — Commercial real estate: Office, retail, and industrial 16,101 3 8,814 4 Multi-family 399 11 925 12 Construction 34 — 2,995 118 Other commercial real estate 2,561 — 3,442 15 Total commercial real estate 19,095 14 16,176 149 Total impaired loans $ 26,924 $ 71 $ 22,144 $ 186 Nine Months Ended September 30, 2016 2015 Average Interest (1) Average Interest (1) Commercial and industrial $ 5,312 $ 107 $ 10,457 $ 113 Agricultural — — — — Commercial real estate: Office, retail, and industrial 12,012 80 10,158 37 Multi-family 500 12 868 13 Construction 70 — 4,833 118 Other commercial real estate 3,190 72 3,222 34 Total commercial real estate 15,772 164 19,081 202 Total impaired loans $ 21,084 $ 271 $ 29,538 $ 315 (1) Recorded using the cash basis of accounting. Credit Quality Indicators Corporate loans and commitments are assessed for credit risk and assigned ratings based on various characteristics, such as the borrower's cash flow, leverage, and collateral. Ratings for commercial credits are reviewed periodically. The following tables present credit quality indicators by class for corporate and consumer loans, excluding covered loans, as of September 30, 2016 and December 31, 2015 . Corporate Credit Quality Indicators by Class, Excluding Covered Loans (Dollar amounts in thousands) Pass Special Mention (1) (4) Substandard (2) (4) Non-accrual (3) Total As of September 30, 2016 Commercial and industrial $ 2,643,655 $ 110,716 $ 81,205 $ 13,823 $ 2,849,399 Agricultural 375,484 17,735 16,168 184 409,571 Commercial real estate: Office, retail, and industrial 1,444,815 38,672 35,881 17,670 1,537,038 Multi-family 616,820 4,399 3,770 316 625,305 Construction 389,174 69 12,327 287 401,857 Other commercial real estate 941,072 12,427 13,995 3,361 970,855 Total commercial real estate 3,391,881 55,567 65,973 21,634 3,535,055 Total corporate loans $ 6,411,020 $ 184,018 $ 163,346 $ 35,641 $ 6,794,025 As of December 31, 2015 Commercial and industrial $ 2,379,992 $ 86,263 $ 52,884 $ 5,587 $ 2,524,726 Agricultural 381,523 — 5,562 355 387,440 Commercial real estate: Office, retail, and industrial 1,320,164 32,627 35,788 6,875 1,395,454 Multi-family 517,412 6,146 3,970 796 528,324 Construction 201,496 4,678 9,803 905 216,882 Other commercial real estate 898,746 13,179 13,654 5,611 931,190 Total commercial real estate 2,937,818 56,630 63,215 14,187 3,071,850 Total corporate loans $ 5,699,333 $ 142,893 $ 121,661 $ 20,129 $ 5,984,016 (1) Loans categorized as special mention exhibit potential weaknesses that require the close attention of management since these potential weaknesses may result in the deterioration of repayment prospects in the future. (2) Loans categorized as substandard exhibit well-defined weaknesses that may jeopardize the liquidation of the debt. These loans continue to accrue interest because they are well secured and collection of principal and interest is expected within a reasonable time. (3) Loans categorized as non-accrual exhibit well-defined weaknesses that may jeopardize the liquidation of the debt or result in a loss if the deficiencies are not corrected. (4) Total special mention and substandard loans includes accruing TDR s of $841,000 as of September 30, 2016 and $862,000 as of December 31, 2015 . Consumer Credit Quality Indicators by Class, Excluding Covered Loans (Dollar amounts in thousands) Performing Non-accrual Total As of September 30, 2016 Home equity $ 728,344 $ 4,916 $ 733,260 1-4 family mortgages 384,905 3,240 388,145 Installment 232,030 — 232,030 Total consumer loans $ 1,345,279 $ 8,156 $ 1,353,435 As of December 31, 2015 Home equity $ 648,158 $ 5,310 $ 653,468 1-4 family mortgages 352,438 3,416 355,854 Installment 137,582 20 137,602 Total consumer loans $ 1,138,178 $ 8,746 $ 1,146,924 TDR s TDR s are generally performed at the request of the individual borrower and may include forgiveness of principal, reduction in interest rates, changes in payments, and maturity date extensions. The table below presents TDR s by class as of September 30, 2016 and December 31, 2015 . See Note 1, "Summary of Significant Accounting Policies," for the accounting policy for TDR s. TDR s by Class (Dollar amounts in thousands) As of September 30, 2016 As of December 31, 2015 Accruing Non-accrual (1) Total Accruing Non-accrual (1) Total Commercial and industrial $ 286 $ 150 $ 436 $ 294 $ 1,050 $ 1,344 Commercial real estate: Office, retail, and industrial 157 — 157 164 — 164 Multi-family 588 172 760 598 186 784 Other commercial real estate 324 — 324 340 — 340 Total commercial real estate 1,069 172 1,241 1,102 186 1,288 Total corporate loans 1,355 322 1,677 1,396 1,236 2,632 Home equity 181 879 1,060 494 667 1,161 1-4 family mortgages 832 389 1,221 853 421 1,274 Total consumer loans 1,013 1,268 2,281 1,347 1,088 2,435 Total loans $ 2,368 $ 1,590 $ 3,958 $ 2,743 $ 2,324 $ 5,067 (1) These TDR s are included in non-accrual loans in the preceding tables. TDR s are included in the calculation of the allowance for credit losses in the same manner as impaired loans. There were no specific reserves related to TDR s as of September 30, 2016 and there were $758,000 in specific reserves related to TDR s as of December 31, 2015 . No TDR s were restructured during the quarters and nine months ended September 30, 2016 and 2015. Accruing TDR s that do not perform in accordance with their modified terms are transferred to non-accrual. There were no material TDR s that defaulted within twelve months of the restructure date during the quarters and nine months ended September 30, 2016 and 2015 . A rollforward of the carrying value of TDR s for the quarters and nine months ended September 30, 2016 and 2015 is presented in the following table. TDR Rollforward (Dollar amounts in thousands) Quarters Ended Nine Months Ended 2016 2015 2016 2015 Accruing Beginning balance $ 2,491 $ 3,067 $ 2,743 $ 3,704 Additions — 120 — 120 Net payments received (22 ) (355 ) (91 ) (746 ) Returned to performing status — — — — Net transfers to non-accrual (101 ) (61 ) (284 ) (307 ) Ending balance 2,368 2,771 2,368 2,771 Non-accrual Beginning balance 1,690 2,070 2,324 19,904 Additions — 325 — 325 Net payments received (31 ) (29 ) (609 ) (15,483 ) Charge-offs (170 ) (61 ) (409 ) (2,687 ) Net transfers from accruing 101 61 284 307 Ending balance 1,590 2,366 1,590 2,366 Total TDRs $ 3,958 $ 5,137 $ 3,958 $ 5,137 For TDR s to be removed from TDR status in the calendar year after the restructuring, the loans must (i) have an interest rate and terms that reflect market conditions at the time of restructuring, and (ii) be in compliance with the modified terms. Loans that were not restructured at market rates and terms, that are not in compliance with the modified terms, or for which there is a concern about the future ability of the borrower to meet its obligations under the modified terms, continue to be separately reported as restructured until paid in full or charged-off. There were no material commitments to lend additional funds to borrowers with TDR s as of September 30, 2016 and December 31, 2015 .

Premises, Furniture, and Equipm

Premises, Furniture, and Equipment	9 Months Ended
	Sep. 30, 2016
Property, Plant and Equipment [Abstract]
Premises, Furniture, and Equipment	PREMISES, FURNITURE, AND EQUIPMENT The following table summarizes the Company's premises, furniture, and equipment by category. Premises, Furniture, and Equipment (Dollar amounts in thousands) As of September 30, December 31, Land $ 19,472 $ 43,442 Premises 96,178 152,444 Furniture and equipment 103,326 90,672 Total cost 218,976 286,558 Accumulated depreciation (141,500 ) (171,708 ) Net book value of premises, furniture, and equipment 77,476 114,850 Assets held-for-sale 4,967 7,428 Total premises, furniture, and equipment $ 82,443 $ 122,278 On September 27, 2016, First Midwest Bank (the "Bank") completed a sale-leaseback transaction, whereby the Bank sold to a third party for an aggregate cash purchase price of $150.3 million , 55 properties with book values totaling $58.8 million , owned and operated by the Bank as branches. Upon the sale of the branches the Bank concurrently entered into triple net lease agreements with certain affiliates of the third party for each of the branches sold. Subject to the right of the Bank to terminate certain of the lease agreements at the end of the eleventh year, the lease agreements have initial terms of 14 years. Each lease agreement provides the Bank with five consecutive renewal options of five years each. The sale-leaseback transaction resulted in a pre-tax gain of $88.0 million , net of transaction related expenses, of which $5.5 million was immediately recognized in earnings. The remaining pre-tax gain of $82.5 million will be deferred and accreted into income on a straight-line basis over the initial terms of the leases. Aggregate first year rent expense to be paid under the sale-leaseback transaction is approximately $10.5 million with a 1.50% annual rent escalation during the initial term and during the first and second five-year renewal periods. Assets held-for-sale as of September 30, 2016 and December 31, 2015 consists of former branches that are no longer in operation and parcels of land previously purchased for expansion. Depreciation on premises, furniture, and equipment totaled $3.4 million and $10.1 million for the quarter and nine months ended September 30, 2016 , respectively. Depreciation on premises, furniture, and equipment totaled $3.4 million and $10.1 million for the same periods in 2015 . Operating Leases As of September 30, 2016 , the Company was obligated to utilize certain premises and equipment under certain non-cancelable operating leases, which expire at various dates through the year ending December 31, 2031 . Many of these leases contain renewal options and certain leases provide options to purchase the leased property during or at the expiration of the lease period at specific prices. Some leases contain escalation clauses calling for rentals to be adjusted for increased real estate taxes and other operating expenses or proportionately adjusted for increases in consumer or other price indices. The following summary reflects the future minimum payments by year required under operating leases that have initial or remaining non-cancelable lease terms in excess of one year as of September 30, 2016 . Future Minimum Operating Lease Payments (Dollar amounts in thousands) Total One year or less $ 21,332 After one year to two years 18,083 After two years to three years 16,762 After three years to four years 15,882 After four years to five years 14,476 After five years 109,752 Total minimum lease payments $ 196,287 Deferred pre-tax gains of $82.5 million related to the sale-lease back transaction will be accreted as a reduction to lease expense in other expenses on the Condensed Consolidated Statements of Income on a straight-line basis over the initial terms of the leases. As part of the acquisition of the Chicago area banking operations of Banco Popular North America completed in 2014, the Company assumed certain operating leases related to various branches. On the date of acquisition, an intangible liability of $10.6 million was recorded as the cash flows of the leases exceeded the fair market value. This intangible liability will be accreted into income as a reduction to net occupancy and equipment expense using the straight-line method over the initial term of each lease, which expire between 2018 to 2030. The intangible liability is included in accrued interest and other liabilities in the Consolidated Statements of Financial Condition. The following table presents the remaining scheduled accretion of the intangible liability by year. Scheduled Accretion of Operating Lease Intangible (Dollar amounts in thousands) Total One year or less $ 1,180 After one year to two years 1,011 After two years to three years 742 After three years to four years 648 After four years to five years 648 After five years 4,159 Total accretion $ 8,388 The following table presents net operating lease expense for the quarters and nine months ended September 30, 2016 and 2015 . Net Operating Lease Expense (Dollar amounts in thousands) Quarters Ended Nine Months Ended 2016 2015 2016 2015 Lease expense charged to operations (1) $ 1,950 $ 1,438 $ 4,902 $ 4,282 Rental income from premises leased to others (2) 118 167 404 454 Net operating lease expense $ 1,832 $ 1,271 $ 4,498 $ 3,828 (1) Includes amounts paid under short-term cancelable leases and is included in net occupancy and equipment expense in the Condensed Consolidated Statements of Income. For the quarter and nine months ended September 30, 2016 , lease expense is net of accretion related to the intangible liability of $295,000 and $876,000 , respectively. For the same periods in 2015 , lease expense is net of accretion related to the intangible liability of $286,000 and $858,000 . (2) Included as a reduction to net occupancy and equipment expense in the Condensed Consolidated Statements of Income.

Borrowed Funds

Borrowed Funds	9 Months Ended
	Sep. 30, 2016
Debt Disclosure [Abstract]
Borrowed Funds	BORROWED FUNDS The following table summarizes the Company 's borrowed funds by funding source. Summary of Borrowed Funds (Dollar amounts in thousands) As of September 30, December 31, Securities sold under agreements to repurchase $ 114,539 $ 155,196 FHLB advances 525,000 9,900 Total borrowed funds $ 639,539 $ 165,096 Securities sold under agreements to repurchase are treated as financings and the obligations to repurchase securities sold are included as a liability in the Consolidated Statements of Financial Condition. Repurchase agreements are secured by U.S. treasury and agency securities. The securities underlying the agreements remain in the respective asset accounts. The Bank is a member of the FHLB and has access to term financing from the FHLB . These advances are secured by designated assets that may include qualifying commercial real estate, residential and multi-family mortgages, home equity loans, and municipal and mortgage-backed securities. As of September 30, 2016 , the Company held various short-term FHLB advances with fixed interest rates that range from 0.40% to 0.48% and maturity dates that range from October 3, 2016 to December 1, 2016. The Company hedges interest rates on borrowed funds using interest rate swaps through which the Company receives variable amounts and pays fixed amounts. See Note 12 "Derivative Instruments and Hedging Activities" for a detailed discussion of interest rate swaps. On September 27, 2016, the Company entered into a loan agreement with U.S. Bank National Association providing for a $50.0 million short-term, unsecured revolving credit facility. Advances will bear interest at a rate equal to one-month LIBOR plus 1.75% , adjusted on a monthly basis, and the Company must pay an unused facility fee equal to 0.35% per annum on a quarterly basis. The line of credit will mature on September 26, 2017. Management expects to use this line of credit for general corporate purposes. As of September 30, 2016 , no amount was outstanding under the facility.

Senior and Subordinated Debt

Senior and Subordinated Debt	9 Months Ended
	Sep. 30, 2016
Debt Disclosure [Abstract]
Senior and Subordinated Debt	SENIOR AND SUBORDINATED DEBT The following table presents the Company 's senior and subordinated debt by issuance. Senior and Subordinated Debt (Dollar amounts in thousands) As of Issuance Date Maturity Date Interest Rate September 30, December 31, 2015 Senior notes November 2011 November 2016 5.875% $ 114,983 $ 114,891 Subordinated notes: Due in 2026 September 2016 September 2026 5.875% 146,484 — Due in 2016 March 2006 April 2016 5.850% — 38,499 Junior subordinated debentures: First Midwest Capital Trust I ("FMCT") November 2003 December 2033 6.950% 37,800 37,799 Great Lakes Statutory Trust II ("GLST II") (1) December 2005 December 2035 L+1.400% (2) 4,367 4,296 Great Lakes Statutory Trust III ("GLST III") (1) June 2007 September 2037 L+1.700% (2) 5,810 5,723 Total junior subordinated debentures 47,977 47,818 Total senior and subordinated debt $ 309,444 $ 201,208 (1) The junior subordinated debentures related to GLST II and GLST III were assumed by the Company during 2014 through the acquisition of Great Lakes Financial Resources, Inc., the holding company for Great Lakes Bank. These amounts include acquisition adjustments which resulted in a discount of $1.8 million to GLST II and $2.4 million to GLST III as of September 30, 2016 and $1.9 million to GLST II and $2.5 million to GLST III as of December 31, 2015 . (2) The interest rates are a variable rate based on the three-month LIBOR plus 1.400% and 1.700% for GLST II and GLST III, respectively. On April 1, 2016, $38.5 million of 5.850% subordinated notes matured and were repaid by the Company . On November 22, 2016, $115.0 million of 5.875% senior notes will mature. Issuance of Subordinated Notes On September 29, 2016, the Company completed the issuance and sale of $150.0 million aggregate principal amount of its 5.875% subordinated notes due 2026. Interest on the notes is payable semi-annually on March 29 and September 29, beginning on March 29, 2017. The Company received proceeds of $146.5 million , net of underwriting discounts and commissions and issuance costs. The Company expects to use the net proceeds to repay at maturity the entire $115.0 million aggregate principal amount outstanding of its 5.875% senior notes due November 22, 2016, plus accrued interest, and for other general corporate purposes. Junior Subordinated Debentures FMCT , GLST II , and GLST III are Delaware statutory business trusts. These trusts were established for the purpose of issuing trust-preferred securities and lending the proceeds to the Company in return for junior subordinated debentures of the Company. The junior subordinated debentures are the sole assets of each trust. Therefore, each trust's ability to pay amounts due on the trust-preferred securities is solely dependent on the Company making payments on the related junior subordinated debentures. The trust-preferred securities are subject to mandatory redemption, in whole or in part, on repayment of the junior subordinated debentures at the stated maturity date or on redemption. The Company guarantees payments of distributions and redemptions on the trust-preferred securities on a limited basis. Trust-preferred securities are included in Tier 1 capital of the Company for regulatory capital purposes. The statutory trusts qualify as VIEs for which the Company is not the primary beneficiary. Consequently, the accounts of those entities are not consolidated in the Company's financial statements.

Earnings Per Common Share

Earnings Per Common Share	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Earnings Per Common Share	EARNINGS PER COMMON SHARE The table below displays the calculation of basic and diluted earnings per common share (" EPS "). Basic and Diluted EPS (Amounts in thousands, except per share data) Quarters Ended Nine Months Ended 2016 2015 2016 2015 Net income $ 28,402 $ 23,284 $ 71,631 $ 65,740 Net income applicable to non-vested restricted shares (324 ) (226 ) (826 ) (703 ) Net income applicable to common shares $ 28,078 $ 23,058 $ 70,805 $ 65,037 Weighted-average common shares outstanding: Weighted-average common shares outstanding (basic) 80,396 77,106 79,589 77,038 Dilutive effect of common stock equivalents 13 13 13 13 Weighted-average diluted common shares outstanding 80,409 77,119 79,602 77,051 Basic EPS $ 0.35 $ 0.30 $ 0.89 $ 0.84 Diluted EPS $ 0.35 $ 0.30 $ 0.89 $ 0.84 Anti-dilutive shares not included in the computation of diluted EPS (1) 454 751 510 822 (1) This amount represents outstanding stock options for which the exercise price is greater than the average market price of the Company's common stock.

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	9 Months Ended
	Sep. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities	DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES In the ordinary course of business, the Company enters into derivative transactions as part of its overall interest rate risk management strategy. The significant accounting policies related to derivative instruments and hedging activities are presented in Note 1, "Summary of Significant Accounting Policies." Fair Value Hedges The Company hedges the fair value of fixed rate commercial real estate loans using interest rate swaps through which the Company pays fixed amounts and receives variable amounts. These derivative contracts are designated as fair value hedges. Fair Value Hedges (Dollar amounts in thousands) As of September 30, 2016 December 31, 2015 Gross notional amount outstanding $ 10,710 $ 11,620 Derivative liability fair value (399 ) (643 ) Weighted-average interest rate received 2.44 % 2.25 % Weighted-average interest rate paid 6.35 % 6.36 % Weighted-average maturity (in years) 1.24 1.97 Fair value of derivative (1) $ 418 $ 665 (1) This amount represents the fair value if credit risk related contingent features were triggered. Hedge ineffectiveness is recognized in other noninterest income in the Condensed Consolidated Statements of Income. For the quarters and nine months ended September 30, 2016 and 2015 , gains or losses related to fair value hedge ineffectiveness were not material. Cash Flow Hedges As of September 30, 2016 , the Company hedged $710.0 million of certain corporate variable rate loans using interest rate swaps through which the Company receives fixed amounts and pays variable amounts. The Company also hedged $710.0 million of borrowed funds using forward starting interest rate swaps through which the Company receives variable amounts and pays fixed amounts. These transactions allow the Company to add stability to net interest income and manage its exposure to interest rate movements. Forward starting interest rate swaps totaling $325.0 million began on various dates between June of 2015 and June of 2016, and mature between June and August of 2019. The remaining forward starting interest rate swaps begin at various dates between February of 2017 and May of 2018 and mature between February and May of 2020. These derivative contracts are designated as cash flow hedges. Cash Flow Hedges (Dollar amounts in thousands) As of September 30, 2016 December 31, 2015 Gross notional amount outstanding $ 1,420,000 $ 1,220,000 Derivative asset fair value 15,093 4,787 Derivative liability fair value (14,836 ) (8,950 ) Weighted-average interest rate received 1.32 % 1.24 % Weighted-average interest rate paid 1.04 % 0.75 % Weighted-average maturity (in years) 3.04 3.91 The effective portion of gains or losses on cash flow hedges is recorded in accumulated other comprehensive loss on an after-tax basis and is subsequently reclassified to interest income or expense in the period that the forecasted hedged item impacts earnings. Hedge effectiveness is determined using a regression analysis at the inception of the hedge relationship and on an ongoing basis. For the quarters and nine months ended September 30, 2016 and 2015, there were no material gains or losses related to cash flow hedge ineffectiveness. As of September 30, 2016 , the Company estimates that $3.7 million will be reclassified from accumulated other comprehensive loss as an increase to interest income over the next twelve months. Other Derivative Instruments The Company also enters into derivative transactions with its commercial customers and simultaneously enters into offsetting interest rate derivative transactions with third parties. This transaction allows the Company's customers to effectively convert a variable rate loan into a fixed rate loan. Due to the offsetting nature of these transactions, the Company does not apply hedge accounting treatment. The Company's credit exposure on these derivative transactions results primarily from counterparty credit risk. The credit valuation adjustment (" CVA ") is a fair value adjustment to the derivative to account for this risk. As of September 30, 2016 and December 31, 2015 , the Company's credit exposure was fully secured by the underlying collateral on customer loans and mitigated through netting arrangements with third parties, therefore, no CVA was recorded. Transaction fees related to commercial customer derivative instruments of $2.9 million and $8.2 million were recorded in noninterest income for the quarter and nine months ended September 30, 2016 , respectively. There were $1.2 million and $2.7 million of transaction fees recorded for the quarter and nine months ended September 30, 2015 , respectively. Other Derivative Instruments (Dollar amounts in thousands) As of September 30, 2016 December 31, 2015 Gross notional amount outstanding $ 1,462,702 $ 853,385 Derivative asset fair value 29,835 11,446 Derivative liability fair value (29,835 ) (11,446 ) Fair value of derivative (1) 30,451 11,939 (1) This amount represents the fair value if credit risk related contingent features were triggered. The Company occasionally enters into risk participation agreements with counterparty banks to transfer or assume a portion of the credit risk related to customer transactions. The amounts of these instruments were not material for any periods presented. The Company had no other derivative instruments as of September 30, 2016 and December 31, 2015 . The Company does not enter into derivative transactions for purely speculative purposes. Credit Risk Derivative instruments are inherently subject to credit risk, which represents the Company's risk of loss when the counterparty to a derivative contract fails to perform according to the terms of the agreement. Credit risk is managed by limiting and collateralizing the aggregate amount of net unrealized losses by transaction, monitoring the size and the maturity structure of the derivatives, and applying uniform credit standards. Company policy establishes limits on credit exposure to any single counterparty. In addition, the Company established bilateral collateral agreements with derivative counterparties that provide for exchanges of marketable securities or cash to collateralize either party's net losses above a stated minimum threshold. As of September 30, 2016 and December 31, 2015 , these collateral agreements covered 100% of the fair value of the Company's outstanding fair value hedges. Derivative assets and liabilities are presented gross, rather than net, of pledged collateral amounts. Certain derivative instruments are subject to master netting agreements with counterparties. The Company records these transactions at their gross fair values and does not offset derivative assets and liabilities in the Consolidated Statements of Financial Condition. The following table presents the fair value of the Company's derivatives and offsetting positions as of September 30, 2016 and December 31, 2015 . Fair Value of Offsetting Derivatives (Dollar amounts in thousands) As of September 30, 2016 As of December 31, 2015 Assets Liabilities Assets Liabilities Gross amounts recognized $ 44,928 $ 45,070 $ 16,233 $ 21,039 Less: amounts offset in the Consolidated Statements of Financial Condition — — — — Net amount presented in the Consolidated Statements of Financial Condition (1) 44,928 45,070 16,233 21,039 Gross amounts not offset in the Consolidated Statements of Financial Condition: Offsetting derivative positions (15,245 ) (15,245 ) (4,791 ) (4,791 ) Cash collateral pledged — (29,825 ) — (16,248 ) Net credit exposure $ 29,683 $ — $ 11,442 $ — (1) Included in other assets or other liabilities in the Consolidated Statements of Financial Condition. As of September 30, 2016 and December 31, 2015 , the Company's derivative instruments generally contained provisions that require the Company's debt to remain above a certain credit rating by each of the major credit rating agencies or that the Company maintain certain capital levels. If the Company's debt were to fall below that credit rating or the Company's capital were to fall below the required levels, it would be in violation of those provisions, and the counterparties to the derivative instruments could terminate the swap transaction and demand cash settlement of the derivative instrument in an amount equal to the derivative liability fair value. As of September 30, 2016 and December 31, 2015 the Company was in compliance with these provisions.

Commitments, Guarantees, and Co

Commitments, Guarantees, and Contingent Liabilities	9 Months Ended
	Sep. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments, Guarantees, and Contingent Liabilities	COMMITMENTS, GUARANTEES, AND CONTINGENT LIABILITIES Credit Commitments and Guarantees In the normal course of business, the Company enters into a variety of financial instruments with off-balance sheet risk to meet the financing needs of its customers and to conduct lending activities, including commitments to extend credit and standby and commercial letters of credit. These instruments involve elements of credit and interest rate risk in excess of the amount recognized in the Consolidated Statements of Financial Condition. Contractual or Notional Amounts of Financial Instruments (Dollar amounts in thousands) As of September 30, 2016 December 31, 2015 Commitments to extend credit: Commercial, industrial, and agricultural $ 1,462,813 $ 1,303,056 Commercial real estate 439,518 366,250 Home equity 387,194 352,114 Other commitments (1) 215,226 203,121 Total commitments to extend credit $ 2,504,751 $ 2,224,541 Letters of credit $ 107,461 $ 100,610 Recourse on assets sold: Unpaid principal balance of loans sold $ 187,891 $ 196,389 Carrying value of recourse obligation (2) 125 87 (1) Other commitments includes installment and overdraft protection program commitments. (2) Included in other liabilities in the Consolidated Statements of Financial Condition. Commitments to extend credit are agreements to lend funds to a customer, subject to contractual terms and covenants. Commitments generally have fixed expiration dates or other termination clauses, variable interest rates, and fee requirements, when applicable. Since many of the commitments are expected to expire without being drawn, the total commitment amounts do not necessarily represent future cash flow requirements. In the event of a customer's non-performance, the Company's credit loss exposure is equal to the contractual amount of the commitments. The credit risk is essentially the same as extending loans to customers. The Company uses the same credit policies for credit commitments as its loans and minimizes exposure to credit loss through various collateral requirements. Letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. Letters of credit generally are contingent on the failure of the customer to perform according to the terms of the contract with the third party and are often issued in favor of a municipality where construction is taking place to ensure the borrower adequately completes the construction. Commercial letters of credit are issued to facilitate transactions between a customer and a third party based on agreed upon terms. The maximum potential future payments guaranteed by the Company under letters of credit arrangements are equal to the contractual amount of the commitment. If a commitment is funded, the Company may seek recourse through the liquidation of the underlying collateral, including real estate, production plants and property, marketable securities, or receipt of cash. As a result of the sale of certain 1-4 family mortgage loans, the Company is contractually obligated to repurchase any non-performing loans or loans that do not meet underwriting requirements at recorded value. In accordance with the sales agreements, there is no limitation to the maximum potential future payments or expiration of the Company's recourse obligation. There were no material loan repurchases during the quarters and nine months ended September 30, 2016 and 2015 . Legal Proceedings In the ordinary course of business, there were certain legal proceedings pending against the Company and its subsidiaries at September 30, 2016 . While the outcome of any legal proceeding is inherently uncertain, based on information currently available, the Company's management does not expect that any liabilities arising from pending legal matters will have a material adverse effect on the Company's financial position, results of operations, or cash flows.

Fair Value

Fair Value	9 Months Ended
	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value	FAIR VALUE Fair value represents the amount expected to be received to sell an asset or paid to transfer a liability in its principal or most advantageous market in an orderly transaction between market participants at the measurement date. In accordance with fair value accounting guidance, the Company measures, records, and reports various types of assets and liabilities at fair value on either a recurring or non-recurring basis in the Consolidated Statements of Financial Condition. Those assets and liabilities are presented below in the sections titled "Assets and Liabilities Required to be Measured at Fair Value on a Recurring Basis" and "Assets and Liabilities Required to be Measured at Fair Value on a Non-Recurring Basis." Other assets and liabilities are not required to be measured at fair value in the Consolidated Statements of Financial Condition, but must be disclosed at fair value. See the "Fair Value Measurements of Other Financial Instruments" section of this note. Any aggregation of the estimated fair values presented in this note does not represent the value of the Company. Depending on the nature of the asset or liability, the Company uses various valuation methodologies and assumptions to estimate fair value. GAAP provides a three-tiered fair value hierarchy based on the inputs used to measure fair value. The hierarchy is defined as follows: • Level 1 - Quoted prices in active markets for identical assets or liabilities. • Level 2 - Observable inputs other than level 1 prices, such as quoted prices for similar instruments, quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data. • Level 3 - Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. These inputs require significant management judgment or estimation, some of which use model-based techniques and may be internally developed. Assets and liabilities are assigned to a level within the fair value hierarchy based on the lowest level of significant input used to measure fair value. Assets and liabilities may change levels within the fair value hierarchy due to market conditions or other circumstances. Those transfers are recognized on the date of the event that prompted the transfer. There were no transfers of assets or liabilities between levels of the fair value hierarchy during the periods presented. Assets and Liabilities Required to be Measured at Fair Value on a Recurring Basis The following table provides the fair value for assets and liabilities required to be measured at fair value on a recurring basis in the Consolidated Statements of Financial Condition by level in the fair value hierarchy. Recurring Fair Value Measurements (Dollar amounts in thousands) As of September 30, 2016 As of December 31, 2015 Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Assets: Trading securities: Money market funds $ 1,707 $ — $ — $ 2,530 $ — $ — Mutual funds 16,644 — — 14,364 — — Total trading securities 18,351 — — 16,894 — — Securities available-for-sale: U.S. treasury securities 43,797 — — 16,980 — — U.S. agency securities — 192,931 — — 86,643 — CMOs — 1,081,259 — — 687,185 — MBSs — 324,484 — — 153,530 — Municipal securities — 286,713 — — 327,570 — CDOs — — 31,899 — — 31,529 Equity securities — 2,947 — — 3,199 — Total securities available-for-sale 43,797 1,888,334 31,899 16,980 1,258,127 31,529 Mortgage servicing rights ("MSRs") (1) — — 5,076 — — 1,853 Derivative assets (1) — 44,928 — — 16,233 — Liabilities: Derivative liabilities (2) $ — $ 45,070 $ — $ — $ 21,039 $ — (1) Included in other assets in the Consolidated Statements of Financial Condition. (2) Included in other liabilities in the Consolidated Statements of Financial Condition. The following sections describe the specific valuation techniques and inputs used to measure financial assets and liabilities at fair value. Trading Securities The Company's trading securities consist of diversified investment securities held in a grantor trust and are invested in money market and mutual funds. The fair value of these money market and mutual funds is based on quoted market prices in active exchange markets and is classified in level 1 of the fair value hierarchy. Securities Available-for-Sale The Company's securities available-for-sale are primarily fixed income instruments that are not quoted on an exchange, but may be traded in active markets. The fair values for these securities are based on quoted prices in active markets or market prices for similar securities obtained from external pricing services or dealer market participants and are classified in level 2 of the fair value hierarchy. The fair value of U.S. treasury securities is based on quoted market prices in active exchange markets and is classified in level 1 of the fair value hierarchy. Quarterly, the Company evaluates the methodologies used by its external pricing services to estimate the fair value of these securities to determine whether the valuations represent an exit price in the Company's principal markets. CDOs are classified in level 3 of the fair value hierarchy. The Company estimates the fair values for each CDO using discounted cash flow analyses with the assistance of a structured credit valuation firm. This methodology is based on credit analysis and historical financial data for each of the issuers underlying the CDOs (the "Issuers"). These estimates are highly subjective and sensitive to several significant, unobservable inputs. The cash flows for each Issuer are then discounted to present values using LIBOR plus an adjustment to reflect the impact of market factors. Finally, the discounted cash flows for each Issuer are aggregated to derive the estimated fair value for the specific CDO . The following table presents the ranges of significant, unobservable inputs calculated using the weighted-average of the Issuers used by the Company as of September 30, 2016 and December 31, 2015. Significant Unobservable Inputs Used in the Valuation of CDOs As of September 30, 2016 December 31, 2015 Probability of prepayment 1.8 % - 15.0% 1.8 % - 15.1% Probability of default 17.4 % - 49.0% 19.1 % - 32.6% Loss given default 93.1 % - 98.5% 93.8 % - 97.1% Probability of deferral cure 17.3 % - 100.0% 15.2 % - 63.1% Most Issuers have the right to prepay the securities on the fifth anniversary of issuance and under other limited circumstances. To estimate prepayments, a credit analysis of each Issuer is performed to estimate its ability and likelihood to fund a prepayment. If a prepayment occurs, the Company receives cash equal to the par value for the portion of the CDO associated with that Issuer. The likelihood that an Issuer who is currently deferring payment on the securities will pay all deferred amounts and remain current thereafter is based on an analysis of the Issuer's asset quality, leverage ratios, and other measures of financial viability. The impact of changes in these key inputs could result in a significantly higher or lower fair value measurement for each CDO . The timing of the default, the magnitude of the default, and the timing and magnitude of the cure probability are directly interrelated. Defaults that occur sooner and/or are greater than anticipated have a negative impact on the valuation. In addition, a high cure probability assumption has a positive effect on the fair value, and, if a cure event takes place sooner than anticipated, the impact on the valuation is also favorable. Management monitors the valuation results of each CDO on a semi-annual basis, which includes an analysis of historical pricing trends for these types of securities, overall economic conditions (such as tracking LIBOR curves), and the performance of the Issuers' industries. Annually, management validates significant assumptions by reviewing detailed back-testing performed by the structured credit valuation firm. A rollforward of the carrying value of CDOs for the quarters and nine months ended September 30, 2016 and 2015 is presented in the following table. Carrying Value of CDOs (Dollar amounts in thousands) Quarters Ended Nine Months Ended 2016 2015 2016 2015 Beginning balance $ 30,431 $ 32,004 $ 31,529 $ 33,774 Change in other comprehensive income (1) 1,794 (62 ) 764 (1,560 ) Paydowns (326 ) (72 ) (394 ) (344 ) Ending balance $ 31,899 $ 31,870 $ 31,899 $ 31,870 (1) Included in unrealized holding gains in the Consolidated Statements of Comprehensive Income. MSR s The Company services loans for others totaling $630.7 million as of September 30, 2016 and $242.9 million as of December 31, 2015 . As of September 30, 2016, loans serviced for others includes approximately $318.5 million of loans, the servicing of which transitioned from NI Bancshares to the Company as a result of the acquisition. These loans are owned by third parties and are not included in the Consolidated Statements of Financial Condition. Additional information regarding the NI Bancshares transaction is presented in Note 3 , "Acquisitions." The Company determines the fair value of MSR s by estimating the present value of expected future cash flows associated with the mortgage loans being serviced and classifies them in level 3 of the fair value hierarchy. The following table presents the ranges of significant, unobservable inputs used by the Company to determine the fair value of MSR s as of September 30, 2016 . Significant Unobservable Inputs Used in the Valuation of MSR s As of September 30, 2016 December 31, 2015 Prepayment speed 10.2 % - 29.2% 10.1 % - 20.9% Maturity (months) 12 - 80 6 - 86 Discount rate 9.5 % - 13.0% 9.5 % - 13.0% The impact of changes in these key inputs could result in a significantly higher or lower fair value measurement for MSR s. Significant increases in expected prepayment speeds and discount rates have negative impacts on the valuation. Higher maturity assumptions have a favorable effect on the estimated fair value. A rollforward of the carrying value of MSR s for the quarters and nine months ended September 30, 2016 and 2015 is presented in the following table. Carrying Value of MSR s (Dollar amounts in thousands) Quarters Ended Nine Months Ended 2016 2015 2016 2015 Beginning balance $ 4,938 $ 1,820 $ 1,853 $ 1,728 Additions from acquisition — — 3,092 — New MSRs 581 60 928 303 (Losses) gains included in earnings (1) : Changes in valuation inputs and assumptions (205 ) (12 ) (377 ) (51 ) Other changes in fair value (2) (238 ) (70 ) (420 ) (182 ) Ending balance $ 5,076 $ 1,798 $ 5,076 $ 1,798 Contractual servicing fees earned (1) $ 373 $ 136 $ 922 $ 404 (1) Included in mortgage banking income in the Condensed Consolidated Statements of Income and related to assets held as of September 30, 2016 and 2015 . (2) Primarily represents changes in expected future cash flows due to payoffs and paydowns. Derivative Assets and Derivative Liabilities The Company enters into interest rate swaps and derivative transactions with commercial customers. These derivative transactions are executed in the dealer market, and pricing is based on market quotes obtained from the counterparties. The market quotes were developed using market observable inputs, which primarily include LIBOR. Therefore, derivatives are classified in level 2 of the fair value hierarchy. For its derivative assets and liabilities, the Company also considers non-performance risk, including the likelihood of default by itself and its counterparties, when evaluating whether the market quotes from the counterparty are representative of an exit price. Assets and Liabilities Required to be Measured at Fair Value on a Non-Recurring Basis The following table provides the fair value for each class of assets and liabilities required to be measured at fair value on a non-recurring basis in the Consolidated Statements of Financial Condition by level in the fair value hierarchy. Non-Recurring Fair Value Measurements (Dollar amounts in thousands) As of September 30, 2016 As of December 31, 2015 Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Collateral-dependent impaired loans (1) $ — $ — $ 10,156 $ — $ — $ 10,519 OREO (2) — — 4,090 — — 8,581 Loans held-for-sale (3) — — 29,645 — — 14,444 Assets held-for-sale (4) — — 4,967 — — 7,428 (1) Includes impaired loans with charge-offs and impaired loans with a specific reserve during the periods presented. (2) Includes OREO with fair value adjustments subsequent to initial transfer that occurred during the periods presented. (3) Included in other assets in the Consolidated Statements of Financial Condition. (4) Included in premises, furniture, and equipment in the Consolidated Statements of Financial Condition. Collateral-Dependent Impaired Loans Certain collateral-dependent impaired loans are subject to fair value adjustments to reflect the difference between the carrying value of the loan and the value of the underlying collateral. The fair values of collateral-dependent impaired loans are primarily determined by current appraised values of the underlying collateral. Based on the age and/or type, appraisals may be adjusted in the range of 0% to 15% . In certain cases, an internal valuation may be used when the underlying collateral is located in areas where comparable sales data is limited or unavailable. Accordingly, collateral-dependent impaired loans are classified in level 3 of the fair value hierarchy. Collateral-dependent impaired loans for which the fair value is greater than the recorded investment are not measured at fair value in the Consolidated Statements of Financial Condition and are not included in this disclosure. OREO The fair value of OREO is measured using the current appraised value of the properties. In certain circumstances, a current appraisal may not be available or may not represent an accurate measurement of the property's fair value due to outdated market information or other factors. In these cases, the fair value is determined based on the lower of the (i) most recent appraised value, (ii) broker price opinion, (iii) current listing price, or (iv) signed sales contract. Given these valuation methods, OREO is classified in level 3 of the fair value hierarchy. Loans Held-for-Sale As of September 30, 2016 , loans held-for-sale consists of 1-4 family mortgage loans, which were originated with the intent to sell. These loans were recorded in the held-for-sale category at the contract price and, accordingly, are classified in level 3 of the fair value hierarchy. As of December 31, 2015 , loans held-for-sale consists of 1-4 family mortgage loans, which were originated with the intent to sell, and a commercial real estate loan. Assets Held-for-Sale Assets held-for-sale as of September 30, 2016 and December 31, 2015 consists of former branches that are no longer in operation and parcels of land previously purchased for expansion. These properties are being actively marketed and were transferred into the held-for-sale category at their fair value as determined by current appraisals. Based on these valuation methods, they are classified in level 3 of the fair value hierarchy. Financial Instruments Not Required to be Measured at Fair Value For certain financial instruments that are not required to be measured at fair value in the Consolidated Statements of Financial Condition, the Company must disclose the estimated fair values and the level within the fair value hierarchy as shown in the following table. Fair Value Measurements of Other Financial Instruments (Dollar amounts in thousands) As of September 30, 2016 December 31, 2015 Fair Value Hierarchy Level Carrying Amount Fair Value Carrying Amount Fair Value Assets: Cash and due from banks 1 $ 139,538 $ 139,538 $ 114,587 $ 114,587 Interest-bearing deposits in other banks 2 362,153 362,153 266,615 266,615 Securities held-to-maturity 2 20,337 18,110 23,152 20,054 FHLB and FRB stock 2 53,506 53,506 39,306 39,306 Loans 3 8,091,306 7,997,227 7,091,988 6,959,024 Investment in BOLI 3 219,064 219,064 209,601 209,601 Accrued interest receivable 3 33,931 33,931 27,847 27,847 Other interest-earning assets 3 1,056 1,056 1,982 1,982 Liabilities: Deposits 2 $ 9,106,104 $ 9,104,564 $ 8,097,738 $ 8,093,640 Borrowed funds 2 639,539 639,539 165,096 165,096 Senior and subordinated debt 1 309,444 317,948 201,208 205,726 Accrued interest payable 2 4,856 4,856 2,175 2,175 Management uses various methodologies and assumptions to determine the estimated fair values of the financial instruments in the table above. The fair value estimates are made at a discrete point in time based on relevant market information and consider management's judgments regarding future expected economic conditions, loss experience, and specific risk characteristics of the financial instruments. Short-Term Financial Assets and Liabilities - For financial instruments with a shorter-term or with no stated maturity, prevailing market rates, and limited credit risk, the carrying amounts approximate fair value. Those financial instruments include cash and due from banks, interest-bearing deposits in other banks, accrued interest receivable, and accrued interest payable. Securities Held-to-Maturity - The fair value of securities held-to-maturity is estimated using the present value of expected future cash flows of the remaining maturities of the securities. FHLB and FRB Stock - The carrying amounts approximate fair value as the stock is non-marketable. Loans - Loans includes the FDIC indemnification asset and net loans, which consists of loans held-for-investment, acquired loans, covered loans, and the allowance for loan losses. The fair value of loans is estimated using the present value of the expected future cash flows of the remaining maturities of the loans. Prepayment assumptions that consider the Company's historical experience and current economic and lending conditions were included. The discount rate was based on the LIBOR yield curve with adjustments for liquidity and credit risk inherent in the loans. The fair value of the covered loan portfolio is determined by discounting the expected future cash flows at a market interest rate, which is derived from LIBOR swap rates over the life of those loans. The expected future cash flows are derived from the contractual terms of the covered loans, net of any projected credit losses. For valuation purposes, these loans are placed into groups with similar characteristics and risk factors, where appropriate. The timing and amount of credit losses for each group are estimated using historical default and loss experience, current collateral valuations, borrower credit scores, and internal risk ratings. For individually significant loans or credit relationships, the estimated fair value is determined by a specific loan level review utilizing appraised values for collateral and projections of the timing and amount of expected future cash flows. Investment in BOLI - The fair value of BOLI approximates the carrying amount as both are based on each policy's respective cash surrender value ("CSV"), which is the amount the Company would receive from the liquidation of these investments. The CSV is derived from monthly reports provided by the managing brokers and is determined using the Company 's initial insurance premium and earnings of the underlying assets, offset by management fees. Other Interest-Earning Assets - The fair value of other interest-earning assets is estimated using the present value of the expected future cash flows of the remaining maturities of the assets. Deposits - The fair values disclosed for demand deposits, savings deposits, NOW accounts, and money market deposits are equal to the amount payable on demand at the reporting date (i.e., their carrying amounts). The fair value for fixed-rate time deposits was estimated using the expected future cash flows discounted based on the LIBOR yield curve, plus or minus the spread associated with current pricing. Borrowed Funds - The fair value of FHLB advances is estimated by discounting the agreements based on maturities using the rates currently offered for FHLB advances of similar remaining maturities adjusted for prepayment penalties that would be incurred if the borrowings were paid off on the measurement date. The carrying amounts of securities sold under agreements to repurchase approximate their fair value due to their short-term nature. Senior and Subordinated Debt - The fair value of senior and subordinated debt is determined using quoted market prices. Commitments to Extend Credit and Letters of Credit - The Company estimated the fair value of lending commitments outstanding to be immaterial based on (i) the limited interest rate exposure of the commitments outstanding due to their variable nature, (ii) the short-term nature of the commitment periods, (iii) termination clauses provided in the agreements, and (iv) the market rate of fees charged.

Summary of Significant Accoun23

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2016
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation – The accompanying unaudited condensed consolidated interim financial statements ("consolidated financial statements") of First Midwest Bancorp, Inc. (the " Company "), a Delaware corporation, were prepared in accordance with the rules and regulations of the Securities and Exchange Commission (" SEC ") for quarterly reports on Form 10-Q and reflect all adjustments that management deems necessary for the fair presentation of the financial position and results of operations for the periods presented. The results of operations for the quarter and nine months ended September 30, 2016 are not necessarily indicative of the results that may be expected for the year ending December 31, 2016 . The accounting and reporting policies of the Company and its subsidiaries conform to U.S. generally accepted accounting principles (" GAAP ") and general practices within the banking industry. The accompanying consolidated financial statements do not include certain information and note disclosures required by GAAP for complete annual financial statements. Therefore, these financial statements should be read in conjunction with the Company 's 2015 Annual Report on Form 10-K (" 2015 10-K"). The Company uses the accrual basis of accounting for financial reporting purposes.
Reclassification	Certain reclassifications were made to prior year amounts to conform to the current year presentation.
Use of Estimates	Use of Estimates – The preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Although these estimates and assumptions are based on the best available information, actual results could differ from those estimates.
Principles of Consolidation	Principles of Consolidation – The accompanying consolidated financial statements include the financial position and results of operations of the Company and its subsidiaries after elimination of all significant intercompany accounts and transactions. Assets held in a fiduciary or agency capacity are not assets of the Company or its subsidiaries and are not included in the consolidated financial statements.
Business Combinations	Business Combinations – Business combinations are accounted for under the acquisition method of accounting. Assets acquired and liabilities assumed are recorded at their estimated fair values as of the date of acquisition, with any excess of the purchase price of the acquisition over the fair value of the identifiable net tangible and intangible assets acquired recorded as goodwill. Alternatively, a gain is recorded if the fair value of assets purchased exceeds the fair value of liabilities assumed and consideration paid. The results of operations of the acquired business are included in the Condensed Consolidated Statements of Income from the effective date of the acquisition.
Loans	Loans – Loans held-for-investment are loans that the Company intends to hold until they are paid in full and are carried at the principal amount outstanding, including certain net deferred loan origination fees. Loan origination fees, commitment fees, and certain direct loan origination costs are deferred, and the net amount is amortized as a yield adjustment over the contractual life of the related loans or commitments and included in interest income. Fees related to letters of credit are amortized into fee income over the contractual life of the commitment. Other credit-related fees are recognized as fee income when earned. The Company 's net investment in direct financing leases is included in loans and consists of future minimum lease payments and estimated residual values, net of unearned income. Interest income on loans is accrued based on principal amounts outstanding. Loans held-for-sale are carried at the lower of aggregate cost or fair value and included in other assets in the Consolidated Statements of Financial Condition.
Acquired and Covered Loans	Acquired and Covered Loans – Covered loans consists of loans acquired by the Company in Federal Deposit Insurance Corporation (" FDIC ")-assisted transactions, which are covered by loss share agreements with the FDIC (the " FDIC Agreements "), under which the FDIC reimburses the Company for the majority of the losses and eligible expenses related to these assets during the coverage period. Acquired loans consist of all other loans that were acquired in business combinations that are not covered by the FDIC Agreements. Covered loans and acquired loans are included within loans held-for-investment. Acquired and covered loans are separated into (i) non-purchased credit impaired (" Non-PCI ") and (ii) purchased credit impaired (" PCI ") loans. Non-PCI loans include loans that did not have evidence of credit deterioration since origination at the acquisition date. PCI loans include loans that had evidence of credit deterioration since origination and for which it was probable at acquisition that the Company would not collect all contractually required principal and interest payments. Evidence of credit deterioration was evaluated using various indicators, such as past due and non-accrual status. Leases and revolving loans do not qualify to be accounted for as PCI loans and are accounted for as Non-PCI loans. The acquisition adjustment related to Non-PCI loans is amortized into interest income over the contractual life of the related loans. If an acquired Non-PCI loan is renewed subsequent to the acquisition date, any remaining acquisition adjustment is accreted into interest income and the loan is considered a new loan that is no longer classified as an acquired loan. PCI loans are accounted for based on estimates of expected future cash flows. To estimate the fair value, the Company generally aggregates purchased consumer loans and certain smaller balance commercial loans into pools of loans with common risk characteristics, such as delinquency status, credit score, and internal risk ratings. The fair values of larger balance commercial loans are estimated on an individual basis. Expected future cash flows in excess of the fair value of loans at the purchase date ("accretable yield") are recorded as interest income over the life of the loans if the timing and amount of the expected future cash flows can be reasonably estimated. The non-accretable yield represents the difference between contractually required payments and the expected future cash flows determined at acquisition. Subsequent increases in expected future cash flows are offset against the allowance for credit losses to the extent an allowance has been established or otherwise recognized as interest income prospectively. The present value of any decreases in expected future cash flows is recognized by recording a charge-off through the allowance for loan losses or providing an allowance for loan losses.
90-Days Past Due Loans	90-Days Past Due Loans –The Company 's accrual of interest on loans is discontinued at the time the loan is 90 days past due unless the credit is sufficiently collateralized and in the process of renewal or collection.
Non-accrual Loans	Non-accrual Loans – Generally, corporate loans are placed on non-accrual status (i) when either principal or interest payments become 90 days or more past due unless the credit is sufficiently collateralized and in the process of renewal or collection, or (ii) when an individual analysis of a borrower's creditworthiness warrants a downgrade to non-accrual regardless of past due status. When a loan is placed on non-accrual status, unpaid interest credited to income in the current year is reversed, and unpaid interest accrued in prior years is charged against the allowance for loan losses. After the loan is placed on non-accrual status, all debt service payments are applied to the principal on the loan. Future interest income may only be recorded on a cash basis after recovery of principal is reasonably assured. Non-accrual loans are returned to accrual status when the financial position of the borrower and other relevant factors indicate that the Company will collect all principal and interest. Commercial loans and loans secured by real estate are charged-off when deemed uncollectible. A loss is recorded if the net realizable value of the underlying collateral is less than the outstanding principal and interest. Consumer loans that are not secured by real estate are subject to mandatory charge-off at a specified delinquency date and are usually not classified as non-accrual prior to being charged-off. Closed-end consumer loans, which include installment, automobile, and single payment loans, are usually charged-off no later than the end of the month in which the loan becomes 120 days past due. PCI loans are generally considered accruing loans unless reasonable estimates of the timing and amount of expected future cash flows cannot be determined. Loans without reasonable future cash flow estimates are classified as non-accrual loans, and interest income is not recognized on those loans until the timing and amount of the expected future cash flows can be reasonably determined.
Troubled Debt Restructurings (“TDRs”)	Troubled Debt Restructurings ( " TDR s" ) – A restructuring is considered a TDR when (i) the borrower is experiencing financial difficulties, and (ii) the creditor grants a concession, such as forgiveness of principal, reduction of the interest rate, changes in payments, or extension of the maturity date. Loans are not classified as TDR s when the modification is short-term or results in an insignificant delay in payments. The Company 's TDR s are determined on a case-by-case basis. The Company does not accrue interest on a TDR unless it believes collection of all principal and interest under the modified terms is reasonably assured. For a TDR to begin accruing interest, the borrower must demonstrate some level of past performance and the future capacity to perform under the modified terms. Generally, six months of consecutive payment performance under the restructured terms is required before a TDR is returned to accrual status. However, the period could vary depending on the individual facts and circumstances of the loan. An evaluation of the borrower's current creditworthiness is used to assess the borrower's capacity to repay the loan under the modified terms. This evaluation includes an estimate of expected future cash flows, evidence of strong financial position, and estimates of the value of collateral, if applicable. For TDR s to be removed from TDR status in the calendar year after the restructuring, the loans must (i) have an interest rate and terms that reflect market conditions at the time of restructuring, and (ii) be in compliance with the modified terms. If the loan was restructured at below market rates and terms, it continues to be separately reported as restructured until it is paid in full or charged-off.
Impaired Loans	Impaired Loans – Impaired loans consist of corporate non-accrual loans and TDR s. A loan is considered impaired when it is probable that the Company will not collect all contractual principal and interest. With the exception of accruing TDR s, impaired loans are classified as non-accrual and are exclusive of smaller homogeneous loans, such as home equity, 1-4 family mortgages, and installment loans. Impaired loans with balances under a specified threshold are not individually evaluated for impairment. For all other impaired loans, impairment is measured by comparing the estimated value of the loan to the recorded book value. The value of collateral-dependent loans is based on the fair value of the underlying collateral, less costs to sell. The value of other loans is measured using the present value of expected future cash flows discounted at the loan's initial effective interest rate.
Allowance for Credit Losses	Allowance for Credit Losses – The allowance for credit losses is comprised of the allowance for loan losses and the reserve for unfunded commitments, and is maintained by management at a level believed adequate to absorb estimated losses inherent in the existing loan portfolio. Determination of the allowance for credit losses is subjective since it requires significant estimates and management judgment, including the amounts and timing of expected future cash flows on impaired loans, estimated losses on pools of homogeneous loans, consideration of current economic trends, and other factors. Loans deemed to be uncollectible are charged-off against the allowance for loan losses, while recoveries of amounts previously charged-off are credited to the allowance for loan losses. Additions to the allowance for loan losses are charged to expense through the provision for loan losses. The amount of provision depends on a number of factors, including net charge-off levels, loan growth, changes in the composition of the loan portfolio, and the Company 's assessment of the allowance for loan losses based on the methodology discussed below. Allowance for Loan Losses – The allowance for loan losses consists of (i) specific reserves for individual loans where the recorded investment exceeds the value, (ii) an allowance based on a loss migration analysis that uses historical credit loss experience for each loan category, and (iii) an allowance based on other internal and external qualitative factors. The specific reserves component of the allowance for loan losses is based on a periodic analysis of impaired loans exceeding a fixed dollar amount. If the value of an impaired loan is less than the recorded book value, the Company either establishes a valuation allowance (i.e., a specific reserve) equal to the excess of the book value over the value of the loan as a component of the allowance for loan losses or charges off the amount if it is a confirmed loss. The general reserve component is based on a loss migration analysis, which examines actual loss experience by loan category for a rolling 8-quarter period and the related internal risk rating for corporate loans. The loss migration analysis is updated quarterly primarily using actual loss experience. This component is then adjusted based on management's consideration of many internal and external qualitative factors, including: • Changes in the composition of the loan portfolio, trends in the volume of loans, and trends in delinquent and non-accrual loans that could indicate that historical trends do not reflect current conditions. • Changes in credit policies and procedures, such as underwriting standards and collection, charge-off, and recovery practices. • Changes in the experience, ability, and depth of credit management and other relevant staff. • Changes in the quality of the Company 's loan review system and Board of Directors oversight. • The effect of any concentration of credit and changes in the level of concentrations, such as loan type or risk rating. • Changes in the value of the underlying collateral for collateral-dependent loans. • Changes in the national and local economy that affect the collectability of various segments of the portfolio. • The effect of other external factors, such as competition and legal and regulatory requirements, on the Company 's loan portfolio. The allowance for loan losses also consists of an allowance on acquired and covered Non-PCI and PCI loans. No allowance for loan losses is recorded on acquired loans at the acquisition date. Subsequent to the acquisition date, an allowance for credit losses is established as necessary to reflect credit deterioration. The acquired Non-PCI allowance is based on management's evaluation of the acquired Non-PCI loan portfolio giving consideration to the current portfolio balance including the remaining acquisition adjustments, maturity dates, and overall credit quality. The allowance for covered Non-PCI loans is calculated in the same manner as the general reserve component based on a loss migration analysis as discussed above. The acquired and covered PCI allowance reflects the difference between the carrying value and the discounted expected future cash flows of the acquired and covered PCI loans. On a periodic basis, the adequacy of this allowance is determined through a re-estimation of expected future cash flows on all of the outstanding acquired and covered PCI loans using either a probability of default/loss given default (" PD/LGD ") methodology or a specific review methodology. The PD/LGD model is a loss model that estimates expected future cash flows using a probability of default curve and loss given default estimates. Acquired Non-PCI loans that have renewed subsequent to the respective acquisition dates are no longer classified as acquired loans. Instead, they are included in the general loan population and allocated an allowance based on a loss migration analysis. Reserve for Unfunded Commitments – The Company also maintains a reserve for unfunded commitments, including letters of credit, for the risk of loss inherent in these arrangements. The reserve for unfunded commitments is estimated using the loss migration analysis from the allowance for loan losses, adjusted for probabilities of future funding requirements. The reserve for unfunded commitments is included in other liabilities in the Consolidated Statements of Financial Condition. The establishment of the allowance for credit losses involves a high degree of judgment given the difficulty of assessing the factors impacting loan repayment and estimating the timing and amount of losses. While management utilizes its best judgment and information available, the adequacy of the allowance for credit losses depends on a variety of factors beyond the Company 's control, including the performance of its loan portfolio, the economy, changes in interest rates and property values, and the interpretation of loan risk classifications by regulatory authorities.
Derivative Financial Instruments	Derivative Financial Instruments – To provide derivative products to customers and in the ordinary course of business, the Company enters into derivative transactions as part of its overall interest rate risk management strategy to minimize significant unplanned fluctuations in earnings and expected future cash flows caused by interest rate volatility. All derivative instruments are recorded at fair value as either other assets or other liabilities in the Consolidated Statements of Financial Condition. Subsequent changes in a derivative's fair value are recognized in earnings unless specific hedge accounting criteria are met. On the date the Company enters into a derivative contract, the derivative is designated as a fair value hedge, a cash flow hedge, or a non-hedge derivative instrument. Fair value hedges are designed to mitigate exposure to changes in the fair value of an asset or liability attributable to a particular risk, such as interest rate risk. Cash flow hedges are designed to mitigate exposure to variability in expected future cash flows to be received or paid related to an asset, liability, or other type of forecasted transaction. The Company formally documents all relationships between hedging instruments and hedged items, including its risk management objective and strategy at inception. At the hedge's inception and quarterly thereafter, a formal assessment is performed to determine the effectiveness of the derivative in offsetting changes in the fair values or expected future cash flows of the hedged items in the current period and prospectively. If a derivative instrument designated as a hedge is terminated or ceases to be highly effective, hedge accounting is discontinued prospectively, and the gain or loss is amortized into earnings. For fair value hedges, the gain or loss is amortized over the remaining life of the hedged asset or liability. For cash flow hedges, the gain or loss is amortized over the same period that the forecasted hedged transactions impact earnings. If the hedged item is disposed of, any fair value adjustments are included in the gain or loss from the disposition of the hedged item. If the forecasted transaction is no longer probable, the gain or loss is included in earnings immediately. For fair value hedges, changes in the fair value of the derivative instruments, as well as changes in the fair value of the hedged item, are recognized in earnings. For cash flow hedges, the effective portion of the change in fair value of the derivative instrument is reported as a component of accumulated other comprehensive loss and is reclassified to earnings when the hedged transaction is reflected in earnings. Ineffectiveness is calculated based on the change in fair value of the hedged item compared with the change in fair value of the hedging instrument. For all types of hedges, any ineffectiveness in the hedging relationship is recognized in earnings during the period the ineffectiveness occurs.
Recent Accounting Pronouncements	Adopted Accounting Pronouncements Amendments to Consolidation Analysis: In February 2015, the Financial Accounting Standards Board (" FASB ") issued guidance that updates current accounting for the consolidation of certain legal entities. This guidance modifies the evaluation of whether limited partnerships and similar legal entities are variable interest entities ("VIEs") or voting interest entities, eliminates the presumption that a general partner should consolidate a limited partnership, affects the consolidation analysis of reporting entities that are involved with VIEs, and provides certain exceptions from consolidation guidance for certain reporting entities. This guidance is effective for annual and interim periods beginning after December 15, 2015. The adoption of this guidance on January 1, 2016 did not materially impact the Company 's financial condition, results of operations, or liquidity. Simplifying the Presentation of Debt Issuance Costs: In April of 2015, the FASB issued guidance to clarify the presentation of debt issuance costs within the balance sheet. Additionally, the guidance requires debt issuance costs related to a recognized debt liability to be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The recognition and measurement guidance for debt issuance costs are not affected by this amendment. The guidance is effective for annual and interim periods beginning after December 15, 2015. The adoption of this guidance on January 1, 2016 did not materially impact the Company 's financial condition, results of operations, or liquidity. Accounting Pronouncements Pending Adoption Revenue from Contracts with Customers: In May of 2014, the FASB issued guidance that requires an entity to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In March of 2016, the FASB issued an amendment to this guidance to clarify the implementation of guidance on principal versus agent consideration. Additional amendments to clarify the implementation guidance on the identification of performance obligations and licensing were issued in April of 2016 and narrow-scope improvements and practical expedients were issued in May of 2016. The guidance was initially effective for annual and interim reporting periods beginning on or after December 15, 2016. In August of 2015, the FASB issued guidance that defers the effective date by one year. The deferral causes the guidance to be effective for annual and interim reporting periods beginning on or after December 15, 2017, and must be applied either retrospectively or using the modified retrospective approach. Early adoption is permitted, but not before the original effective date. Management is evaluating the new guidance and the impact to the Company 's financial condition, results of operations, and liquidity. Disclosure of Uncertainties about an Entity's Ability to Continue as a Going Concern: In August of 2014, the FASB issued guidance that requires management to evaluate whether there are conditions or events, considered in the aggregate, that raise substantial doubt about the entity's ability to continue as a going concern within one year after the date that the financial statements are issued. The guidance is effective for annual and interim periods beginning after December 15, 2016. Early adoption is permitted. Management does not expect the adoption of this guidance will materially impact the Company 's financial condition, results of operations, or liquidity. Amendments to Guidance on Classifying and Measuring Financial Instruments: In January of 2016, the FASB issued guidance that will require entities to measure equity investments that do not result in consolidation and are not accounted for under the equity method at fair value. Any changes in fair value will be recognized in net income unless the investments qualify for a new practicability exception. This guidance also requires entities to recognize changes in instrument-specific credit risk related to financial liabilities measured under the fair value option in other comprehensive income. No changes were made to the guidance for classifying and measuring investments in debt securities and loans. This guidance is effective for annual and interim periods beginning after December 15, 2017. Early adoption is permitted. Management does not expect the adoption of this guidance will materially impact the Company 's financial condition, results of operations, or liquidity. Leases: In February of 2016, the FASB issued guidance to increase transparency and comparability across entities for leasing arrangements. This guidance requires lessees to recognize assets and liabilities for most leases. For lessors, this guidance modifies the lease classification criteria and the accounting for sales-type and direct financing leases. In addition, this guidance clarifies criteria for the determination of whether a contract is or contains a lease. This guidance is effective for annual and interim periods beginning after December 15, 2018. Early adoption is permitted. During the third quarter of 2016, the Company entered into a sale-leaseback transaction that resulted in a deferred gain of $82.5 million . Upon adoption of this guidance, the remaining deferred gain will be recognized immediately as a cumulative-effect adjustment to equity. For additional discussion of the sale-leaseback transaction, see note 8 " Premises, Furniture, and Equipment ." Management is evaluating the new guidance and the additional impact to the Company 's financial condition, results of operations, or liquidity. Contingent Put and Call Options in Debt Instruments: In March of 2016, the FASB issued final guidance clarifying the requirements for assessing whether contingent call (put) options that can accelerate the payment of principal on debt instruments are clearly and closely related to their debt hosts. Entities are required to apply the guidance to existing debt instruments (or hybrid financial instruments that are determined to have a debt host) using a modified retrospective transition method as of the period of adoption. This guidance is effective for annual and interim periods beginning after December 15, 2016. Early adoption is permitted. Management does not expect the adoption of this guidance will materially impact the Company 's financial condition, results of operations, or liquidity. Equity Method Accounting: In March of 2016, the FASB issued final guidance to simplify the equity method of accounting. The guidance eliminates the requirement to retrospectively apply equity method accounting in previous periods when an investor initially obtains significant influence over an investee. This guidance is effective for annual and interim periods beginning after December 15, 2016. Early adoption is permitted. Management does not expect the adoption of this guidance will materially impact the Company 's financial condition, results of operations, or liquidity. Accounting for Employee Share-based Payments: In March of 2016, the FASB issued guidance to simplify the accounting for employee share-based payment transactions. The guidance requires entities to recognize the income tax effects of awards in the income statement when the awards vest or are settled. In addition, the guidance allows entities to repurchase more of an employee's shares than it can under current guidance for tax withholding purposes without triggering liability accounting and to make a policy election to account for forfeitures as they occur. This guidance is effective for annual and interim reporting periods beginning on or after December 15, 2016. Early adoption is permitted. Management is evaluating the new guidance, but does not expect the adoption of this guidance will materially impact the Company's financial condition, results of operations, or liquidity. Measurement of Credit Losses on Financial Instruments: In June of 2016, the FASB issued guidance that will require entities to present financial assets measured at amortized cost at the net amount expected to be collected, considering an entity's current estimate of all expected credit losses. In addition, credit losses relating to available-for-sale debt securities will be required to be recorded through an allowance for credit losses, with changes in credit loss estimates recognized through current earnings. This guidance is effective for annual and interim periods beginning after December 15, 2019. Early adoption is permitted, but not for periods beginning before December 15, 2018. Management is evaluating the new guidance and the impact to the Company 's financial condition, results of operations, and liquidity. Classification of Certain Cash Receipts and Cash Payments: In August of 2016, the FASB issued guidance clarifying certain cash flow presentation and classification issues to reduce diversity in practice. This guidance is effective for annual and interim reporting periods beginning on or after December 15, 2017. Early adoption is permitted. Management does not expect the adoption of this guidance will materially impact the Company 's Consolidated Statement of Cash Flows.

Acquisitions (Tables)

Acquisitions (Tables)	9 Months Ended
	Sep. 30, 2016
Business Combinations [Abstract]
Acquisition activity	The following table presents the assets acquired and liabilities assumed, net of the fair value adjustments, in the NI Bancshares and Peoples transactions as of the acquisition date. The assets acquired and liabilities assumed, both intangible and tangible, were recorded at their estimated fair values as of the acquisition date and have been accounted for under the acquisition method of accounting. Acquisition Activity (Amounts in thousands, except share and per share data) NI Bancshares Peoples March 8, 2016 December 3, 2015 Assets Cash and due from banks and interest-bearing deposits in other banks $ 72,533 $ 781 Securities available-for-sale 125,843 41,492 Securities held-to-maturity 1,864 — FHLB and FRB stock 1,549 558 Loans 397,018 53,917 OREO 2,863 515 Investment in BOLI 8,384 — Goodwill 20,762 7,544 Other intangible assets 10,925 580 Premises, furniture, and equipment 20,019 2,215 Accrued interest receivable and other assets 16,004 2,911 Total assets $ 677,764 $ 110,513 Liabilities Noninterest-bearing deposits $ 130,909 $ 15,869 Interest-bearing deposits 464,012 75,944 Total deposits 594,921 91,813 Borrowed funds 2,416 1,200 Intangible liabilities 230 — Accrued interest payable and other liabilities 10,115 672 Total liabilities 607,682 93,685 Consideration Paid Common stock (2016 - 3,042,494 shares issued at $18.059 per share), net of $48,000 in issuance costs 54,896 — Cash paid 15,186 16,828 Total consideration paid 70,082 16,828 $ 677,764 $ 110,513

Securities (Tables)

Securities (Tables)	9 Months Ended
	Sep. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Securities Available-for-Sale	A summary of the Company's securities portfolio by category and maturity is presented in the following tables. Securities Portfolio (Dollar amounts in thousands) As of September 30, 2016 As of December 31, 2015 Amortized Cost Gross Unrealized Fair Value Amortized Cost Gross Unrealized Fair Value Gains Losses Gains Losses Securities Available-for-Sale U.S. treasury securities $ 43,593 $ 212 $ (8 ) $ 43,797 $ 17,000 $ 15 $ (35 ) $ 16,980 U.S. agency securities 190,821 2,159 (49 ) 192,931 86,461 351 (169 ) 86,643 Collateralized mortgage obligations ("CMOs") 1,074,736 8,759 (2,236 ) 1,081,259 695,198 1,072 (9,085 ) 687,185 Other mortgage-backed securities ("MBSs") 319,964 4,641 (121 ) 324,484 152,481 1,920 (871 ) 153,530 Municipal securities 280,884 5,959 (130 ) 286,713 321,437 6,443 (310 ) 327,570 Trust-preferred collateralized debt obligations ("CDOs") 47,893 73 (16,067 ) 31,899 48,287 34 (16,792 ) 31,529 Equity securities 3,075 110 (238 ) 2,947 3,282 86 (169 ) 3,199 Total securities available-for-sale $ 1,960,966 $ 21,913 $ (18,849 ) $ 1,964,030 $ 1,324,146 $ 9,921 $ (27,431 ) $ 1,306,636 Securities Held-to-Maturity Municipal securities $ 20,337 $ — $ (2,227 ) $ 18,110 $ 23,152 $ — $ (3,098 ) $ 20,054 Trading Securities $ 18,351 $ 16,894
Securities Held-to-Maturity	A summary of the Company's securities portfolio by category and maturity is presented in the following tables. Securities Portfolio (Dollar amounts in thousands) As of September 30, 2016 As of December 31, 2015 Amortized Cost Gross Unrealized Fair Value Amortized Cost Gross Unrealized Fair Value Gains Losses Gains Losses Securities Available-for-Sale U.S. treasury securities $ 43,593 $ 212 $ (8 ) $ 43,797 $ 17,000 $ 15 $ (35 ) $ 16,980 U.S. agency securities 190,821 2,159 (49 ) 192,931 86,461 351 (169 ) 86,643 Collateralized mortgage obligations ("CMOs") 1,074,736 8,759 (2,236 ) 1,081,259 695,198 1,072 (9,085 ) 687,185 Other mortgage-backed securities ("MBSs") 319,964 4,641 (121 ) 324,484 152,481 1,920 (871 ) 153,530 Municipal securities 280,884 5,959 (130 ) 286,713 321,437 6,443 (310 ) 327,570 Trust-preferred collateralized debt obligations ("CDOs") 47,893 73 (16,067 ) 31,899 48,287 34 (16,792 ) 31,529 Equity securities 3,075 110 (238 ) 2,947 3,282 86 (169 ) 3,199 Total securities available-for-sale $ 1,960,966 $ 21,913 $ (18,849 ) $ 1,964,030 $ 1,324,146 $ 9,921 $ (27,431 ) $ 1,306,636 Securities Held-to-Maturity Municipal securities $ 20,337 $ — $ (2,227 ) $ 18,110 $ 23,152 $ — $ (3,098 ) $ 20,054 Trading Securities $ 18,351 $ 16,894
Trading Securities	A summary of the Company's securities portfolio by category and maturity is presented in the following tables. Securities Portfolio (Dollar amounts in thousands) As of September 30, 2016 As of December 31, 2015 Amortized Cost Gross Unrealized Fair Value Amortized Cost Gross Unrealized Fair Value Gains Losses Gains Losses Securities Available-for-Sale U.S. treasury securities $ 43,593 $ 212 $ (8 ) $ 43,797 $ 17,000 $ 15 $ (35 ) $ 16,980 U.S. agency securities 190,821 2,159 (49 ) 192,931 86,461 351 (169 ) 86,643 Collateralized mortgage obligations ("CMOs") 1,074,736 8,759 (2,236 ) 1,081,259 695,198 1,072 (9,085 ) 687,185 Other mortgage-backed securities ("MBSs") 319,964 4,641 (121 ) 324,484 152,481 1,920 (871 ) 153,530 Municipal securities 280,884 5,959 (130 ) 286,713 321,437 6,443 (310 ) 327,570 Trust-preferred collateralized debt obligations ("CDOs") 47,893 73 (16,067 ) 31,899 48,287 34 (16,792 ) 31,529 Equity securities 3,075 110 (238 ) 2,947 3,282 86 (169 ) 3,199 Total securities available-for-sale $ 1,960,966 $ 21,913 $ (18,849 ) $ 1,964,030 $ 1,324,146 $ 9,921 $ (27,431 ) $ 1,306,636 Securities Held-to-Maturity Municipal securities $ 20,337 $ — $ (2,227 ) $ 18,110 $ 23,152 $ — $ (3,098 ) $ 20,054 Trading Securities $ 18,351 $ 16,894
Remaining Contractual Maturity of Securities	Remaining Contractual Maturity of Securities (Dollar amounts in thousands) As of September 30, 2016 Available-for-Sale Held-to-Maturity Amortized Cost Fair Value Amortized Cost Fair Value One year or less $ 75,444 $ 74,392 $ 3,218 $ 2,866 After one year to five years 433,027 426,991 7,560 6,732 After five years to ten years 6,827 6,732 2,340 2,084 After ten years 47,893 47,225 7,219 6,428 Securities that do not have a single contractual maturity date 1,397,775 1,408,690 — — Total $ 1,960,966 $ 1,964,030 $ 20,337 $ 18,110
Securities Available-for-Sale Gains	The following table presents net realized gains on securities available-for-sale for the quarters and nine months ended September 30, 2016 and 2015 . Securities Available-for-Sale Gains (Dollar amounts in thousands) Quarters Ended Nine Months Ended 2016 2015 2016 2015 Gains on sales of securities: Gross realized gains $ 187 $ 524 $ 1,266 $ 1,689 Gross realized losses — — (169 ) (138 ) Net realized gains on sales of securities 187 524 1,097 1,551 Non-cash impairment charges: Other-than-temporary securities impairment ("OTTI") — — — — Net realized gains $ 187 $ 524 $ 1,097 $ 1,551
OTTI Recognized in Earnings	The following table presents a rollforward of life-to-date OTTI recognized in earnings related to all securities available-for-sale held by the Company for the quarters and nine months ended September 30, 2016 and 2015 . The majority of the beginning and ending balance of OTTI relates to CDOs currently held by the Company . Changes in OTTI Recognized in Earnings (Dollar amounts in thousands) Quarters Ended Nine Months Ended 2016 2015 2016 2015 Beginning balance $ 23,709 $ 23,709 $ 23,709 $ 23,880 OTTI included in earnings (1) : Reduction for sales of securities (2) — — — (171 ) Ending balance $ 23,709 $ 23,709 $ 23,709 $ 23,709 (1) Included in net securities gains in the Condensed Consolidated Statements of Income. (2) This reduction was driven by the sale of one CMO with a carrying value of $1.3 million during the nine months ended September 30, 2015.
Securities in an Unrealized Loss Position	The following table presents the aggregate amount of unrealized losses and the aggregate related fair values of securities with unrealized losses as of September 30, 2016 and December 31, 2015 . Securities in an Unrealized Loss Position (Dollar amounts in thousands) Less Than 12 Months 12 Months or Longer Total Number of Securities Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses As of September 30, 2016 Securities Available-for-Sale U.S. treasury securities 5 $ 10,049 $ 7 $ 1,999 $ 1 $ 12,048 $ 8 U.S. agency securities 12 23,394 49 — — 23,394 49 CMOs 64 180,572 717 119,934 1,519 300,506 2,236 MBSs 15 45,686 89 6,573 32 52,259 121 Municipal securities 49 18,615 112 2,307 18 20,922 130 CDOs 9 1,218 9 29,398 16,058 30,616 16,067 Equity securities 2 379 226 2,379 12 2,758 238 Total 156 $ 279,913 $ 1,209 $ 162,590 $ 17,640 $ 442,503 $ 18,849 Securities Held-to-Maturity Municipal securities 16 $ 18,110 $ 2,227 $ — $ — $ 18,110 $ 2,227 As of December 31, 2015 Securities Available-for-Sale U.S. treasury securities 4 $ 7,946 $ 35 $ — $ — $ 7,946 $ 35 U.S. agency securities 10 30,620 169 — — 30,620 169 CMOs 133 309,787 3,110 257,362 5,975 567,149 9,085 MBSs 27 63,028 427 31,980 444 95,008 871 Municipal securities 68 8,135 65 24,227 245 32,362 310 CDOs 8 8,034 971 21,642 15,821 29,676 16,792 Equity securities 2 485 120 2,305 49 2,790 169 Total 252 $ 428,035 $ 4,897 $ 337,516 $ 22,534 $ 765,551 $ 27,431 Securities Held-to-Maturity Municipal securities 19 $ 20,054 $ 3,098 $ — $ — $ 20,054 $ 3,098

Loans (Tables)

Loans (Tables)	9 Months Ended
	Sep. 30, 2016
Loans and Leases Receivable Disclosure [Abstract]
Composition Of Loan Portfolio	The following table presents the Company 's loans held-for-investment by class. Loan Portfolio (Dollar amounts in thousands) As of September 30, December 31, Commercial and industrial $ 2,849,399 $ 2,524,726 Agricultural 409,571 387,440 Commercial real estate: Office, retail, and industrial 1,537,038 1,395,454 Multi-family 625,305 528,324 Construction 401,857 216,882 Other commercial real estate 970,855 931,190 Total commercial real estate 3,535,055 3,071,850 Total corporate loans 6,794,025 5,984,016 Home equity 733,260 653,468 1-4 family mortgages 388,145 355,854 Installment 232,030 137,602 Total consumer loans 1,353,435 1,146,924 Covered loans 24,322 30,775 Total loans $ 8,171,782 $ 7,161,715 Deferred loan fees included in total loans $ 4,034 $ 5,191 Overdrawn demand deposits included in total loans 3,428 2,810
Schedule Of Loans Sold	The following table presents loan sales for the quarters and nine months ended September 30, 2016 and 2015 . Loan Sales (Dollar amounts in thousands) Quarters Ended Nine Months Ended 2016 2015 2016 2015 Corporate loan sales Proceeds from sales $ 12,223 $ 10,226 $ 36,082 $ 19,649 Less book value of loans sold 11,828 9,771 34,718 18,780 Net gains on corporate loan sales (1) 395 455 1,364 869 1-4 family mortgage loan sales Proceeds from sales 110,167 43,340 202,932 132,367 Less book value of loans sold 107,255 42,189 198,024 128,634 Net gains on 1-4 family mortgage loan sales (2) 2,912 1,151 4,908 3,733 Total net gains on loan sales $ 3,307 $ 1,606 $ 6,272 $ 4,602 (1) Net gains on corporate loan sales are included in other service charges, commissions, and fees in the Condensed Consolidated Statements of Income. (2) Net gains on 1-4 family mortgage loan sales are included in mortgage banking income in the Condensed Consolidated Statements of Income.

Acquired and Covered Loans (Tab

Acquired and Covered Loans (Tables)	9 Months Ended
	Sep. 30, 2016
Acquired Loans [Abstract]
Acquired Loans	The following table presents acquired and covered PCI and Non-PCI loans as of September 30, 2016 and December 31, 2015 . Acquired and Covered Loans (Dollar amounts in thousands) As of September 30, 2016 As of December 31, 2015 PCI Non-PCI Total PCI Non-PCI Total Acquired loans $ 57,777 $ 686,427 $ 744,204 $ 50,286 $ 534,506 $ 584,792 Covered loans 8,228 16,094 24,322 9,919 20,856 30,775 Total acquired and covered loans $ 66,005 $ 702,521 $ 768,526 $ 60,205 $ 555,362 $ 615,567
FDIC Indemnification Asset Roll Forward	Rollforwards of the carrying value of the FDIC indemnification asset for the quarters and nine months ended September 30, 2016 and 2015 are presented in the following table. Changes in the FDIC Indemnification Asset (Dollar amounts in thousands) Quarters Ended Nine Months Ended 2016 2015 2016 2015 Beginning balance $ 5,171 $ 7,335 $ 3,903 $ 8,452 Amortization (302 ) (321 ) (884 ) (1,174 ) Change in expected reimbursements from the FDIC for changes in expected credit losses (228 ) 487 (487 ) 2,207 Net payments to (from) the FDIC 191 (1,395 ) 2,300 (3,379 ) Ending balance $ 4,832 $ 6,106 $ 4,832 $ 6,106
Schedule Of Changes In Accretable Yield For Purchased Credit Impaired Loans	Changes in the accretable yield for acquired and covered PCI loans were as follows. Changes in Accretable Yield (Dollar amounts in thousands) Quarters Ended Nine Months Ended 2016 2015 2016 2015 Beginning balances $ 25,082 $ 20,658 $ 24,912 $ 28,244 Additions — — 3,981 — Accretion (2,763 ) (2,366 ) (6,612 ) (9,364 ) Other (1) (1,012 ) 336 (974 ) (252 ) Ending balance $ 21,307 $ 18,628 $ 21,307 $ 18,628 (1) Decreases result from the resolution of certain loans occurring earlier than anticipated while increases represent a rise in the expected future cash flows to be collected over the remaining estimated life of the underlying portfolio.

Past Due Loans, Allowance For28

Past Due Loans, Allowance For Credit Losses, Impaired Loans, and TDRS (Tables)	9 Months Ended
	Sep. 30, 2016
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Past Due Financing Receivables	The following table presents an aging analysis of the Company 's past due loans as of September 30, 2016 and December 31, 2015 . The aging is determined without regard to accrual status. The table also presents non-performing loans, consisting of non-accrual loans (the majority of which are past due) and loans 90 days or more past due and still accruing interest, as of each balance sheet date. Aging Analysis of Past Due Loans and Non-performing Loans by Class (Dollar amounts in thousands) Aging Analysis (Accruing and Non-accrual) Non-performing Loans Current 30-89 Days Past Due 90 Days or More Past Due Total Past Due Total Loans Non- accrual 90 Days or More Past Due, Still Accruing Interest As of September 30, 2016 Commercial and industrial $ 2,833,642 $ 9,099 $ 6,658 $ 15,757 $ 2,849,399 $ 13,823 $ 2,154 Agricultural 406,947 2,460 164 2,624 409,571 184 — Commercial real estate: Office, retail, and industrial 1,516,820 5,816 14,402 20,218 1,537,038 17,670 82 Multi-family 623,386 1,321 598 1,919 625,305 316 454 Construction 400,809 767 281 1,048 401,857 287 — Other commercial real estate 964,135 3,254 3,466 6,720 970,855 3,361 932 Total commercial real estate 3,505,150 11,158 18,747 29,905 3,535,055 21,634 1,468 Total corporate loans 6,745,739 22,717 25,569 48,286 6,794,025 35,641 3,622 Home equity 727,433 3,591 2,236 5,827 733,260 4,916 165 1-4 family mortgages 385,024 1,869 1,252 3,121 388,145 3,240 235 Installment 229,881 1,853 296 2,149 232,030 — 296 Total consumer loans 1,342,338 7,313 3,784 11,097 1,353,435 8,156 696 Covered loans 23,905 319 98 417 24,322 492 — Total loans $ 8,111,982 $ 30,349 $ 29,451 $ 59,800 $ 8,171,782 $ 44,289 $ 4,318 As of December 31, 2015 Commercial and industrial $ 2,516,197 $ 4,956 $ 3,573 $ 8,529 $ 2,524,726 $ 5,587 $ 857 Agricultural 387,109 245 86 331 387,440 355 — Commercial real estate: Office, retail, and industrial 1,386,383 2,647 6,424 9,071 1,395,454 6,875 4 Multi-family 526,625 541 1,158 1,699 528,324 796 548 Construction 216,377 — 505 505 216,882 905 — Other commercial real estate 922,531 3,575 5,084 8,659 931,190 5,611 661 Total commercial real estate 3,051,916 6,763 13,171 19,934 3,071,850 14,187 1,213 Total corporate loans 5,955,222 11,964 16,830 28,794 5,984,016 20,129 2,070 Home equity 647,175 3,247 3,046 6,293 653,468 5,310 216 1-4 family mortgages 350,980 2,680 2,194 4,874 355,854 3,416 528 Installment 136,780 753 69 822 137,602 20 69 Total consumer loans 1,134,935 6,680 5,309 11,989 1,146,924 8,746 813 Covered loans 29,808 405 562 967 30,775 555 174 Total loans $ 7,119,965 $ 19,049 $ 22,701 $ 41,750 $ 7,161,715 $ 29,430 $ 3,057
Allowance for Credit Losses on Financing Receivables	A rollforward of the allowance for credit losses by portfolio segment for the quarters and nine months ended September 30, 2016 and 2015 is presented in the table below. Allowance for Credit Losses by Portfolio Segment (Dollar amounts in thousands) Commercial, Industrial, and Agricultural Office, Retail, and Industrial Multi- family Construction Other Commercial Real Estate Consumer Covered Loans Reserve for Unfunded Commitments Total Allowance for Credit Losses Quarter ended September 30, 2016 Beginning balance $ 40,084 $ 12,985 $ 2,926 $ 2,239 $ 7,474 $ 13,003 $ 1,394 $ 1,400 $ 81,505 Charge-offs (1,760 ) (2,193 ) — — (509 ) (1,488 ) — — (5,950 ) Recoveries 615 42 69 9 94 326 — — 1,155 Net charge-offs (1,145 ) (2,151 ) 69 9 (415 ) (1,162 ) — — (4,795 ) Provision for loan losses and other 3,579 3,019 1,048 916 1,488 50 (102 ) (400 ) 9,598 Ending balance $ 42,518 $ 13,853 $ 4,043 $ 3,164 $ 8,547 $ 11,891 $ 1,292 $ 1,000 $ 86,308 Quarter ended September 30, 2015 Beginning balance $ 33,729 $ 11,345 $ 2,451 $ 1,890 $ 6,367 $ 10,820 $ 4,861 $ 1,816 $ 73,279 Charge-offs (1,948 ) (563 ) (68 ) — (598 ) (1,172 ) (8 ) — (4,357 ) Recoveries 347 106 1 114 506 213 7 — 1,294 Net charge-offs (1,601 ) (457 ) (67 ) 114 (92 ) (959 ) (1 ) — (3,063 ) Provision for loan losses and other 3,247 967 226 (559 ) (181 ) 1,144 (744 ) (591 ) 3,509 Ending balance $ 35,375 $ 11,855 $ 2,610 $ 1,445 $ 6,094 $ 11,005 $ 4,116 $ 1,225 $ 73,725 Nine months ended September 30, 2016 Beginning balance $ 37,074 $ 13,116 $ 2,462 $ 1,440 $ 6,088 $ 11,812 $ 1,638 $ 1,225 $ 74,855 Charge-offs (5,684 ) (4,358 ) (288 ) (134 ) (2,833 ) (3,973 ) (2 ) — (17,272 ) Recoveries 1,693 153 95 44 314 975 — — 3,274 Net charge-offs (3,991 ) (4,205 ) (193 ) (90 ) (2,519 ) (2,998 ) (2 ) — (13,998 ) Provision for loan losses and other 9,435 4,942 1,774 1,814 4,978 3,077 (344 ) (225 ) 25,451 Ending balance $ 42,518 $ 13,853 $ 4,043 $ 3,164 $ 8,547 $ 11,891 $ 1,292 $ 1,000 $ 86,308 Nine months ended September 30, 2015 Beginning balance $ 29,458 $ 10,992 $ 2,249 $ 2,297 $ 8,327 $ 12,145 $ 7,226 $ 1,816 $ 74,510 Charge-offs (13,524 ) (2,613 ) (565 ) (15 ) (2,442 ) (2,723 ) (634 ) — (22,516 ) Recoveries 1,993 460 8 334 1,902 853 120 — 5,670 Net charge-offs (11,531 ) (2,153 ) (557 ) 319 (540 ) (1,870 ) (514 ) — (16,846 ) Provision for loan losses and other 17,448 3,016 918 (1,171 ) (1,693 ) 730 (2,596 ) (591 ) 16,061 Ending balance $ 35,375 $ 11,855 $ 2,610 $ 1,445 $ 6,094 $ 11,005 $ 4,116 $ 1,225 $ 73,725
Schedule of Loans and The Related Allowance For Credit Losses	The table below provides a breakdown of loans and the related allowance for credit losses by portfolio segment as of September 30, 2016 and December 31, 2015 . Loans and Related Allowance for Credit Losses by Portfolio Segment (Dollar amounts in thousands) Loans Allowance for Credit Losses Individually Evaluated for Impairment Collectively Evaluated for Impairment PCI Total Individually Evaluated for Impairment Collectively Evaluated for Impairment PCI Total As of September 30, 2016 Commercial, industrial, and agricultural $ 11,903 $ 3,242,734 $ 4,333 $ 3,258,970 $ — $ 41,880 $ 638 $ 42,518 Commercial real estate: Office, retail, and industrial 16,459 1,507,622 12,957 1,537,038 20 12,459 1,374 13,853 Multi-family 398 612,554 12,353 625,305 — 3,840 203 4,043 Construction 34 397,206 4,617 401,857 — 3,014 150 3,164 Other commercial real estate 1,813 955,735 13,307 970,855 17 7,442 1,088 8,547 Total commercial real estate 18,704 3,473,117 43,234 3,535,055 37 26,755 2,815 29,607 Total corporate loans 30,607 6,715,851 47,567 6,794,025 37 68,635 3,453 72,125 Consumer — 1,343,225 10,210 1,353,435 — 11,369 522 11,891 Covered loans — 16,094 8,228 24,322 — 119 1,173 1,292 Reserve for unfunded commitments — — — — — 1,000 — 1,000 Total loans $ 30,607 $ 8,075,170 $ 66,005 $ 8,171,782 $ 37 $ 81,123 $ 5,148 $ 86,308 As of December 31, 2015 Commercial, industrial, and agricultural $ 2,871 $ 2,902,361 $ 6,934 $ 2,912,166 $ 883 $ 35,378 $ 813 $ 37,074 Commercial real estate: Office, retail, and industrial 6,162 1,376,789 12,503 1,395,454 715 10,833 1,568 13,116 Multi-family 800 526,037 1,487 528,324 — 2,367 95 2,462 Construction 178 212,671 4,033 216,882 — 1,160 280 1,440 Other commercial real estate 3,665 913,161 14,364 931,190 — 5,367 721 6,088 Total commercial real estate 10,805 3,028,658 32,387 3,071,850 715 19,727 2,664 23,106 Total corporate loans 13,676 5,931,019 39,321 5,984,016 1,598 55,105 3,477 60,180 Consumer — 1,135,959 10,965 1,146,924 — 11,425 387 11,812 Covered loans — 20,856 9,919 30,775 — 248 1,390 1,638 Reserve for unfunded commitments — — — — — 1,225 — 1,225 Total loans $ 13,676 $ 7,087,834 $ 60,205 $ 7,161,715 $ 1,598 $ 68,003 $ 5,254 $ 74,855
Impaired Financing Receivables	The following table presents the average recorded investment and interest income recognized on impaired loans by class for the quarters and nine months ended September 30, 2016 and 2015 . PCI loans are excluded from this disclosure. Average Recorded Investment and Interest Income Recognized on Impaired Loans by Class (Dollar amounts in thousands) Quarters Ended September 30, 2016 2015 Average Interest Income Recognized (1) Average Interest Income Recognized (1) Commercial and industrial $ 7,829 $ 57 $ 5,968 $ 37 Agricultural — — — — Commercial real estate: Office, retail, and industrial 16,101 3 8,814 4 Multi-family 399 11 925 12 Construction 34 — 2,995 118 Other commercial real estate 2,561 — 3,442 15 Total commercial real estate 19,095 14 16,176 149 Total impaired loans $ 26,924 $ 71 $ 22,144 $ 186 Nine Months Ended September 30, 2016 2015 Average Interest (1) Average Interest (1) Commercial and industrial $ 5,312 $ 107 $ 10,457 $ 113 Agricultural — — — — Commercial real estate: Office, retail, and industrial 12,012 80 10,158 37 Multi-family 500 12 868 13 Construction 70 — 4,833 118 Other commercial real estate 3,190 72 3,222 34 Total commercial real estate 15,772 164 19,081 202 Total impaired loans $ 21,084 $ 271 $ 29,538 $ 315 (1) Recorded using the cash basis of accounting. The following table presents loans individually evaluated for impairment by class of loan as of September 30, 2016 and December 31, 2015 . PCI loans are excluded from this disclosure. Impaired Loans Individually Evaluated by Class (Dollar amounts in thousands) As of September 30, 2016 As of December 31, 2015 Recorded Investment In Recorded Investment In Loans with No Specific Reserve Loans with a Specific Reserve Unpaid Principal Balance Specific Reserve Loans with No Specific Reserve Loans with a Specific Reserve Unpaid Principal Balance Specific Reserve Commercial and industrial $ 11,903 $ — $ 13,984 $ — $ 1,673 $ 1,198 $ 4,592 $ 883 Agricultural — — — — — — — — Commercial real estate: Office, retail, and industrial 15,784 675 21,072 20 4,654 1,508 12,083 715 Multi-family 398 — 398 — 800 — 941 — Construction 34 — 34 — 178 — 299 — Other commercial real estate 1,543 270 2,599 17 3,665 — 4,403 — Total commercial real estate 17,759 945 24,103 37 9,297 1,508 17,726 715 Total impaired loans individually evaluated for impairment $ 29,662 $ 945 $ 38,087 $ 37 $ 10,970 $ 2,706 $ 22,318 $ 1,598
Financing Receivable Credit Quality Indicators	Consumer Credit Quality Indicators by Class, Excluding Covered Loans (Dollar amounts in thousands) Performing Non-accrual Total As of September 30, 2016 Home equity $ 728,344 $ 4,916 $ 733,260 1-4 family mortgages 384,905 3,240 388,145 Installment 232,030 — 232,030 Total consumer loans $ 1,345,279 $ 8,156 $ 1,353,435 As of December 31, 2015 Home equity $ 648,158 $ 5,310 $ 653,468 1-4 family mortgages 352,438 3,416 355,854 Installment 137,582 20 137,602 Total consumer loans $ 1,138,178 $ 8,746 $ 1,146,924 The following tables present credit quality indicators by class for corporate and consumer loans, excluding covered loans, as of September 30, 2016 and December 31, 2015 . Corporate Credit Quality Indicators by Class, Excluding Covered Loans (Dollar amounts in thousands) Pass Special Mention (1) (4) Substandard (2) (4) Non-accrual (3) Total As of September 30, 2016 Commercial and industrial $ 2,643,655 $ 110,716 $ 81,205 $ 13,823 $ 2,849,399 Agricultural 375,484 17,735 16,168 184 409,571 Commercial real estate: Office, retail, and industrial 1,444,815 38,672 35,881 17,670 1,537,038 Multi-family 616,820 4,399 3,770 316 625,305 Construction 389,174 69 12,327 287 401,857 Other commercial real estate 941,072 12,427 13,995 3,361 970,855 Total commercial real estate 3,391,881 55,567 65,973 21,634 3,535,055 Total corporate loans $ 6,411,020 $ 184,018 $ 163,346 $ 35,641 $ 6,794,025 As of December 31, 2015 Commercial and industrial $ 2,379,992 $ 86,263 $ 52,884 $ 5,587 $ 2,524,726 Agricultural 381,523 — 5,562 355 387,440 Commercial real estate: Office, retail, and industrial 1,320,164 32,627 35,788 6,875 1,395,454 Multi-family 517,412 6,146 3,970 796 528,324 Construction 201,496 4,678 9,803 905 216,882 Other commercial real estate 898,746 13,179 13,654 5,611 931,190 Total commercial real estate 2,937,818 56,630 63,215 14,187 3,071,850 Total corporate loans $ 5,699,333 $ 142,893 $ 121,661 $ 20,129 $ 5,984,016 (1) Loans categorized as special mention exhibit potential weaknesses that require the close attention of management since these potential weaknesses may result in the deterioration of repayment prospects in the future. (2) Loans categorized as substandard exhibit well-defined weaknesses that may jeopardize the liquidation of the debt. These loans continue to accrue interest because they are well secured and collection of principal and interest is expected within a reasonable time. (3) Loans categorized as non-accrual exhibit well-defined weaknesses that may jeopardize the liquidation of the debt or result in a loss if the deficiencies are not corrected. (4) Total special mention and substandard loans includes accruing TDR s of $841,000 as of September 30, 2016 and $862,000 as of December 31, 2015 .
Troubled Debt Restructuring Activity Rollforward	The table below presents TDR s by class as of September 30, 2016 and December 31, 2015 . See Note 1, "Summary of Significant Accounting Policies," for the accounting policy for TDR s. TDR s by Class (Dollar amounts in thousands) As of September 30, 2016 As of December 31, 2015 Accruing Non-accrual (1) Total Accruing Non-accrual (1) Total Commercial and industrial $ 286 $ 150 $ 436 $ 294 $ 1,050 $ 1,344 Commercial real estate: Office, retail, and industrial 157 — 157 164 — 164 Multi-family 588 172 760 598 186 784 Other commercial real estate 324 — 324 340 — 340 Total commercial real estate 1,069 172 1,241 1,102 186 1,288 Total corporate loans 1,355 322 1,677 1,396 1,236 2,632 Home equity 181 879 1,060 494 667 1,161 1-4 family mortgages 832 389 1,221 853 421 1,274 Total consumer loans 1,013 1,268 2,281 1,347 1,088 2,435 Total loans $ 2,368 $ 1,590 $ 3,958 $ 2,743 $ 2,324 $ 5,067 (1) These TDR s are included in non-accrual loans in the preceding tables. A rollforward of the carrying value of TDR s for the quarters and nine months ended September 30, 2016 and 2015 is presented in the following table. TDR Rollforward (Dollar amounts in thousands) Quarters Ended Nine Months Ended 2016 2015 2016 2015 Accruing Beginning balance $ 2,491 $ 3,067 $ 2,743 $ 3,704 Additions — 120 — 120 Net payments received (22 ) (355 ) (91 ) (746 ) Returned to performing status — — — — Net transfers to non-accrual (101 ) (61 ) (284 ) (307 ) Ending balance 2,368 2,771 2,368 2,771 Non-accrual Beginning balance 1,690 2,070 2,324 19,904 Additions — 325 — 325 Net payments received (31 ) (29 ) (609 ) (15,483 ) Charge-offs (170 ) (61 ) (409 ) (2,687 ) Net transfers from accruing 101 61 284 307 Ending balance 1,590 2,366 1,590 2,366 Total TDRs $ 3,958 $ 5,137 $ 3,958 $ 5,137

Premises, Furniture, and Equi29

Premises, Furniture, and Equipment (Tables)	9 Months Ended
	Sep. 30, 2016
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	The following table summarizes the Company's premises, furniture, and equipment by category. Premises, Furniture, and Equipment (Dollar amounts in thousands) As of September 30, December 31, Land $ 19,472 $ 43,442 Premises 96,178 152,444 Furniture and equipment 103,326 90,672 Total cost 218,976 286,558 Accumulated depreciation (141,500 ) (171,708 ) Net book value of premises, furniture, and equipment 77,476 114,850 Assets held-for-sale 4,967 7,428 Total premises, furniture, and equipment $ 82,443 $ 122,278
Schedule of Future Minimum Lease Payments for Operating Leases	The following summary reflects the future minimum payments by year required under operating leases that have initial or remaining non-cancelable lease terms in excess of one year as of September 30, 2016 . Future Minimum Operating Lease Payments (Dollar amounts in thousands) Total One year or less $ 21,332 After one year to two years 18,083 After two years to three years 16,762 After three years to four years 15,882 After four years to five years 14,476 After five years 109,752 Total minimum lease payments $ 196,287
Scheduled Accretion of Operating Lease Intangible	The following table presents the remaining scheduled accretion of the intangible liability by year. Scheduled Accretion of Operating Lease Intangible (Dollar amounts in thousands) Total One year or less $ 1,180 After one year to two years 1,011 After two years to three years 742 After three years to four years 648 After four years to five years 648 After five years 4,159 Total accretion $ 8,388
Schedule Of Rental Expense And Income	The following table presents net operating lease expense for the quarters and nine months ended September 30, 2016 and 2015 . Net Operating Lease Expense (Dollar amounts in thousands) Quarters Ended Nine Months Ended 2016 2015 2016 2015 Lease expense charged to operations (1) $ 1,950 $ 1,438 $ 4,902 $ 4,282 Rental income from premises leased to others (2) 118 167 404 454 Net operating lease expense $ 1,832 $ 1,271 $ 4,498 $ 3,828 (1) Includes amounts paid under short-term cancelable leases and is included in net occupancy and equipment expense in the Condensed Consolidated Statements of Income. For the quarter and nine months ended September 30, 2016 , lease expense is net of accretion related to the intangible liability of $295,000 and $876,000 , respectively. For the same periods in 2015 , lease expense is net of accretion related to the intangible liability of $286,000 and $858,000 . (2) Included as a reduction to net occupancy and equipment expense in the Condensed Consolidated Statements of Income.

Borrowed Funds (Tables)

Borrowed Funds (Tables)	9 Months Ended
	Sep. 30, 2016
Debt Disclosure [Abstract]
Summary of Borrowed Funds	The following table summarizes the Company 's borrowed funds by funding source. Summary of Borrowed Funds (Dollar amounts in thousands) As of September 30, December 31, Securities sold under agreements to repurchase $ 114,539 $ 155,196 FHLB advances 525,000 9,900 Total borrowed funds $ 639,539 $ 165,096

Senior and Subordinated Debt (T

Senior and Subordinated Debt (Tables)	9 Months Ended
	Sep. 30, 2016
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	The following table presents the Company 's senior and subordinated debt by issuance. Senior and Subordinated Debt (Dollar amounts in thousands) As of Issuance Date Maturity Date Interest Rate September 30, December 31, 2015 Senior notes November 2011 November 2016 5.875% $ 114,983 $ 114,891 Subordinated notes: Due in 2026 September 2016 September 2026 5.875% 146,484 — Due in 2016 March 2006 April 2016 5.850% — 38,499 Junior subordinated debentures: First Midwest Capital Trust I ("FMCT") November 2003 December 2033 6.950% 37,800 37,799 Great Lakes Statutory Trust II ("GLST II") (1) December 2005 December 2035 L+1.400% (2) 4,367 4,296 Great Lakes Statutory Trust III ("GLST III") (1) June 2007 September 2037 L+1.700% (2) 5,810 5,723 Total junior subordinated debentures 47,977 47,818 Total senior and subordinated debt $ 309,444 $ 201,208 (1) The junior subordinated debentures related to GLST II and GLST III were assumed by the Company during 2014 through the acquisition of Great Lakes Financial Resources, Inc., the holding company for Great Lakes Bank. These amounts include acquisition adjustments which resulted in a discount of $1.8 million to GLST II and $2.4 million to GLST III as of September 30, 2016 and $1.9 million to GLST II and $2.5 million to GLST III as of December 31, 2015 . (2) The interest rates are a variable rate based on the three-month LIBOR plus 1.400% and 1.700% for GLST II and GLST III, respectively.

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The table below displays the calculation of basic and diluted earnings per common share (" EPS "). Basic and Diluted EPS (Amounts in thousands, except per share data) Quarters Ended Nine Months Ended 2016 2015 2016 2015 Net income $ 28,402 $ 23,284 $ 71,631 $ 65,740 Net income applicable to non-vested restricted shares (324 ) (226 ) (826 ) (703 ) Net income applicable to common shares $ 28,078 $ 23,058 $ 70,805 $ 65,037 Weighted-average common shares outstanding: Weighted-average common shares outstanding (basic) 80,396 77,106 79,589 77,038 Dilutive effect of common stock equivalents 13 13 13 13 Weighted-average diluted common shares outstanding 80,409 77,119 79,602 77,051 Basic EPS $ 0.35 $ 0.30 $ 0.89 $ 0.84 Diluted EPS $ 0.35 $ 0.30 $ 0.89 $ 0.84 Anti-dilutive shares not included in the computation of diluted EPS (1) 454 751 510 822 (1) This amount represents outstanding stock options for which the exercise price is greater than the average market price of the Company's common stock.

Derivative Instruments and He33

Derivative Instruments and Hedging Activities (Tables)	9 Months Ended
	Sep. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Interest Rate Derivatives	Cash Flow Hedges (Dollar amounts in thousands) As of September 30, 2016 December 31, 2015 Gross notional amount outstanding $ 1,420,000 $ 1,220,000 Derivative asset fair value 15,093 4,787 Derivative liability fair value (14,836 ) (8,950 ) Weighted-average interest rate received 1.32 % 1.24 % Weighted-average interest rate paid 1.04 % 0.75 % Weighted-average maturity (in years) 3.04 3.91 Fair Value Hedges (Dollar amounts in thousands) As of September 30, 2016 December 31, 2015 Gross notional amount outstanding $ 10,710 $ 11,620 Derivative liability fair value (399 ) (643 ) Weighted-average interest rate received 2.44 % 2.25 % Weighted-average interest rate paid 6.35 % 6.36 % Weighted-average maturity (in years) 1.24 1.97 Fair value of derivative (1) $ 418 $ 665 (1) This amount represents the fair value if credit risk related contingent features were triggered.
Schedule of Derivative Instruments	Other Derivative Instruments (Dollar amounts in thousands) As of September 30, 2016 December 31, 2015 Gross notional amount outstanding $ 1,462,702 $ 853,385 Derivative asset fair value 29,835 11,446 Derivative liability fair value (29,835 ) (11,446 ) Fair value of derivative (1) 30,451 11,939 (1) This amount represents the fair value if credit risk related contingent features were triggered.
Offsetting Assets	The following table presents the fair value of the Company's derivatives and offsetting positions as of September 30, 2016 and December 31, 2015 . Fair Value of Offsetting Derivatives (Dollar amounts in thousands) As of September 30, 2016 As of December 31, 2015 Assets Liabilities Assets Liabilities Gross amounts recognized $ 44,928 $ 45,070 $ 16,233 $ 21,039 Less: amounts offset in the Consolidated Statements of Financial Condition — — — — Net amount presented in the Consolidated Statements of Financial Condition (1) 44,928 45,070 16,233 21,039 Gross amounts not offset in the Consolidated Statements of Financial Condition: Offsetting derivative positions (15,245 ) (15,245 ) (4,791 ) (4,791 ) Cash collateral pledged — (29,825 ) — (16,248 ) Net credit exposure $ 29,683 $ — $ 11,442 $ — (1) Included in other assets or other liabilities in the Consolidated Statements of Financial Condition.
Offsetting Liabilities	The following table presents the fair value of the Company's derivatives and offsetting positions as of September 30, 2016 and December 31, 2015 . Fair Value of Offsetting Derivatives (Dollar amounts in thousands) As of September 30, 2016 As of December 31, 2015 Assets Liabilities Assets Liabilities Gross amounts recognized $ 44,928 $ 45,070 $ 16,233 $ 21,039 Less: amounts offset in the Consolidated Statements of Financial Condition — — — — Net amount presented in the Consolidated Statements of Financial Condition (1) 44,928 45,070 16,233 21,039 Gross amounts not offset in the Consolidated Statements of Financial Condition: Offsetting derivative positions (15,245 ) (15,245 ) (4,791 ) (4,791 ) Cash collateral pledged — (29,825 ) — (16,248 ) Net credit exposure $ 29,683 $ — $ 11,442 $ — (1) Included in other assets or other liabilities in the Consolidated Statements of Financial Condition.

Commitments, Guarantees, and 34

Commitments, Guarantees, and Contingent Liabilities (Tables)	9 Months Ended
	Sep. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments Disclosure	Contractual or Notional Amounts of Financial Instruments (Dollar amounts in thousands) As of September 30, 2016 December 31, 2015 Commitments to extend credit: Commercial, industrial, and agricultural $ 1,462,813 $ 1,303,056 Commercial real estate 439,518 366,250 Home equity 387,194 352,114 Other commitments (1) 215,226 203,121 Total commitments to extend credit $ 2,504,751 $ 2,224,541 Letters of credit $ 107,461 $ 100,610 Recourse on assets sold: Unpaid principal balance of loans sold $ 187,891 $ 196,389 Carrying value of recourse obligation (2) 125 87 (1) Other commitments includes installment and overdraft protection program commitments. (2) Included in other liabilities in the Consolidated Statements of Financial Condition.

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value, Assets Measured on Recurring Basis	The following table provides the fair value for assets and liabilities required to be measured at fair value on a recurring basis in the Consolidated Statements of Financial Condition by level in the fair value hierarchy. Recurring Fair Value Measurements (Dollar amounts in thousands) As of September 30, 2016 As of December 31, 2015 Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Assets: Trading securities: Money market funds $ 1,707 $ — $ — $ 2,530 $ — $ — Mutual funds 16,644 — — 14,364 — — Total trading securities 18,351 — — 16,894 — — Securities available-for-sale: U.S. treasury securities 43,797 — — 16,980 — — U.S. agency securities — 192,931 — — 86,643 — CMOs — 1,081,259 — — 687,185 — MBSs — 324,484 — — 153,530 — Municipal securities — 286,713 — — 327,570 — CDOs — — 31,899 — — 31,529 Equity securities — 2,947 — — 3,199 — Total securities available-for-sale 43,797 1,888,334 31,899 16,980 1,258,127 31,529 Mortgage servicing rights ("MSRs") (1) — — 5,076 — — 1,853 Derivative assets (1) — 44,928 — — 16,233 — Liabilities: Derivative liabilities (2) $ — $ 45,070 $ — $ — $ 21,039 $ — (1) Included in other assets in the Consolidated Statements of Financial Condition. (2) Included in other liabilities in the Consolidated Statements of Financial Condition.
Significant Unobservable Inputs Used in the Valuation of CDOs	The following table presents the ranges of significant, unobservable inputs used by the Company to determine the fair value of MSR s as of September 30, 2016 . Significant Unobservable Inputs Used in the Valuation of MSR s As of September 30, 2016 December 31, 2015 Prepayment speed 10.2 % - 29.2% 10.1 % - 20.9% Maturity (months) 12 - 80 6 - 86 Discount rate 9.5 % - 13.0% 9.5 % - 13.0% The following table presents the ranges of significant, unobservable inputs calculated using the weighted-average of the Issuers used by the Company as of September 30, 2016 and December 31, 2015. Significant Unobservable Inputs Used in the Valuation of CDOs As of September 30, 2016 December 31, 2015 Probability of prepayment 1.8 % - 15.0% 1.8 % - 15.1% Probability of default 17.4 % - 49.0% 19.1 % - 32.6% Loss given default 93.1 % - 98.5% 93.8 % - 97.1% Probability of deferral cure 17.3 % - 100.0% 15.2 % - 63.1%
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation	A rollforward of the carrying value of CDOs for the quarters and nine months ended September 30, 2016 and 2015 is presented in the following table. Carrying Value of CDOs (Dollar amounts in thousands) Quarters Ended Nine Months Ended 2016 2015 2016 2015 Beginning balance $ 30,431 $ 32,004 $ 31,529 $ 33,774 Change in other comprehensive income (1) 1,794 (62 ) 764 (1,560 ) Paydowns (326 ) (72 ) (394 ) (344 ) Ending balance $ 31,899 $ 31,870 $ 31,899 $ 31,870 (1) Included in unrealized holding gains in the Consolidated Statements of Comprehensive Income.
Significant Unobservable Inputs Used in the Valuation of MSRs	The following table presents the ranges of significant, unobservable inputs used by the Company to determine the fair value of MSR s as of September 30, 2016 . Significant Unobservable Inputs Used in the Valuation of MSR s As of September 30, 2016 December 31, 2015 Prepayment speed 10.2 % - 29.2% 10.1 % - 20.9% Maturity (months) 12 - 80 6 - 86 Discount rate 9.5 % - 13.0% 9.5 % - 13.0% The following table presents the ranges of significant, unobservable inputs calculated using the weighted-average of the Issuers used by the Company as of September 30, 2016 and December 31, 2015. Significant Unobservable Inputs Used in the Valuation of CDOs As of September 30, 2016 December 31, 2015 Probability of prepayment 1.8 % - 15.0% 1.8 % - 15.1% Probability of default 17.4 % - 49.0% 19.1 % - 32.6% Loss given default 93.1 % - 98.5% 93.8 % - 97.1% Probability of deferral cure 17.3 % - 100.0% 15.2 % - 63.1%
Schedule of Servicing Assets at Fair Value	A rollforward of the carrying value of MSR s for the quarters and nine months ended September 30, 2016 and 2015 is presented in the following table. Carrying Value of MSR s (Dollar amounts in thousands) Quarters Ended Nine Months Ended 2016 2015 2016 2015 Beginning balance $ 4,938 $ 1,820 $ 1,853 $ 1,728 Additions from acquisition — — 3,092 — New MSRs 581 60 928 303 (Losses) gains included in earnings (1) : Changes in valuation inputs and assumptions (205 ) (12 ) (377 ) (51 ) Other changes in fair value (2) (238 ) (70 ) (420 ) (182 ) Ending balance $ 5,076 $ 1,798 $ 5,076 $ 1,798 Contractual servicing fees earned (1) $ 373 $ 136 $ 922 $ 404 (1) Included in mortgage banking income in the Condensed Consolidated Statements of Income and related to assets held as of September 30, 2016 and 2015 . (2) Primarily represents changes in expected future cash flows due to payoffs and paydowns.
Fair Value Measurements, Nonrecurring	The following table provides the fair value for each class of assets and liabilities required to be measured at fair value on a non-recurring basis in the Consolidated Statements of Financial Condition by level in the fair value hierarchy. Non-Recurring Fair Value Measurements (Dollar amounts in thousands) As of September 30, 2016 As of December 31, 2015 Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Collateral-dependent impaired loans (1) $ — $ — $ 10,156 $ — $ — $ 10,519 OREO (2) — — 4,090 — — 8,581 Loans held-for-sale (3) — — 29,645 — — 14,444 Assets held-for-sale (4) — — 4,967 — — 7,428 (1) Includes impaired loans with charge-offs and impaired loans with a specific reserve during the periods presented. (2) Includes OREO with fair value adjustments subsequent to initial transfer that occurred during the periods presented. (3) Included in other assets in the Consolidated Statements of Financial Condition. (4) Included in premises, furniture, and equipment in the Consolidated Statements of Financial Condition.
Fair Value, by Balance Sheet Grouping	For certain financial instruments that are not required to be measured at fair value in the Consolidated Statements of Financial Condition, the Company must disclose the estimated fair values and the level within the fair value hierarchy as shown in the following table. Fair Value Measurements of Other Financial Instruments (Dollar amounts in thousands) As of September 30, 2016 December 31, 2015 Fair Value Hierarchy Level Carrying Amount Fair Value Carrying Amount Fair Value Assets: Cash and due from banks 1 $ 139,538 $ 139,538 $ 114,587 $ 114,587 Interest-bearing deposits in other banks 2 362,153 362,153 266,615 266,615 Securities held-to-maturity 2 20,337 18,110 23,152 20,054 FHLB and FRB stock 2 53,506 53,506 39,306 39,306 Loans 3 8,091,306 7,997,227 7,091,988 6,959,024 Investment in BOLI 3 219,064 219,064 209,601 209,601 Accrued interest receivable 3 33,931 33,931 27,847 27,847 Other interest-earning assets 3 1,056 1,056 1,982 1,982 Liabilities: Deposits 2 $ 9,106,104 $ 9,104,564 $ 8,097,738 $ 8,093,640 Borrowed funds 2 639,539 639,539 165,096 165,096 Senior and subordinated debt 1 309,444 317,948 201,208 205,726 Accrued interest payable 2 4,856 4,856 2,175 2,175

Recent Accounting Pronounceme36

Recent Accounting Pronouncements (Details) $ in Millions	Sep. 30, 2016USD ($)
Accounting Changes and Error Corrections [Abstract]
Deferred gain, net	$ 82.5

Acquisitions (Details) - Narrat

Acquisitions (Details) - Narrative	Mar. 08, 2016USD ($)location	Dec. 03, 2015USD ($)location	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Jun. 30, 2016USD ($)	Jun. 28, 2016USD ($)location
Business Acquisition [Line Items]
Acquisition and integration related expenses			$ 1,172,000	$ 0	$ 6,810,000	$ 0
Standard Bancshares, Inc.
Business Acquisition [Line Items]
Announced number of locations to be acquired | location								35
Announced assets to be acquired							$ 2,500,000,000
Announced deposits to be acquired							2,200,000,000
Announced loans to be acquired							$ 1,800,000,000
Announced fixed exchange ratio								0.4350
Transaction value								$ 365,000,000
NI Bancshares Corporation
Business Acquisition [Line Items]
Number of retail branches acquired | location	10
Minimum value of trust assets under management acquired	$ 700,000,000
Consideration transferred	70,082,000
Goodwill	$ 20,762,000
Peoples Bancorp, Inc.
Business Acquisition [Line Items]
Number of retail branches acquired | location		2
Consideration transferred		$ 16,828,000
Goodwill		$ 7,544,000

Acquisitions (Details) - Acquis

Acquisitions (Details) - Acquisition Activity - USD ($) $ / shares in Units, $ in Thousands	Mar. 08, 2016	Dec. 03, 2015	Sep. 30, 2016
Liabilities
Intangible liabilities			$ 8,388
NI Bancshares Corporation
Assets
Cash and due from banks and interest-bearing deposits in other banks	$ 72,533
Securities available-for-sale	125,843
Securities held-to-maturity	1,864
FHLB and FRB stock	1,549
Loans	397,018
OREO	2,863
Investment in BOLI	8,384
Goodwill	20,762
Other intangible assets	10,925
Premises, furniture, and equipment	20,019
Accrued interest receivable and other assets	16,004
Total assets	677,764
Liabilities
Noninterest-bearing deposits	130,909
Interest-bearing deposits	464,012
Total deposits	594,921
Borrowed funds	2,416
Intangible liabilities	230
Accrued interest payable and other liabilities	10,115
Total liabilities	$ 607,682
Consideration Paid
Common stock, shares issued	3,042,494
Shares issued (in Dollars per share)	$ 18.059
Issuance costs	$ 48,000
Common stock (2016 - 3,042,494 shares issued at $18.059 per share), net of $48,000 in issuance costs	54,896
Cash paid	15,186
Total consideration paid	$ 70,082
Peoples Bancorp, Inc.
Assets
Cash and due from banks and interest-bearing deposits in other banks		$ 781
Securities available-for-sale		41,492
Securities held-to-maturity		0
FHLB and FRB stock		558
Loans		53,917
OREO		515
Investment in BOLI		0
Goodwill		7,544
Other intangible assets		580
Premises, furniture, and equipment		2,215
Accrued interest receivable and other assets		2,911
Total assets		110,513
Liabilities
Noninterest-bearing deposits		15,869
Interest-bearing deposits		75,944
Total deposits		91,813
Borrowed funds		1,200
Intangible liabilities		0
Accrued interest payable and other liabilities		672
Total liabilities		93,685
Consideration Paid
Common stock (2016 - 3,042,494 shares issued at $18.059 per share), net of $48,000 in issuance costs		0
Cash paid		16,828
Total consideration paid		$ 16,828

Securities (Details) - Securiti

Securities (Details) - Securities Portfolio - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Trading Securities and Other Trading Assets [Line Items]
Trading Securities	$ 18,351	$ 16,894
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,960,966	1,324,146
Gross Unrealized Gains	21,913	9,921
Gross Unrealized Losses	(18,849)	(27,431)
Fair Value	1,964,030	1,306,636
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	20,337	23,152
Municipal securities, Fair Value	18,110
U.S. treasury securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	43,593	17,000
Gross Unrealized Gains	212	15
Gross Unrealized Losses	(8)	(35)
Fair Value	43,797	16,980
U.S. agency securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	190,821	86,461
Gross Unrealized Gains	2,159	351
Gross Unrealized Losses	(49)	(169)
Fair Value	192,931	86,643
Collateralized mortgage obligations (CMOs)
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,074,736	695,198
Gross Unrealized Gains	8,759	1,072
Gross Unrealized Losses	(2,236)	(9,085)
Fair Value	1,081,259	687,185
Other mortgage-backed securities (MBSs)
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	319,964	152,481
Gross Unrealized Gains	4,641	1,920
Gross Unrealized Losses	(121)	(871)
Fair Value	324,484	153,530
Municipal securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	280,884	321,437
Gross Unrealized Gains	5,959	6,443
Gross Unrealized Losses	(130)	(310)
Fair Value	286,713	327,570
Trust-preferred collateralized debt obligations (CDOs)
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	47,893	48,287
Gross Unrealized Gains	73	34
Gross Unrealized Losses	(16,067)	(16,792)
Fair Value	31,899	31,529
Equity securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	3,075	3,282
Gross Unrealized Gains	110	86
Gross Unrealized Losses	(238)	(169)
Fair Value	2,947	3,199
Trading Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Trading Securities	18,351	16,894
Municipal securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	20,337	23,152
Municipal securities, Gross Unrealized Gains	0	0
Municipal securities, Gross Unrealized Losses	(2,227)	(3,098)
Municipal securities, Fair Value	$ 18,110	$ 20,054

Securities (Details) - Remainin

Securities (Details) - Remaining Contractual Maturity of Securities - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Available-for-sale Securities, Amortized Cost Basis [Abstract]
One year or less	$ 75,444
After one year to five years	433,027
After five years to ten years	6,827
After ten years	47,893
Securities that do not have a single contractual maturity date	1,397,775
Amortized Cost	1,960,966	$ 1,324,146
Available-for-sale Securities, Fair Value [Abstract]
One year or less	74,392
After one year to five years	426,991
After five years to ten years	6,732
After ten years	47,225
Securities that do not have a single contractual maturity date	1,408,690
Securities available-for-sale, at fair value	1,964,030	1,306,636
Held-to-maturity Securities, Amortized Cost [Abstract]
One year or less	3,218
After one year to five years	7,560
After five years to ten years	2,340
After ten years	7,219
Securities that do not have a single contractual maturity date	0
Amortized Cost	20,337	$ 23,152
Held-to-maturity Securities, Fair Value [Abstract]
One year or less	2,866
After one year to five years	6,732
After five years to ten years	2,084
After ten years	6,428
Securities that do not have a single contractual maturity date	0
Total	$ 18,110

Securities (Details) - Narrativ

Securities (Details) - Narrative - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Available-for-sale securities pledged as collateral	$ 1,300,000,000	$ 856,900,000
Held-to-maturity securities pledged as collateral	$ 0	$ 0

Securities (Details) - Securi42

Securities (Details) - Securities Gains (Losses) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Gains on sales of securities:
Gross realized gains	$ 187	$ 524	$ 1,266	$ 1,689
Gross realized losses	0	0	(169)	(138)
Net realized gains on sales of securities	187	524	1,097	1,551
Non-cash impairment charges:
Other-than-temporary securities impairment (OTTI)	0	0	0	0
Net realized gains	$ 187	$ 524	$ 1,097	$ 1,551

Securities (Details) - Changes

Securities (Details) - Changes In Credit Losses Recognized In Earnings $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)security
Changes in Credit Losses Recognized in Earnings [Roll Forward]
Beginning balance		$ 23,709	$ 23,709	$ 23,709	$ 23,880
OTTI included in earnings:
Reduction for sales of securities	[1],[2]	0	0	0	(171)
Ending balance		23,709	23,709	23,709	23,709
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Carrying value of CMOs sold	[1],[2]	$ 0	$ 0	$ 0	171
CMOs
OTTI included in earnings:
Reduction for sales of securities					$ (1,300)
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Number of CMOs sold | security					1
Carrying value of CMOs sold					$ 1,300
[1]	Included in net securities gains in the Condensed Consolidated Statements of Income.
[2]	This reduction was driven by the sale of one CMO with a carrying value of $1.3 million during the nine months ended September 30, 2015.

Securities (Details) - Securi44

Securities (Details) - Securities In An Unrealized Loss Position $ in Thousands	Sep. 30, 2016USD ($)security	Dec. 31, 2015USD ($)security
Securities (Details) - Securities In An Unrealized Loss Position [Line Items]
Number of Securities | security	156	252
Fair Value - Less Than 12 Months	$ 279,913	$ 428,035
Unrealized Losses - Less Than 12 Months	1,209	4,897
Fair Value - 12 Months or Longer	162,590	337,516
Unrealized Losses - 12 Months or Longer	17,640	22,534
Fair Value - Total	442,503	765,551
Unrealized Losses - Total	$ 18,849	$ 27,431
U.S. treasury securities
Securities (Details) - Securities In An Unrealized Loss Position [Line Items]
Number of Securities | security	5	4
Fair Value - Less Than 12 Months	$ 10,049	$ 7,946
Unrealized Losses - Less Than 12 Months	7	35
Fair Value - 12 Months or Longer	1,999	0
Unrealized Losses - 12 Months or Longer	1	0
Fair Value - Total	12,048	7,946
Unrealized Losses - Total	$ 8	$ 35
U.S. agency securities
Securities (Details) - Securities In An Unrealized Loss Position [Line Items]
Number of Securities | security	12	10
Fair Value - Less Than 12 Months	$ 23,394	$ 30,620
Unrealized Losses - Less Than 12 Months	49	169
Fair Value - 12 Months or Longer	0	0
Unrealized Losses - 12 Months or Longer	0	0
Fair Value - Total	23,394	30,620
Unrealized Losses - Total	$ 49	$ 169
CMOs
Securities (Details) - Securities In An Unrealized Loss Position [Line Items]
Number of Securities | security	64	133
Fair Value - Less Than 12 Months	$ 180,572	$ 309,787
Unrealized Losses - Less Than 12 Months	717	3,110
Fair Value - 12 Months or Longer	119,934	257,362
Unrealized Losses - 12 Months or Longer	1,519	5,975
Fair Value - Total	300,506	567,149
Unrealized Losses - Total	$ 2,236	$ 9,085
MBSs
Securities (Details) - Securities In An Unrealized Loss Position [Line Items]
Number of Securities | security	15	27
Fair Value - Less Than 12 Months	$ 45,686	$ 63,028
Unrealized Losses - Less Than 12 Months	89	427
Fair Value - 12 Months or Longer	6,573	31,980
Unrealized Losses - 12 Months or Longer	32	444
Fair Value - Total	52,259	95,008
Unrealized Losses - Total	$ 121	$ 871
Municipal securities
Securities (Details) - Securities In An Unrealized Loss Position [Line Items]
Number of Securities | security	49	68
Fair Value - Less Than 12 Months	$ 18,615	$ 8,135
Unrealized Losses - Less Than 12 Months	112	65
Fair Value - 12 Months or Longer	2,307	24,227
Unrealized Losses - 12 Months or Longer	18	245
Fair Value - Total	20,922	32,362
Unrealized Losses - Total	$ 130	$ 310
CDOs
Securities (Details) - Securities In An Unrealized Loss Position [Line Items]
Number of Securities | security	9	8
Fair Value - Less Than 12 Months	$ 1,218	$ 8,034
Unrealized Losses - Less Than 12 Months	9	971
Fair Value - 12 Months or Longer	29,398	21,642
Unrealized Losses - 12 Months or Longer	16,058	15,821
Fair Value - Total	30,616	29,676
Unrealized Losses - Total	$ 16,067	$ 16,792
Equity securities
Securities (Details) - Securities In An Unrealized Loss Position [Line Items]
Number of Securities | security	2	2
Fair Value - Less Than 12 Months	$ 379	$ 485
Unrealized Losses - Less Than 12 Months	226	120
Fair Value - 12 Months or Longer	2,379	2,305
Unrealized Losses - 12 Months or Longer	12	49
Fair Value - Total	2,758	2,790
Unrealized Losses - Total	$ 238	$ 169
Municipal securities
Schedule of Held-to-maturity Securities [Line Items]
Number of Securities | security	16	19
Fair Value - Less Than 12 Months	$ 18,110	$ 20,054
Unrealized Loss - Less Than 12 Months	2,227	3,098
Fair Value - 12 Months or Longer	0	0
Unrealized Losses - 12 Months or Longer	0	0
Fair Value - Total	18,110	20,054
Unrealized Losses - Total	$ 2,227	$ 3,098

Loans (Details) - Loan Portfoli

Loans (Details) - Loan Portfolio - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered loans	$ 24,322	$ 30,775
Total Loans	8,171,782	7,161,715
Deferred loan fees included in total loans	4,034	5,191
Overdrawn demand deposits included in total loans	3,428	2,810
Commercial, industrial, and agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	3,258,970	2,912,166
Commercial, industrial, and agricultural | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,849,399	2,524,726
Total Loans	2,849,399	2,524,726
Commercial, industrial, and agricultural | Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	409,571	387,440
Total Loans	409,571	387,440
Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	3,535,055	3,071,850
Total Loans	3,535,055	3,071,850
Commercial real estate loans | Office, retail, and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,537,038	1,395,454
Total Loans	1,537,038	1,395,454
Commercial real estate loans | Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	625,305	528,324
Total Loans	625,305	528,324
Commercial real estate loans | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	401,857	216,882
Total Loans	401,857	216,882
Commercial real estate loans | Other commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	970,855	931,190
Total Loans	970,855	931,190
Total corporate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	6,794,025	5,984,016
Total Loans	6,794,025	5,984,016
Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,353,435	1,146,924
Total Loans	1,353,435	1,146,924
Consumer loans | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	733,260	653,468
Total Loans	733,260	653,468
Consumer loans | 1-4 family mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	388,145	355,854
Total Loans	388,145	355,854
Consumer loans | Installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	232,030	137,602
Total Loans	$ 232,030	$ 137,602

Loans (Details) - Loans Sales

Loans (Details) - Loans Sales - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total net gains on loan sales		$ 3,307	$ 1,606	$ 6,272	$ 4,602
Corporate loan sales
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sales		12,223	10,226	36,082	19,649
Less book value of loans sold		11,828	9,771	34,718	18,780
Total net gains on loan sales	[1]	395	455	1,364	869
1-4 family mortgage loan sales
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sales		110,167	43,340	202,932	132,367
Less book value of loans sold		107,255	42,189	198,024	128,634
Total net gains on loan sales	[2]	$ 2,912	$ 1,151	$ 4,908	$ 3,733
[1]	Net gains on corporate loan sales are included in other service charges, commissions, and fees in the Condensed Consolidated Statements of Income.
[2]	Net gains on 1-4 family mortgage loan sales are included in mortgage banking income in the Condensed Consolidated Statements of Income.

Acquired and Covered Loans (Det

Acquired and Covered Loans (Details) - Acquired Loans - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Acquired Loans (Details) - Acquired Loans [Line Items]
Non-PCI	$ 702,521	$ 555,362
Total	768,526	615,567
Acquired loans
Acquired Loans (Details) - Acquired Loans [Line Items]
Non-PCI	686,427	534,506
Total	744,204	584,792
Covered loans
Acquired Loans (Details) - Acquired Loans [Line Items]
Non-PCI	16,094	20,856
Total	24,322	30,775
Receivables acquired with deteriorated credit quality
Acquired Loans (Details) - Acquired Loans [Line Items]
PCI	66,005	60,205
Receivables acquired with deteriorated credit quality | Acquired loans
Acquired Loans (Details) - Acquired Loans [Line Items]
PCI	57,777	50,286
Receivables acquired with deteriorated credit quality | Covered loans
Acquired Loans (Details) - Acquired Loans [Line Items]
PCI	$ 8,228	$ 9,919

Acquired and Covered Loans Acqu

Acquired and Covered Loans Acquired and Covered Loans (Details) - Narrative - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Acquired Loans [Abstract]
Renewed non-purchased credit impaired loans	$ 101.5	$ 61.6

Acquired and Covered Loans (D49

Acquired and Covered Loans (Details) - Changes in FDIC Indemnification Asset - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
FDIC Indemnification Asset [Roll Forward]
Beginning balance	$ 5,171	$ 7,335	$ 3,903	$ 8,452
Amortization	(302)	(321)	(884)	(1,174)
Change in expected reimbursements from the FDIC for changes in expected credit losses	(228)	487	(487)	2,207
Net payments to (from) the FDIC	191	(1,395)	2,300	(3,379)
Ending balance	$ 4,832	$ 6,106	$ 4,832	$ 6,106

Acquired and Covered Loans (D50

Acquired and Covered Loans (Details) - Changes in Accretable Yield - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Changes in Accretable Yield [Roll Forward]
Beginning balances		$ 25,082	$ 20,658	$ 24,912	$ 28,244
Additions		0	0	3,981	0
Accretion		(2,763)	(2,366)	(6,612)	(9,364)
Other	[1]	(1,012)	336	(974)	(252)
Ending balance		$ 21,307	$ 18,628	$ 21,307	$ 18,628
[1]	Decreases result from the resolution of certain loans occurring earlier than anticipated while increases represent a rise in the expected future cash flows to be collected over the remaining estimated life of the underlying portfolio.

Past Due Loans, Allowance For51

Past Due Loans, Allowance For Credit Losses, Impaired Loans, and TDRS (Details) - Aging Analysis of Past Due Loans and Non-Performing Loans by Class - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 8,111,982	$ 7,119,965
Total Past Due	59,800	41,750
Total Loans	8,171,782	7,161,715
Non- accrual	44,289	29,430
90 Days or More Past Due, Still Accruing Interest	4,318	3,057
Covered loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	23,905	29,808
Total Past Due	417	967
Total Loans	24,322	30,775
Non- accrual	492	555
90 Days or More Past Due, Still Accruing Interest	0	174
30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	30,349	19,049
30-89 Days Past Due | Covered loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	319	405
90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	29,451	22,701
90 Days or More Past Due | Covered loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	98	562
Commercial, industrial, and agricultural
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	3,258,970	2,912,166
Commercial, industrial, and agricultural | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,833,642	2,516,197
Total Past Due	15,757	8,529
Total Loans	2,849,399	2,524,726
Non- accrual	13,823	5,587
90 Days or More Past Due, Still Accruing Interest	2,154	857
Commercial, industrial, and agricultural | Agricultural
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	406,947	387,109
Total Past Due	2,624	331
Total Loans	409,571	387,440
Non- accrual	184	355
90 Days or More Past Due, Still Accruing Interest	0	0
Commercial, industrial, and agricultural | 30-89 Days Past Due | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	9,099	4,956
Commercial, industrial, and agricultural | 30-89 Days Past Due | Agricultural
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,460	245
Commercial, industrial, and agricultural | 90 Days or More Past Due | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	6,658	3,573
Commercial, industrial, and agricultural | 90 Days or More Past Due | Agricultural
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	164	86
Commercial real estate loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	3,505,150	3,051,916
Total Past Due	29,905	19,934
Total Loans	3,535,055	3,071,850
Non- accrual	21,634	14,187
90 Days or More Past Due, Still Accruing Interest	1,468	1,213
Commercial real estate loans | Office, retail, and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,516,820	1,386,383
Total Past Due	20,218	9,071
Total Loans	1,537,038	1,395,454
Non- accrual	17,670	6,875
90 Days or More Past Due, Still Accruing Interest	82	4
Commercial real estate loans | Multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	623,386	526,625
Total Past Due	1,919	1,699
Total Loans	625,305	528,324
Non- accrual	316	796
90 Days or More Past Due, Still Accruing Interest	454	548
Commercial real estate loans | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	400,809	216,377
Total Past Due	1,048	505
Total Loans	401,857	216,882
Non- accrual	287	905
90 Days or More Past Due, Still Accruing Interest	0	0
Commercial real estate loans | Other commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	964,135	922,531
Total Past Due	6,720	8,659
Total Loans	970,855	931,190
Non- accrual	3,361	5,611
90 Days or More Past Due, Still Accruing Interest	932	661
Commercial real estate loans | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	11,158	6,763
Commercial real estate loans | 30-89 Days Past Due | Office, retail, and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	5,816	2,647
Commercial real estate loans | 30-89 Days Past Due | Multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,321	541
Commercial real estate loans | 30-89 Days Past Due | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	767	0
Commercial real estate loans | 30-89 Days Past Due | Other commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,254	3,575
Commercial real estate loans | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	18,747	13,171
Commercial real estate loans | 90 Days or More Past Due | Office, retail, and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	14,402	6,424
Commercial real estate loans | 90 Days or More Past Due | Multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	598	1,158
Commercial real estate loans | 90 Days or More Past Due | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	281	505
Commercial real estate loans | 90 Days or More Past Due | Other commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,466	5,084
Total corporate loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	6,745,739	5,955,222
Total Past Due	48,286	28,794
Total Loans	6,794,025	5,984,016
Non- accrual	35,641	20,129
90 Days or More Past Due, Still Accruing Interest	3,622	2,070
Total corporate loans | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	22,717	11,964
Total corporate loans | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	25,569	16,830
Consumer loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,342,338	1,134,935
Total Past Due	11,097	11,989
Total Loans	1,353,435	1,146,924
Non- accrual	8,156	8,746
90 Days or More Past Due, Still Accruing Interest	696	813
Consumer loans | Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	727,433	647,175
Total Past Due	5,827	6,293
Total Loans	733,260	653,468
Non- accrual	4,916	5,310
90 Days or More Past Due, Still Accruing Interest	165	216
Consumer loans | 1-4 family mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	385,024	350,980
Total Past Due	3,121	4,874
Total Loans	388,145	355,854
Non- accrual	3,240	3,416
90 Days or More Past Due, Still Accruing Interest	235	528
Consumer loans | Installment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	229,881	136,780
Total Past Due	2,149	822
Total Loans	232,030	137,602
Non- accrual	0	20
90 Days or More Past Due, Still Accruing Interest	296	69
Consumer loans | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	7,313	6,680
Consumer loans | 30-89 Days Past Due | Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,591	3,247
Consumer loans | 30-89 Days Past Due | 1-4 family mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,869	2,680
Consumer loans | 30-89 Days Past Due | Installment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,853	753
Consumer loans | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,784	5,309
Consumer loans | 90 Days or More Past Due | Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,236	3,046
Consumer loans | 90 Days or More Past Due | 1-4 family mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,252	2,194
Consumer loans | 90 Days or More Past Due | Installment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 296	$ 69

Past Due Loans, Allowance For52

Past Due Loans, Allowance For Credit Losses, Impaired Loans, and TDRS (Details) - Allowance for Credit Losses - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance	$ 81,505	$ 73,279	$ 74,855	$ 74,510
Charge-offs	(5,950)	(4,357)	(17,272)	(22,516)
Recoveries	1,155	1,294	3,274	5,670
Net charge-offs	(4,795)	(3,063)	(13,998)	(16,846)
Provision for loan losses and other	9,598	3,509	25,451	16,061
Ending balance	86,308	73,725	86,308	73,725
Covered loans
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance	1,394	4,861	1,638	7,226
Charge-offs	0	(8)	(2)	(634)
Recoveries	0	7	0	120
Net charge-offs	0	(1)	(2)	(514)
Provision for loan losses and other	(102)	(744)	(344)	(2,596)
Ending balance	1,292	4,116	1,292	4,116
Reserve for Unfunded Commitments
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance	1,400	1,816	1,225	1,816
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Net charge-offs	0	0	0	0
Provision for loan losses and other	(400)	(591)	(225)	(591)
Ending balance	1,000	1,225	1,000	1,225
Commercial, industrial, and agricultural
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance	40,084	33,729	37,074	29,458
Charge-offs	(1,760)	(1,948)	(5,684)	(13,524)
Recoveries	615	347	1,693	1,993
Net charge-offs	(1,145)	(1,601)	(3,991)	(11,531)
Provision for loan losses and other	3,579	3,247	9,435	17,448
Ending balance	42,518	35,375	42,518	35,375
Commercial real estate loans
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance			23,106
Ending balance	29,607		29,607
Commercial real estate loans | Office, Retail, and Industrial
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance	12,985	11,345	13,116	10,992
Charge-offs	(2,193)	(563)	(4,358)	(2,613)
Recoveries	42	106	153	460
Net charge-offs	(2,151)	(457)	(4,205)	(2,153)
Provision for loan losses and other	3,019	967	4,942	3,016
Ending balance	13,853	11,855	13,853	11,855
Commercial real estate loans | Multi-family
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance	2,926	2,451	2,462	2,249
Charge-offs	0	(68)	(288)	(565)
Recoveries	69	1	95	8
Net charge-offs	69	(67)	(193)	(557)
Provision for loan losses and other	1,048	226	1,774	918
Ending balance	4,043	2,610	4,043	2,610
Commercial real estate loans | Construction
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance	2,239	1,890	1,440	2,297
Charge-offs	0	0	(134)	(15)
Recoveries	9	114	44	334
Net charge-offs	9	114	(90)	319
Provision for loan losses and other	916	(559)	1,814	(1,171)
Ending balance	3,164	1,445	3,164	1,445
Commercial real estate loans | Other commercial real estate
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance	7,474	6,367	6,088	8,327
Charge-offs	(509)	(598)	(2,833)	(2,442)
Recoveries	94	506	314	1,902
Net charge-offs	(415)	(92)	(2,519)	(540)
Provision for loan losses and other	1,488	(181)	4,978	(1,693)
Ending balance	8,547	6,094	8,547	6,094
Consumer loans
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance			11,812
Ending balance	11,891		11,891
Consumer loans | Consumer loans
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance	13,003	10,820	11,812	12,145
Charge-offs	(1,488)	(1,172)	(3,973)	(2,723)
Recoveries	326	213	975	853
Net charge-offs	(1,162)	(959)	(2,998)	(1,870)
Provision for loan losses and other	50	1,144	3,077	730
Ending balance	$ 11,891	$ 11,005	$ 11,891	$ 11,005

Past Due Loans, Allowance For53

Past Due Loans, Allowance For Credit Losses, Impaired Loans, and TDRS (Details) - Loans and Related Allowance for Credit Losses by Portfolio Segment - USD ($) $ in Thousands	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Individually Evaluated for Impairment	$ 30,607		$ 13,676
Loans Collectively Evaluated for Impairment	8,075,170		7,087,834
Loans	8,171,782		7,161,715
Allowance for Credit Losses Individually Evaluated for Impairment	37		1,598
Allowance for Credit Losses Collectively Evaluated for Impairment	81,123		68,003
Total Allowance for Credit Losses	86,308	$ 81,505	74,855	$ 73,725	$ 73,279	$ 74,510
Receivables acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
PCI	66,005		60,205
Total Allowance for Credit Losses	5,148		5,254
Covered loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Individually Evaluated for Impairment	0		0
Loans Collectively Evaluated for Impairment	16,094		20,856
Loans	24,322		30,775
Allowance for Credit Losses Individually Evaluated for Impairment	0		0
Allowance for Credit Losses Collectively Evaluated for Impairment	119		248
Total Allowance for Credit Losses	1,292		1,638
Covered loans | Receivables acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
PCI	8,228		9,919
Total Allowance for Credit Losses	1,173		1,390
Reserve for unfunded commitments
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Individually Evaluated for Impairment	0		0
Loans Collectively Evaluated for Impairment	0		0
Loans	0		0
Allowance for Credit Losses Individually Evaluated for Impairment	0		0
Allowance for Credit Losses Collectively Evaluated for Impairment	1,000		1,225
Total Allowance for Credit Losses	1,000		1,225
Reserve for unfunded commitments | Receivables acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
PCI	0		0
Total Allowance for Credit Losses	0		0
Commercial, industrial, and agricultural
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Individually Evaluated for Impairment	11,903		2,871
Loans Collectively Evaluated for Impairment	3,242,734		2,902,361
Loans	3,258,970		2,912,166
Allowance for Credit Losses Individually Evaluated for Impairment	0		883
Allowance for Credit Losses Collectively Evaluated for Impairment	41,880		35,378
Total Allowance for Credit Losses	42,518	$ 40,084	37,074	$ 35,375	$ 33,729	$ 29,458
Commercial, industrial, and agricultural | Receivables acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
PCI	4,333		6,934
Total Allowance for Credit Losses	638		813
Commercial real estate loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Individually Evaluated for Impairment	18,704		10,805
Loans Collectively Evaluated for Impairment	3,473,117		3,028,658
Loans	3,535,055		3,071,850
Allowance for Credit Losses Individually Evaluated for Impairment	37		715
Allowance for Credit Losses Collectively Evaluated for Impairment	26,755		19,727
Total Allowance for Credit Losses	29,607		23,106
Commercial real estate loans | Receivables acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
PCI	43,234		32,387
Total Allowance for Credit Losses	2,815		2,664
Commercial real estate loans | Office, retail, and industrial
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Individually Evaluated for Impairment	16,459		6,162
Loans Collectively Evaluated for Impairment	1,507,622		1,376,789
Loans	1,537,038		1,395,454
Allowance for Credit Losses Individually Evaluated for Impairment	20		715
Allowance for Credit Losses Collectively Evaluated for Impairment	12,459		10,833
Total Allowance for Credit Losses	13,853		13,116
Commercial real estate loans | Office, retail, and industrial | Receivables acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
PCI	12,957		12,503
Total Allowance for Credit Losses	1,374		1,568
Commercial real estate loans | Multi-family
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Individually Evaluated for Impairment	398		800
Loans Collectively Evaluated for Impairment	612,554		526,037
Loans	625,305		528,324
Allowance for Credit Losses Individually Evaluated for Impairment	0		0
Allowance for Credit Losses Collectively Evaluated for Impairment	3,840		2,367
Total Allowance for Credit Losses	4,043		2,462
Commercial real estate loans | Multi-family | Receivables acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
PCI	12,353		1,487
Total Allowance for Credit Losses	203		95
Commercial real estate loans | Construction
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Individually Evaluated for Impairment	34		178
Loans Collectively Evaluated for Impairment	397,206		212,671
Loans	401,857		216,882
Allowance for Credit Losses Individually Evaluated for Impairment	0		0
Allowance for Credit Losses Collectively Evaluated for Impairment	3,014		1,160
Total Allowance for Credit Losses	3,164		1,440
Commercial real estate loans | Construction | Receivables acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
PCI	4,617		4,033
Total Allowance for Credit Losses	150		280
Commercial real estate loans | Other commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Individually Evaluated for Impairment	1,813		3,665
Loans Collectively Evaluated for Impairment	955,735		913,161
Loans	970,855		931,190
Allowance for Credit Losses Individually Evaluated for Impairment	17		0
Allowance for Credit Losses Collectively Evaluated for Impairment	7,442		5,367
Total Allowance for Credit Losses	8,547		6,088
Commercial real estate loans | Other commercial real estate | Receivables acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
PCI	13,307		14,364
Total Allowance for Credit Losses	1,088		721
Total corporate loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Individually Evaluated for Impairment	30,607		13,676
Loans Collectively Evaluated for Impairment	6,715,851		5,931,019
Loans	6,794,025		5,984,016
Allowance for Credit Losses Individually Evaluated for Impairment	37		1,598
Allowance for Credit Losses Collectively Evaluated for Impairment	68,635		55,105
Total Allowance for Credit Losses	72,125		60,180
Total corporate loans | Receivables acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
PCI	47,567		39,321
Total Allowance for Credit Losses	3,453		3,477
Consumer loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Individually Evaluated for Impairment	0		0
Loans Collectively Evaluated for Impairment	1,343,225		1,135,959
Loans	1,353,435		1,146,924
Allowance for Credit Losses Individually Evaluated for Impairment	0		0
Allowance for Credit Losses Collectively Evaluated for Impairment	11,369		11,425
Total Allowance for Credit Losses	11,891		11,812
Consumer loans | Receivables acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
PCI	10,210		10,965
Total Allowance for Credit Losses	$ 522		$ 387

Past Due Loans, Allowance For54

Past Due Loans, Allowance For Credit Losses, Impaired Loans, and TDRS (Details) - Impaired Loans Individually Evaluated by Class - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans with No Specific Reserve	$ 29,662	$ 10,970
Recorded Investment in Loans with a Specific Reserve	945	2,706
Unpaid Principal Balance	38,087	22,318
Specific Reserve	37	1,598
Commercial, industrial, and agricultural | Commercial and industrial
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans with No Specific Reserve	11,903	1,673
Recorded Investment in Loans with a Specific Reserve	0	1,198
Unpaid Principal Balance	13,984	4,592
Specific Reserve	0	883
Commercial, industrial, and agricultural | Agricultural
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans with No Specific Reserve	0	0
Recorded Investment in Loans with a Specific Reserve	0	0
Unpaid Principal Balance	0	0
Specific Reserve	0	0
Commercial real estate loans
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans with No Specific Reserve	17,759	9,297
Recorded Investment in Loans with a Specific Reserve	945	1,508
Unpaid Principal Balance	24,103	17,726
Specific Reserve	37	715
Commercial real estate loans | Office, retail, and industrial
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans with No Specific Reserve	15,784	4,654
Recorded Investment in Loans with a Specific Reserve	675	1,508
Unpaid Principal Balance	21,072	12,083
Specific Reserve	20	715
Commercial real estate loans | Multi-family
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans with No Specific Reserve	398	800
Recorded Investment in Loans with a Specific Reserve	0	0
Unpaid Principal Balance	398	941
Specific Reserve	0	0
Commercial real estate loans | Construction
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans with No Specific Reserve	34	178
Recorded Investment in Loans with a Specific Reserve	0	0
Unpaid Principal Balance	34	299
Specific Reserve	0	0
Commercial real estate loans | Other commercial real estate
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans with No Specific Reserve	1,543	3,665
Recorded Investment in Loans with a Specific Reserve	270	0
Unpaid Principal Balance	2,599	4,403
Specific Reserve	$ 17	$ 0

Past Due Loans, Allowance For55

Past Due Loans, Allowance For Credit Losses, Impaired Loans, and TDRS (Details) - Impaired Loans Individually Evaluated by Class (Continued) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		$ 26,924	$ 22,144	$ 21,084	$ 29,538
Interest Income Recognized	[1]	71	186	271	315
Commercial, industrial, and agricultural | Commercial and industrial
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		7,829	5,968	5,312	10,457
Interest Income Recognized	[1]	57	37	107	113
Commercial, industrial, and agricultural | Agricultural
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		0	0	0	0
Interest Income Recognized	[1]	0	0	0	0
Commercial real estate loans
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		19,095	16,176	15,772	19,081
Interest Income Recognized	[1]	14	149	164	202
Commercial real estate loans | Office, retail, and industrial
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		16,101	8,814	12,012	10,158
Interest Income Recognized	[1]	3	4	80	37
Commercial real estate loans | Multi-family
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		399	925	500	868
Interest Income Recognized	[1]	11	12	12	13
Commercial real estate loans | Construction
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		34	2,995	70	4,833
Interest Income Recognized	[1]	0	118	0	118
Commercial real estate loans | Other commercial real estate
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		2,561	3,442	3,190	3,222
Interest Income Recognized	[1]	$ 0	$ 15	$ 72	$ 34
[1]	Recorded using the cash basis of accounting.

Past Due Loans, Allowance For56

Past Due Loans, Allowance For Credit Losses, Impaired Loans, and TDRS (Details) - Credit Quality Indicators by Class, Excluding Covered Loans - USD ($) $ in Thousands		Sep. 30, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Accruing		$ 2,368	$ 2,743
Special Mention and Substandard Loans
Financing Receivable, Recorded Investment [Line Items]
Accruing		841	862
Commercial loans
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		6,794,025	5,984,016
Commercial loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		6,411,020	5,699,333
Commercial loans | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[1],[2]	184,018	142,893
Commercial loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[2],[3]	163,346	121,661
Commercial loans | Substandard Non-Accrual
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[4]	35,641	20,129
Commercial, industrial, and agricultural | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		2,849,399	2,524,726
Accruing		286	294
Commercial, industrial, and agricultural | Commercial and industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		2,643,655	2,379,992
Commercial, industrial, and agricultural | Commercial and industrial | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[1],[2]	110,716	86,263
Commercial, industrial, and agricultural | Commercial and industrial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[2],[3]	81,205	52,884
Commercial, industrial, and agricultural | Commercial and industrial | Substandard Non-Accrual
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[4]	13,823	5,587
Commercial, industrial, and agricultural | Agricultural
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		409,571	387,440
Commercial, industrial, and agricultural | Agricultural | Pass
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		375,484	381,523
Commercial, industrial, and agricultural | Agricultural | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[1],[2]	17,735	0
Commercial, industrial, and agricultural | Agricultural | Substandard
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[2],[3]	16,168	5,562
Commercial, industrial, and agricultural | Agricultural | Substandard Non-Accrual
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[4]	184	355
Commercial real estate loans
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		3,535,055	3,071,850
Accruing		1,069	1,102
Commercial real estate loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		3,391,881	2,937,818
Commercial real estate loans | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[1],[2]	55,567	56,630
Commercial real estate loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[2],[3]	65,973	63,215
Commercial real estate loans | Substandard Non-Accrual
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[4]	21,634	14,187
Commercial real estate loans | Office, retail, and industrial
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		1,537,038	1,395,454
Accruing		157	164
Commercial real estate loans | Office, retail, and industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		1,444,815	1,320,164
Commercial real estate loans | Office, retail, and industrial | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[1],[2]	38,672	32,627
Commercial real estate loans | Office, retail, and industrial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[2],[3]	35,881	35,788
Commercial real estate loans | Office, retail, and industrial | Substandard Non-Accrual
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[4]	17,670	6,875
Commercial real estate loans | Multi-family
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		625,305	528,324
Accruing		588	598
Commercial real estate loans | Multi-family | Pass
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		616,820	517,412
Commercial real estate loans | Multi-family | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[1],[2]	4,399	6,146
Commercial real estate loans | Multi-family | Substandard
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[2],[3]	3,770	3,970
Commercial real estate loans | Multi-family | Substandard Non-Accrual
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[4]	316	796
Commercial real estate loans | Construction
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		401,857	216,882
Commercial real estate loans | Construction | Pass
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		389,174	201,496
Commercial real estate loans | Construction | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[1],[2]	69	4,678
Commercial real estate loans | Construction | Substandard
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[2],[3]	12,327	9,803
Commercial real estate loans | Construction | Substandard Non-Accrual
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[4]	287	905
Commercial real estate loans | Other commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		970,855	931,190
Accruing		324	340
Commercial real estate loans | Other commercial real estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		941,072	898,746
Commercial real estate loans | Other commercial real estate | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[1],[2]	12,427	13,179
Commercial real estate loans | Other commercial real estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[2],[3]	13,995	13,654
Commercial real estate loans | Other commercial real estate | Substandard Non-Accrual
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[4]	$ 3,361	$ 5,611
[1]	Loans categorized as special mention exhibit potential weaknesses that require the close attention of management since these potential weaknesses may result in the deterioration of repayment prospects in the future.
[2]	Total special mention and substandard loans includes accruing TDRs of $841,000 as of September 30, 2016 and $862,000 as of December 31, 2015.
[3]	Loans categorized as substandard exhibit well-defined weaknesses that may jeopardize the liquidation of the debt. These loans continue to accrue interest because they are well secured and collection of principal and interest is expected within a reasonable time.
[4]	Loans categorized as non-accrual exhibit well-defined weaknesses that may jeopardize the liquidation of the debt or result in a loss if the deficiencies are not corrected.

Past Due Loans, Allowance For57

Past Due Loans, Allowance For Credit Losses, Impaired Loans, and TDRS (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) - Consumer loans - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Credit Quality Indicators by Class	$ 1,353,435	$ 1,146,924
Performing
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Credit Quality Indicators by Class	1,345,279	1,138,178
Non-accrual
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Credit Quality Indicators by Class	8,156	8,746
Home equity
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Credit Quality Indicators by Class	733,260	653,468
Home equity | Performing
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Credit Quality Indicators by Class	728,344	648,158
Home equity | Non-accrual
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Credit Quality Indicators by Class	4,916	5,310
1-4 family mortgages
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Credit Quality Indicators by Class	388,145	355,854
1-4 family mortgages | Performing
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Credit Quality Indicators by Class	384,905	352,438
1-4 family mortgages | Non-accrual
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Credit Quality Indicators by Class	3,240	3,416
Installment
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Credit Quality Indicators by Class	232,030	137,602
Installment | Performing
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Credit Quality Indicators by Class	232,030	137,582
Installment | Non-accrual
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Credit Quality Indicators by Class	$ 0	$ 20

Past Due Loans, Allowance For58

Past Due Loans, Allowance For Credit Losses, Impaired Loans, and TDRS (Details) - TDRs By Class - USD ($) $ in Thousands		Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing		$ 2,368	$ 2,743
Non-accrual	[1]	1,590	2,324
Total		3,958	5,067	$ 5,137
Commercial, industrial, and agricultural | Commercial and industrial
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing		286	294
Non-accrual	[1]	150	1,050
Total		436	1,344
Commercial real estate loans
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing		1,069	1,102
Non-accrual	[1]	172	186
Total		1,241	1,288
Commercial real estate loans | Office, retail, and industrial
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing		157	164
Non-accrual	[1]	0	0
Total		157	164
Commercial real estate loans | Multi-family
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing		588	598
Non-accrual	[1]	172	186
Total		760	784
Commercial real estate loans | Other commercial real estate
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing		324	340
Non-accrual	[1]	0	0
Total		324	340
Total corporate loans
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing		1,355	1,396
Non-accrual	[1]	322	1,236
Total		1,677	2,632
Consumer loans
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing		1,013	1,347
Non-accrual	[1]	1,268	1,088
Total		2,281	2,435
Consumer loans | Home equity
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing		181	494
Non-accrual	[1]	879	667
Total		1,060	1,161
Consumer loans | 1-4 family mortgages
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing		832	853
Non-accrual	[1]	389	421
Total		$ 1,221	$ 1,274
[1]	These TDRs are included in non-accrual loans in the preceding tables.

Past Due Loans, Allowance For59

Past Due Loans, Allowance For Credit Losses, Impaired Loans, and TDRS (Details) - Narrative - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Valuation allowance on TDR loans	$ 0	$ 758,000
Commitments to lend additional funds TDRs	$ 0	$ 0

Past Due Loans, Allowance For60

Past Due Loans, Allowance For Credit Losses, Impaired Loans, and TDRS (Details) - TDR Rollforward - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Troubled Debt Restructuring Activity Rollforward [Rollforward]
Beginning balance			$ 5,067
Additions				$ 325
Net payments received			(91)
Ending balance	$ 3,958	$ 5,137	3,958	5,137
Accruing
Troubled Debt Restructuring Activity Rollforward [Rollforward]
Beginning balance	2,491	3,067	2,743	3,704
Additions	0	120	0	120
Net payments received	(22)	(355)		(746)
Returned to performing status	0	0	0	0
Net transfers to non-accrual	(101)	(61)	(284)	(307)
Ending balance	2,368	2,771	2,368	2,771
Non-accrual
Troubled Debt Restructuring Activity Rollforward [Rollforward]
Beginning balance	1,690	2,070	2,324	19,904
Additions	0	325	0
Net payments received	(31)	(29)	(609)	(15,483)
Charge-offs	(170)	(61)	(409)	(2,687)
Net transfers from accruing	101	61	284	307
Ending balance	$ 1,590	$ 2,366	$ 1,590	$ 2,366

Premises, Furniture, and Equi61

Premises, Furniture, and Equipment (Details) - Premises, Furniture, and Equipment - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Land	$ 19,472	$ 43,442
Premises	96,178	152,444
Furniture and equipment	103,326	90,672
Total cost	218,976	286,558
Accumulated depreciation	(141,500)	(171,708)
Net book value of premises, furniture, and equipment	77,476	114,850
Assets held-for-sale	4,967	7,428
Total premises, furniture, and equipment	$ 82,443	$ 122,278

Premises, Furniture, and Equi62

Premises, Furniture, and Equipment (Details) - Narrative $ in Thousands	Sep. 27, 2016USD ($)retail_branch	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Dec. 31, 2014USD ($)
Property, Plant and Equipment [Line Items]
Aggregate cash purchase price	$ 150,300
Number of branches sold | retail_branch	55
Net book value of properties	$ 58,800
Initial term of lease for sale-leaseback transaction	14 years
Number of Lease Renewal Options		5		5
Pre-tax gain on sale-leaseback transaction		$ 88,000		$ 88,000
Net gain on sale-leaseback transaction		5,509	$ 0	5,509	$ 0
Deferred gain, net		82,500		82,500
First year rent expense due under sale-leaseback transaction	$ 10,500
Percentage of rent escalation under sale-leaseback transaction	1.50%
Depreciation of premises, furniture, and equipment		3,400	$ 3,400	10,100	$ 10,100
Intangible liabilities		$ 8,388		$ 8,388
Popular Community Bank
Property, Plant and Equipment [Line Items]
Intangible liabilities						$ 10,600
Five Year Renewal Period
Property, Plant and Equipment [Line Items]
Renewal lease periods for sale-leaseback transactions	5 years

Premises, Furniture, and Equi63

Premises, Furniture, and Equipment (Details) - Operating Leases $ in Thousands	Sep. 30, 2016USD ($)
Property, Plant and Equipment [Abstract]
One year or less	$ 21,332
After one year to two years	18,083
After two years to three years	16,762
After three years to four years	15,882
After four years to five years	14,476
After five years	109,752
Total minimum lease payments	$ 196,287

Premises, Furniture, and Equi64

Premises, Furniture, and Equipment (Details) - Accretion of Operating Leases $ in Thousands	Sep. 30, 2016USD ($)
Property, Plant and Equipment [Abstract]
One year or less	$ 1,180
After one year to two years	1,011
After two years to three years	742
After three years to four years	648
After four years to five years	648
After five years	4,159
Total accretion	$ 8,388

Premises, Furniture, and Equi65

Premises, Furniture, and Equipment (Details) - Rental Expense - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Property, Plant and Equipment [Abstract]
Lease expense charged to operations	[1]	$ 1,950	$ 1,438	$ 4,902	$ 4,282
Rental income from premises leased to others	[2]	118	167	404	454
Net operating lease expense		1,832	1,271	4,498	3,828
Accretion of below market lease		$ 295	$ 286	$ 876	$ 858
[1]	Includes amounts paid under short-term cancelable leases and is included in net occupancy and equipment expense in the Condensed Consolidated Statements of Income. For the quarter and nine months ended September 30, 2016, lease expense is net of accretion related to the intangible liability of $295,000 and $876,000, respectively. For the same periods in 2015, lease expense is net of accretion related to the intangible liability of $286,000 and $858,000.
[2]	Included as a reduction to net occupancy and equipment expense in the Condensed Consolidated Statements of Income.

Borrowed Funds (Details) - Summ

Borrowed Funds (Details) - Summary of Borrowed Funds - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Debt Disclosure [Abstract]
Securities sold under agreements to repurchase	$ 114,539	$ 155,196
FHLB advances	525,000	9,900
Total borrowed funds	$ 639,539	$ 165,096

Borrowed Funds (Details) - Narr

Borrowed Funds (Details) - Narrative	9 Months Ended
	Sep. 30, 2016USD ($)
Short-term Debt [Line Items]
Line of credit maximum borrowing capacity	$ 50,000,000
Line of credit unused facility fee	0.35%
Line of credit amount outstanding	$ 0
Minimum
Short-term Debt [Line Items]
FHLB fixed interest rate	0.40%
Maximum
Short-term Debt [Line Items]
FHLB fixed interest rate	0.48%
FHLB Advances | Weighted Average
Short-term Debt [Line Items]
FHLB advance maturity date, start	Oct. 3, 2016
FHLB advance maturity date, end	Dec. 1, 2016
One-Month LIBOR Plus 1.75%
Short-term Debt [Line Items]
Line of credit interest rate spread	1.75%

Senior and Subordinated Debt (D

Senior and Subordinated Debt (Details) - USD ($) $ in Thousands		9 Months Ended	12 Months Ended
		Sep. 30, 2016	Dec. 31, 2015	Sep. 29, 2016	Apr. 01, 2016
Debt Instrument [Line Items]
Senior notes		$ 114,983	$ 114,891
Subordinated notes		146,484	38,499
Total junior subordinated debentures		47,977	47,818
Senior and subordinated debt		$ 309,444	$ 201,208
Senior notes
Debt Instrument [Line Items]
Issuance Date		Nov. 22, 2011
Maturity Date		Nov. 22, 2016
Interest Rate		5.875%	5.875%
Maturing long-term debt		$ 115,000
Subordinated notes due in 2026
Debt Instrument [Line Items]
Issuance Date		Sep. 29, 2016
Maturity Date		Sep. 29, 2026
Interest Rate		5.875%		5.875%
Proceeds from Issuance of Debt		$ 146,484
Debt Instrument, Face Amount				$ 150,000
Subordinated notes		$ 146,484	$ 0
Subordinated notes due in 2016
Debt Instrument [Line Items]
Issuance Date		Mar. 1, 2006
Maturity Date		Apr. 1, 2016
Interest Rate			5.85%		5.85%
Subordinated notes		$ 0	$ 38,499		$ 38,500
Junior Subordinated Debentures, First Midwest Capital Trust I | First Midwest Capital Trust I (FMCT)
Debt Instrument [Line Items]
Issuance Date		Nov. 11, 2003
Maturity Date		Dec. 1, 2033
Interest Rate		6.95%	6.95%
Total junior subordinated debentures		$ 37,800	$ 37,799
Junior Subordinated Debentures, Great Lakes Statutory Trust II | Great Lakes Statutory Trust II (GLST II)
Debt Disclosure [Abstract]
Debt Instrument, Unamortized Discount		$ 1,800	$ 1,900
Debt Instrument [Line Items]
Issuance Date	[1]	Dec. 15, 2005
Maturity Date	[1]	Dec. 15, 2035
Basis Spread on Variable Rate	[1],[2]	1.40%	1.40%
Total junior subordinated debentures	[1]	$ 4,367	$ 4,296
Junior Subordinated Debentures, Great Lakes Statutory Trust III | Great Lakes Statutory Trust III (GLST III)
Debt Disclosure [Abstract]
Debt Instrument, Unamortized Discount		$ 2,400	$ 2,500
Debt Instrument [Line Items]
Issuance Date	[1]	Jun. 21, 2007
Maturity Date	[1]	Sep. 21, 2037
Basis Spread on Variable Rate	[1],[2]	1.70%	1.70%
Total junior subordinated debentures	[1]	$ 5,810	$ 5,723
[1]	The junior subordinated debentures related to GLST II and GLST III were assumed by the Company during 2014 through the acquisition of Great Lakes Financial Resources, Inc., the holding company for Great Lakes Bank. These amounts include acquisition adjustments which resulted in a discount of $1.8 million to GLST II and $2.4 million to GLST III as of September 30, 2016 and $1.9 million to GLST II and $2.5 million to GLST III as of December 31, 2015.
[2]	The interest rates are a variable rate based on the three-month LIBOR plus 1.400% and 1.700% for GLST II and GLST III, respectively.

Senior and Subordinated Debt Se

Senior and Subordinated Debt Senior and Subordinated Debt (Details) - Narrative (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 29, 2016	Apr. 01, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Subordinated notes	$ 146,484			$ 38,499
Subordinated notes due in 2016
Debt Instrument [Line Items]
Subordinated notes	$ 0		$ 38,500	$ 38,499
Interest Rate			5.85%	5.85%
Senior notes
Debt Instrument [Line Items]
Interest Rate	5.875%			5.875%
Maturing long-term debt	$ 115,000
Subordinated notes due in 2026
Debt Instrument [Line Items]
Subordinated notes	$ 146,484			$ 0
Interest Rate	5.875%	5.875%
Proceeds from Issuance of Debt	$ 146,484
Great Lakes Statutory Trust II (GLST II) | Junior Subordinated Debentures, Great Lakes Statutory Trust II
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount	1,800			1,900
Great Lakes Statutory Trust III (GLST III) | Junior Subordinated Debentures, Great Lakes Statutory Trust III
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount	$ 2,400			$ 2,500

Earnings Per Common Share (Deta

Earnings Per Common Share (Details) - Basic and Diluted Earnings Per Common Share - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share [Abstract]
Net income		$ 28,402	$ 23,284	$ 71,631	$ 65,740
Net income applicable to non-vested restricted shares		(324)	(226)	(826)	(703)
Net income applicable to common shares		$ 28,078	$ 23,058	$ 70,805	$ 65,037
Weighted-average common shares outstanding (basic) (in Shares)		80,396	77,106	79,589	77,038
Dilutive effect of common stock equivalents (in Shares)		13	13	13	13
Weighted-average diluted common shares outstanding (in Shares)		80,409	77,119	79,602	77,051
Basic EPS (in Dollars per share)		$ 0.35	$ 0.30	$ 0.89	$ 0.84
Diluted EPS (in Dollars per share)		$ 0.35	$ 0.30	$ 0.89	$ 0.84
Anti-dilutive shares not included in the computation of diluted EPS (in Shares)	[1]	454	751	510	822
[1]	This amount represents outstanding stock options for which the exercise price is greater than the average market price of the Company's common stock.

Derivative Instruments and He71

Derivative Instruments and Hedging Activities (Details) - Fair Value Hedges - Fair Value Hedging - USD ($) $ in Thousands		9 Months Ended	12 Months Ended
		Sep. 30, 2016	Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross notional amount outstanding		$ 10,710	$ 11,620
Derivative liability fair value		$ (399)	$ (643)
Weighted-average interest rate received		2.44%	2.25%
Weighted-average interest rate paid		6.35%	6.36%
Weighted-average maturity (in years)		1 year 2 months 28 days	1 year 11 months 18 days
Fair value of derivative	[1]	$ 418	$ 665
[1]	This amount represents the fair value if credit risk related contingent features were triggered.

Derivative Instruments and He72

Derivative Instruments and Hedging Activities (Details) - Narrative - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative notional amount, cash flow hedge, received fixed pay variable interest rate swap	$ 710		$ 710
Derivative notional amount, cash flow hedge, forward starting interest rate swap	710		710
Derivative notional amount of cash flow hedge received, variable pay fixed interest rate swap	325		325
Interest rate cash flow hedge gain (loss) to be reclassified during the next 12 months, net	3.7		3.7
Derivative transaction fees	$ 2.9	$ 1.2	$ 8.2	$ 2.7
Portion of fair value of outstanding interest rate swaps covered by collateral agreements (percent)	100.00%		100.00%		100.00%

Derivative Instruments and He73

Derivative Instruments and Hedging Activities (Details) - Cash Flow Hedges - Cash Flow Hedging - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross notional amount outstanding	$ 1,420,000,000	$ 1,220,000,000
Derivative asset fair value	15,093,000	4,787,000
Derivative liability fair value	$ (14,836,000)	$ (8,950,000)
Weighted-average interest rate received	1.32%	1.24%
Weighted-average interest rate paid	1.04%	0.75%
Weighted-average maturity (in years)	3 years 15 days	3 years 10 months 28 days

Derivative Instruments and He74

Derivative Instruments and Hedging Activities (Details) - Other Derivative Instruments - Other Derivative Instruments - USD ($) $ in Thousands		Sep. 30, 2016	Dec. 31, 2015
Derivative [Line Items]
Gross notional amount outstanding		$ 1,462,702	$ 853,385
Derivative asset fair value		29,835	11,446
Derivative liability fair value		(29,835)	(11,446)
Fair value of derivative	[1]	$ 30,451	$ 11,939
[1]	This amount represents the fair value if credit risk related contingent features were triggered.

Derivative Instruments and He75

Derivative Instruments and Hedging Activities (Details) - Offsetting Derivatives - USD ($) $ in Thousands		Sep. 30, 2016	Dec. 31, 2015
Assets
Gross amounts recognized		$ 44,928	$ 16,233
Less: amounts offset in the Consolidated Statements of Financial Condition		0	0
Net amount presented in the Consolidated Statements of Financial Condition	[1]	44,928	16,233
Offsetting derivative positions		(15,245)	(4,791)
Cash collateral pledged		0	0
Derivative Asset, Net credit exposure		29,683	11,442
Liabilities
Gross amounts recognized		45,070	21,039
Less: amounts offset in the Consolidated Statements of Financial Condition		0	0
Net amount presented in the Consolidated Statements of Financial Condition	[1]	45,070	21,039
Offsetting derivative positions		(15,245)	(4,791)
Cash collateral pledged		(29,825)	(16,248)
Derivative Liability, Net credit exposure		$ 0	$ 0
[1]	Included in other assets or other liabilities in the Consolidated Statements of Financial Condition.

Commitments, Guarantees, and 76

Commitments, Guarantees, and Contingent Liabilities (Details) - USD ($) $ in Thousands		Sep. 30, 2016	Dec. 31, 2015
Other Commitments [Line Items]
Letters of credit		$ 107,461	$ 100,610
Recourse on assets sold:
Unpaid principal balance of loans sold		187,891	196,389
Carrying value of recourse obligation	[1]	125	87
Commitments to extend credit
Other Commitments [Line Items]
Commercial, industrial, and agricultural		1,462,813	1,303,056
Commercial real estate		439,518	366,250
Home equity		387,194	352,114
Other commitments	[2]	215,226	203,121
Total commitments to extend credit		$ 2,504,751	$ 2,224,541
[1]	Included in other liabilities in the Consolidated Statements of Financial Condition.
[2]	Other commitments includes installment and overdraft protection program commitments.

Fair Value (Details) - Fair Val

Fair Value (Details) - Fair Value Measurements - USD ($) $ in Thousands		Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Trading securities:
Total trading securities		$ 18,351		$ 16,894
Securities Available-for-Sale
Securities available-for-sale, at fair value		1,964,030		1,306,636
Mortgage servicing rights (MSRs)		5,076	$ 4,938	1,853	$ 1,798	$ 1,820	$ 1,728
U.S. treasury securities
Securities Available-for-Sale
Securities available-for-sale, at fair value		43,797		16,980
U.S. agency securities
Securities Available-for-Sale
Securities available-for-sale, at fair value		192,931		86,643
MBSs
Securities Available-for-Sale
Securities available-for-sale, at fair value		324,484		153,530
Municipal securities
Securities Available-for-Sale
Securities available-for-sale, at fair value		286,713		327,570
CDOs
Securities Available-for-Sale
Securities available-for-sale, at fair value		31,899		31,529
Equity securities
Securities Available-for-Sale
Securities available-for-sale, at fair value		2,947		3,199
Recurring | Level 1
Trading securities:
Money market funds		1,707		2,530
Mutual funds		16,644		14,364
Total trading securities		18,351		16,894
Securities Available-for-Sale
Securities available-for-sale, at fair value		43,797		16,980
Mortgage servicing rights (MSRs)	[1]	0		0
Derivative assets	[1]	0		0
Liabilities:
Derivative liabilities	[2]	0		0
Recurring | Level 1 | U.S. treasury securities
Securities Available-for-Sale
Securities available-for-sale, at fair value		43,797		16,980
Recurring | Level 1 | U.S. agency securities
Securities Available-for-Sale
Securities available-for-sale, at fair value		0		0
Recurring | Level 1 | CMOs
Securities Available-for-Sale
Securities available-for-sale, at fair value		0		0
Recurring | Level 1 | MBSs
Securities Available-for-Sale
Securities available-for-sale, at fair value		0		0
Recurring | Level 1 | Municipal securities
Securities Available-for-Sale
Securities available-for-sale, at fair value		0		0
Recurring | Level 1 | CDOs
Securities Available-for-Sale
Securities available-for-sale, at fair value		0		0
Recurring | Level 1 | Equity securities
Securities Available-for-Sale
Securities available-for-sale, at fair value		0		0
Recurring | Level 2
Trading securities:
Money market funds		0		0
Mutual funds		0		0
Total trading securities		0		0
Securities Available-for-Sale
Securities available-for-sale, at fair value		1,888,334		1,258,127
Mortgage servicing rights (MSRs)	[1]	0		0
Derivative assets	[1]	44,928		16,233
Liabilities:
Derivative liabilities	[2]	45,070		21,039
Recurring | Level 2 | U.S. treasury securities
Securities Available-for-Sale
Securities available-for-sale, at fair value		0		0
Recurring | Level 2 | U.S. agency securities
Securities Available-for-Sale
Securities available-for-sale, at fair value		192,931		86,643
Recurring | Level 2 | CMOs
Securities Available-for-Sale
Securities available-for-sale, at fair value		1,081,259		687,185
Recurring | Level 2 | MBSs
Securities Available-for-Sale
Securities available-for-sale, at fair value		324,484		153,530
Recurring | Level 2 | Municipal securities
Securities Available-for-Sale
Securities available-for-sale, at fair value		286,713		327,570
Recurring | Level 2 | CDOs
Securities Available-for-Sale
Securities available-for-sale, at fair value		0		0
Recurring | Level 2 | Equity securities
Securities Available-for-Sale
Securities available-for-sale, at fair value		2,947		3,199
Recurring | Level 3
Trading securities:
Money market funds		0		0
Mutual funds		0		0
Total trading securities		0		0
Securities Available-for-Sale
Securities available-for-sale, at fair value		31,899		31,529
Mortgage servicing rights (MSRs)	[1]	5,076		1,853
Derivative assets	[1]	0		0
Liabilities:
Derivative liabilities	[2]	0		0
Recurring | Level 3 | U.S. treasury securities
Securities Available-for-Sale
Securities available-for-sale, at fair value		0		0
Recurring | Level 3 | U.S. agency securities
Securities Available-for-Sale
Securities available-for-sale, at fair value		0		0
Recurring | Level 3 | CMOs
Securities Available-for-Sale
Securities available-for-sale, at fair value		0		0
Recurring | Level 3 | MBSs
Securities Available-for-Sale
Securities available-for-sale, at fair value		0		0
Recurring | Level 3 | Municipal securities
Securities Available-for-Sale
Securities available-for-sale, at fair value		0		0
Recurring | Level 3 | CDOs
Securities Available-for-Sale
Securities available-for-sale, at fair value		31,899		31,529
Recurring | Level 3 | Equity securities
Securities Available-for-Sale
Securities available-for-sale, at fair value		$ 0		$ 0
[1]	Included in other assets in the Consolidated Statements of Financial Condition.
[2]	Included in other liabilities in the Consolidated Statements of Financial Condition.

Fair Value (Details) - Unobserv

Fair Value (Details) - Unobservable Inputs Used In The Valuation of CDOs - CDOs	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Minimum
Fair Value (Details) - Assets Measured At Fair Value On A Non-Recurring Basis [Line Items]
Probability of prepayment	1.80%	1.80%
Probability of default	17.40%	19.10%
Loss given default	93.10%	93.80%
Probability of deferral cure	17.30%	15.20%
Maximum
Fair Value (Details) - Assets Measured At Fair Value On A Non-Recurring Basis [Line Items]
Probability of prepayment	15.00%	15.10%
Probability of default	49.00%	32.60%
Loss given default	98.50%	97.10%
Probability of deferral cure	100.00%	63.10%

Fair Value (Details) - Carrying

Fair Value (Details) - Carrying Value of Level 3 Securities Available-for-Sale - CDOs - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Rollforward of the Carrying Value of CDOs [Roll Forward]
Beginning balance		$ 30,431	$ 32,004	$ 31,529	$ 33,774
Change in other comprehensive income	[1]	1,794	(62)	764	(1,560)
Paydowns		(326)	(72)	(394)	(344)
Ending balance		$ 31,899	$ 31,870	$ 31,899	$ 31,870
[1]	Included in unrealized holding gains in the Consolidated Statements of Comprehensive Income.

Fair Value (Details) - Narrativ

Fair Value (Details) - Narrative - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Fair Value (Details) [Line Items]
Total amount of loans being serviced for the benefit of others at the end of the period	$ 630.7	$ 242.9
Loans serviced for others	$ 318.5
Minimum
Fair Value (Details) [Line Items]
Appraisal adjustment (percent)	0.00%
Maximum
Fair Value (Details) [Line Items]
Appraisal adjustment (percent)	15.00%

Fair Value (Details) - Signific

Fair Value (Details) - Significant Unobservable Inputs Used In the Valuation of MSRs	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Minimum
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Prepayment speed	10.20%	10.10%
Maturity (months)	12 months	6 months
Discount rate	9.50%	9.50%
Maximum
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Prepayment speed	29.20%	20.90%
Maturity (months)	80 months	86 months
Discount rate	13.00%	13.00%

Fair Value (Details) - Carryi82

Fair Value (Details) - Carrying Value of Mortgage Servicing Rights - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Servicing Asset at Fair Value, Amount [Roll Forward]
Beginning balance		$ 4,938	$ 1,820	$ 1,853	$ 1,728
Additions from acquisition		0	0	3,092	0
New MSRs		581	60	928	303
(Losses) gains included in earnings:
Changes in valuation inputs and assumptions	[1]	(205)	(12)	(377)	(51)
Other changes in fair value	[1],[2]	(238)	(70)	(420)	(182)
Ending balance		5,076	1,798	5,076	1,798
Contractual servicing fees earned	[1]	$ 373	$ 136	$ 922	$ 404
[1]	Included in mortgage banking income in the Condensed Consolidated Statements of Income and related to assets held as of September 30, 2016 and 2015.
[2]	Primarily represents changes in expected future cash flows due to payoffs and paydowns.

Fair Value (Details) - Assets M

Fair Value (Details) - Assets Measured At Fair Value On A Non-Recurring Basis - USD ($) $ in Thousands		Sep. 30, 2016	Dec. 31, 2015
Fair Value (Details) - Assets Measured At Fair Value On A Non-Recurring Basis [Line Items]
OREO		$ 28,049	$ 27,782
Level 1 | Nonrecurring
Fair Value (Details) - Assets Measured At Fair Value On A Non-Recurring Basis [Line Items]
Collateral-dependent impaired loans	[1]	0	0
OREO	[2]	0	0
Loans held-for-sale	[3]	0	0
Assets held-for-sale	[4]	0	0
Level 2 | Nonrecurring
Fair Value (Details) - Assets Measured At Fair Value On A Non-Recurring Basis [Line Items]
Collateral-dependent impaired loans	[1]	0	0
OREO	[2]	0	0
Loans held-for-sale	[3]	0	0
Assets held-for-sale	[4]	0	0
Level 3 | Nonrecurring
Fair Value (Details) - Assets Measured At Fair Value On A Non-Recurring Basis [Line Items]
Collateral-dependent impaired loans	[1]	10,156	10,519
OREO	[2]	4,090	8,581
Loans held-for-sale	[3]	29,645	14,444
Assets held-for-sale	[4]	$ 4,967	$ 7,428
[1]	Includes impaired loans with charge-offs and impaired loans with a specific reserve during the periods presented.
[2]	Includes OREO with fair value adjustments subsequent to initial transfer that occurred during the periods presented.
[3]	Included in other assets in the Consolidated Statements of Financial Condition.
[4]	Included in premises, furniture, and equipment in the Consolidated Statements of Financial Condition.

Fair Value (Details) - Financia

Fair Value (Details) - Financial Instruments - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Assets:
Cash and due from banks	$ 139,538	$ 114,587
Interest-bearing deposits in other banks	362,153	266,615
Securities held-to-maturity, at amortized cost	20,337	23,152
FHLB and FRB stock	53,506	39,306
Loans	8,086,474	7,088,085
Investment in BOLI	219,064	209,601
Liabilities:
Deposits	9,106,104	8,097,738
Borrowed funds	639,539	165,096
Senior and subordinated debt	309,444	201,208
Level 1
Assets:
Cash and due from banks	139,538	114,587
Liabilities:
Senior and subordinated debt	317,948	205,726
Level 2
Assets:
Interest-bearing deposits in other banks	362,153	266,615
Securities held-to-maturity, at amortized cost	18,110	20,054
FHLB and FRB stock	53,506	39,306
Liabilities:
Deposits	9,104,564	8,093,640
Borrowed funds	639,539	165,096
Accrued interest payable	4,856	2,175
Level 3
Assets:
Loans	7,997,227	6,959,024
Investment in BOLI	219,064	209,601
Accrued interest receivable	33,931	27,847
Other interest-earning assets	1,056	1,982
Carrying Amount | Level 1
Assets:
Cash and due from banks	139,538	114,587
Liabilities:
Senior and subordinated debt	309,444	201,208
Carrying Amount | Level 2
Assets:
Interest-bearing deposits in other banks	362,153	266,615
Securities held-to-maturity, at amortized cost	20,337	23,152
FHLB and FRB stock	53,506	39,306
Liabilities:
Deposits	9,106,104	8,097,738
Borrowed funds	639,539	165,096
Accrued interest payable	4,856	2,175
Carrying Amount | Level 3
Assets:
Loans	8,091,306	7,091,988
Investment in BOLI	219,064	209,601
Accrued interest receivable	33,931	27,847
Other interest-earning assets	$ 1,056	$ 1,982