First Midwest Bancorp (ONBPP) 10-Q 10 May 17 2017 Q1 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2017	May 05, 2017
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		112,345,301
Amendment Flag	false
Entity Central Index Key	702,325
Entity Filer Category	Large Accelerated Filer
Document Period End Date	Mar. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q1

Consolidated Statements of Fina

Consolidated Statements of Financial Condition - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Assets
Cash and due from banks	$ 174,268	$ 155,055
Interest-bearing deposits in other banks	74,892	107,093
Trading securities, at fair value	19,130	17,920
Securities available-for-sale, at fair value	1,937,124	1,919,450
Securities held-to-maturity, at amortized cost	17,742	22,291
Federal Home Loan Bank (FHLB) and Federal Reserve Bank (FRB) stock, at cost	46,306	59,131
Loans	10,054,370	8,254,145
Allowance for loan losses	(88,163)	(86,083)
Net loans	9,966,207	8,168,062
Other real estate owned (OREO)	29,140	26,083
Premises, furniture, and equipment, net	140,653	82,577
Investment in bank-owned life insurance (BOLI)	276,960	219,746
Goodwill and other intangible assets	754,621	366,876
Accrued interest receivable and other assets	336,428	278,271
Total assets	13,773,471	11,422,555
Liabilities
Noninterest-bearing deposits	3,492,987	2,766,748
Interest-bearing deposits	7,463,554	6,061,855
Total deposits	10,956,541	8,828,603
Borrowed funds	547,923	879,008
Senior and subordinated debt	194,745	194,603
Accrued interest payable and other liabilities	269,529	263,261
Total liabilities	11,968,738	10,165,475
Stockholders' Equity
Common stock	1,123	913
Additional paid-in capital	1,022,417	498,937
Retained earnings	1,030,403	1,016,674
Accumulated other comprehensive loss, net of tax	(40,264)	(40,910)
Treasury stock, at cost	(208,946)	(218,534)
Total stockholders' equity	1,804,733	1,257,080
Total liabilities and stockholders' equity	$ 13,773,471	$ 11,422,555
Stockholders' Equity, Number of Shares, Par Value, and Other Disclosures
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,000,000	1,000,000
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	112,343,000	91,284,000
Common stock, shares outstanding	102,757,000	81,325,000
Treasury stock, shares	9,586,000	9,959,000

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Interest Income
Loans	$ 112,365	$ 78,455
Investment securities	10,484	8,558
Other short-term investments	850	535
Total interest income	123,699	87,548
Interest Expense
Deposits	3,209	2,385
Borrowed funds	2,194	1,316
Senior and subordinated debt	3,099	3,133
Total interest expense	8,502	6,834
Net interest income	115,197	80,714
Provision for loan losses	4,918	7,593
Net interest income after provision for loan losses	110,279	73,121
Noninterest Income
Service charges on deposit accounts	11,365	9,473
Wealth management fees	9,660	7,559
Card-based fees	8,116	6,718
Mortgage banking income	1,888	1,368
Capital market products income	1,376	3,215
Other service charges, commissions, and fees	5,442	5,261
Net securities gains	0	887
Other income	2,104	1,445
Total noninterest income	39,951	35,926
Noninterest Expense
Salaries and employee benefits	55,772	44,594
Net occupancy and equipment expense	12,325	9,697
Professional services	8,463	5,920
Technology and related costs	4,433	3,701
Net OREO expense	1,700	664
Other expenses	15,384	12,993
Acquisition and integration related expenses	18,565	5,020
Total noninterest expense	116,642	82,589
Income before income tax expense	33,588	26,458
Income tax expense	10,733	8,496
Net income	$ 22,855	$ 17,962
Per Common Share Data
Basic earnings per common share (in Dollars per share)	$ 0.23	$ 0.23
Diluted earnings per common share (in Dollars per share)	0.23	0.23
Dividends declared per common share (in dollars per share)	$ 0.09	$ 0.09
Weighted-average common shares outstanding (in Shares)	100,411	77,980
Weighted-average diluted common shares outstanding (in Shares)	100,432	77,992

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 22,855	$ 17,962
Unrealized holding gains:
Before tax	3,298	18,873
Tax effect	(1,321)	(7,546)
Net of tax	1,977	11,327
Reclassification of net gains included in net income:
Before tax	0	887
Tax effect	0	(355)
Net of tax	0	532
Net unrealized holding gains	1,977	10,795
Derivative Instruments
Before tax	(2,220)	4,275
Tax effect	889	(1,722)
Net of tax	(1,331)	2,553
Total other comprehensive income	646	13,348
Total comprehensive income	$ 23,501	$ 31,310

Consolidated Statements of Com5

Consolidated Statements of Comprehensive Income - AOCI - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Other comprehensive income	$ 646	$ 13,348
Accumulated Unrealized Gain (Loss) on Securities Available- for-Sale
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(22,645)	(10,271)
Other comprehensive income	1,977	10,795
Ending balance	(20,668)	524
Accumulated Unrealized Gain (Loss) on Derivative Instruments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(1,176)	(2,468)
Other comprehensive income	(1,331)	2,553
Ending balance	(2,507)	85
Unrecognized Net Pension Costs
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(17,089)	(15,650)
Other comprehensive income	0	0
Ending balance	(17,089)	(15,650)
Total Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(40,910)	(28,389)
Other comprehensive income	646	13,348
Ending balance	$ (40,264)	$ (15,041)

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, 2015	$ 1,146,268	$ 882	$ 446,672	$ 953,516	$ (28,389)	$ (226,413)
Balance Beginning (in Shares) at Dec. 31, 2015		77,952
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	17,962			17,962
Other comprehensive income	13,348				13,348
Common dividends declared ($0.09 per common share)	(7,228)			(7,228)
Acquisitions, net of issuance costs	54,896	$ 31	54,865
Acquisitions, net of issuance costs (in Shares)		3,042
Common stock issued	59		59
Common stock issued (in Shares)		4
Restricted stock activity	(2,546)		(10,282)			7,736
Restricted stock activity (in Shares)		303
Treasury stock issued to benefit plans	(33)					(33)
Treasury stock issued to benefit plans (in Shares)		(3)
Share-based compensation expense	1,839		1,839
Balance Ending at Mar. 31, 2016	1,224,565	$ 913	493,153	964,250	(15,041)	(218,710)
Balance Ending (in Shares) at Mar. 31, 2016		81,298
Balance Beginning at Dec. 31, 2016	$ 1,257,080	$ 913	498,937	1,016,674	(40,910)	(218,534)
Balance Beginning (in Shares) at Dec. 31, 2016	81,325	81,325
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 22,855			22,855
Other comprehensive income	646				646
Common dividends declared ($0.09 per common share)	(9,126)			(9,126)
Acquisitions, net of issuance costs	534,090	$ 210	533,322			558
Acquisitions, net of issuance costs (in Shares)		21,078
Common stock issued	53		53
Common stock issued (in Shares)		2
Restricted stock activity	(3,752)		(12,860)			9,108
Restricted stock activity (in Shares)		355
Treasury stock issued to benefit plans	(78)					(78)
Treasury stock issued to benefit plans (in Shares)		(3)
Share-based compensation expense	2,965		2,965
Balance Ending at Mar. 31, 2017	$ 1,804,733	$ 1,123	$ 1,022,417	$ 1,030,403	$ (40,264)	$ (208,946)
Balance Ending (in Shares) at Mar. 31, 2017	102,757	102,757

Consolidated Statements of Cha7

Consolidated Statements of Changes In Stockholders' Equity (Parentheticals) - $ / shares	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Stockholders' Equity [Abstract]
Dividends declared per common share (in dollars per share)	$ 0.09	$ 0.09

Condensed Consolidated Stateme8

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Cash Flows [Abstract]
Net cash provided by operating activities	$ 8,201	$ 10,232
Investing Activities
Proceeds from maturities, repayments, and calls of securities available-for-sale	80,060	68,235
Proceeds from sales of securities available-for-sale	210,154	31,453
Purchases of securities available-for-sale	(94,766)	(276,265)
Proceeds from maturities, repayments, and calls of securities held-to-maturity	4,549	3,973
Purchases of securities held-to-maturity	0	(8)
Purchases (sales) of FHLB stock	16,072	(61)
Net increase in loans	(43,771)	(268,179)
Proceeds from claims on BOLI, net of premiums paid	(24)	(22)
Proceeds from sales of OREO	5,364	1,640
Proceeds from sales of premises, furniture, and equipment	404	675
Purchases of premises, furniture, and equipment	(2,891)	(2,921)
Net cash received from acquisitions	41,717	57,347
Net cash provided by (used in) investing activities	216,868	(384,133)
Financing Activities
Net increase in deposit accounts	104,064	88,159
Net (decrease) increase in borrowed funds	(331,085)	219,899
Cash dividends paid	(7,206)	(6,885)
Restricted stock activity	(3,830)	(2,113)
Net cash (used in) provided by financing activities	(238,057)	299,060
Net decrease in cash and cash equivalents	(12,988)	(74,841)
Cash and cash equivalents at beginning of period	262,148	381,202
Cash and cash equivalents at end of period	249,160	306,361
Supplemental Disclosures of Cash Flow Information:
Income taxes (refunded) paid	(1,259)	2,421
Interest paid to depositors and creditors	9,354	3,563
Dividends declared, but unpaid	9,163	7,593
Acquisitions, net of issuance costs	534,090	54,896
Non-cash transfers of loans to OREO	683	942
Non-cash transfers of loans held-for-investment to loans held-for-sale	$ 13,136	$ 25,125

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2017
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 ended March 31, 2017 are not necessarily indicative of the results that may be expected for the year ending December 31, 2017 . 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 2016 Annual Report on Form 10-K (" 2016 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 2016 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. During 2015, certain covered loans were no longer covered under the FDIC Agreements, and are included in acquired loans and no longer classified as covered loans. 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 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 generally 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 collateral 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	3 Months Ended
	Mar. 31, 2017
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recent Accounting Pronouncements	RECENT ACCOUNTING PRONOUNCEMENTS Adopted Accounting Pronouncements Contingent Put and Call Options in Debt Instruments: In March of 2016, the Financial Accounting Standards Board ("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. The adoption of this guidance on January 1, 2017 did not 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. The adoption of this guidance on January 1, 2017 did not 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. The adoption of this guidance on January 1, 2017 resulted in a $638,000 tax benefit recorded in the Company's results of operations. The Company elected to estimate forfeitures, which is consistent with the Company's practice before the adoption of this guidance. 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 but was deferred to 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. The Company's revenue is comprised of net interest income on financial assets and liabilities, which are excluded from the scope of this guidance, and noninterest income. The Company expects that this guidance will change how revenue from certain revenue streams is recognized within wealth management fees but does not expect these changes to have a significant impact on the Company's financial condition, results of operations, or liquidity. The Company continues to evaluate the impact of this guidance on other components of noninterest income. The Company will adopt this guidance on January 1, 2018, with a cumulative effect adjustment to opening retained earnings, if an adjustment is deemed to be significant. 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 2016, the Company entered into a sale-leaseback transaction that resulted in a deferred gain of $82.5 million , with $79.5 million remaining as of March 31, 2017 . 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. 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. Income Taxes: In October of 2016, the FASB issued guidance that requires an entity to recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. 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. Clarifying the Definition of a Business: In January of 2017, the FASB issued guidance that clarifies the definition of a business to assist entities with evaluating whether transactions should be accounted for as acquisitions or disposals of assets or businesses. 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. Accounting for Goodwill Impairment: In January of 2017, the FASB issued guidance that simplifies the accounting for goodwill impairment for all entities. The new guidance eliminates the requirement to calculate the implied fair value of goodwill using the second step of the quantitative two-step goodwill impairment model prescribed under current accounting guidance. Under the new guidance, if a reporting unit's carrying amount exceeds its fair value, an entity will record an impairment charge based on that difference. This guidance is effective for annual and interim goodwill impairment testing dates beginning after December 15, 2019. Early adoption is permitted for annual and interim goodwill impairment testing dates after January 1, 2017. Management does not expect the adoption of this guidance will materially impact the Company's financial condition, results of operations, or liquidity. Presentation of Defined Benefit Retirement Plan Costs: In March of 2017, the FASB issued guidance that changes how employers that sponsor defined pension and or other postretirement benefit plans present the net periodic benefit cost in the income statement. Employers will present the service cost component of net periodic benefit cost in the same income statement line item as other employee compensation costs arising from services rendered during the period. Other components of net periodic benefit cost will be presented separately from the line item(s) that includes the service cost. 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. Premium Amortization on Purchased Callable Debt Securities: In March of 2017, the FASB issued guidance that shortens the amortization period for the premium on certain purchased callable debt securities to the earliest call date. This guidance is effective for annual and interim periods beginning after December 15, 2018. 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.

Acquisitions

Acquisitions	3 Months Ended
	Mar. 31, 2017
Business Combinations [Abstract]
Acquisitions	ACQUISITIONS Completed Acquisitions Standard Bancshares, Inc. On January 6, 2017, the Company completed the acquisition of Standard Bancshares, Inc. (" Standard "), the holding company for Standard Bank and Trust Company. Pursuant to the terms of the merger agreement, on January 6, 2017, each outstanding share of Standard common stock was canceled and converted into the right to receive 0.4350 of a share of Company common stock. Based on the closing trading price of shares of Company common stock on the NASDAQ on that date of $25.34 , the value of the merger consideration per share of Standard common stock was $11.02 . Each outstanding Standard stock settled right was redeemed for cash, and each outstanding Standard stock option and each share of Standard phantom stock was cancelled and terminated in exchange for the right to receive cash, in each case, pursuant to the terms of the merger agreement. This resulted in an overall transaction value of approximately $580.7 million , which consisted of 21,057,085 shares of Company common stock and $47.1 million in cash. Goodwill of $339.3 million associated with the acquisition was recorded by the Company. All operating systems were converted during the first quarter of 2017. The fair value adjustments associated with these accounts and goodwill remain preliminary and may change as the Company continues to finalize the fair value of the assets and liabilities acquired. Premier Asset Management LLC On February 28, 2017, the Company completed the acquisition of Premier Asset Management LLC ("Premier"), a registered investment advisor based in Chicago, Illinois. At the close of the acquisition, the Company acquired approximately $550.0 million of trust assets under management. 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 $22.2 million associated with the acquisition was recorded by the Company. During the first quarter of 2017, the Company finalized the fair value adjustments associated with the NI Bancshares transaction, which required a measurement period adjustment of $423,000 to increase goodwill. This adjustment was recognized in the current period in accordance with accounting guidance applicable to business combinations. The following table presents the assets acquired and liabilities assumed, net of the fair value adjustments, in the Standard and NI Bancshares 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) Standard NI Bancshares January 6, 2017 March 8, 2016 Assets Cash and due from banks and interest-bearing deposits in other banks $ 102,149 $ 72,533 Securities available-for-sale 214,107 125,843 Securities held-to-maturity — 1,864 FHLB and FRB stock 3,247 1,549 Loans 1,769,709 396,181 OREO 8,427 2,863 Investment in BOLI 55,629 8,384 Goodwill 339,298 22,174 Other intangible assets 31,072 10,408 Premises, furniture, and equipment 59,163 19,636 Accrued interest receivable and other assets 56,077 16,453 Total assets $ 2,638,878 $ 677,888 Liabilities Noninterest-bearing deposits $ 675,354 $ 130,909 Interest-bearing deposits 1,348,520 464,012 Total deposits 2,023,874 594,921 Borrowed funds — 2,416 Intangible liabilities — 230 Accrued interest payable and other liabilities 34,289 10,239 Total liabilities 2,058,163 607,806 Consideration Paid Common stock (2017 - 21,057,085 shares issued at $25.34 per share, 2016 - 3,042,494 shares issued at $18.059 per share), net of issuance costs 533,590 54,896 Cash paid 47,125 15,186 Total consideration paid 580,715 70,082 $ 2,638,878 $ 677,888 Expenses related to the acquisition and integration of the transactions above totaled $18.6 million and $5.0 million during the quarters ended March 31, 2017 and 2016 , respectively, and are reported as a separate component within noninterest expense in the Condensed Consolidated Statements of Income. The acquisition of Standard was considered material to the Company's financial statements; therefore, pro forma financial data and related disclosures are included in the following tables. The unaudited pro forma combined results of operations for the quarters ended March 31, 2017 and 2016 are presented as if the Standard acquisition had occurred on January 1, 2016, the first day of the Company's 2016 fiscal year. The unaudited pro forma combined results of operations are presented for illustrative purposes only and do not necessarily indicate the financial results of the combined companies had the companies actually been combined at the beginning of the period presented. Fair value adjustments included in the following table are preliminary and may be revised. The unaudited pro forma results of operations also does not consider any potential impacts of potential revenue enhancements, anticipated cost savings and expense efficiencies, or asset dispositions, among other factors. Acquisition and integration related expenses directly attributable to the Standard acquisition have been excluded from the following table and are estimated to total $27.0 million , of which $17.5 million was expensed during the quarter ended March 31, 2017. Unaudited Pro Forma Combined Results of Operations (Dollar amounts in thousands) Quarters Ended March 31, 2017 2016 Total revenues (1) $ 156,757 $ 143,345 Net income 32,734 22,950 (1) Includes net interest income and total noninterest income. Acquired loans are recorded at fair value, which incorporates credit risk, at the date of acquisition. No allowance for credit losses is recorded on the acquisition date. Acquired loans are separated into (i) non-PCI and (ii) 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. PCI loans are accounted for based on estimates of expected future cash flows. 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. For additional discussion regarding significant accounting policies on acquired loans see Note 1 , " Summary of Significant Accounting Policies ." The following table presents additional detail for loans acquired in the Standard transaction at the acquisition date. Standard Acquired Loans (Dollar amounts in thousands) January 6, 2017 PCI Loans Non-PCI Loans Fair value $ 123,643 $ 1,646,066 Contractually required principal and interest payments 208,586 1,940,459 Best estimate of contractual cash flows not expected to be collected (1) 57,626 100,918 Best estimate of contractual cash flows expected to be collected 150,960 1,839,541 (1) Includes interest payments not expected to be collected due to loan prepayments as well as principal and interest payments not expected to be collected due to customer default.

Securities

Securities	3 Months Ended
	Mar. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Securities	SECURITIES The significant accounting policies related to securities are presented in Note 1 , " Summary of Significant Accounting Policies " to the Consolidated Financial Statements in the Company 's 2016 10-K. 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 March 31, 2017 As of December 31, 2016 Amortized Cost Gross Unrealized Fair Value Amortized Cost Gross Unrealized Fair Value Gains Losses Gains Losses Securities Available-for-Sale U.S. treasury securities $ 48,574 $ 23 $ (81 ) $ 48,516 $ 48,581 $ 26 $ (66 ) $ 48,541 U.S. agency securities 180,894 518 (382 ) 181,030 183,528 519 (410 ) 183,637 Collateralized mortgage obligations ("CMOs") 1,066,439 1,039 (16,114 ) 1,051,364 1,064,130 969 (17,653 ) 1,047,446 Other mortgage-backed securities ("MBSs") 357,473 1,230 (5,737 ) 352,966 337,139 1,395 (5,879 ) 332,655 Municipal securities 263,606 2,092 (2,988 ) 262,710 273,319 1,245 (3,718 ) 270,846 Trust-preferred collateralized debt obligations ("CDOs") 47,728 260 (14,552 ) 33,436 47,681 261 (14,682 ) 33,260 Equity securities 7,246 148 (292 ) 7,102 3,206 147 (288 ) 3,065 Total securities available-for-sale $ 1,971,960 $ 5,310 $ (40,146 ) $ 1,937,124 $ 1,957,584 $ 4,562 $ (42,696 ) $ 1,919,450 Securities Held-to-Maturity Municipal securities $ 17,742 $ — $ (2,624 ) $ 15,118 $ 22,291 $ — $ (4,079 ) $ 18,212 Trading Securities $ 19,130 $ 17,920 Remaining Contractual Maturity of Securities (Dollar amounts in thousands) As of March 31, 2017 Available-for-Sale Held-to-Maturity Amortized Cost Fair Value Amortized Cost Fair Value One year or less $ 90,123 $ 87,605 $ 1,926 $ 1,641 After one year to five years 399,483 388,321 6,834 5,823 After five years to ten years 3,470 3,373 2,975 2,535 After ten years 47,726 46,393 6,007 5,119 Securities that do not have a single contractual maturity date 1,431,158 1,411,432 — — Total $ 1,971,960 $ 1,937,124 $ 17,742 $ 15,118 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 $1.1 billion for both March 31, 2017 and December 31, 2016 . No securities held-to-maturity were pledged as of March 31, 2017 or December 31, 2016 . During the quarters ended March 31, 2017 and 2016 there were no material gross trading gains/(losses). The following table presents net realized gains on securities available-for-sale for the quarters ended March 31, 2017 and 2016 . Securities Available-for-Sale Gains (Dollar amounts in thousands) Quarters Ended 2017 2016 Gains on sales of securities: Gross realized gains $ — $ 930 Gross realized losses — (43 ) Net realized gains on sales of securities — 887 Non-cash impairment charges: Other-than-temporary securities impairment ("OTTI") — — Net realized gains $ — $ 887 There were no net securities gains recognized during the first quarter of 2017 . Securities of $214.1 million were acquired in the Standard transaction during the first quarter of 2017, of which $210.2 million were sold shortly after the acquisition and resulted in no gains or losses as they were recorded at fair value upon acquisition. 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 ended March 31, 2017 and 2016 . 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 2017 2016 Beginning balance $ 23,345 $ 23,709 OTTI included in earnings (1) : Reduction for sales of securities — — Ending balance $ 23,345 $ 23,709 (1) Included in net securities gains in the Condensed Consolidated Statements of Income. The following table presents the aggregate amount of unrealized losses and the aggregate related fair values of securities with unrealized losses as of March 31, 2017 and December 31, 2016 . 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 March 31, 2017 Securities Available-for-Sale U.S. treasury securities 17 $ 35,481 $ 75 $ 3,995 $ 6 $ 39,476 $ 81 U.S. agency securities 30 70,426 358 6,928 24 77,354 382 CMOs 196 781,003 12,259 128,464 3,855 909,467 16,114 MBSs 73 290,278 5,180 17,013 557 307,291 5,737 Municipal securities 272 94,694 2,371 21,520 617 116,214 2,988 CDOs 7 — — 30,762 14,552 30,762 14,552 Equity securities 2 — — 6,687 292 6,687 292 Total 597 $ 1,271,882 $ 20,243 $ 215,369 $ 19,903 $ 1,487,251 $ 40,146 Securities Held-to-Maturity Municipal securities 13 $ — $ — $ 15,118 $ 2,624 $ 15,118 $ 2,624 As of December 31, 2016 Securities Available-for-Sale U.S. treasury securities 16 $ 33,505 $ 61 $ 3,995 $ 5 $ 37,500 $ 66 U.S. agency securities 28 62,064 364 11,814 46 73,878 410 CMOs 194 523,233 10,309 411,758 7,344 934,991 17,653 MBSs 68 221,174 4,726 77,780 1,154 298,954 5,880 Municipal securities 380 133,957 3,059 29,280 659 163,237 3,718 CDOs 7 — — 30,592 14,682 30,592 14,682 Equity securities 2 404 201 2,319 86 2,723 287 Total 695 $ 974,337 $ 18,720 $ 567,538 $ 23,976 $ 1,541,875 $ 42,696 Securities Held-to-Maturity Municipal securities 14 $ — $ — $ 18,212 $ 4,079 $ 18,212 $ 4,079 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 March 31, 2017 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 March 31, 2017 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	3 Months Ended
	Mar. 31, 2017
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 March 31, December 31, Commercial and industrial $ 3,370,780 $ 2,827,658 Agricultural 422,784 389,496 Commercial real estate: Office, retail, and industrial 1,988,979 1,581,967 Multi-family 671,710 614,052 Construction 568,460 451,540 Other commercial real estate 1,357,781 979,528 Total commercial real estate 4,586,930 3,627,087 Total corporate loans 8,380,494 6,844,241 Home equity 880,667 747,983 1-4 family mortgages 540,148 423,922 Installment 253,061 237,999 Total consumer loans 1,673,876 1,409,904 Total loans $ 10,054,370 $ 8,254,145 Deferred loan fees included in total loans $ 4,429 $ 3,838 Overdrawn demand deposits included in total loans 6,303 7,836 The increase in total loans for the quarter ended March 31, 2017 includes loans acquired in the Standard acquisition. For additional disclosure related to the Standard transaction, see note 3 , " Acquisitions ." 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 2016 10-K. Loan Sales The following table presents loan sales for the quarters ended March 31, 2017 and 2016 . Loan Sales (Dollar amounts in thousands) Quarters Ended 2017 2016 Corporate loan sales Proceeds from sales $ 15,368 $ 9,588 Less book value of loans sold 15,117 9,130 Net gains on corporate loan sales (1) $ 251 $ 458 1-4 family mortgage loan sales Proceeds from sales $ 55,761 $ 39,507 Less book value of loans sold 54,598 38,680 Net gains on 1-4 family mortgage loan sales (2) 1,163 827 Total net gains on loan sales $ 1,414 $ 1,285 (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	3 Months Ended
	Mar. 31, 2017
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 the carrying amount of acquired and covered PCI and non-PCI loans as of March 31, 2017 and December 31, 2016 . Acquired and Covered Loans (1) (Dollar amounts in thousands) As of March 31, 2017 As of December 31, 2016 PCI Non-PCI Total PCI Non-PCI Total Acquired loans $ 169,961 $ 2,101,985 $ 2,271,946 $ 53,772 $ 613,339 $ 667,111 Covered loans 7,746 14,712 22,458 7,895 15,379 23,274 Total acquired and covered loans $ 177,707 $ 2,116,697 $ 2,294,404 $ 61,667 $ 628,718 $ 690,385 (1) Included in loans in the Consolidated Statements of Condition. The outstanding balance of PCI loans was $251.2 million and $84.8 million as of March 31, 2017 and December 31, 2016 , respectively. The increase in acquired loans for the quarter ended March 31, 2017 includes loans acquired in the Standard acquisition. For additional disclosure related to the Standard transaction, see note 3 , " Acquisitions ." Acquired non-PCI loans that are renewed are no longer classified as acquired loans. These loans totaled $170.9 million and $117.6 million as of March 31, 2017 and December 31, 2016 , 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 March 31, 2017 and December 31, 2016 . Rollforwards of the carrying value of the FDIC indemnification asset for the quarters ended March 31, 2017 and 2016 are presented in the following table. Changes in the FDIC Indemnification Asset (Dollar amounts in thousands) Quarters Ended 2017 2016 Beginning balance $ 4,522 $ 3,903 Amortization (302 ) (280 ) Change in expected reimbursements from the FDIC for changes in expected credit losses (328 ) 216 Net payments to the FDIC 328 1,841 Ending balance $ 4,220 $ 5,680 Changes in the accretable yield for acquired and covered PCI loans were as follows. Changes in Accretable Yield (Dollar amounts in thousands) Quarters Ended 2017 2016 Beginning balances $ 19,385 $ 24,912 Additions 27,316 3,981 Accretion (3,955 ) (1,546 ) Other (1) (1,497 ) (89 ) Ending balance $ 41,249 $ 27,258 (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. Total accretion on acquired and covered PCI and non-PCI loans for March 31, 2017 and 2016 was $11.3 million and $2.4 million , respectively.

Past Due Loans, Allowance For C

Past Due Loans, Allowance For Credit Losses, Impaired Loans, and TDRS	3 Months Ended
	Mar. 31, 2017
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 March 31, 2017 and December 31, 2016 . 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 (1) 30-89 Days Past Due 90 Days or More Past Due Total Past Due Total Loans Non- accrual (2) 90 Days or More Past Due, Still Accruing Interest As of March 31, 2017 Commercial and industrial $ 3,359,919 $ 7,165 $ 3,696 $ 10,861 $ 3,370,780 $ 21,514 $ 1,251 Agricultural 420,692 1,434 658 2,092 422,784 1,283 — Commercial real estate: Office, retail, and industrial 1,971,050 1,281 16,648 17,929 1,988,979 19,505 52 Multi-family 666,914 4,782 14 4,796 671,710 163 14 Construction 565,710 2,556 194 2,750 568,460 198 — Other commercial real estate 1,352,633 3,563 1,585 5,148 1,357,781 3,858 1 Total commercial real estate 4,556,307 12,182 18,441 30,623 4,586,930 23,724 67 Total corporate loans 8,336,918 20,781 22,795 43,576 8,380,494 46,521 1,318 Home equity 874,810 3,045 2,812 5,857 880,667 4,799 864 1-4 family mortgages 538,177 1,254 717 1,971 540,148 2,974 41 Installment 250,952 1,699 410 2,109 253,061 — 410 Total consumer loans 1,663,939 5,998 3,939 9,937 1,673,876 7,773 1,315 Total loans $ 10,000,857 $ 26,779 $ 26,734 $ 53,513 $ 10,054,370 $ 54,294 $ 2,633 As of December 31, 2016 Commercial and industrial $ 2,816,442 $ 6,426 $ 4,790 $ 11,216 $ 2,827,658 $ 29,938 $ 374 Agricultural 388,596 — 900 900 389,496 181 736 Commercial real estate: Office, retail, and industrial 1,564,007 5,327 12,633 17,960 1,581,967 17,277 1,129 Multi-family 612,446 858 748 1,606 614,052 311 604 Construction 450,927 332 281 613 451,540 286 — Other commercial real estate 974,575 1,307 3,646 4,953 979,528 2,892 1,526 Total commercial real estate 3,601,955 7,824 17,308 25,132 3,627,087 20,766 3,259 Total corporate loans 6,806,993 14,250 22,998 37,248 6,844,241 50,885 4,369 Home equity 740,919 4,545 2,519 7,064 747,983 5,465 109 1-4 family mortgages 420,264 2,652 1,006 3,658 423,922 2,939 272 Installment 236,264 1,476 259 1,735 237,999 — 259 Total consumer loans 1,397,447 8,673 3,784 12,457 1,409,904 8,404 640 Total loans $ 8,204,440 $ 22,923 $ 26,782 $ 49,705 $ 8,254,145 $ 59,289 $ 5,009 (1) PCI loans with an accretable yield are considered current. (2) Includes PCI loans of $387,000 and $682,000 as of March 31, 2017 and December 31, 2016 , respectively, which no longer have an accretable yield as estimates of expected future cash flows have decreased since the acquisition due to credit deterioration. 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 ended March 31, 2017 and 2016 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 Reserve for Unfunded Commitments Total Allowance for Credit Losses Quarter ended March 31, 2017 Beginning balance $ 40,709 $ 17,595 $ 3,261 $ 3,444 $ 7,739 $ 13,335 $ 1,000 $ 87,083 Charge-offs (4,074 ) (127 ) — (5 ) (408 ) (1,664 ) — (6,278 ) Recoveries 1,666 975 28 227 101 443 — 3,440 Net charge-offs (2,408 ) 848 28 222 (307 ) (1,221 ) — (2,838 ) Provision for loan losses and other 3,485 (742 ) (429 ) 444 (510 ) 2,670 — 4,918 Ending balance $ 41,786 $ 17,701 $ 2,860 $ 4,110 $ 6,922 $ 14,784 $ 1,000 $ 89,163 Quarter ended March 31, 2016 Beginning balance $ 37,074 $ 13,124 $ 2,469 $ 1,440 $ 6,109 $ 13,414 $ 1,225 $ 74,855 Charge-offs (1,898 ) (524 ) (204 ) (126 ) (1,445 ) (992 ) — (5,189 ) Recoveries 502 103 25 15 151 320 — 1,116 Net charge-offs (1,396 ) (421 ) (179 ) (111 ) (1,294 ) (672 ) — (4,073 ) Provision for loan losses and other 2,058 1,717 257 1,104 1,773 684 — 7,593 Ending balance $ 37,736 $ 14,420 $ 2,547 $ 2,433 $ 6,588 $ 13,426 $ 1,225 $ 78,375 The table below provides a breakdown of loans and the related allowance for credit losses by portfolio segment as of March 31, 2017 and December 31, 2016 . 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 March 31, 2017 Commercial, industrial, and agricultural $ 18,167 $ 3,745,009 $ 30,388 $ 3,793,564 $ 109 $ 41,133 $ 544 $ 41,786 Commercial real estate: Office, retail, and industrial 13,442 1,956,042 19,495 1,988,979 31 16,200 1,470 17,701 Multi-family 396 656,769 14,545 671,710 — 2,784 76 2,860 Construction — 548,280 20,180 568,460 — 3,946 164 4,110 Other commercial real estate 2,493 1,286,300 68,988 1,357,781 18 5,832 1,072 6,922 Total commercial real estate 16,331 4,447,391 123,208 4,586,930 49 28,762 2,782 31,593 Total corporate loans 34,498 8,192,400 153,596 8,380,494 158 69,895 3,326 73,379 Consumer — 1,649,765 24,111 1,673,876 — 13,550 1,234 14,784 Reserve for unfunded commitments — — — — — 1,000 — 1,000 Total loans $ 34,498 $ 9,842,165 $ 177,707 $ 10,054,370 $ 158 $ 84,445 $ 4,560 $ 89,163 As of December 31, 2016 Commercial, industrial, and agricultural $ 24,645 $ 3,189,327 $ 3,182 $ 3,217,154 $ 507 $ 39,554 $ 648 $ 40,709 Commercial real estate: Office, retail, and industrial 16,287 1,553,234 12,446 1,581,967 — 16,148 1,448 17,596 Multi-family 398 601,429 12,225 614,052 — 3,059 202 3,261 Construction 34 447,058 4,448 451,540 — 3,280 164 3,444 Other commercial real estate 1,286 965,900 12,342 979,528 18 6,613 1,108 7,739 Total commercial real estate 18,005 3,567,621 41,461 3,627,087 18 29,100 2,922 32,040 Total corporate loans 42,650 6,756,948 44,643 6,844,241 525 68,654 3,569 72,748 Consumer — 1,392,880 17,024 1,409,904 — 12,210 1,125 13,335 Reserve for unfunded commitments — — — — — 1,000 — 1,000 Total loans $ 42,650 $ 8,149,828 $ 61,667 $ 8,254,145 $ 525 $ 81,864 $ 4,694 $ 87,083 Loans Individually Evaluated for Impairment The following table presents loans individually evaluated for impairment by class of loan as of March 31, 2017 and December 31, 2016 . PCI loans are excluded from this disclosure. Impaired Loans Individually Evaluated by Class (Dollar amounts in thousands) As of March 31, 2017 As of December 31, 2016 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 $ 16,781 $ 272 $ 25,299 $ 109 $ 11,579 $ 13,066 $ 29,514 $ 507 Agricultural 1,114 — 1,817 — — — — — Commercial real estate: Office, retail, and industrial 12,732 710 17,723 31 16,287 — 21,057 — Multi-family 396 — 596 — 398 — 398 — Construction — — 315 — 34 — 34 — Other commercial real estate 2,258 235 4,550 18 1,016 270 2,141 18 Total commercial real estate 16,500 945 25,001 49 17,735 270 23,630 18 Total impaired loans individually evaluated for impairment $ 33,281 $ 1,217 $ 50,300 $ 158 $ 29,314 $ 13,336 $ 53,144 $ 525 The following table presents the average recorded investment and interest income recognized on impaired loans by class for the quarters ended March 31, 2017 and 2016 . 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 March 31, 2017 2016 Average Interest Income Recognized (1) Average Interest Income Recognized (1) Commercial and industrial $ 20,849 $ 214 $ 2,794 $ 38 Agricultural 557 — — — Commercial real estate: Office, retail, and industrial 14,865 93 7,923 48 Multi-family 397 28 601 1 Construction 17 136 106 — Other commercial real estate 1,890 12 3,819 19 Total commercial real estate 17,169 269 12,449 68 Total impaired loans $ 38,575 $ 483 $ 15,243 $ 106 (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, as of March 31, 2017 and December 31, 2016 . Corporate Credit Quality Indicators by Class (Dollar amounts in thousands) Pass Special Mention (1) (4) Substandard (2) (4) Non-accrual (3) Total As of March 31, 2017 Commercial and industrial $ 3,134,827 $ 113,944 $ 100,495 $ 21,514 $ 3,370,780 Agricultural 405,354 9,873 6,274 1,283 422,784 Commercial real estate: Office, retail, and industrial 1,887,699 39,545 42,230 19,505 1,988,979 Multi-family 665,313 4,336 1,898 163 671,710 Construction 542,862 8,927 16,473 198 568,460 Other commercial real estate 1,312,347 21,599 19,977 3,858 1,357,781 Total commercial real estate 4,408,221 74,407 80,578 23,724 4,586,930 Total corporate loans $ 7,948,402 $ 198,224 $ 187,347 $ 46,521 $ 8,380,494 As of December 31, 2016 Commercial and industrial $ 2,638,833 $ 92,340 $ 66,547 $ 29,938 $ 2,827,658 Agricultural 366,382 17,039 5,894 181 389,496 Commercial real estate: Office, retail, and industrial 1,491,030 34,007 39,513 17,277 1,581,827 Multi-family 607,324 4,370 2,029 311 614,034 Construction 438,946 111 12,197 286 451,540 Other commercial real estate 951,115 11,808 13,544 2,892 979,359 Total commercial real estate 3,488,415 50,296 67,283 20,766 3,626,760 Total corporate loans $ 6,493,630 $ 159,675 $ 139,724 $ 50,885 $ 6,843,914 (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 $674,000 as of March 31, 2017 and $834,000 as of December 31, 2016 . Consumer Credit Quality Indicators by Class (Dollar amounts in thousands) Performing Non-accrual Total As of March 31, 2017 Home equity $ 875,868 $ 4,799 $ 880,667 1-4 family mortgages 537,174 2,974 540,148 Installment 253,061 — 253,061 Total consumer loans $ 1,666,103 $ 7,773 $ 1,673,876 As of December 31, 2016 Home equity $ 727,618 $ 4,986 $ 732,604 1-4 family mortgages 413,415 2,939 416,354 Installment 237,999 — 237,999 Total consumer loans $ 1,379,032 $ 7,925 $ 1,386,957 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 March 31, 2017 and December 31, 2016 . 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 March 31, 2017 As of December 31, 2016 Accruing Non-accrual (1) Total Accruing Non-accrual (1) Total Commercial and industrial $ 278 $ 922 $ 1,200 $ 281 $ 150 $ 431 Agricultural — — — — — — Commercial real estate: Office, retail, and industrial — 864 864 155 4,733 4,888 Multi-family 582 163 745 586 168 754 Construction — — — — — — Other commercial real estate 263 — 263 268 48 316 Total commercial real estate 845 1,027 1,872 1,009 4,949 5,958 Total corporate loans 1,123 1,949 3,072 1,290 5,099 6,389 Home equity 172 795 967 177 820 997 1-4 family mortgages 817 368 1,185 824 378 1,202 Installment — — — — — — Total consumer loans 989 1,163 2,152 1,001 1,198 2,199 Total loans $ 2,112 $ 3,112 $ 5,224 $ 2,291 $ 6,297 $ 8,588 (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 $32,000 in specific reserves related to TDR s as of March 31, 2017 and there were no specific reserves related to TDRs as of December 31, 2016 . 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 ended March 31, 2017 and 2016 . A rollforward of the carrying value of TDR s for the quarters ended March 31, 2017 and 2016 is presented in the following table. TDR Rollforward (Dollar amounts in thousands) Quarters Ended 2017 2016 Accruing Beginning balance $ 2,291 $ 2,743 Additions 922 — Net payments received (24 ) (41 ) Net transfers to non-accrual (1,077 ) — Ending balance 2,112 2,702 Non-accrual Beginning balance 6,297 2,324 Net payments received (4,150 ) (56 ) Charge-offs (112 ) — Net transfers from accruing 1,077 — Ending balance 3,112 2,268 Total TDRs $ 5,224 $ 4,970 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 March 31, 2017 and December 31, 2016 .

Premises, Furniture, and Equipm

Premises, Furniture, and Equipment	3 Months Ended
	Mar. 31, 2017
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 March 31, December 31, Land $ 29,942 $ 18,304 Premises 138,748 94,369 Furniture and equipment 133,618 105,859 Total cost 302,308 218,532 Accumulated depreciation (178,801 ) (140,030 ) Net book value of premises, furniture, and equipment 123,507 78,502 Assets held-for-sale 17,146 4,075 Total premises, furniture, and equipment $ 140,653 $ 82,577 During 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, with $79.5 million of deferred pre-tax gains remaining as of March 31, 2017. As of March 31, 2017 and December 31, 2016 assets held-for-sale consisted of former branches that are no longer in operation and parcels of land previously purchased for expansion. Depreciation on premises, furniture, and equipment totaled $3.5 million and $3.2 million for the quarter s ended March 31, 2017 and 2016, respectively. Operating Leases As of March 31, 2017 , 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, 2033 . 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 March 31, 2017 . Future Minimum Operating Lease Payments (Dollar amounts in thousands) Total One year or less $ 18,809 After one year to two years 16,591 After two years to three years 16,800 After three years to four years 16,276 After four years to five years 16,190 After five years 124,340 Total minimum lease payments $ 209,006 As of March 31, 2017, deferred pre-tax gains of $79.5 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. The Company assumed certain operating leases related to various branches in previous acquisitions. An intangible liability is recorded when the cash flows of a lease exceeds its 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 and 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 829 After two years to three years 658 After three years to four years 648 After four years to five years 648 After five years 3,835 Total accretion $ 7,798 The following table presents net operating lease expense for the quarters ended March 31, 2017 and 2016 . Net Operating Lease Expense (Dollar amounts in thousands) Quarters Ended 2017 2016 Lease expense charged to operations $ 4,559 $ 1,727 Accretion of operating lease intangible (1) (295 ) (286 ) Accretion of deferred gain on sale-leaseback transaction (1) (1,473 ) — Rental income from premises leased to others (1) (181 ) (158 ) Net operating lease expense $ 2,610 $ 1,283 (1) Included as reductions to net occupancy and equipment expense in the Condensed Consolidated Statements of Income.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	3 Months Ended
	Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	GOODWILL AND OTHER INTANGIBLE ASSETS The Company's annual goodwill impairment test was performed as of October 1, 2016. It was determined that no impairment existed as of that date or as of March 31, 2017 . For a discussion of the accounting policies for goodwill and other intangible assets, see Note 1 , " Summary of Significant Accounting Policies " to the Consolidated Financial Statements in the Company 's 2016 10-K. The following table presents changes in the carrying amount of goodwill for the quarters ended March 31, 2017 and 2016 . Changes in the Carrying Amount of Goodwill (Dollar amounts in thousands) Quarters Ended March 31, 2017 2016 Beginning balance $ 340,879 $ 319,007 Acquisitions 350,693 20,761 Ending balance $ 691,572 $ 339,768 The increase in goodwill for the quarter ended March 31, 2017 resulted from the Standard and Premier acquisitions and measurement period adjustments related to finalizing the fair values of the assets acquired and liabilities assumed in the NI Bancshares acquisition. During the quarter ended March 31, 2016 , the increase in goodwill resulted from the NI Bancshares acquisition. The Company's other intangible assets are core deposit intangibles and trust department customer relationship intangibles, which are being amortized over their estimated useful lives. Other intangible assets are subject to impairment testing when events or circumstances indicate that its carrying amount may not be recoverable. The increase in other intangible assets for the quarter ended March 31, 2017 resulted from the Standard and Premier acquisitions. The increase in other intangible assets for the quarter ended March 31, 2016 resulted from the NI Bancshares acquisition. During the quarters ended March 31, 2017 and March 31, 2016 there were no events or circumstances to indicate impairment. Other Intangible Assets (Dollar amounts in thousands) Three Months Ended March 31, 2017 2016 Gross Accumulated Amortization Net Gross Accumulated Amortization Net Beginning balance $ 58,959 $ 32,962 $ 25,997 $ 48,550 $ 28,280 $ 20,270 Additions 39,017 — 39,017 10,925 — 10,925 Amortization expense — 1,965 (1,965 ) — 985 (985 ) Ending balance $ 97,976 $ 34,927 $ 63,049 $ 59,475 $ 29,265 $ 30,210 Scheduled Amortization of Other Intangible Assets (Dollar amounts in thousands) Total Year Ending March 31, 2017 2018 $ 7,702 2019 7,108 2020 7,064 2021 7,009 2022 6,922 2023 and thereafter 27,244 Total $ 63,049

Deposits

Deposits	3 Months Ended
	Mar. 31, 2017
Deposits [Abstract]
Deposits	DEPOSITS The following table presents the Company's deposits by type. Summary of Deposits (Dollar amounts in thousands) As of March 31, December 31, Demand deposits $ 3,492,987 $ 2,766,748 Savings deposits 2,073,518 1,615,833 NOW accounts 1,876,215 1,675,421 Money market deposits 1,972,566 1,577,316 Time deposits less than $100,000 918,092 755,558 Time deposits greater than $100,000 623,163 437,727 Total deposits $ 10,956,541 $ 8,828,603 The increase in total deposits for the quarter ended March 31, 2017 includes deposits assumed in the Standard acquisition. For additional disclosure related to the Standard transaction, see note 3 , " Acquisitions ."

Earnings Per Common Share

Earnings Per Common Share	3 Months Ended
	Mar. 31, 2017
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 2017 2016 Net income $ 22,855 $ 17,962 Net income applicable to non-vested restricted shares (234 ) (212 ) Net income applicable to common shares $ 22,621 $ 17,750 Weighted-average common shares outstanding: Weighted-average common shares outstanding (basic) 100,411 77,980 Dilutive effect of common stock equivalents 21 12 Weighted-average diluted common shares outstanding 100,432 77,992 Basic EPS $ 0.23 $ 0.23 Diluted EPS $ 0.23 $ 0.23 Anti-dilutive shares not included in the computation of diluted EPS (1) 343 608 (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	3 Months Ended
	Mar. 31, 2017
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 March 31, 2017 December 31, 2016 Gross notional amount outstanding $ 5,833 $ 5,958 Derivative liability fair value (226 ) (282 ) Weighted-average interest rate received 2.83 % 2.63 % Weighted-average interest rate paid 5.96 % 5.96 % Weighted-average maturity (in years) 1.60 1.84 Fair value of derivative (1) $ 240 $ 296 (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 ended March 31, 2017 and 2016 , gains or losses related to fair value hedge ineffectiveness were not material. Cash Flow Hedges As of March 31, 2017 , the Company hedged $980.0 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 $980.0 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 $415.0 million began on various dates between June of 2015 and February of 2017, and mature between June of 2019 and February of 2020. The remaining forward starting interest rate swaps begin at various dates between February of 2018 and February of 2020 and mature between February of 2020 and April of 2022. These derivative contracts are designated as cash flow hedges. Cash Flow Hedges (Dollar amounts in thousands) As of March 31, 2017 December 31, 2016 Gross notional amount outstanding $ 1,960,000 $ 1,470,000 Derivative asset fair value 4,078 5,402 Derivative liability fair value (8,286 ) (7,390 ) Weighted-average interest rate received 1.42 % 1.37 % Weighted-average interest rate paid 1.23 % 1.11 % Weighted-average maturity (in years) 3.00 2.83 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 ended March 31, 2017 and 2016, there were no material gains or losses related to cash flow hedge ineffectiveness. As of March 31, 2017 , the Company estimates that $7.6 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 through capital market products with its commercial customers and simultaneously enters into an offsetting interest rate derivative transaction 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 March 31, 2017 and December 31, 2016 , 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. Capital market products income related to commercial customer derivative instruments of $1.4 million and $3.2 million were recorded in noninterest income for the quarters ended March 31, 2017 and 2016, respectively. Other Derivative Instruments (Dollar amounts in thousands) As of March 31, 2017 December 31, 2016 Gross notional amount outstanding $ 2,100,325 $ 1,656,612 Derivative asset fair value 15,722 13,478 Derivative liability fair value (15,722 ) (13,478 ) Fair value of derivative (1) 16,340 13,753 (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 March 31, 2017 and December 31, 2016 . 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 March 31, 2017 and December 31, 2016 , 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 March 31, 2017 and December 31, 2016 . Fair Value of Offsetting Derivatives (Dollar amounts in thousands) As of March 31, 2017 As of December 31, 2016 Assets Liabilities Assets Liabilities Gross amounts recognized $ 19,800 $ 24,234 $ 18,880 $ 21,150 Less: amounts offset in the Consolidated Statements of Financial Condition — — — — Net amount presented in the Consolidated Statements of Financial Condition (1) 19,800 24,234 18,880 21,150 Gross amounts not offset in the Consolidated Statements of Financial Condition: Offsetting derivative positions (11,293 ) (11,293 ) (10,889 ) (10,889 ) Cash collateral pledged — (12,941 ) — (10,261 ) Net credit exposure $ 8,507 $ — $ 7,991 $ — (1) Included in other assets or other liabilities in the Consolidated Statements of Financial Condition. As of March 31, 2017 and December 31, 2016 , 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 March 31, 2017 and December 31, 2016 the Company was in compliance with these provisions.

Commitments, Guarantees, and Co

Commitments, Guarantees, and Contingent Liabilities	3 Months Ended
	Mar. 31, 2017
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 March 31, 2017 December 31, 2016 Commitments to extend credit: Commercial, industrial, and agricultural $ 1,737,410 $ 1,522,152 Commercial real estate 427,425 397,423 Home equity 486,880 426,384 Other commitments (1) 250,123 214,943 Total commitments to extend credit $ 2,901,838 $ 2,560,902 Letters of credit $ 146,632 $ 100,430 Recourse on assets sold: Unpaid principal balance of loans sold $ 185,101 $ 187,158 Carrying value of recourse obligation (2) 150 142 (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 ended March 31, 2017 and 2016 . Legal Proceedings In the ordinary course of business, there were certain legal proceedings pending against the Company and its subsidiaries at March 31, 2017 . 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	3 Months Ended
	Mar. 31, 2017
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 required to be measured at fair value on a recurring basis 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 March 31, 2017 As of December 31, 2016 Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Assets: Trading securities: Money market funds $ 1,768 $ — $ — $ 1,645 $ — $ — Mutual funds 17,362 — — 16,275 — — Total trading securities 19,130 — — 17,920 — — Securities available-for-sale: U.S. treasury securities 48,516 — — 48,541 — — U.S. agency securities — 181,030 — — 183,637 — CMOs — 1,051,364 — — 1,047,446 — MBSs — 352,966 — — 332,655 — Municipal securities — 262,710 — — 270,846 — CDOs — — 33,436 — — 33,260 Equity securities — 7,102 — — 3,065 — Total securities available-for-sale 48,516 1,855,172 33,436 48,541 1,837,649 33,260 Mortgage servicing rights ("MSRs") (1) — — 6,245 6,120 Derivative assets (1) — 19,800 — — 18,880 — Liabilities: Derivative liabilities (2) $ — $ 24,234 $ — $ — $ 21,150 $ — (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 March 31, 2017 and December 31, 2016. Significant Unobservable Inputs Used in the Valuation of CDOs As of March 31, 2017 December 31, 2016 Probability of prepayment 0.0 % - 10.9% 0.0 % - 10.9% Probability of default 16.6 % - 44.1% 16.7 % - 46.8% Loss given default 93.3 % - 99.1% 93.3 % - 98.9% Probability of deferral cure 0.0 % - 100.0% 7.6 % - 100.0% 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 ended March 31, 2017 and 2016 is presented in the following table. Carrying Value of CDOs (Dollar amounts in thousands) Quarters Ended 2017 2016 Beginning balance $ 33,260 $ 31,529 Change in other comprehensive income (1) 129 (786 ) Other 47 14 Ending balance $ 33,436 $ 30,757 (1) Included in unrealized holding gains in the Consolidated Statements of Comprehensive Income. MSR s The Company services loans for others totaling $632.7 million as of March 31, 2017 and $640.5 million as of December 31, 2016 . These loans are owned by third parties and are not included in the Consolidated Statements of Financial Condition. 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 March 31, 2017 . Significant Unobservable Inputs Used in the Valuation of MSR s As of March 31, 2017 December 31, 2016 Prepayment speed 7.7 % - 25.5% 7.7 % - 22.8% Maturity (months) 10 - 102 12 - 103 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 ended March 31, 2017 and 2016 is presented in the following table. Carrying Value of MSR s (Dollar amounts in thousands) Quarters Ended 2017 2016 Beginning balance $ 6,120 $ 1,853 Additions from acquisition — 3,092 New MSRs 156 185 Total gains (losses) included in earnings (1) : Changes in valuation inputs and assumptions 172 (40 ) Other changes in fair value (2) (203 ) (68 ) Ending balance $ 6,245 $ 5,022 Contractual servicing fees earned (1) $ 395 $ 183 (1) Included in mortgage banking income in the Condensed Consolidated Statements of Income and related to assets held as of March 31, 2017 and 2016 . (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 March 31, 2017 As of December 31, 2016 Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Collateral-dependent impaired loans (1) $ — $ — $ 11,528 $ — $ — $ 22,019 OREO (2) — — 780 — — 8,624 Loans held-for-sale (3) — — 9,144 — — 10,484 Assets held-for-sale (4) — — 17,146 — — 4,075 (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 March 31, 2017 , loans held-for-sale consists of 1-4 family mortgage loans, which were originated with the intent to sell and three corporate loans. 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, 2016 , loans held-for-sale consists of 1-4 family mortgage loans, which were originated with the intent to sell, and a corporate loan. Assets Held-for-Sale Assets held-for-sale as of March 31, 2017 and December 31, 2016 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 March 31, 2017 December 31, 2016 Fair Value Hierarchy Level Carrying Amount Fair Value Carrying Amount Fair Value Assets: Cash and due from banks 1 $ 174,268 $ 174,268 $ 155,055 $ 155,055 Interest-bearing deposits in other banks 2 74,892 74,892 107,093 107,093 Securities held-to-maturity 2 17,742 15,118 22,291 18,212 FHLB and FRB stock 2 46,306 46,306 59,131 59,131 Loans 3 9,970,427 9,712,763 8,172,584 7,973,845 Investment in BOLI 3 276,960 276,960 219,746 219,746 Accrued interest receivable 3 39,868 39,868 34,384 34,384 Other interest-earning assets 3 635 635 834 834 Liabilities: Deposits 2 $ 10,956,541 $ 10,945,331 $ 8,828,603 $ 8,820,572 Borrowed funds 2 547,923 547,923 879,008 879,008 Senior and subordinated debt 2 194,745 202,522 194,603 197,888 Accrued interest payable 2 2,564 2,564 3,416 3,416 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, 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. 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 values of senior and subordinated notes are estimated based on quoted market prices of similar instruments. The fair values of junior subordinated debentures are estimated based on quoted market prices of comparable securities when available, or by discounting the expected future cash flows at market interest rates. 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)	3 Months Ended
	Mar. 31, 2017
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 ended March 31, 2017 are not necessarily indicative of the results that may be expected for the year ending December 31, 2017 . 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 2016 Annual Report on Form 10-K (" 2016 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. During 2015, certain covered loans were no longer covered under the FDIC Agreements, and are included in acquired loans and no longer classified as covered loans. 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 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 generally 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/Loan Losses and Reserve for Unfunded Commitments	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 collateral 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 Contingent Put and Call Options in Debt Instruments: In March of 2016, the Financial Accounting Standards Board ("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. The adoption of this guidance on January 1, 2017 did not 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. The adoption of this guidance on January 1, 2017 did not 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. The adoption of this guidance on January 1, 2017 resulted in a $638,000 tax benefit recorded in the Company's results of operations. The Company elected to estimate forfeitures, which is consistent with the Company's practice before the adoption of this guidance. 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 but was deferred to 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. The Company's revenue is comprised of net interest income on financial assets and liabilities, which are excluded from the scope of this guidance, and noninterest income. The Company expects that this guidance will change how revenue from certain revenue streams is recognized within wealth management fees but does not expect these changes to have a significant impact on the Company's financial condition, results of operations, or liquidity. The Company continues to evaluate the impact of this guidance on other components of noninterest income. The Company will adopt this guidance on January 1, 2018, with a cumulative effect adjustment to opening retained earnings, if an adjustment is deemed to be significant. 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 2016, the Company entered into a sale-leaseback transaction that resulted in a deferred gain of $82.5 million , with $79.5 million remaining as of March 31, 2017 . 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. 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. Income Taxes: In October of 2016, the FASB issued guidance that requires an entity to recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. 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. Clarifying the Definition of a Business: In January of 2017, the FASB issued guidance that clarifies the definition of a business to assist entities with evaluating whether transactions should be accounted for as acquisitions or disposals of assets or businesses. 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. Accounting for Goodwill Impairment: In January of 2017, the FASB issued guidance that simplifies the accounting for goodwill impairment for all entities. The new guidance eliminates the requirement to calculate the implied fair value of goodwill using the second step of the quantitative two-step goodwill impairment model prescribed under current accounting guidance. Under the new guidance, if a reporting unit's carrying amount exceeds its fair value, an entity will record an impairment charge based on that difference. This guidance is effective for annual and interim goodwill impairment testing dates beginning after December 15, 2019. Early adoption is permitted for annual and interim goodwill impairment testing dates after January 1, 2017. Management does not expect the adoption of this guidance will materially impact the Company's financial condition, results of operations, or liquidity. Presentation of Defined Benefit Retirement Plan Costs: In March of 2017, the FASB issued guidance that changes how employers that sponsor defined pension and or other postretirement benefit plans present the net periodic benefit cost in the income statement. Employers will present the service cost component of net periodic benefit cost in the same income statement line item as other employee compensation costs arising from services rendered during the period. Other components of net periodic benefit cost will be presented separately from the line item(s) that includes the service cost. 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. Premium Amortization on Purchased Callable Debt Securities: In March of 2017, the FASB issued guidance that shortens the amortization period for the premium on certain purchased callable debt securities to the earliest call date. This guidance is effective for annual and interim periods beginning after December 15, 2018. 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.

Acquisitions (Tables)

Acquisitions (Tables)	3 Months Ended
	Mar. 31, 2017
Business Combinations [Abstract]
Schedule of Acquisition Activity	The following table presents the assets acquired and liabilities assumed, net of the fair value adjustments, in the Standard and NI Bancshares 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) Standard NI Bancshares January 6, 2017 March 8, 2016 Assets Cash and due from banks and interest-bearing deposits in other banks $ 102,149 $ 72,533 Securities available-for-sale 214,107 125,843 Securities held-to-maturity — 1,864 FHLB and FRB stock 3,247 1,549 Loans 1,769,709 396,181 OREO 8,427 2,863 Investment in BOLI 55,629 8,384 Goodwill 339,298 22,174 Other intangible assets 31,072 10,408 Premises, furniture, and equipment 59,163 19,636 Accrued interest receivable and other assets 56,077 16,453 Total assets $ 2,638,878 $ 677,888 Liabilities Noninterest-bearing deposits $ 675,354 $ 130,909 Interest-bearing deposits 1,348,520 464,012 Total deposits 2,023,874 594,921 Borrowed funds — 2,416 Intangible liabilities — 230 Accrued interest payable and other liabilities 34,289 10,239 Total liabilities 2,058,163 607,806 Consideration Paid Common stock (2017 - 21,057,085 shares issued at $25.34 per share, 2016 - 3,042,494 shares issued at $18.059 per share), net of issuance costs 533,590 54,896 Cash paid 47,125 15,186 Total consideration paid 580,715 70,082 $ 2,638,878 $ 677,888
Unaudited Pro Forma Combined Results of Operations	The unaudited pro forma combined results of operations for the quarters ended March 31, 2017 and 2016 are presented as if the Standard acquisition had occurred on January 1, 2016, the first day of the Company's 2016 fiscal year. The unaudited pro forma combined results of operations are presented for illustrative purposes only and do not necessarily indicate the financial results of the combined companies had the companies actually been combined at the beginning of the period presented. Fair value adjustments included in the following table are preliminary and may be revised. The unaudited pro forma results of operations also does not consider any potential impacts of potential revenue enhancements, anticipated cost savings and expense efficiencies, or asset dispositions, among other factors. Acquisition and integration related expenses directly attributable to the Standard acquisition have been excluded from the following table and are estimated to total $27.0 million , of which $17.5 million was expensed during the quarter ended March 31, 2017. Unaudited Pro Forma Combined Results of Operations (Dollar amounts in thousands) Quarters Ended March 31, 2017 2016 Total revenues (1) $ 156,757 $ 143,345 Net income 32,734 22,950 (1) Includes net interest income and total noninterest income.
Summary of Standard Acquired Loans	The following table presents additional detail for loans acquired in the Standard transaction at the acquisition date. Standard Acquired Loans (Dollar amounts in thousands) January 6, 2017 PCI Loans Non-PCI Loans Fair value $ 123,643 $ 1,646,066 Contractually required principal and interest payments 208,586 1,940,459 Best estimate of contractual cash flows not expected to be collected (1) 57,626 100,918 Best estimate of contractual cash flows expected to be collected 150,960 1,839,541 (1) Includes interest payments not expected to be collected due to loan prepayments as well as principal and interest payments not expected to be collected due to customer default.

Securities (Tables)

Securities (Tables)	3 Months Ended
	Mar. 31, 2017
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 March 31, 2017 As of December 31, 2016 Amortized Cost Gross Unrealized Fair Value Amortized Cost Gross Unrealized Fair Value Gains Losses Gains Losses Securities Available-for-Sale U.S. treasury securities $ 48,574 $ 23 $ (81 ) $ 48,516 $ 48,581 $ 26 $ (66 ) $ 48,541 U.S. agency securities 180,894 518 (382 ) 181,030 183,528 519 (410 ) 183,637 Collateralized mortgage obligations ("CMOs") 1,066,439 1,039 (16,114 ) 1,051,364 1,064,130 969 (17,653 ) 1,047,446 Other mortgage-backed securities ("MBSs") 357,473 1,230 (5,737 ) 352,966 337,139 1,395 (5,879 ) 332,655 Municipal securities 263,606 2,092 (2,988 ) 262,710 273,319 1,245 (3,718 ) 270,846 Trust-preferred collateralized debt obligations ("CDOs") 47,728 260 (14,552 ) 33,436 47,681 261 (14,682 ) 33,260 Equity securities 7,246 148 (292 ) 7,102 3,206 147 (288 ) 3,065 Total securities available-for-sale $ 1,971,960 $ 5,310 $ (40,146 ) $ 1,937,124 $ 1,957,584 $ 4,562 $ (42,696 ) $ 1,919,450 Securities Held-to-Maturity Municipal securities $ 17,742 $ — $ (2,624 ) $ 15,118 $ 22,291 $ — $ (4,079 ) $ 18,212 Trading Securities $ 19,130 $ 17,920
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 March 31, 2017 As of December 31, 2016 Amortized Cost Gross Unrealized Fair Value Amortized Cost Gross Unrealized Fair Value Gains Losses Gains Losses Securities Available-for-Sale U.S. treasury securities $ 48,574 $ 23 $ (81 ) $ 48,516 $ 48,581 $ 26 $ (66 ) $ 48,541 U.S. agency securities 180,894 518 (382 ) 181,030 183,528 519 (410 ) 183,637 Collateralized mortgage obligations ("CMOs") 1,066,439 1,039 (16,114 ) 1,051,364 1,064,130 969 (17,653 ) 1,047,446 Other mortgage-backed securities ("MBSs") 357,473 1,230 (5,737 ) 352,966 337,139 1,395 (5,879 ) 332,655 Municipal securities 263,606 2,092 (2,988 ) 262,710 273,319 1,245 (3,718 ) 270,846 Trust-preferred collateralized debt obligations ("CDOs") 47,728 260 (14,552 ) 33,436 47,681 261 (14,682 ) 33,260 Equity securities 7,246 148 (292 ) 7,102 3,206 147 (288 ) 3,065 Total securities available-for-sale $ 1,971,960 $ 5,310 $ (40,146 ) $ 1,937,124 $ 1,957,584 $ 4,562 $ (42,696 ) $ 1,919,450 Securities Held-to-Maturity Municipal securities $ 17,742 $ — $ (2,624 ) $ 15,118 $ 22,291 $ — $ (4,079 ) $ 18,212 Trading Securities $ 19,130 $ 17,920
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 March 31, 2017 As of December 31, 2016 Amortized Cost Gross Unrealized Fair Value Amortized Cost Gross Unrealized Fair Value Gains Losses Gains Losses Securities Available-for-Sale U.S. treasury securities $ 48,574 $ 23 $ (81 ) $ 48,516 $ 48,581 $ 26 $ (66 ) $ 48,541 U.S. agency securities 180,894 518 (382 ) 181,030 183,528 519 (410 ) 183,637 Collateralized mortgage obligations ("CMOs") 1,066,439 1,039 (16,114 ) 1,051,364 1,064,130 969 (17,653 ) 1,047,446 Other mortgage-backed securities ("MBSs") 357,473 1,230 (5,737 ) 352,966 337,139 1,395 (5,879 ) 332,655 Municipal securities 263,606 2,092 (2,988 ) 262,710 273,319 1,245 (3,718 ) 270,846 Trust-preferred collateralized debt obligations ("CDOs") 47,728 260 (14,552 ) 33,436 47,681 261 (14,682 ) 33,260 Equity securities 7,246 148 (292 ) 7,102 3,206 147 (288 ) 3,065 Total securities available-for-sale $ 1,971,960 $ 5,310 $ (40,146 ) $ 1,937,124 $ 1,957,584 $ 4,562 $ (42,696 ) $ 1,919,450 Securities Held-to-Maturity Municipal securities $ 17,742 $ — $ (2,624 ) $ 15,118 $ 22,291 $ — $ (4,079 ) $ 18,212 Trading Securities $ 19,130 $ 17,920
Remaining Contractual Maturity of Securities	Remaining Contractual Maturity of Securities (Dollar amounts in thousands) As of March 31, 2017 Available-for-Sale Held-to-Maturity Amortized Cost Fair Value Amortized Cost Fair Value One year or less $ 90,123 $ 87,605 $ 1,926 $ 1,641 After one year to five years 399,483 388,321 6,834 5,823 After five years to ten years 3,470 3,373 2,975 2,535 After ten years 47,726 46,393 6,007 5,119 Securities that do not have a single contractual maturity date 1,431,158 1,411,432 — — Total $ 1,971,960 $ 1,937,124 $ 17,742 $ 15,118
Securities Available-for-Sale Gains	The following table presents net realized gains on securities available-for-sale for the quarters ended March 31, 2017 and 2016 . Securities Available-for-Sale Gains (Dollar amounts in thousands) Quarters Ended 2017 2016 Gains on sales of securities: Gross realized gains $ — $ 930 Gross realized losses — (43 ) Net realized gains on sales of securities — 887 Non-cash impairment charges: Other-than-temporary securities impairment ("OTTI") — — Net realized gains $ — $ 887
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 ended March 31, 2017 and 2016 . 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 2017 2016 Beginning balance $ 23,345 $ 23,709 OTTI included in earnings (1) : Reduction for sales of securities — — Ending balance $ 23,345 $ 23,709 (1) Included in net securities gains in the Condensed Consolidated Statements of Income.
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 March 31, 2017 and December 31, 2016 . 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 March 31, 2017 Securities Available-for-Sale U.S. treasury securities 17 $ 35,481 $ 75 $ 3,995 $ 6 $ 39,476 $ 81 U.S. agency securities 30 70,426 358 6,928 24 77,354 382 CMOs 196 781,003 12,259 128,464 3,855 909,467 16,114 MBSs 73 290,278 5,180 17,013 557 307,291 5,737 Municipal securities 272 94,694 2,371 21,520 617 116,214 2,988 CDOs 7 — — 30,762 14,552 30,762 14,552 Equity securities 2 — — 6,687 292 6,687 292 Total 597 $ 1,271,882 $ 20,243 $ 215,369 $ 19,903 $ 1,487,251 $ 40,146 Securities Held-to-Maturity Municipal securities 13 $ — $ — $ 15,118 $ 2,624 $ 15,118 $ 2,624 As of December 31, 2016 Securities Available-for-Sale U.S. treasury securities 16 $ 33,505 $ 61 $ 3,995 $ 5 $ 37,500 $ 66 U.S. agency securities 28 62,064 364 11,814 46 73,878 410 CMOs 194 523,233 10,309 411,758 7,344 934,991 17,653 MBSs 68 221,174 4,726 77,780 1,154 298,954 5,880 Municipal securities 380 133,957 3,059 29,280 659 163,237 3,718 CDOs 7 — — 30,592 14,682 30,592 14,682 Equity securities 2 404 201 2,319 86 2,723 287 Total 695 $ 974,337 $ 18,720 $ 567,538 $ 23,976 $ 1,541,875 $ 42,696 Securities Held-to-Maturity Municipal securities 14 $ — $ — $ 18,212 $ 4,079 $ 18,212 $ 4,079

Loans (Tables)

Loans (Tables)	3 Months Ended
	Mar. 31, 2017
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 March 31, December 31, Commercial and industrial $ 3,370,780 $ 2,827,658 Agricultural 422,784 389,496 Commercial real estate: Office, retail, and industrial 1,988,979 1,581,967 Multi-family 671,710 614,052 Construction 568,460 451,540 Other commercial real estate 1,357,781 979,528 Total commercial real estate 4,586,930 3,627,087 Total corporate loans 8,380,494 6,844,241 Home equity 880,667 747,983 1-4 family mortgages 540,148 423,922 Installment 253,061 237,999 Total consumer loans 1,673,876 1,409,904 Total loans $ 10,054,370 $ 8,254,145 Deferred loan fees included in total loans $ 4,429 $ 3,838 Overdrawn demand deposits included in total loans 6,303 7,836
Schedule Of Loans Sold	The following table presents loan sales for the quarters ended March 31, 2017 and 2016 . Loan Sales (Dollar amounts in thousands) Quarters Ended 2017 2016 Corporate loan sales Proceeds from sales $ 15,368 $ 9,588 Less book value of loans sold 15,117 9,130 Net gains on corporate loan sales (1) $ 251 $ 458 1-4 family mortgage loan sales Proceeds from sales $ 55,761 $ 39,507 Less book value of loans sold 54,598 38,680 Net gains on 1-4 family mortgage loan sales (2) 1,163 827 Total net gains on loan sales $ 1,414 $ 1,285 (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)	3 Months Ended
	Mar. 31, 2017
Acquired Loans [Abstract]
Acquired Loans	The following table presents the carrying amount of acquired and covered PCI and non-PCI loans as of March 31, 2017 and December 31, 2016 . Acquired and Covered Loans (1) (Dollar amounts in thousands) As of March 31, 2017 As of December 31, 2016 PCI Non-PCI Total PCI Non-PCI Total Acquired loans $ 169,961 $ 2,101,985 $ 2,271,946 $ 53,772 $ 613,339 $ 667,111 Covered loans 7,746 14,712 22,458 7,895 15,379 23,274 Total acquired and covered loans $ 177,707 $ 2,116,697 $ 2,294,404 $ 61,667 $ 628,718 $ 690,385 (1) Included in loans in the Consolidated Statements of Condition.
FDIC Indemnification Asset Roll Forward	Rollforwards of the carrying value of the FDIC indemnification asset for the quarters ended March 31, 2017 and 2016 are presented in the following table. Changes in the FDIC Indemnification Asset (Dollar amounts in thousands) Quarters Ended 2017 2016 Beginning balance $ 4,522 $ 3,903 Amortization (302 ) (280 ) Change in expected reimbursements from the FDIC for changes in expected credit losses (328 ) 216 Net payments to the FDIC 328 1,841 Ending balance $ 4,220 $ 5,680
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 2017 2016 Beginning balances $ 19,385 $ 24,912 Additions 27,316 3,981 Accretion (3,955 ) (1,546 ) Other (1) (1,497 ) (89 ) Ending balance $ 41,249 $ 27,258 (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)	3 Months Ended
	Mar. 31, 2017
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 March 31, 2017 and December 31, 2016 . 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 (1) 30-89 Days Past Due 90 Days or More Past Due Total Past Due Total Loans Non- accrual (2) 90 Days or More Past Due, Still Accruing Interest As of March 31, 2017 Commercial and industrial $ 3,359,919 $ 7,165 $ 3,696 $ 10,861 $ 3,370,780 $ 21,514 $ 1,251 Agricultural 420,692 1,434 658 2,092 422,784 1,283 — Commercial real estate: Office, retail, and industrial 1,971,050 1,281 16,648 17,929 1,988,979 19,505 52 Multi-family 666,914 4,782 14 4,796 671,710 163 14 Construction 565,710 2,556 194 2,750 568,460 198 — Other commercial real estate 1,352,633 3,563 1,585 5,148 1,357,781 3,858 1 Total commercial real estate 4,556,307 12,182 18,441 30,623 4,586,930 23,724 67 Total corporate loans 8,336,918 20,781 22,795 43,576 8,380,494 46,521 1,318 Home equity 874,810 3,045 2,812 5,857 880,667 4,799 864 1-4 family mortgages 538,177 1,254 717 1,971 540,148 2,974 41 Installment 250,952 1,699 410 2,109 253,061 — 410 Total consumer loans 1,663,939 5,998 3,939 9,937 1,673,876 7,773 1,315 Total loans $ 10,000,857 $ 26,779 $ 26,734 $ 53,513 $ 10,054,370 $ 54,294 $ 2,633 As of December 31, 2016 Commercial and industrial $ 2,816,442 $ 6,426 $ 4,790 $ 11,216 $ 2,827,658 $ 29,938 $ 374 Agricultural 388,596 — 900 900 389,496 181 736 Commercial real estate: Office, retail, and industrial 1,564,007 5,327 12,633 17,960 1,581,967 17,277 1,129 Multi-family 612,446 858 748 1,606 614,052 311 604 Construction 450,927 332 281 613 451,540 286 — Other commercial real estate 974,575 1,307 3,646 4,953 979,528 2,892 1,526 Total commercial real estate 3,601,955 7,824 17,308 25,132 3,627,087 20,766 3,259 Total corporate loans 6,806,993 14,250 22,998 37,248 6,844,241 50,885 4,369 Home equity 740,919 4,545 2,519 7,064 747,983 5,465 109 1-4 family mortgages 420,264 2,652 1,006 3,658 423,922 2,939 272 Installment 236,264 1,476 259 1,735 237,999 — 259 Total consumer loans 1,397,447 8,673 3,784 12,457 1,409,904 8,404 640 Total loans $ 8,204,440 $ 22,923 $ 26,782 $ 49,705 $ 8,254,145 $ 59,289 $ 5,009 (1) PCI loans with an accretable yield are considered current. (2) Includes PCI loans of $387,000 and $682,000 as of March 31, 2017 and December 31, 2016 , respectively, which no longer have an accretable yield as estimates of expected future cash flows have decreased since the acquisition due to credit deterioration.
Allowance for Credit Losses on Financing Receivables	A rollforward of the allowance for credit losses by portfolio segment for the quarters ended March 31, 2017 and 2016 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 Reserve for Unfunded Commitments Total Allowance for Credit Losses Quarter ended March 31, 2017 Beginning balance $ 40,709 $ 17,595 $ 3,261 $ 3,444 $ 7,739 $ 13,335 $ 1,000 $ 87,083 Charge-offs (4,074 ) (127 ) — (5 ) (408 ) (1,664 ) — (6,278 ) Recoveries 1,666 975 28 227 101 443 — 3,440 Net charge-offs (2,408 ) 848 28 222 (307 ) (1,221 ) — (2,838 ) Provision for loan losses and other 3,485 (742 ) (429 ) 444 (510 ) 2,670 — 4,918 Ending balance $ 41,786 $ 17,701 $ 2,860 $ 4,110 $ 6,922 $ 14,784 $ 1,000 $ 89,163 Quarter ended March 31, 2016 Beginning balance $ 37,074 $ 13,124 $ 2,469 $ 1,440 $ 6,109 $ 13,414 $ 1,225 $ 74,855 Charge-offs (1,898 ) (524 ) (204 ) (126 ) (1,445 ) (992 ) — (5,189 ) Recoveries 502 103 25 15 151 320 — 1,116 Net charge-offs (1,396 ) (421 ) (179 ) (111 ) (1,294 ) (672 ) — (4,073 ) Provision for loan losses and other 2,058 1,717 257 1,104 1,773 684 — 7,593 Ending balance $ 37,736 $ 14,420 $ 2,547 $ 2,433 $ 6,588 $ 13,426 $ 1,225 $ 78,375
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 March 31, 2017 and December 31, 2016 . 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 March 31, 2017 Commercial, industrial, and agricultural $ 18,167 $ 3,745,009 $ 30,388 $ 3,793,564 $ 109 $ 41,133 $ 544 $ 41,786 Commercial real estate: Office, retail, and industrial 13,442 1,956,042 19,495 1,988,979 31 16,200 1,470 17,701 Multi-family 396 656,769 14,545 671,710 — 2,784 76 2,860 Construction — 548,280 20,180 568,460 — 3,946 164 4,110 Other commercial real estate 2,493 1,286,300 68,988 1,357,781 18 5,832 1,072 6,922 Total commercial real estate 16,331 4,447,391 123,208 4,586,930 49 28,762 2,782 31,593 Total corporate loans 34,498 8,192,400 153,596 8,380,494 158 69,895 3,326 73,379 Consumer — 1,649,765 24,111 1,673,876 — 13,550 1,234 14,784 Reserve for unfunded commitments — — — — — 1,000 — 1,000 Total loans $ 34,498 $ 9,842,165 $ 177,707 $ 10,054,370 $ 158 $ 84,445 $ 4,560 $ 89,163 As of December 31, 2016 Commercial, industrial, and agricultural $ 24,645 $ 3,189,327 $ 3,182 $ 3,217,154 $ 507 $ 39,554 $ 648 $ 40,709 Commercial real estate: Office, retail, and industrial 16,287 1,553,234 12,446 1,581,967 — 16,148 1,448 17,596 Multi-family 398 601,429 12,225 614,052 — 3,059 202 3,261 Construction 34 447,058 4,448 451,540 — 3,280 164 3,444 Other commercial real estate 1,286 965,900 12,342 979,528 18 6,613 1,108 7,739 Total commercial real estate 18,005 3,567,621 41,461 3,627,087 18 29,100 2,922 32,040 Total corporate loans 42,650 6,756,948 44,643 6,844,241 525 68,654 3,569 72,748 Consumer — 1,392,880 17,024 1,409,904 — 12,210 1,125 13,335 Reserve for unfunded commitments — — — — — 1,000 — 1,000 Total loans $ 42,650 $ 8,149,828 $ 61,667 $ 8,254,145 $ 525 $ 81,864 $ 4,694 $ 87,083
Impaired Financing Receivables	The following table presents loans individually evaluated for impairment by class of loan as of March 31, 2017 and December 31, 2016 . PCI loans are excluded from this disclosure. Impaired Loans Individually Evaluated by Class (Dollar amounts in thousands) As of March 31, 2017 As of December 31, 2016 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 $ 16,781 $ 272 $ 25,299 $ 109 $ 11,579 $ 13,066 $ 29,514 $ 507 Agricultural 1,114 — 1,817 — — — — — Commercial real estate: Office, retail, and industrial 12,732 710 17,723 31 16,287 — 21,057 — Multi-family 396 — 596 — 398 — 398 — Construction — — 315 — 34 — 34 — Other commercial real estate 2,258 235 4,550 18 1,016 270 2,141 18 Total commercial real estate 16,500 945 25,001 49 17,735 270 23,630 18 Total impaired loans individually evaluated for impairment $ 33,281 $ 1,217 $ 50,300 $ 158 $ 29,314 $ 13,336 $ 53,144 $ 525 The following table presents the average recorded investment and interest income recognized on impaired loans by class for the quarters ended March 31, 2017 and 2016 . 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 March 31, 2017 2016 Average Interest Income Recognized (1) Average Interest Income Recognized (1) Commercial and industrial $ 20,849 $ 214 $ 2,794 $ 38 Agricultural 557 — — — Commercial real estate: Office, retail, and industrial 14,865 93 7,923 48 Multi-family 397 28 601 1 Construction 17 136 106 — Other commercial real estate 1,890 12 3,819 19 Total commercial real estate 17,169 269 12,449 68 Total impaired loans $ 38,575 $ 483 $ 15,243 $ 106 (1) Recorded using the cash basis of accounting.
Financing Receivable Credit Quality Indicators	Consumer Credit Quality Indicators by Class (Dollar amounts in thousands) Performing Non-accrual Total As of March 31, 2017 Home equity $ 875,868 $ 4,799 $ 880,667 1-4 family mortgages 537,174 2,974 540,148 Installment 253,061 — 253,061 Total consumer loans $ 1,666,103 $ 7,773 $ 1,673,876 As of December 31, 2016 Home equity $ 727,618 $ 4,986 $ 732,604 1-4 family mortgages 413,415 2,939 416,354 Installment 237,999 — 237,999 Total consumer loans $ 1,379,032 $ 7,925 $ 1,386,957 The following tables present credit quality indicators by class for corporate and consumer loans, as of March 31, 2017 and December 31, 2016 . Corporate Credit Quality Indicators by Class (Dollar amounts in thousands) Pass Special Mention (1) (4) Substandard (2) (4) Non-accrual (3) Total As of March 31, 2017 Commercial and industrial $ 3,134,827 $ 113,944 $ 100,495 $ 21,514 $ 3,370,780 Agricultural 405,354 9,873 6,274 1,283 422,784 Commercial real estate: Office, retail, and industrial 1,887,699 39,545 42,230 19,505 1,988,979 Multi-family 665,313 4,336 1,898 163 671,710 Construction 542,862 8,927 16,473 198 568,460 Other commercial real estate 1,312,347 21,599 19,977 3,858 1,357,781 Total commercial real estate 4,408,221 74,407 80,578 23,724 4,586,930 Total corporate loans $ 7,948,402 $ 198,224 $ 187,347 $ 46,521 $ 8,380,494 As of December 31, 2016 Commercial and industrial $ 2,638,833 $ 92,340 $ 66,547 $ 29,938 $ 2,827,658 Agricultural 366,382 17,039 5,894 181 389,496 Commercial real estate: Office, retail, and industrial 1,491,030 34,007 39,513 17,277 1,581,827 Multi-family 607,324 4,370 2,029 311 614,034 Construction 438,946 111 12,197 286 451,540 Other commercial real estate 951,115 11,808 13,544 2,892 979,359 Total commercial real estate 3,488,415 50,296 67,283 20,766 3,626,760 Total corporate loans $ 6,493,630 $ 159,675 $ 139,724 $ 50,885 $ 6,843,914 (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 $674,000 as of March 31, 2017 and $834,000 as of December 31, 2016 .
Troubled Debt Restructuring Activity Rollforward	The table below presents TDR s by class as of March 31, 2017 and December 31, 2016 . 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 March 31, 2017 As of December 31, 2016 Accruing Non-accrual (1) Total Accruing Non-accrual (1) Total Commercial and industrial $ 278 $ 922 $ 1,200 $ 281 $ 150 $ 431 Agricultural — — — — — — Commercial real estate: Office, retail, and industrial — 864 864 155 4,733 4,888 Multi-family 582 163 745 586 168 754 Construction — — — — — — Other commercial real estate 263 — 263 268 48 316 Total commercial real estate 845 1,027 1,872 1,009 4,949 5,958 Total corporate loans 1,123 1,949 3,072 1,290 5,099 6,389 Home equity 172 795 967 177 820 997 1-4 family mortgages 817 368 1,185 824 378 1,202 Installment — — — — — — Total consumer loans 989 1,163 2,152 1,001 1,198 2,199 Total loans $ 2,112 $ 3,112 $ 5,224 $ 2,291 $ 6,297 $ 8,588 (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 ended March 31, 2017 and 2016 is presented in the following table. TDR Rollforward (Dollar amounts in thousands) Quarters Ended 2017 2016 Accruing Beginning balance $ 2,291 $ 2,743 Additions 922 — Net payments received (24 ) (41 ) Net transfers to non-accrual (1,077 ) — Ending balance 2,112 2,702 Non-accrual Beginning balance 6,297 2,324 Net payments received (4,150 ) (56 ) Charge-offs (112 ) — Net transfers from accruing 1,077 — Ending balance 3,112 2,268 Total TDRs $ 5,224 $ 4,970

Premises, Furniture, and Equi29

Premises, Furniture, and Equipment (Tables)	3 Months Ended
	Mar. 31, 2017
Property, Plant and Equipment [Abstract]
Summary of 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 March 31, December 31, Land $ 29,942 $ 18,304 Premises 138,748 94,369 Furniture and equipment 133,618 105,859 Total cost 302,308 218,532 Accumulated depreciation (178,801 ) (140,030 ) Net book value of premises, furniture, and equipment 123,507 78,502 Assets held-for-sale 17,146 4,075 Total premises, furniture, and equipment $ 140,653 $ 82,577
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 March 31, 2017 . Future Minimum Operating Lease Payments (Dollar amounts in thousands) Total One year or less $ 18,809 After one year to two years 16,591 After two years to three years 16,800 After three years to four years 16,276 After four years to five years 16,190 After five years 124,340 Total minimum lease payments $ 209,006
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 829 After two years to three years 658 After three years to four years 648 After four years to five years 648 After five years 3,835 Total accretion $ 7,798
Schedule Of Net Operating Lease Expense	The following table presents net operating lease expense for the quarters ended March 31, 2017 and 2016 . Net Operating Lease Expense (Dollar amounts in thousands) Quarters Ended 2017 2016 Lease expense charged to operations $ 4,559 $ 1,727 Accretion of operating lease intangible (1) (295 ) (286 ) Accretion of deferred gain on sale-leaseback transaction (1) (1,473 ) — Rental income from premises leased to others (1) (181 ) (158 ) Net operating lease expense $ 2,610 $ 1,283 (1) Included as reductions to net occupancy and equipment expense in the Condensed Consolidated Statements of Income.

Goodwill and Other Intangible30

Goodwill and Other Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	The following table presents changes in the carrying amount of goodwill for the quarters ended March 31, 2017 and 2016 . Changes in the Carrying Amount of Goodwill (Dollar amounts in thousands) Quarters Ended March 31, 2017 2016 Beginning balance $ 340,879 $ 319,007 Acquisitions 350,693 20,761 Ending balance $ 691,572 $ 339,768
Schedule of Finite-Lived Intangible Assets	Other Intangible Assets (Dollar amounts in thousands) Three Months Ended March 31, 2017 2016 Gross Accumulated Amortization Net Gross Accumulated Amortization Net Beginning balance $ 58,959 $ 32,962 $ 25,997 $ 48,550 $ 28,280 $ 20,270 Additions 39,017 — 39,017 10,925 — 10,925 Amortization expense — 1,965 (1,965 ) — 985 (985 ) Ending balance $ 97,976 $ 34,927 $ 63,049 $ 59,475 $ 29,265 $ 30,210
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	Scheduled Amortization of Other Intangible Assets (Dollar amounts in thousands) Total Year Ending March 31, 2017 2018 $ 7,702 2019 7,108 2020 7,064 2021 7,009 2022 6,922 2023 and thereafter 27,244 Total $ 63,049

Deposits (Tables)

Deposits (Tables)	3 Months Ended
	Mar. 31, 2017
Deposits [Abstract]
Schedule Of Deposits	The following table presents the Company's deposits by type. Summary of Deposits (Dollar amounts in thousands) As of March 31, December 31, Demand deposits $ 3,492,987 $ 2,766,748 Savings deposits 2,073,518 1,615,833 NOW accounts 1,876,215 1,675,421 Money market deposits 1,972,566 1,577,316 Time deposits less than $100,000 918,092 755,558 Time deposits greater than $100,000 623,163 437,727 Total deposits $ 10,956,541 $ 8,828,603

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	3 Months Ended
	Mar. 31, 2017
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 2017 2016 Net income $ 22,855 $ 17,962 Net income applicable to non-vested restricted shares (234 ) (212 ) Net income applicable to common shares $ 22,621 $ 17,750 Weighted-average common shares outstanding: Weighted-average common shares outstanding (basic) 100,411 77,980 Dilutive effect of common stock equivalents 21 12 Weighted-average diluted common shares outstanding 100,432 77,992 Basic EPS $ 0.23 $ 0.23 Diluted EPS $ 0.23 $ 0.23 Anti-dilutive shares not included in the computation of diluted EPS (1) 343 608 (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)	3 Months Ended
	Mar. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Interest Rate Derivatives	Fair Value Hedges (Dollar amounts in thousands) As of March 31, 2017 December 31, 2016 Gross notional amount outstanding $ 5,833 $ 5,958 Derivative liability fair value (226 ) (282 ) Weighted-average interest rate received 2.83 % 2.63 % Weighted-average interest rate paid 5.96 % 5.96 % Weighted-average maturity (in years) 1.60 1.84 Fair value of derivative (1) $ 240 $ 296 (1) This amount represents the fair value if credit risk related contingent features were triggered. Cash Flow Hedges (Dollar amounts in thousands) As of March 31, 2017 December 31, 2016 Gross notional amount outstanding $ 1,960,000 $ 1,470,000 Derivative asset fair value 4,078 5,402 Derivative liability fair value (8,286 ) (7,390 ) Weighted-average interest rate received 1.42 % 1.37 % Weighted-average interest rate paid 1.23 % 1.11 % Weighted-average maturity (in years) 3.00 2.83
Schedule of Derivative Instruments	Other Derivative Instruments (Dollar amounts in thousands) As of March 31, 2017 December 31, 2016 Gross notional amount outstanding $ 2,100,325 $ 1,656,612 Derivative asset fair value 15,722 13,478 Derivative liability fair value (15,722 ) (13,478 ) Fair value of derivative (1) 16,340 13,753 (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 March 31, 2017 and December 31, 2016 . Fair Value of Offsetting Derivatives (Dollar amounts in thousands) As of March 31, 2017 As of December 31, 2016 Assets Liabilities Assets Liabilities Gross amounts recognized $ 19,800 $ 24,234 $ 18,880 $ 21,150 Less: amounts offset in the Consolidated Statements of Financial Condition — — — — Net amount presented in the Consolidated Statements of Financial Condition (1) 19,800 24,234 18,880 21,150 Gross amounts not offset in the Consolidated Statements of Financial Condition: Offsetting derivative positions (11,293 ) (11,293 ) (10,889 ) (10,889 ) Cash collateral pledged — (12,941 ) — (10,261 ) Net credit exposure $ 8,507 $ — $ 7,991 $ — (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 March 31, 2017 and December 31, 2016 . Fair Value of Offsetting Derivatives (Dollar amounts in thousands) As of March 31, 2017 As of December 31, 2016 Assets Liabilities Assets Liabilities Gross amounts recognized $ 19,800 $ 24,234 $ 18,880 $ 21,150 Less: amounts offset in the Consolidated Statements of Financial Condition — — — — Net amount presented in the Consolidated Statements of Financial Condition (1) 19,800 24,234 18,880 21,150 Gross amounts not offset in the Consolidated Statements of Financial Condition: Offsetting derivative positions (11,293 ) (11,293 ) (10,889 ) (10,889 ) Cash collateral pledged — (12,941 ) — (10,261 ) Net credit exposure $ 8,507 $ — $ 7,991 $ — (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)	3 Months Ended
	Mar. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments Disclosure	Contractual or Notional Amounts of Financial Instruments (Dollar amounts in thousands) As of March 31, 2017 December 31, 2016 Commitments to extend credit: Commercial, industrial, and agricultural $ 1,737,410 $ 1,522,152 Commercial real estate 427,425 397,423 Home equity 486,880 426,384 Other commitments (1) 250,123 214,943 Total commitments to extend credit $ 2,901,838 $ 2,560,902 Letters of credit $ 146,632 $ 100,430 Recourse on assets sold: Unpaid principal balance of loans sold $ 185,101 $ 187,158 Carrying value of recourse obligation (2) 150 142 (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)	3 Months Ended
	Mar. 31, 2017
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 March 31, 2017 As of December 31, 2016 Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Assets: Trading securities: Money market funds $ 1,768 $ — $ — $ 1,645 $ — $ — Mutual funds 17,362 — — 16,275 — — Total trading securities 19,130 — — 17,920 — — Securities available-for-sale: U.S. treasury securities 48,516 — — 48,541 — — U.S. agency securities — 181,030 — — 183,637 — CMOs — 1,051,364 — — 1,047,446 — MBSs — 352,966 — — 332,655 — Municipal securities — 262,710 — — 270,846 — CDOs — — 33,436 — — 33,260 Equity securities — 7,102 — — 3,065 — Total securities available-for-sale 48,516 1,855,172 33,436 48,541 1,837,649 33,260 Mortgage servicing rights ("MSRs") (1) — — 6,245 6,120 Derivative assets (1) — 19,800 — — 18,880 — Liabilities: Derivative liabilities (2) $ — $ 24,234 $ — $ — $ 21,150 $ — (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 calculated using the weighted-average of the Issuers used by the Company as of March 31, 2017 and December 31, 2016. Significant Unobservable Inputs Used in the Valuation of CDOs As of March 31, 2017 December 31, 2016 Probability of prepayment 0.0 % - 10.9% 0.0 % - 10.9% Probability of default 16.6 % - 44.1% 16.7 % - 46.8% Loss given default 93.3 % - 99.1% 93.3 % - 98.9% Probability of deferral cure 0.0 % - 100.0% 7.6 % - 100.0% The following table presents the ranges of significant, unobservable inputs used by the Company to determine the fair value of MSR s as of March 31, 2017 . Significant Unobservable Inputs Used in the Valuation of MSR s As of March 31, 2017 December 31, 2016 Prepayment speed 7.7 % - 25.5% 7.7 % - 22.8% Maturity (months) 10 - 102 12 - 103 Discount rate 9.5 % - 13.0% 9.5 % - 13.0%
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation	A rollforward of the carrying value of CDOs for the quarters ended March 31, 2017 and 2016 is presented in the following table. Carrying Value of CDOs (Dollar amounts in thousands) Quarters Ended 2017 2016 Beginning balance $ 33,260 $ 31,529 Change in other comprehensive income (1) 129 (786 ) Other 47 14 Ending balance $ 33,436 $ 30,757 (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 calculated using the weighted-average of the Issuers used by the Company as of March 31, 2017 and December 31, 2016. Significant Unobservable Inputs Used in the Valuation of CDOs As of March 31, 2017 December 31, 2016 Probability of prepayment 0.0 % - 10.9% 0.0 % - 10.9% Probability of default 16.6 % - 44.1% 16.7 % - 46.8% Loss given default 93.3 % - 99.1% 93.3 % - 98.9% Probability of deferral cure 0.0 % - 100.0% 7.6 % - 100.0% The following table presents the ranges of significant, unobservable inputs used by the Company to determine the fair value of MSR s as of March 31, 2017 . Significant Unobservable Inputs Used in the Valuation of MSR s As of March 31, 2017 December 31, 2016 Prepayment speed 7.7 % - 25.5% 7.7 % - 22.8% Maturity (months) 10 - 102 12 - 103 Discount rate 9.5 % - 13.0% 9.5 % - 13.0%
Schedule of Servicing Assets at Fair Value	A rollforward of the carrying value of MSR s for the quarters ended March 31, 2017 and 2016 is presented in the following table. Carrying Value of MSR s (Dollar amounts in thousands) Quarters Ended 2017 2016 Beginning balance $ 6,120 $ 1,853 Additions from acquisition — 3,092 New MSRs 156 185 Total gains (losses) included in earnings (1) : Changes in valuation inputs and assumptions 172 (40 ) Other changes in fair value (2) (203 ) (68 ) Ending balance $ 6,245 $ 5,022 Contractual servicing fees earned (1) $ 395 $ 183 (1) Included in mortgage banking income in the Condensed Consolidated Statements of Income and related to assets held as of March 31, 2017 and 2016 . (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 March 31, 2017 As of December 31, 2016 Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Collateral-dependent impaired loans (1) $ — $ — $ 11,528 $ — $ — $ 22,019 OREO (2) — — 780 — — 8,624 Loans held-for-sale (3) — — 9,144 — — 10,484 Assets held-for-sale (4) — — 17,146 — — 4,075 (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 March 31, 2017 December 31, 2016 Fair Value Hierarchy Level Carrying Amount Fair Value Carrying Amount Fair Value Assets: Cash and due from banks 1 $ 174,268 $ 174,268 $ 155,055 $ 155,055 Interest-bearing deposits in other banks 2 74,892 74,892 107,093 107,093 Securities held-to-maturity 2 17,742 15,118 22,291 18,212 FHLB and FRB stock 2 46,306 46,306 59,131 59,131 Loans 3 9,970,427 9,712,763 8,172,584 7,973,845 Investment in BOLI 3 276,960 276,960 219,746 219,746 Accrued interest receivable 3 39,868 39,868 34,384 34,384 Other interest-earning assets 3 635 635 834 834 Liabilities: Deposits 2 $ 10,956,541 $ 10,945,331 $ 8,828,603 $ 8,820,572 Borrowed funds 2 547,923 547,923 879,008 879,008 Senior and subordinated debt 2 194,745 202,522 194,603 197,888 Accrued interest payable 2 2,564 2,564 3,416 3,416

Recent Accounting Pronounceme36

Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Share-based compensation tax benefit	$ 638
Deferred gain, net	$ 79,500	$ 82,500

Acquisitions (Details) - Narrat

Acquisitions (Details) - Narrative $ / shares in Units, $ in Thousands	Jan. 06, 2017USD ($)$ / sharesshares	Mar. 08, 2016USD ($)locationshares	Mar. 31, 2017USD ($)	Mar. 31, 2016USD ($)	Dec. 31, 2017USD ($)	Feb. 28, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Business Acquisition [Line Items]
Goodwill			$ 691,572	$ 339,768			$ 340,879	$ 319,007
Acquisition and integration related expenses			18,565	$ 5,020
Standard Bancshares, Inc.
Business Acquisition [Line Items]
Fixed exchange ratio (in shares) | shares	0.4350
Consideration transferred	$ 580,715
Common stock, shares issued (in shares) | shares	21,057,085
Cash paid	$ 47,125
Goodwill	$ 339,298
Acquisition and integration related expenses			17,500
Standard Bancshares, Inc. | Forecast
Business Acquisition [Line Items]
Acquisition and integration related expenses					$ 27,000
Premier Asset Management LLC
Business Acquisition [Line Items]
Assets under management acquired						$ 550,000
NI Bancshares Corporation
Business Acquisition [Line Items]
Consideration transferred		$ 70,082
Common stock, shares issued (in shares) | shares		3,042,494
Cash paid		$ 15,186
Goodwill		$ 22,174
Number of retail branches acquired | location		10
Minimum value of trust assets under management acquired		$ 700,000
Goodwill adjustment			$ 423
Standard Bancshares, Inc.
Business Acquisition [Line Items]
Share price (in dollars per share) | $ / shares	$ 11.02
First Midwest Bancorp, Inc
Business Acquisition [Line Items]
Share price (in dollars per share) | $ / shares	$ 25.34

Acquisitions (Details) - Acquis

Acquisitions (Details) - Acquisition Activity - USD ($) $ / shares in Units, $ in Thousands	Jan. 06, 2017	Mar. 08, 2016	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Assets
Goodwill			$ 691,572	$ 340,879	$ 339,768	$ 319,007
Liabilities
Intangible liabilities			$ 7,798
Standard Bancshares, Inc.
Assets
Cash and due from banks and interest-bearing deposits in other banks	$ 102,149
Securities available-for-sale	214,107
Securities held-to-maturity	0
FHLB and FRB stock	3,247
Loans	1,769,709
OREO	8,427
Investment in BOLI	55,629
Goodwill	339,298
Other intangible assets	31,072
Premises, furniture, and equipment	59,163
Accrued interest receivable and other assets	56,077
Total assets	2,638,878
Liabilities
Noninterest-bearing deposits	675,354
Interest-bearing deposits	1,348,520
Total deposits	2,023,874
Borrowed funds	0
Intangible liabilities	0
Accrued interest payable and other liabilities	34,289
Total liabilities	2,058,163
Consideration Paid
Common stock (2017 - 21,057,085 shares issued at $25.34 per share, 2016 - 3,042,494 shares issued at $18.059 per share), net of issuance costs	533,590
Cash paid	47,125
Total consideration paid	$ 580,715
Common stock, shares issued (in shares)	21,057,085
Shares issued (in Dollars per share)	$ 25.34
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		396,181
OREO		2,863
Investment in BOLI		8,384
Goodwill		22,174
Other intangible assets		10,408
Premises, furniture, and equipment		19,636
Accrued interest receivable and other assets		16,453
Total assets		677,888
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		10,239
Total liabilities		607,806
Consideration Paid
Common stock (2017 - 21,057,085 shares issued at $25.34 per share, 2016 - 3,042,494 shares issued at $18.059 per share), net of issuance costs		54,896
Cash paid		15,186
Total consideration paid		$ 70,082
Common stock, shares issued (in shares)		3,042,494
Shares issued (in Dollars per share)		$ 18.059

Acquisitions (Details) - Unaudi

Acquisitions (Details) - Unaudited Pro Forma Combined Results of Operations (Details) - Standard Bancshares, Inc. - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Business Acquisition [Line Items]
Total revenues	[1]	$ 156,757	$ 143,345
Net income		$ 32,734	$ 22,950
[1]	Includes net interest income and total noninterest income.

Acquisitions (Details) - Acquir

Acquisitions (Details) - Acquired Loans - Acquired loans - Standard Bancshares, Inc. $ in Thousands	Jan. 06, 2017USD ($)
Business Acquisition [Line Items]
Fair value of acquired loans	$ 1,646,066
Contractually required principal and interest payments	1,940,459
Best estimate of contractual cash flows not expected to be collected	100,918	[1]
Best estimate of contractual cash flows expected to be collected	1,839,541
Receivables acquired with deteriorated credit quality
Business Acquisition [Line Items]
Fair value of acquired loans	123,643
Contractually required principal and interest payments	208,586
Best estimate of contractual cash flows not expected to be collected	57,626	[1]
Best estimate of contractual cash flows expected to be collected	$ 150,960
[1]	Includes interest payments not expected to be collected due to loan prepayments as well as principal and interest payments not expected to be collected due to customer default.

Securities (Details) - Securiti

Securities (Details) - Securities Portfolio - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Schedule of Trading Securities and Other Trading Assets [Line Items]
Trading Securities	$ 19,130	$ 17,920
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,971,960	1,957,584
Gross Unrealized Gains	5,310	4,562
Gross Unrealized Losses	(40,146)	(42,696)
Fair Value	1,937,124	1,919,450
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	17,742	22,291
Municipal securities, Fair Value	15,118
U.S. treasury securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	48,574	48,581
Gross Unrealized Gains	23	26
Gross Unrealized Losses	(81)	(66)
Fair Value	48,516	48,541
U.S. agency securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	180,894	183,528
Gross Unrealized Gains	518	519
Gross Unrealized Losses	(382)	(410)
Fair Value	181,030	183,637
Collateralized mortgage obligations (CMOs)
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,066,439	1,064,130
Gross Unrealized Gains	1,039	969
Gross Unrealized Losses	(16,114)	(17,653)
Fair Value	1,051,364	1,047,446
Other mortgage-backed securities (MBSs)
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	357,473	337,139
Gross Unrealized Gains	1,230	1,395
Gross Unrealized Losses	(5,737)	(5,879)
Fair Value	352,966	332,655
Municipal securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	263,606	273,319
Gross Unrealized Gains	2,092	1,245
Gross Unrealized Losses	(2,988)	(3,718)
Fair Value	262,710	270,846
Trust-preferred collateralized debt obligations (CDOs)
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	47,728	47,681
Gross Unrealized Gains	260	261
Gross Unrealized Losses	(14,552)	(14,682)
Fair Value	33,436	33,260
Equity securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	7,246	3,206
Gross Unrealized Gains	148	147
Gross Unrealized Losses	(292)	(288)
Fair Value	7,102	3,065
Trading Securities
Schedule of Trading Securities and Other Trading Assets [Line Items]
Trading Securities	19,130	17,920
Municipal securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	17,742	22,291
Municipal securities, Gross Unrealized Gains	0	0
Municipal securities, Gross Unrealized Losses	(2,624)	(4,079)
Municipal securities, Fair Value	$ 15,118	$ 18,212

Securities (Details) - Remainin

Securities (Details) - Remaining Contractual Maturity of Securities - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Available-for-sale Securities, Amortized Cost Basis [Abstract]
One year or less	$ 90,123
After one year to five years	399,483
After five years to ten years	3,470
After ten years	47,726
Securities that do not have a single contractual maturity date	1,431,158
Amortized Cost	1,971,960	$ 1,957,584
Available-for-sale Securities, Fair Value [Abstract]
One year or less	87,605
After one year to five years	388,321
After five years to ten years	3,373
After ten years	46,393
Securities that do not have a single contractual maturity date	1,411,432
Fair Value	1,937,124	1,919,450
Held-to-maturity Securities, Amortized Cost [Abstract]
One year or less	1,926
After one year to five years	6,834
After five years to ten years	2,975
After ten years	6,007
Securities that do not have a single contractual maturity date	0
Amortized Cost	17,742	$ 22,291
Held-to-maturity Securities, Fair Value [Abstract]
One year or less	1,641
After one year to five years	5,823
After five years to ten years	2,535
After ten years	5,119
Securities that do not have a single contractual maturity date	0
Fair Value	$ 15,118

Securities (Details) - Narrativ

Securities (Details) - Narrative - USD ($)	3 Months Ended
	Mar. 31, 2017	Jan. 06, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Available-for-sale securities pledged as collateral	$ 1,100,000,000		$ 1,100,000,000
Held-to-maturity securities pledged as collateral	0		$ 0
Carrying value of securities sold	$ 210,200,000
Standard Bancshares, Inc.
Business Acquisition [Line Items]
Securities available-for-sale		$ 214,107,000

Securities (Details) - Securi44

Securities (Details) - Securities Gains (Losses) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Gains on sales of securities:
Gross realized gains	$ 0	$ 930
Gross realized losses	0	(43)
Net realized gains on sales of securities	0	887
Non-cash impairment charges:
Other-than-temporary securities impairment (OTTI)	0	0
Net realized gains	$ 0	$ 887

Securities (Details) - Changes

Securities (Details) - Changes In Credit Losses Recognized In Earnings - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Changes in Credit Losses Recognized in Earnings [Roll Forward]
Beginning balance		$ 23,345	$ 23,709
OTTI included in earnings:
Reduction for sales of securities	[1]	0	0
Ending balance		$ 23,345	$ 23,709
[1]	Included in net securities gains in the Condensed Consolidated Statements of Income.

Securities (Details) - Securi46

Securities (Details) - Securities In An Unrealized Loss Position $ in Thousands	Mar. 31, 2017USD ($)security	Dec. 31, 2016USD ($)security
Securities (Details) - Securities In An Unrealized Loss Position [Line Items]
Number of Securities | security	597	695
Fair Value - Less Than 12 Months	$ 1,271,882	$ 974,337
Unrealized Losses - Less Than 12 Months	20,243	18,720
Fair Value - 12 Months or Longer	215,369	567,538
Unrealized Losses - 12 Months or Longer	19,903	23,976
Fair Value - Total	1,487,251	1,541,875
Unrealized Losses - Total	$ 40,146	$ 42,696
U.S. treasury securities
Securities (Details) - Securities In An Unrealized Loss Position [Line Items]
Number of Securities | security	17	16
Fair Value - Less Than 12 Months	$ 35,481	$ 33,505
Unrealized Losses - Less Than 12 Months	75	61
Fair Value - 12 Months or Longer	3,995	3,995
Unrealized Losses - 12 Months or Longer	6	5
Fair Value - Total	39,476	37,500
Unrealized Losses - Total	$ 81	$ 66
U.S. agency securities
Securities (Details) - Securities In An Unrealized Loss Position [Line Items]
Number of Securities | security	30	28
Fair Value - Less Than 12 Months	$ 70,426	$ 62,064
Unrealized Losses - Less Than 12 Months	358	364
Fair Value - 12 Months or Longer	6,928	11,814
Unrealized Losses - 12 Months or Longer	24	46
Fair Value - Total	77,354	73,878
Unrealized Losses - Total	$ 382	$ 410
CMOs
Securities (Details) - Securities In An Unrealized Loss Position [Line Items]
Number of Securities | security	196	194
Fair Value - Less Than 12 Months	$ 781,003	$ 523,233
Unrealized Losses - Less Than 12 Months	12,259	10,309
Fair Value - 12 Months or Longer	128,464	411,758
Unrealized Losses - 12 Months or Longer	3,855	7,344
Fair Value - Total	909,467	934,991
Unrealized Losses - Total	$ 16,114	$ 17,653
MBSs
Securities (Details) - Securities In An Unrealized Loss Position [Line Items]
Number of Securities | security	73	68
Fair Value - Less Than 12 Months	$ 290,278	$ 221,174
Unrealized Losses - Less Than 12 Months	5,180	4,726
Fair Value - 12 Months or Longer	17,013	77,780
Unrealized Losses - 12 Months or Longer	557	1,154
Fair Value - Total	307,291	298,954
Unrealized Losses - Total	$ 5,737	$ 5,880
Municipal securities
Securities (Details) - Securities In An Unrealized Loss Position [Line Items]
Number of Securities | security	272	380
Fair Value - Less Than 12 Months	$ 94,694	$ 133,957
Unrealized Losses - Less Than 12 Months	2,371	3,059
Fair Value - 12 Months or Longer	21,520	29,280
Unrealized Losses - 12 Months or Longer	617	659
Fair Value - Total	116,214	163,237
Unrealized Losses - Total	$ 2,988	$ 3,718
CDOs
Securities (Details) - Securities In An Unrealized Loss Position [Line Items]
Number of Securities | security	7	7
Fair Value - Less Than 12 Months	$ 0	$ 0
Unrealized Losses - Less Than 12 Months	0	0
Fair Value - 12 Months or Longer	30,762	30,592
Unrealized Losses - 12 Months or Longer	14,552	14,682
Fair Value - Total	30,762	30,592
Unrealized Losses - Total	$ 14,552	$ 14,682
Equity securities
Securities (Details) - Securities In An Unrealized Loss Position [Line Items]
Number of Securities | security	2	2
Fair Value - Less Than 12 Months	$ 0	$ 404
Unrealized Losses - Less Than 12 Months	0	201
Fair Value - 12 Months or Longer	6,687	2,319
Unrealized Losses - 12 Months or Longer	292	86
Fair Value - Total	6,687	2,723
Unrealized Losses - Total	$ 292	$ 287
Municipal securities
Schedule of Held-to-maturity Securities [Line Items]
Number of Securities | security	13	14
Fair Value - Less Than 12 Months	$ 0	$ 0
Unrealized Loss - Less Than 12 Months	0	0
Fair Value - 12 Months or Longer	15,118	18,212
Unrealized Losses - 12 Months or Longer	2,624	4,079
Fair Value - Total	15,118	18,212
Unrealized Losses - Total	$ 2,624	$ 4,079

Loans (Details) - Loan Portfoli

Loans (Details) - Loan Portfolio - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 10,054,370	$ 8,254,145
Deferred loan fees included in total loans	4,429	3,838
Overdrawn demand deposits included in total loans	6,303	7,836
Commercial, industrial, and agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	3,793,564	3,217,154
Commercial, industrial, and agricultural | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	3,370,780	2,827,658
Total Loans	3,370,780	2,827,658
Commercial, industrial, and agricultural | Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	422,784	389,496
Total Loans	422,784	389,496
Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	4,586,930	3,627,087
Total Loans	4,586,930	3,627,087
Commercial real estate loans | Office, retail, and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,988,979	1,581,967
Total Loans	1,988,979	1,581,967
Commercial real estate loans | Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	671,710	614,052
Total Loans	671,710	614,052
Commercial real estate loans | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	568,460	451,540
Total Loans	568,460	451,540
Commercial real estate loans | Other commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,357,781	979,528
Total Loans	1,357,781	979,528
Total corporate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	8,380,494	6,844,241
Total Loans	8,380,494	6,844,241
Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,673,876	1,409,904
Total Loans	1,673,876	1,409,904
Consumer loans | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	880,667	747,983
Total Loans	880,667	747,983
Consumer loans | 1-4 family mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	540,148	423,922
Total Loans	540,148	423,922
Consumer loans | Installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	253,061	237,999
Total Loans	$ 253,061	$ 237,999

Loans (Details) - Loans Sales

Loans (Details) - Loans Sales - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total net gains on loan sales		$ 1,414	$ 1,285
Corporate loan sales
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sales		15,368	9,588
Less book value of loans sold		15,117	9,130
Total net gains on loan sales	[1]	251	458
1-4 family mortgage loan sales
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sales		55,761	39,507
Less book value of loans sold		54,598	38,680
Total net gains on loan sales	[2]	$ 1,163	$ 827
[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		Mar. 31, 2017	Dec. 31, 2016
Acquired Loans (Details) - Acquired Loans [Line Items]
Non-PCI	[1]	$ 2,116,697	$ 628,718
Total	[1]	2,294,404	690,385
Acquired loans
Acquired Loans (Details) - Acquired Loans [Line Items]
Non-PCI	[1]	2,101,985	613,339
Total	[1]	2,271,946	667,111
Covered loans
Acquired Loans (Details) - Acquired Loans [Line Items]
Non-PCI	[1]	14,712	15,379
Total	[1]	22,458	23,274
Receivables acquired with deteriorated credit quality
Acquired Loans (Details) - Acquired Loans [Line Items]
PCI	[1]	177,707	61,667
Receivables acquired with deteriorated credit quality | Acquired loans
Acquired Loans (Details) - Acquired Loans [Line Items]
PCI	[1]	169,961	53,772
Receivables acquired with deteriorated credit quality | Covered loans
Acquired Loans (Details) - Acquired Loans [Line Items]
PCI	[1]	$ 7,746	$ 7,895
[1]	Included in loans in the Consolidated Statements of Condition.

Acquired and Covered Loans (D50

Acquired and Covered Loans (Details) - Narrative - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Acquired Loans [Abstract]
Outstanding balance of PCI loans	$ 251,200		$ 84,800
Renewed non-purchased credit impaired loans	170,900		$ 117,600
Certain Loans Acquired in Transfer Accounted for as Debt Securities Accretable Yield Movement Schedule [Line Items]
Accretion on acquired loans	3,955	$ 1,546
Acquired and Covered Receivables
Certain Loans Acquired in Transfer Accounted for as Debt Securities Accretable Yield Movement Schedule [Line Items]
Accretion on acquired loans	$ 11,300	$ 2,400

Acquired and Covered Loans (D51

Acquired and Covered Loans (Details) - Changes in FDIC Indemnification Asset - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
FDIC Indemnification Asset [Roll Forward]
Beginning balance	$ 4,522	$ 3,903
Amortization	(302)	(280)
Change in expected reimbursements from the FDIC for changes in expected credit losses	(328)	216
Net payments to the FDIC	328	1,841
Ending balance	$ 4,220	$ 5,680

Acquired and Covered Loans (D52

Acquired and Covered Loans (Details) - Changes in Accretable Yield - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Changes in Accretable Yield [Roll Forward]
Beginning balances		$ 19,385	$ 24,912
Additions		27,316	3,981
Accretion		(3,955)	(1,546)
Other	[1]	(1,497)	(89)
Ending balance		$ 41,249	$ 27,258
[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 For53

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 ($)		Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	[1]	$ 10,000,857,000	$ 8,204,440,000
Total Past Due		53,513,000	49,705,000
Total Loans		10,054,370,000	8,254,145,000
Non- accrual	[2]	54,294,000	59,289,000
90 Days or More Past Due, Still Accruing Interest		2,633,000	5,009,000
30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		26,779,000	22,923,000
90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		26,734,000	26,782,000
Commercial, industrial, and agricultural
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans		3,793,564,000	3,217,154,000
Commercial, industrial, and agricultural | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	[1]	3,359,919,000	2,816,442,000
Total Past Due		10,861,000	11,216,000
Total Loans		3,370,780,000	2,827,658,000
Non- accrual	[2]	21,514,000	29,938,000
90 Days or More Past Due, Still Accruing Interest		1,251,000	374,000
Commercial, industrial, and agricultural | Agricultural
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	[1]	420,692,000	388,596,000
Total Past Due		2,092,000	900,000
Total Loans		422,784,000	389,496,000
Non- accrual	[2]	1,283,000	181,000
90 Days or More Past Due, Still Accruing Interest		0	736,000
Commercial, industrial, and agricultural | 30-89 Days Past Due | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		7,165,000	6,426,000
Commercial, industrial, and agricultural | 30-89 Days Past Due | Agricultural
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,434,000	0
Commercial, industrial, and agricultural | 90 Days or More Past Due | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		3,696,000	4,790,000
Commercial, industrial, and agricultural | 90 Days or More Past Due | Agricultural
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		658,000	900,000
Commercial real estate loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	[1]	4,556,307,000	3,601,955,000
Total Past Due		30,623,000	25,132,000
Total Loans		4,586,930,000	3,627,087,000
Non- accrual	[2]	23,724,000	20,766,000
90 Days or More Past Due, Still Accruing Interest		67,000	3,259,000
Commercial real estate loans | Office, retail, and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	[1]	1,971,050,000	1,564,007,000
Total Past Due		17,929,000	17,960,000
Total Loans		1,988,979,000	1,581,967,000
Non- accrual	[2]	19,505,000	17,277,000
90 Days or More Past Due, Still Accruing Interest		52,000	1,129,000
Commercial real estate loans | Multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	[1]	666,914,000	612,446,000
Total Past Due		4,796,000	1,606,000
Total Loans		671,710,000	614,052,000
Non- accrual	[2]	163,000	311,000
90 Days or More Past Due, Still Accruing Interest		14,000	604,000
Commercial real estate loans | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	[1]	565,710,000	450,927,000
Total Past Due		2,750,000	613,000
Total Loans		568,460,000	451,540,000
Non- accrual	[2]	198,000	286,000
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	[1]	1,352,633,000	974,575,000
Total Past Due		5,148,000	4,953,000
Total Loans		1,357,781,000	979,528,000
Non- accrual	[2]	3,858,000	2,892,000
90 Days or More Past Due, Still Accruing Interest		1,000	1,526,000
Commercial real estate loans | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		12,182,000	7,824,000
Commercial real estate loans | 30-89 Days Past Due | Office, retail, and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,281,000	5,327,000
Commercial real estate loans | 30-89 Days Past Due | Multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		4,782,000	858,000
Commercial real estate loans | 30-89 Days Past Due | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		2,556,000	332,000
Commercial real estate loans | 30-89 Days Past Due | Other commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		3,563,000	1,307,000
Commercial real estate loans | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		18,441,000	17,308,000
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		16,648,000	12,633,000
Commercial real estate loans | 90 Days or More Past Due | Multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		14,000	748,000
Commercial real estate loans | 90 Days or More Past Due | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		194,000	281,000
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		1,585,000	3,646,000
Total corporate loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	[1]	8,336,918,000	6,806,993,000
Total Past Due		43,576,000	37,248,000
Total Loans		8,380,494,000	6,844,241,000
Non- accrual	[2]	46,521,000	50,885,000
90 Days or More Past Due, Still Accruing Interest		1,318,000	4,369,000
Total corporate loans | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		20,781,000	14,250,000
Total corporate loans | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		22,795,000	22,998,000
Consumer loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	[1]	1,663,939,000	1,397,447,000
Total Past Due		9,937,000	12,457,000
Total Loans		1,673,876,000	1,409,904,000
Non- accrual	[2]	7,773,000	8,404,000
90 Days or More Past Due, Still Accruing Interest		1,315,000	640,000
Consumer loans | Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	[1]	874,810,000	740,919,000
Total Past Due		5,857,000	7,064,000
Total Loans		880,667,000	747,983,000
Non- accrual	[2]	4,799,000	5,465,000
90 Days or More Past Due, Still Accruing Interest		864,000	109,000
Consumer loans | 1-4 family mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	[1]	538,177,000	420,264,000
Total Past Due		1,971,000	3,658,000
Total Loans		540,148,000	423,922,000
Non- accrual	[2]	2,974,000	2,939,000
90 Days or More Past Due, Still Accruing Interest		41,000	272,000
Consumer loans | Installment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	[1]	250,952,000	236,264,000
Total Past Due		2,109,000	1,735,000
Total Loans		253,061,000	237,999,000
Non- accrual	[2]	0	0
90 Days or More Past Due, Still Accruing Interest		410,000	259,000
Consumer loans | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		5,998,000	8,673,000
Consumer loans | 30-89 Days Past Due | Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		3,045,000	4,545,000
Consumer loans | 30-89 Days Past Due | 1-4 family mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,254,000	2,652,000
Consumer loans | 30-89 Days Past Due | Installment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,699,000	1,476,000
Consumer loans | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		3,939,000	3,784,000
Consumer loans | 90 Days or More Past Due | Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		2,812,000	2,519,000
Consumer loans | 90 Days or More Past Due | 1-4 family mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		717,000	1,006,000
Consumer loans | 90 Days or More Past Due | Installment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		410,000	259,000
Receivables acquired with deteriorated credit quality
Financing Receivable, Recorded Investment, Past Due [Line Items]
PCI	[3]	177,707,000	61,667,000
Receivables acquired with deteriorated credit quality | Commercial, industrial, and agricultural
Financing Receivable, Recorded Investment, Past Due [Line Items]
PCI		30,388,000	3,182,000
Receivables acquired with deteriorated credit quality | Commercial real estate loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
PCI		123,208,000	41,461,000
Receivables acquired with deteriorated credit quality | Total corporate loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
PCI		153,596,000	44,643,000
Receivables acquired with deteriorated credit quality | Consumer loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
PCI		24,111,000	17,024,000
Receivables acquired with deteriorated credit quality | Non-accrual
Financing Receivable, Recorded Investment, Past Due [Line Items]
PCI		$ 387,000	$ 682,000
[1]	PCI loans with an accretable yield are considered current.
[2]	Includes PCI loans of $387,000 and $682,000 as of March 31, 2017 and December 31, 2016, respectively, which no longer have an accretable yield as estimates of expected future cash flows have decreased since the acquisition due to credit deterioration.
[3]	Included in loans in the Consolidated Statements of Condition.

Past Due Loans, Allowance For54

Past Due Loans, Allowance For Credit Losses, Impaired Loans, and TDRS (Details) - Allowance for Credit Losses - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance	$ 87,083	$ 74,855
Charge-offs	(6,278)	(5,189)
Recoveries	3,440	1,116
Net charge-offs	(2,838)	(4,073)
Provision for loan losses and other	4,918	7,593
Ending balance	89,163	78,375
Reserve for Unfunded Commitments
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance	1,000	1,225
Charge-offs	0	0
Recoveries	0	0
Net charge-offs	0	0
Provision for loan losses and other	0	0
Ending balance	1,000	1,225
Commercial, industrial, and agricultural
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance	40,709	37,074
Charge-offs	(4,074)	(1,898)
Recoveries	1,666	502
Net charge-offs	(2,408)	(1,396)
Provision for loan losses and other	3,485	2,058
Ending balance	41,786	37,736
Commercial real estate loans
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance	32,040
Ending balance	31,593
Commercial real estate loans | Office, Retail, and Industrial
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance	17,595	13,124
Charge-offs	(127)	(524)
Recoveries	975	103
Net charge-offs	848	(421)
Provision for loan losses and other	(742)	1,717
Ending balance	17,701	14,420
Commercial real estate loans | Multi-family
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance	3,261	2,469
Charge-offs	0	(204)
Recoveries	28	25
Net charge-offs	28	(179)
Provision for loan losses and other	(429)	257
Ending balance	2,860	2,547
Commercial real estate loans | Construction
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance	3,444	1,440
Charge-offs	(5)	(126)
Recoveries	227	15
Net charge-offs	222	(111)
Provision for loan losses and other	444	1,104
Ending balance	4,110	2,433
Commercial real estate loans | Other commercial real estate
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance	7,739	6,109
Charge-offs	(408)	(1,445)
Recoveries	101	151
Net charge-offs	(307)	(1,294)
Provision for loan losses and other	(510)	1,773
Ending balance	6,922	6,588
Consumer loans
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance	13,335
Ending balance	14,784
Consumer loans | Consumer loans
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance	13,335	13,414
Charge-offs	(1,664)	(992)
Recoveries	443	320
Net charge-offs	(1,221)	(672)
Provision for loan losses and other	2,670	684
Ending balance	$ 14,784	$ 13,426

Past Due Loans, Allowance For55

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		Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Individually Evaluated for Impairment		$ 34,498	$ 42,650
Loans Collectively Evaluated for Impairment		9,842,165	8,149,828
Loans		10,054,370	8,254,145
Allowance for Credit Losses Individually Evaluated for Impairment		158	525
Allowance for Credit Losses Collectively Evaluated for Impairment		84,445	81,864
Total Allowance for Credit Losses		89,163	87,083	$ 78,375	$ 74,855
Receivables acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
PCI	[1]	177,707	61,667
Total Allowance for Credit Losses		4,560	4,694
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	1,000
Total Allowance for Credit Losses		1,000	1,000
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		18,167	24,645
Loans Collectively Evaluated for Impairment		3,745,009	3,189,327
Loans		3,793,564	3,217,154
Allowance for Credit Losses Individually Evaluated for Impairment		109	507
Allowance for Credit Losses Collectively Evaluated for Impairment		41,133	39,554
Total Allowance for Credit Losses		41,786	40,709	$ 37,736	$ 37,074
Commercial, industrial, and agricultural | Receivables acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
PCI		30,388	3,182
Total Allowance for Credit Losses		544	648
Commercial real estate loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Individually Evaluated for Impairment		16,331	18,005
Loans Collectively Evaluated for Impairment		4,447,391	3,567,621
Loans		4,586,930	3,627,087
Allowance for Credit Losses Individually Evaluated for Impairment		49	18
Allowance for Credit Losses Collectively Evaluated for Impairment		28,762	29,100
Total Allowance for Credit Losses		31,593	32,040
Commercial real estate loans | Receivables acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
PCI		123,208	41,461
Total Allowance for Credit Losses		2,782	2,922
Commercial real estate loans | Office, retail, and industrial
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Individually Evaluated for Impairment		13,442	16,287
Loans Collectively Evaluated for Impairment		1,956,042	1,553,234
Loans		1,988,979	1,581,967
Allowance for Credit Losses Individually Evaluated for Impairment		31	0
Allowance for Credit Losses Collectively Evaluated for Impairment		16,200	16,148
Total Allowance for Credit Losses		17,701	17,596
Commercial real estate loans | Office, retail, and industrial | Receivables acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
PCI		19,495	12,446
Total Allowance for Credit Losses		1,470	1,448
Commercial real estate loans | Multi-family
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Individually Evaluated for Impairment		396	398
Loans Collectively Evaluated for Impairment		656,769	601,429
Loans		671,710	614,052
Allowance for Credit Losses Individually Evaluated for Impairment		0	0
Allowance for Credit Losses Collectively Evaluated for Impairment		2,784	3,059
Total Allowance for Credit Losses		2,860	3,261
Commercial real estate loans | Multi-family | Receivables acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
PCI		14,545	12,225
Total Allowance for Credit Losses		76	202
Commercial real estate loans | Construction
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Individually Evaluated for Impairment		0	34
Loans Collectively Evaluated for Impairment		548,280	447,058
Loans		568,460	451,540
Allowance for Credit Losses Individually Evaluated for Impairment		0	0
Allowance for Credit Losses Collectively Evaluated for Impairment		3,946	3,280
Total Allowance for Credit Losses		4,110	3,444
Commercial real estate loans | Construction | Receivables acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
PCI		20,180	4,448
Total Allowance for Credit Losses		164	164
Commercial real estate loans | Other commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Individually Evaluated for Impairment		2,493	1,286
Loans Collectively Evaluated for Impairment		1,286,300	965,900
Loans		1,357,781	979,528
Allowance for Credit Losses Individually Evaluated for Impairment		18	18
Allowance for Credit Losses Collectively Evaluated for Impairment		5,832	6,613
Total Allowance for Credit Losses		6,922	7,739
Commercial real estate loans | Other commercial real estate | Receivables acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
PCI		68,988	12,342
Total Allowance for Credit Losses		1,072	1,108
Total corporate loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Individually Evaluated for Impairment		34,498	42,650
Loans Collectively Evaluated for Impairment		8,192,400	6,756,948
Loans		8,380,494	6,844,241
Allowance for Credit Losses Individually Evaluated for Impairment		158	525
Allowance for Credit Losses Collectively Evaluated for Impairment		69,895	68,654
Total Allowance for Credit Losses		73,379	72,748
Total corporate loans | Receivables acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
PCI		153,596	44,643
Total Allowance for Credit Losses		3,326	3,569
Consumer loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Individually Evaluated for Impairment		0	0
Loans Collectively Evaluated for Impairment		1,649,765	1,392,880
Loans		1,673,876	1,409,904
Allowance for Credit Losses Individually Evaluated for Impairment		0	0
Allowance for Credit Losses Collectively Evaluated for Impairment		13,550	12,210
Total Allowance for Credit Losses		14,784	13,335
Consumer loans | Receivables acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
PCI		24,111	17,024
Total Allowance for Credit Losses		$ 1,234	$ 1,125
[1]	Included in loans in the Consolidated Statements of Condition.

Past Due Loans, Allowance For56

Past Due Loans, Allowance For Credit Losses, Impaired Loans, and TDRS (Details) - Impaired Loans Individually Evaluated by Class - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans with No Specific Reserve	$ 33,281	$ 29,314
Recorded Investment in Loans with a Specific Reserve	1,217	13,336
Unpaid Principal Balance	50,300	53,144
Specific Reserve	158	525
Commercial, industrial, and agricultural | Commercial and industrial
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans with No Specific Reserve	16,781	11,579
Recorded Investment in Loans with a Specific Reserve	272	13,066
Unpaid Principal Balance	25,299	29,514
Specific Reserve	109	507
Commercial, industrial, and agricultural | Agricultural
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans with No Specific Reserve	1,114	0
Recorded Investment in Loans with a Specific Reserve	0	0
Unpaid Principal Balance	1,817	0
Specific Reserve	0	0
Commercial real estate loans
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans with No Specific Reserve	16,500	17,735
Recorded Investment in Loans with a Specific Reserve	945	270
Unpaid Principal Balance	25,001	23,630
Specific Reserve	49	18
Commercial real estate loans | Office, retail, and industrial
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans with No Specific Reserve	12,732	16,287
Recorded Investment in Loans with a Specific Reserve	710	0
Unpaid Principal Balance	17,723	21,057
Specific Reserve	31	0
Commercial real estate loans | Multi-family
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans with No Specific Reserve	396	398
Recorded Investment in Loans with a Specific Reserve	0	0
Unpaid Principal Balance	596	398
Specific Reserve	0	0
Commercial real estate loans | Construction
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans with No Specific Reserve	0	34
Recorded Investment in Loans with a Specific Reserve	0	0
Unpaid Principal Balance	315	34
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	2,258	1,016
Recorded Investment in Loans with a Specific Reserve	235	270
Unpaid Principal Balance	4,550	2,141
Specific Reserve	$ 18	$ 18

Past Due Loans, Allowance For57

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
		Mar. 31, 2017	Mar. 31, 2016
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		$ 38,575	$ 15,243
Interest Income Recognized	[1]	483	106
Commercial, industrial, and agricultural | Commercial and industrial
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		20,849	2,794
Interest Income Recognized		214	38	[1]
Commercial, industrial, and agricultural | Agricultural
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		557	0
Interest Income Recognized		0	0	[1]
Commercial real estate loans
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		17,169	12,449
Interest Income Recognized	[1]	269	68
Commercial real estate loans | Office, retail, and industrial
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		14,865	7,923
Interest Income Recognized		93	48	[1]
Commercial real estate loans | Multi-family
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		397	601
Interest Income Recognized		28	1	[1]
Commercial real estate loans | Construction
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		17	106
Interest Income Recognized		136	0	[1]
Commercial real estate loans | Other commercial real estate
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		1,890	3,819
Interest Income Recognized		$ 12	$ 19	[1]
[1]	Recorded using the cash basis of accounting.

Past Due Loans, Allowance For58

Past Due Loans, Allowance For Credit Losses, Impaired Loans, and TDRS (Details) - Credit Quality Indicators by Class - USD ($)		Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Accruing		$ 2,112,000	$ 2,291,000
Special Mention and Substandard Loans
Financing Receivable, Recorded Investment [Line Items]
Accruing		674,000	834,000
Commercial loans
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		8,380,494,000	6,843,914,000
Commercial loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		7,948,402,000	6,493,630,000
Commercial loans | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[1],[2]	198,224,000	159,675,000
Commercial loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[2],[3]	187,347,000	139,724,000
Commercial loans | Non-Accrual
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[4]	46,521,000	50,885,000
Commercial, industrial, and agricultural | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		3,370,780,000	2,827,658,000
Accruing		278,000	281,000
Commercial, industrial, and agricultural | Commercial and industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		3,134,827,000	2,638,833,000
Commercial, industrial, and agricultural | Commercial and industrial | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[1],[2]	113,944,000	92,340,000
Commercial, industrial, and agricultural | Commercial and industrial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[2],[3]	100,495,000	66,547,000
Commercial, industrial, and agricultural | Commercial and industrial | Non-Accrual
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[4]	21,514,000	29,938,000
Commercial, industrial, and agricultural | Agricultural
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		422,784,000	389,496,000
Accruing		0	0
Commercial, industrial, and agricultural | Agricultural | Pass
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		405,354,000	366,382,000
Commercial, industrial, and agricultural | Agricultural | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[1],[2]	9,873,000	17,039,000
Commercial, industrial, and agricultural | Agricultural | Substandard
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[2],[3]	6,274,000	5,894,000
Commercial, industrial, and agricultural | Agricultural | Non-Accrual
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[4]	1,283,000	181,000
Commercial real estate loans
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		4,586,930,000	3,626,760,000
Accruing		845,000	1,009,000
Commercial real estate loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		4,408,221,000	3,488,415,000
Commercial real estate loans | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[1],[2]	74,407,000	50,296,000
Commercial real estate loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[2],[3]	80,578,000	67,283,000
Commercial real estate loans | Non-Accrual
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[4]	23,724,000	20,766,000
Commercial real estate loans | Office, retail, and industrial
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		1,988,979,000	1,581,827,000
Accruing		0	155,000
Commercial real estate loans | Office, retail, and industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		1,887,699,000	1,491,030,000
Commercial real estate loans | Office, retail, and industrial | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[1],[2]	39,545,000	34,007,000
Commercial real estate loans | Office, retail, and industrial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[2],[3]	42,230,000	39,513,000
Commercial real estate loans | Office, retail, and industrial | Non-Accrual
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[4]	19,505,000	17,277,000
Commercial real estate loans | Multi-family
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		671,710,000	614,034,000
Accruing		582,000	586,000
Commercial real estate loans | Multi-family | Pass
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		665,313,000	607,324,000
Commercial real estate loans | Multi-family | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[1],[2]	4,336,000	4,370,000
Commercial real estate loans | Multi-family | Substandard
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[2],[3]	1,898,000	2,029,000
Commercial real estate loans | Multi-family | Non-Accrual
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[4]	163,000	311,000
Commercial real estate loans | Construction
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		568,460,000	451,540,000
Accruing		0	0
Commercial real estate loans | Construction | Pass
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		542,862,000	438,946,000
Commercial real estate loans | Construction | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[1],[2]	8,927,000	111,000
Commercial real estate loans | Construction | Substandard
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[2],[3]	16,473,000	12,197,000
Commercial real estate loans | Construction | Non-Accrual
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[4]	198,000	286,000
Commercial real estate loans | Other commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		1,357,781,000	979,359,000
Accruing		263,000	268,000
Commercial real estate loans | Other commercial real estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class		1,312,347,000	951,115,000
Commercial real estate loans | Other commercial real estate | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[1],[2]	21,599,000	11,808,000
Commercial real estate loans | Other commercial real estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[2],[3]	19,977,000	13,544,000
Commercial real estate loans | Other commercial real estate | Non-Accrual
Financing Receivable, Recorded Investment [Line Items]
Credit Quality Indicators by Class	[4]	$ 3,858,000	$ 2,892,000
[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 $674,000 as of March 31, 2017 and $834,000 as of December 31, 2016.
[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 For59

Past Due Loans, Allowance For Credit Losses, Impaired Loans, and TDRS (Details) - Credit Quality Indicators by Class (Continued) - Consumer loans - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
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	$ 1,673,876	$ 1,386,957
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	1,666,103	1,379,032
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	7,773	7,925
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	880,667	732,604
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	875,868	727,618
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	4,799	4,986
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	540,148	416,354
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	537,174	413,415
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	2,974	2,939
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	253,061	237,999
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	253,061	237,999
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	$ 0

Past Due Loans, Allowance For60

Past Due Loans, Allowance For Credit Losses, Impaired Loans, and TDRS (Details) - TDRs By Class - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing		$ 2,112	$ 2,291
Non-accrual	[1]	3,112	6,297
Total		5,224	8,588	$ 4,970
Commercial, industrial, and agricultural | Commercial and industrial
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing		278	281
Non-accrual	[1]	922	150
Total		1,200	431
Commercial, industrial, and agricultural | Agricultural
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing		0	0
Non-accrual	[1]	0	0
Total		0	0
Commercial real estate loans
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing		845	1,009
Non-accrual	[1]	1,027	4,949
Total		1,872	5,958
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		0	155
Non-accrual	[1]	864	4,733
Total		864	4,888
Commercial real estate loans | Multi-family
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing		582	586
Non-accrual	[1]	163	168
Total		745	754
Commercial real estate loans | Construction
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing		0	0
Non-accrual	[1]	0	0
Total		0	0
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		263	268
Non-accrual	[1]	0	48
Total		263	316
Total corporate loans
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing		1,123	1,290
Non-accrual	[1]	1,949	5,099
Total		3,072	6,389
Consumer loans
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing		989	1,001
Non-accrual	[1]	1,163	1,198
Total		2,152	2,199
Consumer loans | Home equity
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing		172	177
Non-accrual	[1]	795	820
Total		967	997
Consumer loans | 1-4 family mortgages
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing		817	824
Non-accrual	[1]	368	378
Total		1,185	1,202
Consumer loans | Installment
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing		0	0
Non-accrual	[1]	0	0
Total		$ 0	$ 0
[1]	These TDRs are included in non-accrual loans in the preceding tables.

Past Due Loans, Allowance For61

Past Due Loans, Allowance For Credit Losses, Impaired Loans, and TDRS (Details) - Narrative - USD ($)	Mar. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Valuation allowance on TDR loans	$ 32,000	$ 0
Commitments to lend additional funds on TDRs loans	$ 0	$ 0

Past Due Loans, Allowance For62

Past Due Loans, Allowance For Credit Losses, Impaired Loans, and TDRS (Details) - TDR Rollforward - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Troubled Debt Restructuring Activity Rollforward [Rollforward]
Beginning balance	$ 8,588
Ending balance	5,224	$ 4,970
Accruing
Troubled Debt Restructuring Activity Rollforward [Rollforward]
Beginning balance	2,291	2,743
Additions	922	0
Net payments received	(24)	(41)
Net transfers to non-accrual	(1,077)	0
Ending balance	2,112	2,702
Non-accrual
Troubled Debt Restructuring Activity Rollforward [Rollforward]
Beginning balance	6,297	2,324
Net payments received	(4,150)	(56)
Charge-offs	(112)	0
Net transfers from accruing	1,077	0
Ending balance	$ 3,112	$ 2,268

Premises, Furniture, and Equi63

Premises, Furniture, and Equipment (Details) - Premises, Furniture, and Equipment - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Abstract]
Land	$ 29,942	$ 18,304
Premises	138,748	94,369
Furniture and equipment	133,618	105,859
Total cost	302,308	218,532
Accumulated depreciation	(178,801)	(140,030)
Net book value of premises, furniture, and equipment	123,507	78,502
Assets held-for-sale	17,146	4,075
Total premises, furniture, and equipment	$ 140,653	$ 82,577

Premises, Furniture, and Equi64

Premises, Furniture, and Equipment (Details) - Narrative $ in Millions	Sep. 27, 2016	Mar. 31, 2017USD ($)	Mar. 31, 2016USD ($)	Dec. 31, 2016USD ($)renewal_optionretail_branch
Property, Plant and Equipment [Line Items]
Aggregate cash purchase price				$ 150.3
Number of branches sold | retail_branch				55
Net book value of properties				$ 58.8
Initial term of lease for sale-leaseback transaction	14 years
Number of lease renewal options | renewal_option				5
Pre-tax gain on sale-leaseback transaction				$ 88
Deferred gain, net		$ 79.5		$ 82.5
Depreciation of premises, furniture, and equipment		$ 3.5	$ 3.2
Five Year Renewal Period
Property, Plant and Equipment [Line Items]
Renewal lease periods for sale-leaseback transactions	5 years

Premises, Furniture, and Equi65

Premises, Furniture, and Equipment (Details) - Operating Leases $ in Thousands	Mar. 31, 2017USD ($)
Property, Plant and Equipment [Abstract]
One year or less	$ 18,809
After one year to two years	16,591
After two years to three years	16,800
After three years to four years	16,276
After four years to five years	16,190
After five years	124,340
Total minimum lease payments	$ 209,006

Premises, Furniture, and Equi66

Premises, Furniture, and Equipment (Details) - Accretion of Operating Leases $ in Thousands	Mar. 31, 2017USD ($)
Property, Plant and Equipment [Abstract]
One year or less	$ 1,180
After one year to two years	829
After two years to three years	658
After three years to four years	648
After four years to five years	648
After five years	3,835
Total accretion	$ 7,798

Premises, Furniture, and Equi67

Premises, Furniture, and Equipment (Details) - Rental Expense - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Property, Plant and Equipment [Abstract]
Lease expense charged to operations		$ 4,559	$ 1,727
Accretion of operating lease intangible	[1]	(295)	(286)
Accretion of deferred gain on sale-leaseback transaction	[1]	(1,473)	0
Rental income from premises leased to others	[1]	(181)	(158)
Net operating lease expense		$ 2,610	$ 1,283
[1]	Included as reductions to net occupancy and equipment expense in the Condensed Consolidated Statements of Income.

Goodwill and Other Intangible68

Goodwill and Other Intangible Assets (Details) - Changes in Carrying Amount of Goodwill - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Goodwill [Roll Forward]
Beginning balance	$ 340,879	$ 319,007
Acquisitions	350,693	20,761
Ending balance	$ 691,572	$ 339,768

Goodwill and Other Intangible69

Goodwill and Other Intangible Assets (Details) - Other Intangible Assets - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Finite-lived Intangible Assets [Roll Forward]
Balance at the beginning of the year, gross	$ 58,959	$ 48,550
Balance at the beginning of the year, accumulated amortization	32,962	28,280
Balance at the beginning of the year, net	25,997	20,270
Additions	39,017	10,925
Amortization expense	1,965	985
Balance at the end of the year, gross	97,976	59,475
Balance at the end of the year, accumulated amortization	34,927	29,265
Balance at the end of the year, net	$ 63,049	$ 30,210

Goodwill and Other Intangible70

Goodwill and Other Intangible Assets (Details) - Amortization of Other Intangible Assets - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
2,018	$ 7,702
2,019	7,108
2,020	7,064
2,021	7,009
2,022	6,922
2023 and thereafter	27,244
Total	$ 63,049	$ 25,997	$ 30,210	$ 20,270

Deposits (Details) - Summary of

Deposits (Details) - Summary of Deposits - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Deposits [Abstract]
Noninterest-bearing deposits	$ 3,492,987	$ 2,766,748
Savings deposits	2,073,518	1,615,833
NOW accounts	1,876,215	1,675,421
Money market deposits	1,972,566	1,577,316
Time deposits less than $100,000	918,092	755,558
Time deposits greater than $100,000	623,163	437,727
Total deposits	$ 10,956,541	$ 8,828,603

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
		Mar. 31, 2017	Mar. 31, 2016
Earnings Per Share [Abstract]
Net income		$ 22,855	$ 17,962
Net income applicable to non-vested restricted shares		(234)	(212)
Net income applicable to common shares		$ 22,621	$ 17,750
Weighted-average common shares outstanding (basic) (in Shares)		100,411	77,980
Dilutive effect of common stock equivalents (in Shares)		21	12
Weighted-average diluted common shares outstanding (in Shares)		100,432	77,992
Basic EPS (in Dollars per share)		$ 0.23	$ 0.23
Diluted EPS (in Dollars per share)		$ 0.23	$ 0.23
Anti-dilutive shares not included in the computation of diluted EPS (in Shares)	[1]	343	608
[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 He73

Derivative Instruments and Hedging Activities (Details) - Fair Value Hedges - Fair Value Hedging - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
		Mar. 31, 2017	Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross notional amount outstanding		$ 5,833	$ 5,958
Derivative liability fair value		$ (226)	$ (282)
Weighted-average interest rate received		2.83%	2.63%
Weighted-average interest rate paid		5.96%	5.96%
Weighted-average maturity (in years)		1 year 7 months 7 days	1 year 10 months 2 days
Fair value of derivative	[1]	$ 240	$ 296
[1]	This amount represents the fair value if credit risk related contingent features were triggered.

Derivative Instruments and He74

Derivative Instruments and Hedging Activities (Details) - Narrative - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Jun. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Amount of variable rate loans hedged using interest rate swaps	$ 980,000
Amount hedged of borrowed funds using forward starting interest rate swaps	980,000			$ 415,000
Interest rate cash flow hedge loss (gain) to be reclassified during the next 12 months, net	7,600
Capital market products income	$ 1,376	$ 3,215
Portion of fair value of outstanding interest rate swaps covered by collateral agreements (percent)	100.00%		100.00%

Derivative Instruments and He75

Derivative Instruments and Hedging Activities (Details) - Cash Flow Hedges - Cash Flow Hedging - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross notional amount outstanding	$ 1,960,000	$ 1,470,000
Derivative asset fair value	4,078	5,402
Derivative liability fair value	$ (8,286)	$ (7,390)
Weighted-average interest rate received	1.42%	1.37%
Weighted-average interest rate paid	1.23%	1.11%
Weighted-average maturity (in years)	3 years	2 years 9 months 28 days

Derivative Instruments and He76

Derivative Instruments and Hedging Activities (Details) - Other Derivative Instruments - Other Derivative Instruments - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Gross notional amount outstanding		$ 2,100,325	$ 1,656,612
Derivative asset fair value		15,722	13,478
Derivative liability fair value		(15,722)	(13,478)
Fair value of derivative	[1]	$ 16,340	$ 13,753
[1]	This amount represents the fair value if credit risk related contingent features were triggered.

Derivative Instruments and He77

Derivative Instruments and Hedging Activities (Details) - Offsetting Derivatives - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Assets
Gross amounts recognized		$ 19,800	$ 18,880
Less: amounts offset in the Consolidated Statements of Financial Condition		0	0
Net amount presented in the Consolidated Statements of Financial Condition	[1]	19,800	18,880
Offsetting derivative positions		(11,293)	(10,889)
Cash collateral pledged		0	0
Derivative Asset, Net credit exposure		8,507	7,991
Liabilities
Gross amounts recognized		24,234	21,150
Less: amounts offset in the Consolidated Statements of Financial Condition		0	0
Net amount presented in the Consolidated Statements of Financial Condition	[1]	24,234	21,150
Offsetting derivative positions		(11,293)	(10,889)
Cash collateral pledged		(12,941)	(10,261)
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 78

Commitments, Guarantees, and Contingent Liabilities (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Other Commitments [Line Items]
Letters of credit		$ 146,632	$ 100,430
Recourse on assets sold:
Unpaid principal balance of loans sold		185,101	187,158
Carrying value of recourse obligation	[1]	150	142
Commitments to extend credit
Other Commitments [Line Items]
Commercial, industrial, and agricultural		1,737,410	1,522,152
Commercial real estate		427,425	397,423
Home equity		486,880	426,384
Other commitments	[2]	250,123	214,943
Total commitments to extend credit		$ 2,901,838	$ 2,560,902
[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		Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Trading securities:
Total trading securities		$ 19,130	$ 17,920
Securities Available-for-Sale
Securities available-for-sale, at fair value		1,937,124	1,919,450
Mortgage servicing rights (MSRs)		6,245	6,120	$ 5,022	$ 1,853
U.S. treasury securities
Securities Available-for-Sale
Securities available-for-sale, at fair value		48,516	48,541
U.S. agency securities
Securities Available-for-Sale
Securities available-for-sale, at fair value		181,030	183,637
MBSs
Securities Available-for-Sale
Securities available-for-sale, at fair value		352,966	332,655
Municipal securities
Securities Available-for-Sale
Securities available-for-sale, at fair value		262,710	270,846
CDOs
Securities Available-for-Sale
Securities available-for-sale, at fair value		33,436	33,260
Equity securities
Securities Available-for-Sale
Securities available-for-sale, at fair value		7,102	3,065
Recurring | Level 1
Trading securities:
Money market funds		1,768	1,645
Mutual funds		17,362	16,275
Total trading securities		19,130	17,920
Securities Available-for-Sale
Securities available-for-sale, at fair value		48,516	48,541
Mortgage servicing rights (MSRs)	[1]	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		48,516	48,541
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		1,855,172	1,837,649
Mortgage servicing rights (MSRs)	[1]	0
Derivative assets	[1]	19,800	18,880
Liabilities:
Derivative liabilities	[2]	24,234	21,150
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		181,030	183,637
Recurring | Level 2 | CMOs
Securities Available-for-Sale
Securities available-for-sale, at fair value		1,051,364	1,047,446
Recurring | Level 2 | MBSs
Securities Available-for-Sale
Securities available-for-sale, at fair value		352,966	332,655
Recurring | Level 2 | Municipal securities
Securities Available-for-Sale
Securities available-for-sale, at fair value		262,710	270,846
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		7,102	3,065
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		33,436	33,260
Mortgage servicing rights (MSRs)	[1]	6,245	6,120
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		33,436	33,260
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	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Minimum
Fair Value (Details) - Assets Measured At Fair Value On A Non-Recurring Basis [Line Items]
Probability of prepayment	0.00%	0.00%
Probability of default	16.60%	16.70%
Loss given default	93.30%	93.30%
Probability of deferral cure	0.00%	7.60%
Maximum
Fair Value (Details) - Assets Measured At Fair Value On A Non-Recurring Basis [Line Items]
Probability of prepayment	10.90%	10.90%
Probability of default	44.10%	46.80%
Loss given default	99.10%	98.90%
Probability of deferral cure	100.00%	100.00%

Fair Value (Details) - Carrying

Fair Value (Details) - Carrying Value of Level 3 Securities Available-for-Sale - CDOs - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Rollforward of the Carrying Value of CDOs [Roll Forward]
Beginning balance		$ 33,260	$ 31,529
Change in other comprehensive income	[1]	129	(786)
Other		47	14
Ending balance		$ 33,436	$ 30,757
[1]	Included in unrealized holding gains in the Consolidated Statements of Comprehensive Income.

Fair Value (Details) - Narrativ

Fair Value (Details) - Narrative - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Total amount of loans being serviced for the benefit of others at the end of the period	$ 632.7	$ 640.5
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	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
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	7.70%	7.70%
Maturity (months)	10 months	12 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	25.50%	22.80%
Maturity (months)	102 months	103 months
Discount rate	13.00%	13.00%

Fair Value (Details) - Carryi84

Fair Value (Details) - Carrying Value of Mortgage Servicing Rights - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Servicing Asset at Fair Value, Amount [Roll Forward]
Beginning balance		$ 6,120	$ 1,853
Additions from acquisition		0	3,092
New MSRs		156	185
Total gains (losses) included in earnings:
Changes in valuation inputs and assumptions	[1]	172	(40)
Other changes in fair value	[1],[2]	(203)	(68)
Ending balance		6,245	5,022
Contractual servicing fees earned	[1]	$ 395	$ 183
[1]	Included in mortgage banking income in the Condensed Consolidated Statements of Income and related to assets held as of March 31, 2017 and 2016.
[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		Mar. 31, 2017	Dec. 31, 2016
Fair Value (Details) - Assets Measured At Fair Value On A Non-Recurring Basis [Line Items]
OREO		$ 29,140	$ 26,083
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]	11,528	22,019
OREO	[2]	780	8,624
Loans held-for-sale	[3]	9,144	10,484
Assets held-for-sale	[4]	$ 17,146	$ 4,075
[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	Mar. 31, 2017	Dec. 31, 2016
Assets:
Cash and due from banks	$ 174,268	$ 155,055
Interest-bearing deposits in other banks	74,892	107,093
Securities held-to-maturity, at amortized cost	17,742	22,291
FHLB and FRB stock	46,306	59,131
Loans	9,966,207	8,168,062
Investment in BOLI	276,960	219,746
Liabilities:
Deposits	10,956,541	8,828,603
Borrowed funds	547,923	879,008
Senior and subordinated debt	194,745	194,603
Level 1
Assets:
Cash and due from banks	174,268	155,055
Level 2
Assets:
Interest-bearing deposits in other banks	74,892	107,093
Securities held-to-maturity, at amortized cost	15,118	18,212
FHLB and FRB stock	46,306	59,131
Liabilities:
Deposits	10,945,331	8,820,572
Borrowed funds	547,923	879,008
Senior and subordinated debt	202,522	197,888
Accrued interest payable	2,564	3,416
Level 3
Assets:
Loans	9,712,763	7,973,845
Investment in BOLI	276,960	219,746
Accrued interest receivable	39,868	34,384
Other interest-earning assets	635	834
Carrying Amount | Level 1
Assets:
Cash and due from banks	174,268	155,055
Carrying Amount | Level 2
Assets:
Interest-bearing deposits in other banks	74,892	107,093
Securities held-to-maturity, at amortized cost	17,742	22,291
FHLB and FRB stock	46,306	59,131
Liabilities:
Deposits	10,956,541	8,828,603
Borrowed funds	547,923	879,008
Senior and subordinated debt	194,745	194,603
Accrued interest payable	2,564	3,416
Carrying Amount | Level 3
Assets:
Loans	9,970,427	8,172,584
Investment in BOLI	276,960	219,746
Accrued interest receivable	39,868	34,384
Other interest-earning assets	$ 635	$ 834