First Midwest Bancorp (ONBPP) 10-Q 6 Aug 20 2020 Q2 Quarterly report Financial data

Cover

Cover - shares	6 Months Ended
	Jun. 30, 2020	Aug. 03, 2020
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	001-39320
Entity Registrant Name	First Midwest Bancorp, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	36-3161078
Entity Address, Address Line One	8750 West Bryn Mawr Avenue
Entity Address, Address Line Two	Suite 1300
Entity Address, City or Town	Chicago
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60631-3655
City Area Code	708
Local Phone Number	831-7483
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		114,305,540
Amendment Flag	false
Entity Central Index Key	0000702325
Document Period End Date	Jun. 30, 2020
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Common Stock
Document Information [Line Items]
Title of 12(b) Security	Common stock, $0.01 par value
Trading Symbol	FMBI
Security Exchange Name	NASDAQ
Series A Preferred Stock
Document Information [Line Items]
Title of 12(b) Security	Depositary shares, each representing a 1/40th interest in a share of 7.000% Fixed Rate Non-Cumulative Perpetual Preferred Stock, Series A
Trading Symbol	FMBIP
Security Exchange Name	NASDAQ
Series C Preferred Stock
Document Information [Line Items]
Title of 12(b) Security	Depositary shares, each representing a 1/40th interest in a share of 7.000% Fixed Rate Non-Cumulative Perpetual Preferred Stock, Series C
Trading Symbol	FMBIO
Security Exchange Name	NASDAQ

Consolidated Statements of Fina

Consolidated Statements of Financial Condition - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Assets
Cash and due from banks	$ 304,445	$ 214,894
Interest-bearing deposits in other banks	637,856	84,327
Equity securities, at fair value	43,954	42,136
Securities available-for-sale, at fair value	3,435,862	2,873,386
Securities held-to-maturity, at amortized cost, net	19,628	21,997
Federal Home Loan Bank ("FHLB") and Federal Reserve Bank ("FRB") stock, at cost	148,512	115,409
Loans	14,933,658	12,840,330
Allowance for loan losses	(240,052)	(108,022)
Net loans	14,693,606	12,732,308
Other real estate owned ("OREO")	9,947	8,750
Premises, furniture, and equipment, net	143,001	147,996
Investment in bank-owned life insurance ("BOLI")	299,649	296,351
Goodwill and other intangible assets	940,182	875,262
Accrued interest receivable and other assets	568,239	437,581
Total assets	21,244,881	17,850,397
Liabilities
Noninterest-bearing deposits	5,602,016	3,802,422
Interest-bearing deposits	10,055,640	9,448,856
Total deposits	15,657,656	13,251,278
Short-term Debt	2,305,195	1,658,758
Senior and subordinated debt	234,358	233,948
Accrued interest payable and other liabilities	391,461	335,620
Total liabilities	18,588,670	15,479,604
Stockholders' Equity
Preferred stock	230,500	0
Common stock	1,253	1,204
Additional paid-in capital	1,268,647	1,211,274
Retained earnings	1,359,407	1,380,612
Accumulated other comprehensive income (loss), net of tax	28,727	(1,954)
Treasury stock, at cost	(232,323)	(220,343)
Total stockholders' equity	2,656,211	2,370,793
Total liabilities and stockholders' equity	$ 21,244,881	$ 17,850,397
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 (in shares)	1,000,000	1,000,000
Common stock, shares authorized (in shares)	250,000,000	250,000,000
Preferred stock, shares issued (in shares)	231,000
Common stock, shares issued (in shares)	125,355,000	120,415,000
Preferred stock, shares outstanding (in shares)	231,000
Common stock, shares outstanding (in shares)	114,276,000	109,972,000
Treasury stock, shares (in shares)	11,079,000	10,443,000

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income - USD ($) shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Interest Income
Loans	$ 140,819,000	$ 157,680,000	$ 288,605,000	$ 302,484,000
Investment securities	20,386,000	18,005,000	40,624,000	34,011,000
Other short-term investments	839,000	1,997,000	3,042,000	3,677,000
Total interest income	162,044,000	177,682,000	332,271,000	340,172,000
Interest Expense
Deposits	10,077,000	19,316,000	27,194,000	35,918,000
Borrowed funds	3,156,000	4,459,000	8,997,000	8,010,000
Senior and subordinated debt	3,577,000	3,595,000	7,271,000	6,908,000
Total interest expense	16,810,000	27,370,000	43,462,000	50,836,000
Net interest income	145,234,000	150,312,000	288,809,000	289,336,000
Provision for loan losses	32,649,000	11,491,000	72,181,000	21,935,000
Net interest income after provision for loan losses	112,585,000	138,821,000	216,628,000	267,401,000
Noninterest Income
Wealth management fees	11,942,000	12,190,000	24,303,000	23,790,000
Service charges on deposit accounts	9,125,000	12,196,000	20,906,000	23,736,000
Mortgage banking income	3,477,000	1,901,000	5,265,000	2,905,000
Card-based fees	3,180,000	4,549,000	7,148,000	8,927,000
Other service charges, commissions, and fees	2,078,000	2,783,000	4,760,000	5,394,000
Capital market products income	694,000	2,154,000	5,416,000	3,433,000
Net securities losses	0	0	(1,005,000)	0
Other income	2,495,000	2,753,000	5,560,000	5,247,000
Total noninterest income	32,991,000	38,526,000	72,353,000	73,432,000
Noninterest Expense
Salaries and employee benefits	63,672,000	58,692,000	126,531,000	116,065,000
Net occupancy and equipment expense	15,116,000	12,294,000	29,343,000	26,091,000
Technology and related costs	9,853,000	7,128,000	18,401,000	13,398,000
Professional services	8,880,000	9,624,000	19,270,000	16,711,000
Net OREO expense	126,000	294,000	546,000	975,000
Other expenses	17,434,000	16,154,000	32,849,000	29,107,000
Acquisition and integration related expenses	5,249,000	9,514,000	10,721,000	13,205,000
Delivering Excellence implementation costs	0	442,000	0	700,000
Total noninterest expense	120,330,000	114,142,000	237,661,000	216,252,000
Income before income tax expense	25,246,000	63,205,000	51,320,000	124,581,000
Income tax expense	6,182,000	16,191,000	12,650,000	31,509,000
Net income	19,064,000	47,014,000	38,670,000	93,072,000
Preferred dividends	(1,037,000)	0	(1,037,000)	0
Net income applicable to unvested restricted shares	(187,000)	(389,000)	(379,000)	(792,000)
Net income applicable to common shares	$ 17,840,000	$ 46,625,000	$ 37,254,000	$ 92,280,000
Per Common Share Data
Basic earnings per common share (in dollars per share)	$ 0.16	$ 0.43	$ 0.33	$ 0.86
Diluted earnings per common share (in dollars per share)	0.16	0.43	0.33	0.86
Dividends declared per common share (in dollars per share)	$ 0.14	$ 0.14	$ 0.28	$ 0.26
Weighted-average common shares outstanding (in Shares)	113,145	108,467	111,533	107,126
Weighted-average diluted common shares outstanding (in Shares)	113,336	108,467	111,872	107,126

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 19,064	$ 47,014	$ 38,670	$ 93,072
Unrealized holding (losses) gains:
Before tax	(1,719)	38,237	60,835	64,989
Tax effect	381	(10,649)	(16,916)	(18,100)
Net of tax	(1,338)	27,588	43,919	46,889
Reclassification of net losses included in net income:
Before tax	0	0	(1,005)	0
Tax effect	0	0	282	0
Net of tax	0	0	(723)	0
Net unrealized holding (losses) gains	(1,338)	27,588	43,196	46,889
Derivative Instruments
Before tax	(7,300)	2,441	(17,340)	3,899
Tax effect	2,042	(680)	4,825	(1,086)
Net of tax	(5,258)	1,761	(12,515)	2,813
Total other comprehensive (loss) income	(6,596)	29,349	30,681	49,702
Total comprehensive income	$ 12,468	$ 76,363	$ 69,351	$ 142,774

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income - AOCI - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ 2,370,793	$ 2,054,998
Ending balance	2,656,211	2,300,573
Accumulated Unrealized (Loss) Gain on Securities Available- for-Sale
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	15,808	(28,792)
Other comprehensive income (loss)	43,196	46,889
Ending balance	59,004	18,097
Accumulated Unrealized (Loss) Gain on Derivative Instruments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	819	(2,550)
Other comprehensive income (loss)	(12,515)	2,813
Ending balance	(11,696)	263
Unrecognized Net Pension Costs
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(18,581)	(21,170)
Other comprehensive income (loss)	0	0
Ending balance	(18,581)	(21,170)
Total Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(1,954)	(52,512)
Other comprehensive income (loss)	30,681	49,702
Ending balance	$ 28,727	$ (2,810)

Consolidated Statements of Chan

Consolidated Statements of Changes In Stockholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period Of Adoption, Adjustment		Common Stock	Preferred Stock	Additional Paid-in Capital	Retained Earnings	Retained EarningsCumulative Effect, Period Of Adoption, Adjustment		Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Beginning balance (in shares) at Dec. 31, 2018				106,375,000
Beginning balance at Dec. 31, 2018	$ 2,054,998	$ 47,257	[1]	$ 1,157	$ 0	$ 1,114,580	$ 1,192,767	$ 47,257	[1]	$ (52,512)	$ (200,994)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	93,072						93,072
Other comprehensive income (loss)	49,702									49,702
Common dividends declared	(28,340)						(28,340)
Repurchases of common stock (in shares)				(1,042,000)
Repurchases of common stock	(21,190)										(21,190)
Acquisitions, net of issuance costs (in shares)				4,879,000
Acquisition, net of issuance costs	101,496			$ 47		97,351					4,098
Common stock issued (in shares)				30,000
Common stock issued	605					(69)					674
Restricted stock activity (in shares)				353,000
Restricted stock activity	(3,770)					(13,320)					9,550
Treasury stock issued to benefit plans (in shares)				(6,000)
Treasury stock issued to benefit plans	(120)					(9)					(111)
Share-based compensation expense	6,863					6,863
Ending balance (in shares) at Jun. 30, 2019				110,589,000
Ending balance at Jun. 30, 2019	2,300,573			$ 1,204	0	1,205,396	1,304,756			(2,810)	(207,973)
Beginning balance (in shares) at Mar. 31, 2019				106,900,000
Beginning balance at Mar. 31, 2019	2,159,471			$ 1,157	0	1,103,991	1,273,245			(32,159)	(186,763)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	47,014						47,014
Other comprehensive income (loss)	29,349									29,349
Common dividends declared	(15,503)						(15,503)
Repurchases of common stock (in shares)				(1,042,000)
Repurchases of common stock	(21,190)										(21,190)
Acquisitions, net of issuance costs (in shares)				4,729,000
Acquisition, net of issuance costs	98,212			$ 47		98,165					0
Common stock issued (in shares)				3,000
Common stock issued	68					68					0
Restricted stock activity (in shares)				1,000
Restricted stock activity	5					(7)					12
Treasury stock issued to benefit plans (in shares)				(2,000)
Treasury stock issued to benefit plans	(37)					(5)					(32)
Share-based compensation expense	3,184					3,184
Ending balance (in shares) at Jun. 30, 2019				110,589,000
Ending balance at Jun. 30, 2019	$ 2,300,573			$ 1,204	0	1,205,396	1,304,756			(2,810)	(207,973)
Beginning balance (in shares) at Dec. 31, 2019	109,972,000			109,972,000
Beginning balance at Dec. 31, 2019	$ 2,370,793	$ (26,821)	[2]	$ 1,204	0	1,211,274	1,380,612	$ (26,821)	[2]	(1,954)	(220,343)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	38,670						38,670
Other comprehensive income (loss)	30,681									30,681
Preferred dividends	(1,037)						(1,037)
Common dividends declared	(32,017)						(32,017)
Preferred stock issued	221,312				230,500	(9,188)
Repurchases of common stock (in shares)				(1,171,000)
Repurchases of common stock	(22,557)										(22,557)
Acquisitions, net of issuance costs (in shares)				4,930,000
Acquisition, net of issuance costs	71,883			$ 49		71,834
Common stock issued (in shares)				43,000
Common stock issued	930			$ 0		251					679
Restricted stock activity (in shares)				513,000
Restricted stock activity	(3,135)					(13,180)					10,045
Treasury stock issued to benefit plans (in shares)				(11,000)
Treasury stock issued to benefit plans	(168)					(21)					(147)
Share-based compensation expense	$ 7,677					7,677
Ending balance (in shares) at Jun. 30, 2020	114,276,000			114,276,000
Ending balance at Jun. 30, 2020	$ 2,656,211			$ 1,253	230,500	1,268,647	1,359,407			28,727	(232,323)
Beginning balance (in shares) at Mar. 31, 2020				114,213,000
Beginning balance at Mar. 31, 2020	2,435,707			$ 1,253	0	1,274,935	1,357,395			35,323	(233,199)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	19,064						19,064
Other comprehensive income (loss)	(6,596)									(6,596)
Preferred dividends	(1,037)						(1,037)
Common dividends declared	(16,015)						(16,015)
Preferred stock issued	221,312				230,500	(9,188)
Common stock issued (in shares)				6,000
Common stock issued	79					79					0
Restricted stock activity (in shares)				64,000
Restricted stock activity	31					(912)					943
Treasury stock issued to benefit plans (in shares)				(7,000)
Treasury stock issued to benefit plans	(89)					(22)					(67)
Share-based compensation expense	$ 3,755					3,755
Ending balance (in shares) at Jun. 30, 2020	114,276,000			114,276,000
Ending balance at Jun. 30, 2020	$ 2,656,211			$ 1,253	$ 230,500	$ 1,268,647	$ 1,359,407			$ 28,727	$ (232,323)
[1]	As a result of accounting guidance adopted in the first quarter of 2019, the remaining deferred gain on a sale-leaseback transaction was recognized as a cumulative-effect adjustment to retained earnings as of January 1, 2019.
[2]	As a result of accounting guidance adopted in the first quarter of 2020, a portion of the increase in allowance for credit losses, net of tax, was recognized as a cumulative-effect adjustment to retained earnings as of January 1, 2020. For further discussion of this guidance, see Note 2, "Recent Accounting Pronouncements and Other Guidance."

Consolidated Statements of Ch_2

Consolidated Statements of Changes In Stockholders' Equity (Parentheticals) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Stockholders' Equity [Abstract]
Dividends declared per common share (in dollars per share)	$ 0.14	$ 0.14	$ 0.28	$ 0.26

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Operating Activities
Net income	$ 38,670,000	$ 93,072,000
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	72,181,000	21,935,000
Depreciation of premises, furniture, and equipment	8,397,000	8,093,000
Net amortization of premium on securities	10,914,000	6,609,000
Net securities losses	1,005,000	0
Gains on sales of 1-4 family mortgages and corporate loans held-for-sale	(7,230,000)	(3,391,000)
Net losses (gains) on sales and valuation adjustments of OREO	128,000	(1,169,000)
Amortization of the FDIC indemnification asset	892,000	604,000
Net losses on sales and valuation adjustments of premises, furniture, and equipment	213,000	1,252,000
BOLI income	(3,798,000)	(3,645,000)
Share-based compensation expense	7,677,000	6,863,000
Tax benefit related to share-based compensation	148,000	160,000
Amortization of other intangible assets	5,590,000	4,987,000
Originations of mortgage loans held-for-sale	(297,019,000)	(164,398,000)
Proceeds from sales of mortgage loans held-for-sale	292,410,000	154,191,000
Net increase in equity securities	(1,818,000)	(2,918,000)
Net (increase) decrease in accrued interest receivable and other assets	(124,850,000)	19,027,000
Net increase (decrease) in accrued interest payables and other liabilities	12,871,000	(36,151,000)
Net cash provided by operating activities	16,381,000	105,121,000
Investing Activities
Proceeds from maturities, repayments, and calls of securities available-for-sale	497,430,000	167,502,000
Proceeds from sales of securities available-for-sale	39,095,000	93,332,000
Purchases of securities available-for-sale	(914,234,000)	(460,066,000)
Proceeds from maturities, repayments, and calls of securities held-to-maturity	2,467,000	3,162,000
Purchases of securities held-to-maturity	(18,000)	(2,837,000)
Net purchases of FHLB stock	(33,103,000)	(27,683,000)
Net increase in loans	(1,360,147,000)	(394,713,000)
Premiums paid on BOLI, net of proceeds from claims	2,997,000	3,260,000
Proceeds from sales of OREO	230,000	5,236,000
Proceeds from sales of premises, furniture, and equipment	0	2,291,000
Purchases of premises, furniture, and equipment	(4,647,000)	(10,360,000)
Net cash received from (paid for) acquisition	142,282,000	(13,532,000)
Net cash used in investing activities	(1,627,648,000)	(634,408,000)
Financing Activities
Net increase in deposit accounts	1,456,302,000	117,722,000
Net increase in borrowed funds	634,905,000	499,553,000
Net proceeds from the issuance of preferred stock	221,312,000	0
Repurchases of common stock	(22,557,000)	(21,190,000)
Cash dividends paid	(32,480,000)	(25,636,000)
Restricted stock activity	(3,135,000)	(3,770,000)
Net cash provided by financing activities	2,254,347,000	566,679,000
Net increase in cash and cash equivalents	643,080,000	37,392,000
Cash and cash equivalents at beginning of period	299,221,000	289,258,000
Cash and cash equivalents at end of period	942,301,000	326,650,000
Supplemental Disclosures of Cash Flow Information:
Income taxes paid	587,000	16,948,000
Interest paid to depositors and creditors	46,331,000	47,750,000
Dividends declared, but unpaid	15,857,000	15,377,000
Stock issued for acquisitions, net of issuance costs	71,883,000	101,496,000
Non-cash transfers of loans to OREO	121,000	322,000
Non-cash transfers of loans to other assets	0	13,175,000
Non-cash transfers of loans held-for-investment to loans held-for-sale	2,193,000	4,762,000
Non-cash recognition of right-of-use asset/liability	$ 0	$ 143,561,000

Summary of Significant Accounti

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2020
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation – The accompanying unaudited condensed consolidated interim financial statements ("consolidated financial statements") of First Midwest Bancorp, Inc. (the "Company"), a Delaware corporation, were prepared in accordance with the rules and regulations of the Securities and Exchange Commission ("SEC") for quarterly reports on Form 10-Q and reflect all adjustments that management deems necessary for the fair presentation of the financial position and results of operations for the periods presented. The results of operations for the quarter and six months ended June 30, 2020 are not necessarily indicative of the results that may be expected for the year ending December 31, 2020. 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 2019 Annual Report on Form 10-K ("2019 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, lease obligations, 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 2019 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. Allowance for Securities Held-to-Maturity – The Company maintains an allowance for securities held-to-maturity for the risk of loss inherent in these financial assets, which reflects the difference between the carrying value and the discounted expected future cash flows of these assets and is included in securities held-to-maturity, at amortized cost, net in the Consolidated Statements of Financial Condition. 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 Loans – Acquired loans consist of all loans that were acquired in business combinations, including loans which are covered by Federal Deposit Insurance Corporation ("FDIC") Agreements. Acquired loans are included within loans held-for-investment. Acquired loans are separated into (i) non-purchased credit deteriorated ("non-PCD") loans and (ii) purchased credit deteriorated ("PCD") loans. Non-PCD loans include loans that did not have evidence of more-than-insignificant credit deterioration since origination at the acquisition date. PCD loans include loans that had evidence of more-than-insignificant credit deterioration since origination. 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 PCD loans and are accounted for as non-PCD loans. The acquisition adjustment related to non-PCD loans is amortized into interest income over the contractual life of the related loans. If an acquired non-PCD 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. PCD loans are generally accounted for based on estimates of expected future cash flows. The Company uses a discounted cash flow analysis involving significant unobservable inputs and assumptions to measure the fair value of PCD loans. The significant assumptions utilized in the cash flow analysis include the probability of default ("PD"), loss given default ("LGD"), and discount rate. PCD loans are recorded at fair value, excluding credit-related adjustments, for which an allowance for loan losses is established at the acquisition date through purchase accounting adjustments. 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. Subsequent to the acquisition date, the allowance for loan losses on PCD loans is estimated as are the allowances for all other loans in the portfolio. Prior to the adoption of the current expected credit losses ("CECL") accounting guidance on January 1, 2020, acquired loans were separated into (i) non-purchased credit impaired ("non-PCI") loans and (ii) purchased credit impaired ("PCI") loans. The significant accounting policies related to non-PCI and PCI acquired loans are presented in Note 1, "Summary of Significant Accounting Policies" to the Consolidated Financial Statements in the Company's 2019 10-K. 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. Non-accrual loans with balances under a specified threshold are not individually evaluated for impairment. For all other non-accrual 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 effective interest rate. 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. 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 TDRs when the modification is short-term or results in an insignificant delay in payments. The Company's TDRs 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 TDRs 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. Allowance for Credit Losses – The allowance for credit losses is comprised of the allowance for loan losses and the allowance for unfunded commitments and is maintained by management at a level believed adequate to absorb current expected credit losses 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, actual loss experience, consideration of current national, regional, and local economic trends and conditions, reasonable and supportable forecasts about the future, changes in interest rates and property values, various internal and external qualitative factors, 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 allowance for individual loans where the recorded investment exceeds the value, (ii) an allowance based on historical credit loss experience with consideration of reasonable and supportable forecasts of economic conditions for each loan category, and (iii) an allowance based on other internal and external qualitative factors. The allowance for individual loans is based on a periodic analysis of non-accrual loans individually exceeding a specific dollar amount. If the estimated value of a non-accrual loan is less than its recorded book value, the Company either (i) provides an allowance in the amount of the excess of the book value over the estimated value of the related loan or, (ii) if the loss is confirmed, charges off the loss. The allowance by loan category is based on a discounted cash flows analysis as future cash flows are discounted at an effective rate of return. In addition, estimates of losses on future cash flows is forecasted by applying probability of default and loss given default factors as well as prepayment and curtailment assumptions to cash flows that are adjusted to a present value. This discounted cash flow analysis is updated quarterly, primarily using actual loss experience adjusted for current reasonable and supportable forecasts of economic conditions over a one-year forecast period. After the one-year forecast period, a one-year reversion period adjusts loss experience to the historical average on a straight-line basis. These forecasts consider multiple scenarios of key assumptions including national unemployment rates, housing price indices, and gross domestic product. This general allowance 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, regional, 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 includes an allowance on acquired non-PCD and PCD loans. An allowance for loan losses is recorded on acquired PCD loans at the acquisition date through purchase accounting adjustments. Subsequent to the acquisition date, the allowance for loan losses on PCD loans is estimated as are the allowances for all other loans in the portfolio. No allowance for loan losses is recorded on acquired non-PCD loans at the acquisition date through purchase accounting. Instead, an allowance is established on acquired non-PCD loans at the acquisition date in-line with all other loans in the portfolio as if the loans were originated at the acquisition date. On a periodic basis, the adequacy of this allowance is determined using either a PD/LGD methodology or a specific review methodology. Allowance for Unfunded Commitments – The Company also maintains an allowance for unfunded commitments, including letters of credit, for the risk of loss inherent in these arrangements. The allowance for unfunded commitments is estimated using the historical credit loss experience with consideration of reasonable and supportable forecasts of economic conditions for each loan category. The allowance 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 and estimation 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, current national, regional, and local economic trends, reasonable and supportable forecasts about the future, changes in interest rates and property values, the amounts and timing of expected future cash flows on non-accrual loans, estimated losses on pools of homogenous loans, the interpretation of loan risk classifications by regulatory authorities, various internal and external qualitative factors, and other factors. Lease Obligations – The Company leases certain premises under non-cancelable operating leases in the normal course of business operations. These lease obligations result in the recognition of right-of-use assets and associated lease liabilities. The amount of right-of-use assets and associated lease liabilities recorded is based on the present value of future minimum lease payments. Right-of-use assets are amortized on a straight-line basis over the estimated useful lives of the related premises, and interest associated with the net present value of future minimum lease payments is included in net occupancy and equipment expense in the consolidated financial statements. 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, 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 in the same income statement line item as the earnings effect of the hedged item. 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 income (loss) and is reclassified to earnings when the hedged transaction is reflected in earnings.

Recent Accounting Pronouncement

Recent Accounting Pronouncements and Other Guidance	6 Months Ended
	Jun. 30, 2020
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recent Accounting Pronouncements and Other Guidance	RECENT ACCOUNTING PRONOUNCEMENTS AND OTHER GUIDANCE Adopted Accounting Pronouncements Measurement of Credit Losses on Financial Instruments: In June of 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standard Update ("ASU") 2016-13 that requires 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 are 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. The Company adopted this guidance on January 1, 2020, which resulted in the recognition of $76.0 million of allowance for credit losses which includes $26.0 million attributable to loans, $5.6 million attributable to unfunded commitments, $35.7 million attributable to PCD loans, $8.5 million attributable to non-PCD acquired loans, and $220,000 attributable to securities held-to-maturity. The portion of the allowance for credit losses attributable to PCD loans did not have an impact on equity as the credit-related portion of acquisition adjustments on loans previously classified as PCI transitioned to PCD accounting treatment upon adoption. The amount of allowance for credit losses recognized upon adoption was based on the composition of the loan portfolio, as well as the economic conditions and forecasts as of the adoption date. The Company adopted this guidance using the modified retrospective approach which resulted in the recognition of a $26.8 million after-tax reduction to retained earnings as a cumulative-effect adjustment on January 1, 2020. Prior period amounts continue to be reported in accordance with previously applicable standards and the accounting policies described in the Company's 2019 10-K. The Company has made the following elections upon adoption of ASU 2016-13: • When determining the allowance and net carrying value amount for financial assets in which the repayment is expected to be provided substantially through the operation or sale of the collateral when the borrower is experiencing financial difficulty, the Company will use the fair value of collateral at the reporting date. • The Company writes off uncollectible accrued interest in a timely manner and, therefore, will not measure an allowance for credit losses for accrued interest receivable. • The Company uses a discounted cash flow approach for the majority of its applicable instruments. The change in the present value from one reporting period to the next may result from the passage of time, in addition to changes in estimates of the timing of the cash flows. The Company will report the entire change in the present value as provision for loan losses (or reversal of provision for loan losses) versus reporting the change related to the passage of time as interest income. For additional discussion of the allowance for credit losses, see Note 7 "Past Due Loans, Allowance for Credit Losses, Non-Accrual Loans, and TDRs." Accounting for Goodwill Impairment: In January of 2017, the FASB issued ASU 2017-04 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. The adoption of this guidance on January 1, 2020 did not materially impact the Company's financial condition, results of operations, or liquidity. Changes to the Disclosure Requirements for Fair Value Measurement: In August of 2018, the FASB issued ASU 2018-13 that eliminates, modifies, and adds to certain fair value measurement disclosure requirements associated with the three-tiered fair value hierarchy. This guidance is effective for annual and interim periods beginning after December 15, 2019. The adoption of this guidance on January 1, 2020 did not materially impact the Company's financial condition, results of operations, or liquidity. Loan Modifications Due to COVID-19: In March of 2020, the CARES Act was enacted by the U.S. government in response to the economic disruption caused by the COVID-19 pandemic (the "pandemic"). The Company's banking regulators issued a statement titled the "Interagency Statement on Loan Modifications by Financial Institutions Working with Customers Affected by the Coronavirus" that encourages financial institutions to work prudently with borrowers who are or may be unable to meet their contractual payment obligations due to the effects of the pandemic. Additionally, the CARES Act provides that a qualified loan modification is exempt by law from classification as a TDR as defined by GAAP, from the period beginning March 1, 2020 until the earlier of December 31, 2020 or the date that is 60 days after the date on which the national emergency concerning the pandemic declared by the President of the United States terminates. Accordingly, the Company is offering short-term modifications made in response to the pandemic to borrowers who are current and otherwise not past due. These include short-term modifications in the form of payment deferrals, fee waivers, extensions of repayment terms, or other delays in payment that are insignificant. The total balance of loans with eligible modifications as of June 30, 2020 was $1.9 billion. Regulatory Capital Delay of CECL Impact: In February of 2019, the federal bank regulatory agencies issued a final rule, the 2019 CECL Rule, that revised certain capital regulations to account for changes to credit loss accounting under U.S. GAAP. The 2019 CECL Rule included a transition option that allows banking organizations to phase in, over a three-year period, the day-one adverse effects of CECL on their regulatory capital ratios (three-year transition option). In March of 2020, the federal bank regulatory agencies issued an interim final rule that maintains the three year transition option of the 2019 CECL Rule and also provides banking organizations that were required under GAAP (as of January 2020) to implement CECL before the end of 2020 the option to delay for two years an estimate of the effect of CECL on regulatory capital, relative to the incurred loss methodology's effect on regulatory capital, followed by a three-year transition period (five-year transition option). The Company elected to adopt the five-year transition option. This election of the transition option is applicable only to regulatory capital computations under federal banking regulations and does not otherwise impact the financial statements prepared in accordance with GAAP. Accounting Pronouncements Pending Adoption Changes to the Disclosure Requirements for Defined Benefit Plans: In August of 2018, the FASB issued ASU 2018-14 that makes minor changes and clarifications to the disclosure requirements for entities that sponsor defined benefit plans. This guidance is effective for annual and interim periods beginning after December 15, 2020. 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. Income Taxes : In December of 2019, the FASB issued ASU 2019-12 that removes certain exceptions to the general principles of accounting for income taxes. This guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. 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. Reference Rate Reform : In March of 2020, the FASB issued ASU 2020-04 that provides optional expedients and exceptions for applying GAAP to contracts and other transactions affected by reference rate reform, if certain criteria are met. This guidance is effective as of March 12, 2020 through December 31, 2022. Management is in the process of determining the impact on the Company's financial condition, results of operations, and liquidity.

Acquisitions

Acquisitions	6 Months Ended
	Jun. 30, 2020
Business Combinations [Abstract]
Acquisitions	ACQUISITIONS Completed Acquisitions Park Bank On March 9, 2020, the Company completed its acquisition of Bankmanagers Corp. ("Bankmanagers"), the holding company for Park Bank, based in Milwaukee Wisconsin. At closing, the Company acquired $1.2 billion of assets, $1.0 billion of deposits, and $685.5 million of loans, net of fair value adjustments. Under the terms of the merger agreement, on March 9, 2020, each outstanding share of Bankmanagers common stock was exchanged for 29.9675 shares of Company common stock, plus $623.02 of cash (of which $346.00 per share was paid by Bankmanagers to its shareholders by a special cash dividend immediately prior to closing). This resulted in merger consideration of $174.4 million, which consisted of 4.9 million shares of Company common stock and $102.5 million of cash. Goodwill of $62.4 million associated with the acquisition was recorded by the Company. All Park Bank operating systems were converted to the Company's operating platform during the second quarter of 2020. The fair value adjustments, including goodwill, associated with the transaction remain preliminary and may change as the Company continues to finalize the fair value of the assets and liabilities acquired. During the second quarter of 2020, the Company updated the fair value adjustments associated with the Bankmanagers transaction. These adjustments were recognized in the current period in accordance with accounting guidance applicable to business combinations. Bridgeview Bank Group On May 9, 2019, the Company completed its acquisition of Bridgeview Bancorp, Inc. ("Bridgeview"), the holding company for Bridgeview Bank Group. At closing, the Company acquired $1.2 billion of assets, $1.0 billion of deposits, and $709.4 million of loans, net of fair value adjustments. Under the terms of the merger agreement, on May 9, 2019, each outstanding share of Bridgeview common stock was exchanged for 0.2767 shares of Company common stock, plus $1.66 of cash. In addition, each outstanding Bridgeview stock option was exchanged for the right to receive cash. This resulted in merger consideration of $135.4 million, which consisted of 4.7 million shares of Company common stock and $37.1 million of cash. Goodwill of $63.2 million associated with the acquisition was recorded by the Company. All Bridgeview operating systems were converted to the Company's operating platform during the second quarter of 2019. During the second quarter of 2020, the Company finalized the fair value adjustments associated with the Bridgeview transaction, which required measurement period adjustments to goodwill. These adjustments were recognized in the current period in accordance with accounting guidance applicable to business combinations. Northern Oak Wealth Management, Inc. On January 16, 2019, the Company completed its acquisition of Northern Oak Wealth Management, Inc., a registered investment adviser based in Milwaukee, Wisconsin with approximately $800.0 million of assets under management at closing. During the first quarter of 2020, the Company finalized the fair value adjustments associated with the Northern Oak transaction, which required a measurement period adjustment to 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 Park Bank and Bridgeview 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 (Dollar amounts in thousands, except share and per share data) Park Bank Bridgeview March 9, 2020 May 9, 2019 Assets Cash and due from banks and interest-bearing deposits in other banks $ 244,781 $ 35,097 Equity securities — 6,966 Securities available-for-sale 136,856 263,090 Securities held-to-maturity 300 13,426 FHLB and FRB stock — 1,481 Loans 685,451 709,438 OREO 2,001 5,436 Goodwill 62,433 63,231 Other intangible assets 3,068 15,603 Premises, furniture, and equipment 2,550 16,138 Accrued interest receivable and other assets 13,796 35,909 Total assets $ 1,151,236 $ 1,165,815 Liabilities Noninterest-bearing deposits $ 356,050 $ 179,267 Interest-bearing deposits 594,026 807,487 Total deposits 950,076 986,754 Borrowed funds 11,532 1,746 Senior and subordinated debt — 29,360 Accrued interest payable and other liabilities 15,246 12,603 Total liabilities 976,854 1,030,463 Consideration Paid Common stock (2020 – 4,930,231, shares issued at $14.58 per share, 2019 – 4,728,541, shares issued at $20.77 per share), net of issuance costs 71,883 98,212 Cash paid 102,499 37,140 Total consideration paid 174,382 135,352 $ 1,151,236 $ 1,165,815 Expenses related to the acquisition and integration of completed and pending transactions are reported as a separate component within noninterest expense in the Condensed Consolidated Statements of Income. For the quarter and six months ended June 30, 2020, these expenses totaled $5.2 million and $10.7 million respectively, and for the same periods in 2019, these expenses totaled $9.5 million and $13.2 million, respectively.

Securities

Securities	6 Months Ended
	Jun. 30, 2020
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 2019 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 June 30, 2020 As of December 31, 2019 Amortized Cost Gross Unrealized Fair Amortized Cost Gross Unrealized Fair Gains Losses Gains Losses Securities Available-for-Sale U.S. treasury securities $ 20,992 $ 207 $ — $ 21,199 $ 33,939 $ 137 $ (1) $ 34,075 U.S. agency securities 640,253 4,166 (1,372) 643,047 249,502 758 (1,836) 248,424 Collateralized mortgage obligations 1,624,609 49,059 (1,539) 1,672,129 1,547,805 14,893 (5,027) 1,557,671 Other mortgage-backed securities 695,218 20,159 (237) 715,140 678,804 7,728 (1,848) 684,684 Municipal securities 229,414 10,410 (21) 239,803 228,632 5,898 (99) 234,431 Corporate debt securities 143,639 2,367 (1,462) 144,544 112,797 1,791 (487) 114,101 Total securities available-for-sale $ 3,354,125 $ 86,368 $ (4,631) $ 3,435,862 $ 2,851,479 $ 31,205 $ (9,298) $ 2,873,386 Securities Held-to-Maturity Municipal securities $ 19,848 $ 48 $ — $ 19,896 $ 21,997 $ — $ (763) $ 21,234 Allowance for securities held-to- maturity (1) (220) $ (220) Total securities held-to-maturity, $ 19,628 $ 48 $ — $ 19,676 Equity Securities $ 43,954 $ 42,136 (1) The allowance for securities held-to-maturity was established upon adoption of CECL on January 1, 2020. Accrued interest receivable on the securities portfolio totaled $13.6 million and $11.3 million as of June 30, 2020 and December 31, 2019, respectively, and is included in accrued interest receivable and other assets in the Consolidated Statements of Financial Condition. Accounting guidance requires that the credit portion of a decline in fair value be recognized as an allowance for credit losses, established as a charge to expense 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 (loss). In determining whether a decline in fair value of a security is credit related, the Company considers adverse conditions specific to the security, deterioration in economic conditions or market environment that may affect the value of the securities and related collateral, if any, events of default, changes to the credit rating of the security by a rating agency, and guarantees applicable to the security, among other factors. Remaining Contractual Maturity of Securities (Dollar amounts in thousands) As of June 30, 2020 Available-for-Sale Held-to-Maturity Amortized Fair Amortized Fair One year or less $ 270,623 $ 274,363 $ 8,070 $ 8,089 After one year to five years 185,159 187,718 5,452 5,465 After five years to ten years 578,516 586,512 3,315 3,323 After ten years — — 2,791 2,799 Securities that do not have a single contractual maturity date 2,319,827 2,387,269 — — Total $ 3,354,125 $ 3,435,862 $ 19,628 $ 19,676 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 $1.5 billion as of June 30, 2020 and $1.3 billion as of December 31, 2019. No securities held-to-maturity were pledged as of June 30, 2020 or December 31, 2019. There were realized losses of $1.0 million on securities available-for-sale for six months ended June 30, 2020 and no realized gains (losses) for the quarters ended June 30, 2020 and 2019 and six months ended June 30, 2019. The following table presents the aggregate amount of unrealized losses and the aggregate related fair values of securities with unrealized losses as of June 30, 2020 and December 31, 2019. Securities in an Unrealized Loss Position (Dollar amounts in thousands) Less Than 12 Months 12 Months or Longer Total Number of Fair Unrealized Fair Unrealized Fair Unrealized As of June 30, 2020 Securities Available-for-Sale U.S. agency securities 23 $ 73,659 $ 1,149 $ 13,927 $ 223 $ 87,586 $ 1,372 CMOs 41 139,578 1,379 33,967 160 173,545 1,539 MBSs 14 64,778 223 3,805 14 68,583 237 Municipal securities 1 1,745 21 — — 1,745 21 Corporate debt securities 11 39,949 154 38,199 1,308 78,148 1,462 Total 90 $ 319,709 $ 2,926 $ 89,898 $ 1,705 $ 409,607 $ 4,631 As of December 31, 2019 Securities Available-for-Sale U.S. treasury securities 5 $ 4,966 $ 1 $ — $ — $ 4,966 $ 1 U.S. agency securities 52 97,729 1,200 49,387 636 147,116 1,836 CMOs 148 187,470 2,177 412,083 2,850 599,553 5,027 MBSs 59 66,340 996 121,861 852 188,201 1,848 Municipal securities 16 9,384 89 3,104 10 12,488 99 Corporate debt securities 6 9,719 281 21,955 206 31,674 487 Total 286 $ 375,608 $ 4,744 $ 608,390 $ 4,554 $ 983,998 $ 9,298 Substantially all of the Company's CMOs 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 June 30, 2020 represent impairment 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.

Loans

Loans	6 Months Ended
	Jun. 30, 2020
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 June 30, December 31, Commercial and industrial $ 4,789,556 $ 4,481,525 Agricultural 381,124 405,616 Commercial real estate: Office, retail, and industrial 2,020,318 1,848,718 Multi-family 874,861 856,553 Construction 687,063 593,093 Other commercial real estate 1,475,937 1,383,708 Total commercial real estate 5,058,179 4,682,072 Total corporate loans, excluding Paycheck Protection Program ("PPP") loans 10,228,859 9,569,213 PPP loans 1,179,403 — Total corporate loans 11,408,262 9,569,213 Home equity 892,867 851,454 1-4 family mortgages 2,175,322 1,927,078 Installment 457,207 492,585 Total consumer loans 3,525,396 3,271,117 Total loans $ 14,933,658 $ 12,840,330 Deferred loan fees included in total loans $ 9,691 $ 7,972 Overdrawn demand deposits included in total loans 7,676 10,675 Accrued interest receivable on the loan portfolio totaled $49.5 million and $48.4 million as of June 30, 2020 and December 31, 2019, respectively and is included in accrued interest receivable and other assets in the Consolidated Statements of Financial Condition. 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 2019 10-K. Loan Sales The following table presents loan sales and purchases for the quarters and six months ended June 30, 2020 and 2019. Loan Sales and Purchases (Dollar amounts in thousands) Quarters Ended Six Months Ended 2020 2019 2020 2019 Corporate loan sales Proceeds from sales $ 295 $ 2,178 $ 4,598 $ 5,376 Less book value of loans sold 289 2,132 4,477 5,248 Net gains on corporate loan sales (1) 6 46 121 128 1-4 family mortgage loan sales Proceeds from sales 173,251 95,408 292,410 154,191 Less book value of loans sold 168,656 93,473 285,301 150,928 Net gains on 1-4 family mortgage loan sales (2) 4,595 1,935 7,109 3,263 Total net gains on loan sales $ 4,601 $ 1,981 $ 7,230 $ 3,391 Corporate loan purchases (3) Commercial and industrial $ 22,894 $ 128,891 $ 168,716 $ 181,610 Office, retail, and industrial — 1,711 — 1,711 Construction 3,258 1,432 3,897 2,266 Other commercial real estate 10,000 — 10,000 3,986 Total corporate loan purchases $ 36,152 $ 132,034 $ 182,613 $ 189,573 Consumer loan purchases Home equity $ — $ 39,159 $ 144,967 $ 77,411 1-4 family mortgages 179,410 231,533 249,585 304,463 Total consumer loan purchases $ 179,410 $ 270,692 $ 394,552 $ 381,874 (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. (3) Consists of the Company's portion of loan participations purchased. 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. For additional disclosure related to the Company's obligations resulting from the sale of certain 1-4 family mortgage loans, see Note 13, "Commitments, Guarantees, and Contingent Liabilities."

Acquired Loans

Acquired Loans	6 Months Ended
	Jun. 30, 2020
Transfers and Servicing [Abstract]
Acquired Loans	ACQUIRED LOANS The significant accounting policies related to acquired loans, which are classified as PCD and non-PCD at June 30, 2020, are presented in Note 1, "Summary of Significant Accounting Policies." The following table presents the carrying amount of acquired loans as of June 30, 2020 and December 31, 2019. Acquired Loans (1)(2) (Dollar amounts in thousands) As of June 30, 2020 As of December 31, 2019 PCD Non-PCD Total PCI Non-PCI Total Acquired loans $ 243,207 $ 1,516,157 $ 1,759,364 $ 167,183 $ 1,216,133 $ 1,383,316 (1) Included in loans in the Consolidated Statements of Financial Condition. (2) Prior to the adoption of CECL on January 1, 2020, 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 were classified as PCI. The outstanding balance of PCD loans was $284.3 million as of June 30, 2020 and the outstanding balance of PCI loans was $243.0 million as of December 31, 2019.

Past Due Loans, Allowance For C

Past Due Loans, Allowance For Credit Losses, Non-Accrual Loans, and TDRS	6 Months Ended
	Jun. 30, 2020
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Past Due Loans, Allowance For Credit Losses, Non-Accrual Loans, and TDRS	PAST DUE LOANS, ALLOWANCE FOR CREDIT LOSSES, NON-ACCRUAL 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 June 30, 2020 and December 31, 2019 with balances presented on an amortized cost basis. 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 (1) (Dollar amounts in thousands) Aging Analysis (Accruing and Non-accrual) Non-performing Loans Current 30-89 Days 90 Days or Total Total Non- 90 Days or More Past Due, Still Accruing Interest As of June 30, 2020 Commercial and industrial $ 4,750,932 $ 20,550 $ 18,074 $ 38,624 $ 4,789,556 $ 28,349 $ 1,090 Agricultural 373,910 — 7,214 7,214 381,124 8,494 — Commercial real estate: Office, retail, and industrial 1,982,798 4,973 32,547 37,520 2,020,318 35,915 596 Multi-family 870,430 1,538 2,893 4,431 874,861 3,121 — Construction 658,892 801 27,370 28,171 687,063 27,282 88 Other commercial real estate 1,458,874 5,145 11,918 17,063 1,475,937 18,372 25 Total commercial real estate 4,970,994 12,457 74,728 87,185 5,058,179 84,690 709 Total corporate loans, 10,095,836 33,007 100,016 133,023 10,228,859 121,533 1,799 PPP loans 1,179,403 — — — 1,179,403 — — Total corporate loans 11,275,239 33,007 100,016 133,023 11,408,262 121,533 1,799 Home equity 885,678 2,641 4,548 7,189 892,867 9,129 187 1-4 family mortgages 2,164,611 4,928 5,783 10,711 2,175,322 8,498 — Installment 454,996 956 1,255 2,211 457,207 — 1,255 Total consumer loans 3,505,285 8,525 11,586 20,111 3,525,396 17,627 1,442 Total loans $ 14,780,524 $ 41,532 $ 111,602 $ 153,134 $ 14,933,658 $ 139,160 $ 3,241 As of December 31, 2019 Commercial and industrial $ 4,455,381 $ 11,468 $ 14,676 $ 26,144 $ 4,481,525 $ 29,995 $ 2,207 Agricultural 398,676 850 6,090 6,940 405,616 5,954 358 Commercial real estate: Office, retail, and industrial 1,830,321 2,943 15,454 18,397 1,848,718 25,857 546 Multi-family 853,762 211 2,580 2,791 856,553 2,697 — Construction 588,065 4,876 152 5,028 593,093 152 — Other commercial real estate 1,377,678 3,233 2,797 6,030 1,383,708 4,729 529 Total commercial real estate 4,649,826 11,263 20,983 32,246 4,682,072 33,435 1,075 Total corporate loans 9,503,883 23,581 41,749 65,330 9,569,213 69,384 3,640 Home equity 841,908 4,992 4,554 9,546 851,454 8,443 146 1-4 family mortgages 1,917,648 5,452 3,978 9,430 1,927,078 4,442 1,203 Installment 491,406 1,167 12 1,179 492,585 — 12 Total consumer loans 3,250,962 11,611 8,544 20,155 3,271,117 12,885 1,361 Total loans $ 12,754,845 $ 35,192 $ 50,293 $ 85,485 $ 12,840,330 $ 82,269 $ 5,001 (1) Prior to the adoption of CECL on January 1, 2020, purchased credit impaired ("PCI") loans with an accretable yield were considered current and were not included in past due loan totals. In addition, PCI loans with an accretable yield were excluded from non-accrual loans. Subsequent to adoption, PCD loans, including those previously classified as PCI, are included in past due and non-accrual loan totals. In addition, an allowance for credit losses is established as of the acquisition date or upon the adoption of CECL for loans previously classified as PCI, as PCD loans are no longer recorded net of a credit-related acquisition adjustment. Allowance for Credit Losses The Company maintains an allowance for credit losses at a level deemed adequate by management to absorb estimated losses expected in the existing loan portfolio. See Note 1, "Summary of Significant Accounting Policies," for the accounting policy for the allowance for credit losses. A rollforward of the allowance for credit losses by portfolio segment for the quarters and six months ended June 30, 2020 and 2019 is presented in the table below. PPP loans are excluded from this table as there is no allowance for credit losses associated with these loans due to guarantees. Allowance for Credit Losses by Portfolio Segment (Dollar amounts in thousands) Commercial, Office, Multi- Construction Other Consumer Allowance for Total Quarter Ended June 30, 2020 Beginning balance $ 113,733 $ 25,856 $ 3,689 $ 11,297 $ 18,554 $ 46,819 $ 6,753 $ 226,701 Allowance established 378 — — — — — 872 1,250 Charge-offs (5,673) (3,092) (9) (798) (31) (4,631) — (14,234) Recoveries 820 6 — — 12 473 — 1,311 Net charge-offs (4,853) (3,086) (9) (798) (19) (4,158) — (12,923) Provision for loan 14,719 1,671 1,631 1,023 3,327 10,278 — 32,649 Ending balance $ 123,977 $ 24,441 $ 5,311 $ 11,522 $ 21,862 $ 52,939 $ 7,625 $ 247,677 Quarter Ended June 30, 2019 Beginning balance $ 64,685 $ 7,679 $ 2,216 $ 2,131 $ 4,930 $ 21,938 $ 1,200 $ 104,779 Charge-offs (6,516) (1,605) — — (329) (2,974) — (11,424) Recoveries 1,258 151 — 10 45 619 — 2,083 Net charge-offs (5,258) (1,454) — 10 (284) (2,355) — (9,341) Provision for loan 6,937 1,270 (57) (279) 351 3,269 — 11,491 Ending balance $ 66,364 $ 7,495 $ 2,159 $ 1,862 $ 4,997 $ 22,852 $ 1,200 $ 106,929 Six Months Ended June 30, 2020 Beginning balance $ 62,830 $ 7,580 $ 2,950 $ 1,697 $ 6,408 $ 26,557 $ 1,200 $ 109,222 Adjustment to apply recent accounting pronouncements (1) 20,159 11,686 397 10,300 11,427 16,235 5,553 75,757 Allowance established 12,640 2,003 — — — 39 872 15,554 Charge-offs (12,739) (3,430) (19) (2,606) (339) (9,031) — (28,164) Recoveries 1,979 15 5 — 156 972 — 3,127 Net charge-offs (10,760) (3,415) (14) (2,606) (183) (8,059) — (25,037) Provision for loan 39,108 6,587 1,978 2,131 4,210 18,167 — 72,181 Ending balance $ 123,977 $ 24,441 $ 5,311 $ 11,522 $ 21,862 $ 52,939 $ 7,625 $ 247,677 Six Months Ended June 30, 2019 Beginning balance $ 63,276 $ 7,900 $ 2,464 $ 2,173 $ 4,934 $ 21,472 $ 1,200 $ 103,419 Charge-offs (12,967) (2,233) (340) (6) (539) (6,116) — (22,201) Recoveries 2,559 161 1 16 66 973 — 3,776 Net charge-offs (10,408) (2,072) (339) 10 (473) (5,143) — (18,425) Provision for loan 13,496 1,667 34 (321) 536 6,523 — 21,935 Ending balance $ 66,364 $ 7,495 $ 2,159 $ 1,862 $ 4,997 $ 22,852 $ 1,200 $ 106,929 (1) As a result of accounting guidance adopted in the first quarter of 2020, the increase in allowance for credit losses, net of tax, was recognized as a cumulative-effect adjustment to retained earnings as of January 1, 2020. For further discussion of this guidance, see Note 2, "Recent Accounting Pronouncements and Other Guidance." The allowance for credit losses increased from December 31, 2019 primarily due to the adoption of CECL and the estimated impact of the pandemic on the allowance for credit losses, which considers multiple macroeconomic scenarios of stressed GDP, unemployment, and housing price index, detailed portfolio reviews of elevated risk sectors, and the effects of governmental responses to the pandemic. The table below provides a breakdown of loans and the related allowance for credit losses by portfolio segment as of June 30, 2020 and December 31, 2019. Loans and Related Allowance for Credit Losses by Portfolio Segment (Dollar amounts in thousands) Loans Allowance for Credit Losses Individually Collectively PCD/PCI (1) Total Individually Collectively PCD/PCI (1) Total As of June 30, 2020 Commercial, industrial, $ 25,190 $ 5,049,876 $ 95,614 $ 5,170,680 $ 4,805 $ 102,735 $ 16,437 $ 123,977 Commercial real estate: Office, retail, and industrial 25,165 1,956,597 38,556 2,020,318 885 14,964 8,592 24,441 Multi-family 1,785 871,545 1,531 874,861 — 5,126 185 5,311 Construction 18,611 646,355 22,097 687,063 — 4,624 6,898 11,522 Other commercial real estate 3,806 1,410,080 62,051 1,475,937 44 10,332 11,486 21,862 Total commercial real estate 49,367 4,884,577 124,235 5,058,179 929 35,046 27,161 63,136 Total corporate loans, 74,557 9,934,453 219,849 10,228,859 5,734 137,781 43,598 187,113 PPP loans — 1,179,403 — 1,179,403 — — — — Total corporate loans 74,557 11,113,856 219,849 11,408,262 5,734 137,781 43,598 187,113 Consumer 23 3,502,015 23,358 3,525,396 — 52,103 836 52,939 Allowance for unfunded — — — — — 7,625 — 7,625 Total loans $ 74,580 $ 14,615,871 $ 243,207 $ 14,933,658 $ 5,734 $ 197,509 $ 44,434 $ 247,677 As of December 31, 2019 Commercial, industrial, and $ 34,142 $ 4,807,114 $ 45,885 $ 4,887,141 $ 3,414 $ 59,108 $ 308 $ 62,830 Commercial real estate: Office, retail, and industrial 24,820 1,795,557 28,341 1,848,718 578 6,899 103 7,580 Multi-family 1,995 851,857 2,701 856,553 — 2,854 96 2,950 Construction 123 581,747 11,223 593,093 — 1,681 16 1,697 Other commercial real estate 3,241 1,323,635 56,832 1,383,708 — 4,867 1,541 6,408 Total commercial real estate 30,179 4,552,796 99,097 4,682,072 578 16,301 1,756 18,635 Total corporate loans 64,321 9,359,910 144,982 9,569,213 3,992 75,409 2,064 81,465 Consumer — 3,248,916 22,201 3,271,117 — 25,424 1,133 26,557 Allowance for unfunded — — — — — 1,200 — 1,200 Total loans $ 64,321 $ 12,608,826 $ 167,183 $ 12,840,330 $ 3,992 $ 102,033 $ 3,197 $ 109,222 (1) Prior to the adoption of CECL on January 1, 2020, 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 were classified as PCI. The following table presents collateral-dependent loans, including PCD loans, without regard to accrual status by primary collateral type and non-accrual loans with no related allowance as of June 30, 2020. PPP loans are excluded from this table as there is no allowance for credit losses associated with these loans due to guarantees. Collateral-dependent Loans and Non-accrual Loans With No Related Allowance by Class (Dollar amounts in thousands) Type of Collateral Non-accrual Loans Real Blanket Equipment Commercial and industrial $ 6,870 $ 45,235 $ 3,169 $ 6,338 Agricultural 3,417 4,719 — 4,485 Commercial real estate: Office, retail, and industrial 44,538 — — 17,293 Multi-family 2,606 — — 1,785 Construction 28,779 — — 19,043 Other commercial real estate 33,845 — — 11,789 Total commercial real estate 109,768 — — 49,910 Total corporate loans 120,055 49,954 3,169 60,733 Home equity 244 — — 123 1-4 family mortgages 2,665 — — 527 Installment — — — — Total consumer loans 2,909 — — 650 Total loans $ 122,964 $ 49,954 $ 3,169 $ 61,383 Loans Individually Evaluated The following table presents loans individually evaluated by class of loan as of June 30, 2020 and December 31, 2019. PCD and PCI loans are excluded from this disclosure. Loans Individually Evaluated by Class (Dollar amounts in thousands) As of June 30, 2020 As of December 31, 2019 Recorded Investment In Recorded Investment In Loans with Loans with Unpaid Specific Loans with Loans with Unpaid Specific Commercial and industrial $ 4,884 $ 12,170 $ 37,153 $ 3,018 $ 12,885 $ 15,516 $ 52,559 $ 2,456 Agricultural 4,485 3,651 13,032 1,787 1,889 3,852 9,293 958 Commercial real estate: Office, retail, and industrial 15,839 9,326 28,730 885 14,111 10,709 37,007 578 Multi-family 1,785 — 1,785 — 1,995 — 1,995 — Construction 18,611 — 18,611 — 123 — 123 — Other commercial real estate 3,357 449 4,103 44 3,241 — 3,495 — Total commercial real estate 39,592 9,775 53,229 929 19,470 10,709 42,620 578 Total corporate loans 48,961 25,596 103,414 5,734 34,244 30,077 104,472 3,992 Consumer 23 — 23 — — — — — Total non-accrual loans $ 48,984 $ 25,596 $ 103,437 $ 5,734 $ 34,244 $ 30,077 $ 104,472 $ 3,992 Interest income recognized on non-accrual loans using the cash basis of accounting for the quarters ended and six months ended June 30, 2020 and 2019 was $110,000 and $388,000, respectively, and $69,000 and $148,000 for the same periods in 2019. 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 at least annually or more often if events or circumstances arise that could impact the rating. The following tables present credit quality indicators for corporate and consumer loans on an amortized cost basis as of June 30, 2020 and net loan charge-offs for the six months ended June 30, 2020. PPP loans are excluded from this table as there is no allowance for credit losses associated with these loans due to guarantees. Corporate Loan Portfolio by Origination Year (Dollar amounts in thousands) 2020 (1) 2019 2018 2017 2016 Prior Revolving Loans Total Commercial, industrial, agricultural: Pass $ 461,644 $ 887,292 $ 924,776 $ 519,875 $ 238,751 $ 469,442 $ 1,364,316 $ 4,866,096 Special Mention (2) 3,508 6,520 31,435 4,676 8,527 17,568 80,597 152,831 Substandard (3) 384 4,376 26,729 17,862 16,583 15,804 33,172 114,910 Non-accrual (4) — 1,771 2,381 8,505 4,806 6,682 12,698 36,843 Total commercial, $ 465,536 $ 899,959 $ 985,321 $ 550,918 $ 268,667 $ 509,496 $ 1,490,783 $ 5,170,680 Commercial, industrial, $ — $ 250 $ 946 $ 1,058 $ 617 $ 1,853 $ 6,036 $ 10,760 Office, retail, and industrial: Pass $ 95,291 $ 266,479 $ 225,938 $ 348,121 $ 302,430 $ 677,880 $ 5,491 $ 1,921,630 Special Mention (2) 1,173 655 3,280 5,091 15,439 12,914 — 38,552 Substandard (3) — — — 337 1,514 22,370 — 24,221 Non-accrual (4) — — 132 — 10,238 25,545 — 35,915 Total office, retail, $ 96,464 $ 267,134 $ 229,350 $ 353,549 $ 329,621 $ 738,709 $ 5,491 $ 2,020,318 Office, retail, and $ — $ 333 $ 156 $ — $ 1,628 $ 1,298 $ — $ 3,415 Multi-family: Pass $ 125,328 $ 174,802 $ 84,791 $ 101,492 $ 101,846 $ 239,713 $ 36,111 $ 864,083 Special Mention (2) — — — — 358 1,416 — 1,774 Substandard (3) — — 387 81 — 5,415 — 5,883 Non-accrual (4) — — — 1,785 237 1,099 — 3,121 Total multi-family $ 125,328 $ 174,802 $ 85,178 $ 103,358 $ 102,441 $ 247,643 $ 36,111 $ 874,861 Multi-family net loan $ — $ 3 $ — $ 1 $ — $ 10 $ — $ 14 Construction: Pass $ 33,890 $ 151,849 $ 171,480 $ 101,781 $ 71,001 $ 70,950 $ 33,016 $ 633,967 Special Mention (2) — — 45 3,032 14,221 1,228 — 18,526 Substandard (3) — — — — — 7,288 — 7,288 Non-accrual (4) — — — — — 25,591 1,691 27,282 Total construction $ 33,890 $ 151,849 $ 171,525 $ 104,813 $ 85,222 $ 105,057 $ 34,707 $ 687,063 Construction net loan $ — $ 118 $ — $ 798 $ — $ 1,690 $ — $ 2,606 Other commercial real estate: Pass $ 61,056 $ 195,768 $ 269,526 $ 226,064 $ 125,249 $ 466,436 $ 27,553 $ 1,371,652 Special Mention (2) — 3,532 7,589 6,887 11,219 15,463 — 44,690 Substandard (3) — — — 1,400 4,224 35,599 — 41,223 Non-accrual (4) — — 674 4,150 1,078 12,377 93 18,372 Total other $ 61,056 $ 199,300 $ 277,789 $ 238,501 $ 141,770 $ 529,875 $ 27,646 $ 1,475,937 Other commercial real $ — $ 38 $ 1 $ — $ 183 $ (39) $ — $ 183 (1) Represents year-to-date loans originated during 2020. (2) 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. (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. Consumer Loan Portfolio by Origination Year (Dollar amounts in thousands) 2020 (1) 2019 2018 2017 2016 Prior Revolving Loans Total Home equity: Performing $ 8,231 $ 48,696 $ 27,783 $ 13,809 $ 11,878 $ 57,053 $ 716,288 $ 883,738 Non-accrual — 22 125 264 482 6,801 1,435 9,129 Total home equity $ 8,231 $ 48,718 $ 27,908 $ 14,073 $ 12,360 $ 63,854 $ 717,723 $ 892,867 Home equity net $ — $ — $ 1 $ — $ 1 $ 42 $ (14) $ 30 1-4 family mortgages: Performing $ 597,506 $ 676,898 $ 311,884 $ 158,230 $ 181,912 $ 240,394 $ — $ 2,166,824 Non-accrual — — 438 83 63 7,914 — 8,498 Total 1-4 family $ 597,506 $ 676,898 $ 312,322 $ 158,313 $ 181,975 $ 248,308 $ — $ 2,175,322 1-4 family mortgages $ — $ — $ 4 $ — $ 7 $ 735 $ — $ 746 Installment: Performing $ 59,971 $ 185,919 $ 107,220 $ 45,108 $ 17,563 $ 20,662 $ 20,764 $ 457,207 Non-accrual — — — — — — — — Total installment $ 59,971 $ 185,919 $ 107,220 $ 45,108 $ 17,563 $ 20,662 $ 20,764 $ 457,207 Installment net loan $ 44 $ 3,757 $ 2,200 $ 775 $ 85 $ 393 $ 29 $ 7,283 (1) Represents year-to-date loans originated during 2020. During the quarter and six months ended June 30, 2020, $16.8 million and $23.8 million, respectively, of revolving loans converted to term loans. The following tables present credit quality indicators by class for corporate and consumer loans on an amortized cost basis as of December 31, 2019. Corporate Credit Quality Indicators by Class (Dollar amounts in thousands) Pass Special Mention (1) Substandard (2) Non-accrual (3) Total As of December 31, 2019 Commercial and industrial $ 4,324,709 $ 47,665 $ 79,156 $ 29,995 $ 4,481,525 Agricultural 350,827 32,764 16,071 5,954 405,616 Commercial real estate: Office, retail, and industrial 1,747,287 42,230 33,344 25,857 1,848,718 Multi-family 839,615 8,279 5,962 2,697 856,553 Construction 564,495 17,977 10,469 152 593,093 Other commercial real estate 1,295,155 39,788 44,036 4,729 1,383,708 Total commercial real estate 4,446,552 108,274 93,811 33,435 4,682,072 Total corporate loans $ 9,122,088 $ 188,703 $ 189,038 $ 69,384 $ 9,569,213 (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 a well-defined weakness 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 a well-defined weakness that may jeopardize the liquidation of the debt or result in a loss if the deficiencies are not corrected. Consumer Credit Quality Indicators by Class (Dollar amounts in thousands) Performing Non-accrual Total As of December 31, 2019 Home equity $ 843,011 $ 8,443 $ 851,454 1-4 family mortgages 1,922,636 4,442 1,927,078 Installment 492,585 — 492,585 Total consumer loans $ 3,258,232 $ 12,885 $ 3,271,117 TDRs TDRs 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 TDRs by class as of June 30, 2020 and December 31, 2019. See Note 1, "Summary of Significant Accounting Policies," for the accounting policy for TDRs. TDRs by Class (Dollar amounts in thousands) As of June 30, 2020 As of December 31, 2019 Accruing Non-accrual (1) Total Accruing Non-accrual (1) Total Commercial and industrial $ 188 $ 9,336 $ 9,524 $ 227 $ 16,420 $ 16,647 Agricultural — — — — — — Commercial real estate: Office, retail, and industrial — 2,340 2,340 — 3,600 3,600 Multi-family 160 — 160 163 — 163 Construction — — — — — — Other commercial real estate 198 — 198 170 — 170 Total commercial real estate 358 2,340 2,698 333 3,600 3,933 Total corporate loans 546 11,676 12,222 560 20,020 20,580 Home equity 31 179 210 36 240 276 1-4 family mortgages 624 238 862 637 — 637 Installment — — — — 254 254 Total consumer loans 655 417 1,072 673 494 1,167 Total loans $ 1,201 $ 12,093 $ 13,294 $ 1,233 $ 20,514 $ 21,747 (1) These TDRs are included in non-accrual loans in the preceding tables. TDRs are included in the calculation of the allowance for credit losses in the same manner as non-accrual loans. As of June 30, 2020 and December 31, 2019, there were $2.4 million and $2.2 million of specific allowances, respectively, related to TDRs. There were no material restructurings during the quarters and six months ended June 30, 2020 and 2019. Accruing TDRs that do not perform in accordance with their modified terms are transferred to non-accrual. There were no material TDRs that defaulted within twelve months of the restructure date during the quarters and six months ended June 30, 2020 and 2019. A rollforward of the carrying value of TDRs for the quarters and six months ended June 30, 2020 and 2019 is presented in the following table. TDR Rollforward (Dollar amounts in thousands) Quarters Ended Six Months Ended 2020 2019 2020 2019 Accruing Beginning balance $ 1,216 $ 1,844 $ 1,233 $ 1,866 Additions — — — 12 Net payments (15) (20) (32) (54) Net transfers to non-accrual — (383) — (383) Ending balance 1,201 1,441 1,201 1,441 Non-accrual Beginning balance 17,917 9,375 20,514 6,612 Additions — — 934 — Net (payments) advances (2,595) (1,447) (3,253) 1,474 Charge-offs (3,229) (470) (6,102) (628) Net transfers from accruing — 383 — 383 Ending balance 12,093 7,841 12,093 7,841 Total TDRs $ 13,294 $ 9,282 $ 13,294 $ 9,282 There were $813,000 and $530,000 of commitments to lend additional funds to borrowers with TDRs as of June 30, 2020 and December 31, 2019, respectively.

Lease Obligations

Lease Obligations	6 Months Ended
	Jun. 30, 2020
Leases [Abstract]
Lease Obligations	LEASE OBLIGATIONS The Company has the right to utilize certain premises under non-cancelable operating leases with varying maturity dates through the year ending December 31, 2059. As of June 30, 2020, the weighted-average remaining lease term on these leases was 10.70 years. Various leases contain renewal or termination options controlled by the Company or 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. Variable payments for real estate taxes and other operating expenses are considered to be non-lease components and are excluded from the determination of the lease liability. In addition, the Company leases or subleases certain real estate to third-parties. 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 and a reconciliation of those payments to the Company's lease liability as of June 30, 2020. Lease Liability (Dollar amounts in thousands) As of Year Ending December 31, 2020 $ 9,466 2021 18,785 2022 18,711 2023 18,811 2024 18,530 2025 and thereafter 105,995 Total minimum lease payments 190,298 Discount (1) (28,752) Lease liability (2) $ 161,546 (1) Represents the net present value adjustment related to minimum lease payments. (2) Included in accrued interest payable and other liabilities in the Consolidated Statements of Financial Condition. The discount rate for the Company's operating leases is the rate implicit in the lease and, if that rate cannot be readily determined, the Company's incremental borrowing rate. The weighted-average discount rate on the Company's operating leases was 2.96% as of June 30, 2020. As of June 30, 2020, right-of-use assets of $141.2 million associated with lease liabilities were included in accrued interest receivable and other assets in the Consolidated Statements of Financial Condition. The following table presents net operating lease expense for the quarters and six months ended June 30, 2020 and 2019. Net Operating Lease Expense (Dollar amounts in thousands) Quarters Ended Six Months Ended 2020 2019 2020 2019 Lease expense charged to operations $ 4,839 $ 4,426 $ 9,514 $ 8,486 Rental income from premises leased to others (1) (183) (165) (398) (322) Net operating lease expense $ 4,656 $ 4,261 $ 9,116 $ 8,164 (1) Included as reductions to net occupancy and equipment expense in the Condensed Consolidated Statements of Income. During 2016, the Bank completed a sale-leaseback transaction, whereby the Bank sold to a third-party 55 branches and concurrently entered into triple net lease agreements with certain affiliates of the third-party for each of the branches sold. The sale-leaseback transaction resulted in a pre-tax gain of $88.0 million, net of transaction related expenses, of which $5.5 million was immediately recognized in earnings. Remaining deferred pre-tax gains were $65.5 million as of December 31, 2018. Upon adoption of new lease guidance on January 1, 2019, the remaining after-tax gain of $47.3 million was recognized as a cumulative-effect adjustment to equity in the Consolidated Statements of Financial Condition.

Borrowed Funds

Borrowed Funds	6 Months Ended
	Jun. 30, 2020
Debt Disclosure [Abstract]
Borrowed Funds	BORROWED FUNDS The following table summarizes the Company's borrowed funds by funding source. Summary of Borrowed Funds (Dollar amounts in thousands) As of June 30, December 31, Securities sold under agreements to repurchase $ 130,667 $ 103,515 Federal funds purchased 200,000 160,000 FHLB advances 1,974,528 1,395,243 Total borrowed funds $ 2,305,195 $ 1,658,758 Securities sold under agreements to repurchase are treated as financings and the obligations to repurchase securities sold are included as a liability in the Consolidated Statements of Financial Condition. Repurchase agreements are secured by U.S. treasury and agency securities which are held in third-party pledge accounts if required. The securities underlying the agreements remain in the respective asset accounts. As of June 30, 2020, the Company did not have amounts at risk under repurchase agreements with any individual counterparty or group of counterparties that exceeded 10% of stockholders' equity. The Bank is a member of the FHLB and has access to term financing from the FHLB. These advances are secured by designated assets that may include qualifying commercial real estate, residential and multi-family mortgages, home equity loans, and certain municipal and mortgage-backed securities. As of June 30, 2020, the Company held various short-term FHLB advances with fixed interest rates that range from 0.00% to 1.97% and maturity dates that range from July 1, 2020 to March 4, 2030. The Company hedges interest rates on borrowed funds using interest rate swaps through which the Company receives variable amounts and pays fixed amounts. See Note 12 "Derivative Instruments and Hedging Activities" for a detailed discussion of interest rate swaps. The following table presents short-term credit lines available for use, for which the Company did not have an outstanding balance as of June 30, 2020 and December 31, 2019. Short-Term Credit Lines Available for Use (Dollar amounts in thousands) As of June 30, December 31, FRB's Discount Window Primary Credit Program $ 803,068 $ 874,256 Available federal funds lines 814,000 718,000 Correspondent bank line of credit 50,000 50,000 On September 27, 2016, the Company entered into a loan agreement with U.S. Bank National Association providing for a $50.0 million short-term, unsecured revolving credit facility. On September 26, 2019, the Company entered into a third amendment to this credit facility, which extends the maturity to September 26, 2020. Advances will bear interest at a rate equal to one-month LIBOR plus 1.75%, adjusted on a monthly basis, and the Company must pay an unused facility fee equal to 0.35% per annum on a quarterly basis. Management expects to use this line of credit for general corporate purposes. As of June 30, 2020, no amount was outstanding under the facility. A discussion of terms relevant to senior and subordinated debt is presented in Note 13, "Senior and Subordinated Debt" to the Consolidated Financial Statements in the Company's 2019 10-K.

Material Transactions Affecting

Material Transactions Affecting Stockholders' Equity	3 Months Ended
	Jun. 30, 2020
Equity [Abstract]
Material Transactions Affecting Stockholders' Equity	MATERIAL TRANSACTIONS AFFECTING STOCKHOLDERS' EQUITY Issuance of Common Stock On March 9, 2020, the Company issued 4.9 million shares of its common stock with a market value of $14.58 per share at issuance as part of the consideration in the Park Bank acquisition. Additional information regarding the Park Bank acquisition is presented in Note 3, "Acquisitions". Issuance of Preferred Stock During the second quarter of 2020, the Company issued 4.3 million depositary shares, each representing a 1/40th interest in a share of the Company's 7.000% Fixed Rate Non-Cumulative Perpetual Preferred Stock, Series A, and 4.9 million depositary shares, each representing a 1/40th interest in a share of the Company's Fixed Rate Non-Cumulative Perpetual Preferred Stock, Series C, for an aggregate of $230.5 million. The Company received proceeds of $221.3 million, net of underwriting discounts and commissions and issuance costs and expects to use the proceeds for general corporate purposes. Stock Repurchases On March 19, 2019, the Company announced a stock repurchase program that authorized the Company to repurchase up to $180 million of its common stock from time to time on the open market or in privately negotiated transactions, at the discretion of the Company. On February 26, 2020, the Company announced a new stock repurchase program authorizing the discretionary repurchase of up to $200 million of its outstanding common stock through December 31, 2021. This program replaced the Company's prior $180 million stock repurchase program, which was set to expire in March 2020. The Company suspended repurchases in March as it shifted its capital deployment strategy in response to the pandemic. Prior to the suspension, the Company had repurchased 1.2 million shares of its common stock at a total cost of $22.6 million during the six months ended June 30, 2020.

Earnings Per Common Share

Earnings Per Common Share	6 Months Ended
	Jun. 30, 2020
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 Six Months Ended 2020 2019 2020 2019 Net income $ 19,064 $ 47,014 $ 38,670 $ 93,072 Preferred dividends (1,037) — (1,037) — Net income applicable to unvested restricted shares (187) (389) (379) (792) Net income applicable to common shares $ 17,840 $ 46,625 $ 37,254 $ 92,280 Weighted-average common shares outstanding: Weighted-average common shares outstanding (basic) 113,145 108,467 111,533 107,126 Dilutive effect of common stock equivalents 191 — 339 — Weighted-average diluted common shares outstanding 113,336 108,467 111,872 107,126 Basic EPS $ 0.16 $ 0.43 $ 0.33 $ 0.86 Diluted EPS $ 0.16 $ 0.43 $ 0.33 $ 0.86

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	6 Months Ended
	Jun. 30, 2020
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." Cash Flow Hedges As of June 30, 2020, the Company hedged $430.0 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 $1.6 billion of borrowed funds using 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. Interest rate swaps totaling $1.1 billion began on various dates between December of 2018 and April of 2020 and mature between October of 2021 and March of 2025. The remaining forward starting interest rate swaps totaling $485.0 million begin at various dates between July of 2020 and February of 2021 and mature between July of 2022 and August of 2024. The weighted-average fixed interest rate to be paid on these interest rate swaps that have not yet begun was 1.86% as of June 30, 2020. These derivative contracts are designated as cash flow hedges. Cash Flow Hedges (Dollar amounts in thousands) As of June 30, 2020 December 31, 2019 Gross notional amount outstanding $ 2,035,000 $ 1,905,000 Derivative asset fair value in other assets (1) 6,053 727 Derivative liability fair value in other liabilities (1) 198 (119) Weighted-average interest rate received 0.96 % 1.88 % Weighted-average interest rate paid 0.77 % 1.74 % Weighted-average maturity (in years) 2.30 1.18 (1) Certain cash flow hedges are transacted through a clearinghouse ("centrally cleared") and their change in fair value is settled by the counterparties to the transaction, which results in no fair value. Changes in the fair value of cash flow hedges are recorded in accumulated other comprehensive income (loss) on an after-tax basis and are subsequently reclassified to interest income or expense in the period that the forecasted hedged item impacts earnings. As of June 30, 2020, the Company estimates that $4.3 million will be reclassified from accumulated other comprehensive income (loss) as a decrease 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 June 30, 2020 and December 31, 2019, 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 totaled $694,000 and $5.4 million for the quarter and six months ended June 30, 2020, respectively, and were $2.2 million and $3.4 million for the quarter and six months ended June 30, 2019, respectively. Other Derivative Instruments (Dollar amounts in thousands) As of June 30, 2020 December 31, 2019 Gross notional amount outstanding $ 4,589,018 $ 4,340,384 Derivative asset fair value in other assets (1) 183,938 61,709 Derivative liability fair value in other liabilities (1) (55,026) (18,416) Fair value of derivative (2) 56,025 18,856 (1) Certain other derivative instruments are centrally cleared and their change in fair value is settled by the counterparties to the transaction, which results in no fair value. (2) 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 June 30, 2020 and December 31, 2019. The Company does not enter into derivative transactions for purely speculative purposes. The following table presents the impact of derivative instruments on comprehensive income (loss) and the reclassification of gains (losses) from accumulated other comprehensive income (loss) to net interest income for the quarters and six months ended June 30, 2020 and 2019. Cash Flow Hedge Accounting on AOCI (Dollar amounts in thousands) Quarters Ended Six Months Ended 2020 2019 2020 2019 Gains (losses) recognized in other comprehensive income Interest rate swaps in interest income $ 5,951 $ 5,944 $ 27,955 $ 9,297 Interest rate swaps in interest expense (1,276) (7,816) (13,685) (11,996) Reclassification of gains (losses) included in net income Interest rate swaps in interest income $ 2,624 $ 1,355 $ 3,069 $ 2,748 Interest rate swaps in interest expense — (1,924) — (3,948) The following table presents the impact of derivative instruments on net interest income for the quarters and six months ended June 30, 2020 and 2019. Hedge Income (Dollar amounts in thousands) Quarters Ended Six Months Ended 2020 2019 2020 2019 Cash Flow Hedges Interest rate swaps in interest income $ 2,624 $ 1,355 $ 3,069 $ 2,748 Interest rate swaps in interest expense — (1,924) — (3,948) Total cash flow hedges $ 2,624 $ (569) $ 3,069 $ (1,200) 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 June 30, 2020 and December 31, 2019, these collateral agreements covered 100% of the fair value of the Company's outstanding derivatives. 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 June 30, 2020 and December 31, 2019. Fair Value of Offsetting Derivatives (Dollar amounts in thousands) As of June 30, 2020 As of December 31, 2019 Assets Liabilities Assets Liabilities Gross amounts recognized $ 189,991 $ 54,828 $ 62,436 $ 18,535 Less: amounts offset in the Consolidated Statements of — — — — Net amount presented in the Consolidated Statements of Financial Condition (1) 189,991 54,828 62,436 18,535 Gross amounts not offset in the Consolidated Statements of Offsetting derivative positions (7,495) (7,495) (2,674) (2,674) Cash collateral pledged — (48,430) — (15,861) Net credit exposure $ 182,496 $ (1,097) $ 59,762 $ — (1) Included in other assets or other liabilities in the Consolidated Statements of Financial Condition. As of June 30, 2020 and December 31, 2019, 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 June 30, 2020 and December 31, 2019 the Company was in compliance with these provisions.

Commitments, Guarantees, and Co

Commitments, Guarantees, and Contingent Liabilities	6 Months Ended
	Jun. 30, 2020
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 as well as 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 June 30, 2020 December 31, 2019 Commitments to extend credit: Commercial, industrial, and agricultural $ 2,276,196 $ 1,852,040 Commercial real estate 324,659 296,053 Home equity 578,920 576,956 Other commitments (1) 251,716 251,093 Total commitments to extend credit $ 3,431,491 $ 2,976,142 Letters of credit $ 100,827 $ 103,684 (1) Other commitments includes installment and overdraft protection program commitments. 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 for the full contractual amount. 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 early payment default loans or loans that do not meet underwriting requirements at recorded value. In accordance with the sales agreements, there is no limitation to the maximum potential future payments or expiration of the Company's recourse obligation. There were no material loan repurchases during the quarters and six months ended June 30, 2020 and 2019. Legal Proceedings

Fair Value

Fair Value	6 Months Ended
	Jun. 30, 2020
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 June 30, 2020 As of December 31, 2019 Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Assets Equity securities $ 24,075 $ 14,879 $ — $ 23,703 $ 13,400 $ — Securities available-for-sale U.S. treasury securities 21,199 — — 34,075 — — U.S. agency securities — 643,047 — — 248,424 — CMOs — 1,672,129 — — 1,557,671 — MBSs — 715,140 — — 684,684 — Municipal securities — 239,803 — — 234,431 — Corporate debt securities — 144,544 — — 114,101 — Total securities available-for-sale 21,199 3,414,663 — 34,075 2,839,311 — Mortgage servicing rights ("MSRs") (1) — — 4,464 — — 5,858 Derivative assets (1) — 189,991 — — 62,436 — Liabilities Derivative liabilities (2) $ — $ 54,828 $ — $ — $ 18,535 $ — (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. Equity Securities The Company's equity securities consist primarily of community development investments and certain diversified investment securities held in a grantor trust for participants in the Company's nonqualified deferred compensation plan that are invested in money market and mutual funds. The fair value of certain community development investments is based on quoted prices in active markets or market prices for similar securities obtained from external pricing services or dealer market participants and is classified in level 2 of the fair value hierarchy. As of June 30, 2020, the fair value of certain community development investments totaling $5.0 million was based on the net asset value per share ("NAV") practical expedient and can be redeemed at any month end with 30 days notice. Since these investments are measured at fair value using the NAV practical expedient, they are not classified in the fair value hierarchy. The fair value of the 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 in order to determine whether the valuations represent an exit price in the Company's principal markets. MSRs The Company services loans for others totaling $675.6 million and $653.7 million as of June 30, 2020 and December 31, 2019, respectively. 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 MSRs 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 MSRs as of June 30, 2020 and December 31, 2019. Significant Unobservable Inputs Used in the Valuation of MSRs As of June 30, 2020 December 31, 2019 Prepayment speed 7.6 % - 14.9% 6.7 % - 12.0% Maturity (months) 16 - 88 18 - 94 Discount rate 9.4 % - 12.0% 9.3 % - 12.0% The impact of changes in these key inputs could result in a significantly higher or lower fair value measurement for MSRs. 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 MSRs for the quarters and six months ended June 30, 2020 and 2019 is presented in the following table. Carrying Value of MSRs (Dollar amounts in thousands) Quarters Ended Six Months Ended 2020 2019 2020 2019 Beginning balance $ 4,874 $ 6,228 $ 5,858 $ 6,730 New MSRs 745 204 901 457 Total gains (losses) included in earnings (1) : Changes in valuation inputs and assumptions (750) (389) (1,658) (989) Other changes in fair value (2) (405) (212) (637) (367) Ending balance (3) $ 4,464 $ 5,831 $ 4,464 $ 5,831 Contractual servicing fees earned (1) $ 394 $ 390 $ 797 $ 771 (1) Included in mortgage banking income in the Condensed Consolidated Statements of Income and related to assets held as of June 30, 2020 and 2019. (2) Primarily represents changes in expected future cash flows due to payoffs and paydowns. (3) Included in other assets in the Consolidated Statements of Financial Condition. 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 June 30, 2020 As of December 31, 2019 Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Collateral-dependent non-accrual loans (1) $ — $ — $ 53,608 $ — $ — $ 41,326 OREO (2) — — 530 — — 3,325 Loans held-for-sale (3) — — 45,466 — — 36,032 Assets held-for-sale (4) — — 5,180 — — 6,824 (1) Includes non-accrual loans with charge-offs and non-accrual loans with a specific allowance 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 Non-accrual Loans Certain collateral-dependent non-accrual loans are subject to fair value adjustments to reflect the difference between the carrying value of the loan and the fair value of the underlying collateral. The fair values of collateral-dependent non-accrual 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 non-accrual loans are classified in level 3 of the fair value hierarchy. Collateral-dependent non-accrual 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, all less estimated costs to sell. Given these valuation methods, OREO is classified in level 3 of the fair value hierarchy. Loans Held-for-Sale As of June 30, 2020 and December 31, 2019, loans held-for-sale consists of 1-4 family mortgage loans, which were originated with the intent to sell. These loans were recorded in the held-for-sale category at the contract price and, accordingly, are classified in level 3 of the fair value hierarchy. Assets Held-for-Sale Assets held-for-sale as of June 30, 2020 and December 31, 2019 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 June 30, 2020 December 31, 2019 Fair Value Hierarchy Carrying Fair Value Carrying Fair Value Assets Cash and due from banks 1 $ 304,445 $ 304,445 $ 214,894 $ 214,894 Interest-bearing deposits in other banks 2 637,856 637,856 84,327 84,327 Securities held-to-maturity 2 19,628 19,676 21,997 21,234 FHLB and FRB stock 2 148,512 148,512 115,409 115,409 Loans 3 14,693,606 14,739,129 12,733,200 12,535,848 Investment in BOLI 3 299,649 299,649 296,351 296,351 Accrued interest receivable 3 63,162 63,162 59,716 59,716 Liabilities Deposits 2 $ 15,657,656 $ 15,667,051 $ 13,251,278 $ 13,247,871 Borrowed funds 2 2,305,195 2,305,195 1,658,758 1,658,758 Senior and subordinated debt 2 234,358 266,003 233,948 277,203 Accrued interest payable 2 7,633 7,633 10,502 10,502 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. Loans include the FDIC indemnification asset and net loans, which consists of loans held-for-investment, acquired loans, and the allowance for loan losses. As of both June 30, 2020 and December 31, 2019, the Company estimated the fair value of lending commitments outstanding to be immaterial.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2020
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation – The accompanying unaudited condensed consolidated interim financial statements ("consolidated financial statements") of First Midwest Bancorp, Inc. (the "Company"), a Delaware corporation, were prepared in accordance with the rules and regulations of the Securities and Exchange Commission ("SEC") for quarterly reports on Form 10-Q and reflect all adjustments that management deems necessary for the fair presentation of the financial position and results of operations for the periods presented. The results of operations for the quarter and six months ended June 30, 2020 are not necessarily indicative of the results that may be expected for the year ending December 31, 2020.
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.
Allowance for Securities Held-to-Maturity	Allowance for Securities Held-to-Maturity – The Company maintains an allowance for securities held-to-maturity for the risk of loss inherent in these financial assets, which reflects the difference between the carrying value and the discounted expected future cash flows of these assets and is included in securities held-to-maturity, at amortized cost, net in the Consolidated Statements of Financial Condition.
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 Loans – Acquired loans consist of all loans that were acquired in business combinations, including loans which are covered by Federal Deposit Insurance Corporation ("FDIC") Agreements. Acquired loans are included within loans held-for-investment. Acquired loans are separated into (i) non-purchased credit deteriorated ("non-PCD") loans and (ii) purchased credit deteriorated ("PCD") loans. Non-PCD loans include loans that did not have evidence of more-than-insignificant credit deterioration since origination at the acquisition date. PCD loans include loans that had evidence of more-than-insignificant credit deterioration since origination. 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 PCD loans and are accounted for as non-PCD loans. The acquisition adjustment related to non-PCD loans is amortized into interest income over the contractual life of the related loans. If an acquired non-PCD 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. PCD loans are generally accounted for based on estimates of expected future cash flows. The Company uses a discounted cash flow analysis involving significant unobservable inputs and assumptions to measure the fair value of PCD loans. The significant assumptions utilized in the cash flow analysis include the probability of default ("PD"), loss given default ("LGD"), and discount rate. PCD loans are recorded at fair value, excluding credit-related adjustments, for which an allowance for loan losses is established at the acquisition date through purchase accounting adjustments. 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. Subsequent to the acquisition date, the allowance for loan losses on PCD loans is estimated as are the allowances for all other loans in the portfolio. Prior to the adoption of the current expected credit losses ("CECL") accounting guidance on January 1, 2020, acquired loans were separated into (i) non-purchased credit impaired ("non-PCI") loans and (ii) purchased credit impaired ("PCI") loans. The significant accounting policies related to non-PCI and PCI acquired loans are presented in Note 1, "Summary of Significant Accounting Policies" to the Consolidated Financial Statements in the Company's 2019 10-K.
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. Non-accrual loans with balances under a specified threshold are not individually evaluated for impairment. For all other non-accrual 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 effective interest rate. 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.
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 TDRs when the modification is short-term or results in an insignificant delay in payments. The Company's TDRs 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 TDRs 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.
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 allowance for unfunded commitments and is maintained by management at a level believed adequate to absorb current expected credit losses 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, actual loss experience, consideration of current national, regional, and local economic trends and conditions, reasonable and supportable forecasts about the future, changes in interest rates and property values, various internal and external qualitative factors, 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 allowance for individual loans where the recorded investment exceeds the value, (ii) an allowance based on historical credit loss experience with consideration of reasonable and supportable forecasts of economic conditions for each loan category, and (iii) an allowance based on other internal and external qualitative factors. The allowance for individual loans is based on a periodic analysis of non-accrual loans individually exceeding a specific dollar amount. If the estimated value of a non-accrual loan is less than its recorded book value, the Company either (i) provides an allowance in the amount of the excess of the book value over the estimated value of the related loan or, (ii) if the loss is confirmed, charges off the loss. The allowance by loan category is based on a discounted cash flows analysis as future cash flows are discounted at an effective rate of return. In addition, estimates of losses on future cash flows is forecasted by applying probability of default and loss given default factors as well as prepayment and curtailment assumptions to cash flows that are adjusted to a present value. This discounted cash flow analysis is updated quarterly, primarily using actual loss experience adjusted for current reasonable and supportable forecasts of economic conditions over a one-year forecast period. After the one-year forecast period, a one-year reversion period adjusts loss experience to the historical average on a straight-line basis. These forecasts consider multiple scenarios of key assumptions including national unemployment rates, housing price indices, and gross domestic product. This general allowance 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, regional, 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 includes an allowance on acquired non-PCD and PCD loans. An allowance for loan losses is recorded on acquired PCD loans at the acquisition date through purchase accounting adjustments. Subsequent to the acquisition date, the allowance for loan losses on PCD loans is estimated as are the allowances for all other loans in the portfolio. No allowance for loan losses is recorded on acquired non-PCD loans at the acquisition date through purchase accounting. Instead, an allowance is established on acquired non-PCD loans at the acquisition date in-line with all other loans in the portfolio as if the loans were originated at the acquisition date. On a periodic basis, the adequacy of this allowance is determined using either a PD/LGD methodology or a specific review methodology. Allowance for Unfunded Commitments – The Company also maintains an allowance for unfunded commitments, including letters of credit, for the risk of loss inherent in these arrangements. The allowance for unfunded commitments is estimated using the historical credit loss experience with consideration of reasonable and supportable forecasts of economic conditions for each loan category. The allowance for unfunded commitments is included in other liabilities in the Consolidated Statements of Financial Condition.
Lease Obligations	Lease Obligations – The Company leases certain premises under non-cancelable operating leases in the normal course of business operations. These lease obligations result in the recognition of right-of-use assets and associated lease liabilities. The amount of right-of-use assets and associated lease liabilities recorded is based on the present value of future minimum lease payments. Right-of-use assets are amortized on a straight-line basis over the estimated useful lives of the related premises, and interest associated with the net present value of future minimum lease payments is included in net occupancy and equipment expense in the consolidated financial statements.
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, 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 in the same income statement line item as the earnings effect of the hedged item. 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 income (loss) and is reclassified to earnings when the hedged transaction is reflected in earnings.
Recent Accounting Pronouncements	Adopted Accounting Pronouncements Measurement of Credit Losses on Financial Instruments: In June of 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standard Update ("ASU") 2016-13 that requires 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 are 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. The Company adopted this guidance on January 1, 2020, which resulted in the recognition of $76.0 million of allowance for credit losses which includes $26.0 million attributable to loans, $5.6 million attributable to unfunded commitments, $35.7 million attributable to PCD loans, $8.5 million attributable to non-PCD acquired loans, and $220,000 attributable to securities held-to-maturity. The portion of the allowance for credit losses attributable to PCD loans did not have an impact on equity as the credit-related portion of acquisition adjustments on loans previously classified as PCI transitioned to PCD accounting treatment upon adoption. The amount of allowance for credit losses recognized upon adoption was based on the composition of the loan portfolio, as well as the economic conditions and forecasts as of the adoption date. The Company adopted this guidance using the modified retrospective approach which resulted in the recognition of a $26.8 million after-tax reduction to retained earnings as a cumulative-effect adjustment on January 1, 2020. Prior period amounts continue to be reported in accordance with previously applicable standards and the accounting policies described in the Company's 2019 10-K. The Company has made the following elections upon adoption of ASU 2016-13: • When determining the allowance and net carrying value amount for financial assets in which the repayment is expected to be provided substantially through the operation or sale of the collateral when the borrower is experiencing financial difficulty, the Company will use the fair value of collateral at the reporting date. • The Company writes off uncollectible accrued interest in a timely manner and, therefore, will not measure an allowance for credit losses for accrued interest receivable. • The Company uses a discounted cash flow approach for the majority of its applicable instruments. The change in the present value from one reporting period to the next may result from the passage of time, in addition to changes in estimates of the timing of the cash flows. The Company will report the entire change in the present value as provision for loan losses (or reversal of provision for loan losses) versus reporting the change related to the passage of time as interest income. For additional discussion of the allowance for credit losses, see Note 7 "Past Due Loans, Allowance for Credit Losses, Non-Accrual Loans, and TDRs." Accounting for Goodwill Impairment: In January of 2017, the FASB issued ASU 2017-04 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. The adoption of this guidance on January 1, 2020 did not materially impact the Company's financial condition, results of operations, or liquidity. Changes to the Disclosure Requirements for Fair Value Measurement: In August of 2018, the FASB issued ASU 2018-13 that eliminates, modifies, and adds to certain fair value measurement disclosure requirements associated with the three-tiered fair value hierarchy. This guidance is effective for annual and interim periods beginning after December 15, 2019. The adoption of this guidance on January 1, 2020 did not materially impact the Company's financial condition, results of operations, or liquidity. Loan Modifications Due to COVID-19: In March of 2020, the CARES Act was enacted by the U.S. government in response to the economic disruption caused by the COVID-19 pandemic (the "pandemic"). The Company's banking regulators issued a statement titled the "Interagency Statement on Loan Modifications by Financial Institutions Working with Customers Affected by the Coronavirus" that encourages financial institutions to work prudently with borrowers who are or may be unable to meet their contractual payment obligations due to the effects of the pandemic. Additionally, the CARES Act provides that a qualified loan modification is exempt by law from classification as a TDR as defined by GAAP, from the period beginning March 1, 2020 until the earlier of December 31, 2020 or the date that is 60 days after the date on which the national emergency concerning the pandemic declared by the President of the United States terminates. Accordingly, the Company is offering short-term modifications made in response to the pandemic to borrowers who are current and otherwise not past due. These include short-term modifications in the form of payment deferrals, fee waivers, extensions of repayment terms, or other delays in payment that are insignificant. The total balance of loans with eligible modifications as of June 30, 2020 was $1.9 billion. Regulatory Capital Delay of CECL Impact: In February of 2019, the federal bank regulatory agencies issued a final rule, the 2019 CECL Rule, that revised certain capital regulations to account for changes to credit loss accounting under U.S. GAAP. The 2019 CECL Rule included a transition option that allows banking organizations to phase in, over a three-year period, the day-one adverse effects of CECL on their regulatory capital ratios (three-year transition option). In March of 2020, the federal bank regulatory agencies issued an interim final rule that maintains the three year transition option of the 2019 CECL Rule and also provides banking organizations that were required under GAAP (as of January 2020) to implement CECL before the end of 2020 the option to delay for two years an estimate of the effect of CECL on regulatory capital, relative to the incurred loss methodology's effect on regulatory capital, followed by a three-year transition period (five-year transition option). The Company elected to adopt the five-year transition option. This election of the transition option is applicable only to regulatory capital computations under federal banking regulations and does not otherwise impact the financial statements prepared in accordance with GAAP. Accounting Pronouncements Pending Adoption Changes to the Disclosure Requirements for Defined Benefit Plans: In August of 2018, the FASB issued ASU 2018-14 that makes minor changes and clarifications to the disclosure requirements for entities that sponsor defined benefit plans. This guidance is effective for annual and interim periods beginning after December 15, 2020. 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. Income Taxes : In December of 2019, the FASB issued ASU 2019-12 that removes certain exceptions to the general principles of accounting for income taxes. This guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. 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. Reference Rate Reform : In March of 2020, the FASB issued ASU 2020-04 that provides optional expedients and exceptions for applying GAAP to contracts and other transactions affected by reference rate reform, if certain criteria are met. This guidance is effective as of March 12, 2020 through December 31, 2022. Management is in the process of determining the impact on the Company's financial condition, results of operations, and liquidity.

Acquisitions (Tables)

Acquisitions (Tables)	6 Months Ended
	Jun. 30, 2020
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 Park Bank and Bridgeview 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 (Dollar amounts in thousands, except share and per share data) Park Bank Bridgeview March 9, 2020 May 9, 2019 Assets Cash and due from banks and interest-bearing deposits in other banks $ 244,781 $ 35,097 Equity securities — 6,966 Securities available-for-sale 136,856 263,090 Securities held-to-maturity 300 13,426 FHLB and FRB stock — 1,481 Loans 685,451 709,438 OREO 2,001 5,436 Goodwill 62,433 63,231 Other intangible assets 3,068 15,603 Premises, furniture, and equipment 2,550 16,138 Accrued interest receivable and other assets 13,796 35,909 Total assets $ 1,151,236 $ 1,165,815 Liabilities Noninterest-bearing deposits $ 356,050 $ 179,267 Interest-bearing deposits 594,026 807,487 Total deposits 950,076 986,754 Borrowed funds 11,532 1,746 Senior and subordinated debt — 29,360 Accrued interest payable and other liabilities 15,246 12,603 Total liabilities 976,854 1,030,463 Consideration Paid Common stock (2020 – 4,930,231, shares issued at $14.58 per share, 2019 – 4,728,541, shares issued at $20.77 per share), net of issuance costs 71,883 98,212 Cash paid 102,499 37,140 Total consideration paid 174,382 135,352 $ 1,151,236 $ 1,165,815

Securities (Tables)

Securities (Tables)	6 Months Ended
	Jun. 30, 2020
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 June 30, 2020 As of December 31, 2019 Amortized Cost Gross Unrealized Fair Amortized Cost Gross Unrealized Fair Gains Losses Gains Losses Securities Available-for-Sale U.S. treasury securities $ 20,992 $ 207 $ — $ 21,199 $ 33,939 $ 137 $ (1) $ 34,075 U.S. agency securities 640,253 4,166 (1,372) 643,047 249,502 758 (1,836) 248,424 Collateralized mortgage obligations 1,624,609 49,059 (1,539) 1,672,129 1,547,805 14,893 (5,027) 1,557,671 Other mortgage-backed securities 695,218 20,159 (237) 715,140 678,804 7,728 (1,848) 684,684 Municipal securities 229,414 10,410 (21) 239,803 228,632 5,898 (99) 234,431 Corporate debt securities 143,639 2,367 (1,462) 144,544 112,797 1,791 (487) 114,101 Total securities available-for-sale $ 3,354,125 $ 86,368 $ (4,631) $ 3,435,862 $ 2,851,479 $ 31,205 $ (9,298) $ 2,873,386 Securities Held-to-Maturity Municipal securities $ 19,848 $ 48 $ — $ 19,896 $ 21,997 $ — $ (763) $ 21,234 Allowance for securities held-to- maturity (1) (220) $ (220) Total securities held-to-maturity, $ 19,628 $ 48 $ — $ 19,676 Equity Securities $ 43,954 $ 42,136 (1) The allowance for securities held-to-maturity was established upon adoption of CECL on January 1, 2020.
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 June 30, 2020 As of December 31, 2019 Amortized Cost Gross Unrealized Fair Amortized Cost Gross Unrealized Fair Gains Losses Gains Losses Securities Available-for-Sale U.S. treasury securities $ 20,992 $ 207 $ — $ 21,199 $ 33,939 $ 137 $ (1) $ 34,075 U.S. agency securities 640,253 4,166 (1,372) 643,047 249,502 758 (1,836) 248,424 Collateralized mortgage obligations 1,624,609 49,059 (1,539) 1,672,129 1,547,805 14,893 (5,027) 1,557,671 Other mortgage-backed securities 695,218 20,159 (237) 715,140 678,804 7,728 (1,848) 684,684 Municipal securities 229,414 10,410 (21) 239,803 228,632 5,898 (99) 234,431 Corporate debt securities 143,639 2,367 (1,462) 144,544 112,797 1,791 (487) 114,101 Total securities available-for-sale $ 3,354,125 $ 86,368 $ (4,631) $ 3,435,862 $ 2,851,479 $ 31,205 $ (9,298) $ 2,873,386 Securities Held-to-Maturity Municipal securities $ 19,848 $ 48 $ — $ 19,896 $ 21,997 $ — $ (763) $ 21,234 Allowance for securities held-to- maturity (1) (220) $ (220) Total securities held-to-maturity, $ 19,628 $ 48 $ — $ 19,676 Equity Securities $ 43,954 $ 42,136 (1) The allowance for securities held-to-maturity was established upon adoption of CECL on January 1, 2020.
Equity 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 June 30, 2020 As of December 31, 2019 Amortized Cost Gross Unrealized Fair Amortized Cost Gross Unrealized Fair Gains Losses Gains Losses Securities Available-for-Sale U.S. treasury securities $ 20,992 $ 207 $ — $ 21,199 $ 33,939 $ 137 $ (1) $ 34,075 U.S. agency securities 640,253 4,166 (1,372) 643,047 249,502 758 (1,836) 248,424 Collateralized mortgage obligations 1,624,609 49,059 (1,539) 1,672,129 1,547,805 14,893 (5,027) 1,557,671 Other mortgage-backed securities 695,218 20,159 (237) 715,140 678,804 7,728 (1,848) 684,684 Municipal securities 229,414 10,410 (21) 239,803 228,632 5,898 (99) 234,431 Corporate debt securities 143,639 2,367 (1,462) 144,544 112,797 1,791 (487) 114,101 Total securities available-for-sale $ 3,354,125 $ 86,368 $ (4,631) $ 3,435,862 $ 2,851,479 $ 31,205 $ (9,298) $ 2,873,386 Securities Held-to-Maturity Municipal securities $ 19,848 $ 48 $ — $ 19,896 $ 21,997 $ — $ (763) $ 21,234 Allowance for securities held-to- maturity (1) (220) $ (220) Total securities held-to-maturity, $ 19,628 $ 48 $ — $ 19,676 Equity Securities $ 43,954 $ 42,136 (1) The allowance for securities held-to-maturity was established upon adoption of CECL on January 1, 2020.
Remaining Contractual Maturity of Securities	Remaining Contractual Maturity of Securities (Dollar amounts in thousands) As of June 30, 2020 Available-for-Sale Held-to-Maturity Amortized Fair Amortized Fair One year or less $ 270,623 $ 274,363 $ 8,070 $ 8,089 After one year to five years 185,159 187,718 5,452 5,465 After five years to ten years 578,516 586,512 3,315 3,323 After ten years — — 2,791 2,799 Securities that do not have a single contractual maturity date 2,319,827 2,387,269 — — Total $ 3,354,125 $ 3,435,862 $ 19,628 $ 19,676
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 June 30, 2020 and December 31, 2019. Securities in an Unrealized Loss Position (Dollar amounts in thousands) Less Than 12 Months 12 Months or Longer Total Number of Fair Unrealized Fair Unrealized Fair Unrealized As of June 30, 2020 Securities Available-for-Sale U.S. agency securities 23 $ 73,659 $ 1,149 $ 13,927 $ 223 $ 87,586 $ 1,372 CMOs 41 139,578 1,379 33,967 160 173,545 1,539 MBSs 14 64,778 223 3,805 14 68,583 237 Municipal securities 1 1,745 21 — — 1,745 21 Corporate debt securities 11 39,949 154 38,199 1,308 78,148 1,462 Total 90 $ 319,709 $ 2,926 $ 89,898 $ 1,705 $ 409,607 $ 4,631 As of December 31, 2019 Securities Available-for-Sale U.S. treasury securities 5 $ 4,966 $ 1 $ — $ — $ 4,966 $ 1 U.S. agency securities 52 97,729 1,200 49,387 636 147,116 1,836 CMOs 148 187,470 2,177 412,083 2,850 599,553 5,027 MBSs 59 66,340 996 121,861 852 188,201 1,848 Municipal securities 16 9,384 89 3,104 10 12,488 99 Corporate debt securities 6 9,719 281 21,955 206 31,674 487 Total 286 $ 375,608 $ 4,744 $ 608,390 $ 4,554 $ 983,998 $ 9,298

Loans (Tables)

Loans (Tables)	6 Months Ended
	Jun. 30, 2020
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 June 30, December 31, Commercial and industrial $ 4,789,556 $ 4,481,525 Agricultural 381,124 405,616 Commercial real estate: Office, retail, and industrial 2,020,318 1,848,718 Multi-family 874,861 856,553 Construction 687,063 593,093 Other commercial real estate 1,475,937 1,383,708 Total commercial real estate 5,058,179 4,682,072 Total corporate loans, excluding Paycheck Protection Program ("PPP") loans 10,228,859 9,569,213 PPP loans 1,179,403 — Total corporate loans 11,408,262 9,569,213 Home equity 892,867 851,454 1-4 family mortgages 2,175,322 1,927,078 Installment 457,207 492,585 Total consumer loans 3,525,396 3,271,117 Total loans $ 14,933,658 $ 12,840,330 Deferred loan fees included in total loans $ 9,691 $ 7,972 Overdrawn demand deposits included in total loans 7,676 10,675
Loan Sales and Purchases	The following table presents loan sales and purchases for the quarters and six months ended June 30, 2020 and 2019. Loan Sales and Purchases (Dollar amounts in thousands) Quarters Ended Six Months Ended 2020 2019 2020 2019 Corporate loan sales Proceeds from sales $ 295 $ 2,178 $ 4,598 $ 5,376 Less book value of loans sold 289 2,132 4,477 5,248 Net gains on corporate loan sales (1) 6 46 121 128 1-4 family mortgage loan sales Proceeds from sales 173,251 95,408 292,410 154,191 Less book value of loans sold 168,656 93,473 285,301 150,928 Net gains on 1-4 family mortgage loan sales (2) 4,595 1,935 7,109 3,263 Total net gains on loan sales $ 4,601 $ 1,981 $ 7,230 $ 3,391 Corporate loan purchases (3) Commercial and industrial $ 22,894 $ 128,891 $ 168,716 $ 181,610 Office, retail, and industrial — 1,711 — 1,711 Construction 3,258 1,432 3,897 2,266 Other commercial real estate 10,000 — 10,000 3,986 Total corporate loan purchases $ 36,152 $ 132,034 $ 182,613 $ 189,573 Consumer loan purchases Home equity $ — $ 39,159 $ 144,967 $ 77,411 1-4 family mortgages 179,410 231,533 249,585 304,463 Total consumer loan purchases $ 179,410 $ 270,692 $ 394,552 $ 381,874 (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. (3) Consists of the Company's portion of loan participations purchased.

Acquired Loans (Tables)

Acquired Loans (Tables)	6 Months Ended
	Jun. 30, 2020
Transfers and Servicing [Abstract]
Schedule of Acquired Loans	The following table presents the carrying amount of acquired loans as of June 30, 2020 and December 31, 2019. Acquired Loans (1)(2) (Dollar amounts in thousands) As of June 30, 2020 As of December 31, 2019 PCD Non-PCD Total PCI Non-PCI Total Acquired loans $ 243,207 $ 1,516,157 $ 1,759,364 $ 167,183 $ 1,216,133 $ 1,383,316 (1) Included in loans in the Consolidated Statements of Financial Condition. (2) Prior to the adoption of CECL on January 1, 2020, 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 were classified as PCI.

Past Due Loans, Allowance For_2

Past Due Loans, Allowance For Credit Losses, Non-Accrual Loans, and TDRS (Tables)	6 Months Ended
	Jun. 30, 2020
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 June 30, 2020 and December 31, 2019 with balances presented on an amortized cost basis. 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 (1) (Dollar amounts in thousands) Aging Analysis (Accruing and Non-accrual) Non-performing Loans Current 30-89 Days 90 Days or Total Total Non- 90 Days or More Past Due, Still Accruing Interest As of June 30, 2020 Commercial and industrial $ 4,750,932 $ 20,550 $ 18,074 $ 38,624 $ 4,789,556 $ 28,349 $ 1,090 Agricultural 373,910 — 7,214 7,214 381,124 8,494 — Commercial real estate: Office, retail, and industrial 1,982,798 4,973 32,547 37,520 2,020,318 35,915 596 Multi-family 870,430 1,538 2,893 4,431 874,861 3,121 — Construction 658,892 801 27,370 28,171 687,063 27,282 88 Other commercial real estate 1,458,874 5,145 11,918 17,063 1,475,937 18,372 25 Total commercial real estate 4,970,994 12,457 74,728 87,185 5,058,179 84,690 709 Total corporate loans, 10,095,836 33,007 100,016 133,023 10,228,859 121,533 1,799 PPP loans 1,179,403 — — — 1,179,403 — — Total corporate loans 11,275,239 33,007 100,016 133,023 11,408,262 121,533 1,799 Home equity 885,678 2,641 4,548 7,189 892,867 9,129 187 1-4 family mortgages 2,164,611 4,928 5,783 10,711 2,175,322 8,498 — Installment 454,996 956 1,255 2,211 457,207 — 1,255 Total consumer loans 3,505,285 8,525 11,586 20,111 3,525,396 17,627 1,442 Total loans $ 14,780,524 $ 41,532 $ 111,602 $ 153,134 $ 14,933,658 $ 139,160 $ 3,241 As of December 31, 2019 Commercial and industrial $ 4,455,381 $ 11,468 $ 14,676 $ 26,144 $ 4,481,525 $ 29,995 $ 2,207 Agricultural 398,676 850 6,090 6,940 405,616 5,954 358 Commercial real estate: Office, retail, and industrial 1,830,321 2,943 15,454 18,397 1,848,718 25,857 546 Multi-family 853,762 211 2,580 2,791 856,553 2,697 — Construction 588,065 4,876 152 5,028 593,093 152 — Other commercial real estate 1,377,678 3,233 2,797 6,030 1,383,708 4,729 529 Total commercial real estate 4,649,826 11,263 20,983 32,246 4,682,072 33,435 1,075 Total corporate loans 9,503,883 23,581 41,749 65,330 9,569,213 69,384 3,640 Home equity 841,908 4,992 4,554 9,546 851,454 8,443 146 1-4 family mortgages 1,917,648 5,452 3,978 9,430 1,927,078 4,442 1,203 Installment 491,406 1,167 12 1,179 492,585 — 12 Total consumer loans 3,250,962 11,611 8,544 20,155 3,271,117 12,885 1,361 Total loans $ 12,754,845 $ 35,192 $ 50,293 $ 85,485 $ 12,840,330 $ 82,269 $ 5,001 (1) Prior to the adoption of CECL on January 1, 2020, purchased credit impaired ("PCI") loans with an accretable yield were considered current and were not included in past due loan totals. In addition, PCI loans with an accretable yield were excluded from non-accrual loans. Subsequent to adoption, PCD loans, including those previously classified as PCI, are included in past due and non-accrual loan totals. In addition, an allowance for credit losses is established as of the acquisition date or upon the adoption of CECL for loans previously classified as PCI, as PCD loans are no longer recorded net of a credit-related acquisition adjustment.
Allowance for Credit Losses on Financing Receivables	A rollforward of the allowance for credit losses by portfolio segment for the quarters and six months ended June 30, 2020 and 2019 is presented in the table below. PPP loans are excluded from this table as there is no allowance for credit losses associated with these loans due to guarantees. Allowance for Credit Losses by Portfolio Segment (Dollar amounts in thousands) Commercial, Office, Multi- Construction Other Consumer Allowance for Total Quarter Ended June 30, 2020 Beginning balance $ 113,733 $ 25,856 $ 3,689 $ 11,297 $ 18,554 $ 46,819 $ 6,753 $ 226,701 Allowance established 378 — — — — — 872 1,250 Charge-offs (5,673) (3,092) (9) (798) (31) (4,631) — (14,234) Recoveries 820 6 — — 12 473 — 1,311 Net charge-offs (4,853) (3,086) (9) (798) (19) (4,158) — (12,923) Provision for loan 14,719 1,671 1,631 1,023 3,327 10,278 — 32,649 Ending balance $ 123,977 $ 24,441 $ 5,311 $ 11,522 $ 21,862 $ 52,939 $ 7,625 $ 247,677 Quarter Ended June 30, 2019 Beginning balance $ 64,685 $ 7,679 $ 2,216 $ 2,131 $ 4,930 $ 21,938 $ 1,200 $ 104,779 Charge-offs (6,516) (1,605) — — (329) (2,974) — (11,424) Recoveries 1,258 151 — 10 45 619 — 2,083 Net charge-offs (5,258) (1,454) — 10 (284) (2,355) — (9,341) Provision for loan 6,937 1,270 (57) (279) 351 3,269 — 11,491 Ending balance $ 66,364 $ 7,495 $ 2,159 $ 1,862 $ 4,997 $ 22,852 $ 1,200 $ 106,929 Six Months Ended June 30, 2020 Beginning balance $ 62,830 $ 7,580 $ 2,950 $ 1,697 $ 6,408 $ 26,557 $ 1,200 $ 109,222 Adjustment to apply recent accounting pronouncements (1) 20,159 11,686 397 10,300 11,427 16,235 5,553 75,757 Allowance established 12,640 2,003 — — — 39 872 15,554 Charge-offs (12,739) (3,430) (19) (2,606) (339) (9,031) — (28,164) Recoveries 1,979 15 5 — 156 972 — 3,127 Net charge-offs (10,760) (3,415) (14) (2,606) (183) (8,059) — (25,037) Provision for loan 39,108 6,587 1,978 2,131 4,210 18,167 — 72,181 Ending balance $ 123,977 $ 24,441 $ 5,311 $ 11,522 $ 21,862 $ 52,939 $ 7,625 $ 247,677 Six Months Ended June 30, 2019 Beginning balance $ 63,276 $ 7,900 $ 2,464 $ 2,173 $ 4,934 $ 21,472 $ 1,200 $ 103,419 Charge-offs (12,967) (2,233) (340) (6) (539) (6,116) — (22,201) Recoveries 2,559 161 1 16 66 973 — 3,776 Net charge-offs (10,408) (2,072) (339) 10 (473) (5,143) — (18,425) Provision for loan 13,496 1,667 34 (321) 536 6,523 — 21,935 Ending balance $ 66,364 $ 7,495 $ 2,159 $ 1,862 $ 4,997 $ 22,852 $ 1,200 $ 106,929 (1) As a result of accounting guidance adopted in the first quarter of 2020, the increase in allowance for credit losses, net of tax, was recognized as a cumulative-effect adjustment to retained earnings as of January 1, 2020. For further discussion of this guidance, see Note 2, "Recent Accounting Pronouncements and Other Guidance."
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 June 30, 2020 and December 31, 2019. Loans and Related Allowance for Credit Losses by Portfolio Segment (Dollar amounts in thousands) Loans Allowance for Credit Losses Individually Collectively PCD/PCI (1) Total Individually Collectively PCD/PCI (1) Total As of June 30, 2020 Commercial, industrial, $ 25,190 $ 5,049,876 $ 95,614 $ 5,170,680 $ 4,805 $ 102,735 $ 16,437 $ 123,977 Commercial real estate: Office, retail, and industrial 25,165 1,956,597 38,556 2,020,318 885 14,964 8,592 24,441 Multi-family 1,785 871,545 1,531 874,861 — 5,126 185 5,311 Construction 18,611 646,355 22,097 687,063 — 4,624 6,898 11,522 Other commercial real estate 3,806 1,410,080 62,051 1,475,937 44 10,332 11,486 21,862 Total commercial real estate 49,367 4,884,577 124,235 5,058,179 929 35,046 27,161 63,136 Total corporate loans, 74,557 9,934,453 219,849 10,228,859 5,734 137,781 43,598 187,113 PPP loans — 1,179,403 — 1,179,403 — — — — Total corporate loans 74,557 11,113,856 219,849 11,408,262 5,734 137,781 43,598 187,113 Consumer 23 3,502,015 23,358 3,525,396 — 52,103 836 52,939 Allowance for unfunded — — — — — 7,625 — 7,625 Total loans $ 74,580 $ 14,615,871 $ 243,207 $ 14,933,658 $ 5,734 $ 197,509 $ 44,434 $ 247,677 As of December 31, 2019 Commercial, industrial, and $ 34,142 $ 4,807,114 $ 45,885 $ 4,887,141 $ 3,414 $ 59,108 $ 308 $ 62,830 Commercial real estate: Office, retail, and industrial 24,820 1,795,557 28,341 1,848,718 578 6,899 103 7,580 Multi-family 1,995 851,857 2,701 856,553 — 2,854 96 2,950 Construction 123 581,747 11,223 593,093 — 1,681 16 1,697 Other commercial real estate 3,241 1,323,635 56,832 1,383,708 — 4,867 1,541 6,408 Total commercial real estate 30,179 4,552,796 99,097 4,682,072 578 16,301 1,756 18,635 Total corporate loans 64,321 9,359,910 144,982 9,569,213 3,992 75,409 2,064 81,465 Consumer — 3,248,916 22,201 3,271,117 — 25,424 1,133 26,557 Allowance for unfunded — — — — — 1,200 — 1,200 Total loans $ 64,321 $ 12,608,826 $ 167,183 $ 12,840,330 $ 3,992 $ 102,033 $ 3,197 $ 109,222 (1) Prior to the adoption of CECL on January 1, 2020, 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 were classified as PCI.
Impaired Financing Receivables	The following table presents collateral-dependent loans, including PCD loans, without regard to accrual status by primary collateral type and non-accrual loans with no related allowance as of June 30, 2020. PPP loans are excluded from this table as there is no allowance for credit losses associated with these loans due to guarantees. Collateral-dependent Loans and Non-accrual Loans With No Related Allowance by Class (Dollar amounts in thousands) Type of Collateral Non-accrual Loans Real Blanket Equipment Commercial and industrial $ 6,870 $ 45,235 $ 3,169 $ 6,338 Agricultural 3,417 4,719 — 4,485 Commercial real estate: Office, retail, and industrial 44,538 — — 17,293 Multi-family 2,606 — — 1,785 Construction 28,779 — — 19,043 Other commercial real estate 33,845 — — 11,789 Total commercial real estate 109,768 — — 49,910 Total corporate loans 120,055 49,954 3,169 60,733 Home equity 244 — — 123 1-4 family mortgages 2,665 — — 527 Installment — — — — Total consumer loans 2,909 — — 650 Total loans $ 122,964 $ 49,954 $ 3,169 $ 61,383 Loans Individually Evaluated The following table presents loans individually evaluated by class of loan as of June 30, 2020 and December 31, 2019. PCD and PCI loans are excluded from this disclosure. Loans Individually Evaluated by Class (Dollar amounts in thousands) As of June 30, 2020 As of December 31, 2019 Recorded Investment In Recorded Investment In Loans with Loans with Unpaid Specific Loans with Loans with Unpaid Specific Commercial and industrial $ 4,884 $ 12,170 $ 37,153 $ 3,018 $ 12,885 $ 15,516 $ 52,559 $ 2,456 Agricultural 4,485 3,651 13,032 1,787 1,889 3,852 9,293 958 Commercial real estate: Office, retail, and industrial 15,839 9,326 28,730 885 14,111 10,709 37,007 578 Multi-family 1,785 — 1,785 — 1,995 — 1,995 — Construction 18,611 — 18,611 — 123 — 123 — Other commercial real estate 3,357 449 4,103 44 3,241 — 3,495 — Total commercial real estate 39,592 9,775 53,229 929 19,470 10,709 42,620 578 Total corporate loans 48,961 25,596 103,414 5,734 34,244 30,077 104,472 3,992 Consumer 23 — 23 — — — — — Total non-accrual loans $ 48,984 $ 25,596 $ 103,437 $ 5,734 $ 34,244 $ 30,077 $ 104,472 $ 3,992
Financing Receivable Credit Quality Indicators	The following tables present credit quality indicators for corporate and consumer loans on an amortized cost basis as of June 30, 2020 and net loan charge-offs for the six months ended June 30, 2020. PPP loans are excluded from this table as there is no allowance for credit losses associated with these loans due to guarantees. Corporate Loan Portfolio by Origination Year (Dollar amounts in thousands) 2020 (1) 2019 2018 2017 2016 Prior Revolving Loans Total Commercial, industrial, agricultural: Pass $ 461,644 $ 887,292 $ 924,776 $ 519,875 $ 238,751 $ 469,442 $ 1,364,316 $ 4,866,096 Special Mention (2) 3,508 6,520 31,435 4,676 8,527 17,568 80,597 152,831 Substandard (3) 384 4,376 26,729 17,862 16,583 15,804 33,172 114,910 Non-accrual (4) — 1,771 2,381 8,505 4,806 6,682 12,698 36,843 Total commercial, $ 465,536 $ 899,959 $ 985,321 $ 550,918 $ 268,667 $ 509,496 $ 1,490,783 $ 5,170,680 Commercial, industrial, $ — $ 250 $ 946 $ 1,058 $ 617 $ 1,853 $ 6,036 $ 10,760 Office, retail, and industrial: Pass $ 95,291 $ 266,479 $ 225,938 $ 348,121 $ 302,430 $ 677,880 $ 5,491 $ 1,921,630 Special Mention (2) 1,173 655 3,280 5,091 15,439 12,914 — 38,552 Substandard (3) — — — 337 1,514 22,370 — 24,221 Non-accrual (4) — — 132 — 10,238 25,545 — 35,915 Total office, retail, $ 96,464 $ 267,134 $ 229,350 $ 353,549 $ 329,621 $ 738,709 $ 5,491 $ 2,020,318 Office, retail, and $ — $ 333 $ 156 $ — $ 1,628 $ 1,298 $ — $ 3,415 Multi-family: Pass $ 125,328 $ 174,802 $ 84,791 $ 101,492 $ 101,846 $ 239,713 $ 36,111 $ 864,083 Special Mention (2) — — — — 358 1,416 — 1,774 Substandard (3) — — 387 81 — 5,415 — 5,883 Non-accrual (4) — — — 1,785 237 1,099 — 3,121 Total multi-family $ 125,328 $ 174,802 $ 85,178 $ 103,358 $ 102,441 $ 247,643 $ 36,111 $ 874,861 Multi-family net loan $ — $ 3 $ — $ 1 $ — $ 10 $ — $ 14 Construction: Pass $ 33,890 $ 151,849 $ 171,480 $ 101,781 $ 71,001 $ 70,950 $ 33,016 $ 633,967 Special Mention (2) — — 45 3,032 14,221 1,228 — 18,526 Substandard (3) — — — — — 7,288 — 7,288 Non-accrual (4) — — — — — 25,591 1,691 27,282 Total construction $ 33,890 $ 151,849 $ 171,525 $ 104,813 $ 85,222 $ 105,057 $ 34,707 $ 687,063 Construction net loan $ — $ 118 $ — $ 798 $ — $ 1,690 $ — $ 2,606 Other commercial real estate: Pass $ 61,056 $ 195,768 $ 269,526 $ 226,064 $ 125,249 $ 466,436 $ 27,553 $ 1,371,652 Special Mention (2) — 3,532 7,589 6,887 11,219 15,463 — 44,690 Substandard (3) — — — 1,400 4,224 35,599 — 41,223 Non-accrual (4) — — 674 4,150 1,078 12,377 93 18,372 Total other $ 61,056 $ 199,300 $ 277,789 $ 238,501 $ 141,770 $ 529,875 $ 27,646 $ 1,475,937 Other commercial real $ — $ 38 $ 1 $ — $ 183 $ (39) $ — $ 183 (1) Represents year-to-date loans originated during 2020. (2) 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. (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. Consumer Loan Portfolio by Origination Year (Dollar amounts in thousands) 2020 (1) 2019 2018 2017 2016 Prior Revolving Loans Total Home equity: Performing $ 8,231 $ 48,696 $ 27,783 $ 13,809 $ 11,878 $ 57,053 $ 716,288 $ 883,738 Non-accrual — 22 125 264 482 6,801 1,435 9,129 Total home equity $ 8,231 $ 48,718 $ 27,908 $ 14,073 $ 12,360 $ 63,854 $ 717,723 $ 892,867 Home equity net $ — $ — $ 1 $ — $ 1 $ 42 $ (14) $ 30 1-4 family mortgages: Performing $ 597,506 $ 676,898 $ 311,884 $ 158,230 $ 181,912 $ 240,394 $ — $ 2,166,824 Non-accrual — — 438 83 63 7,914 — 8,498 Total 1-4 family $ 597,506 $ 676,898 $ 312,322 $ 158,313 $ 181,975 $ 248,308 $ — $ 2,175,322 1-4 family mortgages $ — $ — $ 4 $ — $ 7 $ 735 $ — $ 746 Installment: Performing $ 59,971 $ 185,919 $ 107,220 $ 45,108 $ 17,563 $ 20,662 $ 20,764 $ 457,207 Non-accrual — — — — — — — — Total installment $ 59,971 $ 185,919 $ 107,220 $ 45,108 $ 17,563 $ 20,662 $ 20,764 $ 457,207 Installment net loan $ 44 $ 3,757 $ 2,200 $ 775 $ 85 $ 393 $ 29 $ 7,283 (1) Represents year-to-date loans originated during 2020. During the quarter and six months ended June 30, 2020, $16.8 million and $23.8 million, respectively, of revolving loans converted to term loans. The following tables present credit quality indicators by class for corporate and consumer loans on an amortized cost basis as of December 31, 2019. Corporate Credit Quality Indicators by Class (Dollar amounts in thousands) Pass Special Mention (1) Substandard (2) Non-accrual (3) Total As of December 31, 2019 Commercial and industrial $ 4,324,709 $ 47,665 $ 79,156 $ 29,995 $ 4,481,525 Agricultural 350,827 32,764 16,071 5,954 405,616 Commercial real estate: Office, retail, and industrial 1,747,287 42,230 33,344 25,857 1,848,718 Multi-family 839,615 8,279 5,962 2,697 856,553 Construction 564,495 17,977 10,469 152 593,093 Other commercial real estate 1,295,155 39,788 44,036 4,729 1,383,708 Total commercial real estate 4,446,552 108,274 93,811 33,435 4,682,072 Total corporate loans $ 9,122,088 $ 188,703 $ 189,038 $ 69,384 $ 9,569,213 (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 a well-defined weakness 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 a well-defined weakness that may jeopardize the liquidation of the debt or result in a loss if the deficiencies are not corrected. Consumer Credit Quality Indicators by Class (Dollar amounts in thousands) Performing Non-accrual Total As of December 31, 2019 Home equity $ 843,011 $ 8,443 $ 851,454 1-4 family mortgages 1,922,636 4,442 1,927,078 Installment 492,585 — 492,585 Total consumer loans $ 3,258,232 $ 12,885 $ 3,271,117
Troubled Debt Restructuring Activity Rollforward	The table below presents TDRs by class as of June 30, 2020 and December 31, 2019. See Note 1, "Summary of Significant Accounting Policies," for the accounting policy for TDRs. TDRs by Class (Dollar amounts in thousands) As of June 30, 2020 As of December 31, 2019 Accruing Non-accrual (1) Total Accruing Non-accrual (1) Total Commercial and industrial $ 188 $ 9,336 $ 9,524 $ 227 $ 16,420 $ 16,647 Agricultural — — — — — — Commercial real estate: Office, retail, and industrial — 2,340 2,340 — 3,600 3,600 Multi-family 160 — 160 163 — 163 Construction — — — — — — Other commercial real estate 198 — 198 170 — 170 Total commercial real estate 358 2,340 2,698 333 3,600 3,933 Total corporate loans 546 11,676 12,222 560 20,020 20,580 Home equity 31 179 210 36 240 276 1-4 family mortgages 624 238 862 637 — 637 Installment — — — — 254 254 Total consumer loans 655 417 1,072 673 494 1,167 Total loans $ 1,201 $ 12,093 $ 13,294 $ 1,233 $ 20,514 $ 21,747 (1) These TDRs are included in non-accrual loans in the preceding tables. A rollforward of the carrying value of TDRs for the quarters and six months ended June 30, 2020 and 2019 is presented in the following table. TDR Rollforward (Dollar amounts in thousands) Quarters Ended Six Months Ended 2020 2019 2020 2019 Accruing Beginning balance $ 1,216 $ 1,844 $ 1,233 $ 1,866 Additions — — — 12 Net payments (15) (20) (32) (54) Net transfers to non-accrual — (383) — (383) Ending balance 1,201 1,441 1,201 1,441 Non-accrual Beginning balance 17,917 9,375 20,514 6,612 Additions — — 934 — Net (payments) advances (2,595) (1,447) (3,253) 1,474 Charge-offs (3,229) (470) (6,102) (628) Net transfers from accruing — 383 — 383 Ending balance 12,093 7,841 12,093 7,841 Total TDRs $ 13,294 $ 9,282 $ 13,294 $ 9,282

Lease Obligations (Tables)

Lease Obligations (Tables)	6 Months Ended
	Jun. 30, 2020
Leases [Abstract]
Schedule of Future Minimum Lease Liability	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 and a reconciliation of those payments to the Company's lease liability as of June 30, 2020. Lease Liability (Dollar amounts in thousands) As of Year Ending December 31, 2020 $ 9,466 2021 18,785 2022 18,711 2023 18,811 2024 18,530 2025 and thereafter 105,995 Total minimum lease payments 190,298 Discount (1) (28,752) Lease liability (2) $ 161,546 (1) Represents the net present value adjustment related to minimum lease payments. (2) Included in accrued interest payable and other liabilities in the Consolidated Statements of Financial Condition.
Schedule of Net Operating Lease Expense	The following table presents net operating lease expense for the quarters and six months ended June 30, 2020 and 2019. Net Operating Lease Expense (Dollar amounts in thousands) Quarters Ended Six Months Ended 2020 2019 2020 2019 Lease expense charged to operations $ 4,839 $ 4,426 $ 9,514 $ 8,486 Rental income from premises leased to others (1) (183) (165) (398) (322) Net operating lease expense $ 4,656 $ 4,261 $ 9,116 $ 8,164 (1) Included as reductions to net occupancy and equipment expense in the Condensed Consolidated Statements of Income.

Borrowed Funds (Tables)

Borrowed Funds (Tables)	6 Months Ended
	Jun. 30, 2020
Debt Disclosure [Abstract]
Summary of Borrowed Funds	The following table summarizes the Company's borrowed funds by funding source. Summary of Borrowed Funds (Dollar amounts in thousands) As of June 30, December 31, Securities sold under agreements to repurchase $ 130,667 $ 103,515 Federal funds purchased 200,000 160,000 FHLB advances 1,974,528 1,395,243 Total borrowed funds $ 2,305,195 $ 1,658,758
Short Term Credit Lines Available For Use	The following table presents short-term credit lines available for use, for which the Company did not have an outstanding balance as of June 30, 2020 and December 31, 2019. Short-Term Credit Lines Available for Use (Dollar amounts in thousands) As of June 30, December 31, FRB's Discount Window Primary Credit Program $ 803,068 $ 874,256 Available federal funds lines 814,000 718,000 Correspondent bank line of credit 50,000 50,000

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	6 Months Ended
	Jun. 30, 2020
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 Six Months Ended 2020 2019 2020 2019 Net income $ 19,064 $ 47,014 $ 38,670 $ 93,072 Preferred dividends (1,037) — (1,037) — Net income applicable to unvested restricted shares (187) (389) (379) (792) Net income applicable to common shares $ 17,840 $ 46,625 $ 37,254 $ 92,280 Weighted-average common shares outstanding: Weighted-average common shares outstanding (basic) 113,145 108,467 111,533 107,126 Dilutive effect of common stock equivalents 191 — 339 — Weighted-average diluted common shares outstanding 113,336 108,467 111,872 107,126 Basic EPS $ 0.16 $ 0.43 $ 0.33 $ 0.86 Diluted EPS $ 0.16 $ 0.43 $ 0.33 $ 0.86

Derivative Instruments and He_2

Derivative Instruments and Hedging Activities (Tables)	6 Months Ended
	Jun. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Interest Rate Derivatives	Cash Flow Hedges (Dollar amounts in thousands) As of June 30, 2020 December 31, 2019 Gross notional amount outstanding $ 2,035,000 $ 1,905,000 Derivative asset fair value in other assets (1) 6,053 727 Derivative liability fair value in other liabilities (1) 198 (119) Weighted-average interest rate received 0.96 % 1.88 % Weighted-average interest rate paid 0.77 % 1.74 % Weighted-average maturity (in years) 2.30 1.18 (1) Certain cash flow hedges are transacted through a clearinghouse ("centrally cleared") and their change in fair value is settled by the counterparties to the transaction, which results in no fair value. The following table presents the impact of derivative instruments on net interest income for the quarters and six months ended June 30, 2020 and 2019. Hedge Income (Dollar amounts in thousands) Quarters Ended Six Months Ended 2020 2019 2020 2019 Cash Flow Hedges Interest rate swaps in interest income $ 2,624 $ 1,355 $ 3,069 $ 2,748 Interest rate swaps in interest expense — (1,924) — (3,948) Total cash flow hedges $ 2,624 $ (569) $ 3,069 $ (1,200)
Schedule of Derivative Instruments	Other Derivative Instruments (Dollar amounts in thousands) As of June 30, 2020 December 31, 2019 Gross notional amount outstanding $ 4,589,018 $ 4,340,384 Derivative asset fair value in other assets (1) 183,938 61,709 Derivative liability fair value in other liabilities (1) (55,026) (18,416) Fair value of derivative (2) 56,025 18,856 (1) Certain other derivative instruments are centrally cleared and their change in fair value is settled by the counterparties to the transaction, which results in no fair value. (2) This amount represents the fair value if credit risk related contingent features were triggered.
Cash Flow Hedge Accounting on AOCI	The following table presents the impact of derivative instruments on comprehensive income (loss) and the reclassification of gains (losses) from accumulated other comprehensive income (loss) to net interest income for the quarters and six months ended June 30, 2020 and 2019. Cash Flow Hedge Accounting on AOCI (Dollar amounts in thousands) Quarters Ended Six Months Ended 2020 2019 2020 2019 Gains (losses) recognized in other comprehensive income Interest rate swaps in interest income $ 5,951 $ 5,944 $ 27,955 $ 9,297 Interest rate swaps in interest expense (1,276) (7,816) (13,685) (11,996) Reclassification of gains (losses) included in net income Interest rate swaps in interest income $ 2,624 $ 1,355 $ 3,069 $ 2,748 Interest rate swaps in interest expense — (1,924) — (3,948)
Offsetting Assets	The following table presents the fair value of the Company's derivatives and offsetting positions as of June 30, 2020 and December 31, 2019. Fair Value of Offsetting Derivatives (Dollar amounts in thousands) As of June 30, 2020 As of December 31, 2019 Assets Liabilities Assets Liabilities Gross amounts recognized $ 189,991 $ 54,828 $ 62,436 $ 18,535 Less: amounts offset in the Consolidated Statements of — — — — Net amount presented in the Consolidated Statements of Financial Condition (1) 189,991 54,828 62,436 18,535 Gross amounts not offset in the Consolidated Statements of Offsetting derivative positions (7,495) (7,495) (2,674) (2,674) Cash collateral pledged — (48,430) — (15,861) Net credit exposure $ 182,496 $ (1,097) $ 59,762 $ — (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 June 30, 2020 and December 31, 2019. Fair Value of Offsetting Derivatives (Dollar amounts in thousands) As of June 30, 2020 As of December 31, 2019 Assets Liabilities Assets Liabilities Gross amounts recognized $ 189,991 $ 54,828 $ 62,436 $ 18,535 Less: amounts offset in the Consolidated Statements of — — — — Net amount presented in the Consolidated Statements of Financial Condition (1) 189,991 54,828 62,436 18,535 Gross amounts not offset in the Consolidated Statements of Offsetting derivative positions (7,495) (7,495) (2,674) (2,674) Cash collateral pledged — (48,430) — (15,861) Net credit exposure $ 182,496 $ (1,097) $ 59,762 $ — (1) Included in other assets or other liabilities in the Consolidated Statements of Financial Condition.

Commitments, Guarantees, and _2

Commitments, Guarantees, and Contingent Liabilities (Tables)	6 Months Ended
	Jun. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Schedule of Contractual or Notional Amounts of Financial Instruments	Contractual or Notional Amounts of Financial Instruments (Dollar amounts in thousands) As of June 30, 2020 December 31, 2019 Commitments to extend credit: Commercial, industrial, and agricultural $ 2,276,196 $ 1,852,040 Commercial real estate 324,659 296,053 Home equity 578,920 576,956 Other commitments (1) 251,716 251,093 Total commitments to extend credit $ 3,431,491 $ 2,976,142 Letters of credit $ 100,827 $ 103,684 (1) Other commitments includes installment and overdraft protection program commitments.

Fair Value (Tables)

Fair Value (Tables)	6 Months Ended
	Jun. 30, 2020
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 June 30, 2020 As of December 31, 2019 Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Assets Equity securities $ 24,075 $ 14,879 $ — $ 23,703 $ 13,400 $ — Securities available-for-sale U.S. treasury securities 21,199 — — 34,075 — — U.S. agency securities — 643,047 — — 248,424 — CMOs — 1,672,129 — — 1,557,671 — MBSs — 715,140 — — 684,684 — Municipal securities — 239,803 — — 234,431 — Corporate debt securities — 144,544 — — 114,101 — Total securities available-for-sale 21,199 3,414,663 — 34,075 2,839,311 — Mortgage servicing rights ("MSRs") (1) — — 4,464 — — 5,858 Derivative assets (1) — 189,991 — — 62,436 — Liabilities Derivative liabilities (2) $ — $ 54,828 $ — $ — $ 18,535 $ — (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 MSRs	The following table presents the ranges of significant, unobservable inputs used by the Company to determine the fair value of MSRs as of June 30, 2020 and December 31, 2019. Significant Unobservable Inputs Used in the Valuation of MSRs As of June 30, 2020 December 31, 2019 Prepayment speed 7.6 % - 14.9% 6.7 % - 12.0% Maturity (months) 16 - 88 18 - 94 Discount rate 9.4 % - 12.0% 9.3 % - 12.0%
Schedule of Servicing Assets at Fair Value	A rollforward of the carrying value of MSRs for the quarters and six months ended June 30, 2020 and 2019 is presented in the following table. Carrying Value of MSRs (Dollar amounts in thousands) Quarters Ended Six Months Ended 2020 2019 2020 2019 Beginning balance $ 4,874 $ 6,228 $ 5,858 $ 6,730 New MSRs 745 204 901 457 Total gains (losses) included in earnings (1) : Changes in valuation inputs and assumptions (750) (389) (1,658) (989) Other changes in fair value (2) (405) (212) (637) (367) Ending balance (3) $ 4,464 $ 5,831 $ 4,464 $ 5,831 Contractual servicing fees earned (1) $ 394 $ 390 $ 797 $ 771 (1) Included in mortgage banking income in the Condensed Consolidated Statements of Income and related to assets held as of June 30, 2020 and 2019. (2) Primarily represents changes in expected future cash flows due to payoffs and paydowns. (3) Included in other assets in the Consolidated Statements of Financial Condition.
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 June 30, 2020 As of December 31, 2019 Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Collateral-dependent non-accrual loans (1) $ — $ — $ 53,608 $ — $ — $ 41,326 OREO (2) — — 530 — — 3,325 Loans held-for-sale (3) — — 45,466 — — 36,032 Assets held-for-sale (4) — — 5,180 — — 6,824 (1) Includes non-accrual loans with charge-offs and non-accrual loans with a specific allowance 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 June 30, 2020 December 31, 2019 Fair Value Hierarchy Carrying Fair Value Carrying Fair Value Assets Cash and due from banks 1 $ 304,445 $ 304,445 $ 214,894 $ 214,894 Interest-bearing deposits in other banks 2 637,856 637,856 84,327 84,327 Securities held-to-maturity 2 19,628 19,676 21,997 21,234 FHLB and FRB stock 2 148,512 148,512 115,409 115,409 Loans 3 14,693,606 14,739,129 12,733,200 12,535,848 Investment in BOLI 3 299,649 299,649 296,351 296,351 Accrued interest receivable 3 63,162 63,162 59,716 59,716 Liabilities Deposits 2 $ 15,657,656 $ 15,667,051 $ 13,251,278 $ 13,247,871 Borrowed funds 2 2,305,195 2,305,195 1,658,758 1,658,758 Senior and subordinated debt 2 234,358 266,003 233,948 277,203 Accrued interest payable 2 7,633 7,633 10,502 10,502

Recent Accounting Pronounceme_2

Recent Accounting Pronouncements and Other Guidance (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019		Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit loss	$ 247,677	$ 226,701	$ 76,000	$ 109,222		$ 106,929	$ 104,779	$ 103,419
Allowance for securities held-to-maturity	(220)		220
Cumulative effect adjustment	(2,656,211)	(2,435,707)		(2,370,793)		(2,300,573)	(2,159,471)	(2,054,998)
COVID-19, loans modification	1,900,000
Cumulative Effect, Period Of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit loss				75,757
Cumulative effect adjustment				26,821	[1]			(47,257)	[2]
Unfunded Loan Commitments
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit loss			5,600
PCD
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit loss	44,434		35,700	3,197
Non-PCD
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit loss			8,500
Loans
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit loss			$ 26,000
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment	$ (1,359,407)	$ (1,357,395)		(1,380,612)		$ (1,304,756)	$ (1,273,245)	(1,192,767)
Retained Earnings | Cumulative Effect, Period Of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment				$ 26,821	[1]			$ (47,257)	[2]
[1]	As a result of accounting guidance adopted in the first quarter of 2020, a portion of the increase in allowance for credit losses, net of tax, was recognized as a cumulative-effect adjustment to retained earnings as of January 1, 2020. For further discussion of this guidance, see Note 2, "Recent Accounting Pronouncements and Other Guidance."
[2]	As a result of accounting guidance adopted in the first quarter of 2019, the remaining deferred gain on a sale-leaseback transaction was recognized as a cumulative-effect adjustment to retained earnings as of January 1, 2019.

Acquisitions - Additional Infor

Acquisitions - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	Mar. 09, 2020	May 09, 2019	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Jan. 16, 2019
Business Acquisition [Line Items]
Acquisition and integration related expenses			$ 5,249	$ 9,514	$ 10,721	$ 13,205
Bankmanagers Corporation
Business Acquisition [Line Items]
Total assets	$ 1,151,236
Total deposits	950,076
Loans	$ 685,451
Fixed exchange ratio (in shares)	29.9675
Cash paid per share (in dollars per share)	$ 623.02
Special dividends paid (in dollars per share)	$ 346
Consideration transferred	$ 174,382
Common stock, shares issued (in shares)	4,930,231
Cash paid	$ 102,499
Goodwill	$ 62,433
Bridgeview Bancorp, Inc.
Business Acquisition [Line Items]
Total assets		$ 1,165,815
Total deposits		986,754
Loans		$ 709,438
Fixed exchange ratio (in shares)		0.2767
Cash paid per share (in dollars per share)		$ 1.66
Consideration transferred		$ 135,352
Common stock, shares issued (in shares)		4,728,541
Cash paid		$ 37,140
Goodwill		$ 63,231
Northern Oak Wealth Management, Inc.
Business Acquisition [Line Items]
Assets under management acquired							$ 800,000

Acquisitions - Schedule of Acqu

Acquisitions - Schedule of Acquisition Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	Mar. 09, 2020	May 09, 2019
Bankmanagers Corporation
Assets
Cash and due from banks and interest-bearing deposits in other banks	$ 244,781
Equity securities	0
Securities available-for-sale	136,856
Securities held-to-maturity	300
FHLB and FRB stock	0
Loans	685,451
OREO	2,001
Goodwill	62,433
Other intangible assets	3,068
Premises, furniture, and equipment	2,550
Accrued interest receivable and other assets	13,796
Total assets	1,151,236
Liabilities
Noninterest-bearing deposits	356,050
Interest-bearing deposits	594,026
Total deposits	950,076
Borrowed funds	11,532
Senior and subordinated debt	0
Accrued interest payable and other liabilities	15,246
Total liabilities	976,854
Consideration Paid
Common stock (2020 – 4,930,231, shares issued at $14.58 per share, 2019 – 4,728,541, shares issued at $20.77 per share), net of issuance costs	71,883
Cash paid	102,499
Total consideration paid	$ 174,382
Common stock, shares issued (in shares)	4,930,231
Shares issued (in dollars per share)	$ 14.58
Bridgeview Bancorp, Inc.
Assets
Cash and due from banks and interest-bearing deposits in other banks		$ 35,097
Equity securities		6,966
Securities available-for-sale		263,090
Securities held-to-maturity		13,426
FHLB and FRB stock		1,481
Loans		709,438
OREO		5,436
Goodwill		63,231
Other intangible assets		15,603
Premises, furniture, and equipment		16,138
Accrued interest receivable and other assets		35,909
Total assets		1,165,815
Liabilities
Noninterest-bearing deposits		179,267
Interest-bearing deposits		807,487
Total deposits		986,754
Borrowed funds		1,746
Senior and subordinated debt		29,360
Accrued interest payable and other liabilities		12,603
Total liabilities		1,030,463
Consideration Paid
Common stock (2020 – 4,930,231, shares issued at $14.58 per share, 2019 – 4,728,541, shares issued at $20.77 per share), net of issuance costs		98,212
Cash paid		37,140
Total consideration paid		$ 135,352
Common stock, shares issued (in shares)		4,728,541
Shares issued (in dollars per share)		$ 20.77

Securities - Securities Portfol

Securities - Securities Portfolio (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jan. 01, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 3,354,125		$ 2,851,479
Gross Unrealized Gains	86,368		31,205
Gross Unrealized Losses	(4,631)		(9,298)
Fair Value	3,435,862		2,873,386
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	19,628
Gross Unrealized Gains	48
Gross Unrealized Losses	0
Fair Value	19,676
Allowance for securities held-to-maturity	(220)	$ 220
Securities held-to-maturity, at amortized cost, net	19,628		21,997
Fair value, net of allowance	19,676
Debt and Equity Securities, FV-NI [Line Items]
Equity securities	43,954		42,136
U.S. treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	20,992		33,939
Gross Unrealized Gains	207		137
Gross Unrealized Losses	0		(1)
Fair Value	21,199		34,075
U.S. agency securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	640,253		249,502
Gross Unrealized Gains	4,166		758
Gross Unrealized Losses	(1,372)		(1,836)
Fair Value	643,047		248,424
Collateralized mortgage obligations ("CMOs")
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,624,609		1,547,805
Gross Unrealized Gains	49,059		14,893
Gross Unrealized Losses	(1,539)		(5,027)
Fair Value	1,672,129		1,557,671
Other mortgage-backed securities ("MBSs")
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	695,218		678,804
Gross Unrealized Gains	20,159		7,728
Gross Unrealized Losses	(237)		(1,848)
Fair Value	715,140		684,684
Municipal securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	229,414		228,632
Gross Unrealized Gains	10,410		5,898
Gross Unrealized Losses	(21)		(99)
Fair Value	239,803		234,431
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	19,848		21,997
Gross Unrealized Gains	48		0
Gross Unrealized Losses	0		(763)
Fair Value	19,896		21,234
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	143,639		112,797
Gross Unrealized Gains	2,367		1,791
Gross Unrealized Losses	(1,462)		(487)
Fair Value	144,544		114,101
Equity securities
Debt and Equity Securities, FV-NI [Line Items]
Equity securities	$ 43,954		$ 42,136

Securities - Additional Informa

Securities - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Interest receivable on securities	$ 13,600,000		$ 13,600,000		$ 11,300,000
Available-for-sale securities pledged	1,500,000,000		1,500,000,000		1,300,000,000
Held-to-maturity securities pledged as collateral	0		0		$ 0
Realized gains (losses) on securities available-for-sale	$ 0	$ 0	$ (1,005,000)	$ 0

Securities - Remaining Contract

Securities - Remaining Contractual Maturity of Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Available-for-sale Securities, Amortized Cost [Abstract]
One year or less	$ 270,623
After one year to five years	185,159
After five years to ten years	578,516
After ten years	0
Securities that do not have a single contractual maturity date	2,319,827
Amortized Cost	3,354,125	$ 2,851,479
Fair Value
One year or less	274,363
After one year to five years	187,718
After five years to ten years	586,512
After ten years	0
Securities that do not have a single contractual maturity date	2,387,269
Fair Value	3,435,862	$ 2,873,386
Held-to-maturity Securities, Amortized Cost [Abstract]
One year or less	8,070
After one year to five years	5,452
After five years to ten years	3,315
After ten years	2,791
Securities that do not have a single contractual maturity date	0
Amortized Cost	19,628
Held-to-maturity Securities, Fair Value [Abstract]
One year or less	8,089
After one year to five years	5,465
After five years to ten years	3,323
After ten years	2,799
Securities that do not have a single contractual maturity date	0
Fair Value	$ 19,676

Securities - Securities In An U

Securities - Securities In An Unrealized Loss Position (Details) $ in Thousands	Jun. 30, 2020USD ($)security	Dec. 31, 2019USD ($)security
Securities Available-for-Sale
Number of Securities | security	90	286
Fair Value
Less Than 12 Months	$ 319,709	$ 375,608
12 Months or Longer	89,898	608,390
Total	409,607	983,998
Unrealized Losses
Less Than 12 Months	2,926	4,744
12 Months or Longer	1,705	4,554
Total	$ 4,631	$ 9,298
U.S. treasury securities
Securities Available-for-Sale
Number of Securities | security		5
Fair Value
Less Than 12 Months		$ 4,966
12 Months or Longer		0
Total		4,966
Unrealized Losses
Less Than 12 Months		1
12 Months or Longer		0
Total		$ 1
U.S. agency securities
Securities Available-for-Sale
Number of Securities | security	23	52
Fair Value
Less Than 12 Months	$ 73,659	$ 97,729
12 Months or Longer	13,927	49,387
Total	87,586	147,116
Unrealized Losses
Less Than 12 Months	1,149	1,200
12 Months or Longer	223	636
Total	$ 1,372	$ 1,836
CMOs
Securities Available-for-Sale
Number of Securities | security	41	148
Fair Value
Less Than 12 Months	$ 139,578	$ 187,470
12 Months or Longer	33,967	412,083
Total	173,545	599,553
Unrealized Losses
Less Than 12 Months	1,379	2,177
12 Months or Longer	160	2,850
Total	$ 1,539	$ 5,027
MBSs
Securities Available-for-Sale
Number of Securities | security	14	59
Fair Value
Less Than 12 Months	$ 64,778	$ 66,340
12 Months or Longer	3,805	121,861
Total	68,583	188,201
Unrealized Losses
Less Than 12 Months	223	996
12 Months or Longer	14	852
Total	$ 237	$ 1,848
Municipal securities
Securities Available-for-Sale
Number of Securities | security	1	16
Fair Value
Less Than 12 Months	$ 1,745	$ 9,384
12 Months or Longer	0	3,104
Total	1,745	12,488
Unrealized Losses
Less Than 12 Months	21	89
12 Months or Longer	0	10
Total	$ 21	$ 99
Corporate debt securities
Securities Available-for-Sale
Number of Securities | security	11	6
Fair Value
Less Than 12 Months	$ 39,949	$ 9,719
12 Months or Longer	38,199	21,955
Total	78,148	31,674
Unrealized Losses
Less Than 12 Months	154	281
12 Months or Longer	1,308	206
Total	$ 1,462	$ 487

Loans - Loan Portfolio (Details

Loans - Loan Portfolio (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 14,933,658	$ 12,840,330
Deferred loan fees included in total loans	9,691	7,972
Overdrawn demand deposits included in total loans	7,676	10,675
Interest receivable on loan portfolio	49,500	48,400
Commercial Industrial And Agricultural | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	4,789,556	4,481,525
Commercial Industrial And Agricultural | Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	381,124	405,616
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	5,058,179	4,682,072
Commercial real estate | Office, retail, and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,020,318	1,848,718
Commercial real estate | Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	874,861	856,553
Commercial real estate | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	687,063	593,093
Commercial real estate | Other commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,475,937	1,383,708
Commercial Portfolio Segment, Excluding PPP Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	10,228,859	9,569,213
PPP loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,179,403	0
Total corporate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	11,408,262	9,569,213
Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	3,525,396	3,271,117
Consumer loans | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	892,867	851,454
Consumer loans | 1-4 family mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,175,322	1,927,078
Consumer loans | Installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 457,207	$ 492,585

Loans - Loans Sales (Details)

Loans - Loans Sales (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total net gains on loan sales		$ 4,601	$ 1,981	$ 7,230	$ 3,391
Corporate Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Payments for loan purchases	[1]	36,152	132,034	182,613	189,573
Consumer Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Payments for loan purchases	[1]	179,410	270,692	394,552	381,874
Corporate loan sales
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sales		295	2,178	4,598	5,376
Less book value of loans sold		289	2,132	4,477	5,248
Total net gains on loan sales	[2]	6	46	121	128
1-4 family mortgage loan sales
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sales		173,251	95,408	292,410	154,191
Less book value of loans sold		168,656	93,473	285,301	150,928
Total net gains on loan sales	[3]	4,595	1,935	7,109	3,263
1-4 family mortgage loan sales | Consumer Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Payments for loan purchases	[1]	179,410	231,533	249,585	304,463
Commercial and industrial | Corporate Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Payments for loan purchases	[1]	22,894	128,891	168,716	181,610
Office, retail, and industrial | Corporate Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Payments for loan purchases	[1]	0	1,711	0	1,711
Construction | Corporate Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Payments for loan purchases	[1]	3,258	1,432	3,897	2,266
Other commercial real estate | Corporate Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Payments for loan purchases	[1]	10,000	0	10,000	3,986
Home equity | Consumer Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Payments for loan purchases	[1]	$ 0	$ 39,159	$ 144,967	$ 77,411
[1]	Consists of the Company's portion of loan participations purchased.
[2]	Net gains on corporate loan sales are included in other service charges, commissions, and fees in the Condensed Consolidated Statements of Income.
[3]	Net gains on 1-4 family mortgage loan sales are included in mortgage banking income in the Condensed Consolidated Statements of Income. (3) Consists of the Company's portion of loan participations purchased.

Acquired Loans - Schedule of Ac

Acquired Loans - Schedule of Acquired Loans (Details) - USD ($) $ in Thousands		Jun. 30, 2020	Dec. 31, 2019
Acquired loans
Acquired Loans (Details) - Acquired Loans [Line Items]
Non-PCD	[1],[2]	$ 1,516,157	$ 1,216,133
Total	[1],[2]	1,759,364	1,383,316
Receivables acquired with deteriorated credit quality
Acquired Loans (Details) - Acquired Loans [Line Items]
PCD		243,207	167,183
Receivables acquired with deteriorated credit quality | Acquired loans
Acquired Loans (Details) - Acquired Loans [Line Items]
PCD	[1],[2]	$ 243,207	$ 167,183
[1]	Included in loans in the Consolidated Statements of Financial Condition. (2) Prior to the adoption of CECL on January 1, 2020, 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 were classified as PCI.
[2]	Prior to the adoption of CECL on January 1, 2020, 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 were classified as PCI.

Acquired Loans - Additional Inf

Acquired Loans - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Certain Loans Acquired in Transfer Accounted for as Debt Securities Accretable Yield Movement Schedule [Line Items]
Outstanding balance of PCI loans	$ 284.3		$ 284.3		$ 243
Acquired and covered receivables
Certain Loans Acquired in Transfer Accounted for as Debt Securities Accretable Yield Movement Schedule [Line Items]
Accretion on acquired loans	$ 7	$ 10.3	$ 13.9	$ 16.7

Past Due Loans, Allowance For_3

Past Due Loans, Allowance For Credit Losses, Non-Accrual Loans, and TDRS - Aging Analysis of Past Due Loans and Non-Performing Loans by Class (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Current	$ 14,780,524	$ 12,754,845
Total Past Due	153,134	85,485
Total Loans	14,933,658	12,840,330
Non-accrual	139,160	82,269
90 Days or More Past Due, Still Accruing Interest	3,241	5,001
30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	41,532	35,192
90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	111,602	50,293
Commercial Industrial And Agricultural
Financing Receivable, Past Due [Line Items]
Total Loans	5,170,680	4,887,141
Commercial Industrial And Agricultural | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Current	4,750,932	4,455,381
Total Past Due	38,624	26,144
Total Loans	4,789,556	4,481,525
Non-accrual	28,349	29,995
90 Days or More Past Due, Still Accruing Interest	1,090	2,207
Commercial Industrial And Agricultural | Agricultural
Financing Receivable, Past Due [Line Items]
Current	373,910	398,676
Total Past Due	7,214	6,940
Total Loans	381,124	405,616
Non-accrual	8,494	5,954
90 Days or More Past Due, Still Accruing Interest	0	358
Commercial Industrial And Agricultural | 30-89 Days Past Due | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total Past Due	20,550	11,468
Commercial Industrial And Agricultural | 30-89 Days Past Due | Agricultural
Financing Receivable, Past Due [Line Items]
Total Past Due	0	850
Commercial Industrial And Agricultural | 90 Days or More Past Due | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total Past Due	18,074	14,676
Commercial Industrial And Agricultural | 90 Days or More Past Due | Agricultural
Financing Receivable, Past Due [Line Items]
Total Past Due	7,214	6,090
Commercial real estate
Financing Receivable, Past Due [Line Items]
Current	4,970,994	4,649,826
Total Past Due	87,185	32,246
Total Loans	5,058,179	4,682,072
Non-accrual	84,690	33,435
90 Days or More Past Due, Still Accruing Interest	709	1,075
Commercial real estate | Office, retail, and industrial
Financing Receivable, Past Due [Line Items]
Current	1,982,798	1,830,321
Total Past Due	37,520	18,397
Total Loans	2,020,318	1,848,718
Non-accrual	35,915	25,857
90 Days or More Past Due, Still Accruing Interest	596	546
Commercial real estate | Multi-family
Financing Receivable, Past Due [Line Items]
Current	870,430	853,762
Total Past Due	4,431	2,791
Total Loans	874,861	856,553
Non-accrual	3,121	2,697
90 Days or More Past Due, Still Accruing Interest	0	0
Commercial real estate | Construction
Financing Receivable, Past Due [Line Items]
Current	658,892	588,065
Total Past Due	28,171	5,028
Total Loans	687,063	593,093
Non-accrual	27,282	152
90 Days or More Past Due, Still Accruing Interest	88	0
Commercial real estate | Other commercial real estate
Financing Receivable, Past Due [Line Items]
Current	1,458,874	1,377,678
Total Past Due	17,063	6,030
Total Loans	1,475,937	1,383,708
Non-accrual	18,372	4,729
90 Days or More Past Due, Still Accruing Interest	25	529
Commercial real estate | 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	12,457	11,263
Commercial real estate | 30-89 Days Past Due | Office, retail, and industrial
Financing Receivable, Past Due [Line Items]
Total Past Due	4,973	2,943
Commercial real estate | 30-89 Days Past Due | Multi-family
Financing Receivable, Past Due [Line Items]
Total Past Due	1,538	211
Commercial real estate | 30-89 Days Past Due | Construction
Financing Receivable, Past Due [Line Items]
Total Past Due	801	4,876
Commercial real estate | 30-89 Days Past Due | Other commercial real estate
Financing Receivable, Past Due [Line Items]
Total Past Due	5,145	3,233
Commercial real estate | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	74,728	20,983
Commercial real estate | 90 Days or More Past Due | Office, retail, and industrial
Financing Receivable, Past Due [Line Items]
Total Past Due	32,547	15,454
Commercial real estate | 90 Days or More Past Due | Multi-family
Financing Receivable, Past Due [Line Items]
Total Past Due	2,893	2,580
Commercial real estate | 90 Days or More Past Due | Construction
Financing Receivable, Past Due [Line Items]
Total Past Due	27,370	152
Commercial real estate | 90 Days or More Past Due | Other commercial real estate
Financing Receivable, Past Due [Line Items]
Total Past Due	11,918	2,797
Commercial Portfolio Segment, Excluding PPP Loans
Financing Receivable, Past Due [Line Items]
Current	10,095,836
Total Past Due	133,023
Total Loans	10,228,859
Non-accrual	121,533
90 Days or More Past Due, Still Accruing Interest	1,799
Commercial Portfolio Segment, Excluding PPP Loans | 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	33,007
Commercial Portfolio Segment, Excluding PPP Loans | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	100,016
PPP loans
Financing Receivable, Past Due [Line Items]
Total Past Due	0
Total Loans	1,179,403
Non-accrual	0
90 Days or More Past Due, Still Accruing Interest	0
PPP loans | 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	0
PPP loans | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	0
Total corporate loans
Financing Receivable, Past Due [Line Items]
Current	11,275,239	9,503,883
Total Past Due	133,023	65,330
Total Loans	11,408,262	9,569,213
Non-accrual	121,533	69,384
90 Days or More Past Due, Still Accruing Interest	1,799	3,640
Total corporate loans | 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	33,007	23,581
Total corporate loans | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	100,016	41,749
Consumer loans
Financing Receivable, Past Due [Line Items]
Current	3,505,285	3,250,962
Total Past Due	20,111	20,155
Total Loans	3,525,396	3,271,117
Non-accrual	17,627	12,885
90 Days or More Past Due, Still Accruing Interest	1,442	1,361
Consumer loans | Home equity
Financing Receivable, Past Due [Line Items]
Current	885,678	841,908
Total Past Due	7,189	9,546
Total Loans	892,867	851,454
Non-accrual	9,129	8,443
90 Days or More Past Due, Still Accruing Interest	187	146
Consumer loans | 1-4 family mortgages
Financing Receivable, Past Due [Line Items]
Current	2,164,611	1,917,648
Total Past Due	10,711	9,430
Total Loans	2,175,322	1,927,078
Non-accrual	8,498	4,442
90 Days or More Past Due, Still Accruing Interest	0	1,203
Consumer loans | Installment
Financing Receivable, Past Due [Line Items]
Current	454,996	491,406
Total Past Due	2,211	1,179
Total Loans	457,207	492,585
Non-accrual	0	0
90 Days or More Past Due, Still Accruing Interest	1,255	12
Consumer loans | 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	8,525	11,611
Consumer loans | 30-89 Days Past Due | Home equity
Financing Receivable, Past Due [Line Items]
Total Past Due	2,641	4,992
Consumer loans | 30-89 Days Past Due | 1-4 family mortgages
Financing Receivable, Past Due [Line Items]
Total Past Due	4,928	5,452
Consumer loans | 30-89 Days Past Due | Installment
Financing Receivable, Past Due [Line Items]
Total Past Due	956	1,167
Consumer loans | 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	11,586	8,544
Consumer loans | 90 Days or More Past Due | Home equity
Financing Receivable, Past Due [Line Items]
Total Past Due	4,548	4,554
Consumer loans | 90 Days or More Past Due | 1-4 family mortgages
Financing Receivable, Past Due [Line Items]
Total Past Due	5,783	3,978
Consumer loans | 90 Days or More Past Due | Installment
Financing Receivable, Past Due [Line Items]
Total Past Due	$ 1,255	$ 12

Past Due Loans, Allowance For_4

Past Due Loans, Allowance For Credit Losses, Non-Accrual Loans, and TDRS - Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance	$ 226,701	$ 104,779	$ 109,222	$ 103,419
Allowance established for acquired PCD loans	1,250		15,554
Charge-offs	(14,234)	(11,424)	(28,164)	(22,201)
Recoveries	1,311	2,083	3,127	3,776
Net charge-offs	(12,923)	(9,341)	(25,037)	(18,425)
Provision for loan losses and other	32,649	11,491	72,181	21,935
Ending balance	247,677	106,929	247,677	106,929
Allowance for Unfunded Commitments
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance	6,753	1,200	1,200	1,200
Allowance established for acquired PCD loans	872		872
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Net charge-offs	0	0	0	0
Provision for loan losses and other	0	0	0	0
Ending balance	7,625	1,200	7,625	1,200
Commercial, Industrial, and Agricultural
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance	113,733	64,685	62,830	63,276
Allowance established for acquired PCD loans	378		12,640
Charge-offs	(5,673)	(6,516)	(12,739)	(12,967)
Recoveries	820	1,258	1,979	2,559
Net charge-offs	(4,853)	(5,258)	(10,760)	(10,408)
Provision for loan losses and other	14,719	6,937	39,108	13,496
Ending balance	123,977	66,364	123,977	66,364
Commercial Real Estate
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance			18,635
Ending balance	63,136		63,136
Commercial Real Estate | Office, Retail, and Industrial
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance	25,856	7,679	7,580	7,900
Allowance established for acquired PCD loans	0		2,003
Charge-offs	(3,092)	(1,605)	(3,430)	(2,233)
Recoveries	6	151	15	161
Net charge-offs	(3,086)	(1,454)	(3,415)	(2,072)
Provision for loan losses and other	1,671	1,270	6,587	1,667
Ending balance	24,441	7,495	24,441	7,495
Commercial Real Estate | Multi-family
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance	3,689	2,216	2,950	2,464
Allowance established for acquired PCD loans	0		0
Charge-offs	(9)	0	(19)	(340)
Recoveries	0	0	5	1
Net charge-offs	(9)	0	(14)	(339)
Provision for loan losses and other	1,631	(57)	1,978	34
Ending balance	5,311	2,159	5,311	2,159
Commercial Real Estate | Construction
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance	11,297	2,131	1,697	2,173
Allowance established for acquired PCD loans	0		0
Charge-offs	(798)	0	(2,606)	(6)
Recoveries	0	10	0	16
Net charge-offs	(798)	10	(2,606)	10
Provision for loan losses and other	1,023	(279)	2,131	(321)
Ending balance	11,522	1,862	11,522	1,862
Commercial Real Estate | Other Commercial Real Estate
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance	18,554	4,930	6,408	4,934
Allowance established for acquired PCD loans	0		0
Charge-offs	(31)	(329)	(339)	(539)
Recoveries	12	45	156	66
Net charge-offs	(19)	(284)	(183)	(473)
Provision for loan losses and other	3,327	351	4,210	536
Ending balance	21,862	4,997	21,862	4,997
Consumer
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance			26,557
Ending balance	52,939		52,939
Consumer | Consumer
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance	46,819	21,938	26,557	21,472
Allowance established for acquired PCD loans	0		39
Charge-offs	(4,631)	(2,974)	(9,031)	(6,116)
Recoveries	473	619	972	973
Net charge-offs	(4,158)	(2,355)	(8,059)	(5,143)
Provision for loan losses and other	10,278	3,269	18,167	6,523
Ending balance	$ 52,939	$ 22,852	52,939	$ 22,852
Cumulative Effect, Period Of Adoption, Adjustment
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance			75,757
Cumulative Effect, Period Of Adoption, Adjustment | Allowance for Unfunded Commitments
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance			5,553
Cumulative Effect, Period Of Adoption, Adjustment | Commercial, Industrial, and Agricultural
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance			20,159
Cumulative Effect, Period Of Adoption, Adjustment | Commercial Real Estate | Office, Retail, and Industrial
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance			11,686
Cumulative Effect, Period Of Adoption, Adjustment | Commercial Real Estate | Multi-family
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance			397
Cumulative Effect, Period Of Adoption, Adjustment | Commercial Real Estate | Construction
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance			10,300
Cumulative Effect, Period Of Adoption, Adjustment | Commercial Real Estate | Other Commercial Real Estate
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance			11,427
Cumulative Effect, Period Of Adoption, Adjustment | Consumer | Consumer
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Beginning balance			$ 16,235

Past Due Loans, Allowance For_5

Past Due Loans, Allowance For Credit Losses, Non-Accrual Loans, and TDRS - Loans and Related Allowance for Credit Losses by Portfolio Segment (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, Individually Evaluated for Impairment	$ 74,580			$ 64,321
Loans, Collectively Evaluated for Impairment	14,615,871			12,608,826
Loans	14,933,658			12,840,330
Allowance for Credit Losses Individually Evaluated for Impairment	5,734			3,992
Allowance for Credit Losses Collectively Evaluated for Impairment	197,509			102,033
Total Allowance for Credit Losses	247,677	$ 226,701	$ 76,000	109,222	$ 106,929	$ 104,779	$ 103,419
PCD
Financing Receivable, Allowance for Credit Loss [Line Items]
PCD	243,207			167,183
Total Allowance for Credit Losses	44,434		$ 35,700	3,197
Commercial Industrial And Agricultural
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, Individually Evaluated for Impairment	25,190			34,142
Loans, Collectively Evaluated for Impairment	5,049,876			4,807,114
Loans	5,170,680			4,887,141
Allowance for Credit Losses Individually Evaluated for Impairment	4,805			3,414
Allowance for Credit Losses Collectively Evaluated for Impairment	102,735			59,108
Total Allowance for Credit Losses	123,977	113,733		62,830	66,364	64,685	63,276
Commercial Industrial And Agricultural | PCD
Financing Receivable, Allowance for Credit Loss [Line Items]
PCD	95,614			45,885
Total Allowance for Credit Losses	16,437			308
Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, Individually Evaluated for Impairment	49,367			30,179
Loans, Collectively Evaluated for Impairment	4,884,577			4,552,796
Loans	5,058,179			4,682,072
Allowance for Credit Losses Individually Evaluated for Impairment	929			578
Allowance for Credit Losses Collectively Evaluated for Impairment	35,046			16,301
Total Allowance for Credit Losses	63,136			18,635
Commercial real estate | PCD
Financing Receivable, Allowance for Credit Loss [Line Items]
PCD	124,235			99,097
Total Allowance for Credit Losses	27,161			1,756
Commercial Portfolio Segment, Excluding PPP Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, Individually Evaluated for Impairment	74,557
Loans, Collectively Evaluated for Impairment	9,934,453
Loans	10,228,859
Allowance for Credit Losses Individually Evaluated for Impairment	5,734
Allowance for Credit Losses Collectively Evaluated for Impairment	137,781
Total Allowance for Credit Losses	187,113
Commercial Portfolio Segment, Excluding PPP Loans | PCD
Financing Receivable, Allowance for Credit Loss [Line Items]
PCD	219,849
Total Allowance for Credit Losses	43,598
PPP loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, Individually Evaluated for Impairment	0
Loans, Collectively Evaluated for Impairment	1,179,403
Loans	1,179,403
Allowance for Credit Losses Individually Evaluated for Impairment	0
Allowance for Credit Losses Collectively Evaluated for Impairment	0
Total Allowance for Credit Losses	0
PPP loans | PCD
Financing Receivable, Allowance for Credit Loss [Line Items]
PCD	0
Total Allowance for Credit Losses	0
Total corporate loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, Individually Evaluated for Impairment	74,557			64,321
Loans, Collectively Evaluated for Impairment	11,113,856			9,359,910
Loans	11,408,262			9,569,213
Allowance for Credit Losses Individually Evaluated for Impairment	5,734			3,992
Allowance for Credit Losses Collectively Evaluated for Impairment	137,781			75,409
Total Allowance for Credit Losses	187,113			81,465
Total corporate loans | PCD
Financing Receivable, Allowance for Credit Loss [Line Items]
PCD	219,849			144,982
Total Allowance for Credit Losses	43,598			2,064
Consumer loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, Individually Evaluated for Impairment	23			0
Loans, Collectively Evaluated for Impairment	3,502,015			3,248,916
Loans	3,525,396			3,271,117
Allowance for Credit Losses Individually Evaluated for Impairment	0			0
Allowance for Credit Losses Collectively Evaluated for Impairment	52,103			25,424
Total Allowance for Credit Losses	52,939			26,557
Consumer loans | PCD
Financing Receivable, Allowance for Credit Loss [Line Items]
PCD	23,358			22,201
Total Allowance for Credit Losses	836			1,133
Office, retail, and industrial | Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, Individually Evaluated for Impairment	25,165			24,820
Loans, Collectively Evaluated for Impairment	1,956,597			1,795,557
Loans	2,020,318			1,848,718
Allowance for Credit Losses Individually Evaluated for Impairment	885			578
Allowance for Credit Losses Collectively Evaluated for Impairment	14,964			6,899
Total Allowance for Credit Losses	24,441	25,856		7,580	7,495	7,679	7,900
Office, retail, and industrial | Commercial real estate | PCD
Financing Receivable, Allowance for Credit Loss [Line Items]
PCD	38,556			28,341
Total Allowance for Credit Losses	8,592			103
Multi-family | Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, Individually Evaluated for Impairment	1,785			1,995
Loans, Collectively Evaluated for Impairment	871,545			851,857
Loans	874,861			856,553
Allowance for Credit Losses Individually Evaluated for Impairment	0			0
Allowance for Credit Losses Collectively Evaluated for Impairment	5,126			2,854
Total Allowance for Credit Losses	5,311	3,689		2,950	2,159	2,216	2,464
Multi-family | Commercial real estate | PCD
Financing Receivable, Allowance for Credit Loss [Line Items]
PCD	1,531			2,701
Total Allowance for Credit Losses	185			96
Construction | Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, Individually Evaluated for Impairment	18,611			123
Loans, Collectively Evaluated for Impairment	646,355			581,747
Loans	687,063			593,093
Allowance for Credit Losses Individually Evaluated for Impairment	0			0
Allowance for Credit Losses Collectively Evaluated for Impairment	4,624			1,681
Total Allowance for Credit Losses	11,522	11,297		1,697	1,862	2,131	2,173
Construction | Commercial real estate | PCD
Financing Receivable, Allowance for Credit Loss [Line Items]
PCD	22,097			11,223
Total Allowance for Credit Losses	6,898			16
Other commercial real estate | Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, Individually Evaluated for Impairment	3,806			3,241
Loans, Collectively Evaluated for Impairment	1,410,080			1,323,635
Loans	1,475,937			1,383,708
Allowance for Credit Losses Individually Evaluated for Impairment	44			0
Allowance for Credit Losses Collectively Evaluated for Impairment	10,332			4,867
Total Allowance for Credit Losses	21,862	18,554		6,408	4,997	4,930	4,934
Other commercial real estate | Commercial real estate | PCD
Financing Receivable, Allowance for Credit Loss [Line Items]
PCD	62,051			56,832
Total Allowance for Credit Losses	11,486			1,541
Allowance for unfunded commitments
Financing Receivable, Allowance for Credit Loss [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	7,625			1,200
Total Allowance for Credit Losses	7,625	$ 6,753		1,200	$ 1,200	$ 1,200	$ 1,200
Allowance for unfunded commitments | PCD
Financing Receivable, Allowance for Credit Loss [Line Items]
PCD	0			0
Total Allowance for Credit Losses	$ 0			$ 0

Past Due Loans, Allowance For_6

Past Due Loans, Allowance For Credit Losses, Non-Accrual Loans, and TDRS - Collateral-dependent Loans and Non-accrual Loans With No Related Allowance by Class (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	$ 139,160	$ 82,269
Non-accrual Loans With No Related Allowance	61,383
Real Estate
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	122,964
Blanket Lien
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	49,954
Equipment
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	3,169
Commercial Industrial And Agricultural | Commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	28,349	29,995
Non-accrual Loans With No Related Allowance	6,338
Commercial Industrial And Agricultural | Commercial and industrial | Real Estate
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	6,870
Commercial Industrial And Agricultural | Commercial and industrial | Blanket Lien
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	45,235
Commercial Industrial And Agricultural | Commercial and industrial | Equipment
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	3,169
Commercial Industrial And Agricultural | Agricultural
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	8,494	5,954
Non-accrual Loans With No Related Allowance	4,485
Commercial Industrial And Agricultural | Agricultural | Real Estate
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	3,417
Commercial Industrial And Agricultural | Agricultural | Blanket Lien
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	4,719
Commercial Industrial And Agricultural | Agricultural | Equipment
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	0
Commercial Real Estate
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	84,690	33,435
Non-accrual Loans With No Related Allowance	49,910
Commercial Real Estate | Real Estate
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	109,768
Commercial Real Estate | Blanket Lien
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	0
Commercial Real Estate | Equipment
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	0
Commercial Real Estate | Office, retail, and industrial
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	35,915	25,857
Non-accrual Loans With No Related Allowance	17,293
Commercial Real Estate | Office, retail, and industrial | Real Estate
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	44,538
Commercial Real Estate | Office, retail, and industrial | Blanket Lien
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	0
Commercial Real Estate | Office, retail, and industrial | Equipment
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	0
Commercial Real Estate | Multi-family
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	3,121	2,697
Non-accrual Loans With No Related Allowance	1,785
Commercial Real Estate | Multi-family | Real Estate
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	2,606
Commercial Real Estate | Multi-family | Blanket Lien
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	0
Commercial Real Estate | Multi-family | Equipment
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	0
Commercial Real Estate | Construction
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	27,282	152
Non-accrual Loans With No Related Allowance	19,043
Commercial Real Estate | Construction | Real Estate
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	28,779
Commercial Real Estate | Construction | Blanket Lien
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	0
Commercial Real Estate | Construction | Equipment
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	0
Commercial Real Estate | Other commercial real estate
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	18,372	4,729
Non-accrual Loans With No Related Allowance	11,789
Commercial Real Estate | Other commercial real estate | Real Estate
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	33,845
Commercial Real Estate | Other commercial real estate | Blanket Lien
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	0
Commercial Real Estate | Other commercial real estate | Equipment
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	0
Total corporate loans
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	121,533	69,384
Non-accrual Loans With No Related Allowance	60,733
Total corporate loans | Real Estate
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	120,055
Total corporate loans | Blanket Lien
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	49,954
Total corporate loans | Equipment
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	3,169
Consumer loans
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	17,627	12,885
Non-accrual Loans With No Related Allowance	650
Consumer loans | Real Estate
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	2,909
Consumer loans | Blanket Lien
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	0
Consumer loans | Equipment
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	0
Consumer loans | Home equity
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	9,129	8,443
Non-accrual Loans With No Related Allowance	123
Consumer loans | Home equity | Real Estate
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	244
Consumer loans | Home equity | Blanket Lien
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	0
Consumer loans | Home equity | Equipment
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	0
Consumer loans | 1-4 family mortgages
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	8,498	4,442
Non-accrual Loans With No Related Allowance	527
Consumer loans | 1-4 family mortgages | Real Estate
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	2,665
Consumer loans | 1-4 family mortgages | Blanket Lien
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	0
Consumer loans | 1-4 family mortgages | Equipment
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	0
Consumer loans | Installment
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	0	$ 0
Non-accrual Loans With No Related Allowance	0
Consumer loans | Installment | Real Estate
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	0
Consumer loans | Installment | Blanket Lien
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	0
Consumer loans | Installment | Equipment
Financing Receivable, Nonaccrual [Line Items]
Non-accrual	$ 0

Past Due Loans, Allowance For_7

Past Due Loans, Allowance For Credit Losses, Non-Accrual Loans, and TDRS - Impaired Loans Individually Evaluated by Class (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans with No Specific Reserve	$ 48,984		$ 48,984		$ 34,244
Recorded Investment in Loans with a Specific Reserve	25,596		25,596		30,077
Unpaid Principal Balance	103,437		103,437		104,472
Specific Allowance	5,734		5,734		3,992
Interest income on non-accrual loans	110	$ 69	388	$ 148
Commercial Industrial And Agricultural | Commercial and industrial
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans with No Specific Reserve	4,884		4,884		12,885
Recorded Investment in Loans with a Specific Reserve	12,170		12,170		15,516
Unpaid Principal Balance	37,153		37,153		52,559
Specific Allowance	3,018		3,018		2,456
Commercial Industrial And Agricultural | Agricultural
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans with No Specific Reserve	4,485		4,485		1,889
Recorded Investment in Loans with a Specific Reserve	3,651		3,651		3,852
Unpaid Principal Balance	13,032		13,032		9,293
Specific Allowance	1,787		1,787		958
Commercial real estate
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans with No Specific Reserve	39,592		39,592		19,470
Recorded Investment in Loans with a Specific Reserve	9,775		9,775		10,709
Unpaid Principal Balance	53,229		53,229		42,620
Specific Allowance	929		929		578
Commercial real estate | Office, retail, and industrial
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans with No Specific Reserve	15,839		15,839		14,111
Recorded Investment in Loans with a Specific Reserve	9,326		9,326		10,709
Unpaid Principal Balance	28,730		28,730		37,007
Specific Allowance	885		885		578
Commercial real estate | Multi-family
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans with No Specific Reserve	1,785		1,785		1,995
Recorded Investment in Loans with a Specific Reserve	0		0		0
Unpaid Principal Balance	1,785		1,785		1,995
Specific Allowance	0		0		0
Commercial real estate | Construction
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans with No Specific Reserve	18,611		18,611		123
Recorded Investment in Loans with a Specific Reserve	0		0		0
Unpaid Principal Balance	18,611		18,611		123
Specific Allowance	0		0		0
Commercial real estate | Other commercial real estate
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans with No Specific Reserve	3,357		3,357		3,241
Recorded Investment in Loans with a Specific Reserve	449		449		0
Unpaid Principal Balance	4,103		4,103		3,495
Specific Allowance	44		44		0
Total corporate loans
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans with No Specific Reserve	48,961		48,961		34,244
Recorded Investment in Loans with a Specific Reserve	25,596		25,596		30,077
Unpaid Principal Balance	103,414		103,414		104,472
Specific Allowance	5,734		5,734		3,992
Consumer loans
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans with No Specific Reserve	23		23		0
Recorded Investment in Loans with a Specific Reserve	0		0		0
Unpaid Principal Balance	23		23		0
Specific Allowance	$ 0		$ 0		$ 0

Past Due Loans, Allowance For_8

Past Due Loans, Allowance For Credit Losses, Non-Accrual Loans, and TDRS - Corporate Loans Portfolio Segment By Origination Year (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving loans converted to term loans	$ 16,800	$ 23,800
Corporate Loan | Commercial Industrial And Agricultural
Financing Receivable, Credit Quality Indicator [Line Items]
2020	465,536	465,536
2019	899,959	899,959
2018	985,321	985,321
2017	550,918	550,918
2016	268,667	268,667
Prior	509,496	509,496
Revolving Loans	1,490,783	1,490,783
Total	5,170,680	5,170,680
Corporate Loan | Commercial Industrial And Agricultural | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020	461,644	461,644
2019	887,292	887,292
2018	924,776	924,776
2017	519,875	519,875
2016	238,751	238,751
Prior	469,442	469,442
Revolving Loans	1,364,316	1,364,316
Total	4,866,096	4,866,096
Corporate Loan | Commercial Industrial And Agricultural | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2020	3,508	3,508
2019	6,520	6,520
2018	31,435	31,435
2017	4,676	4,676
2016	8,527	8,527
Prior	17,568	17,568
Revolving Loans	80,597	80,597
Total	152,831	152,831
Corporate Loan | Commercial Industrial And Agricultural | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2020	384	384
2019	4,376	4,376
2018	26,729	26,729
2017	17,862	17,862
2016	16,583	16,583
Prior	15,804	15,804
Revolving Loans	33,172	33,172
Total	114,910	114,910
Corporate Loan | Commercial Industrial And Agricultural | Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0	0
2019	1,771	1,771
2018	2,381	2,381
2017	8,505	8,505
2016	4,806	4,806
Prior	6,682	6,682
Revolving Loans	12,698	12,698
Total	36,843	36,843
Corporate Loan | Commercial Industrial And Agricultural | Net Loan Charge Offs
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0	0
2019	250	250
2018	946	946
2017	1,058	1,058
2016	617	617
Prior	1,853	1,853
Revolving Loans	6,036	6,036
Total	10,760	10,760
Corporate Loan | Office, retail, and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
2020	96,464	96,464
2019	267,134	267,134
2018	229,350	229,350
2017	353,549	353,549
2016	329,621	329,621
Prior	738,709	738,709
Revolving Loans	5,491	5,491
Total	2,020,318	2,020,318
Corporate Loan | Office, retail, and industrial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020	95,291	95,291
2019	266,479	266,479
2018	225,938	225,938
2017	348,121	348,121
2016	302,430	302,430
Prior	677,880	677,880
Revolving Loans	5,491	5,491
Total	1,921,630	1,921,630
Corporate Loan | Office, retail, and industrial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2020	1,173	1,173
2019	655	655
2018	3,280	3,280
2017	5,091	5,091
2016	15,439	15,439
Prior	12,914	12,914
Revolving Loans	0	0
Total	38,552	38,552
Corporate Loan | Office, retail, and industrial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0	0
2019	0	0
2018	0	0
2017	337	337
2016	1,514	1,514
Prior	22,370	22,370
Revolving Loans	0	0
Total	24,221	24,221
Corporate Loan | Office, retail, and industrial | Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0	0
2019	0	0
2018	132	132
2017	0	0
2016	10,238	10,238
Prior	25,545	25,545
Revolving Loans	0	0
Total	35,915	35,915
Corporate Loan | Office, retail, and industrial | Net Loan Charge Offs
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0	0
2019	333	333
2018	156	156
2017	0	0
2016	1,628	1,628
Prior	1,298	1,298
Revolving Loans	0	0
Total	3,415	3,415
Corporate Loan | Multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
2020	125,328	125,328
2019	174,802	174,802
2018	85,178	85,178
2017	103,358	103,358
2016	102,441	102,441
Prior	247,643	247,643
Revolving Loans	36,111	36,111
Total	874,861	874,861
Corporate Loan | Multi-family | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020	125,328	125,328
2019	174,802	174,802
2018	84,791	84,791
2017	101,492	101,492
2016	101,846	101,846
Prior	239,713	239,713
Revolving Loans	36,111	36,111
Total	864,083	864,083
Corporate Loan | Multi-family | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0	0
2019	0	0
2018	0	0
2017	0	0
2016	358	358
Prior	1,416	1,416
Revolving Loans	0	0
Total	1,774	1,774
Corporate Loan | Multi-family | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0	0
2019	0	0
2018	387	387
2017	81	81
2016	0	0
Prior	5,415	5,415
Revolving Loans	0	0
Total	5,883	5,883
Corporate Loan | Multi-family | Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0	0
2019	0	0
2018	0	0
2017	1,785	1,785
2016	237	237
Prior	1,099	1,099
Revolving Loans	0	0
Total	3,121	3,121
Corporate Loan | Multi-family | Net Loan Charge Offs
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0	0
2019	3	3
2018	0	0
2017	1	1
2016	0	0
Prior	10	10
Revolving Loans	0	0
Total	14	14
Corporate Loan | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
2020	33,890	33,890
2019	151,849	151,849
2018	171,525	171,525
2017	104,813	104,813
2016	85,222	85,222
Prior	105,057	105,057
Revolving Loans	34,707	34,707
Total	687,063	687,063
Corporate Loan | Construction | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020	33,890	33,890
2019	151,849	151,849
2018	171,480	171,480
2017	101,781	101,781
2016	71,001	71,001
Prior	70,950	70,950
Revolving Loans	33,016	33,016
Total	633,967	633,967
Corporate Loan | Construction | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0	0
2019	0	0
2018	45	45
2017	3,032	3,032
2016	14,221	14,221
Prior	1,228	1,228
Revolving Loans	0	0
Total	18,526	18,526
Corporate Loan | Construction | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0	0
2019	0	0
2018	0	0
2017	0	0
2016	0	0
Prior	7,288	7,288
Revolving Loans	0	0
Total	7,288	7,288
Corporate Loan | Construction | Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0	0
2019	0	0
2018	0	0
2017	0	0
2016	0	0
Prior	25,591	25,591
Revolving Loans	1,691	1,691
Total	27,282	27,282
Corporate Loan | Construction | Net Loan Charge Offs
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0	0
2019	118	118
2018	0	0
2017	798	798
2016	0	0
Prior	1,690	1,690
Revolving Loans	0	0
Total	2,606	2,606
Corporate Loan | Other commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
2020	61,056	61,056
2019	199,300	199,300
2018	277,789	277,789
2017	238,501	238,501
2016	141,770	141,770
Prior	529,875	529,875
Revolving Loans	27,646	27,646
Total	1,475,937	1,475,937
Corporate Loan | Other commercial real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020	61,056	61,056
2019	195,768	195,768
2018	269,526	269,526
2017	226,064	226,064
2016	125,249	125,249
Prior	466,436	466,436
Revolving Loans	27,553	27,553
Total	1,371,652	1,371,652
Corporate Loan | Other commercial real estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0	0
2019	3,532	3,532
2018	7,589	7,589
2017	6,887	6,887
2016	11,219	11,219
Prior	15,463	15,463
Revolving Loans	0	0
Total	44,690	44,690
Corporate Loan | Other commercial real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0	0
2019	0	0
2018	0	0
2017	1,400	1,400
2016	4,224	4,224
Prior	35,599	35,599
Revolving Loans	0	0
Total	41,223	41,223
Corporate Loan | Other commercial real estate | Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0	0
2019	0	0
2018	674	674
2017	4,150	4,150
2016	1,078	1,078
Prior	12,377	12,377
Revolving Loans	93	93
Total	18,372	18,372
Corporate Loan | Other commercial real estate | Net Loan Charge Offs
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0	0
2019	38	38
2018	1	1
2017	0	0
2016	183	183
Prior	(39)	(39)
Revolving Loans	0	0
Total	183	183
Consumer loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total			$ 3,271,117
Consumer loans | Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
2020	8,231	8,231
2019	48,718	48,718
2018	27,908	27,908
2017	14,073	14,073
2016	12,360	12,360
Prior	63,854	63,854
Revolving Loans	717,723	717,723
Total	892,867	892,867	851,454
Consumer loans | Home equity | Performing Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2020	8,231	8,231
2019	48,696	48,696
2018	27,783	27,783
2017	13,809	13,809
2016	11,878	11,878
Prior	57,053	57,053
Revolving Loans	716,288	716,288
Total	883,738	883,738
Consumer loans | Home equity | Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0	0
2019	22	22
2018	125	125
2017	264	264
2016	482	482
Prior	6,801	6,801
Revolving Loans	1,435	1,435
Total	9,129	9,129
Consumer loans | Home equity | Net Loan Charge Offs
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0	0
2019	0	0
2018	1	1
2017	0	0
2016	1	1
Prior	42	42
Revolving Loans	(14)	(14)
Total	30	30
Consumer loans | 1-4 Family Mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
2020	597,506	597,506
2019	676,898	676,898
2018	312,322	312,322
2017	158,313	158,313
2016	181,975	181,975
Prior	248,308	248,308
Revolving Loans	0	0
Total	2,175,322	2,175,322
Consumer loans | 1-4 Family Mortgages | Performing Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2020	597,506	597,506
2019	676,898	676,898
2018	311,884	311,884
2017	158,230	158,230
2016	181,912	181,912
Prior	240,394	240,394
Revolving Loans	0	0
Total	2,166,824	2,166,824
Consumer loans | 1-4 Family Mortgages | Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0	0
2019	0	0
2018	438	438
2017	83	83
2016	63	63
Prior	7,914	7,914
Revolving Loans	0	0
Total	8,498	8,498
Consumer loans | 1-4 Family Mortgages | Net Loan Charge Offs
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0	0
2019	0	0
2018	4	4
2017	0	0
2016	7	7
Prior	735	735
Revolving Loans	0	0
Total	746	746
Consumer loans | Installment
Financing Receivable, Credit Quality Indicator [Line Items]
2020	59,971	59,971
2019	185,919	185,919
2018	107,220	107,220
2017	45,108	45,108
2016	17,563	17,563
Prior	20,662	20,662
Revolving Loans	20,764	20,764
Total	457,207	457,207	$ 492,585
Consumer loans | Installment | Performing Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2020	59,971	59,971
2019	185,919	185,919
2018	107,220	107,220
2017	45,108	45,108
2016	17,563	17,563
Prior	20,662	20,662
Revolving Loans	20,764	20,764
Total	457,207	457,207
Consumer loans | Installment | Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0	0
2019	0	0
2018	0	0
2017	0	0
2016	0	0
Prior	0	0
Revolving Loans	0	0
Total	0	0
Consumer loans | Installment | Net Loan Charge Offs
Financing Receivable, Credit Quality Indicator [Line Items]
2020	44	44
2019	3,757	3,757
2018	2,200	2,200
2017	775	775
2016	85	85
Prior	393	393
Revolving Loans	29	29
Total	$ 7,283	$ 7,283

Past Due Loans, Allowance For_9

Past Due Loans, Allowance For Credit Losses, Impaired Loans, and TDRS - Credit Quality Indicators by Class (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Commercial Industrial And Agricultural | Commercial and industrial
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		$ 4,481,525
Commercial Industrial And Agricultural | Commercial and industrial | Pass
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		4,324,709
Commercial Industrial And Agricultural | Commercial and industrial | Special Mention
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		47,665
Commercial Industrial And Agricultural | Commercial and industrial | Substandard
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		79,156
Commercial Industrial And Agricultural | Commercial and industrial | Non-accrual
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		29,995
Commercial Industrial And Agricultural | Agricultural
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		405,616
Commercial Industrial And Agricultural | Agricultural | Pass
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		350,827
Commercial Industrial And Agricultural | Agricultural | Special Mention
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		32,764
Commercial Industrial And Agricultural | Agricultural | Substandard
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		16,071
Commercial Industrial And Agricultural | Agricultural | Non-accrual
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		5,954
Commercial Real Estate
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		4,682,072
Commercial Real Estate | Pass
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		4,446,552
Commercial Real Estate | Special Mention
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		108,274
Commercial Real Estate | Substandard
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		93,811
Commercial Real Estate | Non-accrual
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		33,435
Commercial Real Estate | Office, retail, and industrial
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		1,848,718
Commercial Real Estate | Office, retail, and industrial | Pass
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		1,747,287
Commercial Real Estate | Office, retail, and industrial | Special Mention
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		42,230
Commercial Real Estate | Office, retail, and industrial | Substandard
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		33,344
Commercial Real Estate | Office, retail, and industrial | Non-accrual
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		25,857
Commercial Real Estate | Multi-family
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		856,553
Commercial Real Estate | Multi-family | Pass
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		839,615
Commercial Real Estate | Multi-family | Special Mention
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		8,279
Commercial Real Estate | Multi-family | Substandard
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		5,962
Commercial Real Estate | Multi-family | Non-accrual
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		2,697
Commercial Real Estate | Construction
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		593,093
Commercial Real Estate | Construction | Pass
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		564,495
Commercial Real Estate | Construction | Special Mention
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		17,977
Commercial Real Estate | Construction | Substandard
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		10,469
Commercial Real Estate | Construction | Non-accrual
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		152
Commercial Real Estate | Other commercial real estate
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		1,383,708
Commercial Real Estate | Other commercial real estate | Pass
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		1,295,155
Commercial Real Estate | Other commercial real estate | Special Mention
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		39,788
Commercial Real Estate | Other commercial real estate | Substandard
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		44,036
Commercial Real Estate | Other commercial real estate | Non-accrual
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		4,729
Total corporate loans
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		9,569,213
Total corporate loans | Pass
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		9,122,088
Total corporate loans | Special Mention
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		188,703
Total corporate loans | Substandard
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		189,038
Total corporate loans | Non-accrual
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		69,384
Consumer loans
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		3,271,117
Consumer loans | Performing
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		3,258,232
Consumer loans | Nonperforming
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		12,885
Consumer loans | Home equity
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable	$ 892,867	851,454
Consumer loans | 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]
Financing receivable		843,011
Consumer loans | Home equity | Nonperforming
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		8,443
Consumer loans | 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]
Financing receivable		1,927,078
Consumer loans | 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]
Financing receivable		1,922,636
Consumer loans | 1-4 family mortgages | Nonperforming
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		4,442
Consumer loans | Installment
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable	$ 457,207	492,585
Consumer loans | Installment | Performing
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		492,585
Consumer loans | Installment | Nonperforming
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - Credit Quality Indicators by Class, Excluding Covered Loans (Continued) [Line Items]
Financing receivable		$ 0

Past Due Loans, Allowance Fo_10

Past Due Loans, Allowance For Credit Losses, Non-Accrual Loans, and TDRS - TDRs By Class (Details) - USD ($) $ in Thousands		6 Months Ended	12 Months Ended
		Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing TDRs		$ 1,201	$ 1,233
Non-accrual	[1]	12,093	20,514
Total		13,294	21,747	$ 9,282
Specific reserves related to TDRs		2,400	2,200
Commercial Industrial And Agricultural | Commercial and industrial
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing TDRs		188	227
Non-accrual	[1]	9,336	16,420
Total		9,524	16,647
Commercial Industrial And Agricultural | Agricultural
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing TDRs		0	0
Non-accrual	[1]	0	0
Total		0	0
Commercial real estate
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing TDRs		358	333
Non-accrual	[1]	2,340	3,600
Total		2,698	3,933
Commercial real estate | Office, retail, and industrial
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing TDRs		0	0
Non-accrual	[1]	2,340	3,600
Total		2,340	3,600
Commercial real estate | Multi-family
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing TDRs		160	163
Non-accrual	[1]	0	0
Total		160	163
Commercial real estate | Construction
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing TDRs		0	0
Non-accrual	[1]	0	0
Total		0	0
Commercial real estate | Other commercial real estate
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing TDRs		198	170
Non-accrual	[1]	0	0
Total		198	170
Total corporate loans
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing TDRs		546	560
Non-accrual	[1]	11,676	20,020
Total		12,222	20,580
Consumer loans
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing TDRs		655	673
Non-accrual	[1]	417	494
Total		1,072	1,167
Consumer loans | Home equity
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing TDRs		31	36
Non-accrual	[1]	179	240
Total		210	276
Consumer loans | 1-4 family mortgages
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing TDRs		624	637
Non-accrual	[1]	238	0
Total		862	637
Consumer loans | Installment
Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Details) - TDRs By Class [Line Items]
Accruing TDRs		0	0
Non-accrual	[1]	0	254
Total		$ 0	$ 254
[1]	These TDRs are included in non-accrual loans in the preceding tables.

Past Due Loans, Allowance Fo_11

Past Due Loans, Allowance For Credit Losses, Non-Accrual Loans, and TDRS - TDR Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Troubled Debt Restructuring Activity Rollforward [Roll Forward]
Beginning balance			$ 21,747
Ending balance	$ 13,294	$ 9,282	13,294	$ 9,282
Material commitments to lend additional funds to borrowers with TDRs	813		813		$ 530
Accruing
Troubled Debt Restructuring Activity Rollforward [Roll Forward]
Beginning balance	1,216	1,844	1,233	1,866
Additions	0	0	0	12
Net payments	(15)	(20)	(32)	(54)
Net transfers to non-accrual	0	(383)	0	(383)
Ending balance	1,201	1,441	1,201	1,441
Non-accrual
Troubled Debt Restructuring Activity Rollforward [Roll Forward]
Beginning balance	17,917	9,375	20,514	6,612
Additions	0	0	934	0
Net payments	(2,595)	(1,447)	(3,253)	1,474
Charge-offs	(3,229)	(470)	(6,102)	(628)
Net transfers from accruing	0	383	0	383
Ending balance	$ 12,093	$ 7,841	$ 12,093	$ 7,841

Lease Obligations - Narrative (

Lease Obligations - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)		Dec. 31, 2016USD ($)branch	Jun. 30, 2020USD ($)	Mar. 31, 2020USD ($)	Dec. 31, 2019USD ($)		Jun. 30, 2019USD ($)	Mar. 31, 2019USD ($)
Leases [Abstract]
Operating lease, weighted average remaining lease term				10 years 8 months 12 days
Operating lease, weighted average discount rate (as a percent)				2.96%
Operating lease, right-of-use asset				$ 141,200
Lessee, Lease, Description [Line Items]
Sale and leaseback transaction, number of branches sold | branch			55
Sale and leaseback transaction, pre-tax gain	$ 65,500		$ 88,000
Sale and leaseback transaction related expenses			$ 5,500
Cumulative effect adjustment	2,054,998			2,656,211	$ 2,435,707	$ 2,370,793		$ 2,300,573	$ 2,159,471
Cumulative Effect, Period Of Adoption, Adjustment
Lessee, Lease, Description [Line Items]
Cumulative effect adjustment	47,257	[1]				(26,821)	[2]
Retained Earnings
Lessee, Lease, Description [Line Items]
Cumulative effect adjustment	1,192,767			$ 1,359,407	$ 1,357,395	1,380,612		$ 1,304,756	$ 1,273,245
Retained Earnings | Cumulative Effect, Period Of Adoption, Adjustment
Lessee, Lease, Description [Line Items]
Cumulative effect adjustment	$ 47,257	[1]				$ (26,821)	[2]
[1]	As a result of accounting guidance adopted in the first quarter of 2019, the remaining deferred gain on a sale-leaseback transaction was recognized as a cumulative-effect adjustment to retained earnings as of January 1, 2019.
[2]	As a result of accounting guidance adopted in the first quarter of 2020, a portion of the increase in allowance for credit losses, net of tax, was recognized as a cumulative-effect adjustment to retained earnings as of January 1, 2020. For further discussion of this guidance, see Note 2, "Recent Accounting Pronouncements and Other Guidance."

Lease Obligations - Schedule of

Lease Obligations - Schedule of Lease Liability (Details) $ in Thousands	Jun. 30, 2020USD ($)
Leases [Abstract]
2020	$ 9,466
2021	18,785
2022	18,711
2023	18,811
2024	18,530
2025 and thereafter	105,995
Total minimum lease payments	190,298
Discount	(28,752)	[1]
Lease liability	$ 161,546	[2]
[1]	Represents the net present value adjustment related to minimum lease payments.
[2]	Included in accrued interest payable and other liabilities in the Consolidated Statements of Financial Condition.

Lease Obligations - Schedule _2

Lease Obligations - Schedule of Net Operating Lease Expense (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Leases [Abstract]
Lease expense charged to operations		$ 4,839	$ 4,426	$ 9,514	$ 8,486
Rental income from premises leased to others	[1]	(183)	(165)	(398)	(322)
Net operating lease expense		$ 4,656	$ 4,261	$ 9,116	$ 8,164
[1]	Included as reductions to net occupancy and equipment expense in the Condensed Consolidated Statements of Income.

Borrowed Funds - Summary of Bor

Borrowed Funds - Summary of Borrowed Funds (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Debt Disclosure [Abstract]
Securities sold under agreements to repurchase	$ 130,667	$ 103,515
Federal funds purchased	200,000	160,000
FHLB advances	1,974,528	1,395,243
Total borrowed funds	$ 2,305,195	$ 1,658,758

Borrowed Funds - Narrative (Det

Borrowed Funds - Narrative (Details) - USD ($)	Sep. 27, 2016	Jun. 30, 2020
Short-term Debt [Line Items]
Line of credit maximum borrowing capacity	$ 50,000,000
Commitment fee (as a percent)	0.35%
Amount outstanding under facility		$ 0
One-month LIBOR plus 1.75%
Short-term Debt [Line Items]
Line of credit interest rate spread (as a percent)	1.75%
Federal Home Loan Bank Advances | Minimum
Short-term Debt [Line Items]
FHLB fixed interest rate (as a percent)		0.00%
Federal Home Loan Bank Advances | Maximum
Short-term Debt [Line Items]
FHLB fixed interest rate (as a percent)		1.97%

Borrowed Funds - Short-Term Cre

Borrowed Funds - Short-Term Credit Lines Available for Use (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
FRB's Discount Window Primary Credit Program
Line of Credit Facility [Line Items]
Credit lines available for use	$ 803,068	$ 874,256
Available federal funds lines
Line of Credit Facility [Line Items]
Credit lines available for use	814,000	718,000
Correspondent bank line of credit
Line of Credit Facility [Line Items]
Credit lines available for use	$ 50,000	$ 50,000

Material Transactions Affecti_2

Material Transactions Affecting Stockholders' Equity (Details) - USD ($)	Mar. 09, 2020	Jun. 30, 2020	Jun. 30, 2020	Jun. 30, 2019	Mar. 19, 2020	Feb. 26, 2020	Feb. 25, 2020
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)		231,000	231,000
Preferred stock issued		$ 221,312,000	$ 221,312,000
Net proceeds from the issuance of preferred stock		$ 221,300,000	$ 221,312,000	$ 0
Stock repurchase program, authorized amount					$ 180,000,000	$ 200,000,000	$ 180,000,000
Common stock repurchased (in shares)		1,200,000
Total cost of common stock repurchased		$ 22,600,000
Depository Series A Shares
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)		4,300,000	4,300,000
Preferred stock, conversion rate (as a percent)		2.50%
Preferred stock, fixed rate (as a percent)		7.00%
Depository Series C Shares
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)		4,900,000	4,900,000
Preferred stock, conversion rate (as a percent)		2.50%
Depository Shares
Class of Stock [Line Items]
Preferred stock issued		$ 230,500,000
Bankmanagers Corporation
Class of Stock [Line Items]
Acquisitions, net of issuance costs (in shares)	4,930,231
Shares issued (in dollars per share)	$ 14.58

Earnings Per Common Share (Deta

Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share [Abstract]
Net income	$ 19,064	$ 47,014	$ 38,670	$ 93,072
Preferred dividends	(1,037)	0	(1,037)	0
Net income applicable to unvested restricted shares	(187)	(389)	(379)	(792)
Net income applicable to common shares	$ 17,840	$ 46,625	$ 37,254	$ 92,280
Weighted-average common shares outstanding:
Weighted-average common shares outstanding (basic) (in Shares)	113,145	108,467	111,533	107,126
Dilutive effect of common stock equivalents (in Shares)	191	0	339	0
Weighted-average diluted common shares outstanding (in Shares)	113,336	108,467	111,872	107,126
Basic EPS (in dollars per share)	$ 0.16	$ 0.43	$ 0.33	$ 0.86
Diluted EPS (in dollars per share)	$ 0.16	$ 0.43	$ 0.33	$ 0.86

Derivative Instruments and He_3

Derivative Instruments and Hedging Activities - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Apr. 20, 2020	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Amount of variable rate loans hedged using interest rate swaps	$ 430,000		$ 430,000
Amount hedged of borrowed funds using forward starting interest rate swaps	1,600,000		1,600,000		$ 1,100,000
Amount to be hedged of borrowed funds using forward starting interest rate swaps	$ 485,000		$ 485,000
Weighted-average interest rate to be paid (as a percent)	1.86%		1.86%
Interest rate cash flow hedge loss to be reclassified during next 12 months, net	$ 4,300		$ 4,300
Capital market products income	$ 694	$ 2,154	$ 5,416	$ 3,433
Portion of fair value of outstanding interest rate swaps covered by collateral agreements (percent)	100.00%		100.00%			100.00%

Derivative Instruments and He_4

Derivative Instruments and Hedging Activities - Cash Flow Hedges (Details) - Cash Flow Hedging - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
		Mar. 31, 2020	Jun. 30, 2020	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross notional amount outstanding			$ 2,035,000	$ 1,905,000
Derivative asset fair value in other assets	[1]		6,053	727
Derivative liability fair value in other liabilities	[1]		$ 198	$ 119
Weighted-average interest rate received			0.96%	1.88%
Weighted-average interest rate paid			0.77%	1.74%
Weighted-average maturity (in years)		1 year 2 months 4 days	2 years 3 months 18 days
[1]	Certain cash flow hedges are transacted through a clearinghouse ("centrally cleared") and their change in fair value is settled by the counterparties to the transaction, which results in no fair value.

Derivative Instruments and He_5

Derivative Instruments and Hedging Activities - Other Derivative Instruments (Details) - Other Derivative Instruments - USD ($) $ in Thousands		Jun. 30, 2020	Dec. 31, 2019
Derivative [Line Items]
Gross notional amount outstanding		$ 4,589,018	$ 4,340,384
Derivative asset fair value in other assets	[1]	183,938	61,709
Derivative liability fair value in other liabilities	[1]	(55,026)	(18,416)
Fair value of derivative	[2]	$ 56,025	$ 18,856
[1]	Certain other derivative instruments are centrally cleared and their change in fair value is settled by the counterparties to the transaction, which results in no fair value.
[2]	This amount represents the fair value if credit risk related contingent features were triggered.

Derivative Instruments and He_6

Derivative Instruments and Hedging Activities - Cash Flow Hedge Accounting on AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gains (losses) recognized in other comprehensive income	$ (7,300)	$ 2,441	$ (17,340)	$ 3,899
Interest Income | Cash Flow Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gains (losses) recognized in other comprehensive income	5,951	5,944	27,955	9,297
Reclassification of gains (losses) included in net income	2,624	1,355	3,069	2,748
Interest Expense | Cash Flow Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gains (losses) recognized in other comprehensive income	(1,276)	(7,816)	(13,685)	(11,996)
Reclassification of gains (losses) included in net income	$ 0	$ (1,924)	$ 0	$ (3,948)

Derivative Instruments and He_7

Derivative Instruments and Hedging Activities - Effect Of Derivatives On Interest Income (Details) - Designated as Hedging Instrument - Cash Flow Hedging - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (loss) on derivative, net	$ 2,624	$ (569)	$ 3,069	$ (1,200)
Interest Income
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (loss) on derivative, net	2,624	1,355	3,069	2,748
Interest Expense
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (loss) on derivative, net	$ 0	$ (1,924)	$ 0	$ (3,948)

Derivative Instruments and He_8

Derivative Instruments and Hedging Activities - Offsetting Derivatives (Details) - USD ($) $ in Thousands		Jun. 30, 2020	Dec. 31, 2019
Assets
Gross amounts recognized		$ 189,991	$ 62,436
Less: amounts offset in the Consolidated Statements of Financial Condition		0	0
Net amount presented in the Consolidated Statements of Financial Condition	[1]	189,991	62,436
Offsetting derivative positions		(7,495)	(2,674)
Cash collateral pledged		0	0
Net credit exposure		182,496	59,762
Liabilities
Gross amounts recognized		54,828	18,535
Less: amounts offset in the Consolidated Statements of Financial Condition		0	0
Net amount presented in the Consolidated Statements of Financial Condition	[1]	54,828	18,535
Offsetting derivative positions		(7,495)	(2,674)
Cash collateral pledged		(48,430)	(15,861)
Net credit exposure		$ (1,097)	$ 0
[1]	Included in other assets or other liabilities in the Consolidated Statements of Financial Condition.

Commitments, Guarantees, and _3

Commitments, Guarantees, and Contingent Liabilities (Details) - USD ($) $ in Thousands		Jun. 30, 2020	Dec. 31, 2019
Other Commitments [Line Items]
Letters of credit		$ 100,827	$ 103,684
Commitments to extend credit
Other Commitments [Line Items]
Commercial, industrial, and agricultural		2,276,196	1,852,040
Commercial real estate		324,659	296,053
Home equity		578,920	576,956
Other commitments	[1]	251,716	251,093
Total commitments to extend credit		$ 3,431,491	$ 2,976,142
[1]	Other commitments includes installment and overdraft protection program commitments.

Fair Value - Recurring Fair Val

Fair Value - Recurring Fair Value Measurements (Details) - USD ($) $ in Thousands		Jun. 30, 2020		Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	[1]	Mar. 31, 2019	Dec. 31, 2018
Assets
Equity securities		$ 43,954			$ 42,136
Securities Available-for-Sale
Securities available-for-sale, at fair value		3,435,862			2,873,386
Mortgage servicing rights (MSRs)		4,464	[1]	$ 4,874	5,858	$ 5,831		$ 6,228	$ 6,730
U.S. treasury securities
Securities Available-for-Sale
Securities available-for-sale, at fair value		21,199			34,075
U.S. agency securities
Securities Available-for-Sale
Securities available-for-sale, at fair value		643,047			248,424
CMOs
Securities Available-for-Sale
Securities available-for-sale, at fair value		1,672,129			1,557,671
MBSs
Securities Available-for-Sale
Securities available-for-sale, at fair value		715,140			684,684
Municipal securities
Securities Available-for-Sale
Securities available-for-sale, at fair value		239,803			234,431
Corporate debt securities
Securities Available-for-Sale
Securities available-for-sale, at fair value		144,544			114,101
Recurring | Level 1
Assets
Equity securities		24,075			23,703
Securities Available-for-Sale
Securities available-for-sale, at fair value		21,199			34,075
Mortgage servicing rights (MSRs)	[2]	0			0
Derivative assets	[2]	0			0
Liabilities
Derivative liabilities	[3]	0			0
Recurring | Level 1 | U.S. treasury securities
Securities Available-for-Sale
Securities available-for-sale, at fair value		21,199			34,075
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 | Corporate debt securities
Securities Available-for-Sale
Securities available-for-sale, at fair value		0			0
Recurring | Level 2
Assets
Equity securities		14,879			13,400
Securities Available-for-Sale
Securities available-for-sale, at fair value		3,414,663			2,839,311
Mortgage servicing rights (MSRs)	[2]	0			0
Derivative assets	[2]	189,991			62,436
Liabilities
Derivative liabilities	[3]	54,828			18,535
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		643,047			248,424
Recurring | Level 2 | CMOs
Securities Available-for-Sale
Securities available-for-sale, at fair value		1,672,129			1,557,671
Recurring | Level 2 | MBSs
Securities Available-for-Sale
Securities available-for-sale, at fair value		715,140			684,684
Recurring | Level 2 | Municipal securities
Securities Available-for-Sale
Securities available-for-sale, at fair value		239,803			234,431
Recurring | Level 2 | Corporate debt securities
Securities Available-for-Sale
Securities available-for-sale, at fair value		144,544			114,101
Recurring | Level 3
Assets
Equity securities		0			0
Securities Available-for-Sale
Securities available-for-sale, at fair value		0			0
Mortgage servicing rights (MSRs)	[2]	4,464			5,858
Derivative assets	[2]	0			0
Liabilities
Derivative liabilities	[3]	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 | Corporate debt 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 assets in the Consolidated Statements of Financial Condition.
[3]	Included in other liabilities in the Consolidated Statements of Financial Condition.

Fair Value - Narrative (Details

Fair Value - Narrative (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Fair Value (Details) [Line Items]
Equity securities, at fair value	$ 43,954	$ 42,136
Total amount of loans being serviced for the benefit of others at the end of the period	$ 675,600	653,700
Minimum
Fair Value (Details) [Line Items]
Appraisal adjustment (percent)	0.00%
Maximum
Fair Value (Details) [Line Items]
Appraisal adjustment (percent)	15.00%
Recurring | Level 2
Fair Value (Details) [Line Items]
Equity securities, at fair value	$ 14,879	$ 13,400
Community Development Investments | Recurring | Level 2
Fair Value (Details) [Line Items]
Equity securities, at fair value	$ 5,000

Fair Value - Significant Unobse

Fair Value - Significant Unobservable Inputs Used In the Valuation of MSRs (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
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	7.60%	6.70%
Maturity (months)	16 months	18 months
Discount rate	9.40%	9.30%
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	14.90%	12.00%
Maturity (months)	88 months	94 months
Discount rate	12.00%	12.00%

Fair Value - Carrying Value of

Fair Value - Carrying Value of Mortgage Servicing Rights (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Servicing Asset at Fair Value, Amount [Roll Forward]
Beginning balance		$ 4,874	$ 6,228	$ 5,858	$ 6,730
New MSRs		745	204	901	457
Total gains (losses) included in earnings:
Changes in valuation inputs and assumptions	[1]	(750)	(389)	(1,658)	(989)
Other changes in fair value	[1],[2]	(405)	(212)	(637)	(367)
Ending balance	[3]	4,464	5,831	4,464	5,831
Contractually servicing fees earned	[1]	$ 394	$ 390	$ 797	$ 771
[1]	Included in mortgage banking income in the Condensed Consolidated Statements of Income and related to assets held as of June 30, 2020 and 2019.
[2]	Primarily represents changes in expected future cash flows due to payoffs and paydowns.
[3]	Included in other assets in the Consolidated Statements of Financial Condition.

Fair Value - Assets Measured At

Fair Value - Assets Measured At Fair Value On A Non-Recurring Basis (Details) - USD ($) $ in Thousands		Jun. 30, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
OREO		$ 9,947	$ 8,750
Nonrecurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring 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
Nonrecurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring 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
Nonrecurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent impaired loans	[1]	53,608	41,326
OREO	[2]	530	3,325
Loans held-for-sale	[3]	45,466	36,032
Assets held-for-sale	[4]	$ 5,180	$ 6,824
[1]	Includes non-accrual loans with charge-offs and non-accrual loans with a specific allowance 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 - Fair Value Measure

Fair Value - Fair Value Measurements of Other Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Assets
Cash and due from banks	$ 304,445	$ 214,894
Interest-bearing deposits in other banks	637,856	84,327
Securities held-to-maturity	19,628
FHLB and FRB stock	148,512	115,409
Loans	14,693,606	12,732,308
Investment in BOLI	299,649	296,351
Liabilities
Deposits	15,657,656	13,251,278
Borrowed funds	2,305,195	1,658,758
Senior and subordinated debt	234,358	233,948
Carrying Amount | Level 1
Assets
Cash and due from banks	304,445	214,894
Carrying Amount | Level 2
Assets
Interest-bearing deposits in other banks	637,856	84,327
Securities held-to-maturity	19,628	21,997
FHLB and FRB stock	148,512	115,409
Liabilities
Deposits	15,657,656	13,251,278
Borrowed funds	2,305,195	1,658,758
Senior and subordinated debt	234,358	233,948
Accrued interest payable	7,633	10,502
Carrying Amount | Level 3
Assets
Loans	14,693,606	12,733,200
Investment in BOLI	299,649	296,351
Accrued interest receivable	63,162	59,716
Fair Value | Level 1
Assets
Cash and due from banks	304,445	214,894
Fair Value | Level 2
Assets
Interest-bearing deposits in other banks	637,856	84,327
Securities held-to-maturity	19,676	21,234
FHLB and FRB stock	148,512	115,409
Liabilities
Deposits	15,667,051	13,247,871
Borrowed funds	2,305,195	1,658,758
Senior and subordinated debt	266,003	277,203
Accrued interest payable	7,633	10,502
Fair Value | Level 3
Assets
Loans	14,739,129	12,535,848
Investment in BOLI	299,649	296,351
Accrued interest receivable	$ 63,162	$ 59,716