Fulton Financial (FULT) 10-Q 7 Aug 20 2020 Q2 Quarterly report Financial data

Cover Page

Cover Page - shares	6 Months Ended
	Jun. 30, 2020	Jul. 31, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2020
Document Transition Report	false
Entity File Number	0-10587
Entity Registrant Name	FULTON FINANCIAL CORP
Entity Incorporation, State or Country Code	PA
Entity Tax Identification Number	23-2195389
Entity Address, Address Line One	One Penn Square
Entity Address, Address Line Two	P.O. Box 4887
Entity Address, City or Town	Lancaster,
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	17604
City Area Code	717
Local Phone Number	291-2411
Title of 12(b) Security	Common Stock, par value $2.50
Trading Symbol	FULT
Security Exchange Name	NASDAQ
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		162,073,000
Entity Central Index Key	0000700564
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
ASSETS
Cash and due from banks	$ 141,702	$ 132,283
Interest-bearing deposits with other banks	916,897	385,508
Cash and cash equivalents	1,058,599	517,791
FRB and FHLB stock	91,042	97,422
Loans held for sale	77,415	37,828
AFS, at estimated fair value	2,644,299	2,497,537
HTM, at amortized cost	330,514	369,841
Loans	18,704,722	16,837,526
Less: ACL - loans	(256,537)	(163,622)
Net Loans	18,448,185	16,673,904
Premises and equipment	239,596	240,046
Accrued interest receivable	73,720	60,898
Goodwill and intangible assets	535,039	535,303
Other assets	1,119,454	855,470
Total Assets	24,617,863	21,886,040
LIABILITIES
Noninterest-bearing	6,239,055	4,453,324
Interest-bearing	13,645,153	12,940,589
Total Deposits	19,884,208	17,393,913
Short-term borrowings	572,551	883,241
Accrued interest payable	11,571	8,834
Other liabilities	513,836	376,107
Federal Home Loan Bank advances and long-term debt	1,295,196	881,769
Total Liabilities	22,277,362	19,543,864
SHAREHOLDERS’ EQUITY
Common stock, $2.50 par value, 600 million shares authorized, 223.0 million shares issued in 2020 and 222.4 million issued in 2019	557,569	556,110
Additional paid-in capital	1,503,750	1,499,681
Retained earnings	1,059,160	1,079,391
Accumulated other comprehensive gain (loss)	51,439	(137)
Treasury stock, at cost, 61.1 million shares in 2020 and 58.2 million shares in 2019	(831,417)	(792,869)
Total Shareholders’ Equity	2,340,501	2,342,176
Total Liabilities and Shareholders’ Equity	$ 24,617,863	$ 21,886,040

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 2.50	$ 2.50
Common stock, shares authorized (in shares)	600,000,000	600,000,000
Common stock, shares issued (in shares)	223,000,000	222,400,000
Treasury stock, shares (in shares)	61,100,000	58,200,000

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
INTEREST INCOME
Loans, including fees	$ 158,928	$ 188,310	$ 334,452	$ 372,054
Investment securities:
Taxable	15,171	15,935	31,465	31,370
Tax-exempt	5,323	3,271	10,031	6,550
Loans held for sale	509	350	829	590
Other interest income	766	2,168	3,297	4,170
Total Interest Income	180,697	210,034	380,074	414,734
INTEREST EXPENSE
Deposits	17,118	32,548	43,558	62,237
Short-term borrowings	517	4,462	4,590	8,044
Long-term borrowings	10,307	8,480	18,426	16,594
Total Interest Expense	27,942	45,490	66,574	86,875
Net Interest Income	152,754	164,544	313,500	327,859
Provision for credit losses	19,570	5,025	63,600	10,125
Net Interest Income After Provision for Credit Losses	133,184	159,519	249,900	317,734
NON-INTEREST INCOME
Non-interest income before investment securities gains	52,917	54,139	107,515	100,825
Investment securities gains, net	3,005	176	3,051	241
Total Non-Interest Income	55,922	54,315	110,566	101,066
NON-INTEREST EXPENSE
Salaries and employee benefits	81,012	78,991	161,240	156,748
Net occupancy	13,144	14,469	26,630	27,378
Data processing and software	12,193	11,268	23,838	21,621
Other outside services	7,600	11,259	15,481	19,611
Amortization of tax credit investments	1,450	1,492	2,900	2,983
Intangible amortization	132	107	264	214
Prepayment penalty on FHLB advances	2,878	0	2,878	0
Professional fees	3,331	2,970	7,533	6,930
Marketing	3,193	3,299	6,611	6,641
FDIC insurance	2,133	2,755	4,941	5,364
Taxes, Other	3,088	2,480	5,891	4,482
Marketing	1,303	2,863	2,882	5,023
Other	11,549	12,215	24,469	24,997
Total Non-Interest Income	143,006	144,168	285,558	281,992
Income Before Income Taxes	46,100	69,666	74,909	136,808
Income taxes	6,542	9,887	9,303	20,366
Net Income	$ 39,559	$ 59,779	$ 65,606	$ 116,442
PER SHARE:
Net Income (Basic) (in dollars per share)	$ 0.24	$ 0.36	$ 0.40	$ 0.69
Net Income (Diluted) (in dollars per share)	0.24	0.35	0.40	0.68
Cash Dividends (in dollars per share)	$ 0.13	$ 0.13	$ 0.26	$ 0.26
Investment management and trust services
NON-INTEREST INCOME
Non-interest income before investment securities gains	$ 13,407	$ 14,153	$ 28,462	$ 27,392
Other service charges and fees
NON-INTEREST INCOME
Non-interest income before investment securities gains	16,748	19,018	35,167	34,268
Service charges on deposit accounts
NON-INTEREST INCOME
Non-interest income before investment securities gains	9,138	12,367	20,377	23,744
Mortgage banking income
NON-INTEREST INCOME
Non-interest income before investment securities gains	9,964	6,593	16,198	11,365
Other
NON-INTEREST INCOME
Non-interest income before investment securities gains	$ 3,660	$ 2,008	$ 7,311	$ 4,056

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	$ 39,559	$ 59,779	$ 65,606	$ 116,442
Other Comprehensive Income, net of tax:
Unrealized gain on securities	34,424	24,917	51,853	45,215
Amortization of net unrealized losses on available for sale securities transferred to held to maturity	793	1,021	1,589	1,995
Non-credit related unrealized loss on other-than-temporarily impaired debt securities	0	(600)	0	(682)
Amortization of net unrecognized pension and postretirement income	255	275	510	566
Other Comprehensive Income	33,131	25,476	51,576	46,906
Total Comprehensive Income	$ 72,690	$ 85,255	$ 117,182	$ 163,348

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]
Beginning Balance at Dec. 31, 2018	$ 2,247,573	$ 554,377	$ 1,489,703	$ 946,032	$ (59,063)	$ (683,476)
Beginning Balance (in shares) at Dec. 31, 2018		170,184
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	116,442			116,442
Other comprehensive income	46,906				46,906
Stock issued (in shares)		544
Stock issued	1,653	$ 1,313	577			(237)
Stock-based compensation awards (in shares)
Stock-based compensation awards	3,348		3,348
Acquisition of treasury stock (in shares)		(3,825)
Acquisition of treasury stock (in shares)	(63,386)					(63,386)
Common stock cash dividends	(43,738)			(43,738)
Ending Balance at Jun. 30, 2019	2,308,798	$ 555,690	1,493,628	1,018,736	(12,157)	(747,099)
Ending Balance (in shares) at Jun. 30, 2019		166,903
Beginning Balance at Mar. 31, 2019	2,301,019	$ 554,485	1,491,870	980,708	(37,633)	(688,411)
Beginning Balance (in shares) at Mar. 31, 2019		169,923
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	59,779			59,779
Other comprehensive income	25,476				25,476
Stock issued (in shares)		429
Stock issued	(4)	$ 1,205	(30)			(1,179)
Stock-based compensation awards (in shares)
Stock-based compensation awards	1,788		1,788
Acquisition of treasury stock (in shares)		(3,449)
Acquisition of treasury stock (in shares)	(57,509)					(57,509)
Common stock cash dividends	(21,751)			(21,751)
Ending Balance at Jun. 30, 2019	2,308,798	$ 555,690	1,493,628	1,018,736	(12,157)	(747,099)
Ending Balance (in shares) at Jun. 30, 2019		166,903
Beginning Balance at Dec. 31, 2019	2,342,176	$ 556,110	1,499,681	1,079,391	(137)	(792,869)
Beginning Balance (in shares) at Dec. 31, 2019		164,218
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	65,606			65,606
Other comprehensive income	51,576				51,576
Stock issued (in shares)		648
Stock issued	3,198	$ 1,459	540			1,200
Stock-based compensation awards (in shares)
Stock-based compensation awards	3,530		3,530
Acquisition of treasury stock (in shares)		(2,908)
Acquisition of treasury stock (in shares)	(39,748)					(39,748)
Common stock cash dividends	(42,030)			(42,030)
Ending Balance at Jun. 30, 2020	2,340,501	$ 557,569	1,503,750	1,059,160	51,439	(831,417)
Ending Balance (in shares) at Jun. 30, 2020		161,958
Beginning Balance at Mar. 31, 2020	2,285,748	$ 556,243	1,502,189	1,040,646	18,308	(831,638)
Beginning Balance (in shares) at Mar. 31, 2020		161,435
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	39,559
Other comprehensive income	33,131				33,131
Stock issued (in shares)		523
Stock issued	1,197	$ 1,326	(350)			221
Stock-based compensation awards (in shares)
Stock-based compensation awards	1,911		1,911
Common stock cash dividends	(21,045)			(21,045)
Ending Balance at Jun. 30, 2020	$ 2,340,501	$ 557,569	$ 1,503,750	$ 1,059,160	$ 51,439	$ (831,417)
Ending Balance (in shares) at Jun. 30, 2020		161,958

Consolidated Statements of Sh_2

Consolidated Statements of Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Stockholders' Equity [Abstract]
Cash dividends per share	$ 0.13	$ 0.13	$ 0.26	$ 0.26

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 65,606	$ 116,442
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Provision for credit losses	63,600	10,125
Depreciation and amortization of premises and equipment	14,331	13,924
Amortization of TCI	15,237	16,311
Net amortization of investment securities premiums	5,599	4,359
Investment securities gains, net	(3,051)	(241)
Gain on sales of mortgage loans held for sale	(22,728)	(8,302)
Proceeds from sales of mortgage loans held for sale	584,924	375,306
Originations of mortgage loans held for sale	(601,783)	(385,659)
Amortization of intangible assets	264	214
Amortization of issuance costs and discounts on long-term debt	543	421
Stock-based compensation	3,530	3,348
Other changes, net	(161,412)	(67,400)
Total adjustments	(100,946)	(37,594)
Net cash (used in) provided by operating activities	(35,340)	78,848
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from sales of securities AFS	187,819	283,952
Proceeds from principal repayments and maturities of HTM securities	40,374	40,058
Proceeds from principal repayments and maturities of securities AFS	147,551	113,154
Purchase of securities AFS	(418,395)	(538,629)
Sale (purchase) of FRB and FHLB stock	6,380	(17,965)
Net increase in loans	(1,882,433)	(205,404)
Net change in tax credit investments	(13,881)	(22,695)
Net cash paid for acquisition	0	(3,907)
Net change in tax credit investments	4,873	11,092
Net cash used in investing activities	(1,937,458)	(362,528)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase (decrease) in demand and savings deposits	2,678,900	(228,999)
Net (decrease) increase in time deposits	(188,604)	241,735
(Decrease) increase in short-term borrowings	(310,690)	433,613
Additions to long-term debt	495,898	105,000
Repayments of long-term debt	(83,015)	(110,132)
Net proceeds from issuance of common stock	3,198	1,653
Dividends paid	(42,333)	(42,680)
Acquisition of treasury stock	(39,748)	(63,386)
Net cash provided by financing activities	2,513,606	336,804
Net Increase in Cash and Cash Equivalents	540,808	53,124
Cash and Cash Equivalents at Beginning of Period	517,791	445,687
Cash and Cash Equivalents at End of Period	1,058,599	498,811
Cash paid during the period for:
Interest	63,837	88,186
Income taxes	$ 11,051	$ 4,932

Basis of Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited Consolidated Financial Statements of the Corporation have been prepared in conformity with GAAP for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and notes required by GAAP for complete financial statements. The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the amounts of assets and liabilities as of the date of the financial statements as well as revenues and expenses during the period. Actual results could differ from those estimates. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. These Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and the notes thereto included in the Corporation's Annual Report on Form 10-K for the year ended December 31, 2019. Operating results for the three 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 Corporation evaluates subsequent events through the date of filing of this Form 10-Q with the SEC. CECL Adoption and Updated Significant Accounting Policy On January 1, 2020, the Corporation adopted ASU 2016-13, Financial Instruments - Credit Losses (ASC Topic 326): Measurement of Credit Losses on Financial Instruments, which replaces the incurred loss methodology, and is referred to as CECL. The measurement of expected credit losses under CECL is applicable to financial assets measured at amortized cost, including loans and HTM debt securities. It also applies to OBS credit exposures (loan commitments, standby letters of credit, financial guarantees, and other similar instruments) and net investments in leases recognized by a lessor in accordance with ASC Topic 842. The Corporation adopted CECL using the modified retrospective method for all financial assets measured at amortized cost, net of investments in leases and OBS credit exposures. Results for reporting periods beginning after January 1, 2020 are presented under CECL, while prior period results are reported in accordance with the previously applicable incurred loss methodology. The Corporation recorded an increase of $58.3 million to the ACL on January 1, 2020 as a result of the adoption of CECL. Retained earnings decreased $43.8 million and deferred tax assets increased by $12.4 million. Included in the $58.3 million increase to the ACL was $2.1 million for certain OBS credit exposures that was previously recognized in other liabilities before the adoption of CECL. Loans : Loans are stated at their principal amount outstanding, except for mortgage loans held for sale, which are carried at fair value. Interest income on loans is accrued as earned. Unearned income on lease financing receivables is recognized on a basis which approximates the effective yield method. In general, loans are placed on non-accrual status once they become 90 days delinquent as to principal or interest. In certain cases a loan may be placed on non-accrual status prior to being 90 days delinquent if there is an indication that the borrower is having difficulty making payments, or the Corporation believes it is probable that all amounts will not be collected according to the contractual terms of the loan agreement. When interest accruals are discontinued, unpaid interest previously credited to income is reversed. Non-accrual loans may be restored to accrual status when all delinquent principal and interest has been paid currently for six consecutive months or the loan is considered secured and in the process of collection. The Corporation generally applies payments received on non-accruing loans to principal until such time as the principal is paid off, after which time any payments received are recognized as interest income. If the Corporation believes that all amounts outstanding on a non-accrual loan will ultimately be collected, payments received subsequent to its classification as a non-accrual loan are allocated between interest income and principal. A loan that is 90 days delinquent may continue to accrue interest if the loan is both adequately secured and is in the process of collection. Past due status is determined based on contractual due dates for loan payments. An adequately secured loan is one that has collateral with a supported fair value that is sufficient to discharge the debt, and/or has an enforceable guarantee from a financially responsible party. A loan is considered to be in the process of collection if collection is proceeding through legal action or through other activities that are reasonably expected to result in repayment of the debt or restoration to current status in the near future. Loans deemed to be a loss are written off through a charge against the ACL. Closed-end consumer loans are generally charged off when they become 120 days past due (180 days for open-end consumer loans) if they are not adequately secured by real estate. All other loans are evaluated for possible charge-off when it is probable that the balance will not be collected, based on the ability of the borrower to pay and the value of the underlying collateral, if any. Principal recoveries of loans previously charged off are recorded as increases to the ACL. Loan Origination Fees and Costs: Loan origination fees and the related direct origination costs are deferred and amortized over the life of the loan as an adjustment to interest income using the effective yield method. For mortgage loans sold, net loan origination fees and costs are included in the gain or loss on sale of the related loan, as components of mortgage banking. Loan origination fees and the related direct origination costs for loans originated under the PPP loan program are amortized on a straight-line basis over the repayment period of the loan. To the extent that a PPP loan is forgiven, the unamortized fees will be recorded at the time of forgiveness. Troubled Debt Restructurings: Loans are accounted for and reported as TDRs when, for economic or legal reasons, the Corporation grants a concession to a borrower experiencing financial difficulty that it would not otherwise consider. Concessions, whether negotiated or imposed by bankruptcy, granted under a TDR typically involve a temporary deferral of scheduled loan payments, an extension of a loan’s stated maturity date or a reduction in the interest rate. Non-accrual TDRs can be restored to accrual status if principal and interest payments, under the modified terms, are current for six consecutive months after modification. On March 27, 2020 the CARES Act was signed into law. The CARES Act includes an option for financial institutions to suspend the requirements of GAAP for certain loan modifications that would otherwise be categorized as a TDR. Certain conditions must be met with respect to the loan modification including that the modification is related to COVID-19, the modified loan was not more than 30 days past due on December 31, 2019 and the modification was executed between March 1, 2020 and the earlier of (a) 60 days after the date of the COVID-19 national emergency comes to an end or (b) December 31, 2020. The Corporation is applying the option under the CARES act for all loan modifications that qualify. On April 7, 2020, Troubled Debt Restructurings: Interagency Statement on Loan Modifications and Reporting for Financial Institutions Working with Customers Affected by COVID-19 was issued by the federal banking regulatory agencies. Included in the Interagency Statement were provisions permitting banks that grant loan modifications to customers impacted by COVID-19 to exclude those modifications from loans categorized as TDRs. The Corporation is adopting the guidance in this Interagency Statement effective for COVID-19-related modifications occurring subsequent to March 13, 2020. Allowance for Credit Losses: The discussion that follows describes the methodology for determining the ACL under the CECL model that was adopted January 1, 2020. The allowance methodology for prior periods is disclosed in the Corporation’s 2019 Annual Report on Form 10-K. The Corporation has elected to exclude accrued interest receivable from the measurement of its ACL. When a loan is placed on non-accrual status, any outstanding accrued interest is reversed against interest income. Loans: The ACL for loans is an estimate of the expected losses to be realized over the life of the loans in the portfolio. The ACL is determined for two distinct categories of loans: 1) loans evaluated collectively for expected credit losses and 2) loans evaluated individually for expected credit losses. The ACL also includes certain qualitative adjustments to the CECL model. Loans Evaluated Collectively : Loans evaluated collectively for expected credit losses include loans on accrual status, excluding accruing TDRs, and loans initially evaluated individually, but determined not to have enhanced credit risk characteristics. This category includes loans on non-accrual status and TDRs where the total commitment amount is less than $1 million. In order to determine the ACL: • Loans are aggregated into pools based on similar risk characteristics. • The PD and LGD CECL model components are determined based on loss estimates driven by historical experience at the input level. • The PD model component uses "through the economic cycle transition" matrices based on the Corporation's historical loan and transaction data across each pool of loans. • The LGD model component calculates a lifetime LGD estimate across each pool of loans utilizing a non parametric loss curve modeling approach. • Reasonable and supportable forecasts are incorporated into the PD model component. • Reasonable and supportable forecast periods are based on different economic forecasts and scenarios sourced from an external party. A future loss forecast over the reasonable and supportable forecast period is based on the projected performance of specific economic variables that statistically correlate with the PD and LGD pools. After the reasonable and supportable forecast period, loss estimates naturally revert to input-level reversion. • Cash flow assumptions are established for each loan using maturity date, amortization schedule and interest rate. • A constant prepayment rate is calculated for each loan pool in the CECL model. Loans Evaluated Individually : Loans evaluated individually for expected credit losses include loans on non-accrual status and TDRs where the commitment amount equals or exceeds $1.0 million. The required ACL for such loans is determined using either the present value of expected future cash flows, observable market price or the fair value of collateral. Loans evaluated individually may have specific allocations assigned if the measured value of the loan using one of the noted techniques is less than its current carrying value. For loans measured using the fair value of collateral, if the analysis determines that sufficient collateral value would be available for repayment of the debt, then no allocations would be assigned to those loans. Collateral could be in the form of real estate or business assets, such as accounts receivable or inventory, in the case of commercial and industrial loans. Commercial and industrial loans may also be secured by real estate. For loans secured by real estate, estimated fair values are determined primarily through appraisals performed by third-party appraisers, discounted to arrive at expected net sale proceeds. For collateral dependent loans, estimated real estate fair values are also net of estimated selling costs. When a real estate secured loan is impaired, a decision is made regarding whether an updated appraisal of the real estate is necessary. This decision is based on various considerations, including: the age of the most recent appraisal; the loan-to-value ratio based on the original appraisal; the condition of the property; the Corporation’s experience and knowledge of the real estate market; the purpose of the loan; market factors; payment status; the strength of any guarantors; and the existence and age of other indications of value such as broker price opinions, among others. The Corporation generally obtains updated appraisals performed by third-party appraisers for impaired loans secured predominantly by real estate every 12 months. When updated appraisals are not obtained for loans secured by real estate, fair values are estimated based on the original appraisal values, as long as the original appraisal indicated an acceptable loan-to-value position and there has not been a significant deterioration in the collateral value since the original appraisal was performed. For loans with principal balances greater than or equal to $1.0 million secured by non-real estate collateral, such as accounts receivable or inventory, estimated fair values are determined based on borrower financial statements, inventory listings, accounts receivable agings or borrowing base certificates. Indications of value from these sources are generally discounted based on the age of the financial information or the quality of the assets. Liquidation or collection discounts are applied to these assets based upon existing loan evaluation policies. Management regularly reviews loans in the portfolio to assess credit quality indicators and to determine appropriate loan classification. For commercial loans, commercial mortgages and construction loans to commercial borrowers, an internal risk rating process is used. The Corporation believes that internal risk ratings are the most relevant credit quality indicator for these types of loans. The migration of loans through the various internal risk rating categories is a significant component of the ACL methodology for these loans, which bases the PD on this migration. Assigning risk ratings involves judgment. Risk ratings may be changed based on ongoing monitoring procedures, or if specific loan review assessments identify a deterioration or an improvement in the loan. The following is a summary of the Corporation's internal risk rating categories: • Pass : These loans do not currently pose undue credit risk and can range from the highest to average quality, depending on the degree of potential risk. • Special Mention : These loans have a heightened credit risk, but not to the point of justifying a classification of Substandard. Loans in this category are currently acceptable, but are nevertheless potentially weak. • Substandard or Lower : These loans are inadequately protected by current sound worth and paying capacity of the borrower. There exists a well-defined weakness or weaknesses that jeopardize the normal repayment of the debt. The allocation of the ACL is reviewed to evaluate its appropriateness in relation to the overall risk profile of the loan portfolio. The Corporation considers risk factors such as: local and national economic conditions; trends in delinquencies and non-accrual loans; the diversity of borrower industry types; and the composition of the portfolio by loan type. Qualitative and Other Adjustments to ACL: In addition to the quantitative credit loss estimates for loans evaluated collectively, qualitative factors that may not be fully captured in the quantitative results are also evaluated. These include changes in lending policy, the nature and volume of the portfolio, overall business conditions in the economy, credit concentrations, competition, model imprecision, and legal and regulatory requirements. Qualitative adjustments are judgmental and are based on management’s knowledge of the portfolio and the markets in which the Corporation operates. Qualitative adjustments are evaluated and approved on a quarterly basis. Additionally, the ACL includes other allowance categories that are not directly incorporated in the quantitative results. These categories include but are not limited to loans-in-process, trade acceptances and overdrafts. OBS Credit Exposures: The ACL for OBS credit exposures is recorded in other liabilities on the consolidated balance sheets. This portion of the ACL represents management’s estimate of expected losses in its unfunded loan commitments and other OBS credit exposures, such as letters of credit and credit recourse on sold residential mortgage loans. The ACL specific to unfunded commitments is determined by estimating future draws and applying the expected loss rates on those draws. Future draws are based on historical averages of utilization rates (i.e., the likelihood of draws taken). The ACL for OBS credit exposures is increased or decreased by charges or reductions to expense, through the provision for credit losses. HTM Debt Securities: Expected credit losses on HTM debt securities would be recorded in the ACL on HTM debt securities. As of June 30, 2020, no HTM debt securities required an ACL as these investments consist solely of government guaranteed residential mortgage-backed securities. AFS Debt Securities : The ACL approach for AFS debt securities differs from the CECL approach used for HTM debt securities as AFS debt securities are carried at fair value rather than amortized cost. Prior to the adoption of CECL, credit losses on AFS debt securities were determined using an OTTI approach. Under CECL, the concept of OTTI has been eliminated, but the general approach to determining credit losses is largely consistent with the OTTI method. Under CECL, credit losses on AFS debt securities are recognized through an ACL rather than through a direct write-down of the security. As of June 30, 2020, no AFS debt securities required an ACL. Other Recently Adopted Accounting Standards On January 1, 2020, the Corporation adopted ASC Update 2018-13 - Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement. This update changes the fair value measurement disclosure requirements of ASC Topic 820 "Fair Value Measurement." Among other things, the update modifies the disclosure objective paragraphs of ASC 820 to eliminate: (1) "at a minimum" from the phrase "an entity shall disclose at a minimum;" and (2) other similar disclosure requirements to promote the appropriate exercise of discretion by entities. The Corporation adopted this standards update effective with its March 31, 2020 quarterly report on Form 10-Q and it did not have a material impact on its consolidated financial statements. On January 1, 2020, the Corporation adopted ASC Update 2018-15 - Intangibles - Goodwill and Other - Internal-Use Software (Topic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract. This update requires a customer in a cloud computing arrangement that is a service contract to follow the internal-use software guidance in ASC Subtopic 350-40 to determine which implementation costs to capitalize as assets. The Corporation adopted this standards update effective with its March 31, 2020 quarterly report on Form 10-Q and it did not have a material impact on its consolidated financial statements In March 2020, the Corporation adopted ASC Update 2020-04 - Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting. This standards update provided optional guidance for a limited time to ease the potential burden in accounting for reference rate reform, specific to those using LIBOR or another reference rate expected to be discontinued due to this reform. The Corporation adopted this standards update effective with its March 31, 2020 quarterly report on Form 10-Q and it did not have a material impact on its consolidated financial statements. Recently Issued Accounting Standards Standard Description Date of Anticipated Adoption Effect on Financial Statements ASC Update 2018-14 Compensation - Retirement Benefits - Defined Benefit Plans - General (Subtopic 715-20): Disclosure Framework - Changes to the Disclosure Requirements for Defined Benefit Plans This update amends ASC Topic 715-20 to add, remove, and clarify disclosure requirements related to defined benefit pension and other postretirement plans. Fiscal Year 2020 The Corporation intends to adopt this standards update effective with its December 31, 2020 annual report on Form 10-K. This standard will impact the Corporation's disclosure relating to employee benefit plans, but the Corporation does not expect the adoption of this update to have a material impact on its consolidated financial statements. ASC Update 2019-12 Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes This update simplifies the accounting for income taxes by removing certain exceptions to the general principles in Topic 740. The amendments also improve consistent application of and simplify GAAP for other areas of Topic 740 by clarifying and amending existing guidance. First Quarter 2021 The Corporation intends to adopt this standards update effective with its March 31, 2021 quarterly report on Form 10-Q. This update is not expected to have a material impact on the consolidated financial statements. Reclassifications

Restrictions on Cash and Cash E

Restrictions on Cash and Cash Equivalents	6 Months Ended
	Jun. 30, 2020
Cash and Cash Equivalents [Abstract]
Restrictions on Cash and Cash Equivalents	Restrictions on Cash and Cash EquivalentsThe Bank is required to maintain reserves against its deposit liabilities. Prior to March 2020, reserves were in the form of cash and balances with the FRB. The FRB suspended cash reserve requirements effective March 26, 2020. The amount of such reserves as of December 31, 2019 was $218.9 million. In addition, cash collateral is posted by the Corporation with counterparties to secure derivative and other contracts. The amounts of such cash collateral as of June 30, 2020 and December 31, 2019 were $473.2 million and $199.6 million, respectively.

Investment Securities

Investment Securities	6 Months Ended
	Jun. 30, 2020
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Investment Securities The following table presents the amortized cost and estimated fair values of investment securities as of June 30, 2020: Amortized Gross Gross Estimated (in thousands) Available for Sale State and municipal securities $ 852,617 $ 41,292 $ (227) $ 893,682 Corporate debt securities 312,507 15,168 (2,322) 325,353 Collateralized mortgage obligations 559,281 19,113 — 578,394 Residential mortgage-backed securities 156,152 4,716 — 160,868 Commercial mortgage-backed securities 560,294 24,849 — 585,143 Auction rate securities 107,410 — (6,551) 100,859 Total $ 2,548,261 $ 105,138 $ (9,100) $ 2,644,299 Held to Maturity Residential mortgage-backed securities $ 330,514 $ 23,595 $ — $ 354,109 The following table presents the amortized cost and estimated fair values of investment securities as of December 31, 2019: Amortized Gross Gross Estimated (in thousands) Available for Sale State and municipal securities $ 638,125 $ 15,826 $ (1,024) $ 652,927 Corporate debt securities 370,401 8,490 (1,534) 377,357 Collateralized mortgage obligations 682,307 11,726 (315) 693,718 Residential mortgage-backed securities 177,183 1,078 (949) 177,312 Commercial mortgage-backed securities 489,603 6,471 (1,777) 494,297 Auction rate securities 107,410 — (5,484) 101,926 Total $ 2,465,029 $ 43,591 $ (11,083) $ 2,497,537 Held to Maturity Residential mortgage-backed securities $ 369,841 $ 13,864 $ — $ 383,705 Securities carried at $468.8 million at June 30, 2020 and $462.6 million at December 31, 2019 were pledged as collateral to secure public and trust deposits and customer repurchase agreements. During the second quarter of 2020, the Corporation completed a limited balance sheet restructuring that included the sale of investment securities, with an amortized cost $79.0 million and an estimated fair value of $82.0 million, resulting in net investment securities gains of $3.0 million. Offsetting these gains were $2.9 million of prepayment penalties recorded in non-interest expense for the redemption of FHLB advances. The amortized cost and estimated fair values of debt securities as of June 30, 2020, by contractual maturity, are shown in the following table. Actual maturities may differ from contractual maturities as certain investment securities are subject to call or prepayment with or without call or prepayment penalties. Available for Sale Held to Maturity Amortized Estimated Amortized Estimated (in thousands) Due in one year or less $ 12,731 $ 12,731 $ — $ — Due from one year to five years 31,144 32,687 — — Due from five years to ten years 301,186 313,583 — — Due after ten years 927,473 960,893 — — 1,272,534 1,319,894 — — Residential mortgage-backed securities (1) 156,152 160,868 330,514 354,109 Commercial mortgage-backed securities (1) 560,294 585,143 — — Collateralized mortgage obligations (1) 559,281 578,394 — — Total $ 2,548,261 $ 2,644,299 $ 330,514 $ 354,109 (1) Mortgage-backed securities and collateralized mortgage obligations do not have stated maturities and are dependent upon the interest rate environment and prepayments on the underlying loans. The following table presents information related to the gross realized gains and losses on the sales of investment securities for the periods presented: Gross Realized Gains Gross Realized Losses Net Gains (in thousands) Three months ended June 30, 2020 $ 6,334 $ (3,329) $ 3,005 June 30, 2019 3,012 (2,836) 176 Six months ended June 30, 2020 $ 6,451 $ (3,400) $ 3,051 June 30, 2019 3,269 (3,028) 241 The following tables present the gross unrealized losses and estimated fair values of investment securities, aggregated by category and length of time that individual securities have been in a continuous unrealized loss position as of June 30, 2020: Less than 12 months 12 months or longer Total Number of Securities Estimated Unrealized Number of Securities Estimated Unrealized Estimated Unrealized Available for Sale (in thousands) State and municipal securities 9 $ 30,378 $ (227) — $ — $ — $ 30,378 $ (227) Corporate debt securities 15 85,486 (2,322) — — — 85,486 (2,322) Auction rate securities — — — 177 100,859 (6,551) 100,859 (6,551) Total available for sale (1) 24 $ 115,864 $ (2,549) 177 $ 100,859 $ (6,551) $ 216,723 $ (9,100) (1) No HTM securities were in an unrealized loss position as of June 30, 2020. The following tables present the gross unrealized losses and estimated fair values of investment securities, aggregated by category and length of time that individual securities have been in a continuous unrealized loss position as of December 31, 2019: Less than 12 months 12 months or longer Total Number of Securities Estimated Unrealized Number of Securities Estimated Unrealized Estimated Unrealized Available for Sale (in thousands) State and municipal securities 44 $ 136,344 $ (1,024) — $ — $ — $ 136,344 $ (1,024) Corporate debt securities 5 30,719 (346) 8 18,759 (1,188) 49,478 (1,534) Collateralized mortgage obligations 5 33,865 (190) 1 5,330 (125) 39,195 (315) Residential mortgage-backed securities 5 12,247 (40) 26 127,373 (909) 139,620 (949) Commercial mortgage-backed securities 7 121,340 (1,777) — — — 121,340 (1,777) Auction rate securities — — — 177 101,926 (5,484) 101,926 (5,484) Total available for sale (1) 66 $ 334,515 $ (3,377) 212 $ 253,388 $ (7,706) $ 587,903 $ (11,083) (1) No HTM securities were in an unrealized loss position as of December 31, 2019. The Corporation’s collateralized mortgage obligations and mortgage-backed securities have contractual terms that generally do not permit the issuer to settle the securities at a price less than the amortized cost of the investment. The change in fair value of these securities is attributable to changes in interest rates and not credit quality, and the Corporation does not have the intent to sell and does not believe it will more likely than not be required to sell any of these securities prior to a recovery of their fair value to amortized cost. Therefore, the Corporation does not have an ACL for these investments as of June 30, 2020.

Loans and Allowance for Credit

Loans and Allowance for Credit Losses	6 Months Ended
	Jun. 30, 2020
Receivables [Abstract]
Loans and Allowance for Credit Losses	Allowance for Credit Losses and Asset Quality Net Loans are summarized as follows: June 30, December 31, 2019 (in thousands) Real estate - commercial mortgage $ 6,934,936 $ 6,700,776 Commercial and industrial 5,971,201 4,446,701 Real-estate - residential mortgage 2,862,226 2,641,465 Real-estate - home equity 1,251,455 1,314,944 Real-estate - construction 972,909 971,079 Consumer 465,610 463,164 Equipment lease financing and other 266,521 322,625 Overdrafts 3,622 3,582 Gross loans 18,728,480 16,864,336 Unearned income (23,758) (26,810) Net Loans $ 18,704,722 $ 16,837,526 The Corporation segments its loan portfolio by "portfolio segments," as presented in the table above. Certain portfolio segments are further disaggregated by "class segment" for the purpose of estimating credit losses. See "Allowance for Credit Losses" below for further discussion regarding portfolio and class segments and their impact on the determination of the ACL. Allowance for Credit Losses, effective January 1, 2020 As discussed in Note 1, "Basis of Presentation," the Corporation adopted CECL effective January 1, 2020. CECL requires estimated credit losses on loans to be determined based on an expected life of loan model, as compared to an incurred loss model (in effect for periods prior to 2020). Accordingly, ACL disclosures subsequent to January 1, 2020 are not always comparable to prior periods. In addition, certain new disclosures required under CECL are not applicable to prior periods. As a result, the following tables present disclosures separately for each period, where appropriate. New disclosures required under CECL are only shown for the current period and are noted. See Note 1, "Basis of Presentation", for a summary of the impact of adopting CECL on January 1, 2020. Under CECL, loans evaluated individually for impairment consist of non-accrual loans and TDRs. Under the incurred loss model in effect prior to the adoption of CECL, loans evaluated individually for impairment were referred to as impaired loans. The ACL related to loans consists of loans evaluated collectively and individually for expected credit losses. The ACL related to loans represents an estimate of expected credit losses over the expected life of the loans as of the balance sheet date and is recorded as a reduction to Net Loans. The ACL for OBS credit exposures includes estimated losses on unfunded loan commitments, letters of credit and other OBS credit exposures. The total ACL is increased by charges to expense, through the provision for credit losses, and decreased by charge-offs, net of recoveries. The following table presents the components of the ACL under CECL: June 30, 2020 (in thousands) ACL - loans $ 256,537 ACL - OBS credit exposure 16,383 Total ACL $ 272,920 The following table presents the activity in the ACL in 2020: Three months ended June 30, 2020 Six months ended June 30, 2020 (in thousands) Balance at beginning of period $ 257,471 $ 166,209 Impact of adopting CECL (1) — 58,348 Loans charged off (8,047) (22,050) Recoveries of loans previously charged off 3,926 6,813 Net loans charged off (4,121) (15,237) Provision for credit losses (2) 19,570 63,600 Balance at end of period $ 272,920 $ 272,920 (1) Includes $12.6 million of reserves for OBS credit exposures as of January 1, 2020. (2) Includes $(2.6) million and $1.2 million related to OBS credit exposures for the three and six months ended June 30, 2020, respectively. The following table presents the activity in the ACL - loans by portfolio segment, for the three and six months ended June 30, 2020: Real Estate - Commercial and Real Estate - Real Estate - Real Estate - Consumer Equipment lease financing, other Total (in thousands) Three months ended June 30, 2020 Balance at March 31, 2020 $ 90,319 $ 63,606 $ 15,253 $ 42,427 $ 8,398 $ 9,865 $ 8,640 $ 238,508 Loans charged off (2,324) (3,480) (458) (235) (17) (845) (688) (8,047) Recoveries of loans previously charged off 95 2,978 44 112 — 605 92 3,926 Net loans recovered (charged off) (2,229) (502) (414) (123) (17) (240) (596) (4,121) Provision for loan losses (1) 14,605 (1,657) 1,552 4,139 3,933 674 (1,096) 22,150 Balance at June 30, 2020 $ 102,695 $ 61,447 $ 16,391 $ 46,443 $ 12,314 $ 10,299 $ 6,948 $ 256,537 Six months ended June 30, 2020 Balance at December 31, 2019 $ 45,610 $ 68,602 $ 17,744 $ 19,771 $ 4,443 $ 3,762 $ 3,690 $ 163,622 Impact of CECL 29,361 (18,576) (65) 21,235 4,015 5,969 3,784 45,723 Loans charged off (3,179) (14,379) (745) (422) (17) (2,087) (1,221) (22,050) Recoveries of loans previously charged off 339 4,712 261 197 70 1,034 200 6,813 Net loans recovered (charged off) (2,840) (9,667) (484) (225) 53 (1,053) (1,021) (15,237) Provision for loan losses (1) 30,564 21,088 (804) 5,662 3,803 1,621 495 62,429 Balance at June 30, 2020 $ 102,695 $ 61,447 $ 16,391 $ 46,443 $ 12,314 $ 10,299 $ 6,948 $ 256,537 (1) Provision included in the table only includes the portion related to Net Loans. The following table presents the ACL - loans and amortized cost basis of Net Loans under CECL methodology as of June 30, 2020: ACL - Loans Net Loans Collectively Evaluated for Impairment Individually Evaluated for Impairment Total ACL - Loans Collectively Evaluated for Impairment Individually Evaluated for Impairment Total Net Loans (in thousands) June 30, 2020 Real Estate - Commercial Mortgage $ 94,654 $ 8,041 $ 102,695 $ 6,873,754 $ 61,182 $ 6,934,936 Commercial and Industrial 54,413 7,034 61,447 5,927,424 43,777 5,971,201 Real Estate - Home Equity 8,510 7,881 16,391 1,228,411 23,044 1,251,455 Real Estate - Residential Mortgage 39,984 6,459 46,443 2,817,173 45,053 2,862,226 Real Estate - Construction 12,060 254 12,314 969,427 3,482 972,909 Consumer 10,182 117 10,299 465,418 192 465,610 Equipment Lease Financing and Other 6,948 — 6,948 229,562 16,823 246,385 Total $ 226,751 $ 29,786 $ 256,537 $ 18,511,169 $ 193,553 $ 18,704,722 Allowance for Credit Losses, prior to January 1, 2020 Prior to January 1, 2020, the ACL consisted of the allowance for loan losses and the reserve for unfunded lending commitments. The allowance for loan losses represented management’s estimate of incurred losses in the loan portfolio as of the balance sheet date and is recorded as a reduction to Net Loans. The reserve for unfunded lending commitments represented management’s estimate of incurred losses in unfunded loan commitments and letters of credit, and was recorded in other liabilities on the consolidated balance sheets. The ACL was increased by charges to expense, through the provision for credit losses, and decreased by charge-offs, net of recoveries. The following table presents the components of the ACL: December 31, 2019 (in thousands) Allowance for loan losses $ 163,622 Reserve for unfunded lending commitments 2,587 ACL $ 166,209 The following table presents the activity in the ACL for the periods indicated in 2019: Three months ended June 30, 2019 Six months ended June 30, 2019 (in thousands) Balance at beginning of period $ 170,372 $ 169,410 Loans charged off (3,711) (10,080) Recoveries of loans previously charged off 5,255 7,486 Net loans charged off 1,544 (2,594) Provision for credit losses(1) 5,025 10,125 Balance at end of period $ 176,941 $ 176,941 (1) Includes ($1.6 million) and ($2.2 million) related to reserve for unfunded lending commitments for the three and six months ended June 30, 2019, respectively. The following table presents the activity in the allowance for loan losses, by portfolio segment, for the three and six months ended June 30, 2019: Real Estate - Commercial & Real Estate - Real Estate - Real Estate - Consumer Equipment lease financing, other Total (in thousands) Three months ended June 30, 2019 Balance at March 31, 2019 $ 51,946 $ 60,501 $ 19,215 $ 19,146 $ 4,941 $ 3,319 $ 3,041 $ 162,109 Loans charged off (230) (1,895) (206) (134) (3) (795) (448) (3,711) Recoveries of loans previously charged off 169 2,680 223 211 1,245 579 148 5,255 Net loans recovered (charged off) (61) 785 17 77 1,242 (216) (300) 1,544 Provision for loan losses 2,974 5,055 (251) (331) (1,255) 260 128 6,580 Balance at June 30, 2019 $ 54,859 $ 66,341 $ 18,981 $ 18,892 $ 4,928 $ 3,363 $ 2,869 $ 170,233 Six months ended June 30, 2019 Balance at December 31, 2018 $ 52,889 $ 58,868 $ 18,911 $ 18,921 $ 5,061 $ 3,217 $ 2,670 $ 160,537 Loans charged off (1,375) (4,682) (425) (789) (98) (1,478) (1,233) (10,080) Recoveries of loans previously charged off 305 3,923 420 343 1,329 789 377 7,486 Net loans recovered (charged off) (1,070) (759) (5) (446) 1,231 (689) (856) (2,594) Provision for loan losses 3,040 8,232 75 417 (1,364) 835 1,055 12,290 Balance at June 30, 2019 $ 54,859 $ 66,341 $ 18,981 $ 18,892 $ 4,928 $ 3,363 $ 2,869 $ 170,233 (1) The provision in the table only includes the portion related to Net Loans. The following table presents Net Loans and their related allowance for loan losses, by portfolio segment as of June 30, 2019: Real Estate - Commercial and Real Estate - Real Estate - Real Estate - Consumer Equipment lease financing, other and Total (in thousands) Allowance for loan losses: Collectively evaluated for impairment $ 45,367 $ 53,985 $ 8,463 $ 9,913 $ 4,399 $ 3,356 $ 2,869 $ 128,352 Individually evaluated for impairment 9,492 12,356 10,518 8,979 529 7 — 41,881 Total $ 54,859 $ 66,341 $ 18,981 $ 18,892 $ 4,928 $ 3,363 $ 2,869 $ 170,233 Net Loans: Collectively evaluated for impairment $ 6,438,080 $ 4,313,666 $ 1,363,392 $ 2,414,627 $ 918,380 $ 452,865 $ 273,118 $ 16,174,128 Individually evaluated for impairment 59,893 51,582 23,582 37,339 4,167 9 17,758 194,330 Total $ 6,497,973 $ 4,365,248 $ 1,386,974 $ 2,451,966 $ 922,547 $ 452,874 $ 290,876 $ 16,368,458 Non-accrual Loans All loans individually evaluated for impairment are measured for losses on a quarterly basis. As of June 30, 2020 and December 31, 2019, substantially all of the Corporation’s individually evaluated loans with total commitments greater than or equal to $1.0 million were measured based on the estimated fair value of each loan’s collateral, if any. Collateral could be in the form of real estate, in the case of commercial mortgages and construction loans, or business assets, such as accounts receivable or inventory, in the case of commercial and industrial loans. Commercial and industrial loans may also be secured by real estate. As of June 30, 2020 and December 31, 2019, approximately 97% and 93%, respectively, of loans evaluated individually for impairment with principal balances greater than or equal to $1.0 million, whose primary collateral is real estate, were measured at estimated fair value using appraisals performed by state certified third-party appraisers that had been updated in the preceding 12 months. The following table presents total non-accrual loans, by class segment, as of the following periods: June 30, 2020 December 31, 2019 Non-accrual Loans Non-accrual Loans With a Related Allowance Without a Related Allowance Total Total (in thousands) Real estate - commercial mortgage $ 24,638 $ 16,137 $ 40,775 $ 33,166 Commercial and industrial 18,222 21,157 39,379 48,106 Real estate - residential mortgage 15,634 1,256 16,890 16,676 Real estate - home equity 7,688 — 7,688 7,004 Real estate - construction 2,412 1,070 3,482 3,618 Equipment lease financing and other — 16,823 16,823 16,528 $ 68,594 $ 56,443 $ 125,037 $ 125,098 As of June 30, 2020, there were $56.4 million of non-accrual loans that did not have a related allowance for credit losses. The estimated fair values of the collateral securing these loans exceeded their carrying amount, or the loans were previously charged down to realizable collateral values. Accordingly, no specific valuation allowance was considered to be necessary. Asset Quality Maintaining an appropriate ACL is dependent on various factors, including the ability to identify potential problem loans in a timely manner. For commercial construction, residential construction, commercial and industrial, and commercial real estate, an internal risk rating process is used. The Corporation believes that internal risk ratings are the most relevant credit quality indicator for these types of loans. The migration of loans through the various internal risk categories is a significant component of the ACL methodology for these loans, under both the CECL and incurred loss models, which bases the probability of default on this migration. Assigning risk ratings involves judgment. The Corporation's loan review officers provide a separate assessment of risk rating accuracy. Risk ratings may be changed based on the ongoing monitoring procedures performed by loan officers or credit administration staff, or if specific loan review assessments identify a deterioration or an improvement in the loans. The following table summarizes designated internal risk categories by portfolio segment and loan class, by origination year, as of June 30, 2020: Term Loans Amortized Cost Basis by Origination Year Revolving Loans Revolving Loans converted to Term Loans (dollars in thousands) Amortized Amortized 2020 2019 2018 2017 2016 Prior Cost Basis Cost Basis Total Real estate - construction Pass $ 57,915 $ 229,899 $ 204,748 $ 140,877 $ 50,094 $ 126,187 $ 48,947 $ — $ 858,667 Special Mention — 534 — — 783 2,635 336 — 4,288 Substandard or Lower — 156 — — 778 5,601 760 — 7,295 Total real estate - construction 57,915 230,589 204,748 140,877 51,655 134,423 50,043 — 870,250 Real estate - construction Current period gross charge-offs — — — — — (17) — — (17) Current period recoveries — — — — — 70 — — 70 Current period net charge-offs — — — — — 53 — — 53 Commercial and industrial Pass 2,286,984 559,728 362,758 257,780 230,120 625,302 1,285,256 3,412 5,611,340 Special Mention 51,958 9,918 10,905 8,782 14,898 37,112 59,836 868 194,277 Substandard or Lower 30,171 1,193 13,353 14,186 12,712 25,173 68,283 512 165,583 Total commercial and industrial 2,369,113 570,839 387,016 280,748 257,730 687,587 1,413,375 4,792 5,971,200 Commercial and industrial loans Current period gross charge-offs — (107) (9) (55) (334) (210) (13,664) — (14,379) Current period recoveries 39 242 63 43 1,673 2,652 — 4,712 Current period net charge-offs — (68) 233 8 (291) 1,463 (11,012) — (9,667) Real estate - commercial mortgage Pass 459,245 935,899 791,164 894,358 918,394 2,554,653 81,448 5,812 6,640,973 Special Mention 755 4,819 18,187 30,164 16,142 101,456 3,207 — 174,730 Substandard or Lower 15 469 8,393 28,954 9,470 70,781 1,150 — 119,232 Total real estate - commercial 460,015 941,187 817,744 953,476 944,006 2,726,890 85,805 5,812 6,934,935 Real estate - commercial mortgage Current period gross charge-offs — (10) (16) (1,993) (11) (1,132) (17) — (3,179) Current period recoveries — — — — 1 338 — — 339 Current period net charge-offs — (10) (16) (1,993) (10) (794) (17) — (2,840) Total Pass $ 2,804,144 $ 1,725,526 $ 1,358,670 $ 1,293,015 $ 1,198,608 $ 3,306,142 $ 1,415,651 $ 9,224 $ 13,110,980 Special Mention 52,713 15,271 29,092 38,946 31,823 141,203 63,379 868 373,295 Substandard or Lower 30,186 1,818 21,746 43,140 22,960 101,555 70,193 512 292,110 Total $ 2,887,043 $ 1,742,615 $ 1,409,508 $ 1,375,101 $ 1,253,391 $ 3,548,900 $ 1,549,223 $ 10,604 $ 13,776,385 The information presented in the table above is not required for periods prior to the adoption of CECL. The following table presents the most comparable required information for the prior period, internal credit risk ratings for the indicated loan class segments as of December 31, 2019: Pass Special Mention Substandard or Lower Total (dollars in thousands) Real estate - commercial mortgage $ 6,429,407 $ 137,163 $ 134,206 $ 6,700,776 Commercial and industrial - secured 3,830,847 171,442 195,884 4,198,173 Commercial and industrial - unsecured 234,987 9,665 3,876 248,528 Total commercial and industrial 4,065,834 181,107 199,760 4,446,701 Construction - commercial residential 100,808 2,897 3,461 107,166 Construction - commercial 765,562 1,322 2,676 769,560 Total construction (excluding construction - other) 866,370 4,219 6,137 876,726 $ 11,361,611 $ 322,489 $ 340,103 $ 12,024,203 % of Total 94.5 % 2.7 % 2.8 % 100.0 % The Corporation does not assign internal risk ratings to smaller balance, homogeneous loans, such as home equity, residential mortgage, construction loans to individuals secured by residential real estate, consumer and equipment lease financing. For these loans, the most relevant credit quality indicator is delinquency status. The migration of loans through the various delinquency status categories is a significant component of the ACL methodology for those loans, under both the CECL and incurred loss models, which base the PD on this migration. The Corporation considers the performance of the loan portfolio and its impact on the ACL. For certain loans classes, the Corporation evaluates credit quality based on the aging status of the loan. The following table presents the amortized cost of these loans based on payment activity, by origination year, as of June 30, 2020: Term Loans Amortized Cost Basis by Origination Year Revolving Loans Revolving Loans converted to Term Loans (dollars in thousands) Amortized Amortized 2020 2019 2018 2017 2016 Prior Cost Basis Cost Basis Total Real estate - home equity Performing $ 13,718 $ 9,591 $ 15,464 $ 13,681 $ 15,006 $ 145,384 $ 1,018,865 $ 7,755 $ 1,239,464 Nonperforming — — 153 256 228 2,674 8,265 415 11,991 Total real estate - home equity 13,718 9,591 15,617 13,937 15,234 148,058 1,027,130 8,170 1,251,455 Real estate - home equity Current period gross charge-offs — — — (117) (23) (231) (374) — (745) Current period recoveries — — — — — 219 42 — 261 Current period net charge-offs — — — (117) (23) (12) (332) — (484) Real estate - residential mortgage Performing 554,061 660,974 311,804 438,785 320,134 553,448 — — 2,839,206 Nonperforming — 635 2,647 2,465 398 16,876 — — 23,021 Total real estate - residential mortgage 554,061 661,609 314,451 441,250 320,532 570,324 — — 2,862,227 Real estate - residential mortgage Current period gross charge-offs — (15) (100) (104) (6) (197) — — (422) Current period recoveries — — 10 1 1 185 — — 197 Current period net charge-offs — (15) (90) (103) (5) (12) — — (225) Consumer Performing 58,202 115,866 115,707 54,108 31,027 43,344 47,021 — 465,275 Nonperforming — — 73 42 31 42 147 — 335 Total consumer credit - other consumer loans 58,202 115,866 115,780 54,150 31,058 43,386 47,168 — 465,610 Consumer Current period gross charge-offs — (532) (335) (326) (303) (591) — — (2,087) Current period recoveries 83 89 143 51 43 625 — — 1,034 Current period net charge-offs 83 (443) (192) (275) (260) 34 — — (1,053) Equipment Lease Financing and Other Performing 63,153 76,157 54,353 39,435 16,132 2,537 — — 251,767 Nonperforming 1,526 — 207 16,048 299 296 — — 18,376 Total leasing and other 64,679 76,157 54,560 55,483 16,431 2,833 — — 270,143 Equipment Lease Financing and other Current period gross charge-offs (228) (460) — (95) — (438) — — (1,221) Current period recoveries 61 39 — 66 2 32 — — 200 Current period net charge-offs (167) (421) — (29) 2 (406) — — (1,021) Construction - other Performing 22,051 63,737 6,491 — 16 — 9,508 673 102,476 Nonperforming — — — 182 — — — — 182 Total leasing and other 22,051 63,737 6,491 182 16 — 9,508 673 102,658 Construction - other Current period gross charge-offs — — — — — — — — — Current period recoveries — — — — — — — — — Current period net charge-offs — — — — — — — — — Total Performing $ 711,185 $ 926,325 $ 503,819 $ 546,009 $ 382,315 $ 744,713 $ 1,075,394 $ 8,428 $ 4,898,188 Nonperforming 1,526 635 3,080 18,993 956 19,888 8,412 415 53,905 Total $ 712,711 $ 926,960 $ 506,899 $ 565,002 $ 383,271 $ 764,601 $ 1,083,806 $ 8,843 $ 4,952,093 The information presented in the table above is not required for periods prior to the adoption of CECL. The following table presents the most comparable required information for the prior period, a summary of performing, delinquent and non-performing loans for the indicated class segments: December 31, 2019 Performing Delinquent (1) Non-performing (2) Total (dollars in thousands) Real estate - home equity $ 1,292,035 $ 12,341 $ 10,568 $ 1,314,944 Real estate - residential mortgage 2,584,763 34,291 22,411 2,641,465 Construction - other 92,649 895 809 94,353 Consumer - direct 63,582 465 190 64,237 Consumer - indirect 393,974 4,685 268 398,927 Total consumer 457,556 5,150 458 463,164 Equipment lease financing and other 278,743 4,012 16,642 299,397 $ 4,705,746 $ 56,689 $ 50,888 $ 4,813,323 % of Total 97.8 % 1.2 % 1.0 % 100 % (1) Includes all accruing loans 30 days to 89 days past due. (2) Includes all accruing loans 90 days or more past due and all non-accrual loans. The following table presents non-performing assets: June 30, December 31, (in thousands) Non-accrual loans $ 125,037 $ 125,098 Loans 90 days or more past due and still accruing 14,767 16,057 Total non-performing loans 139,804 141,155 OREO (1) 5,418 6,831 Total non-performing assets $ 145,222 $ 147,986 (1) Excludes $10.6 million of residential mortgage properties for which formal foreclosure proceedings were in process as of June 30, 2020. The following tables present the aging of the amortized cost basis of loans, by class segment: 30-59 60-89 ≥ 90 Days Days Past Days Past Past Due Non- Due Due and Accruing Accrual Current Total (in thousands) June 30, 2020 Real estate – commercial mortgage $ 16,431 $ 1,190 $ 1,599 $ 40,775 $ 6,874,941 $ 6,934,936 Commercial and industrial 2,970 1,215 351 39,379 5,927,286 5,971,201 Real estate – residential mortgage 11,401 5,761 5,997 16,890 2,822,177 2,862,226 Real estate – home equity 3,431 1,593 3,889 7,688 1,234,854 1,251,455 Real estate – construction 2,606 414 1,043 3,482 965,364 972,909 Consumer 1,851 471 334 — 462,954 465,610 Equipment lease financing and other 795 216 1,554 16,823 226,997 246,385 Total $ 39,485 $ 10,860 $ 14,767 $ 125,037 $ 18,514,573 $ 18,704,722 30-59 Days Past 60-89 ≥ 90 Days Non- Current Total (in thousands) December 31, 2019 Real estate – commercial mortgage $ 10,912 $ 1,543 $ 4,113 $ 33,166 $ 6,651,042 $ 6,700,776 Commercial and industrial 2,302 2,630 1,385 48,106 4,392,278 4,446,701 Real estate – residential mortgage 26,982 7,309 5,735 16,676 2,584,763 2,641,465 Real estate – home equity 9,635 2,706 3,564 7,004 1,292,035 1,314,944 Real estate – construction 1,715 900 688 3,618 964,158 971,079 Consumer 4,228 922 458 — 457,556 463,164 Equipment lease financing and other 552 3,460 114 16,528 278,743 299,397 Total $ 56,326 $ 19,470 $ 16,057 $ 125,098 $ 16,620,575 $ 16,837,526 Collateral-Dependent Loans A financial asset is considered to be collateral-dependent when the debtor is experiencing financial difficulty and repayment is expected to be provided substantially through the sale or operation of the collateral. For all classes of financial assets deemed collateral-dependent, the Corporation elected the practical expedient to estimate expected credit losses based on the collateral’s fair value less cost to sell. In most cases, the Corporation records a partial charge-off to reduce the loan’s carrying value to the collateral’s fair value less cost to sell. Substantially all of the collateral supporting collateral-dependent financial assets consists of various types of real estate including residential properties; commercial properties such as retail centers, office buildings, and lodging; agriculture land; and vacant land. Troubled Debt Restructurings The following table presents TDRs, by class segment: June 30, December 31, (in thousands) Real estate - residential mortgage $ 28,030 $ 21,551 Real estate - commercial mortgage 20,407 13,330 Real estate - home equity 15,548 15,068 Commercial and industrial 4,398 5,193 Consumer — 8 Total accruing TDRs 68,383 55,150 Non-accrual TDRs (1) 31,575 20,825 Total TDRs $ 99,958 $ 75,975 (1) Included in non-accrual loans in the preceding table detailing non-performing assets. The following table presents TDRs, by class segment, for loans that were modified during the three and six months ended June 30, 2020 and 2019: Three months ended June 30 Six months ended June 30 2020 2019 2020 2019 Number of Loans Recorded Investment Number of Loans Recorded Investment Number of Loans Recorded Investment Number of Loans Recorded Investment (dollars in thousands) Real estate - residential mortgage 33 $ 8,505 1 $ 516 40 $ 9,165 5 $ 1,433 Real estate - commercial mortgage 6 16,082 2 1,785 7 16,474 2 1,785 Real estate - home equity 19 1,609 22 1,125 27 2,186 34 1,954 Commercial and industrial 13 1,304 4 586 14 1,378 8 3,046 Consumer 8 185 — — 8 185 — — Total 79 $ 27,685 29 $ 4,012 96 $ 29,388 49 $ 8,218 Restructured loan modifications may include payment schedule modifications, interest rate concessions, bankruptcies, principal reduction or some combination of these concessions. The restructured loan modifications primarily included maturity date extensions, rate modifications and payment schedule modifications. In accordance with regulatory guidance, payment schedule modifications granted after March 13, 2020 to borrowers impacted by the effects of the COVID-19 pandemic and who were not delinquent at the time of the payment schedule modifications have been excluded from TDRs. For the six months ended June 30, 2020, payment schedule modifications having a recorded investment of $3.9 billion were excluded from TDRs based on this regulatory guidance.

Mortgage Servicing Rights

Mortgage Servicing Rights	6 Months Ended
	Jun. 30, 2020
Transfers and Servicing [Abstract]
Mortgage Servicing Rights	Mortgage Servicing Rights The following table summarizes the changes in MSRs, which are included in other assets on the consolidated balance sheets: Three months ended June 30 Six months ended June 30 2020 2019 2020 2019 (in thousands) Amortized cost: Balance at beginning of period $ 38,854 $ 38,504 $ 39,267 $ 38,573 Originations of MSRs 2,772 1,861 4,250 3,086 Amortization (2,934) (1,539) (4,825) (2,833) Balance at end of period $ 38,692 $ 38,826 $ 38,692 $ 38,826 Valuation allowance: Balance at beginning of period $ (1,100) $ — $ — $ — Additions to valuation allowance (6,600) — (7,700) — Balance at end of period $ (7,700) $ — $ (7,700) $ — Net MSRs at end of period $ 30,992 $ 38,826 $ 30,992 $ 38,826 Estimated fair value of MSRs at end of period $ 30,992 $ 44,916 $ 30,992 $ 44,916 MSRs represent the economic value of contractual rights to service mortgage loans that have been sold. The total portfolio of loans serviced by the Corporation for unrelated third parties was $4.8 billion and $4.9 billion as of June 30, 2020 and December 31, 2019, respectively. Actual and expected prepayments of the underlying mortgage loans can impact the fair values of the MSRs. The Corporation accounts for MSRs at the lower of amortized cost or fair value.

Derivative Financial Instrument

Derivative Financial Instruments	6 Months Ended
	Jun. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments The Corporation manages its exposure to certain interest rate and foreign currency risks through the use of derivatives. None of the Corporation's outstanding derivative contracts are designated as hedges, and none are entered into for speculative purposes. Derivative instruments are carried at fair value, with changes in fair value recognized in earnings as components of non-interest income or non-interest expense on the consolidated statements of income. Derivative contracts create counterparty credit risk with both the Corporation's customers and with institutional derivative counterparties. The Corporation manages counterparty credit risk through its credit approval processes, monitoring procedures and obtaining adequate collateral, when the Corporation determines it is appropriate to do so and in accordance with counterparty contracts. For each of the derivatives, gross derivative assets and liabilities are recorded in other assets and other liabilities, respectively, on the consolidated balance sheets. Related gains and losses on these derivative instruments are recorded in other changes, net on the consolidated statement of cash flows. Mortgage Banking Derivatives In connection with its mortgage banking activities, the Corporation enters into commitments to originate certain fixed-rate residential mortgage loans for customers, also referred to as interest rate locks. In addition, the Corporation enters into forward commitments for the future sales or purchases of mortgage-backed securities to or from third-party counterparties to hedge the effect of changes in interest rates on the values of both the interest rate locks and mortgage loans held for sale. Forward sales commitments may also be in the form of commitments to sell individual mortgage loans at a fixed price at a future date. The amount necessary to settle each interest rate lock is based on the price that secondary market investors would pay for loans with similar characteristics, including interest rate and term, as of the date fair value is measured. Interest Rate Swaps The Corporation enters into interest rate swaps with certain qualifying commercial loan customers to meet their interest rate risk management needs. The Corporation simultaneously enters into interest rate swaps with dealer counterparties, with identical notional amounts and terms. The net result of these interest rate swaps is that the customer pays a fixed rate of interest and the Corporation receives a floating rate. The Corporation is required to clear all eligible interest rate swap contracts with a central counterparty and is subject to the regulations of the Commodity Futures Trading Commission. Foreign Exchange Contracts The Corporation enters into foreign exchange contracts to accommodate the needs of its customers. Foreign exchange contracts are commitments to buy or sell foreign currency on a specific date at a contractual price. The Corporation limits its foreign exchange exposure with customers by entering into contracts with institutional counterparties to mitigate its foreign exchange risk. The Corporation also holds certain amounts of foreign currency with international correspondent banks ("Foreign Currency Nostro Accounts"). The Corporation limits the total overnight net foreign currency open positions, which is defined as an aggregate of all outstanding contracts and Foreign Currency Nostro Account balances, to $500,000. The following table presents a summary of the notional amounts and fair values of derivative financial instruments: June 30, 2020 December 31, 2019 Notional Asset Notional Asset (in thousands) Interest Rate Locks with Customers Positive fair values $ 463,202 $ 10,614 $ 132,260 $ 1,123 Negative fair values 6,003 (51) 9,783 (53) Forward Commitments Positive fair values — — 75,000 63 Negative fair values 395,515 (2,057) 180,000 (371) Interest Rate Swaps with Customers Positive fair values 3,587,221 390,701 2,903,489 143,484 Negative fair values 12,288 (4) 376,705 (695) Interest Rate Swaps with Dealer Counterparties Positive fair values 12,288 4 376,705 695 Negative fair values 3,587,221 (188,515) 2,903,489 (75,327) Foreign Exchange Contracts with Customers Positive fair values 7,174 79 3,373 38 Negative fair values 5,248 (92) 7,283 (154) Foreign Exchange Contracts with Correspondent Banks Positive fair values 10,090 137 9,028 192 Negative fair values 5,774 (76) 4,976 (45) The following table presents a summary of the fair value gains (losses) on derivative financial instruments: Consolidated Statements of Income Classification Three months ended June 30 Six months ended June 30 2020 2019 2020 2019 (in thousands) Mortgage banking derivatives (1) Mortgage banking income $ 6,704 $ (48) $ 7,744 $ 614 Interest rate swaps Other expense 10 296 82 147 Foreign exchange contracts Other income (102) (14) 17 34 Net fair value gains on derivative financial instruments $ 6,612 $ 234 $ 7,843 $ 795 (1) Includes interest rate locks with customers and forward commitments. Fair Value Option The Corporation has elected to measure mortgage loans held for sale at fair value. The following table presents a summary of mortgage loans held for sale and the impact of the fair value election on the consolidated financial statements as of the periods shown: June 30, December 31, (in thousands) Amortized cost (1) $ 74,868 $ 37,396 Fair value 77,415 37,828 (1) Cost basis of mortgage loans held for sale represents the unpaid principal balance. Gains related to changes in fair values of mortgage loans held for sale were $1.4 million and $304,000 for the three months ended June 30, 2020 and 2019, respectively. During the six months ended June 30, 2020 and 2019, gains related to changes in fair values of mortgage loans held for sale were $2.1 million and $325,000, respectively Balance Sheet Offsetting Although certain financial assets and liabilities may be eligible for offset on the consolidated balance sheets because they are subject to master netting arrangements or similar agreements, the Corporation elects to not offset such qualifying assets and liabilities. The Corporation is a party to interest rate swaps with financial institution counterparties and customers. Under these agreements, the Corporation has the right to net-settle multiple contracts with the same counterparty in the event of default on, or termination of, any one contract. Cash collateral is posted by the party with a net liability position in accordance with contract thresholds and can be used to settle the fair value of the interest rate swap agreements in the event of default. A daily settlement occurs through a clearing agent for changes in the fair value of centrally cleared derivatives. Not all of the derivatives are required to be cleared daily through a clearing agent. As a result, the total fair values of interest rate swap derivative assets and derivative liabilities recognized on the consolidated balance sheet are not equal and offsetting. The Corporation is also a party to foreign currency exchange contracts with financial institution counterparties, under which the Corporation has the right to net-settle multiple contracts with the same counterparty in the event of default on, or termination of, any one contract. As with interest rate swaps, collateral is posted by the party with a net liability position in accordance with contract thresholds and can be used to settle the fair value of the foreign currency exchange contracts in the event of default. The Corporation also enters into agreements with customers in which it sells securities subject to an obligation to repurchase the same or similar securities, referred to as repurchase agreements. Under these agreements, the Corporation may transfer legal control over the assets but still maintain effective control through agreements that both entitle and obligate the Corporation to repurchase the assets. Therefore, repurchase agreements are reported as secured borrowings, classified in short-term borrowings on the consolidated balance sheets, while the securities underlying the repurchase agreements remain classified with investment securities on the consolidated balance sheets. The Corporation has no intent to set off these amounts, therefore, these repurchase agreements are not eligible for offset. The following table presents the Corporation's financial instruments that are eligible for offset, and the effects of offsetting, on the consolidated balance sheets: Gross Amounts Gross Amounts Not Offset Recognized on the Consolidated on the Balance Sheets Consolidated Financial Cash Net Balance Sheets Instruments (1) Collateral (2) Amount (in thousands) June 30, 2020 Interest rate swap derivative assets $ 390,706 $ (4) $ — $ 390,702 Foreign exchange derivative assets with correspondent banks 137 (76) — 61 Total $ 390,843 $ (80) $ — $ 390,763 Interest rate swap derivative liabilities $ 188,519 $ (4) $ (188,515) $ — Foreign exchange derivative liabilities with correspondent banks 76 (76) — — Total $ 188,595 $ (80) $ (188,515) $ — December 31, 2019 Interest rate swap derivative assets $ 144,179 $ (757) $ — $ 143,422 Foreign exchange derivative assets with correspondent banks 192 (45) — 147 Total $ 144,371 $ (802) $ — $ 143,569 Interest rate swap derivative liabilities $ 76,022 $ (757) $ (75,265) $ — Foreign exchange derivative liabilities with correspondent banks 45 (45) — — Total $ 76,067 $ (802) $ (75,265) $ — (1) For interest rate swap assets, amounts represent any derivative liability fair values that could be offset in the event of counterparty or customer default. For interest rate swap liabilities, amounts represent any derivative asset fair values that could be offset in the event of counterparty or customer default. (2) Amounts represent cash collateral received from the counterparty or posted by the Corporation on interest rate swap transactions and foreign exchange contracts with financial institution counterparties. Interest rate swaps with customers are collateralized by the same collateral securing the underlying loans to those borrowers. Cash and securities collateral amounts are included in the table only to the extent of the net derivative fair values.

Tax Credit Investments

Tax Credit Investments	6 Months Ended
	Jun. 30, 2020
Income Tax Disclosure [Abstract]
Tax Credit Investments	Tax Credit Investments TCIs are primarily for investments promoting qualified affordable housing projects and investments in community development entities. Investments in these projects generate a return primarily through the realization of federal income tax credits and deductions for operating losses over a specified time period. The TCIs are included in other assets, with any unfunded equity commitments recorded in other liabilities on the consolidated balance sheets. Certain TCIs qualify for the proportional amortization method and are amortized over the period the Corporation expects to receive the tax credits, with the expense included within income taxes on the consolidated statements of income. Other TCIs are accounted for under the equity method of accounting, with amortization included within non-interest expense on the consolidated statements of income. This amortization includes equity in partnership losses and the systematic write-down of investments over the period in which income tax credits are earned. All of the TCIs are evaluated for impairment at the end of each reporting period. The following table presents the balances of the Corporation's TCIs and related unfunded commitments: June 30, December 31, 2020 2019 Included in other assets: (in thousands) Affordable housing tax credit investment, net $ 139,956 $ 153,351 Other tax credit investments, net 62,932 64,354 Total TCIs, net $ 202,888 $ 217,705 Included in other liabilities: Unfunded affordable housing tax credit commitments $ 12,513 $ 16,684 Other tax credit liabilities 54,823 55,105 Total unfunded tax credit commitments and liabilities $ 67,336 $ 71,789 The following table presents other information relating to the Corporation's TCIs: Three Months Ended Six Months Ended June 30 June 30 2020 2019 2020 2019 Components of income taxes: (in thousands) Affordable housing tax credits and other tax benefits $ (7,194) $ (7,575) $ (14,388) $ (15,150) Other tax credit investment credits and tax benefits (941) (1,135) (1,882) (2,271) Amortization of affordable housing investments, net of tax benefit 5,023 5,494 10,047 10,989 Deferred tax expense 208 239 416 477 Total net reduction in income tax expense $ (2,904) $ (2,977) $ (5,807) $ (5,955) Amortization of TCIs: Affordable housing tax credits investment $ 1,022 $ 823 $ 2,044 $ 1,645 Other tax credit investment amortization 428 669 856 1,338 Total amortization of TCIs $ 1,450 $ 1,492 $ 2,900 $ 2,983

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	6 Months Ended
	Jun. 30, 2020
Equity [Abstract]
Accumulated Other Comprehensive Income	Accumulated Other Comprehensive Income The following table presents changes in other comprehensive income: Before-Tax Amount Tax Effect Net of Tax Amount Three months ended June 30, 2020 (in thousands) Unrealized gain on securities $ 44,199 $ (9,775) $ 34,424 Reclassification adjustment for securities gains included in net income (1) (3,005) 664 (2,341) Amortization of net unrealized losses on AFS securities transferred to HTM (2) 1,019 (226) 793 Amortization of net unrecognized pension and postretirement items (3) 328 (73) 255 Total Other Comprehensive Income $ 42,541 $ (9,410) $ 33,131 Three months ended June 30, 2019 Unrealized gain on securities $ 31,994 $ (7,077) $ 24,917 Reclassification adjustment for securities gains included in net income (1) (176) 39 (137) Amortization of net unrealized losses on AFS securities transferred to HTM (2) 1,311 (290) 1,021 Non-credit related unrealized losses on other-than-temporarily impaired debt securities (770) 170 (600) Amortization of net unrecognized pension and postretirement items (3) 353 (78) 275 Total Other Comprehensive Income $ 32,712 $ (7,236) $ 25,476 Six months ended June 30, 2020 Unrealized gain on securities (3) $ 66,581 $ (14,728) $ 51,853 Reclassification adjustment for securities gains included in net income (1) (3,051) 675 (2,376) Amortization of net unrealized losses on AFS securities transferred to HTM (2) (3) 2,040 (451) 1,589 Amortization of net unrecognized pension and postretirement items (4) 656 (146) 510 Total Other Comprehensive Income $ 66,226 $ (14,650) $ 51,576 Six months ended June 30, 2019 Unrealized gain on securities $ 58,056 $ (12,841) $ 45,215 Reclassification adjustment for securities gains included in net income (1) (241) 53 (188) Amortization of net unrealized losses on AFS securities transferred to HTM (2) 2,563 (568) 1,995 Non-credit related unrealized losses on other-than-temporarily impaired debt securities (875) 193 (682) Amortization of net unrecognized pension and postretirement items (3) 727 (161) 566 Total Other Comprehensive Income $ 60,230 $ (13,324) $ 46,906 (1) Amounts reclassified out of accumulated other comprehensive income. Before-tax amounts included in "Investment securities gains, net" on the Consolidated Statements of Income. See Note 3, "Investment Securities," for additional details. (2) Amounts reclassified out of accumulated other comprehensive income. Before-tax amounts included as a reduction to "Interest Income" on the Consolidated Statements of Income. (3) Amounts reclassified out of accumulated other comprehensive income. Before-tax amounts included in "Salaries and employee benefits" on the Consolidated Statements of Income. See Note 12, "Employee Benefit Plans," for additional details. The following table presents changes in each component of accumulated other comprehensive income (loss), net of tax: Unrealized Gains (Losses) on Investment Securities Unrealized Non-Credit Gains (Losses) on Other-Than-Temporarily Impaired Debt Securities Unrecognized Pension and Postretirement Plan Income (Costs) Total (in thousands) Three months ended June 30, 2020 Balance at March 31, 2020 $ 33,054 $ — $ (14,746) $ 18,308 Other comprehensive income before reclassifications 34,424 — — 34,424 Amounts reclassified from accumulated other comprehensive income (2,341) — 255 (2,086) Amortization of net unrealized losses on AFS securities transferred to HTM 793 — — 793 Balance at June 30, 2020 $ 65,930 $ — $ (14,491) $ 51,439 Three months ended June 30, 2019 Balance at March 31, 2019 $ (23,433) $ 598 $ (14,798) $ (37,633) Other comprehensive income before reclassifications 24,917 (600) — 24,317 Amounts reclassified from accumulated other comprehensive income (137) — 275 138 Amortization of net unrealized losses on AFS securities transferred to HTM 1,021 — — 1,021 Balance at June 30, 2019 $ 2,368 $ (2) $ (14,523) $ (12,157) Six months ended June 30, 2020 Balance at December 31, 2019 $ 14,864 $ — $ (15,001) $ (137) Other comprehensive income before reclassifications 51,853 — — 51,853 Amounts reclassified from accumulated other comprehensive income (2,376) — 510 (1,866) Amortization of net unrealized losses on AFS securities transferred to HTM 1,589 — — 1,589 Balance at June 30, 2020 $ 65,930 $ — $ (14,491) $ 51,439 Six months ended June 30, 2019 Balance at December 31, 2018 $ (44,654) $ 680 $ (15,089) $ (59,063) Other comprehensive income before reclassifications 45,215 (682) — 44,533 Amounts reclassified from accumulated other comprehensive income (188) — 566 378 Amortization of net unrealized losses on AFS securities transferred to HTM 1,995 — — 1,995 Balance at June 30, 2019 $ 2,368 $ (2) $ (14,523) $ (12,157)

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2020
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements FASB ASC Topic 820 establishes a fair value hierarchy for the inputs to valuation techniques used to measure assets and liabilities at fair value using the following three categories (from highest to lowest priority): • Level 1 – Inputs that represent quoted prices for identical instruments in active markets. • Level 2 – Inputs that represent quoted prices for similar instruments in active markets, or quoted prices for identical instruments in non-active markets. Also includes valuation techniques whose inputs are derived principally from observable market data other than quoted prices, such as interest rates or other market-corroborated means. • Level 3 – Inputs that are largely unobservable, as little or no market data exists for the instrument being valued. All assets and liabilities measured at fair value on both a recurring and nonrecurring basis, have been categorized into the above three levels. The following tables present assets and liabilities measured at fair value on a recurring basis and reported on the consolidated balance sheets: June 30, 2020 Level 1 Level 2 Level 3 Total (in thousands) Loans held for sale $ — $ 77,415 $ — $ 77,415 Available for sale investment securities: State and municipal securities — 893,682 — 893,682 Corporate debt securities — 325,353 — 325,353 Collateralized mortgage obligations — 578,394 — 578,394 Residential mortgage-backed securities — 160,868 — 160,868 Commercial mortgage-backed securities — 585,143 — 585,143 Auction rate securities — — 100,859 100,859 Total available for sale investment securities — 2,543,440 100,859 2,644,299 Other assets: Investments held in Rabbi Trust 20,555 — — 20,555 Derivative assets 216 401,319 — 401,535 Total assets $ 20,771 $ 3,022,174 $ 100,859 $ 3,143,804 Other liabilities: Deferred compensation liabilities $ 20,555 $ — $ — $ 20,555 Derivative liabilities 168 190,627 — 190,795 Total liabilities $ 20,723 $ 190,627 $ — $ 211,350 December 31, 2019 Level 1 Level 2 Level 3 Total (in thousands) Loans held for sale $ — $ 37,828 $ — $ 37,828 Available for sale investment securities: State and municipal securities — 652,927 — 652,927 Corporate debt securities — 374,957 2,400 377,357 Collateralized mortgage obligations — 693,718 — 693,718 Residential mortgage-backed securities — 177,312 — 177,312 Commercial mortgage-backed securities — 494,297 — 494,297 Auction rate securities — — 101,926 101,926 Total available for sale investment securities — 2,393,211 104,326 2,497,537 Other assets: Investments held in Rabbi Trust 22,213 — — 22,213 Derivative assets 230 145,365 — 145,595 Total assets $ 22,443 $ 2,576,404 $ 104,326 $ 2,703,173 Other liabilities: Deferred compensation liabilities $ 22,213 $ — $ — $ 22,213 Derivative liabilities 199 76,447 — 76,646 Total liabilities $ 22,412 $ 76,447 $ — $ 98,859 The valuation techniques used to measure fair value for the items in the preceding tables are as follows: Loans held for sale – This category includes mortgage loans held for sale that are measured at fair value. Fair values as of June 30, 2020 and December 31, 2019 were based on the price that secondary market investors were offering for loans with similar characteristics. See "Note 6 - Derivative Financial Instruments" for details related to the Corporation’s election to measure assets and liabilities at fair value. Available for sale investment securities – Included in this asset category are debt securities. Level 2 investment securities are valued by a third-party pricing service commonly used in the banking industry. The pricing service uses pricing models that vary based on asset class and incorporate available market information, including quoted prices of investment securities with similar characteristics. Because many fixed income securities do not trade on a daily basis, pricing models use available information, as applicable, through processes such as benchmark yield curves, benchmarking of like securities, sector groupings and matrix pricing. Standard market inputs include: benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers and reference data, including market research publications. For certain security types, additional inputs may be used, or some of the standard market inputs may not be applicable. Management tests the values provided by the pricing service by obtaining securities prices from an alternative third-party source and comparing the results. This test is performed for at least 95% of the securities valued by the pricing service. Generally, differences by security in excess of 5% are researched to reconcile the difference. • State and municipal securities/Collateralized mortgage obligations/Residential mortgage-backed securities/Commercial mortgage-backed securities – These debt securities are classified as Level 2. Fair values are determined by a third-party pricing service, as detailed above. • Corporate debt securities – This category consists of subordinated debt and senior debt issued by financial institutions ($321.0 million at June 30, 2020 and $362.3 million at December 31, 2019), single-issuer trust preferred securities issued by financial institutions ($0 at June 30, 2020 and $11.2 million at December 31, 2019) and other corporate debt issued by non-financial institutions ($4.4 million at June 30, 2020 and $3.9 million December 31, 2019). As noted in "Note 3 - Investment Securities", several corporate debt securities were sold in the second quarter of 2020. Refer to the specific note for further information. Level 2 investment securities include the Corporation’s holdings of subordinated debt and senior debt, other corporate debt issued by non-financial institutions and $0 and $8.8 million of single-issuer TruPS held at June 30, 2020 and December 31, 2019, respectively. The fair values for these corporate debt securities are determined by a third-party pricing service, as detailed above. Level 3 investment securities include the Corporation’s investments in certain single-issuer TruPS ($0 at June 30, 2020 and $2.4 million at December 31, 2019). The fair values of these securities were determined based on quotes provided by third-party brokers who determined fair values based predominantly on internal valuation models which were not indicative prices or binding offers. The Corporation’s third-party pricing service cannot derive fair values for these securities primarily due to inactive markets for similar investments. Level 3 values are tested by management primarily through trend analysis, by comparing current values to those reported at the end of the preceding calendar quarter, and determining if they are reasonable based on price and spread movements for this asset class. • Auction rate securities – Due to their illiquidity, ARCs are classified as Level 3 investment securities and are valued through the use of an expected cash flows model prepared by a third-party valuation expert. The assumptions used in preparing the expected cash flows model include estimates for coupon rates, time to maturity and market rates of return. The most significant unobservable input to the expected cash flows model is an assumed return to market liquidity sometime in the next five years. If the assumed return to market liquidity was lengthened beyond the next five years, this would result in a decrease in the fair value of these ARCs. The Corporation believes that the trusts underlying the ARCs will self-liquidate as student loans are repaid. Level 3 fair values are tested by management through the performance of a trend analysis of the market price and discount rate. Changes in the price and discount rates are compared to changes in market data, including bond ratings, parity ratios, balances and delinquency levels. Investments held in Rabbi Trust – This category consists of mutual funds that are held in trust for employee deferred compensation plans that the Corporation has elected to measure at fair value. Shares of mutual funds are valued based on net asset value, which represent quoted market prices for the underlying shares held in the mutual funds, and as such, are classified as Level 1. Derivative assets – Fair value of foreign currency exchange contracts classified as Level 1 assets ($216,000 at June 30, 2020 and $230,000 at December 31, 2019). The mutual funds and foreign exchange prices used to measure these items at fair value are based on quoted prices for identical instruments in active markets. Level 2 assets, representing the fair value of mortgage banking derivatives in the form of interest rate locks and forward commitments with secondary market investors ($10.6 million at June 30, 2020 and $1.2 million at December 31, 2019) and the fair value of interest rate swaps ($390.7 million at June 30, 2020 and $144.2 million at December 31, 2019). The fair values of the Corporation’s interest rate locks, forward commitments and interest rate swaps represent the amounts that would be required to settle the derivative financial instruments at the balance sheet date. See "Note 6 - Derivative Financial Instruments," for additional information. Deferred compensation liabilities – Fair value of amounts due to employees under deferred compensation plans, classified as Level 1 liabilities and are included in other liabilities on the consolidated balance sheets. The fair values of these liabilities are determined in the same manner as the related assets, as described under the heading "Investments held in Rabbi Trust" above. Derivative liabilities – Level 1 liabilities, representing the fair value of foreign currency exchange contracts ($168,000 at June 30, 2020 and $199,000 at December 31, 2019). Level 2 liabilities, representing the fair value of mortgage banking derivatives in the form of interest rate locks and forward commitments with secondary market investors ($2.1 million at June 30, 2020 and $424,000 at December 31, 2019) and the fair value of interest rate swaps ($188.5 million at June 30, 2020 and $76.0 million at December 31, 2019). The fair values of these liabilities are determined in the same manner as the related assets, as described under the heading "Derivative assets" above. The following table presents the changes in the Corporation’s available for sale investment securities measured at fair value on a recurring basis using unobservable inputs (Level 3): Pooled Trust Single-issuer ARCs Three months ended June 30, 2020 (in thousands) Balance at March 31, 2020 $ — $ 2,160 $ 93,666 Sales — (2,160) — Unrealized adjustment to fair value (1) — — 7,193 Balance at June 30, 2020 $ — $ — $ 100,859 Three months ended June 30, 2019 Balance at March 31, 2019 $ 770 $ 2,430 $ 102,810 Sales (770) — — Unrealized adjustment to fair value (1) — (60) 555 Balance at June 30, 2019 $ — $ 2,370 $ 103,365 Six months ended June 30, 2020 Balance at December 31, 2019 $ — $ 2,400 $ 101,926 Sales — (2,160) — Unrealized adjustment to fair value (1) — (242) (1,067) Discount accretion — 2 — Balance at June 30, 2020 $ — $ — $ 100,859 Six months ended June 30, 2019 Balance at December 31, 2018 $ 875 $ 2,400 $ 102,994 Sales (770) — — Unrealized adjustment to fair value (1) (105) (30) 371 Balance at June 30, 2019 $ — $ 2,370 $ 103,365 (1) Pooled trust preferred securities, single-issuer trust preferred securities and ARCs are classified as available for sale investment securities; as such, the unrealized adjustment to fair value was recorded as an unrealized holding gain (loss) and included as a component of "available for sale at estimated fair value" on the consolidated balance sheets. Certain assets are not measured at fair value on an ongoing basis, but are subject to fair value measurement in certain circumstances, such as upon their acquisition or when there is evidence of impairment. The following table presents Level 3 financial assets measured at fair value on a nonrecurring basis: June 30, 2020 December 31, 2019 (in thousands) Net Loans $ 108,746 $ 144,807 OREO 5,418 6,831 MSRs (1) 30,992 45,193 Total assets $ 145,156 $ 196,831 (1) Amounts shown are estimated fair value. MSRs are recorded on the Corporation's consolidated balance sheets at lower of amortized cost or fair value. See "Note 5 - Mortgage Servicing Rights" for additional information. The valuation techniques used to measure fair value for the items in the table above are as follows: • Net Loans – This category consists of loans that were individually evaluated for impairment and have been classified as Level 3 assets. In 2020, the amount shown is the balance of nonaccrual loans, net of the related ACL. In 2019, the amount shown is the balance of impaired loans, net of the related ACL. See "Note 4 - Allowance for Credit Losses and Asset Quality," for additional details. • OREO – This category consists of OREO classified as Level 3 assets, for which the fair values were based on estimated selling prices less estimated selling costs for similar assets in active markets. • MSRs - This category consists of MSRs, which were initially recorded at fair value upon the sale of residential mortgage loans to secondary market investors, and subsequently carried at the lower of amortized cost or fair value. MSRs are amortized as a reduction to servicing income over the estimated lives of the underlying loans. MSRs are stratified and evaluated for impairment by comparing each stratum's carrying amount to its estimated fair value. Fair values are determined at the end of each quarter through a discounted cash flows valuation performed by a third-party valuation expert. Significant inputs to the valuation included expected net servicing income, the discount rate and the expected life of the underlying loans. Expected life is based on the contractual terms of the loans, as adjusted for prepayment projections. The weighted average annual constant prepayment rate and the weighted average discount rate used in the June 30, 2020 valuation were 17.5% and 9.5%, respectively. Management tests the reasonableness of the significant inputs to the third-party valuation in comparison to market data. See "Note 5 - Mortgage Servicing Rights," for additional information. In 2008, the Corporation received Class B restricted shares of Visa, Inc. ("Visa") as part of Visa’s initial public offering. These securities are considered equity securities without readily determinable fair values. As such, the approximately 133,000 Visa Class B shares owned as of June 30, 2020 were carried at a zero cost basis. The following tables present the carrying amounts and estimated fair values of the Corporation’s financial instruments as of the periods shown. A general description of the methods and assumptions used to estimate such fair values follows: June 30, 2020 Estimated Fair Value Carrying Amount Level 1 Level 2 Level 3 Total (in thousands) FINANCIAL ASSETS Cash and cash equivalents $ 1,058,599 $ 1,058,599 $ — $ — $ 1,058,599 FRB and FHLB stock 91,042 — 91,042 — 91,042 Loans held for sale 77,415 — 77,415 — 77,415 AFS securities 2,644,299 — 2,543,440 100,859 2,644,299 HTM securities 330,514 — 354,109 — 354,109 Net Loans 18,448,185 — — 18,173,117 18,173,117 Accrued interest receivable 73,720 73,720 — — 73,720 Other assets 706,518 268,789 401,319 36,410 706,518 FINANCIAL LIABILITIES Demand and savings deposits $ 17,006,353 $ 17,006,353 $ — $ — $ 17,006,353 Brokered deposits 310,689 268,618 42,071 — 310,689 Time deposits 2,567,166 — 2,599,932 — 2,599,932 Short-term borrowings 572,551 572,551 — — 572,551 Accrued interest payable 11,571 11,571 — — 11,571 FHLB advances and long-term debt 1,295,196 — 1,342,497 — 1,342,497 Other liabilities 369,624 162,614 190,627 16,383 369,624 December 31, 2019 Estimated Fair Value Carrying Amount Level 1 Level 2 Level 3 Total (in thousands) FINANCIAL ASSETS Cash and cash equivalents $ 517,791 $ 517,791 $ — $ — $ 517,791 FRB and FHLB stock 97,422 — 97,422 — 97,422 Loans held for sale 37,828 — 37,828 — 37,828 AFS securities 2,497,537 — 2,393,211 104,326 2,497,537 HTM securities 369,841 — 383,705 — 383,705 Net Loans 16,673,904 — — 16,485,122 16,485,122 Accrued interest receivable 60,898 60,898 — — 60,898 Other assets 431,565 234,176 145,365 52,024 431,565 FINANCIAL LIABILITIES Demand and savings deposits $ 14,327,453 $ 14,327,453 $ — $ — $ 14,327,453 Brokered deposits 264,531 223,982 40,549 — 264,531 Time deposits 2,801,930 — 2,828,988 — 2,828,988 Short-term borrowings 883,241 883,241 — — 883,241 Accrued interest payable 8,834 8,834 — — 8,834 FHLB advances and long-term debt 881,769 — 878,385 — 878,385 Other liabilities 221,542 142,508 76,447 2,587 221,542 Fair values of financial instruments are significantly affected by the assumptions used, principally the timing of future cash flows and discount rates. Because assumptions are inherently subjective in nature, the estimated fair values cannot be substantiated by comparison to independent market quotes and, in many cases, the estimated fair values could not necessarily be realized in an immediate sale or settlement of the instrument. The aggregate fair value amounts presented do not necessarily represent management’s estimate of the underlying value of the Corporation. For short-term financial instruments, defined as those with remaining maturities of 90 days or less, and excluding those recorded at fair value on the Corporation’s consolidated balance sheets, book value was considered to be a reasonable estimate of fair value. The following instruments are predominantly short-term: Assets Liabilities Cash and cash equivalents Demand and savings deposits Accrued interest receivable Short-term borrowings Accrued interest payable FRB and FHLB stock represent restricted investments and are carried at cost. As of June 30, 2020, fair values for loans and time deposits were estimated by discounting future cash flows using the current rates, as adjusted for liquidity considerations, at which similar loans would be made to borrowers and similar deposits would be issued to customers for the same remaining maturities. Fair values of loans also include estimated credit losses that would be assumed in a market transaction, which represents estimated exit prices. Brokered deposits consists of demand and saving deposits, which are classified as Level 1, and time deposits, which are classified as Level 2. The fair value of these deposits are determined in a manner consistent with the respective type of deposits discussed above.

Net Income Per Share

Net Income Per Share	6 Months Ended
	Jun. 30, 2020
Earnings Per Share [Abstract]
Net Income Per Share	Net Income Per Share Basic net income per share is calculated as net income divided by the weighted average number of shares outstanding. Diluted net income per share is calculated as net income divided by the weighted average number of shares outstanding plus the incremental number of shares added as a result of converting common stock equivalents, calculated using the treasury stock method. The Corporation’s common stock equivalents consist of outstanding stock options, RSUs and PSUs. PSUs are required to be included in weighted average shares outstanding if performance measures, as defined in each PSU award agreement, are met as of the end of the period. A reconciliation of weighted average shares outstanding used to calculate basic net income per share and diluted net income per share follows (in thousands, except per share data): Three months ended June 30 Six months ended June 30 2020 2019 2020 2019 Weighted average shares outstanding (basic) 161,715 168,343 162,582 169,109 Impact of common stock equivalents 552 825 744 933 Weighted average shares outstanding (diluted) 162,267 169,168 163,326 170,042 Per share: Basic $ 0.24 $ 0.36 $ 0.40 $ 0.69 Diluted 0.24 0.35 0.40 0.68

Stock-Based Compensation

Stock-Based Compensation	6 Months Ended
	Jun. 30, 2020
Share-based Payment Arrangement [Abstract]
Stock-Based Compensation	Stock-Based CompensationThe Corporation grants equity awards to employees in the form of stock options, restricted stock, RSUs or PSUs under its Amended and Restated Equity and Cash Incentive Compensation Plan ("Employee Equity Plan"). Recent grants of equity awards under the Employee Equity Plan have generally been limited to RSUs and PSUs. In addition, employees may purchase stock under the Corporation’s Employee Stock Purchase Plan. The fair value of equity awards granted to employees is recognized as compensation expense over the period during which employees are required to provide service in exchange for such awards. Compensation expense for PSUs is also recognized over the period during which employees are required to provide service in exchange for such awards, however, compensation expense may vary based on the expectations for actual performance relative to defined performance measures. The Corporation also grants equity awards to non-employee members of its board of directors and subsidiary bank boards of directors under the 2011 Directors’ Equity Participation Plan, which was amended and approved by shareholders as the Amended and Restated Directors’ Equity Participation Plan in 2019 ("Directors’ Plan"). Under the Directors’ Plan, the Corporation can grant equity awards to non-employee holding company and subsidiary bank directors in the form of stock options, restricted stock, RSUs or common stock. Recent grants of equity awards under the Directors’ Plan have been limited to RSUs. Equity awards under the Employee Equity Plan are generally granted annually and become fully vested over or after a three-year vesting period. The vesting period for non-performance-based awards represents the period during which employees are required to provide service in exchange for such awards. Equity awards under the Directors' Plan are generally granted annually and become fully vested after a one-year vesting period. Certain events, as defined in the Employee Equity Plan and the Directors' Plan, result in the acceleration of the vesting of equity awards. Fair values for RSUs and a majority of PSUs are based on the trading price of the Corporation’s stock on the date of grant and earn dividend equivalents during the vesting period, which are forfeitable if the awards do not vest. The fair value of certain PSUs are estimated through the use of the Monte Carlo valuation methodology as of the date of grant. As of June 30, 2020, the Employee Equity Plan had 9.3 million shares reserved for future grants through 2023, and the Directors’ Plan had approximately 181,000 shares reserved for future grants through 2029. The following table presents compensation expense and the related tax benefits for equity awards recognized in the consolidated statements of income: Three months ended June 30 Six months ended June 30 2020 2019 2020 2019 (in thousands) Compensation expense $ 1,911 $ 1,788 $ 3,530 $ 3,348 Tax benefit (403) (412) (747) (743) Stock-based compensation expense, net of tax benefit $ 1,508 $ 1,376 $ 2,783 $ 2,605

Employee Benefit Plans

Employee Benefit Plans	6 Months Ended
	Jun. 30, 2020
Retirement Benefits [Abstract]
Employee Benefit Plans	Employee Benefit Plans The net periodic pension cost for the Corporation’s Defined Benefit Pension Plan ("Pension Plan") consisted of the following components: Three months ended June 30 Six months ended June 30 2020 2019 2020 2019 (in thousands) Interest cost $ 681 $ 815 $ 1,362 $ 1,630 Expected return on plan assets (982) (689) (1,964) (1,378) Net amortization and deferral 465 495 930 990 Net periodic pension cost $ 164 $ 621 $ 328 $ 1,242 The components of the net benefit for the Corporation’s Postretirement Benefits Plan ("Postretirement Plan") consisted of the following components: Three months ended June 30 Six months ended June 30 2020 2019 2020 2019 (in thousands) Interest cost $ 11 $ 15 $ 22 $ 30 Net accretion and deferral (137) (139) (274) (278) Net periodic benefit $ (126) $ (124) $ (252) $ (248)

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Commitments The Corporation is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. Those financial instruments include commitments to extend credit and letters of credit, which involve, to varying degrees, elements of credit risk and interest rate risk in excess of the amounts recognized on the Corporation’s consolidated balance sheets. Exposure to credit loss in the event of nonperformance by the other party to the financial instrument for commitments to extend credit and letters of credit is represented by the outstanding amount of those instruments. The outstanding amounts of commitments to extend credit and letters of credit were as follows: June 30, December 31, 2019 (in thousands) Commitments to extend credit $ 8,140,293 $ 6,689,519 Standby letters of credit 294,647 303,020 Commercial letters of credit 52,100 50,432 The Corporation records a reserve for unfunded lending commitments, included in ACL - OBS credit exposures, which represents management’s estimate of credit losses associated with unused commitments to extend credit and letters of credit. See "Note 4 - Allowance for Credit Losses and Asset Quality," for additional details. Residential Lending The Corporation originates and sells residential mortgages to secondary market investors. The Corporation provides customary representations and warranties to secondary market investors that specify, among other things, that the loans have been underwritten to the standards of the secondary market investor. The Corporation may be required to repurchase specific loans, or reimburse the investor for a credit loss incurred on a sold loan if it is determined that the representations and warranties have not been met. Under some agreements with secondary market investors, the Corporation may have additional credit exposure beyond customary representations and warranties, based on the specific terms of those agreements. The Corporation maintains a reserve for estimated losses related to loans sold to investors. As of June 30, 2020 and December 31, 2019, the total reserve for losses on residential mortgage loans sold was $1.1 million and $3.2 million, respectively, including reserves for both representation and warranty and credit loss exposures. With the adoption of CECL on January 1, 2020 the reserve for estimated losses on certain residential mortgage loans sold to investors was reclassified to ACL - OBS credit exposures. This reclassification resulted in a $2.1 million increase to ACL - OBS credit exposures and a corresponding decrease to the reserve for estimated losses related to loans sold to investors in the first quarter of 2020. Legal Proceedings The Corporation is involved in various pending and threatened claims and other legal proceedings in the ordinary course of its business activities. The Corporation evaluates the possible impact of these matters, taking into consideration the most recent information available. A loss reserve is established for those matters for which the Corporation believes a loss is both probable and reasonably estimable. Once established, the reserve is adjusted as appropriate to reflect any subsequent developments. Actual losses with respect to any such matter may be more or less than the amount estimated by the Corporation. For matters where a loss is not probable, or the amount of the loss cannot be reasonably estimated by the Corporation, no loss reserve is established. In addition, from time to time, the Corporation is involved in investigations or other forms of regulatory or governmental inquiry covering a range of possible issues and, in some cases, these may be part of similar reviews of the specified activities of other companies. These inquiries or investigations could lead to administrative, civil or criminal proceedings involving the Corporation, and could result in fines, penalties, restitution, other types of sanctions, or the need for the Corporation to undertake remedial actions, or to alter its business, financial or accounting practices. The Corporation’s practice is to cooperate fully with regulatory and governmental inquiries and investigations. As of the date of this report, the Corporation believes that any liabilities, individually or in the aggregate, which may result from the final outcomes of pending legal proceedings, or regulatory or governmental inquiries or investigations, will not have a material adverse effect on the financial condition of the Corporation. However, legal proceedings, inquiries and investigations are often unpredictable, and it is possible that the ultimate resolution of any such matters, if unfavorable, may be material to the Corporation’s results of operations in any future period, depending, in part, upon the size of the loss or liability imposed and the operating results for the period, and could have a material adverse effect on the Corporation’s business. In addition, regardless of the ultimate outcome of any such legal proceeding, inquiry or investigation, any such matter could cause the Corporation to incur additional expenses, which could be significant, and possibly material, to the Corporation’s results of operations in any future period. SEC Investigation The Corporation is responding to an investigation by the staff of the Division of Enforcement of the SEC regarding certain accounting determinations that could have impacted the Corporation’s reported earnings per share. The Corporation believes that its financial statements filed with the SEC in Forms 10-K and 10-Q present fairly, in all material respects, its financial condition, results of operations and cash flows as of or for the periods ending on their respective dates. The Corporation is cooperating fully with the SEC and at this time cannot predict when or how the investigation will be resolved. Kress v. Fulton Bank, N.A. On October 15, 2019, a former Fulton Bank teller supervisor, D. Kress filed a putative class action lawsuit on behalf of herself and other similarly situated non-exempt, hourly employees in the U.S. District Court for the District of New Jersey, D. Kress v. Fulton Bank, N.A. , Case No. 1:19-cv-18985. Fulton Bank accepted service of process on January 20, 2020. The lawsuit alleges that Fulton Bank did not record or otherwise account for the amount of time which non-exempt employees who are paid based on their time worked, spent conducting branch opening security procedures. The allegation is that, as a result, Fulton Bank did not properly compensate those employees for their regular and overtime wages. The lawsuit alleges that by doing so, Fulton violated: (i) the federal Fair Labor Standards Act and seeks back overtime wages for a period of three years, liquidated damages and attorney fees and costs; (ii) the New Jersey State Wage and Hour Law and seeks back overtime wages for a period of six years, treble damages and attorney fees and costs; and (iii) the New Jersey Wage Payment Law and seeks back wages for a period of six years, treble damages and attorney fees and costs. The lawsuit also asserts New Jersey common law claims seeking compensatory damages and interest.

Long-Term Debt Long-Term Debt

Long-Term Debt Long-Term Debt	6 Months Ended
	Jun. 30, 2020
Debt Disclosure [Abstract]
Long-Term Debt	Long-Term DebtIn March 2020, the Corporation issued $200.0 million and $175.0 million of subordinated notes due in 2030 and 2035, respectively. The subordinated notes maturing in 2030 were issued with a fixed-to-floating rate of 3.25% and an effective rate of 3.35%, due to issuance costs, and the subordinated notes maturing in 2035 were issued with a fixed-to-floating rate of 3.75% and an effective rate of 3.85%, due to issuance costs.

Basis of Presentation Basis of

Basis of Presentation Basis of Presentation (Policies)	6 Months Ended
	Jun. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of PresentationThe accompanying unaudited Consolidated Financial Statements of the Corporation have been prepared in conformity with GAAP for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and notes required by GAAP for complete financial statements. The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the amounts of assets and liabilities as of the date of the financial statements as well as revenues and expenses during the period. Actual results could differ from those estimates. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. These Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and the notes thereto included in the Corporation's Annual Report on Form 10-K for the year ended December 31, 2019. Operating results for the three 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 Corporation evaluates subsequent events through the date of filing of this Form 10-Q with the SEC.
Recently Issued Accounting Standards	CECL Adoption and Updated Significant Accounting Policy On January 1, 2020, the Corporation adopted ASU 2016-13, Financial Instruments - Credit Losses (ASC Topic 326): Measurement of Credit Losses on Financial Instruments, which replaces the incurred loss methodology, and is referred to as CECL. The measurement of expected credit losses under CECL is applicable to financial assets measured at amortized cost, including loans and HTM debt securities. It also applies to OBS credit exposures (loan commitments, standby letters of credit, financial guarantees, and other similar instruments) and net investments in leases recognized by a lessor in accordance with ASC Topic 842. The Corporation adopted CECL using the modified retrospective method for all financial assets measured at amortized cost, net of investments in leases and OBS credit exposures. Results for reporting periods beginning after January 1, 2020 are presented under CECL, while prior period results are reported in accordance with the previously applicable incurred loss methodology. The Corporation recorded an increase of $58.3 million to the ACL on January 1, 2020 as a result of the adoption of CECL. Retained earnings decreased $43.8 million and deferred tax assets increased by $12.4 million. Included in the $58.3 million increase to the ACL was $2.1 million for certain OBS credit exposures that was previously recognized in other liabilities before the adoption of CECL. Loans : Loans are stated at their principal amount outstanding, except for mortgage loans held for sale, which are carried at fair value. Interest income on loans is accrued as earned. Unearned income on lease financing receivables is recognized on a basis which approximates the effective yield method. In general, loans are placed on non-accrual status once they become 90 days delinquent as to principal or interest. In certain cases a loan may be placed on non-accrual status prior to being 90 days delinquent if there is an indication that the borrower is having difficulty making payments, or the Corporation believes it is probable that all amounts will not be collected according to the contractual terms of the loan agreement. When interest accruals are discontinued, unpaid interest previously credited to income is reversed. Non-accrual loans may be restored to accrual status when all delinquent principal and interest has been paid currently for six consecutive months or the loan is considered secured and in the process of collection. The Corporation generally applies payments received on non-accruing loans to principal until such time as the principal is paid off, after which time any payments received are recognized as interest income. If the Corporation believes that all amounts outstanding on a non-accrual loan will ultimately be collected, payments received subsequent to its classification as a non-accrual loan are allocated between interest income and principal. A loan that is 90 days delinquent may continue to accrue interest if the loan is both adequately secured and is in the process of collection. Past due status is determined based on contractual due dates for loan payments. An adequately secured loan is one that has collateral with a supported fair value that is sufficient to discharge the debt, and/or has an enforceable guarantee from a financially responsible party. A loan is considered to be in the process of collection if collection is proceeding through legal action or through other activities that are reasonably expected to result in repayment of the debt or restoration to current status in the near future. Loans deemed to be a loss are written off through a charge against the ACL. Closed-end consumer loans are generally charged off when they become 120 days past due (180 days for open-end consumer loans) if they are not adequately secured by real estate. All other loans are evaluated for possible charge-off when it is probable that the balance will not be collected, based on the ability of the borrower to pay and the value of the underlying collateral, if any. Principal recoveries of loans previously charged off are recorded as increases to the ACL. Loan Origination Fees and Costs: Loan origination fees and the related direct origination costs are deferred and amortized over the life of the loan as an adjustment to interest income using the effective yield method. For mortgage loans sold, net loan origination fees and costs are included in the gain or loss on sale of the related loan, as components of mortgage banking. Loan origination fees and the related direct origination costs for loans originated under the PPP loan program are amortized on a straight-line basis over the repayment period of the loan. To the extent that a PPP loan is forgiven, the unamortized fees will be recorded at the time of forgiveness. Troubled Debt Restructurings: Loans are accounted for and reported as TDRs when, for economic or legal reasons, the Corporation grants a concession to a borrower experiencing financial difficulty that it would not otherwise consider. Concessions, whether negotiated or imposed by bankruptcy, granted under a TDR typically involve a temporary deferral of scheduled loan payments, an extension of a loan’s stated maturity date or a reduction in the interest rate. Non-accrual TDRs can be restored to accrual status if principal and interest payments, under the modified terms, are current for six consecutive months after modification. On March 27, 2020 the CARES Act was signed into law. The CARES Act includes an option for financial institutions to suspend the requirements of GAAP for certain loan modifications that would otherwise be categorized as a TDR. Certain conditions must be met with respect to the loan modification including that the modification is related to COVID-19, the modified loan was not more than 30 days past due on December 31, 2019 and the modification was executed between March 1, 2020 and the earlier of (a) 60 days after the date of the COVID-19 national emergency comes to an end or (b) December 31, 2020. The Corporation is applying the option under the CARES act for all loan modifications that qualify. On April 7, 2020, Troubled Debt Restructurings: Interagency Statement on Loan Modifications and Reporting for Financial Institutions Working with Customers Affected by COVID-19 was issued by the federal banking regulatory agencies. Included in the Interagency Statement were provisions permitting banks that grant loan modifications to customers impacted by COVID-19 to exclude those modifications from loans categorized as TDRs. The Corporation is adopting the guidance in this Interagency Statement effective for COVID-19-related modifications occurring subsequent to March 13, 2020. Allowance for Credit Losses: The discussion that follows describes the methodology for determining the ACL under the CECL model that was adopted January 1, 2020. The allowance methodology for prior periods is disclosed in the Corporation’s 2019 Annual Report on Form 10-K. The Corporation has elected to exclude accrued interest receivable from the measurement of its ACL. When a loan is placed on non-accrual status, any outstanding accrued interest is reversed against interest income. Loans: The ACL for loans is an estimate of the expected losses to be realized over the life of the loans in the portfolio. The ACL is determined for two distinct categories of loans: 1) loans evaluated collectively for expected credit losses and 2) loans evaluated individually for expected credit losses. The ACL also includes certain qualitative adjustments to the CECL model. Loans Evaluated Collectively : Loans evaluated collectively for expected credit losses include loans on accrual status, excluding accruing TDRs, and loans initially evaluated individually, but determined not to have enhanced credit risk characteristics. This category includes loans on non-accrual status and TDRs where the total commitment amount is less than $1 million. In order to determine the ACL: • Loans are aggregated into pools based on similar risk characteristics. • The PD and LGD CECL model components are determined based on loss estimates driven by historical experience at the input level. • The PD model component uses "through the economic cycle transition" matrices based on the Corporation's historical loan and transaction data across each pool of loans. • The LGD model component calculates a lifetime LGD estimate across each pool of loans utilizing a non parametric loss curve modeling approach. • Reasonable and supportable forecasts are incorporated into the PD model component. • Reasonable and supportable forecast periods are based on different economic forecasts and scenarios sourced from an external party. A future loss forecast over the reasonable and supportable forecast period is based on the projected performance of specific economic variables that statistically correlate with the PD and LGD pools. After the reasonable and supportable forecast period, loss estimates naturally revert to input-level reversion. • Cash flow assumptions are established for each loan using maturity date, amortization schedule and interest rate. • A constant prepayment rate is calculated for each loan pool in the CECL model. Loans Evaluated Individually : Loans evaluated individually for expected credit losses include loans on non-accrual status and TDRs where the commitment amount equals or exceeds $1.0 million. The required ACL for such loans is determined using either the present value of expected future cash flows, observable market price or the fair value of collateral. Loans evaluated individually may have specific allocations assigned if the measured value of the loan using one of the noted techniques is less than its current carrying value. For loans measured using the fair value of collateral, if the analysis determines that sufficient collateral value would be available for repayment of the debt, then no allocations would be assigned to those loans. Collateral could be in the form of real estate or business assets, such as accounts receivable or inventory, in the case of commercial and industrial loans. Commercial and industrial loans may also be secured by real estate. For loans secured by real estate, estimated fair values are determined primarily through appraisals performed by third-party appraisers, discounted to arrive at expected net sale proceeds. For collateral dependent loans, estimated real estate fair values are also net of estimated selling costs. When a real estate secured loan is impaired, a decision is made regarding whether an updated appraisal of the real estate is necessary. This decision is based on various considerations, including: the age of the most recent appraisal; the loan-to-value ratio based on the original appraisal; the condition of the property; the Corporation’s experience and knowledge of the real estate market; the purpose of the loan; market factors; payment status; the strength of any guarantors; and the existence and age of other indications of value such as broker price opinions, among others. The Corporation generally obtains updated appraisals performed by third-party appraisers for impaired loans secured predominantly by real estate every 12 months. When updated appraisals are not obtained for loans secured by real estate, fair values are estimated based on the original appraisal values, as long as the original appraisal indicated an acceptable loan-to-value position and there has not been a significant deterioration in the collateral value since the original appraisal was performed. For loans with principal balances greater than or equal to $1.0 million secured by non-real estate collateral, such as accounts receivable or inventory, estimated fair values are determined based on borrower financial statements, inventory listings, accounts receivable agings or borrowing base certificates. Indications of value from these sources are generally discounted based on the age of the financial information or the quality of the assets. Liquidation or collection discounts are applied to these assets based upon existing loan evaluation policies. Management regularly reviews loans in the portfolio to assess credit quality indicators and to determine appropriate loan classification. For commercial loans, commercial mortgages and construction loans to commercial borrowers, an internal risk rating process is used. The Corporation believes that internal risk ratings are the most relevant credit quality indicator for these types of loans. The migration of loans through the various internal risk rating categories is a significant component of the ACL methodology for these loans, which bases the PD on this migration. Assigning risk ratings involves judgment. Risk ratings may be changed based on ongoing monitoring procedures, or if specific loan review assessments identify a deterioration or an improvement in the loan. The following is a summary of the Corporation's internal risk rating categories: • Pass : These loans do not currently pose undue credit risk and can range from the highest to average quality, depending on the degree of potential risk. • Special Mention : These loans have a heightened credit risk, but not to the point of justifying a classification of Substandard. Loans in this category are currently acceptable, but are nevertheless potentially weak. • Substandard or Lower : These loans are inadequately protected by current sound worth and paying capacity of the borrower. There exists a well-defined weakness or weaknesses that jeopardize the normal repayment of the debt. The allocation of the ACL is reviewed to evaluate its appropriateness in relation to the overall risk profile of the loan portfolio. The Corporation considers risk factors such as: local and national economic conditions; trends in delinquencies and non-accrual loans; the diversity of borrower industry types; and the composition of the portfolio by loan type. Qualitative and Other Adjustments to ACL: In addition to the quantitative credit loss estimates for loans evaluated collectively, qualitative factors that may not be fully captured in the quantitative results are also evaluated. These include changes in lending policy, the nature and volume of the portfolio, overall business conditions in the economy, credit concentrations, competition, model imprecision, and legal and regulatory requirements. Qualitative adjustments are judgmental and are based on management’s knowledge of the portfolio and the markets in which the Corporation operates. Qualitative adjustments are evaluated and approved on a quarterly basis. Additionally, the ACL includes other allowance categories that are not directly incorporated in the quantitative results. These categories include but are not limited to loans-in-process, trade acceptances and overdrafts. OBS Credit Exposures: The ACL for OBS credit exposures is recorded in other liabilities on the consolidated balance sheets. This portion of the ACL represents management’s estimate of expected losses in its unfunded loan commitments and other OBS credit exposures, such as letters of credit and credit recourse on sold residential mortgage loans. The ACL specific to unfunded commitments is determined by estimating future draws and applying the expected loss rates on those draws. Future draws are based on historical averages of utilization rates (i.e., the likelihood of draws taken). The ACL for OBS credit exposures is increased or decreased by charges or reductions to expense, through the provision for credit losses. HTM Debt Securities: Expected credit losses on HTM debt securities would be recorded in the ACL on HTM debt securities. As of June 30, 2020, no HTM debt securities required an ACL as these investments consist solely of government guaranteed residential mortgage-backed securities. AFS Debt Securities : The ACL approach for AFS debt securities differs from the CECL approach used for HTM debt securities as AFS debt securities are carried at fair value rather than amortized cost. Prior to the adoption of CECL, credit losses on AFS debt securities were determined using an OTTI approach. Under CECL, the concept of OTTI has been eliminated, but the general approach to determining credit losses is largely consistent with the OTTI method. Under CECL, credit losses on AFS debt securities are recognized through an ACL rather than through a direct write-down of the security. As of June 30, 2020, no AFS debt securities required an ACL. Other Recently Adopted Accounting Standards On January 1, 2020, the Corporation adopted ASC Update 2018-13 - Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement. This update changes the fair value measurement disclosure requirements of ASC Topic 820 "Fair Value Measurement." Among other things, the update modifies the disclosure objective paragraphs of ASC 820 to eliminate: (1) "at a minimum" from the phrase "an entity shall disclose at a minimum;" and (2) other similar disclosure requirements to promote the appropriate exercise of discretion by entities. The Corporation adopted this standards update effective with its March 31, 2020 quarterly report on Form 10-Q and it did not have a material impact on its consolidated financial statements. On January 1, 2020, the Corporation adopted ASC Update 2018-15 - Intangibles - Goodwill and Other - Internal-Use Software (Topic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract. This update requires a customer in a cloud computing arrangement that is a service contract to follow the internal-use software guidance in ASC Subtopic 350-40 to determine which implementation costs to capitalize as assets. The Corporation adopted this standards update effective with its March 31, 2020 quarterly report on Form 10-Q and it did not have a material impact on its consolidated financial statements In March 2020, the Corporation adopted ASC Update 2020-04 - Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting. This standards update provided optional guidance for a limited time to ease the potential burden in accounting for reference rate reform, specific to those using LIBOR or another reference rate expected to be discontinued due to this reform. The Corporation adopted this standards update effective with its March 31, 2020 quarterly report on Form 10-Q and it did not have a material impact on its consolidated financial statements. Recently Issued Accounting Standards Standard Description Date of Anticipated Adoption Effect on Financial Statements ASC Update 2018-14 Compensation - Retirement Benefits - Defined Benefit Plans - General (Subtopic 715-20): Disclosure Framework - Changes to the Disclosure Requirements for Defined Benefit Plans This update amends ASC Topic 715-20 to add, remove, and clarify disclosure requirements related to defined benefit pension and other postretirement plans. Fiscal Year 2020 The Corporation intends to adopt this standards update effective with its December 31, 2020 annual report on Form 10-K. This standard will impact the Corporation's disclosure relating to employee benefit plans, but the Corporation does not expect the adoption of this update to have a material impact on its consolidated financial statements. ASC Update 2019-12 Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes This update simplifies the accounting for income taxes by removing certain exceptions to the general principles in Topic 740. The amendments also improve consistent application of and simplify GAAP for other areas of Topic 740 by clarifying and amending existing guidance. First Quarter 2021 The Corporation intends to adopt this standards update effective with its March 31, 2021 quarterly report on Form 10-Q. This update is not expected to have a material impact on the consolidated financial statements. Reclassifications

Investment Securities (Tables)

Investment Securities (Tables)	6 Months Ended
	Jun. 30, 2020
Investments, Debt and Equity Securities [Abstract]
Schedule of Amortized Cost and Fair Values of Investment Securities	The following table presents the amortized cost and estimated fair values of investment securities as of June 30, 2020: Amortized Gross Gross Estimated (in thousands) Available for Sale State and municipal securities $ 852,617 $ 41,292 $ (227) $ 893,682 Corporate debt securities 312,507 15,168 (2,322) 325,353 Collateralized mortgage obligations 559,281 19,113 — 578,394 Residential mortgage-backed securities 156,152 4,716 — 160,868 Commercial mortgage-backed securities 560,294 24,849 — 585,143 Auction rate securities 107,410 — (6,551) 100,859 Total $ 2,548,261 $ 105,138 $ (9,100) $ 2,644,299 Held to Maturity Residential mortgage-backed securities $ 330,514 $ 23,595 $ — $ 354,109 The following table presents the amortized cost and estimated fair values of investment securities as of December 31, 2019: Amortized Gross Gross Estimated (in thousands) Available for Sale State and municipal securities $ 638,125 $ 15,826 $ (1,024) $ 652,927 Corporate debt securities 370,401 8,490 (1,534) 377,357 Collateralized mortgage obligations 682,307 11,726 (315) 693,718 Residential mortgage-backed securities 177,183 1,078 (949) 177,312 Commercial mortgage-backed securities 489,603 6,471 (1,777) 494,297 Auction rate securities 107,410 — (5,484) 101,926 Total $ 2,465,029 $ 43,591 $ (11,083) $ 2,497,537 Held to Maturity Residential mortgage-backed securities $ 369,841 $ 13,864 $ — $ 383,705
Schedule of Amortized Cost and Fair Values of Debt Securities by Contractual Maturities	The amortized cost and estimated fair values of debt securities as of June 30, 2020, by contractual maturity, are shown in the following table. Actual maturities may differ from contractual maturities as certain investment securities are subject to call or prepayment with or without call or prepayment penalties. Available for Sale Held to Maturity Amortized Estimated Amortized Estimated (in thousands) Due in one year or less $ 12,731 $ 12,731 $ — $ — Due from one year to five years 31,144 32,687 — — Due from five years to ten years 301,186 313,583 — — Due after ten years 927,473 960,893 — — 1,272,534 1,319,894 — — Residential mortgage-backed securities (1) 156,152 160,868 330,514 354,109 Commercial mortgage-backed securities (1) 560,294 585,143 — — Collateralized mortgage obligations (1) 559,281 578,394 — — Total $ 2,548,261 $ 2,644,299 $ 330,514 $ 354,109 (1) Mortgage-backed securities and collateralized mortgage obligations do not have stated maturities and are dependent upon the interest rate environment and prepayments on the underlying loans.
Summary of Gains and Losses from Equity and Debt Securities, and Losses Recognized from Other-than-Temporary Impairment	The following table presents information related to the gross realized gains and losses on the sales of investment securities for the periods presented: Gross Realized Gains Gross Realized Losses Net Gains (in thousands) Three months ended June 30, 2020 $ 6,334 $ (3,329) $ 3,005 June 30, 2019 3,012 (2,836) 176 Six months ended June 30, 2020 $ 6,451 $ (3,400) $ 3,051 June 30, 2019 3,269 (3,028) 241
Gross Unrealized Losses and Fair Values of Investments by Category and Length of Time in Continuous Unrealized Loss Position	The following tables present the gross unrealized losses and estimated fair values of investment securities, aggregated by category and length of time that individual securities have been in a continuous unrealized loss position as of June 30, 2020: Less than 12 months 12 months or longer Total Number of Securities Estimated Unrealized Number of Securities Estimated Unrealized Estimated Unrealized Available for Sale (in thousands) State and municipal securities 9 $ 30,378 $ (227) — $ — $ — $ 30,378 $ (227) Corporate debt securities 15 85,486 (2,322) — — — 85,486 (2,322) Auction rate securities — — — 177 100,859 (6,551) 100,859 (6,551) Total available for sale (1) 24 $ 115,864 $ (2,549) 177 $ 100,859 $ (6,551) $ 216,723 $ (9,100) (1) No HTM securities were in an unrealized loss position as of June 30, 2020. The following tables present the gross unrealized losses and estimated fair values of investment securities, aggregated by category and length of time that individual securities have been in a continuous unrealized loss position as of December 31, 2019: Less than 12 months 12 months or longer Total Number of Securities Estimated Unrealized Number of Securities Estimated Unrealized Estimated Unrealized Available for Sale (in thousands) State and municipal securities 44 $ 136,344 $ (1,024) — $ — $ — $ 136,344 $ (1,024) Corporate debt securities 5 30,719 (346) 8 18,759 (1,188) 49,478 (1,534) Collateralized mortgage obligations 5 33,865 (190) 1 5,330 (125) 39,195 (315) Residential mortgage-backed securities 5 12,247 (40) 26 127,373 (909) 139,620 (949) Commercial mortgage-backed securities 7 121,340 (1,777) — — — 121,340 (1,777) Auction rate securities — — — 177 101,926 (5,484) 101,926 (5,484) Total available for sale (1) 66 $ 334,515 $ (3,377) 212 $ 253,388 $ (7,706) $ 587,903 $ (11,083)

Loans and Allowance for Credi_2

Loans and Allowance for Credit Losses (Tables)	6 Months Ended
	Jun. 30, 2020
Receivables [Abstract]
Summary of Gross Loans by Type	June 30, December 31, 2019 (in thousands) Real estate - commercial mortgage $ 6,934,936 $ 6,700,776 Commercial and industrial 5,971,201 4,446,701 Real-estate - residential mortgage 2,862,226 2,641,465 Real-estate - home equity 1,251,455 1,314,944 Real-estate - construction 972,909 971,079 Consumer 465,610 463,164 Equipment lease financing and other 266,521 322,625 Overdrafts 3,622 3,582 Gross loans 18,728,480 16,864,336 Unearned income (23,758) (26,810) Net Loans $ 18,704,722 $ 16,837,526
Activity in the Allowance for Credit Losses	The following table presents the activity in the ACL in 2020: Three months ended June 30, 2020 Six months ended June 30, 2020 (in thousands) Balance at beginning of period $ 257,471 $ 166,209 Impact of adopting CECL (1) — 58,348 Loans charged off (8,047) (22,050) Recoveries of loans previously charged off 3,926 6,813 Net loans charged off (4,121) (15,237) Provision for credit losses (2) 19,570 63,600 Balance at end of period $ 272,920 $ 272,920 (1) Includes $12.6 million of reserves for OBS credit exposures as of January 1, 2020. (2) Includes $(2.6) million and $1.2 million related to OBS credit exposures for the three and six months ended June 30, 2020, respectively. The following table presents the activity in the ACL - loans by portfolio segment, for the three and six months ended June 30, 2020: Real Estate - Commercial and Real Estate - Real Estate - Real Estate - Consumer Equipment lease financing, other Total (in thousands) Three months ended June 30, 2020 Balance at March 31, 2020 $ 90,319 $ 63,606 $ 15,253 $ 42,427 $ 8,398 $ 9,865 $ 8,640 $ 238,508 Loans charged off (2,324) (3,480) (458) (235) (17) (845) (688) (8,047) Recoveries of loans previously charged off 95 2,978 44 112 — 605 92 3,926 Net loans recovered (charged off) (2,229) (502) (414) (123) (17) (240) (596) (4,121) Provision for loan losses (1) 14,605 (1,657) 1,552 4,139 3,933 674 (1,096) 22,150 Balance at June 30, 2020 $ 102,695 $ 61,447 $ 16,391 $ 46,443 $ 12,314 $ 10,299 $ 6,948 $ 256,537 Six months ended June 30, 2020 Balance at December 31, 2019 $ 45,610 $ 68,602 $ 17,744 $ 19,771 $ 4,443 $ 3,762 $ 3,690 $ 163,622 Impact of CECL 29,361 (18,576) (65) 21,235 4,015 5,969 3,784 45,723 Loans charged off (3,179) (14,379) (745) (422) (17) (2,087) (1,221) (22,050) Recoveries of loans previously charged off 339 4,712 261 197 70 1,034 200 6,813 Net loans recovered (charged off) (2,840) (9,667) (484) (225) 53 (1,053) (1,021) (15,237) Provision for loan losses (1) 30,564 21,088 (804) 5,662 3,803 1,621 495 62,429 Balance at June 30, 2020 $ 102,695 $ 61,447 $ 16,391 $ 46,443 $ 12,314 $ 10,299 $ 6,948 $ 256,537 (1) Provision included in the table only includes the portion related to Net Loans. The following table presents the ACL - loans and amortized cost basis of Net Loans under CECL methodology as of June 30, 2020: ACL - Loans Net Loans Collectively Evaluated for Impairment Individually Evaluated for Impairment Total ACL - Loans Collectively Evaluated for Impairment Individually Evaluated for Impairment Total Net Loans (in thousands) June 30, 2020 Real Estate - Commercial Mortgage $ 94,654 $ 8,041 $ 102,695 $ 6,873,754 $ 61,182 $ 6,934,936 Commercial and Industrial 54,413 7,034 61,447 5,927,424 43,777 5,971,201 Real Estate - Home Equity 8,510 7,881 16,391 1,228,411 23,044 1,251,455 Real Estate - Residential Mortgage 39,984 6,459 46,443 2,817,173 45,053 2,862,226 Real Estate - Construction 12,060 254 12,314 969,427 3,482 972,909 Consumer 10,182 117 10,299 465,418 192 465,610 Equipment Lease Financing and Other 6,948 — 6,948 229,562 16,823 246,385 Total $ 226,751 $ 29,786 $ 256,537 $ 18,511,169 $ 193,553 $ 18,704,722 The following table presents the activity in the ACL for the periods indicated in 2019: Three months ended June 30, 2019 Six months ended June 30, 2019 (in thousands) Balance at beginning of period $ 170,372 $ 169,410 Loans charged off (3,711) (10,080) Recoveries of loans previously charged off 5,255 7,486 Net loans charged off 1,544 (2,594) Provision for credit losses(1) 5,025 10,125 Balance at end of period $ 176,941 $ 176,941 (1) Includes ($1.6 million) and ($2.2 million) related to reserve for unfunded lending commitments for the three and six months ended June 30, 2019, respectively. The following table presents the activity in the allowance for loan losses, by portfolio segment, for the three and six months ended June 30, 2019: Real Estate - Commercial & Real Estate - Real Estate - Real Estate - Consumer Equipment lease financing, other Total (in thousands) Three months ended June 30, 2019 Balance at March 31, 2019 $ 51,946 $ 60,501 $ 19,215 $ 19,146 $ 4,941 $ 3,319 $ 3,041 $ 162,109 Loans charged off (230) (1,895) (206) (134) (3) (795) (448) (3,711) Recoveries of loans previously charged off 169 2,680 223 211 1,245 579 148 5,255 Net loans recovered (charged off) (61) 785 17 77 1,242 (216) (300) 1,544 Provision for loan losses 2,974 5,055 (251) (331) (1,255) 260 128 6,580 Balance at June 30, 2019 $ 54,859 $ 66,341 $ 18,981 $ 18,892 $ 4,928 $ 3,363 $ 2,869 $ 170,233 Six months ended June 30, 2019 Balance at December 31, 2018 $ 52,889 $ 58,868 $ 18,911 $ 18,921 $ 5,061 $ 3,217 $ 2,670 $ 160,537 Loans charged off (1,375) (4,682) (425) (789) (98) (1,478) (1,233) (10,080) Recoveries of loans previously charged off 305 3,923 420 343 1,329 789 377 7,486 Net loans recovered (charged off) (1,070) (759) (5) (446) 1,231 (689) (856) (2,594) Provision for loan losses 3,040 8,232 75 417 (1,364) 835 1,055 12,290 Balance at June 30, 2019 $ 54,859 $ 66,341 $ 18,981 $ 18,892 $ 4,928 $ 3,363 $ 2,869 $ 170,233 (1) The provision in the table only includes the portion related to Net Loans. The following table presents Net Loans and their related allowance for loan losses, by portfolio segment as of June 30, 2019: Real Estate - Commercial and Real Estate - Real Estate - Real Estate - Consumer Equipment lease financing, other and Total (in thousands) Allowance for loan losses: Collectively evaluated for impairment $ 45,367 $ 53,985 $ 8,463 $ 9,913 $ 4,399 $ 3,356 $ 2,869 $ 128,352 Individually evaluated for impairment 9,492 12,356 10,518 8,979 529 7 — 41,881 Total $ 54,859 $ 66,341 $ 18,981 $ 18,892 $ 4,928 $ 3,363 $ 2,869 $ 170,233 Net Loans: Collectively evaluated for impairment $ 6,438,080 $ 4,313,666 $ 1,363,392 $ 2,414,627 $ 918,380 $ 452,865 $ 273,118 $ 16,174,128 Individually evaluated for impairment 59,893 51,582 23,582 37,339 4,167 9 17,758 194,330 Total $ 6,497,973 $ 4,365,248 $ 1,386,974 $ 2,451,966 $ 922,547 $ 452,874 $ 290,876 $ 16,368,458
Schedule of Allowance for Credit Losses	The following table presents the components of the ACL under CECL: June 30, 2020 (in thousands) ACL - loans $ 256,537 ACL - OBS credit exposure 16,383 Total ACL $ 272,920 The following table presents the components of the ACL: December 31, 2019 (in thousands) Allowance for loan losses $ 163,622 Reserve for unfunded lending commitments 2,587 ACL $ 166,209
Total Impaired Loans by Class Segment	The following table presents total non-accrual loans, by class segment, as of the following periods: June 30, 2020 December 31, 2019 Non-accrual Loans Non-accrual Loans With a Related Allowance Without a Related Allowance Total Total (in thousands) Real estate - commercial mortgage $ 24,638 $ 16,137 $ 40,775 $ 33,166 Commercial and industrial 18,222 21,157 39,379 48,106 Real estate - residential mortgage 15,634 1,256 16,890 16,676 Real estate - home equity 7,688 — 7,688 7,004 Real estate - construction 2,412 1,070 3,482 3,618 Equipment lease financing and other — 16,823 16,823 16,528 $ 68,594 $ 56,443 $ 125,037 $ 125,098
Financing Receivable Credit Quality Indicators	The following table summarizes designated internal risk categories by portfolio segment and loan class, by origination year, as of June 30, 2020: Term Loans Amortized Cost Basis by Origination Year Revolving Loans Revolving Loans converted to Term Loans (dollars in thousands) Amortized Amortized 2020 2019 2018 2017 2016 Prior Cost Basis Cost Basis Total Real estate - construction Pass $ 57,915 $ 229,899 $ 204,748 $ 140,877 $ 50,094 $ 126,187 $ 48,947 $ — $ 858,667 Special Mention — 534 — — 783 2,635 336 — 4,288 Substandard or Lower — 156 — — 778 5,601 760 — 7,295 Total real estate - construction 57,915 230,589 204,748 140,877 51,655 134,423 50,043 — 870,250 Real estate - construction Current period gross charge-offs — — — — — (17) — — (17) Current period recoveries — — — — — 70 — — 70 Current period net charge-offs — — — — — 53 — — 53 Commercial and industrial Pass 2,286,984 559,728 362,758 257,780 230,120 625,302 1,285,256 3,412 5,611,340 Special Mention 51,958 9,918 10,905 8,782 14,898 37,112 59,836 868 194,277 Substandard or Lower 30,171 1,193 13,353 14,186 12,712 25,173 68,283 512 165,583 Total commercial and industrial 2,369,113 570,839 387,016 280,748 257,730 687,587 1,413,375 4,792 5,971,200 Commercial and industrial loans Current period gross charge-offs — (107) (9) (55) (334) (210) (13,664) — (14,379) Current period recoveries 39 242 63 43 1,673 2,652 — 4,712 Current period net charge-offs — (68) 233 8 (291) 1,463 (11,012) — (9,667) Real estate - commercial mortgage Pass 459,245 935,899 791,164 894,358 918,394 2,554,653 81,448 5,812 6,640,973 Special Mention 755 4,819 18,187 30,164 16,142 101,456 3,207 — 174,730 Substandard or Lower 15 469 8,393 28,954 9,470 70,781 1,150 — 119,232 Total real estate - commercial 460,015 941,187 817,744 953,476 944,006 2,726,890 85,805 5,812 6,934,935 Real estate - commercial mortgage Current period gross charge-offs — (10) (16) (1,993) (11) (1,132) (17) — (3,179) Current period recoveries — — — — 1 338 — — 339 Current period net charge-offs — (10) (16) (1,993) (10) (794) (17) — (2,840) Total Pass $ 2,804,144 $ 1,725,526 $ 1,358,670 $ 1,293,015 $ 1,198,608 $ 3,306,142 $ 1,415,651 $ 9,224 $ 13,110,980 Special Mention 52,713 15,271 29,092 38,946 31,823 141,203 63,379 868 373,295 Substandard or Lower 30,186 1,818 21,746 43,140 22,960 101,555 70,193 512 292,110 Total $ 2,887,043 $ 1,742,615 $ 1,409,508 $ 1,375,101 $ 1,253,391 $ 3,548,900 $ 1,549,223 $ 10,604 $ 13,776,385 The information presented in the table above is not required for periods prior to the adoption of CECL. The following table presents the most comparable required information for the prior period, internal credit risk ratings for the indicated loan class segments as of December 31, 2019: Pass Special Mention Substandard or Lower Total (dollars in thousands) Real estate - commercial mortgage $ 6,429,407 $ 137,163 $ 134,206 $ 6,700,776 Commercial and industrial - secured 3,830,847 171,442 195,884 4,198,173 Commercial and industrial - unsecured 234,987 9,665 3,876 248,528 Total commercial and industrial 4,065,834 181,107 199,760 4,446,701 Construction - commercial residential 100,808 2,897 3,461 107,166 Construction - commercial 765,562 1,322 2,676 769,560 Total construction (excluding construction - other) 866,370 4,219 6,137 876,726 $ 11,361,611 $ 322,489 $ 340,103 $ 12,024,203 % of Total 94.5 % 2.7 % 2.8 % 100.0 % Term Loans Amortized Cost Basis by Origination Year Revolving Loans Revolving Loans converted to Term Loans (dollars in thousands) Amortized Amortized 2020 2019 2018 2017 2016 Prior Cost Basis Cost Basis Total Real estate - home equity Performing $ 13,718 $ 9,591 $ 15,464 $ 13,681 $ 15,006 $ 145,384 $ 1,018,865 $ 7,755 $ 1,239,464 Nonperforming — — 153 256 228 2,674 8,265 415 11,991 Total real estate - home equity 13,718 9,591 15,617 13,937 15,234 148,058 1,027,130 8,170 1,251,455 Real estate - home equity Current period gross charge-offs — — — (117) (23) (231) (374) — (745) Current period recoveries — — — — — 219 42 — 261 Current period net charge-offs — — — (117) (23) (12) (332) — (484) Real estate - residential mortgage Performing 554,061 660,974 311,804 438,785 320,134 553,448 — — 2,839,206 Nonperforming — 635 2,647 2,465 398 16,876 — — 23,021 Total real estate - residential mortgage 554,061 661,609 314,451 441,250 320,532 570,324 — — 2,862,227 Real estate - residential mortgage Current period gross charge-offs — (15) (100) (104) (6) (197) — — (422) Current period recoveries — — 10 1 1 185 — — 197 Current period net charge-offs — (15) (90) (103) (5) (12) — — (225) Consumer Performing 58,202 115,866 115,707 54,108 31,027 43,344 47,021 — 465,275 Nonperforming — — 73 42 31 42 147 — 335 Total consumer credit - other consumer loans 58,202 115,866 115,780 54,150 31,058 43,386 47,168 — 465,610 Consumer Current period gross charge-offs — (532) (335) (326) (303) (591) — — (2,087) Current period recoveries 83 89 143 51 43 625 — — 1,034 Current period net charge-offs 83 (443) (192) (275) (260) 34 — — (1,053) Equipment Lease Financing and Other Performing 63,153 76,157 54,353 39,435 16,132 2,537 — — 251,767 Nonperforming 1,526 — 207 16,048 299 296 — — 18,376 Total leasing and other 64,679 76,157 54,560 55,483 16,431 2,833 — — 270,143 Equipment Lease Financing and other Current period gross charge-offs (228) (460) — (95) — (438) — — (1,221) Current period recoveries 61 39 — 66 2 32 — — 200 Current period net charge-offs (167) (421) — (29) 2 (406) — — (1,021) Construction - other Performing 22,051 63,737 6,491 — 16 — 9,508 673 102,476 Nonperforming — — — 182 — — — — 182 Total leasing and other 22,051 63,737 6,491 182 16 — 9,508 673 102,658 Construction - other Current period gross charge-offs — — — — — — — — — Current period recoveries — — — — — — — — — Current period net charge-offs — — — — — — — — — Total Performing $ 711,185 $ 926,325 $ 503,819 $ 546,009 $ 382,315 $ 744,713 $ 1,075,394 $ 8,428 $ 4,898,188 Nonperforming 1,526 635 3,080 18,993 956 19,888 8,412 415 53,905 Total $ 712,711 $ 926,960 $ 506,899 $ 565,002 $ 383,271 $ 764,601 $ 1,083,806 $ 8,843 $ 4,952,093 The information presented in the table above is not required for periods prior to the adoption of CECL. The following table presents the most comparable required information for the prior period, a summary of performing, delinquent and non-performing loans for the indicated class segments: December 31, 2019 Performing Delinquent (1) Non-performing (2) Total (dollars in thousands) Real estate - home equity $ 1,292,035 $ 12,341 $ 10,568 $ 1,314,944 Real estate - residential mortgage 2,584,763 34,291 22,411 2,641,465 Construction - other 92,649 895 809 94,353 Consumer - direct 63,582 465 190 64,237 Consumer - indirect 393,974 4,685 268 398,927 Total consumer 457,556 5,150 458 463,164 Equipment lease financing and other 278,743 4,012 16,642 299,397 $ 4,705,746 $ 56,689 $ 50,888 $ 4,813,323 % of Total 97.8 % 1.2 % 1.0 % 100 % (1) Includes all accruing loans 30 days to 89 days past due. (2) Includes all accruing loans 90 days or more past due and all non-accrual loans.
Non-Performing Assets	The following table presents non-performing assets: June 30, December 31, (in thousands) Non-accrual loans $ 125,037 $ 125,098 Loans 90 days or more past due and still accruing 14,767 16,057 Total non-performing loans 139,804 141,155 OREO (1) 5,418 6,831 Total non-performing assets $ 145,222 $ 147,986 (1) Excludes $10.6 million of residential mortgage properties for which formal foreclosure proceedings were in process as of June 30, 2020.
Past due Loan Status and Non-Accrual Loans by Portfolio Segment	The following tables present the aging of the amortized cost basis of loans, by class segment: 30-59 60-89 ≥ 90 Days Days Past Days Past Past Due Non- Due Due and Accruing Accrual Current Total (in thousands) June 30, 2020 Real estate – commercial mortgage $ 16,431 $ 1,190 $ 1,599 $ 40,775 $ 6,874,941 $ 6,934,936 Commercial and industrial 2,970 1,215 351 39,379 5,927,286 5,971,201 Real estate – residential mortgage 11,401 5,761 5,997 16,890 2,822,177 2,862,226 Real estate – home equity 3,431 1,593 3,889 7,688 1,234,854 1,251,455 Real estate – construction 2,606 414 1,043 3,482 965,364 972,909 Consumer 1,851 471 334 — 462,954 465,610 Equipment lease financing and other 795 216 1,554 16,823 226,997 246,385 Total $ 39,485 $ 10,860 $ 14,767 $ 125,037 $ 18,514,573 $ 18,704,722 30-59 Days Past 60-89 ≥ 90 Days Non- Current Total (in thousands) December 31, 2019 Real estate – commercial mortgage $ 10,912 $ 1,543 $ 4,113 $ 33,166 $ 6,651,042 $ 6,700,776 Commercial and industrial 2,302 2,630 1,385 48,106 4,392,278 4,446,701 Real estate – residential mortgage 26,982 7,309 5,735 16,676 2,584,763 2,641,465 Real estate – home equity 9,635 2,706 3,564 7,004 1,292,035 1,314,944 Real estate – construction 1,715 900 688 3,618 964,158 971,079 Consumer 4,228 922 458 — 457,556 463,164 Equipment lease financing and other 552 3,460 114 16,528 278,743 299,397 Total $ 56,326 $ 19,470 $ 16,057 $ 125,098 $ 16,620,575 $ 16,837,526
Troubled Debt Restructurings on Financing Receivables	The following table presents TDRs, by class segment: June 30, December 31, (in thousands) Real estate - residential mortgage $ 28,030 $ 21,551 Real estate - commercial mortgage 20,407 13,330 Real estate - home equity 15,548 15,068 Commercial and industrial 4,398 5,193 Consumer — 8 Total accruing TDRs 68,383 55,150 Non-accrual TDRs (1) 31,575 20,825 Total TDRs $ 99,958 $ 75,975 (1) Included in non-accrual loans in the preceding table detailing non-performing assets.
Loan Terms Modified Under Troubled Debt Restructurings	The following table presents TDRs, by class segment, for loans that were modified during the three and six months ended June 30, 2020 and 2019: Three months ended June 30 Six months ended June 30 2020 2019 2020 2019 Number of Loans Recorded Investment Number of Loans Recorded Investment Number of Loans Recorded Investment Number of Loans Recorded Investment (dollars in thousands) Real estate - residential mortgage 33 $ 8,505 1 $ 516 40 $ 9,165 5 $ 1,433 Real estate - commercial mortgage 6 16,082 2 1,785 7 16,474 2 1,785 Real estate - home equity 19 1,609 22 1,125 27 2,186 34 1,954 Commercial and industrial 13 1,304 4 586 14 1,378 8 3,046 Consumer 8 185 — — 8 185 — — Total 79 $ 27,685 29 $ 4,012 96 $ 29,388 49 $ 8,218

Mortgage Servicing Rights (Tabl

Mortgage Servicing Rights (Tables)	6 Months Ended
	Jun. 30, 2020
Transfers and Servicing [Abstract]
Summary of Changes in Mortgage Servicing Rights	The following table summarizes the changes in MSRs, which are included in other assets on the consolidated balance sheets: Three months ended June 30 Six months ended June 30 2020 2019 2020 2019 (in thousands) Amortized cost: Balance at beginning of period $ 38,854 $ 38,504 $ 39,267 $ 38,573 Originations of MSRs 2,772 1,861 4,250 3,086 Amortization (2,934) (1,539) (4,825) (2,833) Balance at end of period $ 38,692 $ 38,826 $ 38,692 $ 38,826 Valuation allowance: Balance at beginning of period $ (1,100) $ — $ — $ — Additions to valuation allowance (6,600) — (7,700) — Balance at end of period $ (7,700) $ — $ (7,700) $ — Net MSRs at end of period $ 30,992 $ 38,826 $ 30,992 $ 38,826 Estimated fair value of MSRs at end of period $ 30,992 $ 44,916 $ 30,992 $ 44,916

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of Notional Amounts and Fair Values of Derivative Financial Instruments	The following table presents a summary of the notional amounts and fair values of derivative financial instruments: June 30, 2020 December 31, 2019 Notional Asset Notional Asset (in thousands) Interest Rate Locks with Customers Positive fair values $ 463,202 $ 10,614 $ 132,260 $ 1,123 Negative fair values 6,003 (51) 9,783 (53) Forward Commitments Positive fair values — — 75,000 63 Negative fair values 395,515 (2,057) 180,000 (371) Interest Rate Swaps with Customers Positive fair values 3,587,221 390,701 2,903,489 143,484 Negative fair values 12,288 (4) 376,705 (695) Interest Rate Swaps with Dealer Counterparties Positive fair values 12,288 4 376,705 695 Negative fair values 3,587,221 (188,515) 2,903,489 (75,327) Foreign Exchange Contracts with Customers Positive fair values 7,174 79 3,373 38 Negative fair values 5,248 (92) 7,283 (154) Foreign Exchange Contracts with Correspondent Banks Positive fair values 10,090 137 9,028 192 Negative fair values 5,774 (76) 4,976 (45)
Summary of Fair Value Gains and Losses on Derivative Financial Instruments	The following table presents a summary of the fair value gains (losses) on derivative financial instruments: Consolidated Statements of Income Classification Three months ended June 30 Six months ended June 30 2020 2019 2020 2019 (in thousands) Mortgage banking derivatives (1) Mortgage banking income $ 6,704 $ (48) $ 7,744 $ 614 Interest rate swaps Other expense 10 296 82 147 Foreign exchange contracts Other income (102) (14) 17 34 Net fair value gains on derivative financial instruments $ 6,612 $ 234 $ 7,843 $ 795 (1) Includes interest rate locks with customers and forward commitments.
Summary of Corporation's Mortgage Loans Held for Sale	The following table presents a summary of mortgage loans held for sale and the impact of the fair value election on the consolidated financial statements as of the periods shown: June 30, December 31, (in thousands) Amortized cost (1) $ 74,868 $ 37,396 Fair value 77,415 37,828 (1) Cost basis of mortgage loans held for sale represents the unpaid principal balance.
Summary of Offsetting Derivative Assets	The following table presents the Corporation's financial instruments that are eligible for offset, and the effects of offsetting, on the consolidated balance sheets: Gross Amounts Gross Amounts Not Offset Recognized on the Consolidated on the Balance Sheets Consolidated Financial Cash Net Balance Sheets Instruments (1) Collateral (2) Amount (in thousands) June 30, 2020 Interest rate swap derivative assets $ 390,706 $ (4) $ — $ 390,702 Foreign exchange derivative assets with correspondent banks 137 (76) — 61 Total $ 390,843 $ (80) $ — $ 390,763 Interest rate swap derivative liabilities $ 188,519 $ (4) $ (188,515) $ — Foreign exchange derivative liabilities with correspondent banks 76 (76) — — Total $ 188,595 $ (80) $ (188,515) $ — December 31, 2019 Interest rate swap derivative assets $ 144,179 $ (757) $ — $ 143,422 Foreign exchange derivative assets with correspondent banks 192 (45) — 147 Total $ 144,371 $ (802) $ — $ 143,569 Interest rate swap derivative liabilities $ 76,022 $ (757) $ (75,265) $ — Foreign exchange derivative liabilities with correspondent banks 45 (45) — — Total $ 76,067 $ (802) $ (75,265) $ — (1) For interest rate swap assets, amounts represent any derivative liability fair values that could be offset in the event of counterparty or customer default. For interest rate swap liabilities, amounts represent any derivative asset fair values that could be offset in the event of counterparty or customer default. (2) Amounts represent cash collateral received from the counterparty or posted by the Corporation on interest rate swap transactions and foreign exchange contracts with financial institution counterparties. Interest rate swaps with customers are collateralized by the same collateral securing the underlying loans to those borrowers. Cash and securities collateral amounts are included in the table only to the extent of the net derivative fair values.
Summary of Offsetting Derivative Liabilities	The following table presents the Corporation's financial instruments that are eligible for offset, and the effects of offsetting, on the consolidated balance sheets: Gross Amounts Gross Amounts Not Offset Recognized on the Consolidated on the Balance Sheets Consolidated Financial Cash Net Balance Sheets Instruments (1) Collateral (2) Amount (in thousands) June 30, 2020 Interest rate swap derivative assets $ 390,706 $ (4) $ — $ 390,702 Foreign exchange derivative assets with correspondent banks 137 (76) — 61 Total $ 390,843 $ (80) $ — $ 390,763 Interest rate swap derivative liabilities $ 188,519 $ (4) $ (188,515) $ — Foreign exchange derivative liabilities with correspondent banks 76 (76) — — Total $ 188,595 $ (80) $ (188,515) $ — December 31, 2019 Interest rate swap derivative assets $ 144,179 $ (757) $ — $ 143,422 Foreign exchange derivative assets with correspondent banks 192 (45) — 147 Total $ 144,371 $ (802) $ — $ 143,569 Interest rate swap derivative liabilities $ 76,022 $ (757) $ (75,265) $ — Foreign exchange derivative liabilities with correspondent banks 45 (45) — — Total $ 76,067 $ (802) $ (75,265) $ — (1) For interest rate swap assets, amounts represent any derivative liability fair values that could be offset in the event of counterparty or customer default. For interest rate swap liabilities, amounts represent any derivative asset fair values that could be offset in the event of counterparty or customer default. (2) Amounts represent cash collateral received from the counterparty or posted by the Corporation on interest rate swap transactions and foreign exchange contracts with financial institution counterparties. Interest rate swaps with customers are collateralized by the same collateral securing the underlying loans to those borrowers. Cash and securities collateral amounts are included in the table only to the extent of the net derivative fair values.

Tax Credit Investments (Tables)

Tax Credit Investments (Tables)	6 Months Ended
	Jun. 30, 2020
Income Tax Disclosure [Abstract]
Summary Of Affordable Housing Tax Credit Investments And Other Credit Investments	The following table presents the balances of the Corporation's TCIs and related unfunded commitments: June 30, December 31, 2020 2019 Included in other assets: (in thousands) Affordable housing tax credit investment, net $ 139,956 $ 153,351 Other tax credit investments, net 62,932 64,354 Total TCIs, net $ 202,888 $ 217,705 Included in other liabilities: Unfunded affordable housing tax credit commitments $ 12,513 $ 16,684 Other tax credit liabilities 54,823 55,105 Total unfunded tax credit commitments and liabilities $ 67,336 $ 71,789 The following table presents other information relating to the Corporation's TCIs: Three Months Ended Six Months Ended June 30 June 30 2020 2019 2020 2019 Components of income taxes: (in thousands) Affordable housing tax credits and other tax benefits $ (7,194) $ (7,575) $ (14,388) $ (15,150) Other tax credit investment credits and tax benefits (941) (1,135) (1,882) (2,271) Amortization of affordable housing investments, net of tax benefit 5,023 5,494 10,047 10,989 Deferred tax expense 208 239 416 477 Total net reduction in income tax expense $ (2,904) $ (2,977) $ (5,807) $ (5,955) Amortization of TCIs: Affordable housing tax credits investment $ 1,022 $ 823 $ 2,044 $ 1,645 Other tax credit investment amortization 428 669 856 1,338 Total amortization of TCIs $ 1,450 $ 1,492 $ 2,900 $ 2,983

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income (Tables)	6 Months Ended
	Jun. 30, 2020
Equity [Abstract]
Changes in other comprehensive income	The following table presents changes in other comprehensive income: Before-Tax Amount Tax Effect Net of Tax Amount Three months ended June 30, 2020 (in thousands) Unrealized gain on securities $ 44,199 $ (9,775) $ 34,424 Reclassification adjustment for securities gains included in net income (1) (3,005) 664 (2,341) Amortization of net unrealized losses on AFS securities transferred to HTM (2) 1,019 (226) 793 Amortization of net unrecognized pension and postretirement items (3) 328 (73) 255 Total Other Comprehensive Income $ 42,541 $ (9,410) $ 33,131 Three months ended June 30, 2019 Unrealized gain on securities $ 31,994 $ (7,077) $ 24,917 Reclassification adjustment for securities gains included in net income (1) (176) 39 (137) Amortization of net unrealized losses on AFS securities transferred to HTM (2) 1,311 (290) 1,021 Non-credit related unrealized losses on other-than-temporarily impaired debt securities (770) 170 (600) Amortization of net unrecognized pension and postretirement items (3) 353 (78) 275 Total Other Comprehensive Income $ 32,712 $ (7,236) $ 25,476 Six months ended June 30, 2020 Unrealized gain on securities (3) $ 66,581 $ (14,728) $ 51,853 Reclassification adjustment for securities gains included in net income (1) (3,051) 675 (2,376) Amortization of net unrealized losses on AFS securities transferred to HTM (2) (3) 2,040 (451) 1,589 Amortization of net unrecognized pension and postretirement items (4) 656 (146) 510 Total Other Comprehensive Income $ 66,226 $ (14,650) $ 51,576 Six months ended June 30, 2019 Unrealized gain on securities $ 58,056 $ (12,841) $ 45,215 Reclassification adjustment for securities gains included in net income (1) (241) 53 (188) Amortization of net unrealized losses on AFS securities transferred to HTM (2) 2,563 (568) 1,995 Non-credit related unrealized losses on other-than-temporarily impaired debt securities (875) 193 (682) Amortization of net unrecognized pension and postretirement items (3) 727 (161) 566 Total Other Comprehensive Income $ 60,230 $ (13,324) $ 46,906 (1) Amounts reclassified out of accumulated other comprehensive income. Before-tax amounts included in "Investment securities gains, net" on the Consolidated Statements of Income. See Note 3, "Investment Securities," for additional details. (2) Amounts reclassified out of accumulated other comprehensive income. Before-tax amounts included as a reduction to "Interest Income" on the Consolidated Statements of Income. (3) Amounts reclassified out of accumulated other comprehensive income. Before-tax amounts included in "Salaries and employee benefits" on the Consolidated Statements of Income. See Note 12, "Employee Benefit Plans," for additional details.
Changes in each component of accumulated other comprehensive income	The following table presents changes in each component of accumulated other comprehensive income (loss), net of tax: Unrealized Gains (Losses) on Investment Securities Unrealized Non-Credit Gains (Losses) on Other-Than-Temporarily Impaired Debt Securities Unrecognized Pension and Postretirement Plan Income (Costs) Total (in thousands) Three months ended June 30, 2020 Balance at March 31, 2020 $ 33,054 $ — $ (14,746) $ 18,308 Other comprehensive income before reclassifications 34,424 — — 34,424 Amounts reclassified from accumulated other comprehensive income (2,341) — 255 (2,086) Amortization of net unrealized losses on AFS securities transferred to HTM 793 — — 793 Balance at June 30, 2020 $ 65,930 $ — $ (14,491) $ 51,439 Three months ended June 30, 2019 Balance at March 31, 2019 $ (23,433) $ 598 $ (14,798) $ (37,633) Other comprehensive income before reclassifications 24,917 (600) — 24,317 Amounts reclassified from accumulated other comprehensive income (137) — 275 138 Amortization of net unrealized losses on AFS securities transferred to HTM 1,021 — — 1,021 Balance at June 30, 2019 $ 2,368 $ (2) $ (14,523) $ (12,157) Six months ended June 30, 2020 Balance at December 31, 2019 $ 14,864 $ — $ (15,001) $ (137) Other comprehensive income before reclassifications 51,853 — — 51,853 Amounts reclassified from accumulated other comprehensive income (2,376) — 510 (1,866) Amortization of net unrealized losses on AFS securities transferred to HTM 1,589 — — 1,589 Balance at June 30, 2020 $ 65,930 $ — $ (14,491) $ 51,439 Six months ended June 30, 2019 Balance at December 31, 2018 $ (44,654) $ 680 $ (15,089) $ (59,063) Other comprehensive income before reclassifications 45,215 (682) — 44,533 Amounts reclassified from accumulated other comprehensive income (188) — 566 378 Amortization of net unrealized losses on AFS securities transferred to HTM 1,995 — — 1,995 Balance at June 30, 2019 $ 2,368 $ (2) $ (14,523) $ (12,157)

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2020
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	The following tables present assets and liabilities measured at fair value on a recurring basis and reported on the consolidated balance sheets: June 30, 2020 Level 1 Level 2 Level 3 Total (in thousands) Loans held for sale $ — $ 77,415 $ — $ 77,415 Available for sale investment securities: State and municipal securities — 893,682 — 893,682 Corporate debt securities — 325,353 — 325,353 Collateralized mortgage obligations — 578,394 — 578,394 Residential mortgage-backed securities — 160,868 — 160,868 Commercial mortgage-backed securities — 585,143 — 585,143 Auction rate securities — — 100,859 100,859 Total available for sale investment securities — 2,543,440 100,859 2,644,299 Other assets: Investments held in Rabbi Trust 20,555 — — 20,555 Derivative assets 216 401,319 — 401,535 Total assets $ 20,771 $ 3,022,174 $ 100,859 $ 3,143,804 Other liabilities: Deferred compensation liabilities $ 20,555 $ — $ — $ 20,555 Derivative liabilities 168 190,627 — 190,795 Total liabilities $ 20,723 $ 190,627 $ — $ 211,350 December 31, 2019 Level 1 Level 2 Level 3 Total (in thousands) Loans held for sale $ — $ 37,828 $ — $ 37,828 Available for sale investment securities: State and municipal securities — 652,927 — 652,927 Corporate debt securities — 374,957 2,400 377,357 Collateralized mortgage obligations — 693,718 — 693,718 Residential mortgage-backed securities — 177,312 — 177,312 Commercial mortgage-backed securities — 494,297 — 494,297 Auction rate securities — — 101,926 101,926 Total available for sale investment securities — 2,393,211 104,326 2,497,537 Other assets: Investments held in Rabbi Trust 22,213 — — 22,213 Derivative assets 230 145,365 — 145,595 Total assets $ 22,443 $ 2,576,404 $ 104,326 $ 2,703,173 Other liabilities: Deferred compensation liabilities $ 22,213 $ — $ — $ 22,213 Derivative liabilities 199 76,447 — 76,646 Total liabilities $ 22,412 $ 76,447 $ — $ 98,859
Schedule of Changes in Assets and Liabilities Measured at Fair Value on a Recurring Basis using Level 3 Inputs	The following table presents the changes in the Corporation’s available for sale investment securities measured at fair value on a recurring basis using unobservable inputs (Level 3): Pooled Trust Single-issuer ARCs Three months ended June 30, 2020 (in thousands) Balance at March 31, 2020 $ — $ 2,160 $ 93,666 Sales — (2,160) — Unrealized adjustment to fair value (1) — — 7,193 Balance at June 30, 2020 $ — $ — $ 100,859 Three months ended June 30, 2019 Balance at March 31, 2019 $ 770 $ 2,430 $ 102,810 Sales (770) — — Unrealized adjustment to fair value (1) — (60) 555 Balance at June 30, 2019 $ — $ 2,370 $ 103,365 Six months ended June 30, 2020 Balance at December 31, 2019 $ — $ 2,400 $ 101,926 Sales — (2,160) — Unrealized adjustment to fair value (1) — (242) (1,067) Discount accretion — 2 — Balance at June 30, 2020 $ — $ — $ 100,859 Six months ended June 30, 2019 Balance at December 31, 2018 $ 875 $ 2,400 $ 102,994 Sales (770) — — Unrealized adjustment to fair value (1) (105) (30) 371 Balance at June 30, 2019 $ — $ 2,370 $ 103,365 (1) Pooled trust preferred securities, single-issuer trust preferred securities and ARCs are classified as available for sale investment securities; as such, the unrealized adjustment to fair value was recorded as an unrealized holding gain (loss) and included as a component of "available for sale at estimated fair value" on the consolidated balance sheets.
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis	The following table presents Level 3 financial assets measured at fair value on a nonrecurring basis: June 30, 2020 December 31, 2019 (in thousands) Net Loans $ 108,746 $ 144,807 OREO 5,418 6,831 MSRs (1) 30,992 45,193 Total assets $ 145,156 $ 196,831
Details of Book Value and Fair Value of Financial Instruments	he following tables present the carrying amounts and estimated fair values of the Corporation’s financial instruments as of the periods shown. A general description of the methods and assumptions used to estimate such fair values follows: June 30, 2020 Estimated Fair Value Carrying Amount Level 1 Level 2 Level 3 Total (in thousands) FINANCIAL ASSETS Cash and cash equivalents $ 1,058,599 $ 1,058,599 $ — $ — $ 1,058,599 FRB and FHLB stock 91,042 — 91,042 — 91,042 Loans held for sale 77,415 — 77,415 — 77,415 AFS securities 2,644,299 — 2,543,440 100,859 2,644,299 HTM securities 330,514 — 354,109 — 354,109 Net Loans 18,448,185 — — 18,173,117 18,173,117 Accrued interest receivable 73,720 73,720 — — 73,720 Other assets 706,518 268,789 401,319 36,410 706,518 FINANCIAL LIABILITIES Demand and savings deposits $ 17,006,353 $ 17,006,353 $ — $ — $ 17,006,353 Brokered deposits 310,689 268,618 42,071 — 310,689 Time deposits 2,567,166 — 2,599,932 — 2,599,932 Short-term borrowings 572,551 572,551 — — 572,551 Accrued interest payable 11,571 11,571 — — 11,571 FHLB advances and long-term debt 1,295,196 — 1,342,497 — 1,342,497 Other liabilities 369,624 162,614 190,627 16,383 369,624 December 31, 2019 Estimated Fair Value Carrying Amount Level 1 Level 2 Level 3 Total (in thousands) FINANCIAL ASSETS Cash and cash equivalents $ 517,791 $ 517,791 $ — $ — $ 517,791 FRB and FHLB stock 97,422 — 97,422 — 97,422 Loans held for sale 37,828 — 37,828 — 37,828 AFS securities 2,497,537 — 2,393,211 104,326 2,497,537 HTM securities 369,841 — 383,705 — 383,705 Net Loans 16,673,904 — — 16,485,122 16,485,122 Accrued interest receivable 60,898 60,898 — — 60,898 Other assets 431,565 234,176 145,365 52,024 431,565 FINANCIAL LIABILITIES Demand and savings deposits $ 14,327,453 $ 14,327,453 $ — $ — $ 14,327,453 Brokered deposits 264,531 223,982 40,549 — 264,531 Time deposits 2,801,930 — 2,828,988 — 2,828,988 Short-term borrowings 883,241 883,241 — — 883,241 Accrued interest payable 8,834 8,834 — — 8,834 FHLB advances and long-term debt 881,769 — 878,385 — 878,385 Other liabilities 221,542 142,508 76,447 2,587 221,542

Net Income Per Share (Tables)

Net Income Per Share (Tables)	6 Months Ended
	Jun. 30, 2020
Earnings Per Share [Abstract]
Reconciliation of Weighted Average Common Shares Outstanding	A reconciliation of weighted average shares outstanding used to calculate basic net income per share and diluted net income per share follows (in thousands, except per share data): Three months ended June 30 Six months ended June 30 2020 2019 2020 2019 Weighted average shares outstanding (basic) 161,715 168,343 162,582 169,109 Impact of common stock equivalents 552 825 744 933 Weighted average shares outstanding (diluted) 162,267 169,168 163,326 170,042 Per share: Basic $ 0.24 $ 0.36 $ 0.40 $ 0.69 Diluted 0.24 0.35 0.40 0.68

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2020
Share-based Payment Arrangement [Abstract]
Summary of Compensation Expense and Related Tax Benefits	The following table presents compensation expense and the related tax benefits for equity awards recognized in the consolidated statements of income: Three months ended June 30 Six months ended June 30 2020 2019 2020 2019 (in thousands) Compensation expense $ 1,911 $ 1,788 $ 3,530 $ 3,348 Tax benefit (403) (412) (747) (743) Stock-based compensation expense, net of tax benefit $ 1,508 $ 1,376 $ 2,783 $ 2,605

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	6 Months Ended
	Jun. 30, 2020
Retirement Benefits [Abstract]
Schedule of Defined Benefit Plans Disclosures	The net periodic pension cost for the Corporation’s Defined Benefit Pension Plan ("Pension Plan") consisted of the following components: Three months ended June 30 Six months ended June 30 2020 2019 2020 2019 (in thousands) Interest cost $ 681 $ 815 $ 1,362 $ 1,630 Expected return on plan assets (982) (689) (1,964) (1,378) Net amortization and deferral 465 495 930 990 Net periodic pension cost $ 164 $ 621 $ 328 $ 1,242 The components of the net benefit for the Corporation’s Postretirement Benefits Plan ("Postretirement Plan") consisted of the following components: Three months ended June 30 Six months ended June 30 2020 2019 2020 2019 (in thousands) Interest cost $ 11 $ 15 $ 22 $ 30 Net accretion and deferral (137) (139) (274) (278) Net periodic benefit $ (126) $ (124) $ (252) $ (248)

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Summary of Outstanding Commitments to Extend Credit and Letters of Credit	The outstanding amounts of commitments to extend credit and letters of credit were as follows: June 30, December 31, 2019 (in thousands) Commitments to extend credit $ 8,140,293 $ 6,689,519 Standby letters of credit 294,647 303,020 Commercial letters of credit 52,100 50,432

Basis of Presentation Narrative

Basis of Presentation Narrative (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]
Increase in ACL	$ 272,920	$ 257,471		$ 166,209	$ 176,941	$ 170,372	$ 169,410
Change in retained earnings	(1,059,160)			(1,079,391)
Accounting Standards Update 2016-13 | Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase in ACL			$ 58,300
Change in retained earnings			43,800
Increase in deferred tax assets			12,400
Residential Mortgage
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase in ACL for certain OBS credit exposure	$ 1,100			$ 3,200
Residential Mortgage | Accounting Standards Update 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase in ACL for certain OBS credit exposure			(2,100)
Residential Mortgage | Accounting Standards Update 2016-13 | Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase in ACL for certain OBS credit exposure			$ (2,100)

Restrictions on Cash and Cash_2

Restrictions on Cash and Cash Equivalents (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Restricted Cash and Cash Equivalents Items [Line Items]
Collateral	$ 473.2	$ 199.6
Subsidiaries
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash reserves due from subsidiary		$ 218.9

Investment Securities Schedule

Investment Securities Schedule of Amortized Cost and Fair Values of Investment Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Schedule of Investments [Line Items]
Amortized Cost	$ 2,548,261
Gross Unrealized Gains	105,138
Gross Unrealized Losses	(9,100)
Estimated Fair Value	2,644,299	$ 2,497,537
Amortized Cost, Held to Maturity	330,514	369,841
HTM securities	354,109
US States and Political Subdivisions Debt Securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	852,617
Gross Unrealized Gains	41,292
Gross Unrealized Losses	(227)
Estimated Fair Value	893,682
Amortized Cost		638,125
Gross Unrealized Gains		15,826
Gross Unrealized Losses		(1,024)
Estimated Fair Value		652,927
Corporate Debt Securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	312,507
Gross Unrealized Gains	15,168
Gross Unrealized Losses	(2,322)
Estimated Fair Value	325,353
Amortized Cost		370,401
Gross Unrealized Gains		8,490
Gross Unrealized Losses		(1,534)
Estimated Fair Value		377,357
Collateralized Mortgage Obligations [Member]
Schedule of Investments [Line Items]
Amortized Cost	559,281
Gross Unrealized Gains	19,113
Gross Unrealized Losses	0
Estimated Fair Value	578,394
Amortized Cost		682,307
Gross Unrealized Gains		11,726
Gross Unrealized Losses		(315)
Estimated Fair Value		693,718
Mortgage-Backed Securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	156,152
Gross Unrealized Gains	4,716
Gross Unrealized Losses	0
Estimated Fair Value	160,868
Amortized Cost, Held to Maturity	330,514	369,841
Gross Unrealized Gains, Held to Maturity	23,595	13,864
Gross Unrealized Losses, Held to Maturity	0	0
HTM securities	354,109	383,705
Amortized Cost		177,183
Gross Unrealized Gains		1,078
Gross Unrealized Losses		(949)
Estimated Fair Value		177,312
Commercial Mortgage Backed Securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	560,294
Gross Unrealized Gains	24,849
Gross Unrealized Losses	0
Estimated Fair Value	585,143
Amortized Cost		489,603
Gross Unrealized Gains		6,471
Gross Unrealized Losses		(1,777)
Estimated Fair Value		494,297
Auction Rate Securities [Member]
Schedule of Investments [Line Items]
Amortized Cost	107,410
Gross Unrealized Gains	0
Gross Unrealized Losses	(6,551)
Estimated Fair Value	$ 100,859
Amortized Cost		107,410
Gross Unrealized Gains		0
Gross Unrealized Losses		(5,484)
Estimated Fair Value		101,926
Debt Securities [Member]
Schedule of Investments [Line Items]
Amortized Cost		2,465,029
Gross Unrealized Gains		43,591
Gross Unrealized Losses		(11,083)
Estimated Fair Value		$ 2,497,537

Investment Securities Schedul_2

Investment Securities Schedule of Amortized Cost and Fair Values of Debt Securities by Contractual Maturities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Amortized Cost
Due in one year or less	$ 12,731
Due from one year to five years	31,144
Due from five years to ten years	301,186
Due after ten years	927,473
Amortized cost, before securities without debt maturities	1,272,534
Amortized Cost	2,548,261
Estimated Fair Value
Due in one year or less	12,731
Due from one year to five years	32,687
Due from five years to ten years	313,583
Due after ten years	960,893
Available for sale securities, debt maturities, before securities without single maturities	1,319,894
Estimated Fair Value	2,644,299	$ 2,497,537
Amortized Cost
Due in one year or less	0
Due from one year to five years	0
Due from five years to ten years	0
Due after ten years	0
Debt securities, held-to-maturity, maturity, allocated and single maturity date, amortized cost, total	0
Amortized Cost, Held to Maturity	330,514	369,841
Estimated Fair Value
Due in one year or less	0
Due from one year to five years	0
Due from five years to ten years	0
Due after ten years	0
Debt securities, held-to-maturity, maturity, Allocated and single maturity date, fair value	0
Estimated Fair Value, Held to Maturity	354,109
Collateralized Mortgage Obligations [Member]
Amortized Cost
Available-for-sale securities, amortized cost without single maturity date	559,281
Amortized Cost	559,281
Estimated Fair Value
Available-for-sale securities, debt maturities, without single maturity date, fair value	578,394
Estimated Fair Value	578,394
Amortized Cost
Debt securities, held-to-maturity, maturity, without single maturity date, amortized cost	0
Estimated Fair Value
Debt securities, held-to-maturity, maturity, without single maturity date, fair value	0
Commercial Mortgage Backed Securities [Member]
Amortized Cost
Available-for-sale securities, amortized cost without single maturity date	560,294
Amortized Cost	560,294
Estimated Fair Value
Available-for-sale securities, debt maturities, without single maturity date, fair value	585,143
Estimated Fair Value	585,143
Amortized Cost
Debt securities, held-to-maturity, maturity, without single maturity date, amortized cost	0
Estimated Fair Value
Debt securities, held-to-maturity, maturity, without single maturity date, fair value	0
Mortgage-Backed Securities [Member]
Amortized Cost
Available-for-sale securities, amortized cost without single maturity date	156,152
Amortized Cost	156,152
Estimated Fair Value
Available-for-sale securities, debt maturities, without single maturity date, fair value	160,868
Estimated Fair Value	160,868
Amortized Cost
Debt securities, held-to-maturity, maturity, without single maturity date, amortized cost	330,514
Amortized Cost, Held to Maturity	330,514	369,841
Estimated Fair Value
Debt securities, held-to-maturity, maturity, without single maturity date, fair value	354,109
Estimated Fair Value, Held to Maturity	$ 354,109	$ 383,705

Investment Securities Summary o

Investment Securities Summary of Gains and Losses from Equity and Debt Securities, and Losses from Other-than-Temporary Impairment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Gain (Loss) on Securities [Line Items]
Debt securities, Gross Realized Gains	$ 6,334	$ 3,012	$ 6,451	$ 3,269
Debt securities, Gross Realized Losses	(3,329)	(2,836)	(3,400)	(3,028)
Debt securities, Net Gains (Losses)	$ 3,005	$ 176	$ 3,051	$ 241

Investment Securities Gross Unr

Investment Securities Gross Unrealized Losses and Fair Values of Investments by Category and Length of Time in a Continuous Unrealized Loss Position (Details)	Jun. 30, 2020USD ($)Security	Dec. 31, 2019USD ($)Security
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 115,864,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (2,549,000)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | Security	177
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 100,859,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	(6,551,000)
Debt Securities, Available-for-sale, Unrealized Loss Position	216,723,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ (9,100,000)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | Security	24
State and Municipal Securities [Member]
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 30,378,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (227,000)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | Security	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0
Debt Securities, Available-for-sale, Unrealized Loss Position	30,378,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ (227,000)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	9	44
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 136,344,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		(1,024,000)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		136,344,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		$ (1,024,000)
Corporate Debt Securities [Member]
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 85,486,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (2,322,000)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | Security	0	8
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0
Debt Securities, Available-for-sale, Unrealized Loss Position	85,486,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ (2,322,000)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	15	5
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 30,719,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		(346,000)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		18,759,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		(1,188,000)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		49,478,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		$ (1,534,000)
Collateralized Mortgage Obligations [Member]
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | Security		1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions		5
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 33,865,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		(190,000)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		5,330,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		(125,000)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		39,195,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		$ (315,000)
Residential Mortgage Backed Securities [Member]
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | Security		26
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions		5
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 12,247,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		(40,000)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		127,373,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		(909,000)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		139,620,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		$ (949,000)
Commercial Mortgage Backed Securities [Member]
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | Security		0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions		7
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 121,340,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		(1,777,000)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		121,340,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		$ (1,777,000)
Auction Rate Securities [Member]
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | Security	177	177
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 100,859,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	(6,551,000)
Debt Securities, Available-for-sale, Unrealized Loss Position	100,859,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ (6,551,000)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		101,926,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		(5,484,000)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		101,926,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		$ (5,484,000)
Debt Securities [Member]
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | Security		212
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions		66
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 334,515,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		(3,377,000)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		253,388,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		(7,706,000)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		587,903,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		$ (11,083,000)

Investment Securities Summary_2

Investment Securities Summary of Amortized Cost and Fair Values of Corporate Debt Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 2,548,261
Estimated Fair Value	2,644,299	$ 2,497,537
Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	312,507
Estimated Fair Value	$ 325,353

Investment Securities Narrative

Investment Securities Narrative (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
Schedule of Investments [Line Items]
Amortized cost	$ 2,548,261		$ 2,548,261
Available-for-sale Securities, Fair Value Disclosure	2,644,299		2,644,299		$ 2,497,537
HTM, at amortized cost	330,514		330,514		369,841
HTM securities	354,109		354,109
Prepayment penalty on FHLB advances	2,878	$ 0	2,878	$ 0
Debt Securities [Member]
Schedule of Investments [Line Items]
HTM, at amortized cost	79,000		79,000
HTM securities	82,000		82,000
Debt Securities, Held-to-maturity, Sold, Realized Gain (Loss)	3,000
Prepayment penalty on FHLB advances	2,900
Residential Mortgage Backed Securities [Member]
Schedule of Investments [Line Items]
Amortized cost	156,152		156,152
Available-for-sale Securities, Fair Value Disclosure	160,868		160,868
HTM, at amortized cost	330,514		330,514		369,841
HTM securities	354,109		354,109		383,705
US States and Political Subdivisions Debt Securities [Member]
Schedule of Investments [Line Items]
Amortized cost	852,617		852,617
Available-for-sale Securities, Fair Value Disclosure	893,682		893,682
Collateral Pledged [Member]
Schedule of Investments [Line Items]
Securities pledged as collateral	$ 468,800		$ 468,800		$ 462,600

Loans and Allowance for Credi_3

Loans and Allowance for Credit Losses Summary Of Gross Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 18,728,480	$ 16,864,336
Unearned income	(23,758)	(26,810)
Net Loans	18,704,722	16,837,526	$ 16,368,458
Real estate - commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	6,934,936	6,700,776
Net Loans	6,934,936	6,700,776	6,497,973
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	5,971,201	4,446,701
Net Loans	5,971,201	4,446,701	4,365,248
Real estate - residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	2,862,226	2,641,465
Net Loans	2,862,226	2,641,465	2,451,966
Real-estate - home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,251,455	1,314,944
Net Loans	1,251,455	1,314,944	1,386,974
Real-estate - construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	972,909	971,079
Net Loans	972,909	971,079	922,547
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	465,610	463,164
Net Loans	465,610	463,164	$ 452,874
Equipment lease financing and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	266,521	322,625
Overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 3,622	$ 3,582

Loans and Allowance for Credi_4

Loans and Allowance for Credit Losses Allowance for Credit Losses (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Receivables [Abstract]
ACL - loans	$ 256,537		$ 163,622	$ 170,233	$ 162,109	$ 160,537
ACL - OBS credit exposure	16,383		2,587
Total ACL	$ 272,920	$ 257,471	$ 166,209	$ 176,941	$ 170,372	$ 169,410

Loans and Allowance for Credi_5

Loans and Allowance for Credit Losses Activity in the Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Jan. 01, 2020
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 257,471	$ 166,209
Impact of adopting CECL				$ (43,807)
Loans charged off	8,047	22,050
Recoveries of loans previously charged off	3,926	6,813
Current period net charge-offs	(4,121)	(15,237)
Provision for credit losses	19,570	63,600
Ending balance	272,920	272,920
Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Impact of adopting CECL			$ 0	$ 58,348
Off-Balance Sheet
Allowance for Loan and Lease Losses [Roll Forward]
Provision for credit losses	$ 2,600	1,200
Off-Balance Sheet | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance		$ 12,600

Loans and Allowance for Credi_6

Loans and Allowance for Credit Losses Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Mar. 31, 2020	Jan. 01, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	$ 257,471	$ 170,372	$ 166,209	$ 169,410
Impact of adopting CECL						$ (43,807)
Loans charged off	8,047		22,050
Recoveries of loans previously charged off	3,926		6,813
Current period net charge-offs	(4,121)		(15,237)
Provision for credit losses	19,570		63,600
Ending balance	272,920	176,941	272,920	176,941
Beginning balance		162,109	163,622	160,537
Loans charged off		(3,711)		(10,080)
Recovery of loans previously charged off		5,255		7,486
Net loans recovered (charged off)		1,544		(2,594)
Allowance for loan and lease losses, provision for loss, net of provision applied to unfunded commitments		6,580		12,290
Ending balance	256,537	170,233	256,537	170,233
Provision for Loan and Lease Losses	19,570	5,025	63,600	10,125
Financing Receivable, Allowance for Credit Losses
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for Loan and Lease Losses	1,600		2,200
Real estate - commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance		51,946		52,889
Loans charged off		(230)		(1,375)
Recovery of loans previously charged off		169		305
Net loans recovered (charged off)		(61)		(1,070)
Allowance for loan and lease losses, provision for loss, net of provision applied to unfunded commitments		2,974		3,040
Ending balance		54,859		54,859
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance		60,501		58,868
Loans charged off		(1,895)		(4,682)
Recovery of loans previously charged off		2,680		3,923
Net loans recovered (charged off)		785		(759)
Allowance for loan and lease losses, provision for loss, net of provision applied to unfunded commitments		5,055		8,232
Ending balance		66,341		66,341
Real-estate - home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance		19,215		18,911
Loans charged off		(206)		(425)
Recovery of loans previously charged off		223		420
Net loans recovered (charged off)		17		(5)
Allowance for loan and lease losses, provision for loss, net of provision applied to unfunded commitments		(251)		75
Ending balance		18,981		18,981
Real estate - residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance		19,146		18,921
Loans charged off		(134)		(789)
Recovery of loans previously charged off		211		343
Net loans recovered (charged off)		77		(446)
Allowance for loan and lease losses, provision for loss, net of provision applied to unfunded commitments		(331)		417
Ending balance		18,892		18,892
Real-estate - construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance		4,941		5,061
Loans charged off		(3)		(98)
Recovery of loans previously charged off		1,245		1,329
Net loans recovered (charged off)		1,242		1,231
Allowance for loan and lease losses, provision for loss, net of provision applied to unfunded commitments		(1,255)		(1,364)
Ending balance		4,928		4,928
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance		3,319		3,217
Loans charged off		(795)		(1,478)
Recovery of loans previously charged off		579		789
Net loans recovered (charged off)		(216)		(689)
Allowance for loan and lease losses, provision for loss, net of provision applied to unfunded commitments		260		835
Ending balance		3,363		3,363
Equipment lease financing, other and overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance		3,041		2,670
Loans charged off		(448)		(1,233)
Recovery of loans previously charged off		148		377
Net loans recovered (charged off)		(300)		(856)
Allowance for loan and lease losses, provision for loss, net of provision applied to unfunded commitments		128		1,055
Ending balance		$ 2,869		$ 2,869
Cumulative Effect, Period of Adoption, Adjustment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impact of adopting CECL					$ 0	58,348
Loans - Excluding OBS Credit Exposure [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	238,508		163,622
Impact of adopting CECL						45,723
Loans charged off	8,047		22,050
Recoveries of loans previously charged off	3,926		6,813
Current period net charge-offs	(4,121)		(15,237)
Provision for credit losses	22,150		62,429
Ending balance	256,537		256,537
Loans - Excluding OBS Credit Exposure [Member] | Real estate - commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	90,319		45,610
Impact of adopting CECL						29,361
Loans charged off	2,324		3,179
Recoveries of loans previously charged off	95		339
Current period net charge-offs	(2,229)		(2,840)
Provision for credit losses	14,605		30,564
Ending balance	102,695		102,695
Loans - Excluding OBS Credit Exposure [Member] | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	63,606		68,602
Impact of adopting CECL						(18,576)
Loans charged off	3,480		14,379
Recoveries of loans previously charged off	2,978		4,712
Current period net charge-offs	(502)		(9,667)
Provision for credit losses	(1,657)		21,088
Ending balance	61,447		61,447
Loans - Excluding OBS Credit Exposure [Member] | Real-estate - home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	15,253		17,744
Impact of adopting CECL						(65)
Loans charged off	458		745
Recoveries of loans previously charged off	44		261
Current period net charge-offs	(414)		(484)
Provision for credit losses	1,552		(804)
Ending balance	16,391		16,391
Loans - Excluding OBS Credit Exposure [Member] | Real estate - residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	42,427		19,771
Impact of adopting CECL						21,235
Loans charged off	235		422
Recoveries of loans previously charged off	112		197
Current period net charge-offs	(123)		(225)
Provision for credit losses	4,139		5,662
Ending balance	46,443		46,443
Loans - Excluding OBS Credit Exposure [Member] | Real-estate - construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	8,398		4,443
Impact of adopting CECL						4,015
Loans charged off	17		17
Recoveries of loans previously charged off	0		70
Current period net charge-offs	(17)		53
Provision for credit losses	3,933		3,803
Ending balance	12,314		12,314
Loans - Excluding OBS Credit Exposure [Member] | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	9,865		3,762
Impact of adopting CECL						5,969
Loans charged off	845		2,087
Recoveries of loans previously charged off	605		1,034
Current period net charge-offs	(240)		(1,053)
Provision for credit losses	674		1,621
Ending balance	10,299		10,299
Loans - Excluding OBS Credit Exposure [Member] | Equipment lease financing, other and overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	8,640		3,690
Impact of adopting CECL						$ 3,784
Loans charged off	688		1,221
Recoveries of loans previously charged off	92		200
Current period net charge-offs	(596)		(1,021)
Provision for credit losses	(1,096)		495
Ending balance	$ 6,948		$ 6,948

Loans and Allowance for Credi_7

Loans and Allowance for Credit Losses Summary of Allowance for Credit Losses and Net Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
ACL - Loans
Collectively Evaluated for Impairment				$ 128,352
Individually Evaluated for Impairment				41,881
Total ACL	$ 272,920	$ 257,471	$ 166,209	176,941	$ 170,372	$ 169,410
Net Loans
Collectively Evaluated for Impairment				16,174,128
Individually Evaluated for Impairment				194,330
Real estate - commercial mortgage
ACL - Loans
Collectively Evaluated for Impairment				45,367
Individually Evaluated for Impairment				9,492
Net Loans
Collectively Evaluated for Impairment				6,438,080
Individually Evaluated for Impairment				59,893
Commercial and industrial
ACL - Loans
Collectively Evaluated for Impairment				53,985
Individually Evaluated for Impairment				12,356
Net Loans
Collectively Evaluated for Impairment				4,313,666
Individually Evaluated for Impairment				51,582
Real-estate - home equity
ACL - Loans
Collectively Evaluated for Impairment				8,463
Individually Evaluated for Impairment				10,518
Net Loans
Collectively Evaluated for Impairment				1,363,392
Individually Evaluated for Impairment				23,582
Real estate - residential mortgage
ACL - Loans
Collectively Evaluated for Impairment				9,913
Individually Evaluated for Impairment				8,979
Net Loans
Collectively Evaluated for Impairment				2,414,627
Individually Evaluated for Impairment				37,339
Real-estate - construction
ACL - Loans
Collectively Evaluated for Impairment				4,399
Individually Evaluated for Impairment				529
Net Loans
Collectively Evaluated for Impairment				918,380
Individually Evaluated for Impairment				4,167
Consumer
ACL - Loans
Collectively Evaluated for Impairment				3,356
Individually Evaluated for Impairment				7
Net Loans
Collectively Evaluated for Impairment				452,865
Individually Evaluated for Impairment				9
Equipment lease financing, other and overdrafts
ACL - Loans
Collectively Evaluated for Impairment				2,869
Individually Evaluated for Impairment				0
Net Loans
Collectively Evaluated for Impairment				273,118
Individually Evaluated for Impairment				$ 17,758
Loans - Excluding OBS Credit Exposure [Member]
ACL - Loans
Collectively Evaluated for Impairment	226,751
Individually Evaluated for Impairment	29,786
Total ACL	256,537	238,508	163,622
Net Loans
Collectively Evaluated for Impairment	18,511,169
Individually Evaluated for Impairment	193,553
Total Net Loans	18,704,722
Loans - Excluding OBS Credit Exposure [Member] | Real estate - commercial mortgage
ACL - Loans
Collectively Evaluated for Impairment	94,654
Individually Evaluated for Impairment	8,041
Total ACL	102,695	90,319	45,610
Net Loans
Collectively Evaluated for Impairment	6,873,754
Individually Evaluated for Impairment	61,182
Total Net Loans	6,934,936
Loans - Excluding OBS Credit Exposure [Member] | Commercial and industrial
ACL - Loans
Collectively Evaluated for Impairment	54,413
Individually Evaluated for Impairment	7,034
Total ACL	61,447	63,606	68,602
Net Loans
Collectively Evaluated for Impairment	5,927,424
Individually Evaluated for Impairment	43,777
Total Net Loans	5,971,201
Loans - Excluding OBS Credit Exposure [Member] | Real-estate - home equity
ACL - Loans
Collectively Evaluated for Impairment	8,510
Individually Evaluated for Impairment	7,881
Total ACL	16,391	15,253	17,744
Net Loans
Collectively Evaluated for Impairment	1,228,411
Individually Evaluated for Impairment	23,044
Total Net Loans	1,251,455
Loans - Excluding OBS Credit Exposure [Member] | Real estate - residential mortgage
ACL - Loans
Collectively Evaluated for Impairment	39,984
Individually Evaluated for Impairment	6,459
Total ACL	46,443	42,427	19,771
Net Loans
Collectively Evaluated for Impairment	2,817,173
Individually Evaluated for Impairment	45,053
Total Net Loans	2,862,226
Loans - Excluding OBS Credit Exposure [Member] | Real-estate - construction
ACL - Loans
Collectively Evaluated for Impairment	12,060
Individually Evaluated for Impairment	254
Total ACL	12,314	8,398	4,443
Net Loans
Collectively Evaluated for Impairment	969,427
Individually Evaluated for Impairment	3,482
Total Net Loans	972,909
Loans - Excluding OBS Credit Exposure [Member] | Consumer
ACL - Loans
Collectively Evaluated for Impairment	10,182
Individually Evaluated for Impairment	117
Total ACL	10,299	9,865	3,762
Net Loans
Collectively Evaluated for Impairment	465,418
Individually Evaluated for Impairment	192
Total Net Loans	465,610
Loans - Excluding OBS Credit Exposure [Member] | Equipment lease financing, other and overdrafts
ACL - Loans
Collectively Evaluated for Impairment	6,948
Individually Evaluated for Impairment	0
Total ACL	6,948	$ 8,640	$ 3,690
Net Loans
Collectively Evaluated for Impairment	229,562
Individually Evaluated for Impairment	16,823
Total Net Loans	$ 246,385

Loans and Allowance for Credi_8

Loans and Allowance for Credit Losses Present Loans, Net of Unearned Income and Their Related Allowance for Loan Losses, by Portfolio Segment (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collectively evaluated for impairment			$ 128,352
Individually evaluated for impairment			41,881
Allowance for loan losses	$ 256,537	$ 163,622	170,233	$ 162,109	$ 160,537
Collectively evaluated for impairment			16,174,128
Individually evaluated for impairment			194,330
Net Loans	18,704,722	16,837,526	16,368,458
Real estate - commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collectively evaluated for impairment			45,367
Individually evaluated for impairment			9,492
Allowance for loan losses			54,859	51,946	52,889
Collectively evaluated for impairment			6,438,080
Individually evaluated for impairment			59,893
Net Loans	6,934,936	6,700,776	6,497,973
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collectively evaluated for impairment			53,985
Individually evaluated for impairment			12,356
Allowance for loan losses			66,341	60,501	58,868
Collectively evaluated for impairment			4,313,666
Individually evaluated for impairment			51,582
Net Loans	5,971,201	4,446,701	4,365,248
Real-estate - home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collectively evaluated for impairment			8,463
Individually evaluated for impairment			10,518
Allowance for loan losses			18,981	19,215	18,911
Collectively evaluated for impairment			1,363,392
Individually evaluated for impairment			23,582
Net Loans	1,251,455	1,314,944	1,386,974
Real estate - residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collectively evaluated for impairment			9,913
Individually evaluated for impairment			8,979
Allowance for loan losses			18,892	19,146	18,921
Collectively evaluated for impairment			2,414,627
Individually evaluated for impairment			37,339
Net Loans	2,862,226	2,641,465	2,451,966
Real-estate - construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collectively evaluated for impairment			4,399
Individually evaluated for impairment			529
Allowance for loan losses			4,928	4,941	5,061
Collectively evaluated for impairment			918,380
Individually evaluated for impairment			4,167
Net Loans	972,909	971,079	922,547
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collectively evaluated for impairment			3,356
Individually evaluated for impairment			7
Allowance for loan losses			3,363	3,319	3,217
Collectively evaluated for impairment			452,865
Individually evaluated for impairment			9
Net Loans	465,610	463,164	452,874
Equipment lease financing, other and overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collectively evaluated for impairment			2,869
Individually evaluated for impairment			0
Allowance for loan losses			2,869	$ 3,041	$ 2,670
Collectively evaluated for impairment			273,118
Individually evaluated for impairment			17,758
Net Loans	$ 246,385	$ 299,397	$ 290,876

Loans and Allowance for Credi_9

Loans and Allowance for Credit Losses Total Impaired Loans by Class Segments (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with no related allowance	$ 56,443
Unpaid principal balance, with related allowance	68,594
Unpaid Principal Balance	125,037	$ 125,098
Real estate - commercial mortgage
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with no related allowance	16,137
Unpaid principal balance, with related allowance	24,638
Unpaid Principal Balance	40,775	33,166
Commercial
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with no related allowance	21,157
Unpaid principal balance, with related allowance	18,222
Unpaid Principal Balance	39,379	48,106
Real estate - residential mortgage
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with no related allowance	1,256
Unpaid principal balance, with related allowance	15,634
Unpaid Principal Balance	16,890	16,676
Construction
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with no related allowance	1,070
Unpaid principal balance, with related allowance	2,412
Unpaid Principal Balance	3,482	3,618
Real-estate - home equity
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with no related allowance	0
Unpaid principal balance, with related allowance	7,688
Unpaid Principal Balance	7,688	7,004
Equipment lease financing, other and overdrafts
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with no related allowance	16,823
Unpaid principal balance, with related allowance	0
Unpaid Principal Balance	$ 16,823	$ 16,528

Loans and Allowance for Cred_10

Loans and Allowance for Credit Losses Credit Quality Indicators (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Total
Current period gross charge-offs	$ (8,047)	$ (22,050)
Current period recoveries	3,926	6,813
Current period net charge-offs	(4,121)	(15,237)
Gross loans	18,728,480	18,728,480	$ 16,864,336
Real-estate - home equity
Total
Gross loans	1,251,455	1,251,455	1,314,944
Real estate - residential mortgage
Total
Gross loans	2,862,226	2,862,226	2,641,465
Consumer
Total
Gross loans	465,610	465,610	463,164
Commercial and industrial
Total
Gross loans	5,971,201	5,971,201	4,446,701
Commercial and industrial | Pass
Total
Gross loans			4,065,834
Commercial and industrial | Special Mention
Total
Gross loans			181,107
Commercial and industrial | Substandard or Lower
Total
Gross loans			199,760
Real estate - commercial mortgage
Total
Gross loans	6,934,936	6,934,936	6,700,776
Real estate - commercial mortgage | Pass
Total
Gross loans			6,429,407
Real estate - commercial mortgage | Special Mention
Total
Gross loans			137,163
Real estate - commercial mortgage | Substandard or Lower
Total
Gross loans			134,206
Commercial
Total
Gross loans			4,198,173
Commercial | Pass
Total
Gross loans			3,830,847
Commercial | Special Mention
Total
Gross loans			171,442
Commercial | Substandard or Lower
Total
Gross loans			195,884
Commercial - unsecured
Total
Gross loans			248,528
Commercial - unsecured | Pass
Total
Gross loans			234,987
Commercial - unsecured | Special Mention
Total
Gross loans			9,665
Commercial - unsecured | Substandard or Lower
Total
Gross loans			3,876
Construction
Total
Gross loans			107,166
Construction | Pass
Total
Gross loans			100,808
Construction | Special Mention
Total
Gross loans			2,897
Construction | Substandard or Lower
Total
Gross loans			3,461
Construction - commercial
Total
Gross loans			769,560
Construction - commercial | Pass
Total
Gross loans			765,562
Construction - commercial | Special Mention
Total
Gross loans			1,322
Construction - commercial | Substandard or Lower
Total
Gross loans			2,676
Total construction (excluding construction - other)
Total
Gross loans			876,726
Total construction (excluding construction - other) | Pass
Total
Gross loans			866,370
Total construction (excluding construction - other) | Special Mention
Total
Gross loans			4,219
Total construction (excluding construction - other) | Substandard or Lower
Total
Gross loans			6,137
Commercial Loans, Commerical Mortgages, Constructions Loans
Total
Gross loans			$ 12,024,203
Percentage of total loans rated			100.00%
Commercial Loans, Commerical Mortgages, Constructions Loans | Pass
Total
Gross loans			$ 11,361,611
Percentage of total loans rated			94.50%
Commercial Loans, Commerical Mortgages, Constructions Loans | Special Mention
Total
Gross loans			$ 322,489
Percentage of total loans rated			2.70%
Commercial Loans, Commerical Mortgages, Constructions Loans | Substandard or Lower
Total
Gross loans			$ 340,103
Percentage of total loans rated			2.80%
Payment Activity, Aging Status [Member]
2020
Total	712,711	712,711
2019
Total	926,960	926,960
2018
Total	506,899	506,899
2017
Total	565,002	565,002
2016
Total	383,271	383,271
Prior
Total	764,601	764,601
Revolving Loans Amortized Cost Basis
Total	1,083,806	1,083,806
Total
Total	4,952,093	4,952,093
Gross loans			$ 4,813,323
Percentage of total loans rated			100.00%
Payment Activity, Aging Status [Member] | Performing
2020
Total	711,185	711,185
2019
Total	926,325	926,325
2018
Total	503,819	503,819
2017
Total	546,009	546,009
2016
Total	382,315	382,315
Prior
Total	744,713	744,713
Revolving Loans Amortized Cost Basis
Total	1,075,394	1,075,394
Total
Total	4,898,188	4,898,188
Gross loans			$ 4,705,746
Percentage of total loans rated			97.80%
Payment Activity, Aging Status [Member] | Delinquent
Total
Gross loans			$ 56,689
Percentage of total loans rated			1.20%
Payment Activity, Aging Status [Member] | Non-performing
2020
Total	1,526	1,526
2019
Total	635	635
2018
Total	3,080	3,080
2017
Total	18,993	18,993
2016
Total	956	956
Prior
Total	19,888	19,888
Revolving Loans Amortized Cost Basis
Total	8,412	8,412
Total
Total	53,905	53,905
Gross loans			$ 50,888
Percentage of total loans rated			1.00%
Payment Activity, Aging Status [Member] | Real-estate - home equity
2020
Total	13,718	13,718
Current period gross charge-offs		0
Current period recoveries		0
Current period net charge-offs		0
2019
Total	9,591	9,591
Current period gross charge-offs		0
Current period recoveries		0
Current period net charge-offs		0
2018
Total	15,617	15,617
Current period gross charge-offs		0
Current period recoveries		0
Current period net charge-offs		0
2017
Total	13,937	13,937
Current period gross charge-offs		(117)
Current period recoveries		0
Current period net charge-offs		(117)
2016
Total	15,234	15,234
Current period gross charge-offs		(23)
Current period recoveries		0
Current period net charge-offs		(23)
Prior
Total	148,058	148,058
Current period gross charge-offs		(231)
Current period recoveries		219
Current period net charge-offs		(12)
Revolving Loans Amortized Cost Basis
Total	1,027,130	1,027,130
Current period gross charge-offs		(374)
Current period recoveries		42
Current period net charge-offs		(332)
Total
Total	1,251,455	1,251,455
Current period gross charge-offs		(745)
Current period recoveries		261
Current period net charge-offs		(484)
Gross loans			$ 1,314,944
Payment Activity, Aging Status [Member] | Real-estate - home equity | Performing
2020
Total	13,718	13,718
2019
Total	9,591	9,591
2018
Total	15,464	15,464
2017
Total	13,681	13,681
2016
Total	15,006	15,006
Prior
Total	145,384	145,384
Revolving Loans Amortized Cost Basis
Total	1,018,865	1,018,865
Total
Total	1,239,464	1,239,464
Gross loans			1,292,035
Payment Activity, Aging Status [Member] | Real-estate - home equity | Delinquent
Total
Gross loans			12,341
Payment Activity, Aging Status [Member] | Real-estate - home equity | Non-performing
2020
Total	0	0
2019
Total	0	0
2018
Total	153	153
2017
Total	256	256
2016
Total	228	228
Prior
Total	2,674	2,674
Revolving Loans Amortized Cost Basis
Total	8,265	8,265
Total
Total	11,991	11,991
Gross loans			10,568
Payment Activity, Aging Status [Member] | Real estate - residential mortgage
2020
Total	554,061	554,061
Current period gross charge-offs		0
Current period recoveries		0
Current period net charge-offs		0
2019
Total	661,609	661,609
Current period gross charge-offs		(15)
Current period recoveries		0
Current period net charge-offs		(15)
2018
Total	314,451	314,451
Current period gross charge-offs		(100)
Current period recoveries		10
Current period net charge-offs		(90)
2017
Total	441,250	441,250
Current period gross charge-offs		(104)
Current period recoveries		1
Current period net charge-offs		(103)
2016
Total	320,532	320,532
Current period gross charge-offs		(6)
Current period recoveries		1
Current period net charge-offs		(5)
Prior
Total	570,324	570,324
Current period gross charge-offs		(197)
Current period recoveries		185
Current period net charge-offs		(12)
Revolving Loans Amortized Cost Basis
Total	0	0
Current period gross charge-offs		0
Current period recoveries		0
Current period net charge-offs		0
Total
Total	2,862,227	2,862,227
Current period gross charge-offs		(422)
Current period recoveries		197
Current period net charge-offs		(225)
Gross loans			2,641,465
Payment Activity, Aging Status [Member] | Real estate - residential mortgage | Performing
2020
Total	554,061	554,061
2019
Total	660,974	660,974
2018
Total	311,804	311,804
2017
Total	438,785	438,785
2016
Total	320,134	320,134
Prior
Total	553,448	553,448
Revolving Loans Amortized Cost Basis
Total	0	0
Total
Total	2,839,206	2,839,206
Gross loans			2,584,763
Payment Activity, Aging Status [Member] | Real estate - residential mortgage | Delinquent
Total
Gross loans			34,291
Payment Activity, Aging Status [Member] | Real estate - residential mortgage | Non-performing
2020
Total	0	0
2019
Total	635	635
2018
Total	2,647	2,647
2017
Total	2,465	2,465
2016
Total	398	398
Prior
Total	16,876	16,876
Revolving Loans Amortized Cost Basis
Total	0	0
Total
Total	23,021	23,021
Gross loans			22,411
Payment Activity, Aging Status [Member] | Consumer
2020
Total	58,202	58,202
Current period gross charge-offs		0
Current period recoveries		83
Current period net charge-offs		83
2019
Total	115,866	115,866
Current period gross charge-offs		(532)
Current period recoveries		89
Current period net charge-offs		(443)
2018
Total	115,780	115,780
Current period gross charge-offs		(335)
Current period recoveries		143
Current period net charge-offs		(192)
2017
Total	54,150	54,150
Current period gross charge-offs		(326)
Current period recoveries		51
Current period net charge-offs		(275)
2016
Total	31,058	31,058
Current period gross charge-offs		(303)
Current period recoveries		43
Current period net charge-offs		(260)
Prior
Total	43,386	43,386
Current period gross charge-offs		(591)
Current period recoveries		625
Current period net charge-offs		34
Revolving Loans Amortized Cost Basis
Total	47,168	47,168
Current period gross charge-offs		0
Current period recoveries		0
Current period net charge-offs		0
Total
Total	465,610	465,610
Current period gross charge-offs		(2,087)
Current period recoveries		1,034
Current period net charge-offs		(1,053)
Gross loans			463,164
Payment Activity, Aging Status [Member] | Consumer | Performing
2020
Total	58,202	58,202
2019
Total	115,866	115,866
2018
Total	115,707	115,707
2017
Total	54,108	54,108
2016
Total	31,027	31,027
Prior
Total	43,344	43,344
Revolving Loans Amortized Cost Basis
Total	47,021	47,021
Total
Total	465,275	465,275
Gross loans			457,556
Payment Activity, Aging Status [Member] | Consumer | Delinquent
Total
Gross loans			5,150
Payment Activity, Aging Status [Member] | Consumer | Non-performing
2020
Total	0	0
2019
Total	0	0
2018
Total	73	73
2017
Total	42	42
2016
Total	31	31
Prior
Total	42	42
Revolving Loans Amortized Cost Basis
Total	147	147
Total
Total	335	335
Gross loans			458
Payment Activity, Aging Status [Member] | Equipment lease financing, other and overdrafts
2020
Total	64,679	64,679
Current period gross charge-offs		(228)
Current period recoveries		61
Current period net charge-offs		(167)
2019
Total	76,157	76,157
Current period gross charge-offs		(460)
Current period recoveries		39
Current period net charge-offs		(421)
2018
Total	54,560	54,560
Current period gross charge-offs		0
Current period recoveries		0
Current period net charge-offs		0
2017
Total	55,483	55,483
Current period gross charge-offs		(95)
Current period recoveries		66
Current period net charge-offs		(29)
2016
Total	16,431	16,431
Current period gross charge-offs		0
Current period recoveries		2
Current period net charge-offs		2
Prior
Total	2,833	2,833
Current period gross charge-offs		(438)
Current period recoveries		32
Current period net charge-offs		(406)
Revolving Loans Amortized Cost Basis
Total	0	0
Current period gross charge-offs		0
Current period recoveries		0
Current period net charge-offs		0
Total
Total	270,143	270,143
Current period gross charge-offs		(1,221)
Current period recoveries		200
Current period net charge-offs		(1,021)
Gross loans			299,397
Payment Activity, Aging Status [Member] | Equipment lease financing, other and overdrafts | Performing
2020
Total	63,153	63,153
2019
Total	76,157	76,157
2018
Total	54,353	54,353
2017
Total	39,435	39,435
2016
Total	16,132	16,132
Prior
Total	2,537	2,537
Total
Total	251,767	251,767
Gross loans			278,743
Payment Activity, Aging Status [Member] | Equipment lease financing, other and overdrafts | Delinquent
Total
Gross loans			4,012
Payment Activity, Aging Status [Member] | Equipment lease financing, other and overdrafts | Non-performing
2020
Total	1,526	1,526
2019
Total	0	0
2018
Total	207	207
2017
Total	16,048	16,048
2016
Total	299	299
Prior
Total	296	296
Total
Total	18,376	18,376
Gross loans			16,642
Payment Activity, Aging Status [Member] | Construction - other
2020
Total	22,051	22,051
Current period gross charge-offs		0
Current period recoveries		0
Current period net charge-offs		0
2019
Total	63,737	63,737
Current period gross charge-offs		0
Current period recoveries		0
Current period net charge-offs		0
2018
Total	6,491	6,491
Current period gross charge-offs		0
Current period recoveries		0
Current period net charge-offs		0
2017
Total	182	182
Current period gross charge-offs		0
Current period recoveries		0
Current period net charge-offs		0
2016
Total	16	16
Current period gross charge-offs		0
Current period recoveries		0
Current period net charge-offs		0
Prior
Total	0	0
Current period gross charge-offs		0
Current period recoveries		0
Current period net charge-offs		0
Revolving Loans Amortized Cost Basis
Total	9,508	9,508
Current period gross charge-offs		0
Current period recoveries		0
Current period net charge-offs		0
Total
Total	102,658	102,658
Current period gross charge-offs		0
Current period recoveries		0
Current period net charge-offs		0
Gross loans			94,353
Payment Activity, Aging Status [Member] | Construction - other | Performing
2020
Total	22,051	22,051
2019
Total	63,737	63,737
2018
Total	6,491	6,491
2017
Total	0	0
2016
Total	16	16
Prior
Total	0	0
Revolving Loans Amortized Cost Basis
Total	9,508	9,508
Total
Total	102,476	102,476
Gross loans			92,649
Payment Activity, Aging Status [Member] | Construction - other | Delinquent
Total
Gross loans			895
Payment Activity, Aging Status [Member] | Construction - other | Non-performing
2020
Total	0	0
2019
Total	0	0
2018
Total	0	0
2017
Total	182	182
2016
Total	0	0
Prior
Total	0	0
Revolving Loans Amortized Cost Basis
Total	0	0
Total
Total	182	182
Gross loans			809
Payment Activity, Aging Status [Member] | Consumer
Total
Gross loans			64,237
Payment Activity, Aging Status [Member] | Consumer | Performing
Total
Gross loans			63,582
Payment Activity, Aging Status [Member] | Consumer | Delinquent
Total
Gross loans			465
Payment Activity, Aging Status [Member] | Consumer | Non-performing
Total
Gross loans			190
Payment Activity, Aging Status [Member] | Consumer - indirect
Total
Gross loans			398,927
Payment Activity, Aging Status [Member] | Consumer - indirect | Performing
Total
Gross loans			393,974
Payment Activity, Aging Status [Member] | Consumer - indirect | Delinquent
Total
Gross loans			4,685
Payment Activity, Aging Status [Member] | Consumer - indirect | Non-performing
Total
Gross loans			$ 268
Portfolio Segment and Loan Class [Member]
2020
Total	2,887,043	2,887,043
2019
Total	1,742,615	1,742,615
2018
Total	1,409,508	1,409,508
2017
Total	1,375,101	1,375,101
2016
Total	1,253,391	1,253,391
Prior
Total	3,548,900	3,548,900
Revolving Loans Amortized Cost Basis
Total	1,549,223	1,549,223
Total
Total	13,776,385	13,776,385
Portfolio Segment and Loan Class [Member] | Pass
2020
Total	2,804,144	2,804,144
2019
Total	1,725,526	1,725,526
2018
Total	1,358,670	1,358,670
2017
Total	1,293,015	1,293,015
2016
Total	1,198,608	1,198,608
Prior
Total	3,306,142	3,306,142
Revolving Loans Amortized Cost Basis
Total	1,415,651	1,415,651
Total
Total	13,110,980	13,110,980
Portfolio Segment and Loan Class [Member] | Special Mention
2020
Total	52,713	52,713
2019
Total	15,271	15,271
2018
Total	29,092	29,092
2017
Total	38,946	38,946
2016
Total	31,823	31,823
Prior
Total	141,203	141,203
Revolving Loans Amortized Cost Basis
Total	63,379	63,379
Total
Total	373,295	373,295
Portfolio Segment and Loan Class [Member] | Substandard or Lower
2020
Total	30,186	30,186
2019
Total	1,818	1,818
2018
Total	21,746	21,746
2017
Total	43,140	43,140
2016
Total	22,960	22,960
Prior
Total	101,555	101,555
Revolving Loans Amortized Cost Basis
Total	70,193	70,193
Total
Total	292,110	292,110
Portfolio Segment and Loan Class [Member] | Real estate - construction
2020
Total	57,915	57,915
Current period gross charge-offs		0
Current period recoveries		0
Current period net charge-offs		0
2019
Total	230,589	230,589
Current period gross charge-offs		0
Current period recoveries		0
Current period net charge-offs		0
2018
Total	204,748	204,748
Current period gross charge-offs		0
Current period recoveries		0
Current period net charge-offs		0
2017
Total	140,877	140,877
Current period gross charge-offs		0
Current period recoveries		0
Current period net charge-offs		0
2016
Total	51,655	51,655
Current period gross charge-offs		0
Current period recoveries		0
Current period net charge-offs		0
Prior
Total	134,423	134,423
Current period gross charge-offs		(17)
Current period recoveries		70
Current period net charge-offs		53
Revolving Loans Amortized Cost Basis
Total	50,043	50,043
Current period gross charge-offs		0
Current period recoveries		0
Current period net charge-offs		0
Total
Total	870,250	870,250
Current period gross charge-offs		(17)
Current period recoveries		70
Current period net charge-offs		53
Portfolio Segment and Loan Class [Member] | Real estate - construction | Pass
2020
Total	57,915	57,915
2019
Total	229,899	229,899
2018
Total	204,748	204,748
2017
Total	140,877	140,877
2016
Total	50,094	50,094
Prior
Total	126,187	126,187
Revolving Loans Amortized Cost Basis
Total	48,947	48,947
Total
Total	858,667	858,667
Portfolio Segment and Loan Class [Member] | Real estate - construction | Special Mention
2020
Total	0	0
2019
Total	534	534
2018
Total	0	0
2017
Total	0	0
2016
Total	783	783
Prior
Total	2,635	2,635
Revolving Loans Amortized Cost Basis
Total	336	336
Total
Total	4,288	4,288
Portfolio Segment and Loan Class [Member] | Real estate - construction | Substandard or Lower
2020
Total	0	0
2019
Total	156	156
2018
Total	0	0
2017
Total	0	0
2016
Total	778	778
Prior
Total	5,601	5,601
Revolving Loans Amortized Cost Basis
Total	760	760
Total
Total	7,295	7,295
Portfolio Segment and Loan Class [Member] | Commercial and industrial
2020
Total	2,369,113	2,369,113
Current period gross charge-offs		0
Current period recoveries
Current period net charge-offs		0
2019
Total	570,839	570,839
Current period gross charge-offs		(107)
Current period recoveries		39
Current period net charge-offs		(68)
2018
Total	387,016	387,016
Current period gross charge-offs		(9)
Current period recoveries		242
Current period net charge-offs		233
2017
Total	280,748	280,748
Current period gross charge-offs		(55)
Current period recoveries		63
Current period net charge-offs		8
2016
Total	257,730	257,730
Current period gross charge-offs		(334)
Current period recoveries		43
Current period net charge-offs		(291)
Prior
Total	687,587	687,587
Current period gross charge-offs		(210)
Current period recoveries		1,673
Current period net charge-offs		1,463
Revolving Loans Amortized Cost Basis
Total	1,413,375	1,413,375
Current period gross charge-offs		(13,664)
Current period recoveries		2,652
Current period net charge-offs		(11,012)
Total
Total	5,971,200	5,971,200
Current period gross charge-offs		(14,379)
Current period recoveries		4,712
Current period net charge-offs		(9,667)
Portfolio Segment and Loan Class [Member] | Commercial and industrial | Pass
2020
Total	2,286,984	2,286,984
2019
Total	559,728	559,728
2018
Total	362,758	362,758
2017
Total	257,780	257,780
2016
Total	230,120	230,120
Prior
Total	625,302	625,302
Revolving Loans Amortized Cost Basis
Total	1,285,256	1,285,256
Total
Total	5,611,340	5,611,340
Portfolio Segment and Loan Class [Member] | Commercial and industrial | Special Mention
2020
Total	51,958	51,958
2019
Total	9,918	9,918
2018
Total	10,905	10,905
2017
Total	8,782	8,782
2016
Total	14,898	14,898
Prior
Total	37,112	37,112
Revolving Loans Amortized Cost Basis
Total	59,836	59,836
Total
Total	194,277	194,277
Portfolio Segment and Loan Class [Member] | Commercial and industrial | Substandard or Lower
2020
Total	30,171	30,171
2019
Total	1,193	1,193
2018
Total	13,353	13,353
2017
Total	14,186	14,186
2016
Total	12,712	12,712
Prior
Total	25,173	25,173
Revolving Loans Amortized Cost Basis
Total	68,283	68,283
Total
Total	165,583	165,583
Portfolio Segment and Loan Class [Member] | Real estate - commercial mortgage
2020
Total	460,015	460,015
Current period gross charge-offs		0
Current period recoveries		0
Current period net charge-offs		0
2019
Total	941,187	941,187
Current period gross charge-offs		(10)
Current period recoveries		0
Current period net charge-offs		(10)
2018
Total	817,744	817,744
Current period gross charge-offs		(16)
Current period recoveries		0
Current period net charge-offs		(16)
2017
Total	953,476	953,476
Current period gross charge-offs		(1,993)
Current period recoveries		0
Current period net charge-offs		(1,993)
2016
Total	944,006	944,006
Current period gross charge-offs		(11)
Current period recoveries		1
Current period net charge-offs		(10)
Prior
Total	2,726,890	2,726,890
Current period gross charge-offs		(1,132)
Current period recoveries		338
Current period net charge-offs		(794)
Revolving Loans Amortized Cost Basis
Total	85,805	85,805
Current period gross charge-offs		(17)
Current period recoveries		0
Current period net charge-offs		(17)
Total
Total	6,934,935	6,934,935
Current period gross charge-offs		(3,179)
Current period recoveries		339
Current period net charge-offs		(2,840)
Portfolio Segment and Loan Class [Member] | Real estate - commercial mortgage | Pass
2020
Total	459,245	459,245
2019
Total	935,899	935,899
2018
Total	791,164	791,164
2017
Total	894,358	894,358
2016
Total	918,394	918,394
Prior
Total	2,554,653	2,554,653
Revolving Loans Amortized Cost Basis
Total	81,448	81,448
Total
Total	6,640,973	6,640,973
Portfolio Segment and Loan Class [Member] | Real estate - commercial mortgage | Special Mention
2020
Total	755	755
2019
Total	4,819	4,819
2018
Total	18,187	18,187
2017
Total	30,164	30,164
2016
Total	16,142	16,142
Prior
Total	101,456	101,456
Revolving Loans Amortized Cost Basis
Total	3,207	3,207
Total
Total	174,730	174,730
Portfolio Segment and Loan Class [Member] | Real estate - commercial mortgage | Substandard or Lower
2020
Total	15	15
2019
Total	469	469
2018
Total	8,393	8,393
2017
Total	28,954	28,954
2016
Total	9,470	9,470
Prior
Total	70,781	70,781
Revolving Loans Amortized Cost Basis
Total	1,150	1,150
Total
Total	119,232	119,232
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member]
Revolving Loans Amortized Cost Basis
Total	8,843	8,843
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Performing
Revolving Loans Amortized Cost Basis
Total	8,428	8,428
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Non-performing
Revolving Loans Amortized Cost Basis
Total	415	415
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Real-estate - home equity
Revolving Loans Amortized Cost Basis
Total	8,170	8,170
Current period gross charge-offs		0
Current period recoveries		0
Current period net charge-offs		0
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Real-estate - home equity | Performing
Revolving Loans Amortized Cost Basis
Total	7,755	7,755
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Real-estate - home equity | Non-performing
Revolving Loans Amortized Cost Basis
Total	415	415
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Real estate - residential mortgage
Revolving Loans Amortized Cost Basis
Total	0	0
Current period gross charge-offs		0
Current period recoveries		0
Current period net charge-offs		0
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Real estate - residential mortgage | Performing
Revolving Loans Amortized Cost Basis
Total	0	0
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Real estate - residential mortgage | Non-performing
Revolving Loans Amortized Cost Basis
Total	0	0
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Consumer
Revolving Loans Amortized Cost Basis
Total	0	0
Current period gross charge-offs		0
Current period recoveries		0
Current period net charge-offs		0
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Consumer | Performing
Revolving Loans Amortized Cost Basis
Total	0	0
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Consumer | Non-performing
Revolving Loans Amortized Cost Basis
Total	0	0
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Equipment lease financing, other and overdrafts
Revolving Loans Amortized Cost Basis
Total	0	0
Current period gross charge-offs		0
Current period recoveries		0
Current period net charge-offs		0
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Equipment lease financing, other and overdrafts | Performing
Revolving Loans Amortized Cost Basis
Total	0	0
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Equipment lease financing, other and overdrafts | Non-performing
Revolving Loans Amortized Cost Basis
Total	0	0
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Construction - other
Revolving Loans Amortized Cost Basis
Total	673	673
Current period gross charge-offs		0
Current period recoveries		0
Current period net charge-offs		0
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Construction - other | Performing
Revolving Loans Amortized Cost Basis
Total	673	673
Conversion to Term Loan [Member] | Payment Activity, Aging Status [Member] | Construction - other | Non-performing
Revolving Loans Amortized Cost Basis
Total	0	0
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member]
Revolving Loans Amortized Cost Basis
Total	10,604	10,604
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member] | Pass
Revolving Loans Amortized Cost Basis
Total	9,224	9,224
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member] | Special Mention
Revolving Loans Amortized Cost Basis
Total	868	868
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member] | Substandard or Lower
Revolving Loans Amortized Cost Basis
Total	512	512
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member] | Real estate - construction
Revolving Loans Amortized Cost Basis
Total	0	0
Current period gross charge-offs		0
Current period recoveries		0
Current period net charge-offs		0
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member] | Real estate - construction | Pass
Revolving Loans Amortized Cost Basis
Total	0	0
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member] | Real estate - construction | Special Mention
Revolving Loans Amortized Cost Basis
Total	0	0
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member] | Real estate - construction | Substandard or Lower
Revolving Loans Amortized Cost Basis
Total	0	0
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member] | Commercial and industrial
Revolving Loans Amortized Cost Basis
Total	4,792	4,792
Current period gross charge-offs		0
Current period recoveries		0
Current period net charge-offs		0
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member] | Commercial and industrial | Pass
Revolving Loans Amortized Cost Basis
Total	3,412	3,412
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member] | Commercial and industrial | Special Mention
Revolving Loans Amortized Cost Basis
Total	868	868
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member] | Commercial and industrial | Substandard or Lower
Revolving Loans Amortized Cost Basis
Total	512	512
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member] | Real estate - commercial mortgage
Revolving Loans Amortized Cost Basis
Total	5,812	5,812
Current period gross charge-offs		0
Current period recoveries		0
Current period net charge-offs		0
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member] | Real estate - commercial mortgage | Pass
Revolving Loans Amortized Cost Basis
Total	5,812	5,812
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member] | Real estate - commercial mortgage | Special Mention
Revolving Loans Amortized Cost Basis
Total	0	0
Conversion to Term Loan [Member] | Portfolio Segment and Loan Class [Member] | Real estate - commercial mortgage | Substandard or Lower
Revolving Loans Amortized Cost Basis
Total	$ 0	$ 0

Loans and Allowance for Cred_11

Loans and Allowance for Credit Losses Summary of Delinquency and Non-Performing Status by Portfolio Segment (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019
Financing Receivable, Impaired [Line Items]
Loans	$ 18,704,722	$ 16,837,526	$ 16,368,458
Real-estate - home equity
Financing Receivable, Impaired [Line Items]
Loans	1,251,455	1,314,944	1,386,974
Real estate - residential mortgage
Financing Receivable, Impaired [Line Items]
Loans	2,862,226	2,641,465	2,451,966
Consumer
Financing Receivable, Impaired [Line Items]
Loans	465,610	463,164	452,874
Equipment lease financing, other and overdrafts
Financing Receivable, Impaired [Line Items]
Loans	$ 246,385	$ 299,397	$ 290,876

Loans and Allowance for Cred_12

Loans and Allowance for Credit Losses Non-Performing Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Receivables [Abstract]
Non-accrual loans and leases	$ 125,037	$ 125,098
Loans and leases 90 days or more past due and still accruing	14,767	16,057
Total non-performing loans and leases	139,804	141,155
Other real estate owned (OREO)	5,418	6,831
Total non-performing assets	145,222	$ 147,986
Mortgage Loans in Process of Foreclosure, Amount	$ 10,600

Loans and Allowance for Cred_13

Loans and Allowance for Credit Losses Past Due Loan Status and Non-Accrual Loans by Portfolio Segment (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019
Financing Receivable, Past Due [Line Items]
≥ 90 Days Past Due and Accruing	$ 14,767	$ 16,057
Non- accrual	125,037	125,098
Current	18,514,573	16,620,575
Net Loans	18,704,722	16,837,526	$ 16,368,458
Financial Asset, 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due and Non-accrual	39,485	56,326
Financial Asset, 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due and Non-accrual	10,860	19,470
Real estate - commercial mortgage
Financing Receivable, Past Due [Line Items]
≥ 90 Days Past Due and Accruing	1,599	4,113
Non- accrual	40,775	33,166
Current	6,874,941	6,651,042
Net Loans	6,934,936	6,700,776	6,497,973
Real estate - commercial mortgage | Financial Asset, 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due and Non-accrual	16,431	10,912
Real estate - commercial mortgage | Financial Asset, 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due and Non-accrual	1,190	1,543
Commercial and industrial
Financing Receivable, Past Due [Line Items]
≥ 90 Days Past Due and Accruing	351	1,385
Non- accrual	39,379	48,106
Current	5,927,286	4,392,278
Net Loans	5,971,201	4,446,701	4,365,248
Commercial and industrial | Financial Asset, 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due and Non-accrual	2,970	2,302
Commercial and industrial | Financial Asset, 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due and Non-accrual	1,215	2,630
Real-estate - home equity
Financing Receivable, Past Due [Line Items]
≥ 90 Days Past Due and Accruing	3,889	3,564
Non- accrual	7,688	7,004
Current	1,234,854	1,292,035
Net Loans	1,251,455	1,314,944	1,386,974
Real-estate - home equity | Financial Asset, 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due and Non-accrual	3,431	9,635
Real-estate - home equity | Financial Asset, 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due and Non-accrual	1,593	2,706
Real estate - residential mortgage
Financing Receivable, Past Due [Line Items]
≥ 90 Days Past Due and Accruing	5,997	5,735
Non- accrual	16,890	16,676
Current	2,822,177	2,584,763
Net Loans	2,862,226	2,641,465	2,451,966
Real estate - residential mortgage | Financial Asset, 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due and Non-accrual	11,401	26,982
Real estate - residential mortgage | Financial Asset, 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due and Non-accrual	5,761	7,309
Real-estate - construction
Financing Receivable, Past Due [Line Items]
≥ 90 Days Past Due and Accruing	1,043	688
Non- accrual	3,482	3,618
Current	965,364	964,158
Net Loans	972,909	971,079	922,547
Real-estate - construction | Financial Asset, 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due and Non-accrual	2,606	1,715
Real-estate - construction | Financial Asset, 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due and Non-accrual	414	900
Consumer
Financing Receivable, Past Due [Line Items]
≥ 90 Days Past Due and Accruing	334	458
Non- accrual	0	0
Current	462,954	457,556
Net Loans	465,610	463,164	452,874
Consumer | Financial Asset, 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due and Non-accrual	1,851	4,228
Consumer | Financial Asset, 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due and Non-accrual	471	922
Equipment lease financing, other and overdrafts
Financing Receivable, Past Due [Line Items]
≥ 90 Days Past Due and Accruing	1,554	114
Non- accrual	16,823	16,528
Current	226,997	278,743
Net Loans	246,385	299,397	$ 290,876
Equipment lease financing, other and overdrafts | Financial Asset, 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due and Non-accrual	795	552
Equipment lease financing, other and overdrafts | Financial Asset, 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due and Non-accrual	$ 216	$ 3,460

Loans and Allowance for Cred_14

Loans and Allowance for Credit Losses Loans Modified Under Troubled Debt Restructurings (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total Accruing Troubled Debt Restructurings	$ 68,383	$ 55,150
Non-accrual TDRs (1)	31,575	20,825
Total TDRs	99,958	75,975
Loans and leases 90 days or more past due and still accruing	14,767	16,057
Financing Receivable, Nonaccrual	125,037	125,098
Financing Receivable, Not Past Due	18,514,573	16,620,575
Loans and Leases Receivable, Net of Deferred Income	18,704,722	16,837,526	$ 16,368,458
Real estate - commercial mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans and leases 90 days or more past due and still accruing	1,599	4,113
Financing Receivable, Nonaccrual	40,775	33,166
Financing Receivable, Not Past Due	6,874,941	6,651,042
Loans and Leases Receivable, Net of Deferred Income	6,934,936	6,700,776	6,497,973
Residential Mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total Accruing Troubled Debt Restructurings	28,030	21,551
Commercial Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total Accruing Troubled Debt Restructurings	20,407	13,330
Real-estate - home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total Accruing Troubled Debt Restructurings	15,548	15,068
Loans and leases 90 days or more past due and still accruing	3,889	3,564
Financing Receivable, Nonaccrual	7,688	7,004
Financing Receivable, Not Past Due	1,234,854	1,292,035
Loans and Leases Receivable, Net of Deferred Income	1,251,455	1,314,944	$ 1,386,974
Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total Accruing Troubled Debt Restructurings	4,398	5,193
Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total Accruing Troubled Debt Restructurings	0	8
Financial Asset, 30 to 59 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Past Due	39,485	56,326
Financial Asset, 30 to 59 Days Past Due | Real estate - commercial mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Past Due	16,431	10,912
Financial Asset, 30 to 59 Days Past Due | Real-estate - home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Past Due	3,431	9,635
Financial Asset, 60 to 89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Past Due	10,860	19,470
Financial Asset, 60 to 89 Days Past Due | Real estate - commercial mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Past Due	1,190	1,543
Financial Asset, 60 to 89 Days Past Due | Real-estate - home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Past Due	$ 1,593	$ 2,706

Loans and Allowance for Cred_15

Loans and Allowance for Credit Losses Troubled Debt Restructuring Modification (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020USD ($)loans	Jun. 30, 2019USD ($)loans	Jun. 30, 2020USD ($)loans	Jun. 30, 2019USD ($)loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loans	79	29	96	49
Post-Modification Recorded Investment | $	$ 27,685	$ 4,012	$ 29,388	$ 8,218
Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loans	13	4	14	8
Post-Modification Recorded Investment | $	$ 1,304	$ 586	$ 1,378	$ 3,046
Real estate - commercial mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loans	6	2	7	2
Post-Modification Recorded Investment | $	$ 16,082	$ 1,785	$ 16,474	$ 1,785
Real-estate - home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loans	19	22	27	34
Post-Modification Recorded Investment | $	$ 1,609	$ 1,125	$ 2,186	$ 1,954
Real estate - residential mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loans	33	1	40	5
Post-Modification Recorded Investment | $	$ 8,505	$ 516	$ 9,165	$ 1,433
Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loans	8	0	8	0
Post-Modification Recorded Investment | $	$ 185	$ 0	$ 185	$ 0

Loans and Allowance for Cred_16

Loans and Allowance for Credit Losses TDRs by Class Segment (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020USD ($)loans	Jun. 30, 2019USD ($)loans	Jun. 30, 2020USD ($)loans	Jun. 30, 2019USD ($)loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Recorded Investment | $	$ 27,685	$ 4,012	$ 29,388	$ 8,218
Number of Loans | loans	79	29	96	49
Real estate - residential mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Recorded Investment | $	$ 8,505	$ 516	$ 9,165	$ 1,433
Number of Loans | loans	33	1	40	5
Real estate - commercial mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Recorded Investment | $	$ 16,082	$ 1,785	$ 16,474	$ 1,785
Number of Loans | loans	6	2	7	2
Real-estate - home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Recorded Investment | $	$ 1,609	$ 1,125	$ 2,186	$ 1,954
Number of Loans | loans	19	22	27	34
Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Recorded Investment | $	$ 1,304	$ 586	$ 1,378	$ 3,046
Number of Loans | loans	13	4	14	8
Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Recorded Investment | $	$ 185	$ 0	$ 185	$ 0
Number of Loans | loans	8	0	8	0

Loans and Allowance for Cred_17

Loans and Allowance for Credit Losses Narrative (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired loans with principal balances approximately in percentage	97.00%	93.00%
Unpaid principal balance, with no related allowance	$ 56,443
Excluded from TDRs	3,900,000
Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Minimum balance of loans evaluated individually for impairment	1,000
Impaired loans balances, real estate as collateral	$ 1,000

Mortgage Servicing Rights Summa

Mortgage Servicing Rights Summary of Changes in 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	Dec. 31, 2019
Servicing Asset [Abstract]
Mortgage Loans Serviced By For Third Parties	$ 4,800,000		$ 4,800,000		$ 4,900,000
Fair value of MSRs	31,000		31,000		$ 45,200
Residential Mortgage
Amortized Cost:
Balance at beginning of period	38,854	$ 38,504	39,267	$ 38,573
Originations of MSRs	2,772	1,861	4,250	3,086
Amortization	(2,934)	(1,539)	(4,825)	(2,833)
Balance at end of period	38,692	38,826	38,692	38,826
Servicing Asset [Abstract]
Beginning balance	1,100	0	0	0
Additions to valuation allowance	6,600	0	7,700	0
Ending balance	7,700	0	7,700	0
Net MSRs at end of period	30,992	38,826	30,992	38,826
Fair value of MSRs	$ 30,992	$ 44,916	$ 30,992	$ 44,916

Derivative Financial Instrume_3

Derivative Financial Instruments Narrative (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
Derivative [Line Items]
Assets	$ 24,617,863		$ 24,617,863		$ 21,886,040
Foreign currency open position	500		500
Mortgage Loans Held For Sale [Member]
Derivative [Line Items]
Gain (loss) in fair values of mortgage loans held for sale	$ 1,400	$ 304	$ 2,100	$ 325

Derivative Financial Instrume_4

Derivative Financial Instruments Notional Amounts and Fair Values of Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Derivative [Line Items]
Derivative asset, fair value	$ 390,843	$ 144,371
Derivative liability, gross liability	(188,595)	(76,067)
Interest Rate Lock Commitments [Member]
Derivative [Line Items]
Derivative asset, notional amount	463,202	132,260
Derivative liability, notional amount	6,003	9,783
Derivative asset, fair value	10,614	1,123
Derivative liability, gross liability	(51)	(53)
Forward Commitments [Member]
Derivative [Line Items]
Derivative asset, notional amount	0	75,000
Derivative liability, notional amount	395,515	180,000
Derivative asset, fair value	0	63
Derivative liability, gross liability	(2,057)	(371)
Interest Rate Swap with Customer [Member]
Derivative [Line Items]
Derivative asset, notional amount	3,587,221	2,903,489
Derivative liability, notional amount	12,288	376,705
Derivative asset, fair value	390,701	143,484
Derivative liability, gross liability	(4)	(695)
Interest Rate Swap With Counterparty [Member]
Derivative [Line Items]
Derivative asset, notional amount	12,288	376,705
Derivative liability, notional amount	3,587,221	2,903,489
Derivative asset, fair value	4	695
Derivative liability, gross liability	(188,515)	(75,327)
Foreign Exchange Contracts With Customer [Member]
Derivative [Line Items]
Derivative asset, notional amount	7,174	3,373
Derivative liability, notional amount	5,248	7,283
Derivative asset, fair value	79	38
Derivative liability, gross liability	(92)	(154)
Foreign Exchange Contracts With Correspondent Banks [Member]
Derivative [Line Items]
Derivative asset, notional amount	10,090	9,028
Derivative liability, notional amount	5,774	4,976
Derivative asset, fair value	137	192
Derivative liability, gross liability	$ (76)	$ (45)

Derivative Financial Instrume_5

Derivative Financial Instruments Fair Value Gains and Losses on Derivative Financial Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Derivative [Line Items]
Net fair value gains on derivative financial instruments	$ 6,612	$ 234	$ 7,843	$ 795
Mortgage Banking Derivatives [Member]
Derivative [Line Items]
Net fair value gains on derivative financial instruments	6,704	(48)	7,744	614
Interest Rate Swap [Member]
Derivative [Line Items]
Net fair value gains on derivative financial instruments	10	296	82	147
Foreign Exchange Contract [Member]
Derivative [Line Items]
Net fair value gains on derivative financial instruments	$ (102)	$ (14)	$ 17	$ 34

Derivative Financial Instrume_6

Derivative Financial Instruments Summary of Mortgage Loans Held For Sale (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
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans held for sale	$ 77,415		$ 77,415		$ 37,828
Mortgage Loans Held For Sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value, Option, Changes in Fair Value, Gain (Loss)	1,400	$ 304	2,100	$ 325
Cost [Member] | Mortgage Loans Held For Sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans held for sale	74,868		74,868		37,396
Fair value [Member] | Mortgage Loans Held For Sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans held for sale	$ 77,415		$ 77,415		$ 37,828

Derivative Financial Instrume_7

Derivative Financial Instruments Offsetting Derivative Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Offsetting Assets [Line Items]
Derivative asset, fair value	$ 390,843	$ 144,371
Derivative, Collateral, Obligation to Return Securities	80	802
Derivative, Collateral, Obligation to Return Cash	0	0
Net Amount	390,763	143,569
Derivative liability, gross liability	188,595	76,067
Derivative liability, Collateral, Right to Reclaim Securities	(80)	(802)
Derivative liability, Collateral, Right to Reclaim Cash	(188,515)	(75,265)
Derivative liability, Net Amount	0	0
Interest Rate Swap [Member]
Offsetting Assets [Line Items]
Derivative asset, fair value	390,706	144,179
Derivative, Collateral, Obligation to Return Securities	4	757
Derivative, Collateral, Obligation to Return Cash	0	0
Net Amount	390,702	143,422
Derivative liability, gross liability	188,519	76,022
Derivative liability, Collateral, Right to Reclaim Securities	(4)	(757)
Derivative liability, Collateral, Right to Reclaim Cash	(188,515)	(75,265)
Derivative liability, Net Amount	0	0
Foreign Exchange Contract [Member]
Offsetting Assets [Line Items]
Derivative asset, fair value	137	192
Derivative, Collateral, Obligation to Return Securities	76	45
Derivative, Collateral, Obligation to Return Cash	0	0
Net Amount	61	147
Derivative liability, gross liability	76	45
Derivative liability, Collateral, Right to Reclaim Securities	(76)	(45)
Derivative liability, Collateral, Right to Reclaim Cash	0	0
Derivative liability, Net Amount	$ 0	$ 0

Tax Credit Investments (Details

Tax Credit Investments (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
Income Tax Disclosure [Abstract]
Affordable housing tax credit investment, net	$ 139,956		$ 139,956		$ 153,351
Other tax credit investments, net	62,932		62,932		64,354
Total TCIs, net	202,888		202,888		217,705
Unfunded affordable housing tax credit commitments	12,513		12,513		16,684
Other tax credit liabilities	54,823		54,823		55,105
Total unfunded tax credit commitments and liabilities	67,336		67,336		$ 71,789
Affordable housing tax credits and other tax benefits	(7,194)	$ (7,575)	(14,388)	$ (15,150)
Other tax credit investment credits and tax benefits	(941)	(1,135)	(1,882)	(2,271)
Amortization of affordable housing investments, net of tax benefit	5,023	5,494	10,047	10,989
Deferred tax expense	208	239	416	477
Total net reduction in income tax expense	(2,904)	(2,977)	(5,807)	(5,955)
Affordable housing tax credits investment	1,022	823	2,044	1,645
Other tax credit investment amortization	428	669	856	1,338
Total amortization of TCIs	$ 1,450	$ 1,492	$ 2,900	$ 2,983

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income Changes in Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Equity [Abstract]
Unrealized gain on securities, before tax amount	$ 44,199	$ 31,994	$ 66,581	$ 58,056
Unrealized gain on securities, tax effect	(9,775)	(7,077)	(14,728)	(12,841)
Unrealized gain on securities, net of tax amount	34,424	24,917	51,853	45,215
Reclassification adjustment for securities gains included in net income, before tax amount	(3,005)	(176)	(3,051)	(241)
Reclassification adjustment for securities gains included in net income, tax effect	664	39	675	53
Reclassification adjustment for securities gains included in net income, net of tax amount	(2,341)	(137)	(2,376)	(188)
Other Comprehensive Income (Loss), Reclassification Adjustment From AOCI For Amortization Of Unrealized Losses On Investments Transferred From Available-For-Sale To Held-To-Maturity, Before Tax	1,019	1,311	2,040	2,563
Other Comprehensive Income (Loss), Reclassification Adjustment From AOCI For Amortization Of Unrealized Losses On Investments Transferred From Available-For-Sale To Held-To-Maturity, Tax	(226)	(290)	(451)	(568)
Other Comprehensive Income (Loss), Reclassification Adjustment From AOCI For Amortization Of Unrealized Losses On Investments Transferred From Available-For-Sale To Held-To Maturity, After Tax	793	1,021	1,589	1,995
Non-credit related unrealized gains on other-than-temporarily impaired debt securities, before tax amount		(770)		(875)
Non-credit related unrealized gains on other-than-temporarily impaired debt securities, tax effect		170		193
Non-credit related unrealized gains on other-than-temporarily impaired debt securities, net of tax amount	0	(600)	0	(682)
Amortization of net unrecognized pension and postretirement items, before tax amount	328	353	656	727
Amortization of net unrecognized pension and postretirement items, tax effect	(73)	(78)	(146)	(161)
Amortization of net unrecognized pension and postretirement items, net of tax amount	255	275	510	566
Total Other Comprehensive Income, Before Tax Amount	42,541	32,712	66,226	60,230
Total Other Comprehensive Income, Tax Effect	(9,410)	(7,236)	(14,650)	(13,324)
Other Comprehensive Income	$ 33,131	$ 25,476	$ 51,576	$ 46,906

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income Components of Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	$ 2,285,748	$ 2,301,019	$ 2,342,176	$ 2,247,573
Ending Balance	2,340,501	2,308,798	2,340,501	2,308,798
Unrealized Gains (Losses) on Investment Securities
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	33,054	(23,433)	14,864	(44,654)
Other comprehensive income before reclassifications	34,424	24,917	51,853	45,215
Amounts reclassified from accumulated other comprehensive income	(2,341)	(137)	(2,376)	(188)
Ending Balance	65,930	2,368	65,930	2,368
Unrealized Non-Credit Gains (Losses) on Other-Than-Temporarily Impaired Debt Securities
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	0	598	0	680
Other comprehensive income before reclassifications	0	(600)	0	(682)
Amounts reclassified from accumulated other comprehensive income	0	0	0	0
Ending Balance	0	(2)	0	(2)
Unrecognized Pension and Postretirement Plan Income (Costs)
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(14,746)	(14,798)	(15,001)	(15,089)
Other comprehensive income before reclassifications	0	0	0	0
Amounts reclassified from accumulated other comprehensive income	255	275	510	566
Ending Balance	(14,491)	(14,523)	(14,491)	(14,523)
Total
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	18,308	(37,633)	(137)	(59,063)
Other comprehensive income before reclassifications	34,424	24,317	51,853	44,533
Amounts reclassified from accumulated other comprehensive income	(2,086)	138	(1,866)	378
Ending Balance	51,439	(12,157)	51,439	(12,157)
Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income [Roll Forward]
Amounts reclassified from accumulated other comprehensive income	793	1,021	1,589	1,995
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains (Losses) on Investment Securities
Accumulated Other Comprehensive Income [Roll Forward]
Amounts reclassified from accumulated other comprehensive income	793	1,021	1,589	1,995
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Non-Credit Gains (Losses) on Other-Than-Temporarily Impaired Debt Securities
Accumulated Other Comprehensive Income [Roll Forward]
Amounts reclassified from accumulated other comprehensive income	0	0	0	0
Reclassification out of Accumulated Other Comprehensive Income | Unrecognized Pension and Postretirement Plan Income (Costs)
Accumulated Other Comprehensive Income [Roll Forward]
Amounts reclassified from accumulated other comprehensive income	$ 0	$ 0	$ 0	$ 0

Fair Value Measurements Assets

Fair Value Measurements Assets and Liabilities Measured at Fair Value on a 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]
Estimated Fair Value	$ 2,644,299	$ 2,497,537
Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	2,644,299
Mortgages Held-for-sale, Fair Value Disclosure	77,415	37,828
Available-for-sale Securities, Fair Value Disclosure		2,497,537
Investments held in Rabbi Trust	20,555	22,213
Derivative assets	401,535	145,595
Assets, Fair Value Disclosure	3,143,804	2,703,173
Liabilities Held-In-Trust, Fair Value Disclosure	20,555	22,213
Derivative Liability	190,795	76,646
Total liabilities	211,350	98,859
US States and Political Subdivisions Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	893,682
Available-for-sale Securities, Fair Value Disclosure		652,927
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	893,682
Available-for-sale Securities, Fair Value Disclosure		652,927
Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	325,353
Available-for-sale Securities, Fair Value Disclosure		377,357
Corporate Debt Securities [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	325,353
Available-for-sale Securities, Fair Value Disclosure		377,357
Collateralized Mortgage Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	578,394
Available-for-sale Securities, Fair Value Disclosure		693,718
Collateralized Mortgage Obligations [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	578,394
Available-for-sale Securities, Fair Value Disclosure		693,718
Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	160,868
Available-for-sale Securities, Fair Value Disclosure		177,312
Mortgage-Backed Securities [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	160,868
Available-for-sale Securities, Fair Value Disclosure		177,312
Commercial Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	585,143
Available-for-sale Securities, Fair Value Disclosure		494,297
Commercial Mortgage Backed Securities [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	585,143
Available-for-sale Securities, Fair Value Disclosure		494,297
Auction Rate Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	100,859
Available-for-sale Securities, Fair Value Disclosure		101,926
Auction Rate Securities [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	100,859
Available-for-sale Securities, Fair Value Disclosure		101,926
Single-issuer Trust Preferred Securities [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0	11,200
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0
Mortgages Held-for-sale, Fair Value Disclosure	0	0
Available-for-sale Securities, Fair Value Disclosure		0
Investments held in Rabbi Trust	20,555	22,213
Derivative assets	216	230
Assets, Fair Value Disclosure	20,771	22,443
Liabilities Held-In-Trust, Fair Value Disclosure	20,555	22,213
Derivative Liability	168	199
Total liabilities	20,723	22,412
Fair Value, Inputs, Level 1 [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0
Available-for-sale Securities, Fair Value Disclosure		0
Fair Value, Inputs, Level 1 [Member] | Corporate Debt Securities [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0
Available-for-sale Securities, Fair Value Disclosure		0
Fair Value, Inputs, Level 1 [Member] | Collateralized Mortgage Obligations [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0
Available-for-sale Securities, Fair Value Disclosure		0
Fair Value, Inputs, Level 1 [Member] | Mortgage-Backed Securities [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0
Available-for-sale Securities, Fair Value Disclosure		0
Fair Value, Inputs, Level 1 [Member] | Commercial Mortgage Backed Securities [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0
Available-for-sale Securities, Fair Value Disclosure		0
Fair Value, Inputs, Level 1 [Member] | Auction Rate Securities [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0
Available-for-sale Securities, Fair Value Disclosure		0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	2,543,440
Mortgages Held-for-sale, Fair Value Disclosure	77,415	37,828
Available-for-sale Securities, Fair Value Disclosure		2,393,211
Investments held in Rabbi Trust	0	0
Derivative assets	401,319	145,365
Assets, Fair Value Disclosure	3,022,174	2,576,404
Liabilities Held-In-Trust, Fair Value Disclosure	0	0
Derivative Liability	190,627	76,447
Total liabilities	190,627	76,447
Fair Value, Inputs, Level 2 [Member] | Other Corporate Debt [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	4,400	3,900
Fair Value, Inputs, Level 2 [Member] | Financial Institutions Subordinated Debt [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	321,000	362,300
Fair Value, Inputs, Level 2 [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	893,682
Available-for-sale Securities, Fair Value Disclosure		652,927
Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	325,353
Available-for-sale Securities, Fair Value Disclosure		374,957
Fair Value, Inputs, Level 2 [Member] | Collateralized Mortgage Obligations [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	578,394
Available-for-sale Securities, Fair Value Disclosure		693,718
Fair Value, Inputs, Level 2 [Member] | Mortgage-Backed Securities [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	160,868
Available-for-sale Securities, Fair Value Disclosure		177,312
Fair Value, Inputs, Level 2 [Member] | Commercial Mortgage Backed Securities [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	585,143
Available-for-sale Securities, Fair Value Disclosure		494,297
Fair Value, Inputs, Level 2 [Member] | Auction Rate Securities [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0
Available-for-sale Securities, Fair Value Disclosure		0
Fair Value, Inputs, Level 2 [Member] | Single-issuer Trust Preferred Securities [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0	8,800
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	100,859
Mortgages Held-for-sale, Fair Value Disclosure	0	0
Available-for-sale Securities, Fair Value Disclosure		104,326
Investments held in Rabbi Trust	0	0
Derivative assets	0	0
Assets, Fair Value Disclosure	100,859	104,326
Liabilities Held-In-Trust, Fair Value Disclosure	0	0
Derivative Liability	0	0
Total liabilities	0	0
Fair Value, Inputs, Level 3 [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0
Available-for-sale Securities, Fair Value Disclosure		0
Fair Value, Inputs, Level 3 [Member] | Corporate Debt Securities [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0
Available-for-sale Securities, Fair Value Disclosure		2,400
Fair Value, Inputs, Level 3 [Member] | Collateralized Mortgage Obligations [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0
Available-for-sale Securities, Fair Value Disclosure		0
Fair Value, Inputs, Level 3 [Member] | Mortgage-Backed Securities [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0
Available-for-sale Securities, Fair Value Disclosure		0
Fair Value, Inputs, Level 3 [Member] | Commercial Mortgage Backed Securities [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0
Available-for-sale Securities, Fair Value Disclosure		0
Fair Value, Inputs, Level 3 [Member] | Auction Rate Securities [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	100,859
Available-for-sale Securities, Fair Value Disclosure		101,926
Fair Value, Inputs, Level 3 [Member] | Single-issuer Trust Preferred Securities [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	$ 0	$ 2,400

Fair Value Measurements Changes

Fair Value Measurements Changes in Assets and Liabilities Measured at Fair Value on a Recurring Basis Using Level 3 Inputs (Details) - Fair Value, Recurring [Member] - Fair Value, Inputs, Level 3 [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Pooled Trust Preferred Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	$ 0	$ 770	$ 0	$ 875
Sales	0	(770)	0	(770)
Unrealized adjustment to fair value	0	0	0	(105)
(Premium amortization) discount accretion			0
Balance, end of period	0	0	0	0
Single-issuer Trust Preferred Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	2,160	2,430	2,400	2,400
Sales	(2,160)	0	(2,160)	0
Unrealized adjustment to fair value	0	(60)	(242)	(30)
(Premium amortization) discount accretion			2
Balance, end of period	0	2,370	0	2,370
Auction Rate Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	93,666	102,810	101,926	102,994
Sales	0	0	0	0
Unrealized adjustment to fair value	7,193	555	(1,067)	371
(Premium amortization) discount accretion			0
Balance, end of period	$ 100,859	$ 103,365	$ 100,859	$ 103,365

Fair Value Measurements Asset_2

Fair Value Measurements Assets Measured at Fair Value on a Nonrecurring 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	$ 5,418	$ 6,831
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans	108,746	144,807
OREO	5,418	6,831
MSRs (1)	30,992	45,193
Assets, Fair Value Disclosure	$ 145,156	$ 196,831

Fair Value Measurements Details

Fair Value Measurements Details of Book Value and Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Fair Value, Balance Sheet Grouping, FinancialStatement Captions[Line Items]
HTM securities	$ 354,109
Estimated Fair Value	2,644,299	$ 2,497,537
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, FinancialStatement Captions[Line Items]
Cash and due from banks	1,058,599	517,791
FRB and FHLB stock	91,042	97,422
Loans held for sale	77,415	37,828
HTM securities	330,514	369,841
Estimated Fair Value	2,644,299	2,497,537
Net Loans	18,448,185	16,673,904
Accrued interest receivable	73,720	60,898
Other financial assets	706,518	431,565
Demand and savings deposits	17,006,353	14,327,453
Brokered deposits	310,689	264,531
Time deposits	2,567,166	2,801,930
Short-term borrowings	572,551	883,241
Accrued interest payable	11,571	8,834
Other financial liabilities	369,624	221,542
FHLB advances and long-term debt	1,295,196	881,769
Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, FinancialStatement Captions[Line Items]
Cash and due from banks	1,058,599	517,791
FRB and FHLB stock	91,042	97,422
Loans held for sale	77,415	37,828
HTM securities	354,109	383,705
Estimated Fair Value	2,644,299	2,497,537
Net Loans	18,173,117	16,485,122
Accrued interest receivable	73,720	60,898
Other financial assets	706,518	431,565
Demand and savings deposits	17,006,353	14,327,453
Brokered deposits	310,689	264,531
Time deposits	2,599,932	2,828,988
Short-term borrowings	572,551	883,241
Accrued interest payable	11,571	8,834
Other financial liabilities	369,624	221,542
FHLB advances and long-term debt	1,342,497	878,385
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, FinancialStatement Captions[Line Items]
Cash and due from banks	1,058,599	517,791
FRB and FHLB stock	0	0
Loans held for sale	0	0
HTM securities	0	0
Estimated Fair Value	0	0
Net Loans	0	0
Accrued interest receivable	73,720	60,898
Other financial assets	268,789	234,176
Demand and savings deposits	17,006,353	14,327,453
Brokered deposits	268,618	223,982
Time deposits	0	0
Short-term borrowings	572,551	883,241
Accrued interest payable	11,571	8,834
Other financial liabilities	162,614	142,508
FHLB advances and long-term debt	0	0
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, FinancialStatement Captions[Line Items]
Cash and due from banks	0	0
FRB and FHLB stock	91,042	97,422
Loans held for sale	77,415	37,828
HTM securities	354,109	383,705
Estimated Fair Value	2,543,440	2,393,211
Net Loans	0	0
Accrued interest receivable	0	0
Other financial assets	401,319	145,365
Demand and savings deposits	0	0
Brokered deposits	42,071	40,549
Time deposits	2,599,932	2,828,988
Short-term borrowings	0	0
Accrued interest payable	0	0
Other financial liabilities	190,627	76,447
FHLB advances and long-term debt	1,342,497	878,385
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, FinancialStatement Captions[Line Items]
Cash and due from banks	0	0
FRB and FHLB stock	0	0
Loans held for sale	0	0
HTM securities	0	0
Estimated Fair Value	100,859	104,326
Net Loans	18,173,117	16,485,122
Accrued interest receivable	0	0
Other financial assets	36,410	52,024
Demand and savings deposits	0	0
Brokered deposits	0	0
Time deposits	0	0
Short-term borrowings	0	0
Accrued interest payable	0	0
Other financial liabilities	16,383	2,587
FHLB advances and long-term debt	$ 0	$ 0

Fair Value Measurements Narrati

Fair Value Measurements Narrative (Details) - USD ($) shares in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities valued by the pricing service	95.00%
Researched securities to reconcile the difference	5.00%
AFS, at estimated fair value	$ 2,644,299	$ 2,497,537
Significant input, assumed market return to liquidity (years)	5 years
Other real estate owned (OREO)	$ 5,418	6,831
Common Class B [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment owned, balance (in shares)	133
Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted average annual constant prepayment rate	17.50%
Weighted average discount rate	9.50%
Fair Value, Recurring [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
AFS, at estimated fair value	$ 2,644,299
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
AFS, at estimated fair value	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
AFS, at estimated fair value	2,543,440
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
AFS, at estimated fair value	100,859
Fair Value, Recurring [Member] | Financial Institutions Subordinated Debt [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
AFS, at estimated fair value	321,000	362,300
Fair Value, Recurring [Member] | Single-issuer Trust Preferred Securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
AFS, at estimated fair value	0	11,200
Fair Value, Recurring [Member] | Single-issuer Trust Preferred Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
AFS, at estimated fair value	0	8,800
Fair Value, Recurring [Member] | Single-issuer Trust Preferred Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
AFS, at estimated fair value	0	2,400
Fair Value, Recurring [Member] | Other Corporate Debt [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
AFS, at estimated fair value	4,400	3,900
Fair Value, Recurring [Member] | Foreign Exchange Contract [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other financial liabilities	168	199
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other real estate owned (OREO)	5,418	6,831
Net MSRs at end of period	30,992	45,193
Foreign Exchange Contract [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other financial assets	216	230
Forward Commitments [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other financial assets	10,600	1,200
Other financial liabilities	2,100	424
Interest Rate Swap [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other financial assets	390,700	144,200
Other financial liabilities	$ 188,500	$ 76,000

Net Income Per Share Reconcilia

Net Income Per Share Reconciliation of Weighted Average Common Shares Outstanding (Details) - $ / shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Weighted average shares outstanding (basic) (in shares)	161,715	168,343	162,582	169,109
Impact of common stock equivalents (in shares)	552	825	744	933
Weighted average shares outstanding (diluted) (in shares)	162,267	169,168	163,326	170,042
Basic (in dollars per share)	$ 0.24	$ 0.36	$ 0.40	$ 0.69
Diluted (in dollars per share)	$ 0.24	$ 0.35	$ 0.40	$ 0.68

Stock-Based Compensation Compen

Stock-Based Compensation Compensation Expense and Related Tax Benefits (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Share-based Payment Arrangement [Abstract]
Compensation expense	$ 1,911	$ 1,788	$ 3,530	$ 3,348
Tax benefit	(403)	(412)	(747)	(743)
Stock-based compensation expense, net of tax benefit	$ 1,508	$ 1,376	$ 2,783	$ 2,605

Stock-Based Compensation Narrat

Stock-Based Compensation Narrative (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement [Line Items]
Compensation expense	$ 1,911	$ 1,788	$ 3,530	$ 3,348
Stock-based compensation expense, net of tax benefit	$ 1,508	$ 1,376	$ 2,783	$ 2,605
Directors' Plan [Member]
Statement [Line Items]
Shares reserved for future grants under the stock option and compensation plan	181		181
Employee Equity Plan [Member]
Statement [Line Items]
Awards vesting period (in years)			3 years
Shares reserved for future grants under the stock option and compensation plan	9,300		9,300

Employee Benefit Plans Summary

Employee Benefit Plans Summary of Pension Plan and Postretirement Plan Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 681	$ 815	$ 1,362	$ 1,630
Expected return on plan assets	(982)	(689)	(1,964)	(1,378)
Net amortization and deferral	465	495	930	990
Net periodic benefit	164	621	328	1,242
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	11	15	22	30
Net accretion and deferral	(137)	(139)	(274)	(278)
Net periodic benefit	$ (126)	$ (124)	$ (252)	$ (248)

Commitments and Contingencies O

Commitments and Contingencies Outstanding Commitments to Extend Credit and Letters of Credit (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Commitments to Extend Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Valuation allowances and reserves, balance	$ 8,140,293	$ 6,689,519
Standby Letters of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Valuation allowances and reserves, balance	294,647	303,020
Commercial Letters of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Valuation allowances and reserves, balance	$ 52,100	$ 50,432

Commitments and Contingencies -

Commitments and Contingencies - Narrative (Details) - Residential Mortgage - USD ($) $ in Millions	Jun. 30, 2020	Jan. 01, 2020	Dec. 31, 2019
Loss Contingencies [Line Items]
Valuation allowances and reserves, balance	$ 1.1		$ 3.2
Accounting Standards Update 2016-13
Loss Contingencies [Line Items]
Valuation allowances and reserves, balance		$ (2.1)

Long-Term Debt (Details)

Long-Term Debt (Details) - Subordinated Debt $ in Millions	Jun. 30, 2020USD ($)
3.25% Notes due 2030
Debt Instrument [Line Items]
Debt instrument, face amount	$ 200
Debt instrument, interest rate (as a percent)	3.25%
Debt instrument, effective rate (as a percent)	3.35%
3.75% Notes due 2035
Debt Instrument [Line Items]
Debt instrument, face amount	$ 175
Debt instrument, interest rate (as a percent)	3.75%
Debt instrument, effective rate (as a percent)	3.85%

Uncategorized Items - fult-2020

Label	Element	Value
Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ (43,807,000)