Associated Banc-Corp (ASB) 10-Q 11 May 20 2020 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2020	May 07, 2020
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2020
Document Transition Report	false
Entity File Number	001-31343
Entity Registrant Name	Associated Banc-Corp
Entity Incorporation, State or Country Code	WI
Entity Address, Address Line One	433 Main Street
Entity Address, City or Town	Green Bay,
Entity Address, State or Province	WI
Entity Tax Identification Number	39-1098068
Entity Address, Postal Zip Code	54301
City Area Code	920
Local Phone Number	491-7500
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		153,673,563
Entity Central Index Key	0000007789
Amendment Flag	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--12-31
The New York Stock Exchange
Entity Information [Line Items]
Title of 12(b) Security	Common stock, par value $0.01 per share
Trading Symbol	ASB
Security Exchange Name	NYSE
Series C Preferred Stock | The New York Stock Exchange
Entity Information [Line Items]
Title of 12(b) Security	Depositary Shrs, each representing 1/40th intrst in a shr of 6.125% Non-Cum. Perp Pref Stock, Srs C
Trading Symbol	ASB PrC
Security Exchange Name	NYSE
Series D Preferred Stock | The New York Stock Exchange
Entity Information [Line Items]
Title of 12(b) Security	Depositary Shrs, each representing 1/40th intrst in a shr of 5.375% Non-Cum. Perp Pref Stock, Srs D
Trading Symbol	ASB PrD
Security Exchange Name	NYSE
Series E Preferred Stock | The New York Stock Exchange
Entity Information [Line Items]
Title of 12(b) Security	Depositary Shrs, each representing 1/40th intrst in a shr of 5.875% Non-Cum. Perp Pref Stock, Srs E
Trading Symbol	ASB PrE
Security Exchange Name	NYSE

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020		Dec. 31, 2019
Assets
Cash and due from banks	$ 480,337		$ 373,380
Interest-bearing deposits in other financial institutions	176,440		207,624
Federal funds sold and securities purchased under agreements to resell	22,455		7,740
Investment securities held to maturity, net, at amortized cost(a)	2,149,373	[1]	2,205,083
Investment securities available for sale, at fair value	2,928,787		3,262,586
Equity securities	15,063		15,090
Federal Home Loan Bank and Federal Reserve Bank stocks, at cost	222,922		227,347
Loans	24,365,633		22,821,440
Allowance for loan losses(b)	(337,793)	[2]	(201,371)
Loans, net	24,027,841		22,620,068
Bank and corporate owned life insurance	674,026		671,948
Tax credit and other investments	315,909		279,969
Premises and equipment, net	438,469		435,284
Goodwill	1,191,388		1,176,230
Mortgage servicing rights, net	58,289		67,306
Other intangible assets, net	92,723		88,301
Interest Receivable	92,377		91,196
Other assets	655,328		506,046
Total assets	33,908,056		32,386,478
Liabilities and Stockholders' Equity
Noninterest-bearing demand deposits	6,107,386		5,450,709
Interest-bearing deposits	19,554,194		18,328,355
Total deposits	25,661,580		23,779,064
Federal funds purchased and securities sold under agreements to repurchase	133,007		433,097
Commercial paper	33,647		32,016
FHLB advances	3,214,194		3,180,967
Other long-term funding	549,644		549,343
Unfunded Commitments	56,276	[2]	21,907
Accrued expenses and other liabilities(b)	469,236	[2]	467,961
Total liabilities	30,117,584		28,464,355
Stockholders’ Equity
Preferred equity	256,716		256,716
Common stock	1,752		1,752
Surplus	1,706,516		1,716,431
Retained earnings(b)	2,296,176	[2]	2,380,867
Accumulated other comprehensive income (loss)	(16,974)		(33,183)
Treasury stock, at cost	(453,714)		(400,460)
Total common equity	3,533,755		3,665,407
Total stockholders’ equity	3,790,471		3,922,124
Total liabilities and stockholders’ equity	$ 33,908,056		$ 32,386,478
Preferred shares authorized (par value $1.00 per share)	750,000		750,000
Preferred shares issued and outstanding	264,458		264,458
Common shares authorized (par value $0.01 per share)	250,000,000		250,000,000
Common shares issued	175,216,409		175,216,409
Common shares outstanding	153,690,421		157,171,247
Residential loans held for sale
Assets
Loans Receivable Held-for-sale, Amount	$ 366,330		$ 136,280
Loans	8,132,417		8,136,980
Commercial loans held for sale
Assets
Loans Receivable Held-for-sale, Amount	0		15,000
Loans	$ 15,041,555		13,481,275
Allowance for loan losses(b)			$ (166,846)
[1]	(a) At March 31, 2020, the investment securities held to maturity are reported net of the related allowance for credit losses on investments. Prior periods were unadjusted due to the modified retrospective application of ASU 2016-13.
[2]	(b) At January 1, 2020, the adoption of ASU 2016-13 resulted in an increase to the allowance for loan losses of $112 million and an increase to the allowance for unfunded commitments of $19 million for a total increase to the ACLL of $131 million. A corresponding after tax decrease to common equity of $98 million was recorded along with a deferred tax asset of $33 million, included in accrued expenses and other liabilities. Prior periods were unadjusted due to the modified retrospective application of ASU 2016-13.

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2020		Jan. 01, 2020	Dec. 31, 2019
Preferred shares, par value	$ 1			$ 1
Common shares, par value	$ 0.01			$ 0.01
Allowance for Unfunded Commitments	$ 56,276			$ 21,907
Allowance for Loan Losses				201,371
Retained Earnings (Accumulated Deficit)	2,296,176	[1]		2,380,867
Accounting Standards Update 2016-13
Retained Earnings (Accumulated Deficit)			$ 98,000
Deferred Income Tax Assets, Net			33,000
Cumulative Effect, Period Of Adoption, Adjustment
Allowance for Loan Losses			131,147
Allowance for Loan Losses [Member]
Allowance for Loan Losses	337,793			201,371
Allowance for Loan Losses [Member] | Cumulative Effect, Period Of Adoption, Adjustment | Accounting Standards Update 2016-13
Allowance for Loan Losses			112,000
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member]
Allowance for Unfunded Commitments	$ 56,276			$ 21,907
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Cumulative Effect, Period Of Adoption, Adjustment | Accounting Standards Update 2016-13
Allowance for Unfunded Commitments			19,000
Allowance for Loans Losses and Unfunded Commitments [Member] | Cumulative Effect, Period Of Adoption, Adjustment | Accounting Standards Update 2016-13
Allowance for Loan Losses			$ 131,000
[1]	(b) At January 1, 2020, the adoption of ASU 2016-13 resulted in an increase to the allowance for loan losses of $112 million and an increase to the allowance for unfunded commitments of $19 million for a total increase to the ACLL of $131 million. A corresponding after tax decrease to common equity of $98 million was recorded along with a deferred tax asset of $33 million, included in accrued expenses and other liabilities. Prior periods were unadjusted due to the modified retrospective application of ASU 2016-13.

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Interest income
Interest and fees on loans		$ 224,786,000	$ 258,853,000
Interest and dividends on investment securities
Taxable		20,272,000	29,053,000
Tax-exempt		14,882,000	13,816,000
Other interest		3,304,000	4,226,000
Total interest income		263,244,000	305,948,000
Interest expense
Interest on deposits		36,666,000	62,773,000
Interest on federal funds purchased and securities sold under agreements to repurchase		368,000	627,000
Interest on other short-term funding		39,000	51,000
Interest on FHLB advances		17,626,000	19,554,000
Interest on long-term funding		5,604,000	7,396,000
Total interest expense		60,303,000	90,401,000
Net interest income		202,942,000	215,547,000
Provision for credit losses		53,001,000	6,000,000
Net interest income after provision for credit losses		149,941,000	209,547,000
Noninterest income
Noninterest Income In Scope of Topic 606		71,348,000	72,738,000
Capital markets, net		7,935,000	3,189,000
Mortgage banking, net		6,143,000	4,712,000
Bank and corporate owned life insurance		3,094,000	3,792,000
Asset gains (losses), net		(77,000)	567,000
Investment securities gains (losses), net		6,118,000	1,680,000
Other		2,352,000	3,260,000
Total noninterest income		98,306,000	91,202,000
Noninterest expense
Personnel		114,200,000	120,050,000
Technology		20,799,000	19,012,000
Occupancy		16,069,000	16,472,000
Business development and advertising		5,826,000	6,636,000
Equipment		5,439,000	5,668,000
Legal and professional		5,160,000	3,951,000
Loan and foreclosure costs		3,120,000	2,146,000
FDIC assessment		5,500,000	3,750,000
Other intangible amortization		2,814,000	2,226,000
Other		11,543,000	11,128,000
Total noninterest expense		192,191,000	191,671,000
Income (loss) before income taxes		56,056,000	109,078,000
Income tax expense		10,219,000	22,392,000
Net income		45,838,000	86,686,000
Preferred stock dividends		3,801,000	3,801,000
Net income available to common equity		$ 42,037,000	$ 82,885,000
Earnings per common share
Basic		$ 0.27	$ 0.50
Diluted		$ 0.27	$ 0.50
Average common shares outstanding
Basic		154,701	163,928
Diluted		155,619	165,433
Insurance commissions and fees
Noninterest income
Noninterest Income In Scope of Topic 606		$ 22,608,000	$ 25,464,000
Wealth management fees(a)
Noninterest income
Noninterest Income In Scope of Topic 606	[1]	20,816,000	20,180,000
Service charges and deposit account fees
Noninterest income
Noninterest Income In Scope of Topic 606		15,222,000	15,115,000
Card-based fees
Noninterest income
Noninterest Income In Scope of Topic 606		9,607,000	9,295,000
Service charges and account fees		9,597,000	9,261,000
Other fee-based revenue
Noninterest income
Noninterest Income In Scope of Topic 606		3,096,000	2,684,000
Service charges and account fees		4,497,000	3,983,000
Operating Segments | Risk Management and Shared Services
Interest expense
Net interest income		14,537,000	11,567,000
Provision for credit losses		34,719,000	(12,518,000)
Noninterest income
Total noninterest income		5,854,000	5,533,000
Noninterest expense
Acquisition related costs(b)	[2]	1,721,000	632,000
Total noninterest expense		23,162,000	22,414,000
Income (loss) before income taxes		(43,838,000)	6,384,000
Income tax expense		(9,149,000)	1,840,000
Net income		$ (34,689,000)	$ 4,543,000
[1]	(a) Includes trust, asset management, brokerage, and annuity fees.
[2]	(b) Includes Huntington branch and First Staunton acquisition related costs only.

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 45,838	$ 86,686
Investment securities available for sale
Net unrealized gains (losses)	26,419	30,490
Amortization of net unrealized (gains) losses on available for sale securities transferred to held to maturity securities	556	69
Reclassification adjustment for net losses (gains) realized in net income	(6,118)	(1,680)
Income tax (expense) benefit	(5,225)	(7,301)
Other comprehensive income (loss) on investment securities available for sale	15,632	21,578
Defined benefit pension and postretirement obligations
Amortization of prior service cost	(38)	(38)
Amortization of actuarial loss (gain)	808	64
Income tax (expense) benefit	(193)	(7)
Other comprehensive income (loss) on pension and postretirement obligations	577	20
Total other comprehensive income (loss)	16,209	21,597
Comprehensive income	$ 62,046	$ 108,283

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands		Total	Performance/Service Based RSAs, RSA,	Board Authorized Purchase Program [Member]	Series C Preferred Stock	Series D Preferred Stock	Series E Preferred Stock	Preferred Equity	Common Stock	Surplus	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Treasury StockPerformance/Service Based RSAs, RSA,	Treasury StockBoard Authorized Purchase Program [Member]
Beginning balance at Dec. 31, 2018		$ 3,780,888						$ 256,716	$ 1,752	$ 1,712,615	$ 2,181,414	$ (124,972)	$ (246,638)
Comprehensive income
Net income		86,686									86,686
Other comprehensive income (loss)		21,597										21,597
Comprehensive income		108,283
Common stock issued
Stock-based compensation plans, net		7,045								(32,220)			39,265
Purchase of treasury stock,			$ (7,468)	$ (29,999)										$ (7,468)	$ (29,999)
Cash dividends
Common stock ($0.17 per share in 2019 and $0.18 per share in 2020)		(28,183)									(28,183)
Preferred stock(a)	[1]	(3,801)									(3,801)
Stock-based compensation expense, net		9,397								9,397
Other		(293)									(293)
Ending balance at Mar. 31, 2019		3,835,870						256,716	1,752	1,689,792	2,235,824	(103,375)	(244,840)
Cash dividends
Preferred Stock, Dividends, Per Share, Cash Paid					$ 0.3828125	$ 0.3359375	$ 0.3671875
Cumulative effect of ASU 2016-13 adoption (CECL) | Accounting Standards Update 2016-13		(98,337)									(98,337)
Total shareholder's equity at beginning of period, as adjusted		3,823,787						256,716	1,752	1,716,431	2,282,530	(33,183)	(400,460)
Beginning balance at Dec. 31, 2019		3,922,124						256,716	1,752	1,716,431	2,380,867	(33,183)	(400,460)
Comprehensive income
Net income		45,838									45,838
Other comprehensive income (loss)		16,209										16,209
Comprehensive income		62,046
Common stock issued
Stock-based compensation plans, net		2,896								(20,659)			23,555
Purchase of treasury stock,			$ (5,555)	$ (71,255)										$ (5,555)	$ (71,255)
Cash dividends
Common stock ($0.17 per share in 2019 and $0.18 per share in 2020)		(28,392)									(28,392)
Preferred stock(a)	[1]	(3,801)									(3,801)
Stock-based compensation expense, net		10,744								10,744
Ending balance at Mar. 31, 2020		$ 3,790,471						$ 256,716	$ 1,752	$ 1,706,516	$ 2,296,176	$ (16,974)	$ (453,714)
Cash dividends
Preferred Stock, Dividends, Per Share, Cash Paid					$ 0.3828125	$ 0.3359375	$ 0.3671875
[1]	(a) Series C, $0.3828125 per share; Series D, $0.3359375 per share; and Series E, $0.3671875 per share.

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Common Stock, Dividends, Per Share, Cash Paid	$ 0.18	$ 0.17

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Cash Flow From Operating Activities
Net income	$ 45,838	$ 86,686
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Provision for credit losses	53,001	6,000
Depreciation and amortization	14,971	14,358
Addition to (recovery of) valuation allowance on mortgage servicing rights, net	9,098	121
Amortization of mortgage servicing rights	3,635	2,693
Amortization during the year	2,814	2,226
Amortization and accretion on earning assets, funding, and other, net	5,728	6,571
Net amortization of tax credit investments	6,486	5,637
Losses (gains) on sales of investment securities, net	(6,118)	(1,680)
Asset (gains) losses, net	(77)	567
(Gain) loss on mortgage banking activities, net	(14,274)	(3,174)
Mortgage loans originated and acquired for sale	(310,254)	(162,521)
Proceeds from sales of mortgage loans held for sale	297,265	159,842
Changes in certain assets and liabilities
(Increase) decrease in interest receivable	(1,181)	(12,068)
Increase (decrease) in interest payable	(6,511)	(1,516)
Increase (decrease) in expense payable	(61,924)	(51,247)
(Increase) decrease in net derivative position	(77,369)	(54,411)
Net change in other assets and other liabilities	18,636	(10,552)
Net cash provided by (used in) operating activities	(20,083)	(13,602)
Cash Flow From Investing Activities
Net increase in loans	(1,395,767)	(216,817)
Purchases of
Available for sale securities	(93,487)	(120,282)
Held to maturity securities	(29,463)	(140,670)
Federal Home Loan Bank and Federal Reserve Bank stocks	(49,794)	(88,245)
Premises, equipment, and software, net of disposals	(11,045)	(13,368)
Other intangibles	(200)	0
Proceeds from
Sales of available for sale securities	365,239	131,122
Sale of Federal Home Loan Bank and Federal Reserve Bank stocks	55,000	121,839
Prepayments, calls, and maturities of available for sale investment securities	186,496	135,541
Prepayments, calls, and maturities of held to maturity investment securities	84,360	43,953
Sales, prepayments, calls, and maturities of other assets	10,482	3,179
Net change in tax credit and alternative investments	(17,877)	(18,772)
Net cash (paid) received in acquisition	(31,452)	0
Net cash provided by (used in) investing activities	(927,507)	(162,518)
Cash Flow From Financing Activities
Net increase (decrease) in deposits	1,443,965	635,664
Net increase (decrease) in short-term funding	(324,317)	2,043
Net increase (decrease) in short-term FHLB advances	30,000	(880,000)
Repayment of long-term FHLB advances	(5,464)	(169)
Proceeds from long-term FHLB advances	0	250,633
Proceeds from finance lease principal	1	0
Proceeds from issuance of common stock for stock-based compensation plans	2,896	7,045
Cash dividends on common stock	(28,392)	(28,183)
Cash dividends on preferred stock	(3,801)	(3,801)
Net cash provided by (used in) financing activities	1,038,079	(54,235)
Net increase (decrease) in cash, cash equivalents, and restricted cash	90,488	(230,355)
Cash, cash equivalents, and restricted cash at beginning of period	588,744	876,698	$ 876,698
Cash, cash equivalents, and restricted cash at end of period	679,232	646,343	588,744
Supplemental disclosures of cash flow information
Cash paid for interest	66,316	91,521
Cash paid for (received from) income and franchise taxes	1,373	(5,760)
Loans and bank premises transferred to OREO	3,374	2,222
Capitalized mortgage servicing rights	3,716	1,247
Loans transferred into held for sale from portfolio, net	205,065	1,074
Unsettled trades to purchase securities	0	11,244
Acquisition
Fair value of assets acquired, including cash and cash equivalents				$ 457,448	$ 0
Fair value ascribed to goodwill and intangible assets				22,538	(79)
Fair value of liabilities assumed				479,985	0
Equity issued in (adjustments related to) acquisition	0	(79)
Restricted Cash and Cash Equivalents
Cash and cash equivalents				679,232	489,095
Restricted cash				0	157,248
Total cash, cash equivalents, and restricted cash shown in the statement of cash flows	679,232	646,343	$ 876,698	$ 679,232	$ 646,343
Performance/Service Based RSAs, RSA,
Cash Flow From Financing Activities
Payments for Repurchase of Common Stock	(5,555)	(7,468)
Board Authorized Purchase Program [Member]
Cash Flow From Financing Activities
Payments for Repurchase of Common Stock	$ (71,255)	$ (29,999)

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation In the opinion of management, the accompanying unaudited consolidated financial statements contain all adjustments necessary to present fairly the financial position, results of operations and comprehensive income, changes in stockholders’ equity, and cash flows of the Corporation and Parent Company for the periods presented, and all such adjustments are of a normal recurring nature. The consolidated financial statements include the accounts of all subsidiaries. All significant intercompany transactions and balances have been eliminated in consolidation. The results of operations for the interim periods are not necessarily indicative of the results to be expected for the full year. In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the balance sheet and revenues and expenses for the period. Actual results could differ significantly from those estimates. Estimates that are particularly susceptible to significant change include the determination of the ACLL, goodwill impairment assessment, MSRs valuation, and income taxes. Management has evaluated subsequent events for potential recognition or disclosure. Within the tables presented, certain columns and rows may not sum due to the use of rounded numbers for disclosure purposes.

Acquisitions

Acquisitions	3 Months Ended
	Mar. 31, 2020
Business Combinations [Abstract]
Acquisitions	Acquisitions First Staunton Acquisition On February 14, 2020, the Corporation completed its acquisition of First Staunton. The Corporation paid a 4% premium on acquired deposits. The conversion of the branches was completed simultaneously with the close of the transaction, expanding the banks presence into 9 new Metro-East St. Louis communities. As a result of the acquisition and other consolidations, a net of 7 branch locations were added. The First Staunton acquisition constituted a business combination. The acquisition has been accounted for using the acquisition method of accounting and, accordingly, assets acquired, liabilities assumed, and consideration exchanged were recorded at estimated fair value on the acquisition date. The determination of estimated fair values required management to make certain estimates that are subjective in nature and may require adjustments upon the availability of new information regarding facts and circumstances which existed at the date of acquisition (i.e., appraisals) for up to a year following the acquisition. The Corporation continues to review information relating to events or circumstances existing at the acquisition date. Management anticipates that this review could result in adjustments to the acquisition date valuation amounts presented herein but does not anticipate that these adjustments will be material. The Corporation recorded approximately $15 million in goodwill related to the First Staunton acquisition during the first quarter of 2020. Goodwill created by the acquisition is not tax deductible. See Note 8 for additional information on goodwill, as well as the carrying amount and amortization of CDI assets related to the First Staunton acquisition. The following table presents the estimated fair values of the assets acquired and liabilities assumed as of the acquisition date related to the First Staunton acquisition: ($ in Thousands) Purchase Accounting Adjustments February 14, 2020 Assets Cash and cash equivalents $ — $ 44,848 Investment securities available for sale (24) 98,743 Federal Home Loan Bank and Federal Reserve Bank stocks, at cost — 781 Loans (4,808) 369,684 Premises and equipment, net (3,005) 4,865 Bank owned life insurance 9 6,770 Goodwill 15,158 Core deposit intangibles (included in other intangible assets, net on the face of the consolidated balance sheets) 7,379 7,379 OREO (included in other assets on the face of the consolidated balance sheets) 670 762 Other assets 2,486 7,293 Total assets $ 556,285 Liabilities Deposits $ 1,285 $ 438,684 Other borrowings 61 34,613 Accrued expenses and other liabilities 179 6,688 Total liabilities $ 479,985 Total consideration paid $ 76,300 For a description of methods used to determine the fair value of significant assets and liabilities presented on the balance sheet above, see Assumptions section of this Note. The Corporation has purchased loans with the First Staunton acquisition, for which there was, at acquisition, evidence of more than insignificant deterioration of credit quality since origination. The carrying amount of those loans is as follows: ($ in Thousands) February 14, 2020 Purchase price of loans at acquisition $ 77,221 Allowance for credit losses at acquisition 3,504 Non-credit discount/(premium) at acquisition (951) Par value of acquired loans at acquisition $ 79,774 There were no PCD securities. Huntington Wisconsin Branch Acquisition On June 14, 2019, the Corporation completed its acquisition of the Wisconsin branches of Huntington. The Corporation paid a 4% premium on acquired deposits. The conversion of the branches happened simultaneously with the close of the transaction and the acquisition expanded the Bank's presence into 13 new Wisconsin communities. As a result of the acquisition and other consolidations, a net of 14 branch locations were added. The Huntington branch acquisition constituted a business combination. The acquisition has been accounted for using the acquisition method of accounting and, accordingly, assets acquired, liabilities assumed, and consideration exchanged were recorded at estimated fair value on the acquisition date. The determination of estimated fair values required management to make certain estimates that are subjective in nature and may require adjustments upon the availability of new information regarding facts and circumstances which existed at the date of acquisition (i.e., appraisals) for up to a year following the acquisition. The Corporation recorded approximately $7 million in goodwill related to the Huntington branch acquisition during the second quarter of 2019 and approximately $210,000 during the third quarter of 2019. Upon review of information relating to events and circumstances existing at the acquisition date, and in accordance with applicable accounting guidance, the Corporation remeasured select previously reported fair value amounts. The adjustment to goodwill was driven by an update that decreased the fair value of furniture acquired. Goodwill created by the acquisition is tax deductible. See Note 8 for additional information on goodwill. The following table presents the estimated fair values of the assets acquired and liabilities assumed as of the acquisition date related to Huntington branch acquisition: ($ in Thousands) Purchase Accounting Adjustments June 14, 2019 Assets Cash and cash equivalents $ — $ 551,250 Loans (1,552) 116,346 Premises and equipment, net 4,800 22,430 Goodwill 7,286 Core deposit intangibles (included in other intangible assets, net on the face of the consolidated balance sheets) 22,630 22,630 OREO (included in other assets on the face of the consolidated balance sheets) (2,561) 5,263 Other assets — 559 Total assets $ 725,764 Liabilities Deposits $ 156 $ 725,173 Other liabilities 70 590 Total liabilities $ 725,764 Assumptions Investment Securities: The fair value of investments on the date of acquisition was determined utilizing an external third party broker opinion of the market value. Loans: Fair values for loans were based on a discounted cash flow methodology that considered factors including the type of loan and related collateral, classification status, fixed or variable interest rate, term of loan, amortization status and current discount rates. For the non-credit (interest and liquidity) premium, loans were grouped together according to similar characteristics when applying various valuation techniques. For the credit discount, loans were also grouped based on whether they had more than insignificant deterioration in credit since origination. CDIs: This intangible asset represents the value of the relationships with deposit customers. The fair value was estimated based on a discounted cash flow methodology that gave appropriate consideration to expected customer attrition rates, net maintenance cost of the deposit base, alternative cost of funds, and the interest costs associated with customer deposits. The CDIs will be amortized on a straight-line basis over 10 years. Time Deposits: The fair value for time deposits are estimated using a discounted cash flow calculation that applies interest rates currently being offered to the contractual interest rates on such time deposits.

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2020
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies The accounting and reporting policies of the Corporation conform to U.S. GAAP and to general practice within the financial services industry. A discussion of these policies can be found in Note 1 Summary of Significant Accounting Policies included in the Corporation’s 2019 Annual Report on Form 10-K. As a result of adopting ASU 2016-13 Financial Instruments - Credit Losses (Topic 326), there have been changes to the Corporation's significant accounting policies since December 31, 2019, which are described below. Investment Securities Management measures expected credit losses on held to maturity securities on a collective basis by major security type. Accrued interest receivable on held to maturity securities is excluded from the estimate of credit losses. The estimate of expected credit losses considers historical credit loss information that is adjusted for current conditions and reasonable and supportable forecasts and is included in investment securities held to maturity, net on the consolidated balance sheets. For available for sale securities the Corporation evaluates whether any decline in fair value has resulted from credit losses or other factors. In making this assessment, management considers the extent to which fair value is less than amortized cost, any changes to the rating of the security by a rating agency, and adverse conditions specifically related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for credit losses on investments is recorded for the credit loss, limited by the amount that the fair value is less than the amortized cost basis. Any impairment that has not been recorded through an allowance for credit losses on investments is recognized in other comprehensive income. Changes in the allowance for credit losses on investments are recorded as provision for, or reversal of, credit loss expense. Losses are charged against the allowance when management believes the available for sale security is uncollectible or when either of the criteria regarding intent or requirement to sell is met. Accrued interest receivable on available for sale debt securities is excluded from the estimate of credit losses. Allowance for Credit Losses on Loans The level of the allowance for loan losses represents management's estimate of an amount appropriate to provide for lifetime credit losses in the loan portfolio at the balance sheet date. The allocation methodology applied by the Corporation, designed to assess the appropriateness of the allowance for loan losses, includes an allocation methodology, as well as management’s ongoing review and grading of the loan portfolio into criticized loan categories. The allocation methodology focuses on evaluation of several factors, including but not limited to: evaluation of facts and issues related to specific loans, management's ongoing review and grading of the loan portfolio using a dual risk rating system leveraging probability of default and loss given default, consideration of historical credit loss and delinquency experience on each portfolio category, trends in past due and nonaccrual loans, the level of potential problem loans, the risk characteristics of the various classifications of loans, changes in the size and character of the loan portfolio, concentrations of loans to specific borrowers or industries, existing economic conditions and economic forecasts, the fair value of underlying collateral, and other qualitative and quantitative factors which could affect potential loan losses. The Corporation utilizes the Moody's Baseline economic forecast in the allowance model and applies that forecast over a reasonable and supportable period with reversion to historical losses. For additional detail on the reasonable and supportable period and reversion methodology, see Note 7 Loans. Potential problem loans are generally defined by management to include loans rated as substandard by management. Assessing these numerous factors involves significant judgment. The provision for loan losses is predominantly a function of the result of the methodology and other qualitative and quantitative factors used to determine the allowance for loan losses. Management individually analyzes loans that do not share similar risk characteristics to other loans in the portfolio. Management has determined that commercial loan relationships that have nonaccrual status or commercial and retail loans that have had their terms restructured in a TDR meet this definition. Probable TDRs are loans the Corporation has reviewed individually to determine whether there is a high likelihood that the loans will default and will require restructuring in the near future. Probable TDRs could be classified as Pass, Special Mention, Substandard or Nonaccrual within the Corporation's credit quality analysis depending on the specific circumstances surrounding the individual credits. Accrued interest receivable on loans is excluded from the estimate of credit losses. The allowance for unfunded commitments leverages the same methodology utilized to measure the allowance for loan losses. The Corporation estimates expected credit losses over the contractual period in which the Corporation is exposed to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by the Corporation. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded over its estimated life. See Note 7 for additional information on the ACLL and Note 12 for additional information on the allowance for unfunded commitments. Impact of adopting ASU 2016-13 Financial Instruments - Credit Losses (Topic 326) The following table illustrates the adoption impact: December 31, 2019 January 1, 2020 ($ in Thousands) Allowance for Loan Losses Allowance for Unfunded Commitments CECL Day 1 Adjustment ACLL Beginning Balance Commercial and industrial $ 91,133 $ 12,276 $ 48,921 $ 152,330 Commercial real estate - owner occupied 10,284 127 (1,851) 8,560 Commercial and business lending 101,417 12,403 47,070 160,890 Commercial real estate - investor 40,514 530 2,287 43,331 Real estate construction 24,915 7,532 25,814 58,261 Commercial real estate lending 65,428 8,062 28,101 101,591 Total Commercial 166,846 20,465 75,171 262,482 Residential mortgage 16,960 — 33,215 50,175 Home equity 10,926 1,038 14,240 26,204 Other consumer 6,639 405 8,520 15,564 Total consumer 34,525 1,443 55,975 91,943 Total loans $ 201,371 $ 21,907 $ 131,147 $ 354,425 The allowance for credit losses on held to maturity securities was approximately $61,000 at January 1, 2020, attributable entirely to the Corporation's municipal securities. At January 1, 2020, the adoption of ASU 2016-13 resulted in an increase to the allowance for loan losses of $112 million and an increase to the allowance for unfunded commitments of $19 million for a total increase to the ACLL of $131 million. A corresponding after tax decrease to common equity of $98 million was recorded along with a deferred tax asset of $33 million. New Accounting Pronouncements Adopted Standard Description Date of adoption Effect on financial statements ASU 2016-13 Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments The FASB issued an amendment to replace the current incurred loss impairment methodology. Under the new guidance, entities will be required to measure expected credit losses by utilizing forward-looking information to assess an entity's ACL. The guidance also requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The measurement of expected credit losses is based on relevant information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. An entity must use judgment in determining the relevant information and estimation methods that are appropriate in its circumstances. This amendment was effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Entities should apply the amendment by means of a cumulative-effect adjustment to retained earnings as of the beginning of the fiscal year of adoption. ASU 2018-19 was issued to clarify that receivables arising from operating leases are not within the scope of Subtopic 326-20. Instead, impairment of receivables arising from operating leases should be accounted for in accordance with Topic 842, Leases. ASU 2019-04 was issued and provides entities alternatives for measurement of accrued interest receivable, clarifies the steps entities should take when recording the transfer of loans or debt securities between measurement classifications or categories and clarifies that entities should include expected recoveries on financial assets. ASU 2019-05 was issued to provide entities that have certain instruments within the scope of Subtopic 320-20 with an option to irrevocably elect the fair value option in Subtopic 825-10. ASU 2020-02 was issued to further explain the measurement of current expected credit losses and the development, governance, and documentation of a systematic methodology. Early adoption was permitted. 1st Quarter 2020 The Corporation has adopted the Update using a modified retrospective approach. The Corporation has developed a CECL allowance model which calculates reserves over the life of the loan and is largely driven by portfolio characteristics, risk-grading, economic outlook, and key methodology assumptions. Those assumptions are based upon the existing probability of default and loss given default framework. At adoption, the Corporation utilized a single economic forecast over a 2-year reasonable and supportable forecast period. In the second year, the Corporation used straight-line reversion to historical losses. The Corporation recorded a $131 million adjustment to the ACL related to the adoption of this standard, which includes $61 thousand related to the held to maturity investment securities portfolio. The Corporation has elected to maintain pools accounted for under Subtopic 310-30 at adoption. The Corporation has elected to utilize the 2019 Capital Transition Relief for initial adoption, as well as the 2020 Capital Transition Relief as permitted under applicable regulations. The total impact at adoption equates to an approximately 29 bp net, after tax, reduction in the tangible common equity ratio. Results for the periods after January 1, 2020 are presented in accordance with ASC 326 while prior period amounts continue to be reported in accordance with previously applicable standards. Standard Description Date of adoption Effect on financial statements ASU 2018-13 Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement The FASB issued an amendment to add, modify, and remove disclosure requirements on fair value measurements in Topic 820, Fair Value Measurement, based on the FASB Concepts Statement "Conceptual Framework for Financial Reporting," including the consideration of costs and benefits. The amendment is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. The amendments on changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements, and the narrative description of measurement uncertainty should be applied prospectively for only the most recent interim or annual period presented in the initial fiscal year of adoption. All other amendments should be applied retrospectively to all periods presented upon their effective date. Early adoption was permitted. 1st Quarter 2020 The Corporation has evaluated and determined it has an immaterial impact with minor changes in presentation. ASU 2017-04 Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment The FASB issued an amendment to simplify the subsequent quantitative measurement of goodwill by eliminating step two from the goodwill impairment test. Instead, an entity will perform only step one of its quantitative goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount, and then recognizing an impairment charge for the amount by which the carrying amount exceeds the reporting unit's fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. An entity will still have the option to perform a qualitative assessment for a reporting unit to determine if the quantitative step one impairment test is necessary. This amendment is effective for annual or interim goodwill impairment tests in fiscal years beginning after December 15, 2019. Entities should apply the amendment prospectively. Early adoption is permitted, including in an interim period, for impairment tests performed after January 1, 2017. 1st Quarter 2020 There has been no material impact on results of operations, financial position, and liquidity. The Corporation does its annual impairment testing in May. ASU 2020-03 Codification Improvements to Financial Instruments The FASB issued an amendment to further clarify that all entities are required to provide the fair value option disclosures in paragraphs 825-10-50-24 through 50-32. The amendment also states that paragraphs 820-10-35-2A(g) and 820-10-35-18L are to include the phrase nonfinancial items accounted for as derivatives under Topic 815 to be consistent with the previous amendments to Section 820-10-35 that were made by ASU No. 2018-09, Codification Improvements. The amendment also clarifies that the disclosure requirements in Topic 320 apply to the disclosure requirements in Topic 942 for depository and lending institutions along with improving the understandability of the guidance relating to subtopic 470-50 and subtopic 820-10. Lastly, the amendment clarifies that the contractual term of a net investment in a lease determined in accordance with Topic 842 should be the contractual term used to measure expected credit losses under Topic 326 and that when an entity regains control of financial assets sold, an ACL should be recorded in accordance with Topic 326. 1st Quarter 2020 The Corporation has evaluated and determined it has an immaterial impact. ASU 2020-04 Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting The FASB issued an amendment to provide optional expedients and exceptions for applying GAAP to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. The amendment only applies to contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. The expedients and exceptions provided by the amendments do not apply to contract modifications made and hedging relationships entered into or evaluated after December 31, 2022, except for hedging relationships existing as of December 31, 2022, that an entity has elected certain optional expedients for and that are retained through the end of the hedging relationship. 1st Quarter 2020 The Corporation has evaluated the impact of the Update and determined the expedients provided allow for simpler, more streamlined modifications to the financial instruments referencing LIBOR. A small population of loans have been modified under the new standard. Future Accounting Pronouncements The expected impact of accounting pronouncements recently issued or proposed but not yet required to be adopted are displayed in the table below: Standard Description Date of anticipated adoption Effect on financial statements ASU 2018-14 The FASB issued an amendment to modify the disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. The amendments also added requirements to disclose the weighted-average interest crediting rates for cash balance plans and other plans with promised interest crediting rates and an explanation of the reasons for significant gains and losses related to changes in the benefit obligation for the period. The amendment also clarifies the disclosure requirements in paragraph 715-20-50-3, which states that certain information for defined benefit pension plans should be disclosed. The amendments in this Update remove disclosures that no longer are considered cost beneficial, clarify the specific requirements of disclosures, and add disclosure requirements identified as relevant. The amendment is effective for fiscal years ending after December 15, 2020. Entities should apply the amendments in this Update on a retrospective basis to all periods presented. Early adoption is permitted. 1st Quarter 2021 The Corporation is currently evaluating the impact on its results of operations, financial position, and liquidity. ASU 2020-01 Investments-Equity Securities (Topic 321), Investments-Equity Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815) The FASB issued an amendment to clarify the interaction of the accounting for equity securities under Topic 321 and investments accounted for under the equity method of accounting in Topic 323 and the accounting for certain forward contracts and purchased options accounted for under Topic 815. The amendments clarify that an entity should consider observable transactions that require it to either apply or discontinue the equity method of accounting for the purposes of applying the measurement alternative in accordance with Topic 321 immediately before applying or upon discontinuing the equity method. The amendments also clarify that for the purpose of applying paragraph 815-10-15-141(a) an entity should not consider whether, upon the settlement of the forward contract or exercise of the purchased option, individually or with existing investments, the underlying securities would be accounted for under the equity method in Topic 323 or the fair value option in accordance with the financial instruments guidance in Topic 825. An entity also would evaluate the remaining characteristics in paragraph 815-010-15-141 to determine the accounting for those forward contracts and purchased options. 1st Quarter 2021 The Corporation is currently evaluating the impact on its results of operations, financial position, and liquidity.

Earnings Per Common Share

Earnings Per Common Share	3 Months Ended
	Mar. 31, 2020
Earnings Per Share [Abstract]
Earnings Per Common Share	Earnings Per Common Share Earnings per common share are calculated utilizing the two-class method. Basic earnings per common share are calculated by dividing the sum of distributed earnings to common shareholders and undistributed earnings allocated to common shareholders by the weighted average number of common shares outstanding. Diluted earnings per common share are calculated by dividing the sum of distributed earnings to common shareholders and undistributed earnings allocated to common shareholders by the weighted average number of common shares outstanding adjusted for the dilutive effect of common stock awards (outstanding stock options and unvested restricted stock awards). Presented below are the calculations for basic and diluted earnings per common share: Three Months Ended March 31, (In Thousands, except per share data) 2020 2019 Net income $ 45,838 $ 86,686 Preferred stock dividends (3,801) (3,801) Net income available to common equity 42,037 82,885 Common shareholder dividends (28,264) (28,080) Unvested share-based payment awards (128) (103) Undistributed earnings $ 13,645 $ 54,702 Undistributed earnings allocated to common shareholders $ 13,555 $ 54,410 Undistributed earnings allocated to unvested share-based payment awards 90 292 Undistributed earnings $ 13,645 $ 54,702 Basic Distributed earnings to common shareholders $ 28,264 $ 28,080 Undistributed earnings allocated to common shareholders 13,555 54,410 Total common shareholders earnings, basic $ 41,819 $ 82,490 Diluted Distributed earnings to common shareholders $ 28,264 $ 28,080 Undistributed earnings allocated to common shareholders 13,555 54,410 Total common shareholders earnings, diluted $ 41,819 $ 82,490 Weighted average common shares outstanding 154,701 163,928 Effect of dilutive common stock awards 918 1,505 Diluted weighted average common shares outstanding 155,619 165,433 Basic earnings per common share $ 0.27 $ 0.50 Diluted earnings per common share $ 0.27 $ 0.50 Non-dilutive common stock options of approximately 4 million and 3 million for the three months ended March 31, 2020 and 2019, respectively, were excluded from the earnings per common share calculation.

Stock-Based Compensation

Stock-Based Compensation	3 Months Ended
	Mar. 31, 2020
Retirement Benefits [Abstract]
Stock-Based Compensation	Stock-Based Compensation The fair value of stock options granted is estimated on the date of grant using a Black-Scholes option pricing model, while the fair value of restricted stock awards is their fair market value on the date of grant. The fair values of stock options and restricted stock awards are amortized as compensation expense on a straight-line basis over the vesting period of the grants. For retirement eligible colleagues, whose employment meets the definitions under the 2017 Incentive Compensation Plan, expenses related to stock options and restricted stock awards are fully recognized on the date the colleague meets the definition of normal or early retirement. Compensation expense recognized is included in personnel expense on the consolidated statements of income. Assumptions are used in estimating the fair value of stock options granted. The weighted average expected life of the stock option represents the period of time stock options are expected to be outstanding and is estimated using historical data of stock option exercises and forfeitures. The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant. The expected volatility is based on the implied volatility of the Corporation’s stock. The following assumptions were used in estimating the fair value for options granted in the first three months of 2020 and full year 2019: 2020 2019 Dividend yield 3.50 % 3.30 % Risk-free interest rate 1.60 % 2.60 % Weighted average expected volatility 21.00 % 24.00 % Weighted average expected life 5.75 years 5.75 years Weighted average per share fair value of options $2.39 $4.00 A summary of the Corporation’s stock option activity for the three months ended March 31, 2020 is presented below: Stock Options Shares (a) Weighted Average Weighted Average Remaining Contractual Term Aggregate Intrinsic Value (a) Outstanding at December 31, 2019 5,543 $ 20.13 6.25 years $ 16,043 Granted 1,697 18.43 Exercised (102) 13.98 Forfeited or expired (159) 22.52 Outstanding at March 31, 2020 6,978 $ 19.75 6.96 years $ 19 Options Exercisable at March 31, 2020 4,090 $ 19.15 5.37 years $ 19 (a) In thousands Intrinsic value represents the amount by which the fair market value of the underlying stock exceeds the exercise price of the stock option. For the three months ended March 31, 2020, the intrinsic value of stock options exercised was less than $1 million compared to $2 million for the three months ended March 31, 2019. The total fair value of stock options vested was $3 million for the three months ended March 31, 2020, compared to $4 million for the three months ended March 31, 2019. The Corporation recognized compensation expense for the vesting of stock options of $2 million for the three months ended March 31, 2020 and $1 million for the three months ended March 31, 2019. Included in compensation expense for 2020 was less than $1 million of expense for the accelerated vesting of stock options granted to retirement eligible colleagues. At March 31, 2020, the Corporation had approximately $6 million of unrecognized compensation expense related to stock options that is expected to be recognized over the remaining requisite service periods that extend through the first quarter of 2024 . The Corporation also issues restricted stock awards under the 2017 Incentive Compensation Plan. Performance awards are based on performance goals of earnings per share and total shareholder return with vesting ranging from a minimum of 0% to a maximum of 150% of the target award. Performance awards are valued utilizing a Monte Carlo simulation model to estimate fair value of the awards at the grant date. The following table summarizes information about the Corporation’s restricted stock awards activity for the three months ended March 31, 2020: Restricted Stock Awards Shares (a) Weighted Average Outstanding at December 31, 2019 2,393 $ 22.39 Granted 1,018 18.54 Vested (752) 23.33 Forfeited (61) 23.12 Outstanding at March 31, 2020 2,598 $ 20.59 (a) In thousands The Corporation amortizes the expense related to restricted stock awards as compensation expense over the vesting period specified in the grant's award agreement. Performance-based restricted stock awards granted during 2019 and 2020 will vest ratably over a period of three years. Service-based restricted stock awards granted during 2019 and 2020 will vest ratably over a period of four years. Expense for restricted stock awards issued of approximately $9 million was recorded for the three months ended March 31, 2020 and $8 million was recorded for the three months ended March 31, 2019. Included in compensation expense for the first three months of 2020 was approximately $2 million of expense for the accelerated vesting of restricted stock awards granted to retirement eligible colleagues. The Corporation had $27 million of unrecognized compensation costs related to restricted stock awards at March 31, 2020 that are expected to be recognized over the remaining requisite service periods that extend through the first quarter of 2024. The Corporation has the ability to issue shares from treasury or new shares upon the exercise of stock options or the granting of restricted stock awards. The Board of Directors has authorized management to repurchase shares of the Corporation’s common

Investment Securities

Investment Securities	3 Months Ended
	Mar. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Investment Securities Investment securities are classified as available for sale, held to maturity, or equity on the consolidated balance sheets at the time of purchase. The amortized cost and fair values of securities available for sale and held to maturity at March 31, 2020 were as follows: ($ in Thousands) Amortized Gross Gross Fair Value Investment securities available for sale U.S. government SBA agency securities $ 10,241 $ 2 $ (5) $ 10,238 Obligations of state and political subdivisions (municipal securities) 492,195 16,443 (1) 508,636 Residential mortgage-related securities FNMA / FHLMC 103,576 908 — 104,485 GNMA 799,983 23,804 — 823,787 Commercial mortgage-related securities FNMA / FHLMC 19,861 2,912 — 22,773 GNMA 1,108,336 10,162 (4,055) 1,114,443 FFELP asset backed securities 360,658 — (19,234) 341,424 Other debt securities 3,000 — — 3,000 Total investment securities available for sale $ 2,897,851 $ 54,231 $ (23,295) $ 2,928,787 Investment securities held to maturity U. S. Treasury securities $ 999 $ 42 $ — $ 1,041 Obligations of state and political subdivisions (municipal securities) 1,426,543 82,382 (475) 1,508,451 Residential mortgage-related securities FNMA / FHLMC 78,125 3,486 — 81,610 GNMA 245,675 8,124 — 253,799 GNMA commercial mortgage-related securities 398,092 6,500 (1,939) 402,653 Total investment securities held to maturity $ 2,149,434 $ 100,534 $ (2,414) $ 2,247,553 The amortized cost and fair values of securities available for sale and held to maturity at December 31, 2019 were as follows: ($ in Thousands) Amortized Gross Gross Fair Value Investment securities available for sale Obligations of state and political subdivisions (municipal securities) $ 529,908 $ 16,269 $ (18) $ 546,160 Residential mortgage-related securities FNMA / FHLMC 131,158 1,562 (59) 132,660 GNMA 982,941 3,887 (1,689) 985,139 Commercial mortgage-related securities FNMA / FHLMC 19,929 1,799 — 21,728 GNMA 1,314,836 7,403 (12,032) 1,310,207 FFELP asset backed securities 270,178 — (6,485) 263,693 Other debt securities 3,000 — — 3,000 Total investment securities available for sale $ 3,251,950 $ 30,920 $ (20,284) $ 3,262,586 Investment securities held to maturity U. S. Treasury securities $ 999 $ 19 $ — $ 1,018 Obligations of state and political subdivisions (municipal securities) 1,418,569 69,775 (1,118) 1,487,227 Residential mortgage-related securities FNMA / FHLMC 81,676 1,759 (15) 83,420 GNMA 269,523 1,882 (1,108) 270,296 GNMA commercial mortgage-related securities 434,317 6,308 (6,122) 434,503 Total investment securities held to maturity $ 2,205,083 $ 79,744 $ (8,363) $ 2,276,465 Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. The expected maturities of investment securities available for sale and held to maturity at March 31, 2020 are shown below: Available for Sale Held to Maturity ($ in Thousands) Amortized Fair Amortized Fair Due in one year or less $ 10,731 $ 10,738 $ 32,555 $ 32,703 Due after one year through five years 30,829 31,242 77,586 78,683 Due after five years through ten years 324,501 334,499 153,519 158,843 Due after ten years 129,134 135,157 1,163,883 1,239,262 Total debt securities 495,195 511,636 1,427,542 1,509,492 U.S. government SBA agency securities 10,241 10,238 — — Residential mortgage-related securities FNMA / FHLMC 103,576 104,485 78,125 81,610 GNMA 799,983 823,787 245,675 253,799 Commercial mortgage-related securities FNMA / FHLMC 19,861 22,773 — — GNMA 1,108,336 1,114,443 398,092 402,653 FFELP asset backed securities 360,658 341,424 — — Total investment securities $ 2,897,851 $ 2,928,787 $ 2,149,434 $ 2,247,553 Ratio of fair value to amortized cost 101.1 % 104.6 % On a quarterly basis, the Corporation refreshes credit quality of each held to maturity security. The following table summarizes the credit quality indicator of held to maturity securities at amortized cost at March 31, 2020: ($ in Thousands) AAA AA A Total U. S. Treasury securities $ 999 $ — $ — $ 999 Obligations of state and political subdivisions (municipal securities) 543,620 862,040 20,883 1,426,543 Residential mortgage-related securities FNMA/FHLMC 78,125 — — 78,125 GNMA 245,675 — — 245,675 GNMA commercial mortgage-related securities 398,092 — — 398,092 Total held to maturity securities $ 1,266,510 $ 862,040 $ 20,883 $ 2,149,434 Investment securities gains (losses), net includes proceeds from the sale of investment securities as well as any applicable write-ups or write-downs of investment securities. The proceeds from the sale of investment securities for the three months ended March 31, 2020 and 2019 are shown below: Three Months Ended March 31, ($ in Thousands) 2020 2019 Gross gains on available for sale securities $ 6,198 $ 1,680 Gross gains on held to maturity securities — — Total gains 6,198 1,680 Gross (losses) on available for sale securities (80) — Gross (losses) on held to maturity securities — — Total (losses) (80) — Investment securities gains (losses), net $ 6,118 $ 1,680 Proceeds from sales of investment securities $ 365,239 $ 131,122 During the first quarter of 2020, the Corporation sold $281 million of primarily prepayment sensitive mortgage-related securities at a gain of $6 million. Additionally, in February 2020, the Corporation sold $84 million of certain securities acquired in the First Staunton acquisition that did not fit the parameters of the Corporation's current investment strategy. During the first quarter of 2019, the Corporation sold $131 million of taxable ABS, MBS, and CMO securities, with the proceeds utilized to pay down borrowings. Investment securities with a carrying value of approximately $2.1 billion and $2.6 billion at March 31, 2020 and December 31, 2019, respectively, were pledged to secure certain deposits or for other purposes as required or permitted by law. At March 31, 2020, accrued interest receivable on held to maturity and available for sale securities totaled $14 million and $10 million, respectively, both which are included in interest receivable on the consolidated balance sheets. There was no interest income reversed for investments going into nonaccrual. A security is considered past due once it is 30 days contractually past due under the terms of the agreement. At March 31, 2020, the Corporation had no past due held to maturity securities. The allowance for credit losses on held to maturity securities was approximately $61,000 at March 31, 2020, attributable entirely to the Corporation's municipal securities, included in investment securities held to maturity, net, at amortized cost on the consolidated balance sheets. The Corporation also holds U.S. Treasury and residential mortgage-related securities issued by the U.S. government or a GSE which are backed by the full faith and credit of the U.S. government and, as a result, no allowance for credit losses has been recorded related to these securities. The following represents gross unrealized losses and the related fair value of investment securities available for sale and held to maturity, aggregated by investment category and length of time individual securities have been in a continuous unrealized loss position, at March 31, 2020: Less than 12 months 12 months or more Total ($ in Thousands) Number Unrealized Fair Number Unrealized Fair Unrealized Fair Investment securities available for sale U.S. government SBA agency securities 7 $ (5) $ 4,958 — $ — $ — $ (5) $ 4,958 Obligations of state and political subdivisions (municipal securities) 5 (1) 1,313 — — — (1) 1,313 GNMA commercial mortgage-related securities 22 (1,111) 259,273 8 (2,944) 138,611 (4,055) 397,883 FFELP asset backed securities 16 (10,971) 222,197 10 (8,262) 119,228 (19,234) 341,424 Other debt securities 2 — 2,000 — — — — 2,000 Total 52 $ (12,089) $ 489,740 18 $ (11,206) $ 257,838 $ (23,295) $ 747,578 Investment securities held to maturity Obligations of state and political subdivisions (municipal securities) 22 $ (470) $ 28,779 3 $ (5) $ 542 $ (475) $ 29,321 Residential mortgage-related securities FNMA / FHLMC 1 — — — — — — — GNMA commercial mortgage-related securities 8 (332) 126,170 7 (1,607) 126,624 (1,939) 252,794 Total 31 $ (802) $ 154,950 10 $ (1,612) $ 127,166 $ (2,414) $ 282,116 For comparative purposes, the following represents gross unrealized losses and the related fair value of investment securities available for sale and held to maturity, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at December 31, 2019: Less than 12 months 12 months or more Total ($ in Thousands) Number Unrealized Fair Number Unrealized Fair Unrealized Fair Investment securities available for sale Obligations of state and political subdivisions (municipal securities) 4 $ (18) $ 1,225 — $ — $ — $ (18) $ 1,225 Residential mortgage-related securities FNMA / FHLMC — — — 4 (59) 34,807 (59) 34,807 GNMA 18 (924) 322,394 3 (766) 79,461 (1,689) 401,856 GNMA commercial mortgage-related securities 22 (810) 258,218 42 (11,222) 621,307 (12,032) 879,524 FFELP asset backed securities 19 (6,092) 250,780 2 (393) 12,913 (6,485) 263,693 Other debt securities 2 — 2,000 — — — — 2,000 Total 65 $ (7,843) $ 834,616 51 $ (12,440) $ 748,487 $ (20,284) $ 1,583,104 Investment securities held to maturity Obligations of state and political subdivisions (municipal securities) 52 $ (1,105) $ 77,562 6 $ (13) $ 2,378 $ (1,118) $ 79,940 Residential mortgage-related securities FNMA / FHLMC 1 (6) 1,242 1 (9) 833 (15) 2,075 GNMA 12 (1,059) 187,261 8 (49) 6,587 (1,108) 193,849 GNMA commercial mortgage-related securities 2 (29) 26,202 21 (6,093) 357,733 (6,122) 383,935 Total 67 $ (2,199) $ 292,267 36 $ (6,164) $ 367,532 $ (8,363) $ 659,799 The Corporation reviews the available for sale investment securities portfolio on a quarterly basis to monitor its credit exposure. A determination as to whether a security’s decline in fair value is the result of credit risk takes into consideration numerous factors and the relative significance of any single factor can vary by security. Some factors the Corporation may consider in the impairment analysis includes the extent to which the security has been in an unrealized loss position, the change in security rating, financial condition and near-term prospects of the issuer, as well as the security and industry specific economic conditions. Based on the Corporation’s evaluation, management does not believe any available for sale securities in an unrealized loss position at March 31, 2020 represent credit deterioration as these unrealized losses are primarily attributable to changes in interest rates and the current market conditions. The unrealized losses reported for municipal securities at March 31, 2020 pertain to various state and local political subdivisions and school districts, and have declined due to the decrease in overall interest rates. The unrealized losses at March 31, 2020 for mortgage-related securities have also declined due to the decrease in overall interest rates. The U.S. Treasury 3 year and 5 year rates decreased by 133 bp and 132 bp, respectively, from December 31, 2019. The Corporation does not intend to sell nor does it believe that it will be required to sell the securities in an unrealized loss position before recovery of their amortized cost basis. FHLB and Federal Reserve Bank stocks: The Corporation is required to maintain Federal Reserve Bank stock and FHLB stock as a member of both the Federal Reserve System and the FHLB, and in amounts as required by these institutions. These equity securities are “restricted” in that they can only be sold back to the respective institutions or another member institution at par. Therefore, they are less liquid than other marketable equity securities and their fair value is equal to amortized cost. At March 31, 2020 and December 31, 2019, the Corporation had FHLB stock of $145 million and $149 million, respectively. The Corporation had Federal Reserve Bank stock of $78 million at both March 31, 2020 and December 31, 2019. Equity Securities Equity securities with readily determinable fair values: The Corporation's portfolio of equity securities with readily determinable fair values is primarily comprised of CRA Qualified Investment mutual funds. At both March 31, 2020 and December 31, 2019, the Corporation had equity securities with readily determinable fair values of $2 million.

Loans

Loans	3 Months Ended
	Mar. 31, 2020
Receivables [Abstract]
Loans	Loans The period end loan composition was as follows: ($ in Thousands) March 31, 2020 December 31, 2019 Commercial and industrial $ 8,517,974 $ 7,354,594 Commercial real estate — owner occupied 940,687 911,265 Commercial and business lending 9,458,661 8,265,858 Commercial real estate — investor 4,038,036 3,794,517 Real estate construction 1,544,858 1,420,900 Commercial real estate lending 5,582,894 5,215,417 Total commercial 15,041,555 13,481,275 Residential mortgage 8,132,417 8,136,980 Home equity 844,901 852,025 Other consumer 346,761 351,159 Total consumer 9,324,079 9,340,164 Total loans (a) $ 24,365,633 $ 22,821,440 (a) During the first quarter of 2020, the Corporation transferred $200 million of portfolio residential mortgages to residential loans held for sale, which are not included in total loans. Accrued interest receivable on loans totaled $66 million at March 31, 2020, included in interest receivable on the consolidated balance sheets. Interest accrued but not received for loans placed on nonaccrual is reversed against interest income. The amount of accrued interest reversed totaled approximately $327,000 for the period ended March 31, 2020. The following table presents commercial and consumer loans by credit quality indicator by vintage year at March 31, 2020: Term Loans Amortized Cost Basis by Origination Year (a) ($ in Thousands) Rev Loans Converted to Term (a) Rev Loans Amortized Cost Basis YTD 2020 2019 2018 2017 2016 Prior Total Commercial and industrial: Risk rating: Pass $ 777 $ 2,027,795 $ 665,843 $ 1,943,817 $ 1,770,838 $ 846,057 $ 392,996 $ 598,104 $ 8,245,450 Special Mention — 26,674 5,570 17,726 5,255 1,260 7,287 151 63,922 Potential Problem (b) 685 60,784 134 2,430 21,030 53,915 9,053 2,401 149,747 Nonaccrual (c) — — 231 7,200 550 16,171 17,532 17,171 58,854 Commercial and industrial $ 1,462 $ 2,115,253 $ 671,779 $ 1,971,173 $ 1,797,672 $ 917,402 $ 426,869 $ 617,827 $ 8,517,974 Commercial real estate - owner occupied: Risk rating: Pass $ — $ 45,423 $ 33,107 $ 220,821 $ 141,652 $ 133,631 $ 160,435 $ 150,188 $ 885,257 Special Mention — 86 — 16,438 15,143 139 662 5,321 37,789 Potential Problem — 230 100 780 1,173 1,463 9,930 2,126 15,802 Nonaccrual — — — — 88 343 — 1,407 1,838 Commercial real estate - owner occupied $ — $ 45,739 $ 33,207 $ 238,039 $ 158,056 $ 135,576 $ 171,026 $ 159,043 $ 940,687 Commercial and business lending: Risk rating: Pass $ 777 $ 2,073,218 $ 698,951 $ 2,164,638 $ 1,912,490 $ 979,688 $ 553,431 $ 748,292 $ 9,130,708 Special Mention — 26,760 5,570 34,163 20,398 1,399 7,949 5,472 101,711 Potential Problem (b) 685 61,014 234 3,211 22,204 55,378 18,983 4,527 165,550 Nonaccrual (c) — — 231 7,200 637 16,514 17,532 18,578 60,692 Commercial and business lending $ 1,462 $ 2,160,992 $ 704,986 $ 2,209,212 $ 1,955,729 $ 1,052,978 $ 597,895 $ 776,869 $ 9,458,661 Commercial real estate - investor: Risk rating: Pass $ — $ 206,640 $ 499,631 $ 1,253,538 $ 820,547 $ 348,738 $ 405,718 $ 344,191 $ 3,879,003 Special Mention — — — 33,440 15,128 15,239 31,581 1,525 96,913 Potential Problem — 1,157 20 30,714 3,329 283 12,792 12,734 61,030 Nonaccrual — 446 570 — — — — 75 1,091 Commercial real estate - investor $ — $ 208,244 $ 500,221 $ 1,317,691 $ 839,004 $ 364,261 $ 450,091 $ 358,524 $ 4,038,036 Real estate construction: Risk rating: Pass $ — $ 80,118 $ 121,768 $ 708,726 $ 438,100 $ 146,967 $ 3,331 $ 25,389 $ 1,524,400 Special Mention — — — — 18,203 — — 16 18,219 Potential Problem — — — 148 — 1,557 — 48 1,753 Nonaccrual — — — — — — — 486 486 Real estate construction $ — $ 80,118 $ 121,768 $ 708,875 $ 456,303 $ 148,523 $ 3,331 $ 25,939 $ 1,544,858 Commercial real estate lending: Risk rating: Pass $ — $ 286,759 $ 621,399 $ 1,962,264 $ 1,258,647 $ 495,705 $ 409,049 $ 369,580 $ 5,403,403 Special Mention — — — 33,440 33,331 15,239 31,581 1,540 115,132 Potential Problem — 1,157 20 30,862 3,329 1,840 12,792 12,782 62,783 Nonaccrual — 446 570 — — — — 560 1,577 Commercial real estate lending $ — $ 288,362 $ 621,990 $ 2,026,565 $ 1,295,307 $ 512,784 $ 453,422 $ 384,463 $ 5,582,894 Total commercial: Risk rating: Pass $ 777 $ 2,359,976 $ 1,320,350 $ 4,126,902 $ 3,171,136 $ 1,475,393 $ 962,480 $ 1,117,872 $ 14,534,111 Special Mention — 26,760 5,570 67,603 53,729 16,638 39,530 7,013 216,843 Potential Problem 685 62,171 255 34,073 25,532 57,217 31,775 17,309 228,333 Nonaccrual — 446 801 7,200 637 16,514 17,532 19,138 62,269 Total commercial $ 1,462 $ 2,449,354 $ 1,326,976 $ 4,235,777 $ 3,251,035 $ 1,565,762 $ 1,051,317 $ 1,161,333 $ 15,041,555 Term Loans Amortized Cost Basis by Origination Year (a) ($ in Thousands) Rev Loans Converted to Term (a) Rev Loans Amortized Cost Basis YTD 2020 2019 2018 2017 2016 Prior Total Residential mortgage: Risk rating: Pass $ — $ 92 $ 352,107 $ 1,815,240 $ 874,080 $ 1,474,788 $ 1,321,163 $ 2,226,104 $ 8,063,574 Special Mention — — — — 37 22 36 572 667 Potential Problem — — — 587 36 992 432 1,274 3,322 Nonaccrual — — 619 3,802 5,422 8,949 12,678 33,385 64,855 Residential mortgage $ — $ 92 $ 352,726 $ 1,819,630 $ 879,575 $ 1,484,752 $ 1,334,308 $ 2,261,335 $ 8,132,417 Home equity: Risk rating: Pass $ 6,286 $ 738,938 $ 223 $ 1,626 $ 1,869 $ 2,374 $ 2,748 $ 83,567 $ 831,344 Special Mention 102 1,262 65 39 91 50 97 338 1,942 Potential Problem — 2,045 — — 46 — — 146 2,238 Nonaccrual 221 916 128 224 284 383 180 7,263 9,378 Home equity $ 6,609 $ 743,161 $ 417 $ 1,888 $ 2,290 $ 2,807 $ 3,025 $ 91,314 $ 844,901 Other consumer: Risk rating: Pass $ 62 $ 184,495 $ 2,874 $ 16,037 $ 6,843 $ 3,213 $ 2,369 $ 130,073 $ 345,904 Special Mention 4 559 — 1 — — 78 4 642 Potential Problem — — — — — — — — — Nonaccrual 8 119 — 34 — 10 — 52 215 Other consumer $ 75 $ 185,173 $ 2,874 $ 16,072 $ 6,843 $ 3,223 $ 2,447 $ 130,129 $ 346,761 Total consumer: Risk rating: Pass $ 6,348 $ 923,525 $ 355,204 $ 1,832,904 $ 882,791 $ 1,480,375 $ 1,326,279 $ 2,439,744 $ 9,240,821 Special Mention 106 1,821 65 40 128 71 212 914 3,251 Potential Problem — 2,045 — 587 83 992 432 1,420 5,559 Nonaccrual 229 1,036 748 4,060 5,706 9,342 12,857 40,700 74,448 Total consumer $ 6,683 $ 928,426 $ 356,017 $ 1,837,590 $ 888,708 $ 1,490,781 $ 1,339,780 $ 2,482,777 $ 9,324,079 Total loans: Risk rating: Pass $ 7,125 $ 3,283,501 $ 1,675,554 $ 5,959,806 $ 4,053,928 $ 2,955,768 $ 2,288,760 $ 3,557,616 $ 23,774,932 Special Mention 106 28,581 5,635 67,642 53,857 16,710 39,741 7,927 220,093 Potential Problem 685 64,216 255 34,660 25,615 58,210 32,207 18,729 233,892 Nonaccrual 229 1,482 1,549 11,260 6,343 25,856 30,390 59,838 136,717 Total loans $ 8,145 $ 3,377,780 $ 1,682,992 $ 6,073,368 $ 4,139,743 $ 3,056,543 $ 2,391,098 $ 3,644,110 $ 24,365,633 (a) Revolving loans converted to term loans are also reported in their year of origination (b) Includes $67 million of oil and gas related loans (c) Includes $29 million of oil and gas related loans The following table presents commercial and consumer loans by credit quality indicator at December 31, 2019 : ($ in Thousands) Pass Special Mention Potential Problem Nonaccrual Total Commercial and industrial $ 7,118,448 $ 79,525 $ 110,308 $ 46,312 $ 7,354,594 Commercial real estate - owner occupied 866,193 25,115 19,889 67 911,265 Commercial and business lending 7,984,641 104,641 130,197 46,380 8,265,858 Commercial real estate - investor 3,620,785 139,873 29,449 4,409 3,794,517 Real estate construction 1,420,374 33 — 493 1,420,900 Commercial real estate lending 5,041,159 139,906 29,449 4,902 5,215,417 Total commercial 13,025,800 244,547 159,646 51,282 13,481,275 Residential mortgage 8,077,122 563 1,451 57,844 8,136,980 Home equity 841,757 1,164 — 9,104 852,025 Other consumer 350,260 748 — 152 351,159 Total consumer 9,269,139 2,475 1,451 67,099 9,340,164 Total loans $ 22,294,939 $ 247,022 $ 161,097 $ 118,380 $ 22,821,440 Factors that are important to managing overall credit quality are sound loan underwriting and administration, systematic monitoring of existing loans and commitments, effective loan review on an ongoing basis, early identification of potential problems, and appropriate allowance for loan losses, allowance for unfunded commitments, nonaccrual, and charge off policies. For commercial loans, management has determined the pass credit quality indicator to include credits exhibiting acceptable financial statements, cash flow, and leverage. If any risk exists, it is mitigated by the loan structure, collateral, monitoring, or control. For consumer loans, performing loans include credits performing in accordance with the original contractual terms. Loans are considered past due if the required principal and interest payments have not been received as of the date such payments were due. Special mention credits have potential weaknesses that deserve management’s attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the credit. Potential problem loans are considered inadequately protected by the current net worth and paying capacity of the obligor or the collateral pledged. These loans generally have a well-defined weakness, or weaknesses, which may jeopardize liquidation of the debt, and are characterized by the distinct possibility the Corporation will sustain some loss if the deficiencies are not corrected. Management has determined commercial loan relationships in nonaccrual status and commercial and consumer loan relationships with their terms restructured in a TDR meet the criteria to be individually evaluated. Commercial loans classified as special mention, potential problem, and nonaccrual are reviewed at a minimum on a quarterly basis, while pass and performing rated credits are generally reviewed on an annual basis or more frequently if the loan renewal is less than one year or if otherwise warranted. The following table presents loans by past due status at March 31, 2020: Accruing ($ in Thousands) Current 30-59 Days 60-89 Days 90 Days or Nonaccrual (a)(b) Total Commercial and industrial $ 8,457,708 $ 508 $ 468 $ 436 $ 58,854 $ 8,517,974 Commercial real estate - owner occupied 938,798 51 — — 1,838 940,687 Commercial and business lending 9,396,506 558 468 436 60,692 9,458,661 Commercial real estate - investor 4,022,482 14,462 — — 1,091 4,038,036 Real estate construction 1,544,194 179 — — 486 1,544,858 Commercial real estate lending 5,566,676 14,641 — — 1,577 5,582,894 Total commercial 14,963,182 15,200 468 436 62,269 15,041,555 Residential mortgage 8,057,461 9,492 610 — 64,855 8,132,417 Home equity 828,523 6,012 988 — 9,378 844,901 Other consumer 342,950 1,028 749 1,819 215 346,761 Total consumer 9,228,933 16,531 2,348 1,819 74,448 9,324,079 Total loans $ 24,192,115 $ 31,731 $ 2,816 $ 2,255 $ 136,717 $ 24,365,633 (a) Of the total nonaccrual loans, $75 million, or 55%, were current with respect to payment at March 31, 2020. (b) No interest income was recognized on nonaccrual loans during the three months ended March 31, 2020. In addition, there were $44 million of nonaccrual loans for which there was no related ACLL for the three months ended March 31, 2020. The following table presents loans by past due status at December 31, 2019: Accruing ($ in Thousands) Current 30-59 Days 60-89 Days 90 Days or Nonaccrual (a) Total Commercial and industrial $ 7,307,118 $ 576 $ 245 $ 342 $ 46,312 $ 7,354,594 Commercial real estate - owner occupied 909,828 1,369 — — 67 911,265 Commercial and business lending 8,216,947 1,945 245 342 46,380 8,265,858 Commercial real estate - investor 3,788,296 1,812 — — 4,409 3,794,517 Real estate construction 1,420,310 64 33 — 493 1,420,900 Commercial real estate lending 5,208,606 1,876 33 — 4,902 5,215,417 Total commercial 13,425,552 3,821 278 342 51,282 13,481,275 Residential mortgage 8,069,863 8,749 525 — 57,844 8,136,980 Home equity 837,274 4,483 1,164 — 9,104 852,025 Other consumer 347,007 1,135 949 1,917 152 351,159 Total consumer 9,254,144 14,366 2,638 1,917 67,099 9,340,164 Total loans $ 22,679,696 $ 18,188 $ 2,916 $ 2,259 $ 118,380 $ 22,821,440 (a) Of the total nonaccrual loans, $48 million, or 41%, were current with respect to payment at December 31, 2019. The following table presents impaired loans individually evaluated under ASC Topic 310, excluding $2 million of purchased credit-impaired loans, at December 31, 2019 : ($ in Thousands) Recorded Unpaid Related Average Interest Loans with a related allowance Commercial and industrial $ 47,249 $ 63,346 $ 12,010 $ 45,290 $ 1,832 Commercial real estate — owner occupied 1,676 1,682 19 1,774 88 Commercial and business lending 48,924 65,028 12,029 47,064 1,919 Commercial real estate — investor 928 2,104 15 950 15 Real estate construction 477 559 67 494 30 Commercial real estate lending 1,405 2,663 82 1,445 45 Total commercial 50,329 67,691 12,111 48,509 1,965 Residential mortgage 21,450 22,625 2,740 23,721 856 Home equity 3,076 3,468 1,190 3,756 191 Other consumer 1,247 1,249 125 1,250 1 Total consumer 25,773 27,342 4,055 28,726 1,047 Total loans with a related allowance $ 76,102 $ 95,033 $ 16,165 $ 77,235 $ 3,012 Loans with no related allowance Commercial and industrial $ 14,787 $ 33,438 $ — $ 20,502 $ 63 Commercial real estate — owner occupied — — — — — Commercial and business lending 14,787 33,438 — 20,502 63 Commercial real estate — investor 3,705 3,705 — 3,980 159 Real estate construction — — — — — Commercial real estate lending 3,705 3,705 — 3,980 159 Total commercial 18,491 37,142 — 24,482 222 Residential mortgage 14,104 14,461 — 10,962 373 Home equity 1,346 1,383 — 1,017 21 Other consumer — — — — — Total consumer 15,450 15,845 — 11,979 394 Total loans with no related allowance $ 33,941 $ 52,987 $ — $ 36,462 $ 616 Total Commercial and industrial $ 62,035 $ 96,784 $ 12,010 $ 65,792 $ 1,895 Commercial real estate — owner occupied 1,676 1,682 19 1,774 88 Commercial and business lending 63,711 98,466 12,029 67,566 1,982 Commercial real estate — investor 4,633 5,808 15 4,931 174 Real estate construction 477 559 67 494 30 Commercial real estate lending 5,110 6,367 82 5,425 204 Total commercial 68,820 104,833 12,111 72,991 2,186 Residential mortgage 35,554 37,087 2,740 34,683 1,229 Home equity 4,422 4,851 1,190 4,773 211 Other consumer 1,247 1,249 125 1,250 1 Total consumer 41,223 43,187 4,055 40,706 1,441 Total loans (a) $ 110,043 $ 148,020 $ 16,165 $ 113,697 $ 3,628 (a) The net recorded investment (defined as recorded investment, net of the related allowance) of the impaired loans represented 63% of the unpaid principal balance at December 31, 2019. Troubled Debt Restructurings (“Restructured Loans”) Loans are considered restructured loans if concessions have been granted to borrowers that are experiencing financial difficulty. The following table presents nonaccrual and performing restructured loans by loan portfolio: March 31, 2020 December 31, 2019 ($ in Thousands) Performing Nonaccrual Restructured Loans (a) Performing Nonaccrual Restructured Loans (a) Commercial and industrial $ 16,056 $ 6,909 $ 16,678 $ 7,376 Commercial real estate — owner occupied 2,091 — 1,676 — Commercial real estate — investor 281 570 293 — Real estate construction 339 176 298 179 Residential mortgage 4,654 15,097 3,955 13,035 Home equity 1,719 1,451 1,896 1,904 Other consumer 1,245 1 1,246 1 Total restructured loans (b) $ 26,384 $ 24,204 $ 26,041 $ 22,494 (a) Nonaccrual restructured loans have been included within nonaccrual loans. (b) Does not include any restructured loans related to COVID-19 in accordance with regulatory guidance. The Corporation had a recorded investment of $5 million in loans modified in a TDR during the three months ended March 31, 2020, of which $1 million were in accrual status and $4 million were in nonaccrual pending a sustained period of repayment. Short-term loan modifications made in good faith to help ease the adverse effects of COVID-19 are not categorized as TDRs in accordance with regulatory guidance. The following table provides the number of loans modified in a TDR by loan portfolio, the recorded investment and unpaid principal balance for the three months ended March 31, 2020 and 2019: Three Months Ended March 31, 2020 Three Months Ended March 31, 2019 ($ in Thousands) Number Recorded Investment (a) Unpaid Principal Balance (b) Number Recorded Investment (a) Unpaid Principal Balance (b) Commercial and industrial 1 $ 48 $ 48 — $ — $ — Commercial real estate — owner occupied 1 290 321 1 78 78 Commercial real estate — investor 1 570 1,740 — — — Real estate construction 1 122 122 — — — Residential mortgage 18 3,592 3,668 25 4,357 4,374 Home equity 8 277 277 13 293 312 Other consumer — — — 1 11 11 Total loans modified 30 $ 4,899 $ 6,175 40 $ 4,739 $ 4,776 (a) Represents post-modification outstanding recorded investment. (b) Represents pre-modification outstanding recorded investment. Restructured loan modifications may include payment schedule modifications, interest rate concessions, maturity date extensions, modification of note structure (A/B Note), non-reaffirmed Chapter 7 bankruptcies, principal reduction, or some combination of these concessions. During the three months ended March 31, 2020, restructured loan modifications of commercial and industrial, and commercial real estate primarily included maturity date extensions and payment schedule modifications. Restructured loan modifications of residential mortgage and home equity loans primarily included maturity date extensions, interest rate concessions, non-reaffirmed Chapter 7 bankruptcies, or a combination of these concessions for the three months ended March 31, 2020. The following table provides the number of loans modified in a TDR during the previous twelve months which subsequently defaulted during the three months ended March 31, 2020 and 2019 and the recorded investment in these restructured loans as of March 31, 2020 and 2019: Three Months Ended March 31, 2020 Three Months Ended March 31, 2019 ($ in Thousands) Number of Recorded Number of Recorded Residential mortgage 3 $ 388 5 $ 613 Home equity 2 88 7 177 Total loans modified 5 $ 476 12 $ 790 All loans modified in a TDR are evaluated for impairment. The nature and extent of the impairment of restructured loans, including those which have experienced a subsequent payment default, are considered in the determination of an appropriate level of the allowance for credit losses on loans. The Corporation analyzes loans for classification as a probable TDR. This analysis includes identifying customers that are showing possible liquidity issues in the near term without reasonable access to alternative sources of capital. At adoption of ASU 2016-13 on January 1, 2020, the Corporation had $114 million in loans meeting this classification compared to $138 million at March 31, 2020. Of the loans classified as probable TDRs at March 31, 2020, $112 million are within the oil and gas portfolio, while one loan with a balance of $27 million, is in general commercial and business lending. Allowance for Credit Losses on Loans The ACLL is comprised of the allowance for loan losses and the allowance for unfunded commitments. The level of the ACLL represents management’s estimate of an amount appropriate to provide for expected lifetime credit losses in the loan portfolio at the balance sheet date. A main factor in the determination of the ACLL is the economic forecast. The Corporation utilized the Moody's baseline forecast, updated at the end of March 2020, in the allowance model. The forecast is applied over a 1 year reasonable and supportable period with immediate reversion to historical long run losses. The Corporation changed the reversion methodology applied from straight-line over 1 year to immediate reversion due to the uncertainty within the economic forecasts due to COVID-19. The allowance for unfunded commitments is maintained at a level believed by management to be sufficient to absorb expected lifetime losses related to unfunded credit facilities (including unfunded loan commitments and letters of credit). See Note 12 for additional information on the change in the allowance for unfunded commitments. The following table presents a summary of the changes in the ACLL by portfolio segment for the three months ended March 31, 2020: ($ in Thousands) Dec. 31, 2019 Cumulative effect of ASU 2016-13 adoption (CECL) Jan. 1, 2020 Charge offs Recoveries Net Charge offs Allowance for PCD loans for bank acquisition Provision recorded at acquisition Provision for loan losses March 31, 2020 ACLL / Loans Allowance for loan losses Commercial and industrial $ 91,133 $ 52,919 $ 144,052 $ (16,336) $ 1,288 $ (15,049) $ 293 $ 408 $ 44,284 $ 173,988 Commercial real estate — owner occupied 10,284 (1,851) 8,433 — — — 890 255 734 10,313 Commercial and business lending 101,417 51,068 152,485 (16,336) 1,288 (15,048) 1,183 663 45,018 184,301 Commercial real estate — investor 40,514 2,041 42,555 — — — 753 472 (1,664) 42,115 Real estate construction 24,915 7,467 32,382 (7) 19 11 435 492 (2,573) 30,746 Commercial real estate lending 65,428 9,508 74,937 (7) 19 11 1,188 964 (4,237) 72,861 Total commercial 166,846 60,576 227,422 (16,343) 1,307 (15,037) 2,371 1,627 40,781 257,162 Residential mortgage 16,960 33,215 50,175 (1,003) 91 (912) 651 403 (6,370) 43,947 Home equity 10,926 11,649 22,575 (526) 598 71 422 374 (1,135) 22,308 Other consumer 6,639 7,016 13,655 (1,434) 272 (1,162) 61 140 1,681 14,376 Total consumer 34,525 51,880 86,405 (2,963) 961 (2,003) 1,134 917 (5,824) 80,631 Total loans $ 201,371 $ 112,457 $ 313,828 $ (19,308) $ 2,268 $ (17,040) $ 3,504 $ 2,543 $ 34,957 $ 337,793 Allowance for unfunded commitments Commercial and industrial $ 12,276 $ (3,998) $ 8,278 $ — $ — $ — $ — $ 61 $ 6,461 $ 14,800 Commercial real estate — owner occupied 127 — 127 — — — — 4 109 240 Commercial and business lending 12,403 (3,998) 8,405 — — — — 65 6,570 15,040 Commercial real estate — investor 530 246 776 — — — — 2 (347) 431 Real estate construction 7,532 18,347 25,879 — — — — 45 9,018 34,942 Commercial real estate lending 8,062 18,593 26,655 — — — — 47 8,671 35,373 Total commercial 20,465 14,595 35,060 — — — — 112 15,241 50,413 Home equity 1,038 2,591 3,629 — — — — 66 241 3,936 Other consumer 405 1,504 1,909 — — — — — 17 1,926 Total consumer 1,443 4,095 5,538 — — — — 66 258 5,862 Total loans $ 21,907 $ 18,690 $ 40,597 $ — $ — $ — $ — $ 179 $ 15,500 $ 56,276 Allowance for credit losses on loans Commercial and industrial $ 103,409 $ 48,921 $ 152,330 $ (16,336) $ 1,288 $ (15,049) $ 293 $ 469 $ 50,745 $ 188,788 2.22 % Commercial real estate — owner occupied 10,411 (1,851) 8,560 — — — 890 259 843 10,553 1.12 % Commercial and business lending 113,820 47,070 160,890 (16,336) 1,288 (15,048) 1,183 728 51,588 199,342 2.11 % Commercial real estate — investor 41,044 2,287 43,331 — — — 753 474 (2,011) 42,546 1.05 % Real estate construction 32,447 25,814 58,261 (7) 19 11 435 537 6,445 65,688 4.25 % Commercial real estate lending 73,490 28,101 101,591 (7) 19 11 1,188 1,011 4,434 108,235 1.94 % Total commercial 187,311 75,171 262,482 (16,343) 1,307 (15,037) 2,371 1,739 56,022 307,577 2.04 % Residential mortgage 16,960 33,215 50,175 (1,003) 91 (912) 651 403 (6,370) 43,947 0.54 % Home equity 11,964 14,240 26,204 (526) 598 71 422 440 (894) 26,244 3.11 % Other consumer 7,044 8,520 15,564 (1,434) 272 (1,162) 61 140 1,698 16,302 4.70 % Total consumer 35,968 55,975 91,943 (2,963) 961 (2,003) 1,134 983 (5,566) 86,493 0.93 % Total loans $ 223,278 $ 131,147 $ 354,425 $ (19,308) $ 2,268 $ (17,040) $ 3,504 $ 2,722 $ 50,457 $ 394,069 1.62 % The following table presents details of the allowance for loan losses segregated by loan portfolio segment as of December 31, 2019, calculated in accordance with prior incurred loss methodology applicable under ASC Topic 310: ($ in Thousands) December 31, 2018 Charge offs Recoveries Net Charge offs Provision for loan losses December 31, 2019 Allowance for loan losses Commercial and industrial $ 108,835 $ (63,315) $ 11,875 $ (51,441) $ 33,738 $ 91,133 Commercial real estate — owner occupied 9,255 (222) 2,795 2,573 (1,543) 10,284 Commercial and business lending 118,090 (63,537) 14,670 (48,868) 32,195 101,417 Commercial real estate — investor 40,844 — 31 31 (361) 40,514 Real estate construction 28,240 (60) 302 243 (3,568) 24,915 Commercial real estate lending 69,084 (60) 333 274 (3,929) 65,429 Total commercial 187,174 (63,597) 15,003 (48,594) 28,266 166,846 Residential mortgage 25,595 (3,322) 692 (2,630) (6,005) 16,960 Home equity 19,266 (1,846) 2,599 753 (9,093) 10,926 Other consumer 5,988 (5,548) 868 (4,681) 5,332 6,639 Total consumer 50,849 (10,716) 4,159 (6,558) (9,766) 34,525 Total loans $ 238,023 $ (74,313) $ 19,161 $ (55,152) $ 18,500 $ 201,371 A summary of the individually and collectively evaluated loans by portfolio segment at December 31, 2019, was as follows: Allowance for loan losses Loans ($ in Thousands) Individually evaluated for impairment Collectively evaluated for impairment Total allowance for loan losses Individually evaluated for impairment Collectively evaluated for impairment Acquired and accounted for under ASC 310-30 (a) Total loans Commercial and industrial $ 12,010 $ 79,123 $ 91,133 $ 62,035 $ 7,292,217 $ 342 $ 7,354,594 Commercial real estate — owner occupied 19 10,265 10,284 1,676 909,010 579 911,265 Commercial and business lending 12,029 89,388 101,417 63,711 8,201,227 921 8,265,858 Commercial real estate — investor 15 40,498 40,514 4,633 3,789,755 129 3,794,517 Real estate construction 67 24,848 24,915 477 1,420,416 7 1,420,900 Commercial real estate lending 82 65,346 65,429 5,110 5,210,171 136 5,215,417 Total commercial 12,111 154,734 166,846 68,821 13,411,398 1,057 13,481,275 Residential mortgage 2,740 14,220 16,960 35,554 8,100,958 469 8,136,980 Home equity 1,190 9,737 10,926 4,422 847,577 26 852,025 Other consumer 125 6,514 6,639 1,247 349,912 — 351,159 Total consumer 4,055 30,471 34,525 41,223 9,298,447 495 9,340,164 Total loans $ 16,165 $ 185,205 $ 201,371 $ 110,043 $ 22,709,845 $ 1,552 $ 22,821,440 (a) Loans acquired in business combinations and accounted for under ASC Subtopic 310-30 "Receivables — Loans and Debt Securities Acquired with Deteriorated Credit Quality." Loans Acquired in Acquisitions Loans acquired in a business combination after January 1, 2020 are recorded in accordance with ASC Topic 326. See Note 2 Acquisitions for more information on loans acquired in a business combination. After January 1, 2020, acquired loans were segregated into two types: • PCD loans are loans demonstrating more than insignificant credit deterioration since origination and are accounted for with ASC 326-30. Under this guidance, the credit mark on acquired assets gross up the allowance for loan losses and the amortized cost of the loan. • Non-PCD loans are accounted for in accordance with ASC Topic 310-20 "Nonrefundable Fees and Other Costs" as these loans do not show evidence of credit deterioration since origination. Loans acquired in a business combination prior to January 1, 2020 were recorded at estimated fair value on their purchase date without a carryover of the related allowance for loan losses. Prior to January 1, 2020, acquired loans were segregated into two types: • Performing loans were accounted for in accordance with ASC Topic 310-20 "Nonrefundable Fees and Other Costs" as these loans do not have evidence of credit deterioration since origination. • Nonperforming loans were accounted for in accordance with ASC Topic 310-30 as they displayed significant credit deterioration since origination.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	3 Months Ended
	Mar. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill Goodwill is not amortized but is instead subject to impairment tests on at least an annual basis, and more frequently if an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying amount. The Corporation conducted its most recent annual impairment testing in May 2019, utilizing a qualitative assessment. Factors that management considered in this assessment included macroeconomic conditions, industry and market considerations, overall financial performance of the Corporation and each reporting unit (both current and projected), changes in management strategy, and changes in the composition or carrying amount of net assets. In addition, management considered the changes in both the Corporation’s common stock price and in the overall bank common stock index (based on the S&P 400 Regional Bank Sub-Industry Index), as well as the Corporation’s earnings per common share trend over the past year. Based on these assessments, management concluded that it is more likely than not that the estimated fair value exceeded the carrying value (including goodwill) for each reporting unit. Therefore, a step one quantitative analysis was not required. There have been no events since the May 2019 impairment testing that have changed the Corporation's impairment assessment conclusion. A qualitative analysis was performed during the first quarter of 2020 after COVID-19 was declared a national emergency, to determine if a triggering event had occurred. The Corporation determined a triggering event had not occurred, therefore, a step one quantitative analysis was not required during the first quarter of 2020. There were no impairment charges recorded in 2019 or the first three months of 2020. At both March 31, 2020 and December 31, 2019, the Corporation had goodwill of $1.2 billion, of which $82 million was related to our insurance operations. There was an increase of $15 million during the first quarter of 2020 related to the First Staunton acquisition. Other Intangible Assets The Corporation has other intangible assets that are amortized, consisting of CDIs, other intangibles (primarily related to customer relationships acquired in connection with the Corporation’s insurance agency acquisitions), and MSRs. At March 31, 2020, the Corporation had $19 million of other intangibles, compared to $20 million at December 31, 2019, of which $18 million was related to our insurance operations. For CDIs and other intangibles, changes in the gross carrying amount, accumulated amortization, and net book value were as follows: ($ in Thousands) Three Months Ended March 31, 2020 Year Ended December 31, 2019 Core deposit intangibles Gross carrying amount at the beginning of the year $ 80,730 $ 58,100 Additions during the period 7,379 22,630 Accumulated amortization (14,597) (12,456) Net book value $ 73,512 $ 68,274 Amortization during the year $ 2,141 $ 7,130 Other intangibles Gross carrying amount at the beginning of the year $ 38,970 $ 44,887 Additions during the period 200 — Reductions due to sale (343) (217) Accumulated amortization (19,616) (24,643) Net book value $ 19,211 $ 20,027 Amortization during the year $ 673 $ 2,818 Mortgage Servicing Rights The Corporation sells residential mortgage loans in the secondary market and typically retains the right to service the loans sold. MSRs are amortized in proportion to and over the period of estimated net servicing income and assessed for impairment at each reporting date. The Corporation evaluates its MSRs asset for impairment at minimum on a quarterly basis. Impairment is assessed based on fair value at each reporting date using estimated prepayment speeds of the underlying mortgage loans serviced and stratifications based on the risk characteristics of the underlying loans (predominantly loan type and note interest rate). As mortgage interest rates fall, prepayment speeds are usually faster and the value of the MSRs asset generally decreases, requiring additional valuation reserve. Conversely, as mortgage interest rates rise, prepayment speeds are usually slower and the value of the MSRs asset generally increases, requiring less valuation reserve. A valuation allowance is established, through a charge to earnings, to the extent the amortized cost of the MSRs exceeds the estimated fair value by stratification. During the first quarter of 2020, the Corporation recognized temporary impairment of $9 million driven by decreasing interest rates. If it is later determined that all or a portion of the temporary impairment no longer exists for a stratification, the valuation is reduced through a recovery to earnings. An other-than-temporary impairment (i.e., recoverability is considered remote when considering interest rates and loan pay off activity) is recognized as a write-down of the MSRs asset and the related valuation allowance (to the extent a valuation allowance is available) and then against earnings. A direct write-down permanently reduces the carrying value of the MSRs asset and valuation allowance, precluding subsequent recoveries. See Note 12 for a discussion of the recourse provisions on sold residential mortgage loans. See Note 13 which further discusses fair value measurement relative to the MSRs asset. A summary of changes in the balance of the MSRs asset and the MSRs valuation allowance is as follows: ($ in Thousands) Three Months Ended March 31, 2020 Year Ended December 31, 2019 Mortgage servicing rights Mortgage servicing rights at beginning of period $ 67,607 $ 68,433 Additions from acquisition 1,357 — Additions 2,359 11,606 Amortization (3,635) (12,432) Mortgage servicing rights at end of period $ 67,688 $ 67,607 Valuation allowance at beginning of period $ (302) $ (239) (Additions) recoveries, net (9,098) (63) Valuation allowance at end of period $ (9,399) $ (302) Mortgage servicing rights, net $ 58,289 $ 67,306 Fair value of mortgage servicing rights $ 58,311 $ 72,532 Portfolio of residential mortgage loans serviced for others (“servicing portfolio”) $ 8,548,600 $ 8,488,969 Mortgage servicing rights, net to servicing portfolio 0.68 % 0.79 % Mortgage servicing rights expense (a) $ 12,733 $ 12,494 (a) Includes the amortization of mortgage servicing rights and additions / recoveries to the valuation allowance of mortgage servicing rights, and is a component of mortgage banking, net on the consolidated statements of income. The projections of amortization expense are based on existing asset balances, the current interest rate environment, and prepayment speeds as of March 31, 2020. The actual amortization expense the Corporation recognizes in any given period may be significantly different depending upon acquisition or sale activities, changes in interest rates, prepayment speeds, market conditions, regulatory requirements, and events or circumstances that indicate the carrying amount of an asset may not be recoverable. The following table shows the estimated future amortization expense for amortizing intangible assets: ($ in Thousands) Core Deposit Intangibles Other Intangibles Mortgage Servicing Rights Nine Months Ending December 31, 2020 $ 6,608 $ 2,008 $ 9,609 2021 8,811 2,653 13,307 2022 8,811 2,629 10,456 2023 8,811 2,610 8,279 2024 8,811 2,591 6,632 2025 8,811 2,302 5,372 Beyond 2025 22,849 4,418 14,032 Total Estimated Amortization Expense $ 73,512 $ 19,211 $ 67,688

Short and Long-Term Funding

Short and Long-Term Funding	3 Months Ended
	Mar. 31, 2020
Debt Disclosure [Abstract]
Short and Long-Term Funding	Short and Long-Term Funding The following table presents the components of short-term funding (funding with original contractual maturities of one year or less), long-term funding (funding with original contractual maturities greater than one year), and FHLB advances (funding based on original contractual maturities): ($ in Thousands) March 31, 2020 December 31, 2019 Short-Term Funding Federal funds purchased $ 24,480 $ 362,000 Securities sold under agreements to repurchase 108,527 71,097 Federal funds purchased and securities sold under agreements to repurchase 133,007 433,097 Commercial paper 33,647 32,016 Total short-term funding $ 166,654 $ 465,113 Long-Term Funding Bank senior notes, at par, due 2021 $ 300,000 $ 300,000 Corporation subordinated notes, at par, due 2025 250,000 250,000 Finance leases 2,210 2,209 Capitalized costs (2,565) (2,866) Total long-term funding 549,644 549,343 Total short and long-term funding, excluding FHLB advances $ 716,299 $ 1,014,456 FHLB Advances Short-term FHLB advances $ 550,000 $ 520,000 Long-term FHLB advances 2,664,194 2,660,967 Total FHLB advances $ 3,214,194 $ 3,180,967 Total short and long-term funding $ 3,930,493 $ 4,195,422 Securities Sold Under Agreements to Repurchase ("Repurchase Agreements") The Corporation enters into agreements under which it sells securities subject to an obligation to repurchase the same or similar securities. Under these arrangements, the Corporation may transfer legal control over the assets but still retain effective control through an agreement that both entitles and obligates the Corporation to repurchase the assets. The obligation to repurchase the securities is reflected as a liability on the Corporation’s consolidated balance sheets, while the securities underlying the repurchase agreements remain in the respective investment securities asset accounts (i.e., there is no offsetting or netting of the investment securities assets with the repurchase agreement liabilities). See Note 11 for additional disclosures on balance sheet offsetting. The Corporation utilizes securities sold under agreements to repurchase to facilitate the needs of its customers. As of March 31, 2020, the Corporation pledged agency mortgage-related securities with a fair value of $202 million as collateral for the repurchase agreements. Securities pledged as collateral under repurchase agreements are maintained with the Corporation's safekeeping agents and are monitored on a daily basis due to the market risk of fair value changes in the underlying securities. The Corporation generally pledges excess securities to ensure there is sufficient collateral to satisfy short-term fluctuations in both the repurchase agreement balances and the fair value of the underlying securities. The remaining contractual maturity of the securities sold under agreements to repurchase on the consolidated balance sheets as of March 31, 2020 and December 31, 2019 are presented in the following table: Remaining Contractual Maturity of the Agreements ($ in Thousands) Overnight and Continuous Up to 30 days 30-90 days Greater than 90 days Total March 31, 2020 Repurchase agreements Agency mortgage-related securities $ 108,527 $ — $ — $ — $ 108,527 Total $ 108,527 $ — $ — $ — $ 108,257 December 31, 2019 Repurchase agreements Agency mortgage-related securities $ 71,097 $ — $ — $ — $ 71,097 Total $ 71,097 $ — $ — $ — $ 71,097 Long-Term Funding Senior Notes In August 2018, the Bank issued $300 million of senior notes, due August 2021, and callable July 2021. The senior notes have a fixed coupon interest rate of 3.50% and were issued at a discount. Subordinated Notes In November 2014, the Corporation issued $250 million of 10-year subordinated notes, due January 2025, and callable October 2024. The subordinated notes have a fixed coupon interest rate of 4.25% and were issued at a discount. Finance Leases In connection with the construction of a new branch in Oshkosh, Wisconsin, the Corporation entered into a 40-year land lease, maturing August 2059, with an option to purchase the underlying land in August 2022 for a fixed price of $1.2 million. The finance lease has a fixed interest rate of 3.99%. See Note 18 for additional disclosure regarding the Corporation’s leases.

Derivative and Hedging Activiti

Derivative and Hedging Activities	3 Months Ended
	Mar. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative and Hedging Activities	Derivative and Hedging Activities The Corporation is exposed to certain risk arising from both its business operations and economic conditions. The Corporation principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. The Corporation manages economic risks, including interest rate, liquidity, and credit risk primarily by managing the amount, sources, and duration of its assets and liabilities and the use of derivative financial instruments. Specifically, the Corporation enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the value of which are determined by interest rates. The Corporation's derivative financial instruments are used to manage differences in the amount, timing, and duration of the Corporation's known or expected cash receipts and its known or expected cash payments principally related to the Corporation's assets. The contract or notional amount of a derivative is used to determine, along with the other terms of the derivative, the amounts to be exchanged between the counterparties. The Corporation is exposed to credit risk in the event of nonperformance by counterparties to financial instruments. To mitigate the counterparty risk, contracts generally contain language outlining collateral pledging requirements for each counterparty. For non-centrally cleared derivatives, collateral must be posted when the market value exceeds certain mutually agreed upon threshold limits. Securities and cash are often pledged as collateral. The Corporation pledged $80 million of investment securities as collateral at March 31, 2020, and pledged $57 million of investment securities as collateral at December 31, 2019. At March 31, 2020, the Corporation posted $36 million of cash collateral compared to $14 million at December 31, 2019. Federal regulations require the Corporation to clear all LIBOR interest rate swaps through a clearing house, if possible. For derivatives cleared through central clearing houses the variation margin payments are legally characterized as daily settlements of the derivative rather than collateral. The Corporation's clearing agent for interest rate derivative contracts that are centrally cleared through the Chicago Mercantile Exchange (CME) and the London Clearing House (LCH) settles the variation margin daily. As a result, the variation margin payment and the related derivative instruments are considered a single unit of account for accounting and financial reporting purposes. Depending on the net position, the fair value is reported in other assets or accrued expenses and other liabilities on the consolidated balance sheets. The daily settlement of the derivative exposure does not change or reset the contractual terms of the instrument. Fair Value Hedges of Interest Rate Risk The Corporation is exposed to changes in the fair value of certain of its pools of prepayable fixed-rate assets due to changes in benchmark interest rates. The Corporation used interest rate swaps to manage its exposure to changes in fair value on these instruments attributable to changes in the designated benchmark interest rate. Interest rate swaps designated as fair value hedges involved the payment of fixed-rate amounts to a counterparty in exchange for the Corporation receiving variable-rate payments over the life of the agreements without the exchange of the underlying notional amount. For derivatives designated and that qualify as fair value hedges, the gain or loss on the derivative as well as the offsetting loss or gain on the hedged item attributable to the hedged risk were recognized in interest income. During the fourth quarter of 2019, the Corporation terminated the outstanding fair value hedges. Derivatives to Accommodate Customer Needs The Corporation also facilitates customer borrowing activity by entering into various derivative contracts which are designated as free standing derivative contracts. Free standing derivative products are entered into primarily for the benefit of commercial customers seeking to manage their exposures to interest rate risk, foreign currency, and commodity prices. These derivative contracts are not designated against specific assets and liabilities on the consolidated balance sheets or forecasted transactions and, therefore, do not qualify for hedge accounting treatment. Such derivative contracts are carried at fair value in other assets and accrued expenses and other liabilities on the consolidated balance sheets with changes in the fair value recorded as a component of capital markets, net, and typically include interest rate-related instruments (swaps and caps), foreign currency exchange forwards, and commodity contracts. See Note 11 for additional information and disclosures on balance sheet offsetting. Interest rate-related instruments: The Corporation provides interest rate risk management services to commercial customers, primarily forward interest rate swaps and caps. The Corporation’s market risk from unfavorable movements in interest rates related to these derivative contracts is generally economically hedged by concurrently entering into offsetting derivative contracts. The offsetting derivative contracts have identical notional values, terms, and indices. Foreign currency exchange forwards: The Corporation provides foreign currency exchange services to customers, primarily forward contracts. The Corporation's customers enter into a foreign currency exchange forward with the Corporation as a means for them to mitigate exchange rate risk. The Corporation mitigates its risk by then entering into an offsetting foreign currency exchange derivative contract. Commodity contracts: Commodity contracts are entered into primarily for the benefit of commercial customers seeking to manage their exposure to fluctuating commodity prices. The Corporation mitigates its risk by then entering into an offsetting commodity derivative contract. Mortgage Derivatives Interest rate lock commitments to originate residential mortgage loans held for sale and forward commitments to sell residential mortgage loans are considered derivative instruments, and the fair value of these commitments is recorded in other assets and accrued expenses and other liabilities on the consolidated balance sheets with the changes in fair value recorded as a component of mortgage banking, net. The following table presents the total notional amounts and gross fair values of the Company’s derivatives, as well as the balance sheet netting adjustments as of March 31, 2020 and December 31, 2019. The derivative assets and liabilities are presented on a gross basis prior to the application of bilateral collateral and master netting agreements, but after the variation margin payments with central clearing organizations have been applied as settlement, as applicable. Total derivative assets and liabilities are adjusted to take into consideration the effects of legally enforceable master netting agreements and cash collateral received or paid as of March 31, 2020 and December 31, 2019. The resulting net derivative asset and liability fair values are included in other assets and accrued expenses and other liabilities, respectively, on the consolidated balance sheets. March 31, 2020 December 31, 2019 Asset Liability Asset Liability ($ in Thousands) Notional Amount Fair Value Notional Amount Fair Value Notional Amount Fair Value Notional Amount Fair Value Not designated as hedging instruments Interest rate-related instruments $ 3,430,859 $ 220,445 $ 3,430,859 $ 30,449 $ 3,029,877 $ 77,024 $ 3,029,877 $ 13,073 Foreign currency exchange forwards 322,066 9,272 295,774 9,215 272,636 4,226 264,653 4,048 Commodity contracts 208,621 69,241 203,955 67,592 255,089 20,528 255,165 19,624 Mortgage banking (a) 343,193 12,454 471,000 10,972 255,291 2,527 263,000 710 Gross derivatives before netting $ 311,413 $ 118,228 $ 104,305 $ 37,455 Less: Legally enforceable master netting agreements 2,847 2,847 10,410 10,410 Less: Cash collateral pledged/received 69,654 30,645 1,408 11,365 Total derivative instruments, after netting $ 238,912 $ 84,736 $ 92,487 $ 15,680 (a) Mortgage derivative assets include interest rate lock commitments and mortgage derivative liabilities include forward commitments. The Corporation terminated its $500 million fair value hedge during the fourth quarter of 2019. At March 31, 2020, the amortized cost basis of the closed portfolios which had previously been used in the terminated hedging relationship was $829 million and is included in loans and investment securities, available for sale, at fair value on the consolidated balance sheets. This amount includes $5 million of hedging adjustments on the discontinued hedging relationships. The table below identifies the effect of fair value hedge accounting on the Corporation's consolidated statements of income for the three months ended March 31, 2020 and 2019: Location and Amount of Gain or (Loss) Recognized in Income on Three Months Ended March 31, 2020 Three Months Ended March 31, 2019 ($ in Thousands) Interest Income Other Income (Expense) Interest Income Other Income (Expense) Total amounts of income and expense line items presented on the consolidated statements of income in which the effects of the fair value hedge is recorded $ (322) $ (262) $ 166 $ — The effects of fair value hedging: Gain or (loss) on fair value hedging relationships in Subtopic 815-20 Interest contracts Hedged items (322) (262) 2,057 — Derivatives designated as hedging instruments (a) — — (1,891) — (a) Includes net settlements on the derivatives. The table below identifies the effect of derivatives not designated as hedging instruments on the Corporation's consolidated statements of income for the three months ended March 31, 2020 and 2019: Consolidated Statements of Income Category of Three Months Ended March 31, ($ in Thousands) 2020 2019 Derivative Instruments Interest rate-related instruments — customer and mirror, net Capital markets, net $ (3,090) $ (672) Foreign currency exchange forwards Capital markets, net (122) 26 Commodity contracts Capital markets, net 746 (567) Interest rate lock commitments (mortgage) Mortgage banking, net 9,928 824 Forward commitments (mortgage) Mortgage banking, net (10,262) 247

Balance Sheet Offsetting

Balance Sheet Offsetting	3 Months Ended
	Mar. 31, 2020
Offsetting [Abstract]
Balance Sheet Offsetting	Balance Sheet Offsetting Interest Rate-Related Instruments, Commodity Contracts, and Foreign Exchange Forwards (“Interest, Commodity, and Foreign Exchange Agreements”) The Corporation enters into interest rate-related instruments to facilitate the interest rate risk management strategies of commercial customers, commodity contracts to manage commercial customers' exposure to fluctuating commodity prices, and foreign exchange forwards to manage customers' exposure to fluctuating foreign exchange rates. The Corporation mitigates these risks by entering into equal and offsetting agreements with highly rated third-party financial institutions. The Corporation is party to master netting arrangements with its financial institution counterparties that create single net settlements of all legal claims or obligations to pay or receive the net amount of settlement of the individual interest, commodity, and foreign exchange agreements. Collateral, usually in the form of investment securities and cash, is posted by the counterparty with net liability positions in accordance with contract thresholds. Derivatives subject to a legally enforceable master netting agreement are reported on a net basis, net of cash collateral, in other assets and accrued expenses and other liabilities, on the face of the consolidated balance sheets. See Note 10 for additional information on the Corporation’s derivative and hedging activities. Securities Sold Under Agreements to Repurchase (“Repurchase Agreements”) The Corporation enters into agreements under which it sells securities subject to an obligation to repurchase the same or similar securities. These repurchase agreements are accounted for as collateralized financing arrangements (i.e., secured borrowings) and not as a sale and subsequent repurchase of securities (i.e., there is no offsetting or netting of the investment securities assets with the repurchase agreement liabilities). The right of set-off for a repurchase agreement resembles a secured borrowing, whereby the collateral would be used to settle the fair value of the repurchase agreement should the Corporation be in default (e.g., fails to make an interest payment to the counterparty). In addition, the Corporation does not enter into reverse repurchase agreements; therefore, there is no such offsetting to be done with the repurchase agreements. See Note 9 for additional disclosures on repurchase agreements. The following table presents the interest rate, commodity, and foreign exchange assets and liabilities subject to an enforceable master netting arrangement. The interest, commodity and foreign exchange agreements the Corporation has with its commercial customers are not subject to an enforceable master netting arrangement and are therefore excluded from this table: Gross Amounts Recognized Gross Amounts Subject to Master Netting Arrangements Offset on the Consolidated Balance Sheets Net Amounts Presented on the Consolidated Balance Sheets Investment Securities Received ($ in Thousands) Derivative Cash Collateral Received Net amount Derivative assets March 31, 2020 $ 72,501 $ (2,847) $ (69,654) $ — $ — $ — December 31, 2019 11,864 (10,410) (1,408) 45 — 45 Gross Amounts Recognized Gross Amounts Subject to Master Netting Arrangements Offset on the Consolidated Balance Sheets Net Amounts Presented on the Consolidated Balance Sheets Investment Securities Pledged ($ in Thousands) Derivative Liabilities Offset Cash Collateral Pledged Net amount Derivative liabilities March 31, 2020 $ 34,014 $ (2,847) $ (30,645) $ 523 $ — $ 523 December 31, 2019 22,189 (10,410) (11,365) 413 — 413

Commitments, Off-Balance Sheet

Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters	3 Months Ended
	Mar. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters	Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters The Corporation utilizes a variety of financial instruments in the normal course of business to meet the financial needs of its customers and to manage its own exposure to fluctuations in interest rates. These financial instruments include lending-related and other commitments (see below) as well as derivative instruments (see Note 10). The following is a summary of lending-related commitments: ($ in Thousands) March 31, 2020 December 31, 2019 Commitments to extend credit, excluding commitments to originate residential mortgage loans held for sale (a)(b) $ 8,483,952 $ 9,024,412 Commercial letters of credit (a) 7,966 7,081 Standby letters of credit (c) 265,406 277,969 (a) These off-balance sheet financial instruments are exercisable at the market rate prevailing at the date the underlying transaction will be completed and, thus, are deemed to have no current fair value, or the fair value is based on fees currently charged to enter into similar agreements and was not material at March 31, 2020 or December 31, 2019. (b) Interest rate lock commitments to originate residential mortgage loans held for sale are considered derivative instruments and are disclosed in Note 10. (c) The Corporation has established a liability of $3 million for both March 31, 2020 and December 31, 2019, as an estimate of the fair value of these financial instruments. Lending-related Commitments As a financial services provider, the Corporation routinely enters into commitments to extend credit. Such commitments are subject to the same credit policies and approval process accorded to loans made by the Corporation, with each customer’s creditworthiness evaluated on a case-by-case basis. The commitments generally have fixed expiration dates or other termination clauses and may require the payment of a fee. The Corporation’s exposure to credit loss in the event of nonperformance by the other party to these financial instruments is represented by the contractual amount of those instruments. The amount of collateral obtained, if deemed necessary by the Corporation upon extension of credit, is based on management’s credit evaluation of the customer. Since a significant portion of commitments to extend credit are subject to specific restrictive loan covenants or may expire without being drawn upon, the total commitment amounts do not necessarily represent future cash flow requirements. An allowance for unfunded commitments is maintained at a level believed by management to be sufficient to absorb expected lifetime losses related to unfunded commitments (including unfunded loan commitments and letters of credit). The following table presents a summary of the changes in the allowance for unfunded commitments: ($ in Thousands) Three Months Ended March 31, 2020 Year Ended December 31, 2019 Allowance for Unfunded Commitments Balance at beginning of period $ 21,907 $ 24,336 Cumulative effect of ASU 2016-13 adoption (CECL) 18,690 N/A Balance at beginning of period, adjusted 40,597 24,336 Provision for unfunded commitments 15,500 (2,500) Amount recorded at acquisition 179 70 Balance at end of period $ 56,276 $ 21,907 The increase is a result of the Day 1 modified retrospective adjustment of $19 million for the adoption of ASU 2016-13. In addition, there was a $16 million increase to the provision for unfunded commitments driven by the expected impact of the COVID-19 pandemic within the economic models used in the new expected credit loss methodology. See Note 3 Summary of Significant Accounting Policies and Note 7 of the notes to consolidated financial statements for additional information on the adoption of ASU 2016-13 and the allowance for unfunded commitments. Lending-related commitments include commitments to extend credit, commitments to originate residential mortgage loans held for sale, commercial letters of credit, and standby letters of credit. Commitments to extend credit are legally binding agreements to lend to customers at predetermined interest rates, as long as there is no violation of any condition established in the contracts. Interest rate lock commitments to originate residential mortgage loans held for sale and forward commitments to sell residential mortgage loans are considered derivative instruments, and the fair value of these commitments are recorded on the consolidated balance sheets. The Corporation’s derivative and hedging activity is further described in Note 10. Commercial and standby letters of credit are conditional commitments issued to guarantee the performance of a customer to a third party. Commercial letters of credit are issued specifically to facilitate commerce and typically result in the commitment being drawn on when the underlying transaction is consummated between the customer and the third party, while standby letters of credit generally are contingent upon the failure of the customer to perform according to the terms of the underlying contract with the third party. Other Commitments The Corporation invests in qualified affordable housing projects, federal and state historic projects, new market projects, and opportunity zone funds for the purpose of community reinvestment and obtaining tax credits and other tax benefits. Return on the Corporation's investment in these projects and funds comes in the form of the tax credits and tax losses that pass through to the Corporation and deferral or elimination of capital gain recognition for tax purposes. The aggregate carrying value of these investments at March 31, 2020 was $282 million, compared to $248 million at December 31, 2019, included in tax credit and other investments on the consolidated balance sheets. The Corporation utilizes the proportional amortization method to account for investments in qualified affordable housing projects. Under the proportional amortization method, the Corporation amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits. The Corporation recognized additional income tax expense attributable to the amortization of investments in qualified affordable housing projects of $6 million and $5 million for the three months ended March 31, 2020 and 2019, respectively. The Corporation's remaining investment in qualified affordable housing projects accounted for under the proportional amortization method totaled $268 million at March 31, 2020 and $234 million at December 31, 2019. The Corporation’s unfunded equity contributions relating to investments in qualified affordable housing, federal and state historic projects, and new market projects are recorded in accrued expenses and other liabilities on the consolidated balance sheets. The Corporation’s remaining unfunded equity contributions totaled $148 million and $123 million at March 31, 2020 and December 31, 2019, respectively. For the three months ended March 31, 2020 and the year ended December 31, 2019, the Corporation did not record any impairment related to qualified affordable housing investments. The Corporation has principal investment commitments to provide capital-based financing to private and public companies through either direct investments in specific companies or through investment funds and partnerships. The timing of future cash requirements to fund such principal investment commitments is generally dependent on the investment cycle, whereby privately held companies are funded by private equity investors and ultimately sold, merged, or taken public through an initial offering, which can vary based on overall market conditions, as well as the nature and type of industry in which the companies operate. The Corporation also invests in loan pools that support CRA loans. The timing of future cash requirements to fund these pools is dependent upon loan demand, which can vary over time. The aggregate carrying value of these investments was $28 million and $26 million at March 31, 2020 and December 31, 2019, respectively, included in tax credit and other investments on the consolidated balance sheets. Legal Proceedings The Corporation is party to various pending and threatened claims and legal proceedings arising in the normal course of business activities, some of which involve claims for substantial amounts. Although there can be no assurance as to the ultimate outcomes, the Corporation believes it has meritorious defenses to the claims asserted against it in its currently outstanding matters and intends to continue to defend itself vigorously with respect to such legal proceedings. The Corporation will consider settlement of cases when, in management’s judgment, it is in the best interests of the Corporation and its shareholders. On at least a quarterly basis, the Corporation assesses its liabilities and contingencies in connection with all pending or threatened claims and litigation, utilizing the most recent information available. On a matter by matter basis, an accrual for loss is established for those matters which the Corporation believes it is probable that a loss may be incurred and that the amount of such loss can be reasonably estimated. Once established, each accrual is adjusted as appropriate to reflect any subsequent developments. Accordingly, management’s estimate will change from time to time, and actual losses may be more or less than the current estimate. For matters where a loss is not probable, or the amount of the loss cannot be estimated, no accrual is established. Resolution of legal claims is inherently unpredictable, and in many legal proceedings various factors exacerbate this inherent unpredictability, including where the damages sought are unsubstantiated or indeterminate, it is unclear whether a case brought as a class action will be allowed to proceed on that basis, discovery is not complete, the proceeding is not yet in its final stages, the matters present legal uncertainties, there are significant facts in dispute, there are a large number of parties (including where it is uncertain how liability, if any, will be shared among multiple defendants), or there is a wide range of potential results. The Corporation does not believe it is presently subject to any legal proceedings the resolution of which would have a material adverse effect on our business, financial condition, operating results or cash flows. Regulatory Matters A variety of consumer products, including mortgage and deposit products, and certain fees and charges related to such products, have come under increased regulatory scrutiny. It is possible that regulatory authorities could bring enforcement actions, including civil money penalties, or take other actions against the Corporation and the Bank in regard to these consumer products. The Bank could also determine of its own accord, or be required by regulators, to refund or otherwise make remediation payments to customers in connection with these products. It is not possible at this time for management to assess the probability of a material adverse outcome or reasonably estimate the amount of any potential loss related to such matters. Mortgage Repurchase Reserve The Corporation sells residential mortgage loans to investors in the normal course of business. Residential mortgage loans sold to others are predominantly conventional residential first lien mortgages originated under the Corporation's usual underwriting procedures, and are most often sold on a nonrecourse basis, primarily to the GSEs. The Corporation’s agreements to sell residential mortgage loans in the normal course of business usually require certain representations and warranties on the underlying loans sold, related to credit information, loan documentation, collateral, and insurability. Subsequent to being sold, if a material underwriting deficiency or documentation defect is discovered, the Corporation may be obligated to repurchase the loan or reimburse the GSEs for losses incurred (collectively, “make whole requests”). The make whole requests and any related risk of loss under the representations and warranties are largely driven by borrower performance. As a result of make whole requests, the Corporation has repurchased loans with principal balances of $2 million for both the three months ended March 31, 2020 and the year ended December 31, 2019. There were no loss reimbursement and settlement claims paid for the three months ended March 31, 2020 and were negligible for the year ended December 31, 2019. Make whole requests during 2019 and the first three months of 2020 generally arose from loans sold during the period of January 1, 2012 to December 31, 2019. Since January 1, 2012, loans sold totaled $12.7 billion at the time of sale, and consisted primarily of loans sold to GSEs. As of March 31, 2020, approximately $7.4 billion of these sold loans remain outstanding. The balance in the mortgage repurchase reserve at the balance sheet date reflects the estimated amount of potential loss the Corporation could incur from repurchasing a loan, as well as loss reimbursements, indemnifications, and other settlement resolutions. The mortgage repurchase reserve was $1 million as of March 31, 2020 and $795,000 as of December 31, 2019. The Corporation may also sell residential mortgage loans with limited recourse (limited in that the recourse period ends prior to the loan’s maturity, usually after certain time and / or loan paydown criteria have been met), whereby repurchase could be required if the loan had defined delinquency issues during the limited recourse periods. At March 31, 2020 and December 31, 2019, there were approximately $44 million and $39 million, respectively, of residential mortgage loans sold with such recourse risk. There have been limited instances and immaterial historical losses on repurchases for recourse under the limited recourse criteria. The Corporation has a subordinate position to the FHLB in the credit risk on residential mortgage loans it sold to the FHLB in exchange for a monthly credit enhancement fee. The Corporation has not sold loans to the FHLB with such credit risk retention since February 2005. At March 31, 2020 and December 31, 2019, there were $42 million and $45 million, respectively, of such residential mortgage loans with credit risk recourse, upon which there have been negligible historical losses to the Corporation.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2020
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements Fair value represents the estimated price at which an orderly transaction to sell an asset or to transfer a liability would take place between market participants at the measurement date under current market conditions (i.e., an exit price concept). Following is a description of the valuation methodologies used for the Corporation’s more significant instruments measured on a recurring basis at fair value, including the general classification of such instruments pursuant to the valuation hierarchy. Assets and Liabilities Measured at Fair Value on a Recurring Basis Investment Securities Available for Sale: Where quoted prices are available in an active market, investment securities are classified in Level 1 of the fair value hierarchy. If quoted market prices are not available for the specific security, then fair values are estimated by using pricing models, quoted prices of securities with similar characteristics, or discounted cash flows, with consideration given to the nature of the quote and the relationship of recently evidenced market activity to the fair value estimate, and are classified in Level 2 of the fair value hierarchy. Lastly, in certain cases where there is limited activity or less transparency around inputs to the estimated fair value, securities are classified within Level 3 of the fair value hierarchy. To validate the fair value estimates, assumptions, and controls, the Corporation looks to transactions for similar instruments and utilizes independent pricing provided by third party vendors or brokers and relevant market indices. While none of these sources are solely indicative of fair value, they serve as directional indicators for the appropriateness of the Corporation’s fair value estimates. The Corporation has determined that the fair value measures of its investment securities are classified predominantly within Level 2 of the fair value hierarchy. See Note 6 for additional disclosure regarding the Corporation’s investment securities. Equity Securities with Readily Determinable Fair Values: The Corporation's portfolio of equity securities with readily determinable fair values is primarily comprised of CRA Qualified Investment mutual funds. Since quoted prices for the Corporation's equity securities are readily available in an active market, they are classified within Level 1 of the fair value hierarchy. See Note 6 for additional disclosure regarding the Corporation’s equity securities. Residential Loans Held for Sale: Residential loans held for sale, which consist generally of current production of certain fixed-rate, first-lien residential mortgage loans, are carried at estimated fair value. Management has elected the fair value option to account for all newly originated mortgage loans held for sale, which results in the financial impact of changing market conditions being reflected currently in earnings as opposed to being dependent upon the timing of sales. Therefore, the continually adjusted values better reflect the price the Corporation expects to receive from the sale of such loans. The estimated fair value is based on what secondary markets are currently offering for portfolios with similar characteristics, which the Corporation classifies as a Level 2 fair value measurement. Derivative Financial Instruments (Interest Rate-Related Instruments): The Corporation offers interest rate-related instruments (swaps and caps) to service its customers’ needs, for which the Corporation simultaneously enters into offsetting derivative financial instruments (i.e., mirror interest rate-related instruments) with third parties to manage its interest rate risk associated with these financial instruments. The valuation of the Corporation’s derivative financial instruments is determined using discounted cash flow analysis on the expected cash flows of each derivative and also includes a nonperformance / credit risk component (credit valuation adjustment). See Note 10 for additional disclosure regarding the Corporation’s interest rate-related instruments. The discounted cash flow analysis component in the fair value measurement reflects the contractual terms of the derivative financial instruments, including the period to maturity, and uses observable market-based inputs, including interest rate curves and implied volatilities. More specifically, the fair values of interest rate swaps are determined using the market standard methodology of netting the discounted future fixed cash receipts (or payments) with the variable cash payments (or receipts) based on an expectation of future interest rates (forward curves) derived from observable market interest rate curves. Likewise, the fair values of interest rate options (i.e., interest rate caps) are determined using the market standard methodology of discounting the future expected cash receipts that would occur if variable interest rates fall below (or rise above) the strike rate of the floors (or caps), with the variable interest rates used in the calculation of projected receipts on the floor (or cap) based on an expectation of future interest rates derived from observable market interest rate curves and volatilities. The Corporation also incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of its derivative financial instruments for the effect of nonperformance risk, the Corporation has considered the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts, and guarantees. While the Corporation has determined that the majority of the inputs used to value its interest rate-related derivative financial instruments fall within Level 2 of the fair value hierarchy, the credit valuation adjustments utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by itself and its counterparties. The Corporation has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions as of March 31, 2020 and December 31, 2019, and has determined that the credit valuation adjustments are not significant to the overall valuation of its derivative financial instruments. Therefore, the Corporation has determined that the fair value measures of its derivative financial instruments in their entirety are classified within Level 2 of the fair value hierarchy. Derivative Financial Instruments (Foreign Currency Exchange Forwards): The Corporation provides foreign currency exchange services to customers. In addition, the Corporation may enter into a foreign currency exchange forward to mitigate the exchange rate risk attached to the cash flows of a loan or as an offsetting contract to a forward entered into as a service to its customer. The valuation of the Corporation’s foreign currency exchange forwards is determined using quoted prices of foreign currency exchange forwards with similar characteristics, with consideration given to the nature of the quote and the relationship of recently evidenced market activity to the fair value estimate, and is classified within Level 2 of the fair value hierarchy. See Note 10 for additional disclosures regarding the Corporation’s foreign currency exchange forwards. Derivative Financial Instruments (Commodity Contracts): The Corporation enters into commodity contracts to manage commercial customers' exposure to fluctuating commodity prices, for which the Corporation simultaneously enters into offsetting derivative financial instruments (i.e., mirror commodity contracts) with third parties to manage its risk associated with these financial instruments. The valuation of the Corporation’s commodity contracts is determined using quoted prices of the underlying instruments, and also includes a nonperformance / credit risk component (credit valuation adjustment). See Note 10 for additional disclosures regarding the Corporation’s commodity contracts. The Corporation also incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of its derivative financial instruments for the effect of nonperformance risk, the Corporation has considered the impact of netting and any applicable credit enhancements, such as collateral postings. While the Corporation has determined that the majority of the inputs used to value its derivative financial instruments fall within Level 2 of the fair value hierarchy, the credit valuation adjustments utilize Level 3 inputs, such as probability of default and loss given default of the underlying loans to evaluate the likelihood of default by itself and its counterparties. The Corporation has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions as of March 31, 2020 and December 31, 2019, and has determined that the credit valuation adjustments are not significant to the overall valuation of its derivative financial instruments. Therefore, the Corporation has determined that the fair value measures of its derivative financial instruments in their entirety are classified within Level 2 of the fair value hierarchy. The table below presents the Corporation’s financial instruments measured at fair value on a recurring basis as of March 31, 2020 and December 31, 2019, aggregated by the level in the fair value hierarchy within which those measurements fall: ($ in Thousands) Fair Value Hierarchy March 31, 2020 December 31, 2019 Assets Investment securities available for sale U.S. government SBA agency securities Level 2 $ 10,238 $ — Obligations of state and political subdivisions (municipal securities) Level 2 508,636 546,160 Residential mortgage-related securities FNMA / FHLMC Level 2 104,485 132,660 GNMA Level 2 823,787 985,139 Commercial mortgage-related securities FNMA / FHLMC Level 2 22,773 21,728 GNMA Level 2 1,114,443 1,310,207 FFELP asset backed securities Level 2 341,424 263,693 Other debt securities Level 2 3,000 3,000 Total investment securities available for sale Level 2 2,928,787 3,262,586 Equity securities with readily determinable fair values Level 1 1,618 1,646 Residential loans held for sale Level 2 366,330 136,280 Interest rate-related instruments (a) Level 2 220,445 77,024 Foreign currency exchange forwards (a) Level 2 9,272 4,226 Commodity contracts (a) Level 2 69,241 20,528 Interest rate lock commitments to originate residential mortgage loans held for sale Level 3 12,454 2,527 Liabilities Interest rate-related instruments (a) Level 2 $ 30,449 $ 13,073 Foreign currency exchange forwards (a) Level 2 9,215 4,048 Commodity contracts (a) Level 2 67,592 19,624 Forward commitments to sell residential mortgage loans Level 3 10,972 710 (a) Figures are presented gross before netting. See Note 10 and Note 11 for information relating to the impact of offsetting derivative assets and liabilities and cash collateral with the same counterparty where there is a legally enforceable master netting agreement in place. The table below presents a rollforward of the consolidated balance sheets amounts for the three months ended March 31, 2020 and the year ended December 31, 2019, for the Corporation's mortgage derivatives measured on a recurring basis and classified within Level 3 of the fair value hierarchy: ($ in Thousands) Derivative Financial Balance December 31, 2018 $ 140 Total net gains (losses) included in income Mortgage derivative gain (loss) 1,681 Balance December 31, 2019 $ 1,817 Total net gains (losses) included in income Mortgage derivative gain (loss) (334) Balance March 31, 2020 $ 1,482 For Level 3 assets and liabilities measured at fair value on a recurring basis as of March 31, 2020, the Corporation utilized the following valuation techniques and significant unobservable inputs: Derivative Financial Instruments (Mortgage Derivative — Interest Rate Lock Commitments to Originate Residential Mortgage Loans Held for Sale): The fair value is determined by the change in value from each loan’s rate lock date to the expected rate lock expiration date based on the underlying loan attributes, estimated closing ratios, and investor price matrix determined to be reasonably applicable to each loan commitment. The closing ratio calculation takes into consideration historical experience and loan-level attributes, particularly the change in the current interest rates from the time of initial rate lock. The closing ratio is periodically reviewed for reasonableness and reported to the Associated Mortgage Risk Management Committee. At March 31, 2020, the closing ratio was 83%. Derivative Financial Instruments (Mortgage Derivative — Forward Commitments to Sell Mortgage Loans): Mortgage derivatives include forward commitments to deliver closed-end residential mortgage loans into conforming Agency MBS or conforming Cash Forward sales. The fair value of such instruments is determined by the difference of current market prices for such traded instruments or available from forward cash delivery commitments and the original traded price for such commitments. The Corporation also relies on an internal valuation model to estimate the fair value of its forward commitments to sell residential mortgage loans (i.e., an estimate of what the Corporation would receive or pay to terminate the forward delivery contract based on market prices for similar financial instruments), which includes matching specific terms and maturities of the forward commitments against applicable investor pricing available. While there are Level 2 and 3 inputs used in the valuation models, the Corporation has determined that the majority of the inputs significant in the valuation of both of the mortgage derivatives fall within Level 3 of the fair value hierarchy. See Note 10 for additional disclosure regarding the Corporation’s mortgage derivatives. Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis Following is a description of the valuation methodologies used for the Corporation’s more significant instruments measured on a nonrecurring basis at the lower of amortized cost or estimated fair value, including the general classification of such instruments pursuant to the valuation hierarchy. Commercial Loans Held for Sale: Commercial loans held for sale are carried at the lower of cost or estimated fair value. The estimated fair value is based on a discounted cash flow analysis, which the Corporation classifies as a Level 2 nonrecurring fair value measurement. OREO: Certain OREO, upon initial recognition, was re-measured and reported at fair value through a charge off to the allowance for loan losses based upon the estimated fair value of the OREO, less estimated selling costs. The fair value of OREO, upon initial recognition or subsequent impairment, was estimated using appraised values or a broker opinion of value, which the Corporation classifies as a Level 2 nonrecurring fair value measurement. For Level 3 assets and liabilities measured at fair value on a nonrecurring basis as of March 31, 2020, the Corporation utilized the following valuation techniques and significant unobservable inputs: Individually Evaluated Loans: The Corporation individually evaluates loans when a commercial loan relationship is in nonaccrual status or when a commercial and consumer loan relationship has its terms restructured in a TDR or when a loan meets the Corporation's definition of a probable TDR. Prior to January 1, 2020, management considered a loan impaired when it was probable that the Corporation would be unable to collect all amounts due according to the original contractual terms of the note agreement, including both principal and interest. See Note 7 for additional information regarding the Corporation’s individually evaluated loans. Mortgage Servicing Rights: MSRs do not trade in an active, open market with readily observable prices. While sales of MSRs do occur, the precise terms and conditions typically are not readily available to allow for a “quoted price for similar assets” comparison. Accordingly, the Corporation utilizes an independent valuation from a third party which uses a discounted cash flow model to estimate the fair value of its MSRs. The valuation model incorporates prepayment assumptions to project MSRs cash flows based on the current interest rate scenario, which is then discounted to estimate an expected fair value of the MSRs. The valuation model considers portfolio characteristics of the underlying mortgages, contractually specified servicing fees, prepayment assumptions, discount rate assumptions, delinquency rates, late charges, other ancillary revenue, costs to service, and other economic factors. The Corporation periodically reviews and assesses the underlying inputs and assumptions used in the model. In addition, the Corporation compares its fair value estimates and assumptions to observable market data for MSRs, where available, and to recent market activity and actual portfolio experience. Due to the nature of the valuation inputs, MSRs are classified within Level 3 of the fair value hierarchy. The Corporation uses the amortization method (i.e., lower of amortized cost or estimated fair value measured on a nonrecurring basis), not fair value measurement accounting, for its MSRs assets. The discounted cash flow analyses that generate expected market prices utilize the observable characteristics of the MSRs portfolio, as well as certain unobservable valuation parameters. The significant unobservable inputs used in the fair value measurement of the Corporation’s MSRs are the weighted average constant prepayment rate and weighted average discount rate. Significant increases (decreases) in either of those inputs in isolation could result in a significantly lower (higher) fair value measurement. These parameter assumptions fall within a range that the Corporation, in consultation with an independent third party, believes purchasers of servicing would apply to such portfolios sold into the current secondary servicing market. Discussions are held with members from Treasury and the Community, Consumer, and Business segment to reconcile the fair value estimates and the key assumptions used by the respective parties in arriving at those estimates. The Associated Mortgage Risk Management Committee is responsible for providing control over the valuation methodology and key assumptions. To assess the reasonableness of the fair value measurement, the Corporation also compares the fair value and constant prepayment rate to a value calculated by an independent third party on an annual basis. See Note 8 for additional disclosure regarding the Corporation’s MSRs. Equity Securities Without Readily Determinable Fair Values: The Corporation measures equity securities without readily determinable fair values at cost less impairment (if any), plus or minus observable price changes from an identical or similar investment of the same issuer, with such changes recognized in earnings. Included in equity securities without readily determinable fair values are 77,996 Visa Class B restricted shares, 77,000 of which the Corporation received in 2008 as part of Visa's initial public offering, carried at fair value after the Corporation donated 42,039 Visa Class B restricted shares to the Corporation's Charitable Remainder Trust during the second quarter of 2019, with the subsequent sale of those shares resulting in an observable market price after the shares were previously carried at a zero cost basis. During the first quarter of 2020, the Corporation also acquired 996 Visa Class B restricted shares from the acquisition of First Staunton, and those shares are currently carried at a zero cost basis due to the lack of an observable market price since the time of acquisition. The Visa Class B restricted shares are currently subject to certain transfer restrictions and will be convertible into Visa Class A shares upon final resolution of certain litigation matters involving Visa. Based on the current conversion factor, the Corporation expects 77,996 shares of Visa Class B to convert to 126,572 shares of Visa Class A upon the litigation resolution. In its determination of the new carrying values upon observable price changes, the Corporation will adjust the prices if deemed necessary to arrive at the Corporation's estimated fair values. Such adjustments may include adjustments to reflect the different rights and obligations of similar securities and other adjustments. See Note 6 for additional disclosure regarding the Corporation’s equity securities without readily determinable fair values. The following table presents the carrying value of equity securities without readily determinable fair values still held as of March 31, 2020 that are measured under the measurement alternative and the related adjustments recorded during the periods presented for those securities with observable price changes. These securities are included in the nonrecurring fair value tables when applicable price changes are observable. Also shown are the cumulative upward and downward adjustments for the Corporation's equity securities without readily determinable fair values as of March 31, 2020: ($ in Thousands) Equity securities without readily determinable fair values Carrying value as of December 31, 2019 $ 13,444 Carrying value changes — Carrying value as of March 31, 2020 $ 13,444 Cumulative upward carrying value changes between January 1, 2018 and March 31, 2020 $ 13,444 Cumulative downward carrying value changes/impairment between January 1, 2018 and March 31, 2020 $ — The table below presents the Corporation’s assets measured at fair value on a nonrecurring basis, aggregated by the level in the fair value hierarchy within which those measurements fall: Consolidated Statements of Income Adjustment Recognized on the Consolidated Statements of Income ($ in Thousands) Fair Value Hierarchy Fair Value March 31, 2020 Assets Individually evaluated loans (a) Level 3 $ 103,108 Provision for credit losses $ (23,840) OREO (b) Level 2 1,382 Other noninterest expense (806) Mortgage servicing rights Level 3 58,311 Mortgage banking, net (9,098) Equity securities Level 3 13,444 Investment securities gains (losses), net — December 31, 2019 Assets Impaired loans (c) Level 3 $ 45,792 Provision for credit losses (d) $ (66,172) OREO (b) Level 2 3,565 Other noninterest expense (1,860) Mortgage servicing rights Level 3 72,532 Mortgage banking, net (63) Equity securities Level 3 13,444 Investment securities gains (losses), net 13,444 (a) Includes probable TDRs which are individually analyzed, net of the related allowance for loan losses. (b) If the fair value of the collateral exceeds the carrying amount of the asset, no charge off or adjustment is necessary, the asset is not considered to be carried at fair value, and is therefore not included in the table. (c) Represents individually evaluated impaired loans, net of the related allowance for loan losses. (d) Represents provision for credit losses on individually evaluated impaired loans. Certain nonfinancial assets and nonfinancial liabilities measured at fair value on a nonrecurring basis include the fair value analysis in the goodwill impairment test, and intangible assets and other nonfinancial long-lived assets measured at fair value for impairment assessment. The Corporation's significant Level 3 measurements which employ unobservable inputs that are readily quantifiable pertain to MSRs and individually evaluated loans. The table below presents information about these inputs and further discussion is found above: March 31, 2020 Valuation Technique Significant Unobservable Input Range of Inputs Weighted Average Input Applied Mortgage servicing rights Discounted cash flow Discount rate 9% - 14% 9% Mortgage servicing rights Discounted cash flow Constant prepayment rate 7% - 31% 15% Individually evaluated loans Appraisals / Discounted cash flow Collateral / Discount factor 5% - 67% 44% Fair Value of Financial Instruments The Corporation is required to disclose estimated fair values for its financial instruments. Fair value estimates are set forth below for the Corporation’s financial instruments: March 31, 2020 December 31, 2019 Fair Value Hierarchy Level Carrying Amount Fair Value Carrying Amount Fair Value ($ in Thousands) Financial assets Cash and due from banks Level 1 $ 480,337 $ 480,337 $ 373,380 $ 373,380 Interest-bearing deposits in other financial institutions Level 1 176,440 176,440 207,624 207,624 Federal funds sold and securities purchased under agreements to resell Level 1 22,455 22,455 7,740 7,740 Investment securities held to maturity, net Level 1 999 1,041 999 1,018 Investment securities held to maturity, net Level 2 2,148,373 2,246,451 2,204,084 2,275,447 Investment securities available for sale Level 2 2,928,787 2,928,787 3,262,586 3,262,586 Equity securities with readily determinable fair values Level 1 1,618 1,618 1,646 1,646 Equity securities without readily determinable fair values Level 3 13,444 13,444 13,444 13,444 FHLB and Federal Reserve Bank stocks Level 2 222,922 222,922 227,347 227,347 Residential loans held for sale Level 2 366,330 366,330 136,280 136,280 Commercial loans held for sale Level 2 — — 15,000 15,000 Loans, net Level 3 24,027,841 24,072,251 22,620,068 22,399,621 Bank and corporate owned life insurance Level 2 674,026 674,026 671,948 671,948 Derivatives (other assets) (a) Level 2 298,958 298,958 101,778 101,778 Interest rate lock commitments to originate residential mortgage loans held for sale (other assets) Level 3 12,454 12,454 2,527 2,527 Financial liabilities Noninterest-bearing demand, savings, interest-bearing demand, and money market accounts Level 3 $ 23,028,235 $ 23,028,235 $ 21,156,261 $ 21,156,261 Brokered CDs and other time deposits (b) Level 2 2,633,345 2,650,937 2,622,803 2,622,803 Short-term funding (c) Level 2 166,654 166,654 465,113 465,113 Long-term funding Level 2 549,644 606,233 549,343 588,774 FHLB advances Level 2 3,214,194 3,394,222 3,180,967 3,207,793 Standby letters of credit (d) Level 2 2,644 2,644 2,710 2,710 Derivatives (accrued expenses and other liabilities) (a) Level 2 107,255 107,255 36,745 36,745 Forward commitments to sell residential mortgage loans (accrued expenses and other liabilities) Level 3 10,972 10,972 710 710 (a) Figures are presented gross before netting. See Note 10 and Note 11 for information relating to the impact of offsetting derivative assets and liabilities and cash collateral with the same counterparty where there is a legally enforceable master netting agreement in place. (b) When the estimated fair value is less than the carrying value, the carrying value is reported as the fair value. (c) The carrying amount is a reasonable estimate of fair value for existing short-term funding. (d) The commitment on standby letters of credit was $265 million at March 31, 2020 and $278 million at December 31, 2019. See Note 12 for additional information on the standby letters of credit and for information on the fair value of lending-related commitments.

Retirement Plans

Retirement Plans	3 Months Ended
	Mar. 31, 2020
Defined Benefit Plan [Abstract]
Retirement Plans	Retirement Plans The Corporation has a noncontributory defined benefit retirement account plan, the RAP, covering substantially all employees who meet participation requirements. The benefits are based primarily on years of service and the employee’s compensation paid. Employees of acquired entities generally participate in the RAP after consummation of the business combinations. Any retirement plans of acquired entities are typically merged into the RAP after completion of the mergers, and credit is usually given to employees for years of service at the acquired institution for vesting and eligibility purposes. The Corporation also provides legacy healthcare access to a limited group of retired employees from a previous acquisition in the Postretirement Plan. There are no other active retiree healthcare plans. The Huntington branch acquisition closed on June 14, 2019, and the employees gained as a result of the transaction became eligible to participate in the RAP on the same date, with their vesting service credit based on their prior hours of service with Huntington. See Note 2 for additional information on the Huntington branch acquisition. The First Staunton acquisition closed on February 14, 2020, and the employees who met the required criteria as a result of the transaction became eligible to participate in the RAP on February 15, 2020, with their vesting service credit based on their prior hours of service with First Staunton. See Note 2 for additional information on the First Staunton acquisition. The components of net periodic pension cost and net periodic benefit cost for the RAP and Postretirement Plan for the three months ended March 31, 2020 and 2019 were as follows: Three Months Ended March 31, ($ in Thousands) 2020 2019 Components of Net Periodic Benefit Cost RAP Service cost $ 2,165 $ 1,925 Interest cost 2,008 2,413 Expected return on plan assets (6,405) (6,075) Amortization of prior service cost (19) (19) Amortization of actuarial loss (gain) 808 65 Total net periodic pension cost $ (1,444) $ (1,691) Postretirement Plan Interest cost $ 20 $ 26 Amortization of prior service cost (19) (19) Amortization of actuarial loss (gain) — (1) Total net periodic benefit cost $ 1 $ 6 The components of net periodic pension cost and net periodic benefit cost, other than the service cost component, are included in the line item other of noninterest expense on the consolidated statements of income. The service cost components are included in personnel on the consolidated statements of income. The Corporation’s funding policy is to pay at least the minimum amount required by federal law and regulations, with consideration given to the maximum funding amounts allowed. The Corporation regularly reviews the funding of its RAP. There were no contributions during the three months ended March 31, 2020 and 2019.

Segment Reporting

Segment Reporting	3 Months Ended
	Mar. 31, 2020
Segment Reporting [Abstract]
Segment Reporting	Segment Reporting The Corporation utilizes a risk-based internal profitability measurement system to provide strategic business unit reporting. The profitability measurement system is based on internal management methodologies designed to produce consistent results and reflect the underlying economics of the units. Certain strategic business units have been combined for segment information reporting purposes where the nature of the products and services, the type of customer and the distribution of those products and services are similar. The three reportable segments are Corporate and Commercial Specialty; Community, Consumer, and Business; and Risk Management and Shared Services. The financial information of the Corporation’s segments has been compiled utilizing the accounting policies described in the Corporation’s 2019 Annual Report on Form 10-K and Note 3 in this Quarterly Report on Form 10-Q, with certain exceptions. The more significant of these exceptions are described herein. The reportable segment results are presented based on the Corporation's internal management accounting process. The management accounting policies and processes utilized in compiling segment financial information are highly subjective and, unlike financial accounting, are not based on authoritative guidance similar to U.S. GAAP. As a result, reported segments and the financial information of the reported segments are not necessarily comparable with similar information reported by other financial institutions. Furthermore, changes in management structure or allocation methodologies and procedures may result in changes in previously reported segment financial data. Additionally, the information presented is not indicative of how the segments would perform if they operated as independent entities. To determine financial performance of each segment, the Corporation allocates FTP assignments, the provision for credit losses, certain noninterest expenses, income taxes, and equity to each segment. Allocation methodologies are subject to periodic adjustment as the internal management accounting system is revised, the interest rate environment evolves, and business or product lines within the segments change. Also, because the development and application of these methodologies is a dynamic process, the financial results presented may be periodically reviewed. The Corporation allocates net interest income using an internal FTP methodology that charges users of funds (assets) and credits providers of funds (liabilities, primarily deposits) based on the maturity, prepayment and / or repricing characteristics of the assets and liabilities. The net effect of this allocation is offset in the Risk Management and Shared Services segment to ensure consolidated totals reflect the Corporation's net interest income. The net FTP allocation is reflected as net intersegment income (expense) in the accompanying tables. A credit provision is allocated to segments based on the expected long-term annual net charge off rates attributable to the credit risk of loans managed by the segment during the period. In contrast, the level of the consolidated provision for credit losses is determined based on an allowance model using the methodologies described in Note 3 in this Quarterly Report on Form 10-Q. The net effect of the credit provision is recorded in Risk Management and Shared Services. Indirect expenses incurred by certain centralized support areas are allocated to segments based on actual usage (for example, volume measurements) and other criteria. Certain types of administrative expense and bank-wide expense accruals (including amortization of CDIs and other intangible assets associated with acquisitions and acquisition-related costs) are generally not allocated to segments. Income taxes are allocated to segments based on the Corporation’s estimated effective tax rate, with certain segments adjusted for any tax-exempt income or non-deductible expenses. Equity is allocated to the segments based on regulatory capital requirements and in proportion to an assessment of the inherent risks associated with the business of the segment (including interest, credit and operating risk). A brief description of each business segment is presented below. A more in-depth discussion of these segments can be found in the Segment Reporting footnote in the Corporation’s 2019 Annual Report on Form 10-K. The Corporate and Commercial Specialty segment serves a wide range of customers including larger businesses, developers, not-for-profits, municipalities, and financial institutions by providing lending and deposit solutions as well as the support to deliver, fund, and manage such banking solutions. In addition, this segment provides a variety of investment and fiduciary products and services to individuals and small to mid-sized businesses. The Community, Consumer, and Business segment serves individuals, as well as small and mid-sized businesses by providing lending, deposit solutions, and ancillary financial services, primarily insurance and risk consulting. The Risk Management and Shared Services segment includes key shared operational functions and also includes residual revenue and expenses, representing the difference between actual amounts incurred and the amounts allocated to operating segments, including interest rate risk residuals (FTP mismatches) and credit risk and provision residuals (long-term credit charge mismatches). All First Staunton and Huntington branch acquisition related costs are included in the Risk Management and Shared Services segment. During the first quarter of 2020, the Corporation reassigned goodwill of approximately $4 million to the Corporate and Commercial Specialty segment from the Community, Consumer and Business segment as a result of a reorganization of the investment and fiduciary businesses. The goodwill reassigned was attributable to the Corporation's acquisition of Whitnell & Co. in 2017. Also effective in the first quarter of 2020, the marketing business unit, formerly part of the Risk Management and Shared Services segment, was reorganized under the Community, Consumer and Business segment. Information about the Corporation’s segments is presented below: Corporate and Commercial Specialty Three Months Ended March 31, ($ in Thousands) 2020 2019 Net interest income $ 113,478 $ 124,294 Net intersegment interest income (expense) (12,336) (19,927) Segment net interest income 101,141 104,368 Noninterest income 34,802 27,394 Total revenue 135,943 131,762 Credit provision 13,174 13,833 Noninterest expense 52,598 56,340 Income (loss) before income taxes 70,172 61,589 Income tax expense (benefit) 13,126 11,920 Net income $ 57,046 $ 49,669 Allocated goodwill $ 530,144 $ 528,832 Community, Consumer, and Business Three Months Ended March 31, ($ in Thousands) 2020 2019 Net interest income $ 74,927 $ 79,686 Net intersegment interest income (expense) 18,685 20,747 Segment net interest income 93,612 100,433 Noninterest income 57,650 58,275 Total revenue 151,262 158,708 Credit provision 5,108 4,685 Noninterest expense 116,431 112,917 Income (loss) before income taxes 29,723 41,106 Income tax expense (benefit) 6,242 8,632 Net income $ 23,481 $ 32,473 Allocated goodwill $ 661,244 $ 640,112 Risk Management and Shared Services Three Months Ended March 31, ($ in Thousands) 2020 2019 Net interest income $ 14,537 $ 11,567 Net intersegment interest income (expense) (6,349) (821) Segment net interest income 8,188 10,746 Noninterest income 5,854 5,533 Total revenue 14,042 16,280 Credit provision 34,719 (12,518) Noninterest expense (a) 23,162 22,414 Income (loss) before income taxes (43,838) 6,384 Income tax expense (benefit) (9,149) 1,840 Net income $ (34,689) $ 4,543 Allocated goodwill $ — $ — Consolidated Total Three Months Ended March 31, ($ in Thousands) 2020 2019 Net interest income $ 202,942 $ 215,547 Net intersegment interest income (expense) — — Segment net interest income 202,942 215,547 Noninterest income 98,306 91,202 Total revenue 301,248 306,749 Credit provision 53,001 6,000 Noninterest expense 192,191 191,671 Income (loss) before income taxes 56,056 109,078 Income tax expense (benefit) 10,219 22,392 Net income $ 45,838 $ 86,686 Allocated goodwill $ 1,191,388 $ 1,168,944 (a) For the three months ended both March 31, 2020 and 2019, the Risk Management and Shared Services segment included $2 million and approximately $632,000 of acquisition related noninterest expense.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	3 Months Ended
	Mar. 31, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) The following tables summarize the components of accumulated other comprehensive income (loss) at March 31, 2020 and 2019, including changes during the preceding three month periods as well as any reclassifications out of accumulated other comprehensive income (loss): ($ in Thousands) Investment Defined Benefit Accumulated Balance December 31, 2019 $ 3,989 $ (37,172) $ (33,183) Other comprehensive income (loss) before reclassifications 26,419 — 26,419 Amounts reclassified from accumulated other comprehensive income (loss) Investment securities losses (gains), net (6,118) — (6,118) Personnel expense — (38) (38) Other expense — 808 808 Interest income 556 — 556 Income tax (expense) benefit (5,225) (193) (5,418) Net other comprehensive income (loss) during period 15,632 577 16,209 Balance March 31, 2020 $ 19,620 $ (36,595) $ (16,974) Balance December 31, 2018 $ (75,643) $ (49,330) $ (124,972) Other comprehensive income (loss) before reclassifications 30,490 — 30,490 Amounts reclassified from accumulated other comprehensive income (loss) Investment securities losses (gains), net (1,680) — (1,680) Personnel expense — (38) (38) Other expense — 64 64 Interest income 69 — 69 Income tax (expense) benefit (7,301) (7) (7,308) Net other comprehensive income (loss) during period 21,578 20 21,597 Balance March 31, 2019 $ (54,065) $ (49,310) $ (103,375)

Revenue from Contracts with Cus

Revenue from Contracts with Customers	3 Months Ended
	Mar. 31, 2020
Revenue Recognition [Abstract]
Revenue from Contracts with Customers	Revenue from Contracts with Customers Revenue from contracts with customers is recognized when obligations under the terms of a contract with the Corporation's customer are satisfied. Revenue is measured as the amount of consideration we expect to receive in exchange for transferring goods or providing services. We do not have any material significant payment terms as payment is received at or shortly after the satisfaction of the performance obligation. The Corporation's disaggregated revenue by major source is presented below: Corporate and Commercial Specialty Three Months Ended March 31, ($ in Thousands) 2020 2019 Insurance commissions and fees $ 76 $ 125 Wealth management fees (a) 15,806 15,099 Service charges and deposit account fees 3,551 3,498 Card-based fees (b) 515 434 Other revenue 788 293 Noninterest Income (in-scope of Topic 606) $ 20,736 $ 19,449 Noninterest Income (out-of-scope of Topic 606) 14,066 7,945 Total Noninterest Income $ 34,802 $ 27,394 Community, Consumer, and Business Three Months Ended March 31, ($ in Thousands) 2020 2019 Insurance commissions and fees $ 22,529 $ 25,336 Wealth management fees (a) 5,010 5,080 Service charges and deposit account fees 11,665 11,599 Card-based fees (b) 9,045 8,812 Other revenue 2,286 2,271 Noninterest Income (in-scope of Topic 606) $ 50,535 $ 53,098 Noninterest Income (out-of-scope of Topic 606) 7,115 5,177 Total Noninterest Income $ 57,650 $ 58,275 Risk Management and Shared Services Three Months Ended March 31, ($ in Thousands) 2020 2019 Insurance commissions and fees $ 3 $ 3 Wealth management fees (a) — — Service charges and deposit account fees 5 19 Card-based fees (b) 47 49 Other revenue 23 120 Noninterest Income (in-scope of Topic 606) $ 77 $ 191 Noninterest Income (out-of-scope of Topic 606) 5,777 5,342 Total Noninterest Income $ 5,854 $ 5,533 Consolidated Total Three Months Ended March 31, ($ in Thousands) 2020 2019 Insurance commissions and fees $ 22,608 $ 25,464 Wealth management fees (a) 20,816 20,180 Service charges and deposit account fees 15,222 15,115 Card-based fees (b) 9,607 9,295 Other revenue 3,096 2,684 Noninterest Income (in-scope of Topic 606) $ 71,348 $ 72,738 Noninterest Income (out-of-scope of Topic 606) 26,958 18,465 Total Noninterest Income $ 98,306 $ 91,202 (a) Includes trust, asset management, brokerage, and annuity fees. (b) Certain card-based fees are out-of-scope of Topic 606. Below is a listing of performance obligations for the Corporation's main revenue streams: Revenue Stream Noninterest income in-scope of Topic 606 Insurance commissions and fees The Corporation's insurance revenue has two distinct performance obligations. The first performance obligation is the selling of the policy as an agent for the carrier. This performance obligation is satisfied upon binding of the policy. The second performance obligation is the ongoing servicing of the policy which is satisfied over the life of the policy. For employee benefits, the payment is typically received monthly. For property and casualty, payments can vary, but are typically received at, or in advance, of the policy period. Service charges and deposit account fees Service charges and deposit account fees consist of monthly service fees (i.e. business analyzed fees and consumer service charges) and other deposit account related fees. The Corporation's performance obligation for monthly service fees is generally satisfied, and the related revenue recognized, over the period in which the service is provided. Other deposit account related fees are largely transactional based, and therefore, the Corporation's performance obligation is satisfied, and related revenue recognized, at a point in time. Payment for service charges and deposit account fees are primarily received immediately or in the following month through a direct charge to customers’ accounts. Card-based fees (a) Card-based fees are primarily comprised of debit and credit card income, ATM fees, and merchant services income. Debit and credit card income is primarily comprised of interchange fees earned whenever the Corporation's debit and credit cards are processed through card payment networks. ATM and merchant fees are largely transactional based, and therefore, the Corporation's performance obligation is satisfied, and related revenue recognized, at a point in time. Payment is typically received immediately or in the following month. Trust and asset management fees (b) Trust and asset management income is primarily comprised of fees earned from the management and administration of trusts and other customer assets. The Corporation's performance obligation is generally satisfied over time and the resulting fees are recognized monthly, based upon the month-end market value of the assets under management and the applicable fee rate. Payment is generally received a few days after month end through a direct charge to the customers’ accounts. The Corporation's performance obligation for these transactional-based services is generally satisfied, and related revenue recognized, at a point in time (i.e., as incurred). Payment is received shortly after services are rendered. Brokerage commissions and fees (b) Brokerage commissions and fees primarily consist of investment advisory, brokerage, retirement services, and annuities. The Corporation's performance obligation for investment advisory services and retirement services is generally satisfied, and the related revenue recognized, over the period in which the services are provided. The performance obligation for annuities is satisfied upon sale of the annuity, and therefore, the related revenue is primarily recognized at the time of sale. Payments for these services are typically received immediately or in advance of the service. (a) Certain card-based fees are out-of-scope of Topic 606. (b) Trust and asset management fees and brokerage commissions and fees are included in wealth management fees. Arrangements with Multiple Performance Obligations The Corporation's contracts with customers may include multiple performance obligations. For such arrangements, we allocate revenue to each performance obligation based on its relative standalone selling price. We generally determine standalone selling prices based on the expected cost plus margin. Practical Expedients We do not disclose the value of unsatisfied performance obligations for contracts with an original expected length of one year or less. Using the practical expedient, for contracts with a term of one year or less, the Corporation recognizes incremental costs of obtaining those contracts as an expense when incurred.

Leases

Leases	3 Months Ended
	Mar. 31, 2020
Leases [Abstract]
Leases	Leases The Corporation has operating leases for retail and corporate offices, land, and equipment. The Corporation also has a finance lease for land. These operating leases have original terms of 1 year or longer with remaining maturities up to 43 years, some of which include options to extend the lease term. An analysis of the lease options has been completed and any purchase options or optional periods that the Corporation is reasonably likely to extend have been included in the capitalization. The discount rate used to capitalize the operating leases is the Corporation's FHLB borrowing rate on the date of lease commencement. When determining the rate to discount specific lease obligations, the repayment period and term are considered. Operating and finance lease costs and cash flows resulting from these leases are presented below: ($ in Thousands) Three Months Ended March 31, 2020 Three Months Ended March 31, 2019 Operating Lease Costs $ 2,623 $ 2,905 Finance Lease Costs 36 — Operating Lease Cash Flows 2,731 2,809 Finance Lease Cash Flows 21 — The lease classifications on the consolidated balance sheets were as follows: March 31, 2020 December 31, 2019 ($ in Thousands) Consolidated Balance Sheets Category Amount Operating lease right-of-use asset Premises and equipment $ 43,321 $ 45,381 Finance lease right-of-use asset Other assets 2,174 2,188 Operating lease liability Accrued expenses and other liabilities 47,136 49,292 Finance lease liability Other long-term funding 2,210 2,209 The lease payment obligations, weighted-average remaining lease term, and weighted-average discount rate were as follows: March 31, 2020 December 31, 2019 ($ in Thousands) Lease payments Weighted-average lease term (in years) Weighted-average discount rate Lease payments Weighted-average lease term (in years) Weighted-average discount rate Operating leases Equipment $ 37 0.81 2.72 % $ 46 0.83 2.72 % Retail and corporate offices 46,476 6.37 3.34 % 48,940 6.49 3.34 % Land 6,533 9.32 3.20 % 6,594 9.57 3.21 % Total operating leases $ 53,046 6.71 3.33 % $ 55,580 6.83 3.32 % Finance leases Land $ 4,805 39.42 3.99 % $ 4,827 39.67 3.99 % Total finance leases $ 4,805 39.42 3.99 % $ 4,827 39.67 3.99 % Contractual lease payment obligations for each of the next five years and thereafter, in addition to a reconciliation to the Corporation’s lease liability, were as follows: ($ in Thousands) Operating Leases Finance Leases Amount Nine Months Ending December 31, 2020 $ 7,992 $ 64 $ 8,056 2021 10,203 85 10,288 2022 7,914 85 7,999 2023 5,696 85 5,781 2024 5,058 88 5,147 Beyond 2024 16,183 4,398 20,581 Total lease payments 53,046 4,805 57,851 Less: interest 5,910 2,595 8,506 Present value of lease payments $ 47,136 $ 2,210 $ 49,345

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2020
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Investment Securities	Investment Securities Management measures expected credit losses on held to maturity securities on a collective basis by major security type. Accrued interest receivable on held to maturity securities is excluded from the estimate of credit losses. The estimate of expected credit losses considers historical credit loss information that is adjusted for current conditions and reasonable and supportable forecasts and is included in investment securities held to maturity, net on the consolidated balance sheets. For available for sale securities the Corporation evaluates whether any decline in fair value has resulted from credit losses or other factors. In making this assessment, management considers the extent to which fair value is less than amortized cost, any changes to the rating of the security by a rating agency, and adverse conditions specifically related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for credit losses on investments is recorded for the credit loss, limited by the amount that the fair value is less than the amortized cost basis. Any impairment that has not been recorded through an allowance for credit losses on investments is recognized in other comprehensive income. Changes in the allowance for credit losses on investments are recorded as provision for, or reversal of, credit loss expense. Losses are charged against the allowance when management believes the available for sale security is uncollectible or when either of the criteria regarding intent or requirement to sell is met. Accrued interest receivable on available for sale debt securities is excluded from the estimate of credit losses.
Allowance for Loan Losses	Allowance for Credit Losses on Loans The level of the allowance for loan losses represents management's estimate of an amount appropriate to provide for lifetime credit losses in the loan portfolio at the balance sheet date. The allocation methodology applied by the Corporation, designed to assess the appropriateness of the allowance for loan losses, includes an allocation methodology, as well as management’s ongoing review and grading of the loan portfolio into criticized loan categories. The allocation methodology focuses on evaluation of several factors, including but not limited to: evaluation of facts and issues related to specific loans, management's ongoing review and grading of the loan portfolio using a dual risk rating system leveraging probability of default and loss given default, consideration of historical credit loss and delinquency experience on each portfolio category, trends in past due and nonaccrual loans, the level of potential problem loans, the risk characteristics of the various classifications of loans, changes in the size and character of the loan portfolio, concentrations of loans to specific borrowers or industries, existing economic conditions and economic forecasts, the fair value of underlying collateral, and other qualitative and quantitative factors which could affect potential loan losses. The Corporation utilizes the Moody's Baseline economic forecast in the allowance model and applies that forecast over a reasonable and supportable period with reversion to historical losses. For additional detail on the reasonable and supportable period and reversion methodology, see Note 7 Loans. Potential problem loans are generally defined by management to include loans rated as substandard by management. Assessing these numerous factors involves significant judgment. The provision for loan losses is predominantly a function of the result of the methodology and other qualitative and quantitative factors used to determine the allowance for loan losses. Management individually analyzes loans that do not share similar risk characteristics to other loans in the portfolio. Management has determined that commercial loan relationships that have nonaccrual status or commercial and retail loans that have had their terms restructured in a TDR meet this definition. Probable TDRs are loans the Corporation has reviewed individually to determine whether there is a high likelihood that the loans will default and will require restructuring in the near future. Probable TDRs could be classified as Pass, Special Mention, Substandard or Nonaccrual within the Corporation's credit quality analysis depending on the specific circumstances surrounding the individual credits. Accrued interest receivable on loans is excluded from the estimate of credit losses.
Allowance for Unfunded Commitments	The allowance for unfunded commitments leverages the same methodology utilized to measure the allowance for loan losses. The Corporation estimates expected credit losses over the contractual period in which the Corporation is exposed to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by the Corporation. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded over its estimated life. See Note 7 for additional information on the ACLL and Note 12 for additional information on the allowance for unfunded commitments.
Impact of adopting ASU 2016-13 Financial Instruments - Credit Losses (Topic 326)	Impact of adopting ASU 2016-13 Financial Instruments - Credit Losses (Topic 326) The following table illustrates the adoption impact: December 31, 2019 January 1, 2020 ($ in Thousands) Allowance for Loan Losses Allowance for Unfunded Commitments CECL Day 1 Adjustment ACLL Beginning Balance Commercial and industrial $ 91,133 $ 12,276 $ 48,921 $ 152,330 Commercial real estate - owner occupied 10,284 127 (1,851) 8,560 Commercial and business lending 101,417 12,403 47,070 160,890 Commercial real estate - investor 40,514 530 2,287 43,331 Real estate construction 24,915 7,532 25,814 58,261 Commercial real estate lending 65,428 8,062 28,101 101,591 Total Commercial 166,846 20,465 75,171 262,482 Residential mortgage 16,960 — 33,215 50,175 Home equity 10,926 1,038 14,240 26,204 Other consumer 6,639 405 8,520 15,564 Total consumer 34,525 1,443 55,975 91,943 Total loans $ 201,371 $ 21,907 $ 131,147 $ 354,425 The allowance for credit losses on held to maturity securities was approximately $61,000 at January 1, 2020, attributable entirely to the Corporation's municipal securities. At January 1, 2020, the adoption of ASU 2016-13 resulted in an increase to the allowance for loan losses of $112 million and an increase to the allowance for unfunded commitments of $19 million for a total increase to the ACLL of $131 million. A corresponding after tax decrease to common equity of $98 million was recorded along with a deferred tax asset of $33 million.
New Accounting Pronouncements Adopted	New Accounting Pronouncements Adopted Standard Description Date of adoption Effect on financial statements ASU 2016-13 Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments The FASB issued an amendment to replace the current incurred loss impairment methodology. Under the new guidance, entities will be required to measure expected credit losses by utilizing forward-looking information to assess an entity's ACL. The guidance also requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The measurement of expected credit losses is based on relevant information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. An entity must use judgment in determining the relevant information and estimation methods that are appropriate in its circumstances. This amendment was effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Entities should apply the amendment by means of a cumulative-effect adjustment to retained earnings as of the beginning of the fiscal year of adoption. ASU 2018-19 was issued to clarify that receivables arising from operating leases are not within the scope of Subtopic 326-20. Instead, impairment of receivables arising from operating leases should be accounted for in accordance with Topic 842, Leases. ASU 2019-04 was issued and provides entities alternatives for measurement of accrued interest receivable, clarifies the steps entities should take when recording the transfer of loans or debt securities between measurement classifications or categories and clarifies that entities should include expected recoveries on financial assets. ASU 2019-05 was issued to provide entities that have certain instruments within the scope of Subtopic 320-20 with an option to irrevocably elect the fair value option in Subtopic 825-10. ASU 2020-02 was issued to further explain the measurement of current expected credit losses and the development, governance, and documentation of a systematic methodology. Early adoption was permitted. 1st Quarter 2020 The Corporation has adopted the Update using a modified retrospective approach. The Corporation has developed a CECL allowance model which calculates reserves over the life of the loan and is largely driven by portfolio characteristics, risk-grading, economic outlook, and key methodology assumptions. Those assumptions are based upon the existing probability of default and loss given default framework. At adoption, the Corporation utilized a single economic forecast over a 2-year reasonable and supportable forecast period. In the second year, the Corporation used straight-line reversion to historical losses. The Corporation recorded a $131 million adjustment to the ACL related to the adoption of this standard, which includes $61 thousand related to the held to maturity investment securities portfolio. The Corporation has elected to maintain pools accounted for under Subtopic 310-30 at adoption. The Corporation has elected to utilize the 2019 Capital Transition Relief for initial adoption, as well as the 2020 Capital Transition Relief as permitted under applicable regulations. The total impact at adoption equates to an approximately 29 bp net, after tax, reduction in the tangible common equity ratio. Results for the periods after January 1, 2020 are presented in accordance with ASC 326 while prior period amounts continue to be reported in accordance with previously applicable standards. Standard Description Date of adoption Effect on financial statements ASU 2018-13 Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement The FASB issued an amendment to add, modify, and remove disclosure requirements on fair value measurements in Topic 820, Fair Value Measurement, based on the FASB Concepts Statement "Conceptual Framework for Financial Reporting," including the consideration of costs and benefits. The amendment is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. The amendments on changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements, and the narrative description of measurement uncertainty should be applied prospectively for only the most recent interim or annual period presented in the initial fiscal year of adoption. All other amendments should be applied retrospectively to all periods presented upon their effective date. Early adoption was permitted. 1st Quarter 2020 The Corporation has evaluated and determined it has an immaterial impact with minor changes in presentation. ASU 2017-04 Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment The FASB issued an amendment to simplify the subsequent quantitative measurement of goodwill by eliminating step two from the goodwill impairment test. Instead, an entity will perform only step one of its quantitative goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount, and then recognizing an impairment charge for the amount by which the carrying amount exceeds the reporting unit's fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. An entity will still have the option to perform a qualitative assessment for a reporting unit to determine if the quantitative step one impairment test is necessary. This amendment is effective for annual or interim goodwill impairment tests in fiscal years beginning after December 15, 2019. Entities should apply the amendment prospectively. Early adoption is permitted, including in an interim period, for impairment tests performed after January 1, 2017. 1st Quarter 2020 There has been no material impact on results of operations, financial position, and liquidity. The Corporation does its annual impairment testing in May. ASU 2020-03 Codification Improvements to Financial Instruments The FASB issued an amendment to further clarify that all entities are required to provide the fair value option disclosures in paragraphs 825-10-50-24 through 50-32. The amendment also states that paragraphs 820-10-35-2A(g) and 820-10-35-18L are to include the phrase nonfinancial items accounted for as derivatives under Topic 815 to be consistent with the previous amendments to Section 820-10-35 that were made by ASU No. 2018-09, Codification Improvements. The amendment also clarifies that the disclosure requirements in Topic 320 apply to the disclosure requirements in Topic 942 for depository and lending institutions along with improving the understandability of the guidance relating to subtopic 470-50 and subtopic 820-10. Lastly, the amendment clarifies that the contractual term of a net investment in a lease determined in accordance with Topic 842 should be the contractual term used to measure expected credit losses under Topic 326 and that when an entity regains control of financial assets sold, an ACL should be recorded in accordance with Topic 326. 1st Quarter 2020 The Corporation has evaluated and determined it has an immaterial impact. ASU 2020-04 Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting The FASB issued an amendment to provide optional expedients and exceptions for applying GAAP to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. The amendment only applies to contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. The expedients and exceptions provided by the amendments do not apply to contract modifications made and hedging relationships entered into or evaluated after December 31, 2022, except for hedging relationships existing as of December 31, 2022, that an entity has elected certain optional expedients for and that are retained through the end of the hedging relationship. 1st Quarter 2020 The Corporation has evaluated the impact of the Update and determined the expedients provided allow for simpler, more streamlined modifications to the financial instruments referencing LIBOR. A small population of loans have been modified under the new standard. Future Accounting Pronouncements The expected impact of accounting pronouncements recently issued or proposed but not yet required to be adopted are displayed in the table below: Standard Description Date of anticipated adoption Effect on financial statements ASU 2018-14 The FASB issued an amendment to modify the disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. The amendments also added requirements to disclose the weighted-average interest crediting rates for cash balance plans and other plans with promised interest crediting rates and an explanation of the reasons for significant gains and losses related to changes in the benefit obligation for the period. The amendment also clarifies the disclosure requirements in paragraph 715-20-50-3, which states that certain information for defined benefit pension plans should be disclosed. The amendments in this Update remove disclosures that no longer are considered cost beneficial, clarify the specific requirements of disclosures, and add disclosure requirements identified as relevant. The amendment is effective for fiscal years ending after December 15, 2020. Entities should apply the amendments in this Update on a retrospective basis to all periods presented. Early adoption is permitted. 1st Quarter 2021 The Corporation is currently evaluating the impact on its results of operations, financial position, and liquidity. ASU 2020-01 Investments-Equity Securities (Topic 321), Investments-Equity Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815) The FASB issued an amendment to clarify the interaction of the accounting for equity securities under Topic 321 and investments accounted for under the equity method of accounting in Topic 323 and the accounting for certain forward contracts and purchased options accounted for under Topic 815. The amendments clarify that an entity should consider observable transactions that require it to either apply or discontinue the equity method of accounting for the purposes of applying the measurement alternative in accordance with Topic 321 immediately before applying or upon discontinuing the equity method. The amendments also clarify that for the purpose of applying paragraph 815-10-15-141(a) an entity should not consider whether, upon the settlement of the forward contract or exercise of the purchased option, individually or with existing investments, the underlying securities would be accounted for under the equity method in Topic 323 or the fair value option in accordance with the financial instruments guidance in Topic 825. An entity also would evaluate the remaining characteristics in paragraph 815-010-15-141 to determine the accounting for those forward contracts and purchased options. 1st Quarter 2021 The Corporation is currently evaluating the impact on its results of operations, financial position, and liquidity.

Acquisitions Acquisitions (Tabl

Acquisitions Acquisitions (Tables)	Feb. 14, 2020	Jun. 14, 2019
Business Combinations [Abstract]
Schedule of Business Acquisitions, by Acquisition	The following table presents the estimated fair values of the assets acquired and liabilities assumed as of the acquisition date related to the First Staunton acquisition: ($ in Thousands) Purchase Accounting Adjustments February 14, 2020 Assets Cash and cash equivalents $ — $ 44,848 Investment securities available for sale (24) 98,743 Federal Home Loan Bank and Federal Reserve Bank stocks, at cost — 781 Loans (4,808) 369,684 Premises and equipment, net (3,005) 4,865 Bank owned life insurance 9 6,770 Goodwill 15,158 Core deposit intangibles (included in other intangible assets, net on the face of the consolidated balance sheets) 7,379 7,379 OREO (included in other assets on the face of the consolidated balance sheets) 670 762 Other assets 2,486 7,293 Total assets $ 556,285 Liabilities Deposits $ 1,285 $ 438,684 Other borrowings 61 34,613 Accrued expenses and other liabilities 179 6,688 Total liabilities $ 479,985 Total consideration paid $ 76,300	The following table presents the estimated fair values of the assets acquired and liabilities assumed as of the acquisition date related to Huntington branch acquisition: ($ in Thousands) Purchase Accounting Adjustments June 14, 2019 Assets Cash and cash equivalents $ — $ 551,250 Loans (1,552) 116,346 Premises and equipment, net 4,800 22,430 Goodwill 7,286 Core deposit intangibles (included in other intangible assets, net on the face of the consolidated balance sheets) 22,630 22,630 OREO (included in other assets on the face of the consolidated balance sheets) (2,561) 5,263 Other assets — 559 Total assets $ 725,764 Liabilities Deposits $ 156 $ 725,173 Other liabilities 70 590 Total liabilities $ 725,764
Financing Receivable, Purchased With Credit Deterioration	The carrying amount of those loans is as follows: ($ in Thousands) February 14, 2020 Purchase price of loans at acquisition $ 77,221 Allowance for credit losses at acquisition 3,504 Non-credit discount/(premium) at acquisition (951) Par value of acquired loans at acquisition $ 79,774

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2020
Accounting Policies [Abstract]
Schedule of New Accounting Pronouncements and Changes in Accounting Principles	The following table illustrates the adoption impact: December 31, 2019 January 1, 2020 ($ in Thousands) Allowance for Loan Losses Allowance for Unfunded Commitments CECL Day 1 Adjustment ACLL Beginning Balance Commercial and industrial $ 91,133 $ 12,276 $ 48,921 $ 152,330 Commercial real estate - owner occupied 10,284 127 (1,851) 8,560 Commercial and business lending 101,417 12,403 47,070 160,890 Commercial real estate - investor 40,514 530 2,287 43,331 Real estate construction 24,915 7,532 25,814 58,261 Commercial real estate lending 65,428 8,062 28,101 101,591 Total Commercial 166,846 20,465 75,171 262,482 Residential mortgage 16,960 — 33,215 50,175 Home equity 10,926 1,038 14,240 26,204 Other consumer 6,639 405 8,520 15,564 Total consumer 34,525 1,443 55,975 91,943 Total loans $ 201,371 $ 21,907 $ 131,147 $ 354,425

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	3 Months Ended
	Mar. 31, 2020
Earnings Per Share [Abstract]
Calculations for basic and diluted earnings per common share	Presented below are the calculations for basic and diluted earnings per common share: Three Months Ended March 31, (In Thousands, except per share data) 2020 2019 Net income $ 45,838 $ 86,686 Preferred stock dividends (3,801) (3,801) Net income available to common equity 42,037 82,885 Common shareholder dividends (28,264) (28,080) Unvested share-based payment awards (128) (103) Undistributed earnings $ 13,645 $ 54,702 Undistributed earnings allocated to common shareholders $ 13,555 $ 54,410 Undistributed earnings allocated to unvested share-based payment awards 90 292 Undistributed earnings $ 13,645 $ 54,702 Basic Distributed earnings to common shareholders $ 28,264 $ 28,080 Undistributed earnings allocated to common shareholders 13,555 54,410 Total common shareholders earnings, basic $ 41,819 $ 82,490 Diluted Distributed earnings to common shareholders $ 28,264 $ 28,080 Undistributed earnings allocated to common shareholders 13,555 54,410 Total common shareholders earnings, diluted $ 41,819 $ 82,490 Weighted average common shares outstanding 154,701 163,928 Effect of dilutive common stock awards 918 1,505 Diluted weighted average common shares outstanding 155,619 165,433 Basic earnings per common share $ 0.27 $ 0.50 Diluted earnings per common share $ 0.27 $ 0.50

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2020
Retirement Benefits [Abstract]
Fair value assumptions of stock options	The following assumptions were used in estimating the fair value for options granted in the first three months of 2020 and full year 2019: 2020 2019 Dividend yield 3.50 % 3.30 % Risk-free interest rate 1.60 % 2.60 % Weighted average expected volatility 21.00 % 24.00 % Weighted average expected life 5.75 years 5.75 years Weighted average per share fair value of options $2.39 $4.00
Summary of company's stock option activities	A summary of the Corporation’s stock option activity for the three months ended March 31, 2020 is presented below: Stock Options Shares (a) Weighted Average Weighted Average Remaining Contractual Term Aggregate Intrinsic Value (a) Outstanding at December 31, 2019 5,543 $ 20.13 6.25 years $ 16,043 Granted 1,697 18.43 Exercised (102) 13.98 Forfeited or expired (159) 22.52 Outstanding at March 31, 2020 6,978 $ 19.75 6.96 years $ 19 Options Exercisable at March 31, 2020 4,090 $ 19.15 5.37 years $ 19 (a) In thousands
Summary of restricted stock awards activity (excluding salary shares)	The following table summarizes information about the Corporation’s restricted stock awards activity for the three months ended March 31, 2020: Restricted Stock Awards Shares (a) Weighted Average Outstanding at December 31, 2019 2,393 $ 22.39 Granted 1,018 18.54 Vested (752) 23.33 Forfeited (61) 23.12 Outstanding at March 31, 2020 2,598 $ 20.59 (a) In thousands

Investment Securities (Tables)

Investment Securities (Tables)	3 Months Ended
	Mar. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Investment securities available for sale	The amortized cost and fair values of securities available for sale and held to maturity at March 31, 2020 were as follows: ($ in Thousands) Amortized Gross Gross Fair Value Investment securities available for sale U.S. government SBA agency securities $ 10,241 $ 2 $ (5) $ 10,238 Obligations of state and political subdivisions (municipal securities) 492,195 16,443 (1) 508,636 Residential mortgage-related securities FNMA / FHLMC 103,576 908 — 104,485 GNMA 799,983 23,804 — 823,787 Commercial mortgage-related securities FNMA / FHLMC 19,861 2,912 — 22,773 GNMA 1,108,336 10,162 (4,055) 1,114,443 FFELP asset backed securities 360,658 — (19,234) 341,424 Other debt securities 3,000 — — 3,000 Total investment securities available for sale $ 2,897,851 $ 54,231 $ (23,295) $ 2,928,787 Investment securities held to maturity U. S. Treasury securities $ 999 $ 42 $ — $ 1,041 Obligations of state and political subdivisions (municipal securities) 1,426,543 82,382 (475) 1,508,451 Residential mortgage-related securities FNMA / FHLMC 78,125 3,486 — 81,610 GNMA 245,675 8,124 — 253,799 GNMA commercial mortgage-related securities 398,092 6,500 (1,939) 402,653 Total investment securities held to maturity $ 2,149,434 $ 100,534 $ (2,414) $ 2,247,553 The amortized cost and fair values of securities available for sale and held to maturity at December 31, 2019 were as follows: ($ in Thousands) Amortized Gross Gross Fair Value Investment securities available for sale Obligations of state and political subdivisions (municipal securities) $ 529,908 $ 16,269 $ (18) $ 546,160 Residential mortgage-related securities FNMA / FHLMC 131,158 1,562 (59) 132,660 GNMA 982,941 3,887 (1,689) 985,139 Commercial mortgage-related securities FNMA / FHLMC 19,929 1,799 — 21,728 GNMA 1,314,836 7,403 (12,032) 1,310,207 FFELP asset backed securities 270,178 — (6,485) 263,693 Other debt securities 3,000 — — 3,000 Total investment securities available for sale $ 3,251,950 $ 30,920 $ (20,284) $ 3,262,586 Investment securities held to maturity U. S. Treasury securities $ 999 $ 19 $ — $ 1,018 Obligations of state and political subdivisions (municipal securities) 1,418,569 69,775 (1,118) 1,487,227 Residential mortgage-related securities FNMA / FHLMC 81,676 1,759 (15) 83,420 GNMA 269,523 1,882 (1,108) 270,296 GNMA commercial mortgage-related securities 434,317 6,308 (6,122) 434,503 Total investment securities held to maturity $ 2,205,083 $ 79,744 $ (8,363) $ 2,276,465
Investment securities held to maturity	The amortized cost and fair values of securities available for sale and held to maturity at March 31, 2020 were as follows: ($ in Thousands) Amortized Gross Gross Fair Value Investment securities available for sale U.S. government SBA agency securities $ 10,241 $ 2 $ (5) $ 10,238 Obligations of state and political subdivisions (municipal securities) 492,195 16,443 (1) 508,636 Residential mortgage-related securities FNMA / FHLMC 103,576 908 — 104,485 GNMA 799,983 23,804 — 823,787 Commercial mortgage-related securities FNMA / FHLMC 19,861 2,912 — 22,773 GNMA 1,108,336 10,162 (4,055) 1,114,443 FFELP asset backed securities 360,658 — (19,234) 341,424 Other debt securities 3,000 — — 3,000 Total investment securities available for sale $ 2,897,851 $ 54,231 $ (23,295) $ 2,928,787 Investment securities held to maturity U. S. Treasury securities $ 999 $ 42 $ — $ 1,041 Obligations of state and political subdivisions (municipal securities) 1,426,543 82,382 (475) 1,508,451 Residential mortgage-related securities FNMA / FHLMC 78,125 3,486 — 81,610 GNMA 245,675 8,124 — 253,799 GNMA commercial mortgage-related securities 398,092 6,500 (1,939) 402,653 Total investment securities held to maturity $ 2,149,434 $ 100,534 $ (2,414) $ 2,247,553 The amortized cost and fair values of securities available for sale and held to maturity at December 31, 2019 were as follows: ($ in Thousands) Amortized Gross Gross Fair Value Investment securities available for sale Obligations of state and political subdivisions (municipal securities) $ 529,908 $ 16,269 $ (18) $ 546,160 Residential mortgage-related securities FNMA / FHLMC 131,158 1,562 (59) 132,660 GNMA 982,941 3,887 (1,689) 985,139 Commercial mortgage-related securities FNMA / FHLMC 19,929 1,799 — 21,728 GNMA 1,314,836 7,403 (12,032) 1,310,207 FFELP asset backed securities 270,178 — (6,485) 263,693 Other debt securities 3,000 — — 3,000 Total investment securities available for sale $ 3,251,950 $ 30,920 $ (20,284) $ 3,262,586 Investment securities held to maturity U. S. Treasury securities $ 999 $ 19 $ — $ 1,018 Obligations of state and political subdivisions (municipal securities) 1,418,569 69,775 (1,118) 1,487,227 Residential mortgage-related securities FNMA / FHLMC 81,676 1,759 (15) 83,420 GNMA 269,523 1,882 (1,108) 270,296 GNMA commercial mortgage-related securities 434,317 6,308 (6,122) 434,503 Total investment securities held to maturity $ 2,205,083 $ 79,744 $ (8,363) $ 2,276,465
Amortized cost and fair values of investment securities by contractual maturity	The expected maturities of investment securities available for sale and held to maturity at March 31, 2020 are shown below: Available for Sale Held to Maturity ($ in Thousands) Amortized Fair Amortized Fair Due in one year or less $ 10,731 $ 10,738 $ 32,555 $ 32,703 Due after one year through five years 30,829 31,242 77,586 78,683 Due after five years through ten years 324,501 334,499 153,519 158,843 Due after ten years 129,134 135,157 1,163,883 1,239,262 Total debt securities 495,195 511,636 1,427,542 1,509,492 U.S. government SBA agency securities 10,241 10,238 — — Residential mortgage-related securities FNMA / FHLMC 103,576 104,485 78,125 81,610 GNMA 799,983 823,787 245,675 253,799 Commercial mortgage-related securities FNMA / FHLMC 19,861 22,773 — — GNMA 1,108,336 1,114,443 398,092 402,653 FFELP asset backed securities 360,658 341,424 — — Total investment securities $ 2,897,851 $ 2,928,787 $ 2,149,434 $ 2,247,553 Ratio of fair value to amortized cost 101.1 % 104.6 %
Debt Securities, Held-to-maturity, Credit Quality Indicator	The following table summarizes the credit quality indicator of held to maturity securities at amortized cost at March 31, 2020: ($ in Thousands) AAA AA A Total U. S. Treasury securities $ 999 $ — $ — $ 999 Obligations of state and political subdivisions (municipal securities) 543,620 862,040 20,883 1,426,543 Residential mortgage-related securities FNMA/FHLMC 78,125 — — 78,125 GNMA 245,675 — — 245,675 GNMA commercial mortgage-related securities 398,092 — — 398,092 Total held to maturity securities $ 1,266,510 $ 862,040 $ 20,883 $ 2,149,434
Realized gains and losses and proceeds from sale	The proceeds from the sale of investment securities for the three months ended March 31, 2020 and 2019 are shown below: Three Months Ended March 31, ($ in Thousands) 2020 2019 Gross gains on available for sale securities $ 6,198 $ 1,680 Gross gains on held to maturity securities — — Total gains 6,198 1,680 Gross (losses) on available for sale securities (80) — Gross (losses) on held to maturity securities — — Total (losses) (80) — Investment securities gains (losses), net $ 6,118 $ 1,680 Proceeds from sales of investment securities $ 365,239 $ 131,122
Unrealized losses and fair value of available for sale and held to maturity securities, by investment category and time length	The following represents gross unrealized losses and the related fair value of investment securities available for sale and held to maturity, aggregated by investment category and length of time individual securities have been in a continuous unrealized loss position, at March 31, 2020: Less than 12 months 12 months or more Total ($ in Thousands) Number Unrealized Fair Number Unrealized Fair Unrealized Fair Investment securities available for sale U.S. government SBA agency securities 7 $ (5) $ 4,958 — $ — $ — $ (5) $ 4,958 Obligations of state and political subdivisions (municipal securities) 5 (1) 1,313 — — — (1) 1,313 GNMA commercial mortgage-related securities 22 (1,111) 259,273 8 (2,944) 138,611 (4,055) 397,883 FFELP asset backed securities 16 (10,971) 222,197 10 (8,262) 119,228 (19,234) 341,424 Other debt securities 2 — 2,000 — — — — 2,000 Total 52 $ (12,089) $ 489,740 18 $ (11,206) $ 257,838 $ (23,295) $ 747,578 Investment securities held to maturity Obligations of state and political subdivisions (municipal securities) 22 $ (470) $ 28,779 3 $ (5) $ 542 $ (475) $ 29,321 Residential mortgage-related securities FNMA / FHLMC 1 — — — — — — — GNMA commercial mortgage-related securities 8 (332) 126,170 7 (1,607) 126,624 (1,939) 252,794 Total 31 $ (802) $ 154,950 10 $ (1,612) $ 127,166 $ (2,414) $ 282,116 For comparative purposes, the following represents gross unrealized losses and the related fair value of investment securities available for sale and held to maturity, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at December 31, 2019: Less than 12 months 12 months or more Total ($ in Thousands) Number Unrealized Fair Number Unrealized Fair Unrealized Fair Investment securities available for sale Obligations of state and political subdivisions (municipal securities) 4 $ (18) $ 1,225 — $ — $ — $ (18) $ 1,225 Residential mortgage-related securities FNMA / FHLMC — — — 4 (59) 34,807 (59) 34,807 GNMA 18 (924) 322,394 3 (766) 79,461 (1,689) 401,856 GNMA commercial mortgage-related securities 22 (810) 258,218 42 (11,222) 621,307 (12,032) 879,524 FFELP asset backed securities 19 (6,092) 250,780 2 (393) 12,913 (6,485) 263,693 Other debt securities 2 — 2,000 — — — — 2,000 Total 65 $ (7,843) $ 834,616 51 $ (12,440) $ 748,487 $ (20,284) $ 1,583,104 Investment securities held to maturity Obligations of state and political subdivisions (municipal securities) 52 $ (1,105) $ 77,562 6 $ (13) $ 2,378 $ (1,118) $ 79,940 Residential mortgage-related securities FNMA / FHLMC 1 (6) 1,242 1 (9) 833 (15) 2,075 GNMA 12 (1,059) 187,261 8 (49) 6,587 (1,108) 193,849 GNMA commercial mortgage-related securities 2 (29) 26,202 21 (6,093) 357,733 (6,122) 383,935 Total 67 $ (2,199) $ 292,267 36 $ (6,164) $ 367,532 $ (8,363) $ 659,799

Loans Loans (Tables)

Loans Loans (Tables)	3 Months Ended
	Mar. 31, 2020
Receivables [Abstract]
Loan composition	The period end loan composition was as follows: ($ in Thousands) March 31, 2020 December 31, 2019 Commercial and industrial $ 8,517,974 $ 7,354,594 Commercial real estate — owner occupied 940,687 911,265 Commercial and business lending 9,458,661 8,265,858 Commercial real estate — investor 4,038,036 3,794,517 Real estate construction 1,544,858 1,420,900 Commercial real estate lending 5,582,894 5,215,417 Total commercial 15,041,555 13,481,275 Residential mortgage 8,132,417 8,136,980 Home equity 844,901 852,025 Other consumer 346,761 351,159 Total consumer 9,324,079 9,340,164 Total loans (a) $ 24,365,633 $ 22,821,440 (a) During the first quarter of 2020, the Corporation transferred $200 million of portfolio residential mortgages to residential loans held for sale, which are not included in total loans.
Commercial and consumer loans by credit quality indicator	The following table presents commercial and consumer loans by credit quality indicator by vintage year at March 31, 2020: Term Loans Amortized Cost Basis by Origination Year (a) ($ in Thousands) Rev Loans Converted to Term (a) Rev Loans Amortized Cost Basis YTD 2020 2019 2018 2017 2016 Prior Total Commercial and industrial: Risk rating: Pass $ 777 $ 2,027,795 $ 665,843 $ 1,943,817 $ 1,770,838 $ 846,057 $ 392,996 $ 598,104 $ 8,245,450 Special Mention — 26,674 5,570 17,726 5,255 1,260 7,287 151 63,922 Potential Problem (b) 685 60,784 134 2,430 21,030 53,915 9,053 2,401 149,747 Nonaccrual (c) — — 231 7,200 550 16,171 17,532 17,171 58,854 Commercial and industrial $ 1,462 $ 2,115,253 $ 671,779 $ 1,971,173 $ 1,797,672 $ 917,402 $ 426,869 $ 617,827 $ 8,517,974 Commercial real estate - owner occupied: Risk rating: Pass $ — $ 45,423 $ 33,107 $ 220,821 $ 141,652 $ 133,631 $ 160,435 $ 150,188 $ 885,257 Special Mention — 86 — 16,438 15,143 139 662 5,321 37,789 Potential Problem — 230 100 780 1,173 1,463 9,930 2,126 15,802 Nonaccrual — — — — 88 343 — 1,407 1,838 Commercial real estate - owner occupied $ — $ 45,739 $ 33,207 $ 238,039 $ 158,056 $ 135,576 $ 171,026 $ 159,043 $ 940,687 Commercial and business lending: Risk rating: Pass $ 777 $ 2,073,218 $ 698,951 $ 2,164,638 $ 1,912,490 $ 979,688 $ 553,431 $ 748,292 $ 9,130,708 Special Mention — 26,760 5,570 34,163 20,398 1,399 7,949 5,472 101,711 Potential Problem (b) 685 61,014 234 3,211 22,204 55,378 18,983 4,527 165,550 Nonaccrual (c) — — 231 7,200 637 16,514 17,532 18,578 60,692 Commercial and business lending $ 1,462 $ 2,160,992 $ 704,986 $ 2,209,212 $ 1,955,729 $ 1,052,978 $ 597,895 $ 776,869 $ 9,458,661 Commercial real estate - investor: Risk rating: Pass $ — $ 206,640 $ 499,631 $ 1,253,538 $ 820,547 $ 348,738 $ 405,718 $ 344,191 $ 3,879,003 Special Mention — — — 33,440 15,128 15,239 31,581 1,525 96,913 Potential Problem — 1,157 20 30,714 3,329 283 12,792 12,734 61,030 Nonaccrual — 446 570 — — — — 75 1,091 Commercial real estate - investor $ — $ 208,244 $ 500,221 $ 1,317,691 $ 839,004 $ 364,261 $ 450,091 $ 358,524 $ 4,038,036 Real estate construction: Risk rating: Pass $ — $ 80,118 $ 121,768 $ 708,726 $ 438,100 $ 146,967 $ 3,331 $ 25,389 $ 1,524,400 Special Mention — — — — 18,203 — — 16 18,219 Potential Problem — — — 148 — 1,557 — 48 1,753 Nonaccrual — — — — — — — 486 486 Real estate construction $ — $ 80,118 $ 121,768 $ 708,875 $ 456,303 $ 148,523 $ 3,331 $ 25,939 $ 1,544,858 Commercial real estate lending: Risk rating: Pass $ — $ 286,759 $ 621,399 $ 1,962,264 $ 1,258,647 $ 495,705 $ 409,049 $ 369,580 $ 5,403,403 Special Mention — — — 33,440 33,331 15,239 31,581 1,540 115,132 Potential Problem — 1,157 20 30,862 3,329 1,840 12,792 12,782 62,783 Nonaccrual — 446 570 — — — — 560 1,577 Commercial real estate lending $ — $ 288,362 $ 621,990 $ 2,026,565 $ 1,295,307 $ 512,784 $ 453,422 $ 384,463 $ 5,582,894 Total commercial: Risk rating: Pass $ 777 $ 2,359,976 $ 1,320,350 $ 4,126,902 $ 3,171,136 $ 1,475,393 $ 962,480 $ 1,117,872 $ 14,534,111 Special Mention — 26,760 5,570 67,603 53,729 16,638 39,530 7,013 216,843 Potential Problem 685 62,171 255 34,073 25,532 57,217 31,775 17,309 228,333 Nonaccrual — 446 801 7,200 637 16,514 17,532 19,138 62,269 Total commercial $ 1,462 $ 2,449,354 $ 1,326,976 $ 4,235,777 $ 3,251,035 $ 1,565,762 $ 1,051,317 $ 1,161,333 $ 15,041,555 Term Loans Amortized Cost Basis by Origination Year (a) ($ in Thousands) Rev Loans Converted to Term (a) Rev Loans Amortized Cost Basis YTD 2020 2019 2018 2017 2016 Prior Total Residential mortgage: Risk rating: Pass $ — $ 92 $ 352,107 $ 1,815,240 $ 874,080 $ 1,474,788 $ 1,321,163 $ 2,226,104 $ 8,063,574 Special Mention — — — — 37 22 36 572 667 Potential Problem — — — 587 36 992 432 1,274 3,322 Nonaccrual — — 619 3,802 5,422 8,949 12,678 33,385 64,855 Residential mortgage $ — $ 92 $ 352,726 $ 1,819,630 $ 879,575 $ 1,484,752 $ 1,334,308 $ 2,261,335 $ 8,132,417 Home equity: Risk rating: Pass $ 6,286 $ 738,938 $ 223 $ 1,626 $ 1,869 $ 2,374 $ 2,748 $ 83,567 $ 831,344 Special Mention 102 1,262 65 39 91 50 97 338 1,942 Potential Problem — 2,045 — — 46 — — 146 2,238 Nonaccrual 221 916 128 224 284 383 180 7,263 9,378 Home equity $ 6,609 $ 743,161 $ 417 $ 1,888 $ 2,290 $ 2,807 $ 3,025 $ 91,314 $ 844,901 Other consumer: Risk rating: Pass $ 62 $ 184,495 $ 2,874 $ 16,037 $ 6,843 $ 3,213 $ 2,369 $ 130,073 $ 345,904 Special Mention 4 559 — 1 — — 78 4 642 Potential Problem — — — — — — — — — Nonaccrual 8 119 — 34 — 10 — 52 215 Other consumer $ 75 $ 185,173 $ 2,874 $ 16,072 $ 6,843 $ 3,223 $ 2,447 $ 130,129 $ 346,761 Total consumer: Risk rating: Pass $ 6,348 $ 923,525 $ 355,204 $ 1,832,904 $ 882,791 $ 1,480,375 $ 1,326,279 $ 2,439,744 $ 9,240,821 Special Mention 106 1,821 65 40 128 71 212 914 3,251 Potential Problem — 2,045 — 587 83 992 432 1,420 5,559 Nonaccrual 229 1,036 748 4,060 5,706 9,342 12,857 40,700 74,448 Total consumer $ 6,683 $ 928,426 $ 356,017 $ 1,837,590 $ 888,708 $ 1,490,781 $ 1,339,780 $ 2,482,777 $ 9,324,079 Total loans: Risk rating: Pass $ 7,125 $ 3,283,501 $ 1,675,554 $ 5,959,806 $ 4,053,928 $ 2,955,768 $ 2,288,760 $ 3,557,616 $ 23,774,932 Special Mention 106 28,581 5,635 67,642 53,857 16,710 39,741 7,927 220,093 Potential Problem 685 64,216 255 34,660 25,615 58,210 32,207 18,729 233,892 Nonaccrual 229 1,482 1,549 11,260 6,343 25,856 30,390 59,838 136,717 Total loans $ 8,145 $ 3,377,780 $ 1,682,992 $ 6,073,368 $ 4,139,743 $ 3,056,543 $ 2,391,098 $ 3,644,110 $ 24,365,633 (a) Revolving loans converted to term loans are also reported in their year of origination (b) Includes $67 million of oil and gas related loans (c) Includes $29 million of oil and gas related loans The following table presents commercial and consumer loans by credit quality indicator at December 31, 2019 : ($ in Thousands) Pass Special Mention Potential Problem Nonaccrual Total Commercial and industrial $ 7,118,448 $ 79,525 $ 110,308 $ 46,312 $ 7,354,594 Commercial real estate - owner occupied 866,193 25,115 19,889 67 911,265 Commercial and business lending 7,984,641 104,641 130,197 46,380 8,265,858 Commercial real estate - investor 3,620,785 139,873 29,449 4,409 3,794,517 Real estate construction 1,420,374 33 — 493 1,420,900 Commercial real estate lending 5,041,159 139,906 29,449 4,902 5,215,417 Total commercial 13,025,800 244,547 159,646 51,282 13,481,275 Residential mortgage 8,077,122 563 1,451 57,844 8,136,980 Home equity 841,757 1,164 — 9,104 852,025 Other consumer 350,260 748 — 152 351,159 Total consumer 9,269,139 2,475 1,451 67,099 9,340,164 Total loans $ 22,294,939 $ 247,022 $ 161,097 $ 118,380 $ 22,821,440
Summarized details of Loans	The following table presents loans by past due status at March 31, 2020: Accruing ($ in Thousands) Current 30-59 Days 60-89 Days 90 Days or Nonaccrual (a)(b) Total Commercial and industrial $ 8,457,708 $ 508 $ 468 $ 436 $ 58,854 $ 8,517,974 Commercial real estate - owner occupied 938,798 51 — — 1,838 940,687 Commercial and business lending 9,396,506 558 468 436 60,692 9,458,661 Commercial real estate - investor 4,022,482 14,462 — — 1,091 4,038,036 Real estate construction 1,544,194 179 — — 486 1,544,858 Commercial real estate lending 5,566,676 14,641 — — 1,577 5,582,894 Total commercial 14,963,182 15,200 468 436 62,269 15,041,555 Residential mortgage 8,057,461 9,492 610 — 64,855 8,132,417 Home equity 828,523 6,012 988 — 9,378 844,901 Other consumer 342,950 1,028 749 1,819 215 346,761 Total consumer 9,228,933 16,531 2,348 1,819 74,448 9,324,079 Total loans $ 24,192,115 $ 31,731 $ 2,816 $ 2,255 $ 136,717 $ 24,365,633 (a) Of the total nonaccrual loans, $75 million, or 55%, were current with respect to payment at March 31, 2020. (b) No interest income was recognized on nonaccrual loans during the three months ended March 31, 2020. In addition, there were $44 million of nonaccrual loans for which there was no related ACLL for the three months ended March 31, 2020. The following table presents loans by past due status at December 31, 2019: Accruing ($ in Thousands) Current 30-59 Days 60-89 Days 90 Days or Nonaccrual (a) Total Commercial and industrial $ 7,307,118 $ 576 $ 245 $ 342 $ 46,312 $ 7,354,594 Commercial real estate - owner occupied 909,828 1,369 — — 67 911,265 Commercial and business lending 8,216,947 1,945 245 342 46,380 8,265,858 Commercial real estate - investor 3,788,296 1,812 — — 4,409 3,794,517 Real estate construction 1,420,310 64 33 — 493 1,420,900 Commercial real estate lending 5,208,606 1,876 33 — 4,902 5,215,417 Total commercial 13,425,552 3,821 278 342 51,282 13,481,275 Residential mortgage 8,069,863 8,749 525 — 57,844 8,136,980 Home equity 837,274 4,483 1,164 — 9,104 852,025 Other consumer 347,007 1,135 949 1,917 152 351,159 Total consumer 9,254,144 14,366 2,638 1,917 67,099 9,340,164 Total loans $ 22,679,696 $ 18,188 $ 2,916 $ 2,259 $ 118,380 $ 22,821,440 (a) Of the total nonaccrual loans, $48 million, or 41%, were current with respect to payment at December 31, 2019.
Summarized details of impaired Loans	The following table presents impaired loans individually evaluated under ASC Topic 310, excluding $2 million of purchased credit-impaired loans, at December 31, 2019 : ($ in Thousands) Recorded Unpaid Related Average Interest Loans with a related allowance Commercial and industrial $ 47,249 $ 63,346 $ 12,010 $ 45,290 $ 1,832 Commercial real estate — owner occupied 1,676 1,682 19 1,774 88 Commercial and business lending 48,924 65,028 12,029 47,064 1,919 Commercial real estate — investor 928 2,104 15 950 15 Real estate construction 477 559 67 494 30 Commercial real estate lending 1,405 2,663 82 1,445 45 Total commercial 50,329 67,691 12,111 48,509 1,965 Residential mortgage 21,450 22,625 2,740 23,721 856 Home equity 3,076 3,468 1,190 3,756 191 Other consumer 1,247 1,249 125 1,250 1 Total consumer 25,773 27,342 4,055 28,726 1,047 Total loans with a related allowance $ 76,102 $ 95,033 $ 16,165 $ 77,235 $ 3,012 Loans with no related allowance Commercial and industrial $ 14,787 $ 33,438 $ — $ 20,502 $ 63 Commercial real estate — owner occupied — — — — — Commercial and business lending 14,787 33,438 — 20,502 63 Commercial real estate — investor 3,705 3,705 — 3,980 159 Real estate construction — — — — — Commercial real estate lending 3,705 3,705 — 3,980 159 Total commercial 18,491 37,142 — 24,482 222 Residential mortgage 14,104 14,461 — 10,962 373 Home equity 1,346 1,383 — 1,017 21 Other consumer — — — — — Total consumer 15,450 15,845 — 11,979 394 Total loans with no related allowance $ 33,941 $ 52,987 $ — $ 36,462 $ 616 Total Commercial and industrial $ 62,035 $ 96,784 $ 12,010 $ 65,792 $ 1,895 Commercial real estate — owner occupied 1,676 1,682 19 1,774 88 Commercial and business lending 63,711 98,466 12,029 67,566 1,982 Commercial real estate — investor 4,633 5,808 15 4,931 174 Real estate construction 477 559 67 494 30 Commercial real estate lending 5,110 6,367 82 5,425 204 Total commercial 68,820 104,833 12,111 72,991 2,186 Residential mortgage 35,554 37,087 2,740 34,683 1,229 Home equity 4,422 4,851 1,190 4,773 211 Other consumer 1,247 1,249 125 1,250 1 Total consumer 41,223 43,187 4,055 40,706 1,441 Total loans (a) $ 110,043 $ 148,020 $ 16,165 $ 113,697 $ 3,628
Nonaccrual and performing restructured loans	The following table presents nonaccrual and performing restructured loans by loan portfolio: March 31, 2020 December 31, 2019 ($ in Thousands) Performing Nonaccrual Restructured Loans (a) Performing Nonaccrual Restructured Loans (a) Commercial and industrial $ 16,056 $ 6,909 $ 16,678 $ 7,376 Commercial real estate — owner occupied 2,091 — 1,676 — Commercial real estate — investor 281 570 293 — Real estate construction 339 176 298 179 Residential mortgage 4,654 15,097 3,955 13,035 Home equity 1,719 1,451 1,896 1,904 Other consumer 1,245 1 1,246 1 Total restructured loans (b) $ 26,384 $ 24,204 $ 26,041 $ 22,494 (a) Nonaccrual restructured loans have been included within nonaccrual loans. (b) Does not include any restructured loans related to COVID-19 in accordance with regulatory guidance.
Summary of restructured loans	The following table provides the number of loans modified in a TDR by loan portfolio, the recorded investment and unpaid principal balance for the three months ended March 31, 2020 and 2019: Three Months Ended March 31, 2020 Three Months Ended March 31, 2019 ($ in Thousands) Number Recorded Investment (a) Unpaid Principal Balance (b) Number Recorded Investment (a) Unpaid Principal Balance (b) Commercial and industrial 1 $ 48 $ 48 — $ — $ — Commercial real estate — owner occupied 1 290 321 1 78 78 Commercial real estate — investor 1 570 1,740 — — — Real estate construction 1 122 122 — — — Residential mortgage 18 3,592 3,668 25 4,357 4,374 Home equity 8 277 277 13 293 312 Other consumer — — — 1 11 11 Total loans modified 30 $ 4,899 $ 6,175 40 $ 4,739 $ 4,776 (a) Represents post-modification outstanding recorded investment. (b) Represents pre-modification outstanding recorded investment.
Troubled debt restructurings subsequent redefault	The following table provides the number of loans modified in a TDR during the previous twelve months which subsequently defaulted during the three months ended March 31, 2020 and 2019 and the recorded investment in these restructured loans as of March 31, 2020 and 2019: Three Months Ended March 31, 2020 Three Months Ended March 31, 2019 ($ in Thousands) Number of Recorded Number of Recorded Residential mortgage 3 $ 388 5 $ 613 Home equity 2 88 7 177 Total loans modified 5 $ 476 12 $ 790
Changes in the allowance for loan losses by portfolio segment	The following table presents a summary of the changes in the ACLL by portfolio segment for the three months ended March 31, 2020: ($ in Thousands) Dec. 31, 2019 Cumulative effect of ASU 2016-13 adoption (CECL) Jan. 1, 2020 Charge offs Recoveries Net Charge offs Allowance for PCD loans for bank acquisition Provision recorded at acquisition Provision for loan losses March 31, 2020 ACLL / Loans Allowance for loan losses Commercial and industrial $ 91,133 $ 52,919 $ 144,052 $ (16,336) $ 1,288 $ (15,049) $ 293 $ 408 $ 44,284 $ 173,988 Commercial real estate — owner occupied 10,284 (1,851) 8,433 — — — 890 255 734 10,313 Commercial and business lending 101,417 51,068 152,485 (16,336) 1,288 (15,048) 1,183 663 45,018 184,301 Commercial real estate — investor 40,514 2,041 42,555 — — — 753 472 (1,664) 42,115 Real estate construction 24,915 7,467 32,382 (7) 19 11 435 492 (2,573) 30,746 Commercial real estate lending 65,428 9,508 74,937 (7) 19 11 1,188 964 (4,237) 72,861 Total commercial 166,846 60,576 227,422 (16,343) 1,307 (15,037) 2,371 1,627 40,781 257,162 Residential mortgage 16,960 33,215 50,175 (1,003) 91 (912) 651 403 (6,370) 43,947 Home equity 10,926 11,649 22,575 (526) 598 71 422 374 (1,135) 22,308 Other consumer 6,639 7,016 13,655 (1,434) 272 (1,162) 61 140 1,681 14,376 Total consumer 34,525 51,880 86,405 (2,963) 961 (2,003) 1,134 917 (5,824) 80,631 Total loans $ 201,371 $ 112,457 $ 313,828 $ (19,308) $ 2,268 $ (17,040) $ 3,504 $ 2,543 $ 34,957 $ 337,793 Allowance for unfunded commitments Commercial and industrial $ 12,276 $ (3,998) $ 8,278 $ — $ — $ — $ — $ 61 $ 6,461 $ 14,800 Commercial real estate — owner occupied 127 — 127 — — — — 4 109 240 Commercial and business lending 12,403 (3,998) 8,405 — — — — 65 6,570 15,040 Commercial real estate — investor 530 246 776 — — — — 2 (347) 431 Real estate construction 7,532 18,347 25,879 — — — — 45 9,018 34,942 Commercial real estate lending 8,062 18,593 26,655 — — — — 47 8,671 35,373 Total commercial 20,465 14,595 35,060 — — — — 112 15,241 50,413 Home equity 1,038 2,591 3,629 — — — — 66 241 3,936 Other consumer 405 1,504 1,909 — — — — — 17 1,926 Total consumer 1,443 4,095 5,538 — — — — 66 258 5,862 Total loans $ 21,907 $ 18,690 $ 40,597 $ — $ — $ — $ — $ 179 $ 15,500 $ 56,276 Allowance for credit losses on loans Commercial and industrial $ 103,409 $ 48,921 $ 152,330 $ (16,336) $ 1,288 $ (15,049) $ 293 $ 469 $ 50,745 $ 188,788 2.22 % Commercial real estate — owner occupied 10,411 (1,851) 8,560 — — — 890 259 843 10,553 1.12 % Commercial and business lending 113,820 47,070 160,890 (16,336) 1,288 (15,048) 1,183 728 51,588 199,342 2.11 % Commercial real estate — investor 41,044 2,287 43,331 — — — 753 474 (2,011) 42,546 1.05 % Real estate construction 32,447 25,814 58,261 (7) 19 11 435 537 6,445 65,688 4.25 % Commercial real estate lending 73,490 28,101 101,591 (7) 19 11 1,188 1,011 4,434 108,235 1.94 % Total commercial 187,311 75,171 262,482 (16,343) 1,307 (15,037) 2,371 1,739 56,022 307,577 2.04 % Residential mortgage 16,960 33,215 50,175 (1,003) 91 (912) 651 403 (6,370) 43,947 0.54 % Home equity 11,964 14,240 26,204 (526) 598 71 422 440 (894) 26,244 3.11 % Other consumer 7,044 8,520 15,564 (1,434) 272 (1,162) 61 140 1,698 16,302 4.70 % Total consumer 35,968 55,975 91,943 (2,963) 961 (2,003) 1,134 983 (5,566) 86,493 0.93 % Total loans $ 223,278 $ 131,147 $ 354,425 $ (19,308) $ 2,268 $ (17,040) $ 3,504 $ 2,722 $ 50,457 $ 394,069 1.62 % The following table presents details of the allowance for loan losses segregated by loan portfolio segment as of December 31, 2019, calculated in accordance with prior incurred loss methodology applicable under ASC Topic 310: ($ in Thousands) December 31, 2018 Charge offs Recoveries Net Charge offs Provision for loan losses December 31, 2019 Allowance for loan losses Commercial and industrial $ 108,835 $ (63,315) $ 11,875 $ (51,441) $ 33,738 $ 91,133 Commercial real estate — owner occupied 9,255 (222) 2,795 2,573 (1,543) 10,284 Commercial and business lending 118,090 (63,537) 14,670 (48,868) 32,195 101,417 Commercial real estate — investor 40,844 — 31 31 (361) 40,514 Real estate construction 28,240 (60) 302 243 (3,568) 24,915 Commercial real estate lending 69,084 (60) 333 274 (3,929) 65,429 Total commercial 187,174 (63,597) 15,003 (48,594) 28,266 166,846 Residential mortgage 25,595 (3,322) 692 (2,630) (6,005) 16,960 Home equity 19,266 (1,846) 2,599 753 (9,093) 10,926 Other consumer 5,988 (5,548) 868 (4,681) 5,332 6,639 Total consumer 50,849 (10,716) 4,159 (6,558) (9,766) 34,525 Total loans $ 238,023 $ (74,313) $ 19,161 $ (55,152) $ 18,500 $ 201,371 A summary of the individually and collectively evaluated loans by portfolio segment at December 31, 2019, was as follows: Allowance for loan losses Loans ($ in Thousands) Individually evaluated for impairment Collectively evaluated for impairment Total allowance for loan losses Individually evaluated for impairment Collectively evaluated for impairment Acquired and accounted for under ASC 310-30 (a) Total loans Commercial and industrial $ 12,010 $ 79,123 $ 91,133 $ 62,035 $ 7,292,217 $ 342 $ 7,354,594 Commercial real estate — owner occupied 19 10,265 10,284 1,676 909,010 579 911,265 Commercial and business lending 12,029 89,388 101,417 63,711 8,201,227 921 8,265,858 Commercial real estate — investor 15 40,498 40,514 4,633 3,789,755 129 3,794,517 Real estate construction 67 24,848 24,915 477 1,420,416 7 1,420,900 Commercial real estate lending 82 65,346 65,429 5,110 5,210,171 136 5,215,417 Total commercial 12,111 154,734 166,846 68,821 13,411,398 1,057 13,481,275 Residential mortgage 2,740 14,220 16,960 35,554 8,100,958 469 8,136,980 Home equity 1,190 9,737 10,926 4,422 847,577 26 852,025 Other consumer 125 6,514 6,639 1,247 349,912 — 351,159 Total consumer 4,055 30,471 34,525 41,223 9,298,447 495 9,340,164 Total loans $ 16,165 $ 185,205 $ 201,371 $ 110,043 $ 22,709,845 $ 1,552 $ 22,821,440 (a) Loans acquired in business combinations and accounted for under ASC Subtopic 310-30 "Receivables — Loans and Debt Securities Acquired with Deteriorated Credit Quality."
Changes in the allowance for unfunded commitments	The following table presents a summary of the changes in the allowance for unfunded commitments: ($ in Thousands) Three Months Ended March 31, 2020 Year Ended December 31, 2019 Allowance for Unfunded Commitments Balance at beginning of period $ 21,907 $ 24,336 Cumulative effect of ASU 2016-13 adoption (CECL) 18,690 N/A Balance at beginning of period, adjusted 40,597 24,336 Provision for unfunded commitments 15,500 (2,500) Amount recorded at acquisition 179 70 Balance at end of period $ 56,276 $ 21,907

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of core deposit intangibles and other intangibles	For CDIs and other intangibles, changes in the gross carrying amount, accumulated amortization, and net book value were as follows: ($ in Thousands) Three Months Ended March 31, 2020 Year Ended December 31, 2019 Core deposit intangibles Gross carrying amount at the beginning of the year $ 80,730 $ 58,100 Additions during the period 7,379 22,630 Accumulated amortization (14,597) (12,456) Net book value $ 73,512 $ 68,274 Amortization during the year $ 2,141 $ 7,130 Other intangibles Gross carrying amount at the beginning of the year $ 38,970 $ 44,887 Additions during the period 200 — Reductions due to sale (343) (217) Accumulated amortization (19,616) (24,643) Net book value $ 19,211 $ 20,027 Amortization during the year $ 673 $ 2,818
Summary of changes in balance of mortgage servicing rights asset and mortgage servicing rights valuation allowance	A summary of changes in the balance of the MSRs asset and the MSRs valuation allowance is as follows: ($ in Thousands) Three Months Ended March 31, 2020 Year Ended December 31, 2019 Mortgage servicing rights Mortgage servicing rights at beginning of period $ 67,607 $ 68,433 Additions from acquisition 1,357 — Additions 2,359 11,606 Amortization (3,635) (12,432) Mortgage servicing rights at end of period $ 67,688 $ 67,607 Valuation allowance at beginning of period $ (302) $ (239) (Additions) recoveries, net (9,098) (63) Valuation allowance at end of period $ (9,399) $ (302) Mortgage servicing rights, net $ 58,289 $ 67,306 Fair value of mortgage servicing rights $ 58,311 $ 72,532 Portfolio of residential mortgage loans serviced for others (“servicing portfolio”) $ 8,548,600 $ 8,488,969 Mortgage servicing rights, net to servicing portfolio 0.68 % 0.79 % Mortgage servicing rights expense (a) $ 12,733 $ 12,494
Summary of estimated future amortization expense	The following table shows the estimated future amortization expense for amortizing intangible assets: ($ in Thousands) Core Deposit Intangibles Other Intangibles Mortgage Servicing Rights Nine Months Ending December 31, 2020 $ 6,608 $ 2,008 $ 9,609 2021 8,811 2,653 13,307 2022 8,811 2,629 10,456 2023 8,811 2,610 8,279 2024 8,811 2,591 6,632 2025 8,811 2,302 5,372 Beyond 2025 22,849 4,418 14,032 Total Estimated Amortization Expense $ 73,512 $ 19,211 $ 67,688

Short and Long-Term Funding (Ta

Short and Long-Term Funding (Tables)	3 Months Ended
	Mar. 31, 2020
Debt Disclosure [Abstract]
Breakdown of short & long-term debt balances	The following table presents the components of short-term funding (funding with original contractual maturities of one year or less), long-term funding (funding with original contractual maturities greater than one year), and FHLB advances (funding based on original contractual maturities): ($ in Thousands) March 31, 2020 December 31, 2019 Short-Term Funding Federal funds purchased $ 24,480 $ 362,000 Securities sold under agreements to repurchase 108,527 71,097 Federal funds purchased and securities sold under agreements to repurchase 133,007 433,097 Commercial paper 33,647 32,016 Total short-term funding $ 166,654 $ 465,113 Long-Term Funding Bank senior notes, at par, due 2021 $ 300,000 $ 300,000 Corporation subordinated notes, at par, due 2025 250,000 250,000 Finance leases 2,210 2,209 Capitalized costs (2,565) (2,866) Total long-term funding 549,644 549,343 Total short and long-term funding, excluding FHLB advances $ 716,299 $ 1,014,456 FHLB Advances Short-term FHLB advances $ 550,000 $ 520,000 Long-term FHLB advances 2,664,194 2,660,967 Total FHLB advances $ 3,214,194 $ 3,180,967 Total short and long-term funding $ 3,930,493 $ 4,195,422
Remaining contractual maturity of securities sold under agreements to repurchase	The remaining contractual maturity of the securities sold under agreements to repurchase on the consolidated balance sheets as of March 31, 2020 and December 31, 2019 are presented in the following table: Remaining Contractual Maturity of the Agreements ($ in Thousands) Overnight and Continuous Up to 30 days 30-90 days Greater than 90 days Total March 31, 2020 Repurchase agreements Agency mortgage-related securities $ 108,527 $ — $ — $ — $ 108,527 Total $ 108,527 $ — $ — $ — $ 108,257 December 31, 2019 Repurchase agreements Agency mortgage-related securities $ 71,097 $ — $ — $ — $ 71,097 Total $ 71,097 $ — $ — $ — $ 71,097

Derivative and Hedging Activi_2

Derivative and Hedging Activities (Tables)	3 Months Ended
	Mar. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary Of Other derivative instruments not designated as hedging instruments	The following table presents the total notional amounts and gross fair values of the Company’s derivatives, as well as the balance sheet netting adjustments as of March 31, 2020 and December 31, 2019. The derivative assets and liabilities are presented on a gross basis prior to the application of bilateral collateral and master netting agreements, but after the variation margin payments with central clearing organizations have been applied as settlement, as applicable. Total derivative assets and liabilities are adjusted to take into consideration the effects of legally enforceable master netting agreements and cash collateral received or paid as of March 31, 2020 and December 31, 2019. The resulting net derivative asset and liability fair values are included in other assets and accrued expenses and other liabilities, respectively, on the consolidated balance sheets. March 31, 2020 December 31, 2019 Asset Liability Asset Liability ($ in Thousands) Notional Amount Fair Value Notional Amount Fair Value Notional Amount Fair Value Notional Amount Fair Value Not designated as hedging instruments Interest rate-related instruments $ 3,430,859 $ 220,445 $ 3,430,859 $ 30,449 $ 3,029,877 $ 77,024 $ 3,029,877 $ 13,073 Foreign currency exchange forwards 322,066 9,272 295,774 9,215 272,636 4,226 264,653 4,048 Commodity contracts 208,621 69,241 203,955 67,592 255,089 20,528 255,165 19,624 Mortgage banking (a) 343,193 12,454 471,000 10,972 255,291 2,527 263,000 710 Gross derivatives before netting $ 311,413 $ 118,228 $ 104,305 $ 37,455 Less: Legally enforceable master netting agreements 2,847 2,847 10,410 10,410 Less: Cash collateral pledged/received 69,654 30,645 1,408 11,365 Total derivative instruments, after netting $ 238,912 $ 84,736 $ 92,487 $ 15,680 (a) Mortgage derivative assets include interest rate lock commitments and mortgage derivative liabilities include forward commitments.
Schedule of cash flow hedging instruments, statements of financial performance and financial position location	The table below identifies the effect of fair value hedge accounting on the Corporation's consolidated statements of income for the three months ended March 31, 2020 and 2019: Location and Amount of Gain or (Loss) Recognized in Income on Three Months Ended March 31, 2020 Three Months Ended March 31, 2019 ($ in Thousands) Interest Income Other Income (Expense) Interest Income Other Income (Expense) Total amounts of income and expense line items presented on the consolidated statements of income in which the effects of the fair value hedge is recorded $ (322) $ (262) $ 166 $ — The effects of fair value hedging: Gain or (loss) on fair value hedging relationships in Subtopic 815-20 Interest contracts Hedged items (322) (262) 2,057 — Derivatives designated as hedging instruments (a) — — (1,891) — (a) Includes net settlements on the derivatives.
Gain (loss) on derivative instruments not designated as hedging instruments	The table below identifies the effect of derivatives not designated as hedging instruments on the Corporation's consolidated statements of income for the three months ended March 31, 2020 and 2019: Consolidated Statements of Income Category of Three Months Ended March 31, ($ in Thousands) 2020 2019 Derivative Instruments Interest rate-related instruments — customer and mirror, net Capital markets, net $ (3,090) $ (672) Foreign currency exchange forwards Capital markets, net (122) 26 Commodity contracts Capital markets, net 746 (567) Interest rate lock commitments (mortgage) Mortgage banking, net 9,928 824 Forward commitments (mortgage) Mortgage banking, net (10,262) 247

Balance Sheet Offsetting (Table

Balance Sheet Offsetting (Tables)	3 Months Ended
	Mar. 31, 2020
Offsetting [Abstract]
Balance sheet offsetting of derivative assets and liabilities	The following table presents the interest rate, commodity, and foreign exchange assets and liabilities subject to an enforceable master netting arrangement. The interest, commodity and foreign exchange agreements the Corporation has with its commercial customers are not subject to an enforceable master netting arrangement and are therefore excluded from this table: Gross Amounts Recognized Gross Amounts Subject to Master Netting Arrangements Offset on the Consolidated Balance Sheets Net Amounts Presented on the Consolidated Balance Sheets Investment Securities Received ($ in Thousands) Derivative Cash Collateral Received Net amount Derivative assets March 31, 2020 $ 72,501 $ (2,847) $ (69,654) $ — $ — $ — December 31, 2019 11,864 (10,410) (1,408) 45 — 45 Gross Amounts Recognized Gross Amounts Subject to Master Netting Arrangements Offset on the Consolidated Balance Sheets Net Amounts Presented on the Consolidated Balance Sheets Investment Securities Pledged ($ in Thousands) Derivative Liabilities Offset Cash Collateral Pledged Net amount Derivative liabilities March 31, 2020 $ 34,014 $ (2,847) $ (30,645) $ 523 $ — $ 523 December 31, 2019 22,189 (10,410) (11,365) 413 — 413

Commitments, Off-Balance Shee_2

Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters (Tables)	3 Months Ended
	Mar. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Summary of lending-related and other commitments	The following is a summary of lending-related commitments: ($ in Thousands) March 31, 2020 December 31, 2019 Commitments to extend credit, excluding commitments to originate residential mortgage loans held for sale (a)(b) $ 8,483,952 $ 9,024,412 Commercial letters of credit (a) 7,966 7,081 Standby letters of credit (c) 265,406 277,969 (a) These off-balance sheet financial instruments are exercisable at the market rate prevailing at the date the underlying transaction will be completed and, thus, are deemed to have no current fair value, or the fair value is based on fees currently charged to enter into similar agreements and was not material at March 31, 2020 or December 31, 2019. (b) Interest rate lock commitments to originate residential mortgage loans held for sale are considered derivative instruments and are disclosed in Note 10. (c) The Corporation has established a liability of $3 million for both March 31, 2020 and December 31, 2019, as an estimate of the fair value of these financial instruments.
Schedule Of Unfunded Commitments [Table Text Block]	The following table presents a summary of the changes in the allowance for unfunded commitments: ($ in Thousands) Three Months Ended March 31, 2020 Year Ended December 31, 2019 Allowance for Unfunded Commitments Balance at beginning of period $ 21,907 $ 24,336 Cumulative effect of ASU 2016-13 adoption (CECL) 18,690 N/A Balance at beginning of period, adjusted 40,597 24,336 Provision for unfunded commitments 15,500 (2,500) Amount recorded at acquisition 179 70 Balance at end of period $ 56,276 $ 21,907

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2020
Fair Value Disclosures [Abstract]
Assets and liabilities measured on recurring basis at fair value	The table below presents the Corporation’s financial instruments measured at fair value on a recurring basis as of March 31, 2020 and December 31, 2019, aggregated by the level in the fair value hierarchy within which those measurements fall: ($ in Thousands) Fair Value Hierarchy March 31, 2020 December 31, 2019 Assets Investment securities available for sale U.S. government SBA agency securities Level 2 $ 10,238 $ — Obligations of state and political subdivisions (municipal securities) Level 2 508,636 546,160 Residential mortgage-related securities FNMA / FHLMC Level 2 104,485 132,660 GNMA Level 2 823,787 985,139 Commercial mortgage-related securities FNMA / FHLMC Level 2 22,773 21,728 GNMA Level 2 1,114,443 1,310,207 FFELP asset backed securities Level 2 341,424 263,693 Other debt securities Level 2 3,000 3,000 Total investment securities available for sale Level 2 2,928,787 3,262,586 Equity securities with readily determinable fair values Level 1 1,618 1,646 Residential loans held for sale Level 2 366,330 136,280 Interest rate-related instruments (a) Level 2 220,445 77,024 Foreign currency exchange forwards (a) Level 2 9,272 4,226 Commodity contracts (a) Level 2 69,241 20,528 Interest rate lock commitments to originate residential mortgage loans held for sale Level 3 12,454 2,527 Liabilities Interest rate-related instruments (a) Level 2 $ 30,449 $ 13,073 Foreign currency exchange forwards (a) Level 2 9,215 4,048 Commodity contracts (a) Level 2 67,592 19,624 Forward commitments to sell residential mortgage loans Level 3 10,972 710
Assets and liabilities measured at fair value using significant unobservable inputs (level 3)	The table below presents a rollforward of the consolidated balance sheets amounts for the three months ended March 31, 2020 and the year ended December 31, 2019, for the Corporation's mortgage derivatives measured on a recurring basis and classified within Level 3 of the fair value hierarchy: ($ in Thousands) Derivative Financial Balance December 31, 2018 $ 140 Total net gains (losses) included in income Mortgage derivative gain (loss) 1,681 Balance December 31, 2019 $ 1,817 Total net gains (losses) included in income Mortgage derivative gain (loss) (334) Balance March 31, 2020 $ 1,482
Equity securities without readily determinable fair value	The following table presents the carrying value of equity securities without readily determinable fair values still held as of March 31, 2020 that are measured under the measurement alternative and the related adjustments recorded during the periods presented for those securities with observable price changes. These securities are included in the nonrecurring fair value tables when applicable price changes are observable. Also shown are the cumulative upward and downward adjustments for the Corporation's equity securities without readily determinable fair values as of March 31, 2020: ($ in Thousands) Equity securities without readily determinable fair values Carrying value as of December 31, 2019 $ 13,444 Carrying value changes — Carrying value as of March 31, 2020 $ 13,444 Cumulative upward carrying value changes between January 1, 2018 and March 31, 2020 $ 13,444 Cumulative downward carrying value changes/impairment between January 1, 2018 and March 31, 2020 $ —
Assets and liabilities measured on nonrecurring basis at fair value	The table below presents the Corporation’s assets measured at fair value on a nonrecurring basis, aggregated by the level in the fair value hierarchy within which those measurements fall: Consolidated Statements of Income Adjustment Recognized on the Consolidated Statements of Income ($ in Thousands) Fair Value Hierarchy Fair Value March 31, 2020 Assets Individually evaluated loans (a) Level 3 $ 103,108 Provision for credit losses $ (23,840) OREO (b) Level 2 1,382 Other noninterest expense (806) Mortgage servicing rights Level 3 58,311 Mortgage banking, net (9,098) Equity securities Level 3 13,444 Investment securities gains (losses), net — December 31, 2019 Assets Impaired loans (c) Level 3 $ 45,792 Provision for credit losses (d) $ (66,172) OREO (b) Level 2 3,565 Other noninterest expense (1,860) Mortgage servicing rights Level 3 72,532 Mortgage banking, net (63) Equity securities Level 3 13,444 Investment securities gains (losses), net 13,444 (a) Includes probable TDRs which are individually analyzed, net of the related allowance for loan losses. (b) If the fair value of the collateral exceeds the carrying amount of the asset, no charge off or adjustment is necessary, the asset is not considered to be carried at fair value, and is therefore not included in the table. (c) Represents individually evaluated impaired loans, net of the related allowance for loan losses. (d) Represents provision for credit losses on individually evaluated impaired loans.
Schedule of assumptions for fair value as of balance sheet date of assets or liabilities that relate to transferor's continuing involvement	The table below presents information about these inputs and further discussion is found above: March 31, 2020 Valuation Technique Significant Unobservable Input Range of Inputs Weighted Average Input Applied Mortgage servicing rights Discounted cash flow Discount rate 9% - 14% 9% Mortgage servicing rights Discounted cash flow Constant prepayment rate 7% - 31% 15% Individually evaluated loans Appraisals / Discounted cash flow Collateral / Discount factor 5% - 67% 44%
Estimated fair values of financial instruments	Fair value estimates are set forth below for the Corporation’s financial instruments: March 31, 2020 December 31, 2019 Fair Value Hierarchy Level Carrying Amount Fair Value Carrying Amount Fair Value ($ in Thousands) Financial assets Cash and due from banks Level 1 $ 480,337 $ 480,337 $ 373,380 $ 373,380 Interest-bearing deposits in other financial institutions Level 1 176,440 176,440 207,624 207,624 Federal funds sold and securities purchased under agreements to resell Level 1 22,455 22,455 7,740 7,740 Investment securities held to maturity, net Level 1 999 1,041 999 1,018 Investment securities held to maturity, net Level 2 2,148,373 2,246,451 2,204,084 2,275,447 Investment securities available for sale Level 2 2,928,787 2,928,787 3,262,586 3,262,586 Equity securities with readily determinable fair values Level 1 1,618 1,618 1,646 1,646 Equity securities without readily determinable fair values Level 3 13,444 13,444 13,444 13,444 FHLB and Federal Reserve Bank stocks Level 2 222,922 222,922 227,347 227,347 Residential loans held for sale Level 2 366,330 366,330 136,280 136,280 Commercial loans held for sale Level 2 — — 15,000 15,000 Loans, net Level 3 24,027,841 24,072,251 22,620,068 22,399,621 Bank and corporate owned life insurance Level 2 674,026 674,026 671,948 671,948 Derivatives (other assets) (a) Level 2 298,958 298,958 101,778 101,778 Interest rate lock commitments to originate residential mortgage loans held for sale (other assets) Level 3 12,454 12,454 2,527 2,527 Financial liabilities Noninterest-bearing demand, savings, interest-bearing demand, and money market accounts Level 3 $ 23,028,235 $ 23,028,235 $ 21,156,261 $ 21,156,261 Brokered CDs and other time deposits (b) Level 2 2,633,345 2,650,937 2,622,803 2,622,803 Short-term funding (c) Level 2 166,654 166,654 465,113 465,113 Long-term funding Level 2 549,644 606,233 549,343 588,774 FHLB advances Level 2 3,214,194 3,394,222 3,180,967 3,207,793 Standby letters of credit (d) Level 2 2,644 2,644 2,710 2,710 Derivatives (accrued expenses and other liabilities) (a) Level 2 107,255 107,255 36,745 36,745 Forward commitments to sell residential mortgage loans (accrued expenses and other liabilities) Level 3 10,972 10,972 710 710 (a) Figures are presented gross before netting. See Note 10 and Note 11 for information relating to the impact of offsetting derivative assets and liabilities and cash collateral with the same counterparty where there is a legally enforceable master netting agreement in place. (b) When the estimated fair value is less than the carrying value, the carrying value is reported as the fair value. (c) The carrying amount is a reasonable estimate of fair value for existing short-term funding. (d) The commitment on standby letters of credit was $265 million at March 31, 2020 and $278 million at December 31, 2019. See Note 12 for additional information on the standby letters of credit and for information on the fair value of lending-related commitments.

Retirement Plans (Tables)

Retirement Plans (Tables)	3 Months Ended
	Mar. 31, 2020
Defined Benefit Plan [Abstract]
Net period benefit cost for the pension and postretirement plans	The components of net periodic pension cost and net periodic benefit cost for the RAP and Postretirement Plan for the three months ended March 31, 2020 and 2019 were as follows: Three Months Ended March 31, ($ in Thousands) 2020 2019 Components of Net Periodic Benefit Cost RAP Service cost $ 2,165 $ 1,925 Interest cost 2,008 2,413 Expected return on plan assets (6,405) (6,075) Amortization of prior service cost (19) (19) Amortization of actuarial loss (gain) 808 65 Total net periodic pension cost $ (1,444) $ (1,691) Postretirement Plan Interest cost $ 20 $ 26 Amortization of prior service cost (19) (19) Amortization of actuarial loss (gain) — (1) Total net periodic benefit cost $ 1 $ 6

Segment Reporting (Tables)

Segment Reporting (Tables)	3 Months Ended
	Mar. 31, 2020
Segment Reporting [Abstract]
Selected segment information	Information about the Corporation’s segments is presented below: Corporate and Commercial Specialty Three Months Ended March 31, ($ in Thousands) 2020 2019 Net interest income $ 113,478 $ 124,294 Net intersegment interest income (expense) (12,336) (19,927) Segment net interest income 101,141 104,368 Noninterest income 34,802 27,394 Total revenue 135,943 131,762 Credit provision 13,174 13,833 Noninterest expense 52,598 56,340 Income (loss) before income taxes 70,172 61,589 Income tax expense (benefit) 13,126 11,920 Net income $ 57,046 $ 49,669 Allocated goodwill $ 530,144 $ 528,832 Community, Consumer, and Business Three Months Ended March 31, ($ in Thousands) 2020 2019 Net interest income $ 74,927 $ 79,686 Net intersegment interest income (expense) 18,685 20,747 Segment net interest income 93,612 100,433 Noninterest income 57,650 58,275 Total revenue 151,262 158,708 Credit provision 5,108 4,685 Noninterest expense 116,431 112,917 Income (loss) before income taxes 29,723 41,106 Income tax expense (benefit) 6,242 8,632 Net income $ 23,481 $ 32,473 Allocated goodwill $ 661,244 $ 640,112 Risk Management and Shared Services Three Months Ended March 31, ($ in Thousands) 2020 2019 Net interest income $ 14,537 $ 11,567 Net intersegment interest income (expense) (6,349) (821) Segment net interest income 8,188 10,746 Noninterest income 5,854 5,533 Total revenue 14,042 16,280 Credit provision 34,719 (12,518) Noninterest expense (a) 23,162 22,414 Income (loss) before income taxes (43,838) 6,384 Income tax expense (benefit) (9,149) 1,840 Net income $ (34,689) $ 4,543 Allocated goodwill $ — $ — Consolidated Total Three Months Ended March 31, ($ in Thousands) 2020 2019 Net interest income $ 202,942 $ 215,547 Net intersegment interest income (expense) — — Segment net interest income 202,942 215,547 Noninterest income 98,306 91,202 Total revenue 301,248 306,749 Credit provision 53,001 6,000 Noninterest expense 192,191 191,671 Income (loss) before income taxes 56,056 109,078 Income tax expense (benefit) 10,219 22,392 Net income $ 45,838 $ 86,686 Allocated goodwill $ 1,191,388 $ 1,168,944 (a) For the three months ended both March 31, 2020 and 2019, the Risk Management and Shared Services segment included $2 million and approximately $632,000 of acquisition related noninterest expense.

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	3 Months Ended
	Mar. 31, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Summary of activity in accumulated other comprehensive income (loss)	The following tables summarize the components of accumulated other comprehensive income (loss) at March 31, 2020 and 2019, including changes during the preceding three month periods as well as any reclassifications out of accumulated other comprehensive income (loss): ($ in Thousands) Investment Defined Benefit Accumulated Balance December 31, 2019 $ 3,989 $ (37,172) $ (33,183) Other comprehensive income (loss) before reclassifications 26,419 — 26,419 Amounts reclassified from accumulated other comprehensive income (loss) Investment securities losses (gains), net (6,118) — (6,118) Personnel expense — (38) (38) Other expense — 808 808 Interest income 556 — 556 Income tax (expense) benefit (5,225) (193) (5,418) Net other comprehensive income (loss) during period 15,632 577 16,209 Balance March 31, 2020 $ 19,620 $ (36,595) $ (16,974) Balance December 31, 2018 $ (75,643) $ (49,330) $ (124,972) Other comprehensive income (loss) before reclassifications 30,490 — 30,490 Amounts reclassified from accumulated other comprehensive income (loss) Investment securities losses (gains), net (1,680) — (1,680) Personnel expense — (38) (38) Other expense — 64 64 Interest income 69 — 69 Income tax (expense) benefit (7,301) (7) (7,308) Net other comprehensive income (loss) during period 21,578 20 21,597 Balance March 31, 2019 $ (54,065) $ (49,310) $ (103,375)

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	3 Months Ended
	Mar. 31, 2020
Revenue Recognition [Abstract]
Disaggregation of revenue by Major source	The Corporation's disaggregated revenue by major source is presented below: Corporate and Commercial Specialty Three Months Ended March 31, ($ in Thousands) 2020 2019 Insurance commissions and fees $ 76 $ 125 Wealth management fees (a) 15,806 15,099 Service charges and deposit account fees 3,551 3,498 Card-based fees (b) 515 434 Other revenue 788 293 Noninterest Income (in-scope of Topic 606) $ 20,736 $ 19,449 Noninterest Income (out-of-scope of Topic 606) 14,066 7,945 Total Noninterest Income $ 34,802 $ 27,394 Community, Consumer, and Business Three Months Ended March 31, ($ in Thousands) 2020 2019 Insurance commissions and fees $ 22,529 $ 25,336 Wealth management fees (a) 5,010 5,080 Service charges and deposit account fees 11,665 11,599 Card-based fees (b) 9,045 8,812 Other revenue 2,286 2,271 Noninterest Income (in-scope of Topic 606) $ 50,535 $ 53,098 Noninterest Income (out-of-scope of Topic 606) 7,115 5,177 Total Noninterest Income $ 57,650 $ 58,275 Risk Management and Shared Services Three Months Ended March 31, ($ in Thousands) 2020 2019 Insurance commissions and fees $ 3 $ 3 Wealth management fees (a) — — Service charges and deposit account fees 5 19 Card-based fees (b) 47 49 Other revenue 23 120 Noninterest Income (in-scope of Topic 606) $ 77 $ 191 Noninterest Income (out-of-scope of Topic 606) 5,777 5,342 Total Noninterest Income $ 5,854 $ 5,533 Consolidated Total Three Months Ended March 31, ($ in Thousands) 2020 2019 Insurance commissions and fees $ 22,608 $ 25,464 Wealth management fees (a) 20,816 20,180 Service charges and deposit account fees 15,222 15,115 Card-based fees (b) 9,607 9,295 Other revenue 3,096 2,684 Noninterest Income (in-scope of Topic 606) $ 71,348 $ 72,738 Noninterest Income (out-of-scope of Topic 606) 26,958 18,465 Total Noninterest Income $ 98,306 $ 91,202 (a) Includes trust, asset management, brokerage, and annuity fees. (b) Certain card-based fees are out-of-scope of Topic 606.
Revenue recognition 606	Below is a listing of performance obligations for the Corporation's main revenue streams: Revenue Stream Noninterest income in-scope of Topic 606 Insurance commissions and fees The Corporation's insurance revenue has two distinct performance obligations. The first performance obligation is the selling of the policy as an agent for the carrier. This performance obligation is satisfied upon binding of the policy. The second performance obligation is the ongoing servicing of the policy which is satisfied over the life of the policy. For employee benefits, the payment is typically received monthly. For property and casualty, payments can vary, but are typically received at, or in advance, of the policy period. Service charges and deposit account fees Service charges and deposit account fees consist of monthly service fees (i.e. business analyzed fees and consumer service charges) and other deposit account related fees. The Corporation's performance obligation for monthly service fees is generally satisfied, and the related revenue recognized, over the period in which the service is provided. Other deposit account related fees are largely transactional based, and therefore, the Corporation's performance obligation is satisfied, and related revenue recognized, at a point in time. Payment for service charges and deposit account fees are primarily received immediately or in the following month through a direct charge to customers’ accounts. Card-based fees (a) Card-based fees are primarily comprised of debit and credit card income, ATM fees, and merchant services income. Debit and credit card income is primarily comprised of interchange fees earned whenever the Corporation's debit and credit cards are processed through card payment networks. ATM and merchant fees are largely transactional based, and therefore, the Corporation's performance obligation is satisfied, and related revenue recognized, at a point in time. Payment is typically received immediately or in the following month. Trust and asset management fees (b) Trust and asset management income is primarily comprised of fees earned from the management and administration of trusts and other customer assets. The Corporation's performance obligation is generally satisfied over time and the resulting fees are recognized monthly, based upon the month-end market value of the assets under management and the applicable fee rate. Payment is generally received a few days after month end through a direct charge to the customers’ accounts. The Corporation's performance obligation for these transactional-based services is generally satisfied, and related revenue recognized, at a point in time (i.e., as incurred). Payment is received shortly after services are rendered. Brokerage commissions and fees (b) Brokerage commissions and fees primarily consist of investment advisory, brokerage, retirement services, and annuities. The Corporation's performance obligation for investment advisory services and retirement services is generally satisfied, and the related revenue recognized, over the period in which the services are provided. The performance obligation for annuities is satisfied upon sale of the annuity, and therefore, the related revenue is primarily recognized at the time of sale. Payments for these services are typically received immediately or in advance of the service. (a) Certain card-based fees are out-of-scope of Topic 606. (b) Trust and asset management fees and brokerage commissions and fees are included in wealth management fees.

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2020
Leases [Abstract]
Lease, Cost and Cash Flows	Operating and finance lease costs and cash flows resulting from these leases are presented below: ($ in Thousands) Three Months Ended March 31, 2020 Three Months Ended March 31, 2019 Operating Lease Costs $ 2,623 $ 2,905 Finance Lease Costs 36 — Operating Lease Cash Flows 2,731 2,809 Finance Lease Cash Flows 21 —
Components of lease expense	The lease classifications on the consolidated balance sheets were as follows: March 31, 2020 December 31, 2019 ($ in Thousands) Consolidated Balance Sheets Category Amount Operating lease right-of-use asset Premises and equipment $ 43,321 $ 45,381 Finance lease right-of-use asset Other assets 2,174 2,188 Operating lease liability Accrued expenses and other liabilities 47,136 49,292 Finance lease liability Other long-term funding 2,210 2,209
Operating lease information	The lease payment obligations, weighted-average remaining lease term, and weighted-average discount rate were as follows: March 31, 2020 December 31, 2019 ($ in Thousands) Lease payments Weighted-average lease term (in years) Weighted-average discount rate Lease payments Weighted-average lease term (in years) Weighted-average discount rate Operating leases Equipment $ 37 0.81 2.72 % $ 46 0.83 2.72 % Retail and corporate offices 46,476 6.37 3.34 % 48,940 6.49 3.34 % Land 6,533 9.32 3.20 % 6,594 9.57 3.21 % Total operating leases $ 53,046 6.71 3.33 % $ 55,580 6.83 3.32 % Finance leases Land $ 4,805 39.42 3.99 % $ 4,827 39.67 3.99 % Total finance leases $ 4,805 39.42 3.99 % $ 4,827 39.67 3.99 %
Amortization of operating lease liabilities	Contractual lease payment obligations for each of the next five years and thereafter, in addition to a reconciliation to the Corporation’s lease liability, were as follows: ($ in Thousands) Operating Leases Finance Leases Amount Nine Months Ending December 31, 2020 $ 7,992 $ 64 $ 8,056 2021 10,203 85 10,288 2022 7,914 85 7,999 2023 5,696 85 5,781 2024 5,058 88 5,147 Beyond 2024 16,183 4,398 20,581 Total lease payments 53,046 4,805 57,851 Less: interest 5,910 2,595 8,506 Present value of lease payments $ 47,136 $ 2,210 $ 49,345

Acquisitions Staunton Acquisiti

Acquisitions Staunton Acquisition (Details) - USD ($) $ in Thousands	Feb. 14, 2020	Mar. 31, 2020	Mar. 31, 2019
February 14, 2020
Fair value of liabilities assumed		$ 479,985	$ 0
First Staunton Bancshares [Member]
Purchase Accounting Adjustments
Cash and cash equivalents	$ 0
Investment securities available for sale	(24)
Federal Home Loan Bank and Federal Reserve Bank stocks, at cost	0
Loans	(4,808)
Premises and equipment, net	(3,005)
Bank owned life insurance	9
Core deposit intangibles (included in other intangible assets, net on the face of the consolidated balance sheets)	7,379
OREO (included in other assets on the face of the consolidated balance sheets)	670
Other assets	2,486
Deposits	1,285
Other borrowings	61
Accrued expenses and other liabilities	179
February 14, 2020
Cash and cash equivalents	44,848
Investment securities available for sale	98,743
Federal Home Loan Bank and Federal Reserve Bank stocks, at cost	781
Loans	369,684
Premises and equipment, net	4,865
Bank owned life insurance	6,770
Goodwill	15,158
Core deposit intangibles (included in other intangible assets, net on the face of the consolidated balance sheets)	7,379
OREO (included in other assets on the face of the consolidated balance sheets)	762
Other assets	7,293
Total assets	556,285
Deposits	438,684
Other borrowings	34,613
Accrued expenses and other liabilities	6,688
Fair value of liabilities assumed	479,985
Total consideration paid	$ 76,300

Acquisitions Huntington Acquisi

Acquisitions Huntington Acquisition (Details) - USD ($) $ in Thousands	Jun. 14, 2019	Sep. 30, 2019	Mar. 31, 2020	Mar. 31, 2019
June 14, 2019
Fair value of liabilities assumed			$ 479,985	$ 0
Huntington National Bank
Purchase Accounting Adjustments
Cash and cash equivalents	$ 0
Loans	(1,552)
Premises and equipment, net	4,800
Core deposit intangibles (included in other intangible assets, net on the face of the consolidated balance sheets)	22,630
OREO (included in other assets on the face of the consolidated balance sheets)	(2,561)
Other assets	0
Deposits	156
Other liabilities	70
June 14, 2019
Cash and cash equivalents	551,250
Loans	116,346
Premises and equipment, net	22,430
Goodwill	7,286	$ 210
Core deposit intangibles (included in other intangible assets, net on the face of the consolidated balance sheets)	22,630
OREO (included in other assets on the face of the consolidated balance sheets)	5,263
Other assets	559
Total assets	725,764
Deposits	725,173
Other liabilities	590
Fair value of liabilities assumed	$ 725,764

Acquisitions, PCD Loans (Detail

Acquisitions, PCD Loans (Details) $ in Thousands	Feb. 14, 2020USD ($)
Business Combinations [Abstract]
Purchase price of loans at acquisition	$ 77,221
Allowance for credit losses at acquisition	3,504
Non-credit discount/(premium) at acquisition	(951)
Par value of acquired loans at acquisition	$ 79,774

Acquisitions (Details Textuals)

Acquisitions (Details Textuals) $ in Thousands	Feb. 14, 2020USD ($)branch	Jun. 14, 2019USD ($)branch	Sep. 30, 2019USD ($)
First Staunton Bancshares [Member]
Business Acquisition [Line Items]
Effective Date of Acquisition	Feb. 14, 2020
Business Acquisition, Name of Acquired Entity	First Staunton
Business Combination, Control Obtained Description	The Corporation paid a 4% premium on acquired deposits.
New Communities | branch	9
Acquired Net Branches | branch	7
Goodwill | $	$ 15,158
PCD - HTM Securities | $	0
PCD - AFS Securities | $	$ 0
Amortization period	10 years
Huntington National Bank
Business Acquisition [Line Items]
Effective Date of Acquisition		Jun. 14, 2019
Business Acquisition, Name of Acquired Entity		Huntington
Business Combination, Control Obtained Description		The Corporation paid a 4% premium on acquired deposits
New Communities | branch		13
Acquired Net Branches | branch		14
Goodwill | $		$ 7,286	$ 210
Amortization period		10 years

Summary of Significant Accoun_4

Summary of Significant Accounting Policies, Credit Loss Adoption Impact (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses			$ 201,371
Allowance for Unfunded Commitments	$ 56,276		21,907
Total commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses			166,846
Allowance for Unfunded Commitments			20,465
Total consumer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses			34,525
Allowance for Unfunded Commitments			1,443
Commercial and Industrial Sector | Total commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses			91,133
Allowance for Unfunded Commitments			12,276
Commercial real estate — owner occupied | Total commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses			10,284
Allowance for Unfunded Commitments			127
Commercial and business lending | Total commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses			101,417
Allowance for Unfunded Commitments			12,403
Commercial real estate — investor | Total commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses			40,514
Allowance for Unfunded Commitments			530
Real Estate Construction | Total commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses			24,915
Allowance for Unfunded Commitments			7,532
Commercial Real Estate | Total commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses			65,428
Allowance for Unfunded Commitments			8,062
Residential mortgage | Total consumer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses			16,960
Allowance for Unfunded Commitments			0
Home Equity Loan | Total consumer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses			10,926
Allowance for Unfunded Commitments			1,038
Other consumer | Total consumer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses			6,639
Allowance for Unfunded Commitments			$ 405
Cumulative Effect, Period Of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses		$ 131,147
Cumulative Effect, Period Of Adoption, Adjustment | Total commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses		75,171
Cumulative Effect, Period Of Adoption, Adjustment | Total consumer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses		55,975
Cumulative Effect, Period Of Adoption, Adjustment | Commercial and Industrial Sector | Total commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses		48,921
Cumulative Effect, Period Of Adoption, Adjustment | Commercial real estate — owner occupied | Total commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses		(1,851)
Cumulative Effect, Period Of Adoption, Adjustment | Commercial and business lending | Total commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses		47,070
Cumulative Effect, Period Of Adoption, Adjustment | Commercial real estate — investor | Total commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses		2,287
Cumulative Effect, Period Of Adoption, Adjustment | Real Estate Construction | Total commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses		25,814
Cumulative Effect, Period Of Adoption, Adjustment | Commercial Real Estate | Total commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses		28,101
Cumulative Effect, Period Of Adoption, Adjustment | Residential mortgage | Total consumer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses		33,215
Cumulative Effect, Period Of Adoption, Adjustment | Home Equity Loan | Total consumer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses		14,240
Cumulative Effect, Period Of Adoption, Adjustment | Other consumer | Total consumer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses		8,520
Cumulative Effect, Period Of Adoption, Adjusted Balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses		354,425
Cumulative Effect, Period Of Adoption, Adjusted Balance | Total commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses		262,482
Cumulative Effect, Period Of Adoption, Adjusted Balance | Total consumer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses		91,943
Cumulative Effect, Period Of Adoption, Adjusted Balance | Commercial and Industrial Sector | Total commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses		152,330
Cumulative Effect, Period Of Adoption, Adjusted Balance | Commercial real estate — owner occupied | Total commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses		8,560
Cumulative Effect, Period Of Adoption, Adjusted Balance | Commercial and business lending | Total commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses		160,890
Cumulative Effect, Period Of Adoption, Adjusted Balance | Commercial real estate — investor | Total commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses		43,331
Cumulative Effect, Period Of Adoption, Adjusted Balance | Real Estate Construction | Total commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses		58,261
Cumulative Effect, Period Of Adoption, Adjusted Balance | Commercial Real Estate | Total commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses		101,591
Cumulative Effect, Period Of Adoption, Adjusted Balance | Residential mortgage | Total consumer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses		50,175
Cumulative Effect, Period Of Adoption, Adjusted Balance | Home Equity Loan | Total consumer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses		26,204
Cumulative Effect, Period Of Adoption, Adjusted Balance | Other consumer | Total consumer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses		$ 15,564

Summary of Significant Accoun_5

Summary of Significant Accounting Policies Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Mar. 31, 2020		Jan. 01, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained Earnings (Accumulated Deficit)		$ 2,296,176	[1]		$ 2,380,867
Held to maturity allowance for credit loss		61		$ 61
Allowance for Loan Losses					201,371
Cumulative Effect, Period Of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses				131,147
Allowance for Loan Losses [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses		$ 337,793			$ 201,371
Accounting Standards Update 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained Earnings (Accumulated Deficit)				98,000
Deferred Income Tax Assets, Net				33,000
Accounting Standards Update 2016-13 | Forecast
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reasonable and Supportable Period 2016-13	2 years
Accounting Standards Update 2016-13 | Allowance for Loan Losses [Member] | Cumulative Effect, Period Of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses				112,000
Accounting Standards Update 2016-13 | Allowance for Loans Losses and Unfunded Commitments [Member] | Cumulative Effect, Period Of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Loan Losses				$ 131,000
[1]	(b) At January 1, 2020, the adoption of ASU 2016-13 resulted in an increase to the allowance for loan losses of $112 million and an increase to the allowance for unfunded commitments of $19 million for a total increase to the ACLL of $131 million. A corresponding after tax decrease to common equity of $98 million was recorded along with a deferred tax asset of $33 million, included in accrued expenses and other liabilities. Prior periods were unadjusted due to the modified retrospective application of ASU 2016-13.

Earnings Per Common Share (Deta

Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Calculations for basic and diluted earnings per common share
Net income	$ 45,838	$ 86,686
Preferred stock dividends	(3,801)	(3,801)
Net income available to common equity	42,037	82,885
Common shareholder dividends	(28,264)	(28,080)
Unvested share-based payment awards	(128)	(103)
Undistributed earnings	13,645	54,702
Undistributed earnings allocated to common shareholders	13,555	54,410
Undistributed earnings allocated to unvested share-based payment awards	90	292
Undistributed earnings	13,645	54,702
Basic
Distributed earnings to common shareholders	28,264	28,080
Undistributed earnings allocated to common shareholders	13,555	54,410
Total common shareholders earnings, basic	41,819	82,490
Diluted
Distributed earnings to common shareholders	28,264	28,080
Undistributed earnings allocated to common shareholders	13,555	54,410
Total common shareholders earnings, diluted	$ 41,819	$ 82,490
Weighted average common shares outstanding	154,701	163,928
Effect of dilutive common stock awards	918	1,505
Diluted weighted average common shares outstanding	155,619	165,433
Basic earnings per common share	$ 0.27	$ 0.50
Diluted earnings per common share	$ 0.27	$ 0.50

Earnings Per Common Share (De_2

Earnings Per Common Share (Details Textuals) - shares shares in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Approximate anti-dilutive stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	4	3

Stock-Based Compensation Fair V

Stock-Based Compensation Fair Value Assumptions of Stock Options (Details) - $ / shares	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Retirement Benefits [Abstract]
Dividend yield	3.50%	3.30%
Risk-free interest rate	1.60%	2.60%
Weighted average expected volatility	21.00%	24.00%
Weighted average expected life	5 years 9 months	5 years 9 months
Weighted average per share fair value of options	$ 2.39	$ 4

Stock-Based Compensation, Stock

Stock-Based Compensation, Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Stock Options Shares Outstanding, Beginning balance (in shares)	5,543
Granted	1,697
Exercised	(102)
Forfeited or expired	(159)
Stock Options Shares Outstanding, Ending balance (in shares)	6,978	5,543
Options exercisable (in shares)	4,090
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Stock Option Outstanding, Weighted Average Exercise Price, Beginning balance (in usd per share)	$ 20.13
Granted	18.43
Exercised	13.98
Forfeited	22.52
Stock Option Outstanding, Weighted Average Exercise Price, Ending balance (in usd per share)	19.75	$ 20.13
Options Exercisable, Weighted Average Exercise Price (in usd per share)	$ 19.15
Stock Options Outstanding, Weighted Average Remaining Contractual Term	6 years 11 months 15 days	6 years 3 months
Options exercisable, Weighted Average Remaining Contractual Term	5 years 4 months 13 days
Stock Options Outstanding, Aggregate Intrinsic Value, Beginning balance	$ 16,043
Stock Options Outstanding, Aggregate Intrinsic Value, Ending balance	19	$ 16,043
Options exercisable, Aggregate Intrinsic Value	$ 19

Stock-Based Compensation, Restr

Stock-Based Compensation, Restricted Stock Activity (Details) shares in Thousands	3 Months Ended
	Mar. 31, 2020$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding Shares, Beginning balance (in shares) | shares	2,393
Granted | shares	1,018
Vested | shares	(752)
Forfeited | shares	(61)
Outstanding Shares, Ending balance (in shares) | shares	2,598
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Outstanding, Weighted Average Grant Date Fair Value, Beginning balance (in usd per share) | $ / shares	$ 22.39
Granted, Weighted Average Grant Date Fair Value | $ / shares	18.54
Vested, Weighted Average Grant Date Fair Value | $ / shares	23.33
Forfeited, Weighted Average Grant Date Fair Value | $ / shares	23.12
Outstanding Weighted Average Grant Date Fair Value, Ending balance (in usd per share) | $ / shares	$ 20.59

Stock-Based Compensation (Detai

Stock-Based Compensation (Details Textuals) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award
Intrinsic value of stock options exercised	$ 1	$ 2
Total fair value of vested stock options	$ 3	4
Minimum
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	0.00%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	150.00%
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award
Recognized compensation expense for vesting	$ 2	$ 1
Recognized compensation expense for accelerated vesting	1
Unvested share-based payment awards	$ 6
Remaining requisite service periods, extend through	first quarter of 2024
Performance-based Restricted Stock Award
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years	3 years
Service-based Restricted Stock Award
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years	4 years
Restricted Stock Award
Share-based Compensation Arrangement by Share-based Payment Award
Recognized compensation expense for vesting	$ 9	$ 8
Recognized compensation expense for accelerated vesting	2
Unvested share-based payment awards	$ 27
Remaining requisite service periods, extend through	first quarter of 2024

Investment Securities, AFS and

Investment Securities, AFS and HTM Securities Amortized Costs and Fair Values (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Investment securities available for sale
Amortized Cost	$ 2,897,851	$ 3,251,950
Gross Unrealized Gains	54,231	30,920
Gross Unrealized (Losses)	(23,295)	(20,284)
Fair Value	2,928,787	3,262,586
Investment securities held to maturity
Held to Maturity, Amortized Cost	2,149,434	2,205,083
Held-to-maturity, Gross Unrealized Gains	100,534	79,744
Held-to-maturity, Gross Unrealized Loss	(2,414)	(8,363)
Held-to-maturity, Fair Value	2,247,553	2,276,465
Debt Securities, AFS, Principal Sold	281,000
U. S. Treasury securities
Investment securities held to maturity
Held to Maturity, Amortized Cost	999	999
Held-to-maturity, Gross Unrealized Gains	42	19
Held-to-maturity, Gross Unrealized Loss	0	0
Held-to-maturity, Fair Value	1,041	1,018
U.S. government SBA agency securities
Investment securities available for sale
Amortized Cost	10,241
Gross Unrealized Gains	2
Gross Unrealized (Losses)	(5)
Fair Value	10,238
Investment securities held to maturity
Held to Maturity, Amortized Cost	0
Held-to-maturity, Fair Value	0
Obligations of state and political subdivisions (municipal securities)
Investment securities available for sale
Amortized Cost	492,195	529,908
Gross Unrealized Gains	16,443	16,269
Gross Unrealized (Losses)	(1)	(18)
Fair Value	508,636	546,160
Investment securities held to maturity
Held to Maturity, Amortized Cost	1,426,543	1,418,569
Held-to-maturity, Gross Unrealized Gains	82,382	69,775
Held-to-maturity, Gross Unrealized Loss	(475)	(1,118)
Held-to-maturity, Fair Value	1,508,451	1,487,227
FFELP asset backed securities
Investment securities available for sale
Amortized Cost	360,658	270,178
Gross Unrealized Gains	0	0
Gross Unrealized (Losses)	(19,234)	(6,485)
Fair Value	341,424	263,693
Investment securities held to maturity
Held to Maturity, Amortized Cost	0
Held-to-maturity, Fair Value	0
Other debt securities
Investment securities available for sale
Amortized Cost	3,000	3,000
Gross Unrealized Gains	0	0
Gross Unrealized (Losses)	0	0
Fair Value	3,000	3,000
FNMA / FHLMC | Residential mortgage-related securities
Investment securities available for sale
Amortized Cost	103,576	131,158
Gross Unrealized Gains	908	1,562
Gross Unrealized (Losses)	0	(59)
Fair Value	104,485	132,660
Investment securities held to maturity
Held to Maturity, Amortized Cost	78,125	81,676
Held-to-maturity, Gross Unrealized Gains	3,486	1,759
Held-to-maturity, Gross Unrealized Loss	0	(15)
Held-to-maturity, Fair Value	81,610	83,420
FNMA / FHLMC | Commercial mortgage-related securities
Investment securities available for sale
Amortized Cost	19,861	19,929
Gross Unrealized Gains	2,912	1,799
Gross Unrealized (Losses)	0	0
Fair Value	22,773	21,728
Investment securities held to maturity
Held to Maturity, Amortized Cost	0
Held-to-maturity, Fair Value	0
GNMA | Residential mortgage-related securities
Investment securities available for sale
Amortized Cost	799,983	982,941
Gross Unrealized Gains	23,804	3,887
Gross Unrealized (Losses)	0	(1,689)
Fair Value	823,787	985,139
Investment securities held to maturity
Held to Maturity, Amortized Cost	245,675	269,523
Held-to-maturity, Gross Unrealized Gains	8,124	1,882
Held-to-maturity, Gross Unrealized Loss	0	(1,108)
Held-to-maturity, Fair Value	253,799	270,296
GNMA | Commercial mortgage-related securities
Investment securities available for sale
Amortized Cost	1,108,336	1,314,836
Gross Unrealized Gains	10,162	7,403
Gross Unrealized (Losses)	(4,055)	(12,032)
Fair Value	1,114,443	1,310,207
Investment securities held to maturity
Held to Maturity, Amortized Cost	398,092	434,317
Held-to-maturity, Gross Unrealized Gains	6,500	6,308
Held-to-maturity, Gross Unrealized Loss	(1,939)	(6,122)
Held-to-maturity, Fair Value	$ 402,653	$ 434,503

Investment Securities, AFS an_2

Investment Securities, AFS and HTM Contractual Maturities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Amortized Cost
Available for Sale, Due in one year or less	$ 10,731
Available for Sale, Due after one year through five years	30,829
Available for Sale, Due after five years through ten years	324,501
Available for Sale, Due after ten years	129,134
Available for Sale, Total debt securities	495,195
Available for Sale, amortized cost	2,897,851	$ 3,251,950
Fair Value
Available for Sale, Due in one year or less	10,738
Available for Sale, Due after one year through five years	31,242
Available for Sale, Due after five years through ten years	334,499
Available for Sale, Due after ten years	135,157
Available for Sale, Total debt securities	511,636
Investment securities available for sale, at fair value	$ 2,928,787	3,262,586
Available for Sale, Ratio of Fair Value to Amortized Cost	101.10%
Amortized Cost
Held to Maturity, Due in one year or less	$ 32,555
Held to Maturity, Due after one year through five years	77,586
Held to Maturity, Due after five years through ten years	153,519
Held to Maturity, Due after ten years	1,163,883
Held to Maturity, Total Debt Securities	1,427,542
Held to Maturity, Amortized Cost	2,149,434	2,205,083
Fair Value
Held to Maturity, Due in one year or less	32,703
Held to Maturity, Due after one year through five years	78,683
Held to Maturity, Due after five years through ten years	158,843
Held to Maturity, Due after ten years	1,239,262
Held to Maturity, Securities, Debt Securities	1,509,492
Held to Maturity, Total debt securities at fair value	$ 2,247,553	2,276,465
Held to Maturity, Ratio of Fair Value to Amortized Cost	104.60%
U.S. government SBA agency securities
Amortized Cost
Available for Sale, amortized cost	$ 10,241
Fair Value
Investment securities available for sale, at fair value	10,238
Amortized Cost
Held to Maturity, Amortized Cost	0
Fair Value
Held to Maturity, Total debt securities at fair value	0
FFELP asset backed securities
Amortized Cost
Available for Sale, amortized cost	360,658	270,178
Fair Value
Investment securities available for sale, at fair value	341,424	263,693
Amortized Cost
Held to Maturity, Amortized Cost	0
Fair Value
Held to Maturity, Total debt securities at fair value	0
FNMA/FHLMC | Residential Related Securities
Amortized Cost
Available for Sale, amortized cost	103,576	131,158
Fair Value
Investment securities available for sale, at fair value	104,485	132,660
Amortized Cost
Held to Maturity, Amortized Cost	78,125	81,676
Fair Value
Held to Maturity, Total debt securities at fair value	81,610	83,420
FNMA/FHLMC | Commercial mortgage-related securities
Amortized Cost
Available for Sale, amortized cost	19,861	19,929
Fair Value
Investment securities available for sale, at fair value	22,773	21,728
Amortized Cost
Held to Maturity, Amortized Cost	0
Fair Value
Held to Maturity, Total debt securities at fair value	0
GNMA | Residential Related Securities
Amortized Cost
Available for Sale, amortized cost	799,983	982,941
Fair Value
Investment securities available for sale, at fair value	823,787	985,139
Amortized Cost
Held to Maturity, Amortized Cost	245,675	269,523
Fair Value
Held to Maturity, Total debt securities at fair value	253,799	270,296
GNMA | Commercial mortgage-related securities
Amortized Cost
Available for Sale, amortized cost	1,108,336	1,314,836
Fair Value
Investment securities available for sale, at fair value	1,114,443	1,310,207
Amortized Cost
Held to Maturity, Amortized Cost	398,092	434,317
Fair Value
Held to Maturity, Total debt securities at fair value	$ 402,653	$ 434,503

Investment Securities, HTM Cred

Investment Securities, HTM Credit Quality Indicators (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Schedule of Held-to-maturity Securities [Line Items]
Investment securities held to maturity, net	$ 2,149,434	$ 2,205,083
US Treasury Securities
Schedule of Held-to-maturity Securities [Line Items]
Investment securities held to maturity, net	999	999
Obligations of state and political subdivisions (municipal securities)
Schedule of Held-to-maturity Securities [Line Items]
Investment securities held to maturity, net	1,426,543	$ 1,418,569
FNMA/FHLMC
Schedule of Held-to-maturity Securities [Line Items]
Investment securities held to maturity, net	78,125
GNMA
Schedule of Held-to-maturity Securities [Line Items]
Investment securities held to maturity, net	245,675
GNMA commercial mortgage-related securities
Schedule of Held-to-maturity Securities [Line Items]
Investment securities held to maturity, net	398,092
AAA
Schedule of Held-to-maturity Securities [Line Items]
Investment securities held to maturity, net	1,266,510
AAA | US Treasury Securities
Schedule of Held-to-maturity Securities [Line Items]
Investment securities held to maturity, net	999
AAA | Obligations of state and political subdivisions (municipal securities)
Schedule of Held-to-maturity Securities [Line Items]
Investment securities held to maturity, net	543,620
AAA | FNMA/FHLMC
Schedule of Held-to-maturity Securities [Line Items]
Investment securities held to maturity, net	78,125
AAA | GNMA
Schedule of Held-to-maturity Securities [Line Items]
Investment securities held to maturity, net	245,675
AAA | GNMA commercial mortgage-related securities
Schedule of Held-to-maturity Securities [Line Items]
Investment securities held to maturity, net	398,092
AA
Schedule of Held-to-maturity Securities [Line Items]
Investment securities held to maturity, net	862,040
AA | US Treasury Securities
Schedule of Held-to-maturity Securities [Line Items]
Investment securities held to maturity, net	0
AA | Obligations of state and political subdivisions (municipal securities)
Schedule of Held-to-maturity Securities [Line Items]
Investment securities held to maturity, net	862,040
AA | FNMA/FHLMC
Schedule of Held-to-maturity Securities [Line Items]
Investment securities held to maturity, net	0
AA | GNMA
Schedule of Held-to-maturity Securities [Line Items]
Investment securities held to maturity, net	0
AA | GNMA commercial mortgage-related securities
Schedule of Held-to-maturity Securities [Line Items]
Investment securities held to maturity, net	0
A
Schedule of Held-to-maturity Securities [Line Items]
Investment securities held to maturity, net	20,883
A | US Treasury Securities
Schedule of Held-to-maturity Securities [Line Items]
Investment securities held to maturity, net	0
A | Obligations of state and political subdivisions (municipal securities)
Schedule of Held-to-maturity Securities [Line Items]
Investment securities held to maturity, net	20,883
A | FNMA/FHLMC
Schedule of Held-to-maturity Securities [Line Items]
Investment securities held to maturity, net	0
A | GNMA
Schedule of Held-to-maturity Securities [Line Items]
Investment securities held to maturity, net	0
A | GNMA commercial mortgage-related securities
Schedule of Held-to-maturity Securities [Line Items]
Investment securities held to maturity, net	$ 0

Investment Securities Gain_Loss

Investment Securities Gain/Loss Sale of Securities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Gross gains on available for sale securities	$ 6,198	$ 1,680
Gross gains on held to maturity securities	0	0
Total gains	6,198	1,680
Gross (losses) on available for sale securities	(80)	0
Gross (losses) on held to maturity securities	0	0
Total (losses)	(80)	0
Investment securities gains (losses), net	6,118	1,680
Proceeds from sales of investment securities	$ 365,239	$ 131,122

Investment Securities, AFS an_3

Investment Securities, AFS and HTM Securities Gross Unrealized Losses (Details) $ in Thousands	Mar. 31, 2020USD ($)security	Dec. 31, 2019USD ($)security
Investment securities available for sale
Unrealized losses on available for sale securities, less than 12 months	$ (12,089)	$ (7,843)
Unrealized losses on available for sale securities, 12 months or more	(11,206)	(12,440)
Total unrealized losses on available for sale securities	(23,295)	(20,284)
Fair value of unrealized losses on available for sale securities, less than 12 months	489,740	834,616
Fair value of unrealized losses on available for sale securities, 12 months or more	257,838	748,487
Total fair value of unrealized losses on available for sale securities	$ 747,578	$ 1,583,104
Available-for-sale, Number of Securities
Available for sale, number of securities, less than 12 months | security	52	65
Available for sale, number of securities, 12 months or more | security	18	51
Investment securities held to maturity
Unrealized losses on held to maturity securities, less than 12 months	$ (802)	$ (2,199)
Unrealized losses on held to maturity securities, 12 months or more	(1,612)	(6,164)
Total unrealized losses on held to maturity securities	$ (2,414)	$ (8,363)
Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, 12 Months or Longer | security	10	36
Fair value of unrealized losses on held to maturity securities, less than 12 months	$ 154,950	$ 292,267
Fair value of unrealized losses on held to maturity securities, 12 months or more	127,166	367,532
Total fair value of unrealized losses on held to maturity securities	$ 282,116	$ 659,799
Held-to-maturity, Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions, less than 12 Months | security	31	67
U.S. government SBA agency securities
Investment securities available for sale
Unrealized losses on available for sale securities, less than 12 months	$ (5)
Unrealized losses on available for sale securities, 12 months or more	0
Total unrealized losses on available for sale securities	(5)
Fair value of unrealized losses on available for sale securities, less than 12 months	4,958
Fair value of unrealized losses on available for sale securities, 12 months or more	0
Total fair value of unrealized losses on available for sale securities	$ 4,958
Available-for-sale, Number of Securities
Available for sale, number of securities, less than 12 months | security	7
Available for sale, number of securities, 12 months or more | security	0
Obligations of state and political subdivisions (municipal securities)
Investment securities available for sale
Unrealized losses on available for sale securities, less than 12 months	$ (1)	$ (18)
Unrealized losses on available for sale securities, 12 months or more	0	0
Total unrealized losses on available for sale securities	(1)	(18)
Fair value of unrealized losses on available for sale securities, less than 12 months	1,313	1,225
Fair value of unrealized losses on available for sale securities, 12 months or more	0	0
Total fair value of unrealized losses on available for sale securities	$ 1,313	$ 1,225
Available-for-sale, Number of Securities
Available for sale, number of securities, less than 12 months | security	5	4
Available for sale, number of securities, 12 months or more | security	0	0
Investment securities held to maturity
Unrealized losses on held to maturity securities, less than 12 months	$ (470)	$ (1,105)
Unrealized losses on held to maturity securities, 12 months or more	(5)	(13)
Total unrealized losses on held to maturity securities	(475)	(1,118)
Fair value of unrealized losses on held to maturity securities, less than 12 months	28,779	77,562
Fair value of unrealized losses on held to maturity securities, 12 months or more	542	2,378
Total fair value of unrealized losses on held to maturity securities	$ 29,321	$ 79,940
Obligations of state and political subdivisions (municipal securities) | Held to maturity, number of securities, less than 12 months
Investment securities held to maturity
Number of held to maturity securities in a continuous unrealized loss position | security	22	52
Obligations of state and political subdivisions (municipal securities) | Held to maturity, number of securities, 12 months or more
Investment securities held to maturity
Number of held to maturity securities in a continuous unrealized loss position | security	3	6
FFELP asset backed securities
Investment securities available for sale
Unrealized losses on available for sale securities, less than 12 months	$ (10,971)	$ (6,092)
Unrealized losses on available for sale securities, 12 months or more	(8,262)	(393)
Total unrealized losses on available for sale securities	(19,234)	(6,485)
Fair value of unrealized losses on available for sale securities, less than 12 months	222,197	250,780
Fair value of unrealized losses on available for sale securities, 12 months or more	119,228	12,913
Total fair value of unrealized losses on available for sale securities	$ 341,424	$ 263,693
Available-for-sale, Number of Securities
Available for sale, number of securities, less than 12 months | security	16	19
Available for sale, number of securities, 12 months or more | security	10	2
Other Debt securities
Investment securities available for sale
Unrealized losses on available for sale securities, less than 12 months	$ 0	$ 0
Unrealized losses on available for sale securities, 12 months or more	0	0
Total unrealized losses on available for sale securities	0	0
Fair value of unrealized losses on available for sale securities, less than 12 months	2,000	2,000
Fair value of unrealized losses on available for sale securities, 12 months or more	0	0
Total fair value of unrealized losses on available for sale securities	$ 2,000	$ 2,000
Available-for-sale, Number of Securities
Available for sale, number of securities, less than 12 months | security	2	2
Available for sale, number of securities, 12 months or more | security	0	0
FNMA/FHLMC | Residential Related Securities
Investment securities available for sale
Unrealized losses on available for sale securities, less than 12 months		$ 0
Unrealized losses on available for sale securities, 12 months or more		(59)
Total unrealized losses on available for sale securities		(59)
Fair value of unrealized losses on available for sale securities, less than 12 months		0
Fair value of unrealized losses on available for sale securities, 12 months or more		34,807
Total fair value of unrealized losses on available for sale securities		$ 34,807
Available-for-sale, Number of Securities
Available for sale, number of securities, less than 12 months | security		0
Available for sale, number of securities, 12 months or more | security		4
Investment securities held to maturity
Unrealized losses on held to maturity securities, less than 12 months	$ 0	$ (6)
Unrealized losses on held to maturity securities, 12 months or more	0	(9)
Total unrealized losses on held to maturity securities	0	(15)
Fair value of unrealized losses on held to maturity securities, less than 12 months	0	1,242
Fair value of unrealized losses on held to maturity securities, 12 months or more	0	833
Total fair value of unrealized losses on held to maturity securities	$ 0	$ 2,075
FNMA/FHLMC | Residential Related Securities | Held to maturity, number of securities, less than 12 months
Investment securities held to maturity
Number of held to maturity securities in a continuous unrealized loss position | security	1	1
FNMA/FHLMC | Residential Related Securities | Held to maturity, number of securities, 12 months or more
Investment securities held to maturity
Number of held to maturity securities in a continuous unrealized loss position | security	0	1
GNMA | Residential Related Securities
Investment securities available for sale
Unrealized losses on available for sale securities, less than 12 months		$ (924)
Unrealized losses on available for sale securities, 12 months or more		(766)
Total unrealized losses on available for sale securities		(1,689)
Fair value of unrealized losses on available for sale securities, less than 12 months		322,394
Fair value of unrealized losses on available for sale securities, 12 months or more		79,461
Total fair value of unrealized losses on available for sale securities		$ 401,856
Available-for-sale, Number of Securities
Available for sale, number of securities, less than 12 months | security		18
Available for sale, number of securities, 12 months or more | security		3
Investment securities held to maturity
Unrealized losses on held to maturity securities, less than 12 months		$ (1,059)
Unrealized losses on held to maturity securities, 12 months or more		(49)
Total unrealized losses on held to maturity securities		(1,108)
Fair value of unrealized losses on held to maturity securities, less than 12 months		187,261
Fair value of unrealized losses on held to maturity securities, 12 months or more		6,587
Total fair value of unrealized losses on held to maturity securities		$ 193,849
GNMA | Residential Related Securities | Held to maturity, number of securities, less than 12 months
Investment securities held to maturity
Number of held to maturity securities in a continuous unrealized loss position | security		12
GNMA | Residential Related Securities | Held to maturity, number of securities, 12 months or more
Investment securities held to maturity
Number of held to maturity securities in a continuous unrealized loss position | security		8
GNMA | Commercial mortgage-related securities
Investment securities available for sale
Unrealized losses on available for sale securities, less than 12 months	$ (1,111)	$ (810)
Unrealized losses on available for sale securities, 12 months or more	(2,944)	(11,222)
Total unrealized losses on available for sale securities	(4,055)	(12,032)
Fair value of unrealized losses on available for sale securities, less than 12 months	259,273	258,218
Fair value of unrealized losses on available for sale securities, 12 months or more	138,611	621,307
Total fair value of unrealized losses on available for sale securities	$ 397,883	$ 879,524
Available-for-sale, Number of Securities
Available for sale, number of securities, less than 12 months | security	22	22
Available for sale, number of securities, 12 months or more | security	8	42
Investment securities held to maturity
Unrealized losses on held to maturity securities, less than 12 months	$ (332)	$ (29)
Unrealized losses on held to maturity securities, 12 months or more	(1,607)	(6,093)
Total unrealized losses on held to maturity securities	(1,939)	(6,122)
Fair value of unrealized losses on held to maturity securities, less than 12 months	126,170	26,202
Fair value of unrealized losses on held to maturity securities, 12 months or more	126,624	357,733
Total fair value of unrealized losses on held to maturity securities	$ 252,794	$ 383,935
GNMA | Commercial mortgage-related securities | Held to maturity, number of securities, less than 12 months
Investment securities held to maturity
Number of held to maturity securities in a continuous unrealized loss position | security	8	2
GNMA | Commercial mortgage-related securities | Held to maturity, number of securities, 12 months or more
Investment securities held to maturity
Number of held to maturity securities in a continuous unrealized loss position | security	7	21

Investment Securities (Details

Investment Securities (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jan. 01, 2020	Dec. 31, 2019
Investment Securities Information [Line Items]
Debt Securities, AFS, Principal Sold	$ 281,000
Debt Securities, Realized Gain (Loss)	6,118		$ 1,680
Carrying amount of Securities Sold			$ 131,000
Pledged Financial Instruments, Not Separately Reported, Securities	2,100,000				$ 2,600,000
Interest Receivable	92,377				91,196
Debt Securities, Held-to-maturity, Nonaccrual, Interest Income	0
Debt Securities, Held-to-maturity, Past Due	0
Held to maturity allowance for credit loss	61			$ 61
Federal Home Loan Bank Stock	145,000				149,000
Federal Reserve Bank Stock	78,000				78,000
Equity securities with readily determinable fair values, Fair Value	$ 2,000				2,000
Visa Restricted Stock Owned. Total	77,996
Visa Restricted Stock Owned at Fair Value	77,000
Visa Restricted Stock Donated		42,039
Visa Restricted Stock Owned at Zero Cost	996
Equity securities	$ 13,000				$ 13,000
First Staunton Bancshares [Member]
Investment Securities Information [Line Items]
Carrying amount of Securities Sold	84,000
Held-to-maturity Securities [Member]
Investment Securities Information [Line Items]
Interest Receivable	14,000
Available-for-sale Securities [Member]
Investment Securities Information [Line Items]
Interest Receivable	$ 10,000

Loans Composition (Details)

Loans Composition (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Loans and Leases Receivable Disclosure [Line Items]
Total loans(a)	$ 24,365,633	$ 22,821,440
Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Total loans(a)	8,517,974	7,354,594
Commercial real estate — owner occupied
Loans and Leases Receivable Disclosure [Line Items]
Total loans(a)	940,687	911,265
Commercial and business lending
Loans and Leases Receivable Disclosure [Line Items]
Total loans(a)	9,458,661	8,265,858
Commercial real estate — investor
Loans and Leases Receivable Disclosure [Line Items]
Total loans(a)	4,038,036	3,794,517
Real estate construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans(a)	1,544,858	1,420,900
Commercial real estate lending
Loans and Leases Receivable Disclosure [Line Items]
Total loans(a)	5,582,894	5,215,417
Total commercial
Loans and Leases Receivable Disclosure [Line Items]
Total loans(a)	15,041,555	13,481,275
Residential mortgage
Loans and Leases Receivable Disclosure [Line Items]
Total loans(a)	8,132,417	8,136,980
Carrying Amount Of Loans Sold	200,000
Home equity
Loans and Leases Receivable Disclosure [Line Items]
Total loans(a)	844,901	852,025
Other consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans(a)	346,761	351,159
Total consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans(a)	$ 9,324,079	$ 9,340,164

Loans, Credit Quality Indicator

Loans, Credit Quality Indicator by Vintage Year (Details) $ in Thousands	Mar. 31, 2020USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	$ 24,365,633
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	3,644,110
Financing Receivable, Originated Four Years before Latest Fiscal Year	2,391,098
Financing Receivable, Originated Three Years before Latest Fiscal Year	3,056,543
Financing Receivable, Originated Two Years before Latest Fiscal Year	4,139,743
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	6,073,368
Financing Receivable, Originated in Current Fiscal Year	1,682,992
Financing Receivable, Revolving	3,377,780
Financing Receivable, Revolving, Converted To Term Loan	8,145
Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	220,093
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	7,927
Financing Receivable, Originated Four Years before Latest Fiscal Year	39,741
Financing Receivable, Originated Three Years before Latest Fiscal Year	16,710
Financing Receivable, Originated Two Years before Latest Fiscal Year	53,857
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	67,642
Financing Receivable, Originated in Current Fiscal Year	5,635
Financing Receivable, Revolving	28,581
Financing Receivable, Revolving, Converted To Term Loan	106
Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	23,774,932
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	3,557,616
Financing Receivable, Originated Four Years before Latest Fiscal Year	2,288,760
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,955,768
Financing Receivable, Originated Two Years before Latest Fiscal Year	4,053,928
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	5,959,806
Financing Receivable, Originated in Current Fiscal Year	1,675,554
Financing Receivable, Revolving	3,283,501
Financing Receivable, Revolving, Converted To Term Loan	7,125
Potential Problem
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	233,892
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	18,729
Financing Receivable, Originated Four Years before Latest Fiscal Year	32,207
Financing Receivable, Originated Three Years before Latest Fiscal Year	58,210
Financing Receivable, Originated Two Years before Latest Fiscal Year	25,615
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	34,660
Financing Receivable, Originated in Current Fiscal Year	255
Financing Receivable, Revolving	64,216
Financing Receivable, Revolving, Converted To Term Loan	685
Nonaccrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	136,717
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	59,838
Financing Receivable, Originated Four Years before Latest Fiscal Year	30,390
Financing Receivable, Originated Three Years before Latest Fiscal Year	25,856
Financing Receivable, Originated Two Years before Latest Fiscal Year	6,343
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	11,260
Financing Receivable, Originated in Current Fiscal Year	1,549
Financing Receivable, Revolving	1,482
Financing Receivable, Revolving, Converted To Term Loan	229
Oil and Gas Portfolio Segment [Member] | Potential Problem
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	67,000
Oil and Gas Portfolio Segment [Member] | Nonaccrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	29,000
Total commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	15,041,555
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,161,333
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,051,317
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,565,762
Financing Receivable, Originated Two Years before Latest Fiscal Year	3,251,035
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	4,235,777
Financing Receivable, Originated in Current Fiscal Year	1,326,976
Financing Receivable, Revolving	2,449,354
Financing Receivable, Revolving, Converted To Term Loan	1,462
Total commercial | Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	216,843
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	7,013
Financing Receivable, Originated Four Years before Latest Fiscal Year	39,530
Financing Receivable, Originated Three Years before Latest Fiscal Year	16,638
Financing Receivable, Originated Two Years before Latest Fiscal Year	53,729
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	67,603
Financing Receivable, Originated in Current Fiscal Year	5,570
Financing Receivable, Revolving	26,760
Financing Receivable, Revolving, Converted To Term Loan	0
Total commercial | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	14,534,111
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,117,872
Financing Receivable, Originated Four Years before Latest Fiscal Year	962,480
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,475,393
Financing Receivable, Originated Two Years before Latest Fiscal Year	3,171,136
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	4,126,902
Financing Receivable, Originated in Current Fiscal Year	1,320,350
Financing Receivable, Revolving	2,359,976
Financing Receivable, Revolving, Converted To Term Loan	777
Total commercial | Potential Problem
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	228,333
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	17,309
Financing Receivable, Originated Four Years before Latest Fiscal Year	31,775
Financing Receivable, Originated Three Years before Latest Fiscal Year	57,217
Financing Receivable, Originated Two Years before Latest Fiscal Year	25,532
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	34,073
Financing Receivable, Originated in Current Fiscal Year	255
Financing Receivable, Revolving	62,171
Financing Receivable, Revolving, Converted To Term Loan	685
Total commercial | Nonaccrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	62,269
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	19,138
Financing Receivable, Originated Four Years before Latest Fiscal Year	17,532
Financing Receivable, Originated Three Years before Latest Fiscal Year	16,514
Financing Receivable, Originated Two Years before Latest Fiscal Year	637
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	7,200
Financing Receivable, Originated in Current Fiscal Year	801
Financing Receivable, Revolving	446
Financing Receivable, Revolving, Converted To Term Loan	0
Total commercial | Commercial And Industrial Financing Receivable [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	8,517,974
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	617,827
Financing Receivable, Originated Four Years before Latest Fiscal Year	426,869
Financing Receivable, Originated Three Years before Latest Fiscal Year	917,402
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,797,672
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,971,173
Financing Receivable, Originated in Current Fiscal Year	671,779
Financing Receivable, Revolving	2,115,253
Financing Receivable, Revolving, Converted To Term Loan	1,462
Total commercial | Commercial And Industrial Financing Receivable [Member] | Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	63,922
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	151
Financing Receivable, Originated Four Years before Latest Fiscal Year	7,287
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,260
Financing Receivable, Originated Two Years before Latest Fiscal Year	5,255
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	17,726
Financing Receivable, Originated in Current Fiscal Year	5,570
Financing Receivable, Revolving	26,674
Financing Receivable, Revolving, Converted To Term Loan	0
Total commercial | Commercial And Industrial Financing Receivable [Member] | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	8,245,450
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	598,104
Financing Receivable, Originated Four Years before Latest Fiscal Year	392,996
Financing Receivable, Originated Three Years before Latest Fiscal Year	846,057
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,770,838
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,943,817
Financing Receivable, Originated in Current Fiscal Year	665,843
Financing Receivable, Revolving	2,027,795
Financing Receivable, Revolving, Converted To Term Loan	777
Total commercial | Commercial And Industrial Financing Receivable [Member] | Potential Problem
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	149,747
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,401
Financing Receivable, Originated Four Years before Latest Fiscal Year	9,053
Financing Receivable, Originated Three Years before Latest Fiscal Year	53,915
Financing Receivable, Originated Two Years before Latest Fiscal Year	21,030
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,430
Financing Receivable, Originated in Current Fiscal Year	134
Financing Receivable, Revolving	60,784
Financing Receivable, Revolving, Converted To Term Loan	685
Total commercial | Commercial And Industrial Financing Receivable [Member] | Nonaccrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	58,854
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	17,171
Financing Receivable, Originated Four Years before Latest Fiscal Year	17,532
Financing Receivable, Originated Three Years before Latest Fiscal Year	16,171
Financing Receivable, Originated Two Years before Latest Fiscal Year	550
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	7,200
Financing Receivable, Originated in Current Fiscal Year	231
Financing Receivable, Revolving	0
Financing Receivable, Revolving, Converted To Term Loan	0
Total commercial | Commercial real estate — owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	940,687
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	159,043
Financing Receivable, Originated Four Years before Latest Fiscal Year	171,026
Financing Receivable, Originated Three Years before Latest Fiscal Year	135,576
Financing Receivable, Originated Two Years before Latest Fiscal Year	158,056
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	238,039
Financing Receivable, Originated in Current Fiscal Year	33,207
Financing Receivable, Revolving	45,739
Financing Receivable, Revolving, Converted To Term Loan	0
Total commercial | Commercial real estate — owner occupied | Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	37,789
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	5,321
Financing Receivable, Originated Four Years before Latest Fiscal Year	662
Financing Receivable, Originated Three Years before Latest Fiscal Year	139
Financing Receivable, Originated Two Years before Latest Fiscal Year	15,143
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	16,438
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Revolving	86
Financing Receivable, Revolving, Converted To Term Loan	0
Total commercial | Commercial real estate — owner occupied | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	885,257
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	150,188
Financing Receivable, Originated Four Years before Latest Fiscal Year	160,435
Financing Receivable, Originated Three Years before Latest Fiscal Year	133,631
Financing Receivable, Originated Two Years before Latest Fiscal Year	141,652
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	220,821
Financing Receivable, Originated in Current Fiscal Year	33,107
Financing Receivable, Revolving	45,423
Financing Receivable, Revolving, Converted To Term Loan	0
Total commercial | Commercial real estate — owner occupied | Potential Problem
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	15,802
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,126
Financing Receivable, Originated Four Years before Latest Fiscal Year	9,930
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,463
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,173
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	780
Financing Receivable, Originated in Current Fiscal Year	100
Financing Receivable, Revolving	230
Financing Receivable, Revolving, Converted To Term Loan	0
Total commercial | Commercial real estate — owner occupied | Nonaccrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	1,838
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,407
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	343
Financing Receivable, Originated Two Years before Latest Fiscal Year	88
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, Revolving, Converted To Term Loan	0
Total commercial | Commercial and business lending
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	9,458,661
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	776,869
Financing Receivable, Originated Four Years before Latest Fiscal Year	597,895
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,052,978
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,955,729
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,209,212
Financing Receivable, Originated in Current Fiscal Year	704,986
Financing Receivable, Revolving	2,160,992
Financing Receivable, Revolving, Converted To Term Loan	1,462
Total commercial | Commercial and business lending | Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	101,711
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	5,472
Financing Receivable, Originated Four Years before Latest Fiscal Year	7,949
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,399
Financing Receivable, Originated Two Years before Latest Fiscal Year	20,398
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	34,163
Financing Receivable, Originated in Current Fiscal Year	5,570
Financing Receivable, Revolving	26,760
Financing Receivable, Revolving, Converted To Term Loan	0
Total commercial | Commercial and business lending | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	9,130,708
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	748,292
Financing Receivable, Originated Four Years before Latest Fiscal Year	553,431
Financing Receivable, Originated Three Years before Latest Fiscal Year	979,688
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,912,490
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,164,638
Financing Receivable, Originated in Current Fiscal Year	698,951
Financing Receivable, Revolving	2,073,218
Financing Receivable, Revolving, Converted To Term Loan	777
Total commercial | Commercial and business lending | Potential Problem
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	165,550
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	4,527
Financing Receivable, Originated Four Years before Latest Fiscal Year	18,983
Financing Receivable, Originated Three Years before Latest Fiscal Year	55,378
Financing Receivable, Originated Two Years before Latest Fiscal Year	22,204
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,211
Financing Receivable, Originated in Current Fiscal Year	234
Financing Receivable, Revolving	61,014
Financing Receivable, Revolving, Converted To Term Loan	685
Total commercial | Commercial and business lending | Nonaccrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	60,692
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	18,578
Financing Receivable, Originated Four Years before Latest Fiscal Year	17,532
Financing Receivable, Originated Three Years before Latest Fiscal Year	16,514
Financing Receivable, Originated Two Years before Latest Fiscal Year	637
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	7,200
Financing Receivable, Originated in Current Fiscal Year	231
Financing Receivable, Revolving	0
Financing Receivable, Revolving, Converted To Term Loan	0
Total commercial | Commercial real estate — investor
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	4,038,036
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	358,524
Financing Receivable, Originated Four Years before Latest Fiscal Year	450,091
Financing Receivable, Originated Three Years before Latest Fiscal Year	364,261
Financing Receivable, Originated Two Years before Latest Fiscal Year	839,004
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,317,691
Financing Receivable, Originated in Current Fiscal Year	500,221
Financing Receivable, Revolving	208,244
Financing Receivable, Revolving, Converted To Term Loan	0
Total commercial | Commercial real estate — investor | Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	96,913
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,525
Financing Receivable, Originated Four Years before Latest Fiscal Year	31,581
Financing Receivable, Originated Three Years before Latest Fiscal Year	15,239
Financing Receivable, Originated Two Years before Latest Fiscal Year	15,128
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	33,440
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, Revolving, Converted To Term Loan	0
Total commercial | Commercial real estate — investor | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	3,879,003
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	344,191
Financing Receivable, Originated Four Years before Latest Fiscal Year	405,718
Financing Receivable, Originated Three Years before Latest Fiscal Year	348,738
Financing Receivable, Originated Two Years before Latest Fiscal Year	820,547
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,253,538
Financing Receivable, Originated in Current Fiscal Year	499,631
Financing Receivable, Revolving	206,640
Financing Receivable, Revolving, Converted To Term Loan	0
Total commercial | Commercial real estate — investor | Potential Problem
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	61,030
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	12,734
Financing Receivable, Originated Four Years before Latest Fiscal Year	12,792
Financing Receivable, Originated Three Years before Latest Fiscal Year	283
Financing Receivable, Originated Two Years before Latest Fiscal Year	3,329
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	30,714
Financing Receivable, Originated in Current Fiscal Year	20
Financing Receivable, Revolving	1,157
Financing Receivable, Revolving, Converted To Term Loan	0
Total commercial | Commercial real estate — investor | Nonaccrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	1,091
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	75
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated in Current Fiscal Year	570
Financing Receivable, Revolving	446
Financing Receivable, Revolving, Converted To Term Loan	0
Total commercial | Real Estate Construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	1,544,858
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	25,939
Financing Receivable, Originated Four Years before Latest Fiscal Year	3,331
Financing Receivable, Originated Three Years before Latest Fiscal Year	148,523
Financing Receivable, Originated Two Years before Latest Fiscal Year	456,303
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	708,875
Financing Receivable, Originated in Current Fiscal Year	121,768
Financing Receivable, Revolving	80,118
Financing Receivable, Revolving, Converted To Term Loan	0
Total commercial | Real Estate Construction | Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	18,219
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	16
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	18,203
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, Revolving, Converted To Term Loan	0
Total commercial | Real Estate Construction | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	1,524,400
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	25,389
Financing Receivable, Originated Four Years before Latest Fiscal Year	3,331
Financing Receivable, Originated Three Years before Latest Fiscal Year	146,967
Financing Receivable, Originated Two Years before Latest Fiscal Year	438,100
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	708,726
Financing Receivable, Originated in Current Fiscal Year	121,768
Financing Receivable, Revolving	80,118
Financing Receivable, Revolving, Converted To Term Loan	0
Total commercial | Real Estate Construction | Potential Problem
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	1,753
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	48
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,557
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	148
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, Revolving, Converted To Term Loan	0
Total commercial | Real Estate Construction | Nonaccrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	486
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	486
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, Revolving, Converted To Term Loan	0
Total commercial | Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	5,582,894
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	384,463
Financing Receivable, Originated Four Years before Latest Fiscal Year	453,422
Financing Receivable, Originated Three Years before Latest Fiscal Year	512,784
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,295,307
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,026,565
Financing Receivable, Originated in Current Fiscal Year	621,990
Financing Receivable, Revolving	288,362
Financing Receivable, Revolving, Converted To Term Loan	0
Total commercial | Commercial Real Estate | Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	115,132
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,540
Financing Receivable, Originated Four Years before Latest Fiscal Year	31,581
Financing Receivable, Originated Three Years before Latest Fiscal Year	15,239
Financing Receivable, Originated Two Years before Latest Fiscal Year	33,331
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	33,440
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, Revolving, Converted To Term Loan	0
Total commercial | Commercial Real Estate | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	5,403,403
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	369,580
Financing Receivable, Originated Four Years before Latest Fiscal Year	409,049
Financing Receivable, Originated Three Years before Latest Fiscal Year	495,705
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,258,647
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,962,264
Financing Receivable, Originated in Current Fiscal Year	621,399
Financing Receivable, Revolving	286,759
Financing Receivable, Revolving, Converted To Term Loan	0
Total commercial | Commercial Real Estate | Potential Problem
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	62,783
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	12,782
Financing Receivable, Originated Four Years before Latest Fiscal Year	12,792
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,840
Financing Receivable, Originated Two Years before Latest Fiscal Year	3,329
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	30,862
Financing Receivable, Originated in Current Fiscal Year	20
Financing Receivable, Revolving	1,157
Financing Receivable, Revolving, Converted To Term Loan	0
Total commercial | Commercial Real Estate | Nonaccrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	1,577
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	560
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated in Current Fiscal Year	570
Financing Receivable, Revolving	446
Financing Receivable, Revolving, Converted To Term Loan	0
Total consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	9,324,079
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,482,777
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,339,780
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,490,781
Financing Receivable, Originated Two Years before Latest Fiscal Year	888,708
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,837,590
Financing Receivable, Originated in Current Fiscal Year	356,017
Financing Receivable, Revolving	928,426
Financing Receivable, Revolving, Converted To Term Loan	6,683
Total consumer | Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	3,251
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	914
Financing Receivable, Originated Four Years before Latest Fiscal Year	212
Financing Receivable, Originated Three Years before Latest Fiscal Year	71
Financing Receivable, Originated Two Years before Latest Fiscal Year	128
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	40
Financing Receivable, Originated in Current Fiscal Year	65
Financing Receivable, Revolving	1,821
Financing Receivable, Revolving, Converted To Term Loan	106
Total consumer | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	9,240,821
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,439,744
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,326,279
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,480,375
Financing Receivable, Originated Two Years before Latest Fiscal Year	882,791
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,832,904
Financing Receivable, Originated in Current Fiscal Year	355,204
Financing Receivable, Revolving	923,525
Financing Receivable, Revolving, Converted To Term Loan	6,348
Total consumer | Potential Problem
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	5,559
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,420
Financing Receivable, Originated Four Years before Latest Fiscal Year	432
Financing Receivable, Originated Three Years before Latest Fiscal Year	992
Financing Receivable, Originated Two Years before Latest Fiscal Year	83
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	587
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Revolving	2,045
Financing Receivable, Revolving, Converted To Term Loan	0
Total consumer | Nonaccrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	74,448
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	40,700
Financing Receivable, Originated Four Years before Latest Fiscal Year	12,857
Financing Receivable, Originated Three Years before Latest Fiscal Year	9,342
Financing Receivable, Originated Two Years before Latest Fiscal Year	5,706
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	4,060
Financing Receivable, Originated in Current Fiscal Year	748
Financing Receivable, Revolving	1,036
Financing Receivable, Revolving, Converted To Term Loan	229
Total consumer | Residential mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	8,132,417
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,261,335
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,334,308
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,484,752
Financing Receivable, Originated Two Years before Latest Fiscal Year	879,575
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,819,630
Financing Receivable, Originated in Current Fiscal Year	352,726
Financing Receivable, Revolving	92
Financing Receivable, Revolving, Converted To Term Loan	0
Total consumer | Residential mortgage | Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	667
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	572
Financing Receivable, Originated Four Years before Latest Fiscal Year	36
Financing Receivable, Originated Three Years before Latest Fiscal Year	22
Financing Receivable, Originated Two Years before Latest Fiscal Year	37
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, Revolving, Converted To Term Loan	0
Total consumer | Residential mortgage | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	8,063,574
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,226,104
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,321,163
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,474,788
Financing Receivable, Originated Two Years before Latest Fiscal Year	874,080
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,815,240
Financing Receivable, Originated in Current Fiscal Year	352,107
Financing Receivable, Revolving	92
Financing Receivable, Revolving, Converted To Term Loan	0
Total consumer | Residential mortgage | Potential Problem
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	3,322
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,274
Financing Receivable, Originated Four Years before Latest Fiscal Year	432
Financing Receivable, Originated Three Years before Latest Fiscal Year	992
Financing Receivable, Originated Two Years before Latest Fiscal Year	36
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	587
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, Revolving, Converted To Term Loan	0
Total consumer | Residential mortgage | Nonaccrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	64,855
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	33,385
Financing Receivable, Originated Four Years before Latest Fiscal Year	12,678
Financing Receivable, Originated Three Years before Latest Fiscal Year	8,949
Financing Receivable, Originated Two Years before Latest Fiscal Year	5,422
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,802
Financing Receivable, Originated in Current Fiscal Year	619
Financing Receivable, Revolving	0
Financing Receivable, Revolving, Converted To Term Loan	0
Total consumer | Home Equity Loan
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	844,901
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	91,314
Financing Receivable, Originated Four Years before Latest Fiscal Year	3,025
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,807
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,290
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,888
Financing Receivable, Originated in Current Fiscal Year	417
Financing Receivable, Revolving	743,161
Financing Receivable, Revolving, Converted To Term Loan	6,609
Total consumer | Home Equity Loan | Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	1,942
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	338
Financing Receivable, Originated Four Years before Latest Fiscal Year	97
Financing Receivable, Originated Three Years before Latest Fiscal Year	50
Financing Receivable, Originated Two Years before Latest Fiscal Year	91
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	39
Financing Receivable, Originated in Current Fiscal Year	65
Financing Receivable, Revolving	1,262
Financing Receivable, Revolving, Converted To Term Loan	102
Total consumer | Home Equity Loan | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	831,344
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	83,567
Financing Receivable, Originated Four Years before Latest Fiscal Year	2,748
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,374
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,869
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,626
Financing Receivable, Originated in Current Fiscal Year	223
Financing Receivable, Revolving	738,938
Financing Receivable, Revolving, Converted To Term Loan	6,286
Total consumer | Home Equity Loan | Potential Problem
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	2,238
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	146
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	46
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Revolving	2,045
Financing Receivable, Revolving, Converted To Term Loan	0
Total consumer | Home Equity Loan | Nonaccrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	9,378
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	7,263
Financing Receivable, Originated Four Years before Latest Fiscal Year	180
Financing Receivable, Originated Three Years before Latest Fiscal Year	383
Financing Receivable, Originated Two Years before Latest Fiscal Year	284
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	224
Financing Receivable, Originated in Current Fiscal Year	128
Financing Receivable, Revolving	916
Financing Receivable, Revolving, Converted To Term Loan	221
Total consumer | Other consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	346,761
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	130,129
Financing Receivable, Originated Four Years before Latest Fiscal Year	2,447
Financing Receivable, Originated Three Years before Latest Fiscal Year	3,223
Financing Receivable, Originated Two Years before Latest Fiscal Year	6,843
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	16,072
Financing Receivable, Originated in Current Fiscal Year	2,874
Financing Receivable, Revolving	185,173
Financing Receivable, Revolving, Converted To Term Loan	75
Total consumer | Other consumer | Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	642
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	4
Financing Receivable, Originated Four Years before Latest Fiscal Year	78
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Revolving	559
Financing Receivable, Revolving, Converted To Term Loan	4
Total consumer | Other consumer | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	345,904
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	130,073
Financing Receivable, Originated Four Years before Latest Fiscal Year	2,369
Financing Receivable, Originated Three Years before Latest Fiscal Year	3,213
Financing Receivable, Originated Two Years before Latest Fiscal Year	6,843
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	16,037
Financing Receivable, Originated in Current Fiscal Year	2,874
Financing Receivable, Revolving	184,495
Financing Receivable, Revolving, Converted To Term Loan	62
Total consumer | Other consumer | Potential Problem
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, Revolving, Converted To Term Loan	0
Total consumer | Other consumer | Nonaccrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	215
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	52
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	10
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	34
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Revolving	119
Financing Receivable, Revolving, Converted To Term Loan	$ 8

Loans Credit Quality Indicator

Loans Credit Quality Indicator (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	$ 24,365,633	$ 22,821,440
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		22,294,939
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		247,022
Potential Problem
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		161,097
Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		118,380
Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	8,517,974	7,354,594
Commercial and industrial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		7,118,448
Commercial and industrial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		79,525
Commercial and industrial | Potential Problem
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		110,308
Commercial and industrial | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		46,312
Commercial real estate — owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	940,687	911,265
Commercial real estate — owner occupied | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		866,193
Commercial real estate — owner occupied | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		25,115
Commercial real estate — owner occupied | Potential Problem
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		19,889
Commercial real estate — owner occupied | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		67
Commercial and business lending
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	9,458,661	8,265,858
Commercial and business lending | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		7,984,641
Commercial and business lending | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		104,641
Commercial and business lending | Potential Problem
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		130,197
Commercial and business lending | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		46,380
Commercial real estate — investor
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	4,038,036	3,794,517
Commercial real estate — investor | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		3,620,785
Commercial real estate — investor | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		139,873
Commercial real estate — investor | Potential Problem
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		29,449
Commercial real estate — investor | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		4,409
Real estate construction
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	1,544,858	1,420,900
Real estate construction | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		1,420,374
Real estate construction | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		33
Real estate construction | Potential Problem
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		0
Real estate construction | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		493
Commercial real estate lending
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	5,582,894	5,215,417
Commercial real estate lending | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		5,041,159
Commercial real estate lending | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		139,906
Commercial real estate lending | Potential Problem
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		29,449
Commercial real estate lending | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		4,902
Total commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	15,041,555	13,481,275
Total commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		13,025,800
Total commercial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		244,547
Total commercial | Potential Problem
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		159,646
Total commercial | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		51,282
Residential mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	8,132,417	8,136,980
Residential mortgage | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		8,077,122
Residential mortgage | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		563
Residential mortgage | Potential Problem
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		1,451
Residential mortgage | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		57,844
Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	844,901	852,025
Home equity | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		841,757
Home equity | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		1,164
Home equity | Potential Problem
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		0
Home equity | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		9,104
Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	346,761	351,159
Other consumer | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		350,260
Other consumer | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		748
Other consumer | Potential Problem
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		0
Other consumer | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		152
Total consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	$ 9,324,079	9,340,164
Total consumer | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		9,269,139
Total consumer | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		2,475
Total consumer | Potential Problem
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		1,451
Total consumer | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		$ 67,099

Loans Past Due Status (Details)

Loans Past Due Status (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Summarized details of Loans
Current	$ 24,192,115	$ 22,679,696
Nonaccrual(a)(b)	136,717	118,380
Loans and Leases Receivable, Net of Deferred Income, Total	24,365,633	22,821,440
Nonaccrual Loans, Current Portion	$ 75,000	$ 48,000
Percent of current nonaccrual loans	55.00%	41.00%
Financing Receivable, Nonaccrual, Interest Income	$ 0
Financing Receivable, Nonaccrual, No Allowance	44,000
30-59 Days Past Due
Summarized details of Loans
Total Past Due	31,731	$ 18,188
60-89 Days Past Due
Summarized details of Loans
Total Past Due	2,816	2,916
90 Days or More Past Due
Summarized details of Loans
Total Past Due	2,255	2,259
Commercial and industrial
Summarized details of Loans
Current	8,457,708	7,307,118
Nonaccrual(a)(b)	58,854	46,312
Loans and Leases Receivable, Net of Deferred Income, Total	8,517,974	7,354,594
Commercial and industrial | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	508	576
Commercial and industrial | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	468	245
Commercial and industrial | 90 Days or More Past Due
Summarized details of Loans
Total Past Due	436	342
Commercial real estate — owner occupied
Summarized details of Loans
Current	938,798	909,828
Nonaccrual(a)(b)	1,838	67
Loans and Leases Receivable, Net of Deferred Income, Total	940,687	911,265
Commercial real estate — owner occupied | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	51	1,369
Commercial real estate — owner occupied | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	0	0
Commercial real estate — owner occupied | 90 Days or More Past Due
Summarized details of Loans
Total Past Due	0	0
Commercial and business lending
Summarized details of Loans
Current	9,396,506	8,216,947
Nonaccrual(a)(b)	60,692	46,380
Loans and Leases Receivable, Net of Deferred Income, Total	9,458,661	8,265,858
Commercial and business lending | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	558	1,945
Commercial and business lending | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	468	245
Commercial and business lending | 90 Days or More Past Due
Summarized details of Loans
Total Past Due	436	342
Commercial real estate — investor
Summarized details of Loans
Current	4,022,482	3,788,296
Nonaccrual(a)(b)	1,091	4,409
Loans and Leases Receivable, Net of Deferred Income, Total	4,038,036	3,794,517
Commercial real estate — investor | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	14,462	1,812
Commercial real estate — investor | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	0	0
Commercial real estate — investor | 90 Days or More Past Due
Summarized details of Loans
Total Past Due	0	0
Real estate construction
Summarized details of Loans
Current	1,544,194	1,420,310
Nonaccrual(a)(b)	486	493
Loans and Leases Receivable, Net of Deferred Income, Total	1,544,858	1,420,900
Real estate construction | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	179	64
Real estate construction | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	0	33
Real estate construction | 90 Days or More Past Due
Summarized details of Loans
Total Past Due	0	0
Commercial real estate lending
Summarized details of Loans
Current	5,566,676	5,208,606
Nonaccrual(a)(b)	1,577	4,902
Loans and Leases Receivable, Net of Deferred Income, Total	5,582,894	5,215,417
Commercial real estate lending | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	14,641	1,876
Commercial real estate lending | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	0	33
Commercial real estate lending | 90 Days or More Past Due
Summarized details of Loans
Total Past Due	0	0
Total commercial
Summarized details of Loans
Current	14,963,182	13,425,552
Nonaccrual(a)(b)	62,269	51,282
Loans and Leases Receivable, Net of Deferred Income, Total	15,041,555	13,481,275
Total commercial | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	15,200	3,821
Total commercial | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	468	278
Total commercial | 90 Days or More Past Due
Summarized details of Loans
Total Past Due	436	342
Residential mortgage
Summarized details of Loans
Current	8,057,461	8,069,863
Nonaccrual(a)(b)	64,855	57,844
Loans and Leases Receivable, Net of Deferred Income, Total	8,132,417	8,136,980
Residential mortgage | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	9,492	8,749
Residential mortgage | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	610	525
Residential mortgage | 90 Days or More Past Due
Summarized details of Loans
Total Past Due	0	0
Home equity
Summarized details of Loans
Current	828,523	837,274
Nonaccrual(a)(b)	9,378	9,104
Loans and Leases Receivable, Net of Deferred Income, Total	844,901	852,025
Home equity | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	6,012	4,483
Home equity | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	988	1,164
Home equity | 90 Days or More Past Due
Summarized details of Loans
Total Past Due	0	0
Other consumer
Summarized details of Loans
Current	342,950	347,007
Nonaccrual(a)(b)	215	152
Loans and Leases Receivable, Net of Deferred Income, Total	346,761	351,159
Other consumer | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	1,028	1,135
Other consumer | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	749	949
Other consumer | 90 Days or More Past Due
Summarized details of Loans
Total Past Due	1,819	1,917
Total consumer
Summarized details of Loans
Current	9,228,933	9,254,144
Nonaccrual(a)(b)	74,448	67,099
Loans and Leases Receivable, Net of Deferred Income, Total	9,324,079	9,340,164
Total consumer | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	16,531	14,366
Total consumer | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	2,348	2,638
Total consumer | 90 Days or More Past Due
Summarized details of Loans
Total Past Due	$ 1,819	$ 1,917

Loans, Impaired Loans Recorded

Loans, Impaired Loans Recorded Investment, Unpaid Principal Balance, Related Allowance, Average Recorded Investment, and Interest Income Recognized (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	$ 110,043
Unpaid Principal Balance	148,020
Related Allowance	16,165
Average Recorded Investment	113,697
Interest Income Recognized	$ 3,628
Net Recorded Investment of the Impaired Loans	63.00%
Bank Mutual
Loan and Lease Receivables, Impaired [Abstract]
Purchased credit-impaired loans	$ 2,000
Loans with a related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	76,102
Unpaid Principal Balance	95,033
Related Allowance	16,165
Average Recorded Investment	77,235
Interest Income Recognized	3,012
Loans with no related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	33,941
Unpaid Principal Balance	52,987
Related Allowance	0
Average Recorded Investment	36,462
Interest Income Recognized	616
Commercial and industrial
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	62,035
Unpaid Principal Balance	96,784
Related Allowance	12,010
Average Recorded Investment	65,792
Interest Income Recognized	1,895
Commercial and industrial | Loans with a related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	47,249
Unpaid Principal Balance	63,346
Related Allowance	12,010
Average Recorded Investment	45,290
Interest Income Recognized	1,832
Commercial and industrial | Loans with no related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	14,787
Unpaid Principal Balance	33,438
Related Allowance	0
Average Recorded Investment	20,502
Interest Income Recognized	63
Commercial real estate — owner occupied
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	1,676
Unpaid Principal Balance	1,682
Related Allowance	19
Average Recorded Investment	1,774
Interest Income Recognized	88
Commercial real estate — owner occupied | Loans with a related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	1,676
Unpaid Principal Balance	1,682
Related Allowance	19
Average Recorded Investment	1,774
Interest Income Recognized	88
Commercial real estate — owner occupied | Loans with no related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	0
Unpaid Principal Balance	0
Related Allowance	0
Average Recorded Investment	0
Interest Income Recognized	0
Commercial and business lending
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	63,711
Unpaid Principal Balance	98,466
Related Allowance	12,029
Average Recorded Investment	67,566
Interest Income Recognized	1,982
Commercial and business lending | Loans with a related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	48,924
Unpaid Principal Balance	65,028
Related Allowance	12,029
Average Recorded Investment	47,064
Interest Income Recognized	1,919
Commercial and business lending | Loans with no related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	14,787
Unpaid Principal Balance	33,438
Related Allowance	0
Average Recorded Investment	20,502
Interest Income Recognized	63
Commercial real estate — investor
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	4,633
Unpaid Principal Balance	5,808
Related Allowance	15
Average Recorded Investment	4,931
Interest Income Recognized	174
Commercial real estate — investor | Loans with a related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	928
Unpaid Principal Balance	2,104
Related Allowance	15
Average Recorded Investment	950
Interest Income Recognized	15
Commercial real estate — investor | Loans with no related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	3,705
Unpaid Principal Balance	3,705
Related Allowance	0
Average Recorded Investment	3,980
Interest Income Recognized	159
Real estate construction
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	477
Unpaid Principal Balance	559
Related Allowance	67
Average Recorded Investment	494
Interest Income Recognized	30
Real estate construction | Loans with a related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	477
Unpaid Principal Balance	559
Related Allowance	67
Average Recorded Investment	494
Interest Income Recognized	30
Real estate construction | Loans with no related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	0
Unpaid Principal Balance	0
Related Allowance	0
Average Recorded Investment	0
Interest Income Recognized	0
Commercial real estate lending
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	5,110
Unpaid Principal Balance	6,367
Related Allowance	82
Average Recorded Investment	5,425
Interest Income Recognized	204
Commercial real estate lending | Loans with a related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	1,405
Unpaid Principal Balance	2,663
Related Allowance	82
Average Recorded Investment	1,445
Interest Income Recognized	45
Commercial real estate lending | Loans with no related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	3,705
Unpaid Principal Balance	3,705
Related Allowance	0
Average Recorded Investment	3,980
Interest Income Recognized	159
Total commercial
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	68,820
Unpaid Principal Balance	104,833
Related Allowance	12,111
Average Recorded Investment	72,991
Interest Income Recognized	2,186
Total commercial | Loans with a related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	50,329
Unpaid Principal Balance	67,691
Related Allowance	12,111
Average Recorded Investment	48,509
Interest Income Recognized	1,965
Total commercial | Loans with no related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	18,491
Unpaid Principal Balance	37,142
Related Allowance	0
Average Recorded Investment	24,482
Interest Income Recognized	222
Residential mortgage
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	35,554
Unpaid Principal Balance	37,087
Related Allowance	2,740
Average Recorded Investment	34,683
Interest Income Recognized	1,229
Residential mortgage | Loans with a related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	21,450
Unpaid Principal Balance	22,625
Related Allowance	2,740
Average Recorded Investment	23,721
Interest Income Recognized	856
Residential mortgage | Loans with no related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	14,104
Unpaid Principal Balance	14,461
Related Allowance	0
Average Recorded Investment	10,962
Interest Income Recognized	373
Home equity
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	4,422
Unpaid Principal Balance	4,851
Related Allowance	1,190
Average Recorded Investment	4,773
Interest Income Recognized	211
Home equity | Loans with a related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	3,076
Unpaid Principal Balance	3,468
Related Allowance	1,190
Average Recorded Investment	3,756
Interest Income Recognized	191
Home equity | Loans with no related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	1,346
Unpaid Principal Balance	1,383
Related Allowance	0
Average Recorded Investment	1,017
Interest Income Recognized	21
Other consumer
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	1,247
Unpaid Principal Balance	1,249
Related Allowance	125
Average Recorded Investment	1,250
Interest Income Recognized	1
Other consumer | Loans with a related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	1,247
Unpaid Principal Balance	1,249
Related Allowance	125
Average Recorded Investment	1,250
Interest Income Recognized	1
Other consumer | Loans with no related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	0
Unpaid Principal Balance	0
Related Allowance	0
Average Recorded Investment	0
Interest Income Recognized	0
Total consumer
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	41,223
Unpaid Principal Balance	43,187
Related Allowance	4,055
Average Recorded Investment	40,706
Interest Income Recognized	1,441
Total consumer | Loans with a related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	25,773
Unpaid Principal Balance	27,342
Related Allowance	4,055
Average Recorded Investment	28,726
Interest Income Recognized	1,047
Total consumer | Loans with no related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	15,450
Unpaid Principal Balance	15,845
Related Allowance	0
Average Recorded Investment	11,979
Interest Income Recognized	$ 394

Loans, Troubled Debt Restructur

Loans, Troubled Debt Restructurings Performing and Nonaccrual (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans	$ 26,384	$ 26,041
Nonaccrual Restructured Loans(a)	24,204	22,494
Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans	16,056	16,678
Nonaccrual Restructured Loans(a)	6,909	7,376
Commercial real estate — owner occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans	2,091	1,676
Nonaccrual Restructured Loans(a)	0	0
Commercial real estate — investor
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans	281	293
Nonaccrual Restructured Loans(a)	570	0
Real estate construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans	339	298
Nonaccrual Restructured Loans(a)	176	179
Residential mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans	4,654	3,955
Nonaccrual Restructured Loans(a)	15,097	13,035
Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans	1,719	1,896
Nonaccrual Restructured Loans(a)	1,451	1,904
Other consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans	1,245	1,246
Nonaccrual Restructured Loans(a)	$ 1	$ 1

Loans, Loans Modified in a Trou

Loans, Loans Modified in a Troubled Debt Restructuring (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020USD ($)loan	Mar. 31, 2019USD ($)loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	30	40
Recorded Investment(a)	$ 4,899	$ 4,739
Unpaid Principal Balance(b)	$ 6,175	$ 4,776
Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	1	0
Recorded Investment(a)	$ 48	$ 0
Unpaid Principal Balance(b)	$ 48	$ 0
Commercial real estate — owner occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	1	1
Recorded Investment(a)	$ 290	$ 78
Unpaid Principal Balance(b)	$ 321	$ 78
Commercial real estate — investor
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	1	0
Recorded Investment(a)	$ 570	$ 0
Unpaid Principal Balance(b)	$ 1,740	$ 0
Real estate construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	1	0
Recorded Investment(a)	$ 122	$ 0
Unpaid Principal Balance(b)	$ 122	$ 0
Residential mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	18	25
Recorded Investment(a)	$ 3,592	$ 4,357
Unpaid Principal Balance(b)	$ 3,668	$ 4,374
Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	8	13
Recorded Investment(a)	$ 277	$ 293
Unpaid Principal Balance(b)	$ 277	$ 312
Other consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	1
Recorded Investment(a)	$ 0	$ 11
Unpaid Principal Balance(b)	$ 0	$ 11

Loans, Troubled Debt Restruct_2

Loans, Troubled Debt Restructurings Subsequent Default (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020USD ($)loan	Mar. 31, 2019USD ($)loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	5	12
Recorded Investment | $	$ 476	$ 790
Residential mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	3	5
Recorded Investment | $	$ 388	$ 613
Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	2	7
Recorded Investment | $	$ 88	$ 177

Loans, Changes in the Allowance

Loans, Changes in the Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Mar. 31, 2020		Mar. 31, 2019	Dec. 31, 2019	Mar. 31, 2020		Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 201,371
Balance at end of period				$ 201,371
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period	21,907
Provision for loan losses	15,500
Balance at end of period	56,276			21,907
Allowance for credit losses on loans
Provision for credit losses	53,001		$ 6,000
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	201,371		238,023	238,023
Charge offs				(74,313)
Recoveries				19,161
Net Charge offs				(55,152)
Provision for loan losses				18,500
Balance at end of period	337,793	[1]		201,371
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually evaluated							$ 16,165
Collectively evaluated							185,205
Total allowance for loan losses	201,371		238,023	201,371	$ 337,793	[1]	201,371
Loans [Abstract]
Individually evaluated							110,043
Collectively evaluated							22,709,845
Financing Receivable Acquired and Accounted under Modification of Impaired Loans							1,552
Loans and Leases Receivable, Net of Deferred Income, Total					24,365,633		22,821,440
First Staunton Bancshares [Member]
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Provision for loan losses	179
Commercial and industrial
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	91,133		108,835	108,835
Charge offs				(63,315)
Recoveries				11,875
Net Charge offs				(51,441)
Provision for loan losses				33,738
Balance at end of period				91,133
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually evaluated							12,010
Collectively evaluated							79,123
Total allowance for loan losses	91,133		108,835	91,133			91,133
Loans [Abstract]
Individually evaluated							62,035
Collectively evaluated							7,292,217
Financing Receivable Acquired and Accounted under Modification of Impaired Loans							342
Loans and Leases Receivable, Net of Deferred Income, Total					8,517,974		7,354,594
Commercial real estate — owner occupied
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	10,284		9,255	9,255
Charge offs				(222)
Recoveries				2,795
Net Charge offs				2,573
Provision for loan losses				(1,543)
Balance at end of period				10,284
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually evaluated							19
Collectively evaluated							10,265
Total allowance for loan losses	10,284		9,255	10,284			10,284
Loans [Abstract]
Individually evaluated							1,676
Collectively evaluated							909,010
Financing Receivable Acquired and Accounted under Modification of Impaired Loans							579
Loans and Leases Receivable, Net of Deferred Income, Total					940,687		911,265
Commercial and business lending
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	101,417		118,090	118,090
Charge offs				(63,537)
Recoveries				14,670
Net Charge offs				(48,868)
Provision for loan losses				32,195
Balance at end of period				101,417
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually evaluated							12,029
Collectively evaluated							89,388
Total allowance for loan losses	101,417		118,090	101,417			101,417
Loans [Abstract]
Individually evaluated							63,711
Collectively evaluated							8,201,227
Financing Receivable Acquired and Accounted under Modification of Impaired Loans							921
Loans and Leases Receivable, Net of Deferred Income, Total					9,458,661		8,265,858
Commercial real estate — investor
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	40,514		40,844	40,844
Charge offs				0
Recoveries				31
Net Charge offs				31
Provision for loan losses				(361)
Balance at end of period				40,514
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually evaluated							15
Collectively evaluated							40,498
Total allowance for loan losses	40,514		40,844	40,514			40,514
Loans [Abstract]
Individually evaluated							4,633
Collectively evaluated							3,789,755
Financing Receivable Acquired and Accounted under Modification of Impaired Loans							129
Loans and Leases Receivable, Net of Deferred Income, Total					4,038,036		3,794,517
Real estate construction
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	24,915		28,240	28,240
Charge offs				(60)
Recoveries				302
Net Charge offs				243
Provision for loan losses				(3,568)
Balance at end of period				24,915
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually evaluated							67
Collectively evaluated							24,848
Total allowance for loan losses	24,915		28,240	24,915			24,915
Loans [Abstract]
Individually evaluated							477
Collectively evaluated							1,420,416
Financing Receivable Acquired and Accounted under Modification of Impaired Loans							7
Loans and Leases Receivable, Net of Deferred Income, Total					1,544,858		1,420,900
Commercial real estate lending
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	65,429		69,084	69,084
Charge offs				(60)
Recoveries				333
Net Charge offs				274
Provision for loan losses				(3,929)
Balance at end of period				65,429
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually evaluated							82
Collectively evaluated							65,346
Total allowance for loan losses	65,429		69,084	65,429			65,429
Loans [Abstract]
Individually evaluated							5,110
Collectively evaluated							5,210,171
Financing Receivable Acquired and Accounted under Modification of Impaired Loans							136
Loans and Leases Receivable, Net of Deferred Income, Total					5,582,894		5,215,417
Total commercial
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	166,846		187,174	187,174
Charge offs				(63,597)
Recoveries				15,003
Net Charge offs				(48,594)
Provision for loan losses				28,266
Balance at end of period				166,846
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually evaluated							12,111
Collectively evaluated							154,734
Total allowance for loan losses	166,846		187,174	166,846			166,846
Loans [Abstract]
Individually evaluated							68,821
Collectively evaluated							13,411,398
Financing Receivable Acquired and Accounted under Modification of Impaired Loans							1,057
Loans and Leases Receivable, Net of Deferred Income, Total					15,041,555		13,481,275
Residential mortgage
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	16,960		25,595	25,595
Charge offs				(3,322)
Recoveries				692
Net Charge offs				(2,630)
Provision for loan losses				(6,005)
Balance at end of period				16,960
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually evaluated							2,740
Collectively evaluated							14,220
Total allowance for loan losses	16,960		25,595	16,960			16,960
Loans [Abstract]
Individually evaluated							35,554
Collectively evaluated							8,100,958
Financing Receivable Acquired and Accounted under Modification of Impaired Loans							469
Loans and Leases Receivable, Net of Deferred Income, Total							8,136,980
Home equity
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	10,926		19,266	19,266
Charge offs				(1,846)
Recoveries				2,599
Net Charge offs				753
Provision for loan losses				(9,093)
Balance at end of period				10,926
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually evaluated							1,190
Collectively evaluated							9,737
Total allowance for loan losses	10,926		19,266	10,926			10,926
Loans [Abstract]
Individually evaluated							4,422
Collectively evaluated							847,577
Financing Receivable Acquired and Accounted under Modification of Impaired Loans							26
Loans and Leases Receivable, Net of Deferred Income, Total					844,901		852,025
Other consumer
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	6,639		5,988	5,988
Charge offs				(5,548)
Recoveries				868
Net Charge offs				(4,681)
Provision for loan losses				5,332
Balance at end of period				6,639
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually evaluated							125
Collectively evaluated							6,514
Total allowance for loan losses	6,639		5,988	6,639			6,639
Loans [Abstract]
Individually evaluated							1,247
Collectively evaluated							349,912
Financing Receivable Acquired and Accounted under Modification of Impaired Loans							0
Loans and Leases Receivable, Net of Deferred Income, Total							351,159
Total consumer
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	34,525		50,849	50,849
Charge offs				(10,716)
Recoveries				4,159
Net Charge offs				(6,558)
Provision for loan losses				(9,766)
Balance at end of period				34,525
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually evaluated							4,055
Collectively evaluated							30,471
Total allowance for loan losses	34,525		$ 50,849	34,525			34,525
Loans [Abstract]
Individually evaluated							41,223
Collectively evaluated							9,298,447
Financing Receivable Acquired and Accounted under Modification of Impaired Loans							495
Loans and Leases Receivable, Net of Deferred Income, Total					$ 9,324,079		$ 9,340,164
Allowance for Loan Losses [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	201,371
Jan. 1, 2020	313,828
Charge offs	(19,308)
Recoveries	2,268
Net Charge offs	(17,040)
Allowance for PCD loans for bank acquisition	3,504
Provision for loan losses	34,957
Balance at end of period	337,793			201,371
Allowance for credit losses on loans
Charge offs	(19,308)
Recoveries	2,268
Net Charge offs	17,040
Allowance for PCD loans for bank acquisition	3,504
Allowance for Loan Losses [Member] | First Staunton Bancshares [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for loan losses	2,543
Allowance for Loan Losses [Member] | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	112,457
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	112,457
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	112,457
Allowance for Loan Losses [Member] | Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	91,133
Jan. 1, 2020	144,052
Charge offs	(16,336)
Recoveries	1,288
Net Charge offs	(15,049)
Allowance for PCD loans for bank acquisition	293
Provision for loan losses	44,284
Balance at end of period	173,988			91,133
Allowance for credit losses on loans
Charge offs	(16,336)
Recoveries	1,288
Net Charge offs	15,049
Allowance for PCD loans for bank acquisition	293
Allowance for Loan Losses [Member] | Commercial and industrial | First Staunton Bancshares [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for loan losses	408
Allowance for Loan Losses [Member] | Commercial and industrial | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	52,919
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	52,919
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	52,919
Allowance for Loan Losses [Member] | Commercial real estate — owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	10,284
Jan. 1, 2020	8,433
Charge offs	0
Recoveries	0
Net Charge offs	0
Allowance for PCD loans for bank acquisition	890
Provision for loan losses	734
Balance at end of period	10,313			10,284
Allowance for credit losses on loans
Charge offs	0
Recoveries	0
Net Charge offs	0
Allowance for PCD loans for bank acquisition	890
Allowance for Loan Losses [Member] | Commercial real estate — owner occupied | First Staunton Bancshares [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for loan losses	255
Allowance for Loan Losses [Member] | Commercial real estate — owner occupied | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	(1,851)
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	(1,851)
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	(1,851)
Allowance for Loan Losses [Member] | Commercial and business lending
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	101,417
Jan. 1, 2020	152,485
Charge offs	(16,336)
Recoveries	1,288
Net Charge offs	(15,048)
Allowance for PCD loans for bank acquisition	1,183
Provision for loan losses	45,018
Balance at end of period	184,301			101,417
Allowance for credit losses on loans
Charge offs	(16,336)
Recoveries	1,288
Net Charge offs	15,048
Allowance for PCD loans for bank acquisition	1,183
Allowance for Loan Losses [Member] | Commercial and business lending | First Staunton Bancshares [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for loan losses	663
Allowance for Loan Losses [Member] | Commercial and business lending | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	51,068
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	51,068
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	51,068
Allowance for Loan Losses [Member] | Commercial real estate — investor
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	40,514
Jan. 1, 2020	42,555
Charge offs	0
Recoveries	0
Net Charge offs	0
Allowance for PCD loans for bank acquisition	753
Provision for loan losses	(1,664)
Balance at end of period	42,115			40,514
Allowance for credit losses on loans
Charge offs	0
Recoveries	0
Net Charge offs	0
Allowance for PCD loans for bank acquisition	753
Allowance for Loan Losses [Member] | Commercial real estate — investor | First Staunton Bancshares [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for loan losses	472
Allowance for Loan Losses [Member] | Commercial real estate — investor | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	2,041
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	2,041
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	2,041
Allowance for Loan Losses [Member] | Real estate construction
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	24,915
Jan. 1, 2020	32,382
Charge offs	(7)
Recoveries	19
Net Charge offs	(11)
Allowance for PCD loans for bank acquisition	435
Provision for loan losses	(2,573)
Balance at end of period	30,746			24,915
Allowance for credit losses on loans
Charge offs	(7)
Recoveries	19
Net Charge offs	11
Allowance for PCD loans for bank acquisition	435
Allowance for Loan Losses [Member] | Real estate construction | First Staunton Bancshares [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for loan losses	492
Allowance for Loan Losses [Member] | Real estate construction | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	7,467
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	7,467
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	7,467
Allowance for Loan Losses [Member] | Commercial real estate lending
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	65,428
Jan. 1, 2020	74,937
Charge offs	(7)
Recoveries	19
Net Charge offs	(11)
Allowance for PCD loans for bank acquisition	1,188
Provision for loan losses	(4,237)
Balance at end of period	72,861			65,428
Allowance for credit losses on loans
Charge offs	(7)
Recoveries	19
Net Charge offs	11
Allowance for PCD loans for bank acquisition	1,188
Allowance for Loan Losses [Member] | Commercial real estate lending | First Staunton Bancshares [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for loan losses	964
Allowance for Loan Losses [Member] | Commercial real estate lending | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	9,508
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	9,508
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	9,508
Allowance for Loan Losses [Member] | Total commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	166,846
Jan. 1, 2020	227,422
Charge offs	(16,343)
Recoveries	1,307
Net Charge offs	(15,037)
Allowance for PCD loans for bank acquisition	2,371
Provision for loan losses	40,781
Balance at end of period	257,162			166,846
Allowance for credit losses on loans
Charge offs	(16,343)
Recoveries	1,307
Net Charge offs	15,037
Allowance for PCD loans for bank acquisition	2,371
Allowance for Loan Losses [Member] | Total commercial | First Staunton Bancshares [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for loan losses	1,627
Allowance for Loan Losses [Member] | Total commercial | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	60,576
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	60,576
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	60,576
Allowance for Loan Losses [Member] | Residential mortgage
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	16,960
Jan. 1, 2020	50,175
Charge offs	(1,003)
Recoveries	91
Net Charge offs	(912)
Allowance for PCD loans for bank acquisition	651
Provision for loan losses	(6,370)
Balance at end of period	43,947			16,960
Allowance for credit losses on loans
Charge offs	(1,003)
Recoveries	91
Net Charge offs	912
Allowance for PCD loans for bank acquisition	651
Allowance for Loan Losses [Member] | Residential mortgage | First Staunton Bancshares [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for loan losses	403
Allowance for Loan Losses [Member] | Residential mortgage | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	33,215
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	33,215
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	33,215
Allowance for Loan Losses [Member] | Home equity
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	10,926
Jan. 1, 2020	22,575
Charge offs	(526)
Recoveries	598
Net Charge offs	(71)
Allowance for PCD loans for bank acquisition	422
Provision for loan losses	(1,135)
Balance at end of period	22,308			10,926
Allowance for credit losses on loans
Charge offs	(526)
Recoveries	598
Net Charge offs	71
Allowance for PCD loans for bank acquisition	422
Allowance for Loan Losses [Member] | Home equity | First Staunton Bancshares [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for loan losses	374
Allowance for Loan Losses [Member] | Home equity | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	11,649
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	11,649
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	11,649
Allowance for Loan Losses [Member] | Other consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	6,639
Jan. 1, 2020	13,655
Charge offs	(1,434)
Recoveries	272
Net Charge offs	(1,162)
Allowance for PCD loans for bank acquisition	61
Provision for loan losses	1,681
Balance at end of period	14,376			6,639
Allowance for credit losses on loans
Charge offs	(1,434)
Recoveries	272
Net Charge offs	1,162
Allowance for PCD loans for bank acquisition	61
Allowance for Loan Losses [Member] | Other consumer | First Staunton Bancshares [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for loan losses	140
Allowance for Loan Losses [Member] | Other consumer | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	7,016
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	7,016
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	7,016
Allowance for Loan Losses [Member] | Total consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	34,525
Jan. 1, 2020	86,405
Charge offs	(2,963)
Recoveries	961
Net Charge offs	(2,003)
Allowance for PCD loans for bank acquisition	1,134
Provision for loan losses	(5,824)
Balance at end of period	80,631			34,525
Allowance for credit losses on loans
Charge offs	(2,963)
Recoveries	961
Net Charge offs	2,003
Allowance for PCD loans for bank acquisition	1,134
Allowance for Loan Losses [Member] | Total consumer | First Staunton Bancshares [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for loan losses	917
Allowance for Loan Losses [Member] | Total consumer | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	51,880
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	51,880
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	51,880
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member]
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period	21,907
Jan. 1, 2020	40,597
Provision for loan losses	15,500
Balance at end of period	56,276			21,907
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | First Staunton Bancshares [Member]
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Provision for loan losses	179
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	18,690
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	18,690
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	18,690
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial and industrial
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period	12,276
Jan. 1, 2020	8,278
Provision for loan losses	6,461
Balance at end of period	14,800			12,276
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial and industrial | First Staunton Bancshares [Member]
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Provision for loan losses	61
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial and industrial | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	(3,998)
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	(3,998)
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	(3,998)
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate — owner occupied
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period	127
Jan. 1, 2020	127
Provision for loan losses	109
Balance at end of period	240			127
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate — owner occupied | First Staunton Bancshares [Member]
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Provision for loan losses	4
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate — owner occupied | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	0
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	0
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	0
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial and business lending
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period	12,403
Jan. 1, 2020	8,405
Provision for loan losses	6,570
Balance at end of period	15,040			12,403
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial and business lending | First Staunton Bancshares [Member]
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Provision for loan losses	65
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial and business lending | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	(3,998)
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	(3,998)
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	(3,998)
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate — investor
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period	530
Jan. 1, 2020	776
Provision for loan losses	(347)
Balance at end of period	431			530
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate — investor | First Staunton Bancshares [Member]
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Provision for loan losses	2
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate — investor | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	246
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	246
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	246
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Real estate construction
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period	7,532
Jan. 1, 2020	25,879
Provision for loan losses	9,018
Balance at end of period	34,942			7,532
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Real estate construction | First Staunton Bancshares [Member]
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Provision for loan losses	45
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Real estate construction | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	18,347
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	18,347
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	18,347
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate lending
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period	8,062
Jan. 1, 2020	26,655
Provision for loan losses	8,671
Balance at end of period	35,373			8,062
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate lending | First Staunton Bancshares [Member]
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Provision for loan losses	47
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate lending | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	18,593
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	18,593
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	18,593
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Total commercial
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period	20,465
Jan. 1, 2020	35,060
Provision for loan losses	15,241
Balance at end of period	50,413			20,465
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Total commercial | First Staunton Bancshares [Member]
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Provision for loan losses	112
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Total commercial | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	14,595
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	14,595
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	14,595
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Home equity
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period	1,038
Jan. 1, 2020	3,629
Provision for loan losses	241
Balance at end of period	3,936			1,038
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Home equity | First Staunton Bancshares [Member]
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Provision for loan losses	66
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Home equity | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	2,591
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	2,591
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	2,591
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Other consumer
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period	405
Jan. 1, 2020	1,909
Provision for loan losses	17
Balance at end of period	1,926			405
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Other consumer | First Staunton Bancshares [Member]
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Provision for loan losses	0
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Other consumer | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	1,504
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	1,504
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	1,504
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Total consumer
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period	1,443
Jan. 1, 2020	5,538
Provision for loan losses	258
Balance at end of period	5,862			1,443
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Total consumer | First Staunton Bancshares [Member]
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Provision for loan losses	66
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Total consumer | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	4,095
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	4,095
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	4,095
Allowance for Loans Losses and Unfunded Commitments [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs	(19,308)
Recoveries	2,268
Net Charge offs	(17,040)
Allowance for PCD loans for bank acquisition	3,504
Allowance for credit losses on loans
Balance at beginning of period	223,278
Jan. 1, 2020	354,425
Charge offs	(19,308)
Recoveries	2,268
Net Charge offs	17,040
Allowance for PCD loans for bank acquisition	3,504
Provision for credit losses	50,457
Balance at end of period	394,069			223,278
Percent of Loans					1.62%
Allowance for Loans Losses and Unfunded Commitments [Member] | First Staunton Bancshares [Member]
Allowance for credit losses on loans
Provision for credit losses	2,722
Allowance for Loans Losses and Unfunded Commitments [Member] | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	131,147
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	131,147
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	131,147
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs	(16,336)
Recoveries	1,288
Net Charge offs	(15,049)
Allowance for PCD loans for bank acquisition	293
Allowance for credit losses on loans
Balance at beginning of period	103,409
Jan. 1, 2020	152,330
Charge offs	(16,336)
Recoveries	1,288
Net Charge offs	15,049
Allowance for PCD loans for bank acquisition	293
Provision for credit losses	50,745
Balance at end of period	188,788			103,409
Percent of Loans					2.22%
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial and industrial | First Staunton Bancshares [Member]
Allowance for credit losses on loans
Provision for credit losses	469
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial and industrial | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	48,921
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	48,921
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	48,921
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate — owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs	0
Recoveries	0
Net Charge offs	0
Allowance for PCD loans for bank acquisition	890
Allowance for credit losses on loans
Balance at beginning of period	10,411
Jan. 1, 2020	8,560
Charge offs	0
Recoveries	0
Net Charge offs	0
Allowance for PCD loans for bank acquisition	890
Provision for credit losses	843
Balance at end of period	10,553			10,411
Percent of Loans					1.12%
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate — owner occupied | First Staunton Bancshares [Member]
Allowance for credit losses on loans
Provision for credit losses	259
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate — owner occupied | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	(1,851)
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	(1,851)
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	(1,851)
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial and business lending
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs	(16,336)
Recoveries	1,288
Net Charge offs	(15,048)
Allowance for PCD loans for bank acquisition	1,183
Allowance for credit losses on loans
Balance at beginning of period	113,820
Jan. 1, 2020	160,890
Charge offs	(16,336)
Recoveries	1,288
Net Charge offs	15,048
Allowance for PCD loans for bank acquisition	1,183
Provision for credit losses	51,588
Balance at end of period	199,342			113,820
Percent of Loans					2.11%
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial and business lending | First Staunton Bancshares [Member]
Allowance for credit losses on loans
Provision for credit losses	728
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial and business lending | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	47,070
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	47,070
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	47,070
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate — investor
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs	0
Recoveries	0
Net Charge offs	0
Allowance for PCD loans for bank acquisition	753
Allowance for credit losses on loans
Balance at beginning of period	41,044
Jan. 1, 2020	43,331
Charge offs	0
Recoveries	0
Net Charge offs	0
Allowance for PCD loans for bank acquisition	753
Provision for credit losses	(2,011)
Balance at end of period	42,546			41,044
Percent of Loans					1.05%
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate — investor | First Staunton Bancshares [Member]
Allowance for credit losses on loans
Provision for credit losses	474
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate — investor | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	2,287
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	2,287
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	2,287
Allowance for Loans Losses and Unfunded Commitments [Member] | Real estate construction
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs	(7)
Recoveries	19
Net Charge offs	(11)
Allowance for PCD loans for bank acquisition	435
Allowance for credit losses on loans
Balance at beginning of period	32,447
Jan. 1, 2020	58,261
Charge offs	(7)
Recoveries	19
Net Charge offs	11
Allowance for PCD loans for bank acquisition	435
Provision for credit losses	6,445
Balance at end of period	65,688			32,447
Percent of Loans					4.25%
Allowance for Loans Losses and Unfunded Commitments [Member] | Real estate construction | First Staunton Bancshares [Member]
Allowance for credit losses on loans
Provision for credit losses	537
Allowance for Loans Losses and Unfunded Commitments [Member] | Real estate construction | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	25,814
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	25,814
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	25,814
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate lending
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs	(7)
Recoveries	19
Net Charge offs	(11)
Allowance for PCD loans for bank acquisition	1,188
Allowance for credit losses on loans
Balance at beginning of period	73,490
Jan. 1, 2020	101,591
Charge offs	(7)
Recoveries	19
Net Charge offs	11
Allowance for PCD loans for bank acquisition	1,188
Provision for credit losses	4,434
Balance at end of period	108,235			73,490
Percent of Loans					1.94%
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate lending | First Staunton Bancshares [Member]
Allowance for credit losses on loans
Provision for credit losses	1,011
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate lending | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	28,101
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	28,101
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	28,101
Allowance for Loans Losses and Unfunded Commitments [Member] | Total commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs	(16,343)
Recoveries	1,307
Net Charge offs	(15,037)
Allowance for PCD loans for bank acquisition	2,371
Allowance for credit losses on loans
Balance at beginning of period	187,311
Jan. 1, 2020	262,482
Charge offs	(16,343)
Recoveries	1,307
Net Charge offs	15,037
Allowance for PCD loans for bank acquisition	2,371
Provision for credit losses	56,022
Balance at end of period	307,577			187,311
Percent of Loans					2.04%
Allowance for Loans Losses and Unfunded Commitments [Member] | Total commercial | First Staunton Bancshares [Member]
Allowance for credit losses on loans
Provision for credit losses	1,739
Allowance for Loans Losses and Unfunded Commitments [Member] | Total commercial | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	75,171
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	75,171
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	75,171
Allowance for Loans Losses and Unfunded Commitments [Member] | Residential mortgage
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs	(1,003)
Recoveries	91
Net Charge offs	(912)
Allowance for PCD loans for bank acquisition	651
Allowance for credit losses on loans
Balance at beginning of period	16,960
Jan. 1, 2020	50,175
Charge offs	(1,003)
Recoveries	91
Net Charge offs	912
Allowance for PCD loans for bank acquisition	651
Provision for credit losses	(6,370)
Balance at end of period	43,947			16,960
Percent of Loans					0.54%
Allowance for Loans Losses and Unfunded Commitments [Member] | Residential mortgage | First Staunton Bancshares [Member]
Allowance for credit losses on loans
Provision for credit losses	403
Allowance for Loans Losses and Unfunded Commitments [Member] | Residential mortgage | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	33,215
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	33,215
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	33,215
Allowance for Loans Losses and Unfunded Commitments [Member] | Home equity
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs	(526)
Recoveries	598
Net Charge offs	(71)
Allowance for PCD loans for bank acquisition	422
Allowance for credit losses on loans
Balance at beginning of period	11,964
Jan. 1, 2020	26,204
Charge offs	(526)
Recoveries	598
Net Charge offs	71
Allowance for PCD loans for bank acquisition	422
Provision for credit losses	(894)
Balance at end of period	26,244			11,964
Percent of Loans					3.11%
Allowance for Loans Losses and Unfunded Commitments [Member] | Home equity | First Staunton Bancshares [Member]
Allowance for credit losses on loans
Provision for credit losses	440
Allowance for Loans Losses and Unfunded Commitments [Member] | Home equity | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	14,240
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	14,240
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	14,240
Allowance for Loans Losses and Unfunded Commitments [Member] | Other consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs	(1,434)
Recoveries	272
Net Charge offs	(1,162)
Allowance for PCD loans for bank acquisition	61
Allowance for credit losses on loans
Balance at beginning of period	7,044
Jan. 1, 2020	15,564
Charge offs	(1,434)
Recoveries	272
Net Charge offs	1,162
Allowance for PCD loans for bank acquisition	61
Provision for credit losses	1,698
Balance at end of period	16,302			7,044
Percent of Loans					4.70%
Allowance for Loans Losses and Unfunded Commitments [Member] | Other consumer | First Staunton Bancshares [Member]
Allowance for credit losses on loans
Provision for credit losses	140
Allowance for Loans Losses and Unfunded Commitments [Member] | Other consumer | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	8,520
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	8,520
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	8,520
Allowance for Loans Losses and Unfunded Commitments [Member] | Total consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs	(2,963)
Recoveries	961
Net Charge offs	(2,003)
Allowance for PCD loans for bank acquisition	1,134
Allowance for credit losses on loans
Balance at beginning of period	35,968
Jan. 1, 2020	91,943
Charge offs	(2,963)
Recoveries	961
Net Charge offs	2,003
Allowance for PCD loans for bank acquisition	1,134
Provision for credit losses	(5,566)
Balance at end of period	86,493			$ 35,968
Percent of Loans					0.93%
Allowance for Loans Losses and Unfunded Commitments [Member] | Total consumer | First Staunton Bancshares [Member]
Allowance for credit losses on loans
Provision for credit losses	983
Allowance for Loans Losses and Unfunded Commitments [Member] | Total consumer | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	55,975
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	55,975
Allowance for credit losses on loans
Cumulative effect of ASU 2016-13 adoption (CECL)	$ 55,975
[1]	(b) At January 1, 2020, the adoption of ASU 2016-13 resulted in an increase to the allowance for loan losses of $112 million and an increase to the allowance for unfunded commitments of $19 million for a total increase to the ACLL of $131 million. A corresponding after tax decrease to common equity of $98 million was recorded along with a deferred tax asset of $33 million, included in accrued expenses and other liabilities. Prior periods were unadjusted due to the modified retrospective application of ASU 2016-13.

Loans Narrative (Details)

Loans Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Jan. 01, 2020	Dec. 31, 2019
Loans Information [Line Items]
Interest Receivable	$ 92,377			$ 91,196
Financing Receivable, Nonaccrual, Interest Income	approximately $327,000
Recorded Investment, loans modified in troubled debt restructuring	$ 4,899	$ 4,739
Restructured Loans Subsequently Accruing	1,000
Ytd Restructured Loans Still On Nonaccrual	4,000
Loans and Finance Receivables [Member]
Loans Information [Line Items]
Interest Receivable	66,000
Possible Liquidity Issues [Member]
Loans Information [Line Items]
Financing Receivable, Troubled Debt Restructuring	138,000		$ 114,000
Possible Liquidity Issues [Member] | Oil and Gas Portfolio Segment [Member]
Loans Information [Line Items]
Financing Receivable, Troubled Debt Restructuring	112,000
Possible Liquidity Issues [Member] | Commercial and business lending
Loans Information [Line Items]
Financing Receivable, Troubled Debt Restructuring	$ 27,000

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets, Summary of Core Deposit and Other Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Summary of core deposit intangibles and other intangibles
Amortization during the year	$ 2,814	$ 2,226
Core Deposit Intangibles
Summary of core deposit intangibles and other intangibles
Gross carrying amount at the beginning of the year	80,730		$ 58,100
Accumulated amortization	(14,597)		(12,456)
Net book value	73,512		68,274
Amortization during the year	2,141		7,130
Adjustments to Core Deposits [Member]
Summary of core deposit intangibles and other intangibles
Additions during the period	7,379		22,630
Adjustments to Other Intangibles [Member]
Summary of core deposit intangibles and other intangibles
Additions during the period	200		0
Other Intangibles
Summary of core deposit intangibles and other intangibles
Gross carrying amount at the beginning of the year	38,970		44,887
Reductions due to sale	(343)		(217)
Accumulated amortization	(19,616)		(24,643)
Net book value	19,211		20,027
Amortization during the year	$ 673		$ 2,818

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets, Mortgage Servicing Rights Roll-Forward (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Mortgage servicing rights
Mortgage servicing rights at beginning of period	$ 67,607	$ 68,433
Additions from acquisition	1,357	0
Additions	2,359	11,606
Amortization	(3,635)	(12,432)
Mortgage servicing rights at end of period	67,688	67,607
Valuation Allowance for Impairment of Recognized Servicing Assets [Roll Forward]
Valuation allowance at beginning of period	(302)	(239)
(Additions) recoveries, net	(9,098)	(63)
Valuation allowance at end of period	(9,399)	(302)
Mortgage servicing rights, net	58,289	67,306
Fair value of mortgage servicing rights	58,311	72,532
Portfolio of residential mortgage loans serviced for others (“servicing portfolio”)	$ 8,548,600	$ 8,488,969
Mortgage servicing rights, net to servicing portfolio	0.68%	0.79%
Mortgage servicing rights expense(a)	$ 12,733	$ 12,494

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets, Estimated Future Amortization Expense (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Core Deposit Intangibles
Estimated future amortization expense
Nine Months Ending December 31, 2020	$ 6,608
Year ending December 31, 2021	8,811
Year ending December 31, 2022	8,811
Year ending December 31, 2023	8,811
Year ending December 31, 2024	8,811
Year ending December 31, 2025	8,811
Beyond 2025	22,849
Net book value	73,512	$ 68,274
Other Intangibles
Estimated future amortization expense
Nine Months Ending December 31, 2020	2,008
Year ending December 31, 2021	2,653
Year ending December 31, 2022	2,629
Year ending December 31, 2023	2,610
Year ending December 31, 2024	2,591
Year ending December 31, 2025	2,302
Beyond 2025	4,418
Net book value	19,211	$ 20,027
Mortgage Servicing Rights
Estimated future amortization expense
Nine Months Ending December 31, 2020	9,609
Year ending December 31, 2021	13,307
Year ending December 31, 2022	10,456
Year ending December 31, 2023	8,279
Year ending December 31, 2024	6,632
Year ending December 31, 2025	5,372
Beyond 2025	14,032
Net book value	$ 67,688

Goodwill and Other Intangible_6

Goodwill and Other Intangible Assets (Details Textuals) - USD ($) $ in Thousands	Feb. 14, 2020	Mar. 31, 2020	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, Impairment Loss		$ 0	$ 0
Goodwill [Line Items]
Goodwill		1,191,388	1,176,230
Other Intangibles
Goodwill [Line Items]
Finite-Lived Intangible Assets, Net		19,211	20,027
First Staunton Bancshares [Member]
Goodwill [Line Items]
Goodwill, Acquired During Period	$ 15,158
Insurance Operations [Member]
Goodwill [Line Items]
Goodwill		82,000
Insurance Operations [Member] | Other Intangibles
Goodwill [Line Items]
Finite-Lived Intangible Assets, Net		$ 18,000	$ 18,000

Short and Long-Term Funding, FH

Short and Long-Term Funding, FHLB Advances (Components of Short-term and Long-term Funding) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Short-term Funding [Abstract]
Federal funds purchased	$ 24,480	$ 362,000
Securities sold under agreements to repurchase	108,527	71,097
Federal funds purchased and securities sold under agreements to repurchase	133,007	433,097
Commercial paper	33,647	32,016
Total short-term funding	166,654	465,113
Long-Term Funding
Corporation subordinated notes, at par, due 2025	250,000	250,000
Finance Lease, Liability	2,210	2,209
Capitalized costs	(2,565)	(2,866)
Total long-term funding	549,644	549,343
Total short and long-term funding, excluding FHLB advances	716,299	1,014,456
FHLB Advances
Short-term FHLB advances	550,000	520,000
Long-term FHLB advances	2,664,194	2,660,967
Total FHLB advances	3,214,194	3,180,967
Total short and long-term funding	3,930,493	4,195,422
Bank senior notes, at par, due 2021
Long-Term Funding
Senior notes	$ 300,000	$ 300,000

Short and Long-Term Funding (Re

Short and Long-Term Funding (Remaining Contractual Maturity of the Securities Sold Under Agreements to Repurchase) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
RemainingContractualMaturityoftheSecuritiesSoldUnderAgreementtoRepurchase [Line Items]
Repurchase agreements	$ 108,257	$ 71,097
Overnight and Continuous
RemainingContractualMaturityoftheSecuritiesSoldUnderAgreementtoRepurchase [Line Items]
Repurchase agreements	108,527	71,097
Up to 30 days
RemainingContractualMaturityoftheSecuritiesSoldUnderAgreementtoRepurchase [Line Items]
Repurchase agreements	0	0
30-90 days
RemainingContractualMaturityoftheSecuritiesSoldUnderAgreementtoRepurchase [Line Items]
Repurchase agreements	0	0
Greater than 90 days
RemainingContractualMaturityoftheSecuritiesSoldUnderAgreementtoRepurchase [Line Items]
Repurchase agreements	0	0
Agency mortgage-related securities
RemainingContractualMaturityoftheSecuritiesSoldUnderAgreementtoRepurchase [Line Items]
Repurchase agreements	108,527	71,097
Agency mortgage-related securities | Overnight and Continuous
RemainingContractualMaturityoftheSecuritiesSoldUnderAgreementtoRepurchase [Line Items]
Repurchase agreements	108,527	71,097
Agency mortgage-related securities | Up to 30 days
RemainingContractualMaturityoftheSecuritiesSoldUnderAgreementtoRepurchase [Line Items]
Repurchase agreements	0	0
Agency mortgage-related securities | 30-90 days
RemainingContractualMaturityoftheSecuritiesSoldUnderAgreementtoRepurchase [Line Items]
Repurchase agreements	0	0
Agency mortgage-related securities | Greater than 90 days
RemainingContractualMaturityoftheSecuritiesSoldUnderAgreementtoRepurchase [Line Items]
Repurchase agreements	$ 0	$ 0

Short and Long-Term Funding (Lo

Short and Long-Term Funding (Long-term Funding Narrative) (Details) - USD ($) $ in Millions	Aug. 13, 2018	Nov. 13, 2014	Nov. 30, 2014	Dec. 31, 2019	Mar. 31, 2020
Long-Term Funding
Carrying Value of Securities Purchased under Agreements to Resell and Deposits Paid for Securities Borrowed					$ 202
Two Thousand Eighteen Senior Notes [Member] [Domain]
Long-Term Funding
Debt Instrument, Issuance Date Month, Year	August 2018
New Senior Debt Issued	$ 300
Debt Instrument, Maturity Date Month, Year	August 2021
Debt Instrument Call Date Earliest Month Year	July 2021
Debt Instrument, Interest Rate, Stated Percentage	3.50%
Finance Leases [Member]
Long-Term Funding
Debt Instrument, Term				40 years
Debt Instrument, Maturity Date Month, Year				August 2059
Debt Instrument, Interest Rate, Stated Percentage				3.99%
Debt Instrument, Option to Purchase, Month Year				August 2022
Debt Instrument, Option to Purchase Price				$ 1.2
Two Thousand Fourteen Subordinated Notes
Long-Term Funding
Debt Instrument, Issuance Date Month, Year		November 2014
Junior Subordinated Debentures Issued			$ 250
Debt Instrument, Term			10 years
Debt Instrument, Maturity Date Month, Year		January 2025
Debt Instrument Call Date Earliest Month Year		October 2024
Subordinated Borrowing, Interest Rate			4.25%

Derivative and Hedging Activi_3

Derivative and Hedging Activities, Derivative Instruments Not Designated as Hedging Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Asset
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Derivatives (trading and other assets), fair value	$ 311,413	$ 104,305
Less: Legally enforceable master netting agreements	2,847	10,410
Less: Cash collateral pledged/received	69,654	1,408
Derivative Asset	238,912	92,487
Liability
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Derivatives (trading and other liabilities), fair value	118,228	37,455
Less: Legally enforceable master netting agreements	2,847	10,410
Less: Cash collateral pledged/received	30,645	11,365
Derivatives (trading liabilities)	84,736	15,680
Not designated as hedging instruments | Asset | Interest rate-related instruments — customer and mirror
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	3,430,859	3,029,877
Derivatives (trading and other assets), fair value	220,445	77,024
Not designated as hedging instruments | Asset | Foreign currency exchange forwards
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	322,066	272,636
Derivatives (trading and other assets), fair value	9,272	4,226
Not designated as hedging instruments | Asset | Commodity contracts
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	208,621	255,089
Derivatives (trading and other assets), fair value	69,241	20,528
Not designated as hedging instruments | Asset | Mortgage banking(a)
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	343,193	255,291
Derivatives (trading and other assets), fair value	12,454	2,527
Not designated as hedging instruments | Liability | Interest rate-related instruments — customer and mirror
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	3,430,859	3,029,877
Derivatives (trading and other liabilities), fair value	30,449	13,073
Not designated as hedging instruments | Liability | Foreign currency exchange forwards
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	295,774	264,653
Derivatives (trading and other liabilities), fair value	9,215	4,048
Not designated as hedging instruments | Liability | Commodity contracts
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	203,955	255,165
Derivatives (trading and other liabilities), fair value	67,592	19,624
Not designated as hedging instruments | Liability | Mortgage banking(a)
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	471,000	263,000
Derivatives (trading and other liabilities), fair value	$ 10,972	$ 710

Derivative and Hedging Activi_4

Derivative and Hedging Activities Income impact of Fair Value and Cash Flow Hedge (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Interest Income
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	$ (322)	$ 166
Other Income (Expense)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	(262)	0
Not Designated as Hedging Instrument, Economic Hedge [Member] | Interest Income
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	(322)	2,057
Not Designated as Hedging Instrument, Economic Hedge [Member] | Other Income (Expense)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	(262)	0
Designated as Hedging Instrument | Interest Income
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	0	(1,891)
Designated as Hedging Instrument | Other Income (Expense)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	$ 0	$ 0

Derivative and Hedging Activi_5

Derivative and Hedging Activities Derivative Impact on Perfomance (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Capital markets, net | Interest rate-related instruments — customer and mirror, net
Derivative Instruments
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ (3,090)	$ (672)
Capital markets, net | Foreign currency exchange forwards
Derivative Instruments
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	(122)	26
Capital markets, net | Commodity contracts
Derivative Instruments
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	746	(567)
Mortgage banking, net | Interest rate lock commitments (mortgage)
Derivative Instruments
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	9,928	824
Mortgage banking, net | Forward commitments (mortgage)
Derivative Instruments
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ (10,262)	$ 247

Derivative and Hedging Activi_6

Derivative and Hedging Activities (Details Textuals) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Investment securities and cash equivalents pledged as collateral	$ 80	$ 57
Derivative collateral right to reclaim cash	36	14
Designated as Hedging Instrument
Balance Sheet Recording of Fair Value Hedge [Line Items]
Derivative Liability Notional Amount, Terminated		$ 500
Underlying Hedged Asset, Amortized Cost Basis	829
Deferred (Gain) Loss on Discontinuation of Fair Value Hedge	$ 5

Balance Sheet Offsetting (Detai

Balance Sheet Offsetting (Details) - Interest Rate Contract - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Derivative assets
Gross Amounts Recognized	$ 72,501	$ 11,864
Derivative Assets Offset	(2,847)	(10,410)
Derivative Asset, Collateral, Obligation to Return Cash, Offset	(69,654)	(1,408)
Net Amounts Presented on the Consolidated Balance Sheets	0	45
Investment Securities Received	0	0
Net amount	0	45
Derivative liabilities
Gross Amounts Recognized	34,014	22,189
Derivative Liability, Fair Value, Gross Asset	(2,847)	(10,410)
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	(30,645)	(11,365)
Net Amounts Presented on the Consolidated Balance Sheets	523	413
Investment Securities Pledged	0	0
Net amount	$ 523	$ 413

Commitments, Off-Balance Shee_3

Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters, Summary of Lending Related and Other Commitments (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Schedule of lending-related and other commitments [Line Items]
Lending related commitments, fair value	$ 0	$ 0
Commitments to extend credit, excluding commitments to originate residential mortgage loans held for sale(a)(b)
Summary of lending-related and other commitments
Lending related commitments	8,483,952	9,024,412
Commercial letters of credit(a)
Summary of lending-related and other commitments
Lending related commitments	7,966	7,081
Standby letters of credit(c)
Summary of lending-related and other commitments
Lending related commitments	265,406	277,969
Standby letters of credit, fair value	$ 3,000	$ 3,000

Commitment, Changes in the Allo

Commitment, Changes in the Allowance for Unfunded Commitments (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020		Dec. 31, 2019
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period	$ 21,907
Provision for loan losses	15,500
Balance at end of period	56,276		$ 21,907
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	21,907
Balance at end of period	56,276	[1]	21,907
First Staunton Bancshares [Member]
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Provision for loan losses	179
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member]
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period, adjusted	40,597
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	21,907		24,336
Balance at beginning of period, adjusted			24,336
Provision for unfunded commitments	16,000		(2,500)
Balance at end of period			21,907
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Accounting Standards Update 2016-13
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect of ASU 2016-13 adoption (CECL)	$ 18,690
Amount Recorded at Acquisition [Member] | SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Amount recorded at acquisition			$ 70
[1]	(b) At January 1, 2020, the adoption of ASU 2016-13 resulted in an increase to the allowance for loan losses of $112 million and an increase to the allowance for unfunded commitments of $19 million for a total increase to the ACLL of $131 million. A corresponding after tax decrease to common equity of $98 million was recorded along with a deferred tax asset of $33 million, included in accrued expenses and other liabilities. Prior periods were unadjusted due to the modified retrospective application of ASU 2016-13.

Commitments, Off-Balance Shee_4

Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters (Details Textuals) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Mar. 31, 2020		Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities (Textuals) [Line Items]
Expense Related to Qualified Affordable Housing Projects	$ 6,000		$ 5,000
Remaining Investment in Qualified Affordable Housing Projects	268,000			$ 234,000
Variable Interest Entity Reporting Entity Involvement Unfunded Obligation Amount	148,000			123,000
Qualified Affordable Housing Investments, Impairment Loss	0			0
Loans Repurchased Under Make Whole Requests	$ 2,000			$ 2,000
Loans Sold To Outside Investors Loss ReimbursementSettlement Paid	no			negligible
Loans Sold To Outside Investors Original Amount	$ 12,700,000
Loans Sold To Outside Investors Remaining Outstanding Amount	7,400,000
Unfunded Commitments	56,276	[1]		$ 21,907
Residential Mortgage Loans Sold With Recourse Risk	44,000			39,000
Residential Mortgage Loans Sold With Credit Recourse Risk	42,000			45,000
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member]
Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities (Textuals) [Line Items]
Provision for unfunded commitments	16,000			(2,500)
Unfunded Commitments				21,907	$ 24,336
Mortgage Repurchase Reserve
Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities (Textuals) [Line Items]
Unfunded Commitments	1,000			795
UnconsolidatedProjectsLowIncomeHousing [Member]
Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities (Textuals) [Line Items]
Other Investments	282,000			248,000
PrincipalInvestmentCommitment [Member]
Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities (Textuals) [Line Items]
Other Investments	28,000			$ 26,000
Accounting Standards Update 2016-13 | SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member]
Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities (Textuals) [Line Items]
Cumulative effect of ASU 2016-13 adoption (CECL)	$ 18,690
[1]	(b) At January 1, 2020, the adoption of ASU 2016-13 resulted in an increase to the allowance for loan losses of $112 million and an increase to the allowance for unfunded commitments of $19 million for a total increase to the ACLL of $131 million. A corresponding after tax decrease to common equity of $98 million was recorded along with a deferred tax asset of $33 million, included in accrued expenses and other liabilities. Prior periods were unadjusted due to the modified retrospective application of ASU 2016-13.

Fair Value Measurements, Assets

Fair Value Measurements, Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Assets, Fair Value Disclosure [Abstract]
Investment securities available for sale	$ 2,928,787	$ 3,262,586
Fair Value, Inputs, Level 2
Assets, Fair Value Disclosure [Abstract]
Investment securities available for sale	2,928,787	3,262,586
Residential Held-for-sale, Fair Value Disclosure	366,330	136,280
Fair Value, Inputs, Level 3
Assets, Fair Value Disclosure [Abstract]
Trading assets	12,454	2,527
Liabilities, Fair Value Disclosure [Abstract]
Trading liabilities	10,972	710
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1 | Other Debt And Other Equity Securities
Assets, Fair Value Disclosure [Abstract]
Investment securities available for sale	1,618	1,646
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | GNMA
Assets, Fair Value Disclosure [Abstract]
Investment securities available for sale	823,787	985,139
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | FFELP asset backed securities
Assets, Fair Value Disclosure [Abstract]
Investment securities available for sale	341,424	263,693
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Other Debt And Other Equity Securities
Assets, Fair Value Disclosure [Abstract]
Investment securities available for sale	3,000	3,000
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Available-for-sale Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Investment securities available for sale	2,928,787	3,262,586
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Residential loans held for sale
Assets, Fair Value Disclosure [Abstract]
Investment securities available for sale	366,330	136,280
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Interest rate-related instruments — customer and mirror, net
Assets, Fair Value Disclosure [Abstract]
Trading assets	220,445	77,024
Liabilities, Fair Value Disclosure [Abstract]
Trading liabilities	30,449	13,073
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Foreign currency exchange forwards
Assets, Fair Value Disclosure [Abstract]
Trading assets	9,272	4,226
Liabilities, Fair Value Disclosure [Abstract]
Trading liabilities	9,215	4,048
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Commodity contracts
Assets, Fair Value Disclosure [Abstract]
Trading assets	69,241	20,528
Liabilities, Fair Value Disclosure [Abstract]
Trading liabilities	67,592	19,624
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Mortgage banking(a)
Assets, Fair Value Disclosure [Abstract]
Trading assets	12,454	2,527
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Forward commitments (mortgage)
Liabilities, Fair Value Disclosure [Abstract]
Trading liabilities	10,972	710
FNMA / FHLMC | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | FNMA / FHLMC
Assets, Fair Value Disclosure [Abstract]
Investment securities available for sale	104,485	132,660
FNMA / FHLMC | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Commercial mortgage-related securities
Assets, Fair Value Disclosure [Abstract]
Investment securities available for sale	22,773	21,728
GNMA | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Commercial mortgage-related securities
Assets, Fair Value Disclosure [Abstract]
Investment securities available for sale	1,114,443	1,310,207
Obligations of state and political subdivisions (municipal securities)
Assets, Fair Value Disclosure [Abstract]
Investment securities available for sale	508,636	546,160
Obligations of state and political subdivisions (municipal securities) | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Assets, Fair Value Disclosure [Abstract]
Investment securities available for sale	508,636	546,160
U.S. government SBA agency securities
Assets, Fair Value Disclosure [Abstract]
Investment securities available for sale	10,238
U.S. government SBA agency securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Assets, Fair Value Disclosure [Abstract]
Investment securities available for sale	$ 10,238	$ 0

Fair Value Measurements Financi

Fair Value Measurements Financial Instruments Classified Within Level 3 (Details) - Derivative Financial Instruments - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning Balance	$ 1,817	$ 140
Mortgage derivative gain (loss)	(334)	1,681
Ending Balance	$ 1,482	$ 1,817

Fair Value Measurements Equity

Fair Value Measurements Equity Securities Without Readily Determinable Fair Values (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020USD ($)
Equity Securities Without Readily Determinable Fair Value Amount [Roll Forward]
Carrying value as of December 31, 2019	$ 13,000
Carrying value as of March 31, 2020	13,000
Fair Value, Inputs, Level 3
Equity Securities Without Readily Determinable Fair Value Amount [Roll Forward]
Carrying value as of December 31, 2019	13,444
Carrying value changes	0
Carrying value as of March 31, 2020	13,444
Cumulative upward carrying value changes between January 1, 2018 and March 31, 2020	13,444
Cumulative downward carrying value changes/impairment between January 1, 2018 and March 31, 2020	$ 0

Fair Value Measurements, Asse_2

Fair Value Measurements, Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Assets and Liabilities Measured at Fair Value on a Non-recurring Basis
Mortgage servicing rights	$ 58,311		$ 72,532
Mortgage banking, net	9,098	$ 121
Equity securities	13,000		13,000
Investment securities gains (losses), net	15,063		15,090
Fair Value, Inputs, Level 3
Assets and Liabilities Measured at Fair Value on a Non-recurring Basis
Equity securities	13,444		13,444
Investment securities gains (losses), net	13,444		13,444
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 2
Assets and Liabilities Measured at Fair Value on a Non-recurring Basis
OREO(b)	1,382		3,565
Other noninterest expense	(806)		(1,860)
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3
Assets and Liabilities Measured at Fair Value on a Non-recurring Basis
Individually evaluated loans(a)	103,108		45,792
Provision for credit losses	(23,840)		(66,172)
Mortgage servicing rights	58,311		72,532
Mortgage banking, net	(9,098)		(63)
Equity securities	13,444		13,444
Investment securities gains (losses), net	$ 0		$ 13,444

Fair Value Measurements Fair Va

Fair Value Measurements Fair Value Unobservable Level 3 Measurements (Details) - Fair Value, Inputs, Level 3	3 Months Ended
	Mar. 31, 2020
Discounted Cash Flow | Mortgage Servicing Rights
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Discount Rate	9.00%
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Prepayment Speed	15.00%
Appraisals/Discounted Cash Flow | Impaired Finance Receivable
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Discount Rate	44.00%

Fair Value Measurements, Fair V

Fair Value Measurements, Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Financial assets
Cash and due from banks	$ 480,337	$ 373,380
Interest-bearing deposits in other financial institutions	176,440	207,624
Federal funds sold and securities purchased under agreements to resell	22,455	7,740
Investment securities held to maturity, net	2,149,434	2,205,083
Investment securities held to maturity, fair value	2,247,553	2,276,465
Investment securities available for sale	2,928,787	3,262,586
Equity securities with readily determinable fair values, Fair Value	2,000	2,000
Equity Securities without Readily Determinable Fair Value, Amount	13,000	13,000
Investment securities gains (losses), net	15,063	15,090
FHLB and Federal Reserve Bank stocks	222,922	227,347
Loans, net	24,027,841	22,620,068
Financial liabilities
Short-term funding	166,654	465,113
Other long-term funding	549,644	549,343
FHLB advances	3,214,194	3,180,967
Letters of Credit Outstanding, Amount	265,000	278,000
Fair Value, Inputs, Level 1
Financial assets
Cash and due from banks	480,337	373,380
Cash and due from banks, Fair Value	480,337	373,380
Interest-bearing deposits in other financial institutions	176,440	207,624
Interest-bearing deposits in other financial institutions, fair value	176,440	207,624
Federal funds sold and securities purchased under agreements to resell	22,455	7,740
Federal funds sold and securities purchased under agreements to resell, fair value	22,455	7,740
Investment securities held to maturity, net	999	999
Investment securities held to maturity, fair value	1,041	1,018
Equity securities with readily determinable fair value, Carrying Amount	1,618	1,646
Equity securities with readily determinable fair values, Fair Value	1,618	1,646
Fair Value, Inputs, Level 2
Financial assets
Investment securities held to maturity, net	2,148,373	2,204,084
Investment securities held to maturity, fair value	2,246,451	2,275,447
Investment securities available for sale	2,928,787	3,262,586
Investment securities available for sale, fair value	2,928,787	3,262,586
FHLB and Federal Reserve Bank stocks	222,922	227,347
FHLB and Federal Reserve Bank stocks, fair value	222,922	227,347
Residential Loans Receivable Held-for-sale, Net, Not Part of Disposal Group	366,330	136,280
Residential Held-for-sale, Fair Value Disclosure	366,330	136,280
Commercial loans held for sale	0	15,000
Commercial Loans Held-for-sale, Fair Value Disclosure	0	15,000
Bank and Corporate Owned Life Insurance	674,026	671,948
Bank owned life insurance, fair value	674,026	671,948
Financial liabilities
Brokered CDs and other time deposits	2,633,345	2,622,803
Brokered CDs and other time deposits, fair value	2,650,937	2,622,803
Short-term funding	166,654	465,113
Short-term funding, fair value	166,654	465,113
Other long-term funding	549,644	549,343
Long-term funding, fair value	606,233	588,774
FHLB advances	3,214,194	3,180,967
Advances, Fair Value Disclosure	3,394,222	3,207,793
Standby letters of credit	2,644	2,710
Standby letters of credit, fair value	2,644	2,710
Fair Value, Inputs, Level 2 | Other Assets [Member]
Financial assets
Derivative Asset	298,958	101,778
Derivatives (trading and other assets), fair value	298,958	101,778
Fair Value, Inputs, Level 2 | Other Liabilities [Member]
Financial liabilities
Derivatives (trading liabilities)	107,255	36,745
Derivatives (trading and other liabilities), fair value	107,255	36,745
Fair Value, Inputs, Level 3
Financial assets
Equity Securities without Readily Determinable Fair Value, Amount	13,444	13,444
Investment securities gains (losses), net	13,444	13,444
Loans, net	24,027,841	22,620,068
Loans, net, fair value	24,072,251	22,399,621
Derivative Asset	12,454	2,527
Derivatives (trading and other assets), fair value	12,454	2,527
Financial liabilities
Noninterest-bearing demand, savings, interest-bearing demand, and money market accounts	23,028,235	21,156,261
Noninterest-bearing demand, savings, interest-bearing demand, and money market deposits, fair value	23,028,235	21,156,261
Derivatives (trading liabilities)	10,972	710
Derivatives (trading and other liabilities), fair value	$ 10,972	$ 710

Fair Value Measurements (Detail

Fair Value Measurements (Details Textuals) - shares	3 Months Ended
	Mar. 31, 2020	Jun. 30, 2019
Fair Value Measurements (Textuals) [Abstract]
Fair Value Inputs Closing Ratio	83.00%
Visa Restricted Stock Owned at Fair Value	77,000
Visa Restricted Stock Donated		42,039
Visa Restricted Stock Owned at Zero Cost	996
Visa Restricted Stock Owned. Total	77,996
Visa Class A Shares - Current Conversion from Class B	126,572

Retirement Plans, Components of

Retirement Plans, Components of Net Periodic Benefit Cost for the Pension and Postretirement Tables (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
RAP
Net period benefit cost for the pension and postretirement plans
Service cost	$ 2,165	$ 1,925
Interest cost	2,008	2,413
Expected return on plan assets	(6,405)	(6,075)
Amortization of prior service cost	(19)	(19)
Amortization of actuarial loss (gain)	808	65
Total net periodic pension cost	(1,444)	(1,691)
Postretirement Plan
Net period benefit cost for the pension and postretirement plans
Interest cost	20	26
Amortization of prior service cost	(19)	(19)
Amortization of actuarial loss (gain)	0	(1)
Total net periodic pension cost	$ 1	$ 6

Retirement Plans (Details Textu

Retirement Plans (Details Textuals) (Details) - USD ($) $ in Millions	Feb. 14, 2020	Jun. 14, 2019	Mar. 31, 2020	Mar. 31, 2019
Huntington National Bank
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Effective Date of Acquisition		Jun. 14, 2019
First Staunton Bancshares [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Effective Date of Acquisition	Feb. 14, 2020
RAP
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer			$ 0	$ 0
Defined Benefit Plan, Description			The Corporation has a noncontributory defined benefit retirement account plan, the RAP, covering substantially all employees who meet participation requirements. The benefits are based primarily on years of service and the employee’s compensation paid. Employees of acquired entities generally participate in the RAP after consummation of the business combinations. Any retirement plans of acquired entities are typically merged into the RAP after completion of the mergers, and credit is usually given to employees for years of service at the acquired institution for vesting and eligibility purposes.

Segment Reporting (Details)

Segment Reporting (Details) - USD ($)		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Segment Income Statement Data Abstract
Net interest income		$ 202,942,000	$ 215,547,000
Net intersegment interest income (expense)		0	0
Segment net interest income		202,942,000	215,547,000
Noninterest income		98,306,000	91,202,000
Total revenue		301,248,000	306,749,000
Credit provision		53,001,000	6,000,000
Noninterest expense		192,191,000	191,671,000
Income (loss) before income taxes		56,056,000	109,078,000
Income tax expense (benefit)		10,219,000	22,392,000
Net income		45,838,000	86,686,000
Segment Balance Sheet Data
Allocated goodwill		1,191,388,000	1,168,944,000
Operating Segments | Corporate and Commercial Specialty
Segment Income Statement Data Abstract
Net interest income		113,478,000	124,294,000
Net intersegment interest income (expense)		(12,336,000)	(19,927,000)
Segment net interest income		101,141,000	104,368,000
Noninterest income		34,802,000	27,394,000
Total revenue		135,943,000	131,762,000
Credit provision		13,174,000	13,833,000
Noninterest expense		52,598,000	56,340,000
Income (loss) before income taxes		70,172,000	61,589,000
Income tax expense (benefit)		13,126,000	11,920,000
Net income		57,046,000	49,669,000
Segment Balance Sheet Data
Allocated goodwill		530,144,000	528,832,000
Operating Segments | Community, Consumer, and Business
Segment Income Statement Data Abstract
Net interest income		74,927,000	79,686,000
Net intersegment interest income (expense)		18,685,000	20,747,000
Segment net interest income		93,612,000	100,433,000
Noninterest income		57,650,000	58,275,000
Total revenue		151,262,000	158,708,000
Credit provision		5,108,000	4,685,000
Noninterest expense		116,431,000	112,917,000
Income (loss) before income taxes		29,723,000	41,106,000
Income tax expense (benefit)		6,242,000	8,632,000
Net income		23,481,000	32,473,000
Segment Balance Sheet Data
Allocated goodwill		661,244,000	640,112,000
Operating Segments | Risk Management and Shared Services
Segment Income Statement Data Abstract
Net interest income		14,537,000	11,567,000
Net intersegment interest income (expense)		(6,349,000)	(821,000)
Segment net interest income		8,188,000	10,746,000
Noninterest income		5,854,000	5,533,000
Total revenue		14,042,000	16,280,000
Credit provision		34,719,000	(12,518,000)
Noninterest expense		23,162,000	22,414,000
Income (loss) before income taxes		(43,838,000)	6,384,000
Income tax expense (benefit)		(9,149,000)	1,840,000
Net income		(34,689,000)	4,543,000
Segment Balance Sheet Data
Allocated goodwill		0	0
Business Combination, Acquisition Related Costs	[1]	$ 1,721,000	$ 632,000
[1]	(b) Includes Huntington branch and First Staunton acquisition related costs only.

Segment Reporting (Details Text

Segment Reporting (Details Textuals)	3 Months Ended
	Mar. 31, 2020segment
Segment Reporting [Abstract]
Number of Reportable Segments	3
Description of Effect on Previously Reported Segment Information for Change in Composition of Reportable Segments	During the first quarter of 2020, the Corporation reassigned goodwill of approximately $4 million to the Corporate and Commercial Specialty segment from the Community, Consumer and Business segment as a result of a reorganization of the investment and fiduciary businesses. The goodwill reassigned was attributable to the Corporation's acquisition of Whitnell & Co. in 2017. Also effective in the first quarter of 2020, the marketing business unit, formerly part of the Risk Management and Shared Services segment, was reorganized under the Community, Consumer and Business segment.

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	$ (33,183)
Investment securities losses (gains), net	(80)	$ 0
Personnel expense	(114,200)	(120,050)
Interest income	(556)	(69)
Total other comprehensive income (loss)	16,209	21,597
Ending Balance	(16,974)
Investment Securities Available For Sale
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	3,989	(75,643)
Other comprehensive income (loss) before reclassifications	26,419	30,490
Investment securities losses (gains), net	(6,118)	(1,680)
Personnel expense	0	0
Other expense	0	0
Interest income	556	69
Income tax (expense) benefit	(5,225)	(7,301)
Total other comprehensive income (loss)	15,632	21,578
Ending Balance	19,620	(54,065)
Defined Benefit Pension and Postretirement Obligations
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(37,172)	(49,330)
Other comprehensive income (loss) before reclassifications	0	0
Investment securities losses (gains), net	0	0
Personnel expense	(38)	(38)
Other expense	808	64
Interest income	0	0
Income tax (expense) benefit	(193)	(7)
Total other comprehensive income (loss)	577	20
Ending Balance	(36,595)	(49,310)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(33,183)	(124,972)
Other comprehensive income (loss) before reclassifications	26,419	30,490
Investment securities losses (gains), net	(6,118)	(1,680)
Personnel expense	(38)	(38)
Other expense	808	64
Interest income	556	69
Income tax (expense) benefit	(5,418)	(7,308)
Total other comprehensive income (loss)	16,209	21,597
Ending Balance	$ (16,974)	$ (103,375)

Revenue from Contracts with C_3

Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of Topic 606)		$ 71,348	$ 72,738
Noninterest Income (out-of-scope of Topic 606)		26,958	18,465
Total noninterest income		98,306	91,202
Insurance commissions and fees
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of Topic 606)		22,608	25,464
Wealth management fees(a)
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of Topic 606)	[1]	20,816	20,180
Service charges and deposit account fees
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of Topic 606)		15,222	15,115
Card-based fees(b)
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of Topic 606)		9,607	9,295
Other revenue
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of Topic 606)		3,096	2,684
Corporate and Commercial Specialty
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of Topic 606)		20,736	19,449
Noninterest Income (out-of-scope of Topic 606)		14,066	7,945
Corporate and Commercial Specialty | Insurance commissions and fees
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of Topic 606)		76	125
Corporate and Commercial Specialty | Wealth management fees(a)
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of Topic 606)		15,806	15,099
Corporate and Commercial Specialty | Service charges and deposit account fees
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of Topic 606)		3,551	3,498
Corporate and Commercial Specialty | Card-based fees(b)
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of Topic 606)		515	434
Corporate and Commercial Specialty | Other revenue
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of Topic 606)		788	293
Community, Consumer, and Business
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of Topic 606)		50,535	53,098
Noninterest Income (out-of-scope of Topic 606)		7,115	5,177
Community, Consumer, and Business | Insurance commissions and fees
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of Topic 606)		22,529	25,336
Community, Consumer, and Business | Wealth management fees(a)
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of Topic 606)		5,010	5,080
Community, Consumer, and Business | Service charges and deposit account fees
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of Topic 606)		11,665	11,599
Community, Consumer, and Business | Card-based fees(b)
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of Topic 606)		9,045	8,812
Community, Consumer, and Business | Other revenue
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of Topic 606)		2,286	2,271
Risk Management and Shared Services
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of Topic 606)		77	191
Noninterest Income (out-of-scope of Topic 606)		5,777	5,342
Risk Management and Shared Services | Insurance commissions and fees
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of Topic 606)		3	3
Risk Management and Shared Services | Wealth management fees(a)
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of Topic 606)		0	0
Risk Management and Shared Services | Service charges and deposit account fees
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of Topic 606)		5	19
Risk Management and Shared Services | Card-based fees(b)
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of Topic 606)		47	49
Risk Management and Shared Services | Other revenue
Disaggregation of Revenue [Line Items]
Noninterest Income (in-scope of Topic 606)		23	120
Operating Segments [Member] | Corporate and Commercial Specialty
Disaggregation of Revenue [Line Items]
Total noninterest income		34,802	27,394
Operating Segments [Member] | Community, Consumer, and Business
Disaggregation of Revenue [Line Items]
Total noninterest income		57,650	58,275
Operating Segments [Member] | Risk Management and Shared Services
Disaggregation of Revenue [Line Items]
Total noninterest income		$ 5,854	$ 5,533
[1]	(a) Includes trust, asset management, brokerage, and annuity fees.

Leases Lease, Cost and Cash Flo

Leases Lease, Cost and Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Leases [Abstract]
Operating Lease Costs	$ 2,623	$ 2,905
Finance Lease Costs	36	0
Operating Lease Cash Flows	2,731	2,809
Finance Lease Cash Flows	$ 21	$ 0

Leases Components of Lease Expe

Leases Components of Lease Expense (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease right-of-use asset	$ 43,321	$ 45,381
Finance lease right-of-use asset	2,174	2,188
Operating lease liability	47,136	49,292
Finance Lease, Liability	$ 2,210	$ 2,209

Leases Operating Lease Informat

Leases Operating Lease Information (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Liability, Payments, Due	$ 53,046	$ 55,580
Operating Lease, Weighted Average Remaining Lease Term	6 years 8 months 15 days	6 years 9 months 29 days
Operating Lease, Weighted Average Discount Rate, Percent	3.33%	3.32%
Finance Lease, Liability, Payment, Due	$ 4,805	$ 4,827
Finance Lease, Weighted Average Remaining Lease Term	39 years 5 months 1 day	39 years 8 months 1 day
Finance Lease, Weighted Average Discount Rate, Percent	3.99%	3.99%
Equipment
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Liability, Payments, Due	$ 37	$ 46
Operating Lease, Weighted Average Remaining Lease Term	9 months 21 days	9 months 29 days
Operating Lease, Weighted Average Discount Rate, Percent	2.72%	2.72%
Retail and corporate offices
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Liability, Payments, Due	$ 46,476	$ 48,940
Operating Lease, Weighted Average Remaining Lease Term	6 years 4 months 13 days	6 years 5 months 26 days
Operating Lease, Weighted Average Discount Rate, Percent	3.34%	3.34%
Land
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Liability, Payments, Due	$ 6,533	$ 6,594
Operating Lease, Weighted Average Remaining Lease Term	9 years 3 months 25 days	9 years 6 months 25 days
Operating Lease, Weighted Average Discount Rate, Percent	3.20%	3.21%
Finance Lease, Liability, Payment, Due	$ 4,805	$ 4,827
Finance Lease, Weighted Average Remaining Lease Term	39 years 5 months 1 day	39 years 8 months 1 day
Finance Lease, Weighted Average Discount Rate, Percent	3.99%	3.99%

Leases Amortization of Operatin

Leases Amortization of Operating Lease Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Operating Leases
Nine Months Ending December 31, 2020	$ 7,992
2021	10,203
2022	7,914
2023	5,696
2024	5,058
Beyond 2024	16,183
Total lease payments	53,046	$ 55,580
Less: interest	5,910
Present value of lease payments	47,136	49,292
Finance Leases
Nine Months Ending December 31, 2020	64
2021	85
2022	85
2023	85
2024	88
Beyond 2024	4,398
Total lease payments	4,805	4,827
Less: interest	2,595
Finance Lease, Liability	2,210	$ 2,209
Total Leases [Line Items]
Nine Months Ending December 31, 2020	8,056
2021	10,288
2022	7,999
2023	5,781
2024	5,147
Beyond 2024	20,581
Total lease payments	57,851
Less: interest	8,506
Present value of lease payments	$ 49,345

Leases (Details Textuals)

Leases (Details Textuals) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Additional operating leases	$ 18	$ 16
Lessee, Finance Lease, Lease Not yet Commenced, Liability	$ 2	$ 2
Minimum
Lessee, Lease, Description [Line Items]
Operating lease terms	1 year
Additional operating lease terms	2 years
Maximum
Lessee, Lease, Description [Line Items]
Operating lease terms	43 years
Additional operating lease terms	6 years