Associated Banc-Corp (ASB) 10-Q 30 Jul 19 2019 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2019	Jul. 26, 2019
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2019
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		162,166,503
Entity Central Index Key	0000007789
Amendment Flag	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
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		Jun. 30, 2019	Dec. 31, 2018
Assets
Cash and due from banks		$ 382,985	$ 507,187
Interest-bearing deposits in other financial institutions		172,708	221,226
Federal funds sold and securities purchased under agreements to resell		1,385	148,285
Investment securities held to maturity, at amortized cost		2,806,064	2,740,511
Investment securities available for sale, at fair value		3,283,456	3,946,941
Equity securities		15,066	1,568
Federal Home Loan Bank and Federal Reserve Bank stocks, at cost		202,758	250,534
Loans	[1]	23,249,967	22,940,429
Allowance for loan losses		(233,659)	(238,023)
Loans, net		23,016,308	22,702,406
Bank and corporate owned life insurance		668,638	663,203
Investment in unconsolidated subsidiaries		222,812	161,181
Premises and equipment, net(a)	[2]	432,058	363,225
Goodwill		1,176,019	1,169,023
Mortgage servicing rights, net		66,175	68,193
Other intangible assets, net		93,915	75,836
Other assets(a)	[2]	591,976	549,274
Total assets		33,272,628	33,647,859
Liabilities and Stockholders' Equity
Noninterest-bearing demand deposits		5,354,987	5,698,530
Interest-bearing deposits		19,919,235	19,198,863
Total deposits		25,274,222	24,897,393
Federal funds purchased and securities sold under agreements to repurchase		83,195	111,651
Commercial paper		28,787	45,423
FHLB advances		2,742,941	3,574,371
Other long-term funding		796,403	795,611
Accrued expenses and other liabilities		447,286	442,522
Total liabilities		29,372,835	29,866,971
Stockholders’ Equity
Preferred equity		256,716	256,716
Common stock		1,752	1,752
Surplus		1,695,715	1,712,615
Retained earnings		2,288,909	2,181,414
Accumulated other comprehensive income (loss)		(59,063)	(124,972)
Treasury stock, at cost		(284,235)	(246,638)
Total common equity		3,643,077	3,524,171
Total stockholders’ equity		3,899,794	3,780,888
Total liabilities and stockholders’ equity		$ 33,272,628	$ 33,647,859
Preferred shares issued		264,458	264,458
Preferred shares authorized (par value $1.00 per share)		750,000	750,000
Common shares issued		175,216,409	175,216,409
Common shares authorized (par value $0.01 per share)		250,000,000	250,000,000
Treasury shares of common stock		12,554,448	10,775,938
Residential loans held for sale
Assets
Loans Receivable Held-for-sale, Amount		$ 129,303	$ 64,321
Loans		8,277,479	8,277,712
Commercial loans held for sale
Assets
Loans Receivable Held-for-sale, Amount		11,000	14,943
Loans		$ 13,696,210	$ 13,405,072
[1]	(a) Includes $2 million and $5 million of purchased credit-impaired loans at June 30, 2019 and December 31, 2018 , respectively.
[2]	(a) During the second quarter of 2019, the Corporation reclassified operating leases from Other Assets to Premises and Equipment.

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Preferred shares, par value	$ 1	$ 1
Common shares, par value	$ 0.01	$ 0.01

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Interest income
Interest and fees on loans		$ 260,784	$ 246,646	$ 519,637	$ 466,680
Interest and dividends on investment securities
Taxable		26,710	30,623	55,764	60,727
Tax-exempt		14,643	10,783	28,459	20,000
Other interest		3,995	3,153	8,221	5,330
Total interest income		306,133	291,205	612,081	552,737
Interest expense
Interest on deposits		67,050	38,431	129,823	71,843
Interest on federal funds purchased and securities sold under agreements to repurchase		286	538	913	1,060
Interest on other short-term funding		37	51	88	111
Interest on FHLB advances		17,744	21,279	37,298	34,402
Interest on long-term funding		7,396	4,544	14,792	9,088
Total interest expense		92,513	64,843	182,914	116,504
Net interest income		213,619	226,362	429,167	436,233
Provision for credit losses		8,000	4,000	14,000	4,000
Net interest income after provision for credit losses		205,619	222,362	415,167	432,233
Noninterest income
Noninterest Income In Scope of Topic 606		71,122	72,825	143,660	145,553
Capital markets, net		4,726	4,783	7,916	10,089
Mortgage banking, net		9,466	6,258	14,178	12,628
Bank and corporate owned life insurance		3,352	3,978	7,144	7,165
Asset gains (losses), net(b)	[1]	871	2,497	1,438	2,390
Investment securities gains (losses), net		463	(2,015)	2,143	(2,015)
Other		2,547	2,235	5,807	4,727
Total noninterest income		95,837	92,842	187,040	183,222
Noninterest expense
Personnel		123,228	123,980	243,279	241,665
Technology		20,114	19,452	39,126	37,167
Occupancy		13,830	15,071	30,302	30,428
Business development and advertising		6,658	7,067	13,293	13,760
Equipment		5,577	5,953	11,245	11,509
Legal and professional		4,668	6,284	8,619	11,697
Card issuance costs		1,290	2,412	2,266	4,744
Loan costs		952	761	2,316	1,733
Foreclosure / OREO expense, net		924	1,021	1,491	1,744
FDIC assessment		4,500	8,250	8,250	16,500
Other intangible amortization		2,324	2,168	4,551	3,693
Other		9,979	11,732	20,346	21,873
Total noninterest expense		197,779	211,258	389,450	424,223
Income before income taxes		103,678	103,947	212,756	191,232
Income tax expense		19,017	14,754	41,409	32,583
Net income		84,661	89,192	171,347	158,648
Preferred stock dividends		3,801	2,329	7,601	4,668
Net income available to common equity		$ 80,860	$ 86,863	$ 163,746	$ 153,980
Earnings per common share
Basic		$ 0.49	$ 0.51	$ 1	$ 0.92
Diluted		$ 0.49	$ 0.50	$ 0.99	$ 0.90
Average common shares outstanding
Basic		162,180	170,633	163,049	167,096
Diluted		163,672	173,409	164,518	169,920
Insurance commissions and fees
Noninterest income
Noninterest Income In Scope of Topic 606		$ 22,985	$ 23,996	$ 48,449	$ 46,644
Wealth management fees(a)
Noninterest income
Noninterest Income In Scope of Topic 606	[2]	20,691	20,333	40,870	40,975
Service charges on deposit account fees
Noninterest income
Noninterest Income In Scope of Topic 606		15,426	16,390	30,542	32,810
Card-based fees
Noninterest income
Noninterest Income In Scope of Topic 606	[3]	10,177	10,155	19,472	19,628
Service charges and account fees		10,131	10,115	19,392	19,557
Other fee-based revenue
Noninterest income
Noninterest Income In Scope of Topic 606		1,843	1,952	4,327	5,496
Service charges and account fees		5,178	4,272	9,161	8,252
Operating Segments [Member] | Risk Management and Shared Serivies [Member]
Interest expense
Net interest income		13,097	13,959	24,664	33,000
Provision for credit losses		(10,283)	(12,006)	(22,801)	(27,569)
Noninterest income
Total noninterest income		3,185	2,399	8,718	6,059
Noninterest expense
Acquisition related costs(c)	[4]	3,734	7,107	4,366	27,712
Total noninterest expense	[5]	19,343	30,929	41,236	77,498
Income before income taxes		1,697	(12,111)	8,602	(29,087)
Income tax expense		(1,387)	(8,661)	560	(11,806)
Net income		$ 3,084	$ (3,450)	$ 8,042	$ (17,280)
Huntington National Bank
Average common shares outstanding
Related acquisition asset losses net of asset gains		less than $1 million		less than $1 million
Bank Mutual
Average common shares outstanding
Related acquisition asset losses net of asset gains			approximately $1 million		approximately $1 million
[1]	Both the three and six months ended June 30, 2019 include less than $1 million of Huntington related asset losses; Both the three and six months ended June 30, 2018 include approximately $1 million of Bank Mutual acquisition related asset losses net of asset gains.
[2]	Includes trust, asset management, brokerage, and annuity fees.
[3]	(a) Certain card-based fees are out-of-scope of Topic 606.
[4]	Includes Bank Mutual and Huntington branch acquisition related costs only.
[5]	(a) For the three months ended June 30, 2019 and 2018 , the Risk Management and Shared Services segment includes approximately $4 million and $7 million , respectively, of acquisition related noninterest expense. For the six months ended June 30, 2019 and 2018 , the Risk Management and Shared Services segment includes approximately $4 million and $28 million , respectively, of acquisition related noninterest expense.

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 84,661	$ 89,192	$ 171,347	$ 158,648
Investment securities available for sale
Net unrealized gains (losses)	59,476	(18,919)	89,966	(60,754)
Amortization of net unrealized gain (loss) on available for sale securities transferred to held to maturity securities	218	(335)	288	(632)
Reclassification adjustment for net losses (gains) realized in net income(a)	(463)	2,015	(2,143)	2,015
Reclassification from OCI due to change in accounting principle	0	0	0	(84)
Reclassification of certain tax effects from OCI	0	0	0	(8,419)
Income tax (expense) benefit	(14,940)	4,705	(22,242)	15,340
Other comprehensive income (loss) on investment securities available for sale	44,292	(12,533)	65,869	(52,533)
Defined benefit pension and postretirement obligations
Amortization of prior service cost	(38)	(38)	(75)	(76)
Amortization of actuarial loss (gain)	64	465	128	929
Reclassification of certain tax effects from OCI	0	0	0	(5,235)
Income tax (expense) benefit	(7)	(109)	(13)	(216)
Other comprehensive income (loss) on pension and postretirement obligations	20	318	40	(4,597)
Total other comprehensive income (loss)	44,311	(12,215)	65,909	(57,130)
Comprehensive income	$ 128,972	$ 76,977	$ 237,256	$ 101,518

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($)	Total		Preferred Equity	Common Stock	Surplus		Retained Earnings		Retained EarningsSeries C Preferred Stock	Retained EarningsSeries D Preferred Stock	Retained EarningsSeries E Preferred Stock	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Beginning balance at Dec. 31, 2017	$ 3,237,443,000		$ 159,929,000	$ 1,618,000	$ 1,338,722,000		$ 1,934,696,000					$ (62,758,000)	$ (134,764,000)
Comprehensive income
Net income	69,456,000		0	0	0		69,456,000					0	0
Other comprehensive income (loss)	(31,177,000)		0	0	0		0					(31,177,000)	0
Adoption of new accounting standards	(13,738,000)		0	0	0		0					(13,738,000)	0
Comprehensive income	24,541,000
Common stock issued
Stock-based compensation plans, net	10,691,000		0	0	(7,665,000)		20,136,000					0	(1,780,000)
Acquisition of Bank Mutual	481,688,000		0	134,000	390,258,000		0					0	91,296,000
Purchase of common stock returned to authorized but unissued	(26,480,000)		0	(11,000)	(26,469,000)		0					0	0
Purchase of treasury stock	(5,240,000)		0	0	0		0					0	(5,240,000)
Cash dividends:
Common stock ($0.15 per share in 2018 and $0.17 per share in 2019)	(25,710,000)		0	0	0		(25,710,000)					0	0
Preferred stock	(2,339,000)	[1]	0	0	0		(2,339,000)	[1]				0	0
Purchase of preferred stock	(78,000)		(76,000)	0	0		(2,000)					0	0
Stock-based compensation expense, net	3,675,000		0	0	3,675,000		0					0	0
Tax Act reclassification	13,654,000		0	0	0		13,654,000					0	0
Change in accounting principle	84,000		0	0	0		84,000					0	0
Other	771,000		0	0	0		771,000					0	0
Ending balance at Mar. 31, 2018	3,712,699,000		159,853,000	1,741,000	1,698,521,000		2,010,746,000					(107,673,000)	(50,488,000)
Beginning balance at Dec. 31, 2017	3,237,443,000		159,929,000	1,618,000	1,338,722,000		1,934,696,000					(62,758,000)	(134,764,000)
Comprehensive income
Net income	158,648,000
Other comprehensive income (loss)	(57,130,000)											(57,130,000)
Comprehensive income	101,518,000
Cash dividends:
Change in accounting principle												(84,000)
Ending balance at Jun. 30, 2018	3,770,244,000		159,401,000	1,751,000	1,704,587,000		2,070,872,000					(119,888,000)	(46,479,000)
Beginning balance at Mar. 31, 2018	3,712,699,000		159,853,000	1,741,000	1,698,521,000		2,010,746,000					(107,673,000)	(50,488,000)
Comprehensive income
Net income	89,192,000		0	0	0		89,192,000					0	0
Other comprehensive income (loss)	(12,215,000)		0	0	0		0					(12,215,000)	0
Comprehensive income	76,977,000
Common stock issued
Stock-based compensation plans, net	5,456,000		0	0	1,455,000	[2]	(485,000)	[2]				0	4,486,000	[2]
Acquisition of Bank Mutual	6,720,000		0	3,000	6,717,000		0					0	0
Purchase of common stock returned to authorized but unissued	(6,595,000)		0	(3,000)	(6,592,000)		0					0	0
Purchase of treasury stock	(477,000)		0	0	0		0					0	(477,000)
Cash dividends:
Common stock ($0.15 per share in 2018 and $0.17 per share in 2019)	(26,107,000)		0	0	0		(26,107,000)					0	0
Preferred stock	(2,329,000)	[1]	0	0	0		(2,329,000)	[1]	$ 0.3828125	$ 0.3359375		0	0
Common stock warrants exercised	0		0	10,000	(10,000)		0					0	0
Purchase of preferred stock	(459,000)		(452,000)	0	0		(6,000)					0	0
Stock-based compensation expense, net	4,497,000		0	0	4,497,000		0					0	0
Other	(139,000)		0	0	0		(139,000)					0	0
Ending balance at Jun. 30, 2018	3,770,244,000		159,401,000	1,751,000	1,704,587,000		2,070,872,000					(119,888,000)	(46,479,000)
Beginning balance at Dec. 31, 2018	3,780,888,000		256,716,000	1,752,000	1,712,615,000		2,181,414,000					(124,972,000)	(246,638,000)
Comprehensive income
Net income	86,686,000		0	0	0		86,686,000					0	0
Other comprehensive income (loss)	21,597,000		0	0	0		0					21,597,000	0
Comprehensive income	108,283,000
Common stock issued
Stock-based compensation plans, net	7,045,000		0	0	(32,220,000)		0					0	39,265,000
Purchase of treasury stock	(37,467,000)		0	0	0		0					0	(37,467,000)
Cash dividends:
Common stock ($0.15 per share in 2018 and $0.17 per share in 2019)	(28,183,000)		0	0	0		(28,183,000)					0	0
Preferred stock	(3,801,000)	[3]	0	0	0		(3,801,000)	[3]				0	0
Stock-based compensation expense, net	9,397,000		0	0	9,397,000		0					0	0
Other	(293,000)		0	0	0		(293,000)					0	0
Ending balance at Mar. 31, 2019	3,835,870,000		256,716,000	1,752,000	1,689,792,000		2,235,824,000					(103,375,000)	(244,840,000)
Beginning balance at Dec. 31, 2018	3,780,888,000		256,716,000	1,752,000	1,712,615,000		2,181,414,000					(124,972,000)	(246,638,000)
Comprehensive income
Net income	171,347,000
Other comprehensive income (loss)	65,909,000											65,909,000
Comprehensive income	237,256,000
Ending balance at Jun. 30, 2019	3,899,794,000		256,716,000	1,752,000	1,695,715,000		2,288,909,000					(59,063,000)	(284,235,000)
Cash dividends:
Increase Adjustment Options, RSA and RSU					901,000								484,000
Decrease Adjustment Options RSA and RSU							1,000,000
Beginning balance at Mar. 31, 2019	3,835,870,000		256,716,000	1,752,000	1,689,792,000		2,235,824,000					(103,375,000)	(244,840,000)
Comprehensive income
Net income	84,661,000		0	0	0		84,661,000					0	0
Other comprehensive income (loss)	44,311,000		0	0	0		0					44,311,000	0
Comprehensive income	128,972,000
Common stock issued
Stock-based compensation plans, net	827,000		0	0	(211,000)		0					0	1,038,000
Purchase of treasury stock	(40,433,000)		0	0	0		0					0	(40,433,000)
Cash dividends:
Common stock ($0.15 per share in 2018 and $0.17 per share in 2019)	(27,776,000)		0	0	0		(27,776,000)					0	0
Preferred stock	(3,801,000)	[3]	0	0	0		(3,801,000)	[3]	$ 0.3828125	$ 0.3359375	$ 0.3671875	0	0
Stock-based compensation expense, net	6,134,000		0	0	6,134,000		0					0	0
Ending balance at Jun. 30, 2019	$ 3,899,794,000		$ 256,716,000	$ 1,752,000	$ 1,695,715,000		$ 2,288,909,000					$ (59,063,000)	$ (284,235,000)
[1]	(b) Series C, $0.3828125 per share and Series D, $0.3359375 per share.
[2]	(a) As previously disclosed in Associated Banc-Corp's 2018 Annual Report on Form 10-K, an adjustment was made to the June 30, 2018 stockholders' equity balances related to the grant and vesting of options, restricted stock awards, and restricted stock units awarded. This adjustment increased Surplus by $901 thousand , decreased Retained Earnings $1 million , and increased Treasury Stock $484 thousand . The reclassification had no impact on earnings, expenses, or total stockholders' equity.
[3]	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
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018
Common Stock, Dividends, Per Share, Cash Paid	$ 0.17	$ 0.17	$ 0.15	$ 0.15

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands		3 Months Ended				6 Months Ended		12 Months Ended
		Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Cash Flow From Operating Activities
Net income		$ 84,661	$ 86,686	$ 89,192	$ 69,456	$ 171,347	$ 158,648
Adjustments to reconcile net income to net cash provided by operating activities
Provision for credit losses		8,000		4,000		14,000	4,000
Depreciation and amortization						28,810	24,249
Addition to (recovery of) valuation allowance on mortgage servicing rights, net						146	(607)
Amortization of mortgage servicing rights						5,448	4,649
Amortization of other intangible assets		2,324		2,168		4,551	3,693
Amortization and accretion on earning assets, funding, and other, net						14,495	423
Net amortization of tax credit investments						11,180	9,770
Losses (gains) on sales of investment securities, net						(2,143)	2,015
Asset (gains) losses, net	[1]	(871)		(2,497)		(1,438)	(2,390)
(Gain) loss on mortgage banking activities, net						(11,172)	261
Mortgage loans originated and acquired for sale						(459,181)	(516,285)
Proceeds from sales of mortgage loans held for sale						432,099	482,080
Pension Contribution						0	(31,371)
Changes in certain assets and liabilities
(Increase) decrease in interest receivable						(11,738)	(14,569)
Increase (decrease) in interest payable						3,572	3,775
Increase (decrease) in expense payable						(35,516)	20,631
Increase (decrease) in cash collateral						(38,777)	(63,929)
Increase (decrease) in net derivative position						(61,656)	(34,214)
Net change in other assets and other liabilities						6,444	65,705
Net cash provided by (used in) operating activities						70,470	116,534
Cash Flow From Investing Activities
Net increase in loans						(244,230)	(338,781)
Purchases of:
Available for sale securities						(460,124)	(655,949)
Held to maturity securities						(169,775)	(429,964)
Federal Home Loan Bank and Federal Reserve Bank stocks						(178,363)	(238,190)
Premises, equipment, and software, net of disposals						(30,608)	(23,932)
Proceeds from
Sales of available for sale securities						934,228	493,060
Sale of Federal Home Loan Bank and Federal Reserve Bank stocks						226,139	174,506
Prepayments, calls, and maturities of available for sale investment securities						262,872	330,517
Prepayments, calls, and maturities of held to maturity investment securities						100,603	121,612
Sales, prepayments, calls, and maturities of other assets						7,064	9,640
Net change in tax credit and alternative investments						(30,814)	(18,842)
Net cash (paid) received in acquisition						551,250	59,472
Net cash provided by (used in) investing activities						968,242	(516,851)
Cash Flow From Financing Activities
Net increase (decrease) in deposits						(348,344)	(810,598)
Net increase (decrease) in short-term funding						(45,091)	(135,757)
Net increase (decrease) in short-term FHLB advances						(820,000)	(260,162)
Repayment of long-term FHLB advances						(762,880)	(400,000)
Proceeds from long-term FHLB advances						751,573	1,841,965
Proceeds from issuance of common stock for stock-based compensation plans						7,872	16,147
Purchase of preferred shares						0	(646)
Purchase of common stock returned to authorized but unissued						0	(33,075)
Purchase of treasury stock						(77,900)	(5,717)
Cash dividends on common stock						(55,959)	(51,817)
Cash dividends on preferred stock						(7,601)	(4,668)
Net cash provided by (used in) financing activities						(1,358,331)	155,672
Net increase (decrease) in cash, cash equivalents, and restricted cash						(319,619)	(244,645)
Cash, cash equivalents, and restricted cash at beginning of period			876,698		716,018	876,698	716,018	$ 716,018
Cash, cash equivalents, and restricted cash at end of period		557,078		471,373		557,078	471,373	876,698
Supplemental disclosures of cash flow information
Cash paid for interest						178,550	112,392
Cash paid for (received from) income and franchise taxes						21,909	12,674
Loans and bank premises transferred to other real estate owned						5,406	21,299
Capitalized mortgage servicing rights						3,575	4,502
Loans transferred into held for sale from portfolio, net						30,597	12,709
Unsettled trades to purchase securities						136	15,339
Acquisition
Fair value of assets acquired, including cash and cash equivalents									$ 696,013	$ 2,569,700
Fair value ascribed to goodwill and intangible assets									29,626	258,885
Fair value of liabilities assumed									725,719	2,828,448
Equity issued in (adjustments related to) acquisition						(79)	137
Restricted Cash and Cash Equivalents
Cash and cash equivalents									403,693	385,957
Restricted cash									153,385	85,416
Total cash, cash equivalents, and restricted cash shown in the statement of cash flows		$ 557,078	$ 876,698	$ 471,373	$ 716,018	$ 876,698	$ 716,018	$ 876,698	$ 557,078	$ 471,373
[1]	Both the three and six months ended June 30, 2019 include less than $1 million of Huntington related asset losses; Both the three and six months ended June 30, 2018 include approximately $1 million of Bank Mutual acquisition related asset losses net of asset gains.

Basis of Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2019
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 Associated Banc-Corp (individually referred to herein as the “Parent Company,” and together with all of its subsidiaries and affiliates, collectively referred to herein as the “Corporation”) 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 consolidated balance sheets 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 allowance for loan losses, goodwill impairment assessment, mortgage servicing rights 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	6 Months Ended
	Jun. 30, 2019
Business Combinations [Abstract]
Acquisitions	Acquisitions Huntington Wisconsin Branch Acquisition On February 15, 2019, the Corporation received regulatory approval for the acquisition of the Wisconsin branches of Huntington. This all cash transaction closed on June 14, 2019 . 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 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 $7 million in goodwill related to the Huntington branch acquisition. Goodwill created by the acquisition is tax deductible. See Note 8 for additional information on goodwill, as well as the carrying amount and amortization of core deposit intangible assets related to the Huntington branch acquisition. The following table presents the estimated fair values of the assets acquired and liabilities assumed as of the acquisition date related to Huntington branch acquisition: Purchase Accounting Adjustments June 14, 2019 ($ in Thousands) Assets Cash and cash equivalents $ — $ 551,250 Loans (1,552 ) 116,344 Premises and equipment, net 4,967 22,597 Goodwill 7,075 Core deposit intangibles (included in other intangible assets, net on the face of the Consolidated Balance Sheets) 22,630 22,630 Other real estate owned (included in other assets on the face of the Consolidated Balance Sheets) (2,561 ) 5,263 Others assets — 559 Total assets $ 725,719 Liabilities Deposits $ 156 $ 725,173 Other liabilities 70 546 Total liabilities $ 725,719 The following is a description of the methods used to determine the fair value of significant assets and liabilities presented on the balance sheet above. 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. Loans were grouped together according to similar characteristics when applying various valuation techniques. Core deposit intangible ("CDI"): 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 CDI is being amortized on a straight-line basis over 10 years .

Summary of Significant Accounti

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2019
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. generally accepted accounting principles 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 2018 Annual Report on Form 10-K. There has been one change to the Corporation's significant accounting policies since December 31, 2018 , which is described below. Leases The Corporation determines if a lease is present at the inception of an agreement. Operating leases are capitalized at commencement and are discounted using the Corporation’s FHLB borrowing rate for a similar term borrowing unless the lease defines an implicit rate within the contract. Leases with original terms of less than 12 months are not capitalized. For operating leases existing prior to January 1, 2019, the rate for the remaining lease term as of January 1, 2019 was used. Right-of-use assets represent the Corporation’s right to use an underlying asset for the lease term and lease liabilities represent the obligation to make lease payments arising from the lease. Operating lease right-of-use assets and operating lease liabilities are recognized on the lease commencement date based on the present value of lease payments over the lease term. No significant judgments or assumptions were involved in developing the estimated operating lease liabilities as the Corporation’s operating lease liabilities largely represent future rental expenses associated with operating leases and the borrowing rates are based on publicly available interest rates. The lease term includes options to extend or terminate the lease. These options to extend or terminate are assessed on a lease-by-lease basis and adjustments are made to the right-of-use asset and lease liability if the Corporation is reasonably certain that an option will be exercised and will be expensed on a straight-line basis. New Accounting Pronouncements Adopted Standard Description Date of adoption Effect on financial statements ASU-2018-15 Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract The FASB issued an amendment which aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. The amendments in this Update require an entity (customer) in a hosting arrangement that is a service contract to follow the guidance in Subtopic 350-40 to determine which implementation costs to capitalize as an asset related to the service contract and which costs to expense. The amendments also require the entity (customer) to expense the capitalized implementation costs of a hosting arrangement that is a service contract over the term of the hosting arrangement. The amendment was effective for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years. Entities were required to apply the amendment either retrospectively or prospectively to all implementation costs incurred after the date of adoption. Early adoption was permitted. 1st Quarter 2019 The Corporation elected to early adopt this amendment using the prospective approach. No material impact on results of operation, financial position or liquidity. ASU 2018-09 Codification Improvements The FASB issued an amendment which affects a wide variety of Topics in the Codification. The amendments apply to all reporting entities within the scope of the affected accounting guidance. The amendments in this Update represent changes to clarify, correct errors in, or make minor improvements to the Codification. The amendments make the Codification easier to understand and easier to apply by eliminating inconsistencies and providing clarifications. The transition and effective date guidance is based on the facts and circumstances of each amendment. Some of the amendments in this Update did not require transition guidance and were effective upon issuance of this Update. However, many of the amendments in this Update did have transition guidance with effective dates for annual periods beginning after December 15, 2018. There are some conforming amendments in this Update that have been made to recently issued guidance that is not yet effective that may require application of the transition and effective date guidance in the original Accounting Standards Update. 1st Quarter 2019 No material impact on results of operations, financial position and liquidity. ASU 2016-02 Leases (Topic 842) The FASB issued an amendment to provide transparency and comparability among organizations by recognizing lease assets and lease liabilities on the consolidated balance sheets and disclosing key information about leasing arrangements. This amendment required lessees to recognize the following for all leases (with the exception of short-term leases) at the commencement date: 1) a lease liability, which is a lessee's obligation to make lease payments arising from a lease, measured on a discounted basis; and 2) a right-of-use asset, which is an asset that represents the lessee's right to use, or control the use of, a specified asset for the lease term. Under the new guidance, lessor accounting is largely unchanged. This amendment was effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2018. Entities are required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. The modified retrospective approach includes a number of optional practical expedients that entities could elect to apply. These practical expedients relate to the identification and classification of leases that commenced before the effective date, initial direct costs for leases that commenced before the effective date, and the ability to use hindsight in evaluating lessee options to extend or terminate a lease or to purchase the underlying asset. Early adoption was permitted. ASU 2018-01 permits an entity to elect an optional transition practical expedient to not evaluate under Topic 842 land easements that exist or expired before the entity's adoption of Topic 842. ASU 2018-10 was issued as improvements and clarifications of ASU 2016-02 were identified. This Update provides clarification on narrow aspects of the previously issued Updates. ASU 2018-11 was issued to provide entities with an additional (and optional) transition method to adopt the new leases standard under ASU 2016-02. ASU 2019-01 was issued to assist in determining the fair value of underlying asset by lessors, address the presentation to the statements of cash flows, and clarify transition disclosures related to Topic 250. 1st Quarter 2019 The Corporation has adopted this amendment utilizing a modified retrospective approach. At adoption, a right-of-use asset and corresponding lease liability were recognized on the consolidated balance sheets for $52 million and $56 million, respectively. See Note 18 for expanded disclosure requirements.

Earnings Per Common Share

Earnings Per Common Share	6 Months Ended
	Jun. 30, 2019
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) and common stock warrants. Presented below are the calculations for basic and diluted earnings per common share: For the Three Months Ended June 30, For the Six Months Ended June 30, 2019 2018 2019 2018 (In Thousands, except per share data) Net income $ 84,661 $ 89,192 $ 171,347 $ 158,648 Preferred stock dividends (3,801 ) (2,329 ) (7,601 ) (4,668 ) Net income available to common equity $ 80,860 $ 86,863 $ 163,746 $ 153,980 Common shareholder dividends (27,571 ) (25,977 ) (55,650 ) (51,549 ) Unvested share-based payment awards (205 ) (130 ) (308 ) (269 ) Undistributed earnings $ 53,085 $ 60,756 $ 107,787 $ 102,162 Undistributed earnings allocated to common shareholders 52,690 60,446 107,098 101,677 Undistributed earnings allocated to unvested share-based payment awards 395 310 689 485 Undistributed earnings $ 53,085 $ 60,756 $ 107,787 $ 102,162 Basic Distributed earnings to common shareholders $ 27,571 $ 25,977 $ 55,650 $ 51,549 Undistributed earnings allocated to common shareholders 52,690 60,446 107,098 101,677 Total common shareholders earnings, basic $ 80,261 $ 86,423 $ 162,748 $ 153,226 Diluted Distributed earnings to common shareholders $ 27,571 $ 25,977 $ 55,650 $ 51,549 Undistributed earnings allocated to common shareholders 52,690 60,446 107,098 101,677 Total common shareholders earnings, diluted $ 80,261 $ 86,423 $ 162,748 $ 153,226 Weighted average common shares outstanding 162,180 170,633 163,049 167,096 Effect of dilutive common stock awards 1,492 2,146 1,469 2,080 Effect of dilutive common stock warrants — 630 — 744 Diluted weighted average common shares outstanding 163,672 173,409 164,518 169,920 Basic earnings per common share $ 0.49 $ 0.51 $ 1.00 $ 0.92 Diluted earnings per common share $ 0.49 $ 0.50 $ 0.99 $ 0.90 Anti-dilutive common stock options of approximately 4 million and 2 million for the three months ended June 30, 2019 and 2018 , respectively, and 3 million and 1 million for the six months ended June 30, 2019 and 2018 , respectively, were excluded from the earnings per common share calculation.

Stock-Based Compensation

Stock-Based Compensation	6 Months Ended
	Jun. 30, 2019
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 in the consolidated statements of income. 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. 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 six months of 2019 and full year 2018 : 2019 2018 Dividend yield 3.30 % 2.50 % Risk-free interest rate 2.60 % 2.60 % Weighted average expected volatility 24.00 % 22.00 % Weighted average expected life 5.75 years 5.75 years Weighted average per share fair value of options $4.00 $4.47 A summary of the Corporation’s stock option activity for the six months ended June 30, 2019 is presented below: Stock Options Shares (a) Weighted Average Exercise Price Weighted Average Remaining Contractual Term Aggregate Intrinsic Value (a) Outstanding at December 31, 2018 5,281 $ 19.09 6.18 $ 12,392 Granted 1,050 22.77 Exercised (418 ) 15.68 Forfeited or expired (85 ) 23.96 Outstanding at June 30, 2019 5,828 $ 19.94 6.61 $ 14,870 Options Exercisable at June 30, 2019 3,631 $ 18.04 5.32 $ 14,016 (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 six months ended June 30, 2019 , the intrinsic value of stock options exercised was approximately $3 million , compared to $9 million for the six months ended June 30, 2018 . The total fair value of stock options vested was $4 million for the six months ended June 30, 2019 and June 30, 2018 . The Corporation recognized compensation expense for the vesting of stock options of $3 million for the six months ended June 30, 2019 and $2 million for the six months ended June 30, 2018 . Included in compensation expense for 2019 was $1 million of expense for the accelerated vesting of stock options granted to retirement eligible colleagues. At June 30, 2019 , 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 first quarter 2023 . The Corporation also issues restricted stock awards under the 2017 Incentive Compensation Plan. The following table summarizes information about the Corporation’s restricted stock awards activity for the six months ended June 30, 2019 : Restricted Stock Awards Shares (a) Weighted Average Grant Date Fair Value Outstanding at December 31, 2018 1,993 $ 21.92 Granted 1,164 22.21 Vested (673 ) 20.49 Forfeited (38 ) 24.14 Outstanding at June 30, 2019 2,446 $ 22.42 (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 2018 and 2019 will vest ratably over a period of three years . Service-based restricted stock awards granted during 2018 and 2019 will vest ratably over a period of four years . Expense for restricted stock awards issued of approximately $13 million was recorded for the six months ended June 30, 2019 and $6 million was recorded for the six months ended June 30, 2018 . Included in compensation expense for 2019 was approximately $3 million of expense for the accelerated vesting of restricted stock awards granted to retirement eligible colleagues. The Corporation had $28 million of unrecognized compensation costs related to restricted stock awards at June 30, 2019 , that is expected to be recognized over the remaining requisite service periods that extend through first quarter 2023 . 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 stock in the market, to be made available for issuance in connection with the Corporation’s employee incentive plans and for other corporate purposes. The repurchase of shares will be based on market and investment opportunities, capital levels, growth prospects, and regulatory constraints. Such repurchases may occur from time to time in open market purchases, block transactions, private transactions, accelerated share repurchase programs, or similar facilities.

Investment Securities

Investment Securities	6 Months Ended
	Jun. 30, 2019
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Investment Securities Investment securities are generally classified as available for sale or held to maturity at the time of purchase. The majority of the Corporation's investment securities are mortgage-related securities issued by GNMA or GSEs such as FNMA and FHLMC. Obligations of state and political subdivisions (municipal securities) make up a large percentage of the portfolio as well. The amortized cost and fair values of securities available for sale and held to maturity at June 30, 2019 were as follows: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value ($ in Thousands) Investment securities available for sale Residential mortgage-related securities FNMA / FHLMC $ 182,893 $ 1,646 $ (817 ) $ 183,722 GNMA 1,325,739 7,942 (2,048 ) 1,331,633 Private-label 805 9 — 814 Commercial mortgage-related securities FNMA / FHLMC 20,244 858 — 21,102 GNMA 1,483,392 6,217 (19,562 ) 1,470,048 FFELP asset backed securities 274,520 152 (1,535 ) 273,137 Other debt securities 3,000 — — 3,000 Total investment securities available for sale $ 3,290,593 $ 16,825 $ (23,962 ) $ 3,283,456 Investment securities held to maturity U. S. Treasury securities $ 999 $ 20 $ — $ 1,019 Obligations of state and political subdivisions (municipal securities) 1,913,737 68,372 (152 ) 1,981,957 Residential mortgage-related securities FNMA / FHLMC 89,078 1,143 (145 ) 90,076 GNMA 321,046 3,430 (292 ) 324,184 GNMA commercial mortgage-related securities 481,205 7,264 (10,948 ) 477,521 Total investment securities held to maturity $ 2,806,064 $ 80,230 $ (11,537 ) $ 2,874,758 The amortized cost and fair values of securities available for sale and held to maturity at December 31, 2018 were as follows: Amortized Gross Gross Fair Value ($ in Thousands) Investment securities available for sale U. S. Treasury securities $ 1,000 $ — $ (1 ) $ 999 Residential mortgage-related securities FNMA / FHLMC 296,296 2,466 (3,510 ) 295,252 GNMA 2,169,943 473 (41,885 ) 2,128,531 Private-label 1,007 — (4 ) 1,003 GNMA commercial mortgage-related securities 1,273,309 — (52,512 ) 1,220,797 FFELP asset backed securities 297,347 711 (698 ) 297,360 Other debt securities 3,000 — — 3,000 Total investment securities available for sale $ 4,041,902 $ 3,649 $ (98,610 ) $ 3,946,941 Investment securities held to maturity Obligations of state and political subdivisions (municipal securities) $ 1,790,683 $ 8,255 $ (15,279 ) $ 1,783,659 Residential mortgage-related securities FNMA / FHLMC 92,788 169 (1,795 ) 91,162 GNMA 351,606 1,611 (8,181 ) 345,035 GNMA commercial mortgage-related securities 505,434 7,559 (22,579 ) 490,414 Total investment securities held to maturity $ 2,740,511 $ 17,593 $ (47,835 ) $ 2,710,271 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 June 30, 2019 are shown below: Available for Sale Held to Maturity Amortized Cost Fair Value Amortized Cost Fair Value ($ in Thousands) Due in one year or less $ 1,000 $ 1,000 $ 48,235 $ 48,393 Due after one year through five years 2,000 2,000 184,581 185,909 Due after five years through ten years — — 479,215 491,122 Due after ten years — — 1,202,705 1,257,552 Total debt securities 3,000 3,000 1,914,735 1,982,976 Residential mortgage-related securities FNMA / FHLMC 182,893 183,722 89,078 90,076 GNMA 1,325,739 1,331,633 321,046 324,184 Private-label 805 814 — — Commercial mortgage-related securities FNMA / FHLMC 20,244 21,102 — — GNMA 1,483,392 1,470,048 481,205 477,521 FFELP asset backed securities 274,520 273,137 — — Total investment securities $ 3,290,593 $ 3,283,456 $ 2,806,064 $ 2,874,758 Ratio of fair value to amortized cost 99.8 % 102.4 % 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 and write-up of investment securities for the six months ended June 30, 2019 and 2018 are shown below: Six Months Ended June 30, 2019 2018 ($ in Thousands) Gross gains on available for sale securities $ 2,334 $ — Gross gains on held to maturity securities — — Total gains 2,334 — Gross losses on available for sale securities (13,636 ) (2,015 ) Gross losses on held to maturity securities — — Total losses (13,636 ) (2,015 ) Write-up of equity securities without readily determinable fair values 13,444 — Investment securities gains (losses), net $ 2,143 $ (2,015 ) Proceeds from sales of investment securities $ 934,228 $ 493,060 During the first six months of 2019, the Corporation sold $934 million of taxable, floating rate ABS and shorter duration MBS, CMBS, and CMO Agency securities, with the proceeds utilized to pay down borrowings and to reinvest into higher yielding Agency related mortgage securities with slightly longer durations, repositioning the portfolio for a stable to declining rate environment. The Corporation also donated 42,039 shares of Visa Class B restricted shares to the Corporation's Charitable Remainder Trust during the second quarter of 2019, and the subsequent sale of those shares by the Trust resulted in an observable market price. As a result, the Corporation wrote up its remaining 77,000 Visa Class B restricted shares to fair value. Based on the existing transfer restriction and the uncertainty of covered litigation, the shares were previously carried at a zero cost basis. During the first six months of 2018, the Corporation sold approximately $40 million of lower yielding GNMA commercial mortgage-related securities. In addition, on February 1, 2018, the date the Bank Mutual acquisition was completed, the Corporation sold Bank Mutual's entire $ 453 million securities portfolio. The Corporation originally reinvested the proceeds from the Bank Mutual securities portfolio into GNMA residential mortgage-related securities with the goal of reinvesting future cash flows into municipal securities. That strategy was completed during August 2018. Investment securities with a carrying value of approximately $3.3 billion and $3.0 billion at June 30, 2019 , and December 31, 2018 , respectively, were required to be pledged to secure certain deposits or for other purposes as required or permitted by law. The following represents gross unrealized losses and the related fair value of investment securities available for sale and held to maturity, aggregated by investment category and length of time individual securities have been in a continuous unrealized loss position, at June 30, 2019 : Less than 12 months 12 months or more Total Number of Securities Unrealized Losses Fair Value Number of Securities Unrealized Losses Fair Value Unrealized Losses Fair Value ($ in Thousands) Investment securities available for sale Residential mortgage-related securities FNMA / FHLMC 3 $ — $ 781 14 $ (817 ) $ 121,661 $ (817 ) $ 122,441 GNMA 2 (602 ) 53,013 13 (1,446 ) 316,714 (2,048 ) 369,727 GNMA commercial mortgage-related securities — — — 70 (19,562 ) 1,002,980 (19,562 ) 1,002,980 FFELP asset backed securities 16 (1,380 ) 205,710 1 (155 ) 5,839 (1,535 ) 211,550 Other debt securities 3 — 3,000 — — — — 3,000 Total 24 $ (1,982 ) $ 262,504 98 $ (21,979 ) $ 1,447,194 $ (23,962 ) $ 1,709,698 Investment securities held to maturity Obligations of state and political subdivisions (municipal securities) 8 $ (12 ) $ 3,962 50 $ (140 ) $ 25,109 $ (152 ) $ 29,071 Residential mortgage-related securities FNMA / FHLMC — — — 10 (145 ) 18,474 (145 ) 18,474 GNMA 1 (51 ) 6,956 27 (241 ) 35,339 (292 ) 42,295 GNMA commercial mortgage-related securities — — — 22 (10,948 ) 404,790 (10,948 ) 404,790 Total 9 $ (63 ) $ 10,918 109 $ (11,474 ) $ 483,712 $ (11,537 ) $ 494,630 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, 2018 : Less than 12 months 12 months or more Total Number Unrealized Fair Number Unrealized Fair Unrealized Fair ($ in Thousands) Investment securities available for sale U.S. Treasury securities — $ — $ — 1 $ (1 ) $ 999 $ (1 ) $ 999 Residential mortgage-related securities FNMA / FHLMC 15 (31 ) 17,993 17 (3,479 ) 189,405 (3,510 ) 207,398 GNMA 12 (4,529 ) 452,183 79 (37,355 ) 1,598,159 (41,885 ) 2,050,342 Private-label 1 (4 ) 1,003 — — — (4 ) 1,003 GNMA commercial mortgage-related securities — — — 93 (52,512 ) 1,220,854 (52,512 ) 1,220,854 FFELP asset backed securities 13 (698 ) 142,432 — — — (698 ) 142,432 Total 41 $ (5,262 ) $ 613,612 190 $ (93,347 ) $ 3,009,417 $ (98,610 ) $ 3,623,028 Investment securities held to maturity Obligations of state and political subdivisions (municipal securities) 272 $ (2,860 ) $ 313,212 752 $ (12,419 ) $ 509,374 $ (15,279 ) $ 822,586 Residential mortgage-related securities FNMA / FHLMC 13 (780 ) 57,896 22 (1,015 ) 28,888 (1,795 ) 86,784 GNMA 13 (414 ) 19,822 66 (7,767 ) 320,387 (8,181 ) 340,209 GNMA commercial mortgage-related securities — — — 25 (22,579 ) 490,414 (22,579 ) 490,414 Total 298 $ (4,053 ) $ 390,929 865 $ (43,780 ) $ 1,349,063 $ (47,835 ) $ 1,739,992 The Corporation reviews the investment securities portfolio on a quarterly basis to monitor its exposure to other-than-temporary impairment. A determination as to whether a security’s decline in fair value is other-than-temporary 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 other-than-temporary impairment analysis include the length of time and extent to which the security has been in an unrealized loss position, changes in security ratings, financial condition and near-term prospects of the issuer, as well as security and industry specific economic conditions. Based on the Corporation’s evaluation, management does not believe any unrealized loss at June 30, 2019 represents an other-than-temporary impairment as these unrealized losses are primarily attributable to changes in interest rates and the current market conditions, and not credit deterioration. The unrealized losses reported for municipal securities relate to various state and local political subdivisions and school districts. The unrealized losses at June 30, 2019 for mortgage-related securities have declined due to the decrease in overall interest rates. The U.S. Treasury 3 year and 5 year rates both decreased by 75 bp from December 31, 2018 . 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 June 30, 2019 and December 31, 2018 , the Corporation had FHLB stock of $125 million and $173 million , respectively. The Corporation had Federal Reserve Bank stock of $78 million at June 30, 2019 and $77 million at December 31, 2018 . 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 June 30, 2019 and December 31, 2018 , the Corporation had equity securities with readily determinable fair values of $2 million . Equity securities without readily determinable fair values: The Corporation's portfolio of equity securities without readily determinable fair values consists of Visa Class B restricted shares that the Corporation received in 2008 as part of Visa's initial public offering. During the second quarter of 2019, the Corporation donated 42,039 shares of Visa Class B restricted shares to the Corporation's Charitable Remainder Trust, and the subsequent sale of those shares by the Trust resulted in an observable market price. As a result, the Corporation wrote up their remaining 77,000 Visa Class B restricted shares to fair value. Based on the existing transfer restriction and the uncertainty of the covered litigation, the Visa Class B restricted shares were previously carried at a zero cost basis. Thus, the Corporation had equity securities without readily determinable fair values of $13 million at June 30, 2019 and $0 at December 31, 2018

Loans

Loans	6 Months Ended
	Jun. 30, 2019
Receivables [Abstract]
Loans	Loans The period end loan composition was as follows: June 30, 2019 December 31, 2018 ($ in Thousands) Commercial and industrial $ 7,579,384 $ 7,398,044 Commercial real estate — owner occupied 942,811 920,443 Commercial and business lending 8,522,194 8,318,487 Commercial real estate — investor 3,779,201 3,751,554 Real estate construction 1,394,815 1,335,031 Commercial real estate lending 5,174,016 5,086,585 Total commercial 13,696,210 13,405,072 Residential mortgage 8,277,479 8,277,712 Home equity 916,213 894,473 Other consumer 360,065 363,171 Total consumer 9,553,757 9,535,357 Total loans (a) $ 23,249,967 $ 22,940,429 (a) Includes $2 million and $5 million of purchased credit-impaired loans at June 30, 2019 and December 31, 2018 , respectively. The following table presents commercial and consumer loans by credit quality indicator at June 30, 2019 : Pass Special Mention Potential Problem Nonaccrual Total ($ in Thousands) Commercial and industrial $ 7,387,549 $ 49,026 $ 58,658 $ 84,151 $ 7,579,384 Commercial real estate - owner occupied 909,641 8,362 24,237 571 942,811 Commercial and business lending 8,297,189 57,388 82,895 84,722 8,522,194 Commercial real estate - investor 3,628,197 71,753 77,766 1,485 3,779,201 Real estate construction 1,382,502 8,720 3,166 427 1,394,815 Commercial real estate lending 5,010,699 80,473 80,932 1,912 5,174,016 Total commercial 13,307,888 137,860 163,828 86,634 13,696,210 Residential mortgage 8,206,689 641 1,983 68,166 8,277,479 Home equity 903,694 652 32 11,835 916,213 Other consumer 359,487 506 — 72 360,065 Total consumer 9,469,870 1,799 2,014 80,073 9,553,757 Total loans $ 22,777,758 $ 139,660 $ 165,842 $ 166,707 $ 23,249,967 The following table presents commercial and consumer loans by credit quality indicator at December 31, 2018 : Pass Special Mention Potential Problem Nonaccrual Total ($ in Thousands) Commercial and industrial $ 7,162,370 $ 78,075 $ 116,578 $ 41,021 $ 7,398,044 Commercial real estate - owner occupied 854,265 6,257 55,964 3,957 920,443 Commercial and business lending 8,016,635 84,332 172,542 44,978 8,318,487 Commercial real estate - investor 3,653,642 28,479 67,481 1,952 3,751,554 Real estate construction 1,321,447 8,771 3,834 979 1,335,031 Commercial real estate lending 4,975,089 37,249 71,315 2,931 5,086,585 Total commercial 12,991,724 121,582 243,856 47,909 13,405,072 Residential mortgage 8,203,729 434 5,975 67,574 8,277,712 Home equity 880,808 1,223 103 12,339 894,473 Other consumer 362,343 749 — 79 363,171 Total consumer 9,446,881 2,406 6,078 79,992 9,535,357 Total loans $ 22,438,605 $ 123,988 $ 249,935 $ 127,901 $ 22,940,429 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. Lastly, management considers a loan to be impaired when it is probable the Corporation will be unable to collect all amounts due according to the original contractual terms of the note agreement, including both principal and interest. Management has determined commercial and consumer loan relationships in nonaccrual status or those with their terms restructured in a troubled debt restructuring meet this impaired loan definition. 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 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 June 30, 2019 : Accruing Current 30-59 Days Past Due 60-89 Days Past Due 90 Days or More Past Due Nonaccrual (a) Total ($ in Thousands) Commercial and industrial $ 7,490,030 $ 4,769 $ 139 $ 293 $ 84,151 $ 7,579,384 Commercial real estate - owner occupied 940,222 2,018 — — 571 942,811 Commercial and business lending 8,430,252 6,787 139 293 84,722 8,522,194 Commercial real estate - investor 3,776,334 1,382 — — 1,485 3,779,201 Real estate construction 1,394,237 131 19 — 427 1,394,815 Commercial real estate lending 5,170,572 1,513 19 — 1,912 5,174,016 Total commercial 13,600,824 8,300 159 293 86,634 13,696,210 Residential mortgage 8,199,557 9,199 558 — 68,166 8,277,479 Home equity 898,550 5,176 652 — 11,835 916,213 Other consumer 356,360 1,150 688 1,795 72 360,065 Total consumer 9,454,467 15,524 1,898 1,795 80,073 9,553,757 Total loans $ 23,055,291 $ 23,824 $ 2,057 $ 2,088 $ 166,707 $ 23,249,967 (a) Of the total nonaccrual loans, $90 million , or 54% , were current with respect to payment at June 30, 2019 . The following table presents loans by past due status at December 31, 2018 : Accruing Current 30-59 Days Past Due 60-89 Days Past Due 90 Days or More Past Due Nonaccrual (a) Total ($ in Thousands) Commercial and industrial $ 7,356,187 $ 187 $ 338 $ 311 $ 41,021 $ 7,398,044 Commercial real estate - owner occupied 913,787 2,580 119 — 3,957 920,443 Commercial and business lending 8,269,974 2,767 457 311 44,978 8,318,487 Commercial real estate - investor 3,745,835 2,954 813 — 1,952 3,751,554 Real estate construction 1,333,722 330 — — 979 1,335,031 Commercial real estate lending 5,079,557 3,284 813 — 2,931 5,086,585 Total commercial 13,349,531 6,051 1,270 311 47,909 13,405,072 Residential mortgage 8,200,432 9,272 434 — 67,574 8,277,712 Home equity 876,085 4,826 1,223 — 12,339 894,473 Other consumer 358,970 1,401 868 1,853 79 363,171 Total consumer 9,435,487 15,499 2,525 1,853 79,992 9,535,357 Total loans $ 22,785,019 $ 21,550 $ 3,795 $ 2,165 $ 127,901 $ 22,940,429 (a) Of the total nonaccrual loans, $74 million , or 58% , were current with respect to payment at December 31, 2018 . The following table presents impaired loans individually evaluated under ASC Topic 310, excluding $2 million of purchased credit-impaired loans, at June 30, 2019 : Recorded Unpaid Related Average Interest ($ in Thousands) Loans with a related allowance Commercial and industrial $ 83,561 $ 94,759 $ 22,890 $ 48,118 $ 1,104 Commercial real estate — owner occupied 1,970 1,977 27 2,017 51 Commercial and business lending 85,531 96,735 22,917 50,135 1,155 Commercial real estate — investor 776 782 103 786 17 Real estate construction 417 497 56 422 14 Commercial real estate lending 1,193 1,279 159 1,208 31 Total commercial 86,724 98,015 23,076 51,343 1,186 Residential mortgage 45,856 49,110 5,693 45,953 991 Home equity 9,609 10,600 3,233 11,042 240 Other consumer 1,225 1,227 185 1,227 — Total consumer 56,690 60,938 9,112 58,222 1,231 Total loans with a related allowance $ 143,414 $ 158,952 $ 32,188 $ 109,565 $ 2,417 Loans with no related allowance Commercial and industrial $ 16,505 $ 33,999 $ — $ 23,303 $ 25 Commercial real estate — owner occupied 503 735 — 569 3 Commercial and business lending 17,007 34,734 — 23,872 28 Commercial real estate — investor 635 1,805 — 638 — Real estate construction — — — — — Commercial real estate lending 635 1,805 — 638 — Total commercial 17,642 36,539 — 24,511 28 Residential mortgage 10,416 10,584 — 8,183 178 Home equity 1,017 1,036 — — 11 Other consumer — — — — — Total consumer 11,432 11,620 — 8,183 189 Total loans with no related allowance $ 29,075 $ 48,159 $ — $ 32,694 $ 216 Total Commercial and industrial $ 100,066 $ 128,758 $ 22,890 $ 71,421 $ 1,129 Commercial real estate — owner occupied 2,473 2,712 27 2,586 54 Commercial and business lending 102,538 131,470 22,917 74,007 1,183 Commercial real estate — investor 1,411 2,587 103 1,424 17 Real estate construction 417 497 56 422 14 Commercial real estate lending 1,828 3,084 159 1,847 31 Total commercial 104,367 134,554 23,076 75,853 1,214 Residential mortgage 56,272 59,694 5,693 54,136 1,168 Home equity 10,626 11,636 3,233 11,042 251 Other consumer 1,225 1,227 185 1,227 — Total consumer 68,122 72,557 9,112 66,405 1,420 Total loans (a) $ 172,489 $ 207,111 $ 32,188 $ 142,258 $ 2,633 (a) The net recorded investment (defined as recorded investment, net of the related allowance) of the impaired loans represented 68% of the unpaid principal balance at June 30, 2019 . The following table presents impaired loans individually evaluated under ASC Topic 310, excluding $5 million of purchased credit-impaired loans, at December 31, 2018 : Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized ($ in Thousands) Loans with a related allowance Commercial and industrial $ 40,747 $ 42,131 $ 5,721 $ 52,461 $ 1,167 Commercial real estate — owner occupied 2,080 2,087 24 2,179 104 Commercial and business lending 42,827 44,218 5,745 54,640 1,271 Commercial real estate — investor 799 805 28 827 38 Real estate construction 510 589 75 533 32 Commercial real estate lending 1,309 1,394 103 1,360 70 Total commercial 44,136 45,612 5,848 56,000 1,341 Residential mortgage 41,691 45,149 6,023 42,687 1,789 Home equity 9,601 10,539 3,312 10,209 566 Other consumer 1,181 1,183 121 1,184 3 Total consumer 52,473 56,871 9,456 54,080 2,358 Total loans with a related allowance $ 96,609 $ 102,483 $ 15,304 $ 110,079 $ 3,699 Loans with no related allowance Commercial and industrial $ 22,406 $ 45,024 $ — $ 21,352 $ (344 ) Commercial real estate — owner occupied 3,772 4,823 — 3,975 — Commercial and business lending 26,178 49,847 — 25,327 (344 ) Commercial real estate — investor 1,585 2,820 — 980 68 Real estate construction — — — — — Commercial real estate lending 1,585 2,820 — 980 68 Total commercial 27,763 52,667 — 26,307 (276 ) Residential mortgage 8,795 9,074 — 8,790 203 Home equity 523 542 — 530 — Other consumer — — — — — Total consumer 9,318 9,616 — 9,320 203 Total loans with no related allowance $ 37,081 $ 62,283 $ — $ 35,627 $ (73 ) Total Commercial and industrial $ 63,153 $ 87,155 $ 5,721 $ 73,813 $ 823 Commercial real estate — owner occupied 5,852 6,910 24 6,154 104 Commercial and business lending 69,005 94,065 5,745 79,967 927 Commercial real estate — investor 2,384 3,625 28 1,807 106 Real estate construction 510 589 75 533 32 Commercial real estate lending 2,894 4,214 103 2,340 138 Total commercial 71,899 98,279 5,848 82,307 1,065 Residential mortgage 50,486 54,223 6,023 51,477 1,992 Home equity 10,124 11,081 3,312 10,739 566 Other consumer 1,181 1,183 121 1,184 3 Total consumer 61,791 66,487 9,456 63,400 2,561 Total loans (a) $ 133,690 $ 164,766 $ 15,304 $ 145,707 $ 3,626 (a) The net recorded investment (defined as recorded investment, net of the related allowance) of the impaired loans represented 72% of the unpaid principal balance at December 31, 2018 . Troubled Debt Restructurings (“Restructured Loans”) Loans are considered restructured loans if concessions have been granted to borrowers that are experiencing financial difficulty. The Corporation had a recorded investment of approximately $6 million in loans modified in troubled debt restructurings during the six months ended June 30, 2019 , of which $1 million were in accrual status and approximately $5 million were in nonaccrual pending a sustained period of repayment. The following table presents nonaccrual and performing restructured loans by loan portfolio: June 30, 2019 December 31, 2018 Performing Restructured Loans Nonaccrual Restructured Loans (a) Performing Restructured Loans Nonaccrual Restructured Loans (a) ($ in Thousands) Commercial and industrial $ 16,850 $ 101 $ 25,478 $ 249 Commercial real estate — owner occupied 1,970 — 2,080 — Commercial real estate — investor 315 461 799 933 Real estate construction 232 185 311 198 Residential mortgage 17,645 21,213 16,036 22,279 Home equity 7,247 2,369 7,385 2,627 Other consumer 1,222 3 1,174 6 Total restructured loans $ 45,481 $ 24,332 $ 53,263 $ 26,292 (a) Nonaccrual restructured loans have been included within nonaccrual loans. The following table provides the number of loans modified in a troubled debt restructuring by loan portfolio, the recorded investment and unpaid principal balance for the six months ended June 30, 2019 and 2018 : Six Months Ended June 30, 2019 Six Months Ended June 30, 2018 Number of Loans Recorded Investment (a) Unpaid Principal Balance (b) Number of Loans Recorded Investment (a) Unpaid Principal Balance (b) ($ in Thousands) Commercial and industrial 1 $ 196 $ 196 1 $ 47 $ 47 Commercial real estate — investor — — — 1 984 1,031 Residential mortgage 38 5,665 5,682 10 2,064 2,064 Home equity 18 499 506 10 935 949 Other consumer 1 10 10 1 5 8 Total loans modified 58 $ 6,370 $ 6,394 23 $ 4,035 $ 4,099 (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 six months ended June 30, 2019 , restructured loan modifications of commercial and industrial, commercial real estate, and real estate construction loans primarily included maturity date extensions and payment schedule modifications. Restructured loan modifications of residential mortgage, home equity, and other consumer loans primarily included maturity date extensions, interest rate concessions, non-reaffirmed Chapter 7 bankruptcies, or a combination of these concessions for the six months ended June 30, 2019 . The following table provides the number of loans modified in a troubled debt restructuring during the previous twelve months which subsequently defaulted during the six months ended June 30, 2019 and 2018 and the recorded investment in these restructured loans as of June 30, 2019 and 2018 : Six Months Ended June 30, 2019 Six Months Ended June 30, 2018 Number of Loans Recorded Investment Number of Loans Recorded Investment ($ in Thousands) Commercial and industrial — $ — 3 $ — Residential mortgage 16 2,813 8 2,219 Home equity 14 477 21 1,409 Total loans modified 30 $ 3,290 32 $ 3,628 All loans modified in a troubled debt restructuring 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 loan losses. Allowance for Credit Losses The allowance for credit losses is comprised of the allowance for loan losses and the allowance for unfunded commitments. The level of the allowance for loan losses represents management’s estimate of an amount appropriate to provide for probable credit losses in the loan portfolio at the balance sheet date. The allowance for unfunded commitments is maintained at a level believed by management to be sufficient to absorb estimated probable losses related to unfunded credit facilities (including unfunded loan commitments and letters of credit) and is included in accrued expenses and other liabilities on the consolidated balance sheets. See Note 12 for additional information on the allowance for unfunded commitments. The following table presents a summary of the changes in the allowance for loan losses by portfolio segment for the six months ended June 30, 2019 : ($ in Thousands) Commercial and Commercial real estate - owner occupied Commercial real estate - Real estate Residential Home Other Total December 31, 2018 $ 108,835 $ 9,255 $ 40,844 $ 28,240 $ 25,595 $ 19,266 $ 5,988 $ 238,023 Charge offs (26,255 ) (222 ) — (60 ) (1,260 ) (725 ) (2,726 ) (31,247 ) Recoveries 6,650 1,312 34 211 438 1,273 467 10,384 Net Charge offs (19,605 ) 1,089 34 151 (822 ) 548 (2,259 ) (20,864 ) Provision for loan losses 23,970 (1,110 ) 10 (1,267 ) (3,421 ) (4,241 ) 2,558 16,500 June 30, 2019 $ 113,199 $ 9,235 $ 40,888 $ 27,124 $ 21,352 $ 15,573 $ 6,287 $ 233,659 Allowance for loan losses Individually evaluated for impairment $ 22,890 $ 27 $ 103 $ 56 $ 5,693 $ 3,233 $ 185 $ 32,188 Collectively evaluated for impairment 90,309 9,207 40,785 27,068 15,659 12,340 6,102 201,470 Total allowance for loan losses $ 113,199 $ 9,235 $ 40,888 $ 27,124 $ 21,352 $ 15,573 $ 6,287 $ 233,659 Loans Individually evaluated for impairment $ 100,066 $ 2,473 $ 1,411 $ 417 $ 56,272 $ 10,626 $ 1,225 $ 172,489 Collectively evaluated for impairment 7,478,790 939,647 3,777,511 1,394,384 8,220,602 905,560 358,841 23,075,334 Acquired and accounted for under ASC 310-30 (a) 528 691 279 14 605 27 — 2,145 Total loans $ 7,579,384 $ 942,811 $ 3,779,201 $ 1,394,815 $ 8,277,479 $ 916,213 $ 360,065 $ 23,249,967 (a) Loans acquired in business combinations and accounted for under ASC Subtopic 310-30 "Receivables — Loans and Debt Securities Acquired with Deteriorated Credit Quality." For comparison purposes, a summary of the changes in the allowance for loan losses by portfolio segment for the year ended December 31, 2018 , was as follows: ($ in Thousands) Commercial and Commercial real estate Commercial real estate - Real estate Residential Home Other Total December 31, 2017 $ 123,068 $ 10,352 $ 41,059 $ 34,370 $ 29,607 $ 22,126 $ 5,298 $ 265,880 Charge offs (30,837 ) (1,363 ) (7,914 ) (298 ) (1,627 ) (3,236 ) (5,261 ) (50,536 ) Recoveries 13,714 639 668 446 1,271 2,628 812 20,179 Net Charge offs (17,123 ) (724 ) (7,246 ) 149 (355 ) (608 ) (4,448 ) (30,358 ) Provision for loan losses 2,890 (373 ) 7,031 (6,279 ) (3,657 ) (2,252 ) 5,138 2,500 December 31, 2018 $ 108,835 $ 9,255 $ 40,844 $ 28,240 $ 25,595 $ 19,266 $ 5,988 $ 238,023 Allowance for loan losses Individually evaluated for impairment $ 5,721 $ 24 $ 28 $ 75 $ 6,023 $ 3,312 $ 121 $ 15,304 Collectively evaluated for impairment 103,114 9,231 40,816 28,165 19,572 15,954 5,867 222,719 Total allowance for loan losses $ 108,835 $ 9,255 $ 40,844 $ 28,240 $ 25,595 $ 19,266 $ 5,988 $ 238,023 Loans Individually evaluated for impairment $ 63,153 $ 5,852 $ 2,384 $ 510 $ 50,486 $ 10,124 $ 1,181 $ 133,690 Collectively evaluated for impairment 7,331,898 913,708 3,748,883 1,334,500 8,226,642 884,266 361,990 22,801,887 Acquired and accounted for under ASC 310-30 (a) 2,994 883 287 21 584 83 — 4,853 Total loans $ 7,398,044 $ 920,443 $ 3,751,554 $ 1,335,031 $ 8,277,712 $ 894,473 $ 363,171 $ 22,940,429 (a) Loans acquired in business combinations and accounted for under ASC Subtopic 310-30 "Receivables — Loans and Debt Securities Acquired with Deteriorated Credit Quality." The allowance related to the oil and gas portfolio was $25 million , or 3.8% of total oil and gas loans, and $12 million , or 1.6% of total oil and gas loans, at June 30, 2019 and December 31, 2018 , respectively. ($ in Millions) Six Months Ended June 30, 2019 Year Ended December 31, 2018 Balance at beginning of period $ 12 $ 27 Charge offs (17 ) (24 ) Recoveries 4 6 Net Charge offs (13 ) (17 ) Provision for loan losses 26 2 Balance at end of period $ 25 $ 12 Allowance for loan losses Individually evaluated for impairment $ 16 $ — Collectively evaluated for impairment 9 12 Total allowance for loan losses $ 25 $ 12 Loans Individually evaluated for impairment $ 63 $ 22 Collectively evaluated for impairment 594 725 Total loans $ 657 $ 747 The allowance for unfunded commitments is maintained at a level believed by management to be sufficient to absorb estimated probable losses related to unfunded credit facilities (including unfunded loan commitments and letters of credit) and is included in accrued expenses and other liabilities on the consolidated balance sheets. The following table presents a summary of the changes in the allowance for unfunded commitments: Six Months Ended June 30, 2019 Year Ended December 31, 2018 ($ in Thousands) Allowance for Unfunded Commitments Balance at beginning of period $ 24,336 $ 24,400 Provision for unfunded commitments (2,500 ) (2,500 ) Amount recorded at acquisition 70 2,436 Balance at end of period $ 21,907 $ 24,336 Loans Acquired in Acquisition Loans acquired in a business combination are recorded at estimated fair value on their purchase date without a carryover of the related allowance for loan losses. Acquired loans are segregated into two types: • Performing loans are 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 are accounted for in accordance with ASC Topic 310-30 as they display significant credit deterioration since origination. For performing loans the difference between the estimated fair value of the loans and the principal outstanding is accreted over the remaining life of the loans. In accordance with ASC 310-30, purchased credit-impaired loans are pooled by loan type and the difference between contractually required payments at acquisition and the cash flows expected to be collected is referred to as the non-accretable difference. Further, any excess of cash flows expected at acquisition over the estimated fair value is referred to as the accretable yield and is recognized into interest income over the remaining life of the loan pools when there is a reasonable expectation about the amount and timing of such cash flows. If a reasonable expectation on the amount or timing of such cash flows cannot be determined, accretion of the fair value discount for nonperforming loans will be recognized using the cost recovery method of accounting. Changes in the accretable yield for loans acquired and accounted for under ASC Topic 310-30 were as follows for the six months ended June 30, 2019 and for the year ended December 31, 2018 : Six Months Ended June 30, 2019 Year Ended December 31, 2018 ($ in Thousands) Changes in Accretable Yield Balance at beginning of period $ 1,482 $ — Purchases — 4,853 Accretion (812 ) (4,954 ) Net reclassification from non-accretable yield 23 1,605 Other (a) — (22 ) Balance at end of period $ 694 $ 1,482 (a) Primarily includes charge-offs which are accounted for under ASC Subtopic 310-30 "Receivables — Loans and Debt Securities Acquired with Deteriorated Credit Quality." For loans acquired, the fair value of purchased credit-impaired loans, on the acquisition date, was determined based on assigned risk ratings, expected cash flows and the fair value of loan collateral. The fair value of loans that were non-impaired was determined based on estimates of losses on defaults and other market factors. The Corporation's Huntington branch acquisition included no purchased credit-impaired loans. At June 30, 2019 , the Corporation had a total of approximately $17 million in net unaccreted purchase discount, of which approximately $16 million was related to performing loans and approximately $1 million was related to the Corporation's purchased credit-impaired loans. At December 31, 2018 , the Corporation had a total of approximately $20 million in net unaccreted purchase discount, of which approximately $18 million was related to performing loans and approximately $2 million

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	6 Months Ended
	Jun. 30, 2019
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. There were no impairment charges recorded in 2018 or the first six months of 2019 . At both June 30, 2019 and December 31, 2018 , the Corporation had goodwill of $1.2 billion . There was an increase of $7 million during the second quarter of 2019 related to the Huntington branch acquisition. Other Intangible Assets The Corporation has other intangible assets that are amortized, consisting of CDI, other intangibles (primarily related to customer relationships acquired in connection with the Corporation’s insurance agency acquisitions), and mortgage servicing rights. For CDI and other intangibles, changes in the gross carrying amount, accumulated amortization, and net book value were as follows: Six Months Ended June 30, 2019 Year Ended December 31, 2018 ($ in Thousands) Core deposit intangibles Gross carrying amount $ 80,730 $ 58,100 Accumulated amortization (8,419 ) (5,326 ) Net book value $ 72,310 $ 52,774 Additions during the period $ 22,630 $ 58,100 Amortization during the year $ 3,094 $ 5,326 Other intangibles Gross carrying amount $ 44,887 $ 44,931 Reductions due to sale — (43 ) Accumulated amortization (23,282 ) (21,825 ) Net book value $ 21,605 $ 23,062 Additions during the period $ — $ 10,359 Amortization during the year $ 1,457 $ 2,833 Mortgage Servicing Rights The Corporation sells residential mortgage loans in the secondary market and typically retains the right to service the loans sold. MSR 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 mortgage servicing rights 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 mortgage servicing rights asset generally decreases, requiring additional valuation reserve. Conversely, as mortgage interest rates rise, prepayment speeds are usually slower and the value of the mortgage servicing rights 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 mortgage servicing rights exceeds the estimated fair value by stratification. 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 mortgage servicing rights 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 mortgage servicing rights 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 mortgage servicing rights asset. A summary of changes in the balance of the mortgage servicing rights asset and the mortgage servicing rights valuation allowance is as follows: Six Months Ended June 30, 2019 Year Ended December 31, 2018 ($ in Thousands) Mortgage servicing rights Mortgage servicing rights at beginning of period $ 68,433 $ 59,168 Additions from acquisition — 8,136 Additions 3,575 10,722 Amortization (5,448 ) (9,594 ) Mortgage servicing rights at end of period $ 66,560 $ 68,433 Valuation allowance at beginning of period (239 ) (784 ) (Additions) recoveries, net (146 ) 545 Valuation allowance at end of period (385 ) (239 ) Mortgage servicing rights, net $ 66,175 $ 68,193 Fair value of mortgage servicing rights $ 69,839 $ 81,012 Portfolio of residential mortgage loans serviced for others (“servicing portfolio”) $ 8,503,844 $ 8,600,983 Mortgage servicing rights, net to servicing portfolio 0.78 % 0.79 % Mortgage servicing rights expense (a) $ 5,593 $ 9,049 (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 in 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 June 30, 2019 . 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: Estimated Amortization Expense Core Deposit Intangibles Other Intangibles Mortgage Servicing Rights ($ in Thousands) Six Months Ending December 31, 2019 $ 4,036 $ 1,367 $ 5,157 2020 8,073 2,707 11,191 2021 8,073 2,682 9,387 2022 8,073 2,659 7,835 2023 8,073 2,640 6,529 2024 8,073 2,620 5,443 Beyond 2024 27,909 6,931 21,018 Total Estimated Amortization Expense $ 72,310 $ 21,605 $ 66,560

Short and Long-Term Funding

Short and Long-Term Funding	6 Months Ended
	Jun. 30, 2019
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): June 30, 2019 December 31, 2018 ($ in Thousands) Short-Term Funding Federal funds purchased $ 7,010 $ 19,710 Securities sold under agreements to repurchase 76,185 91,941 Federal funds purchased and securities sold under agreements to repurchase 83,195 111,651 Commercial paper 28,787 45,423 Total short-term funding $ 111,983 $ 157,074 Long-Term Funding Corporation senior notes, at par, due 2019 $ 250,000 $ 250,000 Bank senior notes, at par, due 2021 300,000 300,000 Corporation subordinated notes, at par, due 2025 250,000 250,000 Other long-term funding and capitalized costs (3,597 ) (4,389 ) Total long-term funding 796,403 795,611 Total short and long-term funding, excluding FHLB advances $ 908,386 $ 952,685 FHLB Advances Short-term FHLB advances $ 80,000 $ 900,000 Long-term FHLB advances 2,662,941 2,674,371 Total FHLB advances $ 2,742,941 $ 3,574,371 Total short and long-term funding $ 3,651,327 $ 4,527,056 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 June 30, 2019 , the Corporation pledged agency mortgage-related securities with a fair value of $143 million as collateral for the repurchase agreements. Securities pledged as collateral under repurchase agreements are maintained with the Corporation's safekeeping agents and are monitored on a daily basis due to the market risk of fair value changes in the underlying securities. The Corporation generally pledges excess securities to ensure there is sufficient collateral to satisfy short-term fluctuations in both the repurchase agreement balances and the fair value of the underlying securities. The remaining contractual maturity of the securities sold under agreements to repurchase in the consolidated balance sheets as of June 30, 2019 and December 31, 2018 are presented in the following table: Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to 30 days 30-90 days Greater than 90 days Total ($ in Thousands) June 30, 2019 Repurchase agreements Agency mortgage-related securities $ 76,185 $ — $ — $ — $ 76,185 Total $ 76,185 $ — $ — $ — $ 76,185 December 31, 2018 Repurchase agreements Agency mortgage-related securities $ 91,941 $ — $ — $ — $ 91,941 Total $ 91,941 $ — $ — $ — $ 91,941 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. In November 2014, the Corporation issued $250 million of senior notes, due November 2019, and callable October 2019. The senior notes have a fixed coupon interest rate of 2.75% 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. FHLB Advances At June 30, 2019 , the Corporation had $2.7 billion of FHLB advances, down $ 831 million from December 31, 2018 . As of June 30, 2019 , the Corporation had $2.6 billion of putable FHLB advances with a one-time option where the FHLB can call the advance prior to the contractual maturity. The contractual weighted average life to the put date of these advances was 0.59 year s, with put dates ranging from 2019 through 2020. The weighted average life to contractual maturity on these advances was 5.69 years, with those dates ranging from 2022 through 2028. As of June 30, 2019 , due to the lower rate environment, it is probable that many of these advances will not be called by the FHLB and will extend to their final maturities. The original contractual maturity or next put date of the Corporation's FHLB advances as of June 30, 2019 and December 31, 2018 are presented in the following table: June 30, 2019 December 31, 2018 Amount Weighted Average Contractual Coupon Rate Amount Weighted Average Contractual Coupon Rate ($ in Thousands) Maturity or put date 1 year or less $ 2,441,050 2.27 % $ 2,262,584 2.06 % After 1 but within 2 288,248 2.57 % 1,285,039 2.39 % After 2 but within 3 4,811 5.21 % 14,393 2.98 % After 3 years 8,833 3.36 % 12,354 4.55 % FHLB advances and overall rate $ 2,742,941 2.31 % $ 3,574,371 2.19 %

Derivative and Hedging Activiti

Derivative and Hedging Activities	6 Months Ended
	Jun. 30, 2019
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 $43 million of investment securities as collateral at June 30, 2019 , and pledged $36 million of investment securities as collateral at December 31, 2018 . At June 30, 2019 , the Corporation posted $11 million of cash collateral compared to $1 million at December 31, 2018 . 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 uses 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 involve 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 are recognized in interest income. 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. Written and Purchased Options (Time Deposit) Historically, the Corporation had entered into written and purchased option derivative instruments to facilitate an equity linked time deposit product (the “Power CD”), which the Corporation ceased offering in September 2013. The Power CD was a time deposit that provided the purchaser a guaranteed return of principal at maturity plus a potential equity return (a written option), while the Corporation received a known stream of funds based on the equity return (a purchased option). The written and purchased options are mirror derivative instruments, which are carried at fair value on the consolidated balance sheets. The table below identifies the consolidated balance sheets category and fair values of the Corporation’s derivative instruments: June 30, 2019 December 31, 2018 ($ in Thousands) Notional Amount Fair Consolidated Notional Amount Fair Consolidated Derivatives not designated as hedging instruments Interest rate-related instruments — customer and mirror $ 2,761,552 $ 77,264 Other assets $ 2,707,204 $ 52,796 Other assets Interest rate-related instruments — customer and mirror 2,761,552 (15,013 ) Other liabilities 2,707,204 (52,653 ) Other liabilities Foreign currency exchange forwards 166,935 2,683 Other assets 117,879 721 Other assets Foreign currency exchange forwards 159,340 (2,425 ) Other liabilities 69,153 (675 ) Other liabilities Commodity contracts 258,928 22,498 Other assets 331,727 35,426 Other assets Commodity contracts 258,485 (22,076 ) Other liabilities 315,861 (34,340 ) Other liabilities Interest rate lock commitments (mortgage) 396,130 4,869 Other assets 191,222 2,208 Other assets Forward commitments (mortgage) 333,060 (1,903 ) Other liabilities 139,984 (2,072 ) Other liabilities Purchased options (time deposit) 4,814 126 Other assets 11,185 109 Other assets Written options (time deposit) 4,814 (126 ) Other liabilities 11,185 (109 ) Other liabilities Derivatives designated as hedging instruments Interest Rate Products 500,000 69 Other assets 500,000 (40 ) Other liabilities The following table presents amounts that were recorded on the consolidated balance sheets related to cumulative basis adjustment for fair value hedges: Line Item in the Statement of Financial Position in Which the Hedged Item is Included Carrying Amount of the Hedged Assets/(Liabilities) Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities) ($ in Thousands) June 30, 2019 Loans and investment securities receivables (a) $ 505,659 $ 5,659 Total $ 505,659 $ 5,659 (a) These amounts include the amortized cost basis of closed portfolios used to designated hedging relationships in which the hedged item is the last layer expected to be remaining at the end of the hedging relationship. At June 30, 2019 , the amortized cost basis of the closed portfolios used in these hedging relationships was $994 million ; the positive cumulative basis adjustments associated with these hedging relationships was $6 million; and the amounts of the designated hedged items were $500 million . The table below identifies the effect of fair value hedge accounting on the Corporation's consolidated statements of income for the three and six months ended June 30, 2019 and 2018 : Location and Amount of Gain or (Loss) Recognized in Income on Fair Value and Cash Flow Hedging Relationships Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 ($ in Thousands) Interest Income Other Income (Expense) Interest Income Other Income (Expense) Interest Income Other Income (Expense) Interest Income Other Income (Expense) Total amounts of income and expense line items presented in the consolidated statements of income in which the effects of the fair value hedge is recorded $ 53 $ — $ 5 $ — $ 219 $ — $ (13 ) $ — The effects of fair value hedging: Gain or (loss) on fair value hedging relationships in Subtopic 815-20 Interest contracts Hedged items 4,165 — (2,133 ) — 6,222 — (2,409 ) — Derivatives designated as hedging instruments (a) (4,112 ) — 2,138 — (6,003 ) — 2,396 — (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 and six months ended June 30, 2019 and 2018 : Consolidated Statements of Income Category of Gain / (Loss) Recognized in Income Three Months Ended June 30, Six Months Ended June 30, ($ in Thousands) 2019 2018 2019 2018 Derivative Instruments Interest rate-related instruments — customer and mirror, net Capital markets, net $ (1,018 ) $ (384 ) $ (1,690 ) $ 108 Foreign currency exchange forwards Capital markets, net 186 98 212 70 Commodity contracts Capital markets, net (97 ) (1,050 ) (664 ) (886 ) Interest rate lock commitments (mortgage) Mortgage banking, net 1,837 255 2,661 1,749 Forward commitments (mortgage) Mortgage banking, net (78 ) (616 ) 169 (606 )

Balance Sheet Offsetting

Balance Sheet Offsetting	6 Months Ended
	Jun. 30, 2019
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. The Corporation does not offset assets and liabilities under these arrangements for financial statement presentation purposes. 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 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 of recognized assets Gross amounts not offset in the consolidated balance sheets ($ in Thousands) Gross amounts offset in the consolidated balance sheets Net amounts presented in the consolidated balance sheets Derivative liability available for offset Collateral received Net amount Derivative assets (a) June 30, 2019 $ 17,504 $ — $ 17,504 $ (6,693 ) $ (8,339 ) $ 2,472 December 31, 2018 65,596 — 65,596 (22,873 ) (41,879 ) 843 Gross amounts of recognized liabilities Gross amounts not offset ($ in Thousands) Gross amounts Net amounts Derivative asset available for offset Collateral pledged Net amount Derivative liabilities (a) June 30, 2019 $ 17,045 $ — $ 17,045 $ (6,693 ) $ (10,179 ) $ 174 December 31, 2018 22,951 — 22,951 (22,873 ) (63 ) 16 (a) Includes interest, commodity, and foreign exchange agreements

Commitments, Off-Balance Sheet

Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters	6 Months Ended
	Jun. 30, 2019
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: June 30, 2019 December 31, 2018 ($ in Thousands) Commitments to extend credit, excluding commitments to originate residential mortgage loans held for sale (a)(b) $ 8,902,027 $ 8,720,293 Commercial letters of credit (a) 6,951 7,599 Standby letters of credit (c) 264,541 255,904 (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 is not material at June 30, 2019 or December 31, 2018 . (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 and $2 million at June 30, 2019 and December 31, 2018 , respectively, 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 estimated probable losses related to unfunded commitments (including unfunded loan commitments and letters of credit). The allowance for unfunded commitments totaled $22 million at June 30, 2019 and $24 million at December 31, 2018 , and is included in accrued expenses and other liabilities on the consolidated balance sheets. 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 is 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, and new market projects for the purpose of community reinvestment and obtaining tax credits and other tax benefits. Return on the Corporation's investment in these projects comes in the form of the tax credits and tax losses that pass through to the Corporation. The aggregate carrying value of these investments at June 30, 2019 was $196 million , compared to $136 million at December 31, 2018 , included in investment in unconsolidated subsidiaries 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 $10 million and $9 million for the six months ended June 30, 2019 and 2018 , respectively, and $5 million for both the three months ended June 30, 2019 and 2018 . The Corporation's remaining investment in qualified affordable housing projects accounted for under the proportional amortization method totaled $187 million at June 30, 2019 and $132 million at December 31, 2018 . 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 $95 million and $51 million at June 30, 2019 and December 31, 2018 , respectively. For the six months ended June 30, 2019 and the year ended December 31, 2018 , 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 $26 million and $25 million at June 30, 2019 and December 31, 2018 , respectively, included in investment in unconsolidated subsidiaries 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 with respect to such legal proceedings, intends to continue to defend itself vigorously. The Corporation will consider settlement of cases when, in management’s judgment, it is in the best interests of both 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 $771 thousand during the six months ended June 30, 2019 and $2 million for the year ended December 31, 2018 . The loss reimbursement and settlement claims paid for the six months ended June 30, 2019 and for the year ended December 31, 2018 were negligible . Make whole requests during 2018 and the first six months of 2019 generally arose from loans sold during the period of January 1, 2012 to December 31, 2018 . Since January 1, 2012, loans sold totaled $11.6 billion at the time of sale, and consisted primarily of loans sold to GSEs. As of June 30, 2019 , approximately $7.3 billion of these sold loans remain outstanding. The balance in the mortgage repurchase reserve at the balance sheet date reflects the estimated amount of potential loss the Corporation could incur from repurchasing a loan, as well as loss reimbursements, indemnifications, and other settlement resolutions. The following summarizes the changes in the mortgage repurchase reserve for the six months ended June 30, 2019 and for the year ended December 31, 2018 : Six Months Ended June 30, 2019 Year Ended December 31, 2018 ($ in Thousands) Balance at beginning of period $ 752 $ 987 Repurchase provision expense 128 345 Adjustments to provision expense — (450 ) Repurchase/reimbursement charges taken (174 ) (218 ) Amount recorded at acquisition — 88 Balance at end of period $ 706 $ 752 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 June 30, 2019 and December 31, 2018 , there were approximately $34 million and $47 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 June 30, 2019 and December 31, 2018 , there were $51 million and $57 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	6 Months Ended
	Jun. 30, 2019
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 utilizes interest rate swaps to hedge exposure to interest rate risk and variability of fair value related to changes in the underlying interest rate of the hedged item. These hedged interest rate swaps are classified as fair value hedges. See Note 10 for additional disclosure regarding the Corporation’s fair value hedges. In addition, 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 June 30, 2019 and December 31, 2018 , 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 commodity 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 June 30, 2019 and December 31, 2018 , 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 June 30, 2019 and December 31, 2018 , aggregated by the level in the fair value hierarchy within which those measurements fall: Fair Value Hierarchy June 30, 2019 December 31, 2018 ($ in Thousands) Assets Investment securities available for sale U.S. Treasury securities Level 1 $ — $ 999 Residential mortgage-related securities FNMA / FHLMC Level 2 183,722 295,252 GNMA Level 2 1,331,633 2,128,531 Private-label Level 2 814 1,003 Commercial mortgage-related securities FNMA / FHLMC Level 2 21,102 — GNMA Level 2 1,470,048 1,220,797 FFELP asset backed securities Level 2 273,137 297,360 Other debt securities Level 2 3,000 3,000 Total investment securities available for sale Level 1 — 999 Total investment securities available for sale Level 2 3,283,456 3,945,943 Equity securities with readily determinable fair values Level 1 1,621 1,568 Residential loans held for sale Level 2 129,303 64,321 Interest rate-related instruments Level 2 77,264 52,796 Foreign currency exchange forwards Level 2 2,683 721 Commodity contracts Level 2 22,498 35,426 Purchased options (time deposit) Level 2 126 109 Interest rate products (designated as hedging instruments) Level 2 69 — Interest rate lock commitments to originate residential mortgage loans held for sale Level 3 4,869 2,208 Liabilities Interest rate-related instruments Level 2 $ 15,013 $ 52,653 Foreign currency exchange forwards Level 2 2,425 675 Commodity contracts Level 2 22,076 34,340 Written options (time deposit) Level 2 126 109 Interest rate products (designated as hedging instruments) Level 2 — 40 Forward commitments to sell residential mortgage loans Level 3 1,903 2,072 The table below presents a rollforward of the consolidated balance sheets amounts for the six months ended June 30, 2019 and the year ended December 31, 2018 , for financial instruments measured on a recurring basis and classified within Level 3 of the fair value hierarchy: Derivative Financial Instruments ($ in Thousands) Balance December 31, 2017 $ 1,225 Total net gains (losses) included in income Mortgage derivative gain (loss) (1,085 ) Balance December 31, 2018 $ 140 Total net gains (losses) included in income Mortgage derivative gain (loss) 2,830 Balance June 30, 2019 $ 2,969 For Level 3 assets and liabilities measured at fair value on a recurring basis as of June 30, 2019 , 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 June 30, 2019 , 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. Other Real Estate Owned: Certain other real estate owned, 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 other real estate owned, less estimated selling costs. The fair value of other real estate owned, upon initial recognition or subsequent impairment, was estimated using appraised values, 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 June 30, 2019 , the Corporation utilized the following valuation techniques and significant unobservable inputs: Impaired Loans: The Corporation considers a loan impaired when it is probable that the Corporation will be unable to collect all amounts due according to the original contractual terms of the note agreement, including both principal and interest. Management has determined that commercial and consumer loan relationships that have nonaccrual status or have had their terms restructured in a troubled debt restructuring meet this impaired loan definition. For individually evaluated impaired loans, the amount of impairment is based upon the present value of expected future cash flows discounted at the loan’s effective interest rate, the estimated fair value of the underlying collateral for collateral-dependent loans, or the estimated liquidity of the note. See Note 7 for additional information regarding the Corporation’s impaired loans. Mortgage Servicing Rights: MSR do not trade in an active, open market with readily observable prices. While sales of mortgage servicing rights 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 mortgage servicing rights. The valuation model incorporates prepayment assumptions to project mortgage servicing rights cash flows based on the current interest rate scenario, which is then discounted to estimate an expected fair value of the mortgage servicing rights. 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 mortgage servicing rights, where available, and to recent market activity and actual portfolio experience. Due to the nature of the valuation inputs, mortgage servicing rights 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 mortgage servicing rights assets. The discounted cash flow analyses that generate expected market prices utilize the observable characteristics of the mortgage servicing rights portfolio, as well as certain unobservable valuation parameters. The significant unobservable inputs used in the fair value measurement of the Corporation’s mortgage servicing rights 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 mortgage servicing rights. Equity Securities Without Readily Determinable Fair Value: 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 are 77,000 Visa Class B restricted shares carried at fair value. These 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 77,000 shares of Visa Class B to convert to 125,495 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 June 30, 2019 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 June 30, 2019 : ($ in Thousands) Equity securities without readily determinable fair values Carrying value as of December 31, 2018 $ — Upward carrying value changes 13,444 Carrying value as of June 30, 2019 $ 13,444 Cumulative upward carrying value changes between January 1, 2018 and June 30, 2019 $ 13,444 Cumulative downward carrying value changes/impairment between January 1, 2018 and June 30, 2019 $ — 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 Category of Adjustment Recognized in Income Adjustment Recognized in the Consolidated Statements of Income ($ in Thousands) Fair Value Hierarchy Fair Value June 30, 2019 Assets Impaired loans (a) Level 3 $ 74,931 Provision for credit losses (b) $ (42,735 ) Other real estate owned (c) Level 2 519 Foreclosure / OREO expense, net (1,115 ) Mortgage servicing rights Level 3 69,839 Mortgage banking, net (146 ) Equity securities Level 3 13,444 Investment securities gains (losses), net 13,444 December 31, 2018 Assets Impaired loans (a) Level 3 $ 26,191 Provision for credit losses (b) $ (14,521 ) Other real estate owned (c) Level 2 2,200 Foreclosure / OREO expense, net (1,545 ) Mortgage servicing rights Level 3 81,012 Mortgage banking, net 545 (a) Represents individually evaluated impaired loans, net of the related allowance for loan losses. (b) Represents provision for credit losses on individually evaluated impaired loans. (c) 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. Certain nonfinancial assets and nonfinancial liabilities measured at fair value on a nonrecurring basis include the fair value analysis in the second step of a 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 mortgage servicing rights and impaired loans. The table below presents information about these inputs and further discussion is found above: Valuation Technique Significant Unobservable Input Weighted Average Input Applied June 30, 2019 Mortgage servicing rights Discounted cash flow Discount rate 11% Mortgage servicing rights Discounted cash flow Constant prepayment rate 12% Impaired Loans Appraisals / Discounted cash flow Collateral / Discount factor 34% 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: June 30, 2019 December 31, 2018 Fair Value Hierarchy Level Carrying Amount Fair Value Carrying Amount Fair Value ($ in Thousands) Financial assets Cash and due from banks Level 1 $ 382,985 $ 382,985 $ 507,187 $ 507,187 Interest-bearing deposits in other financial institutions Level 1 172,708 172,708 221,226 221,226 Federal funds sold and securities purchased under agreements to resell Level 1 1,385 1,385 148,285 148,285 Investment securities held to maturity Level 1 999 1,019 — — Investment securities held to maturity Level 2 2,805,066 2,873,739 2,740,511 2,710,271 Investment securities available for sale Level 1 — — 999 999 Investment securities available for sale Level 2 3,283,456 3,283,456 3,945,943 3,945,943 Equity securities with readily determinable fair values Level 1 1,621 1,621 1,568 1,568 Equity securities without readily determinable fair values Level 3 13,444 13,444 — — FHLB and Federal Reserve Bank stocks Level 2 202,758 202,758 250,534 250,534 Residential loans held for sale Level 2 129,303 129,303 64,321 64,321 Commercial loans held for sale Level 2 11,000 11,000 14,943 14,943 Loans, net Level 3 23,016,308 22,767,412 22,702,406 22,317,395 Bank and corporate owned life insurance Level 2 668,638 668,638 663,203 663,203 Derivatives (other assets) Level 2 102,641 102,641 89,052 89,052 Interest rate lock commitments to originate residential mortgage loans held for sale Level 3 4,869 4,869 2,208 2,208 Financial liabilities Noninterest-bearing demand, savings, interest-bearing demand, and money market accounts Level 3 $ 21,906,970 $ 21,906,970 $ 22,081,992 $ 22,081,992 Brokered CDs and other time deposits (a) Level 2 3,367,252 3,373,332 2,815,401 2,815,401 Short-term funding (b) Level 2 111,983 111,983 157,074 157,074 Long-term funding Level 2 796,403 840,323 795,611 826,612 FHLB advances Level 2 2,742,941 2,781,103 3,574,371 3,565,572 Standby letters of credit (c) Level 2 2,693 2,693 2,482 2,482 Derivatives (other liabilities) Level 2 39,641 39,641 87,817 87,817 Forward commitments to sell residential mortgage loans Level 3 1,903 1,903 2,072 2,072 (a) When the estimated fair value is less than the carrying value, the carrying value is reported as the fair value. (b) The carrying amount is a reasonable estimate of fair value for existing short-term funding. (c) The commitment on standby letters of credit was $265 million at June 30, 2019 and $256 million at December 31, 2018 . 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	6 Months Ended
	Jun. 30, 2019
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. Bank Mutual was acquired on February 1, 2018. The Bank Mutual Pension Plan was merged into the RAP on December 31, 2018. Bank Mutual's Postretirement Plan was merged into the Corporation's Postretirement Plan during the first quarter of 2018. The reported figures in 2018 for both the Bank Mutual Pension Plan and the Corporation's Postretirement Plan only include five months of Bank Mutual expense due to the timing of the Bank Mutual acquisition. 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. The components of net periodic pension cost and net periodic benefit cost for the RAP, Bank Mutual Pension Plan, and Postretirement Plan for the three and six months ended June 30, 2019 and 2018 were as follows: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 ($ in Thousands) Components of Net Periodic Benefit Cost RAP Service cost $ 1,925 $ 1,893 $ 3,850 $ 3,785 Interest cost 2,413 1,660 4,825 3,320 Expected return on plan assets (6,075 ) (4,755 ) (12,150 ) (9,510 ) Amortization of prior service cost (19 ) (19 ) (38 ) (38 ) Amortization of actuarial loss 65 463 130 925 Total net periodic pension cost $ (1,691 ) $ (759 ) $ (3,383 ) $ (1,518 ) Bank Mutual Pension Plan Interest cost N/A 650 N/A $ 1,083 Expected return on plan assets N/A (1,060 ) N/A (1,592 ) Total net periodic pension cost N/A $ (410 ) N/A $ (509 ) Postretirement Plan Interest cost $ 26 $ 27 $ 52 $ 53 Amortization of prior service cost (19 ) (19 ) (38 ) (38 ) Amortization of actuarial loss (1 ) 2 (2 ) 4 Total net periodic benefit cost $ 6 $ 10 $ 13 $ 19 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 in 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 six months ended June 30, 2019 . The Corporation made a $31 million contribution to the Bank Mutual Pension Plan during the six months ended June 30, 2018 .

Segment Reporting

Segment Reporting	6 Months Ended
	Jun. 30, 2019
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 2018 Annual Report on Form 10-K, 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 incurred loss model using the methodologies described in the Corporation’s 2018 Annual Report on Form 10-K to assess the overall appropriateness of the allowance for loan losses. 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 CDI and other intangible assets associated with acquisitions) 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 2018 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. The Community, Consumer, and Business segment serves individuals, as well as small and mid-sized businesses. 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). In addition, the Risk Management and Shared Services segment includes certain unallocated expenses related to Bank Mutual's shared services and operations prior to system conversion in late June 2018. All Bank Mutual and Huntington branch acquisition related costs are included in the Risk Management and Shared Services segment. Information about the Corporation’s segments is presented below: Corporate and Commercial Specialty Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 ($ in Thousands) Net interest income $ 115,648 $ 121,985 $ 231,557 $ 226,420 Net intersegment interest income (expense) (20,061 ) (14,656 ) (42,683 ) (23,133 ) Segment net interest income 95,587 107,330 188,874 203,287 Noninterest income 14,318 14,194 25,763 26,876 Total revenue 109,904 121,524 214,637 230,163 Credit provision 13,317 11,126 26,802 21,723 Noninterest expense 40,022 41,775 78,810 81,025 Income (loss) before income taxes 56,566 68,623 109,026 127,415 Income tax expense (benefit) 10,864 13,454 20,866 24,880 Net income $ 45,702 $ 55,169 $ 88,159 $ 102,535 Allocated goodwill $ 525,798 $ 523,284 Community, Consumer, and Business Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 ($ in Thousands) Net interest income $ 84,874 $ 90,418 $ 172,946 $ 176,813 Net intersegment interest income (expense) 25,586 24,202 49,028 41,350 Segment net interest income 110,461 114,620 221,974 218,163 Noninterest income 78,335 76,250 152,559 150,286 Total revenue 188,796 190,870 374,533 368,449 Credit provision 4,966 4,880 10,000 9,846 Noninterest expense 138,415 138,553 269,405 265,700 Income (loss) before income taxes 45,415 47,437 95,128 92,904 Income tax expense (benefit) 9,540 9,962 19,983 19,510 Net income $ 35,874 $ 37,475 $ 75,145 $ 73,394 Allocated goodwill $ 650,221 $ 643,382 Information about the Corporation’s segments is presented below: (continued) Risk Management and Shared Services Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 ($ in Thousands) Net interest income $ 13,097 $ 13,959 $ 24,664 $ 33,000 Net intersegment interest income (expense) (5,525 ) (9,546 ) (6,345 ) (18,217 ) Segment net interest income 7,572 4,413 18,318 14,783 Noninterest income 3,185 2,399 8,718 6,059 Total revenue 10,757 6,812 27,036 20,842 Credit provision (10,283 ) (12,006 ) (22,801 ) (27,569 ) Noninterest expense (a) 19,343 30,929 41,236 77,498 Income (loss) before income taxes 1,697 (12,111 ) 8,602 (29,087 ) Income tax expense (benefit) (1,387 ) (8,661 ) 560 (11,806 ) Net income $ 3,084 $ (3,450 ) $ 8,042 $ (17,280 ) Allocated goodwill $ — $ — Consolidated Total Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 ($ in Thousands) Net interest income $ 213,619 $ 226,362 $ 429,167 $ 436,233 Net intersegment interest income (expense) — — — — Segment net interest income 213,619 226,362 429,167 436,233 Noninterest income 95,837 92,842 187,040 183,222 Total revenue 309,457 319,204 616,206 619,455 Credit provision 8,000 4,000 14,000 4,000 Noninterest expense 197,779 211,258 389,450 424,223 Income (loss) before income taxes 103,678 103,947 212,756 191,232 Income tax expense (benefit) 19,017 14,754 41,409 32,583 Net income $ 84,661 $ 89,192 $ 171,347 $ 158,648 Allocated goodwill $ 1,176,019 $ 1,166,665 (a) For the three months ended June 30, 2019 and 2018 , the Risk Management and Shared Services segment includes approximately $4 million and $7 million , respectively, of acquisition related noninterest expense. For the six months ended June 30, 2019 and 2018 , the Risk Management and Shared Services segment includes approximately $4 million and $28 million , respectively, of acquisition related noninterest expense.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	6 Months Ended
	Jun. 30, 2019
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 June 30, 2019 and 2018 respectively, including changes during the preceding six and three month periods as well as any reclassifications out of accumulated other comprehensive income (loss): ($ in Thousands) Investment Securities Available For Sale Defined Benefit Pension and Post Retirement Obligations Accumulated Other Comprehensive Income (Loss) Balance January 1, 2019 $ (75,643 ) $ (49,330 ) $ (124,972 ) Other comprehensive income (loss) before reclassifications 89,966 — 89,966 Amounts reclassified from accumulated other comprehensive income (loss) Investment securities losses (gains), net (2,143 ) — (2,143 ) Personnel expense — (75 ) (75 ) Other expense — 128 128 Amortization of net unrealized (gains) losses on available for sale securities transferred to held to maturity securities 288 — 288 Income tax (expense) benefit (22,242 ) (13 ) (22,255 ) Net other comprehensive income (loss) during period 65,869 40 65,909 Balance June 30, 2019 $ (9,773 ) $ (49,290 ) $ (59,063 ) Balance January 1, 2018 $ (38,453 ) $ (24,305 ) $ (62,758 ) Other comprehensive income (loss) before reclassifications (60,754 ) — (60,754 ) Amounts reclassified from accumulated other comprehensive income (loss) Investment securities loss (gain), net 2,015 — 2,015 Personnel expense — (76 ) (76 ) Other expense — 929 929 Adjustment for adoption of ASU 2016-01 (84 ) — (84 ) Adjustment for adoption of ASU 2018-02 (8,419 ) (5,235 ) (13,654 ) Amortization of net unrealized (gains) losses on available for sale securities transferred to held to maturity securities (632 ) — (632 ) Income tax (expense) benefit 15,340 (216 ) 15,124 Net other comprehensive income (loss) during period (52,533 ) (4,597 ) (57,130 ) Balance June 30, 2018 $ (90,986 ) $ (28,902 ) $ (119,888 ) ($ in Thousands) Investments Defined Benefit Accumulated Balance April 1, 2019 $ (54,065 ) $ (49,310 ) $ (103,375 ) Other comprehensive income (loss) before reclassifications 59,476 — 59,476 Amounts reclassified from accumulated other comprehensive income (loss) Investment securities losses (gains), net (463 ) — (463 ) Personnel expense — (38 ) (38 ) Other expense — 64 64 Amortization of net unrealized (gains) losses on available for sale securities transferred to held to maturity securities 218 — 218 Income tax (expense) benefit (14,940 ) (7 ) (14,947 ) Net other comprehensive income (loss) during period 44,292 20 44,311 Balance June 30, 2019 $ (9,773 ) $ (49,290 ) $ (59,063 ) Balance April 1, 2018 $ (78,453 ) $ (29,220 ) $ (107,673 ) Other comprehensive income (loss) before reclassifications (18,919 ) — (18,919 ) Amounts reclassified from accumulated other comprehensive income (loss) Investment securities loss (gain), net 2,015 — 2,015 Personnel expense — (38 ) (38 ) Other expense — 465 465 Amortization of net unrealized (gains) losses on available for sale securities transferred to held to maturity securities (335 ) — (335 ) Income tax (expense) benefit 4,705 (109 ) 4,596 Net other comprehensive income (loss) during period (12,533 ) 318 (12,215 ) Balance June 30, 2018 $ (90,986 ) $ (28,902 ) $ (119,888 )

Revenue from Contracts with Cus

Revenue from Contracts with Customers	6 Months Ended
	Jun. 30, 2019
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 June 30, Six Months Ended June 30, 2019 2018 2019 2018 ($ in Thousands) Insurance commissions and fees $ — $ — $ — $ — Wealth management fees — — — — Service charges and deposit account fees 3,195 3,786 6,583 8,011 Card-based fees (a) 338 347 666 661 Other revenue (1,016 ) (813 ) (1,284 ) (157 ) Noninterest Income (in-scope of Topic 606) $ 2,517 $ 3,320 $ 5,964 $ 8,515 Noninterest Income (out-of-scope of Topic 606) 11,801 10,874 19,799 18,361 Total Noninterest Income $ 14,318 $ 14,194 $ 25,763 $ 26,876 Community, Consumer, and Business Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 ($ in Thousands) Insurance commissions and fees $ 22,982 $ 23,988 $ 48,442 $ 46,612 Wealth management fees 20,691 20,307 40,870 40,708 Service charges and deposit account fees 12,218 12,590 23,926 24,773 Card-based fees (a) 9,791 9,806 18,709 18,960 Other revenue 2,740 2,657 5,372 5,493 Noninterest Income (in-scope of Topic 606) $ 68,421 $ 69,349 $ 137,320 $ 136,547 Noninterest Income (out-of-scope of Topic 606) 9,914 6,901 15,239 13,739 Total Noninterest Income $ 78,335 $ 76,250 $ 152,559 $ 150,286 The Corporation's disaggregated revenue by major source is presented below: (continued) Risk Management and Shared Services Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 ($ in Thousands) Insurance commissions and fees $ 3 $ 7 $ 7 $ 32 Wealth management fees — 26 — 267 Service charges and deposit account fees 14 13 32 25 Card-based fees (a) 48 3 97 6 Other revenue 119 108 239 160 Noninterest Income (in-scope of Topic 606) $ 184 $ 156 $ 375 $ 490 Noninterest Income (out-of-scope of Topic 606) 3,000 2,242 8,343 5,570 Total Noninterest Income $ 3,185 $ 2,399 $ 8,718 $ 6,059 Consolidated Total Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 ($ in Thousands) Insurance commissions and fees $ 22,985 $ 23,996 $ 48,449 $ 46,644 Wealth management fees 20,691 20,333 40,870 40,975 Service charges and deposit account fees 15,426 16,390 30,542 32,810 Card-based fees (a) 10,177 10,155 19,472 19,628 Other revenue 1,843 1,952 4,327 5,496 Noninterest Income (in-scope of Topic 606) $ 71,122 $ 72,825 $ 143,660 $ 145,553 Noninterest Income (out-of-scope of Topic 606) 24,715 20,017 43,380 37,670 Total Noninterest Income $ 95,837 $ 92,842 $ 187,040 $ 183,222 (a) 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 on deposit accounts consist of monthly service fees (i.e. business analysis 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 on deposit accounts is 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 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	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Leases	Leases The Corporation has operating leases for retail and corporate offices, land, and equipment. 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 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 lease costs and cash flows resulting from operating lease are presented below: ($ in Thousands) Three Months Ended June 30, 2019 Six Months Ended June 30, 2019 Operating Lease Costs $ 2,888 $ 5,793 Operating Lease Cash Flows 2,762 5,570 The lease classifications on the consolidated balance sheets were as follows: June 30, 2019 ($ in Thousands) Amount Consolidated Balance Sheets Category Operating lease right-of-use asset $ 48,114 Premises and equipment Finance lease right-of-use asset — Other assets Operating lease liability 52,259 Accrued expenses and other liabilities Finance lease liability — Other long-term funding The lease payment obligations, weighted-average remaining lease term, and weighted-average discount rate were as follows: June 30, 2019 ($ in Thousands) Lease payments Weighted-average lease term (in years) Weighted-average discount rate Operating leases Equipment $ 256 1.10 2.73 % Retail and corporate offices 50,644 6.36 3.42 % Land 9,602 12.14 3.40 % Total operating leases $ 60,501 7.18 3.41 % 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) Amount Six Months Ending December 31, 2019 $ 6,447 2020 10,665 2021 9,942 2022 7,519 2023 5,379 Beyond 2023 20,550 Total lease payments 60,501 Less: interest 8,242 Present value of lease payments $ 52,259 As of June 30, 2019 , we have additional operating leases, primarily retail and corporate offices, that have not yet commenced of $16 million . These operating leases will commence between January 2020 and July 2023 with lease terms of 3 years to 6 years . Practical Expedients The Corporation elected several practical expedients made available by the FASB. Due to materiality, the Corporation elected not to restate comparative periods upon adoption of the new guidance. In addition, the Corporation elected the package of practical expedients whereby the Corporation did not reassess (i) whether existing contracts are, or contain, leases and (ii) lease classification for existing leases. Lastly, the Corporation elected not to separate lease and nonlease components in determining the consideration in the lease agreement.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2019
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Leases	Leases
New Accounting Pronouncements, Policy	New Accounting Pronouncements Adopted Standard Description Date of adoption Effect on financial statements ASU-2018-15 Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract The FASB issued an amendment which aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. The amendments in this Update require an entity (customer) in a hosting arrangement that is a service contract to follow the guidance in Subtopic 350-40 to determine which implementation costs to capitalize as an asset related to the service contract and which costs to expense. The amendments also require the entity (customer) to expense the capitalized implementation costs of a hosting arrangement that is a service contract over the term of the hosting arrangement. The amendment was effective for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years. Entities were required to apply the amendment either retrospectively or prospectively to all implementation costs incurred after the date of adoption. Early adoption was permitted. 1st Quarter 2019 The Corporation elected to early adopt this amendment using the prospective approach. No material impact on results of operation, financial position or liquidity. ASU 2018-09 Codification Improvements The FASB issued an amendment which affects a wide variety of Topics in the Codification. The amendments apply to all reporting entities within the scope of the affected accounting guidance. The amendments in this Update represent changes to clarify, correct errors in, or make minor improvements to the Codification. The amendments make the Codification easier to understand and easier to apply by eliminating inconsistencies and providing clarifications. The transition and effective date guidance is based on the facts and circumstances of each amendment. Some of the amendments in this Update did not require transition guidance and were effective upon issuance of this Update. However, many of the amendments in this Update did have transition guidance with effective dates for annual periods beginning after December 15, 2018. There are some conforming amendments in this Update that have been made to recently issued guidance that is not yet effective that may require application of the transition and effective date guidance in the original Accounting Standards Update. 1st Quarter 2019 No material impact on results of operations, financial position and liquidity. ASU 2016-02 Leases (Topic 842) The FASB issued an amendment to provide transparency and comparability among organizations by recognizing lease assets and lease liabilities on the consolidated balance sheets and disclosing key information about leasing arrangements. This amendment required lessees to recognize the following for all leases (with the exception of short-term leases) at the commencement date: 1) a lease liability, which is a lessee's obligation to make lease payments arising from a lease, measured on a discounted basis; and 2) a right-of-use asset, which is an asset that represents the lessee's right to use, or control the use of, a specified asset for the lease term. Under the new guidance, lessor accounting is largely unchanged. This amendment was effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2018. Entities are required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. The modified retrospective approach includes a number of optional practical expedients that entities could elect to apply. These practical expedients relate to the identification and classification of leases that commenced before the effective date, initial direct costs for leases that commenced before the effective date, and the ability to use hindsight in evaluating lessee options to extend or terminate a lease or to purchase the underlying asset. Early adoption was permitted. ASU 2018-01 permits an entity to elect an optional transition practical expedient to not evaluate under Topic 842 land easements that exist or expired before the entity's adoption of Topic 842. ASU 2018-10 was issued as improvements and clarifications of ASU 2016-02 were identified. This Update provides clarification on narrow aspects of the previously issued Updates. ASU 2018-11 was issued to provide entities with an additional (and optional) transition method to adopt the new leases standard under ASU 2016-02. ASU 2019-01 was issued to assist in determining the fair value of underlying asset by lessors, address the presentation to the statements of cash flows, and clarify transition disclosures related to Topic 250. 1st Quarter 2019 The Corporation has adopted this amendment utilizing a modified retrospective approach. At adoption, a right-of-use asset and corresponding lease liability were recognized on the consolidated balance sheets for $52 million and $56 million, respectively. See Note 18 for expanded disclosure requirements.

Acquisitions Acquisitions (Tabl

Acquisitions Acquisitions (Tables)	6 Months Ended
	Jun. 30, 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 Huntington branch acquisition: Purchase Accounting Adjustments June 14, 2019 ($ in Thousands) Assets Cash and cash equivalents $ — $ 551,250 Loans (1,552 ) 116,344 Premises and equipment, net 4,967 22,597 Goodwill 7,075 Core deposit intangibles (included in other intangible assets, net on the face of the Consolidated Balance Sheets) 22,630 22,630 Other real estate owned (included in other assets on the face of the Consolidated Balance Sheets) (2,561 ) 5,263 Others assets — 559 Total assets $ 725,719 Liabilities Deposits $ 156 $ 725,173 Other liabilities 70 546 Total liabilities $ 725,719

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	6 Months Ended
	Jun. 30, 2019
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: For the Three Months Ended June 30, For the Six Months Ended June 30, 2019 2018 2019 2018 (In Thousands, except per share data) Net income $ 84,661 $ 89,192 $ 171,347 $ 158,648 Preferred stock dividends (3,801 ) (2,329 ) (7,601 ) (4,668 ) Net income available to common equity $ 80,860 $ 86,863 $ 163,746 $ 153,980 Common shareholder dividends (27,571 ) (25,977 ) (55,650 ) (51,549 ) Unvested share-based payment awards (205 ) (130 ) (308 ) (269 ) Undistributed earnings $ 53,085 $ 60,756 $ 107,787 $ 102,162 Undistributed earnings allocated to common shareholders 52,690 60,446 107,098 101,677 Undistributed earnings allocated to unvested share-based payment awards 395 310 689 485 Undistributed earnings $ 53,085 $ 60,756 $ 107,787 $ 102,162 Basic Distributed earnings to common shareholders $ 27,571 $ 25,977 $ 55,650 $ 51,549 Undistributed earnings allocated to common shareholders 52,690 60,446 107,098 101,677 Total common shareholders earnings, basic $ 80,261 $ 86,423 $ 162,748 $ 153,226 Diluted Distributed earnings to common shareholders $ 27,571 $ 25,977 $ 55,650 $ 51,549 Undistributed earnings allocated to common shareholders 52,690 60,446 107,098 101,677 Total common shareholders earnings, diluted $ 80,261 $ 86,423 $ 162,748 $ 153,226 Weighted average common shares outstanding 162,180 170,633 163,049 167,096 Effect of dilutive common stock awards 1,492 2,146 1,469 2,080 Effect of dilutive common stock warrants — 630 — 744 Diluted weighted average common shares outstanding 163,672 173,409 164,518 169,920 Basic earnings per common share $ 0.49 $ 0.51 $ 1.00 $ 0.92 Diluted earnings per common share $ 0.49 $ 0.50 $ 0.99 $ 0.90

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2019
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 six months of 2019 and full year 2018 : 2019 2018 Dividend yield 3.30 % 2.50 % Risk-free interest rate 2.60 % 2.60 % Weighted average expected volatility 24.00 % 22.00 % Weighted average expected life 5.75 years 5.75 years Weighted average per share fair value of options $4.00 $4.47
Summary of company's stock option activities	A summary of the Corporation’s stock option activity for the six months ended June 30, 2019 is presented below: Stock Options Shares (a) Weighted Average Exercise Price Weighted Average Remaining Contractual Term Aggregate Intrinsic Value (a) Outstanding at December 31, 2018 5,281 $ 19.09 6.18 $ 12,392 Granted 1,050 22.77 Exercised (418 ) 15.68 Forfeited or expired (85 ) 23.96 Outstanding at June 30, 2019 5,828 $ 19.94 6.61 $ 14,870 Options Exercisable at June 30, 2019 3,631 $ 18.04 5.32 $ 14,016
Summary of restricted stock awards activity (excluding salary shares)	The following table summarizes information about the Corporation’s restricted stock awards activity for the six months ended June 30, 2019 : Restricted Stock Awards Shares (a) Weighted Average Grant Date Fair Value Outstanding at December 31, 2018 1,993 $ 21.92 Granted 1,164 22.21 Vested (673 ) 20.49 Forfeited (38 ) 24.14 Outstanding at June 30, 2019 2,446 $ 22.42

Investment Securities (Tables)

Investment Securities (Tables)	6 Months Ended
	Jun. 30, 2019
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 June 30, 2019 were as follows: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value ($ in Thousands) Investment securities available for sale Residential mortgage-related securities FNMA / FHLMC $ 182,893 $ 1,646 $ (817 ) $ 183,722 GNMA 1,325,739 7,942 (2,048 ) 1,331,633 Private-label 805 9 — 814 Commercial mortgage-related securities FNMA / FHLMC 20,244 858 — 21,102 GNMA 1,483,392 6,217 (19,562 ) 1,470,048 FFELP asset backed securities 274,520 152 (1,535 ) 273,137 Other debt securities 3,000 — — 3,000 Total investment securities available for sale $ 3,290,593 $ 16,825 $ (23,962 ) $ 3,283,456 Investment securities held to maturity U. S. Treasury securities $ 999 $ 20 $ — $ 1,019 Obligations of state and political subdivisions (municipal securities) 1,913,737 68,372 (152 ) 1,981,957 Residential mortgage-related securities FNMA / FHLMC 89,078 1,143 (145 ) 90,076 GNMA 321,046 3,430 (292 ) 324,184 GNMA commercial mortgage-related securities 481,205 7,264 (10,948 ) 477,521 Total investment securities held to maturity $ 2,806,064 $ 80,230 $ (11,537 ) $ 2,874,758 The amortized cost and fair values of securities available for sale and held to maturity at December 31, 2018 were as follows: Amortized Gross Gross Fair Value ($ in Thousands) Investment securities available for sale U. S. Treasury securities $ 1,000 $ — $ (1 ) $ 999 Residential mortgage-related securities FNMA / FHLMC 296,296 2,466 (3,510 ) 295,252 GNMA 2,169,943 473 (41,885 ) 2,128,531 Private-label 1,007 — (4 ) 1,003 GNMA commercial mortgage-related securities 1,273,309 — (52,512 ) 1,220,797 FFELP asset backed securities 297,347 711 (698 ) 297,360 Other debt securities 3,000 — — 3,000 Total investment securities available for sale $ 4,041,902 $ 3,649 $ (98,610 ) $ 3,946,941 Investment securities held to maturity Obligations of state and political subdivisions (municipal securities) $ 1,790,683 $ 8,255 $ (15,279 ) $ 1,783,659 Residential mortgage-related securities FNMA / FHLMC 92,788 169 (1,795 ) 91,162 GNMA 351,606 1,611 (8,181 ) 345,035 GNMA commercial mortgage-related securities 505,434 7,559 (22,579 ) 490,414 Total investment securities held to maturity $ 2,740,511 $ 17,593 $ (47,835 ) $ 2,710,271
Investment securities held to maturity	The amortized cost and fair values of securities available for sale and held to maturity at June 30, 2019 were as follows: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value ($ in Thousands) Investment securities available for sale Residential mortgage-related securities FNMA / FHLMC $ 182,893 $ 1,646 $ (817 ) $ 183,722 GNMA 1,325,739 7,942 (2,048 ) 1,331,633 Private-label 805 9 — 814 Commercial mortgage-related securities FNMA / FHLMC 20,244 858 — 21,102 GNMA 1,483,392 6,217 (19,562 ) 1,470,048 FFELP asset backed securities 274,520 152 (1,535 ) 273,137 Other debt securities 3,000 — — 3,000 Total investment securities available for sale $ 3,290,593 $ 16,825 $ (23,962 ) $ 3,283,456 Investment securities held to maturity U. S. Treasury securities $ 999 $ 20 $ — $ 1,019 Obligations of state and political subdivisions (municipal securities) 1,913,737 68,372 (152 ) 1,981,957 Residential mortgage-related securities FNMA / FHLMC 89,078 1,143 (145 ) 90,076 GNMA 321,046 3,430 (292 ) 324,184 GNMA commercial mortgage-related securities 481,205 7,264 (10,948 ) 477,521 Total investment securities held to maturity $ 2,806,064 $ 80,230 $ (11,537 ) $ 2,874,758 The amortized cost and fair values of securities available for sale and held to maturity at December 31, 2018 were as follows: Amortized Gross Gross Fair Value ($ in Thousands) Investment securities available for sale U. S. Treasury securities $ 1,000 $ — $ (1 ) $ 999 Residential mortgage-related securities FNMA / FHLMC 296,296 2,466 (3,510 ) 295,252 GNMA 2,169,943 473 (41,885 ) 2,128,531 Private-label 1,007 — (4 ) 1,003 GNMA commercial mortgage-related securities 1,273,309 — (52,512 ) 1,220,797 FFELP asset backed securities 297,347 711 (698 ) 297,360 Other debt securities 3,000 — — 3,000 Total investment securities available for sale $ 4,041,902 $ 3,649 $ (98,610 ) $ 3,946,941 Investment securities held to maturity Obligations of state and political subdivisions (municipal securities) $ 1,790,683 $ 8,255 $ (15,279 ) $ 1,783,659 Residential mortgage-related securities FNMA / FHLMC 92,788 169 (1,795 ) 91,162 GNMA 351,606 1,611 (8,181 ) 345,035 GNMA commercial mortgage-related securities 505,434 7,559 (22,579 ) 490,414 Total investment securities held to maturity $ 2,740,511 $ 17,593 $ (47,835 ) $ 2,710,271
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 June 30, 2019 are shown below: Available for Sale Held to Maturity Amortized Cost Fair Value Amortized Cost Fair Value ($ in Thousands) Due in one year or less $ 1,000 $ 1,000 $ 48,235 $ 48,393 Due after one year through five years 2,000 2,000 184,581 185,909 Due after five years through ten years — — 479,215 491,122 Due after ten years — — 1,202,705 1,257,552 Total debt securities 3,000 3,000 1,914,735 1,982,976 Residential mortgage-related securities FNMA / FHLMC 182,893 183,722 89,078 90,076 GNMA 1,325,739 1,331,633 321,046 324,184 Private-label 805 814 — — Commercial mortgage-related securities FNMA / FHLMC 20,244 21,102 — — GNMA 1,483,392 1,470,048 481,205 477,521 FFELP asset backed securities 274,520 273,137 — — Total investment securities $ 3,290,593 $ 3,283,456 $ 2,806,064 $ 2,874,758 Ratio of fair value to amortized cost 99.8 % 102.4 %
Realized gains and losses and proceeds from sale	nvestment 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 and write-up of investment securities for the six months ended June 30, 2019 and 2018 are shown below: Six Months Ended June 30, 2019 2018 ($ in Thousands) Gross gains on available for sale securities $ 2,334 $ — Gross gains on held to maturity securities — — Total gains 2,334 — Gross losses on available for sale securities (13,636 ) (2,015 ) Gross losses on held to maturity securities — — Total losses (13,636 ) (2,015 ) Write-up of equity securities without readily determinable fair values 13,444 — Investment securities gains (losses), net $ 2,143 $ (2,015 ) Proceeds from sales of investment securities $ 934,228 $ 493,060
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 June 30, 2019 : Less than 12 months 12 months or more Total Number of Securities Unrealized Losses Fair Value Number of Securities Unrealized Losses Fair Value Unrealized Losses Fair Value ($ in Thousands) Investment securities available for sale Residential mortgage-related securities FNMA / FHLMC 3 $ — $ 781 14 $ (817 ) $ 121,661 $ (817 ) $ 122,441 GNMA 2 (602 ) 53,013 13 (1,446 ) 316,714 (2,048 ) 369,727 GNMA commercial mortgage-related securities — — — 70 (19,562 ) 1,002,980 (19,562 ) 1,002,980 FFELP asset backed securities 16 (1,380 ) 205,710 1 (155 ) 5,839 (1,535 ) 211,550 Other debt securities 3 — 3,000 — — — — 3,000 Total 24 $ (1,982 ) $ 262,504 98 $ (21,979 ) $ 1,447,194 $ (23,962 ) $ 1,709,698 Investment securities held to maturity Obligations of state and political subdivisions (municipal securities) 8 $ (12 ) $ 3,962 50 $ (140 ) $ 25,109 $ (152 ) $ 29,071 Residential mortgage-related securities FNMA / FHLMC — — — 10 (145 ) 18,474 (145 ) 18,474 GNMA 1 (51 ) 6,956 27 (241 ) 35,339 (292 ) 42,295 GNMA commercial mortgage-related securities — — — 22 (10,948 ) 404,790 (10,948 ) 404,790 Total 9 $ (63 ) $ 10,918 109 $ (11,474 ) $ 483,712 $ (11,537 ) $ 494,630 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, 2018 : Less than 12 months 12 months or more Total Number Unrealized Fair Number Unrealized Fair Unrealized Fair ($ in Thousands) Investment securities available for sale U.S. Treasury securities — $ — $ — 1 $ (1 ) $ 999 $ (1 ) $ 999 Residential mortgage-related securities FNMA / FHLMC 15 (31 ) 17,993 17 (3,479 ) 189,405 (3,510 ) 207,398 GNMA 12 (4,529 ) 452,183 79 (37,355 ) 1,598,159 (41,885 ) 2,050,342 Private-label 1 (4 ) 1,003 — — — (4 ) 1,003 GNMA commercial mortgage-related securities — — — 93 (52,512 ) 1,220,854 (52,512 ) 1,220,854 FFELP asset backed securities 13 (698 ) 142,432 — — — (698 ) 142,432 Total 41 $ (5,262 ) $ 613,612 190 $ (93,347 ) $ 3,009,417 $ (98,610 ) $ 3,623,028 Investment securities held to maturity Obligations of state and political subdivisions (municipal securities) 272 $ (2,860 ) $ 313,212 752 $ (12,419 ) $ 509,374 $ (15,279 ) $ 822,586 Residential mortgage-related securities FNMA / FHLMC 13 (780 ) 57,896 22 (1,015 ) 28,888 (1,795 ) 86,784 GNMA 13 (414 ) 19,822 66 (7,767 ) 320,387 (8,181 ) 340,209 GNMA commercial mortgage-related securities — — — 25 (22,579 ) 490,414 (22,579 ) 490,414 Total 298 $ (4,053 ) $ 390,929 865 $ (43,780 ) $ 1,349,063 $ (47,835 ) $ 1,739,992

Loans Loans (Tables)

Loans Loans (Tables)	6 Months Ended
	Jun. 30, 2019
Receivables [Abstract]
Loan composition	The period end loan composition was as follows: June 30, 2019 December 31, 2018 ($ in Thousands) Commercial and industrial $ 7,579,384 $ 7,398,044 Commercial real estate — owner occupied 942,811 920,443 Commercial and business lending 8,522,194 8,318,487 Commercial real estate — investor 3,779,201 3,751,554 Real estate construction 1,394,815 1,335,031 Commercial real estate lending 5,174,016 5,086,585 Total commercial 13,696,210 13,405,072 Residential mortgage 8,277,479 8,277,712 Home equity 916,213 894,473 Other consumer 360,065 363,171 Total consumer 9,553,757 9,535,357 Total loans (a) $ 23,249,967 $ 22,940,429
Commercial and consumer loans by credit quality indicator	The following table presents commercial and consumer loans by credit quality indicator at June 30, 2019 : Pass Special Mention Potential Problem Nonaccrual Total ($ in Thousands) Commercial and industrial $ 7,387,549 $ 49,026 $ 58,658 $ 84,151 $ 7,579,384 Commercial real estate - owner occupied 909,641 8,362 24,237 571 942,811 Commercial and business lending 8,297,189 57,388 82,895 84,722 8,522,194 Commercial real estate - investor 3,628,197 71,753 77,766 1,485 3,779,201 Real estate construction 1,382,502 8,720 3,166 427 1,394,815 Commercial real estate lending 5,010,699 80,473 80,932 1,912 5,174,016 Total commercial 13,307,888 137,860 163,828 86,634 13,696,210 Residential mortgage 8,206,689 641 1,983 68,166 8,277,479 Home equity 903,694 652 32 11,835 916,213 Other consumer 359,487 506 — 72 360,065 Total consumer 9,469,870 1,799 2,014 80,073 9,553,757 Total loans $ 22,777,758 $ 139,660 $ 165,842 $ 166,707 $ 23,249,967 The following table presents commercial and consumer loans by credit quality indicator at December 31, 2018 : Pass Special Mention Potential Problem Nonaccrual Total ($ in Thousands) Commercial and industrial $ 7,162,370 $ 78,075 $ 116,578 $ 41,021 $ 7,398,044 Commercial real estate - owner occupied 854,265 6,257 55,964 3,957 920,443 Commercial and business lending 8,016,635 84,332 172,542 44,978 8,318,487 Commercial real estate - investor 3,653,642 28,479 67,481 1,952 3,751,554 Real estate construction 1,321,447 8,771 3,834 979 1,335,031 Commercial real estate lending 4,975,089 37,249 71,315 2,931 5,086,585 Total commercial 12,991,724 121,582 243,856 47,909 13,405,072 Residential mortgage 8,203,729 434 5,975 67,574 8,277,712 Home equity 880,808 1,223 103 12,339 894,473 Other consumer 362,343 749 — 79 363,171 Total consumer 9,446,881 2,406 6,078 79,992 9,535,357 Total loans $ 22,438,605 $ 123,988 $ 249,935 $ 127,901 $ 22,940,429
Summarized details of Loans	The following table presents loans by past due status at June 30, 2019 : Accruing Current 30-59 Days Past Due 60-89 Days Past Due 90 Days or More Past Due Nonaccrual (a) Total ($ in Thousands) Commercial and industrial $ 7,490,030 $ 4,769 $ 139 $ 293 $ 84,151 $ 7,579,384 Commercial real estate - owner occupied 940,222 2,018 — — 571 942,811 Commercial and business lending 8,430,252 6,787 139 293 84,722 8,522,194 Commercial real estate - investor 3,776,334 1,382 — — 1,485 3,779,201 Real estate construction 1,394,237 131 19 — 427 1,394,815 Commercial real estate lending 5,170,572 1,513 19 — 1,912 5,174,016 Total commercial 13,600,824 8,300 159 293 86,634 13,696,210 Residential mortgage 8,199,557 9,199 558 — 68,166 8,277,479 Home equity 898,550 5,176 652 — 11,835 916,213 Other consumer 356,360 1,150 688 1,795 72 360,065 Total consumer 9,454,467 15,524 1,898 1,795 80,073 9,553,757 Total loans $ 23,055,291 $ 23,824 $ 2,057 $ 2,088 $ 166,707 $ 23,249,967 (a) Of the total nonaccrual loans, $90 million , or 54% , were current with respect to payment at June 30, 2019 . The following table presents loans by past due status at December 31, 2018 : Accruing Current 30-59 Days Past Due 60-89 Days Past Due 90 Days or More Past Due Nonaccrual (a) Total ($ in Thousands) Commercial and industrial $ 7,356,187 $ 187 $ 338 $ 311 $ 41,021 $ 7,398,044 Commercial real estate - owner occupied 913,787 2,580 119 — 3,957 920,443 Commercial and business lending 8,269,974 2,767 457 311 44,978 8,318,487 Commercial real estate - investor 3,745,835 2,954 813 — 1,952 3,751,554 Real estate construction 1,333,722 330 — — 979 1,335,031 Commercial real estate lending 5,079,557 3,284 813 — 2,931 5,086,585 Total commercial 13,349,531 6,051 1,270 311 47,909 13,405,072 Residential mortgage 8,200,432 9,272 434 — 67,574 8,277,712 Home equity 876,085 4,826 1,223 — 12,339 894,473 Other consumer 358,970 1,401 868 1,853 79 363,171 Total consumer 9,435,487 15,499 2,525 1,853 79,992 9,535,357 Total loans $ 22,785,019 $ 21,550 $ 3,795 $ 2,165 $ 127,901 $ 22,940,429 (a) Of the total nonaccrual loans, $74 million , or 58% , were current with respect to payment at December 31, 2018 .
Summarized details of impaired Loans	The following table presents impaired loans individually evaluated under ASC Topic 310, excluding $2 million of purchased credit-impaired loans, at June 30, 2019 : Recorded Unpaid Related Average Interest ($ in Thousands) Loans with a related allowance Commercial and industrial $ 83,561 $ 94,759 $ 22,890 $ 48,118 $ 1,104 Commercial real estate — owner occupied 1,970 1,977 27 2,017 51 Commercial and business lending 85,531 96,735 22,917 50,135 1,155 Commercial real estate — investor 776 782 103 786 17 Real estate construction 417 497 56 422 14 Commercial real estate lending 1,193 1,279 159 1,208 31 Total commercial 86,724 98,015 23,076 51,343 1,186 Residential mortgage 45,856 49,110 5,693 45,953 991 Home equity 9,609 10,600 3,233 11,042 240 Other consumer 1,225 1,227 185 1,227 — Total consumer 56,690 60,938 9,112 58,222 1,231 Total loans with a related allowance $ 143,414 $ 158,952 $ 32,188 $ 109,565 $ 2,417 Loans with no related allowance Commercial and industrial $ 16,505 $ 33,999 $ — $ 23,303 $ 25 Commercial real estate — owner occupied 503 735 — 569 3 Commercial and business lending 17,007 34,734 — 23,872 28 Commercial real estate — investor 635 1,805 — 638 — Real estate construction — — — — — Commercial real estate lending 635 1,805 — 638 — Total commercial 17,642 36,539 — 24,511 28 Residential mortgage 10,416 10,584 — 8,183 178 Home equity 1,017 1,036 — — 11 Other consumer — — — — — Total consumer 11,432 11,620 — 8,183 189 Total loans with no related allowance $ 29,075 $ 48,159 $ — $ 32,694 $ 216 Total Commercial and industrial $ 100,066 $ 128,758 $ 22,890 $ 71,421 $ 1,129 Commercial real estate — owner occupied 2,473 2,712 27 2,586 54 Commercial and business lending 102,538 131,470 22,917 74,007 1,183 Commercial real estate — investor 1,411 2,587 103 1,424 17 Real estate construction 417 497 56 422 14 Commercial real estate lending 1,828 3,084 159 1,847 31 Total commercial 104,367 134,554 23,076 75,853 1,214 Residential mortgage 56,272 59,694 5,693 54,136 1,168 Home equity 10,626 11,636 3,233 11,042 251 Other consumer 1,225 1,227 185 1,227 — Total consumer 68,122 72,557 9,112 66,405 1,420 Total loans (a) $ 172,489 $ 207,111 $ 32,188 $ 142,258 $ 2,633 (a) The net recorded investment (defined as recorded investment, net of the related allowance) of the impaired loans represented 68% of the unpaid principal balance at June 30, 2019 . The following table presents impaired loans individually evaluated under ASC Topic 310, excluding $5 million of purchased credit-impaired loans, at December 31, 2018 : Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized ($ in Thousands) Loans with a related allowance Commercial and industrial $ 40,747 $ 42,131 $ 5,721 $ 52,461 $ 1,167 Commercial real estate — owner occupied 2,080 2,087 24 2,179 104 Commercial and business lending 42,827 44,218 5,745 54,640 1,271 Commercial real estate — investor 799 805 28 827 38 Real estate construction 510 589 75 533 32 Commercial real estate lending 1,309 1,394 103 1,360 70 Total commercial 44,136 45,612 5,848 56,000 1,341 Residential mortgage 41,691 45,149 6,023 42,687 1,789 Home equity 9,601 10,539 3,312 10,209 566 Other consumer 1,181 1,183 121 1,184 3 Total consumer 52,473 56,871 9,456 54,080 2,358 Total loans with a related allowance $ 96,609 $ 102,483 $ 15,304 $ 110,079 $ 3,699 Loans with no related allowance Commercial and industrial $ 22,406 $ 45,024 $ — $ 21,352 $ (344 ) Commercial real estate — owner occupied 3,772 4,823 — 3,975 — Commercial and business lending 26,178 49,847 — 25,327 (344 ) Commercial real estate — investor 1,585 2,820 — 980 68 Real estate construction — — — — — Commercial real estate lending 1,585 2,820 — 980 68 Total commercial 27,763 52,667 — 26,307 (276 ) Residential mortgage 8,795 9,074 — 8,790 203 Home equity 523 542 — 530 — Other consumer — — — — — Total consumer 9,318 9,616 — 9,320 203 Total loans with no related allowance $ 37,081 $ 62,283 $ — $ 35,627 $ (73 ) Total Commercial and industrial $ 63,153 $ 87,155 $ 5,721 $ 73,813 $ 823 Commercial real estate — owner occupied 5,852 6,910 24 6,154 104 Commercial and business lending 69,005 94,065 5,745 79,967 927 Commercial real estate — investor 2,384 3,625 28 1,807 106 Real estate construction 510 589 75 533 32 Commercial real estate lending 2,894 4,214 103 2,340 138 Total commercial 71,899 98,279 5,848 82,307 1,065 Residential mortgage 50,486 54,223 6,023 51,477 1,992 Home equity 10,124 11,081 3,312 10,739 566 Other consumer 1,181 1,183 121 1,184 3 Total consumer 61,791 66,487 9,456 63,400 2,561 Total loans (a) $ 133,690 $ 164,766 $ 15,304 $ 145,707 $ 3,626 (a) The net recorded investment (defined as recorded investment, net of the related allowance) of the impaired loans represented 72% of the unpaid principal balance at December 31, 2018 .
Nonaccrual and performing restructured loans	The following table presents nonaccrual and performing restructured loans by loan portfolio: June 30, 2019 December 31, 2018 Performing Restructured Loans Nonaccrual Restructured Loans (a) Performing Restructured Loans Nonaccrual Restructured Loans (a) ($ in Thousands) Commercial and industrial $ 16,850 $ 101 $ 25,478 $ 249 Commercial real estate — owner occupied 1,970 — 2,080 — Commercial real estate — investor 315 461 799 933 Real estate construction 232 185 311 198 Residential mortgage 17,645 21,213 16,036 22,279 Home equity 7,247 2,369 7,385 2,627 Other consumer 1,222 3 1,174 6 Total restructured loans $ 45,481 $ 24,332 $ 53,263 $ 26,292
Summary of restructured loans	Six Months Ended June 30, 2019 Six Months Ended June 30, 2018 Number of Loans Recorded Investment (a) Unpaid Principal Balance (b) Number of Loans Recorded Investment (a) Unpaid Principal Balance (b) ($ in Thousands) Commercial and industrial 1 $ 196 $ 196 1 $ 47 $ 47 Commercial real estate — investor — — — 1 984 1,031 Residential mortgage 38 5,665 5,682 10 2,064 2,064 Home equity 18 499 506 10 935 949 Other consumer 1 10 10 1 5 8 Total loans modified 58 $ 6,370 $ 6,394 23 $ 4,035 $ 4,099 (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 troubled debt restructuring during the previous twelve months which subsequently defaulted during the six months ended June 30, 2019 and 2018 and the recorded investment in these restructured loans as of June 30, 2019 and 2018 : Six Months Ended June 30, 2019 Six Months Ended June 30, 2018 Number of Loans Recorded Investment Number of Loans Recorded Investment ($ in Thousands) Commercial and industrial — $ — 3 $ — Residential mortgage 16 2,813 8 2,219 Home equity 14 477 21 1,409 Total loans modified 30 $ 3,290 32 $ 3,628
Changes in the allowance for loan losses by portfolio segment	The allowance related to the oil and gas portfolio was $25 million , or 3.8% of total oil and gas loans, and $12 million , or 1.6% of total oil and gas loans, at June 30, 2019 and December 31, 2018 , respectively. ($ in Millions) Six Months Ended June 30, 2019 Year Ended December 31, 2018 Balance at beginning of period $ 12 $ 27 Charge offs (17 ) (24 ) Recoveries 4 6 Net Charge offs (13 ) (17 ) Provision for loan losses 26 2 Balance at end of period $ 25 $ 12 Allowance for loan losses Individually evaluated for impairment $ 16 $ — Collectively evaluated for impairment 9 12 Total allowance for loan losses $ 25 $ 12 Loans Individually evaluated for impairment $ 63 $ 22 Collectively evaluated for impairment 594 725 Total loans $ 657 $ 747 The following table presents a summary of the changes in the allowance for loan losses by portfolio segment for the six months ended June 30, 2019 : ($ in Thousands) Commercial and Commercial real estate - owner occupied Commercial real estate - Real estate Residential Home Other Total December 31, 2018 $ 108,835 $ 9,255 $ 40,844 $ 28,240 $ 25,595 $ 19,266 $ 5,988 $ 238,023 Charge offs (26,255 ) (222 ) — (60 ) (1,260 ) (725 ) (2,726 ) (31,247 ) Recoveries 6,650 1,312 34 211 438 1,273 467 10,384 Net Charge offs (19,605 ) 1,089 34 151 (822 ) 548 (2,259 ) (20,864 ) Provision for loan losses 23,970 (1,110 ) 10 (1,267 ) (3,421 ) (4,241 ) 2,558 16,500 June 30, 2019 $ 113,199 $ 9,235 $ 40,888 $ 27,124 $ 21,352 $ 15,573 $ 6,287 $ 233,659 Allowance for loan losses Individually evaluated for impairment $ 22,890 $ 27 $ 103 $ 56 $ 5,693 $ 3,233 $ 185 $ 32,188 Collectively evaluated for impairment 90,309 9,207 40,785 27,068 15,659 12,340 6,102 201,470 Total allowance for loan losses $ 113,199 $ 9,235 $ 40,888 $ 27,124 $ 21,352 $ 15,573 $ 6,287 $ 233,659 Loans Individually evaluated for impairment $ 100,066 $ 2,473 $ 1,411 $ 417 $ 56,272 $ 10,626 $ 1,225 $ 172,489 Collectively evaluated for impairment 7,478,790 939,647 3,777,511 1,394,384 8,220,602 905,560 358,841 23,075,334 Acquired and accounted for under ASC 310-30 (a) 528 691 279 14 605 27 — 2,145 Total loans $ 7,579,384 $ 942,811 $ 3,779,201 $ 1,394,815 $ 8,277,479 $ 916,213 $ 360,065 $ 23,249,967 (a) Loans acquired in business combinations and accounted for under ASC Subtopic 310-30 "Receivables — Loans and Debt Securities Acquired with Deteriorated Credit Quality." For comparison purposes, a summary of the changes in the allowance for loan losses by portfolio segment for the year ended December 31, 2018 , was as follows: ($ in Thousands) Commercial and Commercial real estate Commercial real estate - Real estate Residential Home Other Total December 31, 2017 $ 123,068 $ 10,352 $ 41,059 $ 34,370 $ 29,607 $ 22,126 $ 5,298 $ 265,880 Charge offs (30,837 ) (1,363 ) (7,914 ) (298 ) (1,627 ) (3,236 ) (5,261 ) (50,536 ) Recoveries 13,714 639 668 446 1,271 2,628 812 20,179 Net Charge offs (17,123 ) (724 ) (7,246 ) 149 (355 ) (608 ) (4,448 ) (30,358 ) Provision for loan losses 2,890 (373 ) 7,031 (6,279 ) (3,657 ) (2,252 ) 5,138 2,500 December 31, 2018 $ 108,835 $ 9,255 $ 40,844 $ 28,240 $ 25,595 $ 19,266 $ 5,988 $ 238,023 Allowance for loan losses Individually evaluated for impairment $ 5,721 $ 24 $ 28 $ 75 $ 6,023 $ 3,312 $ 121 $ 15,304 Collectively evaluated for impairment 103,114 9,231 40,816 28,165 19,572 15,954 5,867 222,719 Total allowance for loan losses $ 108,835 $ 9,255 $ 40,844 $ 28,240 $ 25,595 $ 19,266 $ 5,988 $ 238,023 Loans Individually evaluated for impairment $ 63,153 $ 5,852 $ 2,384 $ 510 $ 50,486 $ 10,124 $ 1,181 $ 133,690 Collectively evaluated for impairment 7,331,898 913,708 3,748,883 1,334,500 8,226,642 884,266 361,990 22,801,887 Acquired and accounted for under ASC 310-30 (a) 2,994 883 287 21 584 83 — 4,853 Total loans $ 7,398,044 $ 920,443 $ 3,751,554 $ 1,335,031 $ 8,277,712 $ 894,473 $ 363,171 $ 22,940,429 (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: Six Months Ended June 30, 2019 Year Ended December 31, 2018 ($ in Thousands) Allowance for Unfunded Commitments Balance at beginning of period $ 24,336 $ 24,400 Provision for unfunded commitments (2,500 ) (2,500 ) Amount recorded at acquisition 70 2,436 Balance at end of period $ 21,907 $ 24,336
Changes In accretable yield for purchased credit impaired	Changes in the accretable yield for loans acquired and accounted for under ASC Topic 310-30 were as follows for the six months ended June 30, 2019 and for the year ended December 31, 2018 : Six Months Ended June 30, 2019 Year Ended December 31, 2018 ($ in Thousands) Changes in Accretable Yield Balance at beginning of period $ 1,482 $ — Purchases — 4,853 Accretion (812 ) (4,954 ) Net reclassification from non-accretable yield 23 1,605 Other (a) — (22 ) Balance at end of period $ 694 $ 1,482 (a) Primarily includes charge-offs which are accounted for under ASC Subtopic 310-30 "Receivables — Loans and Debt Securities Acquired with Deteriorated Credit Quality."

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of core deposit intangibles and other intangibles	For CDI and other intangibles, changes in the gross carrying amount, accumulated amortization, and net book value were as follows: Six Months Ended June 30, 2019 Year Ended December 31, 2018 ($ in Thousands) Core deposit intangibles Gross carrying amount $ 80,730 $ 58,100 Accumulated amortization (8,419 ) (5,326 ) Net book value $ 72,310 $ 52,774 Additions during the period $ 22,630 $ 58,100 Amortization during the year $ 3,094 $ 5,326 Other intangibles Gross carrying amount $ 44,887 $ 44,931 Reductions due to sale — (43 ) Accumulated amortization (23,282 ) (21,825 ) Net book value $ 21,605 $ 23,062 Additions during the period $ — $ 10,359 Amortization during the year $ 1,457 $ 2,833
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 mortgage servicing rights asset and the mortgage servicing rights valuation allowance is as follows: Six Months Ended June 30, 2019 Year Ended December 31, 2018 ($ in Thousands) Mortgage servicing rights Mortgage servicing rights at beginning of period $ 68,433 $ 59,168 Additions from acquisition — 8,136 Additions 3,575 10,722 Amortization (5,448 ) (9,594 ) Mortgage servicing rights at end of period $ 66,560 $ 68,433 Valuation allowance at beginning of period (239 ) (784 ) (Additions) recoveries, net (146 ) 545 Valuation allowance at end of period (385 ) (239 ) Mortgage servicing rights, net $ 66,175 $ 68,193 Fair value of mortgage servicing rights $ 69,839 $ 81,012 Portfolio of residential mortgage loans serviced for others (“servicing portfolio”) $ 8,503,844 $ 8,600,983 Mortgage servicing rights, net to servicing portfolio 0.78 % 0.79 % Mortgage servicing rights expense (a) $ 5,593 $ 9,049
Summary of estimated future amortization expense	The projections of amortization expense are based on existing asset balances, the current interest rate environment, and prepayment speeds as of June 30, 2019 . 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: Estimated Amortization Expense Core Deposit Intangibles Other Intangibles Mortgage Servicing Rights ($ in Thousands) Six Months Ending December 31, 2019 $ 4,036 $ 1,367 $ 5,157 2020 8,073 2,707 11,191 2021 8,073 2,682 9,387 2022 8,073 2,659 7,835 2023 8,073 2,640 6,529 2024 8,073 2,620 5,443 Beyond 2024 27,909 6,931 21,018 Total Estimated Amortization Expense $ 72,310 $ 21,605 $ 66,560

Short and Long-Term Funding (Ta

Short and Long-Term Funding (Tables)	6 Months Ended
	Jun. 30, 2019
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): June 30, 2019 December 31, 2018 ($ in Thousands) Short-Term Funding Federal funds purchased $ 7,010 $ 19,710 Securities sold under agreements to repurchase 76,185 91,941 Federal funds purchased and securities sold under agreements to repurchase 83,195 111,651 Commercial paper 28,787 45,423 Total short-term funding $ 111,983 $ 157,074 Long-Term Funding Corporation senior notes, at par, due 2019 $ 250,000 $ 250,000 Bank senior notes, at par, due 2021 300,000 300,000 Corporation subordinated notes, at par, due 2025 250,000 250,000 Other long-term funding and capitalized costs (3,597 ) (4,389 ) Total long-term funding 796,403 795,611 Total short and long-term funding, excluding FHLB advances $ 908,386 $ 952,685 FHLB Advances Short-term FHLB advances $ 80,000 $ 900,000 Long-term FHLB advances 2,662,941 2,674,371 Total FHLB advances $ 2,742,941 $ 3,574,371 Total short and long-term funding $ 3,651,327 $ 4,527,056
Remaining contractual maturity of securities sold under agreements to repurchase	The remaining contractual maturity of the securities sold under agreements to repurchase in the consolidated balance sheets as of June 30, 2019 and December 31, 2018 are presented in the following table: Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to 30 days 30-90 days Greater than 90 days Total ($ in Thousands) June 30, 2019 Repurchase agreements Agency mortgage-related securities $ 76,185 $ — $ — $ — $ 76,185 Total $ 76,185 $ — $ — $ — $ 76,185 December 31, 2018 Repurchase agreements Agency mortgage-related securities $ 91,941 $ — $ — $ — $ 91,941 Total $ 91,941 $ — $ — $ — $ 91,941
FHLB Maturity	The original contractual maturity or next put date of the Corporation's FHLB advances as of June 30, 2019 and December 31, 2018 are presented in the following table: June 30, 2019 December 31, 2018 Amount Weighted Average Contractual Coupon Rate Amount Weighted Average Contractual Coupon Rate ($ in Thousands) Maturity or put date 1 year or less $ 2,441,050 2.27 % $ 2,262,584 2.06 % After 1 but within 2 288,248 2.57 % 1,285,039 2.39 % After 2 but within 3 4,811 5.21 % 14,393 2.98 % After 3 years 8,833 3.36 % 12,354 4.55 % FHLB advances and overall rate $ 2,742,941 2.31 % $ 3,574,371 2.19 %

Derivative and Hedging Activi_2

Derivative and Hedging Activities (Tables)	6 Months Ended
	Jun. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary Of Other derivative instruments not designated as hedging instruments	The table below identifies the consolidated balance sheets category and fair values of the Corporation’s derivative instruments: June 30, 2019 December 31, 2018 ($ in Thousands) Notional Amount Fair Consolidated Notional Amount Fair Consolidated Derivatives not designated as hedging instruments Interest rate-related instruments — customer and mirror $ 2,761,552 $ 77,264 Other assets $ 2,707,204 $ 52,796 Other assets Interest rate-related instruments — customer and mirror 2,761,552 (15,013 ) Other liabilities 2,707,204 (52,653 ) Other liabilities Foreign currency exchange forwards 166,935 2,683 Other assets 117,879 721 Other assets Foreign currency exchange forwards 159,340 (2,425 ) Other liabilities 69,153 (675 ) Other liabilities Commodity contracts 258,928 22,498 Other assets 331,727 35,426 Other assets Commodity contracts 258,485 (22,076 ) Other liabilities 315,861 (34,340 ) Other liabilities Interest rate lock commitments (mortgage) 396,130 4,869 Other assets 191,222 2,208 Other assets Forward commitments (mortgage) 333,060 (1,903 ) Other liabilities 139,984 (2,072 ) Other liabilities Purchased options (time deposit) 4,814 126 Other assets 11,185 109 Other assets Written options (time deposit) 4,814 (126 ) Other liabilities 11,185 (109 ) Other liabilities Derivatives designated as hedging instruments Interest Rate Products 500,000 69 Other assets 500,000 (40 ) Other liabilities
Cumulative basis adjustment for fair value hedges	The following table presents amounts that were recorded on the consolidated balance sheets related to cumulative basis adjustment for fair value hedges: Line Item in the Statement of Financial Position in Which the Hedged Item is Included Carrying Amount of the Hedged Assets/(Liabilities) Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities) ($ in Thousands) June 30, 2019 Loans and investment securities receivables (a) $ 505,659 $ 5,659 Total $ 505,659 $ 5,659 (a) These amounts include the amortized cost basis of closed portfolios used to designated hedging relationships in which the hedged item is the last layer expected to be remaining at the end of the hedging relationship. At June 30, 2019 , the amortized cost basis of the closed portfolios used in these hedging relationships was $994 million ; the positive cumulative basis adjustments associated with these hedging relationships was $6 million; and the amounts of the designated hedged items were $500 million .
Schedule of cash flow hedging instruments, statements of financial performance and financial position location	The table below identifies the effect of fair value hedge accounting on the Corporation's consolidated statements of income for the three and six months ended June 30, 2019 and 2018 : Location and Amount of Gain or (Loss) Recognized in Income on Fair Value and Cash Flow Hedging Relationships Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 ($ in Thousands) Interest Income Other Income (Expense) Interest Income Other Income (Expense) Interest Income Other Income (Expense) Interest Income Other Income (Expense) Total amounts of income and expense line items presented in the consolidated statements of income in which the effects of the fair value hedge is recorded $ 53 $ — $ 5 $ — $ 219 $ — $ (13 ) $ — The effects of fair value hedging: Gain or (loss) on fair value hedging relationships in Subtopic 815-20 Interest contracts Hedged items 4,165 — (2,133 ) — 6,222 — (2,409 ) — Derivatives designated as hedging instruments (a) (4,112 ) — 2,138 — (6,003 ) — 2,396 —
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 and six months ended June 30, 2019 and 2018 : Consolidated Statements of Income Category of Gain / (Loss) Recognized in Income Three Months Ended June 30, Six Months Ended June 30, ($ in Thousands) 2019 2018 2019 2018 Derivative Instruments Interest rate-related instruments — customer and mirror, net Capital markets, net $ (1,018 ) $ (384 ) $ (1,690 ) $ 108 Foreign currency exchange forwards Capital markets, net 186 98 212 70 Commodity contracts Capital markets, net (97 ) (1,050 ) (664 ) (886 ) Interest rate lock commitments (mortgage) Mortgage banking, net 1,837 255 2,661 1,749 Forward commitments (mortgage) Mortgage banking, net (78 ) (616 ) 169 (606 )

Balance Sheet Offsetting (Table

Balance Sheet Offsetting (Tables)	6 Months Ended
	Jun. 30, 2019
Offsetting [Abstract]
Balance sheet offsetting of derivative assets and liabilities	The following table presents the 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 of recognized assets Gross amounts not offset in the consolidated balance sheets ($ in Thousands) Gross amounts offset in the consolidated balance sheets Net amounts presented in the consolidated balance sheets Derivative liability available for offset Collateral received Net amount Derivative assets (a) June 30, 2019 $ 17,504 $ — $ 17,504 $ (6,693 ) $ (8,339 ) $ 2,472 December 31, 2018 65,596 — 65,596 (22,873 ) (41,879 ) 843 Gross amounts of recognized liabilities Gross amounts not offset ($ in Thousands) Gross amounts Net amounts Derivative asset available for offset Collateral pledged Net amount Derivative liabilities (a) June 30, 2019 $ 17,045 $ — $ 17,045 $ (6,693 ) $ (10,179 ) $ 174 December 31, 2018 22,951 — 22,951 (22,873 ) (63 ) 16

Commitments, Off-Balance Shee_2

Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters (Tables)	6 Months Ended
	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Summary of lending-related and other commitments	The following is a summary of lending-related commitments: June 30, 2019 December 31, 2018 ($ in Thousands) Commitments to extend credit, excluding commitments to originate residential mortgage loans held for sale (a)(b) $ 8,902,027 $ 8,720,293 Commercial letters of credit (a) 6,951 7,599 Standby letters of credit (c) 264,541 255,904 (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 is not material at June 30, 2019 or December 31, 2018 . (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 and $2 million at June 30, 2019 and December 31, 2018 , respectively, as an estimate of the fair value of these financial instruments.
Summary of changes in the residential mortgage repurchase reserve	The following summarizes the changes in the mortgage repurchase reserve for the six months ended June 30, 2019 and for the year ended December 31, 2018 : Six Months Ended June 30, 2019 Year Ended December 31, 2018 ($ in Thousands) Balance at beginning of period $ 752 $ 987 Repurchase provision expense 128 345 Adjustments to provision expense — (450 ) Repurchase/reimbursement charges taken (174 ) (218 ) Amount recorded at acquisition — 88 Balance at end of period $ 706 $ 752

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2019
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 June 30, 2019 and December 31, 2018 , aggregated by the level in the fair value hierarchy within which those measurements fall: Fair Value Hierarchy June 30, 2019 December 31, 2018 ($ in Thousands) Assets Investment securities available for sale U.S. Treasury securities Level 1 $ — $ 999 Residential mortgage-related securities FNMA / FHLMC Level 2 183,722 295,252 GNMA Level 2 1,331,633 2,128,531 Private-label Level 2 814 1,003 Commercial mortgage-related securities FNMA / FHLMC Level 2 21,102 — GNMA Level 2 1,470,048 1,220,797 FFELP asset backed securities Level 2 273,137 297,360 Other debt securities Level 2 3,000 3,000 Total investment securities available for sale Level 1 — 999 Total investment securities available for sale Level 2 3,283,456 3,945,943 Equity securities with readily determinable fair values Level 1 1,621 1,568 Residential loans held for sale Level 2 129,303 64,321 Interest rate-related instruments Level 2 77,264 52,796 Foreign currency exchange forwards Level 2 2,683 721 Commodity contracts Level 2 22,498 35,426 Purchased options (time deposit) Level 2 126 109 Interest rate products (designated as hedging instruments) Level 2 69 — Interest rate lock commitments to originate residential mortgage loans held for sale Level 3 4,869 2,208 Liabilities Interest rate-related instruments Level 2 $ 15,013 $ 52,653 Foreign currency exchange forwards Level 2 2,425 675 Commodity contracts Level 2 22,076 34,340 Written options (time deposit) Level 2 126 109 Interest rate products (designated as hedging instruments) Level 2 — 40 Forward commitments to sell residential mortgage loans Level 3 1,903 2,072
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 six months ended June 30, 2019 and the year ended December 31, 2018 , for financial instruments measured on a recurring basis and classified within Level 3 of the fair value hierarchy: Derivative Financial Instruments ($ in Thousands) Balance December 31, 2017 $ 1,225 Total net gains (losses) included in income Mortgage derivative gain (loss) (1,085 ) Balance December 31, 2018 $ 140 Total net gains (losses) included in income Mortgage derivative gain (loss) 2,830 Balance June 30, 2019 $ 2,969
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 June 30, 2019 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 June 30, 2019 : ($ in Thousands) Equity securities without readily determinable fair values Carrying value as of December 31, 2018 $ — Upward carrying value changes 13,444 Carrying value as of June 30, 2019 $ 13,444 Cumulative upward carrying value changes between January 1, 2018 and June 30, 2019 $ 13,444 Cumulative downward carrying value changes/impairment between January 1, 2018 and June 30, 2019 $ —
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 Category of Adjustment Recognized in Income Adjustment Recognized in the Consolidated Statements of Income ($ in Thousands) Fair Value Hierarchy Fair Value June 30, 2019 Assets Impaired loans (a) Level 3 $ 74,931 Provision for credit losses (b) $ (42,735 ) Other real estate owned (c) Level 2 519 Foreclosure / OREO expense, net (1,115 ) Mortgage servicing rights Level 3 69,839 Mortgage banking, net (146 ) Equity securities Level 3 13,444 Investment securities gains (losses), net 13,444 December 31, 2018 Assets Impaired loans (a) Level 3 $ 26,191 Provision for credit losses (b) $ (14,521 ) Other real estate owned (c) Level 2 2,200 Foreclosure / OREO expense, net (1,545 ) Mortgage servicing rights Level 3 81,012 Mortgage banking, net 545 (a) Represents individually evaluated impaired loans, net of the related allowance for loan losses. (b) Represents provision for credit losses on individually evaluated impaired loans. (c) 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.
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: Valuation Technique Significant Unobservable Input Weighted Average Input Applied June 30, 2019 Mortgage servicing rights Discounted cash flow Discount rate 11% Mortgage servicing rights Discounted cash flow Constant prepayment rate 12% Impaired Loans Appraisals / Discounted cash flow Collateral / Discount factor 34%
Estimated fair values of financial instruments	Fair value estimates are set forth below for the Corporation’s financial instruments: June 30, 2019 December 31, 2018 Fair Value Hierarchy Level Carrying Amount Fair Value Carrying Amount Fair Value ($ in Thousands) Financial assets Cash and due from banks Level 1 $ 382,985 $ 382,985 $ 507,187 $ 507,187 Interest-bearing deposits in other financial institutions Level 1 172,708 172,708 221,226 221,226 Federal funds sold and securities purchased under agreements to resell Level 1 1,385 1,385 148,285 148,285 Investment securities held to maturity Level 1 999 1,019 — — Investment securities held to maturity Level 2 2,805,066 2,873,739 2,740,511 2,710,271 Investment securities available for sale Level 1 — — 999 999 Investment securities available for sale Level 2 3,283,456 3,283,456 3,945,943 3,945,943 Equity securities with readily determinable fair values Level 1 1,621 1,621 1,568 1,568 Equity securities without readily determinable fair values Level 3 13,444 13,444 — — FHLB and Federal Reserve Bank stocks Level 2 202,758 202,758 250,534 250,534 Residential loans held for sale Level 2 129,303 129,303 64,321 64,321 Commercial loans held for sale Level 2 11,000 11,000 14,943 14,943 Loans, net Level 3 23,016,308 22,767,412 22,702,406 22,317,395 Bank and corporate owned life insurance Level 2 668,638 668,638 663,203 663,203 Derivatives (other assets) Level 2 102,641 102,641 89,052 89,052 Interest rate lock commitments to originate residential mortgage loans held for sale Level 3 4,869 4,869 2,208 2,208 Financial liabilities Noninterest-bearing demand, savings, interest-bearing demand, and money market accounts Level 3 $ 21,906,970 $ 21,906,970 $ 22,081,992 $ 22,081,992 Brokered CDs and other time deposits (a) Level 2 3,367,252 3,373,332 2,815,401 2,815,401 Short-term funding (b) Level 2 111,983 111,983 157,074 157,074 Long-term funding Level 2 796,403 840,323 795,611 826,612 FHLB advances Level 2 2,742,941 2,781,103 3,574,371 3,565,572 Standby letters of credit (c) Level 2 2,693 2,693 2,482 2,482 Derivatives (other liabilities) Level 2 39,641 39,641 87,817 87,817 Forward commitments to sell residential mortgage loans Level 3 1,903 1,903 2,072 2,072 (a) When the estimated fair value is less than the carrying value, the carrying value is reported as the fair value. (b) The carrying amount is a reasonable estimate of fair value for existing short-term funding. (c) The commitment on standby letters of credit was $265 million at June 30, 2019 and $256 million at December 31, 2018 . 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)	6 Months Ended
	Jun. 30, 2019
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, Bank Mutual Pension Plan, and Postretirement Plan for the three and six months ended June 30, 2019 and 2018 were as follows: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 ($ in Thousands) Components of Net Periodic Benefit Cost RAP Service cost $ 1,925 $ 1,893 $ 3,850 $ 3,785 Interest cost 2,413 1,660 4,825 3,320 Expected return on plan assets (6,075 ) (4,755 ) (12,150 ) (9,510 ) Amortization of prior service cost (19 ) (19 ) (38 ) (38 ) Amortization of actuarial loss 65 463 130 925 Total net periodic pension cost $ (1,691 ) $ (759 ) $ (3,383 ) $ (1,518 ) Bank Mutual Pension Plan Interest cost N/A 650 N/A $ 1,083 Expected return on plan assets N/A (1,060 ) N/A (1,592 ) Total net periodic pension cost N/A $ (410 ) N/A $ (509 ) Postretirement Plan Interest cost $ 26 $ 27 $ 52 $ 53 Amortization of prior service cost (19 ) (19 ) (38 ) (38 ) Amortization of actuarial loss (1 ) 2 (2 ) 4 Total net periodic benefit cost $ 6 $ 10 $ 13 $ 19

Segment Reporting (Tables)

Segment Reporting (Tables)	6 Months Ended
	Jun. 30, 2019
Segment Reporting Information [Line Items]
Selected segment information	Information about the Corporation’s segments is presented below: Corporate and Commercial Specialty Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 ($ in Thousands) Net interest income $ 115,648 $ 121,985 $ 231,557 $ 226,420 Net intersegment interest income (expense) (20,061 ) (14,656 ) (42,683 ) (23,133 ) Segment net interest income 95,587 107,330 188,874 203,287 Noninterest income 14,318 14,194 25,763 26,876 Total revenue 109,904 121,524 214,637 230,163 Credit provision 13,317 11,126 26,802 21,723 Noninterest expense 40,022 41,775 78,810 81,025 Income (loss) before income taxes 56,566 68,623 109,026 127,415 Income tax expense (benefit) 10,864 13,454 20,866 24,880 Net income $ 45,702 $ 55,169 $ 88,159 $ 102,535 Allocated goodwill $ 525,798 $ 523,284 Community, Consumer, and Business Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 ($ in Thousands) Net interest income $ 84,874 $ 90,418 $ 172,946 $ 176,813 Net intersegment interest income (expense) 25,586 24,202 49,028 41,350 Segment net interest income 110,461 114,620 221,974 218,163 Noninterest income 78,335 76,250 152,559 150,286 Total revenue 188,796 190,870 374,533 368,449 Credit provision 4,966 4,880 10,000 9,846 Noninterest expense 138,415 138,553 269,405 265,700 Income (loss) before income taxes 45,415 47,437 95,128 92,904 Income tax expense (benefit) 9,540 9,962 19,983 19,510 Net income $ 35,874 $ 37,475 $ 75,145 $ 73,394 Allocated goodwill $ 650,221 $ 643,382 Information about the Corporation’s segments is presented below: (continued) Risk Management and Shared Services Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 ($ in Thousands) Net interest income $ 13,097 $ 13,959 $ 24,664 $ 33,000 Net intersegment interest income (expense) (5,525 ) (9,546 ) (6,345 ) (18,217 ) Segment net interest income 7,572 4,413 18,318 14,783 Noninterest income 3,185 2,399 8,718 6,059 Total revenue 10,757 6,812 27,036 20,842 Credit provision (10,283 ) (12,006 ) (22,801 ) (27,569 ) Noninterest expense (a) 19,343 30,929 41,236 77,498 Income (loss) before income taxes 1,697 (12,111 ) 8,602 (29,087 ) Income tax expense (benefit) (1,387 ) (8,661 ) 560 (11,806 ) Net income $ 3,084 $ (3,450 ) $ 8,042 $ (17,280 ) Allocated goodwill $ — $ — Consolidated Total Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 ($ in Thousands) Net interest income $ 213,619 $ 226,362 $ 429,167 $ 436,233 Net intersegment interest income (expense) — — — — Segment net interest income 213,619 226,362 429,167 436,233 Noninterest income 95,837 92,842 187,040 183,222 Total revenue 309,457 319,204 616,206 619,455 Credit provision 8,000 4,000 14,000 4,000 Noninterest expense 197,779 211,258 389,450 424,223 Income (loss) before income taxes 103,678 103,947 212,756 191,232 Income tax expense (benefit) 19,017 14,754 41,409 32,583 Net income $ 84,661 $ 89,192 $ 171,347 $ 158,648 Allocated goodwill $ 1,176,019 $ 1,166,665 (a) For the three months ended June 30, 2019 and 2018 , the Risk Management and Shared Services segment includes approximately $4 million and $7 million , respectively, of acquisition related noninterest expense. For the six months ended June 30, 2019 and 2018 , the Risk Management and Shared Services segment includes approximately $4 million and $28 million , respectively, of acquisition related noninterest expense.

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	6 Months Ended
	Jun. 30, 2019
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 June 30, 2019 and 2018 respectively, including changes during the preceding six and three month periods as well as any reclassifications out of accumulated other comprehensive income (loss): ($ in Thousands) Investment Securities Available For Sale Defined Benefit Pension and Post Retirement Obligations Accumulated Other Comprehensive Income (Loss) Balance January 1, 2019 $ (75,643 ) $ (49,330 ) $ (124,972 ) Other comprehensive income (loss) before reclassifications 89,966 — 89,966 Amounts reclassified from accumulated other comprehensive income (loss) Investment securities losses (gains), net (2,143 ) — (2,143 ) Personnel expense — (75 ) (75 ) Other expense — 128 128 Amortization of net unrealized (gains) losses on available for sale securities transferred to held to maturity securities 288 — 288 Income tax (expense) benefit (22,242 ) (13 ) (22,255 ) Net other comprehensive income (loss) during period 65,869 40 65,909 Balance June 30, 2019 $ (9,773 ) $ (49,290 ) $ (59,063 ) Balance January 1, 2018 $ (38,453 ) $ (24,305 ) $ (62,758 ) Other comprehensive income (loss) before reclassifications (60,754 ) — (60,754 ) Amounts reclassified from accumulated other comprehensive income (loss) Investment securities loss (gain), net 2,015 — 2,015 Personnel expense — (76 ) (76 ) Other expense — 929 929 Adjustment for adoption of ASU 2016-01 (84 ) — (84 ) Adjustment for adoption of ASU 2018-02 (8,419 ) (5,235 ) (13,654 ) Amortization of net unrealized (gains) losses on available for sale securities transferred to held to maturity securities (632 ) — (632 ) Income tax (expense) benefit 15,340 (216 ) 15,124 Net other comprehensive income (loss) during period (52,533 ) (4,597 ) (57,130 ) Balance June 30, 2018 $ (90,986 ) $ (28,902 ) $ (119,888 ) ($ in Thousands) Investments Defined Benefit Accumulated Balance April 1, 2019 $ (54,065 ) $ (49,310 ) $ (103,375 ) Other comprehensive income (loss) before reclassifications 59,476 — 59,476 Amounts reclassified from accumulated other comprehensive income (loss) Investment securities losses (gains), net (463 ) — (463 ) Personnel expense — (38 ) (38 ) Other expense — 64 64 Amortization of net unrealized (gains) losses on available for sale securities transferred to held to maturity securities 218 — 218 Income tax (expense) benefit (14,940 ) (7 ) (14,947 ) Net other comprehensive income (loss) during period 44,292 20 44,311 Balance June 30, 2019 $ (9,773 ) $ (49,290 ) $ (59,063 ) Balance April 1, 2018 $ (78,453 ) $ (29,220 ) $ (107,673 ) Other comprehensive income (loss) before reclassifications (18,919 ) — (18,919 ) Amounts reclassified from accumulated other comprehensive income (loss) Investment securities loss (gain), net 2,015 — 2,015 Personnel expense — (38 ) (38 ) Other expense — 465 465 Amortization of net unrealized (gains) losses on available for sale securities transferred to held to maturity securities (335 ) — (335 ) Income tax (expense) benefit 4,705 (109 ) 4,596 Net other comprehensive income (loss) during period (12,533 ) 318 (12,215 ) Balance June 30, 2018 $ (90,986 ) $ (28,902 ) $ (119,888 )

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	6 Months Ended
	Jun. 30, 2019
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 June 30, Six Months Ended June 30, 2019 2018 2019 2018 ($ in Thousands) Insurance commissions and fees $ — $ — $ — $ — Wealth management fees — — — — Service charges and deposit account fees 3,195 3,786 6,583 8,011 Card-based fees (a) 338 347 666 661 Other revenue (1,016 ) (813 ) (1,284 ) (157 ) Noninterest Income (in-scope of Topic 606) $ 2,517 $ 3,320 $ 5,964 $ 8,515 Noninterest Income (out-of-scope of Topic 606) 11,801 10,874 19,799 18,361 Total Noninterest Income $ 14,318 $ 14,194 $ 25,763 $ 26,876 Community, Consumer, and Business Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 ($ in Thousands) Insurance commissions and fees $ 22,982 $ 23,988 $ 48,442 $ 46,612 Wealth management fees 20,691 20,307 40,870 40,708 Service charges and deposit account fees 12,218 12,590 23,926 24,773 Card-based fees (a) 9,791 9,806 18,709 18,960 Other revenue 2,740 2,657 5,372 5,493 Noninterest Income (in-scope of Topic 606) $ 68,421 $ 69,349 $ 137,320 $ 136,547 Noninterest Income (out-of-scope of Topic 606) 9,914 6,901 15,239 13,739 Total Noninterest Income $ 78,335 $ 76,250 $ 152,559 $ 150,286 The Corporation's disaggregated revenue by major source is presented below: (continued) Risk Management and Shared Services Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 ($ in Thousands) Insurance commissions and fees $ 3 $ 7 $ 7 $ 32 Wealth management fees — 26 — 267 Service charges and deposit account fees 14 13 32 25 Card-based fees (a) 48 3 97 6 Other revenue 119 108 239 160 Noninterest Income (in-scope of Topic 606) $ 184 $ 156 $ 375 $ 490 Noninterest Income (out-of-scope of Topic 606) 3,000 2,242 8,343 5,570 Total Noninterest Income $ 3,185 $ 2,399 $ 8,718 $ 6,059 Consolidated Total Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 ($ in Thousands) Insurance commissions and fees $ 22,985 $ 23,996 $ 48,449 $ 46,644 Wealth management fees 20,691 20,333 40,870 40,975 Service charges and deposit account fees 15,426 16,390 30,542 32,810 Card-based fees (a) 10,177 10,155 19,472 19,628 Other revenue 1,843 1,952 4,327 5,496 Noninterest Income (in-scope of Topic 606) $ 71,122 $ 72,825 $ 143,660 $ 145,553 Noninterest Income (out-of-scope of Topic 606) 24,715 20,017 43,380 37,670 Total Noninterest Income $ 95,837 $ 92,842 $ 187,040 $ 183,222 (a) 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 on deposit accounts consist of monthly service fees (i.e. business analysis 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 on deposit accounts is 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 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)	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Lease, Cost and Cash Flows	Operating lease costs and cash flows resulting from operating lease are presented below: ($ in Thousands) Three Months Ended June 30, 2019 Six Months Ended June 30, 2019 Operating Lease Costs $ 2,888 $ 5,793 Operating Lease Cash Flows 2,762 5,570
Components of lease expense	The lease classifications on the consolidated balance sheets were as follows: June 30, 2019 ($ in Thousands) Amount Consolidated Balance Sheets Category Operating lease right-of-use asset $ 48,114 Premises and equipment Finance lease right-of-use asset — Other assets Operating lease liability 52,259 Accrued expenses and other liabilities Finance lease liability — Other long-term funding
Operating lease information	The lease payment obligations, weighted-average remaining lease term, and weighted-average discount rate were as follows: June 30, 2019 ($ in Thousands) Lease payments Weighted-average lease term (in years) Weighted-average discount rate Operating leases Equipment $ 256 1.10 2.73 % Retail and corporate offices 50,644 6.36 3.42 % Land 9,602 12.14 3.40 % Total operating leases $ 60,501 7.18 3.41 %
Amortization of operating lease liabilities	: ($ in Thousands) Amount Six Months Ending December 31, 2019 $ 6,447 2020 10,665 2021 9,942 2022 7,519 2023 5,379 Beyond 2023 20,550 Total lease payments 60,501 Less: interest 8,242 Present value of lease payments $ 52,259

Acquisitions Huntington Acquisi

Acquisitions Huntington Acquisition (Details) - USD ($) $ in Thousands	Jun. 14, 2019	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
June 14, 2019
Goodwill		$ 1,176,019	$ 1,169,023
Total liabilities		$ 725,719		$ 2,828,448
Huntington National Bank
Purchase Accounting Adjustments
Cash and cash equivalents	$ 0
Loans	(1,552)
Premises and equipment, net	4,967
Core deposit intangibles (included in other intangible assets, net on the face of the Consolidated Balance Sheet)	22,630
Other real estate owned (included in other assets on the face of the Consolidated Balance Sheet)	(2,561)
Others assets	0
Deposits	156
Other liabilities	70
June 14, 2019
Cash and cash equivalents	551,250
Loans	116,344
Premises and equipment, net	22,597
Goodwill	7,075
Core deposit intangibles (included in other intangible assets, net on the face of the Consolidated Balance Sheet)	22,630
Other real estate owned (included in other assets on the face of the Consolidated Balance Sheet)	5,263
Others assets	559
Total assets	725,719
Deposits	725,173
Other liabilities	546
Total liabilities	$ 725,719

Acquisitions (Details Textuals)

Acquisitions (Details Textuals) $ in Millions	Jun. 14, 2019USD ($)branch	Jun. 30, 2019acquisition
Business Acquisition [Line Items]
Number of Businesses Acquired | acquisition		1
Huntington National Bank
Business Acquisition [Line Items]
Business Combination, Control Obtained Description	This all cash transaction closed on June 14, 2019
Effective Date of Acquisition	Jun. 14, 2019
New Communities	13
Acquired Net Branches | branch	14
Goodwill acquired | $	$ 7
Amortization period	10 years

Summary of Significant Accoun_3

Summary of Significant Accounting Policies textuals (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use asset	$ 48,114	$ 52,000
Operating lease liability	$ 52,259	$ 56,000

Earnings Per Common Share (Deta

Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Calculations for basic and diluted earnings per common share
Net income	$ 84,661	$ 86,686	$ 89,192	$ 69,456	$ 171,347	$ 158,648
Preferred stock dividends	(3,801)		(2,329)		(7,601)	(4,668)
Net income available to common equity	80,860		86,863		163,746	153,980
Common shareholder dividends	(27,571)		(25,977)		(55,650)	(51,549)
Unvested share-based payment awards	(205)		(130)		(308)	(269)
Undistributed earnings	53,085		60,756		107,787	102,162
Undistributed earnings allocated to common shareholders	52,690		60,446		107,098	101,677
Undistributed earnings allocated to unvested share-based payment awards	395		310		689	485
Undistributed earnings	53,085		60,756		107,787	102,162
Basic
Distributed earnings to common shareholders	27,571		25,977		55,650	51,549
Undistributed earnings allocated to common shareholders	52,690		60,446		107,098	101,677
Total common shareholders earnings, basic	80,261		86,423		162,748	153,226
Diluted
Distributed earnings to common shareholders	27,571		25,977		55,650	51,549
Undistributed earnings allocated to common shareholders	52,690		60,446		107,098	101,677
Total common shareholders earnings, diluted	$ 80,261		$ 86,423		$ 162,748	$ 153,226
Weighted average common shares outstanding	162,180		170,633		163,049	167,096
Effect of dilutive common stock awards	1,492		2,146		1,469	2,080
Effect of dilutive common stock warrants	0		630		0	744
Diluted weighted average common shares outstanding	163,672		173,409		164,518	169,920
Basic earnings per common share	$ 0.49		$ 0.51		$ 1	$ 0.92
Diluted earnings per common share	$ 0.49		$ 0.50		$ 0.99	$ 0.90

Earnings Per Common Share (De_2

Earnings Per Common Share (Details Textuals) - shares shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
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	2	3	1

Stock-Based Compensation Fair V

Stock-Based Compensation Fair Value Assumptions of Stock Options (Details) - $ / shares	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Retirement Benefits [Abstract]
Dividend yield	3.30%	2.50%
Risk-free interest rate	2.60%	2.60%
Weighted average expected volatility	24.00%	22.00%
Weighted average expected life	5 years 9 months	5 years 9 months
Weighted average per share fair value of options	$ 4	$ 4.47

Stock-Based Compensation, Stock

Stock-Based Compensation, Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		6 Months Ended	12 Months Ended
		Jun. 30, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Stock Options Shares Outstanding, Beginning balance (in shares)	[1]	5,281
Granted	[1]	1,050
Exercised	[1]	(418)
Forfeited or expired	[1]	(85)
June 30, 2019	[1]	5,828	5,281
June 30, 2019	[1]	3,631
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
December 31, 2018		$ 19.09
Granted		22.77
Exercised, Weighted Average Exercise Price		15.68
Forfeited		23.96
June 30, 2019		19.94	$ 19.09
Options Exercisable, Weighted Average Exercise Price (in usd per share)		$ 18.04
Stock Options Outstanding, Weighted Average Remaining Contractual Term		6 years 7 months 9 days	6 years 2 months 4 days
Options exercisable, Weighted Average Remaining Contractual Term		5 years 3 months 25 days
Stock Options Outstanding, Aggregate Intrinsic Value		$ 14,870	$ 12,392
Options exercisable, Aggregate Intrinsic Value		$ 14,016
[1]	(a) In thousands

Stock-Based Compensation, Restr

Stock-Based Compensation, Restricted Stock Activity (Details) shares in Thousands	6 Months Ended
	Jun. 30, 2019$ / 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	1,993	[1]
Granted | shares	1,164	[1]
Vested | shares	(673)	[1]
Forfeited | shares	(38)	[1]
Outstanding Shares, Ending balance (in shares) | shares	2,446	[1]
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	$ 21.92
Granted, Weighted Average Grant Date Fair Value | $ / shares	22.21
Vested, Weighted Average Grant Date Fair Value | $ / shares	20.49
Forfeited, Weighted Average Grant Date Fair Value | $ / shares	24.14
Outstanding Weighted Average Grant Date Fair Value, Ending balance (in usd per share) | $ / shares	$ 22.42
[1]	(a) In thousands

Stock-Based Compensation (Detai

Stock-Based Compensation (Details Textuals) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award
Intrinsic value of stock options exercised	$ 3	$ 9
Total fair value of vested stock options	$ 4	$ 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%
Performance-based Restricted Stock Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		3 years
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award
Recognized compensation expense for vesting	$ 3	$ 2
Recognized compensation expense for accelerated vesting	1
Unvested share-based payment awards	$ 6
Remaining requisite service periods, extend through	first quarter 2023
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
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
Service-based Restricted Stock Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		4 years
Restricted Stock Award
Share-based Compensation Arrangement by Share-based Payment Award
Recognized compensation expense for vesting	$ 13	$ 6
Recognized compensation expense for accelerated vesting	3
Unvested share-based payment awards	$ 28
Remaining requisite service periods, extend through	first quarter 2023

Investment Securities, AFS and

Investment Securities, AFS and HTM Securities Amortized Costs and Fair Values (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Investment securities available for sale:
Amortized Cost	$ 3,290,593	$ 4,041,902
Gross Unrealized Gains	16,825	3,649
Gross Unrealized Losses	(23,962)	(98,610)
Fair Value	3,283,456	3,946,941
Debt Securities, Held-to-maturity
Held to Maturity, Amortized Cost	2,806,064	2,740,511
Held-to-maturity, Gross Unrealized Gains	80,230	17,593
Held-to-maturity, Gross Unrealized Loss	(11,537)	(47,835)
Held-to-maturity, Fair Value	2,874,758	2,710,271
US Treasury Securities
Investment securities available for sale:
Amortized Cost		1,000
Gross Unrealized Gains		0
Gross Unrealized Losses		(1)
Fair Value		999
Debt Securities, Held-to-maturity
Held to Maturity, Amortized Cost	999
Held-to-maturity, Gross Unrealized Gains	20
Held-to-maturity, Gross Unrealized Loss	0
Held-to-maturity, Fair Value	1,019
Obligations of state and political subdivisions (municipal securities)
Debt Securities, Held-to-maturity
Held to Maturity, Amortized Cost	1,913,737	1,790,683
Held-to-maturity, Gross Unrealized Gains	68,372	8,255
Held-to-maturity, Gross Unrealized Loss	(152)	(15,279)
Held-to-maturity, Fair Value	1,981,957	1,783,659
Private-label
Investment securities available for sale:
Amortized Cost	805	1,007
Gross Unrealized Gains	9	0
Gross Unrealized Losses	0	(4)
Fair Value	814	1,003
Debt Securities, Held-to-maturity
Held to Maturity, Amortized Cost	0
Held-to-maturity, Fair Value	0
FFELP asset backed securities
Investment securities available for sale:
Amortized Cost	274,520	297,347
Gross Unrealized Gains	152	711
Gross Unrealized Losses	(1,535)	(698)
Fair Value	273,137	297,360
Debt 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
GNMA | Residential Related Securities
Investment securities available for sale:
Amortized Cost	1,325,739	2,169,943
Gross Unrealized Gains	7,942	473
Gross Unrealized Losses	(2,048)	(41,885)
Fair Value	1,331,633	2,128,531
Debt Securities, Held-to-maturity
Held to Maturity, Amortized Cost	321,046	351,606
Held-to-maturity, Gross Unrealized Gains	3,430	1,611
Held-to-maturity, Gross Unrealized Loss	(292)	(8,181)
Held-to-maturity, Fair Value	324,184	345,035
GNMA | Commercial mortgage-related securities
Investment securities available for sale:
Amortized Cost	1,483,392	1,273,309
Gross Unrealized Gains	6,217	0
Gross Unrealized Losses	(19,562)	(52,512)
Fair Value	1,470,048	1,220,797
Debt Securities, Held-to-maturity
Held to Maturity, Amortized Cost	481,205	505,434
Held-to-maturity, Gross Unrealized Gains	7,264	7,559
Held-to-maturity, Gross Unrealized Loss	(10,948)	(22,579)
Held-to-maturity, Fair Value	477,521	490,414
FNMA/FHLMC | Residential Related Securities
Investment securities available for sale:
Amortized Cost	182,893	296,296
Gross Unrealized Gains	1,646	2,466
Gross Unrealized Losses	(817)	(3,510)
Fair Value	183,722	295,252
Debt Securities, Held-to-maturity
Held to Maturity, Amortized Cost	89,078	92,788
Held-to-maturity, Gross Unrealized Gains	1,143	169
Held-to-maturity, Gross Unrealized Loss	(145)	(1,795)
Held-to-maturity, Fair Value	90,076	$ 91,162
FNMA/FHLMC | Commercial mortgage-related securities
Investment securities available for sale:
Amortized Cost	20,244
Gross Unrealized Gains	858
Gross Unrealized Losses	0
Fair Value	21,102
Debt Securities, Held-to-maturity
Held to Maturity, Amortized Cost	0
Held-to-maturity, Fair Value	$ 0

Investment Securities, AFS an_2

Investment Securities, AFS and HTM Contractual Maturities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Amortized Cost
Available for Sale, Due in one year or less	$ 1,000
Available for Sale, Due after one year through five years	2,000
Available for Sale, Due after five years through ten years	0
Available for Sale, Due after ten years	0
Available for Sale, Total debt securities	3,000
Available for Sale, amortized cost	3,290,593	$ 4,041,902
Fair Value
Available for Sale, Due in one year or less	1,000
Available for Sale, Due after one year through five years	2,000
Available for Sale, Due after five years through ten years	0
Available for Sale, Due after ten years	0
Available for Sale, Total debt securities	3,000
Investment securities available for sale, at fair value	$ 3,283,456	3,946,941
Available for Sale, Ratio of Fair Value to Amortized Cost	99.80%
Amortized Cost
Held to Maturity, Due in one year or less	$ 48,235
Held to Maturity, Due after one year through five years	184,581
Held to Maturity, Due after five years through ten years	479,215
Held to Maturity, Due after ten years	1,202,705
Held to Maturity, Total Debt Securities	1,914,735
Held to Maturity, Amortized Cost	2,806,064	2,740,511
Fair Value
Held to Maturity, Due in one year or less	48,393
Held to Maturity, Due after one year through five years	185,909
Held to Maturity, Due after five years through ten years	491,122
Held to Maturity, Due after ten years	1,257,552
Held to Maturity, Securities, Debt Securities	1,982,976
Held to Maturity, Total debt securities at fair value	$ 2,874,758	2,710,271
Held to Maturity, Ratio of Fair Value to Amortized Cost	102.40%
Private-label
Amortized Cost
Available for Sale, amortized cost	$ 805	1,007
Fair Value
Investment securities available for sale, at fair value	814	1,003
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	274,520	297,347
Fair Value
Investment securities available for sale, at fair value	273,137	297,360
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	182,893	296,296
Fair Value
Investment securities available for sale, at fair value	183,722	295,252
Amortized Cost
Held to Maturity, Amortized Cost	89,078	92,788
Fair Value
Held to Maturity, Total debt securities at fair value	90,076	91,162
FNMA/FHLMC | Commercial mortgage-related securities
Amortized Cost
Available for Sale, amortized cost	20,244
Fair Value
Investment securities available for sale, at fair value	21,102
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	1,325,739	2,169,943
Fair Value
Investment securities available for sale, at fair value	1,331,633	2,128,531
Amortized Cost
Held to Maturity, Amortized Cost	321,046	351,606
Fair Value
Held to Maturity, Total debt securities at fair value	324,184	345,035
GNMA | Commercial mortgage-related securities
Amortized Cost
Available for Sale, amortized cost	1,483,392	1,273,309
Fair Value
Investment securities available for sale, at fair value	1,470,048	1,220,797
Amortized Cost
Held to Maturity, Amortized Cost	481,205	505,434
Fair Value
Held to Maturity, Total debt securities at fair value	$ 477,521	$ 490,414

Investment Securities Gain_Loss

Investment Securities Gain/Loss Sale of Securities (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Gross gains on available for sale securities	$ 2,334	$ 0
Gross gains on held to maturity securities	0	0
Total gains	2,334	0
Gross losses on available for sale securities	(13,636)	(2,015)
Gross losses on held to maturity securities	0	0
Total losses	(13,636)	(2,015)
Write-up of equity securities without readily determinable fair values	13,444	0
Investment securities gains (losses), net	2,143	(2,015)
Proceeds from sales of investment securities	$ 934,228	$ 493,060

Investment Securities, AFS an_3

Investment Securities, AFS and HTM Securities Gross Unrealized Losses (Details) $ in Thousands	Jun. 30, 2019USD ($)security	Dec. 31, 2018USD ($)security
Investment securities available for sale
Unrealized losses on available for sale securities, less than 12 months	$ (1,982)	$ (5,262)
Unrealized losses on available for sale securities, 12 months or more	(21,979)	(93,347)
Total unrealized losses on available for sale securities	(23,962)	(98,610)
Fair value of unrealized losses on available for sale securities, less than 12 months	262,504	613,612
Fair value of unrealized losses on available for sale securities, 12 months or more	1,447,194	3,009,417
Total fair value of unrealized losses on available for sale securities	$ 1,709,698	$ 3,623,028
Available-for-sale, Number of Securities
Available for sale, number of securities, less than 12 months | security	24	41
Available for sale, number of securities, 12 months or more | security	98	190
Investment securities held to maturity
Unrealized losses on held to maturity securities, less than 12 months	$ (63)	$ (4,053)
Unrealized losses on held to maturity securities, 12 months or more	(11,474)	(43,780)
Total unrealized losses on held to maturity securities	$ (11,537)	$ (47,835)
Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, 12 Months or Longer | security	109	865
Fair value of unrealized losses on held to maturity securities, less than 12 months	$ 10,918	$ 390,929
Fair value of unrealized losses on held to maturity securities, 12 months or more	483,712	1,349,063
Total fair value of unrealized losses on held to maturity securities	$ 494,630	$ 1,739,992
Held-to-maturity, Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions, less than 12 Months | security	9	298
US Treasury 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		(1)
Total unrealized losses on available for sale securities		(1)
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		999
Total fair value of unrealized losses on available for sale securities		$ 999
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		1
Obligations of state and political subdivisions (municipal securities)
Investment securities held to maturity
Unrealized losses on held to maturity securities, less than 12 months	$ (12)	$ (2,860)
Unrealized losses on held to maturity securities, 12 months or more	(140)	(12,419)
Total unrealized losses on held to maturity securities	(152)	(15,279)
Fair value of unrealized losses on held to maturity securities, less than 12 months	3,962	313,212
Fair value of unrealized losses on held to maturity securities, 12 months or more	25,109	509,374
Total fair value of unrealized losses on held to maturity securities	$ 29,071	$ 822,586
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	8	272
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	50	752
Private-label
Investment securities available for sale
Unrealized losses on available for sale securities, less than 12 months		$ (4)
Unrealized losses on available for sale securities, 12 months or more		0
Total unrealized losses on available for sale securities		(4)
Fair value of unrealized losses on available for sale securities, less than 12 months		1,003
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		$ 1,003
Available-for-sale, Number of Securities
Available for sale, number of securities, less than 12 months | security		1
Available for sale, number of securities, 12 months or more | security		0
FFELP asset backed securities
Investment securities available for sale
Unrealized losses on available for sale securities, less than 12 months	$ (1,380)	$ (698)
Unrealized losses on available for sale securities, 12 months or more	(155)	0
Total unrealized losses on available for sale securities	(1,535)	(698)
Fair value of unrealized losses on available for sale securities, less than 12 months	205,710	142,432
Fair value of unrealized losses on available for sale securities, 12 months or more	5,839	0
Total fair value of unrealized losses on available for sale securities	$ 211,550	$ 142,432
Available-for-sale, Number of Securities
Available for sale, number of securities, less than 12 months | security	16	13
Available for sale, number of securities, 12 months or more | security	1	0
Asset-backed Securities, Securitized Loans and Receivables [Member]
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	0
Total unrealized losses on available for sale securities	0
Fair value of unrealized losses on available for sale securities, less than 12 months	3,000
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	$ 3,000
Available-for-sale, Number of Securities
Available for sale, number of securities, less than 12 months | security	3
Available for sale, number of securities, 12 months or more | security	0
FNMA/FHLMC | Residential Related Securities
Investment securities available for sale
Unrealized losses on available for sale securities, less than 12 months	$ 0	$ (31)
Unrealized losses on available for sale securities, 12 months or more	(817)	(3,479)
Total unrealized losses on available for sale securities	(817)	(3,510)
Fair value of unrealized losses on available for sale securities, less than 12 months	781	17,993
Fair value of unrealized losses on available for sale securities, 12 months or more	121,661	189,405
Total fair value of unrealized losses on available for sale securities	$ 122,441	$ 207,398
Available-for-sale, Number of Securities
Available for sale, number of securities, less than 12 months | security	3	15
Available for sale, number of securities, 12 months or more | security	14	17
Investment securities held to maturity
Unrealized losses on held to maturity securities, less than 12 months	$ 0	$ (780)
Unrealized losses on held to maturity securities, 12 months or more	(145)	(1,015)
Total unrealized losses on held to maturity securities	(145)	(1,795)
Fair value of unrealized losses on held to maturity securities, less than 12 months	0	57,896
Fair value of unrealized losses on held to maturity securities, 12 months or more	18,474	28,888
Total fair value of unrealized losses on held to maturity securities	$ 18,474	$ 86,784
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	0	13
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	10	22
GNMA | Residential Related Securities
Investment securities available for sale
Unrealized losses on available for sale securities, less than 12 months	$ (602)	$ (4,529)
Unrealized losses on available for sale securities, 12 months or more	(1,446)	(37,355)
Total unrealized losses on available for sale securities	(2,048)	(41,885)
Fair value of unrealized losses on available for sale securities, less than 12 months	53,013	452,183
Fair value of unrealized losses on available for sale securities, 12 months or more	316,714	1,598,159
Total fair value of unrealized losses on available for sale securities	$ 369,727	$ 2,050,342
Available-for-sale, Number of Securities
Available for sale, number of securities, less than 12 months | security	2	12
Available for sale, number of securities, 12 months or more | security	13	79
Investment securities held to maturity
Unrealized losses on held to maturity securities, less than 12 months	$ (51)	$ (414)
Unrealized losses on held to maturity securities, 12 months or more	(241)	(7,767)
Total unrealized losses on held to maturity securities	(292)	(8,181)
Fair value of unrealized losses on held to maturity securities, less than 12 months	6,956	19,822
Fair value of unrealized losses on held to maturity securities, 12 months or more	35,339	320,387
Total fair value of unrealized losses on held to maturity securities	$ 42,295	$ 340,209
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	1	13
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	27	66
GNMA | Commercial mortgage-related 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	(19,562)	(52,512)
Total unrealized losses on available for sale securities	(19,562)	(52,512)
Fair value of unrealized losses on available for sale securities, less than 12 months	0	0
Fair value of unrealized losses on available for sale securities, 12 months or more	1,002,980	1,220,854
Total fair value of unrealized losses on available for sale securities	$ 1,002,980	$ 1,220,854
Available-for-sale, Number of Securities
Available for sale, number of securities, less than 12 months | security	0	0
Available for sale, number of securities, 12 months or more | security	70	93
Investment securities held to maturity
Unrealized losses on held to maturity securities, less than 12 months	$ 0	$ 0
Unrealized losses on held to maturity securities, 12 months or more	(10,948)	(22,579)
Total unrealized losses on held to maturity securities	(10,948)	(22,579)
Fair value of unrealized losses on held to maturity securities, less than 12 months	0	0
Fair value of unrealized losses on held to maturity securities, 12 months or more	404,790	490,414
Total fair value of unrealized losses on held to maturity securities	$ 404,790	$ 490,414
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	0	0
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	22	25

Investment Securities (Details

Investment Securities (Details Textual) - USD ($) $ in Thousands	Feb. 01, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Business Acquisition [Line Items]
Debt Securities, Available-for-sale, Sold at Par Value			$ 40,000
Investment Securities (Textuals) [Abstract]
Proceeds from sales of investment securities		$ 934,228	$ 493,060
Visa Restricted Stock Donated		42,039
Visa Restricted Stock Owned		77,000
Pledged Financial Instruments, Not Separately Reported, Securities		$ 3,300,000		$ 3,000,000
Federal Home Loan Bank Stock		125,000		173,000
Federal Reserve Bank Stock		78,000		77,000
Equity securities with readily determinable fair values, Fair Value		2,000		2,000
Equity Securities without Readily Determinable Fair Value, Amount		$ 13,000		$ 0
Bank Mutual
Business Acquisition [Line Items]
Debt Securities, Available-for-sale, Sold at Par Value	$ 453,000

Loans Composition (Details)

Loans Composition (Details) - USD ($) $ in Thousands		Jun. 30, 2019	Dec. 31, 2018
Loans and Leases Receivable Disclosure [Line Items]
Total loans	[1]	$ 23,249,967	$ 22,940,429
Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Total loans		7,579,384	7,398,044
Commercial real estate — owner occupied
Loans and Leases Receivable Disclosure [Line Items]
Total loans		942,811	920,443
Commercial and business lending
Loans and Leases Receivable Disclosure [Line Items]
Total loans		8,522,194	8,318,487
Commercial real estate — investor
Loans and Leases Receivable Disclosure [Line Items]
Total loans		3,779,201	3,751,554
Real estate construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans		1,394,815	1,335,031
Commercial real estate lending
Loans and Leases Receivable Disclosure [Line Items]
Total loans		5,174,016	5,086,585
Total commercial
Loans and Leases Receivable Disclosure [Line Items]
Total loans		13,696,210	13,405,072
Residential mortgage
Loans and Leases Receivable Disclosure [Line Items]
Total loans		8,277,479	8,277,712
Home equity
Loans and Leases Receivable Disclosure [Line Items]
Total loans		916,213	894,473
Other consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans		360,065	363,171
Total consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans		9,553,757	9,535,357
Bank Mutual
Loans and Leases Receivable Disclosure [Line Items]
Purchased credit-impaired loans		$ 2,000	$ 5,000
[1]	(a) Includes $2 million and $5 million of purchased credit-impaired loans at June 30, 2019 and December 31, 2018 , respectively.

Loans Credit Quality Indicator

Loans Credit Quality Indicator (Details) - USD ($) $ in Thousands		Jun. 30, 2019	Dec. 31, 2018
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	[1]	$ 23,249,967	$ 22,940,429
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		22,777,758	22,438,605
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		139,660	123,988
Potential Problem
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		165,842	249,935
Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		166,707	127,901
Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		7,579,384	7,398,044
Commercial and industrial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		7,387,549	7,162,370
Commercial and industrial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		49,026	78,075
Commercial and industrial | Potential Problem
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		58,658	116,578
Commercial and industrial | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		84,151	41,021
Commercial real estate — owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		942,811	920,443
Commercial real estate — owner occupied | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		909,641	854,265
Commercial real estate — owner occupied | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		8,362	6,257
Commercial real estate — owner occupied | Potential Problem
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		24,237	55,964
Commercial real estate — owner occupied | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		571	3,957
Commercial and business lending
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		8,522,194	8,318,487
Commercial and business lending | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		8,297,189	8,016,635
Commercial and business lending | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		57,388	84,332
Commercial and business lending | Potential Problem
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		82,895	172,542
Commercial and business lending | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		84,722	44,978
Commercial real estate — investor
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		3,779,201	3,751,554
Commercial real estate — investor | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		3,628,197	3,653,642
Commercial real estate — investor | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		71,753	28,479
Commercial real estate — investor | Potential Problem
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		77,766	67,481
Commercial real estate — investor | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		1,485	1,952
Real estate construction
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		1,394,815	1,335,031
Real estate construction | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		1,382,502	1,321,447
Real estate construction | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		8,720	8,771
Real estate construction | Potential Problem
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		3,166	3,834
Real estate construction | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		427	979
Commercial real estate lending
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		5,174,016	5,086,585
Commercial real estate lending | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		5,010,699	4,975,089
Commercial real estate lending | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		80,473	37,249
Commercial real estate lending | Potential Problem
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		80,932	71,315
Commercial real estate lending | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		1,912	2,931
Total commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		13,696,210	13,405,072
Total commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		13,307,888	12,991,724
Total commercial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		137,860	121,582
Total commercial | Potential Problem
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		163,828	243,856
Total commercial | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		86,634	47,909
Residential mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		8,277,479	8,277,712
Residential mortgage | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		8,206,689	8,203,729
Residential mortgage | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		641	434
Residential mortgage | Potential Problem
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		1,983	5,975
Residential mortgage | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		68,166	67,574
Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		916,213	894,473
Home equity | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		903,694	880,808
Home equity | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		652	1,223
Home equity | Potential Problem
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		32	103
Home equity | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		11,835	12,339
Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		360,065	363,171
Other consumer | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		359,487	362,343
Other consumer | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		506	749
Other consumer | Potential Problem
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		0	0
Other consumer | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		72	79
Total consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		9,553,757	9,535,357
Total consumer | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		9,469,870	9,446,881
Total consumer | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		1,799	2,406
Total consumer | Potential Problem
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		2,014	6,078
Total consumer | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		$ 80,073	$ 79,992
[1]	(a) Includes $2 million and $5 million of purchased credit-impaired loans at June 30, 2019 and December 31, 2018 , respectively.

Loans Past Due Status (Details)

Loans Past Due Status (Details) - USD ($) $ in Thousands		Jun. 30, 2019		Dec. 31, 2018
Summarized details of Loans
Current		$ 23,055,291		$ 22,785,019
Nonaccrual		166,707	[1]	127,901	[2]
Total loans	[3]	23,249,967		22,940,429
Nonaccrual Loans, Current Portion		$ 90,000		$ 74,000
Percent of current nonaccrual loans		54.00%		58.00%
30-59 Days Past Due
Summarized details of Loans
Total Past Due		$ 23,824		$ 21,550
60-89 Days Past Due
Summarized details of Loans
Total Past Due		2,057		3,795
90 Days or More Past Due
Summarized details of Loans
Total Past Due		2,088		2,165
Commercial and industrial
Summarized details of Loans
Current		7,490,030		7,356,187
Nonaccrual		84,151		41,021
Total loans		7,579,384		7,398,044
Commercial and industrial | 30-59 Days Past Due
Summarized details of Loans
Total Past Due		4,769		187
Commercial and industrial | 60-89 Days Past Due
Summarized details of Loans
Total Past Due		139		338
Commercial and industrial | 90 Days or More Past Due
Summarized details of Loans
Total Past Due		293		311
Commercial real estate — owner occupied
Summarized details of Loans
Current		940,222		913,787
Nonaccrual		571		3,957
Total loans		942,811		920,443
Commercial real estate — owner occupied | 30-59 Days Past Due
Summarized details of Loans
Total Past Due		2,018		2,580
Commercial real estate — owner occupied | 60-89 Days Past Due
Summarized details of Loans
Total Past Due		0		119
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		8,430,252		8,269,974
Nonaccrual		84,722		44,978
Total loans		8,522,194		8,318,487
Commercial and business lending | 30-59 Days Past Due
Summarized details of Loans
Total Past Due		6,787		2,767
Commercial and business lending | 60-89 Days Past Due
Summarized details of Loans
Total Past Due		139		457
Commercial and business lending | 90 Days or More Past Due
Summarized details of Loans
Total Past Due		293		311
Commercial real estate — investor
Summarized details of Loans
Current		3,776,334		3,745,835
Nonaccrual		1,485		1,952
Total loans		3,779,201		3,751,554
Commercial real estate — investor | 30-59 Days Past Due
Summarized details of Loans
Total Past Due		1,382		2,954
Commercial real estate — investor | 60-89 Days Past Due
Summarized details of Loans
Total Past Due		0		813
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		1,394,237		1,333,722
Nonaccrual		427		979
Total loans		1,394,815		1,335,031
Real estate construction | 30-59 Days Past Due
Summarized details of Loans
Total Past Due		131		330
Real estate construction | 60-89 Days Past Due
Summarized details of Loans
Total Past Due		19		0
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		5,170,572		5,079,557
Nonaccrual		1,912		2,931
Total loans		5,174,016		5,086,585
Commercial real estate lending | 30-59 Days Past Due
Summarized details of Loans
Total Past Due		1,513		3,284
Commercial real estate lending | 60-89 Days Past Due
Summarized details of Loans
Total Past Due		19		813
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		13,600,824		13,349,531
Nonaccrual		86,634		47,909
Total loans		13,696,210		13,405,072
Total commercial | 30-59 Days Past Due
Summarized details of Loans
Total Past Due		8,300		6,051
Total commercial | 60-89 Days Past Due
Summarized details of Loans
Total Past Due		159		1,270
Total commercial | 90 Days or More Past Due
Summarized details of Loans
Total Past Due		293		311
Residential mortgage
Summarized details of Loans
Current		8,199,557		8,200,432
Nonaccrual		68,166		67,574
Total loans		8,277,479		8,277,712
Residential mortgage | 30-59 Days Past Due
Summarized details of Loans
Total Past Due		9,199		9,272
Residential mortgage | 60-89 Days Past Due
Summarized details of Loans
Total Past Due		558		434
Residential mortgage | 90 Days or More Past Due
Summarized details of Loans
Total Past Due		0		0
Home equity
Summarized details of Loans
Current		898,550		876,085
Nonaccrual		11,835		12,339
Total loans		916,213		894,473
Home equity | 30-59 Days Past Due
Summarized details of Loans
Total Past Due		5,176		4,826
Home equity | 60-89 Days Past Due
Summarized details of Loans
Total Past Due		652		1,223
Home equity | 90 Days or More Past Due
Summarized details of Loans
Total Past Due		0		0
Other consumer
Summarized details of Loans
Current		356,360		358,970
Nonaccrual		72		79
Total loans		360,065		363,171
Other consumer | 30-59 Days Past Due
Summarized details of Loans
Total Past Due		1,150		1,401
Other consumer | 60-89 Days Past Due
Summarized details of Loans
Total Past Due		688		868
Other consumer | 90 Days or More Past Due
Summarized details of Loans
Total Past Due		1,795		1,853
Total consumer
Summarized details of Loans
Current		9,454,467		9,435,487
Nonaccrual		80,073		79,992
Total loans		9,553,757		9,535,357
Total consumer | 30-59 Days Past Due
Summarized details of Loans
Total Past Due		15,524		15,499
Total consumer | 60-89 Days Past Due
Summarized details of Loans
Total Past Due		1,898		2,525
Total consumer | 90 Days or More Past Due
Summarized details of Loans
Total Past Due		$ 1,795		$ 1,853
[1]	(a) Of the total nonaccrual loans, $90 million , or 54% , were current with respect to payment at June 30, 2019
[2]	(a) Of the total nonaccrual loans, $74 million , or 58% , were current with respect to payment at December 31, 2018 .
[3]	(a) Includes $2 million and $5 million of purchased credit-impaired loans at June 30, 2019 and December 31, 2018 , respectively.

Loans, Impaired Loans Recorded

Loans, Impaired Loans Recorded Investment, Unpaid Principal Balance, Related Allowance, Average Recorded Investment, and Interest Income Recognized (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2019		Dec. 31, 2018
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	$ 172,489	[1]	$ 133,690	[2]
Unpaid Principal Balance	207,111	[1]	164,766	[2]
Related Allowance	32,188	[1]	15,304	[2]
Average Recorded Investment	142,258		145,707
Interest Income Recognized	$ 2,633		$ 3,626
Net Recorded Investment of the Impaired Loans	68.00%		72.00%
Loans with a related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	$ 143,414		$ 96,609
Unpaid Principal Balance	158,952		102,483
Related Allowance	32,188		15,304
Average Recorded Investment	109,565		110,079
Interest Income Recognized	2,417		3,699
Loans with no related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	29,075		37,081
Unpaid Principal Balance	48,159		62,283
Related Allowance	0		0
Average Recorded Investment	32,694		35,627
Interest Income Recognized	216		73
Commercial and industrial
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	100,066		63,153
Unpaid Principal Balance	128,758		87,155
Related Allowance	22,890		5,721
Average Recorded Investment	71,421		73,813
Interest Income Recognized	1,129		823
Commercial and industrial | Loans with a related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	83,561		40,747
Unpaid Principal Balance	94,759		42,131
Related Allowance	22,890		5,721
Average Recorded Investment	48,118		52,461
Interest Income Recognized	1,104		1,167
Commercial and industrial | Loans with no related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	16,505		22,406
Unpaid Principal Balance	33,999		45,024
Related Allowance	0		0
Average Recorded Investment	23,303		21,352
Interest Income Recognized	25		344
Commercial real estate — owner occupied
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	2,473		5,852
Unpaid Principal Balance	2,712		6,910
Related Allowance	27		24
Average Recorded Investment	2,586		6,154
Interest Income Recognized	54		104
Commercial real estate — owner occupied | Loans with a related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	1,970		2,080
Unpaid Principal Balance	1,977		2,087
Related Allowance	27		24
Average Recorded Investment	2,017		2,179
Interest Income Recognized	51		104
Commercial real estate — owner occupied | Loans with no related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	503		3,772
Unpaid Principal Balance	735		4,823
Related Allowance	0		0
Average Recorded Investment	569		3,975
Interest Income Recognized	3		0
Commercial and business lending
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	102,538		69,005
Unpaid Principal Balance	131,470		94,065
Related Allowance	22,917		5,745
Average Recorded Investment	74,007		79,967
Interest Income Recognized	1,183		927
Commercial and business lending | Loans with a related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	85,531		42,827
Unpaid Principal Balance	96,735		44,218
Related Allowance	22,917		5,745
Average Recorded Investment	50,135		54,640
Interest Income Recognized	1,155		1,271
Commercial and business lending | Loans with no related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	17,007		26,178
Unpaid Principal Balance	34,734		49,847
Related Allowance	0		0
Average Recorded Investment	23,872		25,327
Interest Income Recognized	28		344
Commercial real estate — investor
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	1,411		2,384
Unpaid Principal Balance	2,587		3,625
Related Allowance	103		28
Average Recorded Investment	1,424		1,807
Interest Income Recognized	17		106
Commercial real estate — investor | Loans with a related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	776		799
Unpaid Principal Balance	782		805
Related Allowance	103		28
Average Recorded Investment	786		827
Interest Income Recognized	17		38
Commercial real estate — investor | Loans with no related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	635		1,585
Unpaid Principal Balance	1,805		2,820
Related Allowance	0		0
Average Recorded Investment	638		980
Interest Income Recognized	0		68
Real estate construction
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	417		510
Unpaid Principal Balance	497		589
Related Allowance	56		75
Average Recorded Investment	422		533
Interest Income Recognized	14		32
Real estate construction | Loans with a related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	417		510
Unpaid Principal Balance	497		589
Related Allowance	56		75
Average Recorded Investment	422		533
Interest Income Recognized	14		32
Real estate construction | Loans with no related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Related Allowance	0		0
Average Recorded Investment	0		0
Interest Income Recognized	0		0
Commercial real estate lending
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	1,828		2,894
Unpaid Principal Balance	3,084		4,214
Related Allowance	159		103
Average Recorded Investment	1,847		2,340
Interest Income Recognized	31		138
Commercial real estate lending | Loans with a related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	1,193		1,309
Unpaid Principal Balance	1,279		1,394
Related Allowance	159		103
Average Recorded Investment	1,208		1,360
Interest Income Recognized	31		70
Commercial real estate lending | Loans with no related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	635		1,585
Unpaid Principal Balance	1,805		2,820
Related Allowance	0		0
Average Recorded Investment	638		980
Interest Income Recognized	0		68
Total commercial
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	104,367		71,899
Unpaid Principal Balance	134,554		98,279
Related Allowance	23,076		5,848
Average Recorded Investment	75,853		82,307
Interest Income Recognized	1,214		1,065
Total commercial | Loans with a related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	86,724		44,136
Unpaid Principal Balance	98,015		45,612
Related Allowance	23,076		5,848
Average Recorded Investment	51,343		56,000
Interest Income Recognized	1,186		1,341
Total commercial | Loans with no related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	17,642		27,763
Unpaid Principal Balance	36,539		52,667
Related Allowance	0		0
Average Recorded Investment	24,511		26,307
Interest Income Recognized	28		276
Residential mortgage
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	56,272		50,486
Unpaid Principal Balance	59,694		54,223
Related Allowance	5,693		6,023
Average Recorded Investment	54,136		51,477
Interest Income Recognized	1,168		1,992
Residential mortgage | Loans with a related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	45,856		41,691
Unpaid Principal Balance	49,110		45,149
Related Allowance	5,693		6,023
Average Recorded Investment	45,953		42,687
Interest Income Recognized	991		1,789
Residential mortgage | Loans with no related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	10,416		8,795
Unpaid Principal Balance	10,584		9,074
Related Allowance	0		0
Average Recorded Investment	8,183		8,790
Interest Income Recognized	178		203
Home equity
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	10,626		10,124
Unpaid Principal Balance	11,636		11,081
Related Allowance	3,233		3,312
Average Recorded Investment	11,042		10,739
Interest Income Recognized	251		566
Home equity | Loans with a related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	9,609		9,601
Unpaid Principal Balance	10,600		10,539
Related Allowance	3,233		3,312
Average Recorded Investment	11,042		10,209
Interest Income Recognized	240		566
Home equity | Loans with no related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	1,017		523
Unpaid Principal Balance	1,036		542
Related Allowance	0		0
Average Recorded Investment	0		530
Interest Income Recognized	11		0
Other consumer
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	1,225		1,181
Unpaid Principal Balance	1,227		1,183
Related Allowance	185		121
Average Recorded Investment	1,227		1,184
Interest Income Recognized	0		3
Other consumer | Loans with a related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	1,225		1,181
Unpaid Principal Balance	1,227		1,183
Related Allowance	185		121
Average Recorded Investment	1,227		1,184
Interest Income Recognized	0		3
Other consumer | Loans with no related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Related Allowance	0		0
Average Recorded Investment	0		0
Interest Income Recognized	0		0
Total consumer
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	68,122		61,791
Unpaid Principal Balance	72,557		66,487
Related Allowance	9,112		9,456
Average Recorded Investment	66,405		63,400
Interest Income Recognized	1,420		2,561
Total consumer | Loans with a related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	56,690		52,473
Unpaid Principal Balance	60,938		56,871
Related Allowance	9,112		9,456
Average Recorded Investment	58,222		54,080
Interest Income Recognized	1,231		2,358
Total consumer | Loans with no related allowance
Loan and Lease Receivables, Impaired [Abstract]
Recorded Investment	11,432		9,318
Unpaid Principal Balance	11,620		9,616
Related Allowance	0		0
Average Recorded Investment	8,183		9,320
Interest Income Recognized	$ 189		$ 203
[1]	(a) The net recorded investment (defined as recorded investment, net of the related allowance) of the impaired loans represented 68% of the unpaid principal balance at June 30, 2019
[2]	(a) The net recorded investment (defined as recorded investment, net of the related allowance) of the impaired loans represented 72% of the unpaid principal balance at December 31, 2018 .

Loans, Troubled Debt Restructur

Loans, Troubled Debt Restructurings Performing and Nonaccrual (Details) - USD ($) $ in Thousands		Jun. 30, 2019	Dec. 31, 2018
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans		$ 45,481	$ 53,263
Nonaccrual Restructured Loans	[1]	24,332	26,292
Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans		16,850	25,478
Nonaccrual Restructured Loans	[1]	101	249
Commercial real estate — owner occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans		1,970	2,080
Nonaccrual Restructured Loans	[1]	0	0
Commercial real estate — investor
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans		315	799
Nonaccrual Restructured Loans	[1]	461	933
Real estate construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans		232	311
Nonaccrual Restructured Loans	[1]	185	198
Residential mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans		17,645	16,036
Nonaccrual Restructured Loans	[1]	21,213	22,279
Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans		7,247	7,385
Nonaccrual Restructured Loans	[1]	2,369	2,627
Other consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Performing Restructured Loans		1,222	1,174
Nonaccrual Restructured Loans	[1]	$ 3	$ 6
[1]	(a) Nonaccrual restructured loans have been included within nonaccrual loans.

Loans, Loans Modified in a Trou

Loans, Loans Modified in a Troubled Debt Restructuring (Details) $ in Thousands		6 Months Ended
		Jun. 30, 2019USD ($)loan	Jun. 30, 2018USD ($)loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan		58	23
Recorded Investment	[1]	$ 6,370	$ 4,035
Unpaid Principal Balance	[2]	$ 6,394	$ 4,099
Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan		1	1
Recorded Investment	[1]	$ 196	$ 47
Unpaid Principal Balance	[2]	$ 196	$ 47
Commercial real estate — investor
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan		0	1
Recorded Investment	[1]	$ 0	$ 984
Unpaid Principal Balance	[2]	$ 0	$ 1,031
Residential mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan		38	10
Recorded Investment	[1]	$ 5,665	$ 2,064
Unpaid Principal Balance	[2]	$ 5,682	$ 2,064
Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan		18	10
Recorded Investment	[1]	$ 499	$ 935
Unpaid Principal Balance	[2]	$ 506	$ 949
Other consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan		1	1
Recorded Investment	[1]	$ 10	$ 5
Unpaid Principal Balance	[2]	$ 10	$ 8
[1]	(a) Represents post-modification outstanding recorded investment.
[2]	(b) Represents pre-modification outstanding recorded investment.

Loans, Troubled Debt Restruct_2

Loans, Troubled Debt Restructurings Subsequent Default (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)loan	Jun. 30, 2018USD ($)loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	30	32
Recorded Investment | $	$ 3,290	$ 3,628
Total commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	3
Recorded Investment | $	$ 0	$ 0
Residential mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	16	8
Recorded Investment | $	$ 2,813	$ 2,219
Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	14	21
Recorded Investment | $	$ 477	$ 1,409

Loans, Changes in the Allowance

Loans, Changes in the Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands		6 Months Ended	12 Months Ended
		Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2019		Dec. 31, 2018
Changes in the allowance for loan losses by portfolio segment
Balance at beginning of period		$ 238,023	$ 265,880
Charge offs		(31,247)	(50,536)
Recoveries		10,384	20,179
Net Charge offs		(20,864)	(30,358)
Provision for loan losses		16,500	2,500
Balance at end of period		233,659	238,023
Allowance for loan losses:
Individually evaluated				$ 32,188		$ 15,304
Collectively evaluated				201,470		222,719
Total allowance for loan losses		238,023	238,023	233,659		238,023
Loans:
Individually evaluated				172,489		133,690
Collectively evaluated				23,075,334		22,801,887
Acquired and accounted for under ASC 310-30				2,145	[1]	4,853
Total loans	[2]			23,249,967		22,940,429
Commercial and industrial
Changes in the allowance for loan losses by portfolio segment
Balance at beginning of period		108,835	123,068
Charge offs		(26,255)	(30,837)
Recoveries		6,650	13,714
Net Charge offs		(19,605)	(17,123)
Provision for loan losses		23,970	2,890
Balance at end of period		113,199	108,835
Allowance for loan losses:
Individually evaluated				22,890		5,721
Collectively evaluated				90,309		103,114
Total allowance for loan losses		113,199	123,068	113,199		108,835
Loans:
Individually evaluated				100,066		63,153
Collectively evaluated				7,478,790		7,331,898
Acquired and accounted for under ASC 310-30				528	[1]	2,994
Total loans				7,579,384		7,398,044
Commercial real estate — owner occupied
Changes in the allowance for loan losses by portfolio segment
Balance at beginning of period		9,255	10,352
Charge offs		(222)	(1,363)
Recoveries		1,312	639
Net Charge offs		1,089	(724)
Provision for loan losses		(1,110)	(373)
Balance at end of period		9,235	9,255
Allowance for loan losses:
Individually evaluated				27		24
Collectively evaluated				9,207		9,231
Total allowance for loan losses		9,235	10,352	9,235		9,255
Loans:
Individually evaluated				2,473		5,852
Collectively evaluated				939,647		913,708
Acquired and accounted for under ASC 310-30				691	[1]	883
Total loans				942,811		920,443
Commercial real estate — investor
Changes in the allowance for loan losses by portfolio segment
Balance at beginning of period		40,844	41,059
Charge offs		0	(7,914)
Recoveries		34	668
Net Charge offs		34	(7,246)
Provision for loan losses		10	7,031
Balance at end of period		40,888	40,844
Allowance for loan losses:
Individually evaluated				103		28
Collectively evaluated				40,785		40,816
Total allowance for loan losses		40,888	41,059	40,888		40,844
Loans:
Individually evaluated				1,411		2,384
Collectively evaluated				3,777,511		3,748,883
Acquired and accounted for under ASC 310-30				279	[1]	287
Total loans				3,779,201		3,751,554
Real estate construction
Changes in the allowance for loan losses by portfolio segment
Balance at beginning of period		28,240	34,370
Charge offs		(60)	(298)
Recoveries		211	446
Net Charge offs		151	149
Provision for loan losses		(1,267)	(6,279)
Balance at end of period		27,124	28,240
Allowance for loan losses:
Individually evaluated				56		75
Collectively evaluated				27,068		28,165
Total allowance for loan losses		28,240	28,240	27,124		28,240
Loans:
Individually evaluated				417		510
Collectively evaluated				1,394,384		1,334,500
Acquired and accounted for under ASC 310-30				14	[1]	21
Total loans				1,394,815		1,335,031
Residential mortgage
Changes in the allowance for loan losses by portfolio segment
Balance at beginning of period		25,595	29,607
Charge offs		(1,260)	(1,627)
Recoveries		438	1,271
Net Charge offs		(822)	(355)
Provision for loan losses		(3,421)	(3,657)
Balance at end of period		21,352	25,595
Allowance for loan losses:
Individually evaluated				5,693		6,023
Collectively evaluated				15,659		19,572
Total allowance for loan losses		25,595	25,595	21,352		25,595
Loans:
Individually evaluated				56,272		50,486
Collectively evaluated				8,220,602		8,226,642
Acquired and accounted for under ASC 310-30				605	[1]	584
Total loans				8,277,479		8,277,712
Home equity
Changes in the allowance for loan losses by portfolio segment
Balance at beginning of period		19,266	22,126
Charge offs		(725)	(3,236)
Recoveries		1,273	2,628
Net Charge offs		548	(608)
Provision for loan losses		(4,241)	(2,252)
Balance at end of period		15,573	19,266
Allowance for loan losses:
Individually evaluated				3,233		3,312
Collectively evaluated				12,340		15,954
Total allowance for loan losses		19,266	19,266	15,573		19,266
Loans:
Individually evaluated				10,626		10,124
Collectively evaluated				905,560		884,266
Acquired and accounted for under ASC 310-30				27	[1]	83
Total loans				916,213		894,473
Other consumer
Changes in the allowance for loan losses by portfolio segment
Balance at beginning of period		5,988	5,298
Charge offs		(2,726)	(5,261)
Recoveries		467	812
Net Charge offs		(2,259)	(4,448)
Provision for loan losses		2,558	5,138
Balance at end of period		6,287	5,988
Allowance for loan losses:
Individually evaluated				185		121
Collectively evaluated				6,102		5,867
Total allowance for loan losses		$ 6,287	$ 5,298	6,287		5,988
Loans:
Individually evaluated				1,225		1,181
Collectively evaluated				358,841		361,990
Acquired and accounted for under ASC 310-30				0	[1]	0
Total loans				$ 360,065		$ 363,171
[1]	(a) Loans acquired in business combinations and accounted for under ASC Subtopic 310-30 "Receivables — Loans and Debt Securities Acquired with Deteriorated Credit Quality."
[2]	(a) Includes $2 million and $5 million of purchased credit-impaired loans at June 30, 2019 and December 31, 2018 , respectively.

Loans Loans Changes in the Allo

Loans Loans Changes in the Allowance for Loan Losses by Oil and Gas Segment (Details) - USD ($) $ in Thousands		6 Months Ended	12 Months Ended
		Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period		$ 238,023	$ 265,880
Charge offs		(31,247)	(50,536)
Recoveries		10,384	20,179
Net Charge offs		(20,864)	(30,358)
Provision for loan losses		16,500	2,500
Balance at end of period		233,659	238,023
Allowance for loan losses
Individually evaluated for impairment				$ 32,188	$ 15,304
Collectively evaluated for impairment				201,470	222,719
Total allowance for loan losses		238,023	238,023	233,659	238,023
Loans
Individually evaluated for impairment				172,489	133,690
Collectively evaluated for impairment				23,075,334	22,801,887
Total loans	[1]			23,249,967	22,940,429
Oil and Gas
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period		12,000	27,000
Charge offs		(17,000)	(24,000)
Recoveries		4,000	6,000
Net Charge offs		(13,000)	(17,000)
Provision for loan losses		26,000	2,000
Balance at end of period		25,000	12,000
Allowance for loan losses
Individually evaluated for impairment				16,000	0
Collectively evaluated for impairment				9,000	12,000
Total allowance for loan losses		$ 25,000	$ 27,000	25,000	12,000
Loans
Individually evaluated for impairment				63,000	22,000
Collectively evaluated for impairment				594,000	725,000
Total loans				$ 657,000	$ 747,000
[1]	(a) Includes $2 million and $5 million of purchased credit-impaired loans at June 30, 2019 and December 31, 2018 , respectively.

Loans, Changes in the Allowan_2

Loans, Changes in the Allowance for Loan Losses (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Change in the allowance for unfunded commitments
Balance at beginning of period	$ 24,000
Balance at end of period	22,000	$ 24,000
Allowance for Unfunded Commitments:
Change in the allowance for unfunded commitments
Balance at beginning of period	24,336	24,400
Provision for unfunded commitments	(2,500)	(2,500)
Amount recorded at acquisition	70	2,436
Balance at end of period	$ 21,907	$ 24,336

Loans Changes to Accretable Yie

Loans Changes to Accretable Yield (Details) - USD ($) $ in Thousands		6 Months Ended	12 Months Ended
		Jun. 30, 2019	Dec. 31, 2018
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period		$ 1,482	$ 0
Purchases		0	4,853
Accretion		(812)	(4,954)
Net reclassification from non-accretable yield		23	1,605
Other	[1]	0	(22)
Balance at end of period		$ 694	$ 1,482
[1]	(a) Primarily includes charge-offs which are accounted for under ASC Subtopic 310-30 "Receivables — Loans and Debt Securities Acquired with Deteriorated Credit Quality."

Loans Narrative (Details)

Loans Narrative (Details) - USD ($) $ in Thousands		6 Months Ended		12 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
Receivables [Abstract]
Recorded Investment, loans modified in troubled debt restructuring	[1]	$ 6,370	$ 4,035
Restructured Loans Subsequently Accruing		1,000
Ytd Restructured Loans Still On Nonaccrual		5,000
Net unaccreted purchase discount		17,000		$ 20,000
Unaccreted purchase discount, performing loans		16,000		18,000
Unaccreted purchase discount, nonperforming loans		1,000		2,000
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for loan losses		233,659		238,023	$ 265,880
Bank Mutual
Financing Receivable, Allowance for Credit Loss [Line Items]
Purchased credit-impaired loans		2,000		5,000
Huntington National Bank
Financing Receivable, Allowance for Credit Loss [Line Items]
Purchased credit-impaired loans		0
Oil and Gas
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for loan losses		$ 25,000		$ 12,000	$ 27,000
Percent of Loans		3.80%		1.60%
[1]	(a) Represents post-modification outstanding recorded investment.

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets, Summary of Core Deposit and Other Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Summary of core deposit intangibles and other intangibles
Amortization of other intangible assets	$ 2,324	$ 2,168	$ 4,551	$ 3,693
Core Deposit Intangibles
Summary of core deposit intangibles and other intangibles
Gross carrying amount	80,730		80,730		$ 58,100
Accumulated amortization	(8,419)		(8,419)		(5,326)
Net Book Value	72,310		72,310		52,774
Amortization of other intangible assets			3,094		5,326
Additions to Core Deposits
Summary of core deposit intangibles and other intangibles
Additions during the period			22,630		58,100
Other Intangibles
Summary of core deposit intangibles and other intangibles
Gross carrying amount	44,887		44,887		44,931
Reductions due to sale			0		(43)
Accumulated amortization	(23,282)		(23,282)		(21,825)
Net Book Value	$ 21,605		21,605		23,062
Additions during the period			0		10,359
Amortization of other intangible assets			$ 1,457		$ 2,833

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets, Mortgage Servicing Rights Roll-Forward (Details) - USD ($) $ in Thousands		6 Months Ended	12 Months Ended
		Jun. 30, 2019	Dec. 31, 2018
Mortgage servicing rights:
Mortgage servicing rights at beginning of period		$ 68,433	$ 59,168
MSR Addition from Business Combination		0	8,136
Additions		3,575	10,722
Amortization		(5,448)	(9,594)
Mortgage servicing rights at end of period		66,560	68,433
Valuation Allowance for Impairment of Recognized Servicing Assets [Roll Forward]
Valuation allowance at beginning of period		(239)	(784)
(Additions) recoveries, net		(146)	545
Valuation allowance at end of period		(385)	(239)
Mortgage servicing rights, net		66,175	68,193
Fair value of mortgage servicing rights		69,839	81,012
Portfolio of residential mortgage loans serviced for others (“servicing portfolio”)		$ 8,503,844	$ 8,600,983
Mortgage servicing rights, net to servicing portfolio		0.78%	0.79%
Mortgage servicing rights expense	[1]	$ 5,593	$ 9,049
[1]	(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 in the consolidated statements of income.

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets, Estimated Future Amortization Expense (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Core Deposit Intangibles
Estimated future amortization expense
Six Months Ending December 31, 2019	$ 4,036
Year ending December 31, 2020	8,073
Year ending December 31, 2021	8,073
Year ending December 31, 2022	8,073
Year ending December 31, 2023	8,073
Year ending December 31, 2024	8,073
Beyond 2024	27,909
Net Book Value	72,310	$ 52,774
Other Intangibles
Estimated future amortization expense
Six Months Ending December 31, 2019	1,367
Year ending December 31, 2020	2,707
Year ending December 31, 2021	2,682
Year ending December 31, 2022	2,659
Year ending December 31, 2023	2,640
Year ending December 31, 2024	2,620
Beyond 2024	6,931
Net Book Value	21,605	$ 23,062
Mortgage Servicing Rights
Estimated future amortization expense
Six Months Ending December 31, 2019	5,157
Year ending December 31, 2020	11,191
Year ending December 31, 2021	9,387
Year ending December 31, 2022	7,835
Year ending December 31, 2023	6,529
Year ending December 31, 2024	5,443
Beyond 2024	21,018
Net Book Value	$ 66,560

Goodwill and Other Intangible_6

Goodwill and Other Intangible Assets (Details Textuals) - USD ($)	Jun. 14, 2019	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill, Impairment Loss		$ 0	$ 0
Goodwill		$ 1,176,019,000		$ 1,169,023,000
Huntington National Bank
Business Acquisition [Line Items]
Goodwill acquired	$ 7,000,000

Short and Long-Term Funding (Co

Short and Long-Term Funding (Components of Short-term and Long-term Funding) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Short-term Funding [Abstract]
Federal funds purchased	$ 7,010	$ 19,710
Securities sold under agreements to repurchase	76,185	91,941
Federal funds purchased and securities sold under agreements to repurchase	83,195	111,651
Commercial paper	28,787	45,423
Total short-term funding	111,983	157,074
Long-Term Funding
Corporation subordinated notes, at par, due 2025	250,000	250,000
Other long-term funding and capitalized costs	(3,597)	(4,389)
Total long-term funding	796,403	795,611
Long-term Funding
Total short and long-term funding, excluding FHLB advances	908,386	952,685
FHLB Advances
Short-term FHLB advances	80,000	900,000
Long-term FHLB advances	2,662,941	2,674,371
Total FHLB advances	2,742,941	3,574,371
Total short and long-term funding, excluding FHLB advances	3,651,327	4,527,056
Corporation senior notes [Member]
Long-Term Funding
Senior notes, at par	250,000	250,000
Bank senior notes [Member]
Long-Term Funding
Senior notes, at par	$ 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	Jun. 30, 2019	Dec. 31, 2018
RemainingContractualMaturityoftheSecuritiesSoldUnderAgreementtoRepurchase [Line Items]
Repurchase agreements	$ 76,185	$ 91,941
Overnight and Continuous
RemainingContractualMaturityoftheSecuritiesSoldUnderAgreementtoRepurchase [Line Items]
Repurchase agreements	76,185	91,941
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	76,185	91,941
Agency mortgage-related securities | Overnight and Continuous
RemainingContractualMaturityoftheSecuritiesSoldUnderAgreementtoRepurchase [Line Items]
Repurchase agreements	76,185	91,941
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 FHL

Short and Long-Term Funding FHLB Maturity Schedule (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
FHLB_Maturity_ [Line Items]
FHLB advances	$ 2,742,941	$ 3,574,371
FHLB Weighted Average Coupon Rate	2.31%	2.19%
FHLB Maturity within One Year [Domain]
FHLB_Maturity_ [Line Items]
FHLB advances	$ 2,441,050	$ 2,262,584
FHLB Weighted Average Coupon Rate	2.27%	2.06%
FHLB Maturity One Year to Two Years [Domain]
FHLB_Maturity_ [Line Items]
FHLB advances	$ 288,248	$ 1,285,039
FHLB Weighted Average Coupon Rate	2.57%	2.39%
FHLB Maturity Over Two Years to Three Years [Domain]
FHLB_Maturity_ [Line Items]
FHLB advances	$ 4,811	$ 14,393
FHLB Weighted Average Coupon Rate	5.21%	2.98%
FHLB Maturity Over Three Years [Domain]
FHLB_Maturity_ [Line Items]
FHLB advances	$ 8,833	$ 12,354
FHLB Weighted Average Coupon Rate	3.36%	4.55%

Short and Long-Term Funding (Lo

Short and Long-Term Funding (Long-term Funding Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended	6 Months Ended
	Nov. 30, 2014	Jun. 30, 2019	Dec. 31, 2018	Aug. 31, 2018
Long-Term Funding
FHLB advances		$ 2,742,941	$ 3,574,371
Subordinated Borrowing [Line Items]
Carrying Value of Securities Purchased under Agreements to Resell and Deposits Paid for Securities Borrowed		143,000
Two Thousand Fourteen Subordinated Notes
Subordinated Borrowing [Line Items]
Junior Subordinated Debentures Issued	$ 250,000
Debt Instrument, Term	10 years
Subordinated Borrowing, Interest Rate	4.25%
Two Thousand Eighteen Senior Notes [Member] [Domain]
Long-Term Funding
New Senior Debt Issued				$ 300,000
Debt Instrument, Interest Rate, Stated Percentage				3.50%
Two Thousand Fourteen Senior Notes [Member]
Long-Term Funding
New Senior Debt Issued	$ 250,000
Debt Instrument, Interest Rate, Stated Percentage	2.75%
FHLBDecreaseinAdvances [Domain]
Long-Term Funding
FHLB advances		831,000
FLHB Advances, Putable [Domain]
Long-Term Funding
FHLB advances		$ 2,600,000
FHLB Short Term Advances [Member]
Long-Term Funding
FHLB Put Contractual Maturity Weighted Average Life1		7 months 2 days
FHLB Long Term Advances [Member]
Long-Term Funding
FHLB Put Contractual Maturity Weighted Average Life1		5 years 8 months 8 days

Derivative and Hedging Activi_3

Derivative and Hedging Activities, Derivative Instruments Not Designated as Hedging Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Not Designated as Hedging Instrument | Other Assets [Member] | Interest rate-related instruments — customer and mirror
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	$ 2,761,552	$ 2,707,204
Derivative, Fair Value, Net	77,264	52,796
Not Designated as Hedging Instrument | Other Assets [Member] | Foreign currency exchange forwards
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	166,935	117,879
Derivative, Fair Value, Net	2,683	721
Not Designated as Hedging Instrument | Other Assets [Member] | Commodity contracts
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	258,928	331,727
Derivative, Fair Value, Net	22,498	35,426
Not Designated as Hedging Instrument | Other Assets [Member] | Interest rate lock commitments (mortgage)
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	396,130	191,222
Derivative, Fair Value, Net	4,869	2,208
Not Designated as Hedging Instrument | Other Assets [Member] | Purchased options (time deposit)
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	4,814	11,185
Derivative, Fair Value, Net	126	109
Not Designated as Hedging Instrument | Other liabilities | Interest rate-related instruments — customer and mirror
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	2,761,552	2,707,204
Derivative, Fair Value, Net	(15,013)	(52,653)
Not Designated as Hedging Instrument | Other liabilities | Foreign currency exchange forwards
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	159,340	69,153
Derivative, Fair Value, Net	(2,425)	(675)
Not Designated as Hedging Instrument | Other liabilities | Commodity contracts
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	258,485	315,861
Derivative, Fair Value, Net	(22,076)	(34,340)
Not Designated as Hedging Instrument | Other liabilities | Forward commitments (mortgage)
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	333,060	139,984
Derivative, Fair Value, Net	(1,903)	(2,072)
Not Designated as Hedging Instrument | Other liabilities | Written options (time deposit)
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	4,814	11,185
Derivative, Fair Value, Net	(126)	(109)
Designated as Hedging Instrument | Other liabilities | interest rate product [Member]
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	500,000	500,000
Derivative, Fair Value, Net	$ 69	$ (40)

Derivative and Hedging Activi_4

Derivative and Hedging Activities Cumulative Basis Adjustment for Fair Value Hedges (Details) - Designated as Hedging Instrument $ in Thousands	Jun. 30, 2019USD ($)
Balance Sheet Recording of Fair Value Hedge [Line Items]
Carrying Amount of the Hedged Assets/(Liabilities)	$ 500,000
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities)	6,000
Amortized cost basis of hedged asset	994,000
Carrying Value [Member]
Balance Sheet Recording of Fair Value Hedge [Line Items]
Carrying Amount of the Hedged Assets/(Liabilities)	505,659	[1]
adjustment [Member]
Balance Sheet Recording of Fair Value Hedge [Line Items]
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities)	$ 5,659	[1]
[1]	(a) These amounts include the amortized cost basis of closed portfolios used to designated hedging relationships in which the hedged item is the last layer expected to be remaining at the end of the hedging relationship. At June 30, 2019 , the amortized cost basis of the closed portfolios used in these hedging relationships was $994 million ; the positive cumulative basis adjustments associated with these hedging relationships was $6 million; and the amounts of the designated hedged items were $500 million .

Derivative and Hedging Activi_5

Derivative and Hedging Activities Income impact of Fair Value and Cash Flow Hedge (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Interest Income [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge		$ 53	$ 5	$ 219	$ (13)
Other Operating Income (Expense) [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge		0	0	0	0
Not Designated as Hedging Instrument, Economic Hedge [Member] | Interest Income [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge		4,165	(2,133)	6,222	(2,409)
Not Designated as Hedging Instrument, Economic Hedge [Member] | Other Operating Income (Expense) [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge		0	0	0	0
Designated as Hedging Instrument | Interest Income [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	[1]	(4,112)	2,138	(6,003)	2,396
Designated as Hedging Instrument | Other Operating Income (Expense) [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	[1]	$ 0	$ 0	$ 0	$ 0
[1]	(a) Includes net settlements on the derivatives.

Derivative and Hedging Activi_6

Derivative and Hedging Activities Derivative Impact on Perfomance (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Capital Market Fees [Member] | Interest Rate Related Instruments Customer and Mirror [Member]
Derivative Impact on Performance [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ (1,018)	$ (384)	$ (1,690)	$ 108
Capital Market Fees [Member] | Foreign Exchange Forward [Member]
Derivative Impact on Performance [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	186	98	212	70
Capital Market Fees [Member] | Commodity Contract [Member]
Derivative Impact on Performance [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	(97)	(1,050)	(664)	(886)
Mortgage Banking [Member] | Interest Rate Lock Commitments [Member]
Derivative Impact on Performance [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	1,837	255	2,661	1,749
Mortgage Banking [Member] | Forward Contracts [Member]
Derivative Impact on Performance [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ (78)	$ (616)	$ 169	$ (606)

Derivative and Hedging Activi_7

Derivative and Hedging Activities (Details Textuals) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Investment securities and cash equivalents pledged as collateral	$ 43	$ 36
Derivative collateral right to reclaim cash	$ 11	$ 1

Balance Sheet Offsetting (Detai

Balance Sheet Offsetting (Details) - Interest Rate Contract - USD ($) $ in Thousands		Jun. 30, 2019	Dec. 31, 2018
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	[1]	$ 17,504	$ 65,596
Gross amounts offset in the balance sheet	[1]	0	0
Net amounts presented in the balance sheet	[1]	17,504	65,596
Derivative liability available for offset	[1]	(6,693)	(22,873)
Collateral	[1]	(8,339)	(41,879)
Net amount	[1]	2,472	843
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	[1]	17,045	22,951
Gross amounts offset in the balance sheet	[1]	0	0
Net amounts presented in the balance sheet	[1]	17,045	22,951
Derivative asset available for offset	[1]	(6,693)	(22,873)
Collateral	[1]	(10,179)	(63)
Net amount	[1]	$ 174	$ 16
[1]	(a) Includes interest, commodity, and foreign exchange agreements

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		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Schedule of lending-related and other commitments [Line Items]
Expense Related to Qualified Affordable Housing Projects		$ 5,000	$ 5,000	$ 10,000	$ 9,000
Lending related commitments, fair value		0		0		$ 0
Commitments to extend credit, excluding commitments to originate residential mortgage loans held for sale
Summary of lending-related and other commitments
Lending related commitments	[1],[2]	8,902,027		8,902,027		8,720,293
Commercial Letters Of Credit
Summary of lending-related and other commitments
Lending related commitments	[1]	6,951		6,951		7,599
Standby Letters of Credit
Summary of lending-related and other commitments
Lending related commitments	[3]	264,541		264,541		255,904
Standby letters of credit, fair value		$ 3,000		$ 3,000		$ 2,000
[1]	(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 is not material at June 30, 2019 or December 31, 2018 .
[2]	(b) Interest rate lock commitments to originate residential mortgage loans held for sale are considered derivative instruments and are disclosed in Note 10 .
[3]	(c) The Corporation has established a liability of $3 million and $2 million at June 30, 2019 and December 31, 2018 , respectively, as an estimate of the fair value of these financial instruments.

Commitments, Off-Balance Shee_4

Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters Residential Mortgage Repurchase Reserve (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Residential mortgage repurchase reserve
Balance at beginning of period	$ 24,000
Balance at end of period	22,000	$ 24,000
Mortgage Repurchase Reserve
Residential mortgage repurchase reserve
Balance at beginning of period	752	987
Repurchase provision expense	128	345
Adjustments to provision expense	0	(450)
Charge offs, net	(174)	(218)
Amount recorded at acquisition	0	88
Balance at end of period	$ 706	$ 752

Commitments, Off-Balance Shee_5

Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters (Details Textuals) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities (Textuals) [Line Items]
Unfunded Commitments	$ 22,000		$ 22,000		$ 24,000
Expense Related to Qualified Affordable Housing Projects	5,000	$ 5,000	10,000	$ 9,000
Remaining Investment in Qualified Affordable Housing Projects	187,000		187,000		132,000
Variable Interest Entity Reporting Entity Involvement Unfunded Obligation Amount	95,000		95,000		51,000
Loans Repurchased Under Make Whole Requests	771		$ 771		$ 2,000
Loans Sold To Outside Investors Loss ReimbursementSettlement Paid			negligible		negligible
Loans Sold To Outside Investors Original Amount	11,600,000		$ 11,600,000
Loans Sold To Outside Investors Remaining Outstanding Amount	7,300,000		7,300,000
Residential Mortgage Loans Sold With Recourse Risk	34,000		34,000		$ 47,000
Residential Mortgage Loans Sold With Credit Recourse Risk	51,000		51,000		57,000
LendingRelatedCommitments, FairValue	0		0		0
UnconsolidatedProjectsLowIncomeHousing [Member]
Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities (Textuals) [Line Items]
Other Investments	196,000		196,000		136,000
PrincipalInvestmentCommitment [Member]
Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities (Textuals) [Line Items]
Other Investments	26,000		26,000		25,000
Standby Letters of Credit
Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities (Textuals) [Line Items]
Lines of Credit, Fair Value Disclosure	$ 3,000		$ 3,000		$ 2,000

Fair Value Measurements, Assets

Fair Value Measurements, Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Assets, Fair Value Disclosure [Abstract]
Investment securities available for sale	$ 3,283,456	$ 3,946,941
Fair Value, Inputs, Level 1
Assets, Fair Value Disclosure [Abstract]
Investment securities available for sale	0	999
Fair Value, Inputs, Level 2
Assets, Fair Value Disclosure [Abstract]
Investment securities available for sale	3,283,456	3,945,943
Fair Value, Inputs, Level 3
Assets, Fair Value Disclosure [Abstract]
Trading assets	4,869	2,208
Liabilities, Fair Value Disclosure [Abstract]
Trading liabilities	1,903	2,072
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1 | US Treasury Securities
Assets, Fair Value Disclosure [Abstract]
Investment securities available for sale	0	999
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	1,621	1,568
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1 | Total investment securities available for sale
Assets, Fair Value Disclosure [Abstract]
Investment securities available for sale	0	999
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | GNMA
Assets, Fair Value Disclosure [Abstract]
Investment securities available for sale	1,331,633	2,128,531
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Private-label
Assets, Fair Value Disclosure [Abstract]
Investment securities available for sale	814	1,003
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | FFELP asset backed securities
Assets, Fair Value Disclosure [Abstract]
Investment securities available for sale	273,137	297,360
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 | Total investment securities available for sale
Assets, Fair Value Disclosure [Abstract]
Investment securities available for sale	3,283,456	3,945,943
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Residential Loans Held For Sale Member
Assets, Fair Value Disclosure [Abstract]
Trading assets	129,303	64,321
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Interest rate-related instruments — customer and mirror
Assets, Fair Value Disclosure [Abstract]
Trading assets	77,264	52,796
Liabilities, Fair Value Disclosure [Abstract]
Trading liabilities	15,013	52,653
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Foreign currency exchange forwards
Assets, Fair Value Disclosure [Abstract]
Trading assets	2,683	721
Liabilities, Fair Value Disclosure [Abstract]
Trading liabilities	2,425	675
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Commodity contracts
Assets, Fair Value Disclosure [Abstract]
Trading assets	22,498	35,426
Liabilities, Fair Value Disclosure [Abstract]
Trading liabilities	22,076	34,340
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Purchased options (time deposit)
Assets, Fair Value Disclosure [Abstract]
Trading assets	126	109
Liabilities, Fair Value Disclosure [Abstract]
Trading liabilities	126	109
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Interest rate lock commitments (mortgage)
Assets, Fair Value Disclosure [Abstract]
Trading assets	4,869	2,208
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Forward commitments (mortgage)
Liabilities, Fair Value Disclosure [Abstract]
Trading liabilities	1,903	2,072
Designated as Hedging Instrument
Assets, Fair Value Disclosure [Abstract]
Trading assets	500,000
Designated as Hedging Instrument | Fair Value, Inputs, Level 2
Assets, Fair Value Disclosure [Abstract]
Interest Rate Fair Value Hedge Asset at Fair Value	69	0
Liabilities, Fair Value Disclosure [Abstract]
Interest Rate Fair Value Hedge Liability at Fair Value	0	40
FNMA/FHLMC | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | FNMA / FHLMC
Assets, Fair Value Disclosure [Abstract]
Investment securities available for sale	183,722	295,252
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	21,102	0
GNMA | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Commercial mortgage-related securities
Assets, Fair Value Disclosure [Abstract]
Investment securities available for sale	$ 1,470,048	$ 1,220,797

Fair Value Measurements Financi

Fair Value Measurements Financial Instruments Classified Within Level 3 (Details) - Derivative Financial Instruments - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning Balance	$ 140	$ 1,225
Mortgage derivative loss	2,830	(1,085)
Ending Balance	$ 2,969	$ 140

Fair Value Measurements Equity

Fair Value Measurements Equity Securities Without Readily Determinable Fair Values (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Equity Securities Without Readily Determinable Fair Value Amount [Roll Forward]
Carrying value as of December 31, 2018	$ 0
Upward carrying value changes	13,444	$ 0
Carrying value as of June 30, 2019	13,000
Fair Value, Inputs, Level 3
Equity Securities Without Readily Determinable Fair Value Amount [Roll Forward]
Carrying value as of December 31, 2018	0
Upward carrying value changes	13,444
Carrying value as of June 30, 2019	13,444
Cumulative upward carrying value changes between January 1, 2018 and June 30, 2019	13,444
Cumulative downward carrying value changes/impairment between January 1, 2018 and June 30, 2019	$ 0

Fair Value Measurements, Asse_2

Fair Value Measurements, Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis (Details) - USD ($) $ in Thousands		6 Months Ended		12 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Assets and Liabilities Measured at Fair Value on a Non-recurring Basis
Mortgage servicing rights		$ 69,839		$ 81,012
Mortgage Servicing Rights (MSR) Impairment (Recovery)		(146)	$ 607
Equity Securities without Readily Determinable Fair Value, Amount		13,000		0
Equity Securities, FV-NI and without Readily Determinable Fair Value		15,066		1,568
Fair Value, Inputs, Level 3
Assets and Liabilities Measured at Fair Value on a Non-recurring Basis
Equity Securities without Readily Determinable Fair Value, Amount		13,444		0
Equity Securities, FV-NI and without Readily Determinable Fair Value		13,444		0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 2
Assets and Liabilities Measured at Fair Value on a Non-recurring Basis
Other Real Estate Owned Fair Value Disclosure	[1]	519		2,200
Foreclosure / OREO expense, net		(1,115)		(1,545)
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3
Assets and Liabilities Measured at Fair Value on a Non-recurring Basis
Impaired loans	[2]	74,931		26,191
Provision for Credit Losses, Impaired Loans	[3]	(42,735)		(14,521)
Mortgage servicing rights		69,839		81,012
Mortgage Servicing Rights (MSR) Impairment (Recovery)		$ (146)		$ (545)
[1]	(c) 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.
[2]	(a) Represents individually evaluated impaired loans, net of the related allowance for loan losses.
[3]	(b) Represents provision for credit losses on individually evaluated impaired loans.

Fair Value Measurements Fair Va

Fair Value Measurements Fair Value Unobservable Level 3 Measurements (Details) - Fair Value, Inputs, Level 3	6 Months Ended
	Jun. 30, 2019
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	11.00%
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Prepayment Speed	12.00%
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	34.00%

Fair Value Measurements, Fair V

Fair Value Measurements, Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Visa Restricted Stock Owned		77,000
Financial assets
Cash and due from banks		$ 382,985	$ 507,187
Interest-bearing deposits in other financial institutions		172,708	221,226
Federal funds sold and securities purchased under agreements to resell		1,385	148,285
Debt Securities, Held-to-maturity		2,806,064	2,740,511
Investment securities held to maturity, fair value		2,874,758	2,710,271
Investment securities available for sale		3,283,456	3,946,941
Equity securities with readily determinable fair values, Fair Value		2,000	2,000
Equity Securities without Readily Determinable Fair Value, Amount		13,000	0
Equity Securities, FV-NI and without Readily Determinable Fair Value		15,066	1,568
FHLB and Federal Reserve Bank stocks		202,758	250,534
Loans, net		23,016,308	22,702,406
Financial liabilities
Short-term funding		111,983	157,074
Other long-term funding		796,403	795,611
FHLB advances		2,742,941	3,574,371
Letters of Credit Outstanding, Amount		265,000	256,000
Fair Value, Inputs, Level 1
Financial assets
Cash and due from banks		382,985	507,187
Cash and due from banks, Fair Value		382,985	507,187
Interest-bearing deposits in other financial institutions		172,708	221,226
Interest-bearing deposits in other financial institutions, fair value		172,708	221,226
Federal funds sold and securities purchased under agreements to resell		1,385	148,285
Federal funds sold and securities purchased under agreements to resell, fair value		1,385	148,285
Debt Securities, Held-to-maturity		999	0
Investment securities held to maturity, fair value		1,019	0
Investment securities available for sale		0	999
Investment securities available for sale, fair value		0	999
Equity securities with readily determinable fair value, Carrying Amount		1,621	1,568
Equity securities with readily determinable fair values, Fair Value		1,621	1,568
Fair Value, Inputs, Level 2
Financial assets
Debt Securities, Held-to-maturity		2,805,066	2,740,511
Investment securities held to maturity, fair value		2,873,739	2,710,271
Investment securities available for sale		3,283,456	3,945,943
Investment securities available for sale, fair value		3,283,456	3,945,943
FHLB and Federal Reserve Bank stocks		202,758	250,534
FHLB and Federal Reserve Bank stocks, fair value		202,758	250,534
Residential Loans Receivable Held-for-sale, Net, Not Part of Disposal Group		129,303	64,321
Residential Held-for-sale, Fair Value Disclosure		129,303	64,321
Commercial loans held for sale		11,000	14,943
Commercial Loans Held-for-sale, Fair Value Disclosure		11,000	14,943
Bank and Corporate Owned Life Insurance		668,638	663,203
Bank owned life insurance, fair value		668,638	663,203
Financial liabilities
Brokered CDs and other time deposits	[1]	3,367,252	2,815,401
Brokered CDs and other time deposits, fair value	[1]	3,373,332	2,815,401
Short-term funding	[2]	111,983	157,074
Short-term funding, fair value	[2]	111,983	157,074
Other long-term funding		796,403	795,611
Long-term funding, fair value		840,323	826,612
FHLB advances		2,742,941	3,574,371
Advances, Fair Value Disclosure		2,781,103	3,565,572
Standby letters of credit	[3]	2,693	2,482
Standby letters of credit, fair value	[3]	2,693	2,482
Fair Value, Inputs, Level 3
Financial assets
Equity Securities without Readily Determinable Fair Value, Amount		13,444	0
Equity Securities, FV-NI and without Readily Determinable Fair Value		13,444	0
Loans, net		23,016,308	22,702,406
Loans, net, fair value		22,767,412	22,317,395
Derivatives (trading assets)		4,869	2,208
Derivatives (trading and other assets), fair value		4,869	2,208
Financial liabilities
Noninterest-bearing demand, savings, interest-bearing demand, and money market accounts		21,906,970	22,081,992
Noninterest-bearing demand, savings, interest-bearing demand, and money market deposits, fair value		21,906,970	22,081,992
Derivatives (trading liabilities)		1,903	2,072
Derivatives (trading and other liabilities), fair value		1,903	2,072
Other Assets [Member] | Fair Value, Inputs, Level 2
Financial assets
Derivatives (trading assets)		102,641	89,052
Derivatives (trading and other assets), fair value		102,641	89,052
Other Liabilities [Member] | Fair Value, Inputs, Level 2
Financial liabilities
Derivatives (trading liabilities)		39,641	87,817
Derivatives (trading and other liabilities), fair value		$ 39,641	$ 87,817
[1]	(a) When the estimated fair value is less than the carrying value, the carrying value is reported as the fair value.
[2]	(b) The carrying amount is a reasonable estimate of fair value for existing short-term funding.
[3]	(b) The carrying amount is a reasonable estimate of fair value for existing short-term funding. (c) The commitment on standby letters of credit was $265 million at June 30, 2019 and $256 million at December 31, 2018 . See Note 12 for additional information on the standby letters of credit and for information on the fair value of lending-related commitments.

Fair Value Measurements (Detail

Fair Value Measurements (Details Textuals)	6 Months Ended
	Jun. 30, 2019shares
Fair Value Measurements (Textuals) [Abstract]
Fair Value Inputs Closing Ratio	83.00%
Visa Restricted Stock Owned	77,000
Visa Class A Shares - Current Conversion from Class B	125,495

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		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
RAP
Net period benefit cost for the pension and postretirement plans
Service cost	$ 1,925	$ 1,893	$ 3,850	$ 3,785
Interest cost	2,413	1,660	4,825	3,320
Expected return on plan assets	(6,075)	(4,755)	(12,150)	(9,510)
Amortization of prior service cost	(19)	(19)	(38)	(38)
Amortization of actuarial loss	65	463	130	925
Total net pension and periodic benefit cost	(1,691)	(759)	(3,383)	(1,518)
Bank Mutual Pension Plan
Net period benefit cost for the pension and postretirement plans
Interest cost		650		1,083
Expected return on plan assets		(1,060)		(1,592)
Total net pension and periodic benefit cost		(410)		(509)
Postretirement Plan
Net period benefit cost for the pension and postretirement plans
Interest cost	26	27	52	53
Amortization of prior service cost	(19)	(19)	(38)	(38)
Amortization of actuarial loss	(1)	2	(2)	4
Total net pension and periodic benefit cost	$ 6	$ 10	$ 13	$ 19

Retirement Plans (Details Textu

Retirement Plans (Details Textuals) (Details) - USD ($) $ in Millions	Jun. 14, 2019	Jun. 30, 2019	Jun. 30, 2018
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer		$ 0
Bank Mutual Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer			$ 31
Huntington National Bank
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Effective Date of Acquisition	Jun. 14, 2019

Segment Reporting (Details)

Segment Reporting (Details) $ in Thousands		3 Months Ended				6 Months Ended
		Jun. 30, 2019USD ($)	Mar. 31, 2019USD ($)	Jun. 30, 2018USD ($)	Mar. 31, 2018USD ($)	Jun. 30, 2019USD ($)segment	Jun. 30, 2018USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments | segment						3
Segment Income Statement Data Abstract
Net interest income		$ 213,619		$ 226,362		$ 429,167	$ 436,233
Net intersegment interest income (expense)		0		0		0	0
Segment net interest income		213,619		226,362		429,167	436,233
Noninterest income		95,837		92,842		187,040	183,222
Total revenue		309,457		319,204		616,206	619,455
Credit provision		8,000		4,000		14,000	4,000
Noninterest Expense		197,779		211,258		389,450	424,223
Income (loss) before income taxes		103,678		103,947		212,756	191,232
Income tax expense (benefit)		19,017		14,754		41,409	32,583
Net income		84,661	$ 86,686	89,192	$ 69,456	171,347	158,648
Segment Balance Sheet Data
Allocated Goodwill - Segment						1,176,019	1,166,665
Operating Segments | Corporate and Commercial Specialty
Segment Income Statement Data Abstract
Net interest income		115,648		121,985		231,557	226,420
Net intersegment interest income (expense)		(20,061)		(14,656)		(42,683)	(23,133)
Segment net interest income		95,587		107,330		188,874	203,287
Noninterest income		14,318		14,194		25,763	26,876
Total revenue		109,904		121,524		214,637	230,163
Credit provision		13,317		11,126		26,802	21,723
Noninterest Expense		40,022		41,775		78,810	81,025
Income (loss) before income taxes		56,566		68,623		109,026	127,415
Income tax expense (benefit)		10,864		13,454		20,866	24,880
Net income		45,702		55,169		88,159	102,535
Segment Balance Sheet Data
Allocated Goodwill - Segment						525,798	523,284
Operating Segments | Community, Consumer, and Business
Segment Income Statement Data Abstract
Net interest income		84,874		90,418		172,946	176,813
Net intersegment interest income (expense)		25,586		24,202		49,028	41,350
Segment net interest income		110,461		114,620		221,974	218,163
Noninterest income		78,335		76,250		152,559	150,286
Total revenue		188,796		190,870		374,533	368,449
Credit provision		4,966		4,880		10,000	9,846
Noninterest Expense		138,415		138,553		269,405	265,700
Income (loss) before income taxes		45,415		47,437		95,128	92,904
Income tax expense (benefit)		9,540		9,962		19,983	19,510
Net income		35,874		37,475		75,145	73,394
Segment Balance Sheet Data
Allocated Goodwill - Segment						650,221	643,382
Operating Segments | Risk Management and Shared Services
Segment Income Statement Data Abstract
Net interest income		13,097		13,959		24,664	33,000
Net intersegment interest income (expense)		(5,525)		(9,546)		(6,345)	(18,217)
Segment net interest income		7,572		4,413		18,318	14,783
Noninterest income		3,185		2,399		8,718	6,059
Total revenue		10,757		6,812		27,036	20,842
Credit provision		(10,283)		(12,006)		(22,801)	(27,569)
Noninterest Expense	[1]	19,343		30,929		41,236	77,498
Income (loss) before income taxes		1,697		(12,111)		8,602	(29,087)
Income tax expense (benefit)		(1,387)		(8,661)		560	(11,806)
Net income		3,084		(3,450)		8,042	(17,280)
Segment Balance Sheet Data
Allocated Goodwill - Segment						0	0
Business Combination, Acquisition Related Costs	[2]	$ 3,734		$ 7,107		$ 4,366	$ 27,712
[1]	(a) For the three months ended June 30, 2019 and 2018 , the Risk Management and Shared Services segment includes approximately $4 million and $7 million , respectively, of acquisition related noninterest expense. For the six months ended June 30, 2019 and 2018 , the Risk Management and Shared Services segment includes approximately $4 million and $28 million , respectively, of acquisition related noninterest expense.
[2]	Includes Bank Mutual and Huntington branch acquisition related costs only.

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance		$ (124,972)			$ (124,972)
Debt Securities, Available-for-sale, Realized Loss					(13,636)	$ (2,015)
Personnel expense	$ (123,228)		$ (123,980)		(243,279)	(241,665)
Change in Equity Securities(2016-01)				$ 84
Interest income (amortization of net unrealized losses (gains) on available for sale securities transferred to held to maturity securities)	(218)		335		(288)	632
Total other comprehensive income (loss)	44,311	21,597	(12,215)	(31,177)	65,909	(57,130)
Ending Balance	(59,063)				(59,063)
Investment Securities Available For Sale
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(54,065)	(75,643)	(78,453)	(38,453)	(75,643)	(38,453)
Other comprehensive income (loss) before reclassifications	59,476		(18,919)		89,966	(60,754)
Debt Securities, Available-for-sale, Realized Loss	(463)		2,015		(2,143)	2,015
Personnel expense	0		0		0	0
Other Expenses	0		0		0	0
Change in Equity Securities(2016-01)						(84)
Reporting Comprehensive Income(2018-02)						(8,419)
Interest income (amortization of net unrealized losses (gains) on available for sale securities transferred to held to maturity securities)	218		(335)		288	(632)
Income tax (expense) benefit	(14,940)		4,705		(22,242)	15,340
Total other comprehensive income (loss)	44,292		(12,533)		65,869	(52,533)
Ending Balance	(9,773)	(54,065)	(90,986)	(78,453)	(9,773)	(90,986)
Defined Benefit Pension and Post Retirement Obligations
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(49,310)	(49,330)	(29,220)	(24,305)	(49,330)	(24,305)
Other comprehensive income (loss) before reclassifications	0		0		0	0
Debt Securities, Available-for-sale, Realized Loss	0		0			0
Personnel expense	(38)		(38)		(75)	(76)
Other Expenses	64		465		128	929
Change in Equity Securities(2016-01)						0
Reporting Comprehensive Income(2018-02)						(5,235)
Interest income (amortization of net unrealized losses (gains) on available for sale securities transferred to held to maturity securities)	0		0		0	0
Income tax (expense) benefit	(7)		(109)		(13)	(216)
Total other comprehensive income (loss)	20		318		40	(4,597)
Ending Balance	(49,290)	(49,310)	(28,902)	(29,220)	(49,290)	(28,902)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(103,375)	(124,972)	(107,673)	(62,758)	(124,972)	(62,758)
Other comprehensive income (loss) before reclassifications	59,476		(18,919)		89,966	(60,754)
Debt Securities, Available-for-sale, Realized Loss	(463)		2,015		(2,143)	2,015
Personnel expense	(38)		(38)		(75)	(76)
Other Expenses	64		465		128	929
Change in Equity Securities(2016-01)				0		(84)
Reporting Comprehensive Income(2018-02)						(13,654)
Interest income (amortization of net unrealized losses (gains) on available for sale securities transferred to held to maturity securities)	218		(335)		288	(632)
Income tax (expense) benefit	(14,947)		4,596		(22,255)	15,124
Total other comprehensive income (loss)	44,311	21,597	(12,215)	(31,177)	65,909	(57,130)
Ending Balance	$ (59,063)	$ (103,375)	$ (119,888)	$ (107,673)	$ (59,063)	$ (119,888)

Revenue from Contracts with C_3

Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606		$ 71,122	$ 72,825	$ 143,660	$ 145,553
Other revenue		24,715	20,017	43,380	37,670
Total noninterest income		95,837	92,842	187,040	183,222
Insurance commissions and fees
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606		22,985	23,996	48,449	46,644
Wealth management fees
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606	[1]	20,691	20,333	40,870	40,975
Service charges and deposit account fees
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606		15,426	16,390	30,542	32,810
Card-based fees(a)
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606	[2]	10,177	10,155	19,472	19,628
Other revenue
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606		1,843	1,952	4,327	5,496
Corporate and Commercial Specialty
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606		2,517	3,320	5,964	8,515
Other revenue		11,801	10,874	19,799	18,361
Corporate and Commercial Specialty | Insurance commissions and fees
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606		0	0	0	0
Corporate and Commercial Specialty | Wealth management fees
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606		0	0	0	0
Corporate and Commercial Specialty | Service charges and deposit account fees
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606		3,195	3,786	6,583	8,011
Corporate and Commercial Specialty | Card-based fees(a)
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606	[2]	338	347	666	661
Corporate and Commercial Specialty | Other revenue
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606		(1,016)	(813)	(1,284)	(157)
Community, Consumer, and Business
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606		68,421	69,349	137,320	136,547
Other revenue		9,914	6,901	15,239	13,739
Community, Consumer, and Business | Insurance commissions and fees
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606		22,982	23,988	48,442	46,612
Community, Consumer, and Business | Wealth management fees
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606		20,691	20,307	40,870	40,708
Community, Consumer, and Business | Service charges and deposit account fees
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606		12,218	12,590	23,926	24,773
Community, Consumer, and Business | Card-based fees(a)
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606	[2]	9,791	9,806	18,709	18,960
Community, Consumer, and Business | Other revenue
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606		2,740	2,657	5,372	5,493
Risk Management and Shared Services
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606		184	156	375	490
Other revenue		3,000	2,242	8,343	5,570
Risk Management and Shared Services | Insurance commissions and fees
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606		3	7	7	32
Risk Management and Shared Services | Wealth management fees
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606		0	26	0	267
Risk Management and Shared Services | Service charges and deposit account fees
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606		14	13	32	25
Risk Management and Shared Services | Card-based fees(a)
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606	[2]	48	3	97	6
Risk Management and Shared Services | Other revenue
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606		119	108	239	160
Operating Segments [Member] | Corporate and Commercial Specialty
Disaggregation of Revenue [Line Items]
Total noninterest income		14,318	14,194	25,763	26,876
Operating Segments [Member] | Community, Consumer, and Business
Disaggregation of Revenue [Line Items]
Total noninterest income		78,335	76,250	152,559	150,286
Operating Segments [Member] | Risk Management and Shared Services
Disaggregation of Revenue [Line Items]
Total noninterest income		$ 3,185	$ 2,399	$ 8,718	$ 6,059
[1]	Includes trust, asset management, brokerage, and annuity fees.
[2]	(a) Certain card-based fees are out-of-scope of Topic 606.

Leases Lease, Cost and Cash Flo

Leases Lease, Cost and Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Leases [Abstract]
Operating Lease, Cost	$ 2,888	$ 5,793
Operating Lease, Payments	$ 2,762	$ 5,570

Leases Components of Lease Expe

Leases Components of Lease Expense (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019
Leases [Abstract]
Operating lease right-of-use asset	$ 48,114	$ 52,000
Finance lease right-of-use asset	0
Operating lease liability	52,259	$ 56,000
Finance lease liability	$ 0

Leases Operating Lease Informat

Leases Operating Lease Information (Details) $ in Thousands	Jun. 30, 2019USD ($)
Lessee, Lease, Description [Line Items]
Lease payments	$ 60,501
Weighted-average lease term (in years)	7 years 2 months 4 days
Weighted-average discount rate	3.41%
Equipment
Lessee, Lease, Description [Line Items]
Lease payments	$ 256
Weighted-average lease term (in years)	1 year 1 month 6 days
Weighted-average discount rate	2.73%
Retail and corporate offices
Lessee, Lease, Description [Line Items]
Lease payments	$ 50,644
Weighted-average lease term (in years)	6 years 4 months 9 days
Weighted-average discount rate	3.42%
Land
Lessee, Lease, Description [Line Items]
Lease payments	$ 9,602
Weighted-average lease term (in years)	12 years 1 month 20 days
Weighted-average discount rate	3.40%

Leases Amortization of Operatin

Leases Amortization of Operating Lease Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019
Leases [Abstract]
Six Months Ending December 31, 2019	$ 6,447
2020	10,665
2021	9,942
2022	7,519
2023	5,379
Beyond 2023	20,550
Total lease payments	60,501
Less: interest	8,242
Present value of lease payments	$ 52,259	$ 56,000

Leases (Details Textuals)

Leases (Details Textuals) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019USD ($)	Jun. 30, 2019USD ($)
Lessee, Lease, Description [Line Items]
Operating Lease, Cost	$ 2,888	$ 5,793
Operating Lease, Payments	2,762	5,570
Additional operating leases	$ 16,000	$ 16,000
Minimum
Lessee, Lease, Description [Line Items]
Operating lease terms	1 year	1 year
Additional operating lease terms	3 years	3 years
Maximum
Lessee, Lease, Description [Line Items]
Operating lease terms	43 years	43 years
Additional operating lease terms	6 years	6 years