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	$ 1.00	$ 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.