Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Interest Income
Interest and fees on loans		$ 258,853	$ 220,034
Interest and dividends on investment securities:
Taxable		29,053	30,104
Tax-exempt		13,816	9,217
Other interest		4,226	2,177
Total interest income		305,948	261,532
Interest Expense
Interest on deposits		62,773	33,412
Interest on Federal funds purchased and securities sold under agreements to repurchase		627	522
Interest on other short-term funding		51	60
Interest on FHLB advances		19,554	13,123
Interest on long-term funding		7,396	4,544
Total interest expense		90,401	51,661
Net interest income		215,547	209,871
Provision for credit losses		6,000	0
Net interest income after provision for credit losses		209,547	209,871
Noninterest Income
Noninterest Income In Scope of Topic 606		72,538	72,725
Capital markets, net		3,189	5,306
Mortgage banking, net		4,712	6,370
Bank and corporate owned life insurance		3,792	3,187
Asset gains (losses), net		567	(107)
Investment securities gains (losses), net		1,680	0
Other		3,260	2,492
Total noninterest income		91,202	90,380
Noninterest Expense
Personnel		120,050	117,685
Technology		19,012	17,715
Occupancy		16,472	15,357
Business development and advertising		6,636	6,693
Business development and advertising		5,668	5,556
Legal and professional		3,951	5,413
Card issuance costs		977	2,332
Loan costs		1,364	972
Foreclosure / OREO expense, net		567	723
FDIC assessment		3,750	8,250
Other intangible amortization		2,226	1,525
Other		10,366	10,140
Total noninterest expense		191,671	212,965
Income before income taxes		109,078	87,285
Income tax expense		22,392	17,829
Net income		86,686	69,456
Preferred stock dividends		3,801	2,339
Net income available to common equity		$ 82,885	$ 67,117
Earnings per common share:
Basic		$ 0.50	$ 0.41
Diluted		$ 0.50	$ 0.40
Average common shares outstanding:
Basic		163,928	163,520
Diluted		165,433	166,432
Insurance commissions and fees
Noninterest Income
Noninterest Income In Scope of Topic 606		$ 25,464	$ 22,648
Wealth management fees(a)
Noninterest Income
Noninterest Income In Scope of Topic 606	[1]	20,180	20,642
Service charges on deposit account fees
Noninterest Income
Noninterest Income In Scope of Topic 606		15,115	16,420
Card-based fees
Noninterest Income
Noninterest Income In Scope of Topic 606		9,295	9,472
Service charges and account fees		9,261	9,442
Other fee-based revenue
Noninterest Income
Noninterest Income In Scope of Topic 606		2,484	3,544
Service charges and account fees		3,983	3,980
Operating Segments [Member] | Risk Management and Shared Serivies [Member]
Interest Expense
Net interest income		11,567	19,041
Provision for credit losses		(12,518)	(15,563)
Noninterest Income
Total noninterest income		5,533	3,661
Noninterest Expense
Acquisition related costs(b)	[2]	632	20,605
Total noninterest expense		21,893	46,571
Income before income taxes		6,905	(16,977)
Income tax expense		1,947	(3,146)
Net income		$ 4,958	$ (13,831)

[1] Includes trust, asset management, brokerage, and annuity fees.

[2] Includes Huntington branch and Bank Mutual acquisition related costs only.