Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
INTEREST INCOME
Interest and fees on loans	$ 167,350	$ 155,663	$ 490,065	$ 460,025
Interest and dividends on investment securities:
Taxable	22,948	24,937	72,734	73,897
Tax exempt	8,141	7,917	23,865	23,369
Other interest	1,064	1,489	3,449	4,952
Total interest income	199,503	190,006	590,113	562,243
INTEREST EXPENSE
Interest on deposits	13,118	8,521	36,562	24,281
Interest on Federal funds purchased and securities sold under agreements to repurchase	326	248	1,000	714
Interest on other short-term funding	296	83	1,656	279
Interest on long-term funding	7,229	10,645	23,657	32,159
Total interest expense	20,969	19,497	62,875	57,433
NET INTEREST INCOME	178,534	170,509	527,238	504,810
Provision for credit losses	21,000	8,000	55,000	17,500
Net interest income after provision for credit losses	157,534	162,509	472,238	487,310
NONINTEREST INCOME
Trust service fees	11,700	12,273	34,656	36,875
Service charges on deposit accounts	17,445	17,385	50,162	48,894
Card-based and other nondeposit fees	12,777	12,618	37,485	38,631
Insurance commissions	19,431	17,561	62,818	57,366
Brokerage and annuity commissions	4,155	3,809	12,047	11,684
Mortgage banking, net	18,291	6,643	26,562	23,992
Capital market fees, net	7,012	2,170	14,343	7,329
Bank owned life insurance income	3,290	2,448	11,033	7,704
Asset gains (losses), net	(1,034)	244	(853)	2,931
Investment securities gains, net	(13)	2,796	6,201	4,038
Other	2,180	2,118	6,140	6,916
Total noninterest income	95,234	80,065	260,594	246,360
NONINTEREST EXPENSE
Personnel expense	103,819	101,134	307,346	304,272
Occupancy	15,362	14,187	42,379	46,178
Equipment	5,319	6,003	16,161	17,514
Technology	14,173	14,748	42,887	46,660
Business development and advertising	5,251	5,964	20,053	18,120
Other intangible amortization	525	885	1,568	2,574
Loan expense	3,535	3,305	10,198	9,982
Legal and professional fees	4,804	4,207	14,685	13,089
Foreclosure / OREO expense	960	645	4,167	3,071
FDIC expense	9,000	6,000	25,500	18,500
Other	12,566	14,507	38,701	42,394
Total noninterest expense	175,314	171,585	523,645	522,354
Income before income taxes	77,454	70,989	209,187	211,316
Income tax expense	23,638	21,551	63,746	65,806
Net income	53,816	49,438	145,441	145,510
Preferred stock dividends	2,188	2,184	6,555	4,957
Net income available to common equity	$ 51,628	$ 47,254	$ 138,886	$ 140,553
Earnings per common share:
Basic (in usd per share)	$ 0.34	$ 0.31	$ 0.92	$ 0.93
Diluted (in usd per share)	$ 0.34	$ 0.31	$ 0.92	$ 0.92
Average common shares outstanding:
Basic (in shares)	148,708	148,614	148,607	149,524
Diluted (in shares)	149,973	149,799	149,645	150,704