Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Interest Income
Interest and fees on loans	$ 196,972	$ 167,350	$ 554,867	$ 490,065
Interest and dividends on investment securities:
Taxable	24,162	22,948	71,295	72,734
Tax exempt	8,268	8,141	24,540	23,865
Other interest	2,492	1,064	5,581	3,449
Total interest income	231,894	199,503	656,283	590,113
Interest Expense
Interest on deposits	27,778	13,118	65,882	36,562
Interest on Federal funds purchased and securities sold under agreements to repurchase	768	326	2,107	1,000
Interest on other short-term funding	1,039	296	3,946	1,656
Interest on long-term funding	12,187	7,229	30,133	23,657
Total interest expense	41,772	20,969	102,068	62,875
NET INTEREST INCOME	190,122	178,534	554,215	527,238
Provision for credit losses	5,000	21,000	26,000	55,000
Net interest income after provision for credit losses	185,122	157,534	528,215	472,238
Noninterest Income
Trust service fees	12,785	11,700	37,066	34,656
Service charges on deposit accounts	16,268	17,445	48,654	50,162
Card-based and other nondeposit fees	12,619	12,777	38,848	37,485
Insurance commissions	19,815	19,431	62,288	62,818
Brokerage and annuity commissions	4,392	4,155	13,071	12,047
Mortgage banking, net	6,585	18,291	16,191	26,562
Capital market fees, net	4,610	7,012	12,535	14,343
Bank and Corporate Owned Life Insurance Income	6,580	3,290	13,094	11,033
Asset gains (losses), net	(16)	(1,034)	(716)	(853)
Investment securities gains (losses), net	3	(13)	359	6,201
Other	2,254	2,180	6,746	6,140
Total noninterest income	85,895	95,234	248,136	260,594
Noninterest Expense
Personnel expense	105,852	103,819	314,954	307,346
Occupancy	12,294	15,362	40,345	42,379
Equipment	5,232	5,319	15,951	16,161
Technology	15,233	14,173	45,126	42,887
Business development and advertising	7,764	5,251	20,751	20,053
Other intangible amortization	450	525	1,459	1,568
Loan expense	3,330	3,535	8,924	10,198
Legal and professional fees	6,248	4,804	16,125	14,685
Foreclosure / OREO expense, net	906	960	3,593	4,167
FDIC expense	7,800	9,000	23,800	25,500
Other	12,318	12,566	36,406	38,701
Total noninterest expense	177,427	175,314	527,434	523,645
Income before income taxes	93,590	77,454	248,917	209,187
Income tax expense	28,589	23,638	69,663	63,746
Net income	65,001	53,816	179,254	145,441
Preferred stock dividends	2,339	2,188	7,008	6,555
Net income available to common equity	$ 62,662	$ 51,628	$ 172,246	$ 138,886
Earnings per common share:
Basic (in usd per share)	$ 0.41	$ 0.34	$ 1.13	$ 0.92
Diluted (in usd per share)	$ 0.41	$ 0.34	$ 1.11	$ 0.92
Average common shares outstanding:
Basic (in shares)	150,565	148,708	150,983	148,607
Diluted (in shares)	152,968	149,973	153,782	149,645