Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Interest income:
Loans, including fees	$ 154,113	$ 146,967
Loans held for sale	159	96
Securities-taxable	23,957	20,790
Securities-tax exempt	1,802	880
Short-term investments	610	354
Total interest income	180,641	169,087
Interest expense:
Deposits	11,733	7,126
Short-term borrowings	993	172
Long-term debt	5,079	3,631
Total interest expense	17,805	10,929
Net interest income	162,836	158,158
Provision for loan losses	60,036	6,154
Net interest income after provision for loan losses	102,800	152,004
Noninterest income:
Service charges on deposit accounts	18,383	17,315
Trust fees	11,224	11,200
Bank card and ATM fees	11,348	11,183
Investment and annuity fees	4,933	5,050
Secondary mortgage market operations	2,912	2,664
Insurance commissions and fees	1,307	1,754
Amortization of FDIC loss share receivable	(1,613)	(1,197)
Other income	9,692	8,577
Total noninterest income	58,186	56,546
Noninterest expense:
Compensation expense	73,001	65,017
Employee benefits	15,714	15,634
Personnel expense	88,715	80,651
Net occupancy expense	10,356	11,177
Equipment expense	3,774	3,935
Data processing expense	14,207	13,556
Professional services expense	7,621	15,370
Amortization of intangibles	5,124	6,318
Telecommunications and postage	3,361	3,651
Deposit insurance and regulatory fees	5,397	3,595
Other real estate expense, net	768	456
Other expense	16,709	14,806
Total noninterest expense	156,032	153,515
Income before income taxes	4,954	55,035
Income taxes	1,115	14,876
Net income	$ 3,839	$ 40,159
Earnings per common share-basic	$ 0.05	$ 0.49
Earnings per common share-diluted	0.05	0.49
Dividends paid per share	$ 0.24	$ 0.24
Weighted average shares outstanding-basic	77,501	79,496
Weighted average shares outstanding-diluted	77,672	79,661