Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
INTEREST REVENUE:
Loans and leases	$ 107,805	$ 102,135
Deposits with other banks	263	236
Available-for-sale securities:
Taxable	5,888	6,844
Tax-exempt	3,032	3,377
Loans held for sale	984	905
Total interest revenue	117,972	113,497
Deposits:
Interest bearing demand	2,163	2,183
Savings	443	412
Other time	3,354	4,007
Federal funds purchased and securities sold under agreement to repurchase	140	82
Long-term debt	530	577
Junior subordinated debt	183	163
Total interest expense	6,813	7,424
Net interest revenue	111,159	106,073
Provision for credit losses	1,000	(5,000)
Net interest revenue, after provision for credit losses	110,159	111,073
NONINTEREST REVENUE:
Mortgage lending	2,618	8,567
Credit card, debit card and merchant fees	8,961	8,539
Deposit service charges	11,014	11,252
Security gains, net	2	14
Insurance commissions	33,249	33,493
Wealth management	5,109	6,210
Other	4,562	5,240
Total noninterest revenue	65,515	73,315
NONINTEREST EXPENSE:
Salaries and employee benefits	82,467	81,179
Occupancy, net of rental income	10,273	10,194
Equipment	3,765	3,974
Deposit insurance assessments	2,288	2,311
Regulatory settlement	10,277
Other	33,230	39,275
Total noninterest expense	142,300	136,933
Income before income taxes	33,374	47,455
Income tax expense	10,825	15,189
Net income	$ 22,549	$ 32,266
Earnings per share:
Basic (in dollars per share)	$ 0.24	$ 0.33
Diluted (in dollars per share)	0.24	0.33
Dividends declared per common share (in dollars per share)	$ 0.10	$ 0.075