Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
INTEREST REVENUE:
Loans and leases	$ 103,428	$ 99,962	$ 205,563	$ 198,706
Deposits with other banks	126	87	362	363
Available-for-sale securities:
Taxable	6,424	7,133	13,268	14,680
Tax-exempt	3,335	3,669	6,712	7,384
Loans held for sale	1,317	648	2,222	965
Total interest revenue	114,630	111,499	228,127	222,098
Deposits:
Interest bearing demand	2,262	1,905	4,445	3,825
Savings	426	402	838	793
Other time	3,827	5,249	7,835	11,139
Federal funds purchased and securities sold under agreement to repurchase	85	80	167	158
Long-term debt	556	619	1,133	1,248
Junior subordinated debt	165	162	328	330
Other		1	(1)	1
Total interest expense	7,321	8,418	14,745	17,494
Net interest revenue	107,309	103,081	213,382	204,604
Provision for credit losses	(5,000)		(10,000)
Net interest revenue, after provision for credit losses	112,309	103,081	223,382	204,604
NONINTEREST REVENUE:
Mortgage lending	14,102	9,089	22,669	12,483
Credit card, debit card and merchant fees	9,298	8,567	17,837	16,410
Deposit service charges	11,527	12,437	22,779	24,973
Security (losses) gains, net	41	5	55	1
Insurance commissions	29,319	28,621	62,812	60,220
Wealth management	5,508	5,929	11,718	11,951
Other	4,519	5,190	9,759	10,317
Total noninterest revenue	74,314	69,838	147,629	136,355
NONINTEREST EXPENSE:
Salaries and employee benefits	79,759	74,741	160,938	153,624
Occupancy, net of rental income	10,419	10,245	20,613	20,532
Equipment	4,024	4,169	7,998	8,668
Deposit insurance assessments	2,377	2,035	4,688	3,635
Other	31,598	36,764	70,873	68,202
Total noninterest expense	128,177	127,954	265,110	254,661
Income before income taxes	58,446	44,965	105,901	86,298
Income tax expense	18,733	14,097	33,922	26,986
Net income	$ 39,713	$ 30,868	$ 71,979	$ 59,312
Earnings per share:
Basic (in dollars per share)	$ 0.41	$ 0.32	$ 0.75	$ 0.62
Diluted (in dollars per share)	0.41	0.32	0.74	0.62
Dividends declared per common share (in dollars per share)	$ 0.075	$ 0.05	$ 0.15	$ 0.10