Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Interest income:
Loans, including fees	$ 79,857	$ 78,700	$ 238,111	$ 239,988
Investment securities:
Taxable	4,106	3,982	11,590	11,860
Tax-exempt	1,112	1,236	3,262	3,463
Federal funds sold and securities purchased under agreements to resell	487	430	1,362	1,331
Total interest income	85,562	84,348	254,325	256,642
Interest expense:
Deposits	1,811	2,395	5,550	7,056
Federal funds purchased and securities sold under agreements to repurchase	95	87	296	277
Other borrowings	641	1,497	2,138	4,500
Total interest expense	2,547	3,979	7,984	11,833
Net interest income	83,015	80,369	246,341	244,809
Provision for loan losses	1,075	2,091	5,038	5,109
Net interest income after provision for loan losses	81,940	78,278	241,303	239,700
Noninterest income:
Service charges on deposit accounts	19,212	17,637	53,403	52,079
Trust and investment services income	5,489	4,490	15,474	13,845
Mortgage banking income	4,817	4,124	18,532	12,098
Securities losses, net		(90)		(2)
Amortization of FDIC indemnification assets	(1,871)	(4,825)	(7,120)	(17,718)
Other	2,124	3,117	6,069	9,096
Total noninterest income	29,771	24,453	86,358	69,398
Noninterest expense:
Salaries and employee benefits	40,013	40,029	120,754	119,398
Merger expense		6,846		19,341
Net occupancy expense	5,395	5,387	15,678	16,758
Information services expense	4,736	3,417	13,076	12,154
Furniture and equipment expense	2,554	3,166	8,461	10,171
OREO expense and loan related	2,717	3,374	7,750	9,313
Bankcard expense	2,448	2,141	6,713	6,520
Branch consolidation expense	3,091		5,328
Amortization of intangibles	2,078	2,080	6,058	6,268
Professional fees	1,377	1,681	4,391	4,863
Supplies, printing and postage expense	1,248	1,268	3,685	4,111
FDIC assessment and other regulatory charges	1,383	1,068	4,377	3,501
Advertising and marketing	1,054	837	2,918	2,679
Other	5,100	3,764	16,019	13,286
Total noninterest expense	73,194	75,058	215,208	228,363
Earnings:
Income before provision for income taxes	38,517	27,673	112,453	80,735
Provision for income taxes	13,377	8,346	38,515	26,546
Net income	25,140	19,327	73,938	54,189
Preferred stock dividends				1,073
Net income available to common shareholders	$ 25,140	$ 19,327	$ 73,938	$ 53,116
Earnings per common share:
Basic (in dollars per share)	$ 1.05	$ 0.81	$ 3.09	$ 2.22
Diluted (in dollars per share)	1.04	0.80	3.05	2.20
Dividends per common share (in dollars per share)	$ 0.25	$ 0.21	$ 0.72	$ 0.60
Weighted-average common shares outstanding:
Basic (in shares)	23,984	23,899	23,956	23,890
Diluted (in shares)	24,285	24,160	24,235	24,139