CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Interest income
Interest and fees on loans	$ 218,659	$ 171,567	$ 150,611
Interest on taxable securities	17,824	16,134	12,086
Interest on nontaxable securities	1,722	1,869	1,626
Interest on deposits in other banks	827	790	236
Interest on federal funds sold	33	33	7
Total interest income	239,065	190,393	164,566
Interest expense
Interest on deposits	12,410	9,752	9,488
Interest on other borrowings	7,284	5,104	5,192
Total interest expense	19,694	14,856	14,680
Net interest income	219,371	175,537	149,886
Provision for loan losses	4,091	5,264	5,648
Net interest income after provision for loan losses	215,280	170,273	144,238
Noninterest income
Service charges on deposit accounts	42,745	34,465	24,614
Mortgage banking activity	48,298	36,800	25,986
Other service charges, commissions and fees	3,575	3,754	2,647
Net gains on sales of securities	94	137	138
Gain on sale of SBA loans	3,974	4,522	3,896
Other noninterest income	7,115	5,908	5,555
Total noninterest income	105,801	85,586	62,836
Noninterest expense
Salaries and employee benefits	106,837	94,003	73,878
Occupancy and equipment	24,397	21,195	17,521
Advertising and marketing	4,181	3,312	2,869
Amortization of intangible assets	4,376	3,741	2,330
Data processing and communications expenses	24,591	19,849	15,551
Legal and other professional fees	9,885	3,448	3,092
Credit resolution-related expenses	6,172	17,707	13,506
Merger and conversion charges	6,376	7,980	3,940
FDIC insurance	3,712	3,475	2,972
Other noninterest expenses	25,308	24,405	15,210
Total noninterest expense	215,835	199,115	150,869
Income before income tax expense	105,246	56,744	56,205
Income tax expense	(33,146)	(15,897)	(17,482)
Net income	72,100	40,847	38,723
Preferred stock dividends	0	0	286
Net income available to common stockholders	$ 72,100	$ 40,847	$ 38,437
Basic earnings per common share	$ 2.10	$ 1.29	$ 1.48
Diluted earnings per common share	2.08	1.27	1.46
Dividends declared per common share	$ 0.30	$ 0.20	$ 0.15
Weighted average common shares outstanding
Basic	34,347	31,762	25,974
Diluted	34,702	32,127	26,259