CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest income
Interest and fees on loans	$ 171,567	$ 150,611	$ 117,497
Interest on taxable securities	16,134	12,086	7,134
Interest on nontaxable securities	1,869	1,626	1,413
Interest on deposits in other banks	790	236	276
Interest on federal funds sold	33	7	2
Total interest income	190,393	164,566	126,322
Interest expense
Interest on deposits	9,752	9,488	8,400
Interest on other borrowings	5,104	5,192	1,737
Total interest expense	14,856	14,680	10,137
Net interest income	175,537	149,886	116,185
Provision for loan losses	5,264	5,648	11,486
Net interest income after provision for loan losses	170,273	144,238	104,699
Other income
Service charges on deposit accounts	34,465	24,614	19,545
Mortgage banking activity	36,800	25,986	19,128
Other service charges, commissions and fees	3,754	2,647	2,151
Net gains on sales of securities	137	138	171
Gain on sale of SBA loans	4,522	3,896	1,500
Other noninterest income	5,908	5,555	4,054
Total noninterest income	85,586	62,836	46,549
Other expenses
Salaries and employee benefits	94,003	73,878	56,670
Occupancy and equipment	21,195	17,521	12,286
Advertising and marketing	3,312	2,869	1,620
Amortization of intangible assets	3,741	2,330	1,414
Data processing and communications expenses	19,849	15,551	11,539
Credit resolution related expenses	17,707	13,506	15,486
Merger and conversion charges	7,980	3,940	4,350
FDIC insurance	3,475	2,972	2,323
Other noninterest expenses	27,853	18,302	16,257
Total noninterest expense	199,115	150,869	121,945
Income before income tax expense	56,744	56,205	29,303
Income tax expense	(15,897)	(17,482)	(9,285)
Net income	40,847	38,723	20,018
Preferred stock dividends	0	286	1,738
Net income available to common stockholders	$ 40,847	$ 38,437	$ 18,280
Basic earnings per common share (in dollars per share)	$ 1.29	$ 1.48	$ 0.76
Diluted earnings per common share (in dollars per share)	1.27	1.46	0.75
Dividends declared per common share (in dollars per share)	$ 0.2	$ 0.15	$ 0
Weighted average common shares outstanding
Basic (in shares)	31,762	25,974	23,918
Diluted (in shares)	32,127	26,259	24,348