Consolidated Statements of Earnings and Comprehensive Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Interest income
Interest and fees on loans	$ 35,297	$ 29,859	$ 69,766	$ 58,575
Interest on taxable securities	2,953	1,719	5,938	3,416
Interest on nontaxable securities	312	344	647	719
Interest on deposits in other banks and federal funds sold	45	29	129	114
Total interest income	38,607	31,951	76,480	62,824
Interest expense
Interest on deposits	2,205	2,083	4,388	4,309
Interest on other borrowings	1,138	392	2,344	701
Total interest expense	3,343	2,475	6,732	5,010
Net interest income	35,264	29,476	69,748	57,814
Provision for loan losses	1,365	4,165	3,091	7,088
Net interest income after provision for loan losses	33,899	25,311	66,657	50,726
Noninterest income
Service charges on deposit accounts	5,847	4,695	11,433	9,532
Mortgage banking activity	7,002	5,001	12,166	9,465
Other service charges, commissions and fees	662	617	1,314	946
Gain (loss) on sale of securities		(1)	6	171
Other noninterest income	2,308	1,072	3,654	2,630
Total noninterest income	15,819	11,384	28,573	22,744
Noninterest expense
Salaries and employee benefits	16,942	13,381	34,336	27,187
Occupancy and equipment	4,071	2,978	8,135	5,909
Advertising and marketing expenses	718	327	1,428	582
Amortization of intangible assets	437	358	970	722
Data processing and telecommunications expenses	3,940	2,836	7,394	5,406
Other noninterest expenses	11,210	6,808	18,294	15,766
Total noninterest expense	37,318	26,688	70,557	55,572
Income before income tax expense	12,400	10,007	24,673	17,898
Income tax expense	4,270	3,329	8,193	5,935
Net income	8,130	6,678	16,480	11,963
Less preferred stock dividends and discount accretion		442	286	883
Net income available to common shareholders	8,130	6,236	16,194	11,080
Other comprehensive income (loss)
Unrealized holding gain (loss) arising during period on investment securities available for sale, net of tax	2,121	(3,689)	5,059	(4,118)
Reclassification adjustment for losses (gains) included in earnings, net of tax		1	(4)	(111)
Unrealized gain (loss) on cash flow hedges arising during period, net of tax	(372)	995	(638)	1,204
Other comprehensive income (loss)	1,749	(2,693)	4,417	(3,025)
Total comprehensive income	$ 9,879	$ 3,985	$ 20,897	$ 8,938
Basic earnings per common share	$ 0.32	$ 0.26	$ 0.64	$ 0.46
Diluted earnings per common share	$ 0.32	$ 0.26	$ 0.63	$ 0.46
Dividends declared per common share	$ 0.05		$ 0.05
Weighted average common shares outstanding
Basic	25,181	23,879	25,163	23,873
Diluted	25,572	24,288	25,552	24,282