Consolidated Statements of Earnings and Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Interest income
Interest and fees on loans	$ 29,859	$ 30,334	$ 58,575	$ 59,816
Interest on taxable securities	1,719	2,187	3,416	4,496
Interest on nontaxable securities	344	374	719	739
Interest on deposits in other banks and federal funds sold	29	112	114	238
Total interest income	31,951	33,007	62,824	65,289
Interest expense
Interest on deposits	2,083	3,635	4,309	7,719
Interest on other borrowings	392	491	701	962
Total interest expense	2,475	4,126	5,010	8,681
Net interest income	29,476	28,881	57,814	56,608
Provision for loan losses	4,165	7,225	7,088	20,107
Net interest income after provision for loan losses	25,311	21,656	50,726	36,501
Noninterest income
Service charges on deposit accounts	4,695	4,770	9,532	9,156
Mortgage banking activity	5,001	3,006	9,465	4,481
Other service charges, commissions and fees	617	322	946	713
Gain on acquisitions				20,037
Gain (loss) on sale of securities	(1)		171
Other noninterest income	1,072	777	2,630	1,752
Total noninterest income	11,384	8,875	22,744	36,139
Noninterest expense
Salaries and employee benefits	13,381	12,125	27,187	23,571
Equipment and occupancy expenses	2,978	2,880	5,909	6,215
Amortization of intangible assets	358	412	722	632
Data processing and telecommunications expenses	2,836	2,905	5,406	4,830
Advertising and marketing expenses	327	364	582	713
Other non-interest expenses	6,808	7,937	15,766	24,908
Total noninterest expense	26,688	26,623	55,572	60,869
Income before income tax expense	10,007	3,908	17,898	11,771
Applicable income tax expense	3,329	1,413	5,935	3,911
Net income	6,678	2,495	11,963	7,860
Less preferred stock dividends	442	817	883	1,632
Net income available to common shareholders	6,236	1,678	11,080	6,228
Other comprehensive income
Unrealized holding gain (loss) arising during period on investment securities available for sale, net of tax	(3,689)	1,934	(4,118)	1,244
Reclassification adjustment for losses (gains) included in earnings, net of tax	1		(111)
Unrealized gain (loss) on cash flow hedges arising during period, net of tax	995	(642)	1,204	(735)
Other comprehensive income (loss)	(2,693)	1,292	(3,025)	509
Total comprehensive income	$ 3,985	$ 3,787	$ 8,938	$ 8,369
Basic and diluted earnings per share	$ 0.26	$ 0.07	$ 0.46	$ 0.26
Weighted average common shares outstanding
Basic	23,879	23,819	23,873	23,791
Diluted	24,288	23,973	24,282	23,945