Consolidated Statements of Earnings and Comprehensive Income (Loss) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Interest income
Interest and fees on loans	$ 29,633	$ 29,165	$ 88,208	$ 88,981
Interest on taxable securities	1,720	2,017	5,136	6,513
Interest on nontaxable securities	352	365	1,071	1,104
Interest on deposits in other banks and federal funds sold	44	104	158	342
Total interest income	31,749	31,651	94,573	96,940
Interest expense
Interest on deposits	2,025	3,005	6,334	10,724
Interest on other borrowings	404	408	1,105	1,370
Total interest expense	2,429	3,413	7,439	12,094
Net interest income	29,320	28,238	87,134	84,846
Provision for loan losses	2,920	6,540	10,008	26,647
Net interest income after provision for loan losses	26,400	21,698	77,126	58,199
Noninterest income
Service charges on deposit accounts	4,948	5,121	14,480	14,277
Mortgage banking activity	5,232	3,740	14,697	8,221
Other service charges, commissions and fees	593	331	1,539	1,044
Gain on acquisitions				20,037
Gain (loss) on sale of securities			171
Other noninterest income	1,515	639	4,145	2,391
Total noninterest income	12,288	9,831	35,032	45,970
Noninterest expense
Salaries and employee benefits	14,412	13,766	41,599	37,337
Equipment and occupancy expenses	3,149	3,340	9,058	9,555
Amortization of intangible assets	346	364	1,068	996
Data processing and telecommunications expenses	3,072	2,599	8,478	7,429
Advertising and marketing expenses	434	421	1,016	1,134
Other noninterest expenses	7,336	8,320	23,102	33,228
Total noninterest expense	28,749	28,810	84,321	89,679
Income before income tax expense	9,939	2,719	27,837	14,490
Applicable income tax expense	3,262	816	9,197	4,727
Net income	6,677	1,903	18,640	9,763
Less preferred stock dividends	443	827	1,326	2,459
Net income available to common shareholders	6,234	1,076	17,314	7,304
Other comprehensive income (loss)
Unrealized holding gain (loss) arising during period on investment securities available for sale, net of tax	(4,007)	(228)	(8,125)	1,017
Reclassification adjustment for losses (gains) included in earnings, net of tax			(111)
Unrealized gain (loss) on cash flow hedges arising during period, net of tax	(106)	(240)	1,098	(976)
Other comprehensive income (loss)	(4,113)	(468)	(7,138)	41
Total comprehensive income	$ 2,121	$ 608	$ 10,176	$ 7,345
Basic earnings per share	$ 0.26	$ 0.05	$ 0.72	$ 0.31
Diluted earnings per share	$ 0.26	$ 0.04	$ 0.71	$ 0.30
Weighted average common shares outstanding
Basic	23,901	23,819	23,883	23,800
Diluted	24,316	23,973	24,298	23,954