Parent Only Condensed Financial Statements Condensed Balance Sheets (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
ASSETS
Cash and cash equivalents	$ 112,052	$ 52,956	$ 44,804	$ 100,999
Total assets	1,145,635	890,228
Liabilities:
Junior subordinated debentures due to subsidiary grantor trust	5,155	5,155
Total liabilities	1,025,592	772,563
Shareholders’ equity:
Preferred stock, Series C	0	7,000
Common stock	53,981	40,583
Retained earnings	68,348	62,496
Accumulated other comprehensive (loss) income, net of tax	(2,286)	7,586
Total shareholders' equity	120,043	117,665	107,482	97,391
Total liabilities and shareholders' equity	1,145,635	890,228
Parent Company
ASSETS
Cash and cash equivalents	385	2,807	969	1,071
Investment in Bank subsidiary	124,378	119,812
Other assets	523	576
Total assets	125,286	123,195
Liabilities:
Junior subordinated debentures due to subsidiary grantor trust	5,155	5,155
Other liabilities	88	375
Total liabilities	5,243	5,530
Shareholders’ equity:
Preferred stock, Series C	0	7,000
Common stock	53,981	40,583
Retained earnings	68,348	62,496
Accumulated other comprehensive (loss) income, net of tax	(2,286)	7,586
Total shareholders' equity	120,043	117,665
Total liabilities and shareholders' equity	$ 125,286	$ 123,195