Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net income	$ 7,930	$ 5,832	$ 22,881	$ 18,217
Other comprehensive income, net of tax:
Unrealized gain (loss) on investment securities arising during the period, net of tax	3,248	(261)	6,526	6,302
Less reclassification adjustment for realized gain on sale of securities included in net income, net of tax	0	(491)	(740)	(926)
Reclassification of cash flow hedge, net of tax	0	(28)	0	(85)
Total other comprehensive income (loss)	3,248	(780)	5,786	5,291
Total comprehensive income	$ 11,178	$ 5,052	$ 28,667	$ 23,508