Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Condensed Consolidated Statements of Comprehensive Income (Loss) [Abstract]
Net Income	$ 5,665	$ 4,910	$ 10,976	$ 9,523
Change in fair value of derivative instruments:
Change in fair value of derivative instruments for the period	1,582	(1,208)	2,020	(645)
Income tax effect	(554)	423	(707)	226
Changes from derivative instruments	1,028	(785)	1,313	(419)
Change in securities available-for-sale:
Unrealized appreciation (depreciation) for the period	(12,168)	1,211	(14,607)	2,080
Reclassification adjustment for securities gains realized in income			368
Income tax effect	4,259	(424)	4,984	(728)
Unrealized gains (losses) on available-for-sale securities	(7,909)	787	(9,255)	1,352
Other Comprehensive Income (Loss), Net of Tax	(6,881)	2	(7,942)	933
Comprehensive Income (Loss)	$ (1,216)	$ 4,912	$ 3,034	$ 10,456