Accumulative Other Comprehensive Income (Loss) (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Accumulated other comprehensive loss, net of tax
Accumulated other comprehensive income (loss) at beginning of period			$ 74	$ (2,011)
Other comprehensive income (loss) before reclassification			(724)	626
Amount reclassified from accumulated other comprehensive income			10	(4)
Net current-period other comprehensive income (loss)			(714)	622
Accumulated other comprehensive income (loss) at end of period	(640)	(1,389)	(640)	(1,389)
Unrealized Gains (Losses) on Available-for-Sale Securities
Accumulated other comprehensive loss, net of tax
Accumulated other comprehensive income (loss) at beginning of period	42	(1,261)	74	(2,011)
Other comprehensive income (loss) before reclassification	(781)	649	(808)	1,399
Amount reclassified from accumulated other comprehensive income	99		94
Net current-period other comprehensive income (loss)	(682)	649	(714)	1,399
Accumulated other comprehensive income (loss) at end of period	$ (640)	$ (612)	$ (640)	$ (612)