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
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ (1,147)	$ 562	$ (541)	$ 1,067
Other comprehensive income (loss), net of tax:
Net unrealized gain (loss) on available for sale securities, net of tax of $(3,185) and $1,311 for the three months ended June 30, 2013 and 2012, respectively, and $(3,458) and $436 for the six months ended June 30, 2013 and 2012, respectively	(6,182)	2,545	(6,713)	845
Reclassification adjustment for realized gains on available for sale securities called or sold, net of tax of $(87) and $(292) for the three months ended June 30, 2013 and 2012, respectively, and $(87) and $(328) for the six months ended June 30, 2013 and 2012, respectively	(168)	(568)	(168)	(636)
Total other comprehensive income (loss)	(6,350)	1,977	(6,881)	209
Total comprehensive income (loss)	$ (7,497)	$ 2,539	$ (7,422)	$ 1,276