Consolidated Statements of Comprehensive Income (Loss) (unaudited) (Parenthetical) (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 unrealized gain (loss) on available for sale securities, net of tax	$ (3,185)	$ 1,311	$ (3,458)	$ 436
Reclassification adjustment for realized gains on available for sale securities called or sold, net of tax of tax	$ (87)	$ (292)	$ (87)	$ (328)