Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Consolidated Statements of Comprehensive Income [Abstract]
Net income (loss)	$ 1,072	$ (2,007)
Change in net unrealized gains on investments available for sale	1,883	587
Comprehensive income (loss) before tax	2,955	(1,420)
Income tax expense related to items of other comprehensive income (loss)	(708)	(221)
Comprehensive income (loss)	$ 2,247	$ (1,641)