Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 1,965	$ (194)	$ 9,551	$ (1,590)
Unrealized net gain on available-for-sale securities, net of tax of $0	806		2,201
Comprehensive income (loss)	$ 2,771	$ (194)	$ 11,752	$ (1,590)