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 Other Comprehensive Income [Abstract]
Net income (loss)	$ (3,363)	$ 2,302	$ 22,987	$ 10,102
Other comprehensive income:
Change in unrealized gains on investments, net of tax	537	168	229	278
Less: reclassification adjustment for net investment gains included in net income (loss), net of tax	(3)	0	(19)	(81)
Total other comprehensive income	534	168	210	197
Comprehensive income (loss)	$ (2,829)	$ 2,470	$ 23,197	$ 10,299