Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 23,564	$ 1,592	$ 24,318	$ 3,688
Unrealized net gain (loss) on available-for-sale securities, net of tax of $0	3,230	(5,127)	7,844	3,095
Less: Reclassification of net realized gains included in net income	(1,300)	(774)	(1,533)	(968)
Comprehensive income (loss)	$ 25,494	$ (4,309)	$ 30,629	$ 5,815