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
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) [Abstract]
Net income (loss)	$ 35,648	$ (12,081)	$ 18,931	$ (43,361)
Unrealized (losses) gains on securities, net of tax	(28,703)	(4,456)	(21,336)	3,806
Reclassification adjustment for realized losses (gains) included in net income (loss)	0	175	0	(167)
Comprehensive income (loss)	$ 6,945	$ (16,362)	$ (2,405)	$ (39,722)