CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) [Abstract]
Net income (loss)	$ 7,351	$ (35,776)	$ (112,421)	$ (16,845)
Unrealized losses on securities, net of tax	(170)	(16,157)	(13,458)	(37,493)
Reclassification adjustment for realized (gains) losses included in net income (loss)	525	(20,211)	525	(20,211)
Comprehensive income (loss)	$ 7,706	$ (72,144)	$ (125,354)	$ (74,549)