Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (403,922)	$ 25,826	$ (399,106)	$ 22,708
Other comprehensive loss:
Unrealized losses, net of tax impact of ($204), $-, ($379) and $-	(370)		(687)
Reclassifications to net income, net of tax impact of $79, $-, $79 and $-	143		143
Net change	(227)		(544)
Available-for-sale securities:
Unrealized losses, net of tax impact of ($4), $-, ($4) and $-	(6)	(34)	(6)	(34)
Other comprehensive loss	(233)	(34)	(550)	(34)
Comprehensive income (loss)	$ (404,155)	$ 25,792	$ (399,656)	$ 22,674