CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - 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 (loss)	$ (57,508)	$ 59,780	$ (110,566)	$ 125,387
Pension liability adjustment	(576)	330	(752)	330
Total other comprehensive income (loss), net of tax	(576)	330	(752)	330
Total comprehensive income (loss)	$ (58,084)	$ 60,110	$ (111,318)	$ 125,717