CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 3,114	$ 208,938	$ (107,452)	$ 334,325
Pension liability adjustment	(20)	196	(772)	526
Total other comprehensive income (loss), net of tax	(20)	196	(772)	526
Total comprehensive income (loss)	$ 3,094	$ 209,134	$ (108,224)	$ 334,851