Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - 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 loss	$ (81,468)	$ (19,054)	$ (157,541)	$ (150,153)
Other comprehensive income (loss):
Pension obligation adjustment, net of tax	427	(125)	409	(1,358)
TOTAL COMPREHENSIVE LOSS	$ (81,041)	$ (19,179)	$ (157,132)	$ (151,511)