CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income (loss)		$ (757,744)	$ (447,710)	$ 666,051
Other Comprehensive loss, net of tax, Pension liability adjustment,	[1]	(1,154)	(2,090)	(5,896)
Total other comprehensive loss, net of tax		(1,154)	(2,090)	(5,896)
Total comprehensive income (loss)		$ (758,898)	$ (449,800)	$ 660,155

[1] Refer to Note 1 - Summary of Significant Accounting Policies for detail of the pension amount reclassified to general and administrative expense on the Company’s consolidated statements of operations.