Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net loss	$ (37,643)	$ (120,960)
Change in fair value of derivative instruments, accounted for as hedges, net of income tax expense (benefit) of ($86) and $947, respectively	(145)	1,598
Comprehensive loss	$ (37,788)	$ (119,362)