CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement Of Income And Comprehensive Income [Abstract]
Net (loss) income		$ (118,594)	$ 171,389	$ (90,910)	$ 203,910
Other comprehensive income:
De-designated hedges reclassified into natural gas, NGLs and oil sales, net of taxes	[1]	0	(3,046)	0	(4,286)
Total comprehensive (loss) income		$ (118,594)	$ 168,343	$ (90,910)	$ 199,624

[1] Amounts are net of income tax benefit of $1,866 for the three months ended June 30, 2014 and $2,790 for the six months ended June 30, 2014. As of March 31, 2013, we elected to discontinue hedge accounting prospectively and as of December 31, 2014, all remaining accumulated other comprehensive income (“AOCI”) hedging gains had been transferred to earnings.