Selected Quarterly Financial Data (Unaudited) - Schedule of Selected Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 63,416	$ 193,691	$ (28,158)	$ 156,961	$ 190,226	$ 230,393	$ 112,294	$ 176,077	$ 385,910	$ 708,990	$ 670,762
Loss from operations	(190,949)	(157,995)	(323,412)	(195,794)	(812,375)	(529,252)	(21,620)	28,533	(868,150)	(1,334,714)	225,627
Income tax (benefit) expense recorded	842	(3,407)	(157)	(191)	(36,663)	(216,603)	(17,214)	14,479	(2,913)	(256,001)	153,341
Net (loss) income	$ (240,370)	$ (157,296)	$ (339,776)	$ (242,267)	$ (830,869)	$ (388,209)	$ (31,325)	$ 25,519	$ (979,709)	$ (1,224,884)	$ 247,403
Basic (usd per share)	$ (1.86)	$ (1.25)	$ (2.71)	$ (2.17)	$ (7.67)	$ (3.59)	$ (0.32)	$ 0.30	$ (7.97)	$ (12.27)	$ 2.90
Diluted (usd per share)	$ (1.86)	$ (1.25)	$ (2.71)	$ (2.17)	$ (7.67)	$ (3.59)	$ (0.32)	$ 0.30	$ (7.97)	$ (12.27)	$ 2.88