Supplemental Quarterly Financial Information (Details) - USD ($) $ / shares in Units, shares in Thousands, $ 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]
Total revenue	$ 161,464	$ 55,438	$ 42,195	$ 30,314	$ 40,418	$ 54,581	$ 73,231	$ 64,142	$ 289,411	$ 232,372	$ 468,456
Operating income	105,469	(13,013)	(33,565)	(36,577)	(62,456)	(19,739)	(11,058)	(20,182)	22,314	(113,435)	111,639
Net income (loss)	$ (27,177)	$ (148,776)	$ (80,937)	$ (35,261)	$ (47,209)	$ (9,423)	$ (23,332)	$ (18,232)	$ (292,151)	$ (98,196)	$ 43,881
Net income (loss) per common share:
Basic (in dollars per share)	$ (1.54)	$ (10.62)	$ (6.65)	$ (2.90)	$ (3.88)	$ (0.77)	$ (1.92)	$ (1.50)	$ (20.87)	$ (8.07)	$ 3.61
Diluted (in dollars per share)	$ (1.54)	$ (10.62)	$ (6.65)	$ (2.90)	$ (3.88)	$ (0.77)	$ (1.92)	$ (1.50)	$ (20.87)	$ (8.07)	$ 3.61
Weighted average common shares outstanding:
Basic (in shares)	17,608	14,013	12,170	12,170	12,170	12,170	12,170	12,170	14,000	12,170	12,167
Diluted (in shares)	17,608	14,013	12,170	12,170	12,170	12,170	12,170	12,170	14,000	12,170	12,167