Selected Quarterly Financial Data - Schedule of Selected Quarterly Financial Data (Detail) - USD ($)	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	$ 94,025,000	$ 97,189,000	$ 105,287,000	$ 130,503,000	$ 148,748,000	$ 173,418,000	$ 185,941,000	$ 204,076,000	$ 427,004,000	$ 712,183,000	$ 968,684,000
Operating gross margin	(19,694,000)	(21,965,000)	(20,225,000)	(13,428,000)	(3,460,000)	4,871,000	4,021,000	24,267,000	(75,312,000)	29,699,000	154,182,000
Operating income	(30,190,000)	(29,576,000)	(28,222,000)	(23,269,000)	(20,718,000)	(4,547,000)	(7,944,000)	15,871,000	(111,257,000)	(17,338,000)	120,220,000
Net income (loss) attributable to controlling interest	$ (48,929,000)	$ (46,228,000)	$ (39,822,000)	$ (95,835,000)	$ (35,646,000)	$ (48,620,000)	$ (14,029,000)	$ 3,222,000	$ (230,814,000)	$ (95,073,000)	$ 23,451,000
Basic earnings per share - net income (loss)	$ (0.39)	$ (0.37)	$ (0.32)	$ (0.78)	$ (0.29)	$ (0.40)	$ (0.11)	$ 0.03	$ (1.86)	$ (0.78)	$ 0.19
Diluted earnings per share - net income (loss)	$ (0.39)	$ (0.37)	$ (0.32)	$ (0.78)	$ (0.29)	$ (0.40)	$ (0.11)	$ 0.03	$ (1.86)	$ (0.78)	$ 0.19