Schedule I—Condensed Financial Information of Registrant - Condensed Statements of Operations and Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Operating costs and expenses									$ 30,940	$ 62,819	$ 59,300
Operating costs and expenses—affiliates									29,379	21,115	29,304
Income (loss) from operations	$ (18,739)	$ 35,921	$ (4,318)	$ (9,822)	$ 5,275	$ (1,862)	$ (7,791)	$ 4,893	3,042	515	(32,029)
Net loss	$ (56,040)	$ (24,132)	$ (60,043)	$ (178,676)	$ (70,839)	$ (43,240)	$ (226,224)	$ (69,733)	(318,891)	(410,036)	(258,117)
Other comprehensive income attributable to affiliates									0	0	27,240
Comprehensive loss									(318,891)	(410,036)	(230,877)
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Operating costs and expenses									5,737	3,383	3,041
Operating costs and expenses—affiliates									11,546	11,556	11,376
Income (loss) from operations									(17,283)	(14,939)	(14,417)
Interest income									173	162	242
Equity loss of affiliates									(301,781)	(395,259)	(243,942)
Net loss									(318,891)	(410,036)	(258,117)
Other comprehensive income attributable to affiliates									0	0	27,240
Comprehensive loss									$ (318,891)	$ (410,036)	$ (230,877)