Guarantor Financial Information (Details 3) - USD ($) $ 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
Condensed consolidating financial statements
Total revenue	$ 161,464	$ 55,438	$ 42,195	$ 30,314	$ 40,418	$ 54,581	$ 73,231	$ 64,142	$ 289,411	$ 232,372	$ 468,456
Costs and expenses									267,097	345,807	356,817
Operating income	105,469	(13,013)	(33,565)	(36,577)	(62,456)	(19,739)	(11,058)	(20,182)	22,314	(113,435)	111,639
Other income (expense)									(344,792)	(39,900)	(43,071)
Equity in earnings of subsidiaries									0	0	0
Income tax (expense) benefit									30,327	55,139	(24,687)
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
Issuer
Condensed consolidating financial statements
Total revenue									235,841	169,705	324,055
Costs and expenses									172,727	244,187	242,658
Operating income									63,114	(74,482)	81,397
Other income (expense)									(337,807)	(41,187)	(45,538)
Equity in earnings of subsidiaries									(31,060)	(24,483)	21,261
Income tax (expense) benefit									13,602	41,956	(13,239)
NET INCOME (LOSS)									(292,151)	(98,196)	43,881
Guarantor Subsidiaries
Condensed consolidating financial statements
Total revenue									52,609	61,224	140,857
Costs and expenses									93,114	87,008	111,750
Operating income									(40,505)	(25,784)	29,107
Other income (expense)									(7,753)	(808)	919
Equity in earnings of subsidiaries									0	0	0
Income tax (expense) benefit									16,890	9,307	(10,509)
NET INCOME (LOSS)									(31,368)	(17,285)	19,517
Non-Guarantor Subsidiary
Condensed consolidating financial statements
Total revenue									961	1,443	3,544
Costs and expenses									1,256	14,612	2,409
Operating income									(295)	(13,169)	1,135
Other income (expense)									768	2,095	1,548
Equity in earnings of subsidiaries									0	0	0
Income tax (expense) benefit									(165)	3,876	(939)
NET INCOME (LOSS)									308	(7,198)	1,744
Adjustments/Eliminations
Condensed consolidating financial statements
Total revenue									0	0	0
Costs and expenses									0	0	0
Operating income									0	0	0
Other income (expense)									0	0	0
Equity in earnings of subsidiaries									31,060	24,483	(21,261)
Income tax (expense) benefit									0	0	0
NET INCOME (LOSS)									$ 31,060	$ 24,483	$ (21,261)