Consolidated Statements of Changes in Member's (Deficit) Equity - USD ($) $ in Thousands	Total	Capital Contributions [Member]	(Accumulated Deficit) Retained Earnings [Member]
Balance at Dec. 31, 2012	$ (59,323)	$ 86,112	$ (145,435)
Net income	118,947		118,947
Dividend payments to related party on preferred members’ interest	(18,000)		(18,000)
Capital distributions to parent	(29,000)	(29,000)
Other	331	331
Balance at Dec. 31, 2013	12,955	57,443	(44,488)
Net income	137,449		137,449
Dividend payments to related party on preferred members’ interest	(18,000)		(18,000)
Capital distributions to parent	(163,300)	(163,300)
Other	213	213
Balance at Dec. 31, 2014	(30,683)	(105,644)	74,961
Net income	143,993		143,993
Dividend payments to related party on preferred members’ interest	(18,000)		(18,000)
Other	151	151
Balance at Dec. 31, 2015	$ 95,461	$ (105,493)	$ 200,954