Chapter 11 Proceedings, Ability to Continue as a Going Concern (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Liabilities Subject To Compromise [Abstract]
Accounts payable	$ 1,251		$ 1,251
Accrued liabilities	6,333		6,333
Accrued interest payable	99,774		99,774
Debt	3,759,000		3,759,000
Other terminated contracts	23,186		23,186
Liabilities subject to compromise	3,889,544		3,889,544		$ 0
Reorganization Items [Abstract]
Professional fees	3,215		6,797
Deferred financing costs	0		18,742
Other	(106)		(247)
Reorganization items, net	$ (3,109)	$ 0	$ (25,292)	$ 0