Chapter 11 Proceedings, Ability to Continue as a Going Concern (Components of liabilities subject to compromise) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Liabilities Subject To Compromise [Abstract]
Accounts payable	$ 1,300	$ 1,322
Accrued liabilities	6,304	6,303
Accrued interest payable	185,112	99,774
Debt	3,759,000	3,759,000
Other terminated contracts	224,349	171,642
Liabilities subject to compromise	$ 4,176,065	$ 4,038,041