Chapter 11 Proceedings - Liabilities Subject to Compromise (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Reorganizations [Abstract]
Current maturities of long-term debt and accrued interest	$ 4,179,483
Liabilities Subject to Compromise, Accounts Payable and Accrued Liabilities	157,422
Other long-term liabilities	9,283
Liabilities subject to compromise	$ 4,346,188	$ 0