Fresh Start Accounting - Reorganization Items (Details) - Predecessor [Member] $ in Thousands	4 Months Ended
	Apr. 22, 2016 USD ($)
Fresh-Start Adjustment [Line Items]
Gain on settlement of liabilities subject to compromise	$ (863,938)
Fair value of equity issued in excess of DIP principal	67,329
Fresh start adjustments	(222,512)
Reorganization legal and professional fees and expenses	25,573
Fair Value of Equity Issued for Backstop Fee	16,082
Other reorganization items	21,324
(Gain) Loss on Reorganization items, net	$ (956,142)