Fresh Start Accounting - Reorganization Items (Details) - USD ($) $ in Thousands	2 Months Ended	4 Months Ended
	Jun. 30, 2016	Apr. 22, 2016
Successor [Member]
Fresh-Start Adjustment [Line Items]
Gain on settlement of liabilities subject to compromise	$ 0
Fair value of equity issued in excess of DIP principal	0
Fresh start adjustments	0
Reorganization legal and professional fees and expenses	342
Fair Value of Equity Issued for Backstop Fee	0
Other reorganization items	(66)
(Gain) Loss on Reorganization items, net	$ 276
Predecessor [Member]
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)