Reorganization Items, Net - Schedule of Reorganization Items (Details) - Predecessor - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Fresh-Start Adjustment [Line Items]
Net gain on debt discharge			$ 540,293
Change in assets resulting from fresh start adjustments			(220,467)
Professional fees			(19,693)
Write-off of debt issuance costs			(23,319)
Fair value of warrants issued to Predecessor stockholders			(8,358)
Distribution of Successor Company equity to Predecessor Company equity holders			(1,372)
DIP credit agreement financing costs			(669)
Other costs			(2,109)
Total	$ (10,200)	$ (10,500)	$ 264,306	$ 0	$ 0