FRESH START ACCOUNTING - Reconciliation of Enterprise Value to Estimated Fair Value of Successor Common Stock (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended	7 Months Ended
	Mar. 01, 2017	Feb. 28, 2017	Sep. 30, 2017	Sep. 30, 2017
Reorganizations [Abstract]
Enterprise value		$ 419,720
Plus: Cash and other assets		371,169
Less: Fair value of debt		(236,261)
Less: Fair value of warrants		(15,648)	$ (15,600)	$ (15,600)
Fair value of Successor common stock		$ 538,980
Shares issued upon emergence (in shares)	20,000,000	20,000,000	0	1,195
Per share value (in usd per share)		$ 26.949