FRESH START ACCOUNTING - Reorganization Items (Details) - USD ($) $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended							10 Months Ended	12 Months Ended
	Mar. 31, 2017	Feb. 28, 2017	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Fresh-Start Adjustment [Line Items]
Write-off of deferred financing costs											$ (8,332)
Gain on reorganization items, net	$ 0		$ 0	$ 0	$ 0					$ 0
Predecessor
Fresh-Start Adjustment [Line Items]
Gain on settlement of liabilities subject to compromise		$ 230,445
Fresh start valuation adjustments		235,804
Reorganization professional fees and other expenses		(20,403)
Write-off of deferred financing costs		(2,577)
Other reorganization items		(5,525)
Gain on reorganization items, net		$ 437,744				$ (10,947)	$ 0	$ 0	$ 0		$ (10,947)	$ 0