FRESH START ACCOUNTING - Reorganization Adjustments - Cumulative Effect of Emergence (Details) - USD ($) $ in Thousands		3 Months Ended		4 Months Ended	5 Months Ended	9 Months Ended
	May 01, 2019	Sep. 30, 2019	Sep. 30, 2018	May 01, 2019	Sep. 30, 2019	Sep. 30, 2019	Sep. 30, 2018
Reorganizations [Abstract]
Gain on settlement of Liabilities subject to compromise	$ 7,192,374			$ 7,192,374	$ 0	$ 0
Payment of professional fees upon emergence	(11,509)
Payment of success fees upon emergence	(86,065)
Cancellation of unvested stock-based compensation awards	(1,530)
Cancellation of Predecessor prepaid director and officer insurance policy	(2,331)
Write-off of debt issuance and Mandatorily Redeemable Preferred Stock costs incurred at emergence	(8,726)
Reorganization items, net	7,082,213	$ 0	$ (52,475)	$ 9,461,826	$ 0		$ (313,270)
Income tax benefit	102,914
Cancellation of Predecessor Equity	2,074,190
Issuance of Successor Equity to prior equity holders	27,701
Net Impact on Accumulated deficit	9,231,616
Compensation expense	$ 1,500