INCOME TAXES - Operating loss carryforward (Details) - USD ($) $ in Thousands		1 Months Ended		2 Months Ended	3 Months Ended	9 Months Ended		12 Months Ended
	Oct. 01, 2019	Oct. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2019	Oct. 01, 2019	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
INCOME TAXES
Financial Designation, Predecessor and Successor [Fixed List]	Predecessor				Successor	Predecessor	Predecessor		Predecessor	Predecessor
Expiration of net operating losses	$ 454,200		$ 891,500			$ 454,200			$ 891,500
Deferred tax expense			95,800			(95,791)		$ 0	95,791	$ (5,000)
Net operating loss carryforwards				$ 675,100	$ 675,100			675,100
Net operating loss carryforward subject expiration in 2037				103,200	103,200			$ 103,200
Carryforward period of NOLs that will expire in 2037								20 years
Net operating carryforward not subject to expiration				117,700	117,700			$ 117,700
Valuation allowance			290,333	478,690	478,690			478,690	290,333
Decrease in valuation allowance								188,400
Unrecognized tax benefits	0	$ 0	$ 0	0	$ 0	$ 0	$ 0	$ 0	$ 0	0
Open tax year (in years)									3 years
Interest and penalties	$ 0	$ 0		$ 0			$ 0		$ 0	$ 0