INCOME TAXES - Reconciliation of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	1 Months Ended	11 Months Ended	12 Months Ended
	Jan. 31, 2015	Dec. 31, 2015	Dec. 31, 2017	Dec. 31, 2016
Reconciliation of the beginning and ending amount of unrecognized tax benefits
Balance, beginning of period		$ 137,593	$ 9,856	$ 13,138
Additions for tax positions of the current year		2,213	1,857	2,122
Additions for tax positions of prior years		1,811	70	1,318
Reductions of tax positions of prior years:
Changes in judgment		(16,416)	(430)	(975)
Settlements during the period		(112,063)	0	(5,747)
Lapses of applicable statute of limitations		0	0	0
Balance, end of period	$ 137,593	13,138	11,353	9,856
Unrecognized tax benefits with certainty of deductibility but with uncertainty about the timing of deductions		5,600	700	700
Amount of unrecognized tax benefits that would affect the effective income tax rate if recognized		7,500	10,700	9,200
Accrued interest related to the unrecognized tax benefits included in income tax expense (benefit)		(1,600)	2,400	3,100
Accrued interest associated with unrecognized tax benefits		15,400	1,100	$ 2,800
Net refund in future period			6,200
Decrease in unrecognized tax benefits			$ 700
Predecessor
Reconciliation of the beginning and ending amount of unrecognized tax benefits
Balance, beginning of period	193,244	$ 137,593
Decrease for tax positions of the current year	(5,010)
Additions for tax positions of prior years	7,724
Reductions of tax positions of prior years:
Changes in judgment	(58,365)
Settlements during the period	0
Lapses of applicable statute of limitations	0
Balance, end of period	137,593
Unrecognized tax benefits with certainty of deductibility but with uncertainty about the timing of deductions	126,000
Amount of unrecognized tax benefits that would affect the effective income tax rate if recognized	11,500
Accrued interest related to the unrecognized tax benefits included in income tax expense (benefit)	900
Accrued interest associated with unrecognized tax benefits	$ 12,700