Income Taxes - Schedule of Activity in Valuation Allowance on Deferred Tax Assets (Details) - USD ($) $ in Thousands	1 Months Ended	11 Months Ended	12 Months Ended
	Feb. 09, 2018	Dec. 31, 2018	Dec. 31, 2017
Deferred Tax Assets, Valuation Allowance [Roll Forward]
Balance at beginning of period	$ 328,661	$ 178,303	$ 346,199
Fresh start accounting adjustments	(148,091)
ASC 610 accounting adjustments	10,286	45
Charges to income tax expense	0	43,565	0
Deductions	(12,553)	0	(17,538)
Balance at end of period	$ 178,303	$ 221,913	$ 328,661