Income Taxes - Summary of Valuation Allowance (Details) - USD ($) $ in Thousands	4 Months Ended	8 Months Ended	12 Months Ended
	Dec. 31, 2017	Aug. 31, 2017	Dec. 31, 2018
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance, beginning of period			$ 52,153
Balance, end of period	$ 52,153		10,842
Domestic
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance, beginning of period			43,037
Balance, end of period	43,037		2,271
Foreign
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance, beginning of period			9,116
Balance, end of period	9,116		8,571
Provision charged to expense | Domestic
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Increase (decrease) in valuation allowance			0
Provision charged to expense | Foreign
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Increase (decrease) in valuation allowance			(108)
Net Operating Loss Carryforward | Domestic
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Increase (decrease) in valuation allowance			(40,766)
Fresh-start accounting adjustments | Domestic
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Increase (decrease) in valuation allowance			0
Fresh-start accounting adjustments | Foreign
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Increase (decrease) in valuation allowance			0
Provision charged to discontinued operations and other comprehensive income | Domestic
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Increase (decrease) in valuation allowance			0
Impact of foreign exchange on beginning of period balance | Foreign
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Increase (decrease) in valuation allowance			(437)
Predecessor | Domestic
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance, beginning of period	47,898	$ 69,683	43,037
Balance, end of period	43,037	47,898
Predecessor | Foreign
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance, beginning of period	8,725	10,225	$ 9,116
Balance, end of period	9,116	8,725
Predecessor | Provision charged to expense | Domestic
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Increase (decrease) in valuation allowance	(6,403)	(16,765)
Predecessor | Provision charged to expense | Foreign
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Increase (decrease) in valuation allowance	161	(1,779)
Predecessor | Net Operating Loss Carryforward | Domestic
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Increase (decrease) in valuation allowance	0	0
Predecessor | Fresh-start accounting adjustments | Domestic
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Increase (decrease) in valuation allowance	0	(5,020)
Predecessor | Fresh-start accounting adjustments | Foreign
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Increase (decrease) in valuation allowance	0	(354)
Predecessor | Provision charged to discontinued operations and other comprehensive income | Domestic
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Increase (decrease) in valuation allowance	1,542	0
Predecessor | Impact of foreign exchange on beginning of period balance | Foreign
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Increase (decrease) in valuation allowance	$ 230	$ 633