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, 2016
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance, end of period	$ 52,153
Domestic
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance, beginning of period	47,898
Balance, end of period	43,037	$ 47,898
Foreign
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance, beginning of period	8,725
Balance, end of period	9,116	8,725
Provision charged to expense | Domestic
Valuation and Qualifying Accounts Disclosure [Line Items]
Increase (decrease) in valuation allowance	(6,403)
Provision charged to expense | Foreign
Valuation and Qualifying Accounts Disclosure [Line Items]
Increase (decrease) in valuation allowance	161
Fresh-start accounting adjustments | Domestic
Valuation and Qualifying Accounts Disclosure [Line Items]
Increase (decrease) in valuation allowance	0
Fresh-start accounting adjustments | Foreign
Valuation and Qualifying Accounts Disclosure [Line Items]
Increase (decrease) in valuation allowance	0
Provision charged to discontinued operations and other comprehensive income | Domestic
Valuation and Qualifying Accounts Disclosure [Line Items]
Increase (decrease) in valuation allowance	1,542
Impact of foreign exchange on beginning of period balance | Foreign
Valuation and Qualifying Accounts Disclosure [Line Items]
Increase (decrease) in valuation allowance	230
Predecessor
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance, beginning of period		79,908
Balance, end of period			$ 79,908
Predecessor | Domestic
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance, beginning of period	47,898	69,683	55,474
Balance, end of period		47,898	69,683
Predecessor | Foreign
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance, beginning of period	$ 8,725	10,225	8,481
Balance, end of period		8,725	10,225
Predecessor | Provision charged to expense | Domestic
Valuation and Qualifying Accounts Disclosure [Line Items]
Increase (decrease) in valuation allowance		(16,765)	18,906
Predecessor | Provision charged to expense | Foreign
Valuation and Qualifying Accounts Disclosure [Line Items]
Increase (decrease) in valuation allowance		(1,779)	2,446
Predecessor | Fresh-start accounting adjustments | Domestic
Valuation and Qualifying Accounts Disclosure [Line Items]
Increase (decrease) in valuation allowance		(5,020)	0
Predecessor | Fresh-start accounting adjustments | Foreign
Valuation and Qualifying Accounts Disclosure [Line Items]
Increase (decrease) in valuation allowance		(354)
Predecessor | Provision charged to discontinued operations and other comprehensive income | Domestic
Valuation and Qualifying Accounts Disclosure [Line Items]
Increase (decrease) in valuation allowance		0	(4,697)
Predecessor | Impact of foreign exchange on beginning of period balance | Foreign
Valuation and Qualifying Accounts Disclosure [Line Items]
Increase (decrease) in valuation allowance		$ 633	$ (702)