Stockholders' Equity - Schedule of Change In Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended	8 Months Ended	9 Months Ended
	Sep. 30, 2017	Aug. 31, 2017	Sep. 30, 2018	Aug. 31, 2017	Sep. 30, 2018
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance					$ 33,985
Other comprehensive loss before reclassifications, net of tax	$ (2,362)		$ (1,014)		(3,013)
Amounts reclassified from accumulated other comprehensive loss, net of tax	0		0		0
Net current period other comprehensive income (loss)	(2,362)		(1,014)		(3,013)
Adjustment for fresh-start accounting	0		0		0
Ending Balance			15,592		15,592
Defined Benefit Pension and Postretirement Items
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	0		34		34
Other comprehensive loss before reclassifications, net of tax	0		0		0
Amounts reclassified from accumulated other comprehensive loss, net of tax	0		0		0
Net current period other comprehensive income (loss)	0		0		0
Adjustment for fresh-start accounting	0		0		0
Ending Balance	0	$ 0	34	$ 0	34
Foreign Currency Items
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	0		(4,702)		(2,703)
Other comprehensive loss before reclassifications, net of tax	(2,362)		(1,014)		(3,013)
Amounts reclassified from accumulated other comprehensive loss, net of tax	0		0		0
Net current period other comprehensive income (loss)	(2,362)		(1,014)		(3,013)
Adjustment for fresh-start accounting	0		0		0
Ending Balance	(2,362)	0	(5,716)	0	(5,716)
AOCI Attributable to Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	0		(4,668)		(2,669)
Ending Balance	(2,362)	0	$ (5,682)	0	$ (5,682)
Predecessor
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other comprehensive loss before reclassifications, net of tax		2,070		385
Amounts reclassified from accumulated other comprehensive loss, net of tax		(1,436)		(1,008)
Net current period other comprehensive income (loss)		634		(623)
Adjustment for fresh-start accounting		26,562		26,562
Predecessor | Defined Benefit Pension and Postretirement Items
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	0	(9,369)		(9,797)
Other comprehensive loss before reclassifications, net of tax		0		0
Amounts reclassified from accumulated other comprehensive loss, net of tax		(1,436)		(1,008)
Net current period other comprehensive income (loss)		(1,436)		(1,008)
Adjustment for fresh-start accounting		10,805		10,805
Ending Balance		0		0
Predecessor | Foreign Currency Items
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	0	(17,827)		(16,142)
Other comprehensive loss before reclassifications, net of tax		2,070		385
Amounts reclassified from accumulated other comprehensive loss, net of tax		0		0
Net current period other comprehensive income (loss)		2,070		385
Adjustment for fresh-start accounting		15,757		15,757
Ending Balance		0		0
Predecessor | AOCI Attributable to Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 0	(27,196)		(25,939)
Ending Balance		$ 0		$ 0