Income Taxes - Narrative (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
Income Tax Contingency [Line Items]
Income tax expense (benefit)	$ 286	[1]			$ (2,068)		$ (4,026)
Pre-tax loss from continuing operations	$ (535)	[1]			$ (8,723)		$ (24,335)
Effective tax rate (as a percent)	(53.50%)				23.70%		16.50%
Predecessor
Income Tax Contingency [Line Items]
Income tax expense (benefit)			$ (1,395)	[1]		$ (1,387)
Pre-tax loss from continuing operations			$ 70,828	[1]		$ 34,803
Effective tax rate (as a percent)			(2.00%)			(4.00%)

[1] * Adjusted due to the adoption of ASU No. 2017-07, "Compensation – Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost." See Note 3 - New Accounting Standards, for additional information.