Income Taxes - Components of Income Taxes (Details) - USD ($) $ in Thousands	5 Months Ended	7 Months Ended	12 Months Ended
	Dec. 31, 2015	Jul. 31, 2015	Dec. 31, 2017	Dec. 31, 2016
Components of Income (loss) before income taxes
Domestic	$ (34,139)		$ (1,118)	$ (111,056)
Foreign	470		20,101	12,516
Income (loss) before income taxes	(33,669)		18,983	(98,540)
Currently payable:
Federal	0		1,323	0
State and Local	8		32	(1)
Foreign	646		6,581	(771)
Current income taxes	654		7,936	(772)
Deferred:
Federal	(18,308)		(14,801)	10,073
State and Local	(789)		256	(482)
Foreign	(789)		2,030	4,201
Deferred income taxes	(19,886)		(12,515)	13,792
Provision (benefit) for income taxes	(19,232)		(4,579)	13,020
Reconciliation of income tax expense to the U.S. Federal statutory income tax rate to actual tax provision
Tax at Statutory Rate	(11,785)		6,654	(34,490)
State income taxes, net of federal tax benefit	(508)		166	(313)
Effect of Foreign Items	(411)		2,101	(788)
Goodwill impairment	0		0	21,831
Valuation Allowance and unbenefited losses	(2,004)		18,452	28,466
U.S. valuation allowance release	0		(15,388)	0
Deferred Tax Rate Changes	0		(17,312)	0
Transaction Costs	0		470	0
Tax Incentives	(34)		(68)	(82)
Warrants	(4,557)		168	(1,722)
Other	67		178	118
Provision (benefit) for income taxes	$ (19,232)		$ (4,579)	$ 13,020
Predecessor
Components of Income (loss) before income taxes
Domestic		$ 29,053
Foreign		(32,261)
Income (loss) before income taxes		(3,208)
Currently payable:
Federal		14,370
State and Local		305
Foreign		392
Current income taxes		15,067
Deferred:
Federal		(4,115)
State and Local		(57)
Foreign		(46)
Deferred income taxes		(4,218)
Provision (benefit) for income taxes		10,849
Reconciliation of income tax expense to the U.S. Federal statutory income tax rate to actual tax provision
Tax at Statutory Rate		(1,123)
State income taxes, net of federal tax benefit		141
Effect of Foreign Items		2,315
Goodwill impairment		0
Valuation Allowance and unbenefited losses		9,321
U.S. valuation allowance release		0
Deferred Tax Rate Changes		0
Transaction Costs		0
Tax Incentives		0
Warrants		0
Other		195
Provision (benefit) for income taxes		$ 10,849