Income Taxes - Components of Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Components of Income (loss) before income taxes
Domestic	$ (32,982)	$ (1,118)	$ (111,056)
Foreign	4,582	20,101	12,516
(Loss) income before income taxes	(28,400)	18,983	(98,540)
Currently payable:
Federal	(631)	1,323	0
State and Local	36	32	(1)
Foreign	1,281	6,581	(771)
Total currently payable	686	7,936	(772)
Deferred:
Federal	(2,404)	(14,801)	10,073
State and Local	(66)	256	(482)
Foreign	3,624	2,030	4,201
Total deferred	1,154	(12,515)	13,792
Reconciliation of income tax expense to the U.S. Federal statutory income tax rate to actual tax provision
Tax at Statutory Rate	(5,962)	6,654	(34,490)
State income taxes, net of federal tax benefit	(54)	166	(313)
Effect of Foreign Items	834	2,101	(788)
Goodwill impairment	0	0	21,831
Valuation Allowance and unbenefited losses	6,018	18,452	28,466
U.S. valuation allowance release	0	(15,388)	0
Deferred Tax Rate Changes	240	(17,312)	0
Transaction Costs	531	470	0
Tax Incentives	(91)	(68)	(82)
Warrants	0	168	(1,722)
Other	324	178	118
Provision (benefit) for income taxes	$ 1,840	$ (4,579)	$ 13,020