Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Currency Movement	$ 39
Accounts Receivable - Allowance for Doubtful Accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	2,569	$ 3,137	$ 3,709
Charged to Costs and Expenses	2,282	159	353
Divestitures/ Acquisitions	0	368	0
Charge Offs		(969)	(567)
Recoveries	(637)	(86)	(176)
Currency Movement		(40)	(182)
Ending Balance	5,150	2,569	3,137
Inventories - Excess and Obsolete Allowances
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	21,245	17,364	19,887
Charged to Costs and Expenses	15,915	6,403	2,801
Divestitures/ Acquisitions	0	452	0
Charge Offs	(4,540)	(2,333)	(2,464)
Recoveries	(597)	(606)	(2,675)
Currency Movement	246	(35)	(185)
Ending Balance	32,269	21,245	17,364
Deferred Income Tax Asset - Valuation Allowance
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	48,251	37,235	47,636
Charged to Costs and Expenses	3,142	12,356	13,459
Divestitures/ Acquisitions	33,003	330	(2)
Charge Offs	(303)	0	(22,577)
Recoveries	(114)	(1,629)	(928)
Currency Movement	329	(41)	(353)
Ending Balance	$ 84,308	$ 48,251	$ 37,235