Goodwill and Other Intangible Assets - Schedule of Intangible Assets Subject to Amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Finite-lived Intangible Assets [Roll Forward]
Intangible assets subject to amortization, beginning balance	$ 226,147	$ 254,430
Intangible assets acquired during the year	12,789	2,092
Amortization during the year	(28,891)	(27,613)	$ (30,745)
Currency translation during the year	14,294	(2,762)
Intangible assets subject to amortization, ending balance	224,339	226,147	254,430
Customer relationships
Finite-lived Intangible Assets [Roll Forward]
Intangible assets subject to amortization, beginning balance	218,441	244,628
Intangible assets acquired during the year	12,789	2,092
Amortization during the year	(26,612)	(25,527)
Currency translation during the year	13,921	(2,752)
Intangible assets subject to amortization, ending balance	218,539	218,441	244,628
Patents
Finite-lived Intangible Assets [Roll Forward]
Intangible assets subject to amortization, beginning balance	2,228	4,495
Intangible assets acquired during the year	0	0
Amortization during the year	(2,195)	(2,156)
Currency translation during the year	111	(111)
Intangible assets subject to amortization, ending balance	144	2,228	4,495
Other
Finite-lived Intangible Assets [Roll Forward]
Intangible assets subject to amortization, beginning balance	5,478	5,307
Intangible assets acquired during the year	0	0
Amortization during the year	(84)	70
Currency translation during the year	262	101
Intangible assets subject to amortization, ending balance	$ 5,656	$ 5,478	$ 5,307