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Goodwill and Intangible Assets - Carrying Amounts and Useful Lives of Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 286,448	$ 224,393
Accumulated amortization	(117,482)	(98,485)
Foreign currency exchange rate fluctuations	(755)	(1,041)
Net carrying amount	$ 168,211	124,867
Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Useful life	1 year
Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Useful life	30 years
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 187,889	135,234
Accumulated amortization	(64,254)	(54,860)
Foreign currency exchange rate fluctuations	(777)	(1,058)
Net carrying amount	$ 122,858	$ 79,316
Customer relationships | Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Useful life	10 years	10 years
Customer relationships | Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Useful life	30 years	30 years
Acquired technology
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 86,029	$ 77,142
Accumulated amortization	(44,851)	(36,194)
Foreign currency exchange rate fluctuations	6	5
Net carrying amount	$ 41,184	$ 40,953
Acquired technology | Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Useful life	3 years	3 years
Acquired technology | Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Useful life	20 years	20 years
Backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 1,150	$ 1,150
Accumulated amortization	(1,078)	(791)
Foreign currency exchange rate fluctuations	0	0
Net carrying amount	$ 72	$ 359
Useful life	4 years	4 years
Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 7,850	$ 7,650
Accumulated amortization	(5,794)	(5,037)
Foreign currency exchange rate fluctuations	14	11
Net carrying amount	$ 2,070	$ 2,624
Trade names | Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Useful life	1 year	6 years
Trade names | Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Useful life	12 years	12 years
Patents
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 2,930	$ 3,217
Accumulated amortization	(1,455)	(1,603)
Foreign currency exchange rate fluctuations	2	1
Net carrying amount	$ 1,477	$ 1,615
Patents | Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Useful life	2 years	2 years
Patents | Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Useful life	20 years	20 years
Non-compete agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 600
Accumulated amortization	(50)
Foreign currency exchange rate fluctuations	0
Net carrying amount	$ 550
Useful life	3 years

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
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-Name Accounting Standards Codification
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