Goodwill and Intangible Assets - Carrying Amounts and Useful Lives of Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 224,393	$ 247,495
Accumulated amortization	(98,485)	(102,687)
Foreign currency exchange rate fluctuations	(1,041)	(1,122)
Net carrying amount	$ 124,867	143,686
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	$ 135,234	135,234
Accumulated amortization	(54,860)	(45,029)
Foreign currency exchange rate fluctuations	(1,058)	(1,185)
Net carrying amount	$ 79,316	$ 89,020
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	$ 77,142	$ 78,122
Accumulated amortization	(36,194)	(29,206)
Foreign currency exchange rate fluctuations	5	42
Net carrying amount	$ 40,953	$ 48,958
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	$ 21,350
Accumulated amortization	(791)	(20,703)
Foreign currency exchange rate fluctuations	0	0
Net carrying amount	$ 359	$ 647
Useful life	4 years
Backlog | Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Useful life		1 year
Backlog | Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Useful life		4 years
Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 7,650	$ 7,650
Accumulated amortization	(5,037)	(4,361)
Foreign currency exchange rate fluctuations	11	17
Net carrying amount	$ 2,624	$ 3,306
Trade names | Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Useful life	6 years	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	$ 3,217	$ 3,239
Accumulated amortization	(1,603)	(1,488)
Foreign currency exchange rate fluctuations	1	4
Net carrying amount	$ 1,615	$ 1,755
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		$ 1,900
Accumulated amortization		(1,900)
Foreign currency exchange rate fluctuations		0
Net carrying amount		$ 0
Useful life		3 years