Goodwill and Intangible Assets - Intangible Assets, Net (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Acquired Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	$ (60,232)	$ (54,059)
Foreign currency exchange rate fluctuations	217	(786)
Total intangibles assets, gross carrying amount	244,142	245,128
Total intangible assets, net carrying amount	184,127	190,283
In-process technology
Acquired Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	0	0
Foreign currency exchange rate fluctuations	0	0
Indefinite-lived intangible assets	3,900	3,900
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	132,579	133,358
Accumulated amortization	(23,974)	(20,930)
Foreign currency exchange rate fluctuations	143	(596)
Net carrying amount	$ 108,748	$ 111,832
Customer relationships | Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	1 year	1 year
Customer relationships | Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	30 years	30 years
Acquired technology
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 73,409	$ 73,599
Accumulated amortization	(15,264)	(13,287)
Foreign currency exchange rate fluctuations	28	(159)
Net carrying amount	$ 58,173	$ 60,153
Acquired technology | Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	3 years	3 years
Acquired technology | Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	20 years	20 years
Backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 20,533	$ 20,550
Accumulated amortization	(14,875)	(14,083)
Foreign currency exchange rate fluctuations	0	0
Net carrying amount	$ 5,658	$ 6,467
Backlog | Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	1 year	1 year
Backlog | Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	3 years	3 years
Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 8,607	$ 8,667
Accumulated amortization	(4,063)	(3,887)
Foreign currency exchange rate fluctuations	5	(31)
Net carrying amount	$ 4,549	$ 4,749
Trade names | Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	1 year	1 year
Trade names | Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	12 years	12 years
Patents
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 3,214	$ 3,154
Accumulated amortization	(1,273)	(1,264)
Foreign currency exchange rate fluctuations	41	0
Net carrying amount	$ 1,982	$ 1,890
Patents | Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	2 years	2 years
Patents | Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	20 years	20 years
Non-compete agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 1,900	$ 1,900
Accumulated amortization	(783)	(608)
Foreign currency exchange rate fluctuations	0	0
Net carrying amount	$ 1,117	$ 1,292
Useful Life (Years)	3 years	3 years