Goodwill and Intangible Assets - Intangible Assets, Net (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount		$ 110,851
Intangible Assets, Accumulated Amortization	$ (26,388)	(20,501)
Intangible Assets, Foreign Currency Exchange Rate Fluctuations	(629)	(685)
Total Intangibles Assets, Net Carrying Amount	202,361	89,665
Intangible Assets, Gross (Excluding Goodwill)	233,278
Intangible assets, net	206,261	89,665
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	126,338	69,554
Intangible Assets, Accumulated Amortization	(11,656)	(11,315)
Intangible Assets, Foreign Currency Exchange Rate Fluctuations	(818)	(719)
Total Intangibles Assets, Net Carrying Amount	113,864	57,520
Acquired technology
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	70,041	30,870
Intangible Assets, Accumulated Amortization	(7,850)	(6,088)
Intangible Assets, Foreign Currency Exchange Rate Fluctuations	173	59
Total Intangibles Assets, Net Carrying Amount	62,364	24,841
Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	8,542	8,052
Intangible Assets, Accumulated Amortization	(2,672)	(2,551)
Intangible Assets, Foreign Currency Exchange Rate Fluctuations	36	(14)
Total Intangibles Assets, Net Carrying Amount	5,906	5,487
Patents
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	2,042	1,960
Intangible Assets, Accumulated Amortization	(407)	(384)
Intangible Assets, Foreign Currency Exchange Rate Fluctuations	0	0
Total Intangibles Assets, Net Carrying Amount	1,635	1,576
Backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	20,615	415
Intangible Assets, Accumulated Amortization	(3,653)	(163)
Intangible Assets, Foreign Currency Exchange Rate Fluctuations	(20)	(11)
Total Intangibles Assets, Net Carrying Amount	16,942	$ 241
Useful Life (Years)		2 years
Non-compete agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	1,800
Intangible Assets, Accumulated Amortization	(150)
Total Intangibles Assets, Net Carrying Amount	$ 1,650
Useful Life (Years)	3 years
Minimum | Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	5 years	5 years
Minimum | Acquired technology
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	3 years	3 years
Minimum | Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	1 year	1 year
Minimum | Patents
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	2 years	2 years
Minimum | Backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	1 year
Maximum | Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	30 years	30 years
Maximum | Acquired technology
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	20 years	20 years
Maximum | Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	12 years	12 years
Maximum | Patents
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	20 years	20 years
Maximum | Backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	3 years
In-process Technology
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets (Excluding Goodwill)	$ 3,900