Goodwill and Intangible Assets - Intangible Assets, Net (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	$ 110,990	$ 96,495
Intangible Assets, Accumulated Amortization	(18,587)	(13,488)
Intangible Assets, Foreign Currency Exchange Rate Fluctuations	(361)	(340)
Total Intangibles Assets, Net Carrying Amount	92,042	82,667
Customer relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	69,520	60,150
Intangible Assets, Accumulated Amortization	(10,317)	(7,596)
Intangible Assets, Foreign Currency Exchange Rate Fluctuations	(355)	(323)
Total Intangibles Assets, Net Carrying Amount	58,848	52,231
Acquired technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	30,991	27,580
Intangible Assets, Accumulated Amortization	(5,534)	(4,068)
Intangible Assets, Foreign Currency Exchange Rate Fluctuations	14	0
Total Intangibles Assets, Net Carrying Amount	25,471	23,512
Trade names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	8,069	7,110
Intangible Assets, Accumulated Amortization	(2,289)	(1,559)
Intangible Assets, Foreign Currency Exchange Rate Fluctuations	(6)	(17)
Total Intangibles Assets, Net Carrying Amount	5,774	5,534
Patents [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	1,986	1,655
Intangible Assets, Accumulated Amortization	(342)	(265)
Intangible Assets, Foreign Currency Exchange Rate Fluctuations	0	0
Total Intangibles Assets, Net Carrying Amount	1,644	$ 1,390
Backlog [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	424
Intangible Assets, Accumulated Amortization	(105)
Intangible Assets, Foreign Currency Exchange Rate Fluctuations	(14)
Total Intangibles Assets, Net Carrying Amount	$ 305
Useful Life (Years)	1 year 8 months 12 days
Maximum [Member] | Customer relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	30 years	30 years
Maximum [Member] | Acquired technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	20 years	20 years
Maximum [Member] | Trade names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	12 years	12 years
Maximum [Member] | Patents [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	20 years	20 years
Minimum [Member] | Customer relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	5 years	5 years
Minimum [Member] | Acquired technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	3 years	3 years
Minimum [Member] | Trade names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	1 year	3 years
Minimum [Member] | Patents [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	2 years	2 years