Goodwill and Intangible Assets (Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 100,089	[1]	$ 55,127	[1]
Accumulated Amortization	22,106		21,551
Net Carrying Amount	77,983		33,576
Trademarks and patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,583	[1]	1,046	[1]
Accumulated Amortization	432		364
Net Carrying Amount	2,151		682
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	46,481	[1]	33,942	[1]
Accumulated Amortization	15,639		15,958
Net Carrying Amount	30,842		17,984
Covenant not-to-compete [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	999	[1]	1,016	[1]
Accumulated Amortization	856		823
Net Carrying Amount	143		193
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	50,026	[1]	19,123	[1]
Accumulated Amortization	5,179		4,406
Net Carrying Amount	$ 44,847		$ 14,717

[1] Gross carrying amounts and accumulated amortization may differ from prior periods due to foreign exchange rate fluctuations.