Goodwill and Intangible Assets (Intangible Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 103,149	$ 101,158
Accumulated Amortization	34,063	30,442
Total intangible Assets, Gross Carrying Amount	107,650	105,461
Net Carrying Amount	69,086	70,716
Indefinite lived intangible assets	4,501	4,303
Total intangible assets, Net Carrying Amount	73,587	75,019
Trademarks and patents
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,562	2,543
Accumulated Amortization	819	718
Net Carrying Amount	1,743	1,825
Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	48,930	47,724
Accumulated Amortization	21,687	19,681
Net Carrying Amount	27,243	28,043
Covenant-not-to-compete
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	970	943
Accumulated Amortization	970	943
Net Carrying Amount	0	0
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	50,687	49,948
Accumulated Amortization	10,587	9,100
Net Carrying Amount	$ 40,100	$ 40,848