Acquisitions - Purchase Price Allocation (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Oct. 04, 2013 Radial Assist	Oct. 04, 2013 Datascope	Oct. 04, 2013 Developed technology Radial Assist	Oct. 04, 2013 Developed technology Datascope	Oct. 04, 2013 Customer lists Radial Assist	Oct. 04, 2013 Customer lists Datascope	Oct. 04, 2013 Trademarks Radial Assist	Oct. 04, 2013 Trademarks Datascope
Business Acquisition [Line Items]
Inventories			$ 16	$ 478
Intangibles					1,520	18,200	20	390	40	320
Goodwill	184,505	184,505	904	8,112
Total assets acquired			$ 2,500	$ 27,500