Business Combinations - Additional Information (Details) - USD ($) $ in Thousands					4 Months Ended	12 Months Ended
	Apr. 30, 2015	Apr. 30, 2015	Apr. 21, 2015	Aug. 22, 2014	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Apr. 29, 2014
Acquired Finite-Lived Intangible Assets [Line Items]
Total purchase price	$ 41,427	$ 41,427
Difference between fair value and carrying value as a gain						$ 3,443	$ 0	$ 0
Purchase price of acquisition	37,638					25,507	20,723	0
Goodwill	26,197	26,197			$ 122,720	147,906	122,720	111,343
Avantec
Acquired Finite-Lived Intangible Assets [Line Items]
Percentage of minority interest									15.00%
Carrying book value of previous equity interest	1,300	1,300
Surgichem
Acquired Finite-Lived Intangible Assets [Line Items]
Total purchase price				$ 20,877
Purchase price of acquisition				20,700
Cash acquired from Acquisition				200
Goodwill				12,112
Acquisition generated revenue					4,600
Income (Loss) from operations					$ (100)
Total revenue							$ 13,300	$ 11,900
Surgichem | Trade name
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired				$ 300
Acquired intangible assets, useful life (in years)				1 year
Surgichem | Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired				$ 5,400
Acquired intangible assets, useful life (in years)				18 years
Mach4
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value of identifiable intangible assets purchased			$ 7,710
Total purchase price			17,286
Amount placed in escrow fund for business acquisition			$ 2,700
Period after closing date to settle indemnification and other claims			18 months
Purchase price of acquisition			$ 16,889
Goodwill			10,591
Acquisition generated revenue						11,200
Income (Loss) from operations						(2,200)
Mach4 | Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value of identifiable intangible assets purchased			$ 3,290
Acquired intangible assets, useful life (in years)			8 years
Mach4 | Trade name
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value of identifiable intangible assets purchased			$ 850
Acquired intangible assets, useful life (in years)			6 years
Mach4 | Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value of identifiable intangible assets purchased			$ 3,570
Acquired intangible assets, useful life (in years)			10 years
Avantec
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value of identifiable intangible assets purchased		6,341
Total purchase price	$ 24,141	$ 24,141
Percentage of interest acquired	85.00%	85.00%
Payments to acquire business, in cash		$ 12,000
Potential earn-out payments	$ 5,600	5,600
Business acquisition, amount withheld for idemnification	1,800	$ 1,800
Period after closing date to settle indemnification and other claims		18 months
Fair value of equity investment		$ 4,700
Difference between fair value and carrying value as a gain		3,400
Purchase price of acquisition		20,749
Goodwill	15,606	15,606
Acquisition generated revenue						8,700
Income (Loss) from operations						$ (900)
Avantec | Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value of identifiable intangible assets purchased		0
Avantec | Trade name
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value of identifiable intangible assets purchased		$ 92
Acquired intangible assets, useful life (in years)		2 years
Avantec | Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value of identifiable intangible assets purchased		$ 5,834
Acquired intangible assets, useful life (in years)		12 years
Avantec | Payable After December 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Potential earn-out payments	3,000	$ 3,000
Avantec | Payable After December 31, 2016
Acquired Finite-Lived Intangible Assets [Line Items]
Potential earn-out payments	$ 3,000	$ 3,000