BUSINESS ACQUISITIONS - Narrative (Details) (USD $)	3 Months Ended		0 Months Ended			3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 05, 2014	Oct. 27, 2014	Jan. 15, 2014	Jun. 30, 2014
Business Acquisition [Line Items]
Impairment of intangible assets	$ 409,000	$ 600,000
Metasurg
Business Acquisition [Line Items]
Consideration for acquisition			27,200,000
Payments for acquisition			26,500,000
Contingent consideration acquisition			700,000
Business acquisition, additional cash consideration payable upon completion of milestones			38,500,000
Fair value inputs, discount rate			19.90%
Revenue of acquired company since acquisition	1,600,000
Net assets acquired	27,150,000
Medtronic MicroFrance
Business Acquisition [Line Items]
Payments for acquisition				60,100,000
Revenue of acquired company since acquisition	5,800,000
Adjustment of consideration for acquisition	(1,500,000)			1,500,000
Adjustment to goodwill				800,000
Net assets acquired	60,067,000
Confluent Surgical, Inc.
Business Acquisition [Line Items]
Contingent consideration acquisition					20,900,000
Business acquisition, additional cash consideration payable upon completion of milestones					30,000,000
Fair value inputs, discount rate					2.20%
Revenue of acquired company since acquisition	17,700,000	14,100,000
Net assets acquired	255,895,000				255,895,000
Payments to acquire business interest					231,000,000
Payments for transitional supply agreements from acquisition					4,000,000
Contingent liability extension period					2 years
Consideration liability, number of required days for extension					180 days
Contingent liability, period of consideration arrangement					5 years
Contingent liability, period of transitional supply price increases					3 years
Impairment of intangible assets	600,000
Fair value input, probability of event					95.00%
Incremental increase in contingent liability					300,000
Incremental decrease in contingent liability					400,000
Confluent Surgical, Inc. | Potential Cash Consideration Fair Value
Business Acquisition [Line Items]
Business acquisition, additional cash consideration payable upon completion of milestones					25,000,000
Confluent Surgical, Inc. | Cash Consideration Two
Business Acquisition [Line Items]
Business acquisition, additional cash consideration payable upon completion of milestones					5,000,000
Deferred Tax Liability | Confluent Surgical, Inc.
Business Acquisition [Line Items]
MicroFrance working capital and purchase price adjustments						$ 12,400,000