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BUSINESS ACQUISITIONS - Narrative (Details) - USD ($) $ in Thousands |  |  |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | --- | --- | ---
Dec. 05, 2014 | Oct. 27, 2014 | Jan. 15, 2014 | Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Business Acquisition [Line Items] |  |  |  |  |  |  |
Impairment of intangible assets |  |  |  |  |  | $ 409 | $ 600
Metasurg |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Consideration for acquisition | $ 27,600 |  |  |  |  |  |
Adjustment of consideration for acquisition | 400 |  |  |  |  | 400 |
Payments for acquisition | 26,500 |  |  |  |  |  |
Contingent consideration acquisition | 700 |  |  |  |  |  |
Business acquisition, additional cash consideration payable upon completion of milestones | $ 38,500 |  |  |  |  |  |
Fair value inputs, discount rate | 19.90% |  |  |  |  |  |
Revenue of acquired company since acquisition |  |  |  | $ 1,700 |  | 3,300 |
Net assets acquired |  |  |  | 27,558 |  | 27,558 |
Medtronic MicroFrance |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Adjustment of consideration for acquisition |  | $ (1,500) |  |  |  | 1,500 |
Payments for acquisition |  | 60,100 |  |  |  |  |
Revenue of acquired company since acquisition |  |  |  | 6,300 |  | 12,100 |
Adjustment to goodwill |  | $ 800 |  |  |  |  |
Net assets acquired |  |  |  | 60,067 |  | 60,067 |
Confluent Surgical, Inc. |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Contingent consideration acquisition |  |  | $ 20,900 |  |  |  |
Business acquisition, additional cash consideration payable upon completion of milestones |  |  | $ 30,000 |  |  |  |
Fair value inputs, discount rate |  |  | 2.20% |  |  |  |
Revenue of acquired company since acquisition |  |  |  | 18,900 | $ 14,100 | 36,600 | $ 32,400
Net assets acquired |  |  | $ 255,895 | $ 255,895 |  | 255,895 |
Payments to acquire business interest |  |  | 231,000 |  |  |  |
Payments for transitional supply agreements from acquisition |  |  | $ 4,000 |  |  |  |
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 |
Fair value input, probability of event |  |  | 95.00% |  |  |  |
Incremental increase in contingent liability |  |  | $ 300 |  |  |  |
Incremental decrease in contingent liability |  |  | 400 |  |  |  |
Confluent Surgical, Inc. | Potential Cash Consideration Fair Value |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Business acquisition, additional cash consideration payable upon completion of milestones |  |  | 25,000 |  |  |  |
Confluent Surgical, Inc. | Cash Consideration Two |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Business acquisition, additional cash consideration payable upon completion of milestones |  |  | $ 5,000 |  |  |  |
Deferred Tax Liability | Confluent Surgical, Inc. |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Working capital and purchase price adjustment |  |  |  |  | $ 12,400 |  |

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