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Fair Value Measurements - Fair Value of Contingent Consideration by Acquisition (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Business Acquisition, Contingent Consideration [Line Items]    
Contingent consideration $ 79,603 $ 114,396
Fair Value, Recurring    
Business Acquisition, Contingent Consideration [Line Items]    
Contingent consideration 96,174 137,349
Fair Value, Recurring | Level 3    
Business Acquisition, Contingent Consideration [Line Items]    
Contingent consideration 96,174 137,349
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value 96,174 137,349
ImThera | Fair Value, Recurring | Level 3    
Business Acquisition, Contingent Consideration [Line Items]    
Contingent consideration 79,603 113,503
TandemLife | Fair Value, Recurring | Level 3    
Business Acquisition, Contingent Consideration [Line Items]    
Contingent consideration 11,672 17,311
Miami Instruments | Fair Value, Recurring | Level 3    
Business Acquisition, Contingent Consideration [Line Items]    
Contingent consideration 4,899 5,338
Drilltex | Fair Value, Recurring | Level 3    
Business Acquisition, Contingent Consideration [Line Items]    
Contingent consideration 0 294
Other | Fair Value, Recurring | Level 3    
Business Acquisition, Contingent Consideration [Line Items]    
Contingent consideration $ 0 $ 903