Fair Value Measurements - Fair Value of Contingent Consideration by Acquisition (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration	$ 104,080	$ 89,850
Fair Value, Recurring
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration	115,573	103,818
Fair Value, Recurring | Level 3
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration	115,573	103,818
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	115,573	103,818
ImThera Medical, Inc. (“ImThera”) | Fair Value, Recurring | Level 3
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration	104,080	89,436
CardiacAssist, Inc., doing business as TandemLife (“TandemLife”) | Fair Value, Recurring | Level 3
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration	11,493	8,809
Miami Instruments | Fair Value, Recurring | Level 3
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration	$ 0	$ 5,573