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Fair Value Measurements - Fair Value of Contingent Consideration by Acquisition (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration	$ 89,847	$ 89,850
Fair Value, Recurring
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration	99,271	103,818
Fair Value, Recurring | Level 3
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration	99,271	103,818
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	99,271	103,818
ImThera Medical, Inc. (“ImThera”) | Fair Value, Recurring | Level 3
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration	89,426	89,436
CardiacAssist, Inc., doing business as TandemLife (“TandemLife”) | Fair Value, Recurring | Level 3
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration	8,942	8,809
Miami Instruments | Fair Value, Recurring | Level 3
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration	$ 903	$ 5,573

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Amount of liability recognized arising from contingent consideration in a business combination.

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Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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