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Financial Instruments - Changes in Fair Value of Liability for Contingent Consideration (Details) - Contingent Consideration - Level 3
$ in Thousands
3 Months Ended
Mar. 31, 2021
USD ($)
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]  
Liability at beginning of the period $ 22,559
Increase (decrease) in fair value of liability for contingent consideration 581
Liability at end of the period $ 23,140