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Fair Value Measurement - Fair Value of Our Contingent Consideration (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2021
USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]  
Contingent consideration liability beginning balance $ 8,800
Change in fair value 488
Payments (5,000)
Contingent consideration liability ending balance $ 4,288