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Fair Value Measurements Fair Value Measurements - Contingent Consideration (Details) - Discount rate
Sep. 30, 2021
Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Discount rate 0.0083 0.0060
Weighted Average    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Discount rate 0.0083 0.0060