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Fair Value Measurements - Schedule of Changes in Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Contingently Returnable Consideration    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at beginning of period $ 70  
Change in fair value of contingent consideration 188  
Balance at end of period 258  
Contingent Earnout Liability    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at beginning of period 48,769 $ 9,249
Change in fair value of contingent consideration 1,849 (2,786)
Balance at end of period 53,855 6,463
Contingent Earnout Liability | Business Combinations    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair value of contingent consideration recorded $ 3,237 $ 0