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Acquisitions - Schedule of Contingent and Non-Contingent Consideration Fair Value (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Business Acquisition, Contingent Consideration [Line Items]    
Accruals and other current liabilities $ 2,884 $ 5,100
Accruals and other current liabilities 685 900
Series of Individually Immaterial Business Acquisitions    
Business Acquisition, Contingent Consideration [Line Items]    
Accruals and other current liabilities 2,884 5,100
Other liabilities 1,415 1,499
Contingent consideration from acquisitions 4,299 6,599
Accruals and other current liabilities 685 900
Other liabilities 1,774 0
Non-contingent consideration from acquisitions $ 2,459 $ 900