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Commitments and Contingencies - Additional Information (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Loss Contingencies    
Contingent consideration $ 10,132 $ 14,519
Acquisitions from 2014 through 2018    
Loss Contingencies    
Contingent consideration 18,400  
Construction Loans    
Loss Contingencies    
Total remaining draws on construction loans committed to fund $ 700,000 $ 400,000