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Commitments and Contingencies - Additional Information (Detail) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Loss Contingencies    
Financial guarantee liability $ 13,916 $ 14,519
Acquisitions from 2014 through 2018    
Loss Contingencies    
Financial guarantee liability 19,200  
Construction Loans    
Loss Contingencies    
Total remaining draws on construction loans committed to fund $ 400,000 $ 400,000