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Notes Receivables - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Interest income recognized       $ 1,223
Notes Receivable [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Interest income recognized $ 0 $ 628 $ 0 $ 1,223
Notes Receivable on Nonaccrual Status     Effective January 1, 2020, notes receivable were placed on non-accrual status.