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Assets and Liabilities Measured at Fair Value - Additional Information (Details)
$ in Thousands
6 Months Ended
Jun. 30, 2022
USD ($)
Investment
Jun. 30, 2021
Investment
Dec. 31, 2021
USD ($)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Number of investments transferred from level 3 to level 2 | Investment 3 3  
Number of investments transferred from level 2 to 3 | Investment 19 1  
Mortgage loans | $ $ 47,547   $ 47,487
Second and Mezzanine Mortgages      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Mortgage loans | $ $ 1,952   $ 2,398