Other Assets and Liabilities - Summary of Components of Other Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Related Party Transaction [Line Items]
Accrued dividends payable	$ 106,832	$ 106,455
Accrued interest payable	72,594	80,263
Secured debt repayments pending servicer remittance	36,815	60,585
Derivative liabilities	19,962	119,665
Current expected credit loss reserve for unfunded loan commitments	16,272	16,380
Accounts payable and other liabilities	8,717	9,726
Other liabilities	294,007	426,904
Related Party
Related Party Transaction [Line Items]
Accrued management and incentive fees payable	$ 32,815	$ 33,830