Other Assets and Liabilities - Summary of Components of Other Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Related Party Transaction [Line Items]
Accrued dividends payable	$ 107,390	$ 106,455
Accrued interest payable	97,820	80,263
Derivative liabilities	94,817	119,665
Current expected credit loss reserves for unfunded loan commitments	15,371	16,380
Secured debt repayments pending servicer remittance	13,526	60,585
Accounts payable and other liabilities	7,265	9,726
Other liabilities	362,531	426,904
Related Party
Related Party Transaction [Line Items]
Accrued management and incentive fees payable	$ 26,342	$ 33,830