Other Assets and Liabilities - Summary of Components of Other Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023
Other Assets And Liabilities Disclosure [Abstract]
Accrued dividends payable	$ 107,644	$ 107,390	$ 106,832
Accrued interest payable	90,223	97,820
Derivative liabilities	24,395	94,817
Accrued management and incentive fees payable	18,726	26,342
Current expected credit loss reserves for unfunded loan commitments	9,946	15,371	$ 16,300
Accounts payable and other liabilities	6,365	7,265
Secured debt repayments pending servicer remittance	0	13,526
Other liabilities	$ 257,299	$ 362,531