Collateralized Loan Obligations - Schedule of Assets and Liabilities Included in Consolidated Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2022
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Commercial real estate loans, held-for-investment	$ 6,188,679	$ 7,343,548
Less: Allowance for credit losses	(148,013)	(210,470)	$ (218,992)	$ (106,974)
Commercial real estate loans, held-for-investment, net	6,040,666	7,133,078
Commercial real estate loan, held-for-sale	137,916	0
Accrued interest receivable	32,282	41,003
Other assets	17,601	19,455
Total Assets	6,774,042	7,547,618
Collateralized loan obligations	3,024,534
Deferred financing costs	(3,020)	(3,747)
Collateralized loan obligations, net	1,941,128	1,942,171
Accrued interest payable	22,763	20,207
Total Liabilities	5,362,661	6,143,436
Recurring
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Commercial real estate loans, held-for-investment		7,343,548
Commercial real estate loans, held-for-investment, net		7,133,078
Total Assets	6,287,377	7,268,976
Total Liabilities	5,292,885	6,059,921
Recurring | Collateralized loan obligations, net
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Collateralized loan obligations	1,941,330	1,942,750
Collateralized loan obligations | Primary beneficiary
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Cash	0	5,000
Commercial real estate loans, held-for-investment	2,257,907	2,295,000
Less: Allowance for credit losses	(17,234)	(21,216)
Commercial real estate loans, held-for-investment, net	2,240,673	2,273,784
Commercial real estate loan, held-for-sale	34,500	0
Accrued interest receivable	11,079	12,653
Other assets	6,328	155
Total Assets	2,292,580	2,291,592
Deferred financing costs	(202)	(579)
Collateralized loan obligations, net	1,941,128	1,942,171
Accrued interest payable	4,649	5,666
Total Liabilities	$ 1,945,777	$ 1,947,837