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Commercial Mortgage Loans, Subordinate Loans and Other Lending Assets, Net - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended				6 Months Ended			12 Months Ended
	Jul. 30, 2025	Mar. 31, 2025	Jun. 30, 2025		Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2025		Jun. 30, 2024	Dec. 31, 2024		Feb. 28, 2025
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans on real estate, commercial and consumer, percentage of portfolio							100.00%			100.00%
Interest receivable			$ 74,886				$ 74,886			$ 58,470
Amortized cost of loans in cost recovery			366,900				366,900			486,800
Interest received for loans in cost recovery			400		$ 800		1,000		$ 1,400
Unfunded commitments			5,057				5,057			5,948
Mortgage loans on real estate, commercial and consumer, net			8,624,910				8,624,910			7,104,156
Note receivable, held for sale			39,964				39,964			41,200
Proceeds from pre-payment penalties or accelerated fees			400		700		400		800
Payment in kind interest			300		$ 0		300		0
Proceeds received from the repayment and sale of commercial mortgage loans							653,916		752,773
Promissory Note | Forecast
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan, mortgage, held-for-sale, price percentage	97.00%
Multifamily Property in Miami Gardens, Florida
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans on real estate, commercial and consumer, net												$ 114,000
Hotel - Honolulu, Hi
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan, mortgage, held-for-sale, price percentage					99.50%
Past Due 90
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost of loans in cost recovery			366,900				$ 366,900			486,800
Commercial Mortgage and Subordinated Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans on real estate, commercial and consumer, percentage of portfolio							2.70%
Unfunded commitments			36,700				$ 36,700
Mortgage loans on real estate, commercial and consumer, net			4,200				4,200			8,300
Modified receivables			235,200				235,200
Subordinate Mortgage Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans on real estate, commercial and consumer, net			$ 145,472	[1]			$ 145,472	[1]		$ 388,809	[1]	$ 24,000
Proceeds received from the repayment and sale of commercial mortgage loans		$ 24,000
Floating Rate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans on real estate, commercial and consumer, percentage of portfolio							96.00%			96.00%
Mortgage, Amortized cost | Hotel - Honolulu, Hi
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, gain (loss) on sales, net						$ (700)			$ (700)
[1] Net of $381,348 and $373,336 CECL Allowances comprised $38,848 and $30,836 General CECL Allowance in 2025 and 2024, respectively, and $342,500 Specific CECL Allowance in 2025 and 2024.

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