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COMMERCIAL MORTGAGE LOANS HELD-FOR-INVESTMENT - Additional Information (Details)	1 Months Ended	12 Months Ended
	Mar. 31, 2025 USD ($)	Dec. 31, 2025 USD ($) loan	Dec. 31, 2024 USD ($) loan contract	Sep. 30, 2025 USD ($) subsidiary loan	Jun. 30, 2025 USD ($) subsidiary
Financing Receivable, Allowance for Credit Loss [Line Items]
Average risk rate		3.2	3.5
Increase in allowance for credit loss		$ 11,300,000
CECL reserve		$ 22,658,121	$ 11,377,774
Minimum
Financing Receivable, Allowance for Credit Loss [Line Items]
Capitalization rate assumption percentage		5.50%
Maximum
Financing Receivable, Allowance for Credit Loss [Line Items]
Capitalization rate assumption percentage		8.60%
Risk Rating, 5
Financing Receivable, Allowance for Credit Loss [Line Items]
Unpaid principal balance of default risk loans		$ 117,400,000
Amortized cost of default risk loans		98,200,000
Fair value of default risk loans		98,700,000
Risk Rating, 5 \| Dallas, TX
Financing Receivable, Allowance for Credit Loss [Line Items]
Outstanding principal balance	$ 31,900,000
Principal payment amount	$ 2,000,000.0
Term extension period	2 years
Risk Rating, 5 \| Dallas, TX \| Minimum
Financing Receivable, Allowance for Credit Loss [Line Items]
Credit spread percentage	3.40%
Risk Rating, 5 \| Dallas, TX \| Maximum
Financing Receivable, Allowance for Credit Loss [Line Items]
Credit spread percentage	3.90%
Commercial Real Estate Portfolio Segment \| Multifamily
Financing Receivable, Allowance for Credit Loss [Line Items]
Commercial loans, specific allowance		17,600,000	3,800,000
Interest received		$ 800,000	$ 800,000
Commercial Real Estate Portfolio Segment \| Risk Rating, 3
Financing Receivable, Allowance for Credit Loss [Line Items]
Average risk rating, percentage		81.60%	63.70%
Commercial loans that paid off		$ 208,200,000
Commercial loans funded		306,800,000
Transition of commercial loans held for sale to a lower risk rating		114,500,000
Transition of commercial loans held for sale to a risk rating two steps lower		49,200,000
Commercial loans held for sale foreclosed and moved to REO		35,700,000
Commercial Real Estate Portfolio Segment \| Risk Rating, 2
Financing Receivable, Allowance for Credit Loss [Line Items]
Commercial loans that paid off		27,100,000
Commercial loans funded		96,100,000
Transition of commercial loans held for sale to a lower risk rating		34,300,000
Commercial Real Estate Portfolio Segment \| Risk Rating, 4
Financing Receivable, Allowance for Credit Loss [Line Items]
Commercial loans that paid off		23,200,000
Transition of commercial loans held for sale to a higher risk rating		42,900,000
Commercial loans held for sale foreclosed and moved to REO		11,500,000
Commercial Real Estate Portfolio Segment \| Risk Rating, 5
Financing Receivable, Allowance for Credit Loss [Line Items]
Commercial loans that paid off		8,100,000
Commercial loans funded		900,000
Transition of commercial loans held for sale to a higher risk rating		77,200,000
Transition of commercial loans held for sale to a risk rating two steps higher		13,700,000
Commercial loans held for sale foreclosed and moved to REO		15,400,000
Commercial Real Estate Portfolio Segment \| Risk Rating, 5 \| Multifamily
Financing Receivable, Allowance for Credit Loss [Line Items]
Interest received		300,000
Commercial Real Estate Portfolio Segment \| Risk Rating, 5 \| Philadelphia, PA \| Multifamily
Financing Receivable, Allowance for Credit Loss [Line Items]
Commercial loans, specific allowance		$ 1,300,000
Number of loans collateralized \| loan		1
Number of impaired office loans \| loan		2
Commercial loans, held-for-investment, unpaid principal value		$ 15,500,000
Commercial Real Estate Portfolio Segment \| Risk Rating, 5 \| Arlington, TX \| Multifamily
Financing Receivable, Allowance for Credit Loss [Line Items]
Commercial loans, specific allowance		$ 3,600,000
Number of loans collateralized \| loan		2
Number of impaired office loans \| loan		2
Commercial Real Estate Portfolio Segment \| Risk Rating, 5 \| Cedar Park, TX \| Multifamily
Financing Receivable, Allowance for Credit Loss [Line Items]
Commercial loans, specific allowance		$ 0
Commercial loans, held-for-investment, unpaid principal value		35,500,000
Commercial Real Estate Portfolio Segment \| Risk Level, Monetary Default Default Risk \| Philadelphia, PA \| Multifamily
Financing Receivable, Allowance for Credit Loss [Line Items]
Commercial loans, specific allowance			$ 100,000
Number of loans collateralized \| loan			3
Number of impaired office loans \| loan			4
Commercial Real Estate Portfolio Segment \| Risk Level, Monetary Default Default Risk \| Colorado Springs, CO \| Multifamily
Financing Receivable, Allowance for Credit Loss [Line Items]
Commercial loans, specific allowance		$ 2,400,000	$ 1,100,000
Number of loans collateralized \| loan		1
Commercial loans, held-for-investment, unpaid principal value		$ 10,500,000	45,100,000
Commercial Real Estate Portfolio Segment \| Risk Level, Monetary Default Default Risk \| Des Moines, IA \| Multifamily
Financing Receivable, Allowance for Credit Loss [Line Items]
Commercial loans, specific allowance		$ 500,000
Number of loans collateralized \| loan		4
Number of impaired office loans \| loan		4
Commercial Real Estate Portfolio Segment \| Risk Level, Monetary Default Default Risk \| Tampa, FL \| Multifamily
Financing Receivable, Allowance for Credit Loss [Line Items]
Commercial loans, specific allowance		$ 900,000
Commercial Real Estate Portfolio Segment \| Risk Level, Monetary Default Default Risk \| Tallahassee, FL \| Multifamily
Financing Receivable, Allowance for Credit Loss [Line Items]
Commercial loans, specific allowance		3,000,000.0
Commercial Real Estate Portfolio Segment \| Risk Level, Monetary Default Default Risk \| Ypsilanti, MI \| Multifamily
Financing Receivable, Allowance for Credit Loss [Line Items]
Commercial loans, specific allowance		5,900,000
Commercial loans, held-for-investment, unpaid principal value		$ 55,800,000
Commercial Real Estate Portfolio Segment \| Risk Level, Monetary Default Default Risk \| Orlando, FL \| Multifamily
Financing Receivable, Allowance for Credit Loss [Line Items]
Commercial loans, specific allowance			400,000
Commercial Real Estate Portfolio Segment \| Risk Level, Monetary Default Default Risk \| Polk Country, FL \| Multifamily
Financing Receivable, Allowance for Credit Loss [Line Items]
Commercial loans, specific allowance			$ 600,000
Number of loans collateralized \| loan			1
Commercial loans, held-for-investment, unpaid principal value			$ 6,100,000
Number of health properties \| contract			2
Commercial Real Estate Portfolio Segment \| Risk Level, Monetary Default Default Risk \| Dallas, TX \| Multifamily
Financing Receivable, Allowance for Credit Loss [Line Items]
Commercial loans, specific allowance			$ 0
Number of loans collateralized \| loan			2
Number of impaired office loans \| loan			2
Commercial Real Estate Portfolio Segment \| Risk Level, Monetary Default Default Risk \| San Antonio, TX \| Multifamily
Financing Receivable, Allowance for Credit Loss [Line Items]
Commercial loans, specific allowance			$ 1,600,000	$ 200,000	$ 2,400,000
Number of loans collateralized \| loan				2
Number of impaired office loans \| loan				2
Commercial loans, held-for-investment, unpaid principal value			$ 47,000,000.0	$ 35,700,000	15,400,000
Number of subsidiaries formed \| subsidiary				2
Commercial Real Estate Portfolio Segment \| Risk Level, Monetary Default Default Risk \| Houston, TX \| Multifamily
Financing Receivable, Allowance for Credit Loss [Line Items]
Commercial loans, specific allowance					500,000
Commercial loans, held-for-investment, unpaid principal value					$ 11,500,000
Number of subsidiaries formed \| subsidiary					2