COMMERCIAL MORTGAGE LOANS HELD-FOR-INVESTMENT - Summary of Commercial Loan Risk Ratings (Details)		6 Months Ended	12 Months Ended
		Jun. 30, 2025 USD ($) mortgageLoan	Dec. 31, 2024 USD ($) mortgageLoan
Financing Receivable, Credit Quality Indicator [Line Items]
Outstanding Principal	[1]	$ 919,672,180	$ 1,060,123,298
Average risk rating, moderate		3.5	3.5
Commercial Real Estate Portfolio Segment
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Loans | mortgageLoan		56	65
Outstanding Principal		$ 924,227,644	$ 1,065,563,646
Year 1		3,574,551	58,068,230
Year 2		58,103,598	17,973,555
Year 3		17,931,720	511,654,760
Year 4		423,636,921	$ 461,106,533
Year 5		$ 402,173,122
Commercial Real Estate Portfolio Segment | Risk rating, 1
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Loans | mortgageLoan		0	0
Outstanding Principal		$ 0	$ 0
Year 1		0	0
Year 2		0	0
Year 3		0	0
Year 4		0	$ 0
Year 5		$ 0
Commercial Real Estate Portfolio Segment | Risk rating, 2
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Loans | mortgageLoan		6	3
Outstanding Principal		$ 80,365,000	$ 57,840,000
Year 1		3,574,551	27,048,495
Year 2		27,056,641	0
Year 3		0	30,416,761
Year 4		49,470,843	$ 0
Year 5		0
Commercial loans that paid off		3,600,000
Transition of commercial loans held for sale to a lower risk rating		$ 18,900,000
Commercial Real Estate Portfolio Segment | Risk rating, 3
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Loans | mortgageLoan		28	40
Outstanding Principal		$ 495,516,994	$ 616,637,103
Year 1		0	31,019,735
Year 2		31,046,957	17,973,555
Year 3		17,931,720	266,895,843
Year 4		178,773,996	$ 294,277,177
Year 5		$ 262,310,309
Average risk rating, percentage		63.00%	63.70%
Commercial loans that paid off		$ 94,600,000
Transition of commercial loans held for sale to a lower risk rating		$ 88,100,000
Commercial Real Estate Portfolio Segment | Risk rating, 4
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Loans | mortgageLoan		14	16
Outstanding Principal		$ 224,238,863	$ 292,826,616
Year 1		0	0
Year 2		0	0
Year 3		0	140,183,307
Year 4		159,662,031	$ 147,641,857
Year 5		59,283,424
Commercial loans that paid off		21,500,000
Transition of commercial loans held for sale to a higher risk rating		75,900,000
Transition of commercial loans held for sale to a lower risk rating		$ 21,100,000
Commercial Real Estate Portfolio Segment | Risk rating, 5
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Loans | mortgageLoan		8	6
Outstanding Principal		$ 124,106,787	$ 98,259,927
Year 1		0	0
Year 2		0	0
Year 3		0	74,158,849
Year 4		35,730,051	$ 19,187,499
Year 5		80,579,389
Commercial loans that paid off		2,000,000
Transition of commercial loans held for sale to a higher risk rating		44,600,000
Transition of commercial loans held for sale to a risk rating two steps higher		$ 49,400,000

[1] Our consolidated balance sheets include assets and liabilities of consolidated variable interest entities ("VIEs") as the Company was the primary beneficiary of these VIEs. As of June 30, 2025 and December 31, 2024, assets of consolidated VIEs totaled $934,090,475 and $1,058,138,406, respectively and the liabilities of consolidated VIEs totaled $712,768,638 and $831,001,605 respectively. See Note 4 for further discussion.