COMMERCIAL MORTGAGE LOANS HELD-FOR-INVESTMENT - Loan Portfolio Activity (Details) - USD ($)		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	[1]	$ 547,345,334
Purchases and advances		983,694,326	$ 57,601,572
Principal payments		(506,402,705)	(145,516,658)
Accretion of purchase discount		46,088	0
Amortization of purchase premium		(457,749)	0
Ending Balance	[1]	1,001,825,294	547,345,334
Commercial Real Estate Portfolio Segment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance		547,345,334	635,260,420
Purchases and advances		983,694,326	57,601,572
Principal payments		(528,802,705)	(145,516,658)
Accretion of purchase discount		46,088
Amortization of purchase premium		(457,749)
Ending Balance		$ 1,001,825,294	$ 547,345,334

[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 December 31, 2021 and December 31, 2020, assets of the consolidated VIEs totaled $1,003,896,995 and $591,318,506, respectively and the liabilities of consolidated VIEs totaled $827,390,435 and $463,411,967, respectively.