COMMERCIAL MORTGAGE LOANS HELD-FOR-INVESTMENT Summary of Commercial Loan Risk Ratings (Details)		12 Months Ended
		Dec. 31, 2021 USD ($) mortgage_loan	Dec. 31, 2020 USD ($) mortgage_loan	Dec. 31, 2019 USD ($)
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	[1]	$ 1,001,825,294	$ 547,345,334
Average risk rate		2.3	3.1
Purchases and advances		$ 983,694,326	$ 57,601,572
Commercial Real Estate Portfolio Segment
Financing Receivable, Recorded Investment [Line Items]
Number of Loans | mortgage_loan		66	40
Unpaid Principal Balance		$ 1,001,869,994	$ 547,345,334
Loans held for investment		1,001,825,294	547,345,334	$ 635,260,420
Purchases and advances		$ 983,694,326	$ 57,601,572
Commercial Real Estate Portfolio Segment | Risk Rating, 1
Financing Receivable, Recorded Investment [Line Items]
Number of Loans | mortgage_loan		0	0
Unpaid Principal Balance		$ 0	$ 0
Loans held for investment		$ 0	$ 0
Commercial Real Estate Portfolio Segment | Risk Rating, 2
Financing Receivable, Recorded Investment [Line Items]
Number of Loans | mortgage_loan		40	14
Unpaid Principal Balance		$ 634,438,386	$ 168,401,366
Loans held for investment		634,438,386	$ 168,401,366
Commercial loans that paid off		133,600,000
Purchases and advances		$ 599,000,000
Commercial Real Estate Portfolio Segment | Risk Rating, 3
Financing Receivable, Recorded Investment [Line Items]
Number of Loans | mortgage_loan		23	20
Unpaid Principal Balance		$ 342,350,405	$ 309,726,343
Loans held for investment		$ 342,305,705	$ 309,726,343
Average risk rating, percentage		97.50%	84.40%
Commercial loans that paid off		$ 276,100,000
Purchases and advances		$ 283,000,000
Commercial Real Estate Portfolio Segment | Risk Rating, 4
Financing Receivable, Recorded Investment [Line Items]
Number of Loans | mortgage_loan		3	6
Unpaid Principal Balance		$ 25,081,203	$ 69,217,625
Loans held for investment		25,081,203	$ 69,217,625
Commercial loans that paid off		17,800,000
Purchases and advances		$ 100,000
Commercial Real Estate Portfolio Segment | Risk Rating, 5
Financing Receivable, Recorded Investment [Line Items]
Number of Loans | mortgage_loan		0	0
Unpaid Principal Balance		$ 0	$ 0
Loans held for investment		$ 0	$ 0

[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.