COMMERCIAL MORTGAGE LOANS HELD-FOR-INVESTMENT - Summary of Commercial Mortgage Loans (Details)		3 Months Ended	12 Months Ended
		Mar. 31, 2022 USD ($) mortgage_loan	Dec. 31, 2021 USD ($) mortgage_loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Floating Rate Loan			100.00%
One month LIBOR rate		$ 0.0029	$ 0.0010
One month SOFR rate		0.24%	0.00%
Weighted average LIBOR floor rate		$ 0.0027	$ 0.0049
Weighted average floating rate		93.90%
Weighted average SOFR rate		6.10%
Commercial mortgage loans held-for-investment, at amortized cost	[1]	$ 1,077,516,319	1,001,825,294
Commercial real estate portfolio segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Principal Balance		1,077,505,797	1,001,869,994
Carrying Value		$ 1,077,516,319	$ 1,001,825,294
Loan Count | mortgage_loan		71	66
Floating Rate Loan		100.00%	100.00%
Coupon		3.80%	3.90%
Term (Years)		3 years 10 months 24 days	3 years 8 months 12 days
Commercial mortgage loans held-for-investment, at amortized cost		$ 1,077,516,319	$ 1,001,825,294
Outstanding senior secured loans from loan participations		78,848,530	27,800,000
Commercial real estate portfolio segment | Hunt CMT
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial mortgage loans held-for-investment, at amortized cost		$ 998,667,789	$ 974,025,294

[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 March 31, 2022 and December 31, 2021, assets of consolidated VIEs totaled $1,002,685,982 and $1,003,896,995, respectively and the liabilities of consolidated VIEs totaled $828,126,768 and $827,390,435 respectively. See Note 4 for further discussion.