COMMERCIAL MORTGAGE LOANS HELD-FOR-INVESTMENT - Summary of Commercial Mortgage Loans (Details)		12 Months Ended
		Dec. 31, 2021 USD ($) mortgage_loan	Dec. 31, 2020 USD ($) mortgage_loan	Dec. 31, 2019 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
One Month LIBOR Rate (as a percent)		$ 0.0010	$ 0.0014
Weighted average LIBOR floor rate (as a percent)		0.0049	0.0164
Commercial mortgage loans held-for-investment, at amortized cost	[1]	1,001,825,294	547,345,334
Commercial Real Estate Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Principal Balance		1,001,869,994	547,345,334
Carrying Value		$ 1,001,825,294	$ 547,345,334
Loan Count | mortgage_loan		66	40
Weighted average, floating rate loan, percentage (as a percent)		100.00%	100.00%
Weighted average coupon rate, percentage (as a percent)		3.90%	5.10%
Weighted average, life (years)		3 years 8 months 12 days	3 years 1 month 6 days
Commercial mortgage loans held-for-investment, at amortized cost		$ 1,001,825,294	$ 547,345,334	$ 635,260,420
Outstanding senior secured loans from loan participants		27,800,000	15,981,933
Commercial Real Estate Portfolio Segment | Hunt CMT
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial mortgage loans held-for-investment, at amortized cost		$ 974,025,294	$ 531,363,401

[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.