COMMERCIAL MORTGAGE LOANS HELD-FOR-INVESTMENT - Additional Information (Details) $ in Millions			12 Months Ended
	Mar. 15, 2023 USD ($)	Feb. 27, 2023 USD ($)	Dec. 31, 2022 USD ($) loanParticipation
Financing Receivable, Recorded Investment [Line Items]
Reserve for impaired loan			$ 4.3
Office
Financing Receivable, Recorded Investment [Line Items]
Number of impaired office loans | loanParticipation			1
Impaired unpaid principal value			$ 10.3
Reserve for impaired loan			$ 4.3
Multifamily
Financing Receivable, Recorded Investment [Line Items]
Number of impaired office loans | loanParticipation			1
Subsequent Event
Financing Receivable, Recorded Investment [Line Items]
Sale of loans	$ 6.0
Subsequent Event | Office
Financing Receivable, Recorded Investment [Line Items]
Sale of loans		$ 6.0