COMMITMENTS AND CONTINGENCIES - Schedule of unfunded loan commitments (Details) - Unfunded Loan Commitment - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Unfunded Loan Commitments [Roll Forward]
Beginning balance	$ 2,178	$ 419
Release of provision for credit losses	(627)	(1,722)
Ending balance	$ 1,551	2,178
Impact of adopting ASU 2016-13
Unfunded Loan Commitments [Roll Forward]
Beginning balance		$ 3,481