BORROWED FUNDS - Senior Notes (Details) - USD ($)	3 Months Ended	12 Months Ended
Mar. 31, 2023	Dec. 31, 2021	Dec. 31, 2022
Debt Instrument [Line Items]
Senior notes, net	$ 14,781,000		$ 14,765,000
Senior Notes with an aggregate par value of $15,000,000; bearing interest at 2.75% with an effective interest rate of 3.23%; maturing in June 2026
Debt Instrument [Line Items]
Aggregate par value	$ 15,000,000	$ 15,000,000.0	$ 15,000,000
Stated interest rate	2.75%	2.75%	2.75%
Debt issuance costs		$ 337,000
Senior notes, net	$ 14,781,000	$ 14,663,000	$ 14,765,000
Amortization of debt issuance costs	$ 16,000
Effective interest rate	3.23%		3.23%

Face (par) amount of debt instrument at time of issuance.

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