BORROWED FUNDS - Senior Notes (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2021	Dec. 31, 2023
Debt Instrument [Line Items]
Senior notes, net	$ 14,882,000		$ 14,882,000			$ 14,831,000
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		$ 15,000,000.0	$ 15,000,000
Stated interest rate	2.75%		2.75%		2.75%	2.75%
Debt issuance costs					$ 337,000
Senior notes, net	$ 14,882,000		$ 14,882,000		$ 14,663,000	$ 14,831,000
Amortization of debt issuance costs	$ 17,000	$ 16,000	$ 51,000	$ 49,000
Effective interest rate	3.23%		3.23%			3.23%