FAIR VALUE - Narrative (Details)	3 Months Ended		6 Months Ended		9 Months Ended
	Jun. 30, 2024 USD ($) loan	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) loan	Jun. 30, 2023 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) loan
Summary of assets measured on a recurring and nonrecurring basis
Transfer of loans held for investment to loans held for sale					$ 39,200,000
Value of loans sold						$ 40,800,000
Number of Loans, Non-accruals, fair value | loan	69		69			98
Fair Value Carrying Amount	$ 200,000		$ 200,000			$ 200,000
Net charge-offs on loans accounted for under the fair value option	(400,000)	$ 600,000	(700,000)	$ 1,000,000
Other real estate owned, gross	0		0			$ 0
Charge-offs	$ 15,000	$ 13,000	26,000	$ 30,000
Significant Unobservable Inputs (Level 3)
Summary of assets measured on a recurring and nonrecurring basis
Provision for loan losses, specific reserves			$ 9,100,000