FAIR VALUE - Narrative (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023 USD ($) loan	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) loan	Sep. 30, 2022 USD ($)	Dec. 31, 2022 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		$ 2,000,000
Value of loans sold	$ 40,800,000		40,800,000
90 days or more past due, fair value and still accruing	$ 0		$ 0		$ 0
Number of Loans, Non-accruals, fair value | loan	113		113		145
Fair Value Carrying Amount	$ 300,000		$ 300,000		$ 100,000
Net charge-offs on loans accounted for under the fair value option	400,000		1,500,000
Other real estate owned, gross	0		0		0
Total non-accrual loans	55,620,000		55,620,000		12,137,000
Charge-offs	198,000	$ 50,000	228,000	$ 242,000	300,000
Individual Commercial and Industrial, Individually Analyzed Loan
Summary of assets measured on a recurring and nonrecurring basis
Total non-accrual loans	$ 8,600,000		8,600,000
Provision for loan losses, specific reserves			4,000,000
Significant Unobservable Inputs (Level 3)
Summary of assets measured on a recurring and nonrecurring basis
OREO carrying amount					400,000
Provision for loan losses, specific reserves			$ 4,000,000		$ 0