DEBT SECURITIES - Contractual maturity (Details)	3 Months Ended
	Mar. 31, 2024 USD ($) security	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)
Securities
Gain on sale and call of securities, net	$ 0	$ 0
Fair Value	291,008,000		$ 290,151,000
Fair Value	19,102,000		19,262,000
Allowance for Credit Loss	0
Amortized Cost-Available-for-Sale
After 1 year through 5 years	7,998,000
After 5 years through 10 years	41,145,000
Total for contractual maturity	49,143,000
Total	357,954,000		352,157,000
Fair Value-Available-for-Sale
After 1 year through 5 years	7,564,000
After 5 years through 10 years	34,266,000
Total for contractual maturity	41,830,000
Total	291,008,000		290,151,000
Amortized Cost-Held-to-Maturity
Amortized Cost	19,724,000		19,796,000
After 1 year through 5 years	15,000,000
Total for contractual maturity	15,000,000
Total	19,724,000
Fair Value-Held-to-Maturity
After 1 year through 5 years	14,523,000
Total for contractual maturity	14,523,000
Total	$ 19,102,000		19,262,000
Sales and proceeds
Number of holdings greater than 10% of shareholder equity | security	0
Minimum
Securities
Maturity period	1 year
Maximum
Securities
Maturity period	29 years
Asset Pledged as Collateral
Securities
Fair Value	$ 158,300,000
Fair Value-Available-for-Sale
Total	158,300,000
U.S. government agency and government-sponsored residential mortgage-backed securities
Securities
Fair Value	246,071,000		245,597,000
Amortized Cost-Available-for-Sale
No single maturity date	305,548,000
Total	305,548,000		300,277,000
Fair Value-Available-for-Sale
No single maturity date	246,071,000
Total	246,071,000		245,597,000
U.S. government-sponsored collateralized mortgage obligations
Securities
Fair Value	1,590,000		1,782,000
Amortized Cost-Available-for-Sale
No single maturity date	1,656,000
Total	1,656,000		1,852,000
Fair Value-Available-for-Sale
No single maturity date	1,590,000
Total	1,590,000		1,782,000
SBA asset-backed securities
Securities
Fair Value	1,517,000		1,778,000
Fair Value	4,579,000		4,700,000
Amortized Cost-Available-for-Sale
No single maturity date	1,607,000
Total	1,607,000		1,885,000
Fair Value-Available-for-Sale
No single maturity date	1,517,000
Total	1,517,000		1,778,000
Amortized Cost-Held-to-Maturity
Amortized Cost	4,724,000		4,796,000
No single maturity date	4,724,000
Fair Value-Held-to-Maturity
No single maturity date	4,579,000
Total	4,579,000		4,700,000
U.S. government and government-sponsored enterprise obligations
Securities
Fair Value	40,016,000		40,182,000
Fair Value	14,523,000		14,562,000
Amortized Cost-Available-for-Sale
Total	47,143,000		47,143,000
Fair Value-Available-for-Sale
Total	40,016,000		40,182,000
Amortized Cost-Held-to-Maturity
Amortized Cost	15,000,000		15,000,000
Fair Value-Held-to-Maturity
Total	$ 14,523,000		14,562,000
U.S. government and government-sponsored enterprise obligations | Minimum
Securities
Maturity period	3 years
Callable period	1 month
U.S. government and government-sponsored enterprise obligations | Maximum
Securities
Maturity period	8 years
Callable period	3 years
Corporate bonds
Securities
Fair Value	$ 1,814,000		812,000
Amortized Cost-Available-for-Sale
Total	2,000,000		1,000,000
Fair Value-Available-for-Sale
Total	1,814,000		$ 812,000
U.S. government and government-sponsored enterprise obligations and corporate bonds
Securities
Fair Value	56,400,000
Fair Value-Available-for-Sale
Total	$ 56,400,000