INVESTMENT SECURITIES - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Proceeds from sales of available for sale securities	$ 5,105	$ 0
Gross gains on sale of available-for-sale securities	12	0
Gross losses on sale of available-for-sale securities	0	0
Federal Reserve Bank
Debt Instrument [Line Items]
Long-term line of credit	0	0
Mortgage-backed securities \| MPF Credit Enhancement Fee
Debt Instrument [Line Items]
Available-for-sale security, restricted	179	142
Mortgage-backed securities \| MPF Credit Enhancement Fee \| Federal Home Loan Bank of Des Moines
Debt Instrument [Line Items]
Available-for-sale security, restricted	415
Mortgage-backed securities \| Collateral Pledged \| Federal Reserve Bank
Debt Instrument [Line Items]
Available-for-sale security, restricted	29,191	5,421
Mortgage-backed securities \| Collateral Pledged \| Specific Municipal Deposits
Debt Instrument [Line Items]
Available-for-sale security, restricted	1,928	2,219
U.S. government agency obligations \| Collateral Pledged \| Specific Municipal Deposits
Debt Instrument [Line Items]
Available-for-sale security, restricted	$ 516	$ 2,602

Amount of unrealized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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