FAIR VALUE - Fair Value Measurements, by Fair Value hierarchy (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Available-for-sale investment securities	$ 250,086	$ 220,028
Corporate securities
Available-for-sale investment securities	485	380
Obligations of states and political subdivisions
Available-for-sale investment securities	249,601	219,648
Quoted Prices In Active Markets for Identical Assets (Level 1)
Available-for-sale investment securities	485	380
Quoted Prices In Active Markets for Identical Assets (Level 1) | Corporate securities
Available-for-sale investment securities	485	380
Quoted Prices In Active Markets for Identical Assets (Level 1) | Obligations of states and political subdivisions
Available-for-sale investment securities	0	0
Significant Other Observable Inputs (Level 2)
Available-for-sale investment securities	249,601	219,648
Significant Other Observable Inputs (Level 2) | Corporate securities
Available-for-sale investment securities	0	0
Significant Other Observable Inputs (Level 2) | Obligations of states and political subdivisions
Available-for-sale investment securities	249,601	219,648
Significant Unobservable Inputs (Level 3)
Available-for-sale investment securities	0	0
Significant Unobservable Inputs (Level 3) | Corporate securities
Available-for-sale investment securities	0	0
Significant Unobservable Inputs (Level 3) | Obligations of states and political subdivisions
Available-for-sale investment securities	$ 0	$ 0