FAIR VALUE OF FINANCIAL INSTRUMENTS - Recurring basis (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
FAIR VALUE OF FINANCIAL INSTRUMENTS
Transfer of assets from level 1 to level 2	$ 0	$ 0
Transfer of assets from level 2 to level 1	0	0
Transfer of assets in to level 3	0	0
Transfer of assets out of level 3	0	0
Transfer of liabilities from level 1 to level 2	0	0
Transfer of liabilities from level 2 to level 1	0	0
Transfer of liabilities in to level 3	0	0
Transfer of liabilities out of level 3	0	0
Debt securities available-for-sale, at fair value	942,168	922,869
Equity securities	3,443	3,292
Fair value	7,994	5,934
U.S. Treasury
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	108,976
U.S. government agency
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	128,105	121,993
Municipal securities
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	297,077	274,261
Mortgage-backed: Agency residential
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	179,466	203,252
Mortgage-backed: Agency commercial
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	164,061	250,766
Corporate
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	64,483	72,597
Recurring
FAIR VALUE OF FINANCIAL INSTRUMENTS
Equity securities	3,443	3,292
Fair value	7,994	5,934
Derivative financial assets fair value	8,697	15,360
Derivative financial liabilities fair value	9,377	16,818
Recurring \| U.S. Treasury
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	108,976
Recurring \| U.S. government agency
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	128,105	121,993
Recurring \| Municipal securities
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	297,077	274,261
Recurring \| Mortgage-backed: Agency residential
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	179,466	203,252
Recurring \| Mortgage-backed: Agency commercial
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	164,061	250,766
Recurring \| Corporate
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	64,483	72,597
Recurring \| Level 1
FAIR VALUE OF FINANCIAL INSTRUMENTS
Equity securities	3,443	3,292
Recurring \| Level 1 \| U.S. Treasury
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	108,976
Recurring \| Level 2
FAIR VALUE OF FINANCIAL INSTRUMENTS
Derivative financial assets fair value	8,697	15,360
Derivative financial liabilities fair value	9,377	16,818
Recurring \| Level 2 \| U.S. government agency
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	128,105	121,993
Recurring \| Level 2 \| Municipal securities
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	297,077	274,261
Recurring \| Level 2 \| Mortgage-backed: Agency residential
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	179,466	203,252
Recurring \| Level 2 \| Mortgage-backed: Agency commercial
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	164,061	250,766
Recurring \| Level 2 \| Corporate
FAIR VALUE OF FINANCIAL INSTRUMENTS
Debt securities available-for-sale, at fair value	64,483	72,597
Recurring \| Level 3
FAIR VALUE OF FINANCIAL INSTRUMENTS
Fair value	$ 7,994	$ 5,934

Amount of 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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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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