FAIR VALUE - Carrying Amount and Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
ASSETS
Debt securities available-for-sale	$ 348,565	$ 341,955
Debt securities held-to-maturity	352,138	360,570
Carrying Amount
ASSETS
Cash and cash equivalents	301,453	222,046
Debt securities available-for-sale	348,565	341,955
Debt securities held-to-maturity	381,706	388,968
Equity securities	9,581	9,301
Loans held for sale	1,010	675
Net loans receivable	4,385,566	4,422,644
FHLB and other restricted stock holdings and investments	31,017	30,011
Interest rate swaps	1,560	1,013
Accrued interest receivable	24,978	24,318
LIABILITIES
Deposits	(5,037,553)	(4,998,750)
Subordinated notes and debentures	(104,963)	(104,887)
Interest rate swaps	(1,560)	(1,013)
Accrued interest payable	(5,314)	(3,550)
Total Fair Value
ASSETS
Cash and cash equivalents	301,453	222,046
Debt securities available-for-sale	348,565	341,955
Debt securities held-to-maturity	352,138	360,570
Equity securities	9,581	9,301
Loans held for sale	1,006	677
Net loans receivable	4,268,986	4,323,476
Interest rate swaps	1,560	1,013
Accrued interest receivable	24,978	24,318
LIABILITIES
Deposits	(5,040,307)	(5,000,437)
Subordinated notes and debentures	(135,210)	(134,298)
Interest rate swaps	(1,560)	(1,013)
Accrued interest payable	(5,314)	(3,550)
Quoted Prices in Active Markets for Identical Assets (Level 1) | Total Fair Value
ASSETS
Cash and cash equivalents	301,453	222,046
Debt securities available-for-sale	14,482	4,988
Debt securities held-to-maturity	104,088	104,141
Equity securities	9,049	8,667
Loans held for sale	0	0
Net loans receivable	0	0
Interest rate swaps	0	0
Accrued interest receivable	503	410
LIABILITIES
Deposits	(4,504,782)	(4,492,256)
Subordinated notes and debentures	0	0
Interest rate swaps	0	0
Accrued interest payable	0	0
Significant Other Observable Inputs (Level 2) | Total Fair Value
ASSETS
Cash and cash equivalents	0	0
Debt securities available-for-sale	334,083	336,967
Debt securities held-to-maturity	248,050	256,429
Equity securities	532	634
Loans held for sale	1,006	677
Net loans receivable	0	0
Interest rate swaps	1,560	1,013
Accrued interest receivable	2,350	2,319
LIABILITIES
Deposits	(535,525)	(508,181)
Subordinated notes and debentures	(135,210)	(134,298)
Interest rate swaps	(1,560)	(1,013)
Accrued interest payable	(5,314)	(3,550)
Significant Unobservable Inputs (Level 3) | Total Fair Value
ASSETS
Cash and cash equivalents	0	0
Debt securities available-for-sale	0	0
Debt securities held-to-maturity	0	0
Equity securities	0	0
Loans held for sale	0	0
Net loans receivable	4,268,986	4,323,476
Interest rate swaps	0	0
Accrued interest receivable	22,125	21,589
LIABILITIES
Deposits	0	0
Subordinated notes and debentures	0	0
Interest rate swaps	0	0
Accrued interest payable	$ 0	$ 0