FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS - Assets Measured at Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Assets Measured at Fair Value
Total, fair value	$ 472,814	$ 498,033
Impaired loans with a valuation allowance		3,460
Valuation allowance		(453)
Impaired loans, net		3,460
Interest rate swap agreements
Assets Measured at Fair Value
Fair value derivative asset	3,145	3,638
Fair value of the derivative liability	3,145	3,638
Obligations of the U.S. Treasury
Assets Measured at Fair Value
Total, fair value	31,163	31,836
Obligations of U.S. Government agencies
Assets Measured at Fair Value
Total, fair value	23,348	23,430
Bank holding company debt securities
Assets Measured at Fair Value
Total, fair value	24,723	25,386
Obligations Of States And Political Subdivisions Tax Exempt
Assets Measured at Fair Value
Total, fair value	117,812	132,623
Obligations Of States And Political Subdivisions Taxable
Assets Measured at Fair Value
Total, fair value	57,572	56,812
Residential Passthrough Securities
Assets Measured at Fair Value
Total, fair value	97,807	99,941
Residential Collateralized Mortgage Obligations
Assets Measured at Fair Value
Total, fair value	38,117	40,296
Commercial Mortgage Backed Securities
Assets Measured at Fair Value
Total, fair value	74,195	79,686
Private label commercial mortgage-backed securities
Assets Measured at Fair Value
Total, fair value	8,077	8,023
Recurring fair value measurements
Assets Measured at Fair Value
Total, fair value	472,814	498,033
Marketable equity security	873	859
Servicing rights	2,585	2,653
Total asset fair value measurements	479,417	505,183
Recurring fair value measurements | Level 1
Assets Measured at Fair Value
Total, fair value	31,163	31,836
Marketable equity security	873	859
Servicing rights	0	0
Total asset fair value measurements	32,036	32,695
Recurring fair value measurements | Level 2
Assets Measured at Fair Value
Total, fair value	441,651	466,197
Marketable equity security	0	0
Servicing rights	0	0
Total asset fair value measurements	444,796	469,835
Recurring fair value measurements | Level 3
Assets Measured at Fair Value
Total, fair value	0	0
Marketable equity security	0	0
Servicing rights	2,585	2,653
Total asset fair value measurements	2,585	2,653
Recurring fair value measurements | Interest rate swap agreements
Assets Measured at Fair Value
Fair value derivative asset	3,145	3,638
Fair value of the derivative liability	3,145	3,638
Recurring fair value measurements | Interest rate swap agreements | Level 1
Assets Measured at Fair Value
Fair value derivative asset	0	0
Fair value of the derivative liability	0	0
Recurring fair value measurements | Interest rate swap agreements | Level 2
Assets Measured at Fair Value
Fair value derivative asset	3,145	3,638
Fair value of the derivative liability	3,145	3,638
Recurring fair value measurements | Interest rate swap agreements | Level 3
Assets Measured at Fair Value
Fair value derivative asset	0	0
Fair value of the derivative liability	0	0
Recurring fair value measurements | Obligations of the U.S. Treasury
Assets Measured at Fair Value
Total, fair value	31,163	31,836
Recurring fair value measurements | Obligations of the U.S. Treasury | Level 1
Assets Measured at Fair Value
Total, fair value	31,163	31,836
Recurring fair value measurements | Obligations of the U.S. Treasury | Level 2
Assets Measured at Fair Value
Total, fair value	0	0
Recurring fair value measurements | Obligations of the U.S. Treasury | Level 3
Assets Measured at Fair Value
Total, fair value	0	0
Recurring fair value measurements | Obligations of U.S. Government agencies
Assets Measured at Fair Value
Total, fair value	23,348	23,430
Recurring fair value measurements | Obligations of U.S. Government agencies | Level 1
Assets Measured at Fair Value
Total, fair value	0	0
Recurring fair value measurements | Obligations of U.S. Government agencies | Level 2
Assets Measured at Fair Value
Total, fair value	23,348	23,430
Recurring fair value measurements | Obligations of U.S. Government agencies | Level 3
Assets Measured at Fair Value
Total, fair value	0	0
Recurring fair value measurements | Bank holding company debt securities
Assets Measured at Fair Value
Total, fair value	24,723	25,386
Recurring fair value measurements | Bank holding company debt securities | Level 1
Assets Measured at Fair Value
Total, fair value	0	0
Recurring fair value measurements | Bank holding company debt securities | Level 2
Assets Measured at Fair Value
Total, fair value	24,723	25,386
Recurring fair value measurements | Bank holding company debt securities | Level 3
Assets Measured at Fair Value
Total, fair value	0	0
Recurring fair value measurements | Obligations Of States And Political Subdivisions Tax Exempt
Assets Measured at Fair Value
Total, fair value	117,812	132,623
Recurring fair value measurements | Obligations Of States And Political Subdivisions Tax Exempt | Level 1
Assets Measured at Fair Value
Total, fair value	0	0
Recurring fair value measurements | Obligations Of States And Political Subdivisions Tax Exempt | Level 2
Assets Measured at Fair Value
Total, fair value	117,812	132,623
Recurring fair value measurements | Obligations Of States And Political Subdivisions Tax Exempt | Level 3
Assets Measured at Fair Value
Total, fair value	0	0
Recurring fair value measurements | Obligations Of States And Political Subdivisions Taxable
Assets Measured at Fair Value
Total, fair value	57,572	56,812
Recurring fair value measurements | Obligations Of States And Political Subdivisions Taxable | Level 1
Assets Measured at Fair Value
Total, fair value	0	0
Recurring fair value measurements | Obligations Of States And Political Subdivisions Taxable | Level 2
Assets Measured at Fair Value
Total, fair value	57,572	56,812
Recurring fair value measurements | Obligations Of States And Political Subdivisions Taxable | Level 3
Assets Measured at Fair Value
Total, fair value	0	0
Recurring fair value measurements | Residential Passthrough Securities
Assets Measured at Fair Value
Total, fair value	97,807	99,941
Recurring fair value measurements | Residential Passthrough Securities | Level 1
Assets Measured at Fair Value
Total, fair value	0	0
Recurring fair value measurements | Residential Passthrough Securities | Level 2
Assets Measured at Fair Value
Total, fair value	97,807	99,941
Recurring fair value measurements | Residential Passthrough Securities | Level 3
Assets Measured at Fair Value
Total, fair value	0	0
Recurring fair value measurements | Residential Collateralized Mortgage Obligations
Assets Measured at Fair Value
Total, fair value	38,117	40,296
Recurring fair value measurements | Residential Collateralized Mortgage Obligations | Level 1
Assets Measured at Fair Value
Total, fair value	0	0
Recurring fair value measurements | Residential Collateralized Mortgage Obligations | Level 2
Assets Measured at Fair Value
Total, fair value	38,117	40,296
Recurring fair value measurements | Residential Collateralized Mortgage Obligations | Level 3
Assets Measured at Fair Value
Total, fair value	0	0
Recurring fair value measurements | Commercial Mortgage Backed Securities
Assets Measured at Fair Value
Total, fair value	74,195	79,686
Recurring fair value measurements | Commercial Mortgage Backed Securities | Level 1
Assets Measured at Fair Value
Total, fair value	0	0
Recurring fair value measurements | Commercial Mortgage Backed Securities | Level 2
Assets Measured at Fair Value
Total, fair value	74,195	79,686
Recurring fair value measurements | Commercial Mortgage Backed Securities | Level 3
Assets Measured at Fair Value
Total, fair value	0	0
Recurring fair value measurements | Private label commercial mortgage-backed securities
Assets Measured at Fair Value
Total, fair value	8,077	8,023
Recurring fair value measurements | Private label commercial mortgage-backed securities | Level 1
Assets Measured at Fair Value
Total, fair value	0	0
Recurring fair value measurements | Private label commercial mortgage-backed securities | Level 2
Assets Measured at Fair Value
Total, fair value	8,077	8,023
Recurring fair value measurements | Private label commercial mortgage-backed securities | Level 3
Assets Measured at Fair Value
Total, fair value	0	0
Nonrecurring fair value measurements
Assets Measured at Fair Value
Total asset fair value measurements	5,366	3,282
Impaired loans, net		3,007
Loans individually evaluated for credit loss, net	4,907
Foreclosed assets held for sale	459	275
Nonrecurring fair value measurements | Level 1
Assets Measured at Fair Value
Total asset fair value measurements	0	0
Impaired loans, net		0
Loans individually evaluated for credit loss, net	0
Foreclosed assets held for sale	0	0
Nonrecurring fair value measurements | Level 2
Assets Measured at Fair Value
Total asset fair value measurements	0	0
Impaired loans, net		0
Loans individually evaluated for credit loss, net	0
Foreclosed assets held for sale	0	0
Nonrecurring fair value measurements | Level 3
Assets Measured at Fair Value
Total asset fair value measurements	5,366	3,282
Impaired loans, net		3,007
Loans individually evaluated for credit loss, net	4,907
Foreclosed assets held for sale	$ 459	$ 275