FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS - Assets Measured at Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Assets Measured at Fair Value
Total, fair value	$ 405,094	$ 415,755
Interest rate swap agreements
Assets Measured at Fair Value
Fair value derivative asset	3,222	2,783
Fair value of the derivative liability	3,222	2,783
RPA In
Assets Measured at Fair Value
Fair value derivative asset	0	0
Fair value of the derivative liability	5	13
Obligations of the U.S. Treasury
Assets Measured at Fair Value
Total, fair value	10,231	11,290
Obligations of U.S. Government agencies
Assets Measured at Fair Value
Total, fair value	9,376	9,946
Bank holding company debt securities
Assets Measured at Fair Value
Total, fair value	23,469	23,500
Obligations Of States And Political Subdivisions Tax Exempt
Assets Measured at Fair Value
Total, fair value	102,826	104,199
Obligations Of States And Political Subdivisions Taxable
Assets Measured at Fair Value
Total, fair value	49,255	50,111
Residential Passthrough Securities
Assets Measured at Fair Value
Total, fair value	91,116	95,405
Residential Collateralized Mortgage Obligations
Assets Measured at Fair Value
Total, fair value	44,501	46,462
Commercial Mortgage Backed Securities
Assets Measured at Fair Value
Total, fair value	66,121	66,682
Private label commercial mortgage-backed securities
Assets Measured at Fair Value
Total, fair value	8,199	8,160
Recurring fair value measurements
Assets Measured at Fair Value
Total, fair value	405,094	415,755
Marketable equity security	862	871
Servicing rights	2,731	2,659
Total asset fair value measurements	411,914	422,079
Fair value of the derivative liability	3,227	2,796
Recurring fair value measurements | Level 1
Assets Measured at Fair Value
Total, fair value	10,231	11,290
Marketable equity security	862	871
Servicing rights	0	0
Total asset fair value measurements	11,093	12,161
Fair value of the derivative liability	0	0
Recurring fair value measurements | Level 2
Assets Measured at Fair Value
Total, fair value	394,863	404,465
Marketable equity security	0	0
Servicing rights	0	0
Total asset fair value measurements	398,090	407,259
Fair value of the derivative liability	3,227	2,796
Recurring fair value measurements | Level 3
Assets Measured at Fair Value
Total, fair value	0	0
Marketable equity security	0	0
Servicing rights	2,731	2,659
Total asset fair value measurements	2,731	2,659
Fair value of the derivative liability	0	0
Recurring fair value measurements | RPA Out
Assets Measured at Fair Value
Fair value derivative asset	5	11
Recurring fair value measurements | RPA Out | Level 1
Assets Measured at Fair Value
Fair value derivative asset	0	0
Recurring fair value measurements | RPA Out | Level 2
Assets Measured at Fair Value
Fair value derivative asset	5	11
Recurring fair value measurements | RPA Out | Level 3
Assets Measured at Fair Value
Fair value derivative asset	0	0
Recurring fair value measurements | Interest rate swap agreements
Assets Measured at Fair Value
Fair value derivative asset	3,222	2,783
Fair value of the derivative liability	3,222	2,783
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	3,222	2,783
Fair value of the derivative liability	3,222	2,783
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 | RPA In
Assets Measured at Fair Value
Fair value of the derivative liability	5	13
Recurring fair value measurements | RPA In | Level 1
Assets Measured at Fair Value
Fair value of the derivative liability	0	0
Recurring fair value measurements | RPA In | Level 2
Assets Measured at Fair Value
Fair value of the derivative liability	5	13
Recurring fair value measurements | RPA In | Level 3
Assets Measured at Fair Value
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	10,231	11,290
Recurring fair value measurements | Obligations of the U.S. Treasury | Level 1
Assets Measured at Fair Value
Total, fair value	10,231	11,290
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	9,376	9,946
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	9,376	9,946
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	23,469	23,500
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	23,469	23,500
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	102,826	104,199
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	102,826	104,199
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	49,255	50,111
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	49,255	50,111
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	91,116	95,405
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	91,116	95,405
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	44,501	46,462
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	44,501	46,462
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	66,121	66,682
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	66,121	66,682
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	8,199	8,160
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	8,199	8,160
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	9,115	7,521
Impaired loans, net	8,659	7,043
Foreclosed assets held for sale	456	478
Nonrecurring fair value measurements | Level 1
Assets Measured at Fair Value
Total asset fair value measurements	0	0
Impaired loans, net	0	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	0
Foreclosed assets held for sale	0	0
Nonrecurring fair value measurements | Level 3
Assets Measured at Fair Value
Total asset fair value measurements	9,115	7,521
Impaired loans, net	8,659	7,043
Foreclosed assets held for sale	$ 456	$ 478