FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS - Assets Measured at Fair Value (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Assets Measured at Fair Value
Total, fair value	$ 498,033,000	$ 517,679,000
Marketable equity security	859,000	971,000
Impaired loans with a valuation allowance	3,460,000	6,540,000
Valuation allowance	(453,000)	(740,000)
Impaired loans, net	3,460,000	6,540,000
Obligations of the U.S. Treasury
Assets Measured at Fair Value
Total, fair value	31,836,000	24,912,000
Obligations of U.S. Government agencies
Assets Measured at Fair Value
Total, fair value	23,430,000	24,091,000
Bank holding company debt securities
Assets Measured at Fair Value
Total, fair value	25,386,000	17,987,000
Obligations Of States And Political Subdivisions Tax Exempt
Assets Measured at Fair Value
Total, fair value	132,623,000	148,028,000
Obligations Of States And Political Subdivisions Taxable
Assets Measured at Fair Value
Total, fair value	56,812,000	72,765,000
Residential Passthrough Securities
Assets Measured at Fair Value
Total, fair value	99,941,000	98,181,000
Residential Collateralized Mortgage Obligations
Assets Measured at Fair Value
Total, fair value	40,296,000	44,247,000
Commercial Mortgage Backed Securities
Assets Measured at Fair Value
Total, fair value	79,686,000	87,468,000
Private label commercial mortgage-backed securities
Assets Measured at Fair Value
Total, fair value	8,023,000
Private label commercial mortgage-backed securities | Level 1
Assets Measured at Fair Value
Total, fair value	0
Private label commercial mortgage-backed securities | Level 2
Assets Measured at Fair Value
Total, fair value	8,023,000
Private label commercial mortgage-backed securities | Level 3
Assets Measured at Fair Value
Total, fair value	0
Recurring fair value measurements
Assets Measured at Fair Value
Total, fair value	498,033,000	517,679,000
Marketable equity security	859,000	971,000
Servicing rights	2,653,000	2,329,000
Total asset fair value measurements	505,183,000	524,083,000
Recurring fair value measurements | Level 1
Assets Measured at Fair Value
Total, fair value	31,836,000	24,912,000
Marketable equity security	859,000	971,000
Servicing rights	0	0
Total asset fair value measurements	32,695,000	25,883,000
Recurring fair value measurements | Level 2
Assets Measured at Fair Value
Total, fair value	466,197,000	492,767,000
Marketable equity security	0	0
Servicing rights	0	0
Total asset fair value measurements	469,835,000	495,871,000
Recurring fair value measurements | Level 3
Assets Measured at Fair Value
Total, fair value	0	0
Marketable equity security	0	0
Servicing rights	2,653,000	2,329,000
Total asset fair value measurements	2,653,000	2,329,000
Recurring fair value measurements | Interest rate swap agreements
Assets Measured at Fair Value
Fair value derivative asset	3,638,000	3,104,000
Fair value of the derivative liability	3,638,000	3,104,000
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	3,638,000	3,104,000
Fair value of the derivative liability	3,638,000	3,104,000
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	31,836,000	24,912,000
Recurring fair value measurements | Obligations of the U.S. Treasury | Level 1
Assets Measured at Fair Value
Total, fair value	31,836,000	24,912,000
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	23,430,000	24,091,000
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	23,430,000	24,091,000
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	25,386,000	17,987,000
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	25,386,000	17,987,000
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	132,623,000	148,028,000
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	132,623,000	148,028,000
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	56,812,000	72,765,000
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	56,812,000	72,765,000
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	99,941,000	98,181,000
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	99,941,000	98,181,000
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	40,296,000	44,247,000
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	40,296,000	44,247,000
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	79,686,000	87,468,000
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	79,686,000	87,468,000
Recurring fair value measurements | 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	3,282,000	6,484,000
Impaired loans, net	3,007,000	5,800,000
Foreclosed assets held for sale	275,000	684,000
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	3,282,000	6,484,000
Impaired loans, net	3,007,000	5,800,000
Foreclosed assets held for sale	$ 275,000	$ 684,000