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LOANS AND RELATED ALLOWANCE FOR LOAN LOSSES, Primary Segments Portfolio and Accretable Yield for PCI Loans (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Apr. 17, 2020 | Dec. 31, 2019
Segments of loan portfolio and allowance for loan losses [Abstract] |  |  |  |
Total loan receivables | $ 1,441,533 | $ 1,405,281 |  |
Individually evaluated for impairment | 15,533 | 17,277 |  |
Loans acquired with deteriorated credit quality (PCI) | 3,802 | 4,875 |  |
Collectively evaluated for impairment | 1,422,198 | 1,383,129 |  |
Net unamortized loan fees and costs | 2,038 | 2,344 |  |
Loans And Leases Receivable, Allowance For Loan Losses [Abstract] |  |  |  |
Allowance for loan losses | 17,304 | 15,815 |  |
Individually evaluated for impairment | 121 | 510 |  | $ 735
Allowance for loan losses related to loans acquired with deteriorated credit quality | 0 | 0 |  |
Collectively evaluated for impairment | 17,183 | 15,305 |  | 13,110
Loans and Leases Receivable, Net Amount [Abstract] |  |  |  |
Net loans | 1,424,229 | 1,389,466 |  |
Net loans, individually evaluated for impairment | 15,412 | 16,767 |  |
Net loans, loans acquired with deteriorated credit quality | 3,802 | 4,875 |  |
Net loans, collectively evaluated for impairment | 1,405,015 | 1,367,824 |  |
Real estate loans serviced for Freddie Mac and Fannie Mae | 197,037 | 178,986 |  |
Real estate loans sold to Freddie Mac and Fannie Mae without recourse | 184,897 | 162,050 |  |
Portfolio balance under MPF | 12,140 | 16,936 |  |
First-loss position for MPF maintained by FHLB | 157 |  |  |
Credit enhancement for MPF by FHLB | $ 590 |  |  |
Number of days past for loan to be considered impaired, Minimum | 90 days |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |  |
Unpaid principal balance | $ 17,905 | 19,050 |  |
Changes in the accretable yield for purchased credit-impaired loans [Roll Forward] |  |  |  |
Balance at beginning of period | 788 | 89 |  |
Addition due to MidCoast Acquisition | 0 | 966 |  |
Accretion | (499) | (267) |  |
Reclassification of non-accretable discount | 81 | 0 |  |
Balance at end of period | 370 | 788 |  |
Loans acquired with specific evidence of deterioration in credit quality [Abstract] |  |  |  |
Outstanding balance | 6,159 | 8,958 |  |
Carrying amount | $ 3,802 | 4,875 |  |
Minimum [Member] |  |  |  |
Loans and Leases Receivable, Net Amount [Abstract] |  |  |  |
Number of days past for loan to be considered impaired, Minimum | 90 days |  |  |
First Mortgage [Member] | Minimum [Member] |  |  |  |
Loans and Leases Receivable, Net Amount [Abstract] |  |  |  |
Period of mortgage on real estate | 15 years |  |  |
First Mortgage [Member] | Maximum [Member] |  |  |  |
Loans and Leases Receivable, Net Amount [Abstract] |  |  |  |
Period of mortgage on real estate | 30 years |  |  |
Second Mortgage [Member] | Maximum [Member] |  |  |  |
Loans and Leases Receivable, Net Amount [Abstract] |  |  |  |
Period of mortgage on real estate | 15 years |  |  |
COVID-19 [Member] |  |  |  |
Segments of loan portfolio and allowance for loan losses [Abstract] |  |  |  |
Outstanding principal balances | $ 6,800 | 37,200 |  |
Loans originated | 24,300 | 54,300 |  |
Loans outstanding | $ 6,000 | 806 |  |
COVID-19 [Member] | Paycheck Protection Program [Member] |  |  |  |
Segments of loan portfolio and allowance for loan losses [Abstract] |  |  |  |
Interest rate | 1.00% |  |  |
Maximum amount of loan forgiven by guidance from SBA | $ 150 |  |  |
Proceeds from loans receivable | 3,800 | 3,800 |  |
Deferred fees | 270 |  |  |
Real Estate Loans [Member] | Residential [Member] |  |  |  |
Segments of loan portfolio and allowance for loan losses [Abstract] |  |  |  |
Total loan receivables | 201,097 | 201,911 |  |
Individually evaluated for impairment | 620 | 990 |  |
Loans acquired with deteriorated credit quality (PCI) | 14 | 20 |  |
Collectively evaluated for impairment | 200,463 | 200,901 |  |
Loans And Leases Receivable, Allowance For Loan Losses [Abstract] |  |  |  |
Individually evaluated for impairment | 12 | 18 |  | 32
Collectively evaluated for impairment | 1,135 | 1,156 |  | 1,082
Real Estate Loans [Member] | Commercial [Member] |  |  |  |
Segments of loan portfolio and allowance for loan losses [Abstract] |  |  |  |
Total loan receivables | 687,338 | 596,255 |  |
Individually evaluated for impairment | 8,381 | 9,183 |  |
Loans acquired with deteriorated credit quality (PCI) | 2,145 | 2,937 |  |
Collectively evaluated for impairment | 676,812 | 584,135 |  |
Loans And Leases Receivable, Allowance For Loan Losses [Abstract] |  |  |  |
Individually evaluated for impairment | 61 | 95 |  | 251
Collectively evaluated for impairment | 8,038 | 6,121 |  | 4,298
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |  |
Unpaid principal balance | 9,330 | 9,847 |  |
Real Estate Loans [Member] | Agricultural [Member] |  |  |  |
Segments of loan portfolio and allowance for loan losses [Abstract] |  |  |  |
Total loan receivables | 312,011 | 315,158 |  |
Individually evaluated for impairment | 5,355 | 4,645 |  |
Loans acquired with deteriorated credit quality (PCI) | 1,643 | 1,686 |  |
Collectively evaluated for impairment | 305,013 | 308,827 |  |
Loans And Leases Receivable, Allowance For Loan Losses [Abstract] |  |  |  |
Individually evaluated for impairment | 14 | 83 |  | 151
Collectively evaluated for impairment | 4,715 | 4,870 |  | 4,871
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |  |
Unpaid principal balance | 5,694 | 4,811 |  |
Real Estate Loans [Member] | Construction [Member] |  |  |  |
Segments of loan portfolio and allowance for loan losses [Abstract] |  |  |  |
Total loan receivables | 55,036 | 35,404 |  |
Individually evaluated for impairment | 0 | 0 |  |
Loans acquired with deteriorated credit quality (PCI) | 0 | 0 |  |
Collectively evaluated for impairment | 55,036 | 35,404 |  |
Loans And Leases Receivable, Allowance For Loan Losses [Abstract] |  |  |  |
Individually evaluated for impairment | 0 | 0 |  | 0
Collectively evaluated for impairment | 434 | 122 |  | 43
Consumer [Member] |  |  |  |
Segments of loan portfolio and allowance for loan losses [Abstract] |  |  |  |
Total loan receivables | 25,858 | 30,277 |  |
Individually evaluated for impairment | 0 | 2 |  |
Loans acquired with deteriorated credit quality (PCI) | 0 | 0 |  |
Collectively evaluated for impairment | 25,858 | 30,275 |  |
Loans And Leases Receivable, Allowance For Loan Losses [Abstract] |  |  |  |
Individually evaluated for impairment | 0 | 0 |  | 0
Collectively evaluated for impairment | 262 | 321 |  | 112
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |  |
Unpaid principal balance | 0 | 2 |  |
Other Commercial Loans [Member] |  |  |  |
Segments of loan portfolio and allowance for loan losses [Abstract] |  |  |  |
Total loan receivables | 74,585 | 114,169 |  |
Individually evaluated for impairment | 186 | 1,335 |  |
Loans acquired with deteriorated credit quality (PCI) | 0 | 232 |  |
Collectively evaluated for impairment | 74,399 | 112,602 |  |
Loans And Leases Receivable, Allowance For Loan Losses [Abstract] |  |  |  |
Individually evaluated for impairment | 34 | 170 |  | 147
Collectively evaluated for impairment | 989 | 1,056 |  | 1,108
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |  |
Unpaid principal balance | 813 | 1,908 |  |
Other Agricultural Loans [Member] |  |  |  |
Segments of loan portfolio and allowance for loan losses [Abstract] |  |  |  |
Total loan receivables | 39,852 | 48,779 |  |
Individually evaluated for impairment | 991 | 1,122 |  |
Loans acquired with deteriorated credit quality (PCI) | 0 | 0 |  |
Collectively evaluated for impairment | 38,861 | 47,657 |  |
Loans And Leases Receivable, Allowance For Loan Losses [Abstract] |  |  |  |
Individually evaluated for impairment | 0 | 144 |  | 154
Collectively evaluated for impairment | 558 | 720 |  | 807
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |  |
Unpaid principal balance | 1,274 | 1,262 |  |
State and Political Subdivision Loans [Member] |  |  |  |
Segments of loan portfolio and allowance for loan losses [Abstract] |  |  |  |
Total loan receivables | 45,756 | 63,328 |  |
Individually evaluated for impairment | 0 | 0 |  |
Loans acquired with deteriorated credit quality (PCI) | 0 | 0 |  |
Collectively evaluated for impairment | 45,756 | 63,328 |  |
Loans And Leases Receivable, Allowance For Loan Losses [Abstract] |  |  |  |
Individually evaluated for impairment | 0 | 0 |  | 0
Collectively evaluated for impairment | $ 281 | $ 479 |  | $ 536
MidCoast Community Bancorp, Inc [Member] |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |  |
Unpaid principal balance |  |  | $ 8,005 |
Purchase accounting adjustments related to purchased impaired loans [Abstract] |  |  |  |
Contractually required principal and interest at acquisition |  |  | 8,801 |
Non-accretable discount |  |  | (2,966) |
Expected cash flows |  |  | 5,835 |
Accretable discount |  |  | (966) |
Estimated fair value |  |  | $ 4,869 |

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- Definition Amount of reclassified non-accretable discount recognized for the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities, with evidence of deterioration of credit quality. + References No definition available. + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements, related to loans acquired with deteriorated credit quality. + References No definition available. + Details
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- Definition Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale. Related to Collectively evaluated for impairment. + References No definition available. + Details
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- Definition Refers to Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale. Related to Individually evaluated for impairment. + References No definition available. + Details
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- Definition Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale. Related to Loans acquired with deteriorated credit quality. + References No definition available. + Details
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- Definition Amount of the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123409700&loc=d3e13503-111538 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=121614798&loc=d3e15032-111544 + Details
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- Definition Amount of accretion recognized for the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities, with evidence of deterioration of credit quality. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123409700&loc=d3e13503-111538 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=121614798&loc=d3e15032-111544 + Details
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- Definition The recorded balance, net of any applicable reductions (for example, unamortized accretable yield and allowance for loan losses). This relates to loans not accounted for debt securities with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=121614798&loc=d3e15032-111544 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123409700&loc=d3e13503-111538 + Details
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