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LOANS AND RELATED ALLOWANCE FOR LOAN LOSSES (Details) - USD ($) $ in Thousands | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 11, 2015
Segments of loan portfolio and allowance for loan losses [Abstract] |  |  |  |  |  |
Total financing receivables |  |  | $ 1,081,883 | $ 1,000,525 |  |
Individually evaluated for impairment |  |  | 23,450 | 24,398 |  |
Loans acquired with deteriorated credit quality |  |  | 1,859 | 2,638 |  |
Collectively evaluated for impairment |  |  | 1,056,574 | 973,489 |  |
Allowance for loan losses |  |  | 12,884 | 11,190 |  |
Allowance for loan losses related to individually evaluated for impairment |  |  | 676 | 410 | $ 487 |
Allowance for loan losses related to loans acquired with deteriorated credit quality |  |  | 0 | 0 |  |
Allowance for loan losses related to collectively evaluated for impairment |  |  | 12,208 | 10,780 | 8,399 |
Net loans |  |  | 1,068,999 | 989,335 |  |
Net loans, individually evaluated for impairment |  |  | 22,774 | 23,988 |  |
Net loans, loans acquired with deteriorated credit quality |  |  | 1,859 | 2,638 |  |
Net loans, collectively evaluated for impairment |  |  | 1,044,366 | 962,709 |  |
Net unamortized loan fees and costs |  |  | 918 | 794 |  |
Real estate loans serviced for Freddie Mac and Fannie Mae |  |  | 142,072 | 142,972 |  |
Real estate loans sold to Freddie Mac and Fannie Mae without recourse | $ 122,219 | $ 114,643 |  |  |  |
Portfolio balance under MPF |  |  | 24,853 | 28,329 |  |
First-loss position for MPF maintained by FHLB |  |  | 133 |  |  |
Credit enhancement for MPF by FHLB | $ 856 |  |  |  |  |
Number of days past for loan to be considered impaired, Minimum | 90 days |  |  |  |  |
Minimum [Member] |  |  |  |  |  |
Segments of loan portfolio and allowance for loan losses [Abstract] |  |  |  |  |  |
Number of days past for loan to be considered impaired, Minimum | 90 days |  |  |  |  |
First Mortgage [Member] | Minimum [Member] |  |  |  |  |  |
Segments of loan portfolio and allowance for loan losses [Abstract] |  |  |  |  |  |
Period of mortgage on real estate | 15 years |  |  |  |  |
First Mortgage [Member] | Maximum [Member] |  |  |  |  |  |
Segments of loan portfolio and allowance for loan losses [Abstract] |  |  |  |  |  |
Period of mortgage on real estate | 30 years |  |  |  |  |
Second Mortgage [Member] | Maximum [Member] |  |  |  |  |  |
Segments of loan portfolio and allowance for loan losses [Abstract] |  |  |  |  |  |
Period of mortgage on real estate | 15 years |  |  |  |  |
Real Estate Loans [Member] | Residential [Member] |  |  |  |  |  |
Segments of loan portfolio and allowance for loan losses [Abstract] |  |  |  |  |  |
Total financing receivables |  |  | 215,305 | 214,479 |  |
Individually evaluated for impairment |  |  | 890 | 1,065 |  |
Loans acquired with deteriorated credit quality |  |  | 28 | 33 |  |
Collectively evaluated for impairment |  |  | 214,387 | 213,381 |  |
Allowance for loan losses related to individually evaluated for impairment |  |  | 24 | 56 | 32 |
Allowance for loan losses related to collectively evaluated for impairment |  |  | 1,081 | 993 | 1,032 |
Real Estate Loans [Member] | Commercial [Member] |  |  |  |  |  |
Segments of loan portfolio and allowance for loan losses [Abstract] |  |  |  |  |  |
Total financing receivables |  |  | 319,265 | 308,084 |  |
Individually evaluated for impairment |  |  | 13,327 | 13,864 |  |
Loans acquired with deteriorated credit quality |  |  | 1,321 | 1,460 |  |
Collectively evaluated for impairment |  |  | 304,617 | 292,760 |  |
Allowance for loan losses related to individually evaluated for impairment |  |  | 216 | 94 | 45 |
Allowance for loan losses related to collectively evaluated for impairment |  |  | 3,899 | 3,773 | 3,544 |
Real Estate Loans [Member] | Agricultural [Member] |  |  |  |  |  |
Segments of loan portfolio and allowance for loan losses [Abstract] |  |  |  |  |  |
Total financing receivables |  |  | 284,520 | 239,957 |  |
Individually evaluated for impairment |  |  | 5,592 | 3,901 |  |
Loans acquired with deteriorated credit quality |  |  | 0 | 702 |  |
Collectively evaluated for impairment |  |  | 278,928 | 235,354 |  |
Allowance for loan losses related to individually evaluated for impairment |  |  | 84 | 3 | 54 |
Allowance for loan losses related to collectively evaluated for impairment |  |  | 4,180 | 3,140 | 1,440 |
Real Estate Loans [Member] | Construction [Member] |  |  |  |  |  |
Segments of loan portfolio and allowance for loan losses [Abstract] |  |  |  |  |  |
Total financing receivables |  |  | 33,913 | 13,502 |  |
Individually evaluated for impairment |  |  | 0 | 0 |  |
Loans acquired with deteriorated credit quality |  |  | 0 | 0 |  |
Collectively evaluated for impairment |  |  | 33,913 | 13,502 |  |
Allowance for loan losses related to individually evaluated for impairment |  |  | 0 | 0 | 0 |
Allowance for loan losses related to collectively evaluated for impairment |  |  | 58 | 23 | 47 |
Consumer [Member] |  |  |  |  |  |
Segments of loan portfolio and allowance for loan losses [Abstract] |  |  |  |  |  |
Total financing receivables |  |  | 9,858 | 9,944 |  |
Individually evaluated for impairment |  |  | 0 | 8 |  |
Loans acquired with deteriorated credit quality |  |  | 0 | 0 |  |
Collectively evaluated for impairment |  |  | 9,858 | 9,936 |  |
Allowance for loan losses related to individually evaluated for impairment |  |  | 0 | 0 | 0 |
Allowance for loan losses related to collectively evaluated for impairment |  |  | 120 | 124 | 122 |
Other Commercial Loans [Member] |  |  |  |  |  |
Segments of loan portfolio and allowance for loan losses [Abstract] |  |  |  |  |  |
Total financing receivables |  |  | 74,118 | 72,013 |  |
Individually evaluated for impairment |  |  | 2,206 | 4,197 |  |
Loans acquired with deteriorated credit quality |  |  | 510 | 443 |  |
Collectively evaluated for impairment |  |  | 71,402 | 67,373 |  |
Allowance for loan losses related to individually evaluated for impairment |  |  | 193 | 231 | 326 |
Allowance for loan losses related to collectively evaluated for impairment |  |  | 1,161 | 1,041 | 1,001 |
Other Agricultural Loans [Member] |  |  |  |  |  |
Segments of loan portfolio and allowance for loan losses [Abstract] |  |  |  |  |  |
Total financing receivables |  |  | 42,186 | 37,809 |  |
Individually evaluated for impairment |  |  | 1,435 | 1,363 |  |
Loans acquired with deteriorated credit quality |  |  | 0 | 0 |  |
Collectively evaluated for impairment |  |  | 40,751 | 36,446 |  |
Allowance for loan losses related to individually evaluated for impairment |  |  | 159 | 26 | 30 |
Allowance for loan losses related to collectively evaluated for impairment |  |  | 593 | 466 | 282 |
State and Political Subdivision Loans [Member] |  |  |  |  |  |
Segments of loan portfolio and allowance for loan losses [Abstract] |  |  |  |  |  |
Total financing receivables |  |  | 102,718 | 104,737 |  |
Individually evaluated for impairment |  |  | 0 | 0 |  |
Loans acquired with deteriorated credit quality |  |  | 0 | 0 |  |
Collectively evaluated for impairment |  |  | 102,718 | 104,737 |  |
Allowance for loan losses related to individually evaluated for impairment |  |  | 0 | 0 | 0 |
Allowance for loan losses related to collectively evaluated for impairment |  |  | 762 | 816 | 833 |
First National Bank of Fredericksburg [Member] |  |  |  |  |  |
Components of the purchase accounting adjustments related to the purchased impaired loans in FNB Acquisition [Abstract] |  |  |  |  |  |
Estimated fair value |  |  |  |  |  | $ 3,809
Contractually required principal and interest at acquisition |  |  |  |  |  | 9,913
Expected cash flows |  |  |  |  |  | 4,474
Non-accretable discount |  |  |  |  |  | 5,439
Accretable discount | $ 106 | 389 | 104 | 106 | $ 389 | 665
Changes in the accretable yield for purchased credit-impaired loans [Roll Forward] |  |  |  |  |  |
Balance at beginning of period | 106 | 389 |  |  |  |
Accretion | (95) | (632) |  |  |  |
Reclassification of non-accretable discount | 93 | 349 |  |  |  |
Balance at end of period | $ 104 | $ 106 |  |  |  |
Loans acquired with specific evidence of deterioration in credit quality [Abstract] |  |  |  |  |  |
Outstanding balance |  |  | 4,529 | 5,295 |  | $ 6,969
Carrying amount |  |  | $ 1,859 | $ 2,638 |  |

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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 The amount of the loan's contractually required payments receivable in excess of the amount of its cash flows expected to be collected. This relates to loans with deteriorating 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 No definition available. + 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=82894903&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=82894507&loc=d3e13503-111538 + Details
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- Definition The undiscounted sum of all amounts, including amounts deemed principal, interest, fees, penalties, and other under the loan, owed to the investor at the reporting date, whether or not currently due and whether or not any such amounts have been written or charged off by the investor. This relates to loans not accounted for as 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 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82894507&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)(1) -URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544 + Details
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- Definition The balance of financing receivables that were collectively evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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