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LOANS AND RELATED ALLOWANCE FOR LOAN LOSSES, Past Due (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Recorded investment of past due [Abstract] |  |  |
Total past due | $ 15,546 | $ 12,204 |
Current | 1,064,478 | 985,683 |
PCI | 1,859 | 2,638 |
Total financing receivables | 1,081,883 | 1,000,525 |
90 Days past due and accruing | 68 | 555 |
Financing receivables on nonaccrual status [Abstract] |  |  |
Total past due and non-accrual | 12,170 | 8,160 |
Current and non-accrual | 1,554 | 2,011 |
PCI Loans considered non accrual | 0 | 0 |
Financing receivable nonaccrual status | 13,724 | 10,171 |
Foregone interest income | 961 | 709 | $ 603
Financing receivables on accrual status [Abstract] |  |  |
Total past due and still accruing | 3,376 | 4,044 |
Current and still accruing | 1,062,924 | 983,672 |
PCI Loans still accruing | 1,859 | 2,638 |
Total financing receivables and still accruing | $ 1,068,159 | 990,354 |
Minimum [Member] |  |  |
Financing receivables on nonaccrual status [Abstract] |  |  |
Period of past due after which loans considered as non accrual | 90 days |  |
30 to 59 Days Past Due [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | $ 2,038 | 3,053 |
Financing receivables on nonaccrual status [Abstract] |  |  |
Total past due and non-accrual | 72 | 816 |
Financing receivables on accrual status [Abstract] |  |  |
Total past due and still accruing | 1,966 | 2,237 |
60 to 89 Days Past Due [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 1,595 | 1,533 |
Financing receivables on nonaccrual status [Abstract] |  |  |
Total past due and non-accrual | 253 | 281 |
Financing receivables on accrual status [Abstract] |  |  |
Total past due and still accruing | 1,342 | 1,252 |
90 Days Or Greater [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 11,913 | 7,618 |
Financing receivables on nonaccrual status [Abstract] |  |  |
Total past due and non-accrual | 11,845 | 7,063 |
Financing receivables on accrual status [Abstract] |  |  |
Total past due and still accruing | 68 | 555 |
Real Estate Loans [Member] | Mortgages [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 1,958 | 2,168 |
Current | 154,501 | 152,144 |
PCI | 28 | 33 |
Total financing receivables | 156,487 | 154,345 |
90 Days past due and accruing | 20 | 218 |
Financing receivables on nonaccrual status [Abstract] |  |  |
Financing receivable nonaccrual status | 1,079 | 1,274 |
Real Estate Loans [Member] | Mortgages [Member] | 30 to 59 Days Past Due [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 483 | 996 |
Real Estate Loans [Member] | Mortgages [Member] | 60 to 89 Days Past Due [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 789 | 362 |
Real Estate Loans [Member] | Mortgages [Member] | 90 Days Or Greater [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 686 | 810 |
Real Estate Loans [Member] | Home Equity [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 428 | 441 |
Current | 58,390 | 59,693 |
PCI | 0 | 0 |
Total financing receivables | 58,818 | 60,134 |
90 Days past due and accruing | 0 | 0 |
Financing receivables on nonaccrual status [Abstract] |  |  |
Financing receivable nonaccrual status | 82 | 112 |
Real Estate Loans [Member] | Home Equity [Member] | 30 to 59 Days Past Due [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 257 | 277 |
Real Estate Loans [Member] | Home Equity [Member] | 60 to 89 Days Past Due [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 108 | 86 |
Real Estate Loans [Member] | Home Equity [Member] | 90 Days Or Greater [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 63 | 78 |
Real Estate Loans [Member] | Commercial [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 6,336 | 6,228 |
Current | 311,608 | 300,396 |
PCI | 1,321 | 1,460 |
Total financing receivables | 319,265 | 308,084 |
90 Days past due and accruing | 36 | 162 |
Financing receivables on nonaccrual status [Abstract] |  |  |
Financing receivable nonaccrual status | 5,957 | 5,192 |
Real Estate Loans [Member] | Commercial [Member] | 30 to 59 Days Past Due [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 999 | 1,353 |
Real Estate Loans [Member] | Commercial [Member] | 60 to 89 Days Past Due [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 631 | 1,010 |
Real Estate Loans [Member] | Commercial [Member] | 90 Days Or Greater [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 4,706 | 3,865 |
Real Estate Loans [Member] | Agricultural [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 3,305 | 447 |
Current | 281,215 | 238,808 |
PCI | 0 | 702 |
Total financing receivables | 284,520 | 239,957 |
90 Days past due and accruing | 0 | 30 |
Financing receivables on nonaccrual status [Abstract] |  |  |
Financing receivable nonaccrual status | 3,206 | 175 |
Real Estate Loans [Member] | Agricultural [Member] | 30 to 59 Days Past Due [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 121 | 242 |
Real Estate Loans [Member] | Agricultural [Member] | 60 to 89 Days Past Due [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 0 | 0 |
Real Estate Loans [Member] | Agricultural [Member] | 90 Days Or Greater [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 3,184 | 205 |
Real Estate Loans [Member] | Construction [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 0 | 133 |
Current | 33,913 | 13,369 |
PCI | 0 | 0 |
Total financing receivables | 33,913 | 13,502 |
90 Days past due and accruing | 0 | 0 |
Financing receivables on nonaccrual status [Abstract] |  |  |
Financing receivable nonaccrual status | 0 | 133 |
Real Estate Loans [Member] | Construction [Member] | 30 to 59 Days Past Due [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 0 | 0 |
Real Estate Loans [Member] | Construction [Member] | 60 to 89 Days Past Due [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 0 | 0 |
Real Estate Loans [Member] | Construction [Member] | 90 Days Or Greater [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 0 | 133 |
Consumer [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 63 | 135 |
Current | 9,795 | 9,809 |
PCI | 0 | 0 |
Total financing receivables | 9,858 | 9,944 |
90 Days past due and accruing | 12 | 7 |
Financing receivables on nonaccrual status [Abstract] |  |  |
Financing receivable nonaccrual status | 14 | 42 |
Consumer [Member] | 30 to 59 Days Past Due [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 37 | 53 |
Consumer [Member] | 60 to 89 Days Past Due [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 14 | 33 |
Consumer [Member] | 90 Days Or Greater [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 12 | 49 |
Other Commercial Loans [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 2,255 | 2,504 |
Current | 71,353 | 69,066 |
PCI | 510 | 443 |
Total financing receivables | 74,118 | 72,013 |
90 Days past due and accruing | 0 | 32 |
Financing receivables on nonaccrual status [Abstract] |  |  |
Financing receivable nonaccrual status | 2,185 | 2,637 |
Other Commercial Loans [Member] | 30 to 59 Days Past Due [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 141 | 132 |
Other Commercial Loans [Member] | 60 to 89 Days Past Due [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 53 | 0 |
Other Commercial Loans [Member] | 90 Days Or Greater [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 2,061 | 2,372 |
Other Agricultural Loans [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 1,201 | 148 |
Current | 40,985 | 37,661 |
PCI | 0 | 0 |
Total financing receivables | 42,186 | 37,809 |
90 Days past due and accruing | 0 | 106 |
Financing receivables on nonaccrual status [Abstract] |  |  |
Financing receivable nonaccrual status | 1,201 | 606 |
Other Agricultural Loans [Member] | 30 to 59 Days Past Due [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 0 | 0 |
Other Agricultural Loans [Member] | 60 to 89 Days Past Due [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 0 | 42 |
Other Agricultural Loans [Member] | 90 Days Or Greater [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 1,201 | 106 |
State and Political Subdivision Loans [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 0 | 0 |
Current | 102,718 | 104,737 |
PCI | 0 | 0 |
Total financing receivables | 102,718 | 104,737 |
90 Days past due and accruing | 0 | 0 |
State and Political Subdivision Loans [Member] | 30 to 59 Days Past Due [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 0 | 0 |
State and Political Subdivision Loans [Member] | 60 to 89 Days Past Due [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | 0 | 0 |
State and Political Subdivision Loans [Member] | 90 Days Or Greater [Member] |  |  |
Recorded investment of past due [Abstract] |  |  |
Total past due | $ 0 | $ 0 |

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