LOANS, Non-accrual and Past Due Loans (Details)	Jun. 30, 2021 USD ($) Loan	Dec. 31, 2020 USD ($) Loan	Jun. 30, 2020 USD ($)
Non-accrual and Past Due Loans [Abstract]
Total Loans	$ 891,711,000	$ 893,214,000	$ 998,826,000
Nonaccrual	16,557,000	15,211,000
Commitments to lend additional funds to borrower whose loan was on non-accrual status	0
Current & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	875,138,000	878,003,000
30-59 Days Past Due & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	16,000	0
60-89 Days Past Due & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	0	0
90 Days or More Past Due & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	0	0
Commercial [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	224,897,000	255,926,000	334,318,000
Nonaccrual	$ 28,000	$ 363,000
Number of nonaccrual loans | Loan	1	4
Commercial [Member] | Current & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	$ 224,869,000	$ 255,563,000
Commercial [Member] | 30-59 Days Past Due & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	0	0
Commercial [Member] | 60-89 Days Past Due & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	0	0
Commercial [Member] | 90 Days or More Past Due & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	0	0
Commercial Real Estate [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	483,005,000	454,053,000	459,498,000
Nonaccrual	$ 6,570,000	$ 4,875,000
Number of nonaccrual loans | Loan	4	3
Commercial Real Estate [Member] | Current & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	$ 476,435,000	$ 449,178,000
Commercial Real Estate [Member] | 30-59 Days Past Due & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	0	0
Commercial Real Estate [Member] | 60-89 Days Past Due & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	0	0
Commercial Real Estate [Member] | 90 Days or More Past Due & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	0	0
Agriculture [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	86,842,000	95,048,000	96,330,000
Nonaccrual	$ 9,130,000	$ 9,130,000
Number of nonaccrual loans | Loan	3	3
Agriculture [Member] | Current & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	$ 77,696,000	$ 85,918,000
Agriculture [Member] | 30-59 Days Past Due & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	16,000	0
Agriculture [Member] | 60-89 Days Past Due & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	0	0
Agriculture [Member] | 90 Days or More Past Due & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	0	0
Residential Mortgage [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	74,018,000	64,497,000	69,687,000
Nonaccrual	$ 144,000	$ 153,000
Number of nonaccrual loans | Loan	1	1
Residential Mortgage [Member] | Current & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	$ 73,874,000	$ 64,344,000
Residential Mortgage [Member] | 30-59 Days Past Due & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	0	0
Residential Mortgage [Member] | 60-89 Days Past Due & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	0	0
Residential Mortgage [Member] | 90 Days or More Past Due & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	0	0
Residential Construction [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	3,985,000	4,223,000	15,969,000
Nonaccrual	0	0
Residential Construction [Member] | Current & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	3,985,000	4,223,000
Residential Construction [Member] | 30-59 Days Past Due & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	0	0
Residential Construction [Member] | 60-89 Days Past Due & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	0	0
Residential Construction [Member] | 90 Days or More Past Due & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	0	0
Consumer [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	18,964,000	19,467,000	$ 23,024,000
Nonaccrual	$ 685,000	$ 690,000
Number of nonaccrual loans | Loan	3	5
Consumer [Member] | Current & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	$ 18,279,000	$ 18,777,000
Consumer [Member] | 30-59 Days Past Due & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	0	0
Consumer [Member] | 60-89 Days Past Due & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	0	0
Consumer [Member] | 90 Days or More Past Due & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	$ 0	$ 0