LOANS, Non-accrual and Past Due Loans (Details)	Sep. 30, 2021 USD ($) Loan	Dec. 31, 2020 USD ($) Loan	Sep. 30, 2020 USD ($)
Non-accrual and Past Due Loans [Abstract]
Total Loans	$ 839,488,000	$ 893,214,000	$ 983,973,000
Nonaccrual	12,008,000	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	825,227,000	878,003,000
30-59 Days Past Due & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	2,003,000	0
60-89 Days Past Due & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	250,000	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	165,661,000	255,926,000	331,445,000
Nonaccrual	$ 33,000	$ 363,000
Number of nonaccrual loans | Loan	1	4
Commercial [Member] | Current & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	$ 163,418,000	$ 255,563,000
Commercial [Member] | 30-59 Days Past Due & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	1,960,000	0
Commercial [Member] | 60-89 Days Past Due & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	250,000	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	484,840,000	454,053,000	456,237,000
Nonaccrual	$ 2,022,000	$ 4,875,000
Number of nonaccrual loans | Loan	2	3
Commercial Real Estate [Member] | Current & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	$ 482,818,000	$ 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	90,821,000	95,048,000	102,045,000
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	$ 81,691,000	$ 85,918,000
Agriculture [Member] | 30-59 Days Past Due & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	0	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	75,200,000	64,497,000	67,240,000
Nonaccrual	$ 142,000	$ 153,000
Number of nonaccrual loans | Loan	1	1
Residential Mortgage [Member] | Current & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	$ 75,058,000	$ 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	5,174,000	4,223,000	6,610,000
Nonaccrual	0	0
Residential Construction [Member] | Current & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	5,169,000	4,223,000
Residential Construction [Member] | 30-59 Days Past Due & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	5,000	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	17,792,000	19,467,000	$ 20,396,000
Nonaccrual	$ 681,000	$ 690,000
Number of nonaccrual loans | Loan	3	5
Consumer [Member] | Current & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	$ 17,073,000	$ 18,777,000
Consumer [Member] | 30-59 Days Past Due & Accruing [Member]
Non-accrual and Past Due Loans [Abstract]
Total Loans	38,000	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