LOANS, Impaired Loans (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Impaired loans [Abstract]
Unpaid contractual principal balance	$ 11,709,000		$ 11,709,000		$ 13,134,000
Recorded investment [Abstract]
Recorded investment with no allowance	8,474,000		8,474,000		10,197,000
Recorded investment with allowance	567,000		567,000		822,000
Total recorded investment	9,041,000		9,041,000		11,019,000
Related allowance	80,000		80,000		93,000
Interest income on impaired loans recognized using an accrual method of accounting [Abstract]
Average recorded investment	9,928,000	$ 15,118,000	10,183,000	$ 16,489,000
Interest income recognized	25,000	478,000	64,000	507,000
Risk Rating of 5 (Special Mention) or Worse [Member]
Impaired loans [Abstract]
Threshold aggregate exposure for loan to be considered impaired	500,000		500,000
Commercial [Member]
Impaired loans [Abstract]
Unpaid contractual principal balance	0		0		142,000
Recorded investment [Abstract]
Recorded investment with no allowance	0		0		133,000
Recorded investment with allowance	0		0		0
Total recorded investment	0		0		133,000
Related allowance	0		0		0
Interest income on impaired loans recognized using an accrual method of accounting [Abstract]
Average recorded investment	17,000	30,000	50,000	342,000
Interest income recognized	0	0	2,000	7,000
Commercial Real Estate [Member]
Impaired loans [Abstract]
Unpaid contractual principal balance	0		0		555,000
Recorded investment [Abstract]
Recorded investment with no allowance	0		0		555,000
Recorded investment with allowance	0		0		0
Total recorded investment	0		0		555,000
Related allowance	0		0		0
Interest income on impaired loans recognized using an accrual method of accounting [Abstract]
Average recorded investment	681,000	4,297,000	479,000	5,068,000
Interest income recognized	19,000	466,000	32,000	466,000
Agriculture [Member]
Impaired loans [Abstract]
Unpaid contractual principal balance	10,127,000		10,127,000		10,680,000
Recorded investment [Abstract]
Recorded investment with no allowance	7,625,000		7,625,000		8,712,000
Recorded investment with allowance	0		0		0
Total recorded investment	7,625,000		7,625,000		8,712,000
Related allowance	0		0		0
Interest income on impaired loans recognized using an accrual method of accounting [Abstract]
Average recorded investment	7,855,000	9,130,000	8,205,000	9,130,000
Interest income recognized	0	0	0	0
Residential Mortgage [Member]
Impaired loans [Abstract]
Unpaid contractual principal balance	680,000		680,000		701,000
Recorded investment [Abstract]
Recorded investment with no allowance	126,000		126,000		138,000
Recorded investment with allowance	503,000		503,000		517,000
Total recorded investment	629,000		629,000		655,000
Related allowance	76,000		76,000		81,000
Interest income on impaired loans recognized using an accrual method of accounting [Abstract]
Average recorded investment	634,000	666,000	643,000	848,000
Interest income recognized	5,000	5,000	14,000	18,000
Residential Construction [Member]
Impaired loans [Abstract]
Unpaid contractual principal balance	0		0		241,000
Recorded investment [Abstract]
Recorded investment with no allowance	0		0		0
Recorded investment with allowance	0		0		241,000
Total recorded investment	0		0		241,000
Related allowance	0		0		10,000
Interest income on impaired loans recognized using an accrual method of accounting [Abstract]
Average recorded investment	0	248,000	60,000	351,000
Interest income recognized	0	4,000	0	11,000
Consumer [Member]
Impaired loans [Abstract]
Unpaid contractual principal balance	902,000		902,000		815,000
Recorded investment [Abstract]
Recorded investment with no allowance	723,000		723,000		659,000
Recorded investment with allowance	64,000		64,000		64,000
Total recorded investment	787,000		787,000		723,000
Related allowance	4,000		4,000		$ 2,000
Interest income on impaired loans recognized using an accrual method of accounting [Abstract]
Average recorded investment	741,000	747,000	746,000	750,000
Interest income recognized	$ 1,000	$ 3,000	$ 16,000	$ 5,000