LOANS, Impaired Loans (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Impaired loans [Abstract]
Unpaid contractual principal balance	$ 14,667,000		$ 14,667,000		$ 17,925,000
Recorded investment [Abstract]
Recorded investment with no allowance	7,043,000		7,043,000		7,446,000
Recorded investment with allowance	5,796,000		5,796,000		10,025,000
Total recorded investment	12,839,000		12,839,000		17,471,000
Related allowance	910,000		910,000		2,347,000
Interest income on impaired loans recognized using an accrual method of accounting [Abstract]
Average recorded investment	15,118,000	$ 18,565,000	16,489,000	$ 11,477,000
Interest income recognized	478,000	49,000	507,000	123,000
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	33,000		33,000		1,087,000
Recorded investment [Abstract]
Recorded investment with no allowance	33,000		33,000		363,000
Recorded investment with allowance	0		0		661,000
Total recorded investment	33,000		33,000		1,024,000
Related allowance	0		0		11,000
Interest income on impaired loans recognized using an accrual method of accounting [Abstract]
Average recorded investment	30,000	1,291,000	342,000	1,424,000
Interest income recognized	0	15,000	7,000	50,000
Commercial Real Estate [Member]
Impaired loans [Abstract]
Unpaid contractual principal balance	2,081,000		2,081,000		5,146,000
Recorded investment [Abstract]
Recorded investment with no allowance	2,022,000		2,022,000		4,875,000
Recorded investment with allowance	0		0		0
Total recorded investment	2,022,000		2,022,000		4,875,000
Related allowance	0		0		0
Interest income on impaired loans recognized using an accrual method of accounting [Abstract]
Average recorded investment	4,297,000	5,549,000	5,068,000	3,142,000
Interest income recognized	466,000	5,000	466,000	9,000
Agriculture [Member]
Impaired loans [Abstract]
Unpaid contractual principal balance	10,779,000		10,779,000		9,189,000
Recorded investment [Abstract]
Recorded investment with no allowance	4,165,000		4,165,000		1,365,000
Recorded investment with allowance	4,965,000		4,965,000		7,765,000
Total recorded investment	9,130,000		9,130,000		9,130,000
Related allowance	818,000		818,000		2,093,000
Interest income on impaired loans recognized using an accrual method of accounting [Abstract]
Average recorded investment	9,130,000	9,137,000	9,130,000	4,569,000
Interest income recognized	0	0	0	0
Residential Mortgage [Member]
Impaired loans [Abstract]
Unpaid contractual principal balance	708,000		708,000		1,046,000
Recorded investment [Abstract]
Recorded investment with no allowance	142,000		142,000		153,000
Recorded investment with allowance	521,000		521,000		883,000
Total recorded investment	663,000		663,000		1,036,000
Related allowance	82,000		82,000		159,000
Interest income on impaired loans recognized using an accrual method of accounting [Abstract]
Average recorded investment	666,000	1,057,000	848,000	1,068,000
Interest income recognized	5,000	7,000	18,000	22,000
Residential Construction [Member]
Impaired loans [Abstract]
Unpaid contractual principal balance	246,000		246,000		684,000
Recorded investment [Abstract]
Recorded investment with no allowance	0		0		0
Recorded investment with allowance	246,000		246,000		652,000
Total recorded investment	246,000		246,000		652,000
Related allowance	7,000		7,000		83,000
Interest income on impaired loans recognized using an accrual method of accounting [Abstract]
Average recorded investment	248,000	666,000	351,000	676,000
Interest income recognized	4,000	8,000	11,000	26,000
Consumer [Member]
Impaired loans [Abstract]
Unpaid contractual principal balance	820,000		820,000		773,000
Recorded investment [Abstract]
Recorded investment with no allowance	681,000		681,000		690,000
Recorded investment with allowance	64,000		64,000		64,000
Total recorded investment	745,000		745,000		754,000
Related allowance	3,000		3,000		$ 1,000
Interest income on impaired loans recognized using an accrual method of accounting [Abstract]
Average recorded investment	747,000	865,000	750,000	598,000
Interest income recognized	$ 3,000	$ 14,000	$ 5,000	$ 16,000