LOANS, Impaired Loans (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Impaired loans [Abstract]
Unpaid contractual principal balance	$ 17,999,000		$ 17,999,000		$ 17,925,000
Recorded investment [Abstract]
Recorded investment with no allowance	8,792,000		8,792,000		7,446,000
Recorded investment with allowance	8,605,000		8,605,000		10,025,000
Total recorded investment	17,397,000		17,397,000		17,471,000
Related allowance	4,081,000		4,081,000		2,347,000
Interest income on impaired loans recognized using an accrual method of accounting [Abstract]
Average recorded investment	17,822,000	$ 11,663,000	17,706,000	$ 9,267,000
Interest income recognized	17,000	30,000	31,000	75,000
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	56,000		56,000		1,087,000
Recorded investment [Abstract]
Recorded investment with no allowance	28,000		28,000		363,000
Recorded investment with allowance	0		0		661,000
Total recorded investment	28,000		28,000		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	156,000	1,468,000	445,000	1,529,000
Interest income recognized	6,000	14,000	7,000	35,000
Commercial Real Estate [Member]
Impaired loans [Abstract]
Unpaid contractual principal balance	7,051,000		7,051,000		5,146,000
Recorded investment [Abstract]
Recorded investment with no allowance	6,570,000		6,570,000		4,875,000
Recorded investment with allowance	0		0		0
Total recorded investment	6,570,000		6,570,000		4,875,000
Related allowance	0		0		0
Interest income on impaired loans recognized using an accrual method of accounting [Abstract]
Average recorded investment	6,687,000	3,231,000	6,083,000	2,393,000
Interest income recognized	0	0	0	4,000
Agriculture [Member]
Impaired loans [Abstract]
Unpaid contractual principal balance	9,189,000		9,189,000		9,189,000
Recorded investment [Abstract]
Recorded investment with no allowance	1,365,000		1,365,000		1,365,000
Recorded investment with allowance	7,765,000		7,765,000		7,765,000
Total recorded investment	9,130,000		9,130,000		9,130,000
Related allowance	3,990,000		3,990,000		2,093,000
Interest income on impaired loans recognized using an accrual method of accounting [Abstract]
Average recorded investment	9,130,000	4,572,000	9,130,000	3,048,000
Interest income recognized	0	0	0	0
Residential Mortgage [Member]
Impaired loans [Abstract]
Unpaid contractual principal balance	683,000		683,000		1,046,000
Recorded investment [Abstract]
Recorded investment with no allowance	144,000		144,000		153,000
Recorded investment with allowance	525,000		525,000		883,000
Total recorded investment	669,000		669,000		1,036,000
Related allowance	84,000		84,000		159,000
Interest income on impaired loans recognized using an accrual method of accounting [Abstract]
Average recorded investment	846,000	1,071,000	910,000	1,075,000
Interest income recognized	5,000	6,000	13,000	15,000
Residential Construction [Member]
Impaired loans [Abstract]
Unpaid contractual principal balance	250,000		250,000		684,000
Recorded investment [Abstract]
Recorded investment with no allowance	0		0		0
Recorded investment with allowance	251,000		251,000		652,000
Total recorded investment	251,000		251,000		652,000
Related allowance	4,000		4,000		83,000
Interest income on impaired loans recognized using an accrual method of accounting [Abstract]
Average recorded investment	253,000	676,000	386,000	681,000
Interest income recognized	4,000	9,000	8,000	18,000
Consumer [Member]
Impaired loans [Abstract]
Unpaid contractual principal balance	770,000		770,000		773,000
Recorded investment [Abstract]
Recorded investment with no allowance	685,000		685,000		690,000
Recorded investment with allowance	64,000		64,000		64,000
Total recorded investment	749,000		749,000		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	750,000	645,000	752,000	541,000
Interest income recognized	$ 2,000	$ 1,000	$ 3,000	$ 3,000