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LOANS - Payment Defaults on TDR Loans (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) loan	Dec. 31, 2019 USD ($)
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	1	11
Troubled debt restructurings, recorded investment	$ 240	$ 530
Residential mortgage | Real estate loan | first liens
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	1
Troubled debt restructurings, recorded investment	$ 0	$ 261
Residential mortgage | Real estate loan | junior liens
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	1	1
Troubled debt restructurings, recorded investment	$ 240	$ 18
Commercial | Real estate loan
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | loan	1
Commercial | Commercial and industrial
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	8
Troubled debt restructurings, recorded investment	$ 0	$ 170
Commercial | Agricultural loans
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	1
Troubled debt restructurings, recorded investment	$ 0	$ 81

X

- Definition

Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953682-111524

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- Definition

Amount of financing receivable modified as troubled debt restructuring within previous 12 months, with subsequent payment default.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953682-111524

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