LOANS (Schedule of Financing Receivables, Non-Accrual Status) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual delinquent loans	$ 1,399	$ 11,965
Non-accrual current loans	3,761	6,257
Total non-accrual loans	5,160	18,222
Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual delinquent loans	758	11,428
Non-accrual current loans	2,378	5,184
Total non-accrual loans	3,136	16,612
Residential first mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual delinquent loans	182	335
Non-accrual current loans	269	459
Total non-accrual loans	451	794
Residential rentals
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual delinquent loans	257	0
Non-accrual current loans	704	275
Total non-accrual loans	961	275
Home equity and second mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual delinquent loans	202	202
Non-accrual current loans	378	293
Total non-accrual loans	580	495
Commercial equipment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual delinquent loans	0	0
Non-accrual current loans	32	46
Total non-accrual loans	$ 32	$ 46