LOANS (Amortized Cost for Collateral-Dependent Loans by Class of Loans) (Details) $ in Thousands	Mar. 31, 2022 USD ($)
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Losses	$ 7,185
Commercial real estate
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Losses	4,899
Residential first mortgages
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Losses	736
Residential rentals
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Losses	672
Home equity and second mortgages
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Losses	377
Commercial equipment
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Losses	500
Business/Other Assets
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Losses	1,134
Business/Other Assets | Commercial real estate
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Losses	0
Business/Other Assets | Residential first mortgages
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Losses	0
Business/Other Assets | Residential rentals
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Losses	0
Business/Other Assets | Home equity and second mortgages
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Losses	0
Business/Other Assets | Commercial loans
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Losses	25
Business/Other Assets | Commercial equipment
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Losses	1,109
Real Estate
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Losses	7,184
Real Estate | Commercial real estate
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Losses	4,987
Real Estate | Residential first mortgages
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Losses	1,149
Real Estate | Residential rentals
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Losses	672
Real Estate | Home equity and second mortgages
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Losses	376
Real Estate | Commercial loans
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Losses	0
Real Estate | Commercial equipment
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Losses	$ 0