LOANS (Troubled Debt Restructurings on Financing Receivables) (Details) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021 USD ($) tDR_Loan	Dec. 31, 2020 USD ($) tDR_Loan
Financing Receivable, Impaired [Line Items]
Financing receivable post modification recorded investment | $	$ 455	$ 2,094
Less: TDRs included in non-accrual loans | $	0	(1,522)
Accrual TDR loans | $	$ 455	$ 572
Number of TDR loans | tDR_Loan	1	6
Number of non-accrual TDR loans | tDR_Loan	0	(3)
Number of accrual TDR loans | tDR_Loan	1	3
Commercial real estate
Financing Receivable, Impaired [Line Items]
Financing receivable post modification recorded investment | $	$ 0	$ 1,376
Number of TDR loans | tDR_Loan	0	2
Residential first mortgages
Financing Receivable, Impaired [Line Items]
Financing receivable post modification recorded investment | $	$ 0	$ 247
Number of TDR loans | tDR_Loan	0	2
Commercial equipment
Financing Receivable, Impaired [Line Items]
Financing receivable post modification recorded investment | $	$ 455	$ 471
Number of TDR loans | tDR_Loan	1	2