LOANS AND LEASES - Financial Difficulty Modifications, Payment Status (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2023 USD ($)
Financing Receivable, Past Due [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	$ 400	$ 600
Financial Receivables, Financial Difficulty Modifications	8,506	8,506
Financial Receivables, Financial Difficulty Modifications	8,506	8,506
Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Financial Receivables, Financial Difficulty Modifications	7,911	7,911
Financial Receivables, Financial Difficulty Modifications	7,911	7,911
Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financial Receivables, Financial Difficulty Modifications	538	538
Financial Receivables, Financial Difficulty Modifications	538	538
Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financial Receivables, Financial Difficulty Modifications	0	0
Financial Receivables, Financial Difficulty Modifications	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financial Receivables, Financial Difficulty Modifications	57	57
Financial Receivables, Financial Difficulty Modifications	57	57
Residential Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Financial Receivables, Financial Difficulty Modifications	1,929	1,929
Financial Receivables, Financial Difficulty Modifications	1,929	1,929
Residential Portfolio Segment [Member] | Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Financial Receivables, Financial Difficulty Modifications	1,334	1,334
Financial Receivables, Financial Difficulty Modifications	1,334	1,334
Residential Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financial Receivables, Financial Difficulty Modifications	538	538
Financial Receivables, Financial Difficulty Modifications	538	538
Residential Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financial Receivables, Financial Difficulty Modifications	0	0
Financial Receivables, Financial Difficulty Modifications	0	0
Residential Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financial Receivables, Financial Difficulty Modifications	57	57
Financial Receivables, Financial Difficulty Modifications	57	57
Home equity
Financing Receivable, Past Due [Line Items]
Financial Receivables, Financial Difficulty Modifications	182	182
Financial Receivables, Financial Difficulty Modifications	182	182
Home equity | Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Financial Receivables, Financial Difficulty Modifications	182	182
Financial Receivables, Financial Difficulty Modifications	182	182
Home equity | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financial Receivables, Financial Difficulty Modifications	0	0
Financial Receivables, Financial Difficulty Modifications	0	0
Home equity | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financial Receivables, Financial Difficulty Modifications	0	0
Financial Receivables, Financial Difficulty Modifications	0	0
Home equity | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financial Receivables, Financial Difficulty Modifications	0	0
Financial Receivables, Financial Difficulty Modifications	0	0
Commercial
Financing Receivable, Past Due [Line Items]
Financial Receivables, Financial Difficulty Modifications	6,395	6,395
Financial Receivables, Financial Difficulty Modifications	6,395	6,395
Commercial | Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Financial Receivables, Financial Difficulty Modifications	6,395	6,395
Financial Receivables, Financial Difficulty Modifications	6,395	6,395
Commercial | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financial Receivables, Financial Difficulty Modifications	0	0
Financial Receivables, Financial Difficulty Modifications	0	0
Commercial | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financial Receivables, Financial Difficulty Modifications	0	0
Financial Receivables, Financial Difficulty Modifications	0	0
Commercial | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financial Receivables, Financial Difficulty Modifications	0	0
Financial Receivables, Financial Difficulty Modifications	$ 0	$ 0