LOANS - Additional information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Recorded Investment	$ 11,212,000	$ 11,734,000
Impaired Loans Required for Specific Reserves	972,000	291,000
With no related allowance, Recorded Investment	10,240,000	11,443,000
Allowance for Loan and Lease Losses, Period Increase (Decrease)	8,300,000
Allowance for Loan and Lease Losses Write-offs, Net	4,100,000	3,500,000
Aggregate Impaired Loans Required For Specific Reserves	413,000	87,000
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Past Due, Total	1,200,000	3,200,000
Nonaccrual Impaired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Recorded Investment	5,900,000	7,300,000
Accrual Impaired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Recorded Investment	6,200,000	4,400,000
Troubled Debt Restructurings [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Recorded Investment	9,400,000	6,900,000
Troubled Debt Restructuring Accrual Status [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Recorded Investment	6,200,000	4,400,000
Troubled Debt Restructuring Nonaccrual Status [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Recorded Investment	3,200,000	$ 2,500,000
Unused Lines of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Line of Credit Facility, Maximum Amount Outstanding During Period	$ 234,200,000