LOANS AND THE ALLOWANCE FOR LOAN LOSSES - Summary of unpaid principal balance of loans classified as TDRs (Details) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2020 USD ($) loan	Jun. 30, 2020 USD ($) loan	Dec. 31, 2019 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Recorded Investment	$ 11,454	$ 11,454	$ 12,270
Allowance for loan associated with TDR	(1,179)	(1,179)	(833)
Net recorded investment	10,275	10,275	11,437
Additional funds to loans classified as TDRs	800	800	$ 200
Cash collateral received	$ 1,500	$ 1,500
Number of contracts modified | loan	1	1	2
Cash, Securities and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Recorded Investment	$ 1,493	$ 1,493	$ 2,803
Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Recorded Investment	9,961	9,961	9,467
Allowance for loan associated with TDR	(1,179)	(1,179)	(833)
Accrual Loans | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Recorded Investment	5,636	5,636	5,055
Loans on nonaccrual status | Cash, Securities and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Recorded Investment	1,493	1,493	2,803
Loans on nonaccrual status | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Recorded Investment	$ 4,325	$ 4,325	$ 4,412