LOANS AND THE ALLOWANCE FOR LOAN LOSSES - Summary of unpaid principal balance of loans classified as TDRs (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) loan	Dec. 31, 2019 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as TDRs	$ 3,577
Total Recorded Investment	4,058	$ 12,270
Allowance for loan associated with TDR	(1,621)	(833)
Allowance for loan losses associated with TDR	(1,619)
Net recorded investment	$ 1,958	11,437
Additional funds to loans classified as TDRs		$ 200
Number of loans classified as TDRs | loan	1	2
Cash, Securities and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Recorded Investment	$ 50	$ 2,803
Allowance for loan associated with TDR	(2)
Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Recorded Investment	3,529	9,467
Allowance for loan associated with TDR	(1,619)	(833)
Accrual Loans | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Recorded Investment		5,055
Loans on nonaccrual status | Cash, Securities and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as TDRs	48
Total Recorded Investment		2,803
Loans on nonaccrual status | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as TDRs	$ 3,529
Total Recorded Investment		$ 4,412