COMMITMENTS, CONTINGENCIES, AND CREDIT RISK - CREDIT RISK (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Concentration of Credit Risk
Loan portfolio	$ 1,071,776	$ 1,053,468
Commercial real estate
Concentration of Credit Risk
Loan portfolio		513,205
Bank \| Commercial real estate \| Commercial loan portfolio \| Credit risk concentration
Concentration of Credit Risk
Loan portfolio	$ 138,992	$ 141,965
Percentage of concentration risk under a specified benchmark	16.95%	18.54%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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