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COMMITMENTS AND CONTINGENCIES (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Standby letters of credit    
COMMITMENTS AND CONTINGENCIES    
Financial instruments off-balance sheet credit risks $ 10,031 $ 8,991
Commitments to extend credit    
COMMITMENTS AND CONTINGENCIES    
Financial instruments off-balance sheet credit risks $ 530,191 $ 542,705