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OTHER BORROWINGS - Federal Home Loan Bank (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
May 31, 2020
Dec. 31, 2019
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]      
Advances from Federal Home Loan Banks     $ 0
Federal Home Loan Bank of San Francisco [Member]      
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]      
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances   $ 10,000  
Federal Home Loan Bank of San Francisco [Member] | Federal Home Loan Bank of San Francisco, Secured Borrowing Facility [Member]      
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]      
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, General Description of Terms The Company has an approved secured borrowing facility with the FHLB for up to 25% of total assets for a term not to exceed five years under a blanket lien of certain types of loans.    
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Percentage of Total Assets 25.00%    
Debt Instrument, Term 5 years    
Federal Home Loan Bank of San Francisco [Member] | Federal Home Loan Bank of San Francisco, Advance, Maturing November 9, 2020 [Member]      
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]      
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances   $ 5,000  
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Due Date   2020  
Federal Home Loan Bank of San Francisco [Member] | Federal Home Loan Bank of San Francisco, Advance, Maturing May 7, 2021 [Member]      
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]      
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances   $ 5,000  
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Due Date   2021