Quarterly report pursuant to Section 13 or 15(d)

LOANS HELD FOR INVESTMENT AND ALLOWANCE FOR CREDIT LOSSES (Collateral-dependent loans) (Details)

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LOANS HELD FOR INVESTMENT AND ALLOWANCE FOR CREDIT LOSSES (Collateral-dependent loans) (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Loans and Leases Receivable Disclosure [Line Items]    
Collateral-dependent loans $ 2,600 $ 7,100
Real estate secured [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Collateral-dependent loans 2,556 7,141
Non real estate secured [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Collateral-dependent loans 0 29
Commercial, Financial and Agricultural [Member] | Real estate secured [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Collateral-dependent loans 0 0
Commercial, Financial and Agricultural [Member] | Non real estate secured [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Collateral-dependent loans 0 0
Real Estate - Commercial Mortgage [Member] | Real estate secured [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Collateral-dependent loans 0 3,900
Real Estate - Commercial Mortgage [Member] | Non real estate secured [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Collateral-dependent loans 0 0
Real Estate - Residential [Member] | Real estate secured [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Collateral-dependent loans 1,891 3,022
Real Estate - Residential [Member] | Non real estate secured [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Collateral-dependent loans 0 0
Real Estate - Home Equity [Member] | Real estate secured [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Collateral-dependent loans 665 219
Real Estate - Home Equity [Member] | Non real estate secured [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Collateral-dependent loans 0 0
Consumer [Member] | Real estate secured [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Collateral-dependent loans 0 0
Consumer [Member] | Non real estate secured [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Collateral-dependent loans $ 0 $ 29