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LOANS HELD FOR INVESTMENT AND ALLOWANCE FOR CREDIT LOSSES (Portfolio Composition) (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Loan Portfolio Composition    
Loans Held for Investment $ 2,057,727 $ 2,006,426
Net deferred fees 1,600  
Commercial, Financial and Agricultural [Member]    
Loan Portfolio Composition    
Loans Held for Investment 413,819 393,930
Real Estate - Construction [Member]    
Loan Portfolio Composition    
Loans Held for Investment 138,104 135,831
Real Estate - Commercial Mortgage [Member]    
Loan Portfolio Composition    
Loans Held for Investment 669,158 648,393
Real Estate - Residential [Member]    
Loan Portfolio Composition    
Loans Held for Investment 365,931 352,543
Loans in Process with outstanding balances 8,300 10,900
Real Estate - Home Equity [Member]    
Loan Portfolio Composition    
Loans Held for Investment 202,099 205,479
Consumer [Member]    
Loan Portfolio Composition    
Loans Held for Investment 268,616 270,250
Overdraft Balances $ 900 $ 700