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INVESTMENT SECURITIES (Narrative) (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]          
Called investment securities     $ 7,711,000 $ 7,363,000  
Investment securities fair values with temporary impairments $ 97,100,000   $ 97,100,000    
Other than temporary impairment performing collateral will default or defer per annum     0.50%    
Recoveries ranging     9.00%    
Lag period on all default and deferrals     2 years    
Period of no prepayments for security     10 years    
Percentage of prepayments for remaining life of the security     1.00%    
OTTI charges related to credit 0 $ 0 $ 0 $ 0  
Purchases of available for sale investment securities 9,800,000   25,110,000    
Federal Home Loan Bank of Atlanta [Member]          
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]          
Securities pledged for collateral $ 152,600,000   $ 152,600,000   $ 165,700,000