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INVESTMENTS (Other Equity Securities) (Detail) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Other Securities Owned [Line Items]    
Federal Reserve Bank stock $ 8,382 $ 8,334
Total equity securities 39,853 46,094
Atlantic Central Bankers Bank Stock    
Other Securities Owned [Line Items]    
Federal Home Loan Bank of Atlanta stock $ 31,471 $ 37,760