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INVESTMENT SECURITIES (Amortized Cost and Estimated Fair Values of Securities) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]    
Available for sale, Amortized Cost, Total $ 165,462 $ 212,284
Securities Pledged as Collateral [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale, Amortized Cost, Total 140,042 121,142
Available-for-sale, Pledged available-for-sale securities, Estimated Fair Value $ 138,875 $ 121,207