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Securities - Amortized Cost And Approximate Fair Value Of Securities Held-To-Maturity (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Investments [Abstract]    
Total securities held to maturity, amortized cost $ 8,654 $ 11,618
Gross Unrealized Gains 174 123
Gross Unrealized Losses 0 (2)
Securities held to maturity, fair value $ 8,828 $ 11,739