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Investment Securities (Scheduled Maturities Of Securities Available For Sale And Securities Held To Maturity) (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
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Investments [Abstract] |  |
Debt securities available for sale, Due in one year or less, Amortized Cost | $ 26,364 |
Debt securities available for sale, Due from one to five years, Amortized Cost | 144,174 |
Debt securities available for sale, Due after five years through ten years, Amortized Cost | 238,443 |
Debt securities available for sale, Due after ten years, Amortized Cost | 98,618 |
Debt securities available for sale, Amortized Cost | 507,599 |
Debt securities available for sale, Due in one year or less, Fair Value | 26,197 |
Debt securities available for sale, Due from one to five years, Fair Value | 140,856 |
Debt securities available for sale, Due after five years through ten years, Fair Value | 229,545 |
Debt securities available for sale, Due after ten years, Fair Value | 95,630 |
Debt securities available for sale, Fair Value | 492,228 |
Debt securities held to maturity, Due in one year or less, Amortized Cost | 55,989 |
Debt securities held to maturity, Due from one to five years, Amortized Cost | 151,052 |
Debt securities held to maturity, Due after five years through ten years, Amortized Cost | 88,698 |
Debt securities held to maturity, Due after ten years, Amortized Cost | 179,064 |
Securities held to maturity, Amortized Cost | 474,803 | $ 516,466
Debt securities held to maturity, Due in one year or less, Fair Value | 56,177 |
Debt securities held to maturity, Due from one to five years, Fair Value | 151,799 |
Debt securities held to maturity, Due after five years through ten years, Fair Value | 85,681 |
Debt securities held to maturity, Due after ten years, Fair Value | 171,885 |
Securities held to maturity, Fair Value | $ 465,542 | $ 512,983

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