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Investment Securities (Scheduled Maturities Of Securities Available For Sale And Securities Held To Maturity) (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
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Investments [Abstract] |  |
Debt securities available for sale, Due in one year or less, Amortized Cost | $ 35,676 |
Debt securities available for sale, Due from one to five years, Amortized Cost | 139,223 |
Debt securities available for sale, Due after five years through ten years, Amortized Cost | 214,640 |
Debt securities available for sale, Due after ten years, Amortized Cost | 86,579 |
Debt securities available for sale, Amortized Cost | 476,118 |
Debt securities available for sale, Due in one year or less, Fair Value | 35,471 |
Debt securities available for sale, Due from one to five years, Fair Value | 135,043 |
Debt securities available for sale, Due after five years through ten years, Fair Value | 204,681 |
Debt securities available for sale, Due after ten years, Fair Value | 83,115 |
Debt securities available for sale, Fair Value | 458,310 |
Debt securities held to maturity, Due in one year or less, Amortized Cost | 49,829 |
Debt securities held to maturity, Due from one to five years, Amortized Cost | 150,749 |
Debt securities held to maturity, Due after five years through ten years, Amortized Cost | 83,277 |
Debt securities held to maturity, Due after ten years, Amortized Cost | 175,768 |
Securities held to maturity, Amortized Cost | 459,623 | $ 516,466
Debt securities held to maturity, Due in one year or less, Fair Value | 49,878 |
Debt securities held to maturity, Due from one to five years, Fair Value | 150,479 |
Debt securities held to maturity, Due after five years through ten years, Fair Value | 79,898 |
Debt securities held to maturity, Due after ten years, Fair Value | 167,463 |
Securities held to maturity, Fair Value | $ 447,718 | $ 512,983

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