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Investment Securities (Scheduled Maturities Of Securities Available For Sale And Securities Held To Maturity) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Investments [Abstract]
Debt securities available for sale, Due in one year or less, Amortized Cost	$ 28,200
Debt securities available for sale, Due from one to five years, Amortized Cost	137,192
Debt securities available for sale, Due after five years through ten years, Amortized Cost	183,515
Debt securities available for sale, Due after ten years, Amortized Cost	81,307
Securities available for sale, Amortized Cost	430,214	$ 455,582
Debt securities available for sale, Due in one year or less, Fair Value	28,009
Debt securities available for sale, Due from one to five years, Fair Value	136,577
Debt securities available for sale, Due after five years through ten years, Fair Value	182,284
Debt securities available for sale, Due after ten years, Fair Value	80,675
Debt securities available for sale, Fair Value	427,545	445,677
Debt securities held to maturity, Due in one year or less, Amortized Cost	49,502
Debt securities held to maturity, Due from one to five years, Amortized Cost	147,735
Debt securities held to maturity, Due after five years through ten years, Amortized Cost	74,536
Debt securities held to maturity, Due after ten years, Amortized Cost	167,211
Securities held to maturity, Amortized Cost	438,984	446,581
Debt securities held to maturity, Due in one year or less, Fair Value	49,598
Debt securities held to maturity, Due from one to five years, Fair Value	149,579
Debt securities held to maturity, Due after five years through ten years, Fair Value	73,735
Debt securities held to maturity, Due after ten years, Fair Value	164,062
Securities held to maturity, Fair Value	$ 436,974	$ 439,581

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