Investment Securities (Scheduled Maturities Of Securities Available For Sale And Securities Held To Maturity) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Investments [Abstract]
Debt securities available for sale, Due in one year or less, Amortized Cost	$ 40,353
Debt securities available for sale, Due from one to five years, Amortized Cost	143,746
Debt securities available for sale, Due after five years through ten years, Amortized Cost	187,690
Debt securities available for sale, Due after ten years, Amortized Cost	83,793
Securities available for sale, Amortized Cost	455,582	$ 528,458
Debt securities available for sale, Due in one year or less, Fair Value	40,005
Debt securities available for sale, Due from one to five years, Fair Value	141,408
Debt securities available for sale, Due after five years through ten years, Fair Value	182,642
Debt securities available for sale, Due after ten years, Fair Value	81,622
Debt securities available for sale, Fair Value	445,677	524,973
Debt securities held to maturity, Due in one year or less, Amortized Cost	48,079
Debt securities held to maturity, Due from one to five years, Amortized Cost	149,885
Debt securities held to maturity, Due after five years through ten years, Amortized Cost	76,754
Debt securities held to maturity, Due after ten years, Amortized Cost	171,863
Securities held to maturity, Amortized Cost	446,581	516,466
Debt securities held to maturity, Due in one year or less, Fair Value	48,143
Debt securities held to maturity, Due from one to five years, Fair Value	150,339
Debt securities held to maturity, Due after five years through ten years, Fair Value	74,641
Debt securities held to maturity, Due after ten years, Fair Value	166,458
Securities held to maturity, Fair Value	$ 439,581	$ 512,983