Securities Available For Sale (Schedule Of Maturities Distribution Of The Amortized Cost And Estimated Fair Value Of Securities Available For Sale) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Securities Available For Sale [Abstract]
Amortized Cost, Due one year of less	$ 3
Amortized Cost, Due after one year through five years	8,064
Amortized Cost, Due after five years through ten years	19,905
Amortized Cost, Due after ten years	394,005
Securities Available for Sale, Amortized Cost	421,977	405,769
Estimated Fair Value, Due one year of less	3
Estimated Fair Value, Due after one year through five years	8,234
Estimated Fair Value, Due after five years through ten years	20,804
Estimated Fair Value, Due after ten years	387,196
Securities Available for Sale, Estimated Fair Value	$ 416,237	$ 418,040