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Securities Available For Sale (Summary Of Realized Gains And Losses And Other-Than-Temporary Impairment Losses On Securities) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2016
Sep. 30, 2015
Securities Available For Sale [Abstract]      
Proceeds from Sale of Securities Available for Sale $ 21,776 $ 66,431 $ 20,428
Realized Gains 1,354 4,489 1,206
Net $ 1,354 $ 4,489 $ 1,206