Derivative Financial Instruments (Summary Of Location And Amounts Of Derivative Fair Values In The Consolidated Balance Sheets) (Details) - Non-hedging derivatives [Member] - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Derivative [Line Items]
Liability Derivatives	$ 2,127	$ 4,854
Option contracts [Member] | Other liabilities [Member]
Derivative [Line Items]
Liability Derivatives	405	3
Total Return Swap [Member] | Other liabilities [Member]
Derivative [Line Items]
Liability Derivatives	$ 1,722	$ 4,851