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Offsetting Assets And Liabilities (Schedule Of Liabilities Subject To An Enforceable Master Netting Arrangement Or Repurchase Agreements)(Details) - Repurchase Agreements [Member] - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Offsetting Liabilities [Line Items]    
Gross Amounts of Recognized Liabilities $ 17,129 $ 9,999
Gross Amounts Offset in the Consolidated Balance Sheet
Net Amounts of Liabilities Presented in Consolidated Balance Sheet 17,129 9,999
Financial Instruments (17,129) (9,999)
Cash Collateral Pledged
Net Amount