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Deferred Charges, Goodwill And Other Assets, Net (Schedule Of Fair Value Of The Derivative Financial Instruments) (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Designated as Hedging Instrument [Member] | Interest Rate Swaps [Member] | Deferred Charges, Goodwill And Other Assets [Member] | Cash Flow Hedging [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Asset Derivatives $ 5,723 $ 10,175