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Other Assets And Deferred Charges, Net (Narrative) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Other Assets And Deferred Charges, Net [Abstract]      
Amortization expense of deferred charges $ 5.2 $ 5.6 $ 5.2
Accumulated amortization of deferred lease origination costs 25.6    
Accumulated amortization of deferred financing costs $ 6.9