Quarterly report pursuant to Section 13 or 15(d)

Deferred Charges, Goodwill And Other Assets, Net (Schedule Of Cash Flow Hedging, Derivative Financial Instruments On The Income Statement) (Details)

v3.10.0.1
Deferred Charges, Goodwill And Other Assets, Net (Schedule Of Cash Flow Hedging, Derivative Financial Instruments On The Income Statement) (Details) - Not Designated as Hedging Instrument [Member] - Interest Rate Swaps [Member] - Cash Flow Hedging [Member] - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion) $ 2,428 $ (2,129) $ 7,654 $ (1,494)
Interest Expense [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) 640 (776) 720 (1,368)
Interest And Other Investment Income (Loss) [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion, Reclassification for Forecasted Transactions No Longer Probable of Occurring and Amount Excluded from Effectiveness Testing) $ (100) $ 11 $ (174) $ (32)