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 |
9 Months Ended |
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
|
|
| Net unrealized loss on derivative instruments |
$ 1,283
|
$ 172
|
$ 8,938
|
$ (1,322)
|
| Interest Expense [Member] |
|
|
|
|
| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
|
|
| Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) |
929
|
(558)
|
1,650
|
(1,926)
|
| 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) |
$ 47
|
$ 6
|
$ (127)
|
$ (26)
|