| **Long-Term Debt And Loans Payable (Schedule Of Long-Term Debt Future Sinking Fund Payments And Debt Maturities) (Details) $ in Thousands** | Dec. 31, 2018 USD ($) |
|---------------------------------------------------------------------------------------------------------------------------------------------|-----------------------|
| **Debt Instrument [Line Items]**                                                                                                            |                  |
| 2019                                                                                                                                        | $ 144,545             |
| 2020                                                                                                                                        | 92,758                |
| 2021                                                                                                                                        | 38,561                |
| 2022                                                                                                                                        | 25,210                |
| 2023                                                                                                                                        | 27,800                |
| Thereafter                                                                                                                                  | 1,864,786             |
| Long-Term Debt Interest Rate Range 0.00% To 0.99% [Member]                                                                                  |                  |
| **Debt Instrument [Line Items]**                                                                                                            |                  |
| 2019                                                                                                                                        | 464                   |
| 2020                                                                                                                                        | 462                   |
| 2021                                                                                                                                        | 463                   |
| 2022                                                                                                                                        | 466                   |
| 2023                                                                                                                                        | 460                   |
| Thereafter                                                                                                                                  | 1,417                 |
| Long-Term Debt Interest Rate Range 1.00% To 1.99% [Member]                                                                                  |                  |
| **Debt Instrument [Line Items]**                                                                                                            |                  |
| 2019                                                                                                                                        | 1,222                 |
| 2020                                                                                                                                        | 1,158                 |
| 2021                                                                                                                                        | 910                   |
| 2022                                                                                                                                        | 888                   |
| 2023                                                                                                                                        | 767                   |
| Thereafter                                                                                                                                  | 6,643                 |
| Long-Term Debt Interest Rate Range 2.00% To 2.99% [Member]                                                                                  |                  |
| **Debt Instrument [Line Items]**                                                                                                            |                  |
| 2019                                                                                                                                        | 51,814                |
| 2020                                                                                                                                        | 1,863                 |
| 2021                                                                                                                                        | 1,913                 |
| 2022                                                                                                                                        | 1,965                 |
| 2023                                                                                                                                        | 2,017                 |
| Thereafter                                                                                                                                  | 7,916                 |
| Long-Term Debt Interest Rate Range 3.00% To 3.99% [Member]                                                                                  |                  |
| **Debt Instrument [Line Items]**                                                                                                            |                  |
| 2019                                                                                                                                        | 2,758                 |
| 2020                                                                                                                                        | 52,553                |
| 2021                                                                                                                                        | 2,591                 |
| 2022                                                                                                                                        | 2,538                 |
| 2023                                                                                                                                        | 1,910                 |
| Thereafter                                                                                                                                  | 730,076               |
| Long-Term Debt Interest Rate Range 4.00% To 4.99% [Member]                                                                                  |                  |
| **Debt Instrument [Line Items]**                                                                                                            |                  |
| 2019                                                                                                                                        | 50,403                |
| 2020                                                                                                                                        | 16,616                |
| 2021                                                                                                                                        | 15,297                |
| 2022                                                                                                                                        | 237                   |
| 2023                                                                                                                                        | 11,055                |
| Thereafter                                                                                                                                  | 849,458               |
| Long-Term Debt Interest Rate Range 5.00% To 5.99% [Member]                                                                                  |                  |
| **Debt Instrument [Line Items]**                                                                                                            |                  |
| 2019                                                                                                                                        | 36,183                |
| 2020                                                                                                                                        | 18,178                |
| 2021                                                                                                                                        | 8,456                 |
| 2022                                                                                                                                        | 18,029                |
| 2023                                                                                                                                        | 10,807                |
| Thereafter                                                                                                                                  | 195,562               |
| Long-Term Debt Interest Rate Range 6.00% To 6.99% [Member]                                                                                  |                  |
| **Debt Instrument [Line Items]**                                                                                                            |                  |
| Thereafter                                                                                                                                  | 31,000                |
| Long-Term Debt Interest Rate Range 7.00% To 7.99% [Member]                                                                                  |                  |
| **Debt Instrument [Line Items]**                                                                                                            |                  |
| 2019                                                                                                                                        | 527                   |
| 2020                                                                                                                                        | 615                   |
| 2021                                                                                                                                        | 666                   |
| 2022                                                                                                                                        | 366                   |
| Thereafter                                                                                                                                  | 29,390                |
| Long-Term Debt Interest Rate Range 8.00% To 8.99% [Member]                                                                                  |                  |
| **Debt Instrument [Line Items]**                                                                                                            |                  |
| 2019                                                                                                                                        | 474                   |
| 2020                                                                                                                                        | 613                   |
| 2021                                                                                                                                        | 1,665                 |
| 2022                                                                                                                                        | 721                   |
| 2023                                                                                                                                        | 784                   |
| Thereafter                                                                                                                                  | 1,324                 |
| Long-Term Debt Interest Rate Range 9.00% To 9.99% [Member]                                                                                  |                  |
| **Debt Instrument [Line Items]**                                                                                                            |                  |
| 2019                                                                                                                                        | 700                   |
| 2020                                                                                                                                        | 700                   |
| 2021                                                                                                                                        | 6,600                 |
| Thereafter                                                                                                                                  | $ 12,000              |
| Minimum [Member] | Long-Term Debt Interest Rate Range 0.00% To 0.99% [Member]                                                               |                  |
| **Debt Instrument [Line Items]**                                                                                                            |                  |
| Interest Rate Range                                                                                                                         | 0.00%                 |
| Minimum [Member] | Long-Term Debt Interest Rate Range 1.00% To 1.99% [Member]                                                               |                  |
| **Debt Instrument [Line Items]**                                                                                                            |                  |
| Interest Rate Range                                                                                                                         | 1.00%                 |
| Minimum [Member] | Long-Term Debt Interest Rate Range 2.00% To 2.99% [Member]                                                               |                  |
| **Debt Instrument [Line Items]**                                                                                                            |                  |
| Interest Rate Range                                                                                                                         | 2.00%                 |
| Minimum [Member] | Long-Term Debt Interest Rate Range 3.00% To 3.99% [Member]                                                               |                  |
| **Debt Instrument [Line Items]**                                                                                                            |                  |
| Interest Rate Range                                                                                                                         | 3.00%                 |
| Minimum [Member] | Long-Term Debt Interest Rate Range 4.00% To 4.99% [Member]                                                               |                  |
| **Debt Instrument [Line Items]**                                                                                                            |                  |
| Interest Rate Range                                                                                                                         | 4.00%                 |
| Minimum [Member] | Long-Term Debt Interest Rate Range 5.00% To 5.99% [Member]                                                               |                  |
| **Debt Instrument [Line Items]**                                                                                                            |                  |
| Interest Rate Range                                                                                                                         | 5.00%                 |
| Minimum [Member] | Long-Term Debt Interest Rate Range 6.00% To 6.99% [Member]                                                               |                  |
| **Debt Instrument [Line Items]**                                                                                                            |                  |
| Interest Rate Range                                                                                                                         | 6.00%                 |
| Minimum [Member] | Long-Term Debt Interest Rate Range 7.00% To 7.99% [Member]                                                               |                  |
| **Debt Instrument [Line Items]**                                                                                                            |                  |
| Interest Rate Range                                                                                                                         | 7.00%                 |
| Minimum [Member] | Long-Term Debt Interest Rate Range 8.00% To 8.99% [Member]                                                               |                  |
| **Debt Instrument [Line Items]**                                                                                                            |                  |
| Interest Rate Range                                                                                                                         | 8.00%                 |
| Minimum [Member] | Long-Term Debt Interest Rate Range 9.00% To 9.99% [Member]                                                               |                  |
| **Debt Instrument [Line Items]**                                                                                                            |                  |
| Interest Rate Range                                                                                                                         | 9.00%                 |
| Maximum [Member] | Long-Term Debt Interest Rate Range 0.00% To 0.99% [Member]                                                               |                  |
| **Debt Instrument [Line Items]**                                                                                                            |                  |
| Interest Rate Range                                                                                                                         | 0.99%                 |
| Maximum [Member] | Long-Term Debt Interest Rate Range 1.00% To 1.99% [Member]                                                               |                  |
| **Debt Instrument [Line Items]**                                                                                                            |                  |
| Interest Rate Range                                                                                                                         | 1.99%                 |
| Maximum [Member] | Long-Term Debt Interest Rate Range 2.00% To 2.99% [Member]                                                               |                  |
| **Debt Instrument [Line Items]**                                                                                                            |                  |
| Interest Rate Range                                                                                                                         | 2.99%                 |
| Maximum [Member] | Long-Term Debt Interest Rate Range 3.00% To 3.99% [Member]                                                               |                  |
| **Debt Instrument [Line Items]**                                                                                                            |                  |
| Interest Rate Range                                                                                                                         | 3.99%                 |
| Maximum [Member] | Long-Term Debt Interest Rate Range 4.00% To 4.99% [Member]                                                               |                  |
| **Debt Instrument [Line Items]**                                                                                                            |                  |
| Interest Rate Range                                                                                                                         | 4.99%                 |
| Maximum [Member] | Long-Term Debt Interest Rate Range 5.00% To 5.99% [Member]                                                               |                  |
| **Debt Instrument [Line Items]**                                                                                                            |                  |
| Interest Rate Range                                                                                                                         | 5.99%                 |
| Maximum [Member] | Long-Term Debt Interest Rate Range 6.00% To 6.99% [Member]                                                               |                  |
| **Debt Instrument [Line Items]**                                                                                                            |                  |
| Interest Rate Range                                                                                                                         | 6.99%                 |
| Maximum [Member] | Long-Term Debt Interest Rate Range 7.00% To 7.99% [Member]                                                               |                  |
| **Debt Instrument [Line Items]**                                                                                                            |                  |
| Interest Rate Range                                                                                                                         | 7.99%                 |
| Maximum [Member] | Long-Term Debt Interest Rate Range 8.00% To 8.99% [Member]                                                               |                  |
| **Debt Instrument [Line Items]**                                                                                                            |                  |
| Interest Rate Range                                                                                                                         | 8.99%                 |
| Maximum [Member] | Long-Term Debt Interest Rate Range 9.00% To 9.99% [Member]                                                               |                  |
| **Debt Instrument [Line Items]**                                                                                                            |                  |
| Interest Rate Range                                                                                                                         | 9.99%                 |

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Contractual interest rate for funds borrowed, under the debt agreement.
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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.
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