Investments In Unconsolidated Joint Ventures (Summary Of Financial Position Of Unconsolidated Joint Ventures) (Details) - USD ($) $ in Thousands |
Dec. 31, 2017 |
Dec. 31, 2016 |
|---|---|---|
| Investments In Unconsolidated Joint Ventures [Abstract] | ||
| Rental property, net | $ 931,419 | $ 1,746,233 |
| Other assets | 207,903 | 278,289 |
| Total assets | 1,139,322 | 2,024,522 |
| Mortgages and loans payable | 689,412 | 1,350,973 |
| Other liabilities | 80,746 | 247,212 |
| Partners'/members' capital | 369,164 | 426,337 |
| Total liabilities and partners'/members' capital | $ 1,139,322 | $ 2,024,522 |