Restricted Cash (Schedule Of Restricted Cash) (Details) - USD ($) $ in Thousands |
Jun. 30, 2019 |
Dec. 31, 2018 |
Jun. 30, 2018 |
Dec. 31, 2017 |
|---|---|---|---|---|
| Restricted Cash [Abstract] | ||||
| Security deposits | $ 6,844 | $ 10,257 | ||
| Escrow and other reserve funds | 11,048 | 9,664 | ||
| Total restricted cash | $ 17,892 | $ 19,921 | $ 22,121 | $ 39,792 |