Recent Transactions (Impairments On Properties Held And Used) (Narrative) (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
Jun. 30, 2021 |
Sep. 30, 2021 |
Sep. 30, 2020 |
|
| Real Estate Properties [Line Items] | |||||
| Land and other impairments, net | $ 3,401 | $ 1,292 | $ 11,333 | $ 23,401 | |
| Land Parcels [Member] | |||||
| Real Estate Properties [Line Items] | |||||
| Land and other impairments, net | 6,800 | 14,300 | |||
| Hoboken, New Jersey [Member] | Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Land Parcels [Member] | |||||
| Real Estate Properties [Line Items] | |||||
| Land and other impairments, net | $ 6,800 | $ 14,300 | |||
| Hoboken, New Jersey [Member] | Disposal Group, Not Discontinued Operations [Member] | |||||
| Real Estate Properties [Line Items] | |||||
| Property impairments | $ 6,000 | ||||