Tenant Leases (Future Minimum Rentals To Be Received Under Non-Cancelable Operating Leases) (Details) $ in Thousands |
3 Months Ended |
|---|---|
|
Mar. 31, 2018
USD ($)
| |
| Property Subject to or Available for Operating Lease [Line Items] | |
| April 1 through December 31, 2018 | $ 251,977 |
| 2019 | 308,765 |
| 2020 | 280,323 |
| 2021 | 253,898 |
| 2022 | 225,883 |
| 2023 and thereafter | 921,037 |
| Total | $ 2,241,883 |
| Tenant Leases [Member] | |
| Property Subject to or Available for Operating Lease [Line Items] | |
| Operating leases with various expiration dates through year | Dec. 31, 2035 |
| Multi-Family Properties [Member] | |
| Property Subject to or Available for Operating Lease [Line Items] | |
| Lease period | 1 year |