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Commitments and Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2017
Commitments And Contingencies Disclosure [Abstract] |
Schedule Of Future Minimum Rental Revenues And Minimum Rental Payments | The scheduled future minimum rental revenues from rental properties under the terms of all non-cancelable tenant leases, assuming no new or renegotiated leases or option extensions for such premises and the scheduled minimum rental payments under the terms of all non-cancelable operating leases, principally ground leases, in which the Company is the lessee as of December 31, 2017, are as follows (in thousands):
Year |  | Minimum Rental Revenues |  |  | Minimum Rental Payments |
2018 |  | $ | 569,936 |  |  | $ | 3,887 |
2019 |  |  | 503,242 |  |  |  | 3,478 |
2020 |  |  | 434,410 |  |  |  | 3,112 |
2021 |  |  | 360,858 |  |  |  | 3,121 |
2022 |  |  | 279,232 |  |  |  | 2,978 |
Thereafter |  |  | 792,050 |  |  |  | 117,703 |
|  | $ | 2,939,728 |  |  | $ | 134,279 |

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