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Leases ASC 842 (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 USD ($) | Sep. 30, 2019 USD ($) propertyUnit
Lessor Disclosure [Abstract] |  |
Rental and other revenues related to operating lease payments | $ 184,200 | $ 534,200
Variable lease income | 17,300 | 49,200
Operating leases, scheduled future minimum payments receivable [Abstract] |  |
October 1 to December 31, 2019 | 156,920 | 156,920
2020 | 619,066 | 619,066
2021 | 577,843 | 577,843
2022 | 544,683 | 544,683
2023 | 483,709 | 483,709
2024 | 422,362 | 422,362
Thereafter | 1,820,576 | 1,820,576
Operating leases, total future minimum payments receivable due | $ 4,625,159 | $ 4,625,159
Lessee Disclosure [Abstract] |  |
Number of properties subject to ground leases | propertyUnit |  | 20
Weighted average remaining term of ground leases (in years) | 52 years | 52 years
Operating lease liability upon initial adoption | $ 35,300 | $ 35,300
Right of use asset upon initial adoption | $ 29,700 | $ 29,700
Operating lease discount rate (in hundredths) | 4.50% | 4.50%
Operating ground lease expense | $ 600 | $ 1,800
Operating ground lease payments | 500 | 1,700
Operating ground lease liabilities, scheduled future minimum payments [Abstract] |  |
October 1 to December 31, 2019 | 517 | 517
2020 | 2,086 | 2,086
2021 | 2,127 | 2,127
2022 | 2,169 | 2,169
2023 | 2,167 | 2,167
2024 | 2,123 | 2,123
Thereafter | 83,697 | 83,697
Operating ground lease liability, total future minimum payments | 94,886 | 94,886
Operating lease liability discount | (59,869) | (59,869)
Operating lease liability | $ 35,017 | $ 35,017
Minimum [Member] |  |
Lessor Disclosure [Abstract] |  |
Operating leases, term of leases | 3 years | 3 years
Maximum [Member] |  |
Lessor Disclosure [Abstract] |  |
Operating leases, term of leases | 10 years | 10 years

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