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Revenues - Narrative (Details) |  | 6 Months Ended |
--- | --- | --- | ---
Jan. 01, 2018 USD ($) affiliate | Jun. 30, 2018 USD ($) | Dec. 31, 2017 USD ($)
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Dividends in excess of cumulative earnings |  | $ (880,292,000) | $ (836,269,000)
Number of unconsolidated affiliates included in partial sale of real estate assets | affiliate | 1 |  |
Tenant reimbursements period related to certain capital expenditure minimum |  | 5 years |
Tenant reimbursements period related to certain capital expenditure maximum |  | 15 years |
Lease commission recognized upon lease execution (as a percent) |  | 50.00% |
Remaining performance obligation |  | $ 0 |
Accounting Standards Update 2017-05, Unconsolidated Affiliate Impact |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Effect of change on operating results | $ 57,850,000 |  |
Accounting Standards Update 2017-05, Joint Venture Impact |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Effect of change on operating results | 901,000 |  |
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09 |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Dividends in excess of cumulative earnings | $ 196,000 |  |

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