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Segment Information - Assets for Reportable Segment (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Segment Reporting, Asset Reconciling Item [Line Items] |  |
Total assets | $ 11,128,704 | $ 11,230,450
Same Store [Member] |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |
Total assets | 9,740,808 | 9,975,880
Non-Same Store and Other |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |
Total assets | 1,198,693 | 1,049,029
Corporate assets |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |
Total assets | $ 189,203 | $ 205,541

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