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Basis of Presentation and Summary of Significant Accounting Policies - Reclassification of Prior Year Presentation of Rental Income and Property Expense Recovery (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Rental income | $ 103,356 | $ 85,991 | $ 179,841 | $ 166,390
Presentation prior to January 1, 2019 |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Lease income |  | 61,488 |  | 121,573
Property expense recovery |  | 18,199 |  | 35,811
Lease termination income |  | 6,304 |  | 9,006
Rental income |  | $ 85,991 |  | $ 166,390

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