Summary of Significant Accounting Policies - Revenue Recognition (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
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| Accounting Policies [Abstract] | ||
| Straight-line rent adjustments recorded as a receivable | $ 57.5 | $ 51.9 |
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of the adjustment to rental revenues to measure escalating leasing revenues on a straight line basis. No definition available.
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