Earnings Per Share of Common Stock - Additional Information (Detail) - shares |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2017 |
Sep. 30, 2016 |
Sep. 30, 2017 |
Sep. 30, 2016 |
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| Earnings Per Share [Abstract] | ||||
| Weighted average number of operating partnership units held by noncontrolling limited partners (in shares) | 1,444,435 | 854,116 | 1,447,633 | 613,446 |
| X | ||||||||||
- Definition Weighted Average Number of Operating Partnership Units Held By Noncontrolling Interest No definition available.
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| X | ||||||||||
- References No definition available.
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