Income Per Share and Partnership Unit - Narrative (Details) - shares |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2017 |
Sep. 30, 2016 |
Sep. 30, 2017 |
Sep. 30, 2016 |
|
| Earnings Per Share [Abstract] | ||||
| Potentially dilutive shares, convertible debt | 0 | 972,054 | 0 | 0 |