Summary of Significant Accounting Policies - Issuance, dividends (Details) - $ / shares |
1 Months Ended | 3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jan. 30, 2017 |
Jun. 30, 2015 |
May 31, 2015 |
Dec. 31, 2014 |
Nov. 30, 2014 |
Dec. 31, 2016 |
Sep. 30, 2016 |
Jun. 30, 2016 |
Mar. 31, 2016 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Net Income Per Limited Partner Unit | ||||||||||||
| Public offering of common units | 3,000,000 | 3,565,000 | 3,000,000 | 3,565,000 | ||||||||
| General partner ownership interest (as a percent) | 0.67% | 0.74% | 0.74% | 0.83% | 0.67% | |||||||
| Quarterly cash distribution declared (in dollars per unit) | $ 0.4625 | $ 0.4625 | $ 0.4625 | $ 0.4625 | ||||||||
| Subsequent event | ||||||||||||
| Net Income Per Limited Partner Unit | ||||||||||||
| Quarterly cash distribution declared (in dollars per unit) | $ 0.4625 | |||||||||||
| Weighted average | ||||||||||||
| Net Income Per Limited Partner Unit | ||||||||||||
| General partner ownership interest (as a percent) | 0.70% | |||||||||||