Sale of Common Units Under Equity Distribution Agreement (Details) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2016 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Sale of Common Units Under Equity Distribution Agreement | ||||
| Maximum aggregate offering price of common limited partners units under an equity distribution agreement | $ 250,000 | |||
| Common units issued and sold | 2,391,595 | |||
| Net proceeds from issuance of common units | $ 65,395 | $ 240,703 | $ 1,087,224 | |
| Remaining capacity to issue additional common units under an equity distribution agreement | $ 183,800 | |||