Unitholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands |
1 Months Ended | 12 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Jun. 16, 2015 |
Jun. 11, 2015 |
May 19, 2015 |
Dec. 10, 2014 |
Dec. 05, 2014 |
Jun. 30, 2015 |
Dec. 31, 2014 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Number of common units sold | 3,000,000 | 3,565,000 | 3,000,000 | 3,565,000 | ||||||
| Net proceeds from public offering after deducting underwriting fees and offering expenses | $ 109,300 | $ 137,800 | $ 109,305 | $ 137,844 | ||||||
| At The Market Offering Program | ||||||||||
| Number of common units sold | 0 | 0 | ||||||||
| Common units | ||||||||||
| Number of common units sold | 3,000,000 | 3,565,000 | 3,000,000 | 3,565,000 | ||||||
| Common units issued in public offering, offer price (in dollars per share) | $ 38.12 | $ 40.24 | ||||||||
| Common units | At The Market Offering Program | ||||||||||
| Aggregate offering price | $ 50,000 | |||||||||