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PARTNERS' CAPITAL - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions | 9 Months Ended | 41 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2021 | May 31, 2018
Partners' capital |  |  |
Treasury units retired | $ 0.0 |  |
Limited Partners' Capital |  |  |
Partners' capital |  |  |
Repurchase and retire authorization |  |  | $ 100.0
Treasury units retired |  | $ 93.5 |
Number of units retired |  | 5,460,639 |
Repurchase price (in dollars per unit) |  | $ 17.12 |
Remaining authorized amount | $ 6.5 | $ 6.5 |

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