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Partners' Capital, Mezzanine Equity and Distributions (Preferred Distributions Paid in Kind) (Details) - USD ($) $ in Thousands | May 15, 2019 | Feb. 14, 2019 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | --- | ---
Distribution Made to Limited Partner [Line Items] |  |  |  |
Redeemable Noncontrolling Interest, Equity, Preferred Units, Units issued |  |  | 10,145 | 9,499
Class A Convertible Preferred Units |  |  |  |
Distribution Made to Limited Partner [Line Items] |  |  |  |
Date Issued | May 15, 2019 | Feb. 14, 2019 |  |
Number of Units (in units) | 364,180 | 534,576 |  |
Total Amount | $ 12,277 | $ 18,021 |  |

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