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Partners' Capital, Mezzanine Capital and Distributions (Narrative) (Details) $ / shares in Units, $ in Thousands |  |  | 3 Months Ended | 6 Months Ended | 12 Months Ended | 31 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Apr. 03, 2023 USD ($) $ / shares shares | Sep. 23, 2019 | Jun. 30, 2024 USD ($) shares | Jun. 30, 2023 USD ($) | Jun. 30, 2024 USD ($) shares | Jun. 30, 2023 USD ($) | Dec. 31, 2023 USD ($) $ / shares shares | Jun. 30, 2024 shares | Aug. 08, 2023 shares
Partners Capital And Distributions [Line Items] |  |  |  |  |  |  |  |  |
Common units outstanding (in units) |  |  | 122,464,318 |  | 122,464,318 |  | 122,464,318 | 122,464,318 |
Less: Accumulated distributions and returns attributable to Class A Convertible Preferred Units | $ |  |  | $ (21,894) | $ (22,910) | $ (43,788) | $ (46,912) |  |  |
Proceeds from Noncontrolling Interests | $ |  |  |  |  | $ 16,200 | 34,920 |  |  |
Cameron Highway Oil Pipeline | Affiliated Entity |  |  |  |  |  |  |  |  |
Partners Capital And Distributions [Line Items] |  |  |  |  |  |  |  |  |
Percentage of ownership after transaction |  |  |  |  |  |  |  | 64.00% |
Independence Hub, LLC | Affiliated Entity | Genesis Energy, LLC |  |  |  |  |  |  |  |  |
Partners Capital And Distributions [Line Items] |  |  |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent |  |  | 80.00% |  | 80.00% |  |  | 80.00% |
Subsidiary | Alkali Holdings |  |  |  |  |  |  |  |  |
Partners Capital And Distributions [Line Items] |  |  |  |  |  |  |  |  |
Period for occurrence of triggering events |  | 6 years 6 months |  |  |  |  |  |  |
Class A Common Units | 2023 Repurchase Program |  |  |  |  |  |  |  |  |
Partners Capital And Distributions [Line Items] |  |  |  |  |  |  |  |  |
Percentage of shares authorized for repurchase |  |  |  |  |  |  |  |  | 0.10
Shares authorized to be repurchased (in shares) |  |  |  |  |  |  |  |  | 12,253,922
Stock repurchased and cancelled (in shares) |  |  |  |  |  |  | 114,900 |  |
Shares purchased (in shares) | $ / shares |  |  |  |  |  |  | $ 9.09 |  |
Purchase price | $ |  |  |  |  |  |  | $ 1,000 |  |
Class A Convertible Preferred Stock Units |  |  |  |  |  |  |  |  |
Partners Capital And Distributions [Line Items] |  |  |  |  |  |  |  |  |
Less: Accumulated distributions and returns attributable to Class A Convertible Preferred Units | $ |  |  | $ (21,900) | $ (24,000) | $ (43,800) | $ (48,000) |  |  |
Class A Convertible Preferred Units redeemed (in shares) | 741,620 |  |  |  |  |  |  |  |
Class A Convertible Preferred units redeemed (in dollars per share) | $ / shares | $ 33.71 |  |  |  |  |  |  |  |
Class A Convertible Preferred Units, carrying value (dollars per share) | $ / shares | $ 35.2 |  |  |  |  |  |  |  |
Class A Convertible Preferred Units redeemed, value (dollars) | $ | $ 1,100 |  |  |  |  |  |  |  |
Temporary equity, adjustment | $ | $ 1,100 |  |  |  |  |  |  |  |
Limited Partner [Member] | Class A Common Units |  |  |  |  |  |  |  |  |
Partners Capital And Distributions [Line Items] |  |  |  |  |  |  |  |  |
Common units outstanding (in units) |  |  | 122,424,321 |  | 122,424,321 |  |  | 122,424,321 |
Limited Partner [Member] | Class B Common Units |  |  |  |  |  |  |  |  |
Partners Capital And Distributions [Line Items] |  |  |  |  |  |  |  |  |
Common units outstanding (in units) |  |  | 39,997 |  | 39,997 |  |  | 39,997 |
Limited Partner [Member] | Preferred Class A |  |  |  |  |  |  |  |  |
Partners Capital And Distributions [Line Items] |  |  |  |  |  |  |  |  |
Common units outstanding (in units) |  |  | 23,111,918 |  | 23,111,918 |  |  | 23,111,918 |

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