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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2025
Fair Value Measurements |
Schedule of financial assets and financial liabilities measured at fair value on a recurring basis | The following tables present, by level within the fair value hierarchy, the Partnership’s financial assets and liabilities that were measured at fair value on a recurring basis as of December 31, 2025 and 2024 (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Fair Value at December 31, 2025 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Cash Collateral | ​ | ​ | ​ |
​ | ​ ​ ​ | Level 1 | ​ ​ ​ | Level 2 | ​ ​ ​ | Netting | ​ ​ ​ | Total |
Assets: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Forward derivative contracts (1) | ​ | $ | — | ​ | $ | 17,067 | ​ | $ | — | ​ | $ | 17,067 | ​
Exchange-traded/cleared derivative instruments (2) | ​ |  | 3,226 | ​ |  | — | ​ |  | 14,578 | ​ |  | 17,804 | ​
Total assets | ​ | $ | 3,226 | ​ | $ | 17,067 | ​ | $ | 14,578 | ​ | $ | 34,871 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Liabilities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Forward derivative contracts (1) | ​ | $ | — | ​ | $ | (4,540) | ​ | $ | — | ​ | $ | (4,540) | ​
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Fair Value at December 31, 2024 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Cash Collateral | ​ | ​ | ​ |
​ | ​ ​ ​ | Level 1 | ​ ​ ​ | Level 2 | ​ ​ ​ | Netting | ​ ​ ​ | Total |
Assets: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Forward derivative contracts (1) | ​ | $ | — | ​ | $ | 13,710 | ​ | $ | — | ​ | $ | 13,710 | ​
Exchange-traded/cleared derivative instruments (2) | ​ |  | (1,808) | ​ |  | — | ​ |  | 21,943 | ​ |  | 20,135 | ​
Pension plans | ​ |  | 3,936 | ​ |  | — | ​ |  | — | ​ |  | 3,936 | ​
Total assets | ​ | $ | 2,128 | ​ | $ | 13,710 | ​ | $ | 21,943 | ​ | $ | 37,781 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Liabilities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Forward derivative contracts (1) | ​ | $ | — | ​ | $ | (6,105) | ​ | $ | — | ​ | $ | (6,105) | ​
(1) | Forward derivative contracts include the Partnership’s petroleum and ethanol physical and financial forwards and OTC swaps.
(2) | Amount includes the effect of cash balances on deposit with clearing brokers.
​
Schedule of carrying value and fair value of the Partnership's senior notes | The fair values of the senior notes, estimated by observing market trading prices of the respective senior notes, were as follows at December 31 (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | 2025 | ​ | 2024 | ​
​ | Face | ​ | Fair | ​ | Face | ​ | Fair | ​
​ | Value | ​ | Value | ​ | Value | ​ | Value | ​
7.00% senior notes due 2027 | $ | — | ​ | $ | — | ​ | $ | 400,000 | ​ | $ | 400,500 | ​
6.875% senior notes due 2029 | $ | 350,000 | ​ | $ | 353,500 | ​ | $ | 350,000 | ​ | $ | 347,813 | ​
8.250% senior notes due 2032 | $ | 450,000 | ​ | $ | 471,375 | ​ | $ | 450,000 | ​ | $ | 464,063 | ​
7.125% senior notes due 2033 | $ | 450,000 | ​ | $ | 455,625 | ​ | $ | — | ​ | $ | — | ​

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- Definition Tabular disclosure of information pertaining to carrying amount and estimated fair value of short-term and long-term debt instruments or arrangements, including but not limited to, identification of terms, features, and collateral requirements. + References No definition available. + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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