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Derivative Instruments and Hedging Activities (Tables) | 6 Months Ended
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Jun. 30, 2026
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Summary of commodity derivative activity | Embedded derivatives as of December 31, 2025 consisted of the following (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Gross Amounts | ​ | Net Amount
​ | ​ ​ ​ | Recognized | ​ ​ ​ | Presented
Assets: |  | ​ | ​ |  | ​ | ​
Fueling agreements: | ​ | ​ | ​ | ​ | ​ | ​
Prepaid expenses and other current assets | ​ | $ | 466 | ​ | $ | 466
Notes receivable and other long-term assets, net | ​ | ​ | 491 | ​ | ​ | 491
Total derivative assets | ​ | $ | 957 | ​ | $ | 957
​ Embedded derivatives as of June 30, 2026 consisted of the following (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Gross Amounts | ​ | Net Amount
​ | ​ ​ ​ | Recognized | ​ ​ ​ | Presented
Assets: |  | ​ | ​ |  | ​ | ​
Fueling agreements: | ​ | ​ | ​ | ​ | ​ | ​
Prepaid expenses and other current assets | ​ | $ | 799 | ​ | $ | 799
Notes receivable and other long-term assets, net | ​ | ​ | 527 | ​ | ​ | 527
Total derivative assets | ​ | $ | 1,326 | ​ | $ | 1,326

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- Definition Tabular disclosure of derivative instrument not designated or qualifying as hedging instrument. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4CC -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4CC Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4E -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4E Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4B -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4B + Details
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