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Fair Value Measurements (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024 | Sep. 30, 2024
--- | --- | --- | ---
Fair Value Measurements |  |  |
Cash and cash equivalents | $ 78,895 | $ 138,841 | $ 91,711
Fair value measured on a recurring basis |  |  |
Fair Value Measurements |  |  |
Cash and cash equivalents | 78,895 | 138,841 | 91,711
Available for sale securities | 357,875 | 283,060 | 285,968
Trading securities | 119,592 | 105,067 | 103,876
Total assets measured at fair value | 555,472 | 523,984 | 481,515
Fair value measured on a recurring basis | Foreign currency derivatives |  |  |
Fair Value Measurements |  |  |
Derivative instruments, net | (61) | (818) | 187
Fair value measured on a recurring basis | Commodity derivatives |  |  |
Fair Value Measurements |  |  |
Derivative instruments, net | (829) | (2,166) | (227)
Fair value measured on a recurring basis | Level 1 |  |  |
Fair Value Measurements |  |  |
Cash and cash equivalents | 78,895 | 138,841 | 91,711
Available for sale securities | 2,940 | 4,102 | 4,135
Trading securities | 102,805 | 86,925 | 85,877
Total assets measured at fair value | 183,811 | 227,702 | 181,496
Fair value measured on a recurring basis | Level 1 | Commodity derivatives |  |  |
Fair Value Measurements |  |  |
Derivative instruments, net | (829) | (2,166) | (227)
Fair value measured on a recurring basis | Level 2 |  |  |
Fair Value Measurements |  |  |
Available for sale securities | 354,935 | 278,958 | 281,833
Trading securities | 16,787 | 18,142 | 17,999
Total assets measured at fair value | 371,661 | 296,282 | 300,019
Fair value measured on a recurring basis | Level 2 | Foreign currency derivatives |  |  |
Fair Value Measurements |  |  |
Derivative instruments, net | $ (61) | $ (818) | $ 187

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