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Fair Value Measurements (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023 | Sep. 30, 2023
--- | --- | --- | ---
Fair Value Measurements |  |  |
Cash and cash equivalents | $ 91,711 | $ 75,915 | $ 47,320
Fair value measured on a recurring basis |  |  |
Fair Value Measurements |  |  |
Cash and cash equivalents | 91,711 | 75,915 | 47,320
Available for sale securities | 285,968 | 263,313 | 251,531
Trading securities | 103,876 | 87,800 | 79,754
Total assets measured at fair value | 481,515 | 424,804 | 380,018
Fair value measured on a recurring basis | Foreign currency derivatives |  |  |
Fair Value Measurements |  |  |
Derivative instruments, net | 187 | 302 | (141)
Fair value measured on a recurring basis | Commodity derivatives |  |  |
Fair Value Measurements |  |  |
Derivative instruments, net | (227) | (2,526) | 1,554
Fair value measured on a recurring basis | Level 1 |  |  |
Fair Value Measurements |  |  |
Cash and cash equivalents | 91,711 | 75,915 | 47,320
Available for sale securities | 4,135 | 4,084 | 4,479
Trading securities | 85,877 | 70,681 | 63,350
Total assets measured at fair value | 181,496 | 148,154 | 116,703
Fair value measured on a recurring basis | Level 1 | Commodity derivatives |  |  |
Fair Value Measurements |  |  |
Derivative instruments, net | (227) | (2,526) | 1,554
Fair value measured on a recurring basis | Level 2 |  |  |
Fair Value Measurements |  |  |
Available for sale securities | 281,833 | 259,229 | 247,052
Trading securities | 17,999 | 17,119 | 16,404
Total assets measured at fair value | 300,019 | 276,650 | 263,315
Fair value measured on a recurring basis | Level 2 | Foreign currency derivatives |  |  |
Fair Value Measurements |  |  |
Derivative instruments, net | $ 187 | $ 302 | $ (141)

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