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Fair Value Measurements (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2023
--- | --- | --- | ---
Fair Value Measurements |  |  |
Cash and cash equivalents | $ 64,886 | $ 75,915 | $ 37,992
Fair value measured on a recurring basis |  |  |
Fair Value Measurements |  |  |
Cash and cash equivalents | 64,886 | 75,915 | 37,992
Available for sale securities | 277,471 | 263,313 | 262,729
Trading securities | 95,957 | 87,800 | 76,039
Total assets measured at fair value | 437,726 | 424,804 | 376,578
Fair value measured on a recurring basis | Foreign currency derivatives. |  |  |
Fair Value Measurements |  |  |
Derivative instruments, net | (29) | 302 | (233)
Fair value measured on a recurring basis | Commodity derivatives |  |  |
Fair Value Measurements |  |  |
Derivative instruments, net | (559) | (2,526) | 51
Fair value measured on a recurring basis | Level 1 |  |  |
Fair Value Measurements |  |  |
Cash and cash equivalents | 64,886 | 75,915 | 37,992
Available for sale securities | 4,038 | 4,084 | 4,583
Trading securities | 78,362 | 70,681 | 59,952
Total assets measured at fair value | 146,727 | 148,154 | 102,578
Fair value measured on a recurring basis | Level 1 | Commodity derivatives |  |  |
Fair Value Measurements |  |  |
Derivative instruments, net | (559) | (2,526) | 51
Fair value measured on a recurring basis | Level 2 |  |  |
Fair Value Measurements |  |  |
Available for sale securities | 273,433 | 259,229 | 258,146
Trading securities | 17,595 | 17,119 | 16,087
Total assets measured at fair value | 290,999 | 276,650 | 274,000
Fair value measured on a recurring basis | Level 2 | Foreign currency derivatives. |  |  |
Fair Value Measurements |  |  |
Derivative instruments, net | $ (29) | $ 302 | $ (233)

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