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FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Fair value measurements |  |
Cash and cash equivalents | $ 105,840 | $ 166,841
Available for sale securities | 241,407 | 188,282
Trading securities | 89,736 | 73,828
Fair value measured on a recurring basis |  |
Fair value measurements |  |
Cash and cash equivalents | 105,840 | 166,841
Available for sale securities | 241,407 | 188,282
Trading securities | 89,736 | 73,828
Total assets measured at fair value | 437,533 | 430,670
Fair value measured on a recurring basis | Foreign currency forward contracts |  |
Fair value measurements |  |
Derivative instruments, net | 426 | 778
Fair value measured on a recurring basis | Commodity futures contracts |  |
Fair value measurements |  |
Derivative instruments, net | 124 | 941
Fair value measured on a recurring basis | Level 1 |  |
Fair value measurements |  |
Cash and cash equivalents | 105,840 | 166,841
Available for sale securities | 1,282 | 3,149
Trading securities | 76,196 | 61,431
Total assets measured at fair value | 183,442 | 232,362
Fair value measured on a recurring basis | Level 1 | Commodity futures contracts |  |
Fair value measurements |  |
Derivative instruments, net | 124 | 941
Fair value measured on a recurring basis | Level 2 |  |
Fair value measurements |  |
Available for sale securities | 240,125 | 185,133
Trading securities | 13,540 | 12,397
Total assets measured at fair value | 254,091 | 198,308
Fair value measured on a recurring basis | Level 2 | Foreign currency forward contracts |  |
Fair value measurements |  |
Derivative instruments, net | $ 426 | $ 778

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