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)

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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