Accumulated Other Comprehensive Earnings (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period			$ 823,422
Balance at the end of the period	$ 870,161	$ 803,874	870,161	$ 803,874
Foreign Currency Translation
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	(22,739)	(21,357)	(21,050)	(23,795)
Other comprehensive earnings (loss) before reclassifications	(1,370)	(543)	(3,059)	1,895
Other comprehensive earnings (loss) net of tax	(1,370)	(543)	3,059	(1,895)
Balance at the end of the period	(24,109)	(21,900)	(24,109)	(21,900)
Investments
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	(1,615)	(7,166)	(2,359)	(8,809)
Other comprehensive earnings (loss) before reclassifications	4,904	567	5,650	2,210
Reclassifications from accumulated other comprehensive loss	(4)		(6)
Other comprehensive earnings (loss) net of tax	4,900	567	(5,644)	(2,210)
Balance at the end of the period	3,285	(6,599)	3,285	(6,599)
Foreign Currency Derivatives
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	(34)	79	228	(215)
Other comprehensive earnings (loss) before reclassifications	156	(209)	(201)	(17)
Reclassifications from accumulated other comprehensive loss	19	22	114	124
Other comprehensive earnings (loss) net of tax	175	(187)	87	(107)
Balance at the end of the period	141	(108)	141	(108)
Commodity Derivatives
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	(1,127)	(609)	(1,915)	8
Other comprehensive earnings (loss) before reclassifications	609	1,783	574	1,236
Reclassifications from accumulated other comprehensive loss	346	4	1,169	(66)
Other comprehensive earnings (loss) net of tax	955	1,787	(1,743)	(1,170)
Balance at the end of the period	(172)	1,178	(172)	1,178
Postretirement and Pension Benefits
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	1,641	2,355	1,883	2,642
Reclassifications from accumulated other comprehensive loss	(122)	(144)	(364)	(431)
Other comprehensive earnings (loss) net of tax	(122)	(144)	364	431
Balance at the end of the period	1,519	2,211	1,519	2,211
Accumulated Other Comprehensive Earnings (Loss)
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	(23,874)	(26,698)	(23,213)	(30,169)
Other comprehensive earnings (loss) before reclassifications	4,299	1,598	2,964	5,324
Reclassifications from accumulated other comprehensive loss	239	(118)	913	(373)
Other comprehensive earnings (loss) net of tax	4,538	1,480	(3,877)	(4,951)
Balance at the end of the period	$ (19,336)	$ (25,218)	$ (19,336)	$ (25,218)