Accumulated Other Comprehensive Earnings (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period			$ 870,743
Balance at the end of the period	$ 893,127	$ 841,414	893,127	$ 841,414
Foreign Currency Translation
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	(24,751)	(20,730)	(24,787)	(21,050)
Other comprehensive earnings (loss) before reclassifications	1,346	(2,009)	1,382	(1,689)
Other comprehensive earnings (loss) net of tax	1,346	(2,009)	1,382	(1,689)
Balance at the end of the period	(23,405)	(22,739)	(23,405)	(22,739)
Investments
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	3,295	(2,240)	1,184	(2,359)
Other comprehensive earnings (loss) before reclassifications	1,287	627	3,414	746
Reclassifications from accumulated other comprehensive loss	(30)	(2)	(46)	(2)
Other comprehensive earnings (loss) net of tax	1,257	625	3,368	744
Balance at the end of the period	4,552	(1,615)	4,552	(1,615)
Foreign Currency Derivatives
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	(472)	(23)	(621)	228
Other comprehensive earnings (loss) before reclassifications	658	(86)	627	(357)
Reclassifications from accumulated other comprehensive loss	(6)	75	174	95
Other comprehensive earnings (loss) net of tax	652	(11)	801	(262)
Balance at the end of the period	180	(34)	180	(34)
Commodity Derivatives
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	(169)	(425)	(1,642)	(1,915)
Other comprehensive earnings (loss) before reclassifications	(937)	(1,214)	(139)	(35)
Reclassifications from accumulated other comprehensive loss	629	512	1,304	823
Other comprehensive earnings (loss) net of tax	(308)	(702)	1,165	788
Balance at the end of the period	(477)	(1,127)	(477)	(1,127)
Postretirement and Pension Benefits
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	2,293	1,762	2,448	1,883
Reclassifications from accumulated other comprehensive loss	(157)	(121)	(312)	(242)
Other comprehensive earnings (loss) net of tax	(157)	(121)	(312)	(242)
Balance at the end of the period	2,136	1,641	2,136	1,641
Accumulated Other Comprehensive Earnings (Loss)
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	(19,804)	(21,656)	(23,418)	(23,213)
Other comprehensive earnings (loss) before reclassifications	2,354	(2,682)	5,284	(1,335)
Reclassifications from accumulated other comprehensive loss	436	464	1,120	674
Other comprehensive earnings (loss) net of tax	2,790	(2,218)	6,404	(661)
Balance at the end of the period	$ (17,014)	$ (23,874)	$ (17,014)	$ (23,874)