Accumulated Other Comprehensive Earnings (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 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	$ 841,414	$ 785,376	841,414	$ 785,376
Foreign Currency Translation
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	(20,730)	(22,499)	(21,050)	(23,795)
Other comprehensive earnings (loss) before reclassifications	(2,009)	1,142	(1,689)	2,438
Other comprehensive earnings (loss) net of tax	(2,009)	1,142	1,689	(2,438)
Balance at the end of the period	(22,739)	(21,357)	(22,739)	(21,357)
Investments
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	(2,240)	(6,919)	(2,359)	(8,809)
Other comprehensive earnings (loss) before reclassifications	627	(247)	746	1,643
Reclassifications from accumulated other comprehensive loss	(2)		(2)
Other comprehensive earnings (loss) net of tax	625	(247)	(744)	(1,643)
Balance at the end of the period	(1,615)	(7,166)	(1,615)	(7,166)
Foreign Currency Derivatives
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	(23)	(178)	228	(215)
Other comprehensive earnings (loss) before reclassifications	(86)	221	(357)	192
Reclassifications from accumulated other comprehensive loss	75	36	95	102
Other comprehensive earnings (loss) net of tax	(11)	257	262	(294)
Balance at the end of the period	(34)	79	(34)	79
Commodity Derivatives
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	(425)	39	(1,915)	8
Other comprehensive earnings (loss) before reclassifications	(1,214)	(648)	(35)	(547)
Reclassifications from accumulated other comprehensive loss	512		823	(70)
Other comprehensive earnings (loss) net of tax	(702)	(648)	(788)	617
Balance at the end of the period	(1,127)	(609)	(1,127)	(609)
Postretirement and Pension Benefits
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	1,762	2,498	1,883	2,642
Reclassifications from accumulated other comprehensive loss	(121)	(143)	(242)	(287)
Other comprehensive earnings (loss) net of tax	(121)	(143)	242	287
Balance at the end of the period	1,641	2,355	1,641	2,355
Accumulated Other Comprehensive Earnings (Loss)
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	(21,656)	(27,059)	(23,213)	(30,169)
Other comprehensive earnings (loss) before reclassifications	(2,682)	468	(1,335)	3,726
Reclassifications from accumulated other comprehensive loss	464	(107)	674	(255)
Other comprehensive earnings (loss) net of tax	(2,218)	361	661	(3,471)
Balance at the end of the period	$ (23,874)	$ (26,698)	$ (23,874)	$ (26,698)