Accumulated Other Comprehensive Earnings (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period			$ 940,972
Balance at the end of the period	$ 952,268	$ 893,127	952,268	$ 893,127
Foreign Currency Translation
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	(22,520)	(24,751)	(22,432)	(24,787)
Other comprehensive earnings (loss) before reclassifications	1,213	1,346	1,125	1,382
Other comprehensive earnings (loss) net of tax	1,213	1,346	1,125	1,382
Balance at the end of the period	(21,307)	(23,405)	(21,307)	(23,405)
Investments
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	(1,751)	3,295	1,512	1,184
Other comprehensive earnings (loss) before reclassifications	(721)	1,287	(3,972)	3,414
Reclassifications from accumulated other comprehensive loss	(29)	(30)	(41)	(46)
Other comprehensive earnings (loss) net of tax	(750)	1,257	(4,013)	3,368
Balance at the end of the period	(2,501)	4,552	(2,501)	4,552
Foreign Currency Derivatives
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	(109)	(472)	70	(621)
Other comprehensive earnings (loss) before reclassifications	(116)	658	(284)	627
Reclassifications from accumulated other comprehensive loss	49	(6)	38	174
Other comprehensive earnings (loss) net of tax	(67)	652	(246)	801
Balance at the end of the period	(176)	180	(176)	180
Commodity Derivatives
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	(290)	(169)	(1,325)	(1,642)
Other comprehensive earnings (loss) before reclassifications	(369)	(937)	(137)	(139)
Reclassifications from accumulated other comprehensive loss	424	629	1,227	1,304
Other comprehensive earnings (loss) net of tax	55	(308)	1,090	1,165
Balance at the end of the period	(235)	(477)	(235)	(477)
Postretirement and Pension Benefits
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	1,538	2,293	1,674	2,448
Reclassifications from accumulated other comprehensive loss	(137)	(157)	(273)	(312)
Other comprehensive earnings (loss) net of tax	(137)	(157)	(273)	(312)
Balance at the end of the period	1,401	2,136	1,401	2,136
Accumulated Other Comprehensive Earnings (Loss)
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	(23,132)	(19,804)	(20,501)	(23,418)
Other comprehensive earnings (loss) before reclassifications	7	2,354	(3,268)	5,284
Reclassifications from accumulated other comprehensive loss	307	436	951	1,120
Other comprehensive earnings (loss) net of tax	314	2,790	(2,317)	6,404
Balance at the end of the period	$ (22,818)	$ (17,014)	$ (22,818)	$ (17,014)