Accumulated Other Comprehensive Earnings (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	$ 783,171
Balance at the end of the period	791,691	$ 769,759
Foreign Currency Translation
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	(23,795)	(24,882)
Other comprehensive earnings (loss) before reclassifications	1,296	569
Other comprehensive earnings (loss) net of tax	1,296	569
Balance at the end of the period	(22,499)	(24,313)
Investments
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	(8,809)	(1,286)
Other comprehensive earnings (loss) before reclassifications	1,890	(4,432)
Reclassifications from accumulated other comprehensive loss		(4)
Other comprehensive earnings (loss) net of tax	1,890	(4,436)
Balance at the end of the period	(6,919)	(5,722)
Foreign Currency Derivatives
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	(215)	322
Other comprehensive earnings (loss) before reclassifications	(29)	57
Reclassifications from accumulated other comprehensive loss	66	(77)
Other comprehensive earnings (loss) net of tax	37	(20)
Balance at the end of the period	(178)	302
Commodity Derivatives
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	8	94
Other comprehensive earnings (loss) before reclassifications	101	111
Reclassifications from accumulated other comprehensive loss	(70)	(21)
Other comprehensive earnings (loss) net of tax	31	90
Balance at the end of the period	39	184
Postretirement and Pension Benefits
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	2,642	739
Reclassifications from accumulated other comprehensive loss	(144)	(157)
Other comprehensive earnings (loss) net of tax	(144)	(157)
Balance at the end of the period	2,498	582
Accumulated Other Comprehensive Earnings (Loss).
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	(30,169)	(25,013)
Other comprehensive earnings (loss) before reclassifications	3,258	(3,695)
Reclassifications from accumulated other comprehensive loss	(148)	(259)
Other comprehensive earnings (loss) net of tax	3,110	(3,954)
Balance at the end of the period	$ (27,059)	$ (28,967)