Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Current assets
Cash and cash equivalents (Note A)	$ 13,681	$ 16,713
Accounts receivable (Note A)	222,916	193,793
Inventories, net (Notes A and J)	461,231	441,299
Prepaid and other current assets	91,692	72,419
Total current assets	789,520	724,224
Deferred income taxes (Notes A and H)	7,727	2,964
Property, plant, and equipment (Notes A and K)	1,376,703	1,315,586
Less allowances for depreciation, depletion, and amortization	(841,245)	(804,781)
Property, plant, and equipment — net	535,458	510,805
Operating lease, right-of-use asset (Note M)	62,036	64,449
Intangible assets (Notes A and M)	105,874	109,312
Other assets (Note P)	21,529	22,140
Goodwill (Notes A and N)	280,657	263,738
Total Assets	1,802,801	1,697,632
Current liabilities
Short-term debt (Note O)	22,445	34,274
Accounts payable	148,642	105,901
Salaries and wages	19,312	20,939
Other liabilities and accrued items	45,445	47,523
Income taxes (Notes A and H)	5,054	4,906
Unearned revenue (Note D)	12,685	13,191
Total current liabilities	253,583	226,734
Other long-term liabilities	12,556	12,013
Operating lease liabilities (Note M)	60,568	62,626
Finance lease liabilities (Note M)	13,384	12,404
Retirement and post-employment benefits (Note P)	23,931	26,411
Unearned income (Notes A and L)	55,862	75,769
Long-term income taxes (Notes A and H)	532	1,818
Deferred income taxes (Notes A and H)	2,760	3,242
Long-term debt (Note O)	436,348	407,734
Shareholders’ equity
Serial preferred stock (no par value; 5,000 authorized shares, none issued)	0	0
Common stock (no par value; 60,000 authorized shares, issued shares of 27,148 for both 2025 and 2024)	351,901	336,136
Retained earnings	912,361	849,111
Common stock in treasury (6,413 shares for 2025 and 6,384 shares for 2024)	(277,473)	(261,880)
Accumulated other comprehensive loss (Note Q)	(50,581)	(61,046)
Other equity	7,069	6,560
Total shareholders’ equity	943,277	868,881
Total Liabilities and Shareholders’ Equity	$ 1,802,801	$ 1,697,632