Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents (Note A)	$ 14,462	$ 25,878
Accounts receivable (Note A)	223,553	166,447
Inventories, net (Notes A and J)	361,115	250,778
Prepaid and other current assets	28,122	20,896
Total current assets	627,252	463,999
Deferred income taxes (Notes A and H)	5,431	3,134
Property, plant, and equipment (Notes A and K)	1,132,223	998,312
Less allowances for depreciation, depletion, and amortization	(723,248)	(688,626)
Property, plant, and equipment — net	408,975	309,686
Operating lease, right-of-use assets	63,096	62,089
Intangible assets (Notes A and N)	156,736	54,672
Other assets (Note P)	27,369	19,364
Goodwill (Notes A and N)	318,620	144,916
Total Assets	1,607,479	1,057,860
Current liabilities
Short-term debt (Note O)	15,359	1,937
Accounts payable	86,243	55,640
Salaries and wages	37,544	18,809
Other liabilities and accrued items	53,388	40,887
Income taxes (Notes A and H)	4,205	1,898
Unearned revenue (Note D)	7,770	7,713
Total current liabilities	204,509	126,884
Other long-term liabilities	14,954	14,313
Operating lease liabilities	57,099	56,761
Finance lease liabilities	16,327	20,539
Retirement and post-employment benefits (Note P)	33,394	41,877
Unearned income (Notes A and L)	97,962	86,761
Long-term income taxes (Notes A and H)	1,190	2,689
Deferred income taxes (Notes A and H)	27,216	15,864
Long-term debt (Note O)	434,388	36,542
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 2021 and 2020)	271,978	258,642
Retained earnings	693,756	631,058
Common stock in treasury (6,700 shares for 2021 and 6,820 shares for 2020)	(209,920)	(199,187)
Accumulated other comprehensive loss (Note Q)	(40,169)	(38,639)
Other equity	4,795	3,756
Total shareholders’ equity	720,440	655,630
Total Liabilities and Shareholders’ Equity	$ 1,607,479	$ 1,057,860