Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 125,007	$ 70,645
Accounts receivable	154,751	130,538
Inventories	190,390	214,871
Prepaid and other current assets	21,839	23,299
Total current assets	491,987	439,353
Deferred income taxes	1,666	5,616
Property, plant, and equipment	916,965	898,251
Less allowances for depreciation, depletion, and amortization	(684,689)	(647,233)
Property, plant, and equipment — net	232,276	251,018
Operating Lease, Right-of-Use Asset	23,413	0
Intangible assets	6,380	6,461
Other assets	17,937	7,236
Goodwill	79,011	90,657
Total Assets	852,670	800,341
Current liabilities
Short-term debt	868	823
Accounts payable	43,206	49,622
Salaries and wages	41,167	47,501
Other liabilities and accrued items	32,477	33,301
Income taxes	1,342	2,615
Unearned revenue	3,380	5,918
Total current liabilities	122,440	139,780
Other long-term liabilities	11,560	14,764
Operating lease liabilities	18,091	0
Finance lease liabilities	17,424	15,221
Retirement and post-employment benefits	32,466	38,853
Unearned income	32,891	32,563
Long-term income taxes	3,451	2,993
Deferred income taxes	2,410	195
Long-term debt	1,260	2,066
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 2019 and 2018)	249,674	234,704
Retained earnings	589,888	548,374
Common stock in treasury (6,744 shares for 2019 and 6,906 shares for 2018)	(186,845)	(175,426)
Accumulated other comprehensive loss	(45,462)	(58,234)
Other equity	3,422	4,488
Total shareholders’ equity	610,677	553,906
Total Liabilities and Shareholders’ Equity	$ 852,670	$ 800,341