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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Current Assets    
Cash $ 131,711 $ 63,487
Trade receivables, net 50,138 60,082
Gross inventories 71,104 87,592
Less LIFO reserve (45,097) (45,180)
Less excess and obsolescence reserve (1,994) (2,698)
Net inventories 24,013 39,714
Prepaid expenses and other current assets 2,597 3,501
Total Current Assets 208,459 166,784
Property, plant and equipment 360,554 365,013
Less allowances for depreciation (270,576) (261,218)
Net property, plant and equipment 89,978 103,795
Other assets 14,321 13,739
Total Assets 312,758 284,318
Current Liabilities    
Trade accounts payable and accrued expenses 28,900 32,422
Contract liability to customers (Note 3) 6,674
Product liability 813 729
Employee compensation and benefits 19,755 14,315
Workers' compensation 4,997 5,211
Income taxes payable 1,221
Total Current Liabilities 62,360 52,677
Product liability 78 90
Deferred income taxes 889 1,402
Contingent liabilities - Note 12
Stockholders' Equity    
Common Stock 24,123 24,092
Additional paid-in capital 30,150 28,329
Retained earnings 338,753 321,323
Less: Treasury stock - at cost 2018 - 6,665,398 shares 2017 - 6,665,398 shares (143,595) (143,595)
Total Stockholders' Equity 249,431 230,149
Total Liabilities and Stockholders' Equity 312,758 284,318
Nonvoting Common Stock [Member]    
Stockholders' Equity    
Common Stock
Common Stock [Member]    
Stockholders' Equity    
Common Stock $ 24,123 $ 24,092