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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Current Assets    
Cash $ 102,667 $ 63,487
Trade receivables, net 61,129 60,082
Gross inventories 73,762 87,592
Less LIFO reserve (45,312) (45,180)
Less excess and obsolescence reserve (2,338) (2,698)
Net inventories 26,112 39,714
Prepaid expenses and other current assets 2,985 3,501
Total Current Assets 192,893 166,784
Property, plant and equipment 359,490 365,013
Less allowances for depreciation (262,381) (261,218)
Net property, plant and equipment 97,109 103,795
Other assets 13,273 13,739
Total Assets 303,275 284,318
Current Liabilities    
Trade accounts payable and accrued expenses 28,161 32,422
Contract liability to customers -Note 3 9,308
Product liability 667 729
Employee compensation and benefits 15,755 14,315
Workers' compensation 5,498 5,211
Income taxes payable 4,625
Total Current Liabilities 64,014 52,677
Product liability 82 90
Deferred income taxes 658 1,402
Contingent liabilities - Note 12
Stockholders' Equity    
Common Stock 24,110 24,092
Additional paid-in capital 28,737 28,329
Retained earnings 329,269 321,323
Less: Treasury stock - at cost 2018 - 6,665,398 shares 2017 - 6,665,398 shares (143,595) (143,595)
Total Stockholders' Equity 238,521 230,149
Total Liabilities and Stockholders' Equity 303,275 284,318
Nonvoting Common Stock [Member]    
Stockholders' Equity    
Common Stock
Common Stock [Member]    
Stockholders' Equity    
Common Stock $ 24,110 $ 24,092