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Consolidated Balance Sheets - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Current Assets    
Cash and cash equivalents $ 38,492 $ 63,487
Short-term investments 114,326
Trade receivables, net 45,031 60,082
Gross inventories 80,288 87,592
Less LIFO reserve (46,341) (45,180)
Less excess and obsolescence reserve (2,527) (2,698)
Net inventories 31,420 39,714
Prepaid expenses and other current assets 2,920 3,501
Total Current Assets 232,189 166,784
Property, Plant, and Equipment 358,756 365,013
Less allowances for depreciation (276,045) (261,218)
Net property, plant and equipment 82,711 103,795
Deferred income taxes 2,969
Other assets 17,663 13,739
Total Assets 335,532 284,318
Current Liabilities    
Trade accounts payable and accrued expenses 33,021 32,422
Contract liabilities with customers (Note 2) 7,477
Product liability 1,073 729
Employee compensation and benefits 20,729 14,315
Workers' compensation 5,551 5,211
Income taxes payable 3,340
Total Current Liabilities 71,191 52,677
Product liability 99 90
Deferred income taxes 1,402
Contingent liabilities (Note 18)
Stockholders' Equity    
Common stock 24,123 24,092
Additional paid-in capital 33,291 28,329
Retained earnings 350,423 321,323
Less: Treasury stock - at cost 2018 - 6,665,398 shares 2017 - 6,665,398 shares (143,595) (143,595)
Total Stockholders' Equity 264,242 230,149
Total Liabilities and Stockholders' Equity 335,532 284,318
Voting Common Stock [Member]    
Stockholders' Equity    
Common stock 24,123 24,092
Nonvoting Common Stock [Member]    
Stockholders' Equity    
Common stock