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Balance Sheets (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Current Assets    
Cash and cash equivalents $ 30,978 $ 81,056
Trade receivables, net 43,018 42,225
Gross inventories 55,827 49,004
Less LIFO reserve (38,089) (37,476)
Less excess and obsolescence reserve (1,729) (1,311)
Net inventories 16,009 10,217
Deferred income taxes 5,284 5,776
Prepaid expenses and other current assets 1,632 6,968
Total Current Assets 96,921 146,242
Property, plant and equipment 195,713 169,142
Less allowances for depreciation (129,720) (116,195)
Net property, plant and equipment 65,993 52,947
Deferred income taxes 2,004 32
Other assets 9,568 7,289
Total Assets 174,486 206,510
Current Liabilities    
Trade accounts payable and accrued expenses 38,500 28,592
Product liability 720 1,305
Employee compensation and benefits 15,182 14,882
Workers' compensation 4,600 4,600
Income taxes payable 489 217
Total Current Liabilities 59,491 49,596
Accrued pension liability 19,626 19,082
Product liability 337 441
Contingent liabilities - Note 16      
Stockholders' Equity    
Additional paid-in capital 15,531 10,454
Retained earnings 123,442 168,981
Less: Treasury stock - at cost 2012 and 2011 - 4,299,434 shares (37,884) (37,884)
Accumulated other comprehensive loss (29,620) (27,543)
Total Stockholders' Equity 95,032 137,391
Total Liabilities and Stockholders' Equity 174,486 206,510
Nonvoting Common Stock [Member]
    
Stockholders' Equity    
Common Stock      
Voting Common Stock [Member]
    
Stockholders' Equity    
Common Stock $ 23,563 $ 23,383