Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Balance Sheets (Parenthetical)

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Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
Mar. 30, 2013
Dec. 29, 2012
Assets    
Accumulated depreciation $ 41,684,812 $ 40,966,957
Shareholders' equity    
Common stock, par value (in dollars per share) $ 1 $ 1
Common stock, shares authorized (in shares) 12,000,000 12,000,000
Common stock, shares issued (in shares) 8,000,000 8,000,000
Common stock in treasury, at cost (in shares) 1,627,589 1,643,267