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Consolidated Balance Sheets (Parenthetical) (USD $)
Dec. 27, 2014
Dec. 28, 2013
Statement of Financial Position [Abstract]    
Preferred stock, par value $ 1us-gaap_PreferredStockParOrStatedValuePerShare $ 1us-gaap_PreferredStockParOrStatedValuePerShare
Preferred stock, shares authorized 1,000,000us-gaap_PreferredStockSharesAuthorized 1,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued 0us-gaap_PreferredStockSharesIssued 0us-gaap_PreferredStockSharesIssued
Common stock, par value $ 1us-gaap_CommonStockParOrStatedValuePerShare $ 1us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares authorized 60,000,000us-gaap_CommonStockSharesAuthorized 60,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued 25,692,000us-gaap_CommonStockSharesIssued 25,080,000us-gaap_CommonStockSharesIssued
Common stock, shares outstanding 25,692,000us-gaap_CommonStockSharesOutstanding 25,080,000us-gaap_CommonStockSharesOutstanding