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Stock Incentive Plans (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 3 Months Ended
Mar. 23, 2012
months
Mar. 25, 2011
Stock Options [Member]
    
Stock Incentive Plans (Textuals) [Abstract]    
Stock option and Incentive plan, shares authorized 8,000,000  
Share Based Compensation Arrangement by Share Based Payment Award Number of Shares Issued or Committed to Issue 3,207,754  
Restricted Stock [Member]
    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]    
Number of shares, Beginning Balance 1,010,127  
Weighted-average grant date fair value, Beginning balance (in dollars per share) $ 6.97  
Number of shares, Granted 365,599  
Weighted-average grant date fair value, Granted (in dollars per share) $ 9.84  
Number of shares, Additional shares from dividends 5,649  
Weighted-average grant date fair value, Additional shares from dividends (in dollars per share) $ 10.00  
Number of shares, Vested (690,718)  
Weighted-average grant date fair value, Vested (in dollars per share) $ 5.36  
Number of shares, Ending Balance 690,657  
Weighted-average grant date fair value, Ending balance (in dollars per share) $ 10.09  
Share Based Compensation Arrangement by Share Based Payment Award Restricted Stock Awards Expected to Vest One Year from Balance Sheet (shares) 5,841  
Share Based Compensation Arrangement by Share Based Payment Award Restricted Stock Awards Expected to Vest Two Years from Balance Sheet Date (in shares) 341,784  
Share Based Compensation Arrangement by Share Based Payment Award Restricted Stock Awards Expected to Vest Three Years from Balance Sheet Date (in shares) 221,163  
Share Based Compensation Arrangement by Share Based Payment Award Restricted Stock Awards Expected to Vest Four Years from Balance Sheet Date 121,869  
Summary of Stock Appreciation Rights and Dividend Equivalent Rights    
Share based payment, vesting period (in years) 3 years  
Stock Incentive Plans (Textuals) [Abstract]    
Unrecognized compensation cost (in dollars) $ 6.7  
Unrecognized compensation expense related to compensation awards, period for recognition (in months) 28  
Compensation expense (in dollars)   0.8
Restricted Stock Units (RSUs) [Member]
    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]    
Number of shares, Beginning Balance 161,575  
Weighted-average grant date fair value, Beginning balance (in dollars per share) $ 11.45  
Number of shares, Granted 89,990  
Weighted-average grant date fair value, Granted (in dollars per share) $ 11.14  
Number of shares, Additional units from dividends 1,293  
Weighted-average grant date fair value, Additional units from dividends (in dollars per share) $ 10.00  
Number of shares, Ending Balance 252,858  
Weighted-average grant date fair value, Ending balance (in dollars per share) $ 11.33  
Summary of Stock Appreciation Rights and Dividend Equivalent Rights    
Share based payment, vesting period (in years) 3 years  
Stock Incentive Plans (Textuals) [Abstract]    
Unrecognized compensation cost (in dollars) 1.9  
Unrecognized compensation expense related to compensation awards, period for recognition (in months) 28  
Compensation expense (in dollars) $ 0.2 $ 0.1
Number of Trading Days of Average Closing Price of Common Stock on Vesting Date used to Calculate Total Shareholder Return (in days) 30  
Number Of Trading Days Of Average Closing Price Of Common Stock On Grant Date Used To Calculate Total Stockholder Return (in days) 30  
Threshold Percentage Of No Payout If Stockholder Return Is Less Then Target Return (as a percent) 50.00%  
Maximum Possible Payout to Executive Officer as a Percentage of the Target Award (as a percent) 150.00%