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Stock-Based Compensation (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
May. 20, 2015
May. 01, 2014
May. 01, 2013
Jan. 02, 2016
Dec. 27, 2014
Dec. 28, 2013
May. 31, 2008
Narrative Disclosures [Abstract]              
Stock-based compensation provision       $ 1,636 $ 2,420 $ 3,739  
Stock compensation, tax benefit       400 $ 600 $ 700  
Unrecognized share based compensation expense       $ 2,600      
Unrecognized share based compensation costs, amortization period (years)       2 years 4 months 2 days      
Stock Options [Member]              
Narrative Disclosures [Abstract]              
Maximum remaining contractual term (years)       6 years      
Vesting period (years)       4 years      
RSUs [Member]              
Narrative Disclosures [Abstract]              
Vesting period (years)       4 years      
Shares granted (shares)       695,944 88,236 549,500  
RSU fair value       $ 600 $ 1,700 $ 1,600  
Performance Shares [Member]              
Narrative Disclosures [Abstract]              
Stock-based compensation provision           $ 0  
Shares granted (shares) 590,000   730,500 590,000 0 730,500  
2007 Long-term Equity Incentive Plan [Member]              
Narrative Disclosures [Abstract]              
Number of shares authorized for issuance (shares)             4,500,000
2007 Long-term Equity Incentive Plan [Member] | Stock Options [Member]              
Narrative Disclosures [Abstract]              
Number of additional shares authorized for issuance (shares)           1,040,000  
Director [Member] | RSUs [Member]              
Narrative Disclosures [Abstract]              
Vesting period (years) 1 year 1 year       1 year  
Shares granted (shares) 113,444 88,236       130,000  
Executives [Member] | RSUs [Member]              
Narrative Disclosures [Abstract]              
Vesting period (years) 4 years         4 years  
Shares granted (shares) 582,500         419,500