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Stock Compensation Plans (Narrative) (Details) - USD ($)
1 Months Ended 12 Months Ended
Jul. 28, 2005
Jan. 31, 2017
Jun. 03, 2017
May 28, 2016
May 30, 2015
Oct. 05, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Restricted stock units granted from treasury (in shares)     86,215 78,560    
Stock based compensation expense (benefit)     $ 3,400,000 $ 1,700,000 $ 2,300,000  
Payments for liability awards exercised     $ 0 1,400,000 $ 373,000  
2012 Omnibus Long-Term Incentive Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Incentive plan shares authorized (in shares)           1,000,000
Restricted stock units granted from treasury (in shares)   86,215.000        
Vesting period     3 years      
Unrecognized compensation expense     $ 5,900,000 $ 5,600,000    
Weighted average period of unrecognized compensation expense     2 years 21 days      
Stock Appreciation Rights Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Incentive plan shares authorized (in shares) 2,000,000          
Vesting period 5 years          
Term 10 years