| 
           Fair Value Measurements (Details) (Fair Value, Inputs, Level 2 [Member], USD $) 
        In Thousands  | 
        
           Jul. 30, 2011 
         | 
      
|---|---|
| 
           Fair Value, Inputs, Level 2 [Member] 
         | 
        |
| Fair Value Measurements (Textuals) [Abstract] | |
| Financial liabilities related to non-qualified deferred compensation plan | $ 1,936 | 
| X | ||||||||||
| 
             
- Definition 
          Fair Value Measurements. 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Financial liabilities related to non-qualified deferred compensation plan. 
  |