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GOODWILL AND INTANGIBLE ASSETS - Intangible Assets (Details) (USD $)
In Thousands, unless otherwise specified
 9 Months Ended 12 Months Ended
Feb. 01, 2014
Apr. 27, 2013
Intangible Assets [Line Items]    
Gross $ 42,472 $ 42,472
Accumulated Amortization 27,290 26,006
Net 15,182 16,466
Indefinite-lived trade names 1,800 1,800
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]    
2014 1,722  
2015 1,725  
2016 1,541  
2017 1,476  
2018 1,379  
Customer relationships and agreements
    
Intangible Assets [Line Items]    
Gross 16,579 16,579
Accumulated Amortization 14,574 14,213
Net 2,005 2,366
Finite-Lived Intangible Assets, Weighted Average Remaining Amortization Period 10 years 1 month 18 days 10 years 10 months 24 days
Trade names, patents and technology licences
    
Intangible Assets [Line Items]    
Gross 25,774 25,774
Accumulated Amortization 12,686 11,779
Finite-Lived Intangible Assets, Weighted Average Remaining Amortization Period 9 years 8 months 21 days 10 years 4 months 24 days
Net 13,088 13,995
Covenants not to compete
    
Intangible Assets [Line Items]    
Gross 119 119
Accumulated Amortization 30 14
Net $ 89 $ 105
Finite-Lived Intangible Assets, Weighted Average Remaining Amortization Period 3 years 8 months 0 days 4 years 4 months 24 days