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Commitments and Contingencies (Detail) (USD $)
 3 Months Ended
Aug. 03, 2014
Mattress Fabrics [Member]
Capital Addition Purchase Commitments [Member]
Apr. 27, 2014
Mattress Fabrics [Member]
Capital Addition Purchase Commitments [Member]
Jul. 28, 2013
Mattress Fabrics [Member]
Capital Addition Purchase Commitments [Member]
Aug. 03, 2014
Settled Litigation [Member]
Environmental Issue [Member]
Apr. 27, 2014
Settled Litigation [Member]
Environmental Issue [Member]
Jul. 28, 2013
Settled Litigation [Member]
Environmental Issue [Member]
Other Expense [Member]
Aug. 03, 2014
Settled Litigation [Member]
Environmental Issue [Member]
Site of former manufacturing plant in West Hazleton, Pennsylvania [Member]
Commitments and Contingencies Disclosure [Line Items]              
Lawsuit filing date       February 5, 2008      
Actions taken by court which impacted the lawsuit             The lawsuit involves court judgments that have been entered against the plaintiffs and against defendant Chromatex, Inc. requiring them to pay costs incurred by the United States Environmental Protection Agency ("USEPA") responding to environmental contamination at the Site, in amounts approximating $14 million, plus unspecified future environmental costs.
Amount of judgment against plaintiffs for which recovery is being sought from defendants             $ 14,000,000
Damages sought by plaintiffs             Costs incurred by the United States Environmental Protection Agency ("USEPA") responding to environmental contamination at the Site, in amounts approximating $14 million, plus unspecified future environmental costs
Charge resulted from tentative settlement of lawsuit           206,000  
Payments made for tentative settlement of lawsuit         206,000    
Lawsuit dismissed date       Jun. 05, 2014      
Open purchase commitments $ 3,500,000 $ 3,400,000 $ 403,000