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Commitments and Contingencies (Detail) (USD $)
 12 Months Ended 0 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended
Apr. 27, 2014
Apr. 28, 2013
Apr. 29, 2012
Apr. 27, 2014
Minimum [Member]
Apr. 27, 2014
Maximum [Member]
Apr. 27, 2014
Mattress Fabrics [Member]
Capital Addition Purchase Commitments [Member]
Apr. 28, 2013
Mattress Fabrics [Member]
Capital Addition Purchase Commitments [Member]
Jun. 05, 2014
Subsequent Event [Member]
Environmental Issue [Member]
Apr. 27, 2014
Corporate headquarters building located in High Point, North Carolina [Member]
Apr. 27, 2014
Plant facility [Member]
Mattress Fabrics [Member]
Apr. 28, 2013
Plant facility [Member]
Mattress Fabrics [Member]
Apr. 29, 2012
Plant facility [Member]
Mattress Fabrics [Member]
Apr. 27, 2014
Pending Litigation [Member]
Environmental Issue [Member]
Apr. 27, 2014
Pending Litigation [Member]
Environmental Issue [Member]
Apr. 27, 2014
Pending Litigation [Member]
Environmental Issue [Member]
Site of former manufacturing plant in West Hazleton, Pennsylvania [Member]
Apr. 27, 2014
Pending Litigation [Member]
Environmental Issue [Member]
Other Expense [Member]
Commitments and Contingencies Disclosure [Line Items]                                
Lease terms       3 years 5 years                      
Lease terms, renewal options for additional periods         9 years                      
Rental expense for operating leases $ 2,700,000 $ 2,400,000 $ 2,200,000                          
Future minimum rental commitments for noncancellable operating leases in fiscal 2015 2,500,000                              
Future minimum rental commitments for noncancellable operating leases in fiscal 2016 2,200,000                              
Future minimum rental commitments for noncancellable operating leases in fiscal 2017 689,000                              
Future minimum rental commitments for noncancellable operating leases in fiscal 2018 155,000                              
Future minimum rental commitments for noncancellable operating leases in fiscal 2019 31,000                              
Monthly payments under operating lease                 29,706 12,704            
Rental payments                   152,000 152,000 152,000        
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           $ 3,400,000 $ 170,000