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Segment Information - Balance Sheet Information by Operating Segments (Parenthetical) (Detail) (USD $)
In Thousands, unless otherwise specified
Apr. 27, 2014
Jan. 26, 2014
Oct. 27, 2013
Jul. 28, 2013
Apr. 28, 2013
Jan. 27, 2013
Oct. 28, 2012
Jul. 29, 2012
Apr. 27, 2014
Unallocated corporate [Member]
Apr. 28, 2013
Unallocated corporate [Member]
Apr. 29, 2012
Unallocated corporate [Member]
Apr. 27, 2014
Mattress Fabrics [Member]
United States [Member]
Apr. 28, 2013
Mattress Fabrics [Member]
United States [Member]
Apr. 29, 2012
Mattress Fabrics [Member]
United States [Member]
Apr. 27, 2014
Mattress Fabrics [Member]
Canada [Member]
Apr. 28, 2013
Mattress Fabrics [Member]
Canada [Member]
Apr. 29, 2012
Mattress Fabrics [Member]
Canada [Member]
Apr. 27, 2014
Upholstery Fabrics [Member]
United States [Member]
Apr. 28, 2013
Upholstery Fabrics [Member]
United States [Member]
Apr. 29, 2012
Upholstery Fabrics [Member]
United States [Member]
Apr. 27, 2014
Upholstery Fabrics [Member]
China [Member]
Apr. 28, 2013
Upholstery Fabrics [Member]
China [Member]
Apr. 29, 2012
Upholstery Fabrics [Member]
China [Member]
Apr. 27, 2014
Upholstery Fabrics [Member]
Poland [Member]
Apr. 28, 2013
Upholstery Fabrics [Member]
Poland [Member]
Apr. 29, 2012
Upholstery Fabrics [Member]
Poland [Member]
Segment Reporting Information [Line Items]                                                    
Property, plant and equipment $ 31,376 $ 30,115 $ 30,559 $ 30,808 $ 30,594 $ 30,055 $ 30,621 $ 31,016 $ 763 [1] $ 786 [1] $ 918 [1] $ 20,600 $ 20,400 $ 21,200 $ 8,400 $ 8,200 $ 8,000 $ 957 $ 908 $ 837 $ 572 $ 265 $ 183 $ 44 $ 57 $ 104
[1] The $763, $786, and $918 balance at April 27, 2014, April 28, 2013, and April 29, 2012, represent property, plant, and equipment associated with unallocated corporate departments and corporate departments shared by both the mattress and upholstery fabric segments.