Segment Information - Balance Sheet Information by Operating Segments (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	Apr. 28, 2013	Jan. 27, 2013	Oct. 28, 2012	Jul. 29, 2012	Apr. 29, 2012	Jan. 29, 2012	Oct. 30, 2011	Jul. 31, 2011	Apr. 28, 2013 Mattress Fabrics [Member] United States [Member]	Apr. 29, 2012 Mattress Fabrics [Member] United States [Member]	May 01, 2011 Mattress Fabrics [Member] United States [Member]	Apr. 28, 2013 Mattress Fabrics [Member] Canada [Member]	Apr. 29, 2012 Mattress Fabrics [Member] Canada [Member]	May 01, 2011 Mattress Fabrics [Member] Canada [Member]	Apr. 28, 2013 Unallocated corporate [Member]	Apr. 29, 2012 Unallocated corporate [Member]	May 01, 2011 Unallocated corporate [Member]	Apr. 28, 2013 Upholstery Fabrics [Member] United States [Member]	Apr. 29, 2012 Upholstery Fabrics [Member] United States [Member]	May 01, 2011 Upholstery Fabrics [Member] United States [Member]	Apr. 28, 2013 Upholstery Fabrics [Member] China [Member]	Apr. 29, 2012 Upholstery Fabrics [Member] China [Member]	May 01, 2011 Upholstery Fabrics [Member] China [Member]	Apr. 28, 2013 Upholstery Fabrics [Member] Poland [Member]	Apr. 29, 2012 Upholstery Fabrics [Member] Poland [Member]	May 01, 2011 Upholstery Fabrics [Member] Poland [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment	$ 30,594	$ 30,055	$ 30,621	$ 31,016	$ 31,279	$ 30,285	$ 30,431	$ 30,615	$ 20,400	$ 21,200	$ 20,000	$ 8,200	$ 8,000	$ 8,600	$ 786	$ 918	$ 748	$ 908	$ 837	$ 727	$ 265	$ 183	$ 184	$ 57	$ 104	$ 56