Segment Information - Narrative (Detail)	12 Months Ended
	Apr. 28, 2013	Apr. 29, 2012	May 01, 2011
Currency Concentration Risk [Member] | Net sales [Member]
Segment Reporting Information [Line Items]
Concentration risk percentage	85.00%	86.00%	83.00%
Geographic Concentration Risk [Member] | Net sales [Member] | International [Member]
Segment Reporting Information [Line Items]
Concentration risk percentage	23.00%	21.00%	22.00%
Customer Concentration Risk [Member] | Net sales [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
Concentration risk percentage	13.00%	13.00%	12.00%
Number of major customer	1	1	1
Customer Concentration Risk [Member] | Net sales [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
Concentration risk percentage	22.00%	22.00%	23.00%
Number of major customer	2	2	2
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
Concentration risk percentage	10.00%	12.00%
Number of major customer	0	1
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
Concentration risk percentage	10.00%	10.00%
Number of major customer	1	0