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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 |

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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 + Details
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