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Concentration of Credit Risk and Significant Customers and Suppliers - Additional Information (Detail) - Customer | 12 Months Ended
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Sep. 26, 2015 | Sep. 27, 2014 | Sep. 28, 2013
Concentration Risk [Line Items] |  |  |
Percentage of net sales | 40.00% | 41.00% | 43.00%
Number of major customers | 5 |  |
Percentage of accounts receivable | 35.00% | 37.00% |
Percentage of accounts receivable including Company's largest customer | 12.00% | 11.00% |
Percentage of cost of goods sold | 11.00% | 10.00% | 11.00%
Number of major suppliers | 5 |  |
Customer One [Member] | Sales Revenue, Net [Member] | Customer Concentration Risk [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Percentage of largest customer accounted of the Company's net sales | 16.00% | 17.00% | 16.00%
Customer Two [Member] | Sales Revenue, Net [Member] | Customer Concentration Risk [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Percentage of largest customer accounted of the Company's net sales | 8.00% | 7.00% | 8.00%
Customer Three [Member] | Sales Revenue, Net [Member] | Customer Concentration Risk [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Percentage of largest customer accounted of the Company's net sales | 7.00% | 8.00% | 8.00%

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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 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6351-108592 Reference 2: 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=49121117&loc=d3e13531-108611 Reference 3: 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=51801978&loc=d3e6404-108592 Reference 4: 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=49121117&loc=d3e13537-108611 + Details
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