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Concentration of Credit Risk and Significant Customers and Suppliers - Additional Information (Detail) | 12 Months Ended
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Sep. 24, 2016 | Sep. 26, 2015 | Sep. 27, 2014
Concentration Risk [Line Items] |  |  |
Percentage of net sales | 42.00% | 40.00% | 41.00%
Percentage of accounts receivable | 41.00% | 35.00% |
Percentage of accounts receivable including Company's largest customer | 11.00% | 12.00% |
Percentage of cost of goods sold | 9.00% | 11.00% | 10.00%
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Customer One [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Percentage of largest customer accounted of the Company's net sales | 15.00% | 16.00% | 17.00%
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Customer Two [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Percentage of largest customer accounted of the Company's net sales | 8.00% | 8.00% | 7.00%
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Customer Three [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Percentage of largest customer accounted of the Company's net sales | 8.00% | 7.00% | 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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