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Financial Instruments and Risk Management - Additional Information (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
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Jun. 27, 2015 | Sep. 27, 2014
Derivative Instruments and Hedging Activities [Abstract] |  |
Maximum maturity period of highly liquid investment considered as cash equivalents | 3 months |
Margin over basis rate (in hundredths) | 1.00% |
Weighted average maturity of outstanding commodity-related derivatives | 6 months | 4 months
Cash collateral | $ 1,930 | $ 0

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- Definition Average remaining period until maturity of the derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Maximum maturity period of highly liquid investment considered as cash equivalents. + References No definition available. + Details
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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition Amount of right to receive cash collateral under master netting arrangements that have not been offset against derivative liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226016-175313 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56946850&loc=d3e41678-113959 + Details
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