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Financial Instruments and Risk Management (Details) (USD $) In Thousands, unless otherwise specified | 6 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 29, 2014 | Mar. 30, 2013 | Sep. 28, 2013
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 | 4 months |  | 4 months
Derivatives, Fair Value [Line Items] |  |  |
Fair value - assets | $ 6,508 |  | $ 6,438
Fair value - liabilities | 6,780 |  | 6,034
Reconciliation of beginning and ending balances of assets measured at fair value on recurring basis using significant unobservable inputs [Rollforward] |  |  |
Beginning balance of over-the-counter options | 1,847 | 5,002 | 5,002
Beginning balance realized during the period | (389) | (3,604) |
Contracts purchased during the period | 0 | 1,991 |
Change in the fair value of outstanding contracts | 42 | (962) |
Ending balance of over-the-counter options | 1,500 | 2,427 | 1,847
Reconciliation of beginning and ending balances of liabilities measured at fair value on recurring basis using significant unobservable inputs [Rollforward] |  |  |
Beginning balance of over-the-counter options | 0 | 1,209 | 1,209
Beginning balance realized during the period | 0 | (1,151) |
Contracts purchased during the period | 159 | 0 |
Change in the fair value of outstanding contracts | 0 | (54) |
Ending balance of over-the-counter options | 159 | 4 | 0
Commodity-Related Derivatives [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Fair value - assets | 4,013 |  | 3,634
Fair value - liabilities | 2,300 |  | 802
Interest Rate Swaps [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Fair value - assets | 2,495 |  | 2,804
Fair value - liabilities | 4,480 |  | 5,232
Derivatives Not Designated as Hedging Instruments [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Fair value - assets | 2,511 |  | 3,262
Derivatives Not Designated as Hedging Instruments [Member] | Commodity-Related Derivatives [Member] | Other Current Assets [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Fair value - assets | 2,421 |  | 2,546
Derivatives Not Designated as Hedging Instruments [Member] | Commodity-Related Derivatives [Member] | Other Assets [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Fair value - assets | 90 |  | 716
Derivatives Not Designated as Hedging Instruments [Member] | Commodity-Related Derivatives [Member] | Other Current Liabilities [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Fair value - liabilities | 798 |  | 430
Derivatives Designated as Hedging Instruments [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Fair value - liabilities | 1,985 |  | 2,428
Derivatives Designated as Hedging Instruments [Member] | Interest Rate Swaps [Member] | Other Current Liabilities [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Fair value - liabilities | 1,344 |  | 1,307
Derivatives Designated as Hedging Instruments [Member] | Interest Rate Swaps [Member] | Other Liabilities [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Fair value - liabilities | $ 641 |  | $ 1,121

X
- 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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