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Accumulated Other Comprehensive Income (Loss) Related to Derivative Transactions (Detail) (USD $)	3 Months Ended		9 Months Ended
	Oct. 05, 2013	Oct. 06, 2012	Oct. 05, 2013	Oct. 06, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Accumulated other comprehensive income (loss) related to commodity price risk and interest rate risk derivative transactions	$ (1,585,000)	$ 39,000	$ (17,124,000)	$ 2,988,000
Commodity price risk derivatives | Closed Or Expiring Over The Next Four Years
Derivative Instruments, Gain (Loss) [Line Items]
Accumulated other comprehensive income (loss) related to commodity price risk and interest rate risk derivative transactions			(6,000,000)
Commodity price risk derivatives | Closed Or Expiring Over The Next Four Years | Closed Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Estimated amount of derivatives to be reclassified in income from AOCI			(3,300,000)
Commodity price risk derivatives | Closed Or Expiring Over The Next Four Years | Expiring in 2013
Derivative Instruments, Gain (Loss) [Line Items]
Accumulated other comprehensive income (loss) related to commodity price risk and interest rate risk derivative transactions			(100,000)
Commodity price risk derivatives | Closed Or Expiring Over The Next Four Years | Expiring in 2014
Derivative Instruments, Gain (Loss) [Line Items]
Accumulated other comprehensive income (loss) related to commodity price risk and interest rate risk derivative transactions			(2,200,000)
Commodity price risk derivatives | Closed Or Expiring Over The Next Four Years | Expiring in 2015
Derivative Instruments, Gain (Loss) [Line Items]
Accumulated other comprehensive income (loss) related to commodity price risk and interest rate risk derivative transactions			(300,000)
Commodity price risk derivatives | Closed Or Expiring Over The Next Four Years | Expiring in 2016
Derivative Instruments, Gain (Loss) [Line Items]
Accumulated other comprehensive income (loss) related to commodity price risk and interest rate risk derivative transactions			$ (100,000)

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- Definition

The estimated value of gains (losses), net anticipated to be transferred in the future from accumulated other comprehensive income into earnings.

+ References

No definition available.

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- Definition

The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959

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