Accumulated Other Comprehensive Loss (Income) Related to Derivative Transactions (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Oct. 10, 2015	Oct. 04, 2014	Oct. 10, 2015	Oct. 04, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Accumulated other comprehensive income (loss) related to commodity price risk and interest rate risk derivative transactions	[1]	$ (2,652)	$ (9,128)	$ (1,262)	$ (10,028)
Closed or Expiring Over Next Three Years
Derivative Instruments, Gain (Loss) [Line Items]
Accumulated other comprehensive income (loss) related to commodity price risk and interest rate risk derivative transactions				8,736
Closed or Expiring Over Next Three Years | Commodity price risk derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Accumulated other comprehensive income (loss) related to commodity price risk and interest rate risk derivative transactions				7,736
Closed or Expiring Over Next Three Years | Interest rate risk derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Accumulated other comprehensive income (loss) related to commodity price risk and interest rate risk derivative transactions				1,000
Closed Contracts | Closed or Expiring Over Next Three Years
Derivative Instruments, Gain (Loss) [Line Items]
Estimated amount of derivatives to be reclassified in income from AOCI				1,930
Closed Contracts | Closed or Expiring Over Next Three Years | Commodity price risk derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Estimated amount of derivatives to be reclassified in income from AOCI				930
Closed Contracts | Closed or Expiring Over Next Three Years | Interest rate risk derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Estimated amount of derivatives to be reclassified in income from AOCI				1,000
Expiring in 2015 | Closed or Expiring Over Next Three Years
Derivative Instruments, Gain (Loss) [Line Items]
Accumulated other comprehensive income (loss) related to commodity price risk and interest rate risk derivative transactions				335
Expiring in 2015 | Closed or Expiring Over Next Three Years | Commodity price risk derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Accumulated other comprehensive income (loss) related to commodity price risk and interest rate risk derivative transactions				335
Expiring in 2016 | Closed or Expiring Over Next Three Years
Derivative Instruments, Gain (Loss) [Line Items]
Accumulated other comprehensive income (loss) related to commodity price risk and interest rate risk derivative transactions				6,541
Expiring in 2016 | Closed or Expiring Over Next Three Years | Commodity price risk derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Accumulated other comprehensive income (loss) related to commodity price risk and interest rate risk derivative transactions				6,541
Expiring in 2017 | Closed or Expiring Over Next Three Years
Derivative Instruments, Gain (Loss) [Line Items]
Accumulated other comprehensive income (loss) related to commodity price risk and interest rate risk derivative transactions				(70)
Expiring in 2017 | Closed or Expiring Over Next Three Years | Commodity price risk derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Accumulated other comprehensive income (loss) related to commodity price risk and interest rate risk derivative transactions				$ (70)

[1] Amounts in parentheses indicate debits to determine net income.