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Accumulated Other Comprehensive Income (Loss) Related to Derivative Transactions (Detail) (USD $)
 12 Months Ended
Dec. 28, 2013
Dec. 29, 2012
Dec. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items]      
Accumulated other comprehensive income (loss) related to commodity price risk and interest rate risk derivative transactions $ (24,457,000) $ (1,546,000) $ (17,851,000)
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 11,400,000    
Closed or Expiring Over Next Three Years | Closed Contracts
      
Derivative Instruments, Gain (Loss) [Line Items]      
Estimated amount of derivatives to be reclassified in income from AOCI 4,300,000    
Closed or Expiring Over Next Three 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 6,600,000    
Closed or Expiring Over Next Three 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 400,000    
Closed or Expiring Over Next Three Years | Expiring in 2016 and beyond
      
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 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 10,100,000    
Commodity price risk derivatives | Closed or Expiring Over Next Three Years | Closed Contracts
      
Derivative Instruments, Gain (Loss) [Line Items]      
Estimated amount of derivatives to be reclassified in income from AOCI 3,000,000    
Commodity price risk derivatives | Closed or Expiring Over Next Three 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 6,600,000    
Commodity price risk derivatives | Closed or Expiring Over Next Three 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 400,000    
Commodity price risk derivatives | Closed or Expiring Over Next Three Years | Expiring in 2016 and beyond
      
Derivative Instruments, Gain (Loss) [Line Items]      
Accumulated other comprehensive income (loss) related to commodity price risk and interest rate risk derivative transactions 100,000    
Interest rate risk derivatives | 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 1,300,000    
Interest rate risk derivatives | Closed or Expiring Over Next Three Years | Closed Contracts
      
Derivative Instruments, Gain (Loss) [Line Items]      
Estimated amount of derivatives to be reclassified in income from AOCI $ 1,300,000