Financial Contracts Hedging Commodity and Interest Rate Risk (Detail) - Cash Flow Hedging $ in Thousands	Jul. 18, 2015 USD ($)
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of interest rate swap	$ 119,126
Wheat Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of interest rate swap	89,546
Soybean Oil Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of interest rate swap	18,130
Natural Gas Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of interest rate swap	$ 11,450