Financial Contracts Hedging Commodity and Interest Rate Risk (Detail) - Cash Flow Hedging $ in Thousands	Jul. 16, 2016 USD ($)
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of interest rate swap	$ 99,199
Wheat Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of interest rate swap	85,960
Soybean Oil Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of interest rate swap	6,607
Natural Gas Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of interest rate swap	$ 6,632