Financial Contracts Hedging Commodity Risk (Detail) - Cash Flow Hedging $ in Thousands	Jul. 14, 2018 USD ($)
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate Notional Amount	$ 206,021
Wheat Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate Notional Amount	150,968
Soybean Oil Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate Notional Amount	22,087
Natural Gas Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate Notional Amount	15,799
Corn Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate Notional Amount	$ 17,167