Financial Instruments and Risk Management - Additional Information (Detail) (USD $)								12 Months Ended
	Dec. 31, 2011 Bushel	Dec. 31, 2010 Bushel	Dec. 31, 2011 Derivative Outstanding Bushel	Dec. 31, 2011 Foreign Exchange Derivative Contracts Currency, U.S. Dollar	Dec. 31, 2010 Foreign Exchange Derivative Contracts Currency, U.S. Dollar	Dec. 31, 2011 Foreign Exchange Derivative Contracts Currency, Malaysian ringgit	Dec. 31, 2010 Foreign Exchange Derivative Contracts Currency, Malaysian ringgit	Dec. 31, 2010 Crude Oil Commodity Derivative Contracts bbl	Dec. 31, 2011 Nondesignated Commodity Derivative Contracts Accounts Receivable	Dec. 31, 2010 Nondesignated Commodity Derivative Contracts Accounts Receivable	Dec. 31, 2011 Nondesignated Commodity Derivative Contracts Other Liabilities	Dec. 31, 2011 Nondesignated Commodity Derivative Contracts Accounts Payable	Dec. 31, 2010 Nondesignated Commodity Derivative Contracts Accounts Payable	Dec. 31, 2010 Nondesignated Foreign Exchange Derivative Contracts Accounts Receivable	Dec. 31, 2011 Nondesignated Foreign Exchange Derivative Contracts Accounts Payable
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Fixed-price purchase commitment contracts of bushels of corn	8,000,000	7,000,000
Open physical delivery fixed-price purchase commitment contracts	1,100,000		2,900,000
Asset Derivatives									$ 197,000	$ 750,000				$ 7,261,000
Liability Derivatives											292,000,000,000	489,000	626,000		8,459,000
Short-term derivative instruments								118,000
Increase (decrease) in income before taxes due to the impact of marking to market of derivative contracts								335,000
Short-term derivative instruments				16,000,000	38,000,000	472,000,000	366,000,000
Future maturities of long term debt in 2012	$ 350,005,000