Derivatives (Fair Value) (Details) - USD ($) $ in Thousands	Apr. 01, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value	$ 7,330	$ 13,325
Liability Derivatives Fair Value	828	730
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value	2,898	4,235
Liability Derivatives Fair Value	66	0
Designated as Hedging Instrument [Member] | Corn Option [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value	2,645	4,235
Designated as Hedging Instrument [Member] | Corn Option [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value	253	0
Designated as Hedging Instrument [Member] | Corn Option [Member] | Accrued Expenses [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives Fair Value	36	0
Designated as Hedging Instrument [Member] | Corn Option [Member] | Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives Fair Value	30	0
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value	4,432	9,090
Liability Derivatives Fair Value	762	730
Not Designated as Hedging Instrument [Member] | Corn Option [Member] | Accrued Expenses [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives Fair Value	76	122
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value	4,053	8,939
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Accrued Expenses [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives Fair Value	681	608
Not Designated as Hedging Instrument [Member] | Corn options and futures [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value	136	151
Not Designated as Hedging Instrument [Member] | Soybean Meal [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value	243	0
Not Designated as Hedging Instrument [Member] | Soybean Meal [Member] | Accrued Expenses [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives Fair Value	$ 5	$ 0