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Derivatives (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 30, 2017 USD ($) | Sep. 30, 2017 USD ($) | Jul. 01, 2017 USD ($) | Apr. 01, 2017 USD ($) | Dec. 31, 2016 USD ($) | Oct. 01, 2016 USD ($) | Jul. 02, 2016 USD ($) | Apr. 02, 2016 USD ($) | Dec. 30, 2017 USD ($) month | Dec. 31, 2016 USD ($) | Jan. 02, 2016 USD ($)
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of months cash flow hedge gain (loss) reclassified over | month |  |  |  |  |  |  |  |  | 12 |  |
Amount reclassified from accumulated other comprehensive loss into earnings over next 12 months |  |  |  |  |  |  |  |  | $ 2,200 |  |
Net income | $ 106,944 | $ 8,684 | $ 10,328 | $ 7,398 | $ 41,680 | $ 28,890 | $ 33,991 | $ 2,663 | 133,354 | $ 107,224 | $ 85,279
Asset Derivatives Fair Value | 4,346 |  |  |  | 13,325 |  |  |  | 4,346 | 13,325 |
Foreign currency losses |  |  |  |  |  |  |  |  | (6,898) | (1,854) | (4,911)
Liability Derivatives Fair Value | 2,326 |  |  |  | 730 |  |  |  | 2,326 | 730 |
Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net |  |  |  |  |  |  |  |  | 3,429 | 4,889 |
Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net |  |  |  |  |  |  |  |  | 5,220 | 3,868 |
Gain Recognized in Income on Derivatives, Ineffective Portion and Amount Excluded from Effectiveness Testing |  |  |  |  |  |  |  |  | 686 | 331 |
Gain/(loss) recognized in other comprehensive income (loss) |  |  |  |  |  |  |  |  | 3,400 | 4,900 |
Gain/(loss) recognized in other comprehensive income (loss) |  |  |  |  |  |  |  |  | (1,300) | (1,900) |
Designated as Hedging Instrument [Member] |  |  |  |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |  |  |
Asset Derivatives Fair Value | 3,418 |  |  |  | 4,235 |  |  |  | 3,418 | 4,235 |
Liability Derivatives Fair Value | 24 |  |  |  | 0 |  |  |  | 24 | 0 |
Not Designated as Hedging Instrument [Member] |  |  |  |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |  |  |
Asset Derivatives Fair Value | 928 |  |  |  | 9,090 |  |  |  | 928 | 9,090 |
Liability Derivatives Fair Value | 2,302 |  |  |  | 730 |  |  |  | 2,302 | 730 |
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member] | Accrued Expenses [Member] |  |  |  |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |  |  |
Liability Derivatives Fair Value | 2,288 |  |  |  | 608 |  |  |  | 2,288 | 608 |
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Current Assets [Member] |  |  |  |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |  |  |
Asset Derivatives Fair Value | 332 |  |  |  | 8,939 |  |  |  | 332 | 8,939 |
Corn Option [Member] |  |  |  |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gain/(loss) recognized in other comprehensive income (loss) |  |  |  |  |  |  |  |  | 3,494 | 4,889 | 4,405
Gain/(loss) recognized in other comprehensive income (loss) |  |  |  |  |  |  |  |  | (1,356) | (1,897) | $ (1,710)
Corn Option [Member] | Designated as Hedging Instrument [Member] | Other Current Assets [Member] |  |  |  |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |  |  |
Asset Derivatives Fair Value | 3,418 |  |  |  | 4,235 |  |  |  | 3,418 | 4,235 |
Commodity Contract [Member] |  |  |  |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |  |  |
Forward Purchase Amount | 19,100 |  |  |  |  |  |  |  | 19,100 |  |
Corn options and futures [Member] | Not Designated as Hedging Instrument [Member] | Accrued Expenses [Member] |  |  |  |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |  |  |
Liability Derivatives Fair Value | 14 |  |  |  | 122 |  |  |  | 14 | 122 |
Corn options and futures [Member] | Not Designated as Hedging Instrument [Member] | Other Current Assets [Member] |  |  |  |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |  |  |
Asset Derivatives Fair Value | 596 |  |  |  | 151 |  |  |  | 596 | 151 |
Natural Gas Swap [Member] |  |  |  |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gain/(loss) recognized in other comprehensive income (loss) |  |  |  |  |  |  |  |  | (65) |  |
Gain/(loss) recognized in other comprehensive income (loss) |  |  |  |  |  |  |  |  | 26 |  |
Natural Gas Swap [Member] | Designated as Hedging Instrument [Member] | Accrued Expenses [Member] |  |  |  |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |  |  |
Liability Derivatives Fair Value | $ 24 |  |  |  | $ 0 |  |  |  | 24 | 0 |
Cash Flow Hedging [Member] |  |  |  |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  | 0 |  |
Cash Flow Hedging [Member] | Corn Option [Member] |  |  |  |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net |  |  |  |  |  |  |  |  | 3,494 | 4,889 |
Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net |  |  |  |  |  |  |  |  | 5,255 | 3,868 |
Gain Recognized in Income on Derivatives, Ineffective Portion and Amount Excluded from Effectiveness Testing |  |  |  |  |  |  |  |  | 711 | 331 |
Cash Flow Hedging [Member] | Natural Gas Swap [Member] |  |  |  |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net |  |  |  |  |  |  |  |  | (65) | 0 |
Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net |  |  |  |  |  |  |  |  | (35) | 0 |
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net |  |  |  |  |  |  |  |  | $ (25) | $ 0 |

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