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Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 28, 2013 | Dec. 29, 2012 | Dec. 31, 2011
Comprehensive Income Loss [Line Items] |  |  |
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, before Tax | $ 18,773 | $ (6,768) | $ (19,280)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized (Gain) Loss Arising During Period, Tax | (6,904) | 2,623 | 7,474
Actuarial (loss)/gain recognized during the period | 11,869 | (4,145) | (11,806)
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, before Tax | 5,202 | 4,756 | 2,724
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Tax | (2,018) | (1,844) | (1,056)
Reclassification adjustments | 3,184 | 2,912 | 1,668
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Arising During Period, before Tax |  |  | (103)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Benefit Plan Improvement, Tax Effect |  |  | 40
Prior service cost arising during the period | 0 | 0 | (63)
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Benefit Cost, before Tax | 142 | 103 | 90
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Pension Cost, Tax | (55) | (39) | (35)
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Pension Cost, Net of Tax | 87 | 64 | 55
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax, Portion Attributable to Parent | 24,117 | (1,909) | 16,569
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax, Portion Attributable to Parent | (8,977) | 740 | 6,423
Pension liability adjustments, net of tax | (15,140) | 1,169 | 10,146
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax | 7,600 | (300) |
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax | (2,900) | (100) |
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent | 11,686 | (693) | (16,194)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent | (9,780) | 268 | 6,278
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent | 1,906 | (425) | (9,916)
Foreign currency translation adjustments, net of tax | (14,502) | 0 | 0
Natural Gas Swap [Member] |  |  |
Comprehensive Income Loss [Line Items] |  |  |
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax | (41) | 1,267 | 441
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Tax | 16 | (491) | (170)
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax | (25) | 776 | 271
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax | 248 | (628) | (1,229)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax | (96) | 243 | 476
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax | 152 | (385) | (753)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax, Portion Attributable to Parent | 207 | 639 | (788)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax, Portion Attributable to Parent | (80) | (248) | 306
Derivative adjustments | 127 | 391 | (482)
Interest Rate Swap [Member] |  |  |
Comprehensive Income Loss [Line Items] |  |  |
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax |  | 260 | 1,163
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Tax |  | (101) | (451)
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax |  | 159 | 712
Derivative adjustments | 0 | 159 | 712
Corn Option [Member] |  |  |
Comprehensive Income Loss [Line Items] |  |  |
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax |  | (5,486) |
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Tax |  | 2,129 |
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax |  | (3,357) |
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax | 7,350 | 317 |
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax | (2,852) | (123) |
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax | 4,498 | 194 |
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax, Portion Attributable to Parent | 1,864 |  |
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax, Portion Attributable to Parent | (723) |  |
Derivative adjustments | 1,141 | 194 | 0
Accumulated Other Comprehensive Income (Loss) [Member] |  |  |
Comprehensive Income Loss [Line Items] |  |  |
Pension liability adjustments, net of tax | (15,140) | 1,169 | (10,146)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax | (14,502) |  |
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax | 0 |  |
Foreign currency translation adjustments, net of tax | (14,502) |  |
Accumulated Other Comprehensive Income (Loss) [Member] | Natural Gas Swap [Member] |  |  |
Comprehensive Income Loss [Line Items] |  |  |
Derivative adjustments | 127 | 391 | (482)
Accumulated Other Comprehensive Income (Loss) [Member] | Interest Rate Swap [Member] |  |  |
Comprehensive Income Loss [Line Items] |  |  |
Derivative adjustments |  | 159 | 712
Accumulated Other Comprehensive Income (Loss) [Member] | Corn Option [Member] |  |  |
Comprehensive Income Loss [Line Items] |  |  |
Derivative adjustments | $ 1,141 | $ 194 |

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- Definition Amount before tax of cost (credit) of benefit changes attributable to plan participants' prior service resulting from a plan amendment or plan initiation that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e637-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=28358780&loc=SL7669646-108580 + Details
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- Definition Amount after tax of (increase) decrease in the value of the projected benefit obligation related to a change in an actuarial assumption and increase (decrease) in the value of the plan assets resulting from experience different from that assumed, that has not been recognized in net periodic benefit (cost) credit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e637-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=28358780&loc=SL7669646-108580 + Details
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- Definition Amount of tax expense (benefit) related to (increase) decrease in the value of the projected benefit obligation related to a change in an actuarial assumption and increase (decrease) in the value of the plan assets resulting from experience different from that assumed, that has not been recognized in net periodic benefit (cost) credit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e640-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i-k) -URI http://asc.fasb.org/extlink&oid=28358780&loc=SL7669646-108580 + Details
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