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Other Comprehensive Income (Tables) | 3 Months Ended
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Mar. 30, 2013
Comprehensive Income [Abstract] |
Schedule of Comprehensive Income (Loss) | The components of other comprehensive income (loss) and the related tax impacts for the three months ended March 30, 2013 and March 31, 2012 are as follows (in thousands):
| Before-Tax |  | Tax (Expense) |  | Net-of-Tax
| Amount |  | or Benefit |  | Amount
| March 30, 2013 | March 31, 2012 |  | March 30, 2013 | March 31, 2012 |  | March 30, 2013 | March 31, 2012
Defined benefit pension plans |  |  |  |  |  |  |  |
Amortization of prior service cost | $ | 15 |  | $ | 22 |  |  | $ | (6 | ) | $ | (8 | ) |  | $ | 9 |  | $ | 14 |
Amortization of actuarial loss | 1,300 |  | 1,189 |  |  | (504 | ) | (461 | ) |  | 796 |  | 728 |
Total defined benefit pension plans | 1,315 |  | 1,211 |  |  | (510 | ) | (469 | ) |  | 805 |  | 742 |
Natural gas swap derivatives |  |  |  |  |  |  |  |
Loss reclassified to net income | 57 |  | 713 |  |  | (22 | ) | (276 | ) |  | 35 |  | 437 |
Gain/(loss) activity recognized in other comprehensive income (loss) | 184 |  | (700 | ) |  | (71 | ) | 270 |  |  | 113 |  | (430 | )
Total natural gas swap derivatives | 241 |  | 13 |  |  | (93 | ) | (6 | ) |  | 148 |  | 7 |
Corn option derivatives |  |  |  |  |  |  |  |
Gain reclassified to net income | (42 | ) | — |  |  | 16 |  | — |  |  | (26 | ) | — |
Gain activity recognized in other comprehensive income (loss) | 1,591 |  | — |  |  | (616 | ) | — |  |  | 975 |  | — |
Total corn option derivatives | 1,549 |  | — |  |  | (600 | ) | — |  |  | 949 |  | — |
Interest rate swap derivatives |  |  |  |  |  |  |  |
Loss reclassified to net income | — |  | 232 |  |  | — |  | (90 | ) |  | — |  | 142 |
Other comprehensive income (loss) | $ | 3,105 |  | $ | 1,456 |  |  | $ | (1,203 | ) | $ | (565 | ) |  | $ | 1,902 |  | $ | 891 |
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] | The following table presents the amounts reclassified out of each component of other comprehensive income (loss), net of tax for the three months ended March 30, 2013 and March 31, 2012 as follows (in thousands):
|  | For the Three Months Ended |  |
|  | March 30, 2013 | March 31, 2012 |  | Statement of Operations Classification
Derivative instruments |  |  |  |  |
Natural gas swap derivatives loss |  | $ | (57 | ) | $ | (713 | ) |  | Cost of sales and other operating expenses
Corn option derivatives gain |  | 42 |  | — |  |  | Cost of sales and other operating expenses
Interest rate swap derivatives loss |  | — |  | (232 | ) |  | Interest expense
|  | (15 | ) | (945 | ) |  | Total before tax
|  | 6 |  | 366 |  |  | Income tax benefit/(expense)
|  | (9 | ) | (579 | ) |  | Net of tax
Defined benefit pension plans |  |  |  |  |
Amortization of prior service cost |  | $ | (15 | ) | $ | (22 | ) |  | (a)
Amortization of actuarial loss |  | (1,300 | ) | (1,189 | ) |  | (a)
|  | (1,315 | ) | (1,211 | ) |  | Total before tax
|  | 510 |  | 469 |  |  | Income tax benefit/(expense)
|  | (805 | ) | (742 | ) |  | Net of tax
Total reclassifications |  | $ | (814 | ) | $ | (1,321 | ) |  | Net of tax
(a) | These items are included in the computation of net periodic pension cost. See Note 12 Employee Benefit Plans for additional information.
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | The following table presents changes in each component of accumulated comprehensive income (loss) as of March 30, 2013 as follows (in thousands):
|  | Three Months Ended March 30, 2013
|  | Derivative | Defined Benefit |
|  | Instruments | Pension Plans | Total
Accumulated Other Comprehensive Income (loss) December 29, 2012, net of tax |  | $ | 180 |  | $ | (31,509 | ) | $ | (31,329 | )
Other comprehensive gain before reclassifications |  | 1,088 |  | — |  | 1,088 |
Amounts reclassified from accumulated other comprehensive income (loss) |  | 9 |  | 805 |  | 814 |
Net current-period other comprehensive income |  | 1,097 |  | 805 |  | 1,902 |
Accumulated Other Comprehensive Income (loss) March 30, 2013, net of tax |  | $ | 1,277 |  | $ | (30,704 | ) | $ | (29,427 | )

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=20435746&loc=SL7669686-108580 + Details
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- Definition Tabular disclosure of components of comprehensive income (loss) including, but not limited to: (a) foreign currency translation adjustments; (b) gains (losses) on foreign currency transactions that are designated as, and are effective as, economic hedges of a net investment in a foreign entity; (c) gains (losses) on intercompany foreign currency transactions that are of a long-term-investment nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements; (d) change in the market value of a futures contract that qualifies as a hedge of an asset reported at fair value; (e) unrealized holding gains (losses) on available-for-sale securities and that resulting from transfers of debt securities from the held-to-maturity category to the available-for-sale category; (f) a net loss recognized as an additional pension liability not yet recognized as net periodic pension cost; and (g) the net gain (loss) and net prior service cost or credit for pension plans and other postretirement benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e526-108580 + Details
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