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Comprehensive Income Reclassifications (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Dec. 31, 2016 | Oct. 01, 2016 | Jul. 02, 2016 | Apr. 02, 2016 | Jan. 02, 2016 | Oct. 03, 2015 | Jul. 04, 2015 | Apr. 04, 2015 | Dec. 31, 2016 | Jan. 02, 2016 | Jan. 03, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cost of sales and operating expenses |  |  |  |  |  |  |  |  |  | $ 2,641,734 | $ 2,654,025 | $ 3,123,171
Amortization of prior service cost |  |  |  |  |  |  |  |  |  | (36) | 67 | (23)
Amortization of actuarial loss |  |  |  |  |  |  |  |  |  | 4,632 | 5,101 | 2,078
Amortization of curtailment |  |  |  |  |  |  |  |  |  | 0 | (1,181) |
Amortization of settlement |  |  |  |  |  |  |  |  |  | (114) | 5,291 |
Income taxes |  |  |  |  |  |  |  |  |  | (15,315) | (13,501) | (13,141)
Net income |  | $ 40,541 | $ 28,694 | $ 31,999 | $ 1,079 | $ 84,429 | $ (9,087) | $ 3,080 | $ 109 | 102,313 | 78,531 | 64,215
Reclassification out of Accumulated Other Comprehensive Income [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  |  | (434) | (5,126) | 1,201
Reclassification out of Accumulated Other Comprehensive Income [Member] | Derivative Instruments |  |  |  |  |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Income from operations before income taxes |  |  |  |  |  |  |  |  |  | 3,868 | 1,517 | 4,064
Income taxes |  |  |  |  |  |  |  |  |  | (1,501) | (589) | (1,577)
Net income |  |  |  |  |  |  |  |  |  | 2,367 | 928 | 2,487
Reclassification out of Accumulated Other Comprehensive Income [Member] | Derivative Instruments | Natural Gas Swap [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cost of sales and operating expenses |  |  |  |  |  |  |  |  |  | 0 | 0 | 196
Reclassification out of Accumulated Other Comprehensive Income [Member] | Derivative Instruments | Corn Option [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cost of sales and operating expenses |  |  |  |  |  |  |  |  |  | 3,868 | 1,517 | 3,868
Reclassification out of Accumulated Other Comprehensive Income [Member] | Defined Benefit Pension Plans |  |  |  |  |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Amortization of prior service cost | [1] |  |  |  |  |  |  |  |  | (36) | 67 | (23)
Amortization of actuarial loss | [1] |  |  |  |  |  |  |  |  | (4,632) | (5,101) | (2,078)
Amortization of curtailment | [1] |  |  |  |  |  |  |  |  | 0 | 1,181 | 0
Amortization of settlement | [1] |  |  |  |  |  |  |  |  | 114 | (5,291) | 0
Income from operations before income taxes |  |  |  |  |  |  |  |  |  | (4,554) | (9,144) | (2,101)
Income taxes |  |  |  |  |  |  |  |  |  | 1,753 | 3,090 | 815
Net income |  |  |  |  |  |  |  |  |  | $ (2,801) | $ (6,054) | $ (1,286)
[1] | These items are included in the computation of net periodic pension cost. See Note 15 Employee Benefit Plans for additional information.

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