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Accumulated Other Comprehensive Loss - Effects on Net Income of Significant Amounts Reclassified from Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2019 | Apr. 01, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Net sales | $ 1,351,705 | $ 1,304,187
Cost of sales | (1,081,584) | (1,053,585)
Income before income taxes | 95,462 | 97,034
Provision for income taxes | (22,624) | (23,356)
Net income | 73,768 | 74,925
Effect of settlement loss |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Non-operating pension costs | (1,322) |
Amortization of defined benefit pension items |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Non-operating pension costs | (8,932) |
Reclassification out of Accumulated Other Comprehensive Income |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Net sales | 317 | 810
Cost of sales | 147 | (585)
Net income | (7,317) | (6,782)
Reclassification out of Accumulated Other Comprehensive Income | Gains and Losses on Cash Flow Hedges |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Income before income taxes | 464 | 225
Provision for income taxes | (117) | (45)
Net income | 347 | 180
Reclassification out of Accumulated Other Comprehensive Income | Defined Benefit Pension Items |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Income before income taxes | (10,254) | (9,301)
Provision for income taxes | 2,590 | 2,339
Net income | (7,664) | (6,962)
Reclassification out of Accumulated Other Comprehensive Income | Effect of settlement loss |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Non-operating pension costs |  | 0
Reclassification out of Accumulated Other Comprehensive Income | Amortization of defined benefit pension items |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Non-operating pension costs |  | (9,301)
Reclassification out of Accumulated Other Comprehensive Income | Foreign exchange contracts | Gains and Losses on Cash Flow Hedges |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Net sales | 317 | 810
Cost of sales | (288) | (527)
Reclassification out of Accumulated Other Comprehensive Income | Commodity contracts | Gains and Losses on Cash Flow Hedges |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Net sales | 0 | 0
Cost of sales | $ 435 | $ (58)

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