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Other Comprehensive Income (Reclassification out of AOCI) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 30, 2019 | Mar. 31, 2018
Reclassification out of Accumulated Other Comprehensive Income [Line Items] |  |
Net sales | $ 835,104 | $ 875,374
Cost of sales and operating expenses | 646,663 | 678,099
Total before tax | 24,914 | 101,787
Income taxes | (5,274) | (3,712)
Amortization of prior service cost | 9 | 9
Amortization of actuarial loss | 1,146 | 888
Net income attributable to Darling | 18,012 | 97,305
Reclassification out of Accumulated Other Comprehensive Income [Member] |  |
Reclassification out of Accumulated Other Comprehensive Income [Line Items] |  |
Net income attributable to Darling | (858) | (182)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Derivative Instruments [Member] |  |
Reclassification out of Accumulated Other Comprehensive Income [Line Items] |  |
Total before tax | 0 | 654
Income taxes | 0 | (169)
Net income attributable to Darling | 0 | 485
Reclassification out of Accumulated Other Comprehensive Income [Member] | Derivative Instruments [Member] | Natural Gas Swap [Member] |  |
Reclassification out of Accumulated Other Comprehensive Income [Line Items] |  |
Cost of sales and operating expenses | 0 | (14)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Derivative Instruments [Member] | Corn Option [Member] |  |
Reclassification out of Accumulated Other Comprehensive Income [Line Items] |  |
Cost of sales and operating expenses | 0 | 668
Reclassification out of Accumulated Other Comprehensive Income [Member] | Foreign Currency Translation [Member] |  |
Reclassification out of Accumulated Other Comprehensive Income [Line Items] |  |
Total before tax | (1,155) | (897)
Income taxes | 297 | 230
Amortization of prior service cost | (9) | (9)
Amortization of actuarial loss | (1,146) | (888)
Net income attributable to Darling | $ (858) | $ (667)

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