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Other Comprehensive Income (Reclassification out of AOCI) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jul. 01, 2017 | Jun. 30, 2018 | Jul. 01, 2017
Reclassification out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Cost of sales and operating expenses | $ 653,001 | $ 699,244 | $ 1,331,100 | $ 1,387,210
Total before tax | (27,455) | 18,070 | 74,332 | 27,286
Income taxes | (1,683) | (7,742) | (5,395) | (9,560)
Amortization of prior service cost | 8 | 9 | 17 | 18
Amortization of actuarial loss | 888 | 1,203 | 1,776 | 2,406
Net income attributable to Darling | (30,420) | 9,149 | 66,885 | 14,978
Reclassification out of Accumulated Other Comprehensive Income [Member] |  |  |  |
Reclassification out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Net income attributable to Darling | (427) | (17) | (610) | (51)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Derivative Instruments [Member] |  |  |  |
Reclassification out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Total before tax | 323 | 1,213 | 977 | 2,398
Income taxes | (84) | (470) | (254) | (930)
Net income attributable to Darling | 239 | 743 | 723 | 1,468
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 | 0 | (14) | 0
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 | 323 | 1,213 | 991 | 2,398
Reclassification out of Accumulated Other Comprehensive Income [Member] | Foreign Currency Translation [Member] |  |  |  |
Reclassification out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Total before tax | (896) | (1,212) | (1,793) | (2,424)
Income taxes | 230 | 452 | 460 | 905
Amortization of prior service cost | (8) | (9) | (17) | (18)
Amortization of actuarial loss | (888) | (1,203) | (1,776) | (2,406)
Net income attributable to Darling | $ (666) | $ (760) | $ (1,333) | $ (1,519)

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