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Guarantor Financial Information Guarantor Financial Information Condensed Consolidating Statements of Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 30, 2017 | Sep. 30, 2017 | Jul. 01, 2017 | Apr. 01, 2017 | Dec. 31, 2016 | Oct. 01, 2016 | Jul. 02, 2016 | Apr. 02, 2016 | Dec. 30, 2017 | Dec. 31, 2016 | Jan. 02, 2016
Net income | $ 106,944 | $ 8,684 | $ 10,328 | $ 7,398 | $ 41,680 | $ 28,890 | $ 33,991 | $ 2,663 | $ 133,354 | $ 107,224 | $ 85,279
Foreign currency translation adjustments |  |  |  |  |  |  |  |  | 121,810 | (5,593) | (162,436)
Pension liability adjustments, net of tax |  |  |  |  |  |  |  |  | 5,829 | (1,016) | 4,202
Total other comprehensive income, net of tax |  |  |  |  |  |  |  |  | 126,543 | (5,984) | (156,467)
Total comprehensive income/(loss) |  |  |  |  |  |  |  |  | 259,897 | 101,240 | (71,188)
Comprehensive income attributable to noncontrolling interests |  |  |  |  |  |  |  |  | 947 | 3,015 | 9,139
Comprehensive income/(loss) attributable to Darling |  |  |  |  |  |  |  |  | 258,950 | 98,225 | (80,327)
Natural Gas Swap [Member] |  |  |  |  |  |  |  |  |  |  |
Total natural gas derivatives |  |  |  |  |  |  |  |  | (18) |  | 0
Corn Option [Member] |  |  |  |  |  |  |  |  |  |  |
Total natural gas derivatives |  |  |  |  |  |  |  |  | (1,078) | 625 | 1,767
Parent Company [Member] |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  | 133,354 | 107,224 | 85,279
Foreign currency translation adjustments |  |  |  |  |  |  |  |  | 0 | 0 | 0
Pension liability adjustments, net of tax |  |  |  |  |  |  |  |  | 4,797 | 1,766 | 83
Total other comprehensive income, net of tax |  |  |  |  |  |  |  |  | 3,701 | 2,391 | 1,850
Total comprehensive income/(loss) |  |  |  |  |  |  |  |  | 137,055 | 109,615 | 87,129
Comprehensive income attributable to noncontrolling interests |  |  |  |  |  |  |  |  | 0 | 0 | 0
Comprehensive income/(loss) attributable to Darling |  |  |  |  |  |  |  |  | 137,055 | 109,615 | 87,129
Parent Company [Member] | Natural Gas Swap [Member] |  |  |  |  |  |  |  |  |  |  |
Total natural gas derivatives |  |  |  |  |  |  |  |  | (18) |  | 0
Parent Company [Member] | Corn Option [Member] |  |  |  |  |  |  |  |  |  |  |
Total natural gas derivatives |  |  |  |  |  |  |  |  | (1,078) | 625 | 1,767
Guarantors [Member] |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  | 251,667 | 102,699 | 101,828
Foreign currency translation adjustments |  |  |  |  |  |  |  |  | 0 | 0 | 0
Pension liability adjustments, net of tax |  |  |  |  |  |  |  |  | 0 | 0 | 109
Total other comprehensive income, net of tax |  |  |  |  |  |  |  |  | 0 | 0 | 109
Total comprehensive income/(loss) |  |  |  |  |  |  |  |  | 251,667 | 102,699 | 101,937
Comprehensive income attributable to noncontrolling interests |  |  |  |  |  |  |  |  | 0 | 0 | 0
Comprehensive income/(loss) attributable to Darling |  |  |  |  |  |  |  |  | 251,667 | 102,699 | 101,937
Guarantors [Member] | Natural Gas Swap [Member] |  |  |  |  |  |  |  |  |  |  |
Total natural gas derivatives |  |  |  |  |  |  |  |  | 0 |  | 0
Guarantors [Member] | Corn Option [Member] |  |  |  |  |  |  |  |  |  |  |
Total natural gas derivatives |  |  |  |  |  |  |  |  | 0 | 0 | 0
Non-guarantors [Member] |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  | 186,913 | 120,648 | 96,543
Foreign currency translation adjustments |  |  |  |  |  |  |  |  | 121,810 | (5,593) | (162,436)
Pension liability adjustments, net of tax |  |  |  |  |  |  |  |  | 1,032 | (2,782) | 4,010
Total other comprehensive income, net of tax |  |  |  |  |  |  |  |  | 122,842 | (8,375) | (158,426)
Total comprehensive income/(loss) |  |  |  |  |  |  |  |  | 309,755 | 112,273 | (61,883)
Comprehensive income attributable to noncontrolling interests |  |  |  |  |  |  |  |  | 947 | 3,015 | 9,139
Comprehensive income/(loss) attributable to Darling |  |  |  |  |  |  |  |  | 308,808 | 109,258 | (71,022)
Non-guarantors [Member] | Natural Gas Swap [Member] |  |  |  |  |  |  |  |  |  |  |
Total natural gas derivatives |  |  |  |  |  |  |  |  | 0 |  | 0
Non-guarantors [Member] | Corn Option [Member] |  |  |  |  |  |  |  |  |  |  |
Total natural gas derivatives |  |  |  |  |  |  |  |  | 0 | 0 | 0
Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  | (438,580) | (223,347) | (198,371)
Foreign currency translation adjustments |  |  |  |  |  |  |  |  | 0 | 0 | 0
Pension liability adjustments, net of tax |  |  |  |  |  |  |  |  | 0 | 0 | 0
Total other comprehensive income, net of tax |  |  |  |  |  |  |  |  | 0 | 0 | 0
Total comprehensive income/(loss) |  |  |  |  |  |  |  |  | (438,580) | (223,347) | (198,371)
Comprehensive income attributable to noncontrolling interests |  |  |  |  |  |  |  |  | 0 | 0 | 0
Comprehensive income/(loss) attributable to Darling |  |  |  |  |  |  |  |  | (438,580) | (223,347) | (198,371)
Eliminations [Member] | Natural Gas Swap [Member] |  |  |  |  |  |  |  |  |  |  |
Total natural gas derivatives |  |  |  |  |  |  |  |  | 0 |  | 0
Eliminations [Member] | Corn Option [Member] |  |  |  |  |  |  |  |  |  |  |
Total natural gas derivatives |  |  |  |  |  |  |  |  | $ 0 | $ 0 | $ 0

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