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Guarantor Financial Information Condensed Consolidated Statements of Operations (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
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
Net Sales | $ 887,277 | $ 853,856 | $ 877,341 | $ 779,641 | $ 809,675 | $ 853,762 | $ 859,315 | $ 874,694 | $ 3,398,115 | $ 3,397,446 | $ 3,956,443
Costs and expenses: |  |  |  |  |  |  |  |  |  |  |
Cost of sales and operating expenses |  |  |  |  |  |  |  |  | 2,641,734 | 2,654,025 | 3,123,171
Selling, general and administrative expense |  |  |  |  |  |  |  |  | 314,005 | 322,574 | 374,580
Depreciation and amortization |  |  |  |  |  |  |  |  | 289,908 | 269,904 | 269,517
Acquisition and integration costs |  |  | 100 | 300 | 500 | 1,300 | 1,200 | 5,300 | 401 | 8,299 | 24,667
Total costs and expenses |  |  |  |  |  |  |  |  | 3,246,048 | 3,254,802 | 3,791,935
Operating income | 35,380 | 35,528 | 54,467 | 26,692 | 32,719 | 38,808 | 39,292 | 31,825 | 152,067 | 142,644 | 164,508
Interest expense |  |  |  |  |  |  |  |  | (94,187) | (105,530) | (135,416)
Foreign currency losses |  |  |  |  |  |  |  |  | (1,854) | (4,911) | (13,548)
Other income/(expense), net |  |  |  |  |  |  |  |  | (3,866) | (6,839) | 299
Equity in net income of unconsolidated subsidiaries |  |  |  |  |  |  |  |  | 70,379 | 73,416 | 65,609
Earnings in investments in subsidiaries |  |  |  |  |  |  |  |  | 0 | 0 | 0
Income from operations before income taxes | 47,893 | 28,146 | 41,974 | 4,526 | 84,737 | 502 | 9,602 | 3,939 | 122,539 | 98,780 | 81,452
Income taxes (benefit) |  |  |  |  |  |  |  |  | 15,315 | 13,501 | 13,141
Net income attributable to noncontrolling interests | (1,139) | (196) | (1,992) | (1,584) | (1,446) | (1,730) | (1,857) | (1,715) | (4,911) | (6,748) | (4,096)
Net income attributable to Darling | $ 40,541 | $ 28,694 | $ 31,999 | $ 1,079 | $ 84,429 | $ (9,087) | $ 3,080 | $ 109 | 102,313 | 78,531 | 64,215
Issuer [Member] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 501,856 | 475,213 | 557,316
Costs and expenses: |  |  |  |  |  |  |  |  |  |  |
Cost of sales and operating expenses |  |  |  |  |  |  |  |  | 392,876 | 369,928 | 421,883
Selling, general and administrative expense |  |  |  |  |  |  |  |  | 130,573 | 122,509 | 145,258
Depreciation and amortization |  |  |  |  |  |  |  |  | 41,106 | 34,889 | 31,183
Acquisition and integration costs |  |  |  |  |  |  |  |  | 0 | 3,177 | 20,410
Total costs and expenses |  |  |  |  |  |  |  |  | 564,555 | 530,503 | 618,734
Operating income |  |  |  |  |  |  |  |  | (62,699) | (55,290) | (61,418)
Interest expense |  |  |  |  |  |  |  |  | (60,971) | (60,945) | (97,912)
Foreign currency losses |  |  |  |  |  |  |  |  | 122 | (123) | (12,244)
Other income/(expense), net |  |  |  |  |  |  |  |  | (13,538) | (22,455) | (3,717)
Equity in net income of unconsolidated subsidiaries |  |  |  |  |  |  |  |  | (1,236) | 0 | 0
Earnings in investments in subsidiaries |  |  |  |  |  |  |  |  | 223,347 | 198,371 | 223,790
Income from operations before income taxes |  |  |  |  |  |  |  |  | 85,025 | 59,558 | 48,499
Income taxes (benefit) |  |  |  |  |  |  |  |  | (17,288) | (18,973) | (15,716)
Net income attributable to noncontrolling interests |  |  |  |  |  |  |  |  | 0 | 0 | 0
Net income attributable to Darling |  |  |  |  |  |  |  |  | 102,313 | 78,531 | 64,215
Guarantors [Member] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 1,341,925 | 1,363,279 | 1,620,054
Costs and expenses: |  |  |  |  |  |  |  |  |  |  |
Cost of sales and operating expenses |  |  |  |  |  |  |  |  | 1,085,582 | 1,108,864 | 1,330,038
Selling, general and administrative expense |  |  |  |  |  |  |  |  | 51,029 | 55,691 | 54,070
Depreciation and amortization |  |  |  |  |  |  |  |  | 105,261 | 98,400 | 83,957
Acquisition and integration costs |  |  |  |  |  |  |  |  | 0 | 0 | 0
Total costs and expenses |  |  |  |  |  |  |  |  | 1,241,872 | 1,262,955 | 1,468,065
Operating income |  |  |  |  |  |  |  |  | 100,053 | 100,324 | 151,989
Interest expense |  |  |  |  |  |  |  |  | 17,492 | 18,839 | 21,231
Foreign currency losses |  |  |  |  |  |  |  |  | (283) | (1,649) | (417)
Other income/(expense), net |  |  |  |  |  |  |  |  | 106 | 435 | (19)
Equity in net income of unconsolidated subsidiaries |  |  |  |  |  |  |  |  | 0 | 0 | 0
Earnings in investments in subsidiaries |  |  |  |  |  |  |  |  | 0 | 0 | 0
Income from operations before income taxes |  |  |  |  |  |  |  |  | 117,368 | 117,949 | 172,784
Income taxes (benefit) |  |  |  |  |  |  |  |  | 14,669 | 16,121 | 17,534
Net income attributable to noncontrolling interests |  |  |  |  |  |  |  |  | 0 | 0 | 0
Net income attributable to Darling |  |  |  |  |  |  |  |  | 102,699 | 101,828 | 155,250
Non-guarantors [Member] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 1,752,844 | 1,759,800 | 2,063,310
Costs and expenses: |  |  |  |  |  |  |  |  |  |  |
Cost of sales and operating expenses |  |  |  |  |  |  |  |  | 1,361,786 | 1,376,079 | 1,655,487
Selling, general and administrative expense |  |  |  |  |  |  |  |  | 132,403 | 144,374 | 175,252
Depreciation and amortization |  |  |  |  |  |  |  |  | 143,541 | 136,615 | 154,377
Acquisition and integration costs |  |  |  |  |  |  |  |  | 401 | 5,122 | 4,257
Total costs and expenses |  |  |  |  |  |  |  |  | 1,638,131 | 1,662,190 | 1,989,373
Operating income |  |  |  |  |  |  |  |  | 114,713 | 97,610 | 73,937
Interest expense |  |  |  |  |  |  |  |  | (50,708) | (63,424) | (58,554)
Foreign currency losses |  |  |  |  |  |  |  |  | (1,693) | (3,139) | (887)
Other income/(expense), net |  |  |  |  |  |  |  |  | 9,566 | 15,181 | 3,854
Equity in net income of unconsolidated subsidiaries |  |  |  |  |  |  |  |  | 71,615 | 73,416 | 65,609
Earnings in investments in subsidiaries |  |  |  |  |  |  |  |  | 0 | 0 | 0
Income from operations before income taxes |  |  |  |  |  |  |  |  | 143,493 | 119,644 | 83,959
Income taxes (benefit) |  |  |  |  |  |  |  |  | 17,934 | 16,353 | 11,323
Net income attributable to noncontrolling interests |  |  |  |  |  |  |  |  | (4,911) | (6,748) | (4,096)
Net income attributable to Darling |  |  |  |  |  |  |  |  | 120,648 | 96,543 | 68,540
Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | (198,510) | (200,846) | (284,237)
Costs and expenses: |  |  |  |  |  |  |  |  |  |  |
Cost of sales and operating expenses |  |  |  |  |  |  |  |  | (198,510) | (200,846) | (284,237)
Selling, general and administrative expense |  |  |  |  |  |  |  |  | 0 | 0 | 0
Depreciation and amortization |  |  |  |  |  |  |  |  | 0 | 0 | 0
Acquisition and integration costs |  |  |  |  |  |  |  |  | 0 | 0 | 0
Total costs and expenses |  |  |  |  |  |  |  |  | (198,510) | (200,846) | (284,237)
Operating income |  |  |  |  |  |  |  |  | 0 | 0 | 0
Interest expense |  |  |  |  |  |  |  |  | 0 | 0 | (181)
Foreign currency losses |  |  |  |  |  |  |  |  | 0 | 0 | 0
Other income/(expense), net |  |  |  |  |  |  |  |  | 0 | 0 | 181
Equity in net income of unconsolidated subsidiaries |  |  |  |  |  |  |  |  | 0 | 0 | 0
Earnings in investments in subsidiaries |  |  |  |  |  |  |  |  | (223,347) | (198,371) | (223,790)
Income from operations before income taxes |  |  |  |  |  |  |  |  | (223,347) | (198,371) | (223,790)
Income taxes (benefit) |  |  |  |  |  |  |  |  | 0 | 0 | 0
Net income attributable to noncontrolling interests |  |  |  |  |  |  |  |  | 0 | 0 | 0
Net income attributable to Darling |  |  |  |  |  |  |  |  | $ (223,347) | $ (198,371) | $ (223,790)

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