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Other Comprehensive Income (Reclassification out of AOCI) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Apr. 01, 2017
Apr. 02, 2016
Reclassification out of Accumulated Other Comprehensive Income [Line Items]    
Cost of sales and operating expenses $ 689,627 $ 598,893
Amortization of prior service cost 9 7
Amortization of actuarial loss 1,203 1,168
Total before tax 9,216 4,526
Income taxes (1,818) (1,863)
Net income attributable to Darling 5,829 1,079
Reclassification out of Accumulated Other Comprehensive Income [Member]    
Reclassification out of Accumulated Other Comprehensive Income [Line Items]    
Net income attributable to Darling (34) 176
Reclassification out of Accumulated Other Comprehensive Income [Member] | Derivative Instruments [Member]    
Reclassification out of Accumulated Other Comprehensive Income [Line Items]    
Total before tax 1,185 1,474
Income taxes (460) (572)
Net income attributable to Darling 725 902
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 1,185 1,474
Reclassification out of Accumulated Other Comprehensive Income [Member] | Foreign Currency Translation [Member]    
Reclassification out of Accumulated Other Comprehensive Income [Line Items]    
Amortization of prior service cost (9) (7)
Amortization of actuarial loss (1,203) (1,168)
Amortization of settlement 0 0
Total before tax (1,212) (1,175)
Income taxes 453 449
Net income attributable to Darling $ (759) $ (726)