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Debt (Debt Summary) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 28, 2013
Dec. 29, 2012
Unsecured Debt [Member] | Darling International Senior Unsecured Notes [Member]
   
Debt Instrument [Line Items]    
Outstanding borrowings $ 250,000 $ 250,000
Revolving Credit Facility [Member] | Senior Secured Facilities [Member]
   
Debt Instrument [Line Items]    
Maximum availability 1,000,000 415,000
Borrowings outstanding 0 0
Availability 967,332 384,881
Letter of Credit [Member] | Senior Secured Facilities [Member]
   
Debt Instrument [Line Items]    
Maximum availability 100,000  
Borrowings outstanding $ 32,668 $ 30,119