Subsquent Events	12 Months Ended
Jan. 01, 2011
Notes to Financial Statements [Abstract]
Subsquent Events	SUBSEQUENT EVENTS The Company announced on January 21, 2011 that a wholly-owned subsidiary of Darling entered into a limited liability company agreement with a wholly-owned subsidiary of Valero Energy Corporation (“Valero”) to form Diamond Green Diesel Holdings LLC (the “Joint Venture”). The Joint Venture will be owned 50% / 50% with Valero and was formed to design, engineer, construct and operate a renewable diesel plant (the “Facility”), which will be capable of producing approximately 9,300 barrels per day of renewable diesel fuel and certain other co-products, to be located adjacent to Valero's refinery in Norco, Louisiana. The Joint Venture intends to construct the Facility under an engineering, procurement and construction contract that is intended to fix the Company's maximum economic exposure for the cost of the Facility. On May 31, 2011, the Joint Venture and Diamond Green Diesel LLC, a wholly-owned subsidiary of the Joint Venture (“Opco”), entered into (i) a facility agreement (the “Facility Agreement”) with Diamond Alternative Energy, LLC, a wholly-owned subsidiary of Valero (the “Lender”), and (ii) a loan agreement (the “Loan Agreement”) with the Lender, which will provide the Joint Venture with a 14 year multiple advance term loan facility of approximately $221,300,000 (the “JV Loan”) to support the design, engineering and construction of the Facility. In connection with the Facility Agreement and the Loan Agreement, the Joint Venture terminated discussions with the U.S. Department of Energy (“DOE”) regarding the DOE's offer to the Joint Venture of a conditional commitment to issue a loan guarantee under the Energy Policy Act of 2005. The Facility Agreement and the Loan Agreement prohibit the Lender from assigning all or any portion of the Facility Agreement or the Loan Agreement to unaffiliated third parties. Opco has also pledged substantially all of its assets to the Lender, and the Joint Venture has pledged all of Opco's equity interests to the Lender, until the JV Loan has been paid in full and the JV Loan has terminated accordance with its terms. Pursuant to sponsor support agreements executed in connection with the Facility Agreement and the Loan Agreement, each of the Company and Valero are committed to contributing approximately $93.2 million of the estimated aggregate costs of approximately $407.7 million for the completion of the Facility. The Company is also required to pay for 50% of any cost overruns incurred in connection with the construction of the Facility. The ultimate cost of the Joint Venture to the Company cannot be determined until, among other things, further detailed engineering reports and studies have been completed. On January 27, 2011, the Company entered into an underwritten public offering for 24,193,548 shares of its common stock, at a price to the public of $12.70 per share, pursuant to an effective shelf registration statement. The offering closed on February 2, 2011. In addition, certain former stockholders of Griffin Industries, Inc. (pursuant to such stockholders' contractual registration rights) granted the underwriters a 30-day option, which the underwriters subsequently exercised in full, to purchase from them up to an additional 3,629,032 shares of Darling common stock to cover over-allotments. The Company used the net proceeds of approximately $292.7 million from the offering to repay all of its outstanding revolver balance and a portion of its term loan facility under the Company's Credit Agreement. Darling did not receive any proceeds from the sale of shares by the former stockholders of Griffin

SUBSEQUENT EVENTS

The Company announced on January 21, 2011 that a wholly-owned subsidiary of Darling entered into a limited liability company agreement with a wholly-owned subsidiary of Valero Energy Corporation (“Valero”) to form Diamond Green Diesel Holdings LLC (the “Joint Venture”). The Joint Venture will be owned 50% / 50% with Valero and was formed to design, engineer, construct and operate a renewable diesel plant (the “Facility”), which will be capable of producing approximately 9,300 barrels per day of renewable diesel fuel and certain other co-products, to be located adjacent to Valero's refinery in Norco, Louisiana. The Joint Venture intends to construct the Facility under an engineering, procurement and construction contract that is intended to fix the Company's maximum economic exposure for the cost of the Facility.

On May 31, 2011, the Joint Venture and Diamond Green Diesel LLC, a wholly-owned subsidiary of the Joint Venture (“Opco”), entered into (i) a facility agreement (the “Facility Agreement”) with Diamond Alternative Energy, LLC, a wholly-owned subsidiary of Valero (the “Lender”), and (ii) a loan agreement (the “Loan Agreement”) with the Lender, which will provide the Joint Venture with a 14 year multiple advance term loan facility of approximately $221,300,000 (the “JV Loan”) to support the design, engineering and construction of the Facility. In connection with the Facility Agreement and the Loan Agreement, the Joint Venture terminated discussions with the U.S. Department of Energy (“DOE”) regarding the DOE's offer to the Joint Venture of a conditional commitment to issue a loan guarantee under the Energy Policy Act of 2005. The Facility Agreement and the Loan Agreement prohibit the Lender from assigning all or any portion of the Facility Agreement or the Loan Agreement to unaffiliated third parties. Opco has also pledged substantially all of its assets to the Lender, and the Joint Venture has pledged all of Opco's equity interests to the Lender, until the JV Loan has been paid in full and the JV Loan has terminated accordance with its terms.

Pursuant to sponsor support agreements executed in connection with the Facility Agreement and the Loan Agreement, each of the Company and Valero are committed to contributing approximately $93.2 million of the estimated aggregate costs of approximately $407.7 million for the completion of the Facility. The Company is also required to pay for 50% of any cost overruns incurred in connection with the construction of the Facility. The ultimate cost of the Joint Venture to the Company cannot be determined until, among other things, further detailed engineering reports and studies have been completed.

On January 27, 2011, the Company entered into an underwritten public offering for 24,193,548 shares of its common stock, at a price to the public of $12.70 per share, pursuant to an effective shelf registration statement. The offering closed on February 2, 2011. In addition, certain former stockholders of Griffin Industries, Inc. (pursuant to such stockholders' contractual registration rights) granted the underwriters a 30-day option, which the underwriters subsequently exercised in full, to purchase from them up to an additional 3,629,032 shares of Darling common stock to cover over-allotments. The Company used the net proceeds of approximately $292.7 million from the offering to repay all of its outstanding revolver balance and a portion of its term loan facility under the Company's Credit Agreement. Darling did not receive any proceeds from the sale of shares by the former stockholders of Griffin