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Debt (Details) (USD $) | 6 Months Ended | 0 Months Ended | 6 Months Ended |  |  |  |  | 0 Months Ended | 6 Months Ended |  | 6 Months Ended |  |  |  |  |  | 6 Months Ended
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Jun. 29, 2013 | Jun. 30, 2012 | Dec. 17, 2010 Secured Debt [Member] Revolving Credit Facility | Jun. 29, 2013 Secured Debt [Member] Revolving Credit Facility | Dec. 29, 2012 Secured Debt [Member] Revolving Credit Facility | Mar. 25, 2011 Secured Debt [Member] Revolving Credit Facility | Mar. 24, 2011 Secured Debt [Member] Revolving Credit Facility | Mar. 25, 2011 Secured Debt [Member] Darling International Senior Secured Swingline Sub Facility [Member] | Dec. 17, 2010 Secured Debt [Member] Term Loan [Member] | Jun. 29, 2013 Secured Debt [Member] Term Loan [Member] | Dec. 29, 2012 Secured Debt [Member] Term Loan [Member] | Jun. 29, 2013 Unsecured Debt [Member] Darling International Senior Unsecured Notes [Member] | Dec. 29, 2012 Unsecured Debt [Member] Darling International Senior Unsecured Notes [Member] | Dec. 17, 2010 Unsecured Debt [Member] Darling International Senior Unsecured Notes [Member] | Jun. 29, 2013 Letter of Credit [Member] Darling International Senior Secured Letter of Credit Sub Facility [Member] | Dec. 29, 2012 Letter of Credit [Member] Darling International Senior Secured Letter of Credit Sub Facility [Member] | Mar. 25, 2011 Letter of Credit [Member] Darling International Senior Secured Letter of Credit Sub Facility [Member] | Jun. 29, 2013 Minimum [Member] Unsecured Debt [Member] Darling International Senior Unsecured Notes [Member] | Jun. 29, 2013 Maximum [Member] Unsecured Debt [Member] Darling International Senior Unsecured Notes [Member] | Jun. 29, 2013 Alternate Base Rate [Member] Term Loan [Member] | Jun. 29, 2013 Alternate Base Rate [Member] Minimum [Member] | Jun. 29, 2013 Alternate Base Rate [Member] Maximum [Member] | Jun. 29, 2013 LIBOR Rate [Member] | Jun. 29, 2013 LIBOR Rate [Member] Term Loan [Member]
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Term |  |  | 5 years |  |  |  |  |  | 6 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility Maximum Borrowing Capacity |  |  |  | $ 415,000,000 | $ 415,000,000 | $ 415,000,000 | $ 325,000,000 | $ 15,000,000 |  |  |  |  |  |  |  |  | $ 75,000,000 |  |  |  |  |  |  |
Company availability under revolving loan facility |  |  |  | 382,183,000 | 384,881,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding borrowings and letter of credit issued |  |  |  | 0 | 0 |  |  |  |  |  |  |  |  |  | 32,817,000 | 30,119,000 |  |  |  |  |  |  |  |
Original amount of term loan |  |  |  |  |  |  |  |  | 300,000,000 | 0 | 0 | 250,000,000 | 250,000,000 |  |  |  |  |  |  |  |  |  |  |
Amount repaid of the original term loan issued | 40,000 | 30,005,000 |  |  |  |  |  |  |  | 30,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Write-off of a portion of the senior term loan facilities deferred loan costs |  |  |  | 700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Additional Interest Rate Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.50% | 0.50% | 1.00% | 1.00% | 3.50%
Debt Instrument, Interest Rate, Effective Percentage Rate Range, Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.50% |  |  |  | 1.50%
Face amount of debt insturment |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 250,000,000 |  |  |  |  |  |  |  |  |  |
Annual Interest rate on 8.5% Senior Notes due 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  | 8.50% |  |  |  |  |  |  |  |  |  |
Debt Instrument, Percentage of Original Principal Amount Eligible For Redemption |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 35.00% |  |  |  |  |
Debt Instrument, Redemption Price Before December 15 2013 |  |  |  |  |  |  |  |  |  |  |  | 108.50% |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption, Percentage of Principal Amount That Remains Outstanding After Redemption |  |  |  |  |  |  |  |  |  |  |  | 65.00% |  |  |  |  |  |  |  |  |  |  |  |
Default event, percent of principal held in order to declare notes due and payable immediately |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 25.00% |  |  |  |  |  |
Pledge of stock | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pledge of Capital stock | 65.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Notice Period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 30 days | 60 days |  |  |  |  |
Debt Instrument, Redemption Period |  |  |  |  |  |  |  |  |  |  |  | 90 days |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount borrowed under the credit facility as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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