Accrued Expenses (Details) (USD $) In Thousands, unless otherwise specified	Jan. 03, 2015	Dec. 28, 2013
ACCRUED EXPENSES [Abstract]
Compensation and benefits	$ 92,863	$ 38,902
Utilities and sewage	18,441us-gaap_AccruedUtilitiesCurrent	6,802us-gaap_AccruedUtilitiesCurrent
Accrued income, ad valorem, and franchise taxes	15,615us-gaap_TaxesPayableCurrent	3,651us-gaap_TaxesPayableCurrent
Reserve for self insurance, litigation, environmental and tax matters (Note 19)	10,041	7,878
Medical claims liability	5,229	5,960
Accrued Operating Expenses	55,877dar_AccruedOperatingExpenses	9,512dar_AccruedOperatingExpenses
Accrued Acquisition Costs	0dar_AccruedAcquisitionCosts	4,306dar_AccruedAcquisitionCosts
Accrued financing fee	0dar_AccruedFinancingFees	18,592dar_AccruedFinancingFees
Interest Payable, Current	13,869us-gaap_InterestPayableCurrent	0us-gaap_InterestPayableCurrent
Other accrued expense	44,184us-gaap_OtherAccruedLiabilitiesCurrent	17,571us-gaap_OtherAccruedLiabilitiesCurrent
Accrued expenses	$ 256,119us-gaap_AccruedLiabilitiesCurrent	$ 113,174us-gaap_AccruedLiabilitiesCurrent

Accrued Acquisition Costs

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Accrued Financing Fees

+ References

No definition available.

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- Definition

Accrued Operating Expenses

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No definition available.

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- Definition

Reserve For Self Insurance, Litigation, Environmental And Tax Matters, Current

+ References

No definition available.

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Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for utilities, such as electrical power, heating oil, natural gas, and water. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20

-Article 5

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-Publisher FASB

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-Glossary Current Liabilities

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Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20

-Article 5

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The amount needed to reflect the estimated ultimate cost of settling claims relating to insured events that have occurred on or before the balance sheet date, whether or not reported to the insurer at that date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 40

-Section 50

-Paragraph 3

-Subparagraph (a),(b),(c)

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Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

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Carrying value as of the balance sheet date of obligations incurred and payable for statutory income, sales, use, payroll, excise, real, property and other taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

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-Name Regulation S-X (SX)

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-Section 02

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