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Employee Benefit Plans Employee Benefit Plans Narrative 3 (Details) (USD $) | 12 Months Ended |
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Jan. 03, 2015 plan | Dec. 28, 2013 | Dec. 29, 2012 | Jan. 03, 2009
Employee Benefit Plans [Abstract] |  |  |  |
Number of Multiemployer Plans, Certified Red Zone | 4 dar_NumberOfMultiemployerPlansCertifiedRedZone |  |  |
Number Of Multiemployer Plans, Withdrawal Obligation Could Be Material | 2 dar_NumberOfMultiemployerPlansWithdrawalObligationCouldBeMaterial |  |  |
Number of Multiemployer Plans, Certified Yellow Zone | 2 dar_NumberOfMultiemployerPlansCertifiedYellowZone |  |  |
Number of Multiemployer Plans, Certified Orange Zone | 1 dar_NumberOfMultiemployerPlansCertifiedOrangeZone |  |  |
Contributions | $ 3,302,000 us-gaap_MultiemployerPlanPeriodContributions | $ 3,149,000 us-gaap_MultiemployerPlanPeriodContributions | $ 3,200,000 us-gaap_MultiemployerPlanPeriodContributions |
Multiemployer Plan, Withdrawal Obligation | $ 800,000 us-gaap_MultiemployerPlansWithdrawalObligation | $ 1,200,000 us-gaap_MultiemployerPlansWithdrawalObligation |  | $ 3,200,000 us-gaap_MultiemployerPlansWithdrawalObligation

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- Details
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- Definition Amount of contributions made to multiemployer plans by the employer. A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=35742057&loc=SL14450702-114947 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=35742057&loc=SL14450691-114947 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=35742057&loc=SL14450657-114947 + Details
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- Definition Amount of the obligation recognized by withdrawing from a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References No definition available. + Details
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