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Stockholders' Equity and Stock-Based Compensation Nonemployee Director Restricted Stock and Restricted Stock Unit Awards (Details) $ in Thousands | Jan. 02, 2016 USD ($)
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Director Restricted Stock Plan [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Stock available for grant per employee | $ 135

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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Stock Available for Grant per each employee. + References No definition available. + Details
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Namespace Prefix: | dar_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_AwardTypeAxis=dar_DirectorRestrictedStockPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |