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Derivatives (Forward Contracts Not Designated as Hedging Instruments) (Details) (Forward Contracts [Member], Not Designated as Hedging Instrument [Member]) In Thousands, unless otherwise specified | Apr. 04, 2015 Short [Member] BRI/EUR 1 [Member] BRL | Apr. 04, 2015 Short [Member] BRI/EUR 2 [Member] BRL | Apr. 04, 2015 Short [Member] EUR/USD [Member] EUR (€) | Apr. 04, 2015 Short [Member] EUR/PLN [Member] EUR (€) | Apr. 04, 2015 Short [Member] EUR/JPN [Member] EUR (€) | Apr. 04, 2015 Short [Member] EUR/CNY [Member] EUR (€) | Apr. 04, 2015 Short [Member] EUR/AUD [Member] EUR (€) | Apr. 04, 2015 Short [Member] EUR/GBP [Member] EUR (€) | Apr. 04, 2015 Short [Member] EUR/GBP [Member] GBP (£) | Apr. 04, 2015 Short [Member] PLN/EUR [Member] PLN | Apr. 04, 2015 Short [Member] GBP/USD [Member] GBP (£) | Apr. 04, 2015 Long [Member] BRI/EUR 1 [Member] EUR (€) | Apr. 04, 2015 Long [Member] BRI/EUR 2 [Member] USD ($) | Apr. 04, 2015 Long [Member] EUR/USD [Member] USD ($) | Apr. 04, 2015 Long [Member] EUR/PLN [Member] PLN | Apr. 04, 2015 Long [Member] EUR/JPN [Member] JPY (¥) | Apr. 04, 2015 Long [Member] EUR/CNY [Member] CNY | Apr. 04, 2015 Long [Member] EUR/AUD [Member] AUD | Apr. 04, 2015 Long [Member] EUR/GBP [Member] EUR (€) | Apr. 04, 2015 Long [Member] EUR/GBP [Member] GBP (£) | Apr. 04, 2015 Long [Member] PLN/EUR [Member] EUR (€) | Apr. 04, 2015 Long [Member] GBP/USD [Member] USD ($)
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Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative notional amount | 16,355 invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_ForwardContractsMember / us-gaap_DerivativeInstrumentRiskAxis = dar_BRIEUR1Member / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_ShortMember | 36,824 invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_ForwardContractsMember / us-gaap_DerivativeInstrumentRiskAxis = dar_BRIEUR2Member / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_ShortMember | € 263,454 invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_ForwardContractsMember / us-gaap_DerivativeInstrumentRiskAxis = dar_EURUSDMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_ShortMember | € 21,885 invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_ForwardContractsMember / us-gaap_DerivativeInstrumentRiskAxis = dar_EURPLNMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_ShortMember | € 5,505 invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_ForwardContractsMember / us-gaap_DerivativeInstrumentRiskAxis = dar_EURJPNMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_ShortMember | € 35,028 invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_ForwardContractsMember / us-gaap_DerivativeInstrumentRiskAxis = dar_EURCNYMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_ShortMember | € 25,145 invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_ForwardContractsMember / us-gaap_DerivativeInstrumentRiskAxis = dar_EURAUDMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_ShortMember | € 3,364 invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_ForwardContractsMember / us-gaap_DerivativeInstrumentRiskAxis = dar_EURGBPMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_ShortMember | £ 109 invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_ForwardContractsMember / us-gaap_DerivativeInstrumentRiskAxis = dar_EURGBPMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_ShortMember | 21,095 invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_ForwardContractsMember / us-gaap_DerivativeInstrumentRiskAxis = dar_PLNEURMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_ShortMember | £ 116 invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_ForwardContractsMember / us-gaap_DerivativeInstrumentRiskAxis = dar_GBPUSDMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_ShortMember | € 4,800 invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_ForwardContractsMember / us-gaap_DerivativeInstrumentRiskAxis = dar_BRIEUR1Member / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_LongMember | $ 12,250 invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_ForwardContractsMember / us-gaap_DerivativeInstrumentRiskAxis = dar_BRIEUR2Member / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_LongMember | $ 299,964 invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_ForwardContractsMember / us-gaap_DerivativeInstrumentRiskAxis = dar_EURUSDMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_LongMember | 90,000 invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_ForwardContractsMember / us-gaap_DerivativeInstrumentRiskAxis = dar_EURPLNMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_LongMember | ¥ 727,609 invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_ForwardContractsMember / us-gaap_DerivativeInstrumentRiskAxis = dar_EURJPNMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_LongMember | 238,577 invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_ForwardContractsMember / us-gaap_DerivativeInstrumentRiskAxis = dar_EURCNYMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_LongMember | 35,850 invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_ForwardContractsMember / us-gaap_DerivativeInstrumentRiskAxis = dar_EURAUDMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_LongMember | € 150 invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_ForwardContractsMember / us-gaap_DerivativeInstrumentRiskAxis = dar_EURGBPMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_LongMember | £ 2,443 invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_ForwardContractsMember / us-gaap_DerivativeInstrumentRiskAxis = dar_EURGBPMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_LongMember | € 5,064 invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_ForwardContractsMember / us-gaap_DerivativeInstrumentRiskAxis = dar_PLNEURMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_LongMember | $ 177 invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_ForwardContractsMember / us-gaap_DerivativeInstrumentRiskAxis = dar_GBPUSDMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_LongMember

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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Namespace Prefix: | invest_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration