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Derivatives (Details) | 3 Months Ended | 12 Months Ended |  |  |  |  | 12 Months Ended |  |  | 12 Months Ended |  |  |  |  | 3 Months Ended |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 Months Ended |
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Jan. 03, 2015 USD ($) | Sep. 27, 2014 USD ($) | Jun. 28, 2014 USD ($) | Mar. 29, 2014 USD ($) | Dec. 28, 2013 USD ($) | Jan. 03, 2015 USD ($) month | Dec. 28, 2013 USD ($) | Dec. 29, 2012 USD ($) | Jan. 03, 2015 Designated as Hedging Instrument [Member] USD ($) | Dec. 28, 2013 Designated as Hedging Instrument [Member] USD ($) | Jan. 03, 2015 Not Designated as Hedging Instrument [Member] USD ($) | Dec. 28, 2013 Not Designated as Hedging Instrument [Member] USD ($) | Jan. 03, 2015 Natural Gas Swap [Member] USD ($) | Dec. 28, 2013 Natural Gas Swap [Member] USD ($) | Dec. 29, 2012 Natural Gas Swap [Member] USD ($) | Jan. 03, 2015 Natural Gas Swap [Member] Designated as Hedging Instrument [Member] Other Current Assets [Member] USD ($) | Dec. 28, 2013 Natural Gas Swap [Member] Designated as Hedging Instrument [Member] Other Current Assets [Member] USD ($) | Jan. 03, 2015 Corn Option [Member] USD ($) | Dec. 28, 2013 Corn Option [Member] USD ($) | Dec. 29, 2012 Corn Option [Member] USD ($) | Jan. 03, 2015 Corn Option [Member] Designated as Hedging Instrument [Member] Accrued Expenses [Member] USD ($) | Dec. 28, 2013 Corn Option [Member] Designated as Hedging Instrument [Member] Accrued Expenses [Member] USD ($) | Jan. 03, 2015 Corn Option [Member] Designated as Hedging Instrument [Member] Other Current Assets [Member] USD ($) | Dec. 28, 2013 Corn Option [Member] Designated as Hedging Instrument [Member] Other Current Assets [Member] USD ($) | Mar. 29, 2014 Foreign Exchange Contract [Member] Not Designated as Hedging Instrument [Member] Vion Ingredients [Member] USD ($) | Dec. 28, 2013 Foreign Exchange Contract [Member] Not Designated as Hedging Instrument [Member] Vion Ingredients [Member] USD ($) | Nov. 30, 2013 Foreign Exchange Contract [Member] Not Designated as Hedging Instrument [Member] Vion Ingredients [Member] EUR (€) | Jan. 03, 2015 Foreign Exchange Contract [Member] Not Designated as Hedging Instrument [Member] Accrued Expenses [Member] USD ($) | Dec. 28, 2013 Foreign Exchange Contract [Member] Not Designated as Hedging Instrument [Member] Accrued Expenses [Member] USD ($) | Jan. 03, 2015 Foreign Exchange Contract [Member] Not Designated as Hedging Instrument [Member] Other Current Assets [Member] USD ($) | Dec. 28, 2013 Foreign Exchange Contract [Member] Not Designated as Hedging Instrument [Member] Other Current Assets [Member] USD ($) | Jan. 03, 2015 Corn options and futures [Member] Not Designated as Hedging Instrument [Member] Accrued Expenses [Member] USD ($) | Dec. 28, 2013 Corn options and futures [Member] Not Designated as Hedging Instrument [Member] Accrued Expenses [Member] USD ($) | Jan. 03, 2015 Corn options and futures [Member] Not Designated as Hedging Instrument [Member] Other Current Assets [Member] USD ($) | Dec. 28, 2013 Corn options and futures [Member] Not Designated as Hedging Instrument [Member] Other Current Assets [Member] USD ($) | Jan. 03, 2015 Heating Oil Swaps And Options [Member] Not Designated as Hedging Instrument [Member] Accrued Expenses [Member] USD ($) | Dec. 28, 2013 Heating Oil Swaps And Options [Member] Not Designated as Hedging Instrument [Member] Accrued Expenses [Member] USD ($) | Jan. 03, 2015 Heating Oil Swaps And Options [Member] Not Designated as Hedging Instrument [Member] Other Current Assets [Member] USD ($) | Dec. 28, 2013 Heating Oil Swaps And Options [Member] Not Designated as Hedging Instrument [Member] Other Current Assets [Member] USD ($) | Jan. 03, 2015 Forward Contracts [Member] Commodity Contract [Member] USD ($) | Jan. 03, 2015 Cash Flow Hedging [Member] USD ($) | Jan. 03, 2015 Cash Flow Hedging [Member] Natural Gas Swap [Member] USD ($) | Dec. 28, 2013 Cash Flow Hedging [Member] Natural Gas Swap [Member] USD ($) | Jan. 03, 2015 Cash Flow Hedging [Member] Corn Option [Member] USD ($) | Dec. 28, 2013 Cash Flow Hedging [Member] Corn Option [Member] USD ($) | Jan. 03, 2015 Short [Member] Forward Contracts [Member] BRI/EUR 1 [Member] Not Designated as Hedging Instrument [Member] BRL | Jan. 03, 2015 Short [Member] Forward Contracts [Member] BRI/EUR 2 [Member] Not Designated as Hedging Instrument [Member] BRL | Jan. 03, 2015 Short [Member] Forward Contracts [Member] EUR/USD [Member] Not Designated as Hedging Instrument [Member] EUR (€) | Jan. 03, 2015 Short [Member] Forward Contracts [Member] EUR/PLN [Member] Not Designated as Hedging Instrument [Member] EUR (€) | Jan. 03, 2015 Short [Member] Forward Contracts [Member] EUR/JPN [Member] Not Designated as Hedging Instrument [Member] EUR (€) | Jan. 03, 2015 Short [Member] Forward Contracts [Member] EUR/CNY [Member] Not Designated as Hedging Instrument [Member] EUR (€) | Jan. 03, 2015 Short [Member] Forward Contracts [Member] EUR/AUD [Member] Not Designated as Hedging Instrument [Member] EUR (€) | Jan. 03, 2015 Short [Member] Forward Contracts [Member] EUR/GBP [Member] Not Designated as Hedging Instrument [Member] EUR (€) | Jan. 03, 2015 Short [Member] Forward Contracts [Member] PLN/EUR [Member] Not Designated as Hedging Instrument [Member] PLN | Jan. 03, 2015 Long [Member] Forward Contracts [Member] BRI/EUR 1 [Member] Not Designated as Hedging Instrument [Member] EUR (€) | Jan. 03, 2015 Long [Member] Forward Contracts [Member] BRI/EUR 2 [Member] Not Designated as Hedging Instrument [Member] USD ($) | Jan. 03, 2015 Long [Member] Forward Contracts [Member] EUR/USD [Member] Not Designated as Hedging Instrument [Member] USD ($) | Jan. 03, 2015 Long [Member] Forward Contracts [Member] EUR/PLN [Member] Not Designated as Hedging Instrument [Member] PLN | Jan. 03, 2015 Long [Member] Forward Contracts [Member] EUR/JPN [Member] Not Designated as Hedging Instrument [Member] JPY (¥) | Jan. 03, 2015 Long [Member] Forward Contracts [Member] EUR/CNY [Member] Not Designated as Hedging Instrument [Member] CNY | Jan. 03, 2015 Long [Member] Forward Contracts [Member] EUR/AUD [Member] Not Designated as Hedging Instrument [Member] AUD | Jan. 03, 2015 Long [Member] Forward Contracts [Member] EUR/GBP [Member] Not Designated as Hedging Instrument [Member] GBP (£) | Jan. 03, 2015 Long [Member] Forward Contracts [Member] PLN/EUR [Member] Not Designated as Hedging Instrument [Member] EUR (€)
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, Notional Amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 1,000,000,000 invest_DerivativeNotionalAmount / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 11,721,000 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 | 18,877,000 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 | € 289,385,000 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 | € 8,348,000 invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_ForwardContractsMember / us-gaap_DerivativeInstrumentRiskAxis = dar_EURPLNMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_ShortMember | € 3,429,000 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 | € 31,600,000 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 | € 21,146,000 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 | € 1,842,000 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 | 11,544,000 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 | € 3,650,000 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 | $ 7,400,000 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 | $ 359,631,000 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 | 35,000,000 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 | ¥ 488,926,000 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 | 242,054,000 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 | 31,350,000 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 | £ 1,448,000 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 | € 2,741,000 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
Derivative, Forward Exchange Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.346 us-gaap_DerivativeAverageForwardExchangeRate1 / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of months cash flow hedge gain (loss) reclassified over |  |  |  |  |  | 12 dar_NumberOfMonthsCashFlowHedgeGainLossReclassifiedOver |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount reclassified from accumulated other comprehensive loss into earnings over next 12 months |  |  |  |  |  | 100,000 us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest | 68,788,000 us-gaap_ProfitLoss | 15,954,000 us-gaap_ProfitLoss | 34,575,000 us-gaap_ProfitLoss | (51,006,000)us-gaap_ProfitLoss |  | 68,311,000 us-gaap_ProfitLoss | 108,967,000 us-gaap_ProfitLoss | 130,770,000 us-gaap_ProfitLoss |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_ProfitLoss / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Derivatives Fair Value | 12,228,000 us-gaap_DerivativeFairValueOfDerivativeAsset |  |  |  | 30,028,000 us-gaap_DerivativeFairValueOfDerivativeAsset | 12,228,000 us-gaap_DerivativeFairValueOfDerivativeAsset | 30,028,000 us-gaap_DerivativeFairValueOfDerivativeAsset |  | 247,000 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember | 2,469,000 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember | 11,981,000 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember | 27,559,000 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember |  |  |  | 0 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentAssetsMember / us-gaap_DerivativeInstrumentRiskAxis = dar_NaturalGasSwapMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember | 120,000 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentAssetsMember / us-gaap_DerivativeInstrumentRiskAxis = dar_NaturalGasSwapMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember |  |  |  |  |  | 247,000 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentAssetsMember / us-gaap_DerivativeInstrumentRiskAxis = dar_CornOptionMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember | 2,349,000 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentAssetsMember / us-gaap_DerivativeInstrumentRiskAxis = dar_CornOptionMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember |  |  |  |  |  | 11,559,000 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentAssetsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember | 27,516,000 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentAssetsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember |  |  | 69,000 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentAssetsMember / us-gaap_DerivativeInstrumentRiskAxis = dar_CornOptionsAndFuturesMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember | 0 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentAssetsMember / us-gaap_DerivativeInstrumentRiskAxis = dar_CornOptionsAndFuturesMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember |  |  | 353,000 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentAssetsMember / us-gaap_DerivativeInstrumentRiskAxis = dar_HeatingOilSwapsAndOptionsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember | 43,000 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentAssetsMember / us-gaap_DerivativeInstrumentRiskAxis = dar_HeatingOilSwapsAndOptionsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign Currency Transaction Gain (Loss), Unrealized |  |  |  |  | 27,500,000 us-gaap_ForeignCurrencyTransactionGainLossUnrealized | 0 us-gaap_ForeignCurrencyTransactionGainLossUnrealized | 27,516,000 us-gaap_ForeignCurrencyTransactionGainLossUnrealized | 0 us-gaap_ForeignCurrencyTransactionGainLossUnrealized |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 27,500,000 us-gaap_ForeignCurrencyTransactionGainLossUnrealized / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency gains (losses) |  |  |  | 12,600,000 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax |  | (13,548,000)us-gaap_ForeignCurrencyTransactionGainLossBeforeTax | 28,107,000 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax | 0 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12,600,000 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Liability Derivatives Fair Value | 3,015,000 us-gaap_DerivativeFairValueOfDerivativeLiability |  |  |  | 3,000 us-gaap_DerivativeFairValueOfDerivativeLiability | 3,015,000 us-gaap_DerivativeFairValueOfDerivativeLiability | 3,000 us-gaap_DerivativeFairValueOfDerivativeLiability |  | 0 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember | 1,000 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember | 3,015,000 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember | 2,000 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember |  |  |  |  |  |  |  |  | 0 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_BalanceSheetLocationAxis = dar_AccruedExpensesMember / us-gaap_DerivativeInstrumentRiskAxis = dar_CornOptionMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember | 1,000 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_BalanceSheetLocationAxis = dar_AccruedExpensesMember / us-gaap_DerivativeInstrumentRiskAxis = dar_CornOptionMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember |  |  |  |  |  | 2,019,000 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_BalanceSheetLocationAxis = dar_AccruedExpensesMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember | 0 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_BalanceSheetLocationAxis = dar_AccruedExpensesMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember |  |  | 3,000 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_BalanceSheetLocationAxis = dar_AccruedExpensesMember / us-gaap_DerivativeInstrumentRiskAxis = dar_CornOptionsAndFuturesMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember | 0 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_BalanceSheetLocationAxis = dar_AccruedExpensesMember / us-gaap_DerivativeInstrumentRiskAxis = dar_CornOptionsAndFuturesMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember |  |  | 993,000 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_BalanceSheetLocationAxis = dar_AccruedExpensesMember / us-gaap_DerivativeInstrumentRiskAxis = dar_HeatingOilSwapsAndOptionsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember | 2,000 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_BalanceSheetLocationAxis = dar_AccruedExpensesMember / us-gaap_DerivativeInstrumentRiskAxis = dar_HeatingOilSwapsAndOptionsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net |  |  |  |  |  | 1,823,000 us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet | 7,598,000 us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 11,000 us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet / us-gaap_DerivativeInstrumentRiskAxis = dar_NaturalGasSwapMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember | 248,000 us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet / us-gaap_DerivativeInstrumentRiskAxis = dar_NaturalGasSwapMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember | 1,812,000 us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet / us-gaap_DerivativeInstrumentRiskAxis = dar_CornOptionMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember | 7,350,000 us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet / us-gaap_DerivativeInstrumentRiskAxis = dar_CornOptionMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net |  |  |  |  |  | 4,064,000 us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet | 5,527,000 us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 196,000 us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet / us-gaap_DerivativeInstrumentRiskAxis = dar_NaturalGasSwapMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember | 41,000 us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet / us-gaap_DerivativeInstrumentRiskAxis = dar_NaturalGasSwapMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember | 3,868,000 us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet / us-gaap_DerivativeInstrumentRiskAxis = dar_CornOptionMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember | 5,486,000 us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet / us-gaap_DerivativeInstrumentRiskAxis = dar_CornOptionMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative Instruments, Loss Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,000)us-gaap_DerivativeInstrumentsLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTesting / us-gaap_DerivativeInstrumentRiskAxis = dar_NaturalGasSwapMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember | (4,000)us-gaap_DerivativeInstrumentsLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTesting / us-gaap_DerivativeInstrumentRiskAxis = dar_NaturalGasSwapMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain Recognized in Income on Derivatives, Ineffective Portion and Amount Excluded from Effectiveness Testing |  |  |  |  |  | 91,000 us-gaap_DerivativeInstrumentsGainRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTesting | 270,000 us-gaap_DerivativeInstrumentsGainRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTesting |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 92,000 us-gaap_DerivativeInstrumentsGainRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTesting / us-gaap_DerivativeInstrumentRiskAxis = dar_CornOptionMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember | 274,000 us-gaap_DerivativeInstrumentsGainRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTesting / us-gaap_DerivativeInstrumentRiskAxis = dar_CornOptionMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain/(loss) recognized in other comprehensive income (loss) |  |  |  |  |  | 1,800,000 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax | 7,600,000 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax |  |  |  |  |  | 11,000 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax / us-gaap_DerivativeInstrumentRiskAxis = dar_NaturalGasSwapMember | 248,000 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax / us-gaap_DerivativeInstrumentRiskAxis = dar_NaturalGasSwapMember | (628,000)us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax / us-gaap_DerivativeInstrumentRiskAxis = dar_NaturalGasSwapMember |  |  | 1,812,000 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax / us-gaap_DerivativeInstrumentRiskAxis = dar_CornOptionMember | 7,350,000 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax / us-gaap_DerivativeInstrumentRiskAxis = dar_CornOptionMember | 317,000 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax / us-gaap_DerivativeInstrumentRiskAxis = dar_CornOptionMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax |  |  |  |  |  | 700,000 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax | 2,900,000 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax |  |  |  |  |  | 4,000 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax / us-gaap_DerivativeInstrumentRiskAxis = dar_NaturalGasSwapMember | 96,000 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax / us-gaap_DerivativeInstrumentRiskAxis = dar_NaturalGasSwapMember | (243,000)us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax / us-gaap_DerivativeInstrumentRiskAxis = dar_NaturalGasSwapMember |  |  | 704,000 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax / us-gaap_DerivativeInstrumentRiskAxis = dar_CornOptionMember | 2,852,000 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax / us-gaap_DerivativeInstrumentRiskAxis = dar_CornOptionMember | 123,000 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax / us-gaap_DerivativeInstrumentRiskAxis = dar_CornOptionMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Forward Purchase Amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4,200,000 dar_ForwardPurchaseAmount / us-gaap_DerivativeByNatureAxis = us-gaap_ForwardContractsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591552-111686 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591551-111686 + Details
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