Fair Value Measurements - Fair Value Reconciliation Liabilities Using Significant Unobservable Inputs (3 month) (Level 3) (Details) (National Cooperative Refinery Association [Member], Crack Spread Contingent Payment [Member], USD $) In Thousands, unless otherwise specified
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3 Months Ended |
6 Months Ended |
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Feb. 28, 2015
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Feb. 28, 2014
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Feb. 28, 2015
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Feb. 28, 2014
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Nov. 30, 2014
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Aug. 31, 2014
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Nov. 30, 2013
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Aug. 31, 2013
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Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
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Balance |
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$ 86,520us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue |
$ 114,917us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue |
$ 150,991us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue |
$ 134,134us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue |
Balance |
121,070us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue |
140,631us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue |
121,070us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue |
140,631us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue |
86,520us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue |
114,917us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue |
150,991us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue |
134,134us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue |
Cost of Goods, Total
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Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
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Total gains or losses included in cost of goods sold and net interest |
$ 34,550us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings / us-gaap_BusinessAcquisitionAxis = chscp_NationalCooperativeRefineryAssociationMember / us-gaap_ContingentConsiderationByTypeAxis = chscp_CrackSpreadContingentPaymentMember / us-gaap_IncomeStatementLocationAxis = us-gaap_CostOfGoodsTotalMember |
$ (10,360)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings / us-gaap_BusinessAcquisitionAxis = chscp_NationalCooperativeRefineryAssociationMember / us-gaap_ContingentConsiderationByTypeAxis = chscp_CrackSpreadContingentPaymentMember / us-gaap_IncomeStatementLocationAxis = us-gaap_CostOfGoodsTotalMember |
$ 6,153us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings / us-gaap_BusinessAcquisitionAxis = chscp_NationalCooperativeRefineryAssociationMember / us-gaap_ContingentConsiderationByTypeAxis = chscp_CrackSpreadContingentPaymentMember / us-gaap_IncomeStatementLocationAxis = us-gaap_CostOfGoodsTotalMember |
$ 6,497us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings / us-gaap_BusinessAcquisitionAxis = chscp_NationalCooperativeRefineryAssociationMember / us-gaap_ContingentConsiderationByTypeAxis = chscp_CrackSpreadContingentPaymentMember / us-gaap_IncomeStatementLocationAxis = us-gaap_CostOfGoodsTotalMember |
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