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Hedging - Deferred Net Gains (Losses) in AOCI Expected to Be Reclassed into Income (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Derivative [Line Items]  
2015 $ 7,299cqb_DerivativeInstrumentsGainLossReclassificationfromAccumulatedOCItoIncomeEstimatedNetAmounttobeTransferredYearOne
Currency Hedge Portfolio | Cash flow hedging  
Derivative [Line Items]  
2015 23,211cqb_DerivativeInstrumentsGainLossReclassificationfromAccumulatedOCItoIncomeEstimatedNetAmounttobeTransferredYearOne
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeContractMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
Bunker Fuel Forward Contracts | Cash flow hedging  
Derivative [Line Items]  
2015 $ (15,912)cqb_DerivativeInstrumentsGainLossReclassificationfromAccumulatedOCItoIncomeEstimatedNetAmounttobeTransferredYearOne
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CommodityContractMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember