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Derivative Instruments (Details Textual) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Dec. 31, 2013
Derivatives, Fair Value [Line Items]        
Realization of gain, net of taxes $ 6,900,000us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths      
Accumulated other comprehensive income 7,018,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax (4,514,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax 5,420,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax (1,096,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
Gas hedges        
Derivatives, Fair Value [Line Items]        
Gain or loss recognized in oil and gas contracts 2,324,000us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_ReserveQuantitiesByTypeOfReserveAxis
= pq_CommodityGasHedgesMember
(2,969,000)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_ReserveQuantitiesByTypeOfReserveAxis
= pq_CommodityGasHedgesMember
   
Mcfe of Ngl        
Derivatives, Fair Value [Line Items]        
Gain or loss recognized in oil and gas contracts 21,000us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_ReserveQuantitiesByTypeOfReserveAxis
= us-gaap_NaturalGasLiquidsReservesMember
0us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_ReserveQuantitiesByTypeOfReserveAxis
= us-gaap_NaturalGasLiquidsReservesMember
   
Crude Oil        
Derivatives, Fair Value [Line Items]        
Gain or loss recognized in oil and gas contracts $ 27,000us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_ReserveQuantitiesByTypeOfReserveAxis
= pq_CommodityOilHedgesMember
$ (434,000)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_ReserveQuantitiesByTypeOfReserveAxis
= pq_CommodityOilHedgesMember