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Ceiling Test (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Line Items]    
Rate for discounting future cash flows 10.00%pq_RateForDiscountingFutureCashFlows  
Increase in ceiling test write-downs $ 108,911us-gaap_UnamortizedCostsCapitalizedLessRelatedDeferredIncomeTaxesExceedCeilingLimitationExpense $ 0us-gaap_UnamortizedCostsCapitalizedLessRelatedDeferredIncomeTaxesExceedCeilingLimitationExpense
Mcf of natural gas    
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Line Items]    
Average sales prices 3.31us-gaap_AverageSalesPrices
/ us-gaap_ReserveQuantitiesByTypeOfReserveAxis
= us-gaap_NaturalGasPerThousandCubicFeetMember		  
Barrel of oil    
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Line Items]    
Average sales prices 81.33us-gaap_AverageSalesPrices
/ us-gaap_ReserveQuantitiesByTypeOfReserveAxis
= us-gaap_OilReservesMember		  
Mcfe of Ngl    
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Line Items]    
Average sales prices 3.52us-gaap_AverageSalesPrices
/ us-gaap_ReserveQuantitiesByTypeOfReserveAxis
= us-gaap_NaturalGasLiquidsReservesMember		  
Commodity Derivatives | Cash Flow Hedging    
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Line Items]    
Increase in ceiling test write-downs $ 14,000us-gaap_UnamortizedCostsCapitalizedLessRelatedDeferredIncomeTaxesExceedCeilingLimitationExpense
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CommodityContractMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember