Derivative Instruments (Details 4) (Not Designated as Hedging Instrument, USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012
Not Designated as Hedging Instrument
Effect of Non-designated Derivative Instruments on the Consolidated Statement of Operations
Amount of Gain (Loss) Recognized in Derivative Income (Expense)	$ 233	$ (233)

Amount of unrealized gain (loss) recognized in other income (expense).

No definition available.

Name:	pq_AmountofUnrealizedGainLossRecognizedinOtherIncomeExpense
Namespace Prefix:	pq_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration