Derivative Instruments (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Unrealized Loss Recognized in Other Income Expense	$ (437)

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

No definition available.

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