Derivative Activities (Narrative) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
Jun. 30, 2012
Derivative Activities [Abstract]
Deferred premiums associated with natural gas derivative instruments	$ 4.8

Deferred premiums associated with natural gas derivative instruments.

No definition available.

Name:	qre_DeferredPremiumsAssociatedWithNaturalGasDerivativeInstruments
Namespace Prefix:	qre_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration