Derivative Activities (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2013
Derivative Activities [Abstract]
Deferred premiums associated with natural gas derivative instruments	$ 4.9

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