Significant Accounting Policies (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended	8 Months Ended
	Jun. 30, 2011	Jun. 30, 2011	Aug. 31, 2011
Notes (Details)
Impairments of oil and gas properties held for sale in aggregate during the period	$ 9.2
Aggregate amount of reserves sold during the period as a percentage of year-end reserves		9200.00%	9500.00%