根据第13和15(d)条提交的年度报告

Subsequent Events (Details)

v2.4.0.6
Subsequent Events (Details) (USD $)
除非另有说明，单位为百万
 0 Months Ended 1 Months Ended 2 Months Ended 4 Months Ended 5 Months Ended 10 Months Ended 12 Months Ended
Feb. 13, 2012
Jan. 31, 2012
Feb. 28, 2010
Dec. 31, 2009
Aug. 31, 2009
Dec. 31, 2010
Dec. 31, 2011
Subsequent Event [Line Items]              
Company's purchase price agreement   $ 56.3          
Production barrels per day 1,000   3,000 3,000 3,000 2,300 2,000
Weighted average price (Bbls) 113.20           108.00
Grizzly Oil Sands ULC [Member]
              
Subsequent Event [Line Items]              
约英亩油砂租赁协议   46,700          
Affiliate purchase price agreement   $ 225.0