Annual report pursuant to Section 13 and 15(d)

Equity Investments (Summary Of Financial Information) (Details)

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Equity Investments (Summary Of Financial Information) (Details) (Grizzly Oil Sands ULC [Member], USD $)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Grizzly Oil Sands ULC [Member]
     
Schedule of Equity Method Investments [Line Items]      
Current assets $ 21,247,000 $ 3,277,000 $ 2,064,000
Noncurrent assets 284,361,000 188,786,000 164,043,000
Current liabilities 25,984,000 3,708,000 1,585,000
Noncurrent liabilities 1,780,000 81,089,000 64,365,000
Gross revenue         
Loss from continuing operations 6,605,000 3,234,000 1,992,000
Net loss $ 6,605,000 $ 3,234,000 $ 1,991,000