CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Dec. 31, 2011	Dec. 31, 2010
CONSOLIDATED BALANCE SHEETS (Parenthetical) [Abstract]
Capital stock, per value (in dollars per share)	$ 0.0001	$ 0.0001
Capital stock, shares authorized (in shares)	500,000,000	500,000,000
Capital stock, shares issued (in shares)	443,977,432	442,403,636
Capital stock, shares outstanding (in shares)	443,977,432	442,403,636