CONDENSED CONSOLIDATED BALANCE SHEETS (PARENTHETICAL) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Common Stock, Par Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	400,000,000	400,000,000
Common Stock, Shares, Issued	113,279,325	112,488,604
Common Stock, Shares, Outstanding	113,279,325	112,488,604