Consolidated Balance Sheet Parenthetical (USD $)	Dec. 31, 2011	Dec. 31, 2010
Stockholders' Equity:
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, Authorized shares	100,000,000	100,000,000
Preferred stock, Issued Shares	0	0
Preferred stock, outstanding Shares	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Authorized shares	400,000,000	400,000,000
Common Stock, Issued Shares	34,613,607	34,065,856
Common Stock, outstanding Shares	34,613,607	34,065,856