Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Consolidated Balance Sheets
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized shares	500,000,000	500,000,000
Common stock, issued shares	39,100,899	31,488,204
Common stock, outstanding shares	39,100,899	31,488,204