Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2011	Dec. 31, 2010
Condensed Consolidated Balance Sheets
Preferred shares, Authorized	50,000,000	50,000,000
Preferred shares, issued	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, Authorized shares	200,000,000	200,000,000
Common stock, issued shares	21,629,463	21,408,171
Common stock, outstanding shares	21,629,463	21,408,171