CONSOLIDATED BALANCE SHEETS (PARENTHETICALS) (USD $)	Dec. 31, 2011	Dec. 31, 2010
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	3,000,000	3,000,000
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	38,682,771	38,745,542
Common stock, shares outstanding	38,682,771	38,745,542