Condensed Consolidated Balance Sheets (Parenthetical) (Unaudited) (USD $)	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011
Condensed Consolidated Balance Sheets [Abstract]
Preferred stock, par value	$ 0.01	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000	5,000,000
Common stock, par value	$ 0.01	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000	50,000,000
Common stock, shares issued	24,913,095	23,980,177	23,648,177