Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
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	24,324,025	23,920,195	24,909,345