Consolidated Balance Sheets (Parentheticals) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Statement of Financial Position [Abstract]
Common stock, par value per share	$ 0.01	$ 0.01
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	25,299,315	25,362,946
Common stock, shares outstanding	19,040,890	19,197,899
Treasury stock, shares outstanding	6,258,425	6,165,047