Consolidated Balance Sheets (Parentheticals) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	25,284,475	25,299,315
Common stock, shares outstanding	19,155,078	19,040,890
Treasury stock, shares	6,129,397	6,258,425