Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Common stock par value (in Dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	98,883,253	98,030,839
Treasury stock, shares	14,781,353	10,832,845