CONSOLIDATED CONDENSED BALANCE SHEETS (Parenthetical) - $ / shares	Jun. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Preferred stock,par value	$ 0.01	$ 0.01
Preferred stock,shares authorized	10,000,000	10,000,000
Preferred stock,shares issued	0	0
Preferred stock,shares outstanding	0	0
Common stock,par value	$ 0.01	$ 0.01
Common stock,shares authorized	250,000,000	250,000,000
Common stock,shares issued	137,093,424	137,093,424
Treasury stock,shares	45,297,032	39,342,387