CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Jun. 30, 2014	Dec. 31, 2013
CONSOLIDATED BALANCE SHEETS
Preferred stock, Par value per share	$ 1.00	$ 1.00
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 per share	$ 0.01	$ 0.01
Common stock, shares authorized	140,000,000	140,000,000
Common stock, shares issued and outstanding	82,396,835	80,935,089
Treasury stock, shares	25,877,192	24,595,756