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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
Jun. 30, 2014
Dec. 31, 2013
Preferred stock, par value $ 0.01 $ 0.01
Preferred stock, shares authorized 250,000.00 250,000.00
Preferred stock, shares issued 0 0
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 200,000,000.0 200,000,000.0
Common stock, shares issued 162,800,000 162,800,000
Treasury stock, shares 21,000,000 20,500,000