Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical)

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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - $ / shares
Sep. 30, 2019
Dec. 31, 2018
Convertible preferred stock issued 0 0
Class A Common Stock    
Common stock, par value (usd per share) $ 0.01 $ 0.01
Common stock, shares authorized 100,000,000 100,000,000
Common stock, shares issued 64,733,667 64,197,385
Common stock, shares outstanding 31,105,000 30,721,226
Treasury stock, shares 33,628,667 33,476,159
Class B common stock    
Common stock, par value (usd per share) $ 0.01 $ 0.01
Common stock, shares authorized 30,000,000 30,000,000
Common stock, shares issued 12,029,375 12,029,375
Common stock, shares outstanding 12,029,375 12,029,375