Quarterly report pursuant to Section 13 or 15(d)

Consolidated Balance Sheets (parenthetical)

v2.4.0.6
Consolidated Balance Sheets (parenthetical) (USD $)
Jun. 30, 2012
Dec. 31, 2011
Preferred stock, par value (in usd per share) $ 0.0001 $ 0.0001
Preferred stock, shares authorized 5,000,000 5,000,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Treasury stock at cost 4,833,284 4,833,284
Class A Common Stock
   
Common stock, par value (in usd per share) $ 0.0001 $ 0.0001
Common stock, shares authorized 500,000,000 500,000,000
Common stock, shares issued 31,469,300 30,713,837
Common stock, shares outstanding 26,636,016 25,880,553
Class B Common Stock
   
Common stock, par value (in usd per share) $ 0.0001 $ 0.0001
Common stock, shares authorized 144,000,000 144,000,000
Common stock, shares issued 18,000,000 18,000,000
Common stock, shares outstanding 18,000,000 18,000,000