Consolidated Balance Sheets (Parenthetical) (USD $)
Mar. 31, 2013
Dec. 31, 2012
Series A Preferred Stock, shares issued 1 1
Series A Preferred Stock, shares outstanding 1 1
Class A Common Stock [Member]
   
Common Stock, par value (in dollars per share) 0.01 0.01
Common Stock, shares authorized 350,000,000 350,000,000
Common Stock, shares issued 41,399,124 41,220,689
Common Stock, shares outstanding 41,339,724 41,161,289
Treasury stock, shares 59,400 59,400
Class B Common Stock [Member]
   
Common Stock, par value (in dollars per share) 0.01 0.01
Common Stock, shares authorized 150,000,000 150,000,000
Common Stock, shares issued 25,984,625 25,984,625
Common Stock, shares outstanding 25,984,625 25,984,625