v2.4.0.6
Common Stock (Details) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Common Stock Disclosure [Line Items]      
Options exercised 95,000    
Realized value, options exercised $ 136,000    
Cash received for options exercised 308,000   248,000
Deemed distribution     877,000
Incremental Shares Issued [Member]
      
Common Stock Disclosure [Line Items]      
Options exercised 41,000    
Realized value, options exercised 103,000    
In the money shares exercise of options, net 15,822    
Exercise price per share $ 4.01    
Market price per share $ 6.53    
Class A [Member]
      
Common Stock Disclosure [Line Items]      
Common stock, shares issued 31,951,945 31,675,518  
Common stock, value 223,000 220,000  
Options exercised 136,000   90,000
Exercise price per share     $ 2.76
Shares repurchased   172,300 62,375
Value of shares repurchased   747,000 251,000
Common stock, shares canceled     4,348,780
Class A [Member] | Executive Officer [Member]
      
Common Stock Disclosure [Line Items]      
Common stock, shares issued 155,925 174,825 148,616
Class A [Member] | Employee Stock [Member]
      
Common Stock Disclosure [Line Items]      
Common stock, shares issued 9,680    
Common stock, value $ 44,000