v2.4.0.8
Equity And Stock-Based Compensation (Schedule Of Stock Options Outstanding And Exercisable) (Details) (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Mar. 31, 2014
Jun. 30, 2014
Jun. 30, 2013
Equity And Stock-Based Compensation [Line Items]        
Weighted Average Exercise Price of Options Outstanding, Granted     $ 7.40 $ 5.89
Class A [Member]
        
Equity And Stock-Based Compensation [Line Items]        
Common Stock Options Outstanding, Beginning balance 729,350 709,850 709,850  
Common Stock Options Outstanding, Granted   20,000 20,000 50,000
Common Stock Options Outstanding, Exercised (77,000) (500)    
Common Stock Options Outstanding, Ending balance 652,350 729,350 652,350  
Weighted Average Exercise Price of Options Outstanding, Beginning price $ 6.68 $ 6.24 $ 6.24  
Weighted Average Exercise Price of Options Outstanding, Granted   $ 7.40    
Weighted Average Exercise Price of Options Outstanding, Exercised $ 6.38 $ 6.23    
Weighted Average Exercise Price of Options Outstanding, Ending price $ 6.53 $ 6.68 $ 6.53  
Common Stock Exercisable Options, Outstanding Beginning balance 510,350 490,350 490,350  
Common Stock Exercisable Options, Outstanding Ending balance 435,350 510,350 435,350  
Weighted Average Price of Exercisable Options, Outstanding Beginning balance $ 6.87 $ 6.85 $ 6.85  
Weighted Average Price of Exercisable Options, Outstanding Ending balance $ 6.95 $ 6.87 $ 6.95  
Class B [Member]
        
Equity And Stock-Based Compensation [Line Items]        
Common Stock Options Outstanding, Beginning balance 185,100 185,100 185,100  
Common Stock Options Outstanding, Granted          
Common Stock Options Outstanding, Ending balance 185,100 185,100 185,100  
Weighted Average Exercise Price of Options Outstanding, Beginning price $ 9.90 $ 9.90 $ 9.90  
Weighted Average Exercise Price of Options Outstanding, Granted          
Weighted Average Exercise Price of Options Outstanding, Ending price $ 9.90 $ 9.90 $ 9.90  
Common Stock Exercisable Options, Outstanding Beginning balance 185,100 185,100 185,100  
Common Stock Exercisable Options, Outstanding Ending balance 185,100 185,100 185,100  
Weighted Average Price of Exercisable Options, Outstanding Beginning balance $ 9.90 $ 9.90 $ 9.90  
Weighted Average Price of Exercisable Options, Outstanding Ending balance $ 9.90 $ 9.90 $ 9.90