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Common Stock and Treasury Stock (Tables)
6 Months Ended
Jun. 30, 2013
Stockholders' Equity Note [Abstract]  
Schedule of Stock by Class
The following summarizes information relating to the number of shares of our common stock issued in connection with stock transactions through June 30, 2013:
 
 
 
Common Stock Issued
 
 
 
Class A
 
Class B
 
 
 
(Shares in thousands)
 
Balance, January 1, 2012
 
 
6,360
 
 
797
 
Exercised options
 
 
10
 
 
 
Balance, December 31, 2012
 
 
6,370
 
 
797
 
Exercised options
 
 
5
 
 
 
Conversion of shares
 
 
1
 
 
(1)
 
Balance, June 30, 2013
 
 
6,376
 
 
796