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Common Stock and Treasury Stock (Tables)
6 Months Ended
Jun. 30, 2017
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, 2017:
 
 
 
Common Stock Issued
 
 
 
Class A
 
Class B
 
 
 
(Shares in thousands)
 
Balance, January 1, 2016
 
 
6,603
 
 
865
 
Conversion of shares
 
 
12
 
 
(12)
 
Issuance of restricted stock
 
 
23
 
 
25
 
Balance, December 31, 2016
 
 
6,638
 
 
878
 
Exercise of stock options
 
 
21
 
 
8
 
Conversion of shares
 
 
4
 
 
(4)
 
Forfeiture of restricted stock
 
 
(1)
 
 
 
Balance, June 30, 2017
 
 
6,662
 
 
882