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Common Stock and Treasury Stock (Tables)
9 Months Ended
Sep. 30, 2018
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 September 30, 2018:
 
 
 
Common Stock Issued
 
 
 
Class A
 
 
Class B
 
 
 
(Shares in thousands)
 
Balance, January 1, 2017
 
 
6,638
 
 
 
878
 
Conversion of shares
 
 
17
 
 
 
(17
)
Issuance of restricted stock
 
 
19
 
 
 
29
 
Forfeiture of restricted stock
 
 
(1
)
 
 
 
Exercise of stock options
 
 
21
 
 
 
8
 
Balance, December 31, 2017
 
 
6,694
 
 
 
898
 
Issuance of restricted stock
 
 
4
 
 
 
 
Forfeiture of restricted stock
 
 
(1
)
 
 
 
Balance, September 30, 2018
 
 
6,697
 
 
 
898