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Equity (Tables)
3 Months Ended
Mar. 31, 2021
Equity [Abstract]  
Schedule of Activity for Class B Common Stock and Treasury Stock
The following table presents the activity for the Class B common stock and Treasury stock for the three months ended March 31, 2021 and 2020. Class A shares have been excluded as there was no activity during these same periods.
 Three Months Ended
March 31,
20212020
Class B Shares
Beginning Balance99,331,443 101,130,379 
Stock Award Activity 712,924 649,581 
Purchase of Treasury Stock(1,505,000)(714,251)
Ending Balance98,539,367 101,065,709 
Treasury Shares
Beginning Balance10,174,013 8,375,077 
Stock Award Activity (712,924)(649,581)
Purchase of Treasury Stock1,505,000 714,251 
Ending Balance10,966,089 8,439,747