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Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2019
Accounting Policies [Abstract]  
Schedule of Weighted Average Number of Shares
The following is a reconciliation between basic and diluted weighted average shares outstanding:
(In thousands)Years Ended December 31,
201920182017
Basic weighted average shares outstanding56,205  58,066  64,905  
Effect of dilution:
Stock options14  15   
Restricted stock units818  866  719  
Diluted weighted average shares outstanding57,037  58,947  65,625  
Schedule of Stock by Class
 Shares Outstanding
(In thousands)
Class A 
Common Stock
Class B 
Common Stock
Balance at December 31, 201657,079  11,484  
Share repurchases(7,790) —  
Employee and non-employee director stock transactions*312  —  
Balance at December 31, 201749,601  11,484  
Share repurchases(5,386) —  
Employee and non-employee director stock transactions*534  —  
Balance at December 31, 201844,749  11,484  
Share repurchases(1,302) —  
Employee and non-employee director stock transactions*631  —  
Balance at December 31, 201944,078  11,484  
*Reflects common stock activity in connection with restricted stock units and stock options granted to employees, as well as in connection with the fulfillment of employees' statutory tax withholding obligations for applicable income and other employment taxes and forfeited employee restricted stock units.