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Stock Based Compensation Plan (Tables)
3 Months Ended
Mar. 31, 2021
Stock Based Compensation Plan [Abstract]  
Award Activity
The following table summarizes our award activity during the three months ended March 31, 2021:

 
Service-Based
Restricted Stock Awards
   
Performance-Based
Restricted Stock Awards
 
   
Shares or Units (#)
   
Weighted-Average
Award Price ($)
   
Shares or Units (#)
   
Weighted-Average
Award Price ($)
 
Outstanding at December 31, 2020
   
239,281
     
20.77
     
213,895
     
21.08
 
Granted/Issued
   
114,368
     
32.96
     
91,485
     
32.75
 
Awards vested or rights exercised (1)
   
     
     
(56,578
)
   
22.95
 
Forfeited
   
(1,225
)
   
23.94
     
     
 
Additional units earned due to performance
   
     
     
77,265
     
20.42
 
Outstanding at March 31, 2021
   
352,424
     
24.71
     
326,067
     
23.87
 
Restricted units expected to vest
   
352,424
     
24.71
     
383,882
     
25.26
 

(1)
Includes shares repurchased from employees for employee’s tax liability.