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Share-Based Compensation (Tables)
3 Months Ended
Mar. 31, 2022
Shares awarded to non-employee directors [Line Items]  
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan
The table below presents the amounts included in net income related to share-based compensation expense for the three months ended March 31, 2022 and 2021:
    
Three Months Ended
March 31,
20222021
(in thousands)  
Awards to non-employee directors$234 $188 
Awards to key employees1,979 1,688 
Total compensation expense2,213 1,876 
Less: tax benefit(571)(487)
Share-based compensation amounts included in net income$1,642 $1,389 
Award to key employees [Member]  
Shares awarded to non-employee directors [Line Items]  
Schedule of Share-based Compensation, Activity
The table below presents the summary of the stock activity for awards to key employees for the three months ended March 31, 2022: 
Number of SharesWeighted Average
Fair Value
Outstanding—December 31, 2021197,398 $94.15 
Granted63,382 $123.68 
Vested(60,850)$90.60 
Expired557 $91.42 
Outstanding—March 31, 2022200,487 $105.32