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Stock-Based Compensation (Tables)
9 Months Ended
Sep. 30, 2022
Share-Based Payment Arrangement [Abstract]  
Summary of Activity
The following table summarizes the weighted-average assumptions used to determine the awards grant date fair value:
Nine Months Ended September 30,
Restricted Shares and Performance Based Shares20222021
Expected quarterly dividends per share$0.3475 $0.3275 
Risk-free interest rate1.46 %0.32 %
Market-Based Shares
Dividend yield— %2.76 %
Expected volatility— %33.69 %
Risk-free interest rate— %0.29 %

The following table summarizes activity in restricted stock awards, including performance-based and market-based shares for the nine months ended September 30, 2022:
Restricted Stock
SharesWeighted-
Average
Grant Date Fair Value
Outstanding at December 31, 2021167,270 $43.71 
Granted
193,943 41.04 
Released(172,409)42.48 
Forfeited
(2,709)42.48 
Outstanding at September 30, 2022186,095 $42.09 
The following table provides additional information concerning restricted stock activity, including performance-based and market-based shares:
Nine Months Ended September 30,
Restricted Stock20222021
Weighted-average grant date fair value$41.04 $43.48 
Total fair value of restricted shares that vested (in thousands)$7,804 $10,018