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Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2023
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:

Six Months Ended June 30,
Restricted Shares and Performance Based Shares20232022
Expected quarterly dividends per share$0.3675 $0.3475 
Risk-free interest rate4.46 %1.46 %

The following table summarizes activity in restricted stock awards, including performance-based and market-based shares for the six months ended June 30, 2023:
Restricted Stock
SharesWeighted-
Average
Grant Date Fair Value
Outstanding at December 31, 2022182,446 $42.09 
Granted
194,453 45.00 
Released(197,120)43.99 
Forfeited
(1,222)42.57 
Outstanding at June 30, 2023178,557 $43.31 
The following table provides additional information concerning restricted stock activity, including performance-based and market-based shares:
Six Months Ended June 30,
Restricted Stock20232022
Weighted-average grant date fair value$45.00 $41.04 
Total fair value of restricted shares that vested (in thousands)$9,622 $7,782