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Shareholders' Equity
6 Months Ended
Jun. 30, 2022
Equity [Abstract]  
Shareholders' Equity Shareholders’ Equity
The following table details activity in our common stock ($ in thousands):
Three Months Ended June 30,Six Months Ended June 30,
2022202120222021
SharesAmountSharesAmountSharesAmountSharesAmount
Purchases of treasury shares— $— (32)$(12,975)— $— (32)$(12,975)
Stock option exercises 51 8,178 89 11,286 101 16,223 210 29,388 
Employee stock plan purchases12 4,478 3,162 20 8,156 17 6,200 
Restricted stock units vested, net of withheld shares upon award settlement50 (7,743)43 (7,052)128 (20,330)99 (16,010)
As of June 30, 2022, we have authorization from our board of directors to repurchase up to 2.4 million additional shares of our common stock.