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Common Stock Issued and Outstanding (Tables)
 9 Months Ended
Sep. 30, 2024
Equity [Abstract]  
Activity in Number of Shares of Common Stock Issued and Outstanding
Activity in the number of shares of common stock issued and outstanding for the nine-month periods ended September 30, 2024 and 2023 is shown below.
(Number of shares outstanding)
September 30, 2024September 30, 2023
Beginning of period152,748,642 155,467,319 
Stock options exercised 1
– 520 
Restricted stock awards 1
1,103,503 689,824 
Treasury shares purchased
(8,008,786)(1,684,522)
End of period145,843,359 154,473,141 
1 Shares issued upon exercise of stock options and award of restricted stock are less withholding for statutory income taxes owed upon issuance of shares.