Capital Stock (Tables)

12 Months Ended

Dec. 31, 2023

Common Stock, Number of Shares, Par Value and Other Disclosure [Abstract]

Common Shares Outstanding and Treasury Shares Held Rollforward Table

Common Shares Outstanding	Year Ended December 31,
	2023	2022	2021
At beginning of period	128,662,300	126,937,163	125,976,071
Exercise of common stock options, net	205,877	80,409	10,929
Grants of restricted stock, net(1)	1,210,996	1,644,728	950,163
At end of period	130,079,173	128,662,300	126,937,163

(1)        Prior to 2019, we primarily granted restricted stock awards, which immediately impacted common shares outstanding. In contrast, during 2023, 2022 and 2021, we primarily granted restricted stock units which do not impact common shares outstanding until vesting. Vesting for restricted stock units began in 2020.

Treasury Shares Held	Year Ended December 31,
	2023	2022	2021
At beginning of period	3,138,675	3,138,675	2,953,976
Shares received upon vesting of restricted stock, net	—	—	184,699
At end of period	3,138,675	3,138,675	3,138,675