Capital Stock - Summary of Treasury Shares Held (Details) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Common Shares Outstanding and Treasury Shares Held Rollforward [Table]
Treasury stock, beginning balance	2,953,976	2,823,191	2,717,569
Shares received upon vesting of restricted stock, net	184,699	130,785	105,622
Treasury stock, ending balance	3,138,675	2,953,976	2,823,191