Capital Stock - Schedule of Change in Treasury Shares (Detail) - shares	3 Months Ended	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2022
Stockholders' Equity Note [Abstract]
Beginning balance	10,601,535	10,002,646
Rabbi trust shares distributed/sold	0	(1,111)
Shares repurchased	4,500,000	5,100,000
Ending balance	15,101,535	15,101,535