Basic and Diluted Earnings per Share - Numerator and Denominator of the Basic and Diluted Per Share Computations for Earnings Attributable to Shareholders Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Net Earnings Attributable to Shareholders
Basic earnings attributable to shareholders	$ 346,109	$ 287,220
Diluted earnings attributable to shareholders	$ 346,109	$ 287,220
Weighted Average Shares
Weighted average basic shares outstanding	167,499	169,214
Effect of dilutive potential common shares	1,717	2,337
Weighted average diluted shares outstanding	169,216	171,551
Earnings Per Share [Abstract]
Basic earnings attributable to shareholders per share	$ 2.07	$ 1.70
Diluted earnings attributable to shareholders per share	$ 2.05	$ 1.67