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		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net Earnings Attributable to Shareholders
Basic earnings attributable to shareholders	$ 377,805	$ 316,372	$ 723,914	$ 603,592
Diluted earnings attributable to shareholders	$ 377,805	$ 316,372	$ 723,914	$ 603,592
Weighted Average Shares
Weighted average basic shares outstanding	165,092	169,210	166,423	169,140
Effect of dilutive potential common shares	1,382	2,467	1,557	2,520
Weighted average diluted shares outstanding	166,474	171,677	167,980	171,660
Earnings Per Share [Abstract]
Basic earnings attributable to shareholders per share	$ 2.29	$ 1.87	$ 4.35	$ 3.57
Diluted earnings attributable to shareholders per share	$ 2.27	$ 1.84	$ 4.31	$ 3.52