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		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Net Earnings Attributable to Shareholders
Basic earnings attributable to shareholders	$ 414,209	$ 359,068	$ 1,138,123	$ 962,660
Diluted earnings attributable to shareholders	$ 414,209	$ 359,068	$ 1,138,123	$ 962,660
Weighted Average Shares
Weighted average basic shares outstanding	162,029	169,633	164,944	169,398
Effect of dilutive potential common shares	1,221	1,932	1,454	2,151
Weighted average diluted shares outstanding	163,250	171,565	166,398	171,549
Earnings Per Share [Abstract]
Basic earnings attributable to shareholders per share	$ 2.56	$ 2.12	$ 6.90	$ 5.68
Diluted earnings attributable to shareholders per share	$ 2.54	$ 2.09	$ 6.84	$ 5.61