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	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net Earnings Attributable to Shareholders
Basic earnings attributable to shareholders	$ 1,415,492	$ 696,140	$ 590,395
Diluted earnings attributable to shareholders	$ 1,415,492	$ 696,140	$ 590,395
Weighted Average Shares
Weighted average basic shares outstanding	169,145	168,333	170,899
Effect of dilutive potential common shares	2,105	2,563	3,310
Weighted average diluted shares outstanding	171,250	170,896	174,209
Earnings Per Share [Abstract]
Basic earnings attributable to shareholders per share	$ 8.37	$ 4.14	$ 3.45
Diluted earnings attributable to shareholders per share	$ 8.27	$ 4.07	$ 3.39