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, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Net Earnings Attributable to Shareholders
Basic earnings attributable to shareholders	$ 196,800	$ 377,805	$ 422,811	$ 723,914
Diluted earnings attributable to shareholders	$ 196,800	$ 377,805	$ 422,811	$ 723,914
Weighted Average Shares
Weighted average basic shares outstanding	150,435	165,092	152,291	166,423
Effect of dilutive potential common shares	1,128	1,382	1,225	1,557
Weighted average diluted shares outstanding	151,563	166,474	153,516	167,980
Earnings Per Share [Abstract]
Basic earnings attributable to shareholders per share	$ 1.31	$ 2.29	$ 2.78	$ 4.35
Diluted earnings attributable to shareholders per share	$ 1.3	$ 2.27	$ 2.75	$ 4.31