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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, 2020
Mar. 31, 2019
Net Earnings Attributable to Shareholders    
Basic earnings attributable to shareholders $ 122,344 $ 139,699
Diluted earnings attributable to shareholders $ 122,344 $ 139,699
Weighted Average Shares    
Weighted average basic shares outstanding 168,735 171,818
Effect of dilutive potential common shares 2,715 3,570
Weighted average diluted shares outstanding 171,450 175,388
Earnings Per Share    
Basic earnings attributable to shareholders per share $ 0.73 $ 0.81
Diluted earnings attributable to shareholders per share $ 0.71 $ 0.80