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Earnings Per Share - Computation of Basic and Diluted Earnings Per Share Attributable to Controlling Interest (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 9 Months Ended
Feb. 28, 2019
Feb. 28, 2018
Feb. 28, 2019
Feb. 28, 2018
Numerator (basic & diluted):        
Net earnings attributable to controlling interest - income available to common shareholders $ 26,773 $ 79,088 $ 115,717 $ 164,025
Denominator:        
Denominator for basic earnings per share attributable to controlling interest-weighted average common shares 56,478 60,383 57,650 61,451
Effect of dilutive securities 1,496 1,962 1,739 2,056
Denominator for diluted earnings per share attributable to controlling interest-adjusted weighted average common shares 57,974 62,345 59,389 63,507
Basic earnings per share attributable to controlling interest $ 0.47 $ 1.31 $ 2.01 $ 2.67
Diluted earnings per share attributable to controlling interest $ 0.46 $ 1.27 $ 1.95 $ 2.58