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, 2021	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020
Numerator (basic & diluted):
Net earnings attributable to controlling interest - income available to common shareholders	$ 67,609	$ 15,311	$ 610,240	$ 62,621
Denominator:
Denominator for basic earnings per share attributable to controlling interest- weighted average common shares	52,149	54,930	53,076	55,078
Effect of dilutive securities	1,068	968	1,001	1,086
Denominator for diluted earnings per share attributable to controlling interest-adjusted weighted average common shares	53,217	55,898	54,077	56,164
Basic earnings per share attributable to controlling interest	$ 1.30	$ 0.28	$ 11.50	$ 1.14
Diluted earnings per share attributable to controlling interest	$ 1.27	$ 0.27	$ 11.28	$ 1.11