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		6 Months Ended
	Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2019	Nov. 30, 2018
Numerator (basic & diluted):
Net earnings attributable to controlling interest - income available to common shareholders	$ 52,086	$ 34,002	$ 47,310	$ 88,944
Denominator:
Denominator for basic earnings per share attributable to controlling interest - weighted average common shares	55,059	57,716	55,150	58,226
Effect of dilutive securities	1,013	1,622	1,055	1,787
Denominator for diluted earnings per share attributable to controlling interest - adjusted weighted average common shares	56,072	59,338	56,205	60,013
Basic earnings per share attributable to controlling interest	$ 0.95	$ 0.59	$ 0.86	$ 1.53
Diluted earnings per share attributable to controlling interest	$ 0.93	$ 0.57	$ 0.84	$ 1.48