Earnings Per Common Share - Computation of Basic and Diluted Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	May 31, 2023	May 31, 2022	May 31, 2021
Numerator (basic & diluted):
Net earnings attributable to controlling interest - income available to common shareholders	$ 256,528	$ 379,386	$ 723,795
Denominator:
Denominator for basic earnings per common share attributable to controlling interest - weighted average common shares	48,566	49,940	52,701
Effect of dilutive securities	820	1,053	1,216
Denominator for diluted earnings per common share attributable to controlling interest - adjusted weighted average common shares	49,386	50,993	53,917
Basic earnings per common share attributable to controlling interest	$ 5.28	$ 7.60	$ 13.73
Diluted earnings per common share attributable to controlling interest	$ 5.19	$ 7.44	$ 13.42