Income Taxes - Components of Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2022	May 31, 2021	May 31, 2020
Current:
Federal	$ 162,269	$ 164,104	$ 153,736
State and local	32,431	42,340	34,502
Foreign	16,676	12,417	6,985
Current income tax expense	211,376	218,861	195,223
Deferred	51,635	(42,080)	(13,292)
Income taxes	$ 263,011	$ 176,781	$ 181,931