Fair Value Measurements (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Aug. 31, 2021	May 31, 2021
Fair value on a recurring basis
Cash and cash equivalents	$ 79,749	$ 493,640
Other assets, net:
Total assets at fair value	98,084	534,040
Current and long-term accrued liabilities:
Total liabilities at fair value	88,736	61,567
Interest rate lock agreements
Current and long-term accrued liabilities:
Interest rate lock agreements	88,736	61,567
Interest rate lock agreements | Other assets, net
Other assets, net:
Interest rate lock agreements	18,335	40,400
Level 1
Fair value on a recurring basis
Cash and cash equivalents	79,749	493,640
Other assets, net:
Total assets at fair value	79,749	493,640
Current and long-term accrued liabilities:
Total liabilities at fair value	0	0
Level 1 | Interest rate lock agreements
Current and long-term accrued liabilities:
Interest rate lock agreements	0	0
Level 1 | Interest rate lock agreements | Other assets, net
Other assets, net:
Interest rate lock agreements	0	0
Level 2
Fair value on a recurring basis
Cash and cash equivalents	0	0
Other assets, net:
Total assets at fair value	18,335	40,400
Current and long-term accrued liabilities:
Total liabilities at fair value	88,736	61,567
Level 2 | Interest rate lock agreements
Current and long-term accrued liabilities:
Interest rate lock agreements	88,736	61,567
Level 2 | Interest rate lock agreements | Other assets, net
Other assets, net:
Interest rate lock agreements	18,335	40,400
Level 3
Fair value on a recurring basis
Cash and cash equivalents	0	0
Other assets, net:
Total assets at fair value	0	0
Current and long-term accrued liabilities:
Total liabilities at fair value	0	0
Level 3 | Interest rate lock agreements
Current and long-term accrued liabilities:
Interest rate lock agreements	0	0
Level 3 | Interest rate lock agreements | Other assets, net
Other assets, net:
Interest rate lock agreements	$ 0	$ 0