Goodwill, Service Contracts and Other Assets - Information Regarding Service Contracts and Other Assets (Details) - USD ($) $ in Thousands	Nov. 30, 2021	May 31, 2021
Information regarding service contracts and other assets
Service contracts, net	$ 391,609	$ 408,445
Other assets, carrying amount	637,242	609,133
Other assets, accumulated amortization	342,397	298,719
Other assets, net	294,845	310,414
Capitalized contract costs
Information regarding service contracts and other assets
Other assets, carrying amount	503,933	459,079
Other assets, accumulated amortization	275,004	231,940
Other assets, net	228,929	227,139
Other assets current	81,300	79,400
Noncompete and consulting agreements
Information regarding service contracts and other assets
Other assets, carrying amount	46,380	44,683
Other assets, accumulated amortization	42,859	42,408
Other assets, net	3,521	2,275
Other
Information regarding service contracts and other assets
Other assets, carrying amount	86,929	105,371
Other assets, accumulated amortization	24,534	24,371
Other assets, net	62,395	81,000
Service Contracts
Information regarding service contracts and other assets
Service contracts, carrying amount	971,329	961,942
Service contracts, accumulated amortization	579,720	553,497
Service contracts, net	$ 391,609	$ 408,445