Goodwill, Service Contracts and Other Assets - Information Regarding Service Contracts and Other Assets (Details) - USD ($) $ in Thousands	Feb. 28, 2022	May 31, 2021
Information regarding service contracts and other assets
Service contracts, net	$ 402,366	$ 408,445
Other assets, carrying amount	671,749	609,133
Other assets, accumulated amortization	365,095	298,719
Other assets, net	306,654	310,414
Capitalized contract costs
Information regarding service contracts and other assets
Other assets, carrying amount	529,698	459,079
Other assets, accumulated amortization	297,027	231,940
Other assets, net	232,671	227,139
Other assets current	82,800	79,400
Noncompete and consulting agreements
Information regarding service contracts and other assets
Other assets, carrying amount	50,028	44,683
Other assets, accumulated amortization	43,319	42,408
Other assets, net	6,709	2,275
Other
Information regarding service contracts and other assets
Other assets, carrying amount	92,023	105,371
Other assets, accumulated amortization	24,749	24,371
Other assets, net	67,274	81,000
Service Contracts
Information regarding service contracts and other assets
Service contracts, carrying amount	997,923	961,942
Service contracts, accumulated amortization	595,557	553,497
Service contracts, net	$ 402,366	$ 408,445