Goodwill, Service Contracts and Other Assets - Information Regarding Service Contracts and Other Assets (Details) - USD ($) $ in Thousands	May 31, 2023	May 31, 2022	May 31, 2021
Information regarding service contracts and other assets
Total future amortization expense	$ 700,709
Other assets, carrying amount	863,965	$ 728,160
Other assets, accumulated amortization	480,974	384,050
Other assets, net	382,991	344,110
Capitalized contract costs
Information regarding service contracts and other assets
Other assets, carrying amount	665,705	551,582
Other assets, accumulated amortization	413,680	319,358
Other assets, net	252,025	232,224
Current portion of capitalized contract costs	92,500	83,700
Noncompete and consulting agreements and other
Information regarding service contracts and other assets
Other assets, carrying amount	198,260	176,578
Other assets, accumulated amortization	67,294	64,692
Other assets, net	130,966	111,886
Service contracts
Information regarding service contracts and other assets
Service contracts, carrying amount	1,004,754	1,001,311
Service contracts, accumulated amortization	658,180	609,673
Total future amortization expense	$ 346,574	$ 391,638	$ 408,445