Summary of Significant Accounting Policies - Schedule of fixed assets (Details) - USD ($) $ in Thousands	May 31, 2026	May 31, 2025
Fixed Assets
Less: Accumulated depreciation	$ (98,647)	$ (91,211)
Fixed assets, net	75,619	81,667
Depreciable fixed assets
Fixed Assets
Fixed assets, gross	150,425	148,560
Fixed assets, net	51,778	57,349
Building and building equipment
Fixed Assets
Fixed assets, gross	52,366	52,340
Furniture and fixtures
Fixed Assets
Fixed assets, gross	8,299	7,796
Computer software and hardware
Fixed Assets
Fixed assets, gross	88,355	87,122
Other
Fixed Assets
Fixed assets, gross	1,405	1,302
Land
Fixed Assets
Fixed assets, gross	23,796	23,796
Software development in progress
Fixed Assets
Fixed assets, gross	$ 45	$ 522