Summary of Significant Accounting Policies - Schedule of fixed assets (Details) - USD ($) $ in Thousands	May 31, 2022	May 31, 2021
Fixed Assets
Fixed assets, gross	$ 112,556	$ 111,759
Less: accumulated depreciation	(73,258)	(66,777)
Net depreciable fixed assets	39,298	44,982
Fixed assets, net	101,762	91,882
Building and building equipment
Fixed Assets
Fixed assets, gross	50,177	50,090
Furniture and fixtures
Fixed Assets
Fixed assets, gross	6,254	6,039
Computer software and hardware
Fixed Assets
Fixed assets, gross	55,101	54,582
Other
Fixed Assets
Fixed assets, gross	1,024	1,048
Land
Fixed Assets
Fixed assets, gross	23,796	23,796
Software development in progress
Fixed Assets
Fixed assets, gross	$ 38,668	$ 23,104

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