v3.26.1
Income Taxes - Reconciliation of Federal Statutory Corporate Income Tax Rate to Total Tax Provision upon Adoption of ASU 2023-09 (Detail) - USD ($)
$ in Thousands
12 Months Ended
May 31, 2026
May 31, 2025
May 31, 2024
Income Tax Disclosure [Abstract]      
Federal statutory corporate income tax rate $ 42,504 $ 27,277 $ 15,597
Federal statutory corporate income tax rate, percent 21.00% 21.00% 21.00%
State and local income taxes, net of federal tax benefit [1] $ 4,000 $ 3,458 $ 5,377
State and local income taxes, net of federal tax benefit, percent [1] 2.00% 2.70% 7.20%
Foreign tax effects $ 86 $ 1,044 $ 347
Foreign tax effects, percent   0.80% 0.50%
Executive compensation $ 1,399 $ 2,021 $ 3,622
Executive compensation, percent 0.70% 1.60% 4.90%
Excess benefit related to share-based payment awards $ (750) $ (745) $ (1,643)
Excess benefit related to share-based payment awards, percent (0.40%) (0.60%) (2.20%)
Spin-off transaction costs     $ 5,588
Spin-off transaction costs, percent     7.50%
Tax impact of SES impairment and deconsolidation     $ 8,213
Tax impact of SES impairment and deconsolidation, percent     11.10%
Changes in valuation allowance $ 1,151 $ 2,686 $ 2,346
Changes in valuation allowance, percent 0.60% 2.10% 3.20%
Change in Uncertain Tax Benefits $ (1,827) $ (1,547) $ 257
Change in Uncertain Tax Benefits, percent (0.90%) (1.20%) 0.30%
Other $ (250) $ (355) $ (677)
Other, percent (0.10%) (0.30%) (0.90%)
Total $ 46,313 $ 33,839 $ 39,027
Effective tax rate attributable to controlling interest, percent 22.90% 26.10% 52.60%
[1] For the year ended May 31, 2026, state taxes in California, Illinois, and New York make up greater than 50% of the tax effect in this category. For the year ended May 31, 2025, state taxes in California and Illinois make up greater than 50% of the tax effect in this category. For the year ended May 31, 2024, state taxes in California, Wisconsin, New York, and Illinois make up greater than 50% of the tax effect in this category.