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Reconciliation of Income Taxes Computed at the U.S. Federal Statutory Tax Rate to Income Tax Expense (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
May 31, 2019 | May 31, 2018 | May 31, 2017
Components Of Deferred Income Tax Assets And Liabilities [Line Items] |  |  |
Tax at U.S. statutory rate | $ 15,321 | $ 21,459 | $ 23,336
Section 199 domestic production deduction |  | (1,167) | (1,057)
Global intangible low-taxed income (GILTI) | 840 |  |
Foreign derived intangible income deduction (FDII) | (1,531) |  |
Foreign rate differential | 495 | (461) | (1,247)
Subpart F income | 842 | 816 | 996
Tax benefits on stock-based compensation | (2,586) | (4,816) | (535)
FIN 48 reserve adjustments | 13 | (1,035) | 576
Provision for state income taxes, net of federal benefit | 1,251 | 975 | 972
Remeasurement of deferred taxes |  | (6,022) |
Transition tax on foreign earnings and profits |  | 1,223 |
Tax credits | (1,726) | (1,151) | (1,213)
Other | (136) | 429 | 872
Provision for Income Taxes | $ 12,783 | $ 10,250 | $ 22,700

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