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Income Taxes - Income Tax Expense/(Benefit) from Continuing Operations (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Apr. 30, 2021 | Apr. 30, 2020 | Apr. 30, 2019
Current: |  |  |
Federal | $ 64,417 | $ 9,877 | $ 5,567
State | 9,530 | 1,841 | 1,918
Total current | 73,947 | 11,718 | 7,485
Deferred: |  |  |
Deferred federal | 358 | (164) | 1,665
Deferred state | 89 | (32) | 134
Total deferred | 447 | (196) | 1,799
Total income tax expense/(benefit) | $ 74,394 | $ 11,522 | $ 9,284

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