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Income Taxes (Tables) | 12 Months Ended
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Apr. 30, 2024
Income Tax Disclosure [Abstract] |
Schedule of Components of Income Tax Expense (Benefit) | Income tax expense attributable to earnings consisted of the following components:
| Years ended April 30,
| 2024 |  | 2023 |  | 2022
Current tax expense: |  |  |  |  |
Federal | $ | 78,542 |  |  | $ | 95,336 |  |  | $ | 4,382 |
State | 22,394 |  |  | 22,365 |  |  | 13,835 |
| 100,936 |  |  | 117,701 |  |  | 18,217 |
Deferred tax expense | 53,252 |  |  | 23,126 |  |  | 82,721 |
Total income tax expense | $ | 154,188 |  |  | $ | 140,827 |  |  | $ | 100,938 |
Schedule of Deferred Tax Assets and Liabilities | The tax effects of temporary differences that gave rise to significant portions of the deferred tax assets and deferred tax liabilities were as follows:
| As of April 30,
| 2024 |  | 2023
Deferred tax assets: |  |  |
Accrued liabilities and reserves | $ | 9,075 |  |  | $ | 7,031 |
Deferred revenue | 15,222 |  |  | 15,565 |
Accrued bonus compensation | 10,272 |  |  | 9,361 |
Workers compensation | 11,281 |  |  | 11,500 |
Operating and finance lease obligations | 55,739 |  |  | 52,464 |
Asset retirement obligations | 10,036 |  |  | 9,404 |
Deferred compensation | 2,909 |  |  | 3,242 |
Equity compensation | 8,018 |  |  | 8,305 |
State net operating losses and tax credits | 2,568 |  |  | 1,807 |
Other | 4,523 |  |  | 3,551 |
Total gross deferred tax assets | 129,643 |  |  | 122,230 |
Less valuation allowance | 550 |  |  | 250 |
Total net deferred tax assets | 129,093 |  |  | 121,980 |
Deferred tax liabilities: |  |  |
Property and equipment depreciation | (667,680) |  |  | (617,154) |
Goodwill | (52,900) |  |  | (43,900) |
Other | (5,363) |  |  | (4,524) |
Total gross deferred tax liabilities | (725,943) |  |  | (665,578) |
Net deferred tax liability | $ | (596,850) |  |  | $ | (543,598) |
Schedule of Effective Income Tax Rate Reconciliation |
| Years ended April 30,
| 2024 |  | 2023 |  | 2022
Income taxes at the statutory rates | 21.0 | % |  | 21.0 | % |  | 21.0 | %
Federal tax credits | (1.0) | % |  | (1.3) | % |  | (1.8) | %
State income taxes, net of federal tax benefit | 3.7 | % |  | 4.0 | % |  | 3.8 | %
Impact of phased-in state law changes, net of federal benefit | (1.0) | % |  | (0.4) | % |  | (0.8) | %
ASU 2016-09 benefit (share-based compensation) | (0.1) | % |  | (0.3) | % |  | (1.0) | %
Nondeductible executive compensation | 0.9 | % |  | 1.1 | % |  | 1.2 | %
Other | — | % |  | (0.1) | % |  | 0.5 | %
| 23.5 | % |  | 24.0 | % |  | 22.9 | %
Schedule of Unrecognized Tax Benefits | A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:
| 2024 |  | 2023
Beginning balance | $ | 10,957 |  |  | $ | 10,259 |
Additions based on tax positions related to current year | 2,570 |  |  | 2,867 |
Reductions due to lapse of applicable statute of limitations | (2,780) |  |  | (2,169) |
Ending balance | $ | 10,747 |  |  | $ | 10,957 |

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-9 + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-2 + Details
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