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v3.26.1

Income Taxes (Tables) | 6 Months Ended
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Mar. 31, 2026
Income Tax Disclosure [Abstract] |
Summary of Income Taxes |
(in thousands) |  | Three months ended |  |  | Six months ended |
|  | March 31, 2026 |  |  | March 31, 2025 |  |  | March 31, 2026 |  |  | March 31, 2025 |
Income before income taxes |  | $ | 746,799 |  |  | $ | 205,249 |  |  | $ | 949,774 |  |  | $ | 298,403 |
Provision for income taxes |  | $ | 156,076 |  |  | $ | 42,605 |  |  | $ | 192,533 |  |  | $ | 53,527 |
Effective income tax rate |  |  | 21 | % |  |  | 21 | % |  |  | 20 | % |  |  | 18 | %

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- Definition Schedule of income tax. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Period Type: | duration