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Earnings per Share (EPS) and Common Stock (Tables) | 6 Months Ended
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Mar. 31, 2026
Earnings Per Share And Common Stock [Abstract] |
Earnings Per Share Basic and Diluted | The following table presents the calculation for both basic and diluted EPS:
(in thousands, except per share data) |  | Three months ended |  |  | Six months ended |
|  | March 31, 2026 |  |  | March 31, 2025 |  |  | March 31, 2026 |  |  | March 31, 2025 |
Net income |  | $ | 590,723 |  |  | $ | 162,644 |  |  | $ | 757,241 |  |  | $ | 244,876 |
Weighted-average shares outstanding—Basic |  |  | 118,185 |  |  |  | 120,177 |  |  |  | 118,764 |  |  |  | 120,210 |
Dilutive effect of restricted stock units |  |  | 368 |  |  |  | 677 |  |  |  | 513 |  |  |  | 790 |
Weighted-average shares outstanding—Diluted |  |  | 118,553 |  |  |  | 120,854 |  |  |  | 119,277 |  |  |  | 121,000 |
Earnings per share—Basic |  | $ | 5.00 |  |  | $ | 1.35 |  |  | $ | 6.38 |  |  | $ | 2.04 |
Earnings per share—Diluted |  | $ | 4.98 |  |  | $ | 1.35 |  |  | $ | 6.35 |  |  | $ | 2.02 |

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- Definition Earnings per share (EPS) and common stock. + References No definition available. + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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