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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Sep. 30, 2025
Accounting Policies [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) |  | Year ended September 30, |
|  | 2025 |  |  | 2024 |  |  | 2023 |
Net income |  | $ | 733,997 |  |  | $ | 376,333 |  |  | $ | 245,540 |
Weighted average shares outstanding |  |  | 120,005 |  |  |  | 119,679 |  |  |  | 118,341 |
Dilutive effect of employee stock options, restricted shares and restricted stock units |  |  | 772 |  |  |  | 1,063 |  |  |  | 993 |
Diluted weighted average shares outstanding |  |  | 120,777 |  |  |  | 120,742 |  |  |  | 119,334 |
Earnings per share—Basic |  | $ | 6.12 |  |  | $ | 3.14 |  |  | $ | 2.07 |
Earnings per share—Diluted |  | $ | 6.08 |  |  | $ | 3.12 |  |  | $ | 2.06 |

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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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