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Net Income Per Share (Tables) | 6 Months Ended
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Mar. 31, 2025
Net Income Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted | The following table sets forth the computation of basic and diluted net income per share (in thousands, except per share data):
|  | Three months ended March 31, |  | Six months ended March 31,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
Numerator |  |  |  |  |  |  |  |
Net income |  | $ | 145,530 |  |  | $ | 119,021 |  |  | $ | 311,975 |  |  | $ | 257,403 |
Denominator |  |  |  |  |  |  |  |
Weighted average shares outstanding — basic |  | 57,886 |  |  | 58,788 |  |  | 58,098 |  |  | 58,956 |
Dilutive effect of common shares from stock options and restricted stock units |  | 878 |  |  | 792 |  |  | 815 |  |  | 661 |
Weighted average shares outstanding — diluted |  | 58,764 |  |  | 59,580 |  |  | 58,913 |  |  | 59,617 |
Basic net income per share |  | $ | 2.51 |  |  | $ | 2.02 |  |  | $ | 5.37 |  |  | $ | 4.37 |
Diluted net income per share |  | $ | 2.48 |  |  | $ | 2.00 |  |  | $ | 5.30 |  |  | $ | 4.32 |

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- Definition Net Income Per Share [Abstract] + 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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