Employee Benefit Plan	12 Months Ended
Sep. 30, 2025
Deferred Compensation Arrangements [Abstract]
Employee Benefit Plan	12. Employee Benefit Plan We offer a savings plan to eligible U.S. employees. The plan is qualified under Section 401(k) of the Internal Revenue Code. Participating employees may defer a portion of their pre-tax compensation, as defined, but not more than statutory limits. We contribute 50% of the amount contributed by the employee, up to a maximum of 3% of the employee’s earnings. Our matching contributions vest immediately. We made matching contributions of $9.3 million, $9.2 million and $8.6 million in 2025, 2024 and 2023, respectively.

The entire disclosure for an entity's employee compensation and benefit plans, including, but not limited to, postemployment and postretirement benefit plans, defined benefit pension plans, defined contribution plans, non-qualified and supplemental benefit plans, deferred compensation, share-based compensation, life insurance, severance, health care, unemployment and other benefit plans.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 715
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/715/tableOfContent

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 712
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/712/tableOfContent

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 710
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/710/tableOfContent

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 718
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/718/tableOfContent

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