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Acquisitions Details (Details) - USD ($) $ in Thousands		12 Months Ended
Acquisitions Details (Details) - USD ($) $ in Thousands	Aug. 18, 2025	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023	Dec. 22, 2021
Business Acquisition [Line Items]
Cash paid at closing	$ 148,487
Operating lease right-of-use assets		$ 8,430	$ 10,207
Operating lease liabilities		8,671	11,228
Acquisition costs		1,900
Goodwill		392,872	342,774	$ 341,593
Maximum borrowing capacity					$ 215,000
Total reported lease liability		$ 12,032	$ 14,201
Jolt
Business Acquisition [Line Items]
Weighted average useful life identifiable intangibles	15 years 9 months 18 days
Goodwill	$ 50,209
Business Acquisition, Goodwill, Expected Tax Deductible Amount	$ 11,000
Maximum
Business Acquisition [Line Items]
Useful life identifiable intangibles		20 years 6 months
Customer Relationships \| Jolt
Business Acquisition [Line Items]
Weighted average useful life identifiable intangibles	17 years
Purchased and Core Technology \| Jolt
Business Acquisition [Line Items]
Weighted average useful life identifiable intangibles	11 years
Trademarks \| Jolt
Business Acquisition [Line Items]
Weighted average useful life identifiable intangibles	7 years 6 months