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Acquisitions (Assets Acquired and Liabilities Assumed) (Details) - USD ($)
$ in Thousands
Aug. 18, 2025
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2023
Business Acquisition [Line Items]        
Cash $ 148,487      
Identifiable intangible assets   $ (57,926) $ (25,533)  
Goodwill   392,872 342,774 $ 341,593
Operating lease right-of-use assets   8,430 10,207  
Total reported lease liability   $ 12,032 $ 14,201  
Jolt        
Business Acquisition [Line Items]        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Tangible Assets Acquired (Liabilities) Assumed (4,694)      
Deferred Tax Assets, Operating Loss Carryforwards 13,798      
Identifiable intangible assets (30,326)      
Goodwill 50,209      
Total assets acquired and liabilities assumed $ 148,487      
Weighted average useful life identifiable intangibles 15 years 9 months 18 days      
Customer Relationships | Jolt        
Business Acquisition [Line Items]        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill $ 99,000      
Weighted average useful life identifiable intangibles 17 years      
Trademarks | Jolt        
Business Acquisition [Line Items]        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill $ 4,500      
Weighted average useful life identifiable intangibles 7 years 6 months      
Purchased and Core Technology | Jolt        
Business Acquisition [Line Items]        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill $ 16,000      
Weighted average useful life identifiable intangibles 11 years