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Leases - Narrative (Details)
ft² in Thousands, $ in Millions
9 Months Ended
Jun. 30, 2025
USD ($)
ft²
Lessee, Lease, Description [Line Items]  
Sublease Income $ 8.2
Sublease income payment remainder of fiscal year 0.7
Lessor, Operating Lease, Payments to be Received, two to nine $ 7.5
Office Building  
Lessee, Lease, Description [Line Items]  
Operating lease, number of square feet | ft² 515