v3.25.2
Property and Equipment, net - Property and Equipment (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Sep. 30, 2024
Property, Plant and Equipment [Line Items]    
Right-of-use assets for finance leases $ 5,680 $ 5,603
Property and equipment, gross 467,236 473,001
Less: Accumulated depreciation and amortization (199,519) (208,204)
Property and equipment, net 267,717 264,797
Land    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 25,601 25,601
Buildings and building improvements    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 167,097 165,667
Buildings and building improvements | Minimum    
Property, Plant and Equipment [Line Items]    
Depreciable Lives (in years) 3 years  
Buildings and building improvements | Maximum    
Property, Plant and Equipment [Line Items]    
Depreciable Lives (in years) 30 years  
Leasehold improvements    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 98,180 94,473
Leasehold improvements | Minimum    
Property, Plant and Equipment [Line Items]    
Depreciable Lives (in years) 1 year  
Leasehold improvements | Maximum    
Property, Plant and Equipment [Line Items]    
Depreciable Lives (in years) 20 years  
Training equipment    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 98,349 119,171
Training equipment | Minimum    
Property, Plant and Equipment [Line Items]    
Depreciable Lives (in years) 3 years  
Training equipment | Maximum    
Property, Plant and Equipment [Line Items]    
Depreciable Lives (in years) 10 years  
Office and computer equipment    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 36,499 36,454
Office and computer equipment | Minimum    
Property, Plant and Equipment [Line Items]    
Depreciable Lives (in years) 3 years  
Office and computer equipment | Maximum    
Property, Plant and Equipment [Line Items]    
Depreciable Lives (in years) 10 years  
Curriculum development    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 5,475 5,127
Curriculum development | Minimum    
Property, Plant and Equipment [Line Items]    
Depreciable Lives (in years) 3 years  
Curriculum development | Maximum    
Property, Plant and Equipment [Line Items]    
Depreciable Lives (in years) 5 years  
Software developed for internal use    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 13,045 13,045
Software developed for internal use | Minimum    
Property, Plant and Equipment [Line Items]    
Depreciable Lives (in years) 1 year  
Software developed for internal use | Maximum    
Property, Plant and Equipment [Line Items]    
Depreciable Lives (in years) 5 years  
Vehicles    
Property, Plant and Equipment [Line Items]    
Depreciable Lives (in years) 5 years  
Property and equipment, gross $ 1,076 1,546
Right-of-use assets for finance leases    
Property, Plant and Equipment [Line Items]    
Depreciable Lives (in years) 15 years  
Construction in progress    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 16,234 $ 6,314