Annual report [Section 13 and 15(d), not S-K Item 405]

Debt And Derivatives - Narrative (Details)

v3.25.3
Debt And Derivatives - Narrative (Details) - USD ($)
12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Debt Instrument [Line Items]    
Annual effective interest rate 5.37%  
Other Assets    
Debt Instrument [Line Items]    
Fair value of derivative asset $ 5,500,000 $ 12,600,000
Other Liabilities    
Debt Instrument [Line Items]    
Fair value of derivative liability 1,700,000 3,400,000
Revolving Credit Facility    
Debt Instrument [Line Items]    
Debt instrument, face amount $ 750,000,000  
Revolving Credit Facility | Minimum    
Debt Instrument [Line Items]    
Commitment fee percentage 0.125%  
Revolving Credit Facility | Maximum    
Debt Instrument [Line Items]    
Commitment fee percentage 0.30%  
Letter of Credit    
Debt Instrument [Line Items]    
Maximum borrowing capacity $ 3,000,000 3,000,000
Term Loan A (TLA) | Minimum    
Debt Instrument [Line Items]    
Basis spread on variable rate 1.00%  
Term Loan A (TLA) | Maximum    
Debt Instrument [Line Items]    
Basis spread on variable rate 2.00%  
Secured Debt | Term Loan B (TLB)    
Debt Instrument [Line Items]    
Basis spread on variable rate 2.00%  
Floor interest rate 0.50%  
Secured Debt | Term Loan A, Due September 2024 | Interest Rate Swaps    
Debt Instrument [Line Items]    
Notional Amount   $ 150,000,000
Fixed Interest Rate   4.38%
Secured Debt | Term Loan B, Due September 2025 | Interest Rate Swaps    
Debt Instrument [Line Items]    
Notional Amount   $ 75,000,000
Fixed Interest Rate   4.09%
Subsidiary loan agreements    
Debt Instrument [Line Items]    
Subsidiary loan agreements $ 0 $ 5,194,000