Annual report pursuant to Section 13 and 15(d)

Debt - Additional Information (Details)

v3.23.3
Debt - Additional Information (Details)
 12 Months Ended
Sep. 30, 2023
USD ($)
Sep. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Jul. 01, 2022
USD ($)
Debt Instrument [Line Items]        
Fixed coverage ratio 2.56 2.56    
Leverage ratio 1.72 2.79    
Interest expense, borrowings $ 18,700,000 $ 7,900,000 $ 2,500,000  
Amortization of deferred issuance costs and debt discounts 300,000 200,000 $ 300,000  
Interest rate swaps        
Debt Instrument [Line Items]        
Interest rate swaps 300,000,000 300,000,000   $ 300,000,000
Fair value of interest rate swaps 26,900,000 24,700,000    
Revolving Credit Facility        
Debt Instrument [Line Items]        
Maximum borrowing capacity 325,000,000      
Long-term debt 93,100,000 105,100,000    
Remaining borrowing capacity 222,100,000 208,600,000    
Term Loan        
Debt Instrument [Line Items]        
Long-term debt $ 283,800,000 $ 271,900,000    
Term Loan | SOFR        
Debt Instrument [Line Items]        
Basis spread on variable rate 0.10%      
Term Loan | Term SOFR        
Debt Instrument [Line Items]        
Basis spread on variable rate 0.10%      
Term Loan | Line of Credit        
Debt Instrument [Line Items]        
Maximum borrowing capacity $ 250,000,000      
Term Loan - 11 Quarters        
Debt Instrument [Line Items]        
Line of credit, principal repayment rate 1.25%      
Term Loan - 8 Quarters        
Debt Instrument [Line Items]        
Line of credit, principal repayment rate 1.875%      
Delayed Draw Term Facility | Line of Credit        
Debt Instrument [Line Items]        
Maximum borrowing capacity $ 50,000,000      
Credit Agreement | Minimum        
Debt Instrument [Line Items]        
Fixed coverage ratio 1.20      
Credit Agreement | Maximum        
Debt Instrument [Line Items]        
Fixed coverage ratio 3.50