v3.23.3
Borrowings - Components of the Carrying Value of Notes (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Aug. 15, 2023
Sep. 30, 2022
May 18, 2021
Feb. 25, 2020
Debt Instrument [Line Items]          
Unamortized financing costs $ (7,076)   $ (5,020)    
Net carrying value 1,600,731   1,301,043    
2025 Notes          
Debt Instrument [Line Items]          
Principal amount 300,000   300,000   $ 300,000
Unamortized financing costs (1,100)   (1,800)    
Unaccreted discount (700)   (1,200)   $ (2,500)
Interest rate swap fair value adjustment 0   0    
Net carrying value 298,200   297,000    
Fair Value 286,400   283,100    
2027 Notes          
Debt Instrument [Line Items]          
Principal amount 350,000   350,000 $ 350,000  
Unamortized financing costs (2,500)   (3,200)    
Unaccreted discount (600)   (700) $ (1,000)  
Interest rate swap fair value adjustment (40,500)   (42,000)    
Net carrying value 306,400   304,100    
Fair Value 301,800   $ 294,000    
2029 Notes          
Debt Instrument [Line Items]          
Principal amount 300,000 $ 300,000      
Unamortized financing costs (3,500)        
Unaccreted discount (3,400) $ (3,500)      
Interest rate swap fair value adjustment (7,000)        
Net carrying value 286,100        
Fair Value $ 290,000