v3.25.2
Borrowings - Schedule of Unsecured Notes (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Sep. 30, 2024
Jun. 30, 2024
Debt Instrument [Line Items]      
Unamortized Financing Costs $ (7,126) $ (8,526)  
Carrying Value 2,409,400   $ 1,610,000
Unsecured Notes      
Debt Instrument [Line Items]      
Outstanding Principal 750,000 750,000  
Unamortized Financing Costs (7,200) (8,500)  
Unaccreted Discount (3,100) (3,800)  
Swap Fair Value Adjustment 15,100 21,600  
Carrying Value 754,800 759,300  
Fair Value 786,200 790,600  
2028 Unsecured Notes | Unsecured Notes      
Debt Instrument [Line Items]      
Outstanding Principal 350,000 350,000  
Unamortized Financing Costs (3,100) (3,700)  
Unaccreted Discount (1,200) (1,500)  
Swap Fair Value Adjustment 9,000 12,400  
Carrying Value 354,700 357,200  
Fair Value 377,100 378,600  
2029 Unsecured Notes | Unsecured Notes      
Debt Instrument [Line Items]      
Outstanding Principal 400,000 400,000  
Unamortized Financing Costs (4,100) (4,800)  
Unaccreted Discount (1,900) (2,300)  
Swap Fair Value Adjustment 6,100 9,200  
Carrying Value 400,100 402,100  
Fair Value $ 409,100 $ 412,000