Borrowings - Schedule of Unsecured Notes (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Sep. 30, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Unamortized Financing Costs	$ (10,585)	$ (11,306)
Carrying Value	2,755,600		$ 2,060,400
Unsecured Notes
Debt Instrument [Line Items]
Outstanding Principal	1,150,000	1,150,000
Unamortized Financing Costs	(10,600)	(11,300)
Unaccreted Discount	(2,800)	(3,000)
Swap Fair Value Adjustment	18,200	19,500
Carrying Value	1,154,800	1,155,200
Fair Value	1,191,700	1,204,100
2028 Notes | Unsecured Notes
Debt Instrument [Line Items]
Outstanding Principal	350,000	350,000
Unamortized Financing Costs	(2,600)	(2,800)
Unaccreted Discount	(1,000)	(1,100)
Swap Fair Value Adjustment	8,500	9,000
Carrying Value	354,900	355,100
Fair Value	377,400	380,100
2029 Notes | Unsecured Notes
Debt Instrument [Line Items]
Outstanding Principal	400,000	400,000
Unamortized Financing Costs	(3,600)	(3,800)
Unaccreted Discount	(1,700)	(1,800)
Swap Fair Value Adjustment	6,000	6,500
Carrying Value	400,700	400,900
Fair Value	411,900	415,100
2030 Notes | Unsecured Notes
Debt Instrument [Line Items]
Outstanding Principal	400,000	400,000
Unamortized Financing Costs	(4,400)	(4,700)
Unaccreted Discount	(100)	(100)
Swap Fair Value Adjustment	3,700	4,000
Carrying Value	399,200	399,200
Fair Value	$ 402,400	$ 408,900