Borrowings - Schedule of Components of the Company's Interest Expense and Other Debt Financing Expenses, Average Debt Outstanding Balances and Average Stated Interest Rates (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Borrowings
Amortization of debt issuance costs	$ 2,289	$ 2,226	$ 5,142	$ 4,225
Total interest and other debt financing expenses	44,272	30,372	83,865	57,592
Average debt outstanding	$ 2,448,090	$ 1,459,289	$ 2,288,822	$ 1,386,197
Average stated interest rate	6.90%	7.80%	6.90%	7.70%
Interest expense - Revolving Credit Facility
Borrowings
Interest expense	$ 9,408	$ 5,549	$ 17,004	$ 11,131
Interest expense - SPV Credit Facility
Borrowings
Interest expense	4,232	5,603	8,147	10,676
Interest expense - SPV II Credit Facility
Borrowings
Interest expense	2,908	3,790	6,026	6,132
Interest expense - SPV III Credit Facility
Borrowings
Interest expense	2,774	988	4,337	988
Interest expense - SPV IV Credit Facility
Borrowings
Interest expense	5,194	0	9,937	0
Interest expense - SPV V Credit Facility
Borrowings
Interest expense	2,343	0	2,705	0
Interest expense - 2022 ABS
Borrowings
Interest expense	2,699	3,221	5,709	6,442
Interest expense - 2023 ABS
Borrowings
Interest expense	3,905	4,285	7,818	8,578
Interest expense - 2028 Notes
Borrowings
Interest expense	4,710	4,710	9,420	9,420
Interest expense - 2029 Notes
Borrowings
Interest expense	$ 3,810	$ 0	$ 7,620	$ 0