Borrowings - 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		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Borrowings
Amortization of debt issuance costs	$ 2,508	$ 1,578	$ 6,733	$ 3,831
Total interest and other debt financing expenses	37,754	16,261	95,346	41,416
Average debt outstanding	$ 1,852,615	$ 846,873	$ 1,542,805	$ 785,129
Average stated interest rate	7.60%	6.90%	7.70%	6.40%
Interest expense - Revolving Credit Facility
Borrowings
Interest expense	$ 4,898	$ 0	$ 16,029	$ 0
Interest expense - SPV Credit Facility
Borrowings
Interest expense	7,534	6,422	18,210	17,632
Interest expense - SPV II Credit Facility
Borrowings
Interest expense	4,473	2,899	10,605	8,070
Interest expense - SPV III Credit Facility
Borrowings
Interest expense	1,322	0	2,310	0
Interest expense - SPV IV Credit Facility
Borrowings
Interest expense	2,478	0	2,478	0
Interest expense - 2022 ABS
Borrowings
Interest expense	3,221	3,221	9,663	9,663
Interest expense - 2023 ABS
Borrowings
Interest expense	4,312	755	12,890	755
Interest expense - 2028 Notes
Borrowings
Interest expense	4,710	0	14,130	0
Interest expense - 2029 Notes
Borrowings
Interest expense	2,298	0	2,298	0
Interest expense - Short-Term Borrowings
Borrowings
Interest expense	$ 0	$ 1,386	$ 0	$ 1,465