Indebtedness - Schedule of Debt (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Total debt, gross	$ 13,030,541
Unamortized debt discount	(129,049)
Total	12,901,492	$ 10,671,928
Unused borrowing capacity	61,500
Securitized loans
Debt Instrument [Line Items]
Total	888,600
Recourse debt
Debt Instrument [Line Items]
Total debt, gross	875,100	937,144
Unamortized debt discount	(11,454)	(4,775)
Total	863,646	932,369
Unused borrowing capacity	0
Recourse debt | Line of Credit
Debt Instrument [Line Items]
Total debt, gross	384,226	$ 539,502
Unused borrowing capacity	$ 0
Weighted average interest rate	8.45%	8.89%
Recourse debt | Line of Credit | Minimum
Debt Instrument [Line Items]
Interest rate during period	3.25%
Recourse debt | Line of Credit | Maximum
Debt Instrument [Line Items]
Interest rate during period	3.75%
Recourse debt | Convertible Senior Notes Due 2026
Debt Instrument [Line Items]
Total debt, gross	$ 7,687	$ 397,642
Unused borrowing capacity	$ 0
Weighted average interest rate	0.00%	0.00%
Recourse debt | Convertible Senior Notes Due 2026 | Minimum
Debt Instrument [Line Items]
Interest rate during period	0.00%
Recourse debt | Convertible Senior Notes due 2030
Debt Instrument [Line Items]
Total debt, gross	$ 483,187	$ 0
Unused borrowing capacity	$ 0
Weighted average interest rate	4.00%	0.00%
Interest rate during period	4.00%
Non Recourse Debt
Debt Instrument [Line Items]
Total debt, gross	$ 12,155,441	$ 9,820,130
Total	12,037,846	9,739,559
Unused borrowing capacity	61,500
Non Recourse Debt | Convertible Senior Notes due 2030
Debt Instrument [Line Items]
Total	7,700
Non Recourse Debt | Senior revolving and delayed draw loans
Debt Instrument [Line Items]
Total debt, gross	2,412,400	$ 1,886,300
Unused borrowing capacity	$ 61,500
Weighted average interest rate	7.24%	7.59%
Non Recourse Debt | Senior revolving and delayed draw loans | Minimum
Debt Instrument [Line Items]
Interest rate during period	2.35%
Non Recourse Debt | Senior revolving and delayed draw loans | Maximum
Debt Instrument [Line Items]
Interest rate during period	3.10%
Non Recourse Debt | Senior non-revolving loans
Debt Instrument [Line Items]
Total debt, gross	$ 2,325,558	$ 2,226,343
Total	217,500
Unused borrowing capacity	$ 0
Weighted average interest rate	6.66%	7.07%
Non Recourse Debt | Senior non-revolving loans | Minimum
Debt Instrument [Line Items]
Interest rate during period	4.66%
Non Recourse Debt | Senior non-revolving loans | Minimum | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Interest rate during period	1.85%
Non Recourse Debt | Senior non-revolving loans | Maximum
Debt Instrument [Line Items]
Interest rate during period	6.93%
Non Recourse Debt | Senior non-revolving loans | Maximum | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Interest rate during period	2.25%
Non Recourse Debt | Subordinated revolving and delayed draw loans
Debt Instrument [Line Items]
Total debt, gross	$ 20,400	$ 146,000
Unused borrowing capacity	$ 0
Weighted average interest rate	13.62%	12.01%
Non Recourse Debt | Subordinated revolving and delayed draw loans | Minimum
Debt Instrument [Line Items]
Interest rate during period	9.10%
Non Recourse Debt | Subordinated loans
Debt Instrument [Line Items]
Total debt, gross	$ 2,691,534	$ 2,110,693
Total	152,500
Unused borrowing capacity	$ 0
Weighted average interest rate	9.36%	9.18%
Non Recourse Debt | Subordinated loans | Minimum
Debt Instrument [Line Items]
Interest rate during period	7.00%
Non Recourse Debt | Subordinated loans | Minimum | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Interest rate during period	6.50%
Non Recourse Debt | Subordinated loans | Maximum
Debt Instrument [Line Items]
Interest rate during period	10.61%
Non Recourse Debt | Subordinated loans | Maximum | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Interest rate during period	6.90%
Non Recourse Debt | Securitized loans
Debt Instrument [Line Items]
Total debt, gross	$ 4,705,549	$ 3,450,794
Unused borrowing capacity	$ 0
Weighted average interest rate	5.08%	4.61%
Non Recourse Debt | Securitized loans | Minimum
Debt Instrument [Line Items]
Interest rate during period	2.27%
Non Recourse Debt | Securitized loans | Maximum
Debt Instrument [Line Items]
Interest rate during period	6.60%
Non Recourse Debt | Floating Rate Subordinated Loans
Debt Instrument [Line Items]
Total	$ 646,400
Recourse and Nonrecourse Debt
Debt Instrument [Line Items]
Unamortized debt discount	(117,595)	$ (80,571)
Unused borrowing capacity	$ 0