Indebtedness - Schedule of Debt (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Total debt, gross	$ 10,757,274
Unamortized debt discount	(85,346)
Total debt, net	10,671,928	$ 8,399,149
Unused borrowing capacity	76,800
Recourse debt
Debt Instrument [Line Items]
Total debt, gross	937,144	905,158
Unamortized debt discount	(4,775)	(7,118)
Total debt, net	932,369	898,040
Unused borrowing capacity	0
Recourse debt | Line of Credit
Debt Instrument [Line Items]
Total debt, gross	539,502	$ 505,158
Unused borrowing capacity	$ 0
Weighted average interest rate	8.89%	6.01%
Recourse debt | Line of Credit | SOFR
Debt Instrument [Line Items]
Interest rate during period	3.25%
Recourse debt | 0% Convertible Senior Notes
Debt Instrument [Line Items]
Total debt, gross	$ 397,642	$ 400,000
Unused borrowing capacity	$ 0
Weighted average interest rate	0.00%	0.00%
Interest rate during period	0.00%
Non Recourse Debt
Debt Instrument [Line Items]
Total debt, gross	$ 9,820,130	$ 7,548,047
Total debt, net	9,739,559	7,501,109
Unused borrowing capacity	76,800
Non Recourse Debt | Senior revolving and delayed draw loans
Debt Instrument [Line Items]
Total debt, gross	1,886,300	$ 1,560,002
Unused borrowing capacity	$ 26,800
Weighted average interest rate	7.59%	6.49%
Non Recourse Debt | Senior revolving and delayed draw loans | Minimum | SOFR
Debt Instrument [Line Items]
Interest rate during period	2.15%
Non Recourse Debt | Senior revolving and delayed draw loans | Maximum | SOFR
Debt Instrument [Line Items]
Interest rate during period	3.10%
Non Recourse Debt | Senior non-revolving loans
Debt Instrument [Line Items]
Total debt, gross	$ 2,226,343	$ 1,680,444
Total debt, net	160,600
Unused borrowing capacity	$ 0
Weighted average interest rate	7.07%	6.00%
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 | 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 | SOFR
Debt Instrument [Line Items]
Interest rate during period	2.65%
Non Recourse Debt | Subordinated delayed draw loans
Debt Instrument [Line Items]
Total debt, gross	$ 146,000	$ 333,800
Unused borrowing capacity	$ 50,000
Weighted average interest rate	12.01%	9.58%
Non Recourse Debt | Subordinated delayed draw loans | Minimum | SOFR
Debt Instrument [Line Items]
Interest rate during period	3.76%
Non Recourse Debt | Subordinated delayed draw loans | Maximum | SOFR
Debt Instrument [Line Items]
Interest rate during period	9.10%
Non Recourse Debt | Subordinated loans
Debt Instrument [Line Items]
Total debt, gross	$ 2,110,693	$ 1,442,336
Total debt, net	140,000
Unused borrowing capacity	$ 0
Weighted average interest rate	9.18%	8.76%
Non Recourse Debt | Subordinated loans | Minimum
Debt Instrument [Line Items]
Interest rate during period	7.00%
Non Recourse Debt | Subordinated loans | Minimum | SOFR
Debt Instrument [Line Items]
Interest rate during period	6.00%
Non Recourse Debt | Subordinated loans | Maximum
Debt Instrument [Line Items]
Interest rate during period	10.50%
Non Recourse Debt | Subordinated loans | Maximum | SOFR
Debt Instrument [Line Items]
Interest rate during period	6.90%
Non Recourse Debt | Subordinated Loans
Debt Instrument [Line Items]
Total debt, gross	$ 3,450,794	$ 2,531,465
Total debt, net	54,200
Unused borrowing capacity	$ 0
Weighted average interest rate	4.61%	3.87%
Non Recourse Debt | Subordinated Loans | Minimum
Debt Instrument [Line Items]
Interest rate during period	2.27%
Non Recourse Debt | Subordinated Loans | Maximum
Debt Instrument [Line Items]
Interest rate during period	6.60%
Non Recourse Debt | Subordinated Revolving and Delayed Draw Loans
Debt Instrument [Line Items]
Total debt, net	$ 100,000
Non Recourse Debt | Floating Rate Subordinated Loans
Debt Instrument [Line Items]
Total debt, net	462,100
Recourse and Nonrecourse Debt
Debt Instrument [Line Items]
Unamortized debt discount	(80,571)	$ (46,938)
Unused borrowing capacity	$ 0