Indebtedness - Schedule of Debt (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Total debt, net	$ 9,603,837	$ 8,399,149
Unused borrowing capacity	46,500
Recourse debt
Debt Instrument [Line Items]
Total debt, gross	951,898	905,158
Unamortized debt discount	(5,991)	(7,118)
Total debt, net	945,907	898,040
Unused borrowing capacity	0
Recourse debt | Bank Line Of Credit
Debt Instrument [Line Items]
Total debt, gross	551,898	$ 505,158
Unused borrowing capacity	$ 0
Weighted average interest rate	8.70%	6.01%
Recourse debt | Bank Line Of Credit | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Interest rate during period	3.25%
Recourse debt | 0% Convertible Senior Notes
Debt Instrument [Line Items]
Total debt, gross	$ 400,000	$ 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	$ 8,716,390	$ 7,548,047
Total debt, net	8,657,930	7,501,109
Unused borrowing capacity	46,500
Non Recourse Debt | Senior revolving and delayed draw loans
Debt Instrument [Line Items]
Total debt, gross	1,820,200	$ 1,560,002
Unused borrowing capacity	$ 46,500
Weighted average interest rate	7.39%	6.49%
Non Recourse Debt | Senior revolving and delayed draw loans | Secured Overnight Financing Rate (SOFR) | Minimum
Debt Instrument [Line Items]
Interest rate during period	2.00%
Non Recourse Debt | Senior revolving and delayed draw loans | Secured Overnight Financing Rate (SOFR) | 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	$ 2,150,880	$ 1,680,444
Total debt, net	165,700
Unused borrowing capacity	$ 0
Weighted average interest rate	6.85%	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 | Maximum
Debt Instrument [Line Items]
Interest rate during period	4.70%
Non Recourse Debt | Senior non-revolving loans | Secured Overnight Financing Rate (SOFR) | Minimum
Debt Instrument [Line Items]
Interest rate during period	1.75%
Non Recourse Debt | Senior non-revolving loans | Secured Overnight Financing Rate (SOFR) | Maximum
Debt Instrument [Line Items]
Interest rate during period	2.50%
Non Recourse Debt | Subordinated revolving and delayed draw loans
Debt Instrument [Line Items]
Total debt, gross	$ 196,000	$ 333,800
Total debt, net	150,000
Unused borrowing capacity	$ 0
Weighted average interest rate	11.43%	9.58%
Non Recourse Debt | Subordinated revolving and delayed draw loans | Secured Overnight Financing Rate (SOFR) | Minimum
Debt Instrument [Line Items]
Interest rate during period	3.50%
Non Recourse Debt | Subordinated revolving and delayed draw loans | Secured Overnight Financing Rate (SOFR) | Maximum
Debt Instrument [Line Items]
Interest rate during period	9.10%
Non Recourse Debt | Subordinated Loans
Debt Instrument [Line Items]
Total debt, gross	$ 1,748,478	$ 1,442,336
Total debt, net	134,100
Unused borrowing capacity	$ 0
Weighted average interest rate	8.94%	8.76%
Non Recourse Debt | Subordinated Loans | Minimum
Debt Instrument [Line Items]
Interest rate during period	7.00%
Non Recourse Debt | Subordinated Loans | Maximum
Debt Instrument [Line Items]
Interest rate during period	10.50%
Non Recourse Debt | Subordinated Loans | Secured Overnight Financing Rate (SOFR) | Minimum
Debt Instrument [Line Items]
Interest rate during period	6.00%
Non Recourse Debt | Subordinated Loans | Secured Overnight Financing Rate (SOFR) | Maximum
Debt Instrument [Line Items]
Interest rate during period	6.75%
Non Recourse Debt | Subordinated Loans | Floating Rate
Debt Instrument [Line Items]
Total debt, net	$ 306,100
Non Recourse Debt | Securitized loans
Debt Instrument [Line Items]
Total debt, gross	2,800,832	$ 2,531,465
Unused borrowing capacity	$ 0
Weighted average interest rate	4.10%	3.87%
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	5.75%
Unamortized debt discount, net
Debt Instrument [Line Items]
Unamortized debt discount, net	$ (58,460)	$ (46,938)