Indebtedness - Schedule of Debt (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Total debt, net	$ 8,926,504	$ 8,399,149
Unused borrowing capacity	83,645
Recourse debt
Debt Instrument [Line Items]
Total debt, gross	952,253	905,158
Unamortized debt discount	(6,558)	(7,118)
Total debt, net	945,695	898,040
Unused borrowing capacity	1,345
Recourse debt \| Bank Line Of Credit
Debt Instrument [Line Items]
Total debt, gross	552,253	$ 505,158
Unused borrowing capacity	$ 1,345
Weighted average interest rate	8.64%	6.01%
Recourse debt \| Bank Line Of Credit \| LIBOR
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	$ 8,026,203	$ 7,548,047
Total debt, net	7,980,809	7,501,109
Unused borrowing capacity	82,300
Non Recourse Debt \| Senior revolving and delayed draw loans
Debt Instrument [Line Items]
Total debt, gross	1,438,001	$ 1,560,002
Unused borrowing capacity	$ 77,000
Weighted average interest rate	6.93%	6.49%
Non Recourse Debt \| Senior revolving and delayed draw loans \| LIBOR \| 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) Overnight Index Swap Rate \| Minimum
Debt Instrument [Line Items]
Interest rate during period	3.10%
Non Recourse Debt \| Senior non-revolving loans
Debt Instrument [Line Items]
Total debt, gross	$ 2,230,023	$ 1,680,444
Unused borrowing capacity	$ 0
Weighted average interest rate	6.51%	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 \| LIBOR \| Minimum
Debt Instrument [Line Items]
Interest rate during period	1.75%
Non Recourse Debt \| Senior non-revolving loans \| LIBOR \| Maximum
Debt Instrument [Line Items]
Interest rate during period	2.50%
Non Recourse Debt \| Senior non-revolving loans \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Minimum
Debt Instrument [Line Items]
Interest rate during period	1.85%
Non Recourse Debt \| Senior non-revolving loans \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Maximum
Debt Instrument [Line Items]
Interest rate during period	2.25%
Non Recourse Debt \| Subordinated revolving and delayed draw loans (7)
Debt Instrument [Line Items]
Total debt, gross	$ 176,600	$ 333,800
Unused borrowing capacity	$ 5,300
Weighted average interest rate	11.12%	9.58%
Non Recourse Debt \| Subordinated revolving and delayed draw loans (7) \| LIBOR \| Minimum
Debt Instrument [Line Items]
Interest rate during period	3.50%
Non Recourse Debt \| Subordinated revolving and delayed draw loans (7) \| LIBOR \| Maximum
Debt Instrument [Line Items]
Interest rate during period	9.10%
Non Recourse Debt \| Subordinated Loans
Debt Instrument [Line Items]
Total debt, gross	$ 1,678,743	$ 1,442,336
Total debt, net	131,200
Unused borrowing capacity	$ 0
Weighted average interest rate	8.89%	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 \| LIBOR \| Minimum
Debt Instrument [Line Items]
Interest rate during period	6.75%
Non Recourse Debt \| Subordinated Loans \| Floating Rate
Debt Instrument [Line Items]
Total debt, net	$ 224,800
Non Recourse Debt \| Securitized loans
Debt Instrument [Line Items]
Total debt, gross	2,502,836	$ 2,531,465
Unused borrowing capacity	$ 0
Weighted average interest rate	3.88%	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	5.31%
Unamortized debt discount, net
Debt Instrument [Line Items]
Unamortized debt discount, net	$ (45,394)	$ (46,938)

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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