Indebtedness - Schedule of Debt (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Total debt, gross	$ 6,481,409
Debt premium	21,481
Total	6,502,890	$ 4,796,145
Unused borrowing capacity	43,102
Recourse debt
Debt Instrument [Line Items]
Total debt, gross	611,066	230,660
Unamortized debt discount	(9,382)	0
Total	601,684	230,660
Unused borrowing capacity	0
Recourse debt \| Bank Line of Credit
Debt Instrument [Line Items]
Total debt, gross	211,066	$ 230,660
Unused borrowing capacity	$ 0
Weighted average interest rate	3.40%	3.53%
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	$ 0
Unused borrowing capacity	$ 0
Weighted average interest rate	0.00%
Interest rate during period	0.00%
Non Recourse Debt
Debt Instrument [Line Items]
Total debt, gross	$ 5,870,343	4,512,331
Total	5,901,206	4,565,485
Unused borrowing capacity	43,102
Non Recourse Debt \| Senior revolving and delayed draw loans
Debt Instrument [Line Items]
Total debt, gross	1,301,600	$ 587,600
Unused borrowing capacity	$ 43,102
Weighted average interest rate	2.23%	2.85%
Non Recourse Debt \| Senior revolving and delayed draw loans \| Minimum \| LIBOR
Debt Instrument [Line Items]
Interest rate during period	1.75%
Non Recourse Debt \| Senior revolving and delayed draw loans \| Maximum \| LIBOR
Debt Instrument [Line Items]
Interest rate during period	3.25%
Non Recourse Debt \| Senior non-revolving loans
Debt Instrument [Line Items]
Total debt, gross	$ 921,038	$ 1,087,386
Unused borrowing capacity	$ 0
Weighted average interest rate	3.66%	3.68%
Non Recourse Debt \| Senior non-revolving loans \| Minimum
Debt Instrument [Line Items]
Interest rate during period	4.50%
Non Recourse Debt \| Senior non-revolving loans \| Minimum \| LIBOR
Debt Instrument [Line Items]
Interest rate during period	1.75%
Non Recourse Debt \| Senior non-revolving loans \| Maximum
Debt Instrument [Line Items]
Interest rate during period	6.50%
Non Recourse Debt \| Senior non-revolving loans \| Maximum \| LIBOR
Debt Instrument [Line Items]
Interest rate during period	2.75%
Non Recourse Debt \| Subordinated delayed draw loans
Debt Instrument [Line Items]
Total debt, gross	$ 221,464	$ 282,722
Unused borrowing capacity	$ 0
Weighted average interest rate	9.06%	8.43%
Non Recourse Debt \| Subordinated delayed draw loans \| LIBOR
Debt Instrument [Line Items]
Interest rate during period	9.00%
Non Recourse Debt \| Subordinated delayed draw loans \| Minimum
Debt Instrument [Line Items]
Interest rate during period	8.50%
Non Recourse Debt \| Subordinated delayed draw loans \| Maximum
Debt Instrument [Line Items]
Interest rate during period	9.80%
Non Recourse Debt \| Subordinated loans
Debt Instrument [Line Items]
Total debt, gross	$ 959,852	$ 668,642
Unused borrowing capacity	$ 0
Weighted average interest rate	8.46%	8.76%
Non Recourse Debt \| Subordinated loans \| Minimum
Debt Instrument [Line Items]
Interest rate during period	7.00%
Non Recourse Debt \| Subordinated loans \| Minimum \| LIBOR
Debt Instrument [Line Items]
Interest rate during period	6.75%
Non Recourse Debt \| Subordinated loans \| Maximum
Debt Instrument [Line Items]
Interest rate during period	10.00%
Non Recourse Debt \| Subordinated loans \| Maximum \| LIBOR
Debt Instrument [Line Items]
Interest rate during period
Non Recourse Debt \| Subordinated Loans
Debt Instrument [Line Items]
Total debt, gross	$ 2,466,389	$ 1,885,981
Total	124,800
Unused borrowing capacity	$ 0
Weighted average interest rate	3.59%	4.18%
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	5.31%
Recourse and Nonrecourse Debt
Debt Instrument [Line Items]
Debt premium	$ 30,863	$ 53,154

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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