Indebtedness - Schedule of Debt (Details) $ / shares in Units, $ in Thousands, shares in Millions	3 Months Ended
	Mar. 31, 2025 USD ($) $ / shares shares	Mar. 31, 2024 USD ($)	Dec. 31, 2024 USD ($) $ / shares	Oct. 31, 2024 USD ($)
Debt Instrument [Line Items]
Total debt, net	$ 13,566,073		$ 12,901,492
Unused borrowing capacity	$ 59,700
Common stock, par value (in dollars per share) | $ / shares	$ 0.0001		$ 0.0001
Debt discount amortization	$ 634	$ 0
Recourse debt
Debt Instrument [Line Items]
Total debt, gross	847,137		$ 875,100
Unamortized debt discount	(10,963)		(11,454)
Total debt, net	836,174		863,646
Unused borrowing capacity	0
Recourse debt | Bank Line Of Credit
Debt Instrument [Line Items]
Total debt, gross	358,493		$ 384,226
Unused borrowing capacity	$ 0
Weighted average interest rate	8.32%		8.45%
Line of credit, maximum borrowing capacity				$ 447,500
Recourse debt | Bank Line Of Credit | Secured Overnight Financing Rate (SOFR) | Minimum
Debt Instrument [Line Items]
Interest rate during period	3.25%
Recourse debt | Bank Line Of Credit | Secured Overnight Financing Rate (SOFR) | Maximum
Debt Instrument [Line Items]
Interest rate during period	3.75%
Recourse debt | Bank Line Of Credit | Federal Funds Rate
Debt Instrument [Line Items]
Interest rate	0.50%
Recourse debt | Bank Line Of Credit | Prime Rate
Debt Instrument [Line Items]
Interest rate	1.00%
Recourse debt | 0% Convertible Senior Notes
Debt Instrument [Line Items]
Total debt, gross	$ 5,457		$ 7,687
Unused borrowing capacity	$ 0
Weighted average interest rate	0.00%		0.00%
Recourse debt | 0% Convertible Senior Notes | Minimum
Debt Instrument [Line Items]
Interest rate during period	0.00%
Recourse debt | 4% Convertible Senior Notes
Debt Instrument [Line Items]
Total debt, gross	$ 483,187		$ 483,187
Unused borrowing capacity	$ 0
Weighted average interest rate	4.00%		4.00%
Recourse debt | 4% Convertible Senior Notes | Minimum
Debt Instrument [Line Items]
Interest rate during period	4.00%
Recourse debt | Line of Credit | Base Rate | Minimum
Debt Instrument [Line Items]
Interest rate	2.25%
Recourse debt | Line of Credit | Base Rate | Maximum
Debt Instrument [Line Items]
Interest rate	2.75%
Non Recourse Debt
Debt Instrument [Line Items]
Total debt, gross	$ 12,870,099		$ 12,155,441
Total debt, net	12,729,899		12,037,846
Unused borrowing capacity	59,700
Non Recourse Debt | Senior revolving and delayed draw loans
Debt Instrument [Line Items]
Total debt, gross	1,846,900		$ 2,412,400
Unused borrowing capacity	$ 59,700
Weighted average interest rate	6.95%		7.24%
Aggregate principal amount	$ 2,900,000
Non Recourse Debt | Senior revolving and delayed draw loans | Secured Overnight Financing Rate (SOFR) | Minimum
Debt Instrument [Line Items]
Interest rate during period	2.35%
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	$ 2,673,287		$ 2,325,558
Unused borrowing capacity	$ 0
Weighted average interest rate	6.39%		6.66%
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	6.93%
Non Recourse Debt | Senior non-revolving loans | Secured Overnight Financing Rate (SOFR) | Minimum
Debt Instrument [Line Items]
Interest rate during period	1.90%
Non Recourse Debt | Senior non-revolving loans | Secured Overnight Financing Rate (SOFR) | Maximum
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	$ 16,200		$ 20,400
Unused borrowing capacity	$ 0
Weighted average interest rate	13.42%		13.62%
Non Recourse Debt | Subordinated revolving and delayed draw loans | Secured Overnight Financing Rate (SOFR) | Minimum
Debt Instrument [Line Items]
Interest rate during period	9.10%
Non Recourse Debt | Subordinated Loans
Debt Instrument [Line Items]
Total debt, gross	$ 3,045,927		$ 2,691,534
Total debt, net	153,200
Unused borrowing capacity	$ 0
Weighted average interest rate	9.36%		9.36%
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	10.61%
Non Recourse Debt | Subordinated Loans | Secured Overnight Financing Rate (SOFR) | Minimum
Debt Instrument [Line Items]
Interest rate during period	6.50%
Non Recourse Debt | Subordinated Loans | Secured Overnight Financing Rate (SOFR) | Maximum
Debt Instrument [Line Items]
Interest rate during period	6.90%
Non Recourse Debt | Securitized loans
Debt Instrument [Line Items]
Total debt, gross	$ 5,287,785		$ 4,705,549
Unused borrowing capacity	$ 0
Weighted average interest rate	5.25%		5.08%
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 | Convertible Senior Notes
Debt Instrument [Line Items]
Total debt, net	$ 5,500
Non Recourse Debt | Floating Rate Subordinated Loans
Debt Instrument [Line Items]
Total debt, net	654,800
Non Recourse Debt | Fixed Rate Senior Non Revolving Loans
Debt Instrument [Line Items]
Total debt, net	1,300,000
Unamortized debt (discount) premium, net
Debt Instrument [Line Items]
Unamortized debt (discount) premium, net	(140,200)		$ (117,595)
Unused borrowing capacity	$ 0
Line of Credit | Secured Overnight Financing Rate (SOFR) | Minimum
Debt Instrument [Line Items]
Interest rate	3.25%
Line of Credit | Secured Overnight Financing Rate (SOFR) | Maximum
Debt Instrument [Line Items]
Interest rate	3.75%
Line of Credit | 2022 Credit Agreement, Base Rate Loans | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate	0.00%
Line of Credit | 2022 Credit Agreement, SOFR Rate Loans | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis spread on variable rate	0.00%
Line of Credit | 2022 Credit Agreement, SOFR Rate Loans | One Month, Secured Overnight Financing Rate
Debt Instrument [Line Items]
Basis spread on variable rate	0.11448%
Line of Credit | 2022 Credit Agreement, SOFR Rate Loans | Three Month, Secured Overnight Financing Rate
Debt Instrument [Line Items]
Basis spread on variable rate	0.26161%
Line of Credit | 2022 Credit Agreement, SOFR Rate Loans | Six Month, Secured Overnight Financing Rate
Debt Instrument [Line Items]
Basis spread on variable rate	0.42826%
Convertible Debt | Convertible Senior Notes
Debt Instrument [Line Items]
Total debt, net	$ 483,200
Interest rate	4.00%
Equivalent conversion price (in USD per share) | $ / shares	$ 117.91
Initial conversion rate	0.0084807
Common stock, par value (in dollars per share) | $ / shares	$ 0.0001
Conversion price (in dollars per share) | $ / shares	$ 0.0613704
Effective interest rate	0.57%
Debt discount amortization	$ 7,700
Convertible Debt | Convertible Senior Notes | Capped Call
Debt Instrument [Line Items]
Conversion price (in dollars per share) | $ / shares	$ 157.22
Payments for capped call transaction	$ 28,000
Capped call price per share (in dollars per share) | $ / shares	$ 117.91
Number of shares covered by capped calls (in shares) | shares	3.4
Convertible Debt | Convertible Senior Notes | Base Rate
Debt Instrument [Line Items]
Conversion price (in dollars per share) | $ / shares	$ 16.29
Effective interest rate	4.51%
Debt discount amortization	$ 2,100
Convertible Debt | Convertible Senior Notes | Base Rate | Capped Call
Debt Instrument [Line Items]
Conversion price (in dollars per share) | $ / shares	$ 22.37
Payments for capped call transaction	$ 38,400
Number of shares covered by capped calls (in shares) | shares	29.7