Indebtedness - Schedule of Debt (Details) $ / shares in Units, $ in Thousands, shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($) $ / shares	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) $ / shares shares	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($) $ / shares	Oct. 31, 2024 USD ($)
Debt Instrument [Line Items]
Total debt, net	$ 14,627,043		$ 14,627,043		$ 12,901,492
Unused borrowing capacity	$ 87,300		$ 87,300
Common stock, par value (in dollars per share) | $ / shares	$ 0.0001		$ 0.0001		$ 0.0001
Debt discount amortization	$ 513	$ 0	$ 1,800	$ 0
Recourse debt
Debt Instrument [Line Items]
Total debt, gross	807,854		807,854		$ 875,100
Unamortized debt discount	(9,953)		(9,953)		(11,454)
Total debt, net	797,901		797,901		863,646
Unused borrowing capacity	0		0
Recourse debt | Bank Line Of Credit
Debt Instrument [Line Items]
Total debt, gross	319,210		319,210		$ 384,226
Unused borrowing capacity	$ 0		$ 0
Weighted average interest rate	8.07%		8.07%		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%		0.50%
Recourse debt | Bank Line Of Credit | Prime Rate
Debt Instrument [Line Items]
Interest rate	1.00%		1.00%
Recourse debt | 0% Convertible Senior Notes
Debt Instrument [Line Items]
Total debt, gross	$ 5,457		$ 5,457		$ 7,687
Unused borrowing capacity	$ 0		$ 0
Weighted average interest rate	0.00%		0.00%		0.00%
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		$ 483,187
Unused borrowing capacity	$ 0		$ 0
Weighted average interest rate	4.00%		4.00%		4.00%
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%		2.25%
Recourse debt | Line of Credit | Base Rate | Maximum
Debt Instrument [Line Items]
Interest rate	2.75%		2.75%
Non Recourse Debt
Debt Instrument [Line Items]
Total debt, gross	$ 13,990,202		$ 13,990,202		$ 12,155,441
Total debt, net	13,829,142		13,829,142		12,037,846
Unused borrowing capacity	87,300		87,300
Non Recourse Debt | Senior revolving and delayed draw loans
Debt Instrument [Line Items]
Total debt, gross	1,897,800		1,897,800		$ 2,412,400
Unused borrowing capacity	$ 87,300		$ 87,300
Weighted average interest rate	6.97%		6.97%		7.24%
Aggregate principal amount	$ 2,900,000		$ 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	2,683,400		$ 2,683,400		$ 2,325,558
Unused borrowing capacity	$ 0		$ 0
Weighted average interest rate	6.29%		6.29%		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	$ 35,400		$ 35,400		$ 20,400
Unused borrowing capacity	$ 0		$ 0
Weighted average interest rate	13.35%		13.35%		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	$ 3,245,172		$ 3,245,172		$ 2,691,534
Total debt, net	158,900		158,900
Unused borrowing capacity	$ 0		$ 0
Weighted average interest rate	9.48%		9.48%		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			10.75%
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	$ 6,128,430		$ 6,128,430		$ 4,705,549
Unused borrowing capacity	$ 0		$ 0
Weighted average interest rate	5.40%		5.40%		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		$ 5,500
Non Recourse Debt | Fixed Rate Senior Non Revolving Loans
Debt Instrument [Line Items]
Total debt, net	1,700,000		1,700,000
Non Recourse Debt | Floating Rate Subordinated Loans
Debt Instrument [Line Items]
Total debt, net	671,900		671,900
Unamortized debt (discount) premium, net
Debt Instrument [Line Items]
Unamortized debt (discount) premium, net	(161,060)		(161,060)		$ (117,595)
Unused borrowing capacity	$ 0		$ 0
Line of Credit | Secured Overnight Financing Rate (SOFR) | Minimum
Debt Instrument [Line Items]
Interest rate	3.25%		3.25%
Line of Credit | Secured Overnight Financing Rate (SOFR) | Maximum
Debt Instrument [Line Items]
Interest rate	3.75%		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		$ 483,200
Interest rate	4.00%		4.00%
Equivalent conversion price (in USD per share) | $ / shares	$ 117.91		$ 117.91
Initial conversion rate			0.0084807
Common stock, par value (in dollars per share) | $ / shares	$ 0.0001		$ 0.0001
Effective interest rate	0.57%		0.57%
Debt discount amortization			$ 7,700
Conversion price (in dollars per share) | $ / shares	$ 0.0613704		$ 0.0613704
Convertible Debt | Convertible Senior Notes | Capped Call
Debt Instrument [Line Items]
Payments for capped call transaction			$ 28,000
Capped call price per share (in dollars per share) | $ / shares			$ 117.91
Conversion price (in dollars per share) | $ / shares	$ 157.22		$ 157.22
Number of shares covered by capped calls (in shares) | shares			3.4
Convertible Debt | Convertible Senior Notes | Base Rate
Debt Instrument [Line Items]
Effective interest rate	4.51%		4.51%
Debt discount amortization			$ 3,100
Conversion price (in dollars per share) | $ / shares	$ 16.29		$ 16.29
Convertible Debt | Convertible Senior Notes | Base Rate | Capped Call
Debt Instrument [Line Items]
Payments for capped call transaction			$ 38,400
Conversion price (in dollars per share) | $ / shares	$ 22.37		$ 22.37
Number of shares covered by capped calls (in shares) | shares			29.7