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Debt - Key Term and Carrying Value (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Debt outstanding	$ 7,816,667	$ 8,135,467
Unamortized debt costs	(47,680)	(55,863)
Unamortized debt premiums & discounts	(3,990)	(4,784)
Debt, net of unamortized debt costs	7,764,997	8,074,820
Secured Debt Financings
Debt Instrument [Line Items]
Debt outstanding	2,952,543	3,210,467
Asset-backed securitization ("ABS") term instruments
Debt Instrument [Line Items]
Debt outstanding	$ 2,657,543	2,890,467
Debt instrument, interest rate, effective percentage	2.04%
Asset-backed securitization warehouse
Debt Instrument [Line Items]
Debt outstanding	$ 295,000	320,000
Debt instrument, interest rate, effective percentage	6.92%
Unsecured Debt Financings
Debt Instrument [Line Items]
Debt outstanding	$ 4,864,124	4,925,000
Senior notes
Debt Instrument [Line Items]
Debt outstanding	$ 2,300,000	2,900,000
Debt instrument, interest rate, effective percentage	2.45%
Term loan facility
Debt Instrument [Line Items]
Debt outstanding	$ 1,504,124	1,080,000
Debt instrument, interest rate, effective percentage	6.67%
Revolving credit facility
Debt Instrument [Line Items]
Debt outstanding	$ 1,060,000	$ 945,000
Debt instrument, interest rate, effective percentage	6.67%

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