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Debt - Key Term and Carrying Value (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Debt outstanding	$ 7,518,328	$ 8,135,467
Unamortized debt costs	(43,924)	(55,863)
Unamortized debt premiums & discounts	(3,770)	(4,784)
Debt, net of unamortized debt costs	7,470,634	8,074,820
Asset Backed Securitization Term Notes
Debt Instrument [Line Items]
Debt outstanding	$ 2,579,832	2,890,467
Debt Instrument, Interest Rate, Effective Percentage	2.04%
Asset-backed securitization warehouse
Debt Instrument [Line Items]
Debt outstanding	$ 240,000	320,000
Debt Instrument, Interest Rate, Effective Percentage	6.96%
Secured Debt
Debt Instrument [Line Items]
Debt outstanding	$ 2,819,832	3,210,467
Senior Notes
Debt Instrument [Line Items]
Debt outstanding	$ 2,300,000	2,900,000
Debt Instrument, Interest Rate, Effective Percentage	2.45%
Term Notes
Debt Instrument [Line Items]
Debt outstanding	$ 1,468,496	1,080,000
Debt Instrument, Interest Rate, Effective Percentage	6.71%
Revolving credit facilities
Debt Instrument [Line Items]
Debt outstanding	$ 930,000	945,000
Debt Instrument, Interest Rate, Effective Percentage	6.71%
Unsecured Debt
Debt Instrument [Line Items]
Debt outstanding	$ 4,698,496	$ 4,925,000
Revolving Credit Facility and Second Revolving Credit Facility
Debt Instrument [Line Items]
Remaining borrowing capacity	$ 1,148,700

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