Financial Instruments and Fair Value Measurements - Summary of Gains or Losses Recorded Related to Eligible Financial Instruments (Details) - USD ($) $ in Thousands		3 Months Ended
Jan. 14, 2025	Mar. 31, 2026	Mar. 31, 2025
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Collection expenses	$ 492	$ 2,974	$ 2,638
Recoveries	(683)	(5,356)	(5,542)
Other	62	37	5
Total net loss included in "Realized and unrealized losses, net of recoveries"	$ 6,792	$ 24,683	$ 11,100
Fair Value, Asset (Liability), Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Gain (Loss) on Investments	Gain (Loss) on Investments	Gain (Loss) on Investments
Debt of securitized VIEs at fair value
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Financial Liabilities Gain (Loss)	$ (2,267)	$ (1,312)	$ 1,952
Finance Receivables at Fair Value
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Financial Assets Gain (Loss)	6,451	$ 28,340	$ 12,047
Finance Receivables Held For Sale, Net
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Financial Assets Gain (Loss)	$ 2,737

Amount of gain (loss) recognized in income from asset and liability measured at fair value on recurring basis using unobservable input (level 3).

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3).

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Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3).

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