Financial Instruments and Fair Value Measurements - Summary of Gains or Losses Recorded Related to Eligible Financial Instruments (Details) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
Jan. 14, 2025	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collection expenses	$ 492	$ 2,825	$ 2,495	$ 5,799	$ 5,133
Recoveries	(683)	(5,056)	(5,233)	(10,411)	(10,775)
Other	62	(76)	10	(41)	15
Total net loss included in "Realized and unrealized losses, net of recoveries"	$ 6,792	$ 10,663	$ 19,500	$ 35,346	$ 30,600
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	Gain (Loss) on Investments	Gain (Loss) on Investments
Finance Receivables at Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Assets Gain (Loss)	$ 6,451	$ 19,182	$ 23,155	$ 47,522	$ 35,202
Finance Receivables Held For Sale, Net
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Assets Gain (Loss)	2,737
Debt of securitized VIEs at fair value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Liabilities Gain (Loss)	$ (2,267)	$ (6,212)	$ (927)	$ (7,523)	$ 1,025

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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