Financial Instruments and Fair Value Measurements - Summary of Other Relevant Data Related to Finance Receivables Carried at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Finance Receivables of Consolidated CFEs
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Aggregate unpaid principal balance included within finance receivables that are reported at fair value	$ 287,993	$ 361,609
Aggregate fair value of finance receivables reported at fair value	244,981	316,998
Finance Receivables of Consolidated CFEs | 90 Days or More Past Due
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unpaid principal balance of receivables within finance receivables that are reported at fair value and are on nonaccrual status	6,430	6,700
Aggregate fair value of receivables carried at fair value that are on nonaccrual status	5,436	5,921
Finance Receivables at Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Aggregate unpaid principal balance included within finance receivables that are reported at fair value	273,600	36,207
Aggregate fair value of finance receivables reported at fair value	242,592	31,672
Finance Receivables at Fair Value | 90 Days or More Past Due
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unpaid principal balance of receivables within finance receivables that are reported at fair value and are on nonaccrual status	2,529	717
Aggregate fair value of receivables carried at fair value that are on nonaccrual status	$ 1,774	$ 544