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FAIR VALUE MEASUREMENTS - Summary of Activity In Marketable Securities (Details) - Residual interest securities - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Change in fair value $ 133   $ 10,368
Level 3      
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Beginning Balance 34,506 $ 11,952 11,952
Purchases 12,333 16,527  
Sales   (872)  
Principal payments (9,430) (1,002)  
Change in fair value 897 870  
Ending Balance $ 38,306 $ 27,475 $ 34,506