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NON-CONSOLIDATED VARIABLE INTEREST ENTITIES (VIEs) AND SERVICING ASSETS - Weighted-Averages of Key Economic Assumptions in Valuation Model (Detail) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2024
Dec. 31, 2023
Jun. 30, 2024
Sep. 30, 2023
Jun. 30, 2023
Dec. 31, 2022
NON-CONSOLIDATED VARIABLE INTEREST ENTITIES (VIEs) AND SERVICING ASSETS [Abstract]            
Carrying amount of servicing assets $ 25,403 $ 26,941 $ 25,952 $ 27,601 $ 28,034 $ 29,037
Fair value $ 42,416 $ 45,244        
Weighted-average expected life 7 years 8 months 15 days 7 years 9 months 14 days        
Constant prepayment rate 6.25% 6.27%        
Decrease in fair value due to 10% adverse change $ 847 $ 886        
Decrease in fair value due to 20% adverse change $ 1,656 $ 1,731        
Discount rate 10.71% 10.68%        
Decrease in fair value due to 10% adverse change $ 1,784 $ 1,927        
Decrease in fair value due to 20% adverse change $ 3,437 $ 3,712