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INVESTMENTS - Schedule of Amortized Cost and Fair Value on Mortgage-Backed and Asset-Backed Securities (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost $ 1,454,822 $ 1,353,532
Fair Value 1,413,621 1,269,079
Mortgage-backed and asset-backed securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 429,470 387,538
Fair Value 410,999 357,030
Agency | Mortgage-backed securities:    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 223,513 194,400
Fair Value 208,684 171,531
Non-agency | Mortgage-backed securities:    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 65,608 58,722
Fair Value 61,486 51,940
Auto loan receivables | Asset-backed securities:    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 66,201 60,087
Fair Value 66,792 60,326
Credit card receivables | Asset-backed securities:    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 7,525 9,702
Fair Value 7,606 9,769
Other receivables | Asset-backed securities:    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 66,623 64,627
Fair Value $ 66,431 $ 63,464