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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

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