INVESTMENTS - Schedule of Amortized Cost and Fair Value on Mortgage-Backed and Asset-Backed Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 1,553,900	$ 1,466,145
Fair Value	1,506,146	1,431,028
Mortgage-backed and asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	530,106	452,405
Fair Value	509,435	435,761
Agency \| Mortgage-backed securities:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	267,310	248,661
Fair Value	251,676	235,255
Non-agency \| Mortgage-backed securities:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	81,827	64,301
Fair Value	77,767	60,580
Auto loan receivables \| Asset-backed securities:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	80,095	60,011
Fair Value	80,148	60,626
Credit card receivables \| Asset-backed securities:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	5,461	5,437
Fair Value	5,478	5,514
Other receivables \| Asset-backed securities:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	95,413	73,995
Fair Value	$ 94,366	$ 73,786