OTHER BORROWINGS - Narrative (Details) $ in Thousands						1 Months Ended	12 Months Ended
	Oct. 01, 2025	Jun. 01, 2025	Dec. 15, 2024	Mar. 15, 2022	Jul. 01, 2019 USD ($)	Dec. 31, 2021 USD ($) subsidiary	Dec. 31, 2022 USD ($)	Dec. 13, 2021 USD ($)	Sep. 28, 2020 USD ($)	Dec. 06, 2019 USD ($)	Mar. 13, 2017 USD ($)
Debt Instrument [Line Items]
Federal home loan bank, advances, general debt obligations, amount of available, unused funds							$ 2,930,000
Credit arrangements for federal funds purchase							127,000
Pledged assets separately reported, loans pledged for federal reserve bank, at fair value							3,220,000
Loans pledged at federal reserve discount window available for borrowing							2,380,000
Restricted cash						$ 43,000	0
Senior Subordinated Notes
Debt Instrument [Line Items]
Redemption price, percentage				100.00%
Securitization Facilities | Balboa Capital Corporation
Debt Instrument [Line Items]
Face amount							265,100
Number of subsidiaries acquired | subsidiary						3
Restricted cash							$ 43,000
Percentage of aggregate initial note balance						10.00%
Change of control, period after closing						12 months
Subordinated notes payable due March 15, 2027 net of unamortized debt issuance cost of $551 and $681, respectively; fixed interest rate of 5.75% through March 14, 2022; variable interest rate thereafter at three-month LIBOR plus 3.616% (2027 subordinated notes) | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate							3.616%
Subordinated notes payable due March 15, 2027 net of unamortized debt issuance cost of $551 and $681, respectively; fixed interest rate of 5.75% through March 14, 2022; variable interest rate thereafter at three-month LIBOR plus 3.616% (2027 subordinated notes) | Senior Subordinated Notes
Debt Instrument [Line Items]
Face amount											$ 75,000
Interest rate, stated percentage											5.75%
Redemption price, percentage				100.00%
Subordinated notes payable due March 15, 2027 net of unamortized debt issuance cost of $551 and $681, respectively; fixed interest rate of 5.75% through March 14, 2022; variable interest rate thereafter at three-month LIBOR plus 3.616% (2027 subordinated notes) | Senior Subordinated Notes | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate				3.616%
Subordinated notes payable due December 15, 2029 net of unamortized debt issuance cost of $1,680 and $1,923, respectively; fixed interest rate of 4.25% through December 14, 2024; variable interest rate thereafter at three-month SOFR plus 2.94% (2029 subordinated notes) | Senior Subordinated Notes
Debt Instrument [Line Items]
Face amount									$ 110,000	$ 120,000
Interest rate, stated percentage									3.875%	4.25%
Subordinated notes payable due December 15, 2029 net of unamortized debt issuance cost of $1,680 and $1,923, respectively; fixed interest rate of 4.25% through December 14, 2024; variable interest rate thereafter at three-month SOFR plus 2.94% (2029 subordinated notes) | Scenario, Forecast | Senior Subordinated Notes
Debt Instrument [Line Items]
Redemption price, percentage	100.00%		100.00%
Subordinated notes payable due December 15, 2029 net of unamortized debt issuance cost of $1,680 and $1,923, respectively; fixed interest rate of 4.25% through December 14, 2024; variable interest rate thereafter at three-month SOFR plus 2.94% (2029 subordinated notes) | Scenario, Forecast | Senior Subordinated Notes | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate	3.753%		2.94%
Subordinated notes payable due May 31, 2030 net of unaccreted purchase accounting fair value adjustment of $906 and $1,028, respectively; fixed interest rate of 5.875% through May 31, 2025; variable interest rate thereafter at three-month LIBOR plus 3.63% (Bank subordinated notes) | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate							3.63%
Subordinated notes payable due May 31, 2030 net of unaccreted purchase accounting fair value adjustment of $906 and $1,028, respectively; fixed interest rate of 5.875% through May 31, 2025; variable interest rate thereafter at three-month LIBOR plus 3.63% (Bank subordinated notes) | Senior Subordinated Notes
Debt Instrument [Line Items]
Face amount					$ 75,000			$ 50,000
Interest rate, stated percentage					5.875%			5.50%
Unaccreted purchase accounting fair value adjustment					$ 1,300	$ 500
Subordinated notes payable due May 31, 2030 net of unaccreted purchase accounting fair value adjustment of $906 and $1,028, respectively; fixed interest rate of 5.875% through May 31, 2025; variable interest rate thereafter at three-month LIBOR plus 3.63% (Bank subordinated notes) | Scenario, Forecast | Senior Subordinated Notes
Debt Instrument [Line Items]
Redemption price, percentage		100.00%
Subordinated notes payable due May 31, 2030 net of unaccreted purchase accounting fair value adjustment of $906 and $1,028, respectively; fixed interest rate of 5.875% through May 31, 2025; variable interest rate thereafter at three-month LIBOR plus 3.63% (Bank subordinated notes) | Scenario, Forecast | Senior Subordinated Notes | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate		3.63%