FAIR VALUE MEASUREMENTS - Fair Value Levels (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions	Dec. 31, 2025	Jan. 02, 2025	Dec. 31, 2024	Aug. 11, 2024	Dec. 31, 2023
Assets:
Loans held for sale, at fair value	$ 971,837		$ 372,286
Loans held for investment, at fair value	281,198		369,746
Individually evaluated loans	94,322		24,341
Other real estate owned	7,570		3,764
Other real estate owned, at LCM	1,286
Residuals in securitizations, at fair value	76,701		0
Servicing asset	15,358		22,062
Servicing assets, at LCM	29,564		24,195		$ 10,389
Derivative instrument	$ 737		$ 715
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other assets		Other assets
Total assets measured at fair value	$ 1,543,121		$ 898,703
Liabilities:
Equity warrants	81		133
Total liabilities measured at fair value	81		133
Carrying Amount
Cash and due from banks	4,196		6,941
Restricted cash	26,477		28,226
Interest bearing deposits in banks	279,618		346,207
Loans held for sale, at LCM	26,532		58,803
Loans held for investment, at amortized cost, net of deferred fees and costs	896,689		621,651
Federal Home Loan Bank and Federal Reserve Bank stock	4,234		3,585
Time deposits	439,805		409,251
Borrowings (including borrowings of VIEs of $127.1 million and $186.6 million, respectively)	819,888		708,041
Other Fair Value Financial Instruments
Loans HFS, at LCM	26,532		58,856
Loans HFI, at amortized cost, net of deferred fees and costs	1,012,200		668,687
Federal Home Loan Bank and Federal Reserve Bank stock	4,234		3,585
Time deposits	440,688		410,442
Borrowings	$ 827,998		720,367
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Newtek Technology Solutions, Inc.
Other Fair Value Financial Instruments
Consideration (in shares)	4.0	4.0		4.0
Value per share (in dollars per share)	$ 1.72	$ 2.05
U.S. Treasury notes
Assets:
Debt securities available-for-sale, at fair value	$ 16,829		23,916
Cash and due from banks
Other Fair Value Financial Instruments
Cash and cash equivalents	4,196		6,941
Restricted cash
Other Fair Value Financial Instruments
Cash and cash equivalents	26,477		28,226
Interest bearing deposits in banks
Other Fair Value Financial Instruments
Cash and cash equivalents	279,618		346,207
Joint Ventures and Other Investments
Assets:
Investments	47,719		57,678
Level 1
Assets:
Loans held for sale, at fair value	0		0
Loans held for investment, at fair value	0		0
Individually evaluated loans	0		0
Other real estate owned	0		0
Other real estate owned, at LCM	0
Residuals in securitizations, at fair value	0
Servicing asset	0		0
Servicing assets, at LCM	0		0
Derivative instrument	0		0
Total assets measured at fair value	23,709		23,916
Liabilities:
Equity warrants	0		0
Total liabilities measured at fair value	0		0
Other Fair Value Financial Instruments
Loans HFS, at LCM	0		0
Loans HFI, at amortized cost, net of deferred fees and costs	0		0
Federal Home Loan Bank and Federal Reserve Bank stock	0		0
Time deposits	0		0
Borrowings	0		0
Level 1 | U.S. Treasury notes
Assets:
Debt securities available-for-sale, at fair value	16,829		23,916
Level 1 | Cash and due from banks
Other Fair Value Financial Instruments
Cash and cash equivalents	4,196		6,941
Level 1 | Restricted cash
Other Fair Value Financial Instruments
Cash and cash equivalents	26,477		28,226
Level 1 | Interest bearing deposits in banks
Other Fair Value Financial Instruments
Cash and cash equivalents	279,618		346,207
Level 1 | Joint Ventures and Other Investments
Assets:
Investments	6,880		0
Level 2
Assets:
Loans held for sale, at fair value	324,467		0
Loans held for investment, at fair value	0		0
Individually evaluated loans	0		0
Other real estate owned	0		0
Other real estate owned, at LCM	0
Residuals in securitizations, at fair value	0
Servicing asset	0		0
Servicing assets, at LCM	0		0
Derivative instrument	737		715
Total assets measured at fair value	327,187		715
Liabilities:
Equity warrants	0		0
Total liabilities measured at fair value	0		0
Other Fair Value Financial Instruments
Loans HFS, at LCM	0		0
Loans HFI, at amortized cost, net of deferred fees and costs	0		0
Federal Home Loan Bank and Federal Reserve Bank stock	4,234		3,585
Time deposits	440,688		410,442
Borrowings	283,999		306,549
Level 2 | U.S. Treasury notes
Assets:
Debt securities available-for-sale, at fair value	0		0
Level 2 | Cash and due from banks
Other Fair Value Financial Instruments
Cash and cash equivalents	0		0
Level 2 | Restricted cash
Other Fair Value Financial Instruments
Cash and cash equivalents	0		0
Level 2 | Interest bearing deposits in banks
Other Fair Value Financial Instruments
Cash and cash equivalents	0		0
Level 2 | Joint Ventures and Other Investments
Assets:
Investments	1,983		0
Level 3
Assets:
Loans held for sale, at fair value	647,370		372,286
Loans held for investment, at fair value	281,198		369,746
Individually evaluated loans	94,322		24,341
Other real estate owned	7,570		3,764
Other real estate owned, at LCM	1,286
Residuals in securitizations, at fair value	76,701
Servicing asset	15,358		22,062
Servicing assets, at LCM	29,564		24,195
Derivative instrument	0		0
Total assets measured at fair value	1,192,225		874,072
Liabilities:
Equity warrants	81		133
Total liabilities measured at fair value	81		133
Other Fair Value Financial Instruments
Loans HFS, at LCM	26,532		58,856
Loans HFI, at amortized cost, net of deferred fees and costs	1,012,200		668,687
Federal Home Loan Bank and Federal Reserve Bank stock	0		0
Time deposits	0		0
Borrowings	543,999		413,818
Level 3 | U.S. Treasury notes
Assets:
Debt securities available-for-sale, at fair value	0		0
Level 3 | Cash and due from banks
Other Fair Value Financial Instruments
Cash and cash equivalents	0		0
Level 3 | Restricted cash
Other Fair Value Financial Instruments
Cash and cash equivalents	0		0
Level 3 | Interest bearing deposits in banks
Other Fair Value Financial Instruments
Cash and cash equivalents	0		0
Level 3 | Joint Ventures and Other Investments
Assets:
Investments	$ 38,856		$ 57,678