FAIR VALUE MEASUREMENT - Schedule of Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023
Assets:
Investments in loans and securities	$ 760,493	$ 778,409
Liabilities:
Warrant liability	1,992	893	$ 1,342	$ 3,242
Contingent consideration liability	2,902	6,090
Accrued interest receivable	16,100	14,300
Level 1
Liabilities:
Warrant liability	1,992	890
Contingent consideration liability	0	0
Level 2
Liabilities:
Warrant liability	0	3
Contingent consideration liability	0	0
Level 3
Liabilities:
Warrant liability	0	0
Contingent consideration liability	2,902	6,090
Notes
Assets:
Investments in loans and securities	244,203	240,274
Notes | Level 1
Assets:
Investments in loans and securities	0	0
Notes | Level 2
Assets:
Investments in loans and securities	118,875	115,220
Notes | Level 3
Assets:
Investments in loans and securities	125,328	125,054
Certificates and Other loans and receivables
Assets:
Investments in loans and securities	516,289	538,135
Certificates and Other loans and receivables | Level 1
Assets:
Investments in loans and securities	0	0
Certificates and Other loans and receivables | Level 2
Assets:
Investments in loans and securities	0
Certificates and Other loans and receivables | Level 3
Assets:
Investments in loans and securities	$ 516,289	$ 538,135