INVESTMENTS - Schedule of Investments in Loans and Securities under Fair Market Adjustments (Details) - USD ($) $ in Thousands		Sep. 30, 2025	Dec. 31, 2024
Debt Securities, Available-for-Sale [Line Items]
Total investments in loans and securities	[1]	$ 887,736	$ 778,409
Investments in loans and securities
Debt Securities, Available-for-Sale [Line Items]
Total investments in loans and securities		838,978	778,409
Securitization notes
Debt Securities, Available-for-Sale [Line Items]
Total investments in loans and securities		333,166	240,273
Securitization certificates
Debt Securities, Available-for-Sale [Line Items]
Total investments in loans and securities		504,202	533,243
Other loans and receivables
Debt Securities, Available-for-Sale [Line Items]
Total investments in loans and securities		1,610	4,893
Investments in securities, under the fair value option
Debt Securities, Available-for-Sale [Line Items]
Total investments in loans and securities		48,758	0
Securitization notes
Debt Securities, Available-for-Sale [Line Items]
Total investments in loans and securities		11,597	0
Securitization certificates
Debt Securities, Available-for-Sale [Line Items]
Total investments in loans and securities		$ 37,161	$ 0

[1] Accrued interest receivable of $14.3 million, previously reported within “Fee receivables” as of December 31, 2024, has been reclassified to “Investment in loans and securities” to conform to the current period’s presentation.