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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (a) Through (r) (Details) |  |  |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 07, 2025 USD ($) loan | Dec. 17, 2024 USD ($) | May 03, 2024 USD ($) | Feb. 14, 2024 USD ($) | Aug. 21, 2023 USD ($) | Sep. 23, 2022 USD ($) | Dec. 20, 2021 USD ($) | Feb. 05, 2025 USD ($) | Jun. 30, 2018 | Mar. 31, 2024 USD ($) | Dec. 31, 2024 USD ($) loan_receivable loan | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Sep. 16, 2025 USD ($) | Jul. 11, 2025 USD ($) | Jun. 30, 2025 USD ($) | May 21, 2025 USD ($) | Mar. 26, 2025 USD ($) | Feb. 28, 2025 | Dec. 18, 2023 USD ($) | Mar. 31, 2023 USD ($) | Jan. 12, 2023 USD ($) | Sep. 09, 2022 USD ($)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Incentive fee payable |  |  |  |  |  |  |  |  |  |  | $ 17,143,000 | $ 16,633,000 | $ 4,297,000 |  |  |  |  |  |  |  |  |  |
Loans receivable - at fair value |  |  |  |  |  |  |  |  |  |  | 90,103,000 | 532,419,000 |  |  |  |  |  |  |  |  |  |  |
Loans receivable, at fair value |  |  |  |  |  |  |  |  |  |  | $ 90,103,000 | 532,419,000 |  |  |  |  |  |  |  |  |  |  |
Number of existing loan receivable | loan_receivable |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |
Loans receivable, fair value disclosure, maximum loss exposure |  |  |  |  |  |  |  |  |  |  | $ 59,340,000 | 368,074,000 |  |  |  |  |  |  |  |  |  |  |
Advertising costs |  |  |  |  |  |  |  |  |  |  | 7,629,000 | 10,515,000 | 10,690,000 |  |  |  |  |  |  |  |  |  |
Restricted cash |  |  |  |  |  |  |  |  |  |  | 100,475,000 | 1,875,000 |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 10,219,000 | 9,432,000 | 5,573,000 |  |  |  |  |  |  |  |  |  |
Fair value, option, aggregate differences, loans and long-term receivables |  |  |  |  |  |  |  |  |  |  | 355,901,000 | 23,463,000 |  |  |  |  |  |  |  |  |  |  |
Financing receivable, unrealized gain (loss) |  |  |  |  |  |  |  |  |  |  | (332,438,000) | (55,756,000) | 54,439,000 |  |  |  |  |  |  |  |  |  |
Financing receivable, nonaccrual |  |  |  |  |  |  |  |  |  |  | $ 21,122,000 | $ 41,236,000 |  |  |  |  |  |  |  |  |  |  |
Nonaccrual to outstanding, percent |  |  |  |  |  |  |  |  |  |  | 23.40% | 7.70% |  |  |  |  |  |  |  |  |  |  |
Financing receivable, 90 days or more past due, still accruing |  |  |  |  |  |  |  |  |  |  | $ 321,544,000 | $ 43,326,000 |  |  |  |  |  |  |  |  |  |  |
Fair value, option, credit risk, gains (losses) on assets |  |  |  |  |  |  |  |  |  |  | (323,840,000) | 6,322,000 | (58,068,000) |  |  |  |  |  |  |  |  |  |
Financing receivable, amount exceed fair value |  |  |  |  |  |  |  |  |  |  | $ 358,606,000 | 31,218,000 |  |  |  |  |  |  |  |  |  |  |
Number of loans | loan |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |
Nogin Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred, liabilities incurred |  |  | $ 37,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash |  |  | 18,670,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Measurements, Recurring |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value, option, aggregate differences, loans and long-term receivables |  |  |  |  |  |  |  |  |  |  | $ 446,004,000 | 555,882,000 |  |  |  |  |  |  |  |  |  |  |
Loans receivable |  |  |  |  |  |  |  |  |  |  | 448,709,000 | 563,637,000 |  |  |  |  |  |  |  |  |  |  |
Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior notes payable |  |  |  |  |  |  |  |  |  |  | 1,530,656,000 | 1,681,151,000 |  |  |  |  |  |  |  |  |  |  |
Outstanding balance |  |  |  |  |  |  |  |  |  |  | $ 1,530,561,000 | 1,668,021,000 |  |  |  |  |  |  |  |  |  |  |
Line of Credit | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior notes payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 52,500,000
6.375% Senior Notes due 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  |  |  |  |  |  |  | 6.375% |  |  |  |  |  |  |  |  |  |  |  |
6.375% Senior Notes due 2025 | Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior notes payable |  |  |  |  |  |  |  |  |  |  | $ 145,211,000 | 146,432,000 |  |  |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  |  |  |  |  |  |  | 6.375% |  |  |  |  |  |  |  |  |  |  |  |
Term Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding balance |  |  |  |  |  |  |  |  |  |  | $ 117,292,000 | 475,056,000 |  |  |  |  |  |  |  |  |  |  |
Term Loan | Line of Credit | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  |  | $ 148,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 49,890,000 | $ 78,296,000 |
2018 Employee Stock Purchase Plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Market value percentage |  |  |  |  |  |  |  |  | 85.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of loans | loan | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event | Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 42,838,000 | $ 13,000,000 | $ 93,067,000 | $ 24,611,000 |  |  |  |  |
Subsequent Event | 6.375% Senior Notes due 2025 | Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6.375% |  |  |  |
First Priority Security Interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans receivable, at fair value |  |  |  |  |  |  |  |  |  |  | 32,136,000 |  |  |  |  |  |  |  |  |  |  |  |
Freedom VCM Holdings, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans receivable, at fair value |  |  |  |  |  |  |  |  |  |  | 2,169,000 | 20,624,000 |  |  |  |  |  |  |  |  |  |  |
Loans receivable |  |  |  |  |  |  |  |  |  |  | 3,913,000 |  |  |  |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  | 12.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends paid, equal to the greater of net after-tax proceeds, percentage |  |  |  |  | 80.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends paid, equal to the greater of gross proceeds, percentage |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Take-private transaction, price |  |  |  |  | $ 227,296,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value |  |  |  |  |  |  |  |  |  |  | 0 | $ 232,065,000 |  |  |  |  |  |  |  |  |  |  |
Freedom VCM Holdings, LLC | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans receivable, at fair value |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,284,000 |  |  |  |  |  |  |  |  |
Freedom VCM Holdings, LLC | First Priority Security Interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans receivable, at fair value |  |  |  |  | 200,506,000 |  |  |  |  |  | $ 2,057,000 |  |  |  |  |  |  |  |  |  |  |  |
Loans receivable, fair value disclosure, loan portfolio percentage |  |  |  |  |  |  |  |  |  |  | 2.30% | 37.70% |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  |  |  |  |  |  |  | $ 224,968,000 | $ 200,506,000 |  |  |  |  |  |  |  |  |  |  |
Paid-in-kind interest |  |  |  |  |  |  |  |  |  |  | 24,462,000 |  |  |  |  |  |  |  |  |  |  |  |
Interest receivable |  |  |  |  |  |  |  |  |  |  |  | 8,889,000 |  |  |  |  |  |  |  |  |  |  |
W.S. Badcock Corporation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire finance receivables |  |  |  |  |  | $ 168,363,000 | $ 400,000,000 |  |  | $ 145,278,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Nogin Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debtor in possession commitment fund |  |  |  |  |  |  |  |  |  |  |  | 17,530,000 |  |  |  |  |  |  |  |  |  |  |
Financing commitment, additional funds |  |  | 20,170,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing commitment, payable in kind fees |  |  | 1,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing commitment, payment |  |  | $ 15,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans receivable - at fair value |  |  |  |  |  |  |  |  |  |  | 51,902,000 | 378,768,000 |  |  |  |  |  |  |  |  |  |  |
Related Party | Freedom VCM Receivables, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans receivable, at fair value |  |  |  |  |  |  |  |  |  |  | 3,913,000 | 42,183,000 |  |  |  |  |  |  |  |  |  |  |
Payments to acquire finance receivables |  |  |  |  | 58,872,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on sale of financing receivable |  |  |  |  | $ (78,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  | 19.74% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conn’s |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration received |  | $ 27,738,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value adjustment |  |  |  |  |  |  |  |  |  |  | (71,724,000) | 494,000 |  |  |  |  |  |  |  |  |  |  |
First Lien Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration received, interest |  | $ 238,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Retailer Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior notes payable |  |  |  |  |  |  |  |  |  |  | 6,082,000 | 62,808,000 |  |  |  |  |  |  |  |  |  |  |
Loans receivable, at fair value |  |  |  |  |  |  |  |  |  |  | $ 25,147,000 | $ 167,568,000 |  |  |  |  |  |  |  |  |  |  |
Loans receivable, fair value disclosure, loan portfolio percentage |  |  |  |  |  |  |  |  |  |  | 27.90% | 31.50% |  |  |  |  |  |  |  |  |  |  |
Retailer Loan | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  |  |  |  |  | $ 1,114,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on sales of loans, net | $ 1,643,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding balance | $ 6,611,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Retailer Loan | Conn’s | Related Party |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans receivable - at fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 108,000,000 |  |  |
Proceeds from collection of finance receivables |  |  |  | $ 15,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior notes payable |  |  |  | $ 93,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans receivable, at fair value |  |  |  |  |  |  |  |  |  |  | $ 19,065,000 |  |  |  |  |  |  |  |  |  |  |  |
Retailer Loan | First Lien Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans receivable, at fair value |  |  |  |  |  |  |  |  |  |  | 19,761,000 |  |  |  |  |  |  |  |  |  |  |  |
Freedom VCM Holdings, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value adjustment |  |  |  |  |  |  |  |  |  |  | (222,911,000) | $ 0 |  |  |  |  |  |  |  |  |  |  |
Other fixed income securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense: |  |  |  |  |  |  |  |  |  |  | $ 66,128,000 | $ 145,435,000 | $ 66,495,000 |  |  |  |  |  |  |  |  |  |

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