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RELATED PARTY TRANSACTIONS - Narrative part 1 (Details) |  |  |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |  |  |  |  |  |
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Sep. 20, 2024 USD ($) | May 23, 2024 USD ($) | Feb. 14, 2024 USD ($) | Dec. 18, 2023 USD ($) | Dec. 01, 2023 USD ($) | Aug. 31, 2023 USD ($) member | Aug. 21, 2023 USD ($) | Mar. 31, 2022 USD ($) | Sep. 30, 2024 USD ($) | Jun. 30, 2024 USD ($) | Sep. 30, 2023 USD ($) | Jun. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) | Jun. 30, 2024 USD ($) | Sep. 30, 2023 USD ($) | Jun. 30, 2023 USD ($) | Feb. 07, 2025 USD ($) | Jun. 27, 2024 | Feb. 05, 2024 USD ($) | Feb. 01, 2024 USD ($) loan_receivable | Dec. 31, 2023 USD ($) | May 10, 2023 USD ($) | Dec. 31, 2022 USD ($)
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Due from related parties |  |  |  |  |  |  |  |  | $ 189,000 |  |  |  | $ 189,000 |  |  |  |  |  |  |  | $ 172,000 |  |
Due to related parties and partners |  |  |  |  |  |  |  |  | 4,112,000 |  |  |  | 4,112,000 |  |  |  |  |  |  |  | 2,480,000 |  |
Accounts payable |  |  |  |  |  |  |  |  | 54,522,000 |  |  |  | 54,522,000 |  |  |  |  |  |  |  | 43,992,000 |  |
Number of loan receivables | loan_receivable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 |  |  |
Loans receivable fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4,521,000 |  |  |
Total revenues |  |  |  |  |  |  |  |  | 199,305,000 |  | $ 363,268,000 |  | 637,222,000 |  | $ 1,151,943,000 |  |  |  |  |  |  |  |
Equity investment |  |  |  |  |  |  |  |  | 3,053,000 |  |  |  | 3,053,000 |  |  |  |  |  |  |  | 2,087,000 |  |
Loans receivable, at fair value |  |  |  |  |  |  |  |  | 151,704,000 |  |  |  | 151,704,000 |  |  |  |  |  |  |  | 532,419,000 |  |
Loans receivable, at fair value |  |  |  |  |  |  |  |  | 151,704,000 |  |  |  | 151,704,000 |  |  |  |  |  |  |  | 532,419,000 |  |
Retail Industry |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans receivable, at fair value |  |  |  |  |  |  |  |  | 76,156,000 |  |  |  | 76,156,000 |  |  |  |  |  |  |  | 167,568,000 |  |
Senior notes payable |  |  |  |  |  |  |  |  | 12,451,000 |  |  |  | 12,451,000 |  |  |  |  |  |  |  | 62,808,000 |  |
FRG |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  | $ 767,404,000 |  | $ 1,038,686,000 |  | $ 2,383,350,000 |  | $ 3,259,396,000 |  |  |  |  |  |  |
Purchase of equity investments |  |  |  |  |  |  | $ 281,144,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
FRG Investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rate of equity interests |  |  |  |  |  |  | 31.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nogin Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (decrease) in inventories |  |  |  |  |  |  |  |  | 559,000 |  |  |  | 2,314,000 |  |  |  |  |  |  |  |  |  |
Loans receivable, at fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 17,980,000 |  |
Freedom VCM Holdings, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (decrease) in inventories |  |  |  |  |  |  |  |  | 3,877,000 |  |  |  | 10,636,000 |  |  |  |  |  |  |  |  |  |
Purchase of equity investments |  |  |  |  |  |  | $ 216,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans receivable, at fair value |  |  |  |  |  |  |  |  | 3,141,000 |  |  |  | 3,141,000 |  |  |  |  |  |  |  | 20,624,000 |  |
Freedom VCM Holdings, LLC | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans receivable, at fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,154,000 |  |  |  |  |  |
Freedom VCM Holdings, LLC | Equity Commitment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other commitment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 560,000,000 |
Related Party |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Due from related parties |  |  |  |  |  |  |  |  | 189,000 |  |  |  | 189,000 |  |  |  |  |  |  |  | 172,000 |  |
Due to related parties and partners |  |  |  |  |  |  |  |  | 4,112,000 |  |  |  | 4,112,000 |  |  |  |  |  |  |  | 2,480,000 |  |
Interest income, operating |  |  |  |  |  |  |  |  | 1,538,000 |  | 1,173,000 |  | 5,930,000 |  | 1,173,000 |  |  |  |  |  |  |  |
Loans receivable, at fair value |  |  |  |  |  |  |  |  | 98,292,000 |  |  |  | 98,292,000 |  |  |  |  |  |  |  | 378,768,000 |  |
Related Party | Freedom VCM |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rate of equity interests |  |  |  |  |  |  | 35.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party | Freedom VCM | Mr. Kahn And His Wife and One of Mr. Kahn’s Affiliates |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rate of equity interests |  |  |  |  |  |  | 32.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party | Freedom VCM - First Priority Security Interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rate of equity interests |  |  |  |  |  |  | 25.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party | Freedom VCM Holdings, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Management fees |  |  |  |  |  |  |  |  | 1,176,000 |  |  |  | 3,701,000 |  |  |  |  |  |  |  |  |  |
Related Party | Freedom VCM Holdings, LLC | Equity Commitment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Services and fees revenue |  |  |  |  |  |  | $ 16,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party | Freedom VCM Receivables, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire finance receivables |  |  |  |  |  |  | 58,872,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on sale of financing receivable |  |  |  |  |  |  | $ (78,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  |  |  | 19.74% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans receivable, at fair value |  |  |  |  |  |  |  |  | 9,310,000 |  |  |  | 9,310,000 |  |  |  |  |  |  |  | 42,183,000 |  |
Affiliated Entity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross proceed of furniture, fixtures and equipment sold, fee percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 15.00% |  |  |  |  |
Gross proceed of additional goods sold, fee percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 92.50% |  |  |  |  |
Affiliated Entity | Below 105% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross proceed of merchandise sold, fee percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.75% |  |  |  |  |
Gross proceed of merchandise sold, gross recovery on cost thresholds, percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 105.00% |  |  |  |  |
Affiliated Entity | Between 105.1% and 109.9% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross proceed of merchandise sold, fee percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.00% |  |  |  |  |
Affiliated Entity | Between 105.1% and 109.9% | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross proceed of merchandise sold, gross recovery on cost thresholds, percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 105.10% |  |  |  |  |
Affiliated Entity | Between 105.1% and 109.9% | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross proceed of merchandise sold, gross recovery on cost thresholds, percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 109.90% |  |  |  |  |
Affiliated Entity | 110% or More |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross proceed of merchandise sold, fee percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.25% |  |  |  |  |
Gross proceed of merchandise sold, gross recovery on cost thresholds, percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 110.00% |  |  |  |  |
Funds | Related Party |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Management fees |  |  |  |  |  |  |  |  | 6,000 |  | 1,392,000 |  | 149,000 |  | 2,086,000 |  |  |  |  |  |  |  |
Due from related parties |  |  |  |  |  |  |  |  | 189,000 |  |  |  | 189,000 |  |  |  |  |  |  |  | 172,000 |  |
Bebe's Rent | Related Party |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts payable |  |  |  |  |  |  |  |  | 3,553,000 |  |  |  | 3,553,000 |  |  |  |  |  |  |  | 2,480,000 |  |
Nogin Inc. | Related Party |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts payable |  |  |  |  |  |  |  |  | 559,000 |  |  |  | 559,000 |  |  |  |  |  |  |  |  |  |
Whitehawk | Related Party |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Management fees |  |  |  |  |  |  |  |  | 0 |  | 0 |  | $ 1,237,000 |  | 1,142,000 |  |  |  |  |  |  |  |
Loans receivable, at fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4,584,000 |  |  |
Babcock & Wilcox Enterprises, Inc. | Related Party |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service agreement, termination period |  |  |  |  |  |  |  |  |  |  |  |  | 30 days |  |  |  |  |  |  |  |  |  |
Management consulting services, duration | 1 year |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Management consulting services, monthly payments | $ 250,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Services fees |  |  |  |  |  |  |  |  |  |  |  |  | $ 750,000 |  |  |  |  |  |  |  |  |  |
Performance fee |  |  |  |  |  |  |  | $ 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Underwriting and financial advisory fees |  |  |  |  |  |  |  |  | $ 1,061,000 |  | 0 |  | $ 2,778,000 |  | 0 |  |  |  |  |  |  |  |
Maven | Related Party |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans receivable fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 98,729,000
Loans receivable, at fair value |  |  |  |  | $ 78,796,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans receivable, additional fair value disclosure |  |  |  |  |  | $ 6,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest on loan payable percentage |  |  |  |  |  | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of senior management members | member |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of equity securities |  |  |  |  | 16,576,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity securities, FV-NI, realized gain (loss) |  |  |  |  | 3,315,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans and leases receivable, gain (loss) on sales, net |  |  |  |  | $ (28,919,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of senior management members resigned | member |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest income, operating |  |  |  |  |  |  |  |  |  |  | 3,100,000 |  |  |  | 8,971,000 |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  |  | $ 0 |  |  |  | $ 0 |  |  |  |  |  |  |  |
APLD | Related Party |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans receivable fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 |  | $ 5,500,000 |  |
California Natural Resources Group, LLC | Related Party | California Natural Resources Group, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rate of equity interests |  |  |  |  |  |  |  |  | 25.00% |  |  |  | 25.00% |  |  |  |  |  |  |  |  |  |
Equity method investment, amount sold |  | $ 9,272,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity method investment, realized gain (loss) on disposal |  | 254,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity investment |  | $ 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conn’s | Related Party | Retail Industry |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans receivable, at fair value |  |  |  |  |  |  |  |  | $ 63,705,000 |  |  |  | $ 63,705,000 |  |  |  |  |  |  |  |  |  |
Loans receivable, at fair value |  |  |  | $ 108,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, floor, percentage |  |  |  | 4.80% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  |  |  | 8.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from collection of finance receivables |  |  | $ 15,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior notes payable |  |  | $ 93,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest and fee income, other loans |  |  |  |  |  |  |  |  | $ 0 |  |  |  | $ 7,538,000 |  |  |  |  |  |  |  |  |  |

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