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RELATED PARTY TRANSACTIONS - Narrative Part 1 (Details) |  |  |  |  |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 05, 2024 USD ($) | Feb. 01, 2024 USD ($) loanReceivable | Dec. 01, 2023 USD ($) | Aug. 31, 2023 USD ($) member | Nov. 01, 2021 USD ($) | Aug. 25, 2021 USD ($) member | Mar. 31, 2022 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Related Party Transactions (Details) [Line Items] |  |  |  |  |  |  |  |  |  |
Accounts payable |  |  |  |  |  |  |  | $ 44,550,000 | $ 81,384,000 |
Total revenues |  |  |  |  |  |  |  | 1,643,600,000 | 1,080,670,000 | $ 1,554,698,000
Subsequent Event |  |  |  |  |  |  |  |  |  |
Related Party Transactions (Details) [Line Items] |  |  |  |  |  |  |  |  |  |
Number of loan receivables | loanReceivable |  | 1 |  |  |  |  |  |  |  |
Loans receivable fair value |  | $ 4,521,000 |  |  |  |  |  |  |  |
Related Party |  |  |  |  |  |  |  |  |  |
Related Party Transactions (Details) [Line Items] |  |  |  |  |  |  |  |  |  |
Other receivables, net, current |  |  |  |  |  |  |  | 172,000 | 1,081,000 |
Accounts payable |  |  |  |  |  |  |  | 2,731,000 |  |
Interest income |  |  |  |  |  |  |  | 3,427,000 |  |
Funds | Related Party |  |  |  |  |  |  |  |  |  |
Related Party Transactions (Details) [Line Items] |  |  |  |  |  |  |  |  |  |
Management fees |  |  |  |  |  |  |  | 1,725,000 | 6,937,000 | 5,094,000
Bebe's Rent | Related Party |  |  |  |  |  |  |  |  |  |
Related Party Transactions (Details) [Line Items] |  |  |  |  |  |  |  |  |  |
Accounts payable |  |  |  |  |  |  |  |  | 2,480,000 |
Whitehawk | Related Party |  |  |  |  |  |  |  |  |  |
Related Party Transactions (Details) [Line Items] |  |  |  |  |  |  |  |  |  |
Management fees |  |  |  |  |  |  |  | $ 1,142,000 | 1,173,000 | 1,729,000
Whitehawk | Related Party | Subsequent Event |  |  |  |  |  |  |  |  |  |
Related Party Transactions (Details) [Line Items] |  |  |  |  |  |  |  |  |  |
Loans receivable, at fair value |  | $ 4,584,000 |  |  |  |  |  |  |  |
Babcock and Wilcox | Related Party |  |  |  |  |  |  |  |  |  |
Related Party Transactions (Details) [Line Items] |  |  |  |  |  |  |  |  |  |
Service agreement, termination |  |  |  |  |  |  |  | 30 days |  |
Service fees |  |  |  |  |  |  |  | $ 750,000 |  |
Performance fee |  |  |  |  |  |  | $ 1,000,000 |  |  |
Underwriting and financial advisory fees |  |  |  |  |  |  |  | 0 | 154,000 | 15,766,000
Maven | Related Party |  |  |  |  |  |  |  |  |  |
Related Party Transactions (Details) [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 |  |  |  |  |  |  |  | 10,882,000 | 7,540,000 | 7,188,000
Total revenues |  |  |  |  |  |  |  | 0 | 2,023,000 |
APLD | Related Party |  |  |  |  |  |  |  |  |  |
Related Party Transactions (Details) [Line Items] |  |  |  |  |  |  |  |  |  |
Loans receivable fair value |  |  |  |  |  |  |  | 5,500,000 |  |
Total revenues |  |  |  |  |  |  |  | 0 | 2,321,000 | 3,513,000
Term loan interest |  |  |  |  |  |  |  | 3,150,000 |  |
APLD | Related Party | Subsequent Event |  |  |  |  |  |  |  |  |  |
Related Party Transactions (Details) [Line Items] |  |  |  |  |  |  |  |  |  |
Loans receivable fair value | $ 0 |  |  |  |  |  |  |  |  |
California Natural Resources Group LLC | Related Party |  |  |  |  |  |  |  |  |  |
Related Party Transactions (Details) [Line Items] |  |  |  |  |  |  |  |  |  |
Interest income |  |  |  |  |  |  |  |  | $ 19,000 | $ 416,000
Extended a bridge promissory note |  |  |  |  | $ 34,393,000 |  |  |  |  |
Accrued interest, percentage |  |  |  |  | 10.00% |  |  |  |  |
Guaranteed obligations |  |  |  |  |  |  |  | $ 7,375 |  |
California Natural Resources Group LLC | Related Party | California Natural Resources Group LLC |  |  |  |  |  |  |  |  |  |
Related Party Transactions (Details) [Line Items] |  |  |  |  |  |  |  |  |  |
Rate of equity interests |  |  |  |  | 25.00% |  |  |  |  |
Charah Solutions, Inc. | Related Party |  |  |  |  |  |  |  |  |  |
Related Party Transactions (Details) [Line Items] |  |  |  |  |  |  |  |  |  |
Number of senior management members | member |  |  |  |  |  | 1 |  |  |  |
Interest income |  |  |  |  |  | $ 1,122,000 |  |  |  |
Accrued interest, percentage |  |  |  |  |  | 8.00% |  |  |  |
Extended promissory note |  |  |  |  |  | $ 17,852,000 |  |  |  |
Commitment fee payable, percentage |  |  |  |  |  | 2.50% |  |  |  |

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