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BORROWINGS - Notes Payable (Narrative) (Details) - USD ($) $ in Thousands | 1 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2024 | May 31, 2023 | Aug. 31, 2021 | Mar. 31, 2021 | Mar. 31, 2024 | Dec. 31, 2023
Debt Instrument [Line Items] |  |  |  |  |  |
Aggregate Principal Amount | $ 555,238 |  |  |  |  | $ 419,838
Notes Payable |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Aggregate Principal Amount | $ 463,738 |  |  |  | $ 337,238 |
Notes Payable | 5.00% Notes due 2026 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest Rate | 5.00% |  |  | 5.00% | 5.00% |
Aggregate Principal Amount | $ 127,938 |  |  | $ 127,900 | $ 127,938 |
Proceeds from issuance of long-term debt |  |  |  | 123,800 |  |
Borrowings outstanding at cost |  |  |  | $ 4,100 |  |
Notes payable, fair value disclosure | $ 127,300 |  |  |  | $ 123,900 |
Notes Payable | 4.875% Notes due 2028 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest Rate | 4.875% |  | 4.875% |  | 4.875% |
Aggregate Principal Amount | $ 134,550 |  | $ 134,600 |  | $ 134,550 |
Proceeds from issuance of long-term debt |  |  | 131,300 |  |  |
Borrowings outstanding at cost |  |  | $ 3,300 |  |  |
Notes payable, fair value disclosure | $ 127,300 |  |  |  | $ 123,700 |
Notes Payable | 8.00% 2028 Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest Rate | 8.00% | 8.00% |  |  | 8.00% |
Aggregate Principal Amount | $ 74,750 | $ 74,800 |  |  | $ 74,750 |
Proceeds from issuance of long-term debt |  | 72,300 |  |  |  |
Borrowings outstanding at cost |  | $ 2,500 |  |  |  |
Notes payable, fair value disclosure | $ 77,100 |  |  |  | $ 77,300 |
Notes Payable | 7.875% 2030 Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest Rate | 7.875% |  |  |  |  |
Aggregate Principal Amount | $ 126,500 |  |  |  |  |
Proceeds from issuance of long-term debt | 122,400 |  |  |  |  |
Borrowings outstanding at cost | 4,100 |  |  |  |  |
Notes payable, fair value disclosure | $ 128,400 |  |  |  |  |

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