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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Redeemable Noncontrolling Interests - Narrative (Details) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Jul. 22, 2021 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Reconciliation from basic to diluted weighted average common shares outstanding |  |  |  |
Redeemable units |  | $ 85,917 | $ 92,469 | $ 72,936
Warrants value |  | 300 | 700 |
Redeemable common units |  |  |  |
Reconciliation from basic to diluted weighted average common shares outstanding |  |  |  |
Redeemable units |  | 25,823 | 37,317 | 22,640
Fair value of common units |  | 11,100 | 22,500 |
Allocated losses |  | 11,000 | 4,300 |
(Decrease) increase in book value |  |  | (500) | 4,200
Redeemable preferred units |  |  |  |
Reconciliation from basic to diluted weighted average common shares outstanding |  |  |  |
Redeemable units |  | $ 60,094 | 55,152 | $ 50,296
Percentage of preferred dividend |  | 9.00% |  |
Unpaid dividend |  | $ 11,800 | 6,800 |
Alaska communications |  |  |  |
Reconciliation from basic to diluted weighted average common shares outstanding |  |  |  |
Percentage of additional equity interest | 3.00% |  |  |
Alaska communications | Redeemable common units |  |  |  |
Reconciliation from basic to diluted weighted average common shares outstanding |  |  |  |
Redeemable units | $ 22,600 |  |  |
Alaska communications | Redeemable preferred units |  |  |  |
Reconciliation from basic to diluted weighted average common shares outstanding |  |  |  |
Redeemable units | $ 48,300 |  |  |
Percentage of preferred dividend | 9.00% |  |  |
Sacred Wind Enterprises | Redeemable common units |  |  |  |
Reconciliation from basic to diluted weighted average common shares outstanding |  |  |  |
Redeemable units |  | 14,800 |  |
Fair value of common units |  | $ 14,800 | $ 14,800 |

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