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ACQUISITIONS AND DISPOSITIONS - Acquisition of Alaska Communications (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 12 Months Ended
--- | --- | ---
Jul. 22, 2021 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Business Acquisition [Line Items] |  |  |  |  |
Redeemable units |  | $ 85,917 | $ 92,469 | $ 72,936 |
Amount drawn from revolving credit facility |  | 7,300 | 15,425 | 37,321 |
Revenue |  | 762,216 | 725,745 | 602,707 |
Pre-tax income (loss) |  | 27,539 | 8,056 | 22,687 |
Transaction-related charges |  | $ 551 | 4,798 | 10,221 |
Minimum |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Useful life |  | 3 years |  |  |
Maximum |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Useful life |  | 39 years |  |  |
Customer relationships | Minimum |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Intangible assets useful lives |  | 5 years |  |  |
Customer relationships | Maximum |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Intangible assets useful lives |  | 13 years |  |  |
Trade name licenses | Minimum |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Intangible assets useful lives |  | 6 years |  |  |
Trade name licenses | Maximum |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Intangible assets useful lives |  | 15 years |  |  |
Redeemable common units |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Redeemable units |  | $ 25,823 | 37,317 | 22,640 |
Fair value of units |  | 11,100 | 22,500 |  |
Redeemable preferred units |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Redeemable units |  | $ 60,094 | $ 55,152 | 50,296 |
Percentage of preferred dividend |  | 9.00% |  |  |
Alaska communications |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Price of common share | $ 3.40 |  |  |  |
Consideration Transferred | $ 353,280 |  |  |  |
Cash consideration | 339,500 |  |  |  |
Cash acquired from acquisition | $ 11,900 |  |  |  |
Percentage of additional equity interest | 3.00% |  |  |  |
Accrued consideration | $ 1,900 |  |  |  |
Payment for purchase of Alaska Communications equity | 186,800 |  |  |  |
Repayment of Alaska Communications debt | 164,600 |  |  |  |
Mezzanine equity contribution received from Freedom 3 Investors | $ 71,500 |  |  |  |
Percentage of voting interest | 52.00% |  |  |  |
Deferred revenue from long term customer contracts | $ 81,500 |  |  |  |
Revenue |  |  |  | 110,500 |
Pre-tax income (loss) |  |  |  | 4,700 |
Transaction-related charges | 10,500 |  |  | $ 9,600 | $ 900
Alaska communications | Customer relationships |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Intangible assets | 34,900 |  |  |  |
Alaska communications | Trade name licenses |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Intangible assets | $ 9,500 |  |  |  |
Alaska communications | Trade name licenses | Minimum |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Intangible assets useful lives | 5 years |  |  |  |
Alaska communications | Trade name licenses | Maximum |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Intangible assets useful lives | 15 years |  |  |  |
Alaska communications | Telecommunication Equipment | Minimum |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Useful life | 2 years |  |  |  |
Alaska communications | Telecommunication Equipment | Maximum |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Useful life | 30 years |  |  |  |
Alaska communications | Valuation income and cost approach | Telecommunication Equipment | Minimum |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Discounted rate used for cash flows (as a percent) | 4.00% |  |  |  |
Alaska communications | Valuation income and cost approach | Telecommunication Equipment | Maximum |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Discounted rate used for cash flows (as a percent) | 14.00% |  |  |  |
Alaska communications | Redeemable common units |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Redeemable units | $ 22,600 |  |  |  |
Alaska communications | Redeemable preferred units |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Redeemable units | $ 48,300 |  |  |  |
Percentage of preferred dividend | 9.00% |  |  |  |
Alaska credit facility | Alaska communications |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Face amount of debt | $ 283,000 |  |  |  |
Debt issuance and debt discount costs | 6,600 |  |  |  |
Alaska revolving facility | Alaska communications |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Face amount of debt | 10,000 |  |  |  |
Amount drawn from revolving credit facility | 63,000 |  |  |  |
Alaska Term Facility | Alaska communications |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Face amount of debt | $ 210,000 |  |  |  |

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