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GOVERNMENT SUPPORT AND SPECTRUM MATTERS (Details) $ in Thousands |  | 1 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Jul. 15, 2022 USD ($) | Apr. 30, 2023 USD ($) | Dec. 31, 2023 USD ($) item | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Jul. 31, 2022 USD ($) | Jul. 31, 2021 USD ($) | Jun. 30, 2021 USD ($)
Mobility Fund [Line Items] |  |  |  |  |  |  |  |
Revenue from contract with customer |  |  | $ 709,880 | $ 677,953 | $ 565,541 |  |  |
Reimbursable capital expenditures |  |  | 32,871 | 7,905 | 9,700 |  |  |
Amounts accrued for reimbursable capital expenditures from government capital programs |  |  | 31,769 |  |  |  |  |
Government capital programs - Amounts received |  |  | 31,873 | 2,853 | 7,517 |  |  |
Payment for PALs |  |  |  | 1,068 |  |  |  |
USF, CAF II, RDOF and Other Programs | Communication services |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |
Revenue from contract with customer |  |  | 107,592 | 68,247 | 46,649 |  |  |
USF, CAF II, RDOF and Other Programs | US Telecom | Communication services |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |
Revenue from contract with customer |  |  | 100,771 | 60,333 | 32,742 |  |  |
USF, CAF II, RDOF and Other Programs | International Telecom | Communication services |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |
Revenue from contract with customer |  |  | $ 6,821 | 7,914 | 13,907 |  |  |
Universal Service Fund programs |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |
Number Of Fund Disbursement Programs | item |  |  | 4 |  |  |  |  |
Grant received per year |  | $ 5,500 |  |  |  |  |  |
High cost support program | Communication services |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |
Revenue from contract with customer |  |  | $ 14,831 | 12,321 | 16,356 |  |  |
High cost support program | US Telecom | Communication services |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |
Revenue from contract with customer |  |  | 9,260 | 4,459 | 2,449 |  |  |
High cost support program | International Telecom | Communication services |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |
Revenue from contract with customer |  |  | 5,571 | 7,862 | 13,907 |  |  |
CAF II | Grant receivable through December 2025 |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |
Amount that has been funded or will be funded |  |  | 27,700 |  |  |  |  |
CAF II | Grant receivable from January 2026 through July 2028 |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |
Amount that has been funded or will be funded |  |  | 8,000 |  |  |  |  |
CAF II | Communication services |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |
Revenue from contract with customer |  |  | 27,260 | 27,264 | 16,330 |  |  |
CAF II | US Telecom | Communication services |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |
Revenue from contract with customer |  |  | 27,260 | 27,264 | 16,330 |  |  |
TBCP |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |
Grant funds awarded during the period |  |  | 192,600 |  |  |  |  |
Vija's annual USF support |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |
Amount that has been funded or will be funded |  |  |  |  |  |  | $ 10,900 | $ 16,400
Vija's annual USF support | Grant Receivable July 2022 Through June 2023 |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |
Amount that has been funded or will be funded |  |  |  |  |  | $ 5,500 |  |
RDOF |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |
Grant Funds Expected To Be Awarded |  |  | $ 22,700 |  |  |  |  |
Grant Fund Term |  |  | 10 years |  |  |  |  |
Number Of Households To Receive Broadband Coverage | item |  |  | 10,000 |  |  |  |  |
RDOF | Communication services |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |
Revenue from contract with customer |  |  | $ 2,432 | 1,954 |  |  |  |
RDOF | US Telecom | Communication services |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |
Revenue from contract with customer |  |  | 2,432 | 1,954 |  |  |  |
ECF | Communication services |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |
Revenue from contract with customer |  |  | 26,346 |  |  |  |  |
ECF | US Telecom | Communication services |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |
Revenue from contract with customer |  |  | 26,346 |  |  |  |  |
RHC | Communication services |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |
Revenue from contract with customer |  |  | 11,995 | 11,018 | 5,778 |  |  |
RHC | US Telecom | Communication services |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |
Revenue from contract with customer |  |  | 11,995 | 11,018 | 5,778 |  |  |
Other Programs | Communication services |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |
Revenue from contract with customer |  |  | 24,728 | 15,690 | 8,185 |  |  |
Other Programs | US Telecom | Communication services |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |
Revenue from contract with customer |  |  | 23,478 | 15,638 | $ 8,185 |  |  |
Other Programs | International Telecom | Communication services |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |
Revenue from contract with customer |  |  | 1,250 | $ 52 |  |  |  |
Remove And Replace Program |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |
Amount that has been funded or will be funded |  |  | 47,300 |  |  |  |  |
Amount of cost reimbursement allocated | $ 207,000 |  |  |  |  |  |  |
Reimbursement period | 1 year |  |  |  |  |  |  |
Capital expenditure incurred to date | $ 17,500 |  |  |  |  |  |  |
Capital expenditure incurred within twelve months |  |  | 15,700 |  |  |  |  |
Capital expenditure accrued |  |  | 31,800 |  |  |  |  |
Proceeds from grant funds awarded |  |  | 17,100 |  |  |  |  |
Proceeds from grant funds awarded classified as operating cash inflows |  |  | 4,300 |  |  |  |  |
Proceeds from grant funds awarded classified as investing cash inflows |  |  | 12,800 |  |  |  |  |
Network Connectivity for Eligible Communities |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |
Grant funds awarded during the period |  |  | $ 34,526 |  |  |  |  |

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