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GOVERNMENT SUPPORT AND SPECTRUM MATTERS (Details) $ in Thousands | 3 Months Ended | 6 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2023 USD ($) | Jun. 30, 2022 USD ($) | Jun. 30, 2023 USD ($) item | Jun. 30, 2022 USD ($) | Apr. 30, 2023 USD ($) | Jul. 31, 2022 USD ($) | Jul. 15, 2022 USD ($) | Jul. 31, 2021 USD ($) | Jun. 30, 2021 USD ($)
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |
Revenue from contract with customer | $ 173,438 | $ 166,547 | $ 345,996 | $ 326,460 |  |  |  |  |
USF, CAF II, RDOF and Other Programs | Communication services |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |
Revenue from contract with customer | 25,415 | 17,239 | 52,394 | 33,432 |  |  |  |  |
USF, CAF II, RDOF and Other Programs | US Telecom | Communication services |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |
Revenue from contract with customer | 24,013 | 14,456 | 49,590 | 27,873 |  |  |  |  |
USF, CAF II, RDOF and Other Programs | International Telecom | Communication services |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |
Revenue from contract with customer | 1,402 | 2,783 | $ 2,804 | 5,559 |  |  |  |  |
Universal Service Fund programs |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |
Number Of Fund Disbursement Programs | item |  |  | 4 |  |  |  |  |  |
High cost support program | Communication services |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |
Revenue from contract with customer | 3,619 | 3,750 | $ 7,511 | 7,567 |  |  |  |  |
High cost support program | US Telecom | Communication services |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |
Revenue from contract with customer | 2,222 | 989 | 4,716 | 2,045 |  |  |  |  |
High cost support program | International Telecom | Communication services |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |
Revenue from contract with customer | 1,397 | 2,761 | 2,795 | 5,522 |  |  |  |  |
CAF II | Grant receivable through December 2025 |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |
Amount that has been funded or will be funded | 27,700 |  | 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 |  | 8,000 |  |  |  |  |  |
CAF II | Communication services |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |
Revenue from contract with customer | 6,815 | 6,822 | 13,630 | 13,644 |  |  |  |  |
CAF II | US Telecom | Communication services |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |
Revenue from contract with customer | 6,815 | 6,822 | 13,630 | 13,644 |  |  |  |  |
TBCP |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |
Grant funds awarded during the period |  |  | 139,000 |  |  |  |  |  |
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 |  |  |
Vija's annual USF support | Grant Receivable July 2023 Through December 2025 |  |  |  |  |  |  |  |  |
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 |  | $ 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 | 608 | 478 | $ 1,216 | 956 |  |  |  |  |
RDOF | US Telecom | Communication services |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |
Revenue from contract with customer | 608 | 478 | 1,216 | 956 |  |  |  |  |
Other Programs | Communication services |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |
Revenue from contract with customer | 14,373 | 6,189 | 30,037 | 11,265 |  |  |  |  |
Other Programs | US Telecom | Communication services |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |
Revenue from contract with customer | 14,368 | 6,167 | 30,028 | 11,228 |  |  |  |  |
Other Programs | International Telecom | Communication services |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |
Revenue from contract with customer | 5 | $ 22 | 9 | $ 37 |  |  |  |  |
Remove And Replace Program |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |
Receivable for costs expected to be reimbursed | $ 21,000 |  | $ 21,000 |  |  |  |  |  |
Remove And Replace Program | Maximum |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |
Amount of cost reimbursement allocated |  |  |  |  |  |  | $ 207,000 |  |

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