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GOVERNMENT SUPPORT AND SPECTRUM MATTERS (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Jul. 31, 2022 USD ($) | Sep. 30, 2022 USD ($) | Jun. 30, 2022 USD ($) | Jun. 30, 2021 USD ($) | Sep. 30, 2020 USD ($) | Jun. 30, 2022 USD ($) item | Jun. 30, 2021 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) item | Jul. 15, 2022 USD ($) | Jul. 31, 2021 USD ($)
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total |  |  | $ 179,497 | $ 123,865 |  | $ 351,517 | $ 248,375 |  |  |  |
Communication services |  |  |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total |  |  | 171,795 | 112,964 |  | 338,338 | 223,599 |  |  |  |
USF, CAF II, RDOF and Other Programs | Communication services |  |  |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total |  |  | 17,239 | 8,292 |  | 33,432 | 16,724 |  |  |  |
USF, CAF II, RDOF and Other Programs | US Telecom | Communication services |  |  |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total |  |  | 14,456 | 3,987 |  | 27,873 | 8,314 |  |  |  |
USF, CAF II, RDOF and Other Programs | International Telecom | Communication services |  |  |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total |  |  | 2,783 | 4,305 |  | $ 5,559 | 8,410 |  |  |  |
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 not from contract with customer |  |  | 3,750 | 4,606 |  | $ 7,567 | 9,007 |  |  |  |
High cost support program | US Telecom | Communication services |  |  |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue not from contract with customer |  |  | 989 | 311 |  | 2,045 | 622 |  |  |  |
High cost support program | International Telecom | Communication services |  |  |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue not from contract with customer |  |  | 2,761 | 4,295 |  | 5,522 | 8,385 |  |  |  |
CAF II | Grant receivable through December 2025 |  |  |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |  |  |
Grants Receivable |  |  | 27,700 |  |  | 27,700 |  |  |  |  |
CAF II | Grant receivable from January 2026 through July 2028 |  |  |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |  |  |
Grants Receivable |  |  | 8,000 |  |  | 8,000 |  |  |  |  |
CAF II | Communication services |  |  |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue not from contract with customer |  |  | 6,822 | 1,899 |  | 13,644 | 3,798 |  |  |  |
CAF II | US Telecom | Communication services |  |  |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue not from contract with customer |  |  | 6,822 | 1,899 |  | 13,644 | 3,798 |  |  |  |
Network Connectivity for Eligible Communities |  |  |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |  |  |
Cumulative Grant Fund Awards |  |  | 26,200 |  |  | 26,200 |  | $ 27,900 |  |  |
Grant funds awarded during the period |  |  |  |  |  | 400 |  |  |  |  |
Grants cancelled |  |  |  |  |  | 2,100 |  |  |  |  |
Construction Obligation Completed |  |  |  |  |  | 17,100 |  |  |  |  |
Construction obligation yet to be completed |  |  |  |  |  | 9,100 |  |  |  |  |
CARES Act |  |  |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |  |  |
Cumulative Grant Fund Awards |  |  |  |  |  |  |  |  | $ 16,300 |  |
Grant funds awarded during the period |  |  |  |  |  |  |  | 2,400 |  |  |
Grant Funds Used to Offset Fixed Asset Related Costs |  |  |  |  |  |  |  | 18,400 |  |  |
Grant Funds Used to Offset Operating Expenses |  |  |  |  |  |  |  | $ 300 |  |  |
CBRS Auction |  |  |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |  |  |
Initial term of licenses |  |  |  |  | 10 years |  |  |  |  |  |
Payment for PALs |  |  |  |  | $ 20,400 |  |  |  |  |  |
Repayment for surrender of licenses |  | $ 1,100 |  |  |  |  |  |  |  |  |
Vija's annual USF support |  |  |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |  |  |
Grants Receivable |  |  |  | 16,400 |  |  | 16,400 |  |  |  | $ 10,900
Vija's annual USF support | Grant Receivable June 2022 Through June 2023 |  |  |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |  |  |
Grants Receivable |  |  | 5,500 |  |  | 5,500 |  |  |  |  |
RDOF |  |  |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |  |  |
Grant Funds Expected To Be Awarded |  |  |  |  |  |  |  |  | $ 20,100 |  |
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 |  |  | 478 |  |  | 956 |  |  |  |  |
RDOF | US Telecom | Communication services |  |  |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue from contract with customer |  |  | 478 |  |  | 956 |  |  |  |  |
Other Programs | Communication services |  |  |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue from contract with customer |  |  | 6,189 | 1,787 |  | 11,265 | 3,919 |  |  |  |
Other Programs | US Telecom | Communication services |  |  |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue from contract with customer |  |  | 6,167 | 1,777 |  | 11,228 | 3,894 |  |  |  |
Other Programs | International Telecom | Communication services |  |  |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue from contract with customer |  |  | $ 22 | $ 10 |  | $ 37 | $ 25 |  |  |  |
Fiber connectivity to certain areas within southern Apache County, Arizona |  |  |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |  |  |
Grant funds awarded during the period | $ 10,000 |  |  |  |  |  |  |  |  |  |
Remove And Replace Program | Maximum |  |  |  |  |  |  |  |  |  |  |
Mobility Fund [Line Items] |  |  |  |  |  |  |  |  |  |  |
Amount of cost reimbursement allocated |  |  |  |  |  |  |  |  |  | $ 207,000 |

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