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GOVERNMENT GRANTS (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Aug. 31, 2018 USD ($) | Jun. 30, 2020 USD ($) | Jun. 30, 2019 USD ($) | Jun. 30, 2020 USD ($) item MW | Jun. 30, 2019 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Government Grants |  |  |  |  |  |  |
Revenue |  | $ 109,098 | $ 107,721 | $ 220,004 | $ 211,021 |  |
Universal Service Fund programs |  |  |  |  |  |  |
Government Grants |  |  |  |  |  |  |
Number of fund disbursement programs | item |  |  |  | 4 |  |  |
High-Cost Support Program | US Telecom |  |  |  |  |  |  |
Government Grants |  |  |  |  |  |  |
Revenue |  | 300 | 300 | $ 600 | 600 |  |
High-Cost Support Program | International Telecom |  |  |  |  |  |  |
Government Grants |  |  |  |  |  |  |
Revenue |  | 4,100 | 4,100 | 8,200 | 8,200 |  |
E-Rate, Lifeline and Rural Health Care Support Programs |  |  |  |  |  |  |
Government Grants |  |  |  |  |  |  |
Revenue |  | 2,200 | 1,600 | 4,400 | 3,200 |  |
E-Rate |  |  |  |  |  |  |
Government Grants |  |  |  |  |  |  |
Grant Funds Awarded |  |  |  | $ 15,800 |  |  |
Proceeds from completion of construction |  |  |  |  |  | $ 5,400 |
Reimbursement of capital expenditures |  |  |  |  |  | 3,100 |
Offsetting operating activities |  |  |  |  |  | $ 2,300 |
Tribal Bidding Credit |  |  |  |  |  |  |
Government Grants |  |  |  |  |  |  |
Wireless service spectrum (in Mhz) | MW |  |  |  | 600 |  |  |
Revenue |  |  |  |  |  |  | $ 7,400
Grant funds used to offset fixed asset related costs |  | 5,400 |  | $ 5,400 |  |  |
Grant funds used to offset operating expenses |  | 2,000 |  | 2,000 |  |  |
Connect America Fund Phase II Auction |  |  |  |  |  |  |
Government Grants |  |  |  |  |  |  |
Revenue |  | $ 1,900 | $ 1,500 | $ 3,800 | $ 1,500 |  |
Grant Funds Awarded | $ 79,900 |  |  |  |  |  |
Grant fund term | 10 years |  |  |  |  |  |

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