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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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Represents the amount of grant funds awarded.

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Represents the amount of grants received for the construction of assets which are recognized as a reduction of the cost of fixed assets, a reduction of depreciation expense over the useful lives of the assets, and as a reduction of capital expenditures.

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Represents the amount of grants received that offset operating costs.

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Number of fund disbursement programs to telecommunication providers.

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The amount of offsetting operating activities.

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The amount of proceeds received from completion of constructions.

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Amount received as reimbursement of capital expenditures.

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Represents the wireless service spectrum band.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

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