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GOVERNMENT GRANTS (Details)	1 Months Ended	12 Months Ended
	Aug. 31, 2018 USD ($)	Dec. 31, 2019 USD ($) item	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Universal Service Fund programs
Government Grants
Number of fund disbursement programs | item		4
Universal Service Fund programs | HURRICANES IRMA AND MARIA
Government Grants
Revenue			$ 15,500,000
Mobility Funds
Government Grants
Mobility Funds received		$ 21,100,000
Mobility Funds | US Telecom
Government Grants
Grant funds used to offset fixed asset related costs		7,200,000
Grant funds used to offset operating expenses		13,900,000
High-Cost Support Program | HURRICANES IRMA AND MARIA
Government Grants
Revenue			15,500,000
High-Cost Support Program | US Telecom
Government Grants
Revenue		1,200,000	1,200,000	$ 1,200,000
High-Cost Support Program | International Telecom
Government Grants
Revenue		16,400,000	16,500,000	16,500,000
E-Rate, Lifeline and Rural Health Care Support Programs
Government Grants
Revenue		6,100,000	8,200,000	$ 10,200,000
E-Rate
Government Grants
Grant Funds Awarded		15,800,000
Proceeds from completion of construction		5,400,000
Reimbursement of capital expenditures		3,100,000
Offsetting operating activities		$ 2,300,000
Tribal Bidding Credit
Government Grants
Wireless service spectrum (in Mhz)		600
Revenue			$ 7,400,000
Grant funds used to offset fixed asset related costs		$ 5,400,000
Grant funds used to offset operating expenses		2,000,000.0
Connect America Fund Phase II Auction
Government Grants
Revenue		$ 5,300,000
Grant Funds Awarded	$ 79,900,000
Grant fund term	10 years

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Amount of Mobility Funds received by the entity since inception of the grant.

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Number of fund disbursement programs to telecommunication providers.

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The amount of proceeds received from completion of constructions.

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Represents the wireless service spectrum band.

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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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