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GOVERNMENT GRANTS (Details) $ in Thousands	1 Months Ended	12 Months Ended
	Aug. 31, 2018 USD ($)	Dec. 31, 2018 USD ($) item	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Government Grants
Revenue		$ 451,207
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
Mobility Funds
Government Grants
Mobility Funds received		21,100
Mobility Funds | U.S. Telecom
Government Grants
Revenue		7,200
Grant funds used to offset fixed asset related costs		13,900
High-Cost Support Program | U.S. Telecom
Government Grants
Revenue		1,200	$ 1,200	$ 1,200
High-Cost Support Program | International Telecom
Government Grants
Revenue		16,500	16,500	8,200
E-Rate, Lifeline and Rural Health Care Support Programs
Government Grants
Revenue		8,200	$ 10,200	$ 11,000
E-Rate
Government Grants
Grant Funds Awarded		$ 15,400
Tribal Bidding Credit
Government Grants
Wireless service spectrum (in Mhz) | item		600
Revenue		$ 7,400
Grant funds used to offset fixed asset related costs		5,400
Grant funds used to offset operating expenses		$ 2,000
Connect America Fund Phase II Auction
Government Grants
Grant Funds Awarded	$ 79,900
Grant fund term	10 years

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Number of fund disbursement programs to telecommunication providers.

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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.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
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