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GOVERNMENT GRANTS (Details) $ in Millions | 1 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 31, 2014 USD ($) | Aug. 31, 2013 USD ($) | Sep. 30, 2016 USD ($) item
MOBILITY FUND GRANTS |  |  |
Number of new funds created by FCC | item |  |  | 2
Period over which a portion of the Mobility Funds is used to offset the costs of supporting the networks |  |  | 5 years
Letter of credit sub-facility |  |  |
MOBILITY FUND GRANTS |  |  |
Letters of credit posted to USAC |  |  | $ 10.6
Wholesale Mobility Funds |  |  |
MOBILITY FUND GRANTS |  |  |
Mobility Funds approved by FCC | $ 2.4 | $ 21.7 |
Wholesale Mobility Funds | U.S. Telecom |  |  |
MOBILITY FUND GRANTS |  |  |
Mobility Funds received |  |  | 9.3
Wholesale Mobility Funds | U.S. Telecom | Operating Expenses [Member] |  |  |
MOBILITY FUND GRANTS |  |  |
Grant funds used to offset fixed asset related costs |  |  | 3.1
Wholesale Mobility Funds | U.S. Telecom | Property, Plant and Equipment [Member] |  |  |
MOBILITY FUND GRANTS |  |  |
Grant funds used to offset fixed asset related costs |  |  | 5.8
Wholesale Mobility Funds | U.S. Telecom | Other long-term liabilities |  |  |
MOBILITY FUND GRANTS |  |  |
Mobility Funds received |  |  | $ 0.4

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