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GOVERNMENT GRANTS (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 31, 2014 | Aug. 31, 2013 | Dec. 31, 2016
MOBILITY FUND GRANTS |  |  |
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 |  |  | 19.7
Mobility funds received and recorded to date |  |  | 4.6
Wholesale Mobility Funds | U.S. Telecom | Operating Expenses |  |  |
MOBILITY FUND GRANTS |  |  |
Mobility Funds received |  |  | 13.9
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 current liabilities |  |  |
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 |  |  | $ 3.4

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