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GOVERNMENT GRANTS (Details) $ in Millions | 1 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Aug. 31, 2013 USD ($) | Jun. 30, 2015 USD ($) item | Dec. 31, 2014 USD ($)
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 | $ 10.6
Wholesale Mobility Funds |  |  |
MOBILITY FUND GRANTS |  |  |
Mobility Funds approved by FCC | $ 21.7 |  |
Wholesale Mobility Funds | U.S. Wireless |  |  |
MOBILITY FUND GRANTS |  |  |
Mobility Funds received |  | 8.1 |
Wholesale Mobility Funds | U.S. Wireless | Property, Plant and Equipment [Member] |  |  |
MOBILITY FUND GRANTS |  |  |
Mobility Funds received |  | 2.0 |
Wholesale Mobility Funds | U.S. Wireless | Other current liabilities |  |  |
MOBILITY FUND GRANTS |  |  |
Mobility Funds received |  | 2.3 |
Wholesale Mobility Funds | U.S. Wireless | Other long-term liabilities |  |  |
MOBILITY FUND GRANTS |  |  |
Mobility Funds received |  | 3.8 |
Wholesale Mobility Funds | Letter of credit sub-facility |  |  |
MOBILITY FUND GRANTS |  |  |
Letters of credit posted to USAC |  | $ 10.6 |

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