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COMMITMENTS AND CONTINGENCIES (Details) (USD $) In Millions, unless otherwise specified | 1 Months Ended | 6 Months Ended | 0 Months Ended | 1 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Nov. 30, 2007 Lawsuit filed by CTL Minimum | Jun. 30, 2013 Pending litigation, adverse outcome | Jun. 17, 2013 Letter of credit sub-facility Amended Credit Facility | Oct. 31, 2012 Letter of credit sub-facility Amended Credit Facility | Jun. 30, 2013 Letter of credit sub-facility Amended Credit Facility | Oct. 29, 2012 Letter of credit sub-facility Amended Credit Facility
Commitments and contingencies |  |  |  |  |  |
Letters of credit issued to the USAC |  |  | $ 29.8 |  |  |
Amount of pending awards of mobility fund grants |  |  | 68.8 |  |  |
Maximum borrowing capacity |  |  | 55.0 |  |  | 55.0
Commitment fee (as a percent) |  |  | 1.75% | 1.75% |  |
Draw downs against issued letters of credit |  |  |  |  | 0 |
Damages asserted | 200.0 |  |  |  |  |
Period for which litigation proceedings and other disputes have not been the subject of discussions or other significant activity |  | 5 years |  |  |  |
Accrued contingent liability |  | $ 5.0 |  |  |  |

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