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ACQUISITIONS AND DISPOSITIONS: (Details Textual) (USD $) | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |  | 12 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Dec. 31, 2012 | Jun. 30, 2013 Reach Media [Member] Previous Holding Percentage [Member] | Sep. 30, 2013 Reach Media [Member] Current Holding Percentage [Member] | Dec. 31, 2012 LMA | Sep. 30, 2013 Columbus Ohio Radio Stations [Member]
Noncontrolling Interest, Ownership Percentage by Parent |  |  |  |  |  | 53.50% | 80.00% |  |
Business Acquisition, Period Results Included in Combined Entity |  |  |  |  |  |  |  | 18 months |
Proceeds from Sale of Productive Assets, Total |  |  |  |  |  |  |  |  | $ 4,000,000
Payments to Acquire Additional Interest in Subsidiaries |  |  |  |  | 2,000,000 |  |  |  |
Disposal Group Including Discontinued Operation, Gain (Loss) on Sale of Assets | $ 0 | $ 0 | $ 893,000 | $ 0 |  |  |  |  |

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