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           SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Summary of Changes in Gross Amount of Unrecognized Tax Benefits) (Details) (USD $) 
        In Thousands, unless otherwise specified  | 
        12 Months Ended | 
|---|---|
| 
           Dec. 31, 2014 
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| SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract] | |
| Beginning balance | $ 916salm_UnrecognizedTaxBenefitsGross | 
| Additions based on tax positions related to the current year | |
| Additions based on tax positions related to prior years | |
| Reductions related to tax positions of prior years | |
| Decrease due to statute expirations | (405)us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations | 
| Related interest and penalties, net of federal tax benefits | (3)us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense | 
| Ending balance | $ 508salm_UnrecognizedTaxBenefitsGross | 
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- Definition 
          Unrecognized Tax Benefits, Gross No definition available. 
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- Details 
          
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- Definition 
          Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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