| 
           ACQUISITIONS AND RECENT TRANSACTIONS (Schedule of Dividend Distributions) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified 
         | 
        12 Months Ended | 
        0 Months Ended | 
      
      
        | 
           Dec. 31, 2014 
         | 
        
           Dec. 31, 2013 
         | 
        
           Dec. 31, 2012 
         | 
        
           Mar. 06, 2014 
         | 
        
           Mar. 18, 2013 
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           May 27, 2014 
         | 
        
           May 30, 2013 
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           Sep. 02, 2014 
         | 
        
           Sep. 12, 2013 
         | 
        
           Dec. 02, 2014 
         | 
        
           Nov. 20, 2013 
         | 
      
      
        | Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] | 
         
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        | Class A and Class B common stock, dividend declared per share, paid | 
        
$ 0.24us-gaap_CommonStockDividendsPerShareCashPaid
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$ 0.21us-gaap_CommonStockDividendsPerShareCashPaid
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$ 0.14us-gaap_CommonStockDividendsPerShareCashPaid
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        | Class A and Class B common stock, dividend paid | 
        
$ 6,183us-gaap_PaymentsOfDividendsCommonStock
 | 
        
$ 5,158us-gaap_PaymentsOfDividendsCommonStock
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$ 3,412us-gaap_PaymentsOfDividendsCommonStock
 | 
         
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        | First Quarter Dividend [Member] | 
         
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        | Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] | 
         
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        | Class A and Class B common stock, dividend declared date | 
         
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 | 
        Mar.  06,  2014
 | 
        Mar. 18,  2013
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        | Class A and Class B common stock, record date | 
         
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        Mar. 17,  2014
 | 
        Mar. 25,  2013
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        | Class A and Class B common stock, payment date | 
         
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        Mar. 31,  2014
 | 
        Apr.  01,  2013
 | 
         
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 | 
         
 | 
         
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        | Class A and Class B common stock, dividend declared per share | 
         
 | 
         
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 | 
        
$ 0.0575us-gaap_CommonStockDividendsPerShareDeclared / us-gaap_DividendsAxis = salm_FirstQuarterDividendMember
 | 
        
$ 0.0500us-gaap_CommonStockDividendsPerShareDeclared / us-gaap_DividendsAxis = salm_FirstQuarterDividendMember
 | 
         
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 | 
         
 | 
         
 | 
         
 | 
         
 | 
      
      
        | Class A and Class B common stock, dividend declared per share, paid | 
         
 | 
         
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 | 
        
$ 0.0575us-gaap_CommonStockDividendsPerShareCashPaid / us-gaap_DividendsAxis = salm_FirstQuarterDividendMember
 | 
        
$ 0.0500us-gaap_CommonStockDividendsPerShareCashPaid / us-gaap_DividendsAxis = salm_FirstQuarterDividendMember
 | 
         
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 | 
         
 | 
         
 | 
         
 | 
         
 | 
      
      
        | Class A and Class B common stock, dividend paid | 
         
 | 
         
 | 
         
 | 
        
1,444us-gaap_PaymentsOfDividendsCommonStock / us-gaap_DividendsAxis = salm_FirstQuarterDividendMember
 | 
        
1,234us-gaap_PaymentsOfDividendsCommonStock / us-gaap_DividendsAxis = salm_FirstQuarterDividendMember
 | 
         
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        | Second Quarter Dividend [Member] | 
         
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        | Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
      
      
        | Class A and Class B common stock, dividend declared date | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
        May 27,  2014
 | 
        May 30,  2013
 | 
         
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 | 
         
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        | Class A and Class B common stock, record date | 
         
 | 
         
 | 
         
 | 
         
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 | 
        Jun. 16,  2014
 | 
        Jun. 14,  2013
 | 
         
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        | Class A and Class B common stock, payment date | 
         
 | 
         
 | 
         
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 | 
        Jun. 30,  2014
 | 
        Jun. 28,  2013
 | 
         
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 | 
         
 | 
         
 | 
      
      
        | Class A and Class B common stock, dividend declared per share | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
        
$ 0.0600us-gaap_CommonStockDividendsPerShareDeclared / us-gaap_DividendsAxis = salm_SecondQuarterDividendMember
 | 
        
$ 0.0500us-gaap_CommonStockDividendsPerShareDeclared / us-gaap_DividendsAxis = salm_SecondQuarterDividendMember
 | 
         
 | 
         
 | 
         
 | 
         
 | 
      
      
        | Class A and Class B common stock, dividend declared per share, paid | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
        
$ 0.0600us-gaap_CommonStockDividendsPerShareCashPaid / us-gaap_DividendsAxis = salm_SecondQuarterDividendMember
 | 
        
$ 0.0500us-gaap_CommonStockDividendsPerShareCashPaid / us-gaap_DividendsAxis = salm_SecondQuarterDividendMember
 | 
         
 | 
         
 | 
         
 | 
         
 | 
      
      
        | Class A and Class B common stock, dividend paid | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
        
1,514us-gaap_PaymentsOfDividendsCommonStock / us-gaap_DividendsAxis = salm_SecondQuarterDividendMember
 | 
        
1,240us-gaap_PaymentsOfDividendsCommonStock / us-gaap_DividendsAxis = salm_SecondQuarterDividendMember
 | 
         
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        | Third Quarter Dividend [Member] | 
         
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        | Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
      
      
        | Class A and Class B common stock, dividend declared date | 
         
 | 
         
 | 
         
 | 
         
 | 
         
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 | 
        Sep.  02,  2014
 | 
        Sep. 12,  2013
 | 
         
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 | 
      
      
        | Class A and Class B common stock, record date | 
         
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 | 
         
 | 
         
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 | 
        Sep. 16,  2014
 | 
        Sep. 26,  2013
 | 
         
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        | Class A and Class B common stock, payment date | 
         
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 | 
         
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 | 
        Sep. 30,  2014
 | 
        Oct.  04,  2013
 | 
         
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 | 
      
      
        | Class A and Class B common stock, dividend declared per share | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
        
$ 0.0625us-gaap_CommonStockDividendsPerShareDeclared / us-gaap_DividendsAxis = salm_ThirdQuarterDividendMember
 | 
        
$ 0.0525us-gaap_CommonStockDividendsPerShareDeclared / us-gaap_DividendsAxis = salm_ThirdQuarterDividendMember
 | 
         
 | 
         
 | 
      
      
        | Class A and Class B common stock, dividend declared per share, paid | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
        
$ 0.0625us-gaap_CommonStockDividendsPerShareCashPaid / us-gaap_DividendsAxis = salm_ThirdQuarterDividendMember
 | 
        
$ 0.0525us-gaap_CommonStockDividendsPerShareCashPaid / us-gaap_DividendsAxis = salm_ThirdQuarterDividendMember
 | 
         
 | 
         
 | 
      
      
        | Class A and Class B common stock, dividend paid | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
        
1,579us-gaap_PaymentsOfDividendsCommonStock / us-gaap_DividendsAxis = salm_ThirdQuarterDividendMember
 | 
        
1,308us-gaap_PaymentsOfDividendsCommonStock / us-gaap_DividendsAxis = salm_ThirdQuarterDividendMember
 | 
         
 | 
         
 | 
      
      
        | Fourth Quarter Dividend [Member] | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
      
      
        | Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
      
      
        | Class A and Class B common stock, dividend declared date | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
        Dec.  02,  2014
 | 
        Nov. 20,  2013
 | 
      
      
        | Class A and Class B common stock, record date | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
        Dec. 15,  2014
 | 
        Dec. 10,  2013
 | 
      
      
        | Class A and Class B common stock, payment date | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
        Dec. 29,  2014
 | 
        Dec. 27,  2013
 | 
      
      
        | Class A and Class B common stock, dividend declared per share | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
        
$ 0.0650us-gaap_CommonStockDividendsPerShareDeclared / us-gaap_DividendsAxis = salm_FourthQuarterDividendMember
 | 
        
$ 0.0550us-gaap_CommonStockDividendsPerShareDeclared / us-gaap_DividendsAxis = salm_FourthQuarterDividendMember
 | 
      
      
        | Class A and Class B common stock, dividend declared per share, paid | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
        
$ 0.0650us-gaap_CommonStockDividendsPerShareCashPaid / us-gaap_DividendsAxis = salm_FourthQuarterDividendMember
 | 
        
$ 0.0550us-gaap_CommonStockDividendsPerShareCashPaid / us-gaap_DividendsAxis = salm_FourthQuarterDividendMember
 | 
      
      
        | Class A and Class B common stock, dividend paid | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
         
 | 
        
$ 1,646us-gaap_PaymentsOfDividendsCommonStock / us-gaap_DividendsAxis = salm_FourthQuarterDividendMember
 | 
        
$ 1,376us-gaap_PaymentsOfDividendsCommonStock / us-gaap_DividendsAxis = salm_FourthQuarterDividendMember
 |