Annual report pursuant to Section 13 and 15(d)

IMPAIRMENT OF GOODWILL AND OTHER INDEFINITE-LIVED INTANGIBLE ASSETS (Schedule of Key Estimates and Assumptions Used in Start-up Income Valuation of Broadcast Market Clusters for Each Testing Period (Detail)

v2.4.1.9
IMPAIRMENT OF GOODWILL AND OTHER INDEFINITE-LIVED INTANGIBLE ASSETS (Schedule of Key Estimates and Assumptions Used in Start-up Income Valuation of Broadcast Market Clusters for Each Testing Period (Detail)
6 Months Ended 12 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Digital Media [Member] | Enterprise Valuation [Member]          
Fair Value Inputs, Assets, Quantitative Information [Line Items]          
Risk adjusted discount rate     8.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_StatementBusinessSegmentsAxis
= salm_InternetMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
13.50%us-gaap_FairValueInputsDiscountRate
/ us-gaap_StatementBusinessSegmentsAxis
= salm_InternetMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
13.50%us-gaap_FairValueInputsDiscountRate
/ us-gaap_StatementBusinessSegmentsAxis
= salm_InternetMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
Long-term revenue market growth rate ranges     2.50%us-gaap_FairValueInputsLongTermRevenueGrowthRate
/ us-gaap_StatementBusinessSegmentsAxis
= salm_InternetMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
3.00%us-gaap_FairValueInputsLongTermRevenueGrowthRate
/ us-gaap_StatementBusinessSegmentsAxis
= salm_InternetMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
3.00%us-gaap_FairValueInputsLongTermRevenueGrowthRate
/ us-gaap_StatementBusinessSegmentsAxis
= salm_InternetMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
Digital Media [Member] | Enterprise Valuation [Member] | Minimum [Member]          
Fair Value Inputs, Assets, Quantitative Information [Line Items]          
Operating profit margin ranges     (7.40%)us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_StatementBusinessSegmentsAxis
= salm_InternetMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
21.20%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_StatementBusinessSegmentsAxis
= salm_InternetMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
21.20%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_StatementBusinessSegmentsAxis
= salm_InternetMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
Digital Media [Member] | Enterprise Valuation [Member] | Maximum [Member]          
Fair Value Inputs, Assets, Quantitative Information [Line Items]          
Operating profit margin ranges     34.90%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_StatementBusinessSegmentsAxis
= salm_InternetMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
22.00%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_StatementBusinessSegmentsAxis
= salm_InternetMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
22.00%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_StatementBusinessSegmentsAxis
= salm_InternetMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
Publishing [Member]          
Fair Value Inputs, Assets, Quantitative Information [Line Items]          
Risk adjusted discount rate 9.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_StatementBusinessSegmentsAxis
= salm_PublishingMember
    9.50%us-gaap_FairValueInputsDiscountRate
/ us-gaap_StatementBusinessSegmentsAxis
= salm_PublishingMember
 
Publishing [Member] | Enterprise Valuation [Member]          
Fair Value Inputs, Assets, Quantitative Information [Line Items]          
Risk adjusted discount rate 9.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_StatementBusinessSegmentsAxis
= salm_PublishingMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
8.50%us-gaap_FairValueInputsDiscountRate
/ us-gaap_StatementBusinessSegmentsAxis
= salm_PublishingMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
8.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_StatementBusinessSegmentsAxis
= salm_PublishingMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
9.50%us-gaap_FairValueInputsDiscountRate
/ us-gaap_StatementBusinessSegmentsAxis
= salm_PublishingMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
8.50%us-gaap_FairValueInputsDiscountRate
/ us-gaap_StatementBusinessSegmentsAxis
= salm_PublishingMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
Long-term revenue market growth rate ranges 1.00%us-gaap_FairValueInputsLongTermRevenueGrowthRate
/ us-gaap_StatementBusinessSegmentsAxis
= salm_PublishingMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
1.50%us-gaap_FairValueInputsLongTermRevenueGrowthRate
/ us-gaap_StatementBusinessSegmentsAxis
= salm_PublishingMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
1.50%us-gaap_FairValueInputsLongTermRevenueGrowthRate
/ us-gaap_StatementBusinessSegmentsAxis
= salm_PublishingMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
0.50%us-gaap_FairValueInputsLongTermRevenueGrowthRate
/ us-gaap_StatementBusinessSegmentsAxis
= salm_PublishingMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
1.50%us-gaap_FairValueInputsLongTermRevenueGrowthRate
/ us-gaap_StatementBusinessSegmentsAxis
= salm_PublishingMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
Publishing [Member] | Enterprise Valuation [Member] | Minimum [Member]          
Fair Value Inputs, Assets, Quantitative Information [Line Items]          
Operating profit margin ranges 0.90%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_StatementBusinessSegmentsAxis
= salm_PublishingMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
1.40%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_StatementBusinessSegmentsAxis
= salm_PublishingMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
2.40%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_StatementBusinessSegmentsAxis
= salm_PublishingMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
(0.50%)us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_StatementBusinessSegmentsAxis
= salm_PublishingMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
0.50%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_StatementBusinessSegmentsAxis
= salm_PublishingMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
Publishing [Member] | Enterprise Valuation [Member] | Maximum [Member]          
Fair Value Inputs, Assets, Quantitative Information [Line Items]          
Operating profit margin ranges 6.00%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_StatementBusinessSegmentsAxis
= salm_PublishingMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
7.50%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_StatementBusinessSegmentsAxis
= salm_PublishingMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
5.90%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_StatementBusinessSegmentsAxis
= salm_PublishingMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
6.00%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_StatementBusinessSegmentsAxis
= salm_PublishingMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
7.00%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_StatementBusinessSegmentsAxis
= salm_PublishingMember
/ salm_ValueOfAssetAxis
= salm_IncomeApproachValuationMember
Radio Clusters [Member] | Goodwill-Broadcast [Member]          
Fair Value Inputs, Assets, Quantitative Information [Line Items]          
Risk adjusted discount rate     8.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_GoodwillMember
/ us-gaap_ProductOrServiceAxis
= salm_RadioClustersMember
9.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_GoodwillMember
/ us-gaap_ProductOrServiceAxis
= salm_RadioClustersMember
9.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_GoodwillMember
/ us-gaap_ProductOrServiceAxis
= salm_RadioClustersMember
Radio Clusters [Member] | Goodwill-Broadcast [Member] | Minimum [Member]          
Fair Value Inputs, Assets, Quantitative Information [Line Items]          
Operating profit margin ranges     8.40%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_GoodwillMember
/ us-gaap_ProductOrServiceAxis
= salm_RadioClustersMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
11.90%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_GoodwillMember
/ us-gaap_ProductOrServiceAxis
= salm_RadioClustersMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
16.90%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_GoodwillMember
/ us-gaap_ProductOrServiceAxis
= salm_RadioClustersMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Long-term revenue market growth rate ranges     1.00%us-gaap_FairValueInputsLongTermRevenueGrowthRate
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_GoodwillMember
/ us-gaap_ProductOrServiceAxis
= salm_RadioClustersMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
1.00%us-gaap_FairValueInputsLongTermRevenueGrowthRate
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_GoodwillMember
/ us-gaap_ProductOrServiceAxis
= salm_RadioClustersMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
1.00%us-gaap_FairValueInputsLongTermRevenueGrowthRate
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_GoodwillMember
/ us-gaap_ProductOrServiceAxis
= salm_RadioClustersMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Radio Clusters [Member] | Goodwill-Broadcast [Member] | Maximum [Member]          
Fair Value Inputs, Assets, Quantitative Information [Line Items]          
Operating profit margin ranges     46.10%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_GoodwillMember
/ us-gaap_ProductOrServiceAxis
= salm_RadioClustersMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
44.70%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_GoodwillMember
/ us-gaap_ProductOrServiceAxis
= salm_RadioClustersMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
49.20%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_GoodwillMember
/ us-gaap_ProductOrServiceAxis
= salm_RadioClustersMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Long-term revenue market growth rate ranges     5.00%us-gaap_FairValueInputsLongTermRevenueGrowthRate
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_GoodwillMember
/ us-gaap_ProductOrServiceAxis
= salm_RadioClustersMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
2.50%us-gaap_FairValueInputsLongTermRevenueGrowthRate
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_GoodwillMember
/ us-gaap_ProductOrServiceAxis
= salm_RadioClustersMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
3.50%us-gaap_FairValueInputsLongTermRevenueGrowthRate
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_GoodwillMember
/ us-gaap_ProductOrServiceAxis
= salm_RadioClustersMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember