Annual report pursuant to Section 13 and 15(d)

INCOME TAXES (Schedule of Reconciliation of Statutory Federal Income Tax Rate to Provision for Income Tax) (Details)

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INCOME TAXES (Schedule of Reconciliation of Statutory Federal Income Tax Rate to Provision for Income Tax) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income Tax Expense Benefit Continuing Operations Income Tax Reconciliation [Abstract]      
Statutory federal income tax rate (at 35%) $ 3,584us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate $ (2,411)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate $ 1,637us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
Effect of state taxes, net of federal 542us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes (2,025)us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes (2,278)us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes
Permanent items 613salm_IncomeTaxReconciliationOtherPermanentItems 270salm_IncomeTaxReconciliationOtherPermanentItems 788salm_IncomeTaxReconciliationOtherPermanentItems
Other, net 26us-gaap_OtherTaxExpenseBenefit (26)us-gaap_OtherTaxExpenseBenefit 6us-gaap_OtherTaxExpenseBenefit
Provision for (benefit from) income taxes $ 4,765us-gaap_IncomeTaxExpenseBenefit $ (4,192)us-gaap_IncomeTaxExpenseBenefit $ 153us-gaap_IncomeTaxExpenseBenefit