BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Details Textual) $ in Millions	Jun. 30, 2018 USD ($)
Schedule Of Significant Accounting Policies [Line Items]
Prepaid commission expense	$ 0.7

Amount of consideration paid in advance forcommission expense.

No definition available.

Name:	salm_PrepaidCommissionExpense
Namespace Prefix:	salm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant