Salem Media Group, Inc. Quarterly report pursuant to Section 13 or 15(d)

Summary of Changes in Present Value of Acquisition Related Contingent Earn-Out Consideration (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014
Business Acquisition, Contingent Consideration [Line Items]
Beginning Balance as of January 1, 2014	$ 3,155	$ 616
Acquisitions		2,047
Accretion of acquisition-related contingent consideration	32	155
Change in the estimated fair value of contingent earn-out consideration	545	914
Payments	(300)	(300)
Ending Balance as of September 30, 2014	3,432	3,432
Short Term Accrued Expenses
Business Acquisition, Contingent Consideration [Line Items]
Beginning Balance as of January 1, 2014	1,556	329
Acquisitions		692
Accretion of acquisition-related contingent consideration	15	64
Change in the estimated fair value of contingent earn-out consideration	382	692
Reclassification of payments due in next12 month to short-term		176
Payments	(300)	(300)
Ending Balance as of September 30, 2014	1,653	1,653
Long Term Other Liabilities
Business Acquisition, Contingent Consideration [Line Items]
Beginning Balance as of January 1, 2014	1,599	287
Acquisitions		1,355
Accretion of acquisition-related contingent consideration	17	91
Change in the estimated fair value of contingent earn-out consideration	163	222
Reclassification of payments due in next12 month to short-term		(176)
Ending Balance as of September 30, 2014	$ 1,779	$ 1,779