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Intangible Assets and Goodwill Goodwill by Segment (Details) (USD $)
In Thousands, unless otherwise specified
Nov. 30, 2014
Feb. 28, 2014
Goodwill $ 74,337us-gaap_Goodwill $ 12,639us-gaap_Goodwill
Radio    
Goodwill 63,549us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= emms_RadioMember		 4,603us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= emms_RadioMember
Publishing    
Goodwill 8,036us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= emms_PublishingMember		 8,036us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= emms_PublishingMember
Corporate and Emerging Technologies [Member]    
Goodwill $ 2,752us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= emms_CorporateandEmergingTechnologiesMember		 $ 0us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= emms_CorporateandEmergingTechnologiesMember