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Intangible Assets and Goodwill - Additional Information (Detail) (USD $)
12 Months Ended
Feb. 28, 2015
Feb. 28, 2014
Feb. 28, 2013
Intangible Assets And Goodwill [Line Items]      
Amortization of Intangible Assets $ 900,000us-gaap_AmortizationOfIntangibleAssets    
Indefinite lived intangibles 210,057,000us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill 150,558,000us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill 150,522,000us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
FCC license term 8 years    
Goodwill impairment testing, period of average income used in test 2 years    
Impairment losses on intangible assets 67,915,000us-gaap_GoodwillAndIntangibleAssetImpairment 0us-gaap_GoodwillAndIntangibleAssetImpairment 11,419,000us-gaap_GoodwillAndIntangibleAssetImpairment
Goodwill written off   58,395,000us-gaap_GoodwillImpairmentLoss 400,000us-gaap_GoodwillImpairmentLoss
Amortization expense, next twelve months 1,514,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths    
Amortization expense, year two 1,514,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo    
Amortization expense, year three 1,255,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree    
Amortization expense, year four 1,076,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour    
Amortization expense, year five 1,076,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive    
Goodwill 15,392,000us-gaap_Goodwill 12,639,000us-gaap_Goodwill  
Maximum      
Intangible Assets And Goodwill [Line Items]      
Amortization of Intangible Assets   100,000us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
100,000us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Goodwill      
Intangible Assets And Goodwill [Line Items]      
Impairment losses on intangible assets 58,400,000us-gaap_GoodwillAndIntangibleAssetImpairment
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_GoodwillMember
   
Radio      
Intangible Assets And Goodwill [Line Items]      
Impairment losses on intangible assets 67,915,000us-gaap_GoodwillAndIntangibleAssetImpairment
/ us-gaap_StatementBusinessSegmentsAxis
= emms_RadioMember
  10,971,000us-gaap_GoodwillAndIntangibleAssetImpairment
/ us-gaap_StatementBusinessSegmentsAxis
= emms_RadioMember
Radio | Minimum      
Intangible Assets And Goodwill [Line Items]      
Goodwill impairment testing, market multiple used in test calculation 7.5emms_GoodwillImpairmentMarketMultipleUsedinTestCalculation
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_StatementBusinessSegmentsAxis
= emms_RadioMember
   
Radio | Maximum      
Intangible Assets And Goodwill [Line Items]      
Goodwill impairment testing, market multiple used in test calculation 8.5emms_GoodwillImpairmentMarketMultipleUsedinTestCalculation
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_StatementBusinessSegmentsAxis
= emms_RadioMember
   
Publishing      
Intangible Assets And Goodwill [Line Items]      
Goodwill impairment testing, market multiple used in test calculation 6.0emms_GoodwillImpairmentMarketMultipleUsedinTestCalculation
/ us-gaap_StatementBusinessSegmentsAxis
= emms_PublishingMember
   
Impairment losses on intangible assets     $ 448,000us-gaap_GoodwillAndIntangibleAssetImpairment
/ us-gaap_StatementBusinessSegmentsAxis
= emms_PublishingMember