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Summary of Significant Accounting Policies Local Programming and Marketing Agreement Fees (Parenthetical) (Details) (USD $)
 0 Months Ended 3 Months Ended 9 Months Ended
Feb. 11, 2014
Station
Nov. 30, 2014
Nov. 30, 2013
Nov. 30, 2014
Nov. 30, 2013
Principal Transaction Revenue [Line Items]          
Number Of Stations To Be Purchased 2emms_NumberOfStationsToBePurchased        
LMA fee expense   $ 0emms_LMAFeeExpense $ 0emms_LMAFeeExpense $ 4,208,000emms_LMAFeeExpense $ 0emms_LMAFeeExpense
YMF          
Principal Transaction Revenue [Line Items]          
LMA monthly expense 1,275,000emms_LicensingAgreementMonthlyExpenseReimbursementAmount
/ us-gaap_ProductOrServiceAxis
= emms_YMFMember		        
LMA monthly expense future reduction 740,000emms_LicensingAgreementFutureReducedMonthlyExpenseReimbursementAmount
/ us-gaap_ProductOrServiceAxis
= emms_YMFMember