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Other Significant Transactions - Additional Information (Details)
$ in Millions
12 Months Ended
Aug. 09, 2013
USD ($)
wireless_device
Feb. 29, 2016
USD ($)
Feb. 28, 2015
USD ($)
Feb. 28, 2014
USD ($)
Long-term Purchase Commitment [Line Items]        
Call option, maximum ownership interest allowed to be exercised by radio operator 30.00%      
NextRadio        
Long-term Purchase Commitment [Line Items]        
Period of agreement 3 years      
Agreement amount $ 15.0      
Variable interest entity, consolidated, carrying amount of assets     $ 1.3  
Variable interest entity, liabilities     1.3  
NextRadio | Minimum        
Long-term Purchase Commitment [Line Items]        
Minimum number of devices with pre-loaded smartphone application | wireless_device 30,000,000      
Emmis        
Long-term Purchase Commitment [Line Items]        
Expense recognized in period   $ 0.4 $ 0.5 $ 1.1