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Acquisitions and Dispositions (Details Textual) - USD ($)
Sep. 01, 2015
Dec. 31, 2016
Dec. 02, 2016
Nov. 14, 2016
Nov. 08, 2016
Oct. 11, 2016
Sep. 12, 2016
Aug. 11, 2016
Jun. 03, 2016
Apr. 11, 2016
Apr. 08, 2016
Mar. 25, 2016
Mar. 16, 2016
Dec. 31, 2015
Nov. 23, 2015
Nov. 12, 2015
Nov. 02, 2015
Oct. 23, 2015
Aug. 26, 2015
Aug. 01, 2015
Jul. 13, 2015
Business Acquisition [Line Items]                                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets, Total   $ 14,243,000                       $ 11,980,000              
Belmont Verstandig Inc [Member]                                          
Business Acquisition [Line Items]                                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles                                       $ 10,131,000  
Business Acquisition, Transaction Costs                                       $ 128,000  
Gamma Broadcasting, LLC [Member]                                          
Business Acquisition [Line Items]                                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles $ 1,558,000                                        
Business Acquisition, Transaction Costs 92,000                                        
FM Translator [Member] | Manchester, New Hampshire Market [Member]                                          
Business Acquisition [Line Items]                                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles                                         $ 45,000
FM Translator [Member] | Gamma Broadcasting, LLC [Member]                                          
Business Acquisition [Line Items]                                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles 50,000                                        
FM Translator [Member] | Portland, Maine market [Member]                                          
Business Acquisition [Line Items]                                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles                         $ 50,000                
FM Translator [Member] | Milwaukee, Wisconsin Market [Member]                                          
Business Acquisition [Line Items]                                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles                       $ 50,000                  
FM Station [Member] | Asheville, North Carolina Market [Member]                                          
Business Acquisition [Line Items]                                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles                                     $ 125,000    
FM Station [Member] | Gamma Broadcasting, LLC [Member]                                          
Business Acquisition [Line Items]                                          
Business Combination, Separately Recognized Transactions, Expenses and Losses Recognized $ 400,000                                        
FM Station [Member] | Wilks Broadcast - Columbus, LLC [Member]                                          
Business Acquisition [Line Items]                                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets, Total                                 $ 13,791,000        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables                                 734,000        
Business Acquisition, Transaction Costs                                 $ 57,000        
Illinois Radio Network [Member]                                          
Business Acquisition [Line Items]                                          
Impaired Assets to be Disposed of by Method Other than Sale, Carrying Value of Asset                           $ 7,000              
Tennessee Market [Member] | FM Translator Serving the Charlottesville [Member]                                          
Business Acquisition [Line Items]                                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles                   $ 30,000                      
Iowa Market [Member] | FM Translator Serving the Spencer [Member]                                          
Business Acquisition [Line Items]                                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles                 $ 35,000                        
Iowa Market [Member] | FM Translator Serving Des Moines [Member]                                          
Business Acquisition [Line Items]                                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles         $ 25,000                                
Virginia Market [Member] | FM Translator Serving the Charlottesville [Member]                                          
Business Acquisition [Line Items]                                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles                     $ 100,000       $ 150,000     $ 30,000      
Washington Market [Member] | FM Translator Serving the Bellingham [Member]                                          
Business Acquisition [Line Items]                                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles           $ 25,000   $ 50,000                          
Maine market [Member] | FM Translator Serving the Portland [Member]                                          
Business Acquisition [Line Items]                                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles             $ 45,000                            
Illinois Market [Member] | FM Translator Serving Springfield [Member]                                          
Business Acquisition [Line Items]                                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles       $ 23,000                                  
New York Market [Member] | FM Translator Serving Ithaca [Member]                                          
Business Acquisition [Line Items]                                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles     $ 35,000                                    
Ohio Market [Member] | FM Translator Serving the Bucyrus [Member]                                          
Business Acquisition [Line Items]                                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles                               $ 30,000