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Other Intangibles
12 Months Ended
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Other Intangibles
(7) Other Intangibles

Other intangibles are comprised of the following:

 

     December 31,
2016
     December 31,
2017
 

Advertiser relationships

   $ 1,355,879      $ 1,355,879  

Advertiser lists

     16,251        16,251  

Sports program rights

     —          267,400  

Other intangibles

     25,641        25,641  
  

 

 

    

 

 

 
     1,397,771        1,665,171  

Less accumulated amortization

     (862,189      (1,115,113
  

 

 

    

 

 

 
   $ 535,582      $ 550,058  
  

 

 

    

 

 

 

The Company recorded amortization expense of $2.7 million and $0.3 million for the years ended December 31, 2016 and 2017, respectively. Estimated future amortization expense related to intangible assets subject to amortization for the next four years is as follows:

 

2018

   $ 224,493  

2019

     162,768  

2020

     126,195  

2021

     10,961  
  

 

 

 

Total

   $ 524,417