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Other Intangibles
12 Months Ended
Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Other Intangibles
(7)     Other Intangibles
Other intangibles are comprised of the following:

 
 
 
December 31,
 
 
December 31,
 
 
 
2017
 
 
2018
 
Advertiser relationships
 
$
1,355,879
 
 
$
2,819,879
 
Advertiser lists
 
 
16,251
 
 
 
16,251
 
Sports program rights
 
 
267,400
 
 
 
267,400
 
 
 
 
1,639,530
 
 
 
3,103,530
 
Less accumulated amortization
 
 
(1,115,113
)
 
 
(1,395,064
)
 
 
$
524,417
 
 
$
1,708,466
 
Brands
 
 
 
 
 
1,085,888
 
Other intangibles with indefinite lives
 
 
25,641
 
 
 
28,824
 
 
 
$
550,058
 
 
$
2,823,178
 
 
The Company recorded amortization expense of $0.3 million and $0.5 million for the years ended December 31, 2017 and 2018, respectively. Estimated future amortization expense related to intangible assets subject to amortization for the next five years and thereafter is as follows:

 
2019
 
$
295,864
 
2020
 
 
259,282
 
2021
 
 
144,051
 
2022
 
 
133,092
 
2023
 
 
133,092
 
Thereafter
 
 
743,085
 
Total
 
$
1,708,466