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Goodwill and Other Intangible Assets
9 Months Ended
Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Other Intangible Assets
Goodwill and Other Intangible Assets

The gross carrying amount and accumulated amortization of goodwill and other intangible assets as of September 30, 2016 and December 31, 2015 are as follows: 
 
 
September 30, 2016
 
December 31, 2015
Goodwill
 
$
4,150,339

 
$
4,150,339

Other intangible assets:
 
 

 
 

Gross carrying amount
 
$
3,702,691

 
$
3,609,524

Accumulated amortization
 
(3,474,808
)
 
(3,353,387
)
Net carrying amount
 
$
227,883

 
$
256,137



For the three months ended September 30, 2016 and 2015, amortization expense was $39,186 and $40,167, respectively. For the nine months ended September 30, 2016 and 2015, amortization expense was $121,421 and $113,859, respectively.