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Goodwill and Other Intangible Assets
9 Months Ended
Sep. 30, 2015
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, 2015 and December 31, 2014 are as follows: 
 
 
September 30, 2015
 
December 31, 2014
Goodwill
 
$
4,150,339

 
$
4,150,339

Other intangible assets:
 
 

 
 

Gross carrying amount
 
$
3,572,850

 
$
3,395,024

Accumulated amortization
 
(3,312,846
)
 
(3,198,987
)
Net carrying amount
 
$
260,004

 
$
196,037



For the three months ended September 30, 2015 and 2014, amortization expense was $40,167 and $29,897, respectively. For the nine months ended September 30, 2015 and 2014, amortization expense was $113,859 and $90,713, respectively.