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Goodwill and Other Intangible Assets
9 Months Ended
Sep. 30, 2016
Goodwill and Other Intangible Assets [Abstract]  
Goodwill and Other Intangible Assets
Note 3.          Goodwill and Other Intangible Assets

The goodwill balance was $14.9 million as of September 30, 2016 and December 31, 2015. Goodwill is subject to annual impairment tests and if triggering events are present before the annual tests, we will assess impairment. As of September 30, 2016, no impairment charges were taken.

Other intangible assets consist primarily of customer relationship enhancements. Other intangible assets are amortized on a straight-line basis over their estimated useful lives of 5 years. The amortization is based on a forecast of approximately equal annual customer orders over the 5-year period. The other intangible assets were fully amortized as of June 30, 2016. Amortization expense was $1.1 million for the nine months ended September 30, 2016, and $0.6 million and $1.7 million for three and nine months ended September 30, 2015, respectively. Other intangible assets are subject to impairment review if there are events or changes in circumstances that indicate that the carrying amount is not recoverable. As of September 30, 2016, no impairment charges were taken.

Other intangible assets consist of the following (in thousands):

  
September 30, 2016
  
December 31, 2015
 
  
Cost
  
Accumulated
Amortization
  
Cost
  
Accumulated
Amortization
 
Other intangible assets
 
$
11,286
  
$
11,286
  
$
11,286
  
$
10,157
 
  
$
11,286
  
$
11,286
  
$
11,286
  
$
10,157