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Goodwill and Intangible Assets
12 Months Ended
Dec. 31, 2015
Goodwill and Intangible Assets [Abstract]  
Goodwill and Intangible Assets
Note 3. Goodwill and Other Intangible Assets

The goodwill balance was $14.9 million as of December 31, 2015 and 2014.  Goodwill is subject to annual impairment tests and if triggering events are present before the annual tests, we will assess impairment.  As of December 31, 2015, 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. Amortization expense for 2015, 2014 and 2013 was $2.3 million.  The remaining balance of $1.1 million will be fully amortized as of June 30, 2016. 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 December 31, 2015, no impairment charges were taken.

Other intangible assets consist of the following:
  
December 31, 2015
  
December 31, 2014
 
  
Cost
  
Accumulated Amortization
  
Cost
  
Accumulated Amortization
 
Other intangible assets
 
$
11,286
  
$
10,157
  
$
11,286
  
$
7,900
 
  
$
11,286
  
$
10,157
  
$
11,286
  
$
7,900