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Goodwill
 12 Months Ended
Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill
Goodwill

The Company evaluates goodwill for impairment at least annually during the fourth quarter. The annual tests during the fourth quarters of 2016, 2015 and 2014 resulted in no impairment. Each of the Company's two reportable segments, EP and AMS, have goodwill. The EP segment recorded $2.7 million in accumulated impairment losses in 2010. There are no accumulated impairment losses in the AMS segment as of December 31, 2016.

The changes in the carrying amount of goodwill for each reportable segment were as follows ($ in millions):
 
Engineered Papers
 
Advanced Materials & Structures
 
Total
Goodwill as of December 31, 2014
$
5.3

 
$
120.8

 
$
126.1

Goodwill acquired during the year
—

 
109.5

 
109.5

Foreign currency translation adjustments
(0.5
)
 
(1.8
)
 
(2.3
)
Goodwill as of December 31, 2015
4.8

 
228.5

 
233.3

Goodwill adjusted during the year
—

 
(0.2
)
 
(0.2
)
Foreign currency translation adjustments
(0.1
)
 
(3.5
)
 
(3.6
)
Goodwill as of December 31, 2016
$
4.7

 
$
224.8

 
$
229.5