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Goodwill (Tables)
 3 Months Ended
Mar. 27, 2020
Goodwill Disclosure [Abstract]  
Schedule of Goodwill
A summary of changes in goodwill by reportable segment is as follows:
(Thousands)
 
Performance Alloys and Composites
 
Advanced Materials
 
Precision Coatings
 
Total
Balance at December 31, 2019
 
$
1,899

 
$
50,190

 
$
26,922

 
$
79,011

Impairment charge
 
—

 
—

 
(9,053
)
 
(9,053
)
Other
 
—

 
(126
)
 
—

 
(126
)
Balance at March 27, 2020
 
$
1,899

 
$
50,064

 
$
17,869

 
$
69,832