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Acquired Intangible Assets (Tables)
9 Months Ended
Sep. 30, 2018
Acquired Intangible Assets [Abstract]  
Acquired Identifiable Intangible Assets
Acquired identifiable intangible assets consist of the following:

  
September 30,
2018
  
December 31,
2017
 
  
(In thousands)
 
       
Customer relationships
 
$
87,290
  
$
87,290
 
Trademarks and trade names
  
6,800
   
6,800
 
Non-compete agreements
  
3,197
   
3,193
 
Patents
  
723
   
723
 
Supply agreements
  
800
   
800
 
Leaseholds
  
160
   
160
 
Total acquired intangible assets
  
98,970
   
98,966
 
Less accumulated amortization (1)
  
(49,587
)
  
(43,853
)
Net acquired intangible assets
 
$
49,383
  
$
55,113
 


(1)
Applies to all intangible assets, except for trademarks and trade names totaling $5.2 million, which have indefinite useful lives and, as such, are not being amortized.