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Acquired Intangible Assets (Tables)
9 Months Ended
Sep. 30, 2019
Acquired Intangible Assets [Abstract]  
Acquired Identifiable Intangible Assets Acquired identifiable intangible assets consist of the following:

 
 
September 30,
2019
   
December 31,
2018
 
 
 
(In thousands)
 
Customer relationships
 
$
111,521
   
$
87,195
 
Trademarks and trade names
   
6,980
     
6,800
 
Non-compete agreements
   
3,273
     
3,193
 
Patents
   
723
     
723
 
Supply agreements
   
800
     
800
 
Leaseholds
   
160
     
160
 
Total acquired intangible assets
   
123,457
     
98,871
 
Less accumulated amortization (1)
   
(57,329
)
   
(51,391
)
Net acquired intangible assets
 
$
66,128
   
$
47,480
 

(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.