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Acquired Intangible Assets
3 Months Ended
Mar. 31, 2024
Acquired Intangible Assets [Abstract]  
Acquired Intangible Assets
Note 7.   Acquired Intangible Assets

Acquired identifiable intangible assets consist of the following:

 
 
March 31,
2024
   
December 31,
2023
 
 
 
(In thousands)
 
Customer relationships
 
$
159,843
   
$
159,641
 
Patents, developed technology and intellectual property
   
14,123
     
14,123
 
Trademarks and trade names
   
8,880
     
8,880
 
Non-compete agreements
   
3,308
     
3,295
 
Supply agreements
   
800
     
800
 
Leaseholds
   
160
     
160
 
Total acquired intangible assets
   
187,114
     
186,899
 
Less: Accumulated amortization (a)
   
(98,163
)
   
(95,681
)
Net acquired intangible assets
 
$
88,951
   
$
91,218
 


(a)
Applies to all intangible assets, except for trademarks and trade names totaling $2.6 million, which has an indefinite useful life and, as such, is not being amortized.

Total amortization expense for acquired intangible assets was $2.1 million and $2.2 million for the three months ended March 31, 2024 and 2023, respectively. Based on the current estimated useful lives assigned to our intangible assets, amortization expense is estimated to be $6.4 million for the remainder of 2024, $8.5 million in 2025, $8.5 million in 2026, $8.5 million in 2027 and $54.5 million in the aggregate for the years 2028 through 2041.