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Intangible Assets
 12 Months Ended
Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets Intangible Assets
The following table summarizes our goodwill by segment as of December 31, 2022 and 2021: 
(in thousands)20222021
Manufacturing$18,270 $18,270 
Plastics19,302 19,302 
Total Goodwill$37,572 $37,572 
Our annual goodwill impairment testing, performed in the fourth quarters of 2022 and 2021, indicated no impairment existed as of the test date.
The following table summarizes the components of our intangible assets at December 31, 2022 and 2021:
(in thousands)Gross
Amount		Accumulated
Amortization		Net Carrying
Amount
December 31, 2022
Customer Relationships$22,491 $14,568 $7,923 
Other26 6 20 
Total22,517 14,574 7,943 
December 31, 2021
Customer Relationships22,491 13,469 9,022 
Other26 4 22 
Total$22,517 $13,473 $9,044 
Amortization expense for these intangible assets for each of the years ended December 31, 2022, 2021 and 2020 totaled $1.1 million.
Annual amortization expense for these intangible assets for the next five years is: 
(in thousands)20232024202520262027
Amortization Expense$1,100 $1,100 $1,100 $1,092 $1,090