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Goodwill and Other Intangible Assets (Notes)
9 Months Ended
Sep. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Other Intangible Assets Goodwill and Other Intangible Assets
Goodwill
Changes in the carrying amount of goodwill for the nine months ended September 30, 2024 are summarized as follows (dollars in thousands):
PackagingAerospaceSpecialty ProductsTotal
Balance, December 31, 2023$287,350 $69,860 $6,560 $363,770 
Foreign currency translation and other1,480 (150)— 1,330 
Balance, September 30, 2024$288,830 $69,710 $6,560 $365,100 
Other Intangible Assets
The Company amortizes its other intangible assets over periods ranging from one to 30 years. The gross carrying amounts and accumulated amortization of the Company's other intangibles are summarized below (dollars in thousands):
As of September 30, 2024As of December 31, 2023
Intangible Category by Useful LifeGross Carrying AmountAccumulated AmortizationGross Carrying AmountAccumulated Amortization
Finite-lived intangible assets:
   Customer relationships, 5 – 12 years$141,540 $(94,670)$141,260 $(89,020)
   Customer relationships, 15 – 25 years129,670 (85,230)129,830 (80,600)
Total customer relationships271,210 (179,900)271,090 (169,620)
   Technology and other, 1 – 15 years57,010 (43,990)56,970 (41,850)
   Technology and other, 17 – 30 years43,300 (40,990)43,300 (40,730)
Total technology and other100,310 (84,980)100,270 (82,580)
Indefinite-lived intangible assets:
 Trademark/Trade names62,010 — 61,860 — 
Total other intangible assets$433,530 $(264,880)$433,220 $(252,200)
Amortization expense related to intangible assets as included in the accompanying consolidated statement of income is summarized as follows (dollars in thousands):
Three months ended September 30,Nine months ended September 30,
2024202320242023
Technology and other, included in cost of sales$810 $800 $2,470 $2,410 
Customer relationships, included in selling, general and administrative expenses3,400 3,810 10,170 11,400 
Total amortization expense$4,210 $4,610 $12,640 $13,810