Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the carrying amount of goodwill for the years ended December 31, 2020 and 2019 are as follows (dollars in thousands):


					Specialty
	Packaging		Aerospace		Products		Total
Balance, December 31, 2018	$	163,660	$	146,430	$	6,560	$	316,650
Goodwill from acquisitions	18,400		—		—		18,400

Goodwill reassigned in segment realignment	—		(12,740)		12,740		—
Foreign currency translation and other	(410)		—		—		(410)
Balance, December 31, 2019	$	181,650	$	133,690	$	19,300	$	334,640
Goodwill from acquisitions	49,130		43,260		—		92,390
Impairment charge	—		(126,840)		—		(126,840)
Goodwill reassigned in segment realignment	—		12,740		(12,740)		—
Foreign currency translation and other	3,780		—		—		3,780
Balance, December 31, 2020	$	234,560	$	62,850	$	6,560	$	303,970

Schedule of Intangible Assets (excluding Goodwill) by Major Class

The gross carrying amounts and accumulated amortization of the Company's other intangibles as of December 31, 2020 and 2019 are summarized below (dollars in thousands):


	As of December 31, 2020				As of December 31, 2019
Intangible Category by Useful Life	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Finite-lived intangible assets:
Customer relationships, 5 - 12 years	$	122,970	$	(59,470)	$	73,860	$	(49,910)
Customer relationships, 15 - 25 years	122,280		(62,450)		122,280		(56,010)
Total customer relationships	245,250		(121,920)		196,140		(105,920)
Technology and other, 1 - 15 years	57,180		(32,800)		52,430		(29,790)
Technology and other, 17 - 30 years	43,300		(39,450)		43,300		(37,620)
Total technology and other	100,480		(72,250)		95,730		(67,410)
Indefinite-lived intangible assets:
Trademark/Trade names	54,640		—		42,850		—
Total other intangible assets	$	400,370	$	(194,170)	$	334,720	$	(173,330)

Schedule of Finite-Lived Intangible Assets, Amortization Expense

Amortization expense related to intangible assets as included in the accompanying consolidated statement of operations is summarized as follows (dollars in thousands):


	Year ended December 31,
	2020		2019		2018
Technology and other, included in cost of sales	$	4,930	$	4,780	$	4,890
Customer relationships, included in selling, general and administrative expenses	15,820		13,850		13,370
Total amortization expense	$	20,750	$	18,630	$	18,260

Schedule of Expected Amortization Expense [Table Text Block]

Estimated amortization expense for the next five fiscal years beginning after December 31, 2020 is as follows (dollars in thousands):


Year ended December 31,	Estimated Amortization Expense
2021		$	21,790
2022		$	18,230
2023		$	16,330
2024		$	14,830
2025		$	14,480