Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

Changes in the carrying amount of goodwill for the years ended December 31, 2022 and 2021 are as follows (dollars in thousands):

					Specialty
	Packaging		Aerospace		Products		Total
Balance, December 31, 2020	$	234,560	$	62,850	$	6,560	$	303,970
Goodwill from acquisitions	10,550		7,220		—		17,770
Foreign currency translation and other	(6,370)		120		—		(6,250)
Balance, December 31, 2021	$	238,740	$	70,190	$	6,560	$	315,490
Goodwill from acquisitions	32,370		—		—		32,370
Foreign currency translation and other	(7,560)		(490)		—		(8,050)
Balance, December 31, 2022	$	263,550	$	69,700	$	6,560	$	339,810

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, 2022 and 2021 are summarized below (dollars in thousands):

	As of December 31, 2022				As of December 31, 2021
Intangible Category by Useful Life	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Finite-lived intangible assets:
Customer relationships, 5 - 12 years	$	131,660	$	(80,000)	$	124,310	$	(71,150)
Customer relationships, 15 - 25 years	129,650		(74,380)		130,190		(68,190)
Total customer relationships	261,310		(154,380)		254,500		(139,340)
Technology and other, 1 - 15 years	56,860		(38,990)		57,060		(36,140)
Technology and other, 17 - 30 years	43,300		(40,330)		43,300		(39,920)
Total technology and other	100,160		(79,320)		100,360		(76,060)
Indefinite-lived intangible assets:
Trademark/Trade names	60,340		—		57,270		—
Total other intangible assets	$	421,810	$	(233,700)	$	412,130	$	(215,400)

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,
	2022		2021		2020
Technology and other, included in cost of sales	$	3,300	$	3,820	$	4,930
Customer relationships, included in selling, general and administrative expenses	15,800		17,740		15,820
Total amortization expense	$	19,100	$	21,560	$	20,750

Schedule of Expected Amortization Expense [Table Text Block]

Estimated amortization expense for the next five fiscal years beginning after December 31, 2022 is as follows (dollars in thousands):

Year ended December 31,	Estimated Amortization Expense
2023		$	17,990
2024		$	16,490
2025		$	16,140
2026		$	14,420
2027		$	14,360