Goodwill and Other Intangible Assets - Goodwill Rollforward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Roll Forward]
Balance, beginning	$ 339,810	$ 315,490
Goodwill, Acquired During Period	20,420	32,370
Foreign currency translation	3,540	(8,050)
Balance, ending	363,770	339,810
Packaging [Member]
Goodwill [Roll Forward]
Balance, beginning	263,550	238,740
Goodwill, Acquired During Period	20,420	32,370
Foreign currency translation	3,380	(7,560)
Balance, ending	287,350	263,550
Aerospace [Member]
Goodwill [Roll Forward]
Balance, beginning	69,700	70,190
Goodwill, Acquired During Period	0	0
Foreign currency translation	160	(490)
Balance, ending	69,860	69,700
Specialty Products [Member]
Goodwill [Roll Forward]
Balance, beginning	6,560	6,560
Goodwill, Acquired During Period	0	0
Foreign currency translation	0	0
Balance, ending	$ 6,560	$ 6,560