Segment Information Segment Information (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Net sales		$ 227,100	$ 215,460
Operating profit (loss)		12,440	9,990
Segment Reporting Information, Additional Information [Abstract]
Gain (Loss) on Disposition of Assets		60	10
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest		7,190	6,220
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating profit (loss)		26,850	25,570
Operating Segments [Member] | Packaging [Member]
Segment Reporting Information [Line Items]
Net sales		127,020	116,220
Operating profit (loss)		17,110	14,390
Operating Segments [Member] | Aerospace [Member]
Segment Reporting Information [Line Items]
Net sales		67,340	49,990
Operating profit (loss)		7,130	1,430
Operating Segments [Member] | Specialty Products [Member]
Segment Reporting Information [Line Items]
Net sales		32,740	49,250
Operating profit (loss)		2,610	9,750
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Operating profit (loss)	[1]	$ (14,410)	$ (15,580)

[1] Corporate consists of the corporate office and related corporate activities. Corporate expenses primarily include compensation, benefits, professional services, information technology and other administrative costs. Corporate expenses reconcile reportable segment information to the consolidated totals