Segment Information Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Net sales	$ 224,310	$ 206,730
Operating profit (loss)	21,930	21,110
Operating Segments [Member] | Packaging [Member]
Segment Reporting Information [Line Items]
Net sales	138,490	132,090
Operating profit (loss)	21,330	21,300
Operating Segments [Member] | Aerospace [Member]
Segment Reporting Information [Line Items]
Net sales	44,520	44,610
Operating profit (loss)	1,840	4,500
Operating Segments [Member] | Specialty Products [Member]
Segment Reporting Information [Line Items]
Net sales	41,300	30,030
Operating profit (loss)	7,240	4,520
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Operating profit (loss)	$ (8,480)	$ (9,210)