Segment Information Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Net sales	$ 233,190	$ 237,680	$ 448,650	$ 461,990
Operating profit (loss)	20,060	29,870	30,050	51,800
Segment Reporting Information, Additional Information [Abstract]
Gain (Loss) on Disposition of Assets			(50)	(210)
Operating Segments [Member] | Packaging [Member]
Segment Reporting Information [Line Items]
Net sales	117,320	148,350	233,540	286,840
Operating profit (loss)	17,280	27,800	31,670	49,130
Operating Segments [Member] | Aerospace [Member]
Segment Reporting Information [Line Items]
Net sales	59,800	47,390	109,790	91,910
Operating profit (loss)	2,630	2,750	4,060	4,590
Operating Segments [Member] | Specialty Products [Member]
Segment Reporting Information [Line Items]
Net sales	56,070	41,940	105,320	83,240
Operating profit (loss)	12,100	6,770	21,850	14,010
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Operating profit (loss)	$ (11,950)	$ (7,450)	$ (27,530)	$ (15,930)