Segment Information Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022		Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Net sales	$ 235,340	$ 218,530		$ 683,990	$ 680,520
Operating profit (loss)	23,760	20,980		53,810	72,780
Segment Reporting Information, Additional Information [Abstract]
Gain (Loss) on Disposition of Assets				70	4,540
Aerospace [Member] | Land and Land Improvements [Member]
Segment Reporting Information, Additional Information [Abstract]
Gain (Loss) on Disposition of Assets		4,800			4,800
Operating Segments [Member] | Packaging [Member]
Segment Reporting Information [Line Items]
Net sales	116,500	129,700		350,040	416,540
Operating profit (loss)	16,470	17,590		48,140	66,720
Operating Segments [Member] | Aerospace [Member]
Segment Reporting Information [Line Items]
Net sales	67,580	45,420		177,370	137,330
Operating profit (loss)	7,130	4,710	[1]	11,190	9,300	[1]
Operating Segments [Member] | Specialty Products [Member]
Segment Reporting Information [Line Items]
Net sales	51,260	43,410		156,580	126,650
Operating profit (loss)	10,510	6,760		32,360	20,770
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Operating profit (loss)	$ (10,350)	$ (8,080)		$ (37,880)	$ (24,010)

[1] In the three and nine months ended September 30, 2022, the Company recognized a $4.8 million pre-tax gain on the sale of vacant land adjacent to the Company's Tolleson, Arizona, manufacturing facility within the Aerospace segment.