Segment Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023		Dec. 31, 2022		Dec. 31, 2021
Segment Reporting Information [Line Items]
Net sales	$ 893,550		$ 883,830		$ 857,110
Operating Profit (loss)	65,440		99,060		95,090
Capital Expenditures	54,190		45,960		45,060
Depreciation and Amortization	57,590		53,220		53,450
Assets	1,341,660		1,305,000		1,303,640
Net gain (loss) on dispositions of assets	(180)		21,950		(130)
Proceeds from Sale of Property, Plant, and Equipment			23,300
Packaging [Member]
Segment Reporting Information [Line Items]
Net sales	463,600		522,180		533,260
Operating Profit (loss)	60,140		81,000		96,490
Capital Expenditures	29,060		33,170		34,080
Depreciation and Amortization	34,170		29,340		30,500
Assets	830,620		776,550		739,920
Aerospace [Member]
Segment Reporting Information [Line Items]
Net sales	241,400		188,090		183,340
Operating Profit (loss)	15,520		8,060	[1]	13,270
Capital Expenditures	14,620		6,900		5,390
Depreciation and Amortization	19,160		19,620		18,700
Assets	390,910		347,720		353,800
Proceeds from Sale of Property, Plant, and Equipment			5,000
Aerospace [Member] | Land and Land Improvements [Member]
Segment Reporting Information [Line Items]
Net gain (loss) on dispositions of assets			4,800
Specialty Products [Member]
Segment Reporting Information [Line Items]
Net sales	188,550		173,560		140,510
Operating Profit (loss)	36,400		30,250		22,550
Capital Expenditures	10,410		5,860		5,500
Depreciation and Amortization	4,130		4,130		4,120
Assets	92,770		86,290		73,260
Corporate [Member]
Segment Reporting Information [Line Items]
Operating Profit (loss)	(46,620)	[2]	(20,250)	[3]	(37,220)
Capital Expenditures	100	[2]	30		90
Depreciation and Amortization	130	[2]	130		130
Assets	$ 27,360	[2]	94,440		$ 136,660
Net gain (loss) on dispositions of assets			$ 17,600

[1] In 2022, the Company completed the sale of vacant land adjacent to the Company's Tolleson, Arizona, manufacturing facility for net proceeds of $5.0 million, and recognized a $4.8 million gain on the sale, which is included within the Aerospace segment.

[2] Corporate consists of our corporate office and related corporate activities. Corporate expenses primarily include compensation, benefits, professional services, information technology and other administrative costs. Corporate assets consist primarily of cash and cash equivalents, unallocated deferred tax assets and prepaid assets. Corporate expenses and assets reconcile reportable segment information to the consolidated totals.

[3] In 2022, the Company sold a non-core facility in City of Industry, California, for net proceeds of $23.3 million, and recognized a $17.6 million gain on the sale, which is included in Corporate operating loss for 2022 and included within net gain (loss) on disposition of assets in the accompanying consolidated statement of income.