Segment Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net sales	$ 857,110	$ 769,970	$ 723,530
Operating Profit (loss)	95,090	(88,290)	91,220
Capital Expenditures	45,060	40,480	29,670
Depreciation and Amortization	53,450	49,770	43,500
Assets	1,303,640	1,193,880	1,192,700
Packaging [Member]
Segment Reporting Information [Line Items]
Net sales	533,260	488,340	392,340
Operating Profit (loss)	96,490	93,990	80,770
Capital Expenditures	34,080	30,730	16,400
Depreciation and Amortization	30,500	27,600	24,650
Assets	739,920	721,440	546,950
Aerospace [Member]
Segment Reporting Information [Line Items]
Net sales	183,340	167,740	194,110
Operating Profit (loss)	13,270	(133,440)	28,950
Capital Expenditures	5,390	5,770	8,110
Depreciation and Amortization	18,700	18,130	15,090
Assets	353,800	348,190	393,260
Specialty Products [Member]
Segment Reporting Information [Line Items]
Net sales	140,510	113,890	137,080
Operating Profit (loss)	22,550	4,350	16,000
Capital Expenditures	5,500	3,890	5,090
Depreciation and Amortization	4,120	3,910	3,480
Assets	73,260	65,520	77,250
Corporate [Member]
Segment Reporting Information [Line Items]
Operating Profit (loss)	(37,220)	(53,190)	(34,500)
Capital Expenditures	90	90	70
Depreciation and Amortization	130	130	280
Assets	$ 136,660	$ 58,730	$ 175,240