Segment Information (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Segment Reporting Information [Line Items]
Operating Profit (Loss)	$ 127,870	$ 131,320	$ 109,340
Capital Expenditures	46,120	32,620	21,900
Continuing Operations [Member]
Segment Reporting Information [Line Items]
Net Sales	1,272,910	1,083,960	902,460
Operating Profit (Loss)	127,870	131,320	109,340
Capital Expenditures	46,120	28,380	20,350
Depreciation and Amortization	44,870	38,290	35,690
Packaging [Member] | Continuing Operations [Member]
Segment Reporting Information [Line Items]
Net Sales	275,160	185,240	171,170
Operating Profit (Loss)	57,550	48,060	48,710
Capital Expenditures	15,470	5,420	5,200
Depreciation and Amortization	17,970	13,200	12,640
Energy [Member] | Continuing Operations [Member]
Segment Reporting Information [Line Items]
Net Sales	190,210	166,780	129,100
Operating Profit (Loss)	17,810	19,740	14,700
Capital Expenditures	5,210	3,710	3,660
Depreciation and Amortization	3,600	2,790	1,960
Aerospace & Defense [Member] | Continuing Operations [Member]
Segment Reporting Information [Line Items]
Net Sales	78,580	78,590	73,930
Operating Profit (Loss)	20,820	18,640	18,090
Capital Expenditures	3,210	2,410	1,850
Depreciation and Amortization	2,660	2,580	2,330
Engineered Components [Member] | Continuing Operations [Member]
Segment Reporting Information [Line Items]
Net Sales	200,000	175,350	113,000
Operating Profit (Loss)	27,990	27,620	12,660
Capital Expenditures	4,090	5,490	2,780
Depreciation and Amortization	3,860	3,540	2,710
Cequent Asia Pacific [Member] | Continuing Operations [Member]
Segment Reporting Information [Line Items]
Net Sales	128,560	94,290	75,990
Operating Profit (Loss)	12,300	13,900	12,050
Capital Expenditures	8,290	8,780	3,530
Depreciation and Amortization	3,840	3,860	2,820
Cequent Americas [Member] | Continuing Operations [Member]
Segment Reporting Information [Line Items]
Net Sales	400,400	383,710	339,270
Operating Profit (Loss)	27,420	32,730	27,840
Capital Expenditures	9,670	2,400	3,100
Depreciation and Amortization	12,780	12,170	13,110
Corporate [Member] | Continuing Operations [Member]
Segment Reporting Information [Line Items]
Operating Profit (Loss)	(36,020)	(29,370)	(24,710)
Capital Expenditures	180	170	230
Depreciation and Amortization	$ 160	$ 150	$ 120