Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Segment Reporting Information [Line Items]
Net Sales	$ 335,870	$ 277,660	$ 971,870	$ 824,310
Operating profit (loss)	36,600	35,790	108,540	104,920
Packaging [Member]
Segment Reporting Information [Line Items]
Net Sales	77,240	46,090	202,250	137,890
Operating profit (loss)	18,240	10,240	44,700	37,140
Energy [Member]
Segment Reporting Information [Line Items]
Net Sales	45,460	42,690	143,220	125,810
Operating profit (loss)	3,780	4,560	14,520	14,920
Aerospace & Defense [Member]
Segment Reporting Information [Line Items]
Net Sales	20,810	20,330	58,000	60,160
Operating profit (loss)	6,030	5,420	15,710	14,000
Engineered Components [Member]
Segment Reporting Information [Line Items]
Net Sales	51,880	46,010	154,180	126,870
Operating profit (loss)	6,310	7,730	22,620	19,010
Cequent Asia Pacific [Member]
Segment Reporting Information [Line Items]
Net Sales	37,480	26,020	94,230	67,390
Operating profit (loss)	3,950	5,250	9,000	9,720
Cequent Americas [Member]
Segment Reporting Information [Line Items]
Net Sales	103,000	96,520	319,990	306,190
Operating profit (loss)	8,430	9,580	28,090	30,630
Corporate [Member]
Segment Reporting Information [Line Items]
Operating profit (loss)	$ (10,140)	$ (6,990)	$ (26,100)	$ (20,500)