Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Segment Reporting Information [Line Items]
Net Sales	$ 338,430	$ 288,090	$ 636,000	$ 546,650
Operating profit (loss)	43,200	40,780	71,940	69,130
Packaging [Member]
Segment Reporting Information [Line Items]
Net Sales	70,700	47,900	125,010	91,800
Operating profit (loss)	16,570	15,070	26,460	26,900
Energy [Member]
Segment Reporting Information [Line Items]
Net Sales	47,170	42,170	97,760	83,120
Operating profit (loss)	4,350	5,020	10,740	10,360
Aerospace & Defense [Member]
Segment Reporting Information [Line Items]
Net Sales	19,330	21,330	37,190	39,830
Operating profit (loss)	4,820	4,860	9,680	8,580
Engineered Components [Member]
Segment Reporting Information [Line Items]
Net Sales	52,620	43,860	102,300	80,860
Operating profit (loss)	8,600	6,620	16,310	11,280
Cequent Asia Pacific [Member]
Segment Reporting Information [Line Items]
Net Sales	28,550	21,560	56,750	41,370
Operating profit (loss)	2,010	1,940	5,050	4,470
Cequent North America [Member]
Segment Reporting Information [Line Items]
Net Sales	120,060	111,270	216,990	209,670
Operating profit (loss)	15,500	14,380	19,660	21,050
Corporate [Member]
Segment Reporting Information [Line Items]
Operating profit (loss)	$ (8,650)	$ (7,110)	$ (15,960)	$ (13,510)