Segment Information Operating Net Assets by Segment (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting, Asset Reconciling Item [Line Items]
Operating Net Assets	$ 1,351,830	$ 1,039,270	$ 883,760
Current Liabilities	309,920	261,510	247,200
Consolidated Assets	1,661,750	1,300,780	1,130,960
Continuing Operations [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Operating Net Assets	1,351,830	1,039,270	883,760
Continuing Operations [Member] | Packaging [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Operating Net Assets	398,530	377,480	376,040
Continuing Operations [Member] | Energy [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Operating Net Assets	170,430	180,410	158,710
Continuing Operations [Member] | Aerospace [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Operating Net Assets	498,560	150,750	80,620
Continuing Operations [Member] | Engineered Components [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Operating Net Assets	65,910	73,780	68,870
Continuing Operations [Member] | Cequent Asia Pacific Europe Africa [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Operating Net Assets	75,290	81,120	51,790
Continuing Operations [Member] | Cequent Americas [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Operating Net Assets	151,760	164,590	145,360
Continuing Operations [Member] | Corporate [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Operating Net Assets	$ (8,650)	$ 11,140	$ 2,370