Information on Business Segments (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 1,230,754	$ 1,193,975	$ 1,262,006
Long-lived assets	$ 1,503,600	1,449,100	1,475,400
Sales from international locations to domestic locations	82.00%
Domestic [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 562,600	589,600	618,900
Long-lived assets	368,200	379,200	380,600
International [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	727,400	661,700	677,600
Long-lived assets	1,135,500	1,069,900	1,094,900
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	(59,200)	(57,300)	(34,500)
Long-lived assets	0	0	0
Singapore [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	238,300	246,400	255,300
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets			151,700
Germany [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	238,300	210,500	249,900
Long-lived assets	449,900	362,700	410,000
Switzerland [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	169,300	167,000	165,700
Engineered Components Products [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	332,600	342,200	373,100
Molding Solutions Products [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	376,600	324,600	322,700
Nitrogen Gas Products [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	115,000	115,500	126,200
Aerospace Original Equipment Manufacturing Products [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	288,400	295,700	329,600
Aerospace Aftermarket Products and Services [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 118,200	$ 116,000	$ 110,400