Information on Business Segments (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 1,193,975	$ 1,262,006	$ 1,091,566
Long-lived assets	1,449,100	1,475,400	1,544,200
Aerospace [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	411,700	440,000	404,000
Industrial [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	782,300	822,100	687,600
Domestic [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	589,600	618,900	593,300
Long-lived assets	379,200	380,600	330,200
International [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	661,700	677,600	524,100
Long-lived assets	1,069,900	1,094,900	1,214,000
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	(57,300)	(34,500)	(25,900)
Long-lived assets	$ 0	0	0
Sales from international locations to domestic locations	82.00%
Singapore [Member] | Aerospace [Member] | Intangible Assets [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 246,400	255,300	255,300
China [Member] | Industrial [Member] | Goodwill and Intangible Assets [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets		151,700	156,400
Germany [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	210,500	249,900	140,800
Germany [Member] | Industrial [Member] | Goodwill, Property Plant and Equipment and Intangible Assets [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	362,700	410,000	477,300
Switzerland [Member] | Industrial [Member] | Goodwill And Property Plant And Equipment [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 167,000	$ 165,700	$ 193,800