Details of Certain Consolidated Balance Sheet Captions (Property, Plant and Equipment, net) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 1,639,829	$ 1,606,957
Less: accumulated depreciation	(968,033)	(882,152)
Property, plant and equipment, net	671,796	724,805
Engineered Product Division
Property, Plant and Equipment [Line Items]
Asset Impairment Charges	26,000
Land
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	84,551	81,022
Buildings and improvements
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	470,354	442,756
Machinery, equipment and tooling
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	682,316	669,639
Software, furniture and fixtures and other
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 402,608	$ 413,540