SIGNIFICANT ACCOUNTING POLICIES (Property, Plant and Equipment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Land	$ 46,219	$ 45,775
Buildings	335,885	362,325
Machinery and equipment	706,938	696,849
Property, Plant and Equipment, Gross	1,089,042	1,104,949
Less accumulated depreciation	716,665	693,626
Property, Plant and Equipment, Net	$ 372,377	$ 411,323	$ 438,746
Machinery, tools and equipment | Minimum
Property, Plant and Equipment [Line Items]
Useful life of property, plant and equipment	3 years
Machinery, tools and equipment | Maximum
Property, Plant and Equipment [Line Items]
Useful life of property, plant and equipment	20 years
Buildings | Maximum
Property, Plant and Equipment [Line Items]
Useful life of property, plant and equipment	40 years