PROPERTY PLANT AND EQUIPMENT (NARRATIVE) (DETAILS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Depreciation and amortization expense for property, plant and equipment	$ 59,100	$ 54,000	$ 46,900
Property, plant and equipment, net	151,037	168,289
Software Development [Member]
Property, plant and equipment, net	$ 10,100	$ 18,400