Reporting For Segments (Net Sales To External Customers By Segment) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net sales	$ 268,214	$ 294,217	$ 530,986	$ 574,944
Performance Coatings [Member]
Net sales	139,460	156,789	276,246	301,949
Performance Colors And Glass [Member]
Net sales	98,729	106,109	198,193	209,479
Pigments, Powders And Oxides [Member]
Net sales	$ 30,025	$ 31,319	$ 56,547	$ 63,516