Reporting For Segments (Net Sales To External Customers By Segment) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net sales	$ 416,239	$ 348,632	$ 821,771	$ 669,187
Performance Coatings [Member]
Net sales	193,449	151,746	378,097	278,311
Performance Colors And Glass [Member]
Net sales	126,027	106,637	246,532	210,155
Color Solutions [Member]
Net sales	$ 96,763	$ 90,249	$ 197,142	$ 180,721