Reporting For Segments (Segment's Gross Profit And Reconciliations To Income Before Income Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Other cost of sales		$ (295)
Other cost of sales	$ (556)
Total gross profit	118,686	98,794
Selling, general and administrative expenses	73,092	59,446
Restructuring and impairment charges	4,106	3,018
Other expense, net	10,376	7,071
Income before income taxes	31,112	29,259
Performance Coatings [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total gross profit	43,765	33,489
Performance Colors And Glass [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total gross profit	43,328	37,418
Color Solutions [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total gross profit	$ 32,149	$ 28,182