Goodwill And Other Intangible Assets (Details and Activity of Goodwill by Segment) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2018 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill, net, beginning balance	$ 195,369
Acquisitions	6,431
Foreign currency adjustments	(2,628)
Goodwill, net, ending balance	199,172
Performance Coatings [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill, net, beginning balance	38,236
Acquisitions	5,140
Foreign currency adjustments	(1,348)
Goodwill, net, ending balance	42,028
Color Solutions [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill, net, beginning balance	42,535
Foreign currency adjustments	(445)
Goodwill, net, ending balance	42,090
Performance Colors And Glass [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill, net, beginning balance	114,598
Acquisitions	1,291
Foreign currency adjustments	(835)
Goodwill, net, ending balance	$ 115,054