Goodwill And Other Intangible Assets (Details and Activity of Goodwill by Segment) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill, net, beginning balance	$ 195,369
Acquisitions	1,291
Foreign currency adjustments	1,878
Goodwill, net, ending balance	198,538
Performance Coatings [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill, net, beginning balance	38,236
Foreign currency adjustments	803
Goodwill, net, ending balance	39,039
Color Solutions [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill, net, beginning balance	42,535
Foreign currency adjustments	309
Goodwill, net, ending balance	42,844
Performance Colors And Glass [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill, net, beginning balance	114,598
Acquisitions	1,291
Foreign currency adjustments	766
Goodwill, net, ending balance	$ 116,655