Earnings Per Share (Calculations Of Basic And Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Basic earnings per share computation:
Income from continuing operations	$ 35,392	$ 56,920	$ 36,902
Less: Net income attributable to noncontrolling interests from continuing operations	1,087	851	704
Net income attributable to Ferro Corporation from continuing operations	34,305	56,069	36,198
Income (loss) from discontinued operations, net of income taxes	(27,977)	24,026	20,866
Less: Net income attributable to noncontrolling interests from discontinued operations	290	2	10
Net income (loss) attributable to Ferro Corporation from discontinued operations	(28,267)	24,024	20,856
Total	$ 6,038	$ 80,093	$ 57,054
Weighted-average common shares outstanding	82,083	83,940	83,713
Basic earnings per share from continuing operations attributable to Ferro Corporation common shareholders	$ 0.41	$ 0.67	$ 0.43
Diluted earnings per share computation:
Net income attributable to Ferro Corporation common shareholders	$ 34,305	$ 56,069	$ 36,198
Adjustment for income from discontinued operations	(28,267)	24,024	20,856
Total	$ 6,038	$ 80,093	$ 57,054
Weighted-average common shares outstanding	82,083	83,940	83,713
Assumed exercise of stock options	407	772	762
Assumed satisfaction of restricted stock unit conditions	369	301	351
Assumed satisfaction of performance stock unit conditions	32	72	330
Weighted-average diluted shares outstanding	82,891	85,085	85,156
Diluted earnings per share from continuing operations attributable to Ferro Corporation common shareholders	$ 0.41	$ 0.66	$ 0.43