Earnings Per Share (Calculations Of Basic And Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Basic earnings per share computation:
Income from continuing operations	$ 9,547	$ 16,730	$ 23,533	$ 36,892
Less: Net income attributable to noncontrolling interests from continuing operations	451	298	793	660
Net income attributable to Ferro Corporation from continuing operations	9,096	16,432	22,740	36,232
Income (loss) from discontinued operations, net of income taxes	5,367	(3,520)	2,350	1,305
Less: Net income attributable to noncontrolling interests from discontinued operations	(11)	92	33	242
Net income (loss) attributable to Ferro Corporation from discontinued operations	5,378	(3,612)	2,317	1,063
Net income attributable to Ferro Corporation common shareholders	$ 14,474	$ 12,820	$ 25,057	$ 37,295
Weighted-average common shares outstanding	82,261	81,942	82,201	82,118
Basic earnings per share from continuing operations attributable to Ferro Corporation common shareholders	$ 0.11	$ 0.20	$ 0.28	$ 0.44
Diluted earnings per share computation:
Net income attributable to Ferro Corporation from continuing operations	$ 9,096	$ 16,432	$ 22,740	$ 36,232
Net income (loss) attributable to Ferro Corporation from discontinued operations	5,378	(3,612)	2,317	1,063
Total	$ 14,474	$ 12,820	$ 25,057	$ 37,295
Weighted-average common shares outstanding	82,261	81,942	82,201	82,118
Assumed exercise of stock options	272	319	260	470
Assumed satisfaction of restricted stock unit conditions	157	143	300	232
Assumed satisfaction of performance stock unit conditions	81	91	130	136
Weighted-average diluted shares outstanding	82,771	82,495	82,891	82,956
Diluted earnings per share from continuing operations attributable to Ferro Corporation common shareholders	$ 0.11	$ 0.20	$ 0.27	$ 0.44