Income Taxes (Income Tax Expense (Benefit) Allocated Directly to Ferro Corporation Shareholders' Equity) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Abstract]
Interest rate swaps	$ (3,210)	$ (1,529)	$ 547
Postretirement benefit liability adjustments	11	(32)	1
Net investment hedge	654	954	(4,025)
Foreign currency translations	27
Total income tax (benefit) expense allocated to Ferro Corporation shareholders' equity	$ (2,518)	$ (607)	$ (3,477)