Discontinued Operations (Summary of Statements of Operations as Discontinued Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from discontinued operations, net of income taxes	$ 77,199	$ 14,003	$ (27,411)
Less: Net income attributable to noncontrolling interests	64	171	290
Net income (loss) attributable to Tile Coatings business	77,135	13,832	(27,701)
Tile Coatings Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale of business, net	(94,800)
Discontinued Operations | Tile Coatings Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales	83,579	440,501	491,493
Cost of sales	60,634	327,505	388,959
Gross profit	22,945	112,996	102,534
Selling, general and administrative expenses	20,327	72,033	71,591
Restructuring and impairment charges	303	2,290	44,378
Interest expense	1,682	10,650	11,556
Interest earned	(189)	(184)	(122)
Foreign currency losses (gains), net	363	6,608	(2,397)
Gain on sale of business, net	(94,832)	0	0
Miscellaneous expense, net	251	2,281	2,127
Income (loss) from discontinued operations before income taxes	95,040	19,318	(24,599)
Income tax expense	17,841	5,315	2,812
Income (loss) from discontinued operations, net of income taxes	77,199	14,003	(27,411)
Less: Net income attributable to noncontrolling interests	64	171	290
Net income (loss) attributable to Tile Coatings business	$ 77,135	$ 13,832	$ (27,701)