Revenues (Schedule of Revenues Disaggregated by Product Category) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Total revenue	100.00%	100.00%	100.00%	100.00%
Man-Made Tiles [Member]
Disaggregation of Revenue [Line Items]
Total revenue	50.00%	48.00%	50.00%	47.00%
Natural Stone Tiles [Member]
Disaggregation of Revenue [Line Items]
Total revenue	26.00%	28.00%	25.00%	29.00%
Setting And Maintenance Materials [Member]
Disaggregation of Revenue [Line Items]
Total revenue	15.00%	14.00%	16.00%	14.00%
Accessories [Member]
Disaggregation of Revenue [Line Items]
Total revenue	7.00%	7.00%	7.00%	8.00%
Delivery Service [Member]
Disaggregation of Revenue [Line Items]
Total revenue	2.00%	3.00%	2.00%	2.00%