Restructuring, Acquisition, and Integration-Related Costs (Related Costs Restructuring Reserve) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Restructuring Reserve [Roll Forward]
Beginning balance	$ 1,095	$ 11,426
Provision	58,991	37,085	$ 38,463
Cash payments	(43,716)	(39,833)
Non-cash items	(7,858)	(7,583)
Ending balance	8,513	1,095	11,426
Lease impairments
Restructuring Reserve [Roll Forward]
Beginning balance	359	0
Cash payments	(726)	(449)
Non-cash items	0	0
Ending balance	397	359	0
Asset write-downs
Restructuring Reserve [Roll Forward]
Beginning balance	0	0
Cash payments	0	(190)
Non-cash items	(4,071)	(7,309)
Ending balance	0	0	0
Severance
Restructuring Reserve [Roll Forward]
Beginning balance	584	5,183
Cash payments	(12,605)	(9,469)
Non-cash items	(230)	(230)
Ending balance	7,866	584	5,183
Other restructuring costs
Restructuring Reserve [Roll Forward]
Beginning balance	152	6,243
Cash payments	(30,385)	(29,725)
Non-cash items	(3,557)	(44)
Ending balance	250	152	$ 6,243
Corporate
Restructuring Reserve [Roll Forward]
Provision	3,278	114
Corporate | Lease impairments
Restructuring Reserve [Roll Forward]
Provision	0	0
Corporate | Asset write-downs
Restructuring Reserve [Roll Forward]
Provision	0	0
Corporate | Severance
Restructuring Reserve [Roll Forward]
Provision	3,278	0
Corporate | Other restructuring costs
Restructuring Reserve [Roll Forward]
Provision	0	114
Operating segments | Global Ceramic
Restructuring Reserve [Roll Forward]
Provision	9,109	1,542
Operating segments | Global Ceramic | Lease impairments
Restructuring Reserve [Roll Forward]
Provision	528	492
Operating segments | Global Ceramic | Asset write-downs
Restructuring Reserve [Roll Forward]
Provision	1,131	0
Operating segments | Global Ceramic | Severance
Restructuring Reserve [Roll Forward]
Provision	7,113	1,082
Operating segments | Global Ceramic | Other restructuring costs
Restructuring Reserve [Roll Forward]
Provision	337	(32)
Operating segments | Flooring NA
Restructuring Reserve [Roll Forward]
Provision	41,968	31,796
Operating segments | Flooring NA | Lease impairments
Restructuring Reserve [Roll Forward]
Provision	236	316
Operating segments | Flooring NA | Asset write-downs
Restructuring Reserve [Roll Forward]
Provision	2,940	6,849
Operating segments | Flooring NA | Severance
Restructuring Reserve [Roll Forward]
Provision	4,985	2,500
Operating segments | Flooring NA | Other restructuring costs
Restructuring Reserve [Roll Forward]
Provision	33,807	22,131
Operating segments | Flooring ROW
Restructuring Reserve [Roll Forward]
Provision	4,637	3,633
Operating segments | Flooring ROW | Lease impairments
Restructuring Reserve [Roll Forward]
Provision	0	0
Operating segments | Flooring ROW | Asset write-downs
Restructuring Reserve [Roll Forward]
Provision	0	650
Operating segments | Flooring ROW | Severance
Restructuring Reserve [Roll Forward]
Provision	4,741	1,518
Operating segments | Flooring ROW | Other restructuring costs
Restructuring Reserve [Roll Forward]
Provision	$ (104)	$ 1,465