Restructuring, acquisition and integration-related costs - Restructuring Reserve (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2017	Apr. 02, 2016
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2016	$ 11,426
Provision	3,025	$ 5,253
Cash payments	(7,648)
Non-cash items	(375)
Balance as of April 1, 2017	6,428
Asset write-downs
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2016	0
Cash payments	(47)
Non-cash items	(254)
Balance as of April 1, 2017	0
Severance
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2016	5,183
Cash payments	(2,971)
Non-cash items	15
Balance as of April 1, 2017	2,456
Other restructuring costs
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2016	6,243
Cash payments	(4,630)
Non-cash items	(136)
Balance as of April 1, 2017	3,972
Operating segments | Provision - Global Ceramic segment
Restructuring Reserve [Roll Forward]
Provision	58
Operating segments | Provision - Global Ceramic segment | Asset write-downs
Restructuring Reserve [Roll Forward]
Provision	0
Operating segments | Provision - Global Ceramic segment | Severance
Restructuring Reserve [Roll Forward]
Provision	0
Operating segments | Provision - Global Ceramic segment | Other restructuring costs
Restructuring Reserve [Roll Forward]
Provision	58
Operating segments | Provision - Flooring NA segment
Restructuring Reserve [Roll Forward]
Provision	2,227
Operating segments | Provision - Flooring NA segment | Asset write-downs
Restructuring Reserve [Roll Forward]
Provision	258
Operating segments | Provision - Flooring NA segment | Severance
Restructuring Reserve [Roll Forward]
Provision	0
Operating segments | Provision - Flooring NA segment | Other restructuring costs
Restructuring Reserve [Roll Forward]
Provision	1,969
Operating segments | Provision - Flooring ROW segment
Restructuring Reserve [Roll Forward]
Provision	740
Operating segments | Provision - Flooring ROW segment | Asset write-downs
Restructuring Reserve [Roll Forward]
Provision	43
Operating segments | Provision - Flooring ROW segment | Severance
Restructuring Reserve [Roll Forward]
Provision	229
Operating segments | Provision - Flooring ROW segment | Other restructuring costs
Restructuring Reserve [Roll Forward]
Provision	$ 468