Restructuring, acquisition and integration-related costs - Restructuring Reserve (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 02, 2016	Apr. 04, 2015
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2015	$ 10,030
Provision	5,253	$ 6,657
Cash payments	(8,735)
Non-cash items	(917)
Balance as of April 2, 2016	$ 5,631
Period in which lease impairments, severance and other restructuring costs are expected to be paid	4 years
Asset write-downs [Member]
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2015	$ 0
Cash payments	0
Non-cash items	(849)
Balance as of April 2, 2016	0
Severance [Member]
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2015	8,965
Cash payments	(4,083)
Non-cash items	0
Balance as of April 2, 2016	5,195
Other restructuring costs [Member]
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2015	1,065
Cash payments	(4,652)
Non-cash items	(68)
Balance as of April 2, 2016	436
Operating Segments [Member] | Global Ceramic Segment [Member]
Restructuring Reserve [Roll Forward]
Provision	695
Operating Segments [Member] | Global Ceramic Segment [Member] | Asset write-downs [Member]
Restructuring Reserve [Roll Forward]
Provision	795
Operating Segments [Member] | Global Ceramic Segment [Member] | Severance [Member]
Restructuring Reserve [Roll Forward]
Provision	0
Operating Segments [Member] | Global Ceramic Segment [Member] | Other restructuring costs [Member]
Restructuring Reserve [Roll Forward]
Provision	(100)
Operating Segments [Member] | Flooring NA Segment [Member]
Restructuring Reserve [Roll Forward]
Provision	3,672
Operating Segments [Member] | Flooring NA Segment [Member] | Asset write-downs [Member]
Restructuring Reserve [Roll Forward]
Provision	54
Operating Segments [Member] | Flooring NA Segment [Member] | Severance [Member]
Restructuring Reserve [Roll Forward]
Provision	0
Operating Segments [Member] | Flooring NA Segment [Member] | Other restructuring costs [Member]
Restructuring Reserve [Roll Forward]
Provision	3,618
Operating Segments [Member] | Flooring ROW Segment [Member]
Restructuring Reserve [Roll Forward]
Provision	886
Operating Segments [Member] | Flooring ROW Segment [Member] | Asset write-downs [Member]
Restructuring Reserve [Roll Forward]
Provision	0
Operating Segments [Member] | Flooring ROW Segment [Member] | Severance [Member]
Restructuring Reserve [Roll Forward]
Provision	313
Operating Segments [Member] | Flooring ROW Segment [Member] | Other restructuring costs [Member]
Restructuring Reserve [Roll Forward]
Provision	$ 573