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Goodwill and intangible assets - Schedule of goodwill (Details) $ in Thousands | 3 Months Ended
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Mar. 31, 2018 USD ($)
Goodwill [Roll Forward] |
Goodwill, gross, beginning balance | $ 3,798,884
Accumulated impairment losses | (1,327,425)
Goodwill, net, beginning balance | 2,471,459
Goodwill recognized during the period | 12,548
Currency translation during the period | 28,608
Goodwill, gross, ending balance | 3,840,040
Accumulated impairment losses | (1,327,425)
Goodwill, net, ending balance | 2,512,615
Global Ceramic segment |
Goodwill [Roll Forward] |
Goodwill, gross, beginning balance | 1,567,872
Accumulated impairment losses | (531,930)
Goodwill, net, beginning balance | 1,035,942
Goodwill recognized during the period | 0
Currency translation during the period | 5,100
Goodwill, gross, ending balance | 1,572,972
Accumulated impairment losses | (531,930)
Goodwill, net, ending balance | 1,041,042
Flooring NA segment |
Goodwill [Roll Forward] |
Goodwill, gross, beginning balance | 869,764
Accumulated impairment losses | (343,054)
Goodwill, net, beginning balance | 526,710
Goodwill recognized during the period | 0
Currency translation during the period | 0
Goodwill, gross, ending balance | 869,764
Accumulated impairment losses | (343,054)
Goodwill, net, ending balance | 526,710
Flooring ROW segment |
Goodwill [Roll Forward] |
Goodwill, gross, beginning balance | 1,361,248
Accumulated impairment losses | (452,441)
Goodwill, net, beginning balance | 908,807
Goodwill recognized during the period | 12,548
Currency translation during the period | 23,508
Goodwill, gross, ending balance | 1,397,304
Accumulated impairment losses | (452,441)
Goodwill, net, ending balance | $ 944,863

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