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Segment reporting (Details) $ in Thousands | 3 Months Ended |
--- | --- | ---
Apr. 02, 2016 USD ($) segment | Apr. 04, 2015 USD ($) | Dec. 31, 2015 USD ($)
Segment Reporting [Abstract] |  |  |
Number of reportable segments | segment | 3 |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | $ 2,172,046 | $ 1,881,177 |
Operating income (loss) | 245,672 | 43,774 |
Assets | 10,292,315 |  | $ 9,934,400
Operating Segments [Member] | Global Ceramic Segment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 773,726 | 719,828 |
Operating income (loss) | 99,777 | 85,327 |
Assets | 3,988,285 |  | 3,846,133
Operating Segments [Member] | Flooring NA Segment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 906,364 | 846,911 |
Operating income (loss) | 75,351 | (75,192) |
Assets | 3,267,529 |  | 3,164,525
Operating Segments [Member] | Flooring ROW Segment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 491,956 | 314,742 |
Operating income (loss) | 79,537 | 44,641 |
Assets | 2,926,959 |  | 2,805,246
Intersegment Sales [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 0 | (304) |
Corporate And Intersegment Eliminations [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating income (loss) | (8,993) | $ (11,002) |
Assets | $ 109,542 |  | $ 118,496

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