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Goodwill and intangible assets (Tables) | 6 Months Ended
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Jun. 28, 2014
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of goodwill | Goodwill:
| Carpet segment |  | Ceramic segment |  | Laminate and Wood segment |  | Total
Balance as of December 31, 2013 |  |  |  |  |  |  |
Goodwill | $ | 199,132 |  |  | 1,459,812 |  |  | 1,404,573 |  |  | 3,063,517 |
Accumulated impairment losses | (199,132 | ) |  | (531,930 | ) |  | (596,363 | ) |  | (1,327,425 | )
| $ | — |  |  | 927,882 |  |  | 808,210 |  |  | 1,736,092 |
Goodwill recognized during the period |  |  |  | (2,497 | ) |  | 7,775 |  |  | 5,278 |
Currency translation during the period |  |  |  | (4,768 | ) |  | (5,889 | ) |  | (10,657 | )
Balance as of June 28, 2014 |  |  |  |  |  |  |
Goodwill | $ | 199,132 |  |  | 1,452,547 |  |  | 1,406,459 |  |  | 3,058,138 |
Accumulated impairment losses | (199,132 | ) |  | (531,930 | ) |  | (596,363 | ) |  | (1,327,425 | )
| $ | — |  |  | 920,617 |  |  | 810,096 |  |  | 1,730,713 |
Schedule of indefinite life assets not subject to amortization | Intangible assets not subject to amortization:
| Tradenames
Balance as of December 31, 2013 | $ | 700,592 |
Currency translation during the period | (6,242 | )
Balance as of June 28, 2014 | $ | 694,350 |
Schedule of intangible assets subject to amortization | Intangible assets subject to amortization:
Gross carrying amounts: | Customer relationships |  | Patents |  | Other |  | Total
Balance as of December 31, 2013 | $ | 383,359 |  |  | 307,186 |  |  | 1,501 |  |  | 692,046 |
Currency translation during the period | (2,295 | ) |  | (3,494 | ) |  | 13 |  |  | (5,776 | )
Balance as of June 28, 2014 | $ | 381,064 |  |  | 303,692 |  |  | 1,514 |  |  | 686,270 |
Accumulated amortization: | Customer relationships |  | Patents |  | Other |  | Total
Balance as of December 31, 2013 | $ | 342,361 |  |  | 238,115 |  |  | 560 |  |  | 581,036 |
Amortization during the period | 3,528 |  |  | 8,957 |  |  | 62 |  |  | 12,547 |
Currency translation during the period | (2,503 | ) |  | (2,726 | ) |  | 6 |  |  | (5,223 | )
Balance as of June 28, 2014 | $ | 343,386 |  |  | 244,346 |  |  | 628 |  |  | 588,360 |
Intangible assets subject to amortization, net | $ | 37,678 |  |  | 59,346 |  |  | 886 |  |  | 97,910 |
Schedule of intangible assets amortization expense |
| Three Months Ended |  | Six Months Ended
| June 28, 2014 |  | June 29, 2013 |  | June 28, 2014 |  | June 29, 2013
Amortization expense | $ | 6,509 |  |  | 6,774 |  |  | 12,547 |  |  | 12,748 |

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