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Goodwill and intangible assets (Tables) | 9 Months Ended
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Sep. 27, 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 or adjusted during the period |  |  |  | (2,497 | ) |  | 7,775 |  |  | 5,278 |
Currency translation during the period |  |  |  | (23,549 | ) |  | (49,301 | ) |  | (72,850 | )
Balance as of September 27, 2014 |  |  |  |  |  |  |
Goodwill | $ | 199,132 |  |  | 1,433,766 |  |  | 1,363,047 |  |  | 2,995,945 |
Accumulated impairment losses | (199,132 | ) |  | (531,930 | ) |  | (596,363 | ) |  | (1,327,425 | )
| $ | — |  |  | 901,836 |  |  | 766,684 |  |  | 1,668,520 |
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 | (41,832 | )
Balance as of September 27, 2014 | $ | 658,760 |
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 | (18,825 | ) |  | (24,957 | ) |  | (6 | ) |  | (43,788 | )
Balance as of September 27, 2014 | $ | 364,534 |  |  | 282,229 |  |  | 1,495 |  |  | 648,258 |
Accumulated amortization: | Customer relationships |  | Patents |  | Other |  | Total
Balance as of December 31, 2013 | $ | 342,361 |  |  | 238,115 |  |  | 560 |  |  | 581,036 |
Amortization during the period | 5,225 |  |  | 13,369 |  |  | 93 |  |  | 18,687 |
Currency translation during the period | (18,811 | ) |  | (20,194 | ) |  | (4 | ) |  | (39,009 | )
Balance as of September 27, 2014 | $ | 328,775 |  |  | 231,290 |  |  | 649 |  |  | 560,714 |
Intangible assets subject to amortization, net | $ | 35,759 |  |  | 50,939 |  |  | 846 |  |  | 87,544 |
Schedule of intangible assets amortization expense |
| Three Months Ended |  | Nine Months Ended
| September 27, 2014 |  | September 28, 2013 |  | September 27, 2014 |  | September 28, 2013
Amortization expense | $ | 6,140 |  |  | 13,288 |  |  | 18,687 |  |  | 19,262 |

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