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Goodwill and intangible assets (Tables) | 3 Months Ended
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Apr. 04, 2015
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of goodwill | Goodwill:
| Carpet segment |  | Ceramic segment |  | Laminate and Wood segment |  | Total
Balance as of December 31, 2014 |  |  |  |  |  |  |
Goodwill | $ | 199,132 |  |  | 1,395,132 |  |  | 1,337,513 |  |  | 2,931,777 |
Accumulated impairment losses | (199,132 | ) |  | (531,930 | ) |  | (596,363 | ) |  | (1,327,425 | )
| $ | — |  |  | 863,202 |  |  | 741,150 |  |  | 1,604,352 |
Goodwill recognized or adjusted during the period | $ | — |  |  | — |  |  | 2,659 |  |  | 2,659 |
Currency translation during the period | — |  |  | (1,185 | ) |  | (52,671 | ) |  | (53,856 | )
Balance as of April 4, 2015 |  |  |  |  |  |  |
Goodwill | 199,132 |  |  | 1,393,947 |  |  | 1,287,501 |  |  | 2,880,580 |
Accumulated impairment losses | (199,132 | ) |  | (531,930 | ) |  | (596,363 | ) |  | (1,327,425 | )
| $ | — |  |  | 862,017 |  |  | 691,138 |  |  | 1,553,155 |
Schedule of indefinite life assets not subject to amortization | Intangible assets not subject to amortization:
| Tradenames
Balance as of December 31, 2014 | $ | 622,691 |
Currency translation during the period | (30,653 | )
Balance as of April 4, 2015 | $ | 592,038 |
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, 2014 | $ | 354,768 |  |  | 270,466 |  |  | 1,479 |  |  | 626,713 |
Currency translation during the period | (20,157 | ) |  | (26,351 | ) |  | (15 | ) |  | (46,523 | )
Balance as of April 4, 2015 | $ | 334,611 |  |  | 244,115 |  |  | 1,464 |  |  | 580,190 |
Accumulated amortization: | Customer relationships |  | Patents |  | Other |  | Total
Balance as of December 31, 2014 | $ | 320,851 |  |  | 225,875 |  |  | 669 |  |  | 547,395 |
Amortization during the period | 1,671 |  |  | 3,405 |  |  | 30 |  |  | 5,106 |
Currency translation during the period | (20,014 | ) |  | (22,095 | ) |  | (10 | ) |  | (42,119 | )
Balance as of April 4, 2015 | $ | 302,508 |  |  | 207,185 |  |  | 689 |  |  | 510,382 |
Intangible assets subject to amortization, net | $ | 32,103 |  |  | 36,930 |  |  | 775 |  |  | 69,808 |
Schedule of intangible assets amortization expense |
| Three Months Ended
| April 4, 2015 |  | March 29, 2014
Amortization expense | $ | 5,106 |  |  | 6,038 |

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