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Goodwill and intangible assets (Tables) | 6 Months Ended
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Jun. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of goodwill | The components of goodwill and other intangible assets are as follows: Goodwill:
| Global Ceramic segment |  | Flooring NA segment |  | Flooring ROW segment |  | Total
Balance as of December 31, 2017 |  |  |  |  |  |  |
Goodwill | $ | 1,567,872 |  |  | 869,764 |  |  | 1,361,248 |  |  | 3,798,884 |
Accumulated impairment losses | (531,930 | ) |  | (343,054 | ) |  | (452,441 | ) |  | (1,327,425 | )
| $ | 1,035,942 |  |  | 526,710 |  |  | 908,807 |  |  | 2,471,459 |
Goodwill recognized during the period | $ | — |  |  | — |  |  | 12,548 |  |  | 12,548 |
Currency translation during the period | $ | (11,342 | ) |  | — |  |  | (25,619 | ) |  | (36,961 | )
Balance as of June 30, 2018 |  |  |  |  |  |  |
Goodwill | $ | 1,556,530 |  |  | 869,764 |  |  | 1,348,177 |  |  | 3,774,471 |
Accumulated impairment losses | (531,930 | ) |  | (343,054 | ) |  | (452,441 | ) |  | (1,327,425 | )
| $ | 1,024,600 |  |  | 526,710 |  |  | 895,736 |  |  | 2,447,046 |
Schedule of indefinite life assets not subject to amortization | Intangible assets not subject to amortization:
| Tradenames
Balance as of December 31, 2017 | $ | 644,208 |
Intangible assets acquired during the period | — |
Currency translation during the period | (13,843 | )
Balance as of June 30, 2018 | $ | 630,365 |
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, 2017 | $ | 625,263 |  |  | 266,969 |  |  | 6,825 |  |  | 899,057 |
Intangible assets recognized during the period | — |  |  | — |  |  | 7 |  |  | 7 |
Currency translation during the period | (11,108 | ) |  | (7,185 | ) |  | (123 | ) |  | (18,416 | )
Balance as of June 30, 2018 | $ | 614,155 |  |  | 259,784 |  |  | 6,709 |  |  | 880,648 |
Accumulated amortization: | Customer relationships |  | Patents |  | Other |  | Total
Balance as of December 31, 2017 | $ | 390,428 |  |  | 259,908 |  |  | 1,162 |  |  | 651,498 |
Amortization during the period | 13,875 |  |  | 1,155 |  |  | 20 |  |  | 15,050 |
Currency translation during the period | (7,051 | ) |  | (7,006 | ) |  | (10 | ) |  | (14,067 | )
Balance as of June 30, 2018 | $ | 397,252 |  |  | 254,057 |  |  | 1,172 |  |  | 652,481 |
Intangible assets subject to amortization, net | $ | 216,903 |  |  | 5,727 |  |  | 5,537 |  |  | 228,167 |
Schedule of intangible assets amortization expense |
| Three Months Ended |  | Six Months Ended
| June 30, 2018 |  | July 1, 2017 |  | June 30, 2018 |  | July 1, 2017
Amortization expense | $ | 7,483 |  |  | 9,322 |  |  | 15,050 |  |  | 19,381 |

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