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Commitments, contingencies and other (Narrative) (Details) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended | 0 Months Ended | 3 Months Ended |  | 1 Months Ended | 0 Months Ended
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Jun. 29, 2013 Cost of Sales [Member] USD ($) | Jun. 30, 2012 Cost of Sales [Member] USD ($) | Jun. 29, 2013 Cost of Sales [Member] USD ($) | Jun. 30, 2012 Cost of Sales [Member] USD ($) | Jan. 30, 2013 BELGIUM Foreign Tax Authority [Member] EUR (€) | Jun. 30, 2012 BELGIUM Foreign Tax Authority [Member] EUR (€) | Dec. 28, 2012 BELGIUM Foreign Tax Authority [Member] EUR (€) | Jan. 31, 2012 BELGIUM Foreign Tax Authority [Member] Two Thousand and Eight [Member] EUR (€) | Dec. 28, 2012 BELGIUM Foreign Tax Authority [Member] Two Thousand and Five [Member] EUR (€) | Dec. 28, 2012 BELGIUM Foreign Tax Authority [Member] Two Thousand and Nine [Member] EUR (€)
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assessment received from Belgian tax authority (in euros) |  |  |  |  |  |  |  |  |  |  |  | € 23,789 | € 46,135 | € 35,567
Interest on assessment (in euros) |  |  |  |  |  |  |  |  |  | 2,912 |  |  |  |
Refund of interest deposit |  |  |  |  |  |  |  |  | 2,912 |  | 23,789 |  |  |
Interest Tax Examination, Refund, Interest Income |  |  |  |  |  |  |  |  | 1,583 |  |  |  |  |
Pre-tax business restructuring charges | $ 11,324 | [1] | $ 6,636 | [2] | $ 14,330 | [1] | $ 6,636 | [2] |  |  |  |  |  |
[1] | The restructuring costs for 2013 primarily relate to the Company’s actions taken to lower its cost structure and improve efficiencies of manufacturing operations and administrative functions, as well as actions related to the Company's acquisition of Pergo, Spano and Marazzi.
[2] | The charges for 2012 primarily relate to the Company's actions taken to to lower its cost structure and improve efficiencies of manufacturing and distribution operations as the Company adjusted to changing economic conditions.

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- Definition The amount of the additional liability or refund received or expected based on a final settlement with a taxing authority. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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- Definition Net total Increase or Decrease in the accrual for restructuring costs during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 95-3 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=6394695&loc=d3e140904-122747 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 146 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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