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Note 13 - Taxes on Income (Details) - Effective Income Tax Rate Reconciliation (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 28, 2014 | Dec. 29, 2013 | Dec. 30, 2012
Note 13 - Taxes on Income (Details) - Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Income taxes at U.S federal statutory rate | $ 12,510 us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | $ 24,151 us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | $ 13,336 us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
Increase (decrease) in taxes resulting from: |  |  |
State income taxes, net of federal tax effect | 57 us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes | 496 us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes | 1,116 us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes
Non-deductible business expenses | 570 us-gaap_IncomeTaxReconciliationNondeductibleExpenseOther | 601 us-gaap_IncomeTaxReconciliationNondeductibleExpenseOther | 1,009 us-gaap_IncomeTaxReconciliationNondeductibleExpenseOther
Non-deductible employee compensation | 491 tile_IncomeTaxReconciliationNonDeductibleCompensation | 409 tile_IncomeTaxReconciliationNonDeductibleCompensation | 469 tile_IncomeTaxReconciliationNonDeductibleCompensation
Tax effects of Company owned life insurance | (395)us-gaap_IncomeTaxReconciliationNondeductibleExpenseLifeInsurance | (1,117)us-gaap_IncomeTaxReconciliationNondeductibleExpenseLifeInsurance | (448)us-gaap_IncomeTaxReconciliationNondeductibleExpenseLifeInsurance
Tax effects of undistributed earnings from foreign subsidiaries not deemed to be indefinitely reinvested | 362 tile_IncomeTaxReconciliationNondeductibleUndistributedEarningsFromForeignSubsidiaries | 562 tile_IncomeTaxReconciliationNondeductibleUndistributedEarningsFromForeignSubsidiaries | 321 tile_IncomeTaxReconciliationNondeductibleUndistributedEarningsFromForeignSubsidiaries
Foreign and U.S. tax effects attributable to foreign operations | (3,021)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential | (3,958)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential | (1,174)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential
Valuation allowance effect – State NOL | 468 us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance | 3,232 us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance | (187)us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
Non-deductible reserve against capital asset | 0 tile_IncomeTaxReconciliationTaxReserveAdjustment | (218)tile_IncomeTaxReconciliationTaxReserveAdjustment | 1,188 tile_IncomeTaxReconciliationTaxReserveAdjustment
Advance pricing agreements with tax authorities | 0 tile_IncomeTaxReconciliationAdvancePricingAgreementsWithTaxAuthorities | (2,492)tile_IncomeTaxReconciliationAdvancePricingAgreementsWithTaxAuthorities | 0 tile_IncomeTaxReconciliationAdvancePricingAgreementsWithTaxAuthorities
Federal tax credits | 0 us-gaap_IncomeTaxReconciliationTaxCredits | (595)us-gaap_IncomeTaxReconciliationTaxCredits | (891)us-gaap_IncomeTaxReconciliationTaxCredits
Other | (108)us-gaap_IncomeTaxReconciliationOtherAdjustments | (322)us-gaap_IncomeTaxReconciliationOtherAdjustments | 465 us-gaap_IncomeTaxReconciliationOtherAdjustments
Income tax expense | 10,934 us-gaap_IncomeTaxExpenseBenefit | 20,749 us-gaap_IncomeTaxExpenseBenefit | 15,204 us-gaap_IncomeTaxExpenseBenefit
Continuing Operations [Member] |  |  |
Increase (decrease) in taxes resulting from: |  |  |
Income tax expense | $ 10,934 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | $ 20,749 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | $ 15,204 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember

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- Definition Income tax reconciliation, advance pricing agreements with tax authorities. + References No definition available. + Details
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- Definition Income Tax Reconciliation Non Deductible Compensation + References No definition available. + Details
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- Definition Income Tax Reconciliation Nondeductible Undistributed Earnings From Foreign Subsidiaries + References No definition available. + Details
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- Definition Income Tax Reconciliation Tax Reserve Adjustment + References No definition available. + Details
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Income Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6515339 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=37586315&loc=d3e32123-109318 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign income tax expense (benefit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 1 -Article 4 + Details
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- Definition The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 2 -Article 4 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible life insurance expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax credits. Including, but not limited to, research credit, foreign tax credit, investment tax credit, and other tax credits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 + Details
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