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Note 10 - Shareholders' Equity (Details) (USD $) | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 28, 2014 | Dec. 29, 2013 | Dec. 30, 2012 | Mar. 04, 2012 | May 31, 2010 | Oct. 07, 2014
Note 10 - Shareholders' Equity (Details) [Line Items] |  |  |  |  |  |
Common Stock, Shares Authorized (in Shares) |  |  |  | 120,000,000 us-gaap_CommonStockSharesAuthorized |  |
Common Stock, Par or Stated Value Per Share (in Dollars per share) |  |  |  | $ 0.10 us-gaap_CommonStockParOrStatedValuePerShare |  |
Common Stock, Shares, Issued (in Shares) |  |  |  | 65,372,375 us-gaap_CommonStockSharesIssued |  |
Common Stock, Dividends, Per Share, Cash Paid (in Dollars per share) | $ 0.14 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.11 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.09 us-gaap_CommonStockDividendsPerShareCashPaid |  |  |
Stock Based Compensation Rate at which Employee Stock Option Exercisable | 100.00%tile_StockBasedCompensationRateAtWhichEmployeeStockOptionExercisable |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares) |  |  |  |  | 6,558,263 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized |
Number of Authorized stock, reduce by Issuance by other than Stock Option (in Shares) |  |  |  |  | 1.33 tile_NumberOfAuthorizedStockReduceByIssuanceOfOtherThanStockOptionAward |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term | 5 years |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term | 5 years |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value | $ 900,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value | 900,000 us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value | 600,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue | 1,900,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue | 900,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue |  |  |
Proceeds from Stock Options Exercised | 400,000 us-gaap_ProceedsFromStockOptionsExercised | 1,900,000 us-gaap_ProceedsFromStockOptionsExercised | 1,500,000 us-gaap_ProceedsFromStockOptionsExercised |  |  |
Common Class A [Member] |  |  |  |  |  |
Note 10 - Shareholders' Equity (Details) [Line Items] |  |  |  |  |  |
Common Stock, Shares Authorized (in Shares) |  |  |  | 80,000,000 us-gaap_CommonStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember |  |
Common Stock, Par or Stated Value Per Share (in Dollars per share) |  |  |  | $ 0.10 us-gaap_CommonStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember |  |
Common Class B [Member] |  |  |  |  |  |
Note 10 - Shareholders' Equity (Details) [Line Items] |  |  |  |  |  |
Common Stock, Shares Authorized (in Shares) |  |  |  | 40,000,000 us-gaap_CommonStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember |  |
Common Stock, Par or Stated Value Per Share (in Dollars per share) |  |  |  | $ 0.10 us-gaap_CommonStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember |  |
undefined |  |  |  | 10.00%tile_MaximumPercentageOfIssuedSharesToOutstandingShares / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember |  |
Common Stock, Shares, Issued (in Shares) |  |  |  | 6,459,556 us-gaap_CommonStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember |  |
Common Stock [Member] |  |  |  |  |  |
Note 10 - Shareholders' Equity (Details) [Line Items] |  |  |  |  |  |
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in Shares) |  |  |  |  |  | 500,000 us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Treasury Stock, Shares, Retired (in Shares) | 500,000 us-gaap_TreasuryStockSharesRetired / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |
Treasury Stock, Shares, Acquired (in Shares) | 500,000 us-gaap_TreasuryStockSharesAcquired / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |
Treasury Stock Acquired, Average Cost Per Share (in Dollars per share) | $ 15.30 us-gaap_TreasuryStockAcquiredAverageCostPerShare / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |
Employee Stock Option [Member] | Minimum [Member] |  |  |  |  |  |
Note 10 - Shareholders' Equity (Details) [Line Items] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 1 year |  |  |  |  |
Share-based Compensation Arrangement by Share Based Payment Award Award, Exercisable Period | 3 years |  |  |  |  |
Employee Stock Option [Member] | Maximum [Member] |  |  |  |  |  |
Note 10 - Shareholders' Equity (Details) [Line Items] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 5 years |  |  |  |  |
Share-based Compensation Arrangement by Share Based Payment Award Award, Exercisable Period | 10 years |  |  |  |  |
Employee Stock Option [Member] |  |  |  |  |  |
Note 10 - Shareholders' Equity (Details) [Line Items] |  |  |  |  |  |
Allocated Share-based Compensation Expense | 0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember | 100,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember | 500,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |  |  |
Restricted Stock [Member] | Minimum [Member] |  |  |  |  |  |
Note 10 - Shareholders' Equity (Details) [Line Items] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 2 years |  |  |  |  |
Restricted Stock [Member] | Maximum [Member] |  |  |  |  |  |
Note 10 - Shareholders' Equity (Details) [Line Items] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 5 years |  |  |  |  |
Restricted Stock [Member] |  |  |  |  |  |
Note 10 - Shareholders' Equity (Details) [Line Items] |  |  |  |  |  |
Allocated Share-based Compensation Expense | 4,000,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember | 7,900,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember | 3,300,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares) | 489,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember | 670,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember | 573,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options | 9,300,000 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember |  |  |  |  |
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options | $ 1,000,000 us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember | $ 3,000,000 us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember | $ 700,000 us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember |  |  |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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