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FAIR VALUE MEASUREMENT (Details) (USD $) In Thousands, unless otherwise specified | Mar. 27, 2015 | Dec. 26, 2014
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Fair Value Measurement [Line Items] |  |  |  |
Restricted investments classified as held-to-maturity | $ 86,945 us-gaap_HeldToMaturitySecuritiesFairValue |  | $ 91,066 us-gaap_HeldToMaturitySecuritiesFairValue |
Certificate of deposits |  |  |  |
Fair Value Measurement [Line Items] |  |  |  |
Marketable securities classified as available-for-sale |  |  | 1,500 us-gaap_AvailableForSaleSecuritiesDebtSecurities / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_CertificatesOfDepositMember |
Carrying Value |  |  |  |
Fair Value Measurement [Line Items] |  |  |  |
Cash and cash equivalents | 17,779 us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember | [1] | 19,666 us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember | [1]
Carrying Value | Restricted Assets |  |  |  |
Fair Value Measurement [Line Items] |  |  |  |
Restricted cash and cash equivalents | 75,427 us-gaap_RestrictedCashAndCashEquivalents / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / tbi_RestrictedOrUnrestrictedStatusOfAssetsAxis = tbi_RestrictedAssetsMember | [1] | 68,359 us-gaap_RestrictedCashAndCashEquivalents / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / tbi_RestrictedOrUnrestrictedStatusOfAssetsAxis = tbi_RestrictedAssetsMember | [1]
Other restricted assets | 11,261 tbi_OtherRestrictedInvestmentsFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / tbi_RestrictedOrUnrestrictedStatusOfAssetsAxis = tbi_RestrictedAssetsMember | [2] | 9,972 tbi_OtherRestrictedInvestmentsFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / tbi_RestrictedOrUnrestrictedStatusOfAssetsAxis = tbi_RestrictedAssetsMember | [2]
Restricted investments classified as held-to-maturity | 85,351 us-gaap_HeldToMaturitySecuritiesFairValue / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / tbi_RestrictedOrUnrestrictedStatusOfAssetsAxis = tbi_RestrictedAssetsMember |  | 90,095 us-gaap_HeldToMaturitySecuritiesFairValue / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / tbi_RestrictedOrUnrestrictedStatusOfAssetsAxis = tbi_RestrictedAssetsMember |
Total Fair Value |  |  |  |
Fair Value Measurement [Line Items] |  |  |  |
Cash and cash equivalents | 17,779 us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember | [1] | 19,666 us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember | [1]
Total Fair Value | Certificate of deposits |  |  |  |
Fair Value Measurement [Line Items] |  |  |  |
Marketable securities classified as available-for-sale |  |  | 1,500 us-gaap_AvailableForSaleSecuritiesDebtSecurities / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_CertificatesOfDepositMember | [3]
Total Fair Value | Restricted Assets |  |  |  |
Fair Value Measurement [Line Items] |  |  |  |
Restricted cash and cash equivalents | 75,427 us-gaap_RestrictedCashAndCashEquivalents / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / tbi_RestrictedOrUnrestrictedStatusOfAssetsAxis = tbi_RestrictedAssetsMember | [1] | 68,359 us-gaap_RestrictedCashAndCashEquivalents / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / tbi_RestrictedOrUnrestrictedStatusOfAssetsAxis = tbi_RestrictedAssetsMember | [1]
Other restricted assets | 11,261 tbi_OtherRestrictedInvestmentsFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / tbi_RestrictedOrUnrestrictedStatusOfAssetsAxis = tbi_RestrictedAssetsMember | [2] | 9,972 tbi_OtherRestrictedInvestmentsFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / tbi_RestrictedOrUnrestrictedStatusOfAssetsAxis = tbi_RestrictedAssetsMember | [2]
Restricted investments classified as held-to-maturity | 86,945 us-gaap_HeldToMaturitySecuritiesFairValue / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / tbi_RestrictedOrUnrestrictedStatusOfAssetsAxis = tbi_RestrictedAssetsMember |  | 91,066 us-gaap_HeldToMaturitySecuritiesFairValue / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / tbi_RestrictedOrUnrestrictedStatusOfAssetsAxis = tbi_RestrictedAssetsMember |
Level 1 |  |  |  |
Fair Value Measurement [Line Items] |  |  |  |
Cash and cash equivalents | 17,779 us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | [1] | 19,666 us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | [1]
Marketable securities classified as available-for-sale |  |  | 0 us-gaap_AvailableForSaleSecuritiesDebtSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | [3]
Level 1 | Restricted Assets |  |  |  |
Fair Value Measurement [Line Items] |  |  |  |
Restricted cash and cash equivalents | 75,427 us-gaap_RestrictedCashAndCashEquivalents / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / tbi_RestrictedOrUnrestrictedStatusOfAssetsAxis = tbi_RestrictedAssetsMember | [1] | 68,359 us-gaap_RestrictedCashAndCashEquivalents / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / tbi_RestrictedOrUnrestrictedStatusOfAssetsAxis = tbi_RestrictedAssetsMember | [1]
Other restricted assets | 11,261 tbi_OtherRestrictedInvestmentsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / tbi_RestrictedOrUnrestrictedStatusOfAssetsAxis = tbi_RestrictedAssetsMember | [2] | 9,972 tbi_OtherRestrictedInvestmentsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / tbi_RestrictedOrUnrestrictedStatusOfAssetsAxis = tbi_RestrictedAssetsMember | [2]
Restricted investments classified as held-to-maturity | 0 us-gaap_HeldToMaturitySecuritiesFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / tbi_RestrictedOrUnrestrictedStatusOfAssetsAxis = tbi_RestrictedAssetsMember |  | 0 us-gaap_HeldToMaturitySecuritiesFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / tbi_RestrictedOrUnrestrictedStatusOfAssetsAxis = tbi_RestrictedAssetsMember |
Level 2 |  |  |  |
Fair Value Measurement [Line Items] |  |  |  |
Cash and cash equivalents | 0 us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member | [1] | 0 us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member | [1]
Level 2 | Restricted Assets |  |  |  |
Fair Value Measurement [Line Items] |  |  |  |
Restricted cash and cash equivalents | 0 us-gaap_RestrictedCashAndCashEquivalents / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / tbi_RestrictedOrUnrestrictedStatusOfAssetsAxis = tbi_RestrictedAssetsMember | [1] | 0 us-gaap_RestrictedCashAndCashEquivalents / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / tbi_RestrictedOrUnrestrictedStatusOfAssetsAxis = tbi_RestrictedAssetsMember | [1]
Other restricted assets | 0 tbi_OtherRestrictedInvestmentsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / tbi_RestrictedOrUnrestrictedStatusOfAssetsAxis = tbi_RestrictedAssetsMember | [2] | 0 tbi_OtherRestrictedInvestmentsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / tbi_RestrictedOrUnrestrictedStatusOfAssetsAxis = tbi_RestrictedAssetsMember | [2]
Restricted investments classified as held-to-maturity | 86,945 us-gaap_HeldToMaturitySecuritiesFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / tbi_RestrictedOrUnrestrictedStatusOfAssetsAxis = tbi_RestrictedAssetsMember |  | 91,066 us-gaap_HeldToMaturitySecuritiesFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / tbi_RestrictedOrUnrestrictedStatusOfAssetsAxis = tbi_RestrictedAssetsMember |
Level 3 |  |  |  |
Fair Value Measurement [Line Items] |  |  |  |
Cash and cash equivalents | 0 us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member | [1] | 0 us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member | [1]
Marketable securities classified as available-for-sale |  |  |  | [3]
Level 3 | Restricted Assets |  |  |  |
Fair Value Measurement [Line Items] |  |  |  |
Restricted cash and cash equivalents | 0 us-gaap_RestrictedCashAndCashEquivalents / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / tbi_RestrictedOrUnrestrictedStatusOfAssetsAxis = tbi_RestrictedAssetsMember | [1] | 0 us-gaap_RestrictedCashAndCashEquivalents / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / tbi_RestrictedOrUnrestrictedStatusOfAssetsAxis = tbi_RestrictedAssetsMember | [1]
Other restricted assets | 0 tbi_OtherRestrictedInvestmentsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / tbi_RestrictedOrUnrestrictedStatusOfAssetsAxis = tbi_RestrictedAssetsMember | [2] | 0 tbi_OtherRestrictedInvestmentsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / tbi_RestrictedOrUnrestrictedStatusOfAssetsAxis = tbi_RestrictedAssetsMember | [2]
Restricted investments classified as held-to-maturity | $ 0 us-gaap_HeldToMaturitySecuritiesFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / tbi_RestrictedOrUnrestrictedStatusOfAssetsAxis = tbi_RestrictedAssetsMember |  | $ 0 us-gaap_HeldToMaturitySecuritiesFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / tbi_RestrictedOrUnrestrictedStatusOfAssetsAxis = tbi_RestrictedAssetsMember |
[1] | Cash equivalents and restricted cash equivalents consist of money market funds, deposits, and investments with original maturities of three months or less.
[2] | Other restricted assets primarily consist of deferred compensation plan accounts, which are comprised of mutual funds.
[3] | At March 27, 2015 we held no marketable securities. At December 26, 2014, all our marketable securities, which consisted of CDs, had stated maturities of less than one year.

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- Definition Investments for deferred compensation agreements that are restricted to withdrawal or usage. + References No definition available. + Details
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 + Details
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