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WORKERS' COMPENSATION INSURANCE AND RESERVES - Narrative (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 27, 2015	Mar. 28, 2014	Dec. 26, 2014
Workers' Compensation Deductible Limit [Line Items]
Workers' compensation claim deductible limit	$ 2.0tbi_WorkersCompensationClaimDeductibleLimit
Weighted average period - claim payments below deductible limit	4 years 6 months
Payments made against self-insured claims	16.8us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaid	13.7us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaid
Weighted average period - claim payments and receivables above deductible limit	14 years 8 months
Excess claims	41.3tbi_Discountedworkerscompensationreserveforexcessclaims		42.6tbi_Discountedworkerscompensationreserveforexcessclaims
Workers' compensation claim receivables net of valuation allowance	37.4tbi_WorkersCompensationClaimReceivablesNetOfValuationAllowance		38.7tbi_WorkersCompensationClaimReceivablesNetOfValuationAllowance
Workers' compensation expense	$ 21.5tbi_WorkersCompensationExpense	$ 15.9tbi_WorkersCompensationExpense
Below limit
Workers' Compensation Deductible Limit [Line Items]
Weighted average rate	1.60%us-gaap_WeightedAverageDiscountRatePercent / tbi_WorkersCompensationDeductibleLimitAxis = tbi_BelowLimitMember	1.70%us-gaap_WeightedAverageDiscountRatePercent / tbi_WorkersCompensationDeductibleLimitAxis = tbi_BelowLimitMember

X

- Definition

Discounted workers compensation reserve for excess claims.

+ References

No definition available.

+ Details

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Namespace Prefix:	tbi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Estimated weighted average period in which claim payments are made and reimbursements from insurance carries are received for workers' compensation claims that are above the established deductible limit as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	tbi_WeightedAveragePeriodClaimPaymentsAndReceivablesAboveDeductibleLimit
Namespace Prefix:	tbi_
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Balance Type:	na
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X

- Definition

Estimated weighted average period in which claim payments are made for workers' compensation claims that are below the established deductible limit as of the balance sheet date.

+ References

No definition available.

+ Details

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X

- Definition

Amount of risk retained by the entity for workers' compensation claims, on a per occurrence basis, before the insurance arrangement begins to provide coverage.

+ References

No definition available.

+ Details

Name:	tbi_WorkersCompensationClaimDeductibleLimit
Namespace Prefix:	tbi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Carrying value as of the balance sheet date of reimbursement receivables from insurance carries pertaining to claims incurred of a workers compensation nature that are above the established deductible limit, net of a valuation allowance for reimbursement receivables that are expected to be uncollectible.

+ References

No definition available.

+ Details

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Namespace Prefix:	tbi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Details

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- Definition

Workers' compensation expense recognized during the period for claims reserves net of changes in discount in non monopolistic jurisdictions; premiums in monopolistic jurisdictions; insurance premiums; changes in the valuation allowance related to receivables from insurance companies; and other miscellaneous expenses.

+ References

No definition available.

+ Details

Name:	tbi_WorkersCompensationExpense
Namespace Prefix:	tbi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Total amount of payments made during the reporting period to settle insured claims and pay costs incurred in the claims settlement process.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Financial Reporting Release (FRR)

-Number 403

-Paragraph 04

-Subparagraph b



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 40

-Section 50

-Paragraph 3

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6482485&loc=d3e14764-158437

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The average discount rate applied to insurance contracts to determine future policy benefits to be paid to or on behalf of policyholders.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 40

-Section 50

-Paragraph 5

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6482714&loc=d3e14881-158438

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