Name:	tbi_CollateralCommitmentsCashCollateralHeldByInsuranceCarriers
Namespace Prefix:	tbi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Collateral Commitments, Letters of Credit

No definition available.

Name:	tbi_CollateralCommitmentsLettersofCredit
Namespace Prefix:	tbi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Maximum fee percentage on bond amount for surety bonds issued by independent insurance companies on our behalf.

No definition available.

Name:	tbi_CollateralCommitmentsSuretyBondAnnualFeeLimitPercentageOfBondAmount
Namespace Prefix:	tbi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

The total amount of surety bonds issued by independent insurance companies on our behalf as of the reporting date.

No definition available.

Name:	tbi_CollateralCommitmentsSuretyBonds
Namespace Prefix:	tbi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The minimum time requirement for notification of cancellation for a surety bond.

No definition available.

Name:	tbi_CollateralCommitmentsSuretyBondsRequiredCancellationNotice
Namespace Prefix:	tbi_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The period of time in which the terms of surety bonds are subject to review and renewal.

No definition available.

Name:	tbi_CollateralCommitmentsSuretyBondsReviewAndRenewalPeriodIfElected
Namespace Prefix:	tbi_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Total collateral commitments required by insurance carriers as of the reporting date for workers' compensation obligations for which the insurance carriers become responsible should we become insolvent.

No definition available.

Name:	tbi_CollateralCommitmentsTotalCollateralCommitments
Namespace Prefix:	tbi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Workers' Compensation Commitments [Line Items]

No definition available.

Name:	tbi_WorkersCompensationCommitmentsLineItems
Namespace Prefix:	tbi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The amount of cash, securities, or other assets held by a third-party trustee pursuant to the terms of an agreement which assets are available to be used by beneficiaries to that agreement only within the specific terms thereof and which agreement is expected to terminate within one year of the balance sheet date (or operating cycle, if longer) at which time the assets held-in-trust will be released or forfeited.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(b))
-URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

Name:	us-gaap_AssetsHeldInTrustCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The amount of cash, securities, or other assets held by a third-party trustee pursuant to the terms of an agreement which assets are available to be used by beneficiaries to that agreement only within the specific terms thereof and which agreement is expected to terminate more than one year from the balance sheet date (or operating cycle, if longer) at which time the assets held-in-trust will be released or forfeited.