Segment EBITDA is segment earnings before interest, taxes, depreciation and amortization.

No definition available.

Name:	tbi_SegmentEBITDA
Namespace Prefix:	tbi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

+ Details

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Balance Type:	debit
Period Type:	duration

- Definition

Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments.

+ 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)(1)(i))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

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- Definition

The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).

+ References

+ Details

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Period Type:	duration

- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

Aggregate revenue during the period from services rendered in the normal course of business, after deducting allowances and discounts.

+ References

+ Details

Name:	us-gaap_SalesRevenueServicesNet
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Data Type:	xbrli:monetaryItemType
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.4)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 330
-SubTopic 10
-Section 30
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=68048583&loc=d3e3636-108311

+ Details

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

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ProductOrServiceAxis=tbi_PeopleReadyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ProductOrServiceAxis=tbi_PeopleManagementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ProductOrServiceAxis=tbi_PeopleScoutMember
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Period Type:

SEGMENT INFORMATION (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
SEGMENT INFORMATION (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Oct. 01, 2017	Jul. 02, 2017	Apr. 02, 2017	Jan. 01, 2017	Sep. 23, 2016	Jun. 24, 2016	Mar. 25, 2016	Dec. 31, 2017	Jan. 01, 2017	Dec. 25, 2015
Segment Reporting Information [Line Items]
Revenue	$ 669,625	$ 660,780	$ 610,122	$ 568,244	$ 734,951	$ 697,097	$ 672,612	$ 645,980	$ 2,508,771	$ 2,750,640	$ 2,695,680
Segment EBITDA									144,647	59,934	169,735
Selling, general and administrative expense	(132,644)	(131,552)	(124,754)	(121,844)	(145,387)	(134,679)	(135,787)	(130,624)	(510,794)	(546,477)	(495,988)
Depreciation and amortization	(11,465)	(11,189)	(12,287)	(11,174)	(12,019)	(11,690)	(11,694)	(11,289)	(46,115)	(46,692)	(41,843)
Income (loss) from operations	23,636	29,278	18,239	6,411	23,481	27,751	(76,826)	8,599	77,564	(16,995)	97,842
Interest and other income (expense), net	(24)	(219)	155	74	(572)	(867)	(887)	(1,019)	(14)	(3,345)	(1,395)
Income before tax expense	$ 23,612	$ 29,059	$ 18,394	$ 6,485	$ 22,909	$ 26,884	$ (77,713)	$ 7,580	77,550	(20,340)	96,447
Corporate Segment
Segment Reporting Information [Line Items]
Selling, general and administrative expense									(20,968)	(30,237)	(30,050)
PeopleReady
Segment Reporting Information [Line Items]
Revenue									1,511,360	1,629,455	1,625,817
Segment EBITDA									78,372	101,270	123,899
PeopleManagement
Segment Reporting Information [Line Items]
Revenue									807,273	940,453	965,331
Segment EBITDA									27,043	(60,452)	36,512
PeopleScout
Segment Reporting Information [Line Items]
Revenue									190,138	180,732	104,532
Segment EBITDA									$ 39,232	$ 19,116	$ 9,324