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FAIR VALUE MEASUREMENT NARRATIVE (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Fair Value Disclosures [Abstract]
Goodwill and intangible asset impairment	$ 0	$ 0	$ (103,544)
Goodwill and intangible assets			160,800
Goodwill and intangible assets, fair value			$ 57,329

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- Definition

Goodwill and Intangible Assets, Fair Value

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No definition available.

+ Details

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Period Type:	instant

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- Definition

Goodwill and Intangible Assets, Gross

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No definition available.

+ Details

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

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No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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Period Type:	duration

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- Definition

Total loss recognized during the period from the impairment of goodwill plus the loss recognized in the period resulting from the impairment of the carrying amount of intangible assets, other than goodwill.

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No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Period Type:	duration