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INCOME TAXES - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Income Tax Disclosure [Abstract]
Effective income tax rate, percent	10.00%	13.10%	28.50%
Income tax expense based on statutory rate	21.00%	21.00%	35.00%
Tax benefits	$ 1,400
Unrecognized tax benefits	2,078	$ 2,190	$ 2,210	$ 2,242
Unrecognized tax benefits that would impact effective tax rate	1,600
Unrecognized tax benefits, income tax penalties accrued	200
Unrecognized tax benefits, interest on income taxes accrued	$ 1,000

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Federal and state hiring tax benefits, such as Work Opportunity Tax Credit (WOTC) and California Enterprise Zone Tax Credits

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of unrecognized tax benefits.

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Amount of statutory penalties accrued for a tax position claimed or expected to be claimed by the entity, in its tax return.

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Amount of interest expense accrued for an underpayment of income taxes.

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