Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Dec. 27, 2020	Dec. 27, 2020
Income Tax Disclosure [Abstract]
Discrete tax benefit	$ 359	$ 5,148
Change in valuation allowance income tax expense	$ 26	$ 2,153

Global intangible low tax income measurement period adjustment income tax expense benefit.

No definition available.

Name:	ufi_GlobalIntangibleLowTaxIncomeMeasurementPeriodAdjustmentIncomeTaxExpenseBenefit
Namespace Prefix:	ufi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration