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Income Taxes - Additional Information (Details) $ in Thousands	3 Months Ended
	Sep. 27, 2020 USD ($)
Income Tax Disclosure [Abstract]
Discrete tax benefit	$ 4,789
Discrete tax expense	$ 2,127

X

- Definition

Change in valuation allowance income tax expense benefit.

+ References

No definition available.

+ Details

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

X

- Definition

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

+ References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

Name:	us-gaap_IncomeTaxDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration