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Inventories - Additional Information (Details) - USD ($) $ in Thousands | Jun. 28, 2020 | Jun. 30, 2019
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Inventory Disclosure [Abstract] |  |
Foreign inventory valued at average cost | $ 42,451 | $ 45,122

X
- Definition Net amount of foreign subsidiary inventories valued under the average cost method and limited categories of supplies. + References No definition available. + Details
Name: | ufi_ForeignInventoryValuedAtAverageCost
Namespace Prefix: | ufi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_InventoryDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration