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Business Segment Information - Product Sales Excluding All Other Category (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 26, 2017	Mar. 27, 2016	Mar. 26, 2017	Mar. 27, 2016
Segment Reporting Information [Line Items]
Total product sales	$ 159,599	$ 159,622	$ 471,964	$ 475,230
Polyester [Member]
Segment Reporting Information [Line Items]
Total product sales	132,612	130,089	388,180	373,292
Nylon [Member]
Segment Reporting Information [Line Items]
Total product sales	$ 26,987	$ 29,533	$ 83,784	$ 101,938

X

- Definition

Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(a))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=ufi_PolyesterMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=ufi_NylonMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: