Investments in Unconsolidated Affiliates and Variable Interest Entities - Schedule of Unaudited, Condensed Balance Sheet Information for Unconsolidated Affiliates (Details) - USD ($) $ in Thousands	Dec. 29, 2019	Jun. 30, 2019
Schedule Of Equity Method Investments [Line Items]
Current assets	$ 269,530	$ 306,828
Non-current assets	158,482	159,000
Current liabilities	72,525	74,944
Non-current liabilities	3,562	3,252
Shareholders’ equity and capital accounts	351,925	387,632
UNIFI’s portion of undistributed earnings	32,121	44,164
Parkdale America LLC [Member]
Schedule Of Equity Method Investments [Line Items]
Current assets	262,412	299,610
Non-current assets	157,876	158,304
Current liabilities	69,152	70,875
Non-current liabilities	3,562	3,252
Shareholders’ equity and capital accounts	347,574	383,787
UNIFI’s portion of undistributed earnings	30,894	43,343
UNF and UNF America [Member]
Schedule Of Equity Method Investments [Line Items]
Current assets	7,118	7,218
Non-current assets	606	696
Current liabilities	3,373	4,069
Shareholders’ equity and capital accounts	4,351	3,845
UNIFI’s portion of undistributed earnings	$ 1,227	$ 821