Investments in Unconsolidated Affiliates and Variable Interest Entities - Schedule of Unaudited, Condensed Balance Sheet Information for Unconsolidated Affiliates (Details) - USD ($) $ in Thousands	Mar. 29, 2020	Jun. 30, 2019
Schedule Of Equity Method Investments [Line Items]
Current assets	$ 264,829	$ 306,828
Non-current assets	152,303	159,000
Current liabilities	57,386	74,944
Non-current liabilities	2,602	3,252
Shareholders’ equity and capital accounts	357,144	387,632
UNIFI’s portion of undistributed earnings	35,564	44,164
Parkdale America LLC [Member]
Schedule Of Equity Method Investments [Line Items]
Current assets	258,113	299,610
Non-current assets	151,720	158,304
Current liabilities	54,513	70,875
Non-current liabilities	2,602	3,252
Shareholders’ equity and capital accounts	352,718	383,787
UNIFI’s portion of undistributed earnings	34,230	43,343
UNF and UNF America [Member]
Schedule Of Equity Method Investments [Line Items]
Current assets	6,716	7,218
Non-current assets	583	696
Current liabilities	2,873	4,069
Shareholders’ equity and capital accounts	4,426	3,845
UNIFI’s portion of undistributed earnings	$ 1,334	$ 821