Investments in Unconsolidated Affiliates and Variable Interest Entities - Schedule of Unaudited, Condensed Balance Sheet Information for Unconsolidated Affiliates (Details) - USD ($) $ in Thousands	Sep. 29, 2019	Jun. 30, 2019
Schedule Of Equity Method Investments [Line Items]
Current assets	$ 275,115	$ 306,828
Noncurrent assets	160,461	159,000
Current liabilities	79,271	74,944
Noncurrent liabilities	3,201	3,252
Shareholders’ equity and capital accounts	353,104	387,632
UNIFI’s portion of undistributed earnings	32,727	44,164
Parkdale America LLC [Member]
Schedule Of Equity Method Investments [Line Items]
Current assets	268,804	299,610
Noncurrent assets	159,813	158,304
Current liabilities	76,280	70,875
Noncurrent liabilities	3,201	3,252
Shareholders’ equity and capital accounts	349,136	383,787
UNIFI’s portion of undistributed earnings	31,732	43,343
UNF and UNF America [Member]
Schedule Of Equity Method Investments [Line Items]
Current assets	6,311	7,218
Noncurrent assets	648	696
Current liabilities	2,991	4,069
Shareholders’ equity and capital accounts	3,968	3,845
UNIFI’s portion of undistributed earnings	$ 995	$ 821