Investments in Unconsolidated Affiliates and Variable Interest Entities - Schedule of Unaudited, Condensed Balance Sheet Information for Unconsolidated Affiliates (Details) - USD ($) $ in Thousands	Dec. 24, 2017	Jun. 25, 2017
Schedule Of Equity Method Investments [Line Items]
Current assets	$ 274,288	$ 258,160
Noncurrent assets	172,227	184,457
Current liabilities	59,396	57,977
Noncurrent liabilities	2,933	3,263
Shareholders’ equity and capital accounts	384,186	381,377
UNIFI’s portion of undistributed earnings	42,843
Parkdale America LLC [Member]
Schedule Of Equity Method Investments [Line Items]
Current assets	265,491	247,820
Noncurrent assets	171,256	183,418
Current liabilities	56,134	54,389
Noncurrent liabilities	2,933	3,263
Shareholders’ equity and capital accounts	377,680	373,586
UNIFI’s portion of undistributed earnings	41,432
UNF and UNF America [Member]
Schedule Of Equity Method Investments [Line Items]
Current assets	8,797	10,340
Noncurrent assets	971	1,039
Current liabilities	3,262	3,588
Shareholders’ equity and capital accounts	6,506	$ 7,791
UNIFI’s portion of undistributed earnings	$ 1,411