Investments in Unconsolidated Affiliates and Variable Interest Entities - Schedule of Unaudited, Condensed Balance Sheet Information for Unconsolidated Affiliates (Details) - USD ($) $ in Thousands	Mar. 25, 2018	Jun. 25, 2017
Schedule Of Equity Method Investments [Line Items]
Current assets	$ 277,742	$ 258,160
Noncurrent assets	166,863	184,457
Current liabilities	58,716	57,977
Noncurrent liabilities	3,683	3,263
Shareholders’ equity and capital accounts	382,206	381,377
UNIFI’s portion of undistributed earnings	41,266	48,164
Parkdale America LLC [Member]
Schedule Of Equity Method Investments [Line Items]
Current assets	267,775	247,820
Noncurrent assets	165,940	183,418
Current liabilities	54,943	54,389
Noncurrent liabilities	3,683	3,263
Shareholders’ equity and capital accounts	375,089	373,586
UNIFI’s portion of undistributed earnings	40,113	46,248
UNF and UNF America [Member]
Schedule Of Equity Method Investments [Line Items]
Current assets	9,967	10,340
Noncurrent assets	923	1,039
Current liabilities	3,773	3,588
Shareholders’ equity and capital accounts	7,117	7,791
UNIFI’s portion of undistributed earnings	$ 1,153	$ 1,916