Investments in Unconsolidated Affiliates and Variable Interest Entities - Schedule of Unaudited, Condensed Balance Sheet Information for Unconsolidated Affiliates (Details) - USD ($) $ in Thousands	Dec. 30, 2018	Jun. 24, 2018
Schedule Of Equity Method Investments [Line Items]
Current assets	$ 307,674	$ 297,281
Noncurrent assets	157,248	163,117
Current liabilities	76,932	74,748
Noncurrent liabilities	3,153	3,389
Shareholders’ equity and capital accounts	384,837	382,261
UNIFI’s portion of undistributed earnings	43,401	42,316
Parkdale America LLC [Member]
Schedule Of Equity Method Investments [Line Items]
Current assets	298,674	289,683
Noncurrent assets	156,468	162,242
Current liabilities	72,544	71,026
Noncurrent liabilities	3,153	3,389
Shareholders’ equity and capital accounts	379,445	377,510
UNIFI’s portion of undistributed earnings	42,044	41,429
UNF and UNF America [Member]
Schedule Of Equity Method Investments [Line Items]
Current assets	9,000	7,598
Noncurrent assets	780	875
Current liabilities	4,388	3,722
Shareholders’ equity and capital accounts	5,392	4,751
UNIFI’s portion of undistributed earnings	$ 1,357	$ 887