Computation of Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended																12 Months Ended
	Jun. 25, 2017		Mar. 26, 2017		Dec. 25, 2016		Sep. 25, 2016		Jun. 26, 2016		Mar. 27, 2016		Dec. 27, 2015		Sep. 27, 2015		Jun. 25, 2017	Jun. 26, 2016	Jun. 28, 2015
Earnings Per Share [Abstract]
Net income attributable to Unifi, Inc.	$ 9,704	[1],[2],[3]	$ 9,177	[1],[2],[3]	$ 4,591	[1],[2],[3]	$ 9,403	[1],[2],[3]	$ 10,237	[4]	$ 9,689	[4]	$ 6,464	[4]	$ 8,025	[4]	$ 32,875	$ 34,415	$ 42,151
Weighted average common shares outstanding (in shares)																	18,136	17,857	18,207
Basic (in dollars per share)	$ 0.53	[5]	$ 0.50	[5]	$ 0.25	[5]	$ 0.52	[5]	$ 0.57	[5]	$ 0.54	[5]	$ 0.36	[5]	$ 0.45	[5]	$ 1.81	$ 1.93	$ 2.32
Net potential common share equivalents – stock options and RSUs (in shares)																	307	558	629
Adjusted weighted average common shares outstanding (in shares)																	18,443	18,415	18,836
Diluted (in dollars per share)	$ 0.52	[5]	$ 0.50	[5]	$ 0.25	[5]	$ 0.51	[5]	$ 0.56	[5]	$ 0.53	[5]	$ 0.35	[5]	$ 0.43	[5]	$ 1.78	$ 1.87	$ 2.24
Excluded from the calculation of common share equivalents:
Anti-dilutive common share equivalents (in shares)																	390	193	150

[1] Net income attributable to Unifi, Inc. for the first three quarters of fiscal 2017 includes comparatively lower earnings from equity affiliates.

[2] Net income attributable to Unifi, Inc. for the quarter ended December 25, 2016 includes the loss on sale of business of $1,662.

[3] Net income attributable to Unifi, Inc. for the quarters ended September 25, 2016, March 26, 2017 and June 25, 2017 includes a comparatively lower effective tax rate.

[4] Net income attributable to Unifi, Inc. for the quarters ended June 26, 2016, March 27, 2016 and December 27, 2015 includes the unfavorable impact of key employee transition costs of approximately $840, $260 and $400, respectively.

[5] Income per share is computed independently for each of the periods presented. The sum of the income per share amounts for the quarters may not equal the total for the year.