Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 30, 2016	Dec. 25, 2015	Dec. 30, 2016	Dec. 25, 2015
Earnings Per Share [Abstract]
Net income applicable to TRC Companies, Inc.	$ 3,998	$ 3,937	$ 7,637	$ 8,429
Basic weighted-average common shares outstanding (shares)	31,451	30,968	31,300	30,805
Effect of dilutive stock options, RSA's, RSU's and PSU's (in shares)	515	401	483	542
Diluted weighted-average common shares outstanding (in shares)	31,966	31,369	31,783	31,347
Earnings per common share applicable to TRC Companies, Inc.
Basic earnings per common share (in dollars per share)	$ 0.13	$ 0.13	$ 0.24	$ 0.27
Diluted earnings per common share (in dollars per share)	$ 0.13	$ 0.13	$ 0.24	$ 0.27
Anti-dilutive stock options, RSA's, RSU's and PSU's, excluded from the calculation (in dollars per share)	1,130	1,423	1,161	1,282