Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 25, 2015	Dec. 26, 2014	Dec. 25, 2015	Dec. 26, 2014
Earnings Per Share [Abstract]
Net income applicable to TRC Companies, Inc.	$ 3,937	$ 4,002	$ 8,429	$ 7,487
Basic (shares)	30,968	30,329	30,805	30,157
Effect of dilutive stock options, RSA's, RSU's and PSU's (in shares)	401	202	542	301
Diluted weighted-average common shares outstanding (in shares)	31,369	30,531	31,347	30,458
Basic earnings per common share (in dollars per share)	$ 0.13	$ 0.13	$ 0.27	$ 0.25
Diluted earnings per common share (in dollars per share)	$ 0.13	$ 0.13	$ 0.27	$ 0.25
Anti-dilutive stock options, RSA's, RSU's and PSU's, excluded from the calculation (in dollars per share)	1,423	2,098	1,282	2,000