Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Sep. 30, 2016	Sep. 25, 2015
Earnings Per Share [Abstract]
Net income applicable to TRC Companies, Inc.	$ 3,639	$ 4,492
Basic (shares)	31,149	30,635
Effect of dilutive stock options, RSA's, RSU's and PSU's (in shares)	452	683
Diluted weighted-average common shares outstanding (in shares)	31,601	31,318
Basic earnings per common share (in dollars per share)	$ 0.12	$ 0.15
Diluted earnings per common share (in dollars per share)	$ 0.12	$ 0.14
Anti-dilutive stock options, RSA's, RSU's and PSU's, excluded from the calculation (in dollars per share)	1,611	821