Earnings per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Sep. 26, 2014	Sep. 27, 2013
Earnings Per Share [Abstract]
Net income applicable to TRC Companies, Inc.	$ 3,485	$ 2,487
Basic (shares)	29,979	29,298
Effect of dilutive stock options, RSA's, RSU's and PSU's (in shares)	399	729
Diluted weighted-average common shares outstanding (in shares)	30,378	30,027
Basic earnings per common share (in dollars per share)	$ 0.12	$ 0.08
Diluted earnings per common share (in dollars per share)	$ 0.11	$ 0.08
Anti-dilutive stock options, RSA's, RSU's and PSU's, excluded from the calculation (in dollars per share)	1,189	1,475