Earnings Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 27, 2013	Dec. 28, 2012	Dec. 27, 2013	Dec. 28, 2012
Earnings Per Share [Abstract]
Net income applicable to TRC Companies, Inc.	$ 3,096	$ 4,123	$ 5,583	$ 8,395
Basic weighted-average common shares outstanding (shares)	29,652	28,874	29,477	28,668
Effect of dilutive stock options, RSA's, RSU's and PSU's (in shares)	417	597	572	809
Diluted weighted-average common shares outstanding (in shares)	30,069	29,471	30,049	29,477
Basic earnings per common share (in dollars per share)	$ 0.10	$ 0.14	$ 0.19	$ 0.29
Diluted earnings per common share (in dollars per share)	$ 0.10	$ 0.14	$ 0.19	$ 0.28
Anti-dilutive stock options, RSA's, RSU's and PSU's, excluded from the calculation (in dollars per share)	2,227	2,236	2,071	2,024