CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 30, 2016	Dec. 25, 2015	Dec. 30, 2016	Dec. 25, 2015
Income Statement [Abstract]
Gross revenue	$ 198,662	$ 157,743	$ 379,513	$ 293,202
Less subcontractor costs and other direct reimbursable charges	71,306	46,361	127,852	81,657
Net service revenue	127,356	111,382	251,661	211,545
Interest income from contractual arrangements	62	27	96	42
Insurance recoverables and other income	644	1,031	1,281	1,773
Operating costs and expenses:
Cost of services (exclusive of costs shown separately below)	105,613	93,676	209,289	176,660
General and administrative expenses	11,042	8,046	21,881	15,167
Acquisition and integration expenses	0	1,240	0	2,118
Depreciation	1,754	1,704	3,542	3,128
Amortization	2,617	1,076	5,333	1,916
Total operating costs and expenses	121,026	105,742	240,045	198,989
Operating income	7,036	6,698	12,993	14,371
Interest income	286	137	564	137
Interest expense	(841)	(461)	(1,686)	(489)
Income from operations before taxes	6,481	6,374	11,871	14,019
Income tax provision	(2,473)	(2,439)	(4,204)	(5,596)
Net income	4,008	3,935	7,667	8,423
Net (income) loss applicable to noncontrolling interest	(10)	2	(30)	6
Net income applicable to TRC Companies, Inc.	$ 3,998	$ 3,937	$ 7,637	$ 8,429
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
Weighted-average common shares outstanding:
Basic (shares)	31,451	30,968	31,300	30,805
Diluted (shares)	31,966	31,369	31,783	31,347