Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Revenues	$ 309,422	$ 314,155	$ 952,282	$ 978,718
Cost of revenues	282,119	311,523	860,390	931,752
Gross profit	27,303	2,632	91,892	46,966
Selling, general and administrative expenses	20,956	17,080	65,509	56,538
Operating income (loss)	6,347	(14,448)	26,383	(9,572)
Other income (expense):
Interest expense	(241)	(294)	(756)	(946)
Interest income	56	40	147	390
Other	(109)	252	(311)	281
Income (loss) before income tax expense	6,053	(14,450)	25,463	(9,847)
Provision for federal, state and foreign income taxes	2,507	(1,508)	9,060	3,271
Net income (loss)	3,546	(12,942)	16,403	(13,118)
Less: Net loss attributable to noncontrolling interest	(811)	(9,983)	(3,326)	(19,359)
Net income (loss) attributable to Matrix Service Company	$ 4,357	$ (2,959)	$ 19,729	$ 6,241
Basic earnings (loss) per common share (US$ per share)	$ 0.16	$ (0.11)	$ 0.74	$ 0.23
Diluted earnings (loss) per common share (US$ per share)	$ 0.16	$ (0.11)	$ 0.73	$ 0.23
Weighted average common shares outstanding:
Basic (shares)	26,758	26,711	26,651	26,593
Diluted (shares)	27,054	26,711	27,191	27,175