Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
Revenues	$ 323,529	$ 342,880	$ 642,860	$ 664,563
Cost of revenues	293,524	326,925	578,271	620,229
Gross profit	30,005	15,955	64,589	44,334
Selling, general and administrative expenses	25,070	19,626	44,553	39,458
Operating income (loss)	4,935	(3,671)	20,036	4,876
Other income (expense):
Interest expense	(252)	(300)	(515)	(652)
Interest income	60	308	91	350
Other	(148)	(28)	(202)	29
Income (loss) before income tax expense	4,595	(3,691)	19,410	4,603
Provision for federal, state and foreign income taxes	1,477	1,155	6,553	4,779
Net income (loss)	3,118	(4,846)	12,857	(176)
Less: Net loss attributable to noncontrolling interest	(2,313)	(8,132)	(2,515)	(9,376)
Net income attributable to Matrix Service Company	$ 5,431	$ 3,286	$ 15,372	$ 9,200
Basic earnings per common share (US$ per share)	$ 0.20	$ 0.12	$ 0.58	$ 0.35
Diluted earnings per common share (US$ per share)	$ 0.20	$ 0.12	$ 0.56	$ 0.34
Weighted average common shares outstanding:
Basic (shares)	26,721	26,600	26,598	26,535
Diluted (shares)	27,248	27,156	27,229	27,154