Acquisitions (Pro Forma Information) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Kvaerner NAC
Business Acquisition [Line Items]
Revenues	$ 268,711	$ 1,053,348	$ 807,288
Net income attributable to Matrix Service Company	7,911	31,230	17,192
Basic earnings per common share	$ 0.30	$ 1.19	$ 0.66
Diluted earnings per common share	$ 0.30	$ 1.16	$ 0.65
Adjustment for Amortization Expense [Member] \| Matrix NAC
Business Acquisition [Line Items]
Net income attributable to Matrix Service Company	1,000
Adjustment for Depreciation Expense [Member] \| Matrix NAC
Business Acquisition [Line Items]
Net income attributable to Matrix Service Company	600	1,200	1,700
Adjustment for One-time Tax Settlement [Member] \| Matrix NAC
Business Acquisition [Line Items]
Net income attributable to Matrix Service Company		600
Adjustment for Incremental Intangible Amortization Expense [Member] \| Matrix NAC
Business Acquisition [Line Items]
Net income attributable to Matrix Service Company		2,100	3,100
Acquisition-related Costs [Member] \| Matrix NAC
Business Acquisition [Line Items]
Net income attributable to Matrix Service Company		$ 2,000	$ 2,000

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The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

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The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

+ References

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