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Acquisitions (Pro Forma Information) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended
--- | ---
Sep. 30, 2014 | Sep. 30, 2013
Kvaerner NAC |  |
Business Acquisition [Line Items] |  |
Revenues | $ 321,683 | $ 275,666
Net income attributable to Matrix Service Company | 5,914 | 7,366
Basic earnings per common share | $ 0.22 | $ 0.28
Diluted earnings per common share | $ 0.22 | $ 0.28
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 |  | $ 300

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