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Debt - Additional Information (Detail) $ in Thousands | 9 Months Ended |
--- | --- | ---
Mar. 31, 2016 USD ($) | Mar. 31, 2015 USD ($) | Jun. 30, 2015 USD ($)
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Document Period End Date | Mar. 31, 2016 |  |
Credit Agreement Term | 5 years |  |
Senior secured revolving credit facility | $ 200,000 |  | $ 200,000
mtrx_LineOfCreditFacilityExpirationDate | Mar. 13, 2019 |  |
Senior Leverage Ratio, Maximum | 2.50 |  |
Senior Leverage Ratio, Minimum | 1.00 |  |
Fixed Charge Coverage Ratio, Maximum | 1.25 |  |
Fixed Charge Coverage Ratio, Minimum | 1.00 |  |
Amount of Limit on Asset Dispositions | $ 20,000 |  |
Additional Margin on alternate base rate loans, Minimum | 0.25% |  |
Additional Margin on alternate base rate loans, Maximum | 1.00% |  |
Additional Margin on LIBOR loans, Minimum | 1.25% |  |
Additional Margin on LIBOR loans, Maximum | 2.00% |  |
Sublimit on Canadian dollar borrowings | $ 40,000 |  |
Additional Margin on CDOR loans, Minimum | 1.25% |  |
Additional Margin on CDOR loans, Maximum | 2.00% |  |
Additional Margin on Canadian prime rate loans, Minimum | 1.75% |  |
Additional Margin on Canadian prime rate loans, Maximum | 2.50% |  |
CDOR Rate description | sum of the annual rate of interest, which is the rate determined as being the arithmetic average of the quotations of all institutions listed in respect of the relevant CDOR interest period for Canadian Dollar denominated bankers’ acceptances, plus 0.1% |  |
Canadian prime rate description | greater of (i) the rate of interest per annum most recently announced or established by JPMorgan Chase Bank, N.A., Toronto Branch as its reference rate in effect on such day for determining interest rates for Canadian Dollar denominated commercial loans in Canada and (ii) the CDOR Rate plus 1.0%. |  |
Maximum limit of consolidated funded indebtedness | 2.5 |  |
Consolidated EBITDA as defined in the Credit Agreement | $ 76,400 |  |
Consolidated funded indebtedness | 16,800 |  |
Acquisition of long-term debt | $ 1,858 | $ 0 |
Minimum [Member] |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Unused Credit Facility Fee | 0.20% |  |
Maximum [Member] |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Unused Credit Facility Fee | 0.35% |  |
CDOR Rate [Member] |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Basis spread on variable rate basis | 0.10% |  |
Canadian Prime Rate [Member] |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Variable rate basis | CDOR |  |
Basis spread on variable rate basis | 1.00% |  |

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- Definition The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD. + References No definition available. + Details
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- Definition Consolidated earnings before interest taxes depreciation and amortization per credit. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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