XML 40 R28.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Acquisitions Pro Forma Narrative (Details) - Houston Interests, LLC [Member] - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2016
Business Acquisition [Line Items] |  |
Pro forma acquisition costs | $ 0.4 | $ 0.8
Pro forma interest expense | 0.3 | 0.7
Pro forma depreciation and amortization expense | 0.2 | 0.3
Pro forma income tax expense | $ 1.9 | $ 3.3

X
- Definition One time acquisition and integration costs that would not have been incurred without the consummation of a business combination. + References No definition available. + Details
Name: | mtrx_Proformaacquisitioncosts
Namespace Prefix: | mtrx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Pro forma depreciation and amortization expense + References No definition available. + Details
Name: | mtrx_Proformadepreciationandamortizationexpense
Namespace Prefix: | mtrx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Pro forma income tax expense + References No definition available. + Details
Name: | mtrx_Proformaincometaxexpense
Namespace Prefix: | mtrx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Pro forma interest expense + References No definition available. + Details
Name: | mtrx_Proformainterestexpense
Namespace Prefix: | mtrx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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
Name: | us-gaap_BusinessAcquisitionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=mtrx_HoustonInterestsLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |