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: