XML 41 R29.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Intangible Assets Including Goodwill - Carrying Value of Goodwill By Segment (Details) $ in Thousands | 6 Months Ended
--- | ---
Dec. 31, 2018 USD ($)
Goodwill [Line Items] |
Goodwill | $ 96,162
Goodwill [Roll Forward] |
Net balance at June 30, 2015 | 96,162
Goodwill, Written off Related to Sale of Business Unit | (2,775)
Translation adjustment | (124)
Net balance at December 31, 2018 | 93,263
Electrical Infrastructure [Member] |
Goodwill [Line Items] |
Goodwill | 24,826
Goodwill [Roll Forward] |
Net balance at June 30, 2015 | 24,826
Goodwill, Written off Related to Sale of Business Unit | 0
Translation adjustment | (43)
Net balance at December 31, 2018 | 24,783
Oil Gas & Chemical [Member] |
Goodwill [Line Items] |
Goodwill | 33,604
Goodwill [Roll Forward] |
Net balance at June 30, 2015 | 33,604
Goodwill, Written off Related to Sale of Business Unit | (2,775)
Translation adjustment | 0
Net balance at December 31, 2018 | 30,829
Storage Solutions [Member] |
Goodwill [Line Items] |
Goodwill | 16,760
Goodwill [Roll Forward] |
Net balance at June 30, 2015 | 16,760
Goodwill, Written off Related to Sale of Business Unit | 0
Translation adjustment | (73)
Net balance at December 31, 2018 | 16,687
Industrial [Member] |
Goodwill [Line Items] |
Goodwill | 20,972
Goodwill [Roll Forward] |
Net balance at June 30, 2015 | 20,972
Goodwill, Written off Related to Sale of Business Unit | 0
Translation adjustment | (8)
Net balance at December 31, 2018 | $ 20,964

X
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
Name: | us-gaap_Goodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
Name: | us-gaap_GoodwillForeignCurrencyTranslationGainLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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_GoodwillLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_GoodwillRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
Name: | us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mtrx_ElectricalInfrastructureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mtrx_OilGasAndChemicalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mtrx_StorageSolutionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mtrx_IndustrialMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |