XML 24 R12.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Uncompleted Contracts (Notes) | 6 Months Ended
--- | ---
Dec. 31, 2017
Disclosure Customer Contracts Additional Information [Abstract] |
Uncompleted Contracts | Uncompleted Contracts Contract terms of the Company’s construction contracts generally provide for progress billings based on project milestones. The excess of costs incurred and estimated earnings over amounts billed on uncompleted contracts is reported as a current asset. The excess of amounts billed over costs incurred and estimated earnings recognized on uncompleted contracts is reported as a current liability. Gross and net amounts on uncompleted contracts are as follows:
| December 31, 2017 |  | June 30, 2017
| (in thousands)
Costs incurred and estimated earnings recognized on uncompleted contracts | $ | 2,152,981 |  |  | $ | 1,919,054 |
Billings on uncompleted contracts | 2,155,136 |  |  | 1,903,001 |
| $ | (2,155 | ) |  | $ | 16,053 |
Shown in balance sheet as: |  |  |
Costs and estimated earnings in excess of billings on uncompleted contracts | $ | 64,221 |  |  | $ | 91,180 |
Billings on uncompleted contracts in excess of costs and estimated earnings | 66,376 |  |  | 75,127 |
| $ | (2,155 | ) |  | $ | 16,053 |
Progress billings in accounts receivable at December 31, 2017 and June 30, 2017 included retentions to be collected within one year of $32.2 million and $54.3 million, respectively. Contract retentions collectible beyond one year are included in other assets in the condensed consolidated balance sheet and totaled $1.9 million as of June 30, 2017. There were no retentions collectible beyond one year as of December 31, 2017.

X
- Definition Disclosure - Customer Contracts - Additional Information [Abstract] + References No definition available. + Details
Name: | mtrx_DisclosureCustomerContractsAdditionalInformationAbstract
Namespace Prefix: | mtrx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for long-term contracts or programs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 912 -SubTopic 275 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=68065670&loc=d3e54651-109401 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6(d)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3(c)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 912 -SubTopic 405 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=68055288&loc=d3e56414-109416 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 35 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=68076031&loc=d3e58033-111643 + Details
Name: | us-gaap_LongTermContractsOrProgramsDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration