XML 50 R38.htm IDEA: XBRL DOCUMENT v3.8.0.1

Income Taxes Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended	9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Prior federal income tax rate				35.00%
Blended income tax rate				28.06%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent				21.00%
Restriction of deductibility of certain executive compensation				$ 1.0
Effective Income Tax Rate Reconciliation, Percent	14.20%	38.70%		38.10%	933.60%
Expected effective tax rate				32.00%
Deferred tax remeasurement	$ 0.2		$ 1.2	$ 1.0
Discrete item impact on effective tax rate	$ 0.7			$ 0.6

X

- Definition

Blended income tax rate of 28.06% used by the Company for the remainder of Fiscal 2018. The use of this blended rate is stipulated by the Internal Revenue Code in connection with the Tax Cuts and Jobs Act of December 2017, which reduced the federal income tax rate from 35% to 21%. Since the Company has a June 30 fiscal year end, it must use a blend of 21% and 35% for the rest of the current fiscal year.

+ References

No definition available.

+ Details

Name:	mtrx_Blendedincometaxrate
Namespace Prefix:	mtrx_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Deferred tax remeasurement due to the enactment of the Tax Cuts and Jobs Act of 2017. The Company's domestic net deferred tax liability balance was remeasured at a lower corporate tax rate, which reduced the net deferred tax liability balance. The downward remeasurement was recorded as a benefit to income tax expense.

+ References

No definition available.

+ Details

Name:	mtrx_Deferredtaxremeasurement
Namespace Prefix:	mtrx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Expected effective tax rate

+ References

No definition available.

+ Details

Name:	mtrx_Expectedeffectivetaxrate
Namespace Prefix:	mtrx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Prior federal income tax rate prior to the Tax Cuts and Jobs Act.

+ References

No definition available.

+ Details

Name:	mtrx_Priorfederalincometaxrate
Namespace Prefix:	mtrx_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Restriction of deductibility of certain executive compensation in excess of $1.0 million. Description of one of the major changes in connection with the Tax Cuts and Jobs Act of December 2017.

+ References

No definition available.

+ Details

Name:	mtrx_Restrictionofdeductibilityofcertainexecutivecompensation
Namespace Prefix:	mtrx_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32698-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h)(2))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32687-109319

+ Details

Name:	us-gaap_EffectiveIncomeTaxRateContinuingOperations
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the income tax rates.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32687-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 6.I)
-URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32698-109319

+ Details

Name:	us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_IncomeTaxDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32687-109319

+ Details

Name:	us-gaap_IncomeTaxReconciliationOtherAdjustments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration