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Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Sep. 30, 2015	Oct. 31, 2015
Document Documentand Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2015
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q1
Trading Symbol	MTRX
Entity Registrant Name	MATRIX SERVICE CO
Entity Central Index Key	0000866273
Current Fiscal Year End Date	--06-30
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		26,538,320

Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Revenues	$ 319,331	$ 321,683
Cost of revenues	284,747	293,304
Gross profit	34,584	28,379
Selling, general and administrative expenses	19,483	19,832
Operating income	15,101	8,547
Other income (expense):
Interest expense	(263)	(351)
Interest income	31	42
Other	(54)	57
Income before income tax expense	14,815	8,295
Provision for federal, state and foreign income taxes	5,076	3,624
Net income	9,739	4,671
Less: Net loss attributable to noncontrolling interest	(202)	(1,243)
Net income attributable to Matrix Service Company	$ 9,941	$ 5,914
Basic earnings per common share (US$ per share)	$ 0.38	$ 0.22
Diluted earnings per common share (US$ per share)	$ 0.37	$ 0.22
Weighted average common shares outstanding:
Basic (shares)	26,476	26,470
Diluted (shares)	27,050	27,134

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 9,739	$ 4,671
Other comprehensive loss, net of tax:
Foreign currency translation adjustments	(2,449)	(1,770)
Comprehensive income	7,290	2,901
Less: Comprehensive loss attributable to noncontrolling interest	(202)	(1,243)
Comprehensive income attributable to Matrix Service Company	$ 7,492	$ 4,144

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2015	Jun. 30, 2015
Current assets:
Cash and cash equivalents	$ 69,180	$ 79,239
Accounts receivable, less allowances (September 30, 2015— $895 and June 30, 2015—$561)	182,634	199,149
Costs and estimated earnings in excess of billings on uncompleted contracts	83,604	86,071
Deferred income taxes	7,274	8,298
Inventories	2,863	2,773
Income taxes receivable	459	579
Other current assets	8,494	5,660
Total current assets	354,508	381,769
Property, plant and equipment at cost:
Land and buildings	32,609	32,746
Construction equipment	88,131	87,561
Transportation equipment	47,196	47,468
Office equipment and software	28,072	28,874
Construction in progress	8,095	5,196
Property, plant and equipment at cost, gross	204,103	201,845
Accumulated depreciation	(120,150)	(116,782)
Property, plant and equipment at cost, net	83,953	85,063
Goodwill	70,940	71,518
Other intangible assets	22,926	23,961
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent	2,118	2,073
Other assets	2,126	3,947
Total assets	536,571	568,331
Current liabilities:
Accounts payable	99,759	125,792
Billings on uncompleted contracts in excess of costs and estimated earnings	75,275	96,704
Accrued wages and benefits	22,719	26,725
Accrued insurance	8,736	8,100
Income taxes payable	4,494	3,268
Deferred Tax Liabilities, Net, Current	863	473
Other accrued expenses	5,686	6,498
Total current liabilities	217,532	267,560
Deferred income taxes - noncurrent	7,244	7,413
Borrowings under senior credit facility	9,766	8,804
Total liabilities	234,542	283,777
Commitments and contingencies
Matrix Service Company stockholders' equity:
Common stock—$.01 par value; 60,000,000 shares authorized; 27,888,217 shares issued as of September 30, 2015, and June 30, 2015; 26,531,657 and 26,440,823 shares outstanding as of September 30, 2015 and June 30, 2015	279	279
Additional paid-in capital	124,146	123,038
Retained earnings	204,335	194,394
Accumulated other comprehensive loss	(8,375)	(5,926)
Matrix Service Company stockholders' equity	320,385	311,785
Less: Treasury stock, at cost— 1,356,560 shares as of September 30, 2015, and 1,447,394 shares as of June 30, 2015	(17,845)	(18,489)
Total Matrix Service Company stockholders’ equity	302,540	293,296
Noncontrolling interest	(511)	(8,742)
Total stockholders' equity	302,029	284,554
Total liabilities and stockholders’ equity	$ 536,571	$ 568,331

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2015	Jun. 30, 2015
Statement Condensed Consolidated Balance Sheets [Abstract]
Accounts receivable, allowances	$ 895	$ 561
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	60,000,000	60,000,000
Common stock, shares issued	27,888,217	27,888,217
Treasury stock, shares	1,356,560	1,447,394

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Operating activities:
Net income	$ 9,739	$ 4,671
Adjustments to reconcile net income to net cash provided (used) by operating activities:
Depreciation and amortization	5,429	5,771
Deferred income tax	1,380	(1,994)
Gain on sale of property, plant and equipment	(74)	(122)
Provision for uncollectible accounts	334	465
Stock-based compensation expense	1,658	1,457
Excess Tax Benefit from Share-based Compensation, Operating Activities	(20)	(660)
Other	60	59
Changes in operating assets and liabilities increasing (decreasing) cash, net of effects from acquisitions:
Accounts receivable	16,181	30,379
Costs and estimated earnings in excess of billings on uncompleted contracts	2,467	(16,811)
Inventories	(90)	39
Other assets and liabilities	293	10,726
Accounts payable	(26,197)	(17,531)
Billings on uncompleted contracts in excess of costs and estimated earnings	(21,429)	(4,732)
Accrued expenses	(4,182)	(6,605)
Net cash provided (used) by operating activities	(14,451)	5,112
Investing activities:
Acquisition of property, plant and equipment	(3,941)	(3,656)
Acquisition, net of cash acquired	0	(5,250)
Proceeds from asset sales	135	148
Net cash used by investing activities	(3,806)	(8,758)
Financing activities:
Proceeds from Noncontrolling Interests	8,433	0
Issuances of common stock	384	193
Excess tax benefit of exercised stock options and vesting of deferred shares	20	660
Advances under credit agreement	962	5,817
Repayments of advances under credit agreement	0	(6,094)
Proceeds from issuance of common stock under employee stock purchase plan	72	58
Repurchase of common stock for payment of statutory taxes due on equity-based compensation	(382)	(913)
Net cash provided (used) by financing activities	9,489	(279)
Effect of exchange rate changes on cash	(1,291)	(436)
Net decrease in cash and cash equivalents	(10,059)	(4,361)
Cash and cash equivalents, beginning of period	79,239	77,115
Cash and cash equivalents, end of period	69,180	72,754
Supplemental disclosure of cash flow information:
Income taxes	1,747	(1,972)
Interest	311	524
Non-cash investing and financing activities:
Purchases of property, plant and equipment on account	$ 603	$ 370

Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Jun. 30, 2014	$ 282,283	$ 279	$ 119,777	$ 177,237	$ (16,595)	$ (182)	$ 1,767
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	4,671			5,914			(1,243)
Other comprehensive income (loss)	(1,770)					(1,770)
Exercise of stock options	193		(213)		406
Tax effect of exercised stock options and vesting of deferred shares	660		660
Issuance of deferred shares	0		(1,579)		1,579
Treasury shares sold to Employee Stock Purchase Plan	58		27		31
Other treasury share purchases	(913)				(913)
Stock-based compensation expense	1,457		1,457
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Sep. 30, 2014	286,639	279	120,129	183,151	(15,492)	(1,952)	524
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Jun. 30, 2015	284,554	279	123,038	194,394	(18,489)	(5,926)	(8,742)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	9,739			9,941			(202)
Noncontrolling Interest, Increase from Subsidiary Equity Issuance	8,433						8,433
Other comprehensive income (loss)	(2,449)					(2,449)
Exercise of stock options	384		(15)		399
Tax effect of exercised stock options and vesting of deferred shares	20		20
Issuance of deferred shares	0		(590)		590
Treasury shares sold to Employee Stock Purchase Plan	72		35		37
Other treasury share purchases	(382)				(382)
Stock-based compensation expense	1,658		1,658
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Sep. 30, 2015	$ 302,029	$ 279	$ 124,146	$ 204,335	$ (17,845)	$ (8,375)	$ (511)

Condensed Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - shares	3 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Exercise of stock options, shares	43,137	23,100
Employee Stock Purchase Plan, shares	3,993	1,790
Issuance of deferred shares, shares	63,809	89,738
Other treasury shares purchases, shares	20,105	33,304

Basis of Presentation (Notes)	3 Months Ended
Basis of Presentation (Notes)	Sep. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation and Accounting Policies The condensed consolidated financial statements include the accounts of Matrix Service Company (“Matrix”, “we”, “our”, “us”, “its” or the “Company”) and its subsidiaries, unless otherwise indicated. Intercompany balances and transactions have been eliminated in consolidation. The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with Rule 10-01 of Regulation S-X for interim financial statements required to be filed with the Securities and Exchange Commission and do not include all information and footnotes required by generally accepted accounting principles for complete financial statements. However, the information furnished reflects all adjustments, consisting of normal recurring adjustments and other adjustments described herein, that are, in the opinion of management, necessary for a fair statement of the results of operations, cash flows and financial position for the interim periods presented. The accompanying condensed financial statements should be read in conjunction with the audited financial statements for the year ended June 30, 2015, included in the Company’s Annual Report on Form 10-K for the year then ended. Recently Issued Accounting Standards Accounting Standards Update 2014-09 (Topic 606), Revenue from Contracts with Customers On May 28, 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-09. The standard outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. The core principle of the revenue model is that “an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services.” The ASU also requires entities to disclose both quantitative and qualitative information that enables users of financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. The ASU’s disclosure requirements are significantly more comprehensive than those in existing revenue standards. The ASU applies to all contracts with customers except those that are within the scope of other topics in the FASB Accounting Standards Codification ("ASC"). In July 2015, the FASB deferred the effective date of ASU 2014-09 by one year. With the deferral, this ASU is now effective for annual reporting periods beginning after December 15, 2017, with early adoption now permitted on a limited basis. Upon adoption, the Company may elect one of two application methods, a full retrospective application or a modified retrospective application. We expect to adopt this standard on July 1, 2018 and are currently evaluating its expected impact on our financial statements. Accounting Standards Update 2014-15 (Subtopic 205-40)—Presentation of Financial Statements—Going Concern : Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern On August 27, 2014, the FASB issued ASU 2014-15, which provides guidance on determining when and how reporting entities must disclose going-concern uncertainties in their financial statements. The new standard requires management to perform interim and annual assessments of an entity’s ability to continue as a going concern within one year of the date of issuance of the entity’s financial statements. Further, an entity must provide certain disclosures if there is “substantial doubt about the entity’s ability to continue as a going concern.” The FASB believes that requiring management to perform the assessment will enhance the timeliness, clarity, and consistency of related disclosures and improve convergence with international financial reporting standards ("IFRSs") (which emphasize management’s responsibility for performing the going-concern assessment). However, the time horizon for the assessment (look-forward period) and the disclosure thresholds under U.S. GAAP and IFRSs will continue to differ. The ASU is effective for annual periods ending after December 15, 2016, and interim periods thereafter; early adoption is permitted. We expect to adopt this standard in fiscal 2017. Accounting Standards Update 2015-15—Interest—Imputation of Interest (Subtopic 835-30): Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements—Amendments to SEC Paragraphs Pursuant to Staff Announcement at June 18, 2015 EITF Meeting (SEC Update) On August 16, 2015, the FASB issued ASU 2015-15 to clarify the Securities and Exchange Commission ("SEC") staff’s position on presenting and measuring debt issuance costs incurred in connection with line-of-credit arrangements given the lack of guidance on this topic in ASU 2015-03. The SEC has announced that it would “not object to an entity deferring and presenting debt issuance costs as an asset and subsequently amortizing the deferred debt issuance costs ratably over the term of the line-of-credit arrangement.” For public business entities, the amendments in this Update are effective for financial statements issued for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. We expect to adopt this standard in fiscal 2017. The adoption of this standard will have no impact on the Company's presentation of debt issuance costs. Accounting Standards Update 2015-16—Business Combinations (Topic 805)—Simplifying the Accounting for Measurement-Period Adjustments On September 25, 2015, the FASB issued ASU 2015-16 to simplify the accounting for measurement-period adjustments. The ASU was issued in response to stakeholder feedback that restatements of prior periods to reflect adjustments made to provisional amounts recognized in a business combination increase the cost and complexity of financial reporting but do not significantly improve the usefulness of the information. Under the ASU, an acquirer must recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. The ASU also requires acquirers to present separately on the face of the income statement, or disclose in the notes, the portion of the amount recorded in current-period earnings by line item that would have been recorded in previous reporting periods if the adjustment to the provisional amounts had been recognized as of the acquisition date. For public business entities, the ASU is effective for fiscal years beginning after December 15, 2015, including interim periods within those fiscal years. We expect to adopt this standard in fiscal 2017.

Acquisitions (Notes)

3 Months Ended

Sep. 30, 2015

Business Combinations [Abstract]

Acquisitions

Note 2 – Acquisition

Purchase of HDB Ltd. Limited Partnership

On August 22, 2014, the Company purchased substantially all of the assets of HDB Ltd. Limited Partnership ("HDB"). HDB, headquartered in Bakersfield, California provides construction, fabrication and turnaround services to energy companies throughout California’s central valley. The acquisition advances a strategic goal of the Company to expand into the upstream energy market. The acquisition purchase price was $5.3 million and was funded with cash on hand. Commencing on August 22, 2014, HDB's operating results are included in the Oil Gas & Chemical Segment.

The purchase price was allocated to the major categories of assets and liabilities based on their estimated fair value at the acquisition date. The following table summarizes the purchase price allocation (in thousands):



Current assets	$	1,658
Property, plant and equipment	1,162
Tax deductible goodwill	2,586
Other intangible assets	900
Total assets acquired	6,306
Current liabilities	1,056
Net assets acquired	$	5,250

All of the recorded goodwill from the HDB acquisition is tax deductible. The operating data related to this acquisition was not material.

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

+ References

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+ Details

Uncompleted Contracts (Notes)

3 Months Ended

Sep. 30, 2015

Disclosure Customer Contracts Additional Information [Abstract]

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:



	September 30, 2015		June 30, 2015
	(in thousands)
Costs incurred and estimated earnings recognized on uncompleted contracts	$	1,744,572	$	1,633,780
Billings on uncompleted contracts	1,736,243		1,644,413
	$	8,329	$	(10,633	)
Shown on balance sheet as:
Costs and estimated earnings in excess of billings on uncompleted contracts	$	83,604	$	86,071
Billings on uncompleted contracts in excess of costs and estimated earnings	75,275		96,704
	$	8,329	$	(10,633	)

Progress billings in accounts receivable at September 30, 2015 and June 30, 2015 included retentions to be collected within one year of $26.3 million and $25.2 million, respectively. Contract retentions collectible beyond one year are included in Other Assets on the Condensed Consolidated Balance Sheet and totaled $1.0 million at September 30, 2015 and $2.8 million at June 30, 2015.

Other

In the three months ended September 30, 2014 our results of operations were materially impacted by charges resulting from a change in estimate related to an acquired EPC joint venture project in the Electrical Infrastructure segment. The charges resulted in a reduction to operating income of $3.3 million and an after-tax reduction of $1.3 million to net income attributable to Matrix Service Company. The Company reached substantial completion in the fourth quarter of fiscal 2015 on the project and is currently working through project closeout.

Intangible Assets Including Goodwill (Notes)

3 Months Ended

Sep. 30, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets Including Goodwill

Goodwill

The changes in the carrying value of goodwill by segment are as follows:



	Electrical Infrastructure			Oil Gas & Chemical			Storage Solutions			Industrial			Total
	(In thousands)
Goodwill	$	60,027		$	17,008		$	10,586		$	8,897		$	96,518
Cumulative impairment loss (1)	(17,653		)	(3,000		)	(922		)	(3,425		)	(25,000		)
Net balance at June 30, 2015	42,374			14,008			9,664			5,472			71,518
Translation adjustment (2)	(376		)	—			(131		)	(71		)	(578		)
Net balance at September 30, 2015	$	41,998		$	14,008		$	9,533		$	5,401		$	70,940


(1)	A $25.0 million impairment charge was recorded in February 2005.


(2)	The translation adjustments relate to the periodic translation of Canadian Dollar denominated goodwill recorded as a part of prior Canadian acquisitions.

Other Intangible Assets

Information on the carrying value of other intangible assets is as follows:



		At September 30, 2015
	Useful Life	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
	(Years)	(In thousands)
Intellectual property	6 to 15	$	2,460	$	(1,127	)	$	1,333
Customer based	1.5 to 15	27,566		(7,631		)	19,935
Non-compete agreements	4 to 5	1,354		(874		)	480
Trade names	3 to 5	1,615		(437		)	1,178
Total amortizing intangible assets		$	32,995	$	(10,069	)	$	22,926



		At June 30, 2015
	Useful Life	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
	(Years)	(In thousands)
Intellectual property	6 to 15	$	2,460	$	(1,086	)	$	1,374
Customer based	1.5 to 15	27,837		(7,109		)	20,728
Non-compete agreements	4 to 5	1,354		(802		)	552
Trade name	3 to 5	1,615		(308		)	1,307
Total amortizing intangible assets		$	33,266	$	(9,305	)	$	23,961

Amortization expense totaled $0.8 million in the three months ended September 30, 2015 and $1.2 million in the three months ended September 30, 2014. We estimate that the remaining amortization expense at September 30, 2015 will be as follows (in thousands):



Period ending:
Remainder of Fiscal 2016	$	2,471
Fiscal 2017	3,216
Fiscal 2018	2,876
Fiscal 2019	2,509
Fiscal 2020	2,509
Fiscal 2021	2,506
Thereafter	6,839
Total estimated remaining amortization expense at September 30, 2015	$	22,926

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

+ References + Details

Debt (Notes)

3 Months Ended

Sep. 30, 2015

Debt Disclosure [Abstract]

Debt

The Company has a five-year $200.0 million senior secured revolving credit facility under a credit agreement (the "Credit Agreement") that expires March 13, 2019. Advances under the credit facility may be used for working capital, acquisitions, capital expenditures, issuances of letters of credit and other lawful purposes.

The Credit Agreement includes the following covenants and borrowing limitations:


•	Our Senior Leverage Ratio, as defined in the agreement, may not exceed 2.50 to 1.00, determined as of the end of each fiscal quarter.


•	We are required to maintain a Fixed Charge Coverage Ratio, as defined in the agreement, greater than or equal to 1.25 to 1.00, determined as of the end of each fiscal quarter.


•	Asset dispositions (other than inventory and obsolete or unneeded equipment disposed of in the ordinary course of business) are limited to $20.0 million per 12-month period.

Amounts borrowed under the Credit Agreement bear interest at LIBOR or an Alternate Base Rate, plus in each case, an additional margin based on the Senior Leverage Ratio. The additional margin on Alternate Base Rate and LIBOR-based loans ranges between 0.25% and 1.0% and between 1.25% and 2.0%, respectively.

The Credit Agreement also permits us to borrow in Canadian dollars with a sublimit of U.S. $40.0 million. Amounts borrowed in Canadian dollars will bear interest either at the CDOR Rate, plus an additional margin based on the Senior Leverage Ratio ranging from 1.25% to 2.0%, or at the Canadian Prime Rate, plus an additional margin based on the Senior Leverage Ratio ranging from 1.75% to 2.5%. The CDOR Rate is equal to the sum of the annual rate of interest, which is the rate determined as being the arithmetic average of the quotations of all institutions listed in respect of the relevant CDOR interest period for Canadian Dollar denominated bankers’ acceptances, plus 0.1%. The Canadian Prime Rate is equal to the greater of (i) the rate of interest per annum most recently announced or established by JPMorgan Chase Bank, N.A., Toronto Branch as its reference rate in effect on such day for determining interest rates for Canadian Dollar denominated commercial loans in Canada and (ii) the CDOR Rate plus 1.0%.

The Unused Credit Facility Fee is between 0.20% and 0.35% based on the Senior Leverage Ratio.

The Credit Agreement includes a Senior Leverage Ratio covenant, which provides that Consolidated Funded Indebtedness, as of the end of any fiscal quarter, may not exceed 2.5 times Consolidated EBITDA, as defined in the Credit Agreement, over the previous four quarters. For the four quarters ended September 30, 2015, Consolidated EBITDA, as defined in the Credit Agreement, was $63.3 million. Accordingly, at September 30, 2015, there was a restriction on our ability to access the full amount of the credit facility. Consolidated Funded Indebtedness at September 30, 2015 was $25.1 million.

Availability under the senior credit facility was as follows:



	September 30, 2015		June 30, 2015
	(In thousands)
Senior credit facility	$	200,000	$	200,000
Capacity constraint due to the Senior Leverage Ratio	41,723		54,968
Capacity under the credit facility	158,277		145,032
Borrowings outstanding	9,766		8,804
Letters of credit	23,342		40,587
Availability under the senior credit facility	$	125,169	$	95,641

Outstanding borrowings at September 30, 2015 under our Credit Agreement were used for Canadian dollar advances required for short term working capital, including cross-border purchases of materials and services.

At September 30, 2015, the Company is in compliance with all affirmative, negative, and financial covenants under the Credit Agreement.

Income Taxes (Notes)	3 Months Ended
Income Taxes (Notes)	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes We use the asset and liability approach for financial accounting and reporting for income taxes. Deferred income tax assets and liabilities are computed annually for differences between the financial statement and tax bases of assets and liabilities that will result in taxable or deductible amounts in the future based on enacted tax laws and rates applicable to the periods in which the differences are expected to affect taxable income. Valuation allowances based on our judgments and estimates are established when necessary to reduce deferred tax assets to the amount expected to be realized in future operating results. Company management believes that realization of deferred tax assets in excess of the valuation allowance is more likely than not. Our estimates are based on facts and circumstances in existence as well as interpretations of existing tax regulations and laws applied to the facts and circumstances. The Company provides for income taxes regardless of whether it has received a tax assessment. Taxes are provided when it is considered probable that additional taxes will be due in excess of amounts included in the tax return. The Company regularly reviews exposure to additional income taxes due, and as further information is known or events occur, adjustments may be recorded.

Commitments and Contingencies (Notes)	3 Months Ended
Commitments and Contingencies (Notes)	Sep. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Insurance Reserves The Company maintains insurance coverage for various aspects of its operations. However, exposure to potential losses is retained through the use of deductibles, self-insured retentions and coverage limits. Typically our contracts require us to indemnify our customers for injury, damage or loss arising from the performance of our services and provide warranties for materials and workmanship. The Company may also be required to name the customer as an additional insured up to the limits of insurance available, or we may be required to purchase special insurance policies or surety bonds for specific customers or provide letters of credit in lieu of bonds to satisfy performance and financial guarantees on some projects. Matrix maintains a performance and payment bonding line sufficient to support the business. The Company generally requires its subcontractors to indemnify the Company and the Company’s customer and name the Company as an additional insured for activities arising out of the subcontractors’ work. We also require certain subcontractors to provide additional insurance policies, including surety bonds in favor of the Company, to secure the subcontractors’ work or as required by the subcontract. There can be no assurance that our insurance and the additional insurance coverage provided by our subcontractors will fully protect us against a valid claim or loss under the contracts with our customers. Unapproved Change Orders and Claims Costs and estimated earnings in excess of billings on uncompleted contracts included revenues for unapproved change orders and claims of $13.1 million at September 30, 2015 and $12.7 million at June 30, 2015. Generally, collection of amounts related to unapproved change orders and claims is expected within twelve months. However, since customers may not pay these amounts until final resolution of related claims, collection of these amounts may extend beyond one year. Other The Company and its subsidiaries are participants in various legal actions. It is the opinion of management that none of the known legal actions will have a material impact on the Company’s financial position, results of operations or liquidity.

Earnings per Common Share (Notes)

3 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

Earnings per Common Share

Basic earnings per share (“Basic EPS”) is calculated based on the weighted average shares outstanding during the period. Diluted earnings per share (“Diluted EPS”) includes the dilutive effect of stock options and nonvested deferred shares.

The computation of basic and diluted earnings per share is as follows:



	Three Months Ended
	September 30, 2015		September 30, 2014
	(In thousands, except per share data)
Basic EPS:
Net income attributable to Matrix Service Company	$	9,941	$	5,914
Weighted average shares outstanding	26,476		26,470
Basic EPS	$	0.38	$	0.22
Diluted EPS:
Weighted average shares outstanding – basic	26,476		26,470
Dilutive stock options	86		147
Dilutive nonvested deferred shares	488		517
Diluted weighted average shares	27,050		27,134
Diluted EPS	$	0.37	$	0.22

The following securities are considered antidilutive and have been excluded from the calculation of Diluted EPS:



	Three Months Ended
	September 30, 2015	September 30, 2014
	(In thousands)
Nonvested deferred shares	56	63

Segment Information (Notes)

3 Months Ended

Sep. 30, 2015

Segment Reporting [Abstract]

Segment Information

We operate our business through four reportable segments: Electrical Infrastructure, Oil Gas & Chemical, Storage Solutions, and Industrial.

The Electrical Infrastructure segment primarily encompasses construction and maintenance services to a variety of power generation facilities, such as combined cycle plants, natural gas fired power stations, and renewable energy installations. We also provide high voltage services to investor owned utilities, including construction of new substations, upgrades of existing substations, short-run transmission line installations, distribution upgrades and maintenance, and storm restoration services.

The Oil Gas & Chemical segment includes our traditional turnaround activities, plant maintenance services and construction in the downstream petroleum industry. Another key offering is industrial cleaning services, which include hydroblasting, hydroexcavating, chemical cleaning and vacuum services. We also perform work in the petrochemical, natural gas, gas processing and compression, and upstream petroleum markets.

The Storage Solutions segment includes new construction of crude and refined products aboveground storage tanks (“ASTs”), as well as planned and emergency maintenance services. The Storage Solutions segment also includes balance of plant work in storage terminals and tank farms. Also included in the Storage Solutions segment is work related to specialty storage tanks, including liquefied natural gas (“LNG”), liquid nitrogen/liquid oxygen (“LIN/LOX”), liquid petroleum (“LPG”) tanks and other specialty vessels, including spheres. Finally, we offer AST products, including floating roof seals.

The Industrial segment includes construction and maintenance work in the iron and steel and mining and minerals industries, bulk material handling and fertilizer production facilities, as well as work for clients in other industrial markets.

The Company evaluates performance and allocates resources based on operating income. The accounting policies of the reportable segments are the same as those described in the Summary of Significant Accounting Policies footnote included in the Company’s Annual Report on Form 10-K for the year ended June 30, 2015. Intersegment sales and transfers are recorded at cost; therefore, no intercompany profit or loss is recognized.

Segment assets consist primarily of accounts receivable, costs and estimated earnings in excess of billings on uncompleted contracts, property, plant and equipment, goodwill and other intangible assets.

Results of Operations

(In thousands)



	Three Months Ended
	September 30, 2015		September 30, 2014
Gross revenues
Electrical Infrastructure	$	65,625	$	55,673
Oil Gas & Chemical	68,959		54,199
Storage Solutions	144,570		133,350
Industrial	41,335		79,360
Total gross revenues	$	320,489	$	322,582
Less: Inter-segment revenues
Electrical Infrastructure	$	—	$	—
Oil Gas & Chemical	648		840
Storage Solutions	334		59
Industrial	176		—
Total inter-segment revenues	$	1,158	$	899
Consolidated revenues
Electrical Infrastructure	$	65,625	$	55,673
Oil Gas & Chemical	68,311		53,359
Storage Solutions	144,236		133,291
Industrial	41,159		79,360
Total consolidated revenues	$	319,331	$	321,683
Gross profit (loss)
Electrical Infrastructure	$	4,708	$	(489	)
Oil Gas & Chemical	5,683		4,386
Storage Solutions	20,232		14,518
Industrial	3,961		9,964
Total gross profit	$	34,584	$	28,379
Operating income (loss)
Electrical Infrastructure	$	1,200	$	(3,656	)
Oil Gas & Chemical	1,416		578
Storage Solutions	11,549		7,103
Industrial	936		4,522
Total operating income	$	15,101	$	8,547

Total assets by segment were as follows:



	September 30, 2015		June 30, 2015
Electrical Infrastructure	$	136,564	$	129,725
Oil Gas & Chemical	101,988		108,960
Storage Solutions	172,900		172,857
Industrial	59,360		102,761
Unallocated assets	65,759		54,028
Total segment assets	$	536,571	$	568,331

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8981-108599

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 280
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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+ Details

Acquisitions (Tables)

3 Months Ended

Sep. 30, 2015

HDB, Inc. [Member]

Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]

Schedule of Preliminary Purchase Price Allocation



Current assets	$	1,658
Property, plant and equipment	1,162
Tax deductible goodwill	2,586
Other intangible assets	900
Total assets acquired	6,306
Current liabilities	1,056
Net assets acquired	$	5,250

Uncompleted Contracts (Tables)

3 Months Ended

Sep. 30, 2015

Disclosure Customer Contracts Additional Information [Abstract]

Gross and Net Amount of Uncompleted Contracts

Gross and net amounts on uncompleted contracts are as follows:



	September 30, 2015		June 30, 2015
	(in thousands)
Costs incurred and estimated earnings recognized on uncompleted contracts	$	1,744,572	$	1,633,780
Billings on uncompleted contracts	1,736,243		1,644,413
	$	8,329	$	(10,633	)
Shown on balance sheet as:
Costs and estimated earnings in excess of billings on uncompleted contracts	$	83,604	$	86,071
Billings on uncompleted contracts in excess of costs and estimated earnings	75,275		96,704
	$	8,329	$	(10,633	)

Intangible Assets Including Goodwill (Tables)

3 Months Ended

Sep. 30, 2015

Finite-Lived Intangible Assets [Line Items]

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]



Period ending:
Remainder of Fiscal 2016	$	2,471
Fiscal 2017	3,216
Fiscal 2018	2,876
Fiscal 2019	2,509
Fiscal 2020	2,509
Fiscal 2021	2,506
Thereafter	6,839
Total estimated remaining amortization expense at September 30, 2015	$	22,926

Carrying Value of Goodwill by Segment

The changes in the carrying value of goodwill by segment are as follows:



	Electrical Infrastructure			Oil Gas & Chemical			Storage Solutions			Industrial			Total
	(In thousands)
Goodwill	$	60,027		$	17,008		$	10,586		$	8,897		$	96,518
Cumulative impairment loss (1)	(17,653		)	(3,000		)	(922		)	(3,425		)	(25,000		)
Net balance at June 30, 2015	42,374			14,008			9,664			5,472			71,518
Translation adjustment (2)	(376		)	—			(131		)	(71		)	(578		)
Net balance at September 30, 2015	$	41,998		$	14,008		$	9,533		$	5,401		$	70,940


(1)	A $25.0 million impairment charge was recorded in February 2005.


(2)	The translation adjustments relate to the periodic translation of Canadian Dollar denominated goodwill recorded as a part of prior Canadian acquisitions.

Carrying Value of Other Intangible Assets

Information on the carrying value of other intangible assets is as follows:



		At September 30, 2015
	Useful Life	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
	(Years)	(In thousands)
Intellectual property	6 to 15	$	2,460	$	(1,127	)	$	1,333
Customer based	1.5 to 15	27,566		(7,631		)	19,935
Non-compete agreements	4 to 5	1,354		(874		)	480
Trade names	3 to 5	1,615		(437		)	1,178
Total amortizing intangible assets		$	32,995	$	(10,069	)	$	22,926



		At June 30, 2015
	Useful Life	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
	(Years)	(In thousands)
Intellectual property	6 to 15	$	2,460	$	(1,086	)	$	1,374
Customer based	1.5 to 15	27,837		(7,109		)	20,728
Non-compete agreements	4 to 5	1,354		(802		)	552
Trade name	3 to 5	1,615		(308		)	1,307
Total amortizing intangible assets		$	33,266	$	(9,305	)	$	23,961

Debt (Tables)

3 Months Ended

Sep. 30, 2015

Debt Disclosure [Abstract]

Availability Under the Senior Credit Facility

Availability under the senior credit facility was as follows:



	September 30, 2015		June 30, 2015
	(In thousands)
Senior credit facility	$	200,000	$	200,000
Capacity constraint due to the Senior Leverage Ratio	41,723		54,968
Capacity under the credit facility	158,277		145,032
Borrowings outstanding	9,766		8,804
Letters of credit	23,342		40,587
Availability under the senior credit facility	$	125,169	$	95,641

Earnings per Common Share (Tables)

3 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

Computation of Basic and Diluted Earnings Per Share

The computation of basic and diluted earnings per share is as follows:



	Three Months Ended
	September 30, 2015		September 30, 2014
	(In thousands, except per share data)
Basic EPS:
Net income attributable to Matrix Service Company	$	9,941	$	5,914
Weighted average shares outstanding	26,476		26,470
Basic EPS	$	0.38	$	0.22
Diluted EPS:
Weighted average shares outstanding – basic	26,476		26,470
Dilutive stock options	86		147
Dilutive nonvested deferred shares	488		517
Diluted weighted average shares	27,050		27,134
Diluted EPS	$	0.37	$	0.22

Antidilutive Securities Excluded from the Calculation of Diluted EPS

The following securities are considered antidilutive and have been excluded from the calculation of Diluted EPS:



	Three Months Ended
	September 30, 2015	September 30, 2014
	(In thousands)
Nonvested deferred shares	56	63

Segment Information (Tables)

3 Months Ended

Sep. 30, 2015

Segment Reporting [Abstract]

Results of Operations

(In thousands)



	Three Months Ended
	September 30, 2015		September 30, 2014
Gross revenues
Electrical Infrastructure	$	65,625	$	55,673
Oil Gas & Chemical	68,959		54,199
Storage Solutions	144,570		133,350
Industrial	41,335		79,360
Total gross revenues	$	320,489	$	322,582
Less: Inter-segment revenues
Electrical Infrastructure	$	—	$	—
Oil Gas & Chemical	648		840
Storage Solutions	334		59
Industrial	176		—
Total inter-segment revenues	$	1,158	$	899
Consolidated revenues
Electrical Infrastructure	$	65,625	$	55,673
Oil Gas & Chemical	68,311		53,359
Storage Solutions	144,236		133,291
Industrial	41,159		79,360
Total consolidated revenues	$	319,331	$	321,683
Gross profit (loss)
Electrical Infrastructure	$	4,708	$	(489	)
Oil Gas & Chemical	5,683		4,386
Storage Solutions	20,232		14,518
Industrial	3,961		9,964
Total gross profit	$	34,584	$	28,379
Operating income (loss)
Electrical Infrastructure	$	1,200	$	(3,656	)
Oil Gas & Chemical	1,416		578
Storage Solutions	11,549		7,103
Industrial	936		4,522
Total operating income	$	15,101	$	8,547

Total assets by segment were as follows:



	September 30, 2015		June 30, 2015
Electrical Infrastructure	$	136,564	$	129,725
Oil Gas & Chemical	101,988		108,960
Storage Solutions	172,900		172,857
Industrial	59,360		102,761
Unallocated assets	65,759		54,028
Total segment assets	$	536,571	$	568,331

Acquisitions (Details) - HDB, Inc. [Member] $ in Thousands	Aug. 22, 2014 USD ($)
Business Acquisition [Line Items]
Business Acquisition, Name of Acquired Entity	HDB Ltd. Limited Partnership ("HDB").
Current assets	$ 1,658
Property, plant and equipment	1,162
Business Acquisition, Goodwill, Expected Tax Deductible Amount	2,586
Other intangible assets	900
Total assets acquired	6,306
Current liabilities	1,056
Net assets acquired	5,250
Business Combination, Consideration Transferred	$ 5,250

Acquisitions (Narrative) (Details) - HDB, Inc. [Member] $ in Thousands	Aug. 22, 2014 USD ($)	Aug. 22, 2014 USD ($)
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition	Aug. 22, 2014
Business Acquisition, Name of Acquired Entity		HDB Ltd. Limited Partnership ("HDB").
Business Combination, Consideration Transferred		$ 5,250
Tax deductible goodwill	$ 2,586	$ 2,586

Uncompleted Contracts - Gross and Net Amounts of Uncompleted Contracts (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Jun. 30, 2015
Disclosure Customer Contracts Additional Information [Abstract]
Costs incurred and estimated earnings recognized on uncompleted contracts	$ 1,744,572	$ 1,633,780
Billings on uncompleted contracts	1,736,243	1,644,413
Total	8,329	(10,633)
Shown on balance sheet as:
Costs and estimated earnings in excess of billings on uncompleted contracts	83,604	86,071
Billings on uncompleted contracts in excess of costs and estimated earnings	75,275	96,704
Total	$ 8,329	$ (10,633)

Uncompleted Contracts - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2014	Sep. 30, 2015	Jun. 30, 2015
Customer Contracts [Line Items]
Contract Receivable Retainage, Due in Next Twelve Months		$ 26.3	$ 25.2
Contract Receivable Retainage, Due after Next Twelve Months		$ 1.0	$ 2.8
Change In Accounting Estimate, Financial Effect, Operating Income	$ 3.3
Change in Accounting Estimate, Financial Effect, Net Income	1.3

Intangible Assets Including Goodwill - Carrying Value of Goodwill By Segment (Details) - USD ($)
$ in Thousands

3 Months Ended

Sep. 30, 2015

Jun. 30, 2015

Goodwill [Line Items]

Goodwill

$ 96,518

Cumulative impairment loss

^[1]

(25,000)

Goodwill

$ 71,518

71,518

Goodwill [Roll Forward]

Net balance at June 30, 2015

71,518

Translation adjustment

^[2]

(578)

Net balance at September 30, 2015

70,940

Electrical Infrastructure [Member]

Goodwill [Line Items]

Goodwill

60,027

Cumulative impairment loss

^[1]

(17,653)

Goodwill

42,374

Goodwill [Roll Forward]

Net balance at June 30, 2015

42,374

Translation adjustment

^[2]

(376)

Net balance at September 30, 2015

41,998

Oil Gas & Chemical [Member]

Goodwill [Line Items]

Goodwill

17,008

Cumulative impairment loss

^[1]

(3,000)

Goodwill

14,008

Goodwill [Roll Forward]

Net balance at June 30, 2015

14,008

Translation adjustment

Net balance at September 30, 2015

14,008

Storage Solutions [Member]

Goodwill [Line Items]

Goodwill

10,586

Cumulative impairment loss

^[1]

(922)

Goodwill

9,664

Goodwill [Roll Forward]

Net balance at June 30, 2015

9,664

Translation adjustment

^[2]

(131)

Net balance at September 30, 2015

9,533

Industrial [Member]

Goodwill [Line Items]

Goodwill

8,897

Cumulative impairment loss

^[1]

(3,425)

Goodwill

5,472

$ 5,472

Goodwill [Roll Forward]

Net balance at June 30, 2015

5,472

Translation adjustment

^[2]

(71)

Net balance at September 30, 2015

$ 5,401

[1]	A $25.0 million impairment charge was recorded in February 2005.
[2]	The translation adjustments relate to the periodic translation of Canadian Dollar denominated goodwill recorded as a part of prior Canadian acquisition

Intangible Assets Including Goodwill - Carrying Value of Other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2015	Jun. 30, 2015
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 32,995	$ 33,266
Accumulated Amortization	(10,069)	(9,305)
Net Carrying Amount	22,926
Total intangible assets, net carrying amount	22,926	23,961
Intellectual Property [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	2,460	2,460
Accumulated Amortization	(1,127)	(1,086)
Net Carrying Amount	$ 1,333	$ 1,374
Intellectual Property [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	6 years	6 years
Intellectual Property [Member] \| Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years	15 years
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 27,566	$ 27,837
Accumulated Amortization	(7,631)	(7,109)
Net Carrying Amount	$ 19,935	$ 20,728
Customer Relationships [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	1 year 6 months	1 year 6 months
Customer Relationships [Member] \| Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years	15 years
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 1,354	$ 1,354
Accumulated Amortization	(874)	(802)
Net Carrying Amount	$ 480	$ 552
Noncompete Agreements [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	4 years	4 years
Noncompete Agreements [Member] \| Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years	5 years
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 1,615	$ 1,615
Accumulated Amortization	(437)	(308)
Net Carrying Amount	$ 1,178	$ 1,307
Trade Names [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	3 years	3 years
Trade Names [Member] \| Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years	5 years

Intangible Assets Including Goodwill - Additional Information (Detail) - USD ($)
$ in Millions

3 Months Ended

12 Months Ended

Sep. 30, 2015

Sep. 30, 2014

Jun. 30, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Impairment charge

^[1]

$ 25.0

Amortization expense

$ 0.8

$ 1.2

Minimum [Member] | Intellectual Property [Member]

Finite-Lived Intangible Assets [Line Items]

Finite-Lived Intangible Asset, Useful Life

6 years

Minimum [Member] | Customer Relationships [Member]

Finite-Lived Intangible Assets [Line Items]

Finite-Lived Intangible Asset, Useful Life

1 year 6 months

Minimum [Member] | Noncompete Agreements [Member]

Finite-Lived Intangible Assets [Line Items]

Finite-Lived Intangible Asset, Useful Life

4 years

Minimum [Member] | Trade Names [Member]

Finite-Lived Intangible Assets [Line Items]

Finite-Lived Intangible Asset, Useful Life

3 years

Maximum [Member] | Intellectual Property [Member]

Finite-Lived Intangible Assets [Line Items]

Finite-Lived Intangible Asset, Useful Life

15 years

Maximum [Member] | Customer Relationships [Member]

Finite-Lived Intangible Assets [Line Items]

Finite-Lived Intangible Asset, Useful Life

15 years

Maximum [Member] | Noncompete Agreements [Member]

Finite-Lived Intangible Assets [Line Items]

Finite-Lived Intangible Asset, Useful Life

5 years

Maximum [Member] | Trade Names [Member]

Finite-Lived Intangible Assets [Line Items]

Finite-Lived Intangible Asset, Useful Life

5 years

[1]	A $25.0 million impairment charge was recorded in February 2005.

Intangible Assets Including Goodwill Future Expected Amortization Expense (Details) $ in Thousands	Sep. 30, 2015 USD ($)
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	$ 2,471
Finite-Lived Intangible Assets, Amortization Expense, Year Two	3,216
Finite-Lived Intangible Assets, Amortization Expense, Year Three	2,876
Finite-Lived Intangible Assets, Amortization Expense, Year Four	2,509
Finite-Lived Intangible Assets, Amortization Expense, Year Five	2,509
Finite-Lived Intangible Assets, Amortization Expense, Year Five	2,506
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	6,839
Finite-Lived Intangible Assets, Net	$ 22,926

Debt - Additional Information (Detail) $ in Thousands	3 Months Ended
Debt - Additional Information (Detail) $ in Thousands	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)
Acquired Indefinite-lived Intangible Assets [Line Items]
Credit Agreement Term	5 years
Senior secured revolving credit facility	$ 200,000	$ 200,000
mtrx_LineOfCreditFacilityExpirationDate	Mar. 13, 2019
Senior Leverage Ratio, Maximum	2.50
Senior Leverage Ratio, Minimum	1.00
Fixed Charge Coverage Ratio, Maximum	1.25
Fixed Charge Coverage Ratio, Minimum	1.00
Limit on asset dispositions	$ 20,000
Additional Margin on alternate base rate loans, Minimum	0.25%
Additional Margin on alternate base rate loans, Maximum	1.00%
Additional Margin on LIBOR loans, Minimum	1.25%
Additional Margin on LIBOR loans, Maximum	2.00%
Sublimit on Canadian dollar borrowings	$ 40,000
Additional Margin on CDOR loans, Minimum	1.25%
Additional Margin on CDOR loans, Maximum	2.00%
Additional Margin on Canadian prime rate loans, Minimum	1.75%
Additional Margin on Canadian prime rate loans, Maximum	2.50%
CDOR Rate description	sum of the annual rate of interest, which is the rate determined as being the arithmetic average of the quotations of all institutions listed in respect of the relevant CDOR interest period for Canadian Dollar denominated bankers’ acceptances, plus 0.1%
Canadian prime rate description	greater of (i) the rate of interest per annum most recently announced or established by JPMorgan Chase Bank, N.A., Toronto Branch as its reference rate in effect on such day for determining interest rates for Canadian Dollar denominated commercial loans in Canada and (ii) the CDOR Rate plus 1.0%.
Maximum limit of consolidated funded indebtedness	2.5
Consolidated EBITDA as defined in the Credit Agreement	$ 63,300
Consolidated funded indebtedness	$ 25,100
Minimum [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Unused Credit Facility Fee	0.20%
Maximum [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Unused Credit Facility Fee	0.35%
CDOR Rate [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Basis spread on variable rate basis	0.10%
Canadian Prime Rate [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Variable rate basis	CDOR
Basis spread on variable rate basis	1.00%

Debt - Availability Under The Senior Credit Facility (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Jun. 30, 2015
Debt Disclosure [Abstract]
Senior credit facility	$ 200,000	$ 200,000
Capacity Constraint Due To Senior Leverage Ratio	41,723	54,968
Line Of Credit Facility Maximum Borrowing Capacity After Consideration Of Capacity Constraint	158,277	145,032
Line of Credit Facility, Amount Outstanding	9,766	8,804
Letters of credit subject to the credit facility	23,342	40,587
Availability under the senior credit facility	$ 125,169	$ 95,641

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References + Details

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Jun. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Unapproved change orders	$ 13.1	$ 12.7

Earnings per Common Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share, Basic [Abstract]
Net income	$ 9,941	$ 5,914
Weighted average shares outstanding - basic (shares)	26,476	26,470
Basic EPS (US$ per share)	$ 0.38	$ 0.22
Earnings Per Share, Diluted [Abstract]
Dilutive stock options	86	147
Dilutive nonvested deferred shares	488	517
Diluted weighted average shares (shares)	27,050	27,134
Diluted EPS (US$ per share)	$ 0.37	$ 0.22

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References + Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

Earnings per Common Share - Antidilutive Securities Excluded from the Calculation of Diluted Earnings Per Share (Details) - shares shares in Thousands	3 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Nonvested Deferred Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total antidilutive securities	56	63

Segment Information - Results of Operations (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Jun. 30, 2015
Segment Reporting Information [Line Items]
Gross revenues	$ 320,489	$ 322,582
Consolidated revenues	319,331	321,683
Gross profit	34,584	28,379
Operating income	15,101	8,547
Segment assets	536,571		$ 568,331
Goodwill	70,940		71,518
Electrical Infrastructure [Member]
Segment Reporting Information [Line Items]
Gross revenues	65,625	55,673
Consolidated revenues	65,625	55,673
Gross profit	4,708	(489)
Operating income	1,200	(3,656)
Segment assets	136,564		129,725
Goodwill	41,998		42,374
Oil Gas & Chemical [Member]
Segment Reporting Information [Line Items]
Gross revenues	68,959	54,199
Consolidated revenues	68,311	53,359
Gross profit	5,683	4,386
Operating income	1,416	578
Segment assets	101,988		108,960
Goodwill	14,008		14,008
Storage Solutions [Member]
Segment Reporting Information [Line Items]
Gross revenues	144,570	133,350
Consolidated revenues	144,236	133,291
Gross profit	20,232	14,518
Operating income	11,549	7,103
Segment assets	172,900		172,857
Goodwill	9,533		9,664
Industrial [Member]
Segment Reporting Information [Line Items]
Gross revenues	41,335	79,360
Consolidated revenues	41,159	79,360
Gross profit	3,961	9,964
Operating income	936	4,522
Segment assets	59,360		102,761
Goodwill	5,401		5,472
Other Segments [Member]
Segment Reporting Information [Line Items]
Segment assets	65,759		$ 54,028
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Gross revenues	1,158	899
Intersegment Eliminations [Member] \| Electrical Infrastructure [Member]
Segment Reporting Information [Line Items]
Gross revenues	0	0
Intersegment Eliminations [Member] \| Oil Gas & Chemical [Member]
Segment Reporting Information [Line Items]
Gross revenues	648	840
Intersegment Eliminations [Member] \| Storage Solutions [Member]
Segment Reporting Information [Line Items]
Gross revenues	334	59
Intersegment Eliminations [Member] \| Industrial [Member]
Segment Reporting Information [Line Items]
Gross revenues	$ 176	$ 0