Matrix Service (MTRX) 10-K 11 Sep 17 2017 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2017	Sep. 05, 2017	Dec. 31, 2016
Entity Information [Line Items]
Entity Registrant Name	MATRIX SERVICE CO
Entity Central Index Key	866,273
Document Type	10-K
Document Period End Date	Jun. 30, 2017
Amendment Flag	false
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--06-30
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Public Float			$ 590
Entity Common Stock, Shares Outstanding		26,722,392

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
Revenues	$ 1,197,509	$ 1,311,917	$ 1,343,135
Cost of revenues	1,116,506	1,185,926	1,255,765
Gross profit	81,003	125,991	87,370
Selling, general and administrative expenses	76,144	85,109	78,568
Operating income	4,859	40,882	8,802
Other income (expense):
Interest expense	(2,211)	(852)	(1,236)
Interest income	132	190	468
Other	(334)	(567)	158
Income before income tax expense	2,446	39,653	8,192
Provision for federal, state and foreign income taxes	2,308	14,116	10,090
Net income (loss)	138	25,537	(1,898)
Less: Net income (loss) attributable to noncontrolling interest	321	(3,326)	(19,055)
Net income (loss) attributable to Matrix Service Company	$ (183)	$ 28,863	$ 17,157
Basic earnings per common share (in dollars per share)	$ (0.01)	$ 1.09	$ 0.64
Diluted earnings per common share (in dollars per share)	$ (0.01)	$ 1.07	$ 0.63
Weighted average common shares outstanding:
Basic (in shares)	26,533	26,597	26,603
Diluted (in shares)	26,533	27,100	27,177

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Other comprehensive income (loss), net of tax:
Net income (loss)	$ 138	$ 25,537	$ (1,898)
Foreign currency translation loss (net of tax of $180, $236 and $606 for the years ended June 30, 2017, 2016 and 2015, respectively)	(479)	(919)	(5,744)
Comprehensive income (loss)	(341)	24,618	(7,642)
Less: Comprehensive income (loss) attributable to noncontrolling interest	321	(3,326)	(19,055)
Comprehensive income (loss) attributable to Matrix Service Company	$ (662)	$ 27,944	$ 11,413

Consolidated Statements of Com4

Consolidated Statements of Comprehensive Income (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Foreign currency translation adjustments, tax effect	$ 180	$ 236	$ 606

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Current assets:
Cash and cash equivalents	$ 43,805	$ 71,656
Accounts receivable, less allowances (2017 - $9,887; 2016 - $8,403)	210,953	190,434
Costs and estimated earnings in excess of billings on uncompleted contracts	91,180	104,001
Inventories	3,737	3,935
Income taxes receivable	4,042	9
Other current assets	4,913	5,411
Total current assets	358,630	375,446
Property, plant and equipment, at cost:
Land and buildings	38,916	39,224
Construction equipment	94,298	90,386
Transportation equipment	48,574	49,046
Office equipment and software	36,556	29,577
Construction in progress	5,952	7,475
Total property, plant and equipment - at cost	224,296	215,708
Accumulated depreciation	(144,022)	(130,977)
Property, plant and equipment - net	80,274	84,731
Goodwill	113,501	78,293
Other intangible assets	26,296	20,999
Deferred income taxes	3,385	3,719
Other assets	3,944	1,779
Total assets	586,030	564,967
Current liabilities:
Accounts payable	105,649	141,445
Billings on uncompleted contracts in excess of costs and estimated earnings	75,127	58,327
Accrued wages and benefits	20,992	27,716
Accrued insurance	9,340	9,246
Income taxes payable	169	2,675
Other accrued expenses	7,699	6,621
Total current liabilities	218,976	246,030
Deferred income taxes	128	3,198
Borrowings under senior revolving credit facility	44,682	0
Other liabilities	435	173
Total liabilities	264,221	249,401
Commitments and contingencies
Stockholders' equity:
Common stock—$.01 par value; 60,000,000 shares authorized; 27,888,217 shares issued as of June 30, 2017 and June 30, 2016; 26,600,562 and 26,297,145 shares outstanding as of June 30, 2017 and June 30, 2016	279	279
Additional paid-in capital	128,419	126,958
Retained earnings	222,974	223,257
Accumulated other comprehensive loss	(7,324)	(6,845)
Total stockholders' equity before treasury stock	344,348	343,649
Less treasury stock, at cost — 1,287,655 and 1,591,072 shares as of June 30, 2017 and June 30, 2016	(22,539)	(26,907)
Total Matrix Service Company stockholders' equity	321,809	316,742
Noncontrolling interest	0	(1,176)
Total stockholders' equity	321,809	315,566
Total liabilities and stockholders' equity	$ 586,030	$ 564,967

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 9,887	$ 8,403
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
Common stock, shares outstanding	26,600,562	26,297,145
Treasury stock, shares	1,287,655	1,447,394

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Operating activities:
Net income (loss)	$ 138	$ 25,537	$ (1,898)
Adjustments to reconcile net income to net cash provided by operating activities, net of effects of acquisitions :
Depreciation and amortization	21,602	21,441	23,480
Deferred income taxes	(2,556)	1,871	(1,052)
(Gain) loss on sale of property, plant and equipment	(142)	(39)	(252)
Provision for uncollectible accounts	1,748	6,034	357
Stock-based compensation expense	7,461	6,317	6,302
Other	289	240	238
Changes in operating assets and liabilities increasing (decreasing) cash, net of effects from acquisitions:
Accounts receivable	(11,932)	4,152	6,831
Costs and estimated earnings in excess of billings on uncompleted contracts	13,567	(17,930)	(13,063)
Inventories	198	606	272
Other assets and liabilities	(7,641)	7,380	11,558
Accounts payable	(37,047)	14,698	12,957
Billings on uncompleted contracts in excess of costs and estimated earnings	5,212	(38,377)	(11,736)
Accrued expenses	(9,643)	1,657	(7,754)
Net cash provided by operating activities	(18,746)	33,587	26,240
Investing activities:
Acquisitions, net of cash acquired (Note 2)	(40,819)	(13,049)	(5,551)
Acquisition of property, plant and equipment	(11,908)	(13,939)	(15,773)
Proceeds from asset sales	1,308	422	750
Net cash used by investing activities	(51,419)	(26,566)	(20,574)
Financing activities:
Advances under senior revolving credit facility	126,933	10,213	11,165
Repayments of advances under senior revolving credit facility	(82,251)	(19,017)	(13,982)
Payment of debt amendment fees	(1,073)	0	0
Open market purchase of treasury shares	0	(10,461)	(5,000)
Issuances of common stock	253	638	493
Proceeds from issuance of common stock under employee stock purchase plan	305	335	298
Repurchase of common stock for payment of statutory taxes due on equity-based compensation	(2,290)	(4,588)	(2,528)
Capital contributions from noncontrolling interest	855	10,892	8,546
Repayment of acquired long-term debt	0	(1,858)	0
Net cash provided (used) by financing activities	42,732	(13,846)	(1,008)
Effect of exchange rate changes on cash	(418)	(758)	(2,534)
Net increase (decrease) in cash and cash equivalents	(27,851)	(7,583)	2,124
Cash and cash equivalents, beginning of period	71,656	79,239	77,115
Cash and cash equivalents, end of period	43,805	71,656	79,239
Other cash flow information:
Cash paid during the period for income taxes	11,968	9,365	6,960
Cash paid during the period for interest	1,788	881	1,281
Non-cash investing and financing activities:
Accrued working capital adjustment	1,687	0	0
Purchases of property, plant and equipment on account	483	193	439
Assumption of debt from acquisition	$ 0	$ 1,858	$ 0

Consolidated Statements of Chan

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
Balances, beginning at Jun. 30, 2014	$ 282,283	$ 279	$ 119,777	$ 177,237	$ (16,595)	$ (182)	$ 1,767
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Capital contributions from Non-controlling Interest	8,546						8,546
Net income (loss)	(1,898)
Other comprehensive loss	(5,744)					(5,744)
Treasury Shares Sold to Employee Stock Purchase Plan	298		134		164
Exercise of stock options	493		(275)	0	768
Issuance of deferred shares	0		(4,702)		4,702
Treasury shares repurchased to satisfy tax withholding obligations	(2,528)				(2,528)
Tax effect of exercised stock options and vesting of deferred shares	1,802		1,802
Open market purchase of treasury shares	(5,000)				(5,000)
Stock-based compensation expense	6,302		6,302
Balances, ending 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 (Loss) Attributable to Parent	17,157			17,157
Net Income (Loss) Attributable to Noncontrolling Interest	(19,055)
Capital contributions from Non-controlling Interest	10,892						10,892
Net income (loss)	25,537
Other comprehensive loss	(919)					(919)
Treasury Shares Sold to Employee Stock Purchase Plan	335		177		158
Exercise of stock options	638		14	0	624
Issuance of deferred shares	0		(5,849)		5,849
Treasury shares repurchased to satisfy tax withholding obligations	(4,588)				(4,588)
Tax effect of exercised stock options and vesting of deferred shares	3,261		3,261
Open market purchase of treasury shares	(10,461)				(10,461)
Stock-based compensation expense	6,317		6,317
Balances, ending at Jun. 30, 2016	315,566	279	126,958	223,257	(26,907)	(6,845)	(1,176)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent	28,863			28,863
Net Income (Loss) Attributable to Noncontrolling Interest	(3,326)						(3,326)
Cumulative Effect of New Accounting Principle in Period of Adoption	0		100	(100)
Beginning equity balances, as adjusted	315,566	279	127,058	223,157	(26,907)	(6,845)	(1,176)
Capital contributions from Non-controlling Interest	855						855
Net income (loss)	138
Other comprehensive loss	(479)					(479)
Treasury Shares Sold to Employee Stock Purchase Plan	305		(25)		330
Exercise of stock options	253		(317)		570
Issuance of deferred shares	0		(5,758)		5,758
Treasury shares repurchased to satisfy tax withholding obligations	(2,290)				(2,290)
Stock-based compensation expense	7,461		7,461
Balances, ending at Jun. 30, 2017	321,809	$ 279	$ 128,419	222,974	$ (22,539)	$ (7,324)	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent	(183)			$ (183)
Net Income (Loss) Attributable to Noncontrolling Interest	$ 321

Consolidated Statements of Cha9

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - shares	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Open market purchase of treasury shares, shares	0	654,958	0
Employee Stock Purchase Plans, shares	16,609	17,304	13,243
Exercise of stock options, shares	24,813	68,037	55,200
Issuance of deferred shares, shares	396,530	631,443	326,763
Treasury shares repurchased to satisfy tax withholding obligations	134,535	205,504	105,058

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Jun. 30, 2017
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Organization and Basis of Presentation The consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States and include the accounts of Matrix Service Company (“Matrix” or the “Company”) and its subsidiaries, all of which are wholly owned. Intercompany transactions and balances have been eliminated in consolidation. The Company operates in the United States, Canada, South Korea, Australia and Colombia. The Company’s reportable segments are Electrical Infrastructure, Oil Gas & Chemical, Storage Solutions and Industrial. Use of Estimates The preparation of financial statements requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. We believe the most significant estimates and judgments are associated with revenue recognition, the recoverability tests that must be periodically performed with respect to our goodwill and other intangible assets, valuation reserves on our accounts receivable and deferred tax assets, and the estimation of loss contingencies, including liabilities associated with litigation and with the self-insured retentions on our insurance programs. Actual results could materially differ from those estimates. Revenue Recognition Matrix records revenue on fixed-price contracts on a percentage-of-completion basis, primarily based on costs incurred to date compared to the total estimated contract cost. The Company records revenue on reimbursable and time and material contracts on a proportional performance basis as costs are incurred. Contracts in process are valued at cost plus accrued profits less billings on uncompleted contracts. Contracts are generally considered substantially complete when field construction is completed. The elapsed time from award of a contract to completion of performance may be in excess of one year. Matrix includes pass-through revenue and costs on cost-plus contracts, which are customer-reimbursable materials, equipment and subcontractor costs, when Matrix determines that it is responsible for the procurement and management of such cost components. Matrix has numerous contracts that are in various stages of completion which require estimates to determine the appropriate cost and revenue recognition. The Company has a history of making reasonably dependable estimates of the extent of progress towards completion, contract revenues and contract costs, and accordingly, does not believe significant fluctuations are likely to materialize. However, current estimates may be revised as additional information becomes available. If estimates of costs to complete fixed-price contracts indicate a loss, provision is made through a contract write-down for the total loss anticipated. A number of our contracts contain various cost and performance incentives and penalties that impact the earnings we realize from our contracts, and adjustments related to these incentives and penalties are recorded in the period, on a percentage-of-completion basis, when estimable and probable. Indirect costs, such as salaries and benefits, supplies and tools, equipment costs and insurance costs, are charged to projects based upon direct labor hours and overhead allocation rates per direct labor hour. Warranty costs are normally incurred prior to project completion and are charged to project costs as they are incurred. Warranty costs incurred subsequent to project completion were not material for the periods presented. Overhead allocation rates are established annually during the budgeting process. Precontract Costs Precontract costs are costs incurred in anticipation of obtaining a contract that will result in no future benefit unless the contract is obtained. The Company generally expenses precontract costs to cost of revenue as incurred, but, in certain cases their recognition may be deferred if specific criteria are met. We had no deferred precontract costs at June 30, 2017 or 2016. Change Orders and Claims Recognition Change orders are modifications of an original contract that effectively change the existing provisions of the contract. Change orders may include changes in specifications or designs, manner of performance, facilities, equipment, materials, sites and period of completion of the work. Matrix or our clients may initiate change orders. The client's agreement to the terms of change orders is, in many cases, reached prior to work commencing; however, sometimes circumstances require that work progress prior to obtaining client agreement. Costs related to change orders are recognized as incurred. Revenues attributable to change orders that are unapproved as to price or scope are recognized to the extent that costs have been incurred if the amounts can be reliably estimated and their realization is probable. Revenues in excess of the costs attributable to change orders that are unapproved as to price or scope are recognized only when realization is assured beyond a reasonable doubt. Change orders that are unapproved as to both price and scope are evaluated as claims. Claims are amounts in excess of the agreed contract price that we seek to collect from customers or others for delays, errors in specifications and designs, contract terminations, change orders in dispute or unapproved as to both scope and price or other causes of anticipated additional costs incurred by us. Recognition of amounts as additional contract revenue related to claims is appropriate only if it is probable that the claims will result in additional contract revenue and if the amount can be reliably estimated. We must determine if: • there is a legal basis for the claim; • the additional costs were caused by circumstances that were unforeseen by the Company and are not the result of deficiencies in our performance; • the costs are identifiable or determinable and are reasonable in view of the work performed; and • the evidence supporting the claim is objective and verifiable. If all of these requirements are met, revenue from a claim is recorded only to the extent that we have incurred costs relating to the claim. Unapproved change orders and claims are more fully discussed in Note 7—Contingencies. Cash and Cash Equivalents The Company includes as cash equivalents all investments with original maturities of three months or less which are readily convertible into cash. The Company had approximately $0.3 million of restricted cash related to a customer deposit at June 30, 2017 and 2016. We have cash on deposit at June 30, 2017 with banks in the United States, Canada, South Korea, Australia and Colombia in excess of Federal Deposit Insurance Corporation ("FDIC"), Canada Deposit Insurance Corporation ("CDIC"), Korea Deposit Insurance Corporation ("KDIC"), Financial Claims Scheme ("FCS") and Fondo de Garantias de Instituciones Financieras protection limits, respectively. The United States Dollar equivalent of Canadian, South Korean, Australian and Colombian deposits totaled $7.7 million as of June 30, 2017. Accounts Receivable Accounts receivable are carried on a gross basis, less the allowance for uncollectible accounts. The Company’s customers consist primarily of major integrated oil companies, steel companies, independent refiners and marketers, power companies, petrochemical companies, pipeline companies, mining companies, contractors and engineering firms. The Company is exposed to the risk of individual customer defaults or depressed cycles in our customers’ industries. To mitigate this risk many of our contracts require payment as projects progress or advance payment in some circumstances. In addition, in most cases the Company can place liens against the property, plant or equipment constructed or terminate the contract if a material contract default occurs. Management estimates the allowance for uncollectible accounts based on existing economic conditions, the financial condition of its customers and the amount and age of past due accounts. Accounts are written off against the allowance for uncollectible accounts only after all collection attempts have been exhausted. Retentions Contract retentions collectible beyond one year are included in Other Assets in the Consolidated Balance Sheets. Accounts payable retentions are generally settled within one year. Loss Contingencies Various legal actions, claims and other contingencies arise in the normal course of our business. Contingencies are recorded in the consolidated financial statements, or are otherwise disclosed, in accordance with ASC 450-20, “Loss Contingencies”. Specific reserves are provided for loss contingencies to the extent we conclude that a loss is both probable and estimable. We use a case-by-case evaluation of the underlying data and update our evaluation as further information becomes known. We believe that any amounts exceeding our recorded accruals should not materially affect our financial position, results of operations or liquidity. However, the results of litigation are inherently unpredictable and the possibility exists that the ultimate resolution of one or more of these matters could result in a material effect on our financial position, results of operations or liquidity. Legal costs are expensed as incurred. Inventories Inventories consist primarily of steel plate and pipe and aluminum coil and extrusions. Cost is determined primarily using the average cost method and inventories are stated at the lower of cost or net realizable value. Depreciation Depreciation is computed using the straight-line method over the estimated useful lives of the depreciable assets. Depreciable lives are as follows: buildings— 40 years, construction equipment— 3 to 15 years, transportation equipment— 3 to 5 years, and office equipment and software— 3 to 10 years. Leasehold improvements are amortized over the shorter of the useful life of the asset or the lease term. Impairment of Long-Lived Assets The Company evaluates long-lived assets for impairment when events or changes in circumstances indicate, in management’s judgment, that the carrying value of such assets used in operations may not be recoverable. The determination of whether an impairment has occurred is based on management’s estimate of undiscounted future cash flows attributable to the assets as compared to the carrying value of the assets. If an impairment has occurred, the amount of the impairment recognized is determined by estimating the fair value of the assets and, to the extent the carrying value exceeds the fair value of the assets, recording a loss provision. For assets identified to be disposed of in the future, the carrying value of the assets are compared to the estimated fair value less the cost of disposal to determine if an impairment has occurred. Until the assets are disposed of, an estimate of the fair value is redetermined when related events or circumstances change. Goodwill Goodwill represents the excess of the purchase price of acquisitions over the acquisition date fair value of the net identifiable tangible and intangible assets acquired. In accordance with current accounting guidance, goodwill is not amortized and is tested at least annually for impairment at the reporting unit level, which is a level below our reportable segments. We perform our annual test during the fourth quarter of each fiscal year and in any other period in which indicators of impairment warrant additional tests. The goodwill impairment test involves comparing management’s estimate of the fair value of a reporting unit with its carrying value, including goodwill. If the fair value of a reporting unit exceeds its carrying value, then goodwill is not impaired. If the fair value of a reporting unit is less than its carrying value, then goodwill is impaired to the extent of the difference, but the impairment may not exceed the balance of goodwill assigned to that reporting unit. Management utilizes a discounted cash flow analysis, referred to as an income approach, to determine the estimated fair value of our reporting units. Significant judgments and assumptions including the discount rate, anticipated revenue growth rate, gross margins, operating expenses, working capital needs and capital expenditures are inherent in these fair value estimates, which are based on our operating and capital budgets and on our strategic plan. As a result, actual results may differ from the estimates utilized in our income approach. The use of alternate judgments and/or assumptions could result in a fair value that differs from our estimate and could result in the recognition of an impairment charge in the financial statements. As a result of these uncertainties, we utilize multiple scenarios and assign probabilities to each of the scenarios in the income approach. We also consider the combined carrying values of our reporting units to our market capitalization. Other Intangible Assets Intangible assets that have finite useful lives are amortized by the straight-line method over their useful lives ranging from 1 year to 15 years. A finite intangible asset is considered impaired when its carrying amount is not recoverable and exceeds the asset's fair value. The carrying amount is deemed unrecoverable if it is greater than the sum of undiscounted cash flows expected to result from use and eventual disposition of the asset. An impairment loss is equal to the excess of the carrying amount over the fair value of the asset. If quoted market prices are not available, the fair values of the intangible assets are based on present values of expected future cash flows or royalties avoided using discount rates commensurate with the risks involved. Insurance Reserves We maintain insurance coverage for various aspects of our operations. However, we retain exposure to potential losses through the use of deductibles, coverage limits and self-insured retentions. We establish reserves for claims using a combination of actuarially determined estimates and case-by-case evaluations of the underlying claim data and update our evaluations as further information becomes known. Judgments and assumptions are inherent in our reserve accruals; as a result, changes in assumptions or claims experience could result in changes to these estimates in the future. If actual results of claim settlements are different than the amounts estimated we may be exposed to future gains and losses that could be material. Stock-Based Compensation The Company has issued stock options and nonvested deferred share awards under its long-term incentive compensation plans. The fair value of these awards is calculated at grant date. The fair value of time-based, nonvested deferred shares is the value of the Company’s common stock at the grant date. The fair value of market-based nonvested deferred shares is based on several factors, including the probability that the market condition specified in the grant will be achieved. The fair value of stock options is determined based on the Black-Scholes option pricing model. For all stock-based awards, expense is recognized over the requisite service period with forfeitures recorded as they occur. 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, with the help of professional tax advisors. Therefore, we estimate and provide for amounts of additional income taxes that may be assessed by the various taxing authorities. Foreign Currency The functional currencies of the Company’s operations in Canada, South Korea, Australia and Colombia are the Canadian Dollar, South Korean Won, U.S. Dollar and Colombian Peso, respectively. For subsidiaries with operations using a foreign functional currency, assets and liabilities are translated at the year end exchange rates and the income statement accounts are translated at average exchange rates throughout the year. Translation gains and losses are reported in Accumulated Other Comprehensive Income (Loss) in the Consolidated Statements of Changes in Stockholders’ Equity and in Other Comprehensive Income (Loss) in the Consolidated Statements of Comprehensive Income. Transaction gains and losses are reported as a component of Other income (expense) in the Consolidated Statements of Income. Recently Issued Accounting Standards Accounting Standards Update 2014-09, Revenue from Contracts with Customers (Topic 606) 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"). The ASU is effective for annual reporting periods beginning after December 15, 2017, including interim reporting periods within that reporting period. Early adoption is permitted on a limited basis. Management is currently evaluating the impact of adopting the ASU on the Company's financial position, results of operations, cash flows and related disclosures. Adoption of this ASU is expected to affect the manner in which the Company determines the unit of account for its projects (i.e., performance obligations). Under existing guidance, the Company may have multiple performance obligations for large, complex projects. Upon adoption, the Company expects that similar projects may have fewer performance obligations, possibly just one in some cases, which will result in a more constant recognition of revenue and profit over the term of the project. The Company will adopt this standard on July 1, 2018 using the modified retrospective method of application, which may result in a cumulative effect adjustment to retained earnings as of the date of adoption. Management has completed its review of the new revenue standard and is currently developing a plan to review its contracts in order to confirm its understanding of how the new standard will impact its revenue recognition policy, disclosures, processes and internal controls. At this time, we cannot reliably estimate the amount of any potential retrospective adjustment. Accounting Standards Update 2014-15, Presentation of Financial Statements—Going Concern (Subtopic 205-40): 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 ASU was adopted during the Company's first fiscal quarter ending September 30, 2016. In connection with the adoption of the ASU, the Company now performs an assessment of its ability to continue as a going concern on a quarterly basis. Disclosure regarding the status of the Company's ability to continue as a going concern is required when there are conditions or events that raise substantial doubt about its ability to continue as a going concern within one year after the date that the financial statements are issued. 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. We adopted this standard on July 1, 2016 with no material impact to the Company's financial statements. Accounting Standards Update 2016-02, Leases (Topic 842) On February 25, 2016, the FASB issued ASU 2016-02. The amendments in this update require, among other things, that lessees recognize the following for all leases (with the exception of short-term leases) at the commencement date: (1) a lease liability, which is a lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis; and (2) a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. Lessees and lessors must apply a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The ASU is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted, but we do not plan to do so at this time. We are currently evaluating the ASU's expected impact on our financial statements. See Note 8 - Operating Leases for more information about the timing and amount of future operating lease payments, which we believe is indicative of the materiality of adoption of the ASU to our financial statements. Accounting Standards Update 2016-09, Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting On March 30, 2016, the FASB issued ASU 2016-09, which simplified several aspects of accounting for stock-based compensation transactions, including the accounting for income taxes and forfeitures and statutory tax withholding requirements. The Company adopted the ASU during its first fiscal quarter ending September 30, 2016. The following is a description of the key provisions of the ASU and their impacts to the Company's financial statements: Accounting for Income Taxes : The amendments require the Company to recognize excess tax benefits or tax deficiencies in its provision for income taxes in its consolidated statements of income during the period of vesting or exercise of its nonvested deferred share awards and stock options, respectively, for which it expects to receive an income tax deduction. Previously, the Company recognized any excess tax benefits in additional paid-in capital ("APIC") in the balance sheet and any tax deficiencies were recognized as a reduction of APIC to the extent the Company has accumulated excess tax benefits. Any tax deficiencies in excess of accumulated excess tax benefits in APIC were recognized in the provision for income taxes. The amendments also require the Company to only present excess tax benefits and tax deficiencies in the operating section of its statements of cash flows as a component of deferred tax activity. Previously, the Company was required to present such items in both the financing section and operating section of its statements of cash flows. Amendments related to the recognition of excess tax benefits and tax deficiencies in income are required to be applied prospectively, and amendments related to the cash flow statement presentation of excess tax benefits and tax deficiencies may be applied either retrospectively or prospectively. The Company applied the amendments requiring the recognition of excess tax benefits and tax deficiencies in income prospectively. As a result, the Company recognized $0.5 million of excess tax benefits in its provision for income taxes during the year ended June 30, 2017, which increased basic and diluted earnings per share by $0.02 . Under the prior accounting standard, the Company would have recognized the excess tax benefits in equity as APIC. The amendments relating to the presentation of excess tax benefits and tax deficiencies in the statement of cash flows were applied retrospectively. The effect of the retrospective adjustment was to eliminate the presentation of an operating cash outflow and a financing cash inflow for excess tax benefits on exercised stock options and vesting of deferred shares. These eliminations decreased net cash provided by operating activities by $3.3 million and decreased net cash used by financing activities by $3.3 million for the year ended June 30, 2016, and decreased net cash provided by operating activities by $1.8 million and increased cash provided by financing activities by $1.8 million for the year ended June 30, 2015. Net cash flows did not change in either year as a result of the retrospective adjustment. Accounting for Forfeitures : The amendments in this ASU allow the Company to elect, as a company-wide accounting policy, either to continue to estimate the amount of forfeitures to exclude from compensation expense or to exclude forfeitures from compensation expense as they occur. Upon the adoption of the ASU during the first quarter of fiscal 2017, the Company elected to account for forfeitures as they occur. The Company is required to apply these amendments on a modified retrospective basis with a cumulative adjustment to retained earnings as of the beginning of the fiscal year. The Company recorded a modified retrospective adjustment to reduce the June 30, 2016 retained earnings balance and increase the APIC balance by $0.1 million each. Statutory Tax Withholding Requirements : Under the prior accounting standard, an entire award must be classified as a liability if the fair value of the shares withheld exceeds the Company's minimum statutory withholding obligation. Under the ASU, the Company is allowed to withhold shares with a fair value up to the amount of tax owed using the maximum statutory tax rate in the employee's applicable jurisdictions. The Company is allowed to determine one maximum rate for all employees in each jurisdiction, rather than a rate for each employee in the jurisdiction. Also, the ASU requires that cash outflows to reacquire shares withheld for taxes to be classified in the financing section of the statement of cash flows. The Company adopted the ASU during the first quarter of fiscal 2017. Since the Company did not have any awards classified as liabilities due to statutory tax withholding requirements as of June 30, 2017, and since the Company already presented its cash outflows for reacquiring shares withheld for taxes as a financing activity in its statements of cash flows, these amendments did not have any impact on its financial statements upon adoption. The Company does not expect changes to employee withholdings for stock compensation to have a material impact to the financial statements. Accounting Standards Update 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments On June 16, 2016, the FASB issued ASU 2016-13, which will change how the Company accounts for its allowance for uncollectible accounts. The amendments in this update require a financial asset (or a group of financial assets) to be presented at the net amount expected to be collected. The income statement will reflect any increases or decreases of expected credit losses that have taken place during the period. The measurement of expected credit losses is based on relevant information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectibility of the reported amount. Current GAAP delays the recognition of the full amount of credit losses until the loss is probable of occurring. The amendments in this update eliminate the probable initial recognition threshold and, instead, reflect the Company's current estimate of all expected credit losses. In addition, current guidance limits the information the Company may consider in measuring a credit loss to its past events and current conditions. The amendments in this update broaden the information the Company may consider in developing its expected credit loss estimate to include forecasted information. The amendments in this update are effective for the Company on July 1, 2020 and the Company may early adopt on July 1, 2019. The Company must apply the amendments in this update through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective. At this time, the Company does not expect this update to have a material impact to its estimate of the allowance for uncollectible accounts. Accounting Standards Update 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment On January 26, 2017, the FASB issued ASU 2017-04, which simplifies the goodwill impairment test by eliminating step two from the procedure. Previously, goodwill was tested for impairment by performing a two-step test. The first step involves determining the fair value of a reporting unit and comparing it to the carrying amount of the reporting unit's net assets. If the fair value of the reporting unit is less than its carrying amount, then the goodwill assigned to that reporting unit is determined to be impaired and step two must then be completed to measure the amount of the impairment. Step two involved measuring the reporting unit's assets and liabilities at fair value following a process similar to determining the fair value of assets acquired and liabilities assumed in a business combination. The net fair value of the assets acquired and liabilities assumed was then compared to the fair value of the reporting unit in order to compute the implied goodwill for the reporting unit. The difference between the carrying amount of the reporting unit's goodwill and the amount of the implied goodwill computed was the amount of the goodwill impairment to be recognized. Under ASU 2017-04, instead of performing step two of the test, the Company will recognize an impairment charge to the extent a reporting unit's fair value is less than the carrying amount of its net assets, as indicated by step one of the test. The standard must be applied prospectively and must be adopted in fiscal years beginning after December 15, 2019. Early adoption is permitted and the Company adopted the ASU during its fourth fiscal quarter of 2017. The Company performed its annual goodwill impairment test on May 31, 2017 in accordance with the adopted ASU. Accounting Standards Update 2017-09, Compensation-Stock Compensation (Topic 718): Scope of Modification Accounting In May

Acquisitions

Acquisitions	12 Months Ended
	Jun. 30, 2017
Business Combinations [Abstract]
Acquisitions	Acquisitions Purchase of Houston Interests, LLC On December 12, 2016 , the Company completed the acquisition of Houston Interests, LLC ("Houston Interests"), a premier global solutions company that provides consulting, engineering, design, construction services and systems integration. Houston Interests brings expertise to the Company in natural gas processing; sulfur recovery, processing and handling; liquid terminals, silos and other bulk storage; process plant design; power generation environmental controls and material handling; industrial power distribution; electrical, instrumentation and controls; marine structures; material handling systems and terminals for cement, sulfur, fertilizer, coal and grain; and process heaters. The business has been included in our Matrix PDM Engineering, Inc. subsidiary, and its operating results have been included in the Oil Gas & Chemical and Industrial segments. The Company purchased all of the equity interests of Houston Interests for $42.5 million, net of working capital adjustments and cash acquired. The consideration paid as of June 30, 2017 is as follows (in thousands): Cash paid for equity interest $ 46,000 Cash paid for working capital 5,150 Less: cash acquired (10,331 ) Cash consideration paid 40,819 Accrued working capital adjustment 1,687 Net purchase price $ 42,506 The Company funded the equity interest portion of the consideration paid from borrowings under the Company's senior secured revolving credit facility (See Note 5). The purchase of working capital was paid with cash on hand. The net 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 preliminary net purchase price allocation (in thousands): Cash and cash equivalents $ 10,331 Accounts receivable 10,273 Costs and estimated earnings in excess of billings on uncompleted contracts 746 Other current assets 454 Current assets 21,804 Property, plant and equipment 942 Goodwill 35,146 Other intangible assets 10,220 Total assets acquired 68,112 Accounts payable 962 Billings on uncompleted contracts in excess of costs and estimated earnings 11,648 Other accrued expenses 2,475 Current liabilities 15,085 Other liabilities 190 Net assets acquired 52,837 Less: cash acquired 10,331 Net purchase price $ 42,506 The goodwill recognized from the acquisition is primarily attributable to the technical expertise of the acquired workforce and the complementary nature of Houston Interests' operations, which the Company believes will enable the combined entity to expand its service offerings and enter new markets. All of the goodwill recognized is deductible for income tax purposes. The fair value of the net assets acquired is preliminary pending the final valuation of those assets. As a result, goodwill is also preliminary since it has been recorded as the excess of the purchase price over the estimated fair value of the net assets acquired. The Company agreed to pay the previous owners up to $2.6 million for any unused portion of acquired warranty obligations outstanding as of June 30, 2017. This agreement was settled for $1.7 million , which was paid in July 2017. This settlement was reflected as a decrease to the acquired current liabilities and an increase to the net purchase price. The Company incurred $0.6 million of expenses related to closing the acquisition during the year ended June 30, 2017, which were included within selling, general and administrative expenses in the consolidated statements of income. During the year ended June 30, 2017, the acquired business contributed revenues of $33.4 million and operating income of $1.3 million . The unaudited financial information in the table below summarizes the combined results of operations of Matrix Service Company and Houston Interests for the years ended June 30, 2017 and 2016, on a pro forma basis, as though the companies had been combined as of July 1, 2015. The pro forma financial information presented in the table below is for informational purposes only and is not indicative of the results of operations that would have been achieved if the acquisition had taken place at July 1, 2015 nor should it be taken as indicative of future consolidated results of operations. Twelve Months Ended June 30, 2017 June 30, 2016 (In thousands, except per share data) Revenues $ 1,233,372 $ 1,427,313 Net income attributable to Matrix Service Company $ 7,326 $ 32,352 Basic earnings per common share $ 0.28 $ 1.22 Diluted earnings per common share $ 0.27 $ 1.19 The pro forma financial information presented in the table above includes the following adjustments to the combined entities' historical financial statements: • The combined entities recorded approximately $3.3 million of acquisition and integration expenses during the year ended June 30, 2017, which were transferred in the pro forma earnings to the year ended June 30, 2016 in order to report them as if they were incurred on July 1, 2015. Pro forma earnings were adjusted to include integration expenses that would have been recognized had the acquisition occurred on July 1, 2015 of $0.8 million and $0.9 million during the years ended June 30, 2017 and 2016, respectively. • Interest expense for the combined entities was increased by $0.7 million for the year ended June 30, 2017 and by $1.4 million during the year ended June 30, 2016. The increase was attributable to the assumption that the Company's borrowings of $46.0 million used to fund a portion of the acquisition had been outstanding as of July 1, 2015. This increase was partially offset by the assumption that Houston Interests' former debt was extinguished as of July 1, 2015. • Depreciation and intangible asset amortization expense for the combined entities was reduced by $1.4 million during the year ended June 30, 2017 and was increased by $1.8 million during the year ended June 30, 2016. These adjustments are primarily due to the recognition of amortizable intangible assets as part of the acquisition and the effect of fair value adjustments to acquired property, plant and equipment. • Pro forma earnings were adjusted to include additional income tax expense of $2.0 million and $2.2 million during the years ended June 30, 2017 and 2016, respectively. Houston Interests was previously an exempt entity and income taxes were not assessed in its historical financial information. Purchase of Baillie Tank Equipment, Ltd. On February 1, 2016 , the Company completed the acquisition of all outstanding stock of Baillie Tank Equipment, Ltd. (“BTE”), an internationally-based company with nearly 20 years of experience in the design and manufacture of products for use on aboveground storage tanks. Founded in 1998, BTE is a provider of tank products including geodesic domes, aluminum internal floating roofs, floating suction and skimmer systems, roof drain systems, and seals. BTE is headquartered in Sydney, Australia with a manufacturing facility in Seoul, South Korea. The Company acquired BTE to expand its service offerings of certain technical solutions for aboveground storage tanks. The business is now known as Matrix Applied Technologies, and its operating results are included in the Storage Solutions segment. The Company purchased BTE with cash on-hand for a net purchase price of $13.0 million. The Company paid $15.4 million when including the subsequent repayment of long-term debt acquired and the settlement of certain other liabilities acquired, and excluding the cash acquired and certain amounts owed to the former owners for working capital adjustments. The net 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 final purchase price allocation (in thousands): Current assets $ 5,574 Property, plant and equipment 4,347 Goodwill 7,030 Other intangible assets 720 Other assets 233 Total assets acquired 17,904 Current liabilities 1,669 Deferred income taxes 329 Long-term debt 1,858 Other liabilities 407 Net assets acquired 13,641 Less: cash acquired 592 Net purchase price $ 13,049 The goodwill recognized from the acquisition is attributable to the synergies of combining our operations and the technical expertise of the acquired workforce. None of the goodwill recognized is deductible for income tax purposes. The Company incurred $1.2 million of expenses related to the acquisition for the year ended June 30, 2016, which are included within selling, general and administrative expenses in the consolidated statements of income. The acquired business contributed revenues of $7.8 million and operating income of $0.5 million during the year ended June 30, 2017, and contributed revenues of $5.4 million and operating income of $0.3 million for the period from February 1, 2016 to June 30, 2016. 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 advanced a strategic goal of the Company to expand into the upstream energy market. The acquisition purchase price was $5.6 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 $ 1,645 Property, plant and equipment 1,001 Tax deductible goodwill 3,065 Other intangible assets 900 Total assets acquired 6,611 Current liabilities 1,060 Net assets acquired $ 5,551 All of the recorded goodwill from the HDB acquisition is tax deductible. The operating data related to this acquisition was not material.

Customer Contracts

Customer Contracts	12 Months Ended
	Jun. 30, 2017
Contractors [Abstract]
Customer 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 on uncompleted contracts is reported as a current liability. Gross and net amounts on uncompleted contracts are as follows: June 30, June 30, (In thousands) Costs and estimated earnings recognized on uncompleted contracts $ 1,919,054 $ 1,875,014 Billings on uncompleted contracts 1,903,001 1,829,340 $ 16,053 $ 45,674 Shown on balance sheet as: Costs and estimated earnings in excess of billings on uncompleted contracts $ 91,180 $ 104,001 Billings on uncompleted contracts in excess of costs and estimated earnings 75,127 58,327 $ 16,053 $ 45,674 Progress billings in accounts receivable at June 30, 2017 and June 30, 2016 included retentions to be collected within one year of $54.3 million and $29.7 million , respectively. Contract retentions collectible beyond one year are included in other assets in the condensed consolidated balance sheet and totaled $1.9 million at June 30, 2017 and $0.3 million at June 30, 2016 . Accounts payable included retentions of $12.6 million at June 30, 2017 and $14.9 million at June 30, 2016 . Accounts payable retentions are generally expected to be settled within one year. Other Our results were negatively impacted by an increased cost estimate related to a large project in the Electrical Infrastructure segment, which resulted in a decrease in gross profit. The change in cost estimate resulted from a deterioration in the financial forecast of the project during the third fiscal quarter and was caused by various factors that have delayed schedule progress and reduced productivity. In July 2017, the Company reached a settlement agreement with the customer, which resolved open claims and modified the terms enabling the Company to recover all costs and overhead to perform the remainder of the work. In addition, the execution strategy was revised and a significant portion of future work will no longer be performed by the Company. The magnitude of the scope reduction is based on the Company’s best estimate at this time but may change as the detailed execution plan continues to develop. During the year ended June 30, 2015 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 $53.4 million and an after-tax reduction of $18.3 million to net income attributable to Matrix Service Company for fiscal year 2015. The Company recorded additional charges on this project during the year ended June 30, 2016. The fiscal 2016 project charges are attributable to higher than expected project closeout costs. The Company reached substantial completion on the project in the fourth quarter of fiscal 2015.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Jun. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill The changes in the carrying amount of goodwill by segment are as follows: Electrical Infrastructure Oil Gas & Chemical Storage Solutions Industrial Total (In thousands) Net balance at June 30, 2014 $ 43,243 $ 10,943 $ 10,027 $ 5,624 $ 69,837 Acquisition related adjustments 175 — — 44 219 Purchase of HDB (Note 2) — 3,065 — — 3,065 Translation adjustment (1) (1,044 ) — (363 ) (196 ) (1,603 ) Net balance at June 30, 2015 42,374 14,008 9,664 5,472 71,518 Purchase of BTE (Note 2) — — 6,942 — 6,942 Translation adjustment (1) (204 ) — 75 (38 ) (167 ) Net balance at June 30, 2016 42,170 14,008 16,681 5,434 78,293 Purchase of Houston Interests (Note 2) — 19,596 — 15,550 35,146 Acquisition related adjustments — — 88 — 88 Translation adjustment (1) (18 ) — (5 ) (3 ) (26 ) Net balance at June 30, 2017 $ 42,152 $ 33,604 $ 16,764 $ 20,981 $ 113,501 (1) The translation adjustments relate to the periodic translation of Canadian Dollar and South Korean Won denominated goodwill recorded as a part of prior acquisitions in Canada and South Korea, in which the local currency was determined to be the functional currency. We performed our annual goodwill impairment test as of May 31, 2017, which resulted in no impairment. However, the aggregate difference between the fair values of our reporting units and their carrying amounts has decreased significantly since last year as a result of current market conditions. The fair value of one reporting unit (carrying value of goodwill of $8.0 million ) only exceeded its carrying amount by 9% . The valuation model for this reporting unit incorporates the award of a significant project prior to the end of the second fiscal quarter, with project work to commence shortly thereafter. Management has concluded this award is probable of occurring. If the project is ultimately not awarded to us, the Company currently expects this would represent a triggering event requiring an interim evaluation of goodwill with respect to this reporting unit, which could result in a material impairment. In addition, for our other reporting units, if the market view of revenue opportunities or gross margin changes, the Company may need to perform an interim analysis, which could result in the recognition of a material impairment to goodwill. The Company will continue to monitor the operating results of its reporting units each period and perform additional tests as needed. Other Intangible Assets Information on the carrying value of other intangible assets is as follows: At June 30, 2017 Useful Life Gross Carrying Amount Accumulated Amortization Net Carrying Amount (Years) (In thousands) Intellectual property 9 to 15 $ 2,579 $ (1,425 ) $ 1,154 Customer based 1 to 15 38,207 (13,543 ) 24,664 Non-compete Agreements 4 to 5 1,453 (1,298 ) 155 Trade names 1 to 3 1,630 (1,307 ) 323 Total other intangible assets $ 43,869 $ (17,573 ) $ 26,296 At June 30, 2016 Useful Life Gross Carrying Amount Accumulated Amortization Net Carrying Amount (Years) (In thousands) Intellectual property 9 to 15 $ 2,579 $ (1,246 ) $ 1,333 Customer based 1.5 to 15 28,179 (9,655 ) 18,524 Non-compete agreements 4 to 5 1,453 (1,102 ) 351 Trade name 3 to 5 1,615 (824 ) 791 Total other intangible assets $ 33,826 $ (12,827 ) $ 20,999 If we are required to perform an interim goodwill analysis, and such analysis indicates impairment, the Company would need to perform an impairment analysis of relevant customer relationships and other intangible assets. With respect to the reporting unit referenced above, customer relationships with a net book value of $7.2 million as of June 30, 2017 could potentially be impaired if the reporting unit is concluded to be impaired. We will continue to monitor all intangible assets for indications of impairment and perform tests as necessary. The increase in the gross carrying amount of other intangible assets at June 30, 2017 compared to June 30, 2016 is primarily due to the December 12, 2016 acquisition of Houston Interests (See Note 2). The specifically identifiable intangible assets recognized in the Houston Interests acquisition consist of: • customer-based intangibles with a fair value of $10.0 million and useful life of between 1 and 9 years; and • trade name with a fair value of $0.2 million and useful life of 1 year. Amortization expense totaled $4.9 million , $3.6 million , and $5.0 million in fiscal 2017 , 2016 , and 2015, respectively. The Company recognized $1.6 million of amortization expense during the year ended June 30, 2017 for intangible assets recorded as part of the Houston Interests acquisition. We estimate that future amortization of other intangible assets will be as follows (in thousands): For year ending: June 30, 2018 $ 4,742 June 30, 2019 3,501 June 30, 2020 3,491 June 30, 2021 3,472 June 30, 2022 2,618 Thereafter 8,472 Total estimated amortization expense $ 26,296

Debt

Debt	12 Months Ended
	Jun. 30, 2017
Debt Disclosure [Abstract]
Debt	Debt On February 8, 2017, the Company entered into the Fourth Amended and Restated Credit Agreement (the "Credit Agreement"), by and among the Company and certain foreign subsidiaries, as Borrowers, various subsidiaries of the Company, as Guarantors, JPMorgan Chase Bank, N.A., as Administrative Agent, Sole Lead Arranger and Sole Bookrunner, and the other Lenders party thereto, which replaced the Third Amended and Restated Credit Agreement dated as of November 7, 2011, as previously amended (the "Prior Credit Agreement"). The Credit Agreement provides for a five-year senior secured revolving credit facility of $300.0 million that expires February 8, 2022 , which replaces the $250.0 million senior secured revolving credit facility under the Prior Credit Agreement. The new 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: • A Leverage Ratio, determined as of the end of each fiscal quarter, may not exceed 3.00 to 1.00 . • A Fixed Charge Coverage Ratio, determined as of the end of each fiscal quarter, greater than or equal to 1.25 to 1.00 . • Asset dispositions (other than dispositions in which all of the net cash proceeds therefrom are reinvested into the Company and dispositions of inventory and obsolete or unneeded equipment in the ordinary course of business) are limited to $20.0 million per 12-month period. The new credit facility includes a sub-facility for revolving loans denominated in Australian Dollars, Canadian Dollars, Euros and Pounds Sterling in an aggregate amount not to exceed the U.S. Dollar equivalent of $75.0 million and a $200.0 million sublimit for letters of credit. Each revolving borrowing under the Credit Agreement will bear interest at a rate per annum equal to: • The ABR or the Adjusted LIBO Rate, in the case of revolving loans denominated in U.S. Dollars; • The Canadian Prime Rate or the CDOR rate, in the case of revolving loans denominated in Canadian Dollars; • The Adjusted LIBO Rate, in the case of revolving loans denominated in Pounds Sterling or Australian Dollars; • The EURIBO Rate, in the case of revolving loans denominated in Euros, in each case, plus the Applicable Margin, which is based on the Company's Leverage Ratio. The Applicable Margin on ABR loans ranges between 0.625% and 1.625% . The Applicable Margin for Adjusted LIBO, EURIBO and CDOR loans ranges between 1.625% and 2.625% and the Applicable Margin for Canadian Prime Rate loans ranges between 2.125% and 3.125% . The unused credit facility fee is between 0.25% and 0.45% based on the Leverage Ratio. The carrying value of the senior revolving credit facility approximates its fair value at each balance sheet date. The Credit Agreement includes a Leverage Ratio covenant, which provides that Consolidated Funded Indebtedness, as of the end of any fiscal quarter, may not exceed 3.0 times Consolidated EBITDA, as defined in the Credit Agreement, over the previous four quarters. For the four quarters ended June 30, 2017 , Consolidated EBITDA was $43.6 million . Consolidated Funded Indebtedness, as defined in the Credit Agreement, at June 30, 2017 was $52.5 million . Availability under the senior revolving credit facility is as follows: June 30, June 30, (In thousands) Senior revolving credit facility $ 300,000 $ 200,000 Capacity constraint due to the Leverage Ratio 169,092 20,138 Capacity under the senior revolving credit facility 130,908 179,862 Letters of credit issued 7,825 20,755 Borrowings outstanding 44,682 — Availability under the senior revolving credit facility $ 78,401 $ 159,107 Outstanding borrowings at June 30, 2017 under our Credit Agreement were primarily used to fund the acquisition of Houston Interests (See Note 2) and working capital needs in our Canadian business due to the timing of collections and disbursements on the previously announced Electrical Infrastructure project. The Company is in compliance with all other affirmative, negative, and financial covenants under the Credit Agreement. Subsequent Event On August 31, 2017, the Company entered in to an amendment to its Credit Agreement, which provided the following: • The maximum permitted Leverage Ratio was temporarily increased to 4.00 to 1.00 for the quarters ending September 30, 2017, and December 31, 2017. The maximum Leverage Ratio will revert back to 3.00 to 1.00 beginning with the quarter ending March 31, 2018. • The Fixed Charge Coverage Ratio will not be tested for the quarters ending September 30, 2017 and December 31, 2017, but will be in effect and tested quarterly thereafter beginning with the quarter ending March 31, 2018. • A new minimum Consolidated EBITDA covenant was added solely for the four-quarter period ending December 31, 2017. For this period, the Company is required to achieve Consolidated EBITDA of $15.0 million. • The Restricted Payments covenant was amended to restrict cash dividends and share repurchases during the period beginning August 31, 2017 and ending December 31, 2017 to an aggregate basket of $5.0 million. In addition, during such period, both cash dividends and share repurchases are prohibited unless the pro forma Leverage Ratio is less than or equal to 2.50 to 1.00. Thereafter, the restriction reverts back to limiting cash dividends to 50% of net income for each fiscal year, and limiting share repurchases to $30.0 million per calendar year. • An additional increased pricing tier was added for the "Covenant Relief Period" beginning on August 31, 2017 and ending on the date we deliver our financial statements and compliance certificate for the fiscal quarter ending December 31, 2017. If our Leverage Ratio as of any quarterly calculation date during the Covenant Relief Period exceeds 3.00 to 1.00: (1) the Applicable Margin on ABR loans will be 1.875%; (2) the Applicable Margin for Adjusted LIBO, EURIBO and CDOR will be 2.875%; (3) the Applicable Margin for Canadian Prime Rate loans will be 3.375%; and (4) the unused credit facility fee will be 0.50%.

Income Taxes

Income Taxes	12 Months Ended
	Jun. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The sources of pretax income (loss) are as follows: Twelve Months Ended June 30, June 30, June 30, (In thousands) Domestic $ 19,763 $ 33,986 $ (4,001 ) Foreign (17,317 ) 5,667 12,193 Total $ 2,446 $ 39,653 $ 8,192 For fiscal 2017, 2016 and 2015, domestic pretax income included a gain of $0.3 million and losses of $3.3 million and $19.1 million , respectively, related to our acquired EPC joint venture project. The Company consolidates the acquired EPC joint venture project and reports a noncontrolling interest. Accordingly, the Company's pretax income includes the noncontrolling interest holder's share of the acquired EPC project loss for which the Company does not receive a tax benefit. The components of the provision for income tax expense (benefit) are as follows: Twelve Months Ended June 30, June 30, June 30, (In thousands) Current: Federal $ 6,522 $ 9,930 $ 7,535 State (185 ) 2,570 1,606 Foreign (1,509 ) (262 ) 1,791 4,828 12,238 10,932 Deferred: Federal 618 887 1,803 State 101 67 (362 ) Foreign (3,239 ) 924 (2,283 ) (2,520 ) 1,878 (842 ) $ 2,308 $ 14,116 $ 10,090 The difference between the expected income tax provision applying the domestic federal statutory tax rate and the reported income tax provision is as follows: Twelve Months Ended June 30, June 30, June 30, (In thousands) Expected provision for Federal income taxes at the statutory rate $ 857 $ 13,879 $ 2,868 State income taxes, net of Federal benefit 808 1,827 1,023 Deemed foreign dividends — — 1,462 Charges without tax benefit 1,741 2,187 1,478 Change in valuation allowance 1,295 311 25 Excess tax benefits on stock-based compensation (1) (496 ) — — IRC S199 deduction (749 ) (999 ) — Foreign tax credits — — (1,433 ) Research and development and other tax credits (1,626 ) (1,928 ) (1,197 ) Foreign tax differential 1,496 (815 ) (529 ) Noncontrolling interest (112 ) 1,164 6,669 Change in uncertain tax positions (22 ) (569 ) — Adjustment to tax accounts (924 ) (786 ) — Other 40 (155 ) (276 ) Provision for income taxes $ 2,308 $ 14,116 $ 10,090 (1) This represents the amount recognized for excess tax benefits upon the vesting or exercise of nonvested deferred share awards and stock options, respectively, for which the Company expects to receive an income tax deduction. Upon the adoption of ASU 2016-09, excess tax benefits and tax deficiencies are recognized as part of the provision for income taxes. See Note 1 - Summary of Significant Accounting Policies, Recently Issued Accounting Standards, ASU 2016-09, for more information about the new accounting standard. Significant components of the Company’s deferred tax assets and liabilities are as follows: June 30, June 30, (In thousands) Deferred tax assets: Warranty reserve $ 312 $ 195 Bad debt reserve 3,869 3,188 Paid-time-off accrual 821 865 Insurance reserve 2,284 2,461 Legal reserve 82 87 Net operating loss benefit and credit carryforwards 9,332 8,207 Valuation allowance (1,719 ) (424 ) Accrued compensation and pension 1,346 1,268 Stock compensation expense on nonvested deferred shares 3,731 3,472 Accrued losses 340 274 Foreign currency translation and other 1,080 1,041 Total deferred tax assets 21,478 20,634 Deferred tax liabilities: Tax over book depreciation 11,446 11,504 Tax over book amortization 3,325 2,588 Branch future liability 2,538 2,889 Prepaid insurance — 396 Receivable holdbacks and other 912 2,736 Total deferred tax liabilities 18,221 20,113 Net deferred tax asset $ 3,257 $ 521 As reported in the consolidated balance sheets: June 30, June 30, (In thousands) Deferred income tax assets 3,385 3,719 Deferred income tax liabilities (128 ) (3,198 ) Net deferred tax asset $ 3,257 $ 521 The Company has state net operating loss carryforwards, state tax credit carryforwards, federal foreign tax credit carryforwards, foreign net operating loss carryforwards and foreign tax credit carryforwards. The valuation allowance at June 30, 2017 and June 30, 2016 reduces the recognized tax benefit of these carryforwards to an amount that is more likely than not to be realized. These carryforwards will generally expire as shown below: Tax Credit Carryforwards Expiration Period Amount (in thousands) State tax credits June 2017 to June 2032 $ 498 Federal foreign tax credits June 2018 to June 2024 $ 2,348 Foreign tax credits June 2034 to June 2036 $ 612 Operating Loss Carryforwards Expiration Period Amount (in thousands) State net operating losses June 2022 to June 2037 $ 19,015 Foreign net operating losses December 2028; June 2031 to June 2036 $ 15,454 In general, it is the practice and intention of the Company to reinvest the earnings of its foreign subsidiaries in its foreign operations. Such amounts become subject to United States taxation upon the remittance of dividends and under certain other circumstances. As of June 30, 2017 , unremitted earnings of foreign subsidiaries, which have been or are intended to be permanently invested, are approximately $1.0 million . We anticipate that any deferred tax liability related to the investment in these foreign subsidiaries could be offset by foreign tax credits. The Company files tax returns in multiple domestic and foreign taxing jurisdictions. With a few exceptions, the Company is no longer subject to examination by taxing authorities through fiscal 2012. At June 30, 2017 , the Company updated its evaluation of its open tax years in all known jurisdictions. Based on this evaluation, the Company did not identify any material uncertain tax positions. We have recorded a $0.6 million liability as of June 30, 2017 for unrecognized tax positions and the payment of related interest and penalties. We treat the related interest and penalties as income tax expense. Due to the uncertainties related to these tax matters, we are unable to make a reasonably reliable estimate as to when cash settlement with a taxing authority will occur.

Contingencies

Contingencies	12 Months Ended
	Jun. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Contingencies	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 As of June 30, 2017 and June 30, 2016 , costs and estimated earnings in excess of billings on uncompleted contracts included revenues for unapproved change orders and claims of $11.0 million and $10.3 million , respectively. Generally, collection of amounts related to unapproved change orders and claims is expected within twelve months. However, customers may not pay these amounts until final resolution of related claims, and accordingly, 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.

Operating Leases

Operating Leases	12 Months Ended
	Jun. 30, 2017
Leases [Abstract]
Operating Leases	Operating Leases The Company is the lessee under operating leases covering real estate and office equipment under non-cancelable operating lease agreements that expire at various times. Future minimum lease payments under non-cancelable operating leases that were in effect at June 30, 2017 total $36.0 million and are payable as follows: fiscal 2018 — $7.5 million ; fiscal 2019 — $6.3 million ; fiscal 2020 — $5.0 million ; fiscal 2021 — $4.4 million ; fiscal 2022 — $2.6 million and thereafter— $10.1 million . Operating lease expense was $7.9 million , $6.6 million and $6.7 million for the twelve months ended June 30, 2017 , June 30, 2016 and June 30, 2015 , respectively.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Jun. 30, 2017
Stockholders' Equity Note [Abstract]
Stockholders' Equity	Stockholders’ Equity Preferred Stock The Company has 5.0 million shares of preferred stock authorized, none of which was issued or outstanding at June 30, 2017 or June 30, 2016 . Treasury Shares On December 12, 2016, the Board of Directors approved a new stock buyback program (the "December 2016 Program"), which replaced the previous program that had been in place since November 2014. Under the December 2016 Program, the Company may repurchase common stock of the Company in any calendar year commencing with calendar year 2016 and continuing through calendar year 2018, up to a maximum of $25.0 million per calendar year. The Company may repurchase its stock from time to time in the open market at prevailing market prices or in privately negotiated transactions, except during the period from August 31, 2017 until December 31, 2017, when share repurchases, along with cash dividend payments, are restricted to an aggregate basket of $5.0 million under our Credit Agreement. In addition, during this time share repurchases may only be made if the pro forma Leverage Ratio is less than or equal to 2.50 to 1.00 (see Item 8. Financial Statements and Supplementary Data, Note 5 - Debt for information about the amended Credit Agreement subsequent event). The December 2016 Program will continue through December 31, 2018 unless and until it is modified or revoked by the Board of Directors. No shares have been repurchased under the December 2016 Program as of June 30, 2017. In addition to the stock buyback program, the Company may withhold shares of common stock to satisfy the tax withholding obligations upon vesting of an employee’s deferred shares. Matrix withheld 134,535 and 205,504 shares of common stock during fiscal 2017 and 2016, respectively, to satisfy these obligations. These shares were returned to the Company’s pool of treasury shares. The Company has 1,287,655 treasury shares as of June 30, 2017 and intends to utilize these treasury shares in connection with equity awards under the Company’s stock incentive plans and for sales to the Employee Stock Purchase Plan.

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Jun. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation Total stock-based compensation expense for the years ended June 30, 2017 , June 30, 2016 , and June 30, 2015 was $7.5 million , $6.3 million and $6.3 million , respectively. Measured but unrecognized stock-based compensation expense at June 30, 2017 was $11.9 million , all of which related to nonvested deferred shares which are expected to be recognized as expense over a weighted average period of 1.8 years. The recognized tax benefit related to the stock-based compensation expense for the years ended June 30, 2017 , June 30, 2016 and June 30, 2015 totaled $0.5 million , $3.2 million and $2.5 million , respectively. Plan Information In November 2016, the Company's stockholders approved the Matrix Service Company 2016 Stock and Incentive Compensation Plan (the "2016 Plan"), which provides stock-based and cash-based incentives for officers, directors and other key employees. Stock options, restricted stock, restricted stock units, stock appreciation rights, performance shares and cash-based awards can be issued under this plan. Upon approval of the 2016 Plan, the 2012 Stock and Incentive Compensation Plan ("2012 Plan") was frozen with the exception of normal vesting and other activity associated with awards previously granted under the 2012 Plan. However, shares awarded under the 2012 Plan that are subsequently forfeited or net settled for tax withholding purposes are returned to the treasury share pool and become available for grant under the 2016 Plan. The 2012 Plan was preceded by the 2004 Stock Incentive Plan ("2004 Plan"), which was frozen upon approval of the 2012 Plan with the exception of normal vesting, forfeiture and other activity associated with awards previously granted under the 2004 Plan. Awards totaling 1,800,000 shares have been authorized under the 2016 Plan. At June 30, 2017 there were 1,716,934 shares available for grant under the 2016 Plan. Stock Options Stock options are granted at the market value of the Company’s common stock on the grant date and expire after 10 years. The Company’s policy is to issue shares upon the exercise of stock options from its treasury shares, if available. The Company did not award any new stock options in fiscal years 2017, 2016, or 2015. Stock option activity and related information for the year ended June 30, 2017 is as follows: Number of Options Weighted-Average Remaining Contractual Life Weighted-Average Exercise Price Aggregate Intrinsic Value (Years) (In thousands) Outstanding at June 30, 2016 122,063 5.3 $ 10.19 $ 769 Granted — — Exercised (24,813 ) $ 10.19 $ 268 Canceled — — Outstanding at June 30, 2017 97,250 P5Y3M $ 10.19 $ — Vested at June 30, 2017 97,250 P5Y3M $ 10.19 $ — Exercisable at June 30, 2017 97,250 P5Y3M $ 10.19 $ — The total intrinsic value of stock options exercised during fiscal 2017 , 2016 , and 2015 was $0.3 million , $0.7 million and $0.7 million , respectively. Nonvested Deferred Shares The Company has issued nonvested deferred shares under the following types of arrangements: • Time-based awards—Employee awards generally vest in four equal annual installments beginning one year after the grant date. Director awards prior to 2016 cliff vest on the earlier of three years or upon retirement from the Board. Director awards beginning in 2016 vest one year after the grant date. • Market-based awards—These awards are in the form of performance units which vest 3 years after the grant date only if the Company’s common stock achieves certain levels of total shareholder return when compared to the total shareholder return of a peer group of companies as selected by the Compensation Committee of the Board of Directors. The payout can range from zero to 200% of the original award depending on the Company's relative total shareholder return during the performance period. These awards are settled in stock. As of June 30, 2017 , there are approximately 127,000 , and 183,000 performance units that are scheduled to vest in fiscal 2019 , and fiscal 2020 , respectively. There were approximately 80,000 performance units that were scheduled to vest in fiscal 2018, but total shareholder return during the performance period did not meet the threshold performance and the performance units were forfeited. All awards vest upon the death or disability of the participant or upon a change of control of the Company. The grant date fair value of the time-based awards is determined by the market value of the Company's common stock on the grant date. The grant date fair value of the market-based awards is calculated using a Monte Carlo model . For the fiscal 2017 grant, the model estimated the fair value of the award based on approximately 100,000 simulations of the future prices of the Company's common stock compared to the future prices of the common stock of its peer companies based on historical volatilities. The model also took into account the expected dividends of the peer companies over the performance period. Nonvested deferred share activity for the twelve months ended June 30, 2017 is as follows: Shares Weighted Average Grant Date Fair Value per Share Nonvested shares at June 30, 2016 791,995 $ 21.45 Shares granted 516,969 $ 19.80 Performance shares earned in excess of target 88,523 $ 18.90 Shares vested and released (396,530 ) $ 18.24 Shares canceled (5,604 ) $ 19.70 Nonvested shares at June 30, 2017 995,353 $ 21.65 There were 370,490 and 242,649 deferred shares granted in fiscal 2016 and 2015 with average grant date fair values of $20.77 and $29.31 , respectively. There were 396,530 , 631,443 and 326,763 deferred shares that vested and were released in fiscal 2017, 2016 and 2015 with weighted average fair values of $18.24 , $22.34 and $23.93 per share, respectively.

Earnings per Common Share

Earnings per Common Share	12 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
Earnings per Common Share	Earnings per Common Share Basic earnings per share (“EPS”) is calculated based on the weighted average shares outstanding during the period. Diluted earnings per share includes the dilutive effect of employee and director stock options and nonvested deferred shares. Stock options are considered dilutive whenever the exercise price is less than the average market price of the stock during the period and antidilutive whenever the exercise price exceeds the average market price of the common stock during the period. Nonvested deferred shares are considered dilutive (antidilutive) whenever the average market value of the shares during the period exceeds (is less than) the sum of the related average unamortized compensation expense during the period plus the related hypothetical estimated excess tax benefit that will be realized when the shares vest. Stock options and nonvested deferred shares are considered antidilutive in the event we report a net loss. The computation of basic and diluted EPS is as follows: Years Ended June 30, June 30, June 30, (In thousands, except per share data) Basic EPS: Net income (loss) attributable to Matrix Service Company $ (183 ) $ 28,863 $ 17,157 Weighted average shares outstanding 26,533 26,597 26,603 Basic earnings (loss) per share $ (0.01 ) $ 1.09 $ 0.64 Diluted EPS: Weighted average shares outstanding—basic 26,533 26,597 26,603 Dilutive stock options — 68 110 Dilutive nonvested deferred shares — 435 464 Diluted weighted average shares 26,533 27,100 27,177 Diluted earnings (loss) per share $ (0.01 ) $ 1.07 $ 0.63 The following securities are considered antidilutive and have been excluded from the calculation of diluted earnings (loss) per share: Twelve Months Ended June 30, June 30, June 30, (In thousands) Stock options 43 — — Nonvested deferred shares 430 56 148 Total antidilutive securities 473 56 148

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Jun. 30, 2017
Compensation and Retirement Disclosure [Abstract]
Employee Benefit Plans	Employee Benefit Plans Defined Contribution Plans The Company sponsors defined contribution savings plans for all eligible employees meeting length of service requirements. Under the primary plan, participants may contribute an amount up to 25% of pretax annual compensation subject to certain limitations. The Company matches 100% of the first 3% of employee contributions and 50% of the next 2% of employee contributions. The Company matching contributions vest immediately. The Company’s matching contributions were $5.5 million , $5.0 million , and $4.9 million for the years ended June 30, 2017, 2016 and 2015, respectively. Multiemployer Pension Plans The Company contributes to various union sponsored multiemployer benefit plans in the U.S. and Canada. Benefits under these plans are generally based on compensation levels and years of service. For the Company, the financial risks of participating in multiemployer plans are different from single-employer plans in the following respects: • Assets contributed to the multiemployer plan by one employer may be used to provide benefits to employees of other participating employers. • If a participating employer discontinues contributions to a plan, the unfunded obligations of the plan may be borne by the remaining participating employers. • If a participating employer chooses to stop participating in a plan, a withdrawal liability may be created based on the unfunded vested benefits for all employees in the plan. Under federal legislation regarding multiemployer pension plans, in the event of a withdrawal from a plan or plan termination, companies are required to continue funding their proportionate share of such plan’s unfunded vested benefits. We are a participant in multiple union sponsored multiemployer plans, and, as a plan participant, our potential obligation could be significant. The amount of the potential obligation is not currently ascertainable because the information required to determine such amount is not identifiable or readily available. Our participation in significant plans for the fiscal year ended June 30, 2017 is outlined in the table below. The “EIN/Pension Plan Number” column provides the Employer Identification Number (“EIN”) and the three digit plan number. The zone status is based on the latest information that the Company received from the plan and is certified by the plan’s actuary. Plans in the red zone are generally less than 65 percent funded, plans in the yellow zone are generally less than 80 percent funded, and plans in the green zone are generally at least 80 percent funded. The “FIP/RP Status Pending/Implemented” column indicates plans for which a financial improvement plan (“FIP”) or a rehabilitation plan (“RP”) is either pending or has been implemented. The “Surcharge Imposed” column includes plans in a red zone status that require a payment of a surcharge in excess of regular contributions. The last column lists the expiration date of the collective-bargaining agreement to which the plan is subject. Pension Fund EIN/Pension Plan Number Pension Protection Act Zone Status FIP/RP Status Pending or Implemented Company Contributions Fiscal Year Surcharge Imposed Expiration Date of Collective- Bargaining Agreement 2017 2016 2017 2016 2015 (In thousands) Boilermaker-Blacksmith National Pension Trust 48-6168020/001 Described below (2) Described below (2) Described below (2) $ 7,098 $ 7,658 $ 8,330 Described below (2) Described below (1) Joint Pension Fund Local Union 164 IBEW 22-6031199/001 Described below (2) Described below (2) Described below (2) 2,709 2,635 3,026 Described below (2) 5/31/2021 Joint Pension Fund of Local Union No 102 22-1615726/001 Green Green N/A 2,392 3,063 2,395 No 5/31/2019 IBEW Local 456 Pension Plan 22-6238995/001 Green Green N/A 2,777 1,168 788 No 12/3/2017 Local 351 IBEW Pension Plan 22-3417366/001 Green Green N/A 2,796 5,018 2,608 No 9/30/2017 Steamfitters Local Union No 420 Pension Plan 23-2004424/001 Red Red Yes 2,234 1,265 937 Yes 4/30/2020 IBEW Local Union 98 Pension Plan 23-1990722/001 Described below (2) Described below (2) Described below (2) 1,519 1,653 2,768 Described below (2) 4/28/2018 Indiana Laborers Pension Fund 35-6027150/001 Described below (2) Described below (2) Described below (2) 2,458 2,320 2,519 Described below (2) 5/31/2018 Iron Workers Mid-America Pension Plan 36-6488227/001 Green Green N/A 1,785 2,248 2,605 No 5/31/2019 Plumbers & Pipefitters Local Union 74 Pension Fund 51-6015925/001 Yellow Yellow Yes 4 552 4,473 No 6/15/2018 Pipe Fitters Retirement Fund, Local 597 62-6105084/001 Green Green N/A 2,563 2,377 2,259 No 5/31/2018 Contributions to other multiemployer plans 20,374 16,054 22,282 Total contributions made $ 48,709 $ 46,011 $ 54,990 (1) Our employees are members of several Boilermaker unions that participate in the Boilermaker-Blacksmith National Pension Trust. The most significant of these unions are Boilermakers Local 374 and Boilermakers Local 128, which have collective bargaining agreements that expire on December 31, 2019 and December 31, 2020, respectively. (2) For the Boilermaker-Blacksmith National Pension Trust, Local 164 IBEW Pension Plan, Local 98 IBEW Pension Plan and the Indiana Laborers Pension Fund, the Company has not received a funding notification that covers the Company's fiscal years 2017 or 2016 during the preparation of this Form 10-K. Under Federal pension law, if a multiemployer pension plan is determined to be in critical or endangered status, the plan must provide notice of this status to participants, beneficiaries, the bargaining parties, the Pension Benefit Guaranty Corporation, and the Department of Labor. The Company also observed that these plans have not submitted any Critical or Endangered Status Notices to the Department of Labor for either calendar years 2017 or 2016 (which can be accessed at http://www.dol.gov/ebsa/criticalstatusnotices.html). Employee Stock Purchase Plan The Matrix Service Company 2011 Employee Stock Purchase Plan (“ESPP”) was effective January 1, 2011. The ESPP allows employees to purchase shares through payroll deductions and members of the Board of Directors to purchase shares from amounts withheld from their cash retainers. Share purchases are limited to an aggregate market value of no greater than $60,000 per calendar year per participant and are purchased at market value with no discount to the participant. Contributions are with after tax earnings and are accumulated in non-interest bearing accounts for quarterly purchases of company stock. Upon the purchase of shares, the participants receive all stockholder rights including dividend and voting rights, and are permitted to sell their shares at any time. The Company has made 1,000,000 shares available under the ESPP. The ESPP can be terminated at the discretion of the Board of Directors or on January 2, 2021 . Shares are issued from Treasury Stock under the ESPP. There were 16,609 shares issued in fiscal 2017, 17,304 shares in fiscal 2016, and 13,243 shares in fiscal 2015.

Segment Information

Segment Information	12 Months Ended
	Jun. 30, 2017
Segment Reporting [Abstract]
Segment Information	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 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. We also provide 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. The Oil Gas & Chemical segment includes turnaround activities, plant maintenance, engineering and construction in the downstream and midstream petroleum industries. Our customers in these industries are engaged in refining crude oil and processing, fractionating, and marketing of natural gas and natural gas liquids. Another key offering is industrial cleaning services, which include hydroblasting, hydroexcavating, chemical cleaning and vacuum services. We also perform work in the petrochemical, upstream petroleum, and sulfur extraction, recovery and processing 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 geodesic domes, aluminum internal floating roofs, floating suction and skimmer systems, roof drain systems and floating roof seals. The Industrial segment primarily includes construction and maintenance work in the iron and steel, mining and minerals, and agricultural industries. Our work in the mining and minerals industry is primarily for customers engaged in the extraction of copper. Our work in the agricultural industry includes the engineering and design of grain silos, docks and handling systems; the design of control system automation and materials handling for the food industry; and engineering, construction, process design and balance of plant work for fertilizer production facilities. We also perform work in bulk material handling, thermal vacuum chambers, and 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. 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 and goodwill. Results of Operations (In thousands) Electrical Infrastructure Oil Gas & Chemical Storage Solutions Industrial Unallocated Corporate Total Twelve months ended June 30, 2017 Gross revenues $ 373,384 $ 247,423 $ 483,254 $ 103,449 $ — $ 1,207,510 Less: inter-segment revenues — 6,900 1,558 1,543 — 10,001 Consolidated revenues 373,384 240,523 481,696 101,906 — 1,197,509 Gross profit 7,137 12,675 55,651 5,540 — 81,003 Operating income (loss) (8,309 ) (8,783 ) 22,928 (977 ) — 4,859 Segment assets 183,351 129,177 166,742 53,754 53,006 586,030 Capital expenditures 1,390 829 2,017 38 7,634 11,908 Depreciation and amortization expense 5,198 6,299 7,277 2,828 — 21,602 Twelve months ended June 30, 2016 Gross revenues $ 349,011 $ 252,973 $ 564,738 $ 149,744 $ — $ 1,316,466 Less: inter-segment revenues — 3,178 1,226 145 — 4,549 Consolidated revenues 349,011 249,795 563,512 149,599 — 1,311,917 Gross profit 29,301 18,553 67,843 10,294 — 125,991 Operating income (loss) 11,144 (3,503 ) 33,449 (208 ) — 40,882 Segment assets 135,298 91,350 201,875 67,569 68,875 564,967 Capital expenditures 1,611 1,481 3,882 104 6,861 13,939 Depreciation and amortization expense 5,008 4,811 8,124 3,498 — 21,441 Twelve months ended June 30, 2015 Gross revenues $ 257,930 $ 310,826 $ 504,155 $ 281,319 $ — $ 1,354,230 Less: inter-segment revenues — 5,466 1,032 4,597 — 11,095 Consolidated revenues 257,930 305,360 503,123 276,722 — 1,343,135 Gross profit (loss) (31,444 ) 25,394 58,085 35,335 — 87,370 Operating income (loss) (44,293 ) 7,064 29,069 16,962 — 8,802 Segment assets 129,725 108,960 172,857 102,761 47,386 561,689 Capital expenditures 579 3,858 2,396 1,139 7,801 15,773 Depreciation and amortization expense 4,915 4,772 7,298 6,495 — 23,480 Geographical information is as follows: Revenues Twelve Months Ended June 30, June 30, June 30, (In thousands) United States $ 961,049 $ 1,127,893 $ 1,205,713 Canada 228,625 178,603 137,422 Other international 7,835 5,421 — $ 1,197,509 $ 1,311,917 $ 1,343,135 Long-Lived Assets June 30, June 30, June 30, (In thousands) United States $ 193,164 $ 158,970 $ 166,132 Canada 21,419 19,915 22,086 Other international 12,817 10,636 — $ 227,400 $ 189,521 $ 188,218 Information about Significant Customers Significant Customers as a Percentage of Segment Revenues Consolidated Electrical Infrastructure Oil Gas & Chemical Storage Solutions Industrial Twelve months ended June 30, 2017 Customer one 19.5 % — % — % 48.5 % — % Customer two 15.3 % 46.0 % — % 2.4 % — % Customer three 5.2 % — % 25.8 % — % — % Customer four 4.2 % — % 20.7 % — % — % Customer five 4.0 % 12.7 % — % — % — % Customer six 2.7 % — % — % — % 31.7 % Customer seven 2.2 % — % — % — % 25.8 % Twelve months ended June 30, 2016 Customer one 14.8 % 38.9 % — % 10.2 % — % Customer two 10.6 % — % — % 24.7 % — % Customer three 8.3 % — % — % 19.3 % — % Customer four 4.4 % 16.6 % — % — % — % Customer five 4.2 % — % — % — % 36.9 % Customer six 3.9 % — % 20.2 % — % — % Customer seven 3.8 % 14.4 % — % — % — % Customer eight 3.4 % 12.7 % — % — % — % Customer nine 2.3 % — % — % — % 20.1 % Customer ten 2.1 % — % 11.2 % — % — % Customer eleven 1.6 % — % — % — % 14.0 % Twelve months ended June 30, 2015 Customer one 12.3 % — % — % 33.0 % — % Customer two 7.0 % — % — % — % 34.0 % Customer three 6.5 % 12.7 % — % 10.9 % — % Customer four 5.7 % — % — % — % 27.6 % Customer five 4.8 % 25.1 % — % — % — % Customer six 4.0 % — % 17.7 % — % — % Customer seven 3.9 % — % — % — % 19.0 % Customer eight 3.1 % 16.3 % — % — % — % Customer nine 2.8 % 14.7 % — % — % — % Customer ten 2.8 % — % 12.3 % — % — % Customer eleven 2.4 % 12.7 % — % — % — %

Quarterly Financial Data (Unaud

Quarterly Financial Data (Unaudited) Quarterly Financial Data (Unaudited)	12 Months Ended
	Jun. 30, 2017
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Data (Unaudited)	Matrix Service Company Quarterly Financial Data (Unaudited) Fiscal Years Ended June 30, 2017 and June 30, 2016 First Quarter Second Quarter Third Quarter Fourth Quarter (In thousands, except per share amounts) Fiscal Year 2017 Revenues $ 341,781 $ 312,655 $ 251,237 $ 291,836 Gross profit (loss) 32,278 28,212 (2,614 ) 23,127 Operating income (loss) 14,301 8,237 (21,210 ) 3,531 Net income (loss) attributable to Matrix Service Company 9,342 5,250 (13,821 ) (954 ) Earnings (loss) per common share: Basic 0.35 0.20 (0.52 ) (0.04 ) Diluted 0.35 0.20 (0.52 ) (0.04 ) Fiscal Year 2016 Revenues $ 319,331 $ 323,529 $ 309,422 $ 359,635 Gross profit 34,584 30,005 27,303 34,099 Operating income 15,101 4,935 6,347 14,499 Net income attributable to Matrix Service Company 9,941 5,431 4,357 9,134 Earnings per common share: Basic 0.38 0.20 0.16 0.35 Diluted 0.37 0.20 0.16 0.34 The sum of earnings per share for the four quarters may not equal the total earnings per share for the year due to changes in the average number of common shares outstanding and rounding.

Valuation and Qualifying Accoun

Valuation and Qualifying Accounts	12 Months Ended
	Jun. 30, 2017
Valuation and Qualifying Accounts [Abstract]
Valuation and Qualifying Accounts	Matrix Service Company Schedule II—Valuation and Qualifying Accounts June 30, 2017 , June 30, 2016 , and June 30, 2015 (In thousands) COL. A COL. B COL. C ADDITIONS COL. D COL. E Balance at Beginning of Period Charged to Costs and Expenses Charged to Other Accounts—Describe Deductions—Describe Balance at End of Period Fiscal Year 2017 Deducted from asset accounts: Allowance for doubtful accounts $ 8,403 $ 1,748 $ — $ (264 ) (A) $ 9,887 Valuation reserve for deferred tax assets 424 1,295 — — 1,719 Total $ 8,827 $ 3,043 $ — $ (264 ) $ 11,606 Fiscal Year 2016 Deducted from asset accounts: Allowance for doubtful accounts $ 561 $ 6,065 $ 1,808 (B) $ (31 ) (C) $ 8,403 Valuation reserve for deferred tax assets 115 311 — (2 ) 424 Total $ 676 $ 6,376 $ 1,808 $ (33 ) $ 8,827 Fiscal Year 2015 Deducted from asset accounts: Allowance for doubtful accounts $ 204 $ 422 $ — $ (65 ) (C) $ 561 Valuation reserve for deferred tax assets 90 25 — — 115 Total $ 294 $ 447 $ — $ (65 ) $ 676 (A) Relates to a $180 receivable written off against allowance for doubtful accounts, a $60 reclassification of reserves to billings on uncompleted contracts in excess of costs and estimated earnings and a $24 currency translation adjustment. (B) Relates to a reclassification of reserves that were initially recorded in billings on uncompleted contracts in excess of costs and estimated earnings. (C) Receivables written off against allowance for doubtful accounts.

Summary of Significant Accoun25

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Jun. 30, 2017
Accounting Policies [Abstract]
Organization and Basis of Presentation	Organization and Basis of Presentation The consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States and include the accounts of Matrix Service Company (“Matrix” or the “Company”) and its subsidiaries, all of which are wholly owned. Intercompany transactions and balances have been eliminated in consolidation. The Company operates in the United States, Canada, South Korea, Australia and Colombia. The Company’s reportable segments are Electrical Infrastructure, Oil Gas & Chemical, Storage Solutions and Industrial.
Use of Estimates	Use of Estimates The preparation of financial statements requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. We believe the most significant estimates and judgments are associated with revenue recognition, the recoverability tests that must be periodically performed with respect to our goodwill and other intangible assets, valuation reserves on our accounts receivable and deferred tax assets, and the estimation of loss contingencies, including liabilities associated with litigation and with the self-insured retentions on our insurance programs. Actual results could materially differ from those estimates.
Revenue Recognition	Revenue Recognition Matrix records revenue on fixed-price contracts on a percentage-of-completion basis, primarily based on costs incurred to date compared to the total estimated contract cost. The Company records revenue on reimbursable and time and material contracts on a proportional performance basis as costs are incurred. Contracts in process are valued at cost plus accrued profits less billings on uncompleted contracts. Contracts are generally considered substantially complete when field construction is completed. The elapsed time from award of a contract to completion of performance may be in excess of one year. Matrix includes pass-through revenue and costs on cost-plus contracts, which are customer-reimbursable materials, equipment and subcontractor costs, when Matrix determines that it is responsible for the procurement and management of such cost components. Matrix has numerous contracts that are in various stages of completion which require estimates to determine the appropriate cost and revenue recognition. The Company has a history of making reasonably dependable estimates of the extent of progress towards completion, contract revenues and contract costs, and accordingly, does not believe significant fluctuations are likely to materialize. However, current estimates may be revised as additional information becomes available. If estimates of costs to complete fixed-price contracts indicate a loss, provision is made through a contract write-down for the total loss anticipated. A number of our contracts contain various cost and performance incentives and penalties that impact the earnings we realize from our contracts, and adjustments related to these incentives and penalties are recorded in the period, on a percentage-of-completion basis, when estimable and probable. Indirect costs, such as salaries and benefits, supplies and tools, equipment costs and insurance costs, are charged to projects based upon direct labor hours and overhead allocation rates per direct labor hour. Warranty costs are normally incurred prior to project completion and are charged to project costs as they are incurred. Warranty costs incurred subsequent to project completion were not material for the periods presented. Overhead allocation rates are established annually during the budgeting process.
Precontract Costs	Precontract Costs Precontract costs are costs incurred in anticipation of obtaining a contract that will result in no future benefit unless the contract is obtained. The Company generally expenses precontract costs to cost of revenue as incurred, but, in certain cases their recognition may be deferred if specific criteria are met. We had no deferred precontract costs at June 30, 2017 or 2016.
Change Orders and Claims Recognition	Change Orders and Claims Recognition Change orders are modifications of an original contract that effectively change the existing provisions of the contract. Change orders may include changes in specifications or designs, manner of performance, facilities, equipment, materials, sites and period of completion of the work. Matrix or our clients may initiate change orders. The client's agreement to the terms of change orders is, in many cases, reached prior to work commencing; however, sometimes circumstances require that work progress prior to obtaining client agreement. Costs related to change orders are recognized as incurred. Revenues attributable to change orders that are unapproved as to price or scope are recognized to the extent that costs have been incurred if the amounts can be reliably estimated and their realization is probable. Revenues in excess of the costs attributable to change orders that are unapproved as to price or scope are recognized only when realization is assured beyond a reasonable doubt. Change orders that are unapproved as to both price and scope are evaluated as claims. Claims are amounts in excess of the agreed contract price that we seek to collect from customers or others for delays, errors in specifications and designs, contract terminations, change orders in dispute or unapproved as to both scope and price or other causes of anticipated additional costs incurred by us. Recognition of amounts as additional contract revenue related to claims is appropriate only if it is probable that the claims will result in additional contract revenue and if the amount can be reliably estimated. We must determine if: • there is a legal basis for the claim; • the additional costs were caused by circumstances that were unforeseen by the Company and are not the result of deficiencies in our performance; • the costs are identifiable or determinable and are reasonable in view of the work performed; and • the evidence supporting the claim is objective and verifiable. If all of these requirements are met, revenue from a claim is recorded only to the extent that we have incurred costs relating to the claim. Unapproved change orders and claims are more fully discussed in Note 7—Contingencies.
Cash Equivalents	Cash and Cash Equivalents The Company includes as cash equivalents all investments with original maturities of three months or less which are readily convertible into cash. The Company had approximately $0.3 million of restricted cash related to a customer deposit at June 30, 2017 and 2016. We have cash on deposit at June 30, 2017 with banks in the United States, Canada, South Korea, Australia and Colombia in excess of Federal Deposit Insurance Corporation ("FDIC"), Canada Deposit Insurance Corporation ("CDIC"), Korea Deposit Insurance Corporation ("KDIC"), Financial Claims Scheme ("FCS") and Fondo de Garantias de Instituciones Financieras protection limits, respectively.
Accounts Receivable	Accounts Receivable Accounts receivable are carried on a gross basis, less the allowance for uncollectible accounts. The Company’s customers consist primarily of major integrated oil companies, steel companies, independent refiners and marketers, power companies, petrochemical companies, pipeline companies, mining companies, contractors and engineering firms. The Company is exposed to the risk of individual customer defaults or depressed cycles in our customers’ industries. To mitigate this risk many of our contracts require payment as projects progress or advance payment in some circumstances. In addition, in most cases the Company can place liens against the property, plant or equipment constructed or terminate the contract if a material contract default occurs. Management estimates the allowance for uncollectible accounts based on existing economic conditions, the financial condition of its customers and the amount and age of past due accounts. Accounts are written off against the allowance for uncollectible accounts only after all collection attempts have been exhausted.
Retentions	Retentions Contract retentions collectible beyond one year are included in Other Assets in the Consolidated Balance Sheets. Accounts payable retentions are generally settled within one year.
Loss Contingencies	Loss Contingencies Various legal actions, claims and other contingencies arise in the normal course of our business. Contingencies are recorded in the consolidated financial statements, or are otherwise disclosed, in accordance with ASC 450-20, “Loss Contingencies”. Specific reserves are provided for loss contingencies to the extent we conclude that a loss is both probable and estimable. We use a case-by-case evaluation of the underlying data and update our evaluation as further information becomes known. We believe that any amounts exceeding our recorded accruals should not materially affect our financial position, results of operations or liquidity. However, the results of litigation are inherently unpredictable and the possibility exists that the ultimate resolution of one or more of these matters could result in a material effect on our financial position, results of operations or liquidity. Legal costs are expensed as incurred.
Inventories	Inventories Inventories consist primarily of steel plate and pipe and aluminum coil and extrusions. Cost is determined primarily using the average cost method and inventories are stated at the lower of cost or net realizable value.
Depreciation	Depreciation Depreciation is computed using the straight-line method over the estimated useful lives of the depreciable assets. Depreciable lives are as follows: buildings— 40 years, construction equipment— 3 to 15 years, transportation equipment— 3 to 5 years, and office equipment and software— 3 to 10 years. Leasehold improvements are amortized over the shorter of the useful life of the asset or the lease term.
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets The Company evaluates long-lived assets for impairment when events or changes in circumstances indicate, in management’s judgment, that the carrying value of such assets used in operations may not be recoverable. The determination of whether an impairment has occurred is based on management’s estimate of undiscounted future cash flows attributable to the assets as compared to the carrying value of the assets. If an impairment has occurred, the amount of the impairment recognized is determined by estimating the fair value of the assets and, to the extent the carrying value exceeds the fair value of the assets, recording a loss provision. For assets identified to be disposed of in the future, the carrying value of the assets are compared to the estimated fair value less the cost of disposal to determine if an impairment has occurred. Until the assets are disposed of, an estimate of the fair value is redetermined when related events or circumstances change.
Goodwill	Goodwill Goodwill represents the excess of the purchase price of acquisitions over the acquisition date fair value of the net identifiable tangible and intangible assets acquired. In accordance with current accounting guidance, goodwill is not amortized and is tested at least annually for impairment at the reporting unit level, which is a level below our reportable segments. We perform our annual test during the fourth quarter of each fiscal year and in any other period in which indicators of impairment warrant additional tests. The goodwill impairment test involves comparing management’s estimate of the fair value of a reporting unit with its carrying value, including goodwill. If the fair value of a reporting unit exceeds its carrying value, then goodwill is not impaired. If the fair value of a reporting unit is less than its carrying value, then goodwill is impaired to the extent of the difference, but the impairment may not exceed the balance of goodwill assigned to that reporting unit. Management utilizes a discounted cash flow analysis, referred to as an income approach, to determine the estimated fair value of our reporting units. Significant judgments and assumptions including the discount rate, anticipated revenue growth rate, gross margins, operating expenses, working capital needs and capital expenditures are inherent in these fair value estimates, which are based on our operating and capital budgets and on our strategic plan. As a result, actual results may differ from the estimates utilized in our income approach. The use of alternate judgments and/or assumptions could result in a fair value that differs from our estimate and could result in the recognition of an impairment charge in the financial statements. As a result of these uncertainties, we utilize multiple scenarios and assign probabilities to each of the scenarios in the income approach. We also consider the combined carrying values of our reporting units to our market capitalization.
Other Intangible Assets	Other Intangible Assets Intangible assets that have finite useful lives are amortized by the straight-line method over their useful lives ranging from 1 year to 15 years. A finite intangible asset is considered impaired when its carrying amount is not recoverable and exceeds the asset's fair value. The carrying amount is deemed unrecoverable if it is greater than the sum of undiscounted cash flows expected to result from use and eventual disposition of the asset. An impairment loss is equal to the excess of the carrying amount over the fair value of the asset. If quoted market prices are not available, the fair values of the intangible assets are based on present values of expected future cash flows or royalties avoided using discount rates commensurate with the risks involved.
Insurance Reserves	Insurance Reserves We maintain insurance coverage for various aspects of our operations. However, we retain exposure to potential losses through the use of deductibles, coverage limits and self-insured retentions. We establish reserves for claims using a combination of actuarially determined estimates and case-by-case evaluations of the underlying claim data and update our evaluations as further information becomes known. Judgments and assumptions are inherent in our reserve accruals; as a result, changes in assumptions or claims experience could result in changes to these estimates in the future. If actual results of claim settlements are different than the amounts estimated we may be exposed to future gains and losses that could be material.
Stock-Based Compensation	Stock-Based Compensation The Company has issued stock options and nonvested deferred share awards under its long-term incentive compensation plans. The fair value of these awards is calculated at grant date. The fair value of time-based, nonvested deferred shares is the value of the Company’s common stock at the grant date. The fair value of market-based nonvested deferred shares is based on several factors, including the probability that the market condition specified in the grant will be achieved. The fair value of stock options is determined based on the Black-Scholes option pricing model. For all stock-based awards, expense is recognized over the requisite service period with forfeitures recorded as they occur.
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, with the help of professional tax advisors. Therefore, we estimate and provide for amounts of additional income taxes that may be assessed by the various taxing authorities.
Foreign Currency	Foreign Currency The functional currencies of the Company’s operations in Canada, South Korea, Australia and Colombia are the Canadian Dollar, South Korean Won, U.S. Dollar and Colombian Peso, respectively. For subsidiaries with operations using a foreign functional currency, assets and liabilities are translated at the year end exchange rates and the income statement accounts are translated at average exchange rates throughout the year. Translation gains and losses are reported in Accumulated Other Comprehensive Income (Loss) in the Consolidated Statements of Changes in Stockholders’ Equity and in Other Comprehensive Income (Loss) in the Consolidated Statements of Comprehensive Income. Transaction gains and losses are reported as a component of Other income (expense) in the Consolidated Statements of Income.
Recently Issued Accounting Standards	Recently Issued Accounting Standards Accounting Standards Update 2014-09, Revenue from Contracts with Customers (Topic 606) 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"). The ASU is effective for annual reporting periods beginning after December 15, 2017, including interim reporting periods within that reporting period. Early adoption is permitted on a limited basis. Management is currently evaluating the impact of adopting the ASU on the Company's financial position, results of operations, cash flows and related disclosures. Adoption of this ASU is expected to affect the manner in which the Company determines the unit of account for its projects (i.e., performance obligations). Under existing guidance, the Company may have multiple performance obligations for large, complex projects. Upon adoption, the Company expects that similar projects may have fewer performance obligations, possibly just one in some cases, which will result in a more constant recognition of revenue and profit over the term of the project. The Company will adopt this standard on July 1, 2018 using the modified retrospective method of application, which may result in a cumulative effect adjustment to retained earnings as of the date of adoption. Management has completed its review of the new revenue standard and is currently developing a plan to review its contracts in order to confirm its understanding of how the new standard will impact its revenue recognition policy, disclosures, processes and internal controls. At this time, we cannot reliably estimate the amount of any potential retrospective adjustment. Accounting Standards Update 2014-15, Presentation of Financial Statements—Going Concern (Subtopic 205-40): 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 ASU was adopted during the Company's first fiscal quarter ending September 30, 2016. In connection with the adoption of the ASU, the Company now performs an assessment of its ability to continue as a going concern on a quarterly basis. Disclosure regarding the status of the Company's ability to continue as a going concern is required when there are conditions or events that raise substantial doubt about its ability to continue as a going concern within one year after the date that the financial statements are issued. 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. We adopted this standard on July 1, 2016 with no material impact to the Company's financial statements. Accounting Standards Update 2016-02, Leases (Topic 842) On February 25, 2016, the FASB issued ASU 2016-02. The amendments in this update require, among other things, that lessees recognize the following for all leases (with the exception of short-term leases) at the commencement date: (1) a lease liability, which is a lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis; and (2) a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. Lessees and lessors must apply a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The ASU is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted, but we do not plan to do so at this time. We are currently evaluating the ASU's expected impact on our financial statements. See Note 8 - Operating Leases for more information about the timing and amount of future operating lease payments, which we believe is indicative of the materiality of adoption of the ASU to our financial statements. Accounting Standards Update 2016-09, Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting On March 30, 2016, the FASB issued ASU 2016-09, which simplified several aspects of accounting for stock-based compensation transactions, including the accounting for income taxes and forfeitures and statutory tax withholding requirements. The Company adopted the ASU during its first fiscal quarter ending September 30, 2016. The following is a description of the key provisions of the ASU and their impacts to the Company's financial statements: Accounting for Income Taxes : The amendments require the Company to recognize excess tax benefits or tax deficiencies in its provision for income taxes in its consolidated statements of income during the period of vesting or exercise of its nonvested deferred share awards and stock options, respectively, for which it expects to receive an income tax deduction. Previously, the Company recognized any excess tax benefits in additional paid-in capital ("APIC") in the balance sheet and any tax deficiencies were recognized as a reduction of APIC to the extent the Company has accumulated excess tax benefits. Any tax deficiencies in excess of accumulated excess tax benefits in APIC were recognized in the provision for income taxes. The amendments also require the Company to only present excess tax benefits and tax deficiencies in the operating section of its statements of cash flows as a component of deferred tax activity. Previously, the Company was required to present such items in both the financing section and operating section of its statements of cash flows. Amendments related to the recognition of excess tax benefits and tax deficiencies in income are required to be applied prospectively, and amendments related to the cash flow statement presentation of excess tax benefits and tax deficiencies may be applied either retrospectively or prospectively. The Company applied the amendments requiring the recognition of excess tax benefits and tax deficiencies in income prospectively. As a result, the Company recognized $0.5 million of excess tax benefits in its provision for income taxes during the year ended June 30, 2017, which increased basic and diluted earnings per share by $0.02 . Under the prior accounting standard, the Company would have recognized the excess tax benefits in equity as APIC. The amendments relating to the presentation of excess tax benefits and tax deficiencies in the statement of cash flows were applied retrospectively. The effect of the retrospective adjustment was to eliminate the presentation of an operating cash outflow and a financing cash inflow for excess tax benefits on exercised stock options and vesting of deferred shares. These eliminations decreased net cash provided by operating activities by $3.3 million and decreased net cash used by financing activities by $3.3 million for the year ended June 30, 2016, and decreased net cash provided by operating activities by $1.8 million and increased cash provided by financing activities by $1.8 million for the year ended June 30, 2015. Net cash flows did not change in either year as a result of the retrospective adjustment. Accounting for Forfeitures : The amendments in this ASU allow the Company to elect, as a company-wide accounting policy, either to continue to estimate the amount of forfeitures to exclude from compensation expense or to exclude forfeitures from compensation expense as they occur. Upon the adoption of the ASU during the first quarter of fiscal 2017, the Company elected to account for forfeitures as they occur. The Company is required to apply these amendments on a modified retrospective basis with a cumulative adjustment to retained earnings as of the beginning of the fiscal year. The Company recorded a modified retrospective adjustment to reduce the June 30, 2016 retained earnings balance and increase the APIC balance by $0.1 million each. Statutory Tax Withholding Requirements : Under the prior accounting standard, an entire award must be classified as a liability if the fair value of the shares withheld exceeds the Company's minimum statutory withholding obligation. Under the ASU, the Company is allowed to withhold shares with a fair value up to the amount of tax owed using the maximum statutory tax rate in the employee's applicable jurisdictions. The Company is allowed to determine one maximum rate for all employees in each jurisdiction, rather than a rate for each employee in the jurisdiction. Also, the ASU requires that cash outflows to reacquire shares withheld for taxes to be classified in the financing section of the statement of cash flows. The Company adopted the ASU during the first quarter of fiscal 2017. Since the Company did not have any awards classified as liabilities due to statutory tax withholding requirements as of June 30, 2017, and since the Company already presented its cash outflows for reacquiring shares withheld for taxes as a financing activity in its statements of cash flows, these amendments did not have any impact on its financial statements upon adoption. The Company does not expect changes to employee withholdings for stock compensation to have a material impact to the financial statements. Accounting Standards Update 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments On June 16, 2016, the FASB issued ASU 2016-13, which will change how the Company accounts for its allowance for uncollectible accounts. The amendments in this update require a financial asset (or a group of financial assets) to be presented at the net amount expected to be collected. The income statement will reflect any increases or decreases of expected credit losses that have taken place during the period. The measurement of expected credit losses is based on relevant information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectibility of the reported amount. Current GAAP delays the recognition of the full amount of credit losses until the loss is probable of occurring. The amendments in this update eliminate the probable initial recognition threshold and, instead, reflect the Company's current estimate of all expected credit losses. In addition, current guidance limits the information the Company may consider in measuring a credit loss to its past events and current conditions. The amendments in this update broaden the information the Company may consider in developing its expected credit loss estimate to include forecasted information. The amendments in this update are effective for the Company on July 1, 2020 and the Company may early adopt on July 1, 2019. The Company must apply the amendments in this update through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective. At this time, the Company does not expect this update to have a material impact to its estimate of the allowance for uncollectible accounts. Accounting Standards Update 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment On January 26, 2017, the FASB issued ASU 2017-04, which simplifies the goodwill impairment test by eliminating step two from the procedure. Previously, goodwill was tested for impairment by performing a two-step test. The first step involves determining the fair value of a reporting unit and comparing it to the carrying amount of the reporting unit's net assets. If the fair value of the reporting unit is less than its carrying amount, then the goodwill assigned to that reporting unit is determined to be impaired and step two must then be completed to measure the amount of the impairment. Step two involved measuring the reporting unit's assets and liabilities at fair value following a process similar to determining the fair value of assets acquired and liabilities assumed in a business combination. The net fair value of the assets acquired and liabilities assumed was then compared to the fair value of the reporting unit in order to compute the implied goodwill for the reporting unit. The difference between the carrying amount of the reporting unit's goodwill and the amount of the implied goodwill computed was the amount of the goodwill impairment to be recognized. Under ASU 2017-04, instead of performing step two of the test, the Company will recognize an impairment charge to the extent a reporting unit's fair value is less than the carrying amount of its net assets, as indicated by step one of the test. The standard must be applied prospectively and must be adopted in fiscal years beginning after December 15, 2019. Early adoption is permitted and the Company adopted the ASU during its fourth fiscal quarter of 2017. The Company performed its annual goodwill impairment test on May 31, 2017 in accordance with the adopted ASU. Accounting Standards Update 2017-09, Compensation-Stock Compensation (Topic 718): Scope of Modification Accounting In May 2017, the FASB issued ASU 2017-09 which clarifies when changes to the terms or conditions of a share-based payment award must be accounted for as a modification. Entities should apply the modification accounting guidance if the value, vesting conditions or classification of the award changes. ASU 2017-09 is effective for interim and annual reporting periods beginning after December 15, 2017. Early adoption is permitted and prospective application is required. Management does not expect the adoption of ASU 2017-09 to have a material impact on the Company’s financial position, results of operations or cash flows.

Acquisitions (Tables)

Acquisitions (Tables)	12 Months Ended
	Jun. 30, 2017
Houston Interests, LLC [Member]
Business Acquisition [Line Items]
Consideration transferred [Table Text Block]	The Company purchased all of the equity interests of Houston Interests for $42.5 million, net of working capital adjustments and cash acquired. The consideration paid as of June 30, 2017 is as follows (in thousands): Cash paid for equity interest $ 46,000 Cash paid for working capital 5,150 Less: cash acquired (10,331 ) Cash consideration paid 40,819 Accrued working capital adjustment 1,687 Net purchase price $ 42,506
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table summarizes the preliminary net purchase price allocation (in thousands): Cash and cash equivalents $ 10,331 Accounts receivable 10,273 Costs and estimated earnings in excess of billings on uncompleted contracts 746 Other current assets 454 Current assets 21,804 Property, plant and equipment 942 Goodwill 35,146 Other intangible assets 10,220 Total assets acquired 68,112 Accounts payable 962 Billings on uncompleted contracts in excess of costs and estimated earnings 11,648 Other accrued expenses 2,475 Current liabilities 15,085 Other liabilities 190 Net assets acquired 52,837 Less: cash acquired 10,331 Net purchase price $ 42,506
Business Acquisition, Pro Forma Information	The unaudited financial information in the table below summarizes the combined results of operations of Matrix Service Company and Houston Interests for the years ended June 30, 2017 and 2016, on a pro forma basis, as though the companies had been combined as of July 1, 2015. The pro forma financial information presented in the table below is for informational purposes only and is not indicative of the results of operations that would have been achieved if the acquisition had taken place at July 1, 2015 nor should it be taken as indicative of future consolidated results of operations. Twelve Months Ended June 30, 2017 June 30, 2016 (In thousands, except per share data) Revenues $ 1,233,372 $ 1,427,313 Net income attributable to Matrix Service Company $ 7,326 $ 32,352 Basic earnings per common share $ 0.28 $ 1.22 Diluted earnings per common share $ 0.27 $ 1.19
Baillie Tank Equipment, Ltd. [Member]
Business Acquisition [Line Items]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table summarizes the final purchase price allocation (in thousands): Current assets $ 5,574 Property, plant and equipment 4,347 Goodwill 7,030 Other intangible assets 720 Other assets 233 Total assets acquired 17,904 Current liabilities 1,669 Deferred income taxes 329 Long-term debt 1,858 Other liabilities 407 Net assets acquired 13,641 Less: cash acquired 592 Net purchase price $ 13,049
HDB, Inc. [Member]
Business Acquisition [Line Items]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table summarizes the purchase price allocation (in thousands): Current assets $ 1,645 Property, plant and equipment 1,001 Tax deductible goodwill 3,065 Other intangible assets 900 Total assets acquired 6,611 Current liabilities 1,060 Net assets acquired $ 5,551

Customer Contracts (Tables)

Customer Contracts (Tables)	12 Months Ended
	Jun. 30, 2017
Contractors [Abstract]
Gross and net amount of uncompleted contracts	Gross and net amounts on uncompleted contracts are as follows: June 30, June 30, (In thousands) Costs and estimated earnings recognized on uncompleted contracts $ 1,919,054 $ 1,875,014 Billings on uncompleted contracts 1,903,001 1,829,340 $ 16,053 $ 45,674 Shown on balance sheet as: Costs and estimated earnings in excess of billings on uncompleted contracts $ 91,180 $ 104,001 Billings on uncompleted contracts in excess of costs and estimated earnings 75,127 58,327 $ 16,053 $ 45,674

Goodwill and Other Intangible28

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Jun. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Carrying value of goodwill by segment	The changes in the carrying amount of goodwill by segment are as follows: Electrical Infrastructure Oil Gas & Chemical Storage Solutions Industrial Total (In thousands) Net balance at June 30, 2014 $ 43,243 $ 10,943 $ 10,027 $ 5,624 $ 69,837 Acquisition related adjustments 175 — — 44 219 Purchase of HDB (Note 2) — 3,065 — — 3,065 Translation adjustment (1) (1,044 ) — (363 ) (196 ) (1,603 ) Net balance at June 30, 2015 42,374 14,008 9,664 5,472 71,518 Purchase of BTE (Note 2) — — 6,942 — 6,942 Translation adjustment (1) (204 ) — 75 (38 ) (167 ) Net balance at June 30, 2016 42,170 14,008 16,681 5,434 78,293 Purchase of Houston Interests (Note 2) — 19,596 — 15,550 35,146 Acquisition related adjustments — — 88 — 88 Translation adjustment (1) (18 ) — (5 ) (3 ) (26 ) Net balance at June 30, 2017 $ 42,152 $ 33,604 $ 16,764 $ 20,981 $ 113,501
Carrying value of other intangible assets	Information on the carrying value of other intangible assets is as follows: At June 30, 2017 Useful Life Gross Carrying Amount Accumulated Amortization Net Carrying Amount (Years) (In thousands) Intellectual property 9 to 15 $ 2,579 $ (1,425 ) $ 1,154 Customer based 1 to 15 38,207 (13,543 ) 24,664 Non-compete Agreements 4 to 5 1,453 (1,298 ) 155 Trade names 1 to 3 1,630 (1,307 ) 323 Total other intangible assets $ 43,869 $ (17,573 ) $ 26,296 At June 30, 2016 Useful Life Gross Carrying Amount Accumulated Amortization Net Carrying Amount (Years) (In thousands) Intellectual property 9 to 15 $ 2,579 $ (1,246 ) $ 1,333 Customer based 1.5 to 15 28,179 (9,655 ) 18,524 Non-compete agreements 4 to 5 1,453 (1,102 ) 351 Trade name 3 to 5 1,615 (824 ) 791 Total other intangible assets $ 33,826 $ (12,827 ) $ 20,999
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	Amortization expense totaled $4.9 million , $3.6 million , and $5.0 million in fiscal 2017 , 2016 , and 2015, respectively. The Company recognized $1.6 million of amortization expense during the year ended June 30, 2017 for intangible assets recorded as part of the Houston Interests acquisition. We estimate that future amortization of other intangible assets will be as follows (in thousands): For year ending: June 30, 2018 $ 4,742 June 30, 2019 3,501 June 30, 2020 3,491 June 30, 2021 3,472 June 30, 2022 2,618 Thereafter 8,472 Total estimated amortization expense $ 26,296

Debt (Tables)

Debt (Tables)	12 Months Ended
	Jun. 30, 2017
Debt Disclosure [Abstract]
Availability under the senior credit facility	June 30, June 30, (In thousands) Senior revolving credit facility $ 300,000 $ 200,000 Capacity constraint due to the Leverage Ratio 169,092 20,138 Capacity under the senior revolving credit facility 130,908 179,862 Letters of credit issued 7,825 20,755 Borrowings outstanding 44,682 — Availability under the senior revolving credit facility $ 78,401 $ 159,107

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Jun. 30, 2017
Income Tax Disclosure [Abstract]
Schedule of sources of pretax income	The sources of pretax income (loss) are as follows: Twelve Months Ended June 30, June 30, June 30, (In thousands) Domestic $ 19,763 $ 33,986 $ (4,001 ) Foreign (17,317 ) 5,667 12,193 Total $ 2,446 $ 39,653 $ 8,192
Components of the provision for income taxes	The components of the provision for income tax expense (benefit) are as follows: Twelve Months Ended June 30, June 30, June 30, (In thousands) Current: Federal $ 6,522 $ 9,930 $ 7,535 State (185 ) 2,570 1,606 Foreign (1,509 ) (262 ) 1,791 4,828 12,238 10,932 Deferred: Federal 618 887 1,803 State 101 67 (362 ) Foreign (3,239 ) 924 (2,283 ) (2,520 ) 1,878 (842 ) $ 2,308 $ 14,116 $ 10,090
Difference between expected income tax provision applying domestic federal statutory tax rate and reported income tax provision	The difference between the expected income tax provision applying the domestic federal statutory tax rate and the reported income tax provision is as follows: Twelve Months Ended June 30, June 30, June 30, (In thousands) Expected provision for Federal income taxes at the statutory rate $ 857 $ 13,879 $ 2,868 State income taxes, net of Federal benefit 808 1,827 1,023 Deemed foreign dividends — — 1,462 Charges without tax benefit 1,741 2,187 1,478 Change in valuation allowance 1,295 311 25 Excess tax benefits on stock-based compensation (1) (496 ) — — IRC S199 deduction (749 ) (999 ) — Foreign tax credits — — (1,433 ) Research and development and other tax credits (1,626 ) (1,928 ) (1,197 ) Foreign tax differential 1,496 (815 ) (529 ) Noncontrolling interest (112 ) 1,164 6,669 Change in uncertain tax positions (22 ) (569 ) — Adjustment to tax accounts (924 ) (786 ) — Other 40 (155 ) (276 ) Provision for income taxes $ 2,308 $ 14,116 $ 10,090
Significant components of Company's deferred tax assets and liabilities	Significant components of the Company’s deferred tax assets and liabilities are as follows: June 30, June 30, (In thousands) Deferred tax assets: Warranty reserve $ 312 $ 195 Bad debt reserve 3,869 3,188 Paid-time-off accrual 821 865 Insurance reserve 2,284 2,461 Legal reserve 82 87 Net operating loss benefit and credit carryforwards 9,332 8,207 Valuation allowance (1,719 ) (424 ) Accrued compensation and pension 1,346 1,268 Stock compensation expense on nonvested deferred shares 3,731 3,472 Accrued losses 340 274 Foreign currency translation and other 1,080 1,041 Total deferred tax assets 21,478 20,634 Deferred tax liabilities: Tax over book depreciation 11,446 11,504 Tax over book amortization 3,325 2,588 Branch future liability 2,538 2,889 Prepaid insurance — 396 Receivable holdbacks and other 912 2,736 Total deferred tax liabilities 18,221 20,113 Net deferred tax asset $ 3,257 $ 521
Significant components of Company's deferred tax assets and liabilities as reported in consolidated balance sheets	June 30, June 30, (In thousands) Deferred income tax assets 3,385 3,719 Deferred income tax liabilities (128 ) (3,198 ) Net deferred tax asset $ 3,257 $ 521
Summary of Tax Credit Carryforwards	These carryforwards will generally expire as shown below: Tax Credit Carryforwards Expiration Period Amount (in thousands) State tax credits June 2017 to June 2032 $ 498 Federal foreign tax credits June 2018 to June 2024 $ 2,348 Foreign tax credits June 2034 to June 2036 $ 612
Summary of Operating Loss Carryforwards	Operating Loss Carryforwards Expiration Period Amount (in thousands) State net operating losses June 2022 to June 2037 $ 19,015 Foreign net operating losses December 2028; June 2031 to June 2036 $ 15,454

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Jun. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock option activity and related information	Stock option activity and related information for the year ended June 30, 2017 is as follows: Number of Options Weighted-Average Remaining Contractual Life Weighted-Average Exercise Price Aggregate Intrinsic Value (Years) (In thousands) Outstanding at June 30, 2016 122,063 5.3 $ 10.19 $ 769 Granted — — Exercised (24,813 ) $ 10.19 $ 268 Canceled — — Outstanding at June 30, 2017 97,250 P5Y3M $ 10.19 $ — Vested at June 30, 2017 97,250 P5Y3M $ 10.19 $ — Exercisable at June 30, 2017 97,250 P5Y3M $ 10.19 $ —
Nonvested deferred share activity	Nonvested deferred share activity for the twelve months ended June 30, 2017 is as follows: Shares Weighted Average Grant Date Fair Value per Share Nonvested shares at June 30, 2016 791,995 $ 21.45 Shares granted 516,969 $ 19.80 Performance shares earned in excess of target 88,523 $ 18.90 Shares vested and released (396,530 ) $ 18.24 Shares canceled (5,604 ) $ 19.70 Nonvested shares at June 30, 2017 995,353 $ 21.65

Earnings per Common Share (Tabl

Earnings per Common Share (Tables)	12 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
Computation of basic and diluted earnings per share	The computation of basic and diluted EPS is as follows: Years Ended June 30, June 30, June 30, (In thousands, except per share data) Basic EPS: Net income (loss) attributable to Matrix Service Company $ (183 ) $ 28,863 $ 17,157 Weighted average shares outstanding 26,533 26,597 26,603 Basic earnings (loss) per share $ (0.01 ) $ 1.09 $ 0.64 Diluted EPS: Weighted average shares outstanding—basic 26,533 26,597 26,603 Dilutive stock options — 68 110 Dilutive nonvested deferred shares — 435 464 Diluted weighted average shares 26,533 27,100 27,177 Diluted earnings (loss) per share $ (0.01 ) $ 1.07 $ 0.63
Schedule of antidilutive securities excluded from computation of diluted earnings per share	The following securities are considered antidilutive and have been excluded from the calculation of diluted earnings (loss) per share: Twelve Months Ended June 30, June 30, June 30, (In thousands) Stock options 43 — — Nonvested deferred shares 430 56 148 Total antidilutive securities 473 56 148

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Jun. 30, 2017
Compensation and Retirement Disclosure [Abstract]
Multiemployer Pension Plans	Our participation in significant plans for the fiscal year ended June 30, 2017 is outlined in the table below. The “EIN/Pension Plan Number” column provides the Employer Identification Number (“EIN”) and the three digit plan number. The zone status is based on the latest information that the Company received from the plan and is certified by the plan’s actuary. Plans in the red zone are generally less than 65 percent funded, plans in the yellow zone are generally less than 80 percent funded, and plans in the green zone are generally at least 80 percent funded. The “FIP/RP Status Pending/Implemented” column indicates plans for which a financial improvement plan (“FIP”) or a rehabilitation plan (“RP”) is either pending or has been implemented. The “Surcharge Imposed” column includes plans in a red zone status that require a payment of a surcharge in excess of regular contributions. The last column lists the expiration date of the collective-bargaining agreement to which the plan is subject. Pension Fund EIN/Pension Plan Number Pension Protection Act Zone Status FIP/RP Status Pending or Implemented Company Contributions Fiscal Year Surcharge Imposed Expiration Date of Collective- Bargaining Agreement 2017 2016 2017 2016 2015 (In thousands) Boilermaker-Blacksmith National Pension Trust 48-6168020/001 Described below (2) Described below (2) Described below (2) $ 7,098 $ 7,658 $ 8,330 Described below (2) Described below (1) Joint Pension Fund Local Union 164 IBEW 22-6031199/001 Described below (2) Described below (2) Described below (2) 2,709 2,635 3,026 Described below (2) 5/31/2021 Joint Pension Fund of Local Union No 102 22-1615726/001 Green Green N/A 2,392 3,063 2,395 No 5/31/2019 IBEW Local 456 Pension Plan 22-6238995/001 Green Green N/A 2,777 1,168 788 No 12/3/2017 Local 351 IBEW Pension Plan 22-3417366/001 Green Green N/A 2,796 5,018 2,608 No 9/30/2017 Steamfitters Local Union No 420 Pension Plan 23-2004424/001 Red Red Yes 2,234 1,265 937 Yes 4/30/2020 IBEW Local Union 98 Pension Plan 23-1990722/001 Described below (2) Described below (2) Described below (2) 1,519 1,653 2,768 Described below (2) 4/28/2018 Indiana Laborers Pension Fund 35-6027150/001 Described below (2) Described below (2) Described below (2) 2,458 2,320 2,519 Described below (2) 5/31/2018 Iron Workers Mid-America Pension Plan 36-6488227/001 Green Green N/A 1,785 2,248 2,605 No 5/31/2019 Plumbers & Pipefitters Local Union 74 Pension Fund 51-6015925/001 Yellow Yellow Yes 4 552 4,473 No 6/15/2018 Pipe Fitters Retirement Fund, Local 597 62-6105084/001 Green Green N/A 2,563 2,377 2,259 No 5/31/2018 Contributions to other multiemployer plans 20,374 16,054 22,282 Total contributions made $ 48,709 $ 46,011 $ 54,990 (1) Our employees are members of several Boilermaker unions that participate in the Boilermaker-Blacksmith National Pension Trust. The most significant of these unions are Boilermakers Local 374 and Boilermakers Local 128, which have collective bargaining agreements that expire on December 31, 2019 and December 31, 2020, respectively. (2) For the Boilermaker-Blacksmith National Pension Trust, Local 164 IBEW Pension Plan, Local 98 IBEW Pension Plan and the Indiana Laborers Pension Fund, the Company has not received a funding notification that covers the Company's fiscal years 2017 or 2016 during the preparation of this Form 10-K. Under Federal pension law, if a multiemployer pension plan is determined to be in critical or endangered status, the plan must provide notice of this status to participants, beneficiaries, the bargaining parties, the Pension Benefit Guaranty Corporation, and the Department of Labor. The Company also observed that these plans have not submitted any Critical or Endangered Status Notices to the Department of Labor for either calendar years 2017 or 2016 (which can be accessed at http://www.dol.gov/ebsa/criticalstatusnotices.html).

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Jun. 30, 2017
Segment Reporting [Abstract]
Results of Operations	Results of Operations (In thousands) Electrical Infrastructure Oil Gas & Chemical Storage Solutions Industrial Unallocated Corporate Total Twelve months ended June 30, 2017 Gross revenues $ 373,384 $ 247,423 $ 483,254 $ 103,449 $ — $ 1,207,510 Less: inter-segment revenues — 6,900 1,558 1,543 — 10,001 Consolidated revenues 373,384 240,523 481,696 101,906 — 1,197,509 Gross profit 7,137 12,675 55,651 5,540 — 81,003 Operating income (loss) (8,309 ) (8,783 ) 22,928 (977 ) — 4,859 Segment assets 183,351 129,177 166,742 53,754 53,006 586,030 Capital expenditures 1,390 829 2,017 38 7,634 11,908 Depreciation and amortization expense 5,198 6,299 7,277 2,828 — 21,602 Twelve months ended June 30, 2016 Gross revenues $ 349,011 $ 252,973 $ 564,738 $ 149,744 $ — $ 1,316,466 Less: inter-segment revenues — 3,178 1,226 145 — 4,549 Consolidated revenues 349,011 249,795 563,512 149,599 — 1,311,917 Gross profit 29,301 18,553 67,843 10,294 — 125,991 Operating income (loss) 11,144 (3,503 ) 33,449 (208 ) — 40,882 Segment assets 135,298 91,350 201,875 67,569 68,875 564,967 Capital expenditures 1,611 1,481 3,882 104 6,861 13,939 Depreciation and amortization expense 5,008 4,811 8,124 3,498 — 21,441 Twelve months ended June 30, 2015 Gross revenues $ 257,930 $ 310,826 $ 504,155 $ 281,319 $ — $ 1,354,230 Less: inter-segment revenues — 5,466 1,032 4,597 — 11,095 Consolidated revenues 257,930 305,360 503,123 276,722 — 1,343,135 Gross profit (loss) (31,444 ) 25,394 58,085 35,335 — 87,370 Operating income (loss) (44,293 ) 7,064 29,069 16,962 — 8,802 Segment assets 129,725 108,960 172,857 102,761 47,386 561,689 Capital expenditures 579 3,858 2,396 1,139 7,801 15,773 Depreciation and amortization expense 4,915 4,772 7,298 6,495 — 23,480
Summary of revenues and long lived assets according to geographic areas	Geographical information is as follows: Revenues Twelve Months Ended June 30, June 30, June 30, (In thousands) United States $ 961,049 $ 1,127,893 $ 1,205,713 Canada 228,625 178,603 137,422 Other international 7,835 5,421 — $ 1,197,509 $ 1,311,917 $ 1,343,135 Long-Lived Assets June 30, June 30, June 30, (In thousands) United States $ 193,164 $ 158,970 $ 166,132 Canada 21,419 19,915 22,086 Other international 12,817 10,636 — $ 227,400 $ 189,521 $ 188,218
Schedule of Revenue by Major Customers by Reporting Segments	Information about Significant Customers Significant Customers as a Percentage of Segment Revenues Consolidated Electrical Infrastructure Oil Gas & Chemical Storage Solutions Industrial Twelve months ended June 30, 2017 Customer one 19.5 % — % — % 48.5 % — % Customer two 15.3 % 46.0 % — % 2.4 % — % Customer three 5.2 % — % 25.8 % — % — % Customer four 4.2 % — % 20.7 % — % — % Customer five 4.0 % 12.7 % — % — % — % Customer six 2.7 % — % — % — % 31.7 % Customer seven 2.2 % — % — % — % 25.8 % Twelve months ended June 30, 2016 Customer one 14.8 % 38.9 % — % 10.2 % — % Customer two 10.6 % — % — % 24.7 % — % Customer three 8.3 % — % — % 19.3 % — % Customer four 4.4 % 16.6 % — % — % — % Customer five 4.2 % — % — % — % 36.9 % Customer six 3.9 % — % 20.2 % — % — % Customer seven 3.8 % 14.4 % — % — % — % Customer eight 3.4 % 12.7 % — % — % — % Customer nine 2.3 % — % — % — % 20.1 % Customer ten 2.1 % — % 11.2 % — % — % Customer eleven 1.6 % — % — % — % 14.0 % Twelve months ended June 30, 2015 Customer one 12.3 % — % — % 33.0 % — % Customer two 7.0 % — % — % — % 34.0 % Customer three 6.5 % 12.7 % — % 10.9 % — % Customer four 5.7 % — % — % — % 27.6 % Customer five 4.8 % 25.1 % — % — % — % Customer six 4.0 % — % 17.7 % — % — % Customer seven 3.9 % — % — % — % 19.0 % Customer eight 3.1 % 16.3 % — % — % — % Customer nine 2.8 % 14.7 % — % — % — % Customer ten 2.8 % — % 12.3 % — % — % Customer eleven 2.4 % 12.7 % — % — % — %

Quarterly Financial Data (Una35

Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Jun. 30, 2017
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Data (Unaudited)	Matrix Service Company Quarterly Financial Data (Unaudited) Fiscal Years Ended June 30, 2017 and June 30, 2016 First Quarter Second Quarter Third Quarter Fourth Quarter (In thousands, except per share amounts) Fiscal Year 2017 Revenues $ 341,781 $ 312,655 $ 251,237 $ 291,836 Gross profit (loss) 32,278 28,212 (2,614 ) 23,127 Operating income (loss) 14,301 8,237 (21,210 ) 3,531 Net income (loss) attributable to Matrix Service Company 9,342 5,250 (13,821 ) (954 ) Earnings (loss) per common share: Basic 0.35 0.20 (0.52 ) (0.04 ) Diluted 0.35 0.20 (0.52 ) (0.04 ) Fiscal Year 2016 Revenues $ 319,331 $ 323,529 $ 309,422 $ 359,635 Gross profit 34,584 30,005 27,303 34,099 Operating income 15,101 4,935 6,347 14,499 Net income attributable to Matrix Service Company 9,941 5,431 4,357 9,134 Earnings per common share: Basic 0.38 0.20 0.16 0.35 Diluted 0.37 0.20 0.16 0.34 The sum of earnings per share for the four quarters may not equal the total earnings per share for the year due to changes in the average number of common shares outstanding and rounding.

Summary of Significant Accoun36

Summary of Significant Accounting Policies (Details Textual) $ in Millions	12 Months Ended
	Jun. 30, 2017USD ($)
Property, Plant and Equipment [Line Items]
Restricted cash	$ 0.3
Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life of intangible assets	1 year
Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful life of intangible assets	15 years
Building [Member]
Property, Plant and Equipment [Line Items]
Depreciable life of office equipment and software	40 years
Construction Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Depreciable life of office equipment and software	3 years
Construction Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Depreciable life of office equipment and software	15 years
Transportation Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Depreciable life of office equipment and software	3 years
Transportation Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Depreciable life of office equipment and software	5 years
Office Equipment and Software [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Depreciable life of office equipment and software	3 years
Office Equipment and Software [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Depreciable life of office equipment and software	10 years
International [Member]
Property, Plant and Equipment [Line Items]
Cash	$ 7.7

Summary of Significant Accoun37

Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Impact of New Accounting Pronouncement) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Effect of new accounting standard compared to old standard	$ 496	$ 0	$ 0
Effect of adoption of new accounting standard compared to old standard, EPS	$ 0.02
New Accounting Pronouncement or Change in Accounting Principle, Description of Prior-period Information Retrospectively Adjusted	The amendments relating to the presentation of excess tax benefits and tax deficiencies in the statement of cash flows were applied retrospectively. The effect of the retrospective adjustment was to eliminate the presentation of an operating cash outflow and a financing cash inflow for excess tax benefits on exercised stock options and vesting of deferred shares. These eliminations decreased net cash provided by operating activities by $3.3 million and decreased net cash used by financing activities by $3.3 million for the year ended June 30, 2016, and decreased net cash provided by operating activities by $1.8 million and increased cash provided by financing activities by $1.8 million for the year ended June 30, 2015. Net cash flows did not change in either year as a result of the retrospective adjustment.

Acquisitions (Details Textual)

Acquisitions (Details Textual) - USD ($) $ in Thousands	Jul. 03, 2017	Dec. 12, 2016	Feb. 01, 2016	Feb. 01, 2016	Aug. 22, 2014	Jun. 30, 2017	Jun. 30, 2016	Sep. 30, 2015	Jun. 30, 2015	Jun. 30, 2014
Business Acquisition [Line Items]
Goodwill						$ 113,501	$ 78,293		$ 71,518	$ 69,837
Noncontrolling interest in joint venture						0	(1,176)
Houston Interests, LLC [Member]
Business Acquisition [Line Items]
Net purchase price		$ 42,506
Business Acquisition, Effective Date of Acquisition		Dec. 12, 2016
Net assets acquired		$ 52,837
Tax deductible goodwill		$ 35,146
Warranty reserve working capital provision						2,600
Settlement of warranty reserve	$ 1,687
Acquisition-related expenses						600
Revenue of Acquiree since Acquisition Date, Actual						33,400
Earnings of Acquiree since Acquisition Date, Actual						1,300
Baillie Tank Equipment, Ltd. [Member]
Business Acquisition [Line Items]
Net purchase price				$ 13,049
Business Acquisition, Effective Date of Acquisition			Feb. 1, 2016
Net assets acquired			$ 13,641	13,641
Economic purchase price			15,400
Goodwill			$ 7,030	$ 7,030
Acquisition-related expenses							1,200
Revenue of Acquiree since Acquisition Date, Actual						7,800	5,400
Earnings of Acquiree since Acquisition Date, Actual						$ 500	$ 300
HDB, Inc. [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition					Aug. 22, 2014
Net assets acquired					$ 5,551			$ 5,600
Tax deductible goodwill					$ 3,065

Acquisitions (Details)

Acquisitions (Details) - USD ($) $ / shares in Units, $ in Thousands	Dec. 12, 2016	Feb. 01, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015	Sep. 30, 2015	Aug. 22, 2014	Jun. 30, 2014
Business Acquisition [Line Items]
Acquisition Related Adjustment for Final Working Capital Settlement			$ 88		$ 219
Accrued working capital adjustment			1,687	$ 0	0
Goodwill			113,501	78,293	$ 71,518			$ 69,837
Houston Interests, LLC [Member]
Business Acquisition [Line Items]
Net purchase price	$ 42,506
Cash paid for equity interest	46,000
Acquisition Related Adjustment for Final Working Capital Settlement	5,150
Cash consideration paid	40,819
Accrued working capital adjustment	1,687
Accounts receivable	10,273
Costs and estimated earnings in excess of billings on uncompleted contracts	746
Other current assets	454
Current assets	21,804
Property, plant and equipment	942
Tax deductible goodwill	35,146
Other intangible assets	10,220
Total assets acquired	68,112
Accounts payable	962
Billings on uncompleted contracts in excess of costs and estimated earnings	11,648
Other accrued expenses	2,475
Current liabilities	15,085
Other liabilities	190
Net assets acquired	52,837
Cash acquired	$ 10,331
Pro Forma Information:
Revenues			1,233,372	1,427,313
Net income attributable to Matrix Service Company			$ 7,326	$ 32,352
Basic earnings per common share (in dollars per share)			$ 0.28	$ 1.22
Diluted earnings per common share (in dollars per share)			$ 0.27	$ 1.19
Pro forma acquisition costs			$ 3,300
Pro forma acquisition costs, amortized over time			800	$ 900
Pro forma interest expense			700	1,400
Pro forma depreciation and amortization expense			1,400	1,800
Pro forma income tax expense			$ 2,000	$ 2,200
Baillie Tank Equipment, Ltd. [Member]
Business Acquisition [Line Items]
Net purchase price		$ 13,049
Current assets		5,574
Property, plant and equipment		4,347
Goodwill		7,030
Other intangible assets		720
Other assets		233
Total assets acquired		17,904
Current liabilities		1,669
Deferred income taxes		329
Long-term debt		1,858
Other liabilities		407
Net assets acquired		13,641
Cash acquired		$ 592
HDB, Inc. [Member]
Business Acquisition [Line Items]
Current assets							$ 1,645
Property, plant and equipment							1,001
Tax deductible goodwill							3,065
Other intangible assets							900
Total assets acquired							6,611
Current liabilities							1,060
Net assets acquired						$ 5,600	$ 5,551

Customer Contracts (Details)

Customer Contracts (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Gross and net amount of uncompleted contracts
Costs and estimated earnings recognized on uncompleted contracts	$ 1,919,054	$ 1,875,014
Billings on uncompleted contracts	1,903,001	1,829,340
Total	16,053	45,674
Shown on balance sheet as:
Costs and estimated earnings in excess of billings on uncompleted contracts	91,180	104,001
Billings on uncompleted contracts in excess of costs and estimated earnings	75,127	58,327
Total	$ 16,053	$ 45,674

Customer Contracts (Details Tex

Customer Contracts (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2017	Jun. 30, 2016
Business Acquisition [Line Items]
Contract Receivable Retainage, Next Twelve Months		$ 54.3	$ 29.7
Contract Receivable Retainage, after Next Twelve Months		1.9	0.3
Retention Payable		$ 12.6	$ 14.9
Change In Accounting Estimate, Financial Effect, Operating Income	$ 53.4
Change in Accounting Estimate, Financial Effect, Net Income	18.3

Goodwill and Other Intangible42

Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015	May 31, 2017
Carrying value of goodwill by segment
Net Goodwill	$ 78,293	$ 71,518	$ 69,837
Acquisition Related Adjustment for Final Working Capital Settlement	88		219
Goodwill resulting from purchase	35,146	6,942	3,065
Translation adjustment	(26)	(167)	(1,603)
Net Goodwill	113,501	78,293	71,518
Electrical Infrastructure [Member]
Carrying value of goodwill by segment
Net Goodwill	42,170	42,374	43,243
Acquisition Related Adjustment for Final Working Capital Settlement	0		175
Goodwill resulting from purchase	0	0	0
Translation adjustment	(18)	(204)	(1,044)
Net Goodwill	42,152	42,170	42,374
Oil Gas & Chemical [Member]
Carrying value of goodwill by segment
Net Goodwill	14,008	14,008	10,943
Acquisition Related Adjustment for Final Working Capital Settlement	0		0
Goodwill resulting from purchase	19,596	0	3,065
Translation adjustment	0	0	0
Net Goodwill	33,604	14,008	14,008
Storage Solutions [Member]
Carrying value of goodwill by segment
Net Goodwill	16,681	9,664	10,027
Acquisition Related Adjustment for Final Working Capital Settlement	88		0
Goodwill resulting from purchase	0	6,942	0
Translation adjustment	(5)	75	(363)
Net Goodwill	16,764	16,681	9,664
Industrial [Member]
Carrying value of goodwill by segment
Net Goodwill	5,434	5,472	5,624
Acquisition Related Adjustment for Final Working Capital Settlement	0		44
Goodwill resulting from purchase	15,550	0	0
Translation adjustment	(3)	(38)	(196)
Net Goodwill	20,981	$ 5,434	$ 5,472
Reporting Unit at Risk [Member]
Carrying value of goodwill by segment
Net Goodwill	$ 8,000
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount				9.00%

Goodwill and Other Intangible43

Goodwill and Other Intangible Assets (Details 1) - USD ($) $ in Thousands	Dec. 12, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets		$ 4,900	$ 3,600	$ 5,000
Carrying value of other intangible assets
Gross carrying amount		43,869	33,826
Accumulated amortization		(17,573)	(12,827)
Net carrying amount		26,296	20,999
Intangible assets, net, excluding Goodwill		$ 26,296	20,999
Minimum [Member]
Carrying value of other intangible assets
Useful life of intangible assets		1 year
Maximum [Member]
Carrying value of other intangible assets
Useful life of intangible assets		15 years
Intellectual Property [Member]
Carrying value of other intangible assets
Gross carrying amount		$ 2,579	2,579
Accumulated amortization		(1,425)	(1,246)
Net carrying amount		$ 1,154	$ 1,333
Intellectual Property [Member] | Minimum [Member]
Carrying value of other intangible assets
Useful life of intangible assets		9 years	9 years
Intellectual Property [Member] | Maximum [Member]
Carrying value of other intangible assets
Useful life of intangible assets		15 years	15 years
Customer based [Member]
Carrying value of other intangible assets
Gross carrying amount		$ 38,207	$ 28,179
Accumulated amortization		(13,543)	(9,655)
Net carrying amount		$ 24,664	$ 18,524
Customer based [Member] | Minimum [Member]
Carrying value of other intangible assets
Useful life of intangible assets		1 year	1 year 6 months
Customer based [Member] | Maximum [Member]
Carrying value of other intangible assets
Useful life of intangible assets		15 years	15 years
Noncompete Agreements [Member]
Carrying value of other intangible assets
Gross carrying amount		$ 1,453	$ 1,453
Accumulated amortization		(1,298)	(1,102)
Net carrying amount		$ 155	$ 351
Noncompete Agreements [Member] | Minimum [Member]
Carrying value of other intangible assets
Useful life of intangible assets		4 years	4 years
Noncompete Agreements [Member] | Maximum [Member]
Carrying value of other intangible assets
Useful life of intangible assets		5 years	5 years
Trade Names [Member]
Carrying value of other intangible assets
Gross carrying amount		$ 1,630	$ 1,615
Accumulated amortization		(1,307)	(824)
Net carrying amount		$ 323	$ 791
Trade Names [Member] | Minimum [Member]
Carrying value of other intangible assets
Useful life of intangible assets		1 year	3 years
Trade Names [Member] | Maximum [Member]
Carrying value of other intangible assets
Useful life of intangible assets		3 years	5 years
Houston Interests, LLC [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets		$ 1,600
Houston Interests, LLC [Member] | Customer based [Member]
Carrying value of other intangible assets
Gross carrying amount	$ 10,000
Houston Interests, LLC [Member] | Customer based [Member] | Minimum [Member]
Carrying value of other intangible assets
Useful life of intangible assets	1 year
Houston Interests, LLC [Member] | Customer based [Member] | Maximum [Member]
Carrying value of other intangible assets
Useful life of intangible assets	9 years
Houston Interests, LLC [Member] | Trade Names [Member]
Carrying value of other intangible assets
Useful life of intangible assets	1 year
Gross carrying amount	$ 200
Reporting Unit [Member]
Carrying value of other intangible assets
Net book value of intangible asset at risk of impairment		$ 7,200

Goodwill and Other Intangible44

Goodwill and Other Intangible Assets (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense	$ 4,900	$ 3,600	$ 5,000
June 30, 2015	4,742
June 30, 2016	3,501
June 30, 2017	3,491
June 30, 2018	3,472
June 30, 2019	2,618
Thereafter	8,472
Net carrying amount	$ 26,296	$ 20,999

Debt (Details)

Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016
Availability under senior credit facility
Senior revolving credit facility	$ 300,000	$ 250,000	$ 200,000
Capacity Constraint Due To Senior Leverage Ratio	169,092		20,138
Line Of Credit Facility Maximum Borrowing Capacity After Consideration Of Capacity Constraint	130,908		179,862
Borrowings outstanding	44,682		0
Letters of credit issued	7,825		20,755
Availability under the senior credit facility	$ 78,401		$ 159,107

Debt (Details Textual)

Debt (Details Textual)	3 Months Ended	12 Months Ended
	Sep. 30, 2017	Jun. 30, 2017USD ($)Rate	Dec. 31, 2016USD ($)	Jun. 30, 2016USD ($)
Debt (Textual) [Abstract]
Senior revolving credit facility | $		$ 300,000,000	$ 250,000,000	$ 200,000,000
Line of Credit Facility, Expiration Date		Feb. 8, 2022
Leverage Ratio, Maximum		3
Leverage Ratio, Minimum		1
Fixed Charge Coverage Ratio, Maximum		1.25
Fixed Charge Coverage Ratio, Minimum		1
Limit on asset dispositions | $		$ 20
Sublimit on Australian Dollar, Canadian Dollar, Euro and Pounds Sterling | $		75
Sublimit on letters of credit under the credit facility | $		$ 200
Additional Margin on alternate base rate loans, Minimum		0.625%
Additional Margin on alternate base rate loans, Maximum		1.625%
Line Of Credit Basis Spread On Adjusted LIBO, EURIBO and CDOR Minimum		1.625%
Line Of Credit Basis Spread On Adjusted LIBO, EURIBO and CDOR Maximum		2.625%
Line Of Credit Basis Spread On Canadian Prime Rate Minimum		2.125%
Line Of Credit Basis Spread On Canadian Prime Rate Maximum		3.125%
Maximum limit of consolidated funded indebtedness		3
Consolidated EBITDA as defined in the Credit Agreement | $		$ 43,600,000
Consolidated Funded Indebtedness | $		$ 52,500,000
Subsequent Events [Abstract]
Subsequent Event, Description	Subsequent Event On August 31, 2017, the Company entered in to an amendment to its Credit Agreement, which provided the following: • The maximum permitted Leverage Ratio was temporarily increased to 4.00 to 1.00 for the quarters ending September 30, 2017, and December 31, 2017. The maximum Leverage Ratio will revert back to 3.00 to 1.00 beginning with the quarter ending March 31, 2018. • The Fixed Charge Coverage Ratio will not be tested for the quarters ending September 30, 2017 and December 31, 2017, but will be in effect and tested quarterly thereafter beginning with the quarter ending March 31, 2018. • A new minimum Consolidated EBITDA covenant was added solely for the four-quarter period ending December 31, 2017. For this period, the Company is required to achieve Consolidated EBITDA of $15.0 million. • The Restricted Payments covenant was amended to restrict cash dividends and share repurchases during the period beginning August 31, 2017 and ending December 31, 2017 to an aggregate basket of $5.0 million. In addition, during such period, both cash dividends and share repurchases are prohibited unless the pro forma Leverage Ratio is less than or equal to 2.50 to 1.00. Thereafter, the restriction reverts back to limiting cash dividends to 50% of net income for each fiscal year, and limiting share repurchases to $30.0 million per calendar year. • An additional increased pricing tier was added for the "Covenant Relief Period" beginning on August 31, 2017 and ending on the date we deliver our financial statements and compliance certificate for the fiscal quarter ending December 31, 2017. If our Leverage Ratio as of any quarterly calculation date during the Covenant Relief Period exceeds 3.00 to 1.00: (1) the Applicable Margin on ABR loans will be 1.875%; (2) the Applicable Margin for Adjusted LIBO, EURIBO and CDOR will be 2.875%; (3) the Applicable Margin for Canadian Prime Rate loans will be 3.375%; and (4) the unused credit facility fee will be 0.50%.
Minimum [Member]
Debt (Textual) [Abstract]
Unused Credit Facility Fee		0.25%
Maximum [Member]
Debt (Textual) [Abstract]
Unused Credit Facility Fee		0.45%

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Components of pretax income
Domestic	$ 19,763	$ 33,986	$ (4,001)
Foreign	(17,317)	5,667	12,193
Income before income tax expense	$ 2,446	$ 39,653	$ 8,192

Income Taxes (Details 1)

Income Taxes (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Current:
Federal	$ 6,522	$ 9,930	$ 7,535
State	(185)	2,570	1,606
Foreign	(1,509)	(262)	1,791
Total	4,828	12,238	10,932
Deferred:
Federal	618	887	1,803
State	101	67	(362)
Foreign	(3,239)	924	(2,283)
Total	(2,520)	1,878	(842)
Provision for income taxes	$ 2,308	$ 14,116	$ 10,090

Income Taxes (Details 2)

Income Taxes (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Difference between expected income tax provision applying domestic federal statutory tax rate and reported income tax provision
Expected provision for Federal income taxes at the statutory rate	$ 857	$ 13,879	$ 2,868
State income taxes, net of Federal benefit	808	1,827	1,023
Deemed foreign dividends	0	0	1,462
Charges without tax benefit	1,741	2,187	1,478
Change in valuation allowance	1,295	311	25
Excess tax benefits on stock-based compensation	(496)	0	0
IRS S199 deduction	(749)	(999)	0
Foreign tax credits	0	0	(1,433)
Research and development and other tax credits	(1,626)	(1,928)	(1,197)
Foreign tax differential	1,496	(815)	(529)
Noncontrolling interest	(112)	1,164	6,669
Change in uncertain tax positions	(22)	(569)	0
Adjustment to tax accounts	(924)	(786)	0
Other	40	(155)	(276)
Provision for income taxes	$ 2,308	$ 14,116	$ 10,090

Income Taxes (Details 3)

Income Taxes (Details 3) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Deferred tax assets:
Warranty reserve	$ 312	$ 195
Bad debt reserve	3,869	3,188
Paid time-off accrual	821	865
Insurance reserve	2,284	2,461
Legal reserve	82	87
Net operating loss benefit and credit carryforwards	9,332	8,207
Valuation allowance	(1,719)	(424)
Accrued compensation and pension	1,346	1,268
Stock compensation expense on nonvested deferred shares	3,731	3,472
Accrued losses	340	274
Foreign currency translation and other	1,080	1,041
Total deferred tax assets	21,478	20,634
Deferred tax liabilities:
Tax over book depreciation	11,446	11,504
Tax over book amortization	3,325	2,588
Branch future liability	2,538	2,889
Prepaid insurance	0	396
Receivable holdbacks and other	912	2,736
Total deferred tax liabilities	18,221	20,113
Net deferred tax asset	$ 3,257	$ 521

Income Taxes (Details 4)

Income Taxes (Details 4) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Significant components of Company's deferred tax assets and liabilities as reported in consolidated balance sheets
Deferred income tax assets	$ 3,385	$ 3,719
Deferred income tax liabilities	(128)	(3,198)
Net deferred tax asset	$ 3,257	$ 521

Income Taxes Income Taxes (Deta

Income Taxes Income Taxes (Details 5) $ in Millions	12 Months Ended
	Jun. 30, 2017USD ($)
State tax credit carryforward [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Description	June 2017 to June 2032
Tax Credit Carryforward, Amount	$ 0
Federal tax credit carryforward [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Description	June 2018 to June 2024
Tax Credit Carryforward, Amount	$ 2
Foreign tax credit carryforward [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Description	June 2034 to June 2036
Tax Credit Carryforward, Amount	$ 1

Income Taxes Income Taxes (De53

Income Taxes Income Taxes (Details 6) $ in Millions	12 Months Ended
	Jun. 30, 2017USD ($)
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Limitations on Use	June 2022 to June 2037
Operating Loss Carryforwards	$ 19
Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Limitations on Use	December 2028; June 2031 to June 2036
Operating Loss Carryforwards	$ 15

Income Taxes (Details Textual)

Income Taxes (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Income (Loss) from Continuing Operations Attributable to Noncontrolling Interest	$ 0.3	$ 3.3	$ 19.1
Unremitted earnings	1
Liability for Uncertain Tax Positions, Noncurrent	$ 0.6

Contingencies (Details Textual)

Contingencies (Details Textual) - USD ($) $ in Millions	Jun. 30, 2017	Jun. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
Claims related to unapproved change orders	$ 11	$ 10.3

Operating Leases (Details Textu

Operating Leases (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Leases [Abstract]
Future minimum operating lease payable, in total	$ 36
Minimum operating lease payable, Fiscal 2018	7.5
Minimum operating lease payable, Fiscal 2019	6.3
Minimum operating lease payable, Fiscal 2020	5
Minimum operating lease payable, Fiscal 2021	4.4
Minimum operating lease payable, Fiscal 2022	2.6
Minimum operating lease payable, Thereafter	10.1
Operating lease expense	$ 7.9	$ 6.6	$ 6.7

Stockholders' Equity (Details T

Stockholders' Equity (Details Textual) $ in Thousands	12 Months Ended
	Jun. 30, 2017USD ($)shares	Jun. 30, 2016USD ($)shares	Jun. 30, 2015USD ($)
Equity, Class of Treasury Stock [Line Items]
Preferred stock shares authorized	5,000,000	5,000,000
Preferred stock shares issued	0	0
Preferred stock shares outstanding	0	0
Annual maximum purchases authorized under stock buyback program | $	$ 25,000
Cash Dividend and Stock Repurchase Restriction | $	$ 5,000
Leverage Ratio Required to Repurchase Common Stock or Pay Cash Dividends, Maximum	2.50
Leverage Ratio Required to Repurchase Common Stock or Pay Cash Dividends, Minimum	1
Payments for Repurchase of Common Stock | $	$ 0	$ (10,461)	$ (5,000)
Treasury stock, shares	1,287,655	1,447,394

Stock-Based Compensation (Detai

Stock-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Stock option activity and related information
Number of options outstanding at June 30, 2016	122,063
Number of options granted	0
Number of options exercised	(24,813)	(68,037)	(55,200)
Number of options cancelled	0
Number of options outstanding at June 30, 2017	97,250	122,063
Number of options vested or expected to vest at June 30, 2017	97,250
Number of options exercisable at June 30, 2017	97,250
Weighted average remaining contractual life	5 years 3 months	5 years 3 months
Weighted average remaining contractual life vested or expected to vest at June 30, 2017	5 years 3 months
Weighted average remaining contractual life exercisable at June 30, 2017	5 years 3 months
Weighted average exercise price at June 30, 2016	$ 10.19
Weighted average exercise price granted	0
Weighted average exercise price exercised	10.19
Weighted average exercise price cancelled	0
Weighted average exercise price at June 30, 2017	10.19	$ 10.19
Weighted average exercise price vested or expected to vest at June 30, 2017	10.19
Weighted average exercise price exercisable at June 30, 2017	$ 10.19
Aggregate intrinsic value outstanding at June 30, 2016	$ 0	$ 769
Aggregate intrinsic value exercised	268	700	$ 700
Aggregate intrinsic value outstanding at June 30, 2017	0	$ 769
Aggregate intrinsic value vested or expected to be vest at June 30, 2017	0
Aggregate intrinsic value exercisable at June 30, 2017	$ 0

Stock-Based Compensation (Det59

Stock-Based Compensation (Details 2) - $ / shares	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Stock options information
Stock options outstanding, option outstanding	97,250	122,063
Stock options outstanding weighted average remaining contractual life	5 years 3 months	5 years 3 months
Stock options exercisable option outstanding	97,250
Stock options exercisable weighted average exercise price	$ 10.19
Stock options exercisable weighted average remaining contractual life	5 years 3 months

Stock-Based Compensation (Det60

Stock-Based Compensation (Details 3)	12 Months Ended
	Jun. 30, 2017$ / sharesshares
Nonvested deferred share activity
Nonvested shares at June 30, 2016 | shares	791,995
Shares granted | shares	516,969
Performance shares awarded in excess of target | shares	88,523
Shares vested and released | shares	(396,530)
Shares cancelled | shares	(5,604)
Nonvested shares at June 30, 2017 | shares	995,353
Weighted average grant date fair value per share at June 30, 2016 | $ / shares	$ 21.45
Weighted average grant date fair value per share granted | $ / shares	19.80
Weighted average grant date fair value per performance shares | $ / shares	18.90
Weighted average grant date fair value per share vested and released | $ / shares	18.24
Weighted average grant date fair value per share cancelled | $ / shares	19.70
Weighted average grant date fair value per share at June 30, 2017 | $ / shares	$ 21.65

Stock-Based Compensation (Det61

Stock-Based Compensation (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 7,461	$ 6,317	$ 6,302
Unrecognized stock-based compensation expense	$ 11,900
Weighted average period	1 year 9 months
Stock based compensation expense recognized tax	$ 500	3,200	2,500
Common stock grant expiration term	10 years
Total intrinsic value of stock option	$ 268	$ 700	$ 700
Vesting period	3 years
Description of vesting period of director awards	3 years
Deferred shares granted		370,490	242,649
Average grant date fair value		$ 20.77	$ 29.31
Deferred shares vested and released	396,530	631,443	326,763
Weighted average fair value	$ 18.24	$ 22.34	$ 23.93
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Method Used	Monte Carlo model
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Method Number of Simulations Used	100,000
Employee Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, equal annual installments	1 year
Employee Award [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
Market Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pro-rate of original awards, minimum	0.00%
Pro-rate of original awards maximum	200.00%
Vest in 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum threshold shares scheduled to vest for performance based shares	80,000
Vest in 2019 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum threshold shares scheduled to vest for performance based shares	127,000
Vest in 2020 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum threshold shares scheduled to vest for performance based shares	183,000
Matrix Service Company 2016 Stock and Incentive Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share awards authorized	1,800,000
Share awards grant	1,716,934

Earnings per Common Share (Deta

Earnings per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Basic EPS:
Net income	$ (954)	$ (13,821)	$ 5,250	$ 9,342	$ 9,134	$ 4,357	$ 5,431	$ 9,941	$ (183)	$ 28,863	$ 17,157
Weighted average shares outstanding									26,533	26,597	26,603
Basic EPS (in dollars per share)	$ (0.04)	$ (0.52)	$ 0.20	$ 0.35	$ 0.35	$ 0.16	$ 0.20	$ 0.38	$ (0.01)	$ 1.09	$ 0.64
Diluted EPS:
Weighted average shares outstanding									26,533	26,597	26,603
Dilutive stock options									0	68	110
Dilutive nonvested deferred shares									0	435	464
Diluted weighted average shares									26,533	27,100	27,177
Diluted EPS (in dollars per share)	$ (0.04)	$ (0.52)	$ 0.20	$ 0.35	$ 0.34	$ 0.16	$ 0.20	$ 0.37	$ (0.01)	$ 1.07	$ 0.63

Earnings per Common Share (De63

Earnings per Common Share (Details 1) - shares shares in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Antidilutive Securities Excluded From Computation Of Diluted Earnings Per Share
Antidilutive securities	473	56	148
Stock Options [Member]
Antidilutive Securities Excluded From Computation Of Diluted Earnings Per Share
Antidilutive securities	43	0	0
Nonvested Deferred Shares [Member]
Antidilutive Securities Excluded From Computation Of Diluted Earnings Per Share
Antidilutive securities	430	56	148

Employee Benefit Plans (Details

Employee Benefit Plans (Details) - USD ($)	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Multiemployer Pension Plans
Total contributions made	$ 48,709	$ 46,011	$ 54,990
Contributions to other multiemployer plans	$ 20,374	$ 16,054	22,282
Boilermaker-Blacksmith National Pension Trust [Member]
Multiemployer Plans [Line Items]
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date, Description	Described below (1)
Multiemployer Pension Plans
EIN/Pension Plan Number	48-6168020/001
Multiemployer Plans, Certified Zone Status, Description	Described below (2)	Described below (2)
FIP/RP Status Pending or Implemented	Implemented
Total contributions made	$ 7,098	$ 7,658	8,330
Multiemployer Plan, Surcharge	Described below (2)
Joint Pension Fund Local Union One Six Four Ibew [Member]
Multiemployer Pension Plans
EIN/Pension Plan Number	22-6031199/001
Multiemployer Plans, Certified Zone Status, Description	Described below (2)	Described below (2)
FIP/RP Status Pending or Implemented	Implemented
Total contributions made	$ 2,709	$ 2,635	3,026
Multiemployer Plan, Surcharge	Described below (2)
Expiration Date of Collective-Bargaining Agreement	May 31, 2021
Joint Pension Fund Local Union Number One Zero Two [Member] [Domain]
Multiemployer Pension Plans
EIN/Pension Plan Number	22-1615726/001
Pension Protection Act Zone Status	Green	Green
FIP/RP Status Pending or Implemented	NA
Total contributions made	$ 2,392	$ 3,063	2,395
Surcharge Imposed	No
Expiration Date of Collective-Bargaining Agreement	May 31, 2019
IBEW Local Four Five Six Pension Plan [Member] [Domain]
Multiemployer Pension Plans
EIN/Pension Plan Number	22-6238995/001
Pension Protection Act Zone Status	Green	Green
FIP/RP Status Pending or Implemented	NA
Total contributions made	$ 2,777	$ 1,168	788
Surcharge Imposed	No
Expiration Date of Collective-Bargaining Agreement	Dec. 3, 2017
Local 351 IBEW Pension Plan [Member]
Multiemployer Pension Plans
EIN/Pension Plan Number	22-3417366/001
Multiemployer Plans, Certified Zone Status, Description	Green	Green
FIP/RP Status Pending or Implemented	Implemented
Total contributions made	$ 2,796	$ 5,018	2,608
Multiemployer Plan, Surcharge	No
Expiration Date of Collective-Bargaining Agreement	Sep. 30, 2017
Steamfitters Local Union Number Four Two Zero Pension Plan [Member] [Domain]
Multiemployer Pension Plans
EIN/Pension Plan Number	23-2004424/001
Pension Protection Act Zone Status	Red	Red
FIP/RP Status Pending or Implemented	Implemented
Total contributions made	$ 2,234	$ 1,265	937
Surcharge Imposed	Yes
Expiration Date of Collective-Bargaining Agreement	Apr. 30, 2020
IBEW Local Union Nine Eight Pension Plan [Member]
Multiemployer Pension Plans
EIN/Pension Plan Number	23-1990722/001
Multiemployer Plans, Certified Zone Status, Description	Described below (2)	Described below (2)
FIP/RP Status Pending or Implemented	Implemented
Total contributions made	$ 1,519	$ 1,653	2,768
Multiemployer Plan, Surcharge	Described below (2)
Expiration Date of Collective-Bargaining Agreement	Apr. 28, 2018
Indiana Laborers Pension Fund [Domain]
Multiemployer Pension Plans
EIN/Pension Plan Number	35-6027150/001
Multiemployer Plans, Certified Zone Status, Description	Described below (2)	Described below (2)
FIP/RP Status Pending or Implemented	Implemented
Total contributions made	$ 2,458	$ 2,320	2,519
Multiemployer Plan, Surcharge	Described below (2)
Expiration Date of Collective-Bargaining Agreement	May 31, 2018
Ironworkers Mid-America Pension Plan [Member]
Multiemployer Pension Plans
EIN/Pension Plan Number	36-6488227/001
Pension Protection Act Zone Status	Green	Green
FIP/RP Status Pending or Implemented	NA
Total contributions made	$ 1,785	$ 2,248	2,605
Surcharge Imposed	No
Expiration Date of Collective-Bargaining Agreement	May 31, 2019
Plumbers and Pipefitters Local Union Seven Four Pension Fund [Member]
Multiemployer Pension Plans
EIN/Pension Plan Number	51-6015925/001
Pension Protection Act Zone Status	Yellow	Yellow
FIP/RP Status Pending or Implemented	Implemented
Total contributions made	$ 4	$ 552	4,473
Surcharge Imposed	No
Expiration Date of Collective-Bargaining Agreement	Jun. 15, 2018
Pipefitters Retirement Fund Local Five Nine Seven [Member]
Multiemployer Pension Plans
EIN/Pension Plan Number	62-6105084/001
Pension Protection Act Zone Status	Green	Green
FIP/RP Status Pending or Implemented	NA
Total contributions made	$ 2,563	$ 2,377	$ 2,259
Surcharge Imposed	No
Expiration Date of Collective-Bargaining Agreement	May 31, 2018

Employee Benefit Plans (Detai65

Employee Benefit Plans (Details Textual) - USD ($)	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Employee Benefit Plans (Textual) [Abstract]
Percentage of limitation on pretax compensation	25.00%
Company match of first 3% of employee contributions	100.00%
Percentage of employee contribution for first half	3.00%
Employee contribution for next 2%	50.00%
Percentage of employee contribution for next half	2.00%
Contribution made by company	$ 5,500,000	$ 5,000,000	$ 4,900,000
Employee share purchase limit aggregate market value	$ 60,000
Shares available at ESPP	1,000,000
Employee Stock Purchase Plan, Termination Date	Jan. 2, 2021
Shares issued under ESPP	16,609	17,304	13,243
Zone Red [Member]
Multiemployer Plans [Line Items]
Percentage of plan funded	65.00%
Description of plans funded	less than 65 percent
Zone Yellow [Member]
Multiemployer Plans [Line Items]
Percentage of plan funded	80.00%
Description of plans funded	less than 80 percent
Zone Green [Member]
Multiemployer Plans [Line Items]
Percentage of plan funded	80.00%
Description of plans funded	at least 80 percent

Segment Information (Details)

Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Results of Operations
Gross revenues									$ 1,207,510	$ 1,316,466	$ 1,354,230
Less: Inter-segment revenues									1,197,509	1,311,917	1,343,135
Revenues									1,197,509	1,311,917	1,343,135
Gross profit	$ 23,127	$ (2,614)	$ 28,212	$ 32,278	$ 34,099	$ 27,303	$ 30,005	$ 34,584	81,003	125,991	87,370
Operating income (loss)	3,531	$ (21,210)	$ 8,237	$ 14,301	14,499	$ 6,347	$ 4,935	$ 15,101	4,859	40,882	8,802
Segment assets	586,030				564,967				586,030	564,967	561,689
Capital expenditures									11,908	13,939	15,773
Depreciation and amortization									21,602	21,441	23,480
Electrical Infrastructure [Member]
Results of Operations
Gross revenues									373,384	349,011	257,930
Less: Inter-segment revenues									373,384	349,011	257,930
Revenues									373,384	349,011	257,930
Gross profit									7,137	29,301	(31,444)
Operating income (loss)									(8,309)	11,144	(44,293)
Segment assets	183,351				135,298				183,351	135,298	129,725
Capital expenditures									1,390	1,611	579
Depreciation and amortization									5,198	5,008	4,915
Oil Gas & Chemical [Member]
Results of Operations
Gross revenues									247,423	252,973	310,826
Less: Inter-segment revenues									240,523	249,795	305,360
Revenues									240,523	249,795	305,360
Gross profit									12,675	18,553	25,394
Operating income (loss)									(8,783)	(3,503)	7,064
Segment assets	129,177				91,350				129,177	91,350	108,960
Capital expenditures									829	1,481	3,858
Depreciation and amortization									6,299	4,811	4,772
Storage Solutions [Member]
Results of Operations
Gross revenues									483,254	564,738	504,155
Less: Inter-segment revenues									481,696	563,512	503,123
Revenues									481,696	563,512	503,123
Gross profit									55,651	67,843	58,085
Operating income (loss)									22,928	33,449	29,069
Segment assets	166,742				201,875				166,742	201,875	172,857
Capital expenditures									2,017	3,882	2,396
Depreciation and amortization									7,277	8,124	7,298
Industrial [Member]
Results of Operations
Gross revenues									103,449	149,744	281,319
Less: Inter-segment revenues									101,906	149,599	276,722
Revenues									101,906	149,599	276,722
Gross profit									5,540	10,294	35,335
Operating income (loss)									(977)	(208)	16,962
Segment assets	53,754				67,569				53,754	67,569	102,761
Capital expenditures									38	104	1,139
Depreciation and amortization									2,828	3,498	6,495
Unallocated Corporate [Member]
Results of Operations
Segment assets	$ 53,006				$ 68,875				53,006	68,875	47,386
Capital expenditures									7,634	6,861	7,801
Intersegment Eliminations [Member]
Results of Operations
Less: Inter-segment revenues									10,001	4,549	11,095
Revenues									10,001	4,549	11,095
Intersegment Eliminations [Member] | Electrical Infrastructure [Member]
Results of Operations
Less: Inter-segment revenues									0	0	0
Revenues									0	0	0
Intersegment Eliminations [Member] | Oil Gas & Chemical [Member]
Results of Operations
Less: Inter-segment revenues									6,900	3,178	5,466
Revenues									6,900	3,178	5,466
Intersegment Eliminations [Member] | Storage Solutions [Member]
Results of Operations
Less: Inter-segment revenues									1,558	1,226	1,032
Revenues									1,558	1,226	1,032
Intersegment Eliminations [Member] | Industrial [Member]
Results of Operations
Less: Inter-segment revenues									1,543	145	4,597
Revenues									$ 1,543	$ 145	$ 4,597

Segment Information (Details 1)

Segment Information (Details 1) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Summary of revenues and long lived assets according to geographic areas
Revenues	$ 291,836	$ 251,237	$ 312,655	$ 341,781	$ 359,635	$ 309,422	$ 323,529	$ 319,331	$ 1,197,509	$ 1,311,917	$ 1,343,135
Long-Lived Assets	227,400				189,521				227,400	189,521	188,218
UNITED STATES
Summary of revenues and long lived assets according to geographic areas
Revenues									961,049	1,127,893	1,205,713
Long-Lived Assets	193,164				158,970				193,164	158,970	166,132
CANADA
Summary of revenues and long lived assets according to geographic areas
Revenues									228,625	178,603	137,422
Long-Lived Assets	21,419				19,915				21,419	19,915	22,086
Other international [Member]
Summary of revenues and long lived assets according to geographic areas
Revenues									7,835	5,421	0
Long-Lived Assets	$ 12,817				$ 10,636				$ 12,817	$ 10,636	$ 0

Segment Information (Details Te

Segment Information (Details Textual)	12 Months Ended
	Jun. 30, 2017Rate	Jun. 30, 2016Rate	Jun. 30, 2015Rate
Customer One [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	19.50%	14.80%	12.30%
Customer Two [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	15.30%	10.60%	7.00%
Customer Three [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	5.20%	8.30%	6.50%
Customer Four [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	4.20%	4.40%	5.70%
Customer Five [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	4.00%	4.20%	4.80%
Customer Six [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	2.70%	3.90%	4.00%
Customer Seven [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	2.20%	3.80%	3.90%
Customer Eight [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue		3.40%	3.10%
Customer Nine [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue		2.30%	2.80%
Customer Ten [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue		2.10%	2.80%
Customer Eleven [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue		1.60%	2.40%
Electrical Infrastructure [Member] | Customer One [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	38.90%	0.00%
Electrical Infrastructure [Member] | Customer Two [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	46.00%	0.00%	0.00%
Electrical Infrastructure [Member] | Customer Three [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	0.00%	12.70%
Electrical Infrastructure [Member] | Customer Four [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	16.60%	0.00%
Electrical Infrastructure [Member] | Customer Five [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	12.70%	0.00%	25.10%
Electrical Infrastructure [Member] | Customer Six [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	0.00%	0.00%
Electrical Infrastructure [Member] | Customer Seven [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	14.40%	0.00%
Electrical Infrastructure [Member] | Customer Eight [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue		12.70%	16.30%
Electrical Infrastructure [Member] | Customer Nine [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue		0.00%	14.70%
Electrical Infrastructure [Member] | Customer Ten [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue		0.00%	0.00%
Electrical Infrastructure [Member] | Customer Eleven [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue		0.00%	12.70%
Oil Gas & Chemical [Member] | Customer One [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	0.00%	0.00%
Oil Gas & Chemical [Member] | Customer Two [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	0.00%	0.00%
Oil Gas & Chemical [Member] | Customer Three [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	25.80%	0.00%	0.00%
Oil Gas & Chemical [Member] | Customer Four [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	20.70%	0.00%	0.00%
Oil Gas & Chemical [Member] | Customer Five [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	0.00%	0.00%
Oil Gas & Chemical [Member] | Customer Six [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	20.20%	17.70%
Oil Gas & Chemical [Member] | Customer Seven [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	0.00%	0.00%
Oil Gas & Chemical [Member] | Customer Eight [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue		0.00%	0.00%
Oil Gas & Chemical [Member] | Customer Nine [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue		0.00%	0.00%
Oil Gas & Chemical [Member] | Customer Ten [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue		11.20%	12.30%
Oil Gas & Chemical [Member] | Customer Eleven [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue		0.00%	0.00%
Storage Solutions [Member] | Customer One [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	48.50%	10.20%	33.00%
Storage Solutions [Member] | Customer Two [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	2.40%	24.70%	0.00%
Storage Solutions [Member] | Customer Three [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	19.30%	10.90%
Storage Solutions [Member] | Customer Four [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	0.00%	0.00%
Storage Solutions [Member] | Customer Five [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	0.00%	0.00%
Storage Solutions [Member] | Customer Six [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	0.00%	0.00%
Storage Solutions [Member] | Customer Seven [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	0.00%	0.00%
Storage Solutions [Member] | Customer Eight [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue		0.00%	0.00%
Storage Solutions [Member] | Customer Nine [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue		0.00%	0.00%
Storage Solutions [Member] | Customer Ten [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue		0.00%	0.00%
Storage Solutions [Member] | Customer Eleven [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue		0.00%	0.00%
Industrial [Member] | Customer One [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	0.00%	0.00%
Industrial [Member] | Customer Two [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	0.00%	34.00%
Industrial [Member] | Customer Three [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	0.00%	0.00%
Industrial [Member] | Customer Four [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	0.00%	27.60%
Industrial [Member] | Customer Five [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	36.90%	0.00%
Industrial [Member] | Customer Six [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	31.70%	0.00%	0.00%
Industrial [Member] | Customer Seven [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	25.80%	0.00%	19.00%
Industrial [Member] | Customer Eight [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue		0.00%	0.00%
Industrial [Member] | Customer Nine [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue		20.10%	0.00%
Industrial [Member] | Customer Ten [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue		0.00%	0.00%
Industrial [Member] | Customer Eleven [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue		14.00%	0.00%

Quarterly Financial Data (Una69

Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Quarterly Financial Information Disclosure [Abstract]
Sales Revenue, Services, Net	$ 291,836	$ 251,237	$ 312,655	$ 341,781	$ 359,635	$ 309,422	$ 323,529	$ 319,331	$ 1,197,509	$ 1,311,917	$ 1,343,135
Gross profit	23,127	(2,614)	28,212	32,278	34,099	27,303	30,005	34,584	81,003	125,991	87,370
Operating income	3,531	(21,210)	8,237	14,301	14,499	6,347	4,935	15,101	4,859	40,882	8,802
Net income	$ (954)	$ (13,821)	$ 5,250	$ 9,342	$ 9,134	$ 4,357	$ 5,431	$ 9,941	$ (183)	$ 28,863	$ 17,157
Basic earnings per common share (in dollars per share)	$ (0.04)	$ (0.52)	$ 0.20	$ 0.35	$ 0.35	$ 0.16	$ 0.20	$ 0.38	$ (0.01)	$ 1.09	$ 0.64
Diluted earnings per common share (in dollars per share)	$ (0.04)	$ (0.52)	$ 0.20	$ 0.35	$ 0.34	$ 0.16	$ 0.20	$ 0.37	$ (0.01)	$ 1.07	$ 0.63

Valuation and Qualifying Acco70

Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 8,827	$ 676	$ 294
Charged to Costs and Expenses	3,043	6,376	447
Charged to Other Accounts	0	1,808	0
Deductions	(264)	(33)	(65)
Balance at End of Period	11,606	8,827	676
Allowance for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	8,403	561	204
Charged to Costs and Expenses	1,748	6,065	422
Charged to Other Accounts	0	1,808	0
Deductions	(264)	(31)	(65)
Balance at End of Period	9,887	8,403	561
Valuation Allowance of Deferred Tax Assets [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	424	115	90
Charged to Costs and Expenses	1,295	311	25
Charged to Other Accounts	0	0	0
Deductions	0	(2)	0
Balance at End of Period	$ 1,719	$ 424	$ 115