Matrix Service (MTRX) 10-K 11 Sep 15 2015 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2015	Aug. 31, 2015	Dec. 31, 2014
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, 2015
Amendment Flag	false
Document Fiscal Year Focus	2,015
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			$ 589
Entity Common Stock, Shares Outstanding		26,381,791

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Income Statement [Abstract]
Revenues	$ 1,343,135	$ 1,263,089	$ 892,574
Cost of revenues	1,255,765	1,126,616	797,872
Gross profit	87,370	136,473	94,702
Selling, general and administrative expenses	78,568	77,866	57,988
Operating income	8,802	58,607	36,714
Other income (expense):
Interest expense	(1,236)	(1,436)	(800)
Interest income	468	112	32
Other	158	(472)	(30)
Income before income tax expense	8,192	56,811	35,916
Provision for federal, state and foreign income taxes	10,090	19,934	11,908
Net income (loss)	(1,898)	36,877	24,008
Less: Net income (loss) attributable to noncontrolling interest	(19,055)	1,067	0
Net income attributable to Matrix Service Company	$ 17,157	$ 35,810	$ 24,008
Basic earnings per common share (in dollars per share)	$ 0.64	$ 1.36	$ 0.92
Diluted earnings per common share (in dollars per share)	$ 0.63	$ 1.33	$ 0.91
Weighted average common shares outstanding:
Basic (in shares)	26,603	26,288	25,962
Diluted (in shares)	27,177	26,976	26,358

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Other comprehensive income (loss), net of tax:
Net income	$ (1,898)	$ 36,877	$ 24,008
Foreign currency translation adjustments (net of tax of $606, $116 and $190)	(5,744)	(409)	(544)
Comprehensive income (loss)	(7,642)	36,468	23,464
Less: Comprehensive income (loss) attributable to noncontrolling interest	(19,055)	1,067	0
Comprehensive income attributable to Matrix Service Company	$ 11,413	$ 35,401	$ 23,464

Consolidated Statements of Com4

Consolidated Statements of Comprehensive Income (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]
Foreign currency translation adjustments, tax effect	$ 606	$ 116	$ 190

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 30, 2014
Current assets:
Cash and cash equivalents	$ 79,239	$ 77,115
Accounts receivable, less allowances (2015 - $561 ; 2014 - $204)	199,149	204,692
Costs and estimated earnings in excess of billings on uncompleted contracts	86,071	73,008
Inventories	2,773	3,045
Income taxes receivable	579	2,797
Deferred income taxes	8,298	5,994
Other current assets	5,660	8,897
Total current assets	381,769	375,548
Property, plant and equipment, at cost:
Land and buildings	32,746	31,737
Construction equipment	87,561	82,745
Transportation equipment	47,468	42,087
Office equipment and software	28,874	26,026
Construction in progress	5,196	9,892
Property, plant and equipment at cost, gross	201,845	192,487
Accumulated depreciation	(116,782)	(103,315)
Property, plant and equipment at cost, net	85,063	89,172
Goodwill	71,518	69,837
Other intangible assets	23,961	28,676
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent	2,073	0
Other assets	3,947	5,699
Total assets	568,331	568,932
Current liabilities:
Accounts payable	125,792	111,863
Billings on uncompleted contracts in excess of costs and estimated earnings	96,704	108,440
Accrued wages and benefits	26,725	36,226
Accrued insurance	8,100	8,605
Accrued Income Taxes, Current	3,268	481
Deferred Tax Liabilities, Net, Current	473	0
Other accrued expenses	6,498	4,246
Total current liabilities	267,560	269,861
Deferred income taxes	7,413	5,167
Borrowings under senior credit facility	8,804	11,621
Total liabilities	$ 283,777	$ 286,649
Commitments and contingencies
Stockholders' equity:
Common stock—$.01 par value; 60,000,000 shares authorized; 27,888,217 shares issued as of June 30, 2015 and June 30, 2014; 26,440,823 and 26,434,447 shares outstanding as of June 30, 2015 and June 30, 2014	$ 279	$ 279
Additional paid-in capital	123,038	119,777
Retained earnings	194,394	177,237
Accumulated other comprehensive loss	(5,926)	(182)
Total stockholders' equity before treasury stock	311,785	297,111
Less treasury stock, at cost — 1,447,394 and 1,453,770 shares as of June 30, 2015 and June 30, 2014	(18,489)	(16,595)
Stockholders' Equity Attributable to Parent	293,296	280,516
Noncontrolling interest	(8,742)	1,767
Total Matrix Service Company stockholders' equity	284,554	282,283
Total liabilities and stockholders' equity	$ 568,331	$ 568,932

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 30, 2014
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 561	$ 204
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	60,000,000	60,000,000
Common stock, shares issued	27,888,217	27,888,217
Treasury stock, shares	1,447,394	1,453,770

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Operating activities:
Net income	$ (1,898)	$ 36,877	$ 24,008
Adjustments to reconcile net income to net cash provided by operating activities, net of effects of acquisitions :
Depreciation and amortization	23,480	18,518	12,782
Stock-based compensation expense	6,302	5,688	3,831
Deferred income taxes	(1,052)	(3,852)	1,932
Allowance for uncollectible accounts	357	(159)	714
Impairment of Intangible Assets, Finite-lived	0	0	255
(Gain) loss on sale of property, plant and equipment	(252)	109	(1)
Other	238	208	163
Excess tax benefit of exercised stock options and vesting of deferred shares	1,802	1,730	37
Changes in operating assets and liabilities increasing (decreasing) cash, net of effects from acquisitions:
Accounts receivable	6,831	(31,395)	(32,408)
Costs and estimated earnings in excess of billings on uncompleted contracts	(13,063)	13,540	(5,211)
Inventories	272	(11)	(1,394)
Other assets	11,558	351	(2,157)
Accounts payable	12,957	29,234	19,256
Billings on uncompleted contracts in excess of costs and estimated earnings	(11,736)	3,142	32,555
Accrued expenses	(7,754)	6,468	2,796
Net cash provided by operating activities	24,438	76,988	57,084
Investing activities:
Acquisition of property, plant and equipment	(15,773)	(23,589)	(23,231)
Acquisition	(5,551)	(51,607)	(9,394)
Acquisition related adjustment	219
Proceeds from asset sales	750	553	186
Net cash used for investing activities	(20,574)	(74,643)	(32,439)
Financing activities:
Proceeds from Noncontrolling Interests	8,546	0	0
Exercise of stock options	493	1,175	875
Capital lease payments	0	0	(42)
Excess tax benefit of exercised stock options and vesting of deferred shares	1,802	1,730	37
Advances under credit agreement	11,165	87,826	25,565
Repayments of advances under credit agreement	(13,982)	(76,205)	(25,565)
Payment of debt amendment fees	0	(657)	0
Treasury shares sold to Employee Stock Purchase Plan	298	136	54
Open market purchase of treasury shares	(5,000)	0	0
Other treasury share purchases	(2,528)	(1,776)	(1,162)
Net cash used by financing activities	794	12,229	(238)
Effect of exchange rate changes on cash	(2,534)	(1,209)	(383)
Net increase (decrease) in cash and cash equivalents	2,124	13,365	24,024
Cash and cash equivalents, beginning of period	77,115	63,750	39,726
Cash and cash equivalents, end of period	79,239	77,115	63,750
Other cash flow information:
Income taxes	6,960	19,160	12,242
Interest	1,281	1,224	610
Non-cash investing:
Purchases of property, plant and equipment on account	$ 439	$ 527	$ 1,146

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, 2012	$ 211,097	$ 279	$ 116,693	$ 117,419	$ (24,065)	$ 771	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	24,008			24,008
Other comprehensive loss	(544)					(544)
Exercise of stock options	875		(662)	0	1,537
Tax effect of exercised stock options and vesting of deferred shares	3		3
Issuance of deferred shares			(1,667)		1,667
Treasury Shares Sold to Employee Stock Purchase Plan (Note 12)	54		(8)		62
Other treasury share purchases	(1,162)				(1,162)
Stock-based compensation expense	3,831		3,831
Balances, ending at Jun. 30, 2013	238,162	279	118,190	141,427	(21,961)	227	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	36,877			35,810			1,067
Other comprehensive loss	(409)					(409)
Consolidated joint venture included in acquisition (Note 2)	700						700
Exercise of stock options	1,175		(1,190)	0	2,365
Tax effect of exercised stock options and vesting of deferred shares	1,730		1,730
Issuance of deferred shares			(4,680)		4,680
Treasury Shares Sold to Employee Stock Purchase Plan (Note 12)	136		39		97
Other treasury share purchases	(1,776)				(1,776)
Stock-based compensation expense	5,688		5,688
Balances, ending at Jun. 30, 2014	282,283	279	119,777	177,237	(16,595)	(182)	1,767
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(1,898)			17,157			(19,055)
Noncontrolling Interest, Increase from Subsidiary Equity Issuance	8,546						8,546
Other comprehensive loss	(5,744)					(5,744)
Exercise of stock options	493		(275)		768
Tax effect of exercised stock options and vesting of deferred shares	1,802		1,802
Issuance of deferred shares			(4,702)		4,702
Treasury Shares Sold to Employee Stock Purchase Plan (Note 12)	298		134		164
Open market purchase of treasury shares	5,000				5,000
Other treasury share purchases	(2,528)				(2,528)
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)

Consolidated Statements of Cha9

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - shares	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Exercise of stock options, shares	55,200	134,450	97,840
Issuance of deferred shares, shares	326,763	266,209	367,449
Employee Stock Purchase Plans, shares	13,243	5,440	4,452
Open market purchase of treasury shares, shares	283,772		0
Other treasury share purchases	105,058	80,096	107,344

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Jun. 30, 2015
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Organization and Basis of Presentation The consolidated financial statements 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 and Canada. The Company’s reportable segments are Electrical Infrastructure, Oil Gas & Chemical, Storage Solutions and Industrial. Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States 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 profits 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 expensed as incurred. 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 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, 2015 and $0.3 million of restricted cash at June 30, 2014 . We have cash on deposit at June 30, 2015 with banks in the United States and Canada in excess of Federal Deposit Insurance Corporation ("FDIC") or Canada Deposit Insurance Corporation ("CDIC") insurance limits, respectively. 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 Accounts receivable at June 30, 2015 and June 30, 2014 included retentions to be collected within one year of $25.2 million and $30.0 million , respectively. Contract retentions collectible beyond one year are included in Other Assets in the Consolidated Balance Sheets and totaled $2.8 million at June 30, 2015 and $4.3 million at June 30, 2014 . Accounts payable included retentions of $10.2 million at June 30, 2015 and $10.4 million at June 30, 2014 . 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 are stated at the lower of cost or net realizable value. Cost is determined primarily using the average cost method. 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. Internal-Use Computer Software We expense or capitalize costs associated with the development of internal-use software as follows: Preliminary Project Stage : Both internal and external costs incurred during this stage are expensed as incurred. Application Development Stage : Both internal and external costs incurred to purchase or develop computer software are capitalized after the preliminary project stage is completed and management authorizes the computer software project. However, training costs and data conversion costs, which includes purging or cleansing of existing data, reconciling or balancing of data, are expensed as incurred. Post-Implementation/Operation Stage : All training costs and maintenance costs incurred during this stage are expensed as incurred. Costs of upgrades and enhancements are capitalized if the expenditures will result in adding functionality to the software. Capitalized software costs are depreciated using the straight-line method over the estimated useful life of the related software, which may be up to ten years. 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. We perform our annual analysis during the fourth quarter of each fiscal year and in any other period in which indicators of impairment warrant additional analysis. Goodwill impairment reviews involve a two-step process. Goodwill is first evaluated for impairment by comparing management’s estimate of the fair value of a reporting unit with its carrying value, including goodwill. 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 and gross margins, estimated operating and interest expense, 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 indications obtained from market-based approaches. We compare market multiples derived from market prices of stock of companies that are engaged in a similar line of business to the corresponding measures of the Company. We also consider the combined carrying values of our reporting units to our market capitalization. If the carrying value of our reporting unit is higher than its fair value, there is an indication that impairment may exist and the second step must be performed to measure the amount of impairment. The amount of impairment is determined by comparing the implied fair value of the reporting unit's goodwill to the carrying value of the goodwill calculated in the same manner as if the reporting unit were being acquired in a business combination. If the implied fair value of goodwill is less than its carrying value, we would record an impairment charge for the difference. Other Intangible Assets Intangible assets that have finite useful lives are amortized by the straight-line method over their useful lives ranging from 1.5 to 15 years. Intangible assets that have indefinite useful lives are not amortized but are tested at least annually for impairment. Each reporting period, we evaluate the remaining useful lives of intangible assets not being amortized to determine whether facts and circumstances continue to support an indefinite useful life. Intangible assets are considered impaired if the fair value of the intangible asset is less than its net book value. 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, net of estimated forfeitures. 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 currency of the Company’s operations in Canada is the Canadian dollar. The assets and liabilities are translated at the year end exchange rate 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 (Topic 606), Revenue from Contracts with Customers On May 28, 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-09. The standard outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. The core principle of the revenue model is that “an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services.” The ASU also requires entities to disclose both quantitative and qualitative information that enables users of financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. The ASU’s disclosure requirements are significantly more comprehensive than those in existing revenue standards. The ASU applies to all contracts with customers except those that are within the scope of other topics in the FASB Accounting Standards Codification ("ASC"). In July 2015, the FASB deferred the effective date by one year. With the deferral, this ASU is now effective for annual reporting periods beginning after December 15, 2017, with early adoption now permitted. We expect to adopt this standard on July 1, 2018 and are currently evaluating its expected impact on our financial statements. Accounting Standards Update 2014-08 (Topics 205 and 360), Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity On April 10, 2014, the FASB issued ASU 2014-08, which amends the definition of a discontinued operation in ASC 205-20 and requires entities to provide additional disclosures about discontinued operations as well as disposal transactions that do not meet the discontinued-operations criteria. The ASU is effective prospectively for all disposals (except disposals classified as held for sale before the adoption date) or components initially classified as held for sale in periods beginning on or after December 15, 2014. The Company adopted this standard as of January 1, 2015. The adoption of this standard did not impact on our consolidated financial statements. Accounting Standards Update 2014-15 (Subtopic 205-40)—Presentation of Financial Statements—Going Concern : Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern On August 27, 2014, the FASB issued ASU 2014-15, which provides guidance on determining when and how reporting entities must disclose going-concern uncertainties in their financial statements. The new standard requires management to perform interim and annual assessments of an entity’s ability to continue as a going concern within one year of the date of issuance of the entity’s financial statements. Further, an entity must provide certain disclosures if there is “substantial doubt about the entity’s ability to continue as a going concern.” The FASB believes that requiring management to perform the assessment will enhance the timeliness, clarity, and consistency of related disclosures and improve convergence with international financial reporting standards ("IFRSs") (which emphasize management’s responsibility for performing the going-concern assessment). However, the time horizon for the assessment (look-forward period) and the disclosure thresholds under U.S. GAAP and IFRSs will continue to differ. The ASU is effective for annual periods ending after December 15, 2016, and interim periods thereafter; early adoption is permitted. We expect to adopt this standard in fiscal 2017.

Acquisitions

Acquisitions	12 Months Ended
	Jun. 30, 2015
Business Combinations [Abstract]
Acquisitions	Acquisitions 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 preliminary purchase price allocation: 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 The operating data related to this acquisition was not material. Purchase of Kvaerner North American Construction Effective as of December 21, 2013, the Company acquired 100% of the stock of Kvaerner North American Construction Ltd. and substantially all of the assets of Kvaerner North American Construction Inc,. together referenced as "KNAC". The businesses are now known as Matrix North American Construction Ltd. and Matrix North American Construction, Inc., together referenced as "Matrix NAC". Matrix NAC is a premier provider of maintenance and capital construction services to power generation, integrated iron and steel, and industrial process facilities. The acquisition significantly expanded the Company's presence in the Electrical Infrastructure and Industrial Segments, and to a lesser extent, the Oil Gas and Chemical segment. The Company purchased KNAC for $88.3 million The acquisition was funded through a combination of cash-on-hand and borrowings under our senior revolving credit facility. 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 final purchase price allocation (in thousands): Current assets $ 83,575 Property, plant and equipment 11,377 Goodwill 39,295 Other intangible assets 24,009 Total assets acquired 158,256 Current liabilities 68,115 Deferred income taxes 1,179 Noncontrolling interest of consolidated joint venture 700 Net assets acquired 88,262 Cash acquired 36,655 Net purchase price $ 51,607 Goodwill represents the excess of the purchase price over the fair value of the underlying net tangible and intangible assets. This acquisition generated $39.3 million of goodwill, of which $30.7 million is tax deductible. The equity in the consolidated joint venture represents the acquired equity in KVPB Power Partners. KVPB Power Partners was subsequently renamed MXPB Power Partners, which we refer to as the "acquired EPC joint venture project". The acquired EPC joint venture project was formed by KNAC and an engineering firm to engineer and construct a combined cycle power plant in Dover, Delaware. The Company holds a 65% voting and economic interest in the acquired EPC joint venture project. The total acquired equity of the acquired EPC joint venture project was $2.0 million of which the Company's portion was approximately $1.3 million and the other party's non-controlling portion was approximately $0.7 million . The Company incurred approximately $2.0 million of expenses related to the acquisition in the second quarter of fiscal 2014; therefore, such expenses are included in our results as selling, general and administrative costs for the year ended June 30, 2014 . The unaudited financial information in the table below summarizes the combined results of operations of Matrix Service Company and Matrix NAC for the for the twelve months ended June 30, 2014 and June 30, 2013 , on a pro forma basis, as though the companies had been combined as of July 1, 2012. The pro forma earnings for the twelve months ended June 30, 2014 and were adjusted to include incremental intangible amortization expense of $4.1 million and depreciation expense of $1.3 million . The pro forma earnings for the twelve months ended June 30, 2013 were adjusted to include incremental amortization expense of $4.1 million and depreciation expense of $1.3 million . Additionally, $0.6 million of income from a one-time KNAC tax settlement and $2.0 million of acquisition-related expenses were removed from the twelve months ended June 30, 2014 . The $2.0 million of acquisition-related expenses were included in the twelve months ended June 30, 2013 as if the acquisition occurred at July 1, 2012. 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, 2012 nor should it be taken as indicative of our future consolidated results of operations. Twelve Months Ended June 30, June 30, (In thousands, except per share data) Revenues $ 1,397,706 $ 1,096,267 Net income attributable to Matrix Service Company $ 38,786 $ 28,444 Basic earnings per common share $ 1.48 $ 1.10 Diluted earnings per common share $ 1.44 $ 1.08

Customer Contracts

Customer Contracts	12 Months Ended
	Jun. 30, 2015
Contractors [Abstract]
Customer Contracts	Customer 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 $ 1,633,780 $ 1,435,242 Billings on uncompleted contracts 1,644,413 1,470,674 $ (10,633 ) $ (35,432 ) Shown on balance sheet as: Costs and estimated earnings in excess of billings on uncompleted contracts $ 86,071 $ 73,008 Billings on uncompleted contracts in excess of costs and estimated earnings 96,704 108,440 $ (10,633 ) $ (35,432 ) Other In the twelve months 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, as described in Note 2 - Acquisitions. 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 the twelve months ended June 30, 2015 . The charge was a result of labor compression and productivity losses, as well as technical issues that created rework, installation and commissioning complexity, all of which pushed the completion date and project costs beyond the previous forecasts. The Company reached substantial completion in the fourth quarter of fiscal 2015 for this project; therefore, any future impact to earnings is not expected to be significant. In the twelve months ended June 30, 2014 , our results of operations were materially impacted by a charge resulting from a change in estimate on an aboveground storage tank project. The charge resulted in an $8.4 million decrease in operating income for the twelve months ended June 30, 2014 .

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Jun. 30, 2015
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) Goodwill $ 29,666 $ 8,088 $ 10,985 $ 7,097 $ 55,836 Cumulative impairment loss (17,653 ) (3,000 ) (922 ) (3,425 ) (25,000 ) Net balance at June 30, 2013 12,013 5,088 10,063 3,672 30,836 Purchase of Kvaerner North American Construction (Note 2) 31,259 5,855 — 1,962 39,076 Translation adjustment (29 ) — (36 ) (10 ) (75 ) 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 (1,044 ) — (363 ) (196 ) (1,603 ) Net balance at June 30, 2015 $ 42,374 $ 14,008 $ 9,664 $ 5,472 $ 71,518 The translation adjustments relate to the periodic translation of Canadian Dollar denominated goodwill recorded as a part of a prior Canadian acquisition as well as the periodic translation of the Canadian entity acquired with the purchase of Kvaerner North American Construction (Note 2) through June 30, 2015 . The cumulative impairment loss shown in the table above occurred as a result of the Company’s operating performance in fiscal 2005. Other Intangible Assets Information on the carrying value of other intangible assets is as follows: At June 30, 2015 Useful Life Gross Carrying Amount Accumulated Amortization Net Carrying Amount (Years) (In thousands) Intellectual property 6 to 15 $ 2,460 $ (1,086 ) $ 1,374 Customer based 1.5 to 15 27,837 (7,109 ) 20,728 Non-compete agreements 4 to 5 1,354 (802 ) 552 Trade names 3 to 5 1,615 (308 ) 1,307 Total amortizing intangibles 33,266 (9,305 ) 23,961 At June 30, 2014 Useful Life Gross Carrying Amount Accumulated Amortization Net Carrying Amount (Years) (In thousands) Intellectual property 6 to 15 $ 2,460 $ (920 ) $ 1,540 Customer based 1.5 to 15 27,662 (2,949 ) 24,713 Non-compete agreements 3 to 5 1,312 (471 ) 841 Trade name 5 165 (33 ) 132 Total amortizing intangibles 31,599 (4,373 ) 27,226 Trade name Indefinite 1,450 — 1,450 Total intangible assets $ 33,049 $ (4,373 ) $ 28,676 Each reporting period, the Company evaluates the remaining useful lives of intangible assets not being amortized to determine whether facts and circumstances continue to support an indefinite useful life. Based on this analysis, effective December 31, 2014, the Company redesignated a trade name with a value of $1.5 million from an indefinite lived to a definite lived intangible asset and assigned a useful life of three years. The change in designation was an impairment indicator. The Company conducted an impairment analysis and concluded that no impairment existed. Amortization expense totaled $5.0 million , $2.8 million , and $0.4 million in fiscal 2015 , 2014 , and 2013, respectively. We estimate that future amortization of other intangible assets will be as follows (in thousands): For year ending: June 30, 2016 $ 3,334 June 30, 2017 3,250 June 30, 2018 2,909 June 30, 2019 2,543 June 30, 2020 2,543 Thereafter 9,382 Total estimated amortization expense $ 23,961

Debt

Debt	12 Months Ended
	Jun. 30, 2015
Debt Disclosure [Abstract]
Debt	Debt The Company has a five-year, $200.0 million senior secured revolving credit facility under a credit agreement (the "Credit Agreement") that expires March 13, 2019 . Advances under the credit facility may be used for working capital, acquisitions, capital expenditures, issuance of letters of credit and other lawful corporate purposes. The Credit Agreement includes the following covenants and borrowing limitations: • Our Senior Leverage Ratio, as defined in the agreement, may not exceed 2.50 to 1.00 as of the end of each fiscal quarter. • We are required to maintain a Fixed Charge Coverage Ratio, as defined in the agreement, greater than or equal to 1.25 to 1.00 as of the end of each fiscal quarter. • Asset dispositions (other than inventory and obsolete or unneeded equipment disposed of in the ordinary course of business) are limited to $20.0 million per 12 -month period. Amounts borrowed under the Credit Agreement bear interest at LIBOR or an Alternate Base Rate, plus in each case, an additional margin based on the Senior Leverage Ratio. The additional margin on Alternate Base Rate and LIBOR-based loans ranges between 0.25% and 1.0% and between 1.25% and 2.0% on LIBOR-based loans. The Credit Agreement also permits us to borrow in Canadian dollars with a sublimit of U.S. $40.0 million . Amounts borrowed in Canadian dollars will bear interest either at the CDOR Rate, plus an additional margin based on the Senior Leverage Ratio ranging from 1.25% to 2.0% , or at the Canadian Prime Rate, plus an additional margin based on the Senior Leverage Ratio ranging from 1.75% to 2.5% . The CDOR Rate is equal to the sum of the annual rate of interest, which is the rate determined as being the arithmetic average of the quotations of all institutions listed in respect of the relevant CDOR interest period for Canadian Dollar denominated bankers’ acceptances, plus 0.1% . The Canadian Prime Rate is equal to the greater of (i) the rate of interest per annum most recently announced or established by JPMorgan Chase Bank, N.A., Toronto Branch as its reference rate in effect on such day for determining interest rates for Canadian Dollar denominated commercial loans in Canada and (ii) the CDOR Rate plus 1.0% . The Unused Credit Facility Fee is between 0.20% and 0.35% based on the Senior Leverage Ratio. Under our Credit Agreement, we may declare and pay dividends on our capital stock during any fiscal year up to an amount which, when added to all other dividends paid during such fiscal year, does not exceed 50% of our cumulative net income for such fiscal year to date. We currently have no future plans to pay cash dividends. The Credit Agreement includes a Senior Leverage Ratio covenant, which provides that Consolidated Funded Indebtedness, as of the end of any fiscal quarter, may not exceed 2.5 times Consolidated EBITDA, as defined in the Credit Agreement, over the previous four quarters. For the four quarters ended June 30, 2015 , Consolidated EBITDA, as defined in the Credit Agreement, was $58.0 million . Accordingly, at June 30, 2015 , there was a restriction on our ability to access the full amount of the credit facility. Consolidated Funded Indebtedness at June 30, 2015 was $42.4 million . Availability under the credit facility is as follows: June 30, June 30, (In thousands) Senior credit facility $ 200,000 $ 200,000 Capacity constraint due to the Senior Leverage Ratio 54,968 — Capacity under the credit facility 145,032 200,000 Letters of credit issued 40,587 23,017 Borrowings outstanding 8,804 11,621 Availability under the senior credit facility $ 95,641 $ 165,362 Outstanding borrowings at June 30, 2015 under our Credit Agreement were used for Canadian dollar advances required for short term working capital, including cross-border purchases of materials and services. The Company is in compliance with all other affirmative, negative, and financial covenants under the Credit Agreement.

Income Taxes

Income Taxes	12 Months Ended
	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The sources of pretax income are as follows: Twelve Months Ended June 30, June 30, June 30, (In thousands) Domestic $ (4,001 ) $ 60,129 $ 37,876 Foreign 12,193 (3,318 ) (1,960 ) Total $ 8,192 $ 56,811 $ 35,916 For fiscal 2015 and 2014, domestic pretax income included a loss of $19.1 million and income of $1.1 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 taxes are as follows: Twelve Months Ended June 30, June 30, June 30, (In thousands) Current: Federal $ 7,535 $ 19,870 $ 8,260 State 1,606 3,117 1,268 Foreign 1,791 613 449 10,932 23,600 9,977 Deferred: Federal 1,803 (3,951 ) 1,801 State (362 ) (51 ) 126 Foreign (2,283 ) 336 4 (842 ) (3,666 ) 1,931 $ 10,090 $ 19,934 $ 11,908 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 $ 2,868 $ 19,887 $ 12,570 State income taxes, net of Federal benefit 1,023 2,275 1,252 Deemed foreign dividends 1,462 — — Charges without tax benefit 1,478 1,405 1,231 Change in valuation allowance 25 — (140 ) IRC S199 deduction — (1,546 ) (844 ) Foreign tax credits (1,433 ) — — Research & Development Credit (1,197 ) (1,793 ) (1,450 ) Foreign tax differential (529 ) (182 ) (160 ) Other (276 ) 262 (551 ) Noncontrolling interest 6,669 (374 ) — Provision for income taxes $ 10,090 $ 19,934 $ 11,908 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 $ 234 Bad debt reserve 164 80 Paid-time-off accrual 765 712 Insurance reserve 2,178 2,519 Legal reserve 382 356 Net operating loss benefit and credit carryforwards 7,380 4,061 Valuation allowance (115 ) (90 ) Accrued compensation and pension 1,059 2,187 Stock compensation expense on nonvested deferred shares 3,080 1,969 Accrued losses 970 1,488 Other—net 897 314 Total deferred tax assets 17,072 13,830 Deferred tax liabilities: Tax over book depreciation 9,987 8,537 Tax over book amortization 1,658 1,903 Branch future liability 2,193 — Prepaid insurance 160 2,104 Other—net 589 459 Total deferred tax liabilities 14,587 13,003 Net deferred tax asset (liability) $ 2,485 $ 827 As reported in the consolidated balance sheets: June 30, June 30, (In thousands) Current deferred tax assets $ 8,298 $ 5,994 Non-current deferred tax assets 2,073 — Current deferred tax liabilities (473 ) — Non-current deferred tax liabilities (7,413 ) (5,167 ) Net deferred tax asset (liability) $ 2,485 $ 827 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, 2015 and June 30, 2014 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: Item Expiration Period Amount (in thousands) State net operating losses June 2024 to June 2031 $ 2,229 State tax credits No expiration 316 Federal foreign tax credits June 2016 to June 2024 3,371 Foreign net operating losses June 2027 to June 2034 8,656 Foreign tax credits June 2033 $ 16 In general, it is the practice and intention of the Company to reinvest the earnings of its Canadian subsidiaries in these operations. Such amounts become subject to United States taxation upon the remittance of dividends and under certain other circumstances. As of June 30, 2015 , unremitted earnings of foreign subsidiaries, which have been or are intended to be permanently invested, aggregated to approximately $5.1 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 several taxing jurisdictions in the United States and Canada. With few exceptions, the Company is no longer subject to examination by taxing authorities through fiscal 2010. At June 30, 2015 , 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 $0.8 million liability as of June 30, 2015 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, 2015
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, 2015 and June 30, 2014 , costs and estimated earnings in excess of billings on uncompleted contracts included revenues for unapproved change orders and claims of $12.7 million and $13.1 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, 2015
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, 2015 total $24.7 million and are payable as follows: fiscal 2016 — $5.0 million ; fiscal 2017 — $3.9 million ; fiscal 2018 — $3.3 million ; fiscal 2019 — $2.9 million ; fiscal 2020 — $2.0 million and thereafter— $7.7 million . Operating lease expense was $6.7 million , $5.3 million and $4.5 million for the twelve months ended June 30, 2015 , June 30, 2014 and June 30, 2013 , respectively.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Jun. 30, 2015
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, 2015 or June 30, 2014 . Treasury Shares On November 4, 2014 the Board of Directors approved a stock buyback program that replaced the program that had been in place since November 2012. The new program, which expires on December 31, 2016 , allows the Company to purchase up to $25.0 million annually, on a calendar year basis, of common stock if sufficient liquidity exists and management believes the shares purchased would be accretive to the Company's stockholders. The cumulative number of shares repurchased cannot exceed 2,653,399 , which represents 10% of the shares outstanding on the date the new repurchase program was approved. For the fiscal year ended June 30, 2015 , the Company utilized $5.0 million of cash to repurchase 283,772 shares of common stock as part of the stock buyback program. In addition to the stock buyback program, the Company may repurchase shares of common stock to satisfy the tax withholding obligations upon vesting of an employee’s deferred shares. Matrix repurchased 105,058 and 80,096 shares of common stock during fiscal 2015 and fiscal 2014 , respectively, to satisfy these obligations. These shares were returned to the Company’s pool of treasury shares. The Company has 1,447,394 treasury shares as of June 30, 2015 and intends to utilize these treasury shares solely in connection with equity awards under the Company’s stock incentive plans.

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Jun. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation Total stock-based compensation expense for the twelve months ended June 30, 2015 , June 30, 2014 , and June 30, 2013 was $6.3 million , $5.7 million and $3.8 million , respectively. Measured but unrecognized stock-based compensation expense at June 30, 2015 was $9.9 million , all of which related to nonvested deferred shares which are expected to be recognized as expense over a weighted average period of 1.7 years. The recognized tax benefit related to the stock-based compensation expense for the 12 months ended June 30, 2015 , June 30, 2014 and June 30, 2013 totaled $2.5 million , $2.8 million and $1.6 million , respectively. Plan Information Matrix Service Company's 2012 Stock and Incentive Compensation Plan ("2012 Plan") provides stock-based and cash-based incentives for officers, other key employees and directors. Stock options, restricted stock, restricted stock units, stock appreciation rights, performance shares and cash-based awards can be issued under this plan. All future grants of stock and cash-based awards will be made through the 2012 Plan. Upon approval of the 2012 Plan by the Company's stockholders, the 2004 Stock Incentive Plan ("2004 Plan") was frozen with the exception of normal vesting, forfeiture and other activity associated with awards previously granted under the 2004 Plan. Awards totaling 2,300,000 shares have been authorized under the 2012 Plan. At June 30, 2015 there were 1,524,837 shares available for grant under the 2012 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 2013, 2014, or 2015 . Stock option activity and related information for the year ended June 30, 2015 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, 2014 245,300 6.4 $ 9.68 Granted — $ — Exercised (55,200 ) $ 8.94 $ 737 Cancelled — $ — Outstanding at June 30, 2015 190,100 5.7 $ 9.90 $ 1,593 Vested at June 30, 2015 190,100 5.7 $ 9.90 $ 1,593 Exercisable at June 30, 2015 190,100 5.7 $ 9.90 $ 1,593 The total intrinsic value of stock options exercised during fiscal 2015 , 2014 , and 2013 was $0.7 million , $2.4 million and $0.6 million , respectively. The following table summarizes information about stock options at June 30, 2015 : Stock Options Outstanding Stock Options Exercisable Range of Exercise Price Options Outstanding Weighted-Average Exercise Price Weighted-Average Remaining Contractual Life Options Exercisable Weighted-Average Exercise Price Weighted-Average Remaining Contractual Life (Years) (Years) $5.49 8,000 $ 5.49 0.1 8,000 $ 5.49 0.1 8.93 14,000 8.93 0.3 14,000 8.93 0.3 10.19 168,100 10.19 6.4 168,100 10.19 6.4 $5.49 - $10.19 190,100 $ 9.90 5.7 190,100 $ 9.90 5.7 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 or five equal annual installments beginning one year after the grant date. Director awards cliff vest on the earlier of three years or upon retirement from the Board. • 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 is pro-rated and can range from zero to 200% of the original award. These awards are settled entirely in stock. As of June 30, 2015 , there are approximately 201,000 , 142,000 ,and 93,000 performance units that are scheduled to vest in fiscal 2016 , fiscal 2017 , and fiscal 2018 , respectively. 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 2015 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, 2015 is as follows: Shares Weighted Average Grant Date Fair Value per Share Nonvested shares at June 30, 2014 1,105,701 $ 13.22 Shares granted 242,649 $ 29.31 Shares vested and released (326,763 ) $ 11.69 Shares cancelled (31,319 ) $ 17.40 Nonvested shares at June 30, 2015 990,268 $ 17.49 There were 381,038 and 503,268 deferred shares granted in fiscal 2014 and 2013 with average grant date fair values of $18.01 and $10.96 , respectively. There were 326,763 , 266,029 and 367,449 deferred shares that vested and were released in fiscal 2015, 2014 and 2013 with weighted average fair values of $23.93 , $22.38 and $10.69 per share, respectively.

Earnings per Common Share

Earnings per Common Share	12 Months Ended
	Jun. 30, 2015
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 or 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: Twelve Months Ended June 30, June 30, June 30, (In thousands, except per share data) Basic EPS: Net income attributable to Matrix Service Company $ 17,157 $ 35,810 $ 24,008 Weighted average shares outstanding 26,603 26,288 25,962 Basic EPS $ 0.64 $ 1.36 $ 0.92 Diluted EPS: Weighted average shares outstanding—basic 26,603 26,288 25,962 Dilutive stock options 110 180 81 Dilutive nonvested deferred shares 464 508 315 Diluted weighted average shares 27,177 26,976 26,358 Diluted EPS $ 0.63 $ 1.33 $ 0.91 The following securities are considered antidilutive and have been excluded from the calculation of diluted earnings per share: Twelve Months Ended June 30, June 30, June 30, (In thousands) Stock options — — 193 Nonvested deferred shares 148 — 2 Total antidilutive securities 148 — 195

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Jun. 30, 2015
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 $4.9 million , $4.1 million and $3.4 million for the twelve months ended June 30, 2015 , 2014 , and 2013 , 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, 2015 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 2015 2014 2015 2014 2013 (In thousands) Joint Pension Fund Local Union 164 IBEW (1) 22-6031199/001 Yellow Yellow Yes $ 3,026 $ 2,955 $ 3,943 No 5/31/2017 Boilermaker-Blacksmith National Pension Trust 48-6168020/001 Yellow Yellow Yes 8,330 3,271 2,882 No Described below (2) Joint Pension Fund of Local Union No 102 (3) 22-1615726/001 Green Green N/A 2,395 2,381 2,387 No 6/1/2018 IBEW Local 456 Pension Plan (4) 22-6238995/001 Yellow Yellow Yes 788 940 2,384 No 5/31/2017 Local 351 IBEW Pension Plan 22-3417366/001 Described below (5) Described below (5) Described below (5) 2,608 2,218 2,281 Described below (5) 9/27/2016 Steamfitters Local Union No 420 Pension Plan 23-2004424/001 Red Red Yes 937 1,677 1,622 Yes 4/30/2017 IBEW Local Union 98 Pension Plan 23-1990722/001 Yellow Yellow Yes 2,768 1,380 1,212 No 5/1/2016 Indiana Laborers Pension Fund 35-6027150/001 Red Yellow Yes 2,519 1,268 — Yes 5/31/2017 Iron Workers Mid-America Pension Plan (6) 36-6488227/001 Green Green N/A 2,605 1,156 — No 5/31/2019 Plumbers & Pipefitters Local Union 74 Pension Fund 51-6015925/001 Yellow Yellow Yes 4,473 535 — No 6/15/2017 Pipe Fitters Retirement Fund, Local 597 62-6105084/001 Green Green N/A 2,259 949 — No 5/31/2017 Contributions to other multiemployer plans 22,282 11,639 7,754 Total contributions made $ 54,990 $ 30,369 $ 24,465 (1) Our contributions for the Joint Pension Fund Local Union 164 IBEW exceeded 5% of total contributions for the 2013 calendar plan year. This information was not available for the 2014 calendar plan year. (2) Our collective bargaining agreements with the Boilermaker-Blacksmith National Pension Trust are under a National Maintenance Agreement platform which is evergreen in terms of expiration. However, the agreements allow for termination of the collective bargaining agreement by either party with a predetermined written notice. (3) Our contributions for the Joint Pension Fund of Local Union 102 exceeded 5% of total contributions for the 2013 calendar plan year. This information was not available for the 2014 calendar plan year. (4) Our contributions for the IBEW Local 456 Pension Plan exceeded 5% of total contributions for the 2013 calendar plan year. This information was not available for the 2014 calendar plan year. (5) For the Local 351 IBEW Pension Plan, the Company has not received a funding notification that covers the Company's fiscal years 2014 or 2015 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 the Local 351 IBEW Pension Plan has not submitted any Critical or Endangered Status Notices to the Department of Labor for either calendar years 2014 or 2015 (which can be accessed at http://www.dol.gov/ebsa/criticalstatusnotices.html). (6) Our contributions for the Iron Workers Mid-America Pension Plan exceeded 5% of total contributions for the 2013 calendar plan year. This information was not available for the 2014 calendar plan year. 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 13,243 shares issued in fiscal 2015, 5,440 shares in fiscal 2014, and 4,452 shares in fiscal 2013.

Segment Information

Segment Information	12 Months Ended
	Jun. 30, 2015
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 construction and maintenance services to a variety of power generation facilities, such as combined cycle plants, natural gas fired power stations, and renewable energy installations. We also provide high voltage services to investor owned utilities, including construction of new substations, upgrades of existing substations, short-run transmission line installations, distribution upgrades and maintenance, and storm restoration services. The Oil Gas & Chemical segment includes our traditional turnaround activities, plant maintenance services and construction in the downstream petroleum industry. Another key offering is industrial cleaning services, which include hydroblasting, hydroexcavating, chemical cleaning and vacuum services. We also perform work in the petrochemical, natural gas, gas processing and compression, and upstream petroleum markets. The Storage Solutions segment includes new construction of crude and refined products 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 LNG, liquid nitrogen/liquid oxygen LIN/LOX, LPG tanks and other specialty vessels including spheres. Finally, we also offer aboveground storage tank products including floating roof seals. The Industrial segment includes construction and maintenance work in the iron and steel and mining and minerals industries, bulk material handling and fertilizer production facilities, as well as work for clients in other industrial markets. The Company evaluates performance and allocates resources based on operating income. The accounting policies of the reportable segments are the same as those described in the summary of significant accounting policies. Intersegment sales and transfers are recorded at cost; therefore, no intercompany profit or loss 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, 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 54,028 568,331 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 Twelve months ended June 30, 2014 Gross revenues $ 205,570 $ 240,131 $ 611,826 $ 206,933 $ — $ 1,264,460 Less: inter-segment revenues — 441 930 — — 1,371 Consolidated revenues 205,570 239,690 610,896 206,933 — 1,263,089 Gross profit 20,629 26,912 68,448 20,484 — 136,473 Operating income 7,703 9,939 34,310 6,655 — 58,607 Segment assets 120,264 72,406 200,493 105,049 70,720 568,932 Capital expenditures 9,055 5,421 2,519 1,157 5,437 23,589 Depreciation and amortization expense 3,292 3,768 7,707 3,751 — 18,518 Twelve months ended June 30, 2013 Gross revenues $ 171,204 $ 273,979 $ 395,794 $ 54,321 $ — $ 895,298 Less: inter-segment revenues — 131 2,593 — — 2,724 Consolidated revenues 171,204 273,848 393,201 54,321 — 892,574 Gross profit 21,754 32,879 37,455 2,614 — 94,702 Operating income (loss) 11,185 15,415 11,904 (1,790 ) — 36,714 Segment assets 64,771 75,591 159,149 27,347 83,120 409,978 Capital expenditures 2,129 2,942 9,929 1,645 6,586 23,231 Depreciation and amortization expense 2,167 2,943 6,740 932 — 12,782 Geographical information is as follows: Revenues Twelve Months Ended June 30, June 30, June 30, (In thousands) United States $ 1,205,713 $ 1,149,262 $ 814,879 Canada 137,422 113,827 77,695 $ 1,343,135 $ 1,263,089 $ 892,574 Long-Lived Assets June 30, June 30, June 30, (In thousands) United States $ 164,596 $ 164,894 $ 101,581 Canada 21,966 28,490 12,378 $ 186,562 $ 193,384 $ 113,959 Information about Significant Customers In fiscal 2015, one customer accounted for 12.3% of our consolidated revenue and 33.0% of our Storage Solutions revenue. Another customer accounted for 10.9% of our Storage Solutions revenue. Five other customers accounted for 25.1% , 16.3% , 14.7% , 12.7% and 12.7% of our Electrical Infrastructure revenue, respectively. An additional two customers accounted for 17.7% and 12.3% of our Oil Gas & Chemical revenue, respectively. Three other customers accounted for 34.0% , 27.6% , and 19.0% of our Industrial revenue, respectively. In fiscal 2014, two customers accounted for 17.3% and 12.7% of our consolidated revenue and 35.8% and 26.3% of our Storage Solutions revenue, respectively. Four other customers accounted for 20.8% , 17.5% , 17.0% , and 10.8% of our Electrical Infrastructure revenue, respectively. An additional three customers accounted for 18.3% , 14.0% , and 10.2% of our Oil Gas & Chemical revenue, respectively. Five more customers accounted for 23.3% , 15.1% , 13.0% , 12.7% , and 11.3% of our Industrial revenue, respectively. In fiscal 2013, one customer accounted for 10.7% of our consolidated revenue and 24.3% of our Storage Solutions revenue and an additional customer accounted for 10.6% of our Storage Solutions revenue. Four other customers accounted for 24.9% , 19.6% , 12.6% and 11.1% of our Electrical Infrastructure revenue, respectively. An additional three customers accounted for 20.7% , 16.1% and 10.0% of our Oil Gas & Chemical revenue, respectively. Three more customers accounted for 23.3% , 20.5% and 16.4% of our Industrial revenue, respectively.

Quarterly Financial Data (Unaud

Quarterly Financial Data (Unaudited) Quarterly Financial Data (Unaudited)	12 Months Ended
	Jun. 30, 2015
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Data (Unaudited)	Matrix Service Company Quarterly Financial Data (Unaudited) Fiscal Years Ended June 30, 2015 and June 30, 2014 First Quarter Second Quarter Third Quarter Fourth Quarter (In thousands, except per share amounts) Fiscal Year 2015 Revenues $ 321,683 $ 342,880 $ 314,155 $ 364,417 Gross profit 28,379 15,955 2,632 40,404 Operating income (loss) 8,547 (3,671 ) (14,448 ) 18,374 Net income (loss) attributable to Matrix Service Company 5,914 3,286 (2,959 ) 10,916 Earnings (loss) per common share: Basic 0.22 0.12 (0.11 ) 0.41 Diluted 0.22 0.12 (0.11 ) 0.40 Fiscal Year 2014 Revenues $ 226,217 $ 310,998 $ 381,516 $ 344,358 Gross profit 25,476 34,150 39,944 36,903 Operating income 10,762 14,817 18,819 14,209 Net income attributable to Matrix Service Company 6,552 10,306 11,396 7,556 Earnings per common share: Basic 0.25 0.39 0.43 0.29 Diluted 0.25 0.38 0.42 0.28 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, 2015
Valuation and Qualifying Accounts [Abstract]
Valuation and Qualifying Accounts	Matrix Service Company Schedule II—Valuation and Qualifying Accounts June 30, 2015 , June 30, 2014 , and June 30, 2013 (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 2015 Deducted from asset accounts: Allowance for doubtful accounts $ 204 $ 422 $ — $ (65 ) (A) $ 561 Valuation reserve for deferred tax assets 90 25 — — 115 Total $ 294 $ 447 $ — $ (65 ) $ 676 Fiscal Year 2014 Deducted from asset accounts: Allowance for doubtful accounts $ 795 $ 121 $ — $ (712 ) (A) $ 204 Valuation reserve for deferred tax assets 90 — — — 90 Total $ 885 $ 121 $ — $ (712 ) $ 294 Fiscal Year 2013 Deducted from asset accounts: Allowance for doubtful accounts $ 1,201 $ 725 $ (666 ) (B) $ (465 ) (A) $ 795 Valuation reserve for deferred tax assets 230 (140 ) — — 90 Total $ 1,431 $ 585 $ (666 ) $ (465 ) $ 885 (A) Receivables written off against allowance for doubtful accounts. (B) Collection of a fully reserved receivable recognized as revenue.

Summary of Significant Accoun25

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Jun. 30, 2015
Accounting Policies [Abstract]
Organization and Basis of Presentation	Organization and Basis of Presentation The consolidated financial statements 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 and Canada. 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 in conformity with accounting principles generally accepted in the United States 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 profits 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 expensed as incurred.
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 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, 2015 and $0.3 million of restricted cash at June 30, 2014 .
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	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 fir
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 are stated at the lower of cost or net realizable value. Cost is determined primarily using the average cost method.
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.
Internal Use Computer Software	Internal-Use Computer Software We expense or capitalize costs associated with the development of internal-use software as follows: Preliminary Project Stage : Both internal and external costs incurred during this stage are expensed as incurred. Application Development Stage : Both internal and external costs incurred to purchase or develop computer software are capitalized after the preliminary project stage is completed and management authorizes the computer software project. However, training costs and data conversion costs, which includes purging or cleansing of existing data, reconciling or balancing of data, are expensed as incurred. Post-Implementation/Operation Stage : All training costs and maintenance costs incurred during this stage are expensed as incurred. Costs of upgrades and enhancements are capitalized if the expenditures will result in adding functionality to the software. Capitalized software costs are depreciated using the straight-line method over the estimated useful life of the related software, which may be up to ten years.
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. We perform our annual analysis during the fourth quarter of each fiscal year and in any other period in which indicators of impairment warrant additional analysis. Goodwill impairment reviews involve a two-step process. Goodwill is first evaluated for impairment by comparing management’s estimate of the fair value of a reporting unit with its carrying value, including goodwill. 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 and gross margins, estimated operating and interest expense, 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 indications obtained from market-based approaches. We compare market multiples derived from market prices of stock of companies that are engaged in a similar line of business to the corresponding measures of the Company. We also consider the combined carrying values of our reporting units to our market capitalization. If the carrying value of our reporting unit is higher than its fair value, there is an indication that impairment may exist and the second step must be performed to measure the amount of impairment. The amount of impairment is determined by comparing the implied fair value of the reporting unit's goodwill to the carrying value of the goodwill calculated in the same manner as if the reporting unit were being acquired in a business combination. If the implied fair value of goodwill is less than its carrying value, we would record an impairment charge for the difference.
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 1.5 to 15 years. Intangible assets that have indefinite useful lives are not amortized but are tested at least annually for impairment. Each reporting period, we evaluate the remaining useful lives of intangible assets not being amortized to determine whether facts and circumstances continue to support an indefinite useful life. Intangible assets are considered impaired if the fair value of the intangible asset is less than its net book value. 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, net of estimated forfeitures.
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 currency of the Company’s operations in Canada is the Canadian dollar. The assets and liabilities are translated at the year end exchange rate 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 (Topic 606), Revenue from Contracts with Customers On May 28, 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-09. The standard outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. The core principle of the revenue model is that “an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services.” The ASU also requires entities to disclose both quantitative and qualitative information that enables users of financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. The ASU’s disclosure requirements are significantly more comprehensive than those in existing revenue standards. The ASU applies to all contracts with customers except those that are within the scope of other topics in the FASB Accounting Standards Codification ("ASC"). In July 2015, the FASB deferred the effective date by one year. With the deferral, this ASU is now effective for annual reporting periods beginning after December 15, 2017, with early adoption now permitted. We expect to adopt this standard on July 1, 2018 and are currently evaluating its expected impact on our financial statements. Accounting Standards Update 2014-08 (Topics 205 and 360), Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity On April 10, 2014, the FASB issued ASU 2014-08, which amends the definition of a discontinued operation in ASC 205-20 and requires entities to provide additional disclosures about discontinued operations as well as disposal transactions that do not meet the discontinued-operations criteria. The ASU is effective prospectively for all disposals (except disposals classified as held for sale before the adoption date) or components initially classified as held for sale in periods beginning on or after December 15, 2014. The Company adopted this standard as of January 1, 2015. The adoption of this standard did not impact on our consolidated financial statements. Accounting Standards Update 2014-15 (Subtopic 205-40)—Presentation of Financial Statements—Going Concern : Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern On August 27, 2014, the FASB issued ASU 2014-15, which provides guidance on determining when and how reporting entities must disclose going-concern uncertainties in their financial statements. The new standard requires management to perform interim and annual assessments of an entity’s ability to continue as a going concern within one year of the date of issuance of the entity’s financial statements. Further, an entity must provide certain disclosures if there is “substantial doubt about the entity’s ability to continue as a going concern.” The FASB believes that requiring management to perform the assessment will enhance the timeliness, clarity, and consistency of related disclosures and improve convergence with international financial reporting standards ("IFRSs") (which emphasize management’s responsibility for performing the going-concern assessment). However, the time horizon for the assessment (look-forward period) and the disclosure thresholds under U.S. GAAP and IFRSs will continue to differ. The ASU is effective for annual periods ending after December 15, 2016, and interim periods thereafter; early adoption is permitted. We expect to adopt this standard in fiscal 2017.

Acquisitions (Tables)

Acquisitions (Tables)	12 Months Ended
	Jun. 30, 2015
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Information	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, 2012 nor should it be taken as indicative of our future consolidated results of operations. Twelve Months Ended June 30, June 30, (In thousands, except per share data) Revenues $ 1,397,706 $ 1,096,267 Net income attributable to Matrix Service Company $ 38,786 $ 28,444 Basic earnings per common share $ 1.48 $ 1.10 Diluted earnings per common share $ 1.44 $ 1.08
HDB, Inc. [Member]
Business Acquisition [Line Items]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	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
Kvaerner North American Construction [Member]
Business Acquisition [Line Items]
Schedule of Business Acquisitions, by Acquisition	The following table summarizes the final purchase price allocation (in thousands): Current assets $ 83,575 Property, plant and equipment 11,377 Goodwill 39,295 Other intangible assets 24,009 Total assets acquired 158,256 Current liabilities 68,115 Deferred income taxes 1,179 Noncontrolling interest of consolidated joint venture 700 Net assets acquired 88,262 Cash acquired 36,655 Net purchase price $ 51,607

Customer Contracts (Tables)

Customer Contracts (Tables)	12 Months Ended
	Jun. 30, 2015
Contractors [Abstract]
Gross and net amount of uncompleted contracts	June 30, June 30, (In thousands) Costs and estimated earnings recognized on uncompleted contracts $ 1,633,780 $ 1,435,242 Billings on uncompleted contracts 1,644,413 1,470,674 $ (10,633 ) $ (35,432 ) Shown on balance sheet as: Costs and estimated earnings in excess of billings on uncompleted contracts $ 86,071 $ 73,008 Billings on uncompleted contracts in excess of costs and estimated earnings 96,704 108,440 $ (10,633 ) $ (35,432 )

Goodwill and Other Intangible28

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Jun. 30, 2015
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) Goodwill $ 29,666 $ 8,088 $ 10,985 $ 7,097 $ 55,836 Cumulative impairment loss (17,653 ) (3,000 ) (922 ) (3,425 ) (25,000 ) Net balance at June 30, 2013 12,013 5,088 10,063 3,672 30,836 Purchase of Kvaerner North American Construction (Note 2) 31,259 5,855 — 1,962 39,076 Translation adjustment (29 ) — (36 ) (10 ) (75 ) 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 (1,044 ) — (363 ) (196 ) (1,603 ) Net balance at June 30, 2015 $ 42,374 $ 14,008 $ 9,664 $ 5,472 $ 71,518
Carrying value of other intangible assets	Information on the carrying value of other intangible assets is as follows: At June 30, 2015 Useful Life Gross Carrying Amount Accumulated Amortization Net Carrying Amount (Years) (In thousands) Intellectual property 6 to 15 $ 2,460 $ (1,086 ) $ 1,374 Customer based 1.5 to 15 27,837 (7,109 ) 20,728 Non-compete agreements 4 to 5 1,354 (802 ) 552 Trade names 3 to 5 1,615 (308 ) 1,307 Total amortizing intangibles 33,266 (9,305 ) 23,961 At June 30, 2014 Useful Life Gross Carrying Amount Accumulated Amortization Net Carrying Amount (Years) (In thousands) Intellectual property 6 to 15 $ 2,460 $ (920 ) $ 1,540 Customer based 1.5 to 15 27,662 (2,949 ) 24,713 Non-compete agreements 3 to 5 1,312 (471 ) 841 Trade name 5 165 (33 ) 132 Total amortizing intangibles 31,599 (4,373 ) 27,226 Trade name Indefinite 1,450 — 1,450 Total intangible assets $ 33,049 $ (4,373 ) $ 28,676
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	Amortization expense totaled $5.0 million , $2.8 million , and $0.4 million in fiscal 2015 , 2014 , and 2013, respectively. We estimate that future amortization of other intangible assets will be as follows (in thousands): For year ending: June 30, 2016 $ 3,334 June 30, 2017 3,250 June 30, 2018 2,909 June 30, 2019 2,543 June 30, 2020 2,543 Thereafter 9,382 Total estimated amortization expense $ 23,961

Debt (Tables)

Debt (Tables)	12 Months Ended
	Jun. 30, 2015
Debt Disclosure [Abstract]
Availability under the senior credit facility

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Schedule of sources of pretax income	The sources of pretax income are as follows: Twelve Months Ended June 30, June 30, June 30, (In thousands) Domestic $ (4,001 ) $ 60,129 $ 37,876 Foreign 12,193 (3,318 ) (1,960 ) Total $ 8,192 $ 56,811 $ 35,916
Components of the provision for income taxes	The components of the provision for income taxes are as follows: Twelve Months Ended June 30, June 30, June 30, (In thousands) Current: Federal $ 7,535 $ 19,870 $ 8,260 State 1,606 3,117 1,268 Foreign 1,791 613 449 10,932 23,600 9,977 Deferred: Federal 1,803 (3,951 ) 1,801 State (362 ) (51 ) 126 Foreign (2,283 ) 336 4 (842 ) (3,666 ) 1,931 $ 10,090 $ 19,934 $ 11,908
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 $ 2,868 $ 19,887 $ 12,570 State income taxes, net of Federal benefit 1,023 2,275 1,252 Deemed foreign dividends 1,462 — — Charges without tax benefit 1,478 1,405 1,231 Change in valuation allowance 25 — (140 ) IRC S199 deduction — (1,546 ) (844 ) Foreign tax credits (1,433 ) — — Research & Development Credit (1,197 ) (1,793 ) (1,450 ) Foreign tax differential (529 ) (182 ) (160 ) Other (276 ) 262 (551 ) Noncontrolling interest 6,669 (374 ) — Provision for income taxes $ 10,090 $ 19,934 $ 11,908
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 $ 234 Bad debt reserve 164 80 Paid-time-off accrual 765 712 Insurance reserve 2,178 2,519 Legal reserve 382 356 Net operating loss benefit and credit carryforwards 7,380 4,061 Valuation allowance (115 ) (90 ) Accrued compensation and pension 1,059 2,187 Stock compensation expense on nonvested deferred shares 3,080 1,969 Accrued losses 970 1,488 Other—net 897 314 Total deferred tax assets 17,072 13,830 Deferred tax liabilities: Tax over book depreciation 9,987 8,537 Tax over book amortization 1,658 1,903 Branch future liability 2,193 — Prepaid insurance 160 2,104 Other—net 589 459 Total deferred tax liabilities 14,587 13,003 Net deferred tax asset (liability) $ 2,485 $ 827
Significant components of Company's deferred tax assets and liabilities as reported in consolidated balance sheets	June 30, June 30, (In thousands) Current deferred tax assets $ 8,298 $ 5,994 Non-current deferred tax assets 2,073 — Current deferred tax liabilities (473 ) — Non-current deferred tax liabilities (7,413 ) (5,167 ) Net deferred tax asset (liability) $ 2,485 $ 827
Summary of Operating Loss Carryforwards	These carryforwards will generally expire as shown below: Item Expiration Period Amount (in thousands) State net operating losses June 2024 to June 2031 $ 2,229 State tax credits No expiration 316 Federal foreign tax credits June 2016 to June 2024 3,371 Foreign net operating losses June 2027 to June 2034 8,656 Foreign tax credits June 2033 $ 16
Summary of Tax Credit Carryforwards	These carryforwards will generally expire as shown below: Item Expiration Period Amount (in thousands) State net operating losses June 2024 to June 2031 $ 2,229 State tax credits No expiration 316 Federal foreign tax credits June 2016 to June 2024 3,371 Foreign net operating losses June 2027 to June 2034 8,656 Foreign tax credits June 2033 $ 16

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Jun. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock option activity and related information	Stock options are granted at the market value of the Company’s common stock on the g
Assumptions used to calculate grant date fair value
Stock options information	The following table summarizes information about stock options at June 30, 2015 : Stock Options Outstanding Stock Options Exercisable Range of Exercise Price Options Outstanding Weighted-Average Exercise Price Weighted-Average Remaining Contractual Life Options Exercisable Weighted-Average Exercise Price Weighted-Average Remaining Contractual Life (Years) (Years) $5.49 8,000 $ 5.49 0.1 8,000 $ 5.49 0.1 8.93 14,000 8.93 0.3 14,000 8.93 0.3 10.19 168,100 10.19 6.4 168,100 10.19 6.4 $5.49 - $10.19 190,100 $ 9.90 5.7 190,100 $ 9.90 5.7
Nonvested deferred share activity	Nonvested deferred share activity for the twelve months ended June 30, 2015 is as follows: Shares Weighted Average Grant Date Fair Value per Share Nonvested shares at June 30, 2014 1,105,701 $ 13.22 Shares granted 242,649 $ 29.31 Shares vested and released (326,763 ) $ 11.69 Shares cancelled (31,319 ) $ 17.40 Nonvested shares at June 30, 2015 990,268 $ 17.49

Earnings per Common Share (Tabl

Earnings per Common Share (Tables)	12 Months Ended
	Jun. 30, 2015
Earnings Per Share [Abstract]
Computation of basic and diluted earnings per share	The computation of basic and diluted EPS is as follows: Twelve Months Ended June 30, June 30, June 30, (In thousands, except per share data) Basic EPS: Net income attributable to Matrix Service Company $ 17,157 $ 35,810 $ 24,008 Weighted average shares outstanding 26,603 26,288 25,962 Basic EPS $ 0.64 $ 1.36 $ 0.92 Diluted EPS: Weighted average shares outstanding—basic 26,603 26,288 25,962 Dilutive stock options 110 180 81 Dilutive nonvested deferred shares 464 508 315 Diluted weighted average shares 27,177 26,976 26,358 Diluted EPS $ 0.63 $ 1.33 $ 0.91
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 per share: Twelve Months Ended June 30, June 30, June 30, (In thousands) Stock options — — 193 Nonvested deferred shares 148 — 2 Total antidilutive securities 148 — 195

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Jun. 30, 2015
Compensation and Retirement Disclosure [Abstract]
Multiemployer Pension Plans	Our participation in significant plans for the fiscal year ended June 30, 2015 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 2015 2014 2015 2014 2013 (In thousands) Joint Pension Fund Local Union 164 IBEW (1) 22-6031199/001 Yellow Yellow Yes $ 3,026 $ 2,955 $ 3,943 No 5/31/2017 Boilermaker-Blacksmith National Pension Trust 48-6168020/001 Yellow Yellow Yes 8,330 3,271 2,882 No Described below (2) Joint Pension Fund of Local Union No 102 (3) 22-1615726/001 Green Green N/A 2,395 2,381 2,387 No 6/1/2018 IBEW Local 456 Pension Plan (4) 22-6238995/001 Yellow Yellow Yes 788 940 2,384 No 5/31/2017 Local 351 IBEW Pension Plan 22-3417366/001 Described below (5) Described below (5) Described below (5) 2,608 2,218 2,281 Described below (5) 9/27/2016 Steamfitters Local Union No 420 Pension Plan 23-2004424/001 Red Red Yes 937 1,677 1,622 Yes 4/30/2017 IBEW Local Union 98 Pension Plan 23-1990722/001 Yellow Yellow Yes 2,768 1,380 1,212 No 5/1/2016 Indiana Laborers Pension Fund 35-6027150/001 Red Yellow Yes 2,519 1,268 — Yes 5/31/2017 Iron Workers Mid-America Pension Plan (6) 36-6488227/001 Green Green N/A 2,605 1,156 — No 5/31/2019 Plumbers & Pipefitters Local Union 74 Pension Fund 51-6015925/001 Yellow Yellow Yes 4,473 535 — No 6/15/2017 Pipe Fitters Retirement Fund, Local 597 62-6105084/001 Green Green N/A 2,259 949 — No 5/31/2017 Contributions to other multiemployer plans 22,282 11,639 7,754 Total contributions made $ 54,990 $ 30,369 $ 24,465 (1) Our contributions for the Joint Pension Fund Local Union 164 IBEW exceeded 5% of total contributions for the 2013 calendar plan year. This information was not available for the 2014 calendar plan year. (2) Our collective bargaining agreements with the Boilermaker-Blacksmith National Pension Trust are under a National Maintenance Agreement platform which is evergreen in terms of expiration. However, the agreements allow for termination of the collective bargaining agreement by either party with a predetermined written notice. (3) Our contributions for the Joint Pension Fund of Local Union 102 exceeded 5% of total contributions for the 2013 calendar plan year. This information was not available for the 2014 calendar plan year. (4) Our contributions for the IBEW Local 456 Pension Plan exceeded 5% of total contributions for the 2013 calendar plan year. This information was not available for the 2014 calendar plan year. (5) For the Local 351 IBEW Pension Plan, the Company has not received a funding notification that covers the Company's fiscal years 2014 or 2015 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 the Local 351 IBEW Pension Plan has not submitted any Critical or Endangered Status Notices to the Department of Labor for either calendar years 2014 or 2015 (which can be accessed at http://www.dol.gov/ebsa/criticalstatusnotices.html).

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Jun. 30, 2015
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, 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 54,028 568,331 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 Twelve months ended June 30, 2014 Gross revenues $ 205,570 $ 240,131 $ 611,826 $ 206,933 $ — $ 1,264,460 Less: inter-segment revenues — 441 930 — — 1,371 Consolidated revenues 205,570 239,690 610,896 206,933 — 1,263,089 Gross profit 20,629 26,912 68,448 20,484 — 136,473 Operating income 7,703 9,939 34,310 6,655 — 58,607 Segment assets 120,264 72,406 200,493 105,049 70,720 568,932 Capital expenditures 9,055 5,421 2,519 1,157 5,437 23,589 Depreciation and amortization expense 3,292 3,768 7,707 3,751 — 18,518 Twelve months ended June 30, 2013 Gross revenues $ 171,204 $ 273,979 $ 395,794 $ 54,321 $ — $ 895,298 Less: inter-segment revenues — 131 2,593 — — 2,724 Consolidated revenues 171,204 273,848 393,201 54,321 — 892,574 Gross profit 21,754 32,879 37,455 2,614 — 94,702 Operating income (loss) 11,185 15,415 11,904 (1,790 ) — 36,714 Segment assets 64,771 75,591 159,149 27,347 83,120 409,978 Capital expenditures 2,129 2,942 9,929 1,645 6,586 23,231 Depreciation and amortization expense 2,167 2,943 6,740 932 — 12,782
Summary of revenues and long lived assets according to geographic areas	(In thousands) Electrical Infrastructure Oil Gas & Chemical Storage Solutions Industrial Unallocated Corporate Total 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 54,028 568,331 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 Twelve months ended June 30, 2014 Gross revenues $ 205,570 $ 240,131 $ 611,826 $ 206,933 $ — $ 1,264,460 Less: inter-segment revenues — 441 930 — — 1,371 Consolidated revenues 205,570 239,690 610,896 206,933 — 1,263,089 Gross profit 20,629 26,912 68,448 20,484 — 136,473 Operating income 7,703 9,939 34,310 6,655 — 58,607 Segment assets 120,264 72,406 200,493 105,049 70,720 568,932 Capital expenditures 9,055 5,421 2,519 1,157 5,437 23,589 Depreciation and amortization expense 3,292 3,768 7,707 3,751 — 18,518 Twelve months ended June 30, 2013 Gross revenues $ 171,204 $ 273,979 $ 395,794 $ 54,321 $ — $ 895,298 Less: inter-segment revenues — 131 2,593 — — 2,724 Consolidated revenues 171,204 273,848 393,201 54,321 — 892,574 Gross profit 21,754 32,879 37,455 2,614 — 94,702 Operating income (loss) 11,185 15,415 11,904 (1,790 ) — 36,714 Segment assets 64,771 75,591 159,149 27,347 83,120 409,978 Capital expenditures 2,129 2,942 9,929 1,645 6,586 23,231 Depreciation and amortization expense 2,167 2,943 6,740 932 — 12,782 Geographical information i

Quarterly Financial Data (Una35

Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Jun. 30, 2015
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Data (Unaudited)	Matrix Service Company Quarterly Financial Data (Unaudited) Fiscal Years Ended June 30, 2015 and June 30, 2014 First Quarter Second Quarter Third Quarter Fourth Quarter (In thousands, except per share amounts) Fiscal Year 2015 Revenues $ 321,683 $ 342,880 $ 314,155 $ 364,417 Gross profit 28,379 15,955 2,632 40,404 Operating income (loss) 8,547 (3,671 ) (14,448 ) 18,374 Net income (loss) attributable to Matrix Service Company 5,914 3,286 (2,959 ) 10,916 Earnings (loss) per common share: Basic 0.22 0.12 (0.11 ) 0.41 Diluted 0.22 0.12 (0.11 ) 0.40 Fiscal Year 2014 Revenues $ 226,217 $ 310,998 $ 381,516 $ 344,358 Gross profit 25,476 34,150 39,944 36,903 Operating income 10,762 14,817 18,819 14,209 Net income attributable to Matrix Service Company 6,552 10,306 11,396 7,556 Earnings per common share: Basic 0.25 0.39 0.43 0.29 Diluted 0.25 0.38 0.42 0.28

Summary of Significant Accoun36

Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Summary of Significant Accounting Policies (Textual) [Abstract]
Restricted cash	$ 0.3	$ 0.3
Account receivables	25.2	30
Other assets	2.8	4.3
Accounts payable	$ 10.2	$ 10.4
Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life of intangible assets	1 year 6 months
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

Acquisitions (Details Textual)

Acquisitions (Details Textual) - USD ($) $ in Thousands	Aug. 22, 2014	Dec. 21, 2013	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Business Acquisition [Line Items]
Goodwill			$ 71,518				$ 69,837				$ 71,518	$ 69,837	$ 30,836
Noncontrolling interest in joint venture			(8,742)				1,767				(8,742)	1,767
Revenues											1,343,135	1,263,089	892,574
Operating income			$ 18,374	$ (14,448)	$ (3,671)	$ 8,547	$ 14,209	$ 18,819	$ 14,817	$ 10,762	$ 8,802	58,607	36,714
HDB, Inc. [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition	Aug. 22, 2014
Acquisition price						$ 5,600
Kvaerner North American Construction [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred		$ 51,607
Stock acquired, percent		100.00%
Acquisition price		$ 88,262							88,262
Goodwill		39,295							$ 39,295
Tax deductible goodwill		30,700
Acquisition-related expenses													2,000
Incremental intangible amortization expense												4,100	4,100
Depreciation expenses												1,300	$ 1,300
Income from one-time tax settlement												$ 600
MXPB Power Partners [Member]
Business Acquisition [Line Items]
Ownership interest in joint venture, percent			65.00%								65.00%
Equity of joint venture acquired		2,000
Company's portion of joint venture equity acquired		1,300
Noncontrolling interest in joint venture		$ 700

Acquisitions (Details)

Acquisitions (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2015	Sep. 30, 2014	Dec. 31, 2013	Dec. 21, 2013
Business Acquisition [Line Items]
Goodwill	$ 69,837	$ 30,836	$ 71,518
Pro Forma Information:
Revenues	1,397,706	1,096,267
Net income attributable to Matrix Service Company	$ 38,786	$ 28,444
Basic earnings per common share (in dollars per share)	$ 1.48	$ 1.10
Diluted earnings per common share (in dollars per share)	$ 1.44	$ 1.08
HDB, Inc. [Member]
Business Acquisition [Line Items]
Net assets acquired				$ 5,600
Kvaerner North American Construction [Member]
Business Acquisition [Line Items]
Current assets						$ 83,575
Property, plant and equipment						11,377
Goodwill					$ 39,295	39,295
Tax deductible goodwill						30,700
Other intangible assets						24,009
Total assets acquired						158,256
Current liabilities						68,115
Deferred income taxes						1,179
Noncontrolling interest of consolidated joint venture						700
Net assets acquired					$ 88,262	88,262
Cash acquired						$ 36,655

Customer Contracts (Details)

Customer Contracts (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 30, 2014
Gross and net amount of uncompleted contracts
Costs and estimated earnings recognized on uncompleted contracts	$ 1,633,780	$ 1,435,242
Billings on uncompleted contracts	1,644,413	1,470,674
Total	(10,633)	(35,432)
Shown on balance sheet as:
Costs and estimated earnings in excess of billings on uncompleted contracts	86,071	73,008
Billings on uncompleted contracts in excess of costs and estimated earnings	96,704	108,440
Total	$ (10,633)	$ (35,432)

Customer Contracts (Details Tex

Customer Contracts (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Business Acquisition [Line Items]
Change In Accounting Estimate, Financial Effect, Operating Income	$ 53.4
Change in Accounting Estimate, Financial Effect, Net Income	18.3
Provision for Loss on Contracts		$ 8.4

Goodwill and Other Intangible41

Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Goodwill [Line Items]
Acquisition Related Adjustment for Final Working Capital Settlement	$ 219
Carrying value of goodwill by segment
Goodwill			$ 55,836
Cumulative impairment loss			(25,000)
Net Goodwill	69,837	$ 30,836
Purchase of Kvaerner North American Construction and Pelichem	3,065	39,076
Translation adjustment	(1,603)	(75)
Net Goodwill	71,518	69,837
Electrical Infrastructure [Member]
Goodwill [Line Items]
Acquisition Related Adjustment for Final Working Capital Settlement	175
Carrying value of goodwill by segment
Goodwill			29,666
Cumulative impairment loss			(17,653)
Net Goodwill	43,243	12,013
Purchase of Kvaerner North American Construction and Pelichem	0	31,259
Translation adjustment	(1,044)	(29)
Net Goodwill	42,374	43,243
Oil Gas & Chemical [Member]
Carrying value of goodwill by segment
Goodwill			8,088
Cumulative impairment loss			(3,000)
Net Goodwill	10,943	5,088
Purchase of Kvaerner North American Construction and Pelichem	3,065	5,855
Net Goodwill	14,008	10,943
Storage Solutions [Member]
Carrying value of goodwill by segment
Goodwill			10,985
Cumulative impairment loss			(922)
Net Goodwill	10,027	10,063
Purchase of Kvaerner North American Construction and Pelichem	0
Translation adjustment	(363)	(36)
Net Goodwill	9,664	10,027
Industrial [Member]
Goodwill [Line Items]
Acquisition Related Adjustment for Final Working Capital Settlement	44
Carrying value of goodwill by segment
Goodwill			7,097
Cumulative impairment loss			$ (3,425)
Net Goodwill	5,624	3,672
Purchase of Kvaerner North American Construction and Pelichem	0	1,962
Translation adjustment	(196)	(10)
Net Goodwill	$ 5,472	$ 5,624

Goodwill and Other Intangible42

Goodwill and Other Intangible Assets (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Carrying value of other intangible assets
Gross carrying amount	$ 33,266	$ 31,599
Accumulated amortization	(9,305)	(4,373)
Net carrying amount	23,961	27,226
Intangible assets, gross, excluding Goodwill		33,049
Accumulated amortization - Intangible assets, excluding Goodwill		(4,373)
Intangible assets, net, excluding Goodwill	$ 23,961	28,676
Minimum [Member]
Carrying value of other intangible assets
Useful life of intangible assets	1 year 6 months
Maximum [Member]
Carrying value of other intangible assets
Useful life of intangible assets	15 years
Trade Names [Member]
Carrying value of other intangible assets
Indefinite-lived trade names		1,450
SM Electric Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Trade Names, Gross	$ 1,500
Intellectual Property [Member]
Carrying value of other intangible assets
Gross carrying amount	2,460	2,460
Accumulated amortization	(1,086)	(920)
Net carrying amount	$ 1,374	$ 1,540
Intellectual Property [Member] | Minimum [Member]
Carrying value of other intangible assets
Useful life of intangible assets	6 years	6 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	$ 27,837	$ 27,662
Accumulated amortization	(7,109)	(2,949)
Net carrying amount	$ 20,728	$ 24,713
Customer based [Member] | Minimum [Member]
Carrying value of other intangible assets
Useful life of intangible assets	1 year 6 months	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	$ 1,354	$ 1,312
Accumulated amortization	(802)	(471)
Net carrying amount	$ 552	$ 841
Noncompete Agreements [Member] | Minimum [Member]
Carrying value of other intangible assets
Useful life of intangible assets	4 years	3 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
Useful life of intangible assets		5 years
Gross carrying amount	$ 1,615	$ 165
Accumulated amortization	(308)	(33)
Net carrying amount	$ 1,307	$ 132
Trade Names [Member] | Minimum [Member]
Carrying value of other intangible assets
Useful life of intangible assets	3 years
Trade Names [Member] | Maximum [Member]
Carrying value of other intangible assets
Useful life of intangible assets	5 years

Goodwill and Other Intangible43

Goodwill and Other Intangible Assets (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Goodwill [Line Items]
Impairment of Intangible Assets, Finite-lived	$ 0	$ 0	$ 255
Goodwill and Other Intangible Assets (Textual) [Abstract]
Amortization expense	5,000	2,800	$ 400
June 30, 2015	3,334
June 30, 2016	3,250
June 30, 2017	2,909
June 30, 2018	2,543
June 30, 2019	2,543
Thereafter	9,382
Net carrying amount	$ 23,961	27,226
Minimum [Member]
Goodwill [Line Items]
Finite-Lived Intangible Asset, Useful Life	1 year 6 months
Maximum [Member]
Goodwill [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years
Customer Based [Member]
Goodwill and Other Intangible Assets (Textual) [Abstract]
Net carrying amount	$ 20,728	$ 24,713
Customer Based [Member] | Minimum [Member]
Goodwill [Line Items]
Finite-Lived Intangible Asset, Useful Life	1 year 6 months	1 year 6 months
Customer Based [Member] | Maximum [Member]
Goodwill [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years	15 years
Noncompete Agreements [Member]
Goodwill and Other Intangible Assets (Textual) [Abstract]
Net carrying amount	$ 552	$ 841
Noncompete Agreements [Member] | Minimum [Member]
Goodwill [Line Items]
Finite-Lived Intangible Asset, Useful Life	4 years	3 years
Noncompete Agreements [Member] | Maximum [Member]
Goodwill [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years	5 years

Debt (Details)

Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 30, 2014
Availability under senior credit facility
Senior credit facility	$ 200,000	$ 200,000
Capacity Constraint Due To Senior Leverage Ratio	54,968	0
Line Of Credit Facility Maximum Borrowing Capacity After Consideration Of Capacity Constraint	145,032	200,000
Borrowings outstanding	8,804	11,621
Letters of credit issued	40,587	23,017
Availability under the senior credit facility	$ 95,641	$ 165,362

Debt (Details Textual)

Debt (Details Textual) $ in Thousands	12 Months Ended
	Jun. 30, 2015USD ($)	Jun. 30, 2014USD ($)
Line of Credit Facility [Line Items]
Line Of Credit Facility Maximum Borrowing Capacity After Consideration Of Capacity Constraint	$ 145,032	$ 200,000
Debt (Textual) [Abstract]
Senior secured revolving credit facility	$ 200,000	$ 200,000
Line of Credit Facility, Expiration Date	Mar. 13, 2019
Senior Leverage Ratio, Maximum	2.5
Senior Leverage Ratio, Minimum	1
Fixed Charge Coverage Ratio, Maximum	1.25
Fixed Charge Coverage Ratio, Minimum	1
Limit on asset dispositions	$ 20,000
Additional Margin on alternate base rate loans, Minimum	0.25%
Additional Margin on alternate base rate loans, Maximum	1.00%
Additional Margin on LIBOR loans, Minimum	1.25%
Additional Margin on LIBOR loans, Maximum	2.00%
Sublimit on Canadian dollar borrowings	$ 40,000
Additional Margin on CDOR loans, Minimum	1.25%
Additional Margin on CDOR loans, Maximum	2.00%
Additional Margin on Canadian prime rate loans, Minimum	1.75%
Additional Margin on Canadian prime rate loans, Maximum	2.50%
Maximum limit of consolidated funded indebtedness	2.5
Consolidated EBITDA as defined in the Credit Agreement	$ 58,000
Consolidated Funded Indebtedness	$ 42,400
CDOR Rate description	Sum of the annual rate of interest which is the rate determined as being the arithmetic average of the quotations of all institutions listed in respect of the relevant CDOR interest period for Canadian Dollar denominated bankers’ acceptances, plus 0.1%
Canadian prime rate description	Greater of (i) the rate of interest per annum most recently announced or established by JPMorgan Chase Bank, N.A., Toronto Branch as its reference rate in effect on such day for determining interest rates for Canadian Dollar denominated commercial loans in Canada and (ii) the CDOR Rate plus 1.0%
Minimum [Member]
Line of Credit Facility [Line Items]
Unused Credit Facility Fee	0.20%
Maximum [Member]
Line of Credit Facility [Line Items]
Unused Credit Facility Fee	0.35%
CDOR Rate [Member]
Line of Credit Facility [Line Items]
Spread on variable rate basis (percent)	0.10%
Canadian Prime Rate [Member]
Line of Credit Facility [Line Items]
Spread on variable rate basis (percent)	1.00%

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Components of pretax income
Domestic	$ (4,001)	$ 60,129	$ 37,876
Foreign	12,193	(3,318)	(1,960)
Income before income tax expense	$ 8,192	$ 56,811	$ 35,916

Income Taxes (Details 1)

Income Taxes (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Current:
Federal	$ 7,535	$ 19,870	$ 8,260
State	1,606	3,117	1,268
Foreign	1,791	613	449
Total	10,932	23,600	9,977
Deferred:
Federal	1,803	(3,951)	1,801
State	(362)	(51)	126
Foreign	(2,283)	336	4
Total	(842)	(3,666)	1,931
Provision for income taxes	$ 10,090	$ 19,934	$ 11,908

Income Taxes (Details 2)

Income Taxes (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
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	$ 2,868	$ 19,887	$ 12,570
State income taxes, net of Federal benefit	1,023	2,275	1,252
Charges without tax benefit	1,478	1,405	1,231
Change in valuation allowance	25	0	(140)
IRS S199 deduction	0	(1,546)	(844)
Research & Development Credit	(1,197)	(1,793)	(1,450)
Foreign tax differential	(529)	(182)	(160)
Other	(276)	262	(551)
Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Amount	6,669	(374)	0
Provision for income taxes	$ 10,090	$ 19,934	$ 11,908

Income Taxes (Details 3)

Income Taxes (Details 3) - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 30, 2014
Deferred tax assets:
Warranty reserve	$ 312	$ 234
Bad debt reserve	164	80
Paid time-off accrual	765	712
Insurance reserve	2,178	2,519
Legal reserve	382	356
Net operating loss benefit and credit carryforwards	7,380	4,061
Valuation allowance	(115)	(90)
Accrued compensation and pension	1,059	2,187
Stock compensation expense on nonvested deferred shares	3,080	1,969
Accrued losses	970	1,488
Other-net	897	314
Total deferred tax assets	17,072	13,830
Deferred tax liabilities:
Tax over book depreciation	9,987	8,537
Tax over book amortization	1,658	1,903
Prepaid insurance	160	2,104
Other-net	589	459
Total deferred tax liabilities	14,587	13,003
Net deferred tax asset (liability)	$ 2,485	$ 827

Income Taxes (Details 4)

Income Taxes (Details 4) - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 30, 2014
Income Tax Disclosure [Abstract]
Deferred Tax Assets, Gross, Current	$ 8,298	$ 5,994
Deferred Tax Assets, Gross, Noncurrent	2,073	0
Deferred Tax Liabilities, Gross, Current	473	0
Significant components of Company's deferred tax assets and liabilities as reported in consolidated balance sheets
Deferred Tax Liabilities, Gross, Noncurrent	7,413	5,167
Net deferred tax liability	$ 2,485	$ 827

Income Taxes (Details Textual)

Income Taxes (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Income Tax Disclosure [Abstract]
Income (Loss) from Continuing Operations Attributable to Noncontrolling Interest	$ 19.1	$ 1.1
Unremitted earnings	5.1
Liability for Uncertain Tax Positions, Noncurrent	$ 0.8

Contingencies (Details Textual)

Contingencies (Details Textual) - USD ($) $ in Millions	Jun. 30, 2015	Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]
Claims related to unapproved change orders	$ 12.7	$ 13.1

Operating Leases (Details Textu

Operating Leases (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Leases [Abstract]
Future minimum operating lease payable, in total	$ 24.7
Minimum operating lease payable, Fiscal 2016	5
Minimum operating lease payable, Fiscal 2017	3.9
Minimum operating lease payable, Fiscal 2018	3.3
Minimum operating lease payable, Fiscal 2019	2.9
Minimum operating lease payable, Fiscal 2020	2
Minimum operating lease payable, Thereafter	7.7
Operating lease expense	$ 6.7	$ 5.3	$ 4.5

Stockholders' Equity (Details T

Stockholders' Equity (Details Textual) - USD ($) $ in Thousands	Dec. 31, 2016	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013	Nov. 06, 2012
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program Expiration Date	Dec. 31, 2016
Preferred stock shares authorized		5,000,000	5,000,000
Preferred stock shares issued		0	0
Preferred stock shares outstanding		0	0
Purchase of common stock on stock buyback program					2,653,399
Payments for Repurchase of Common Stock		$ (5,000)	$ 0	$ 0
Stock Repurchased During Period, Shares		283,772
Annual maximum purchases authorized under stock buyback program		$ 25,000
Common stock shares withheld		105,058	80,096
Treasury stock, shares		1,447,394	1,453,770

Stock-Based Compensation (Detai

Stock-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Stock option activity and related information
Number of options outstanding at June 30, 2014	245,300
Number of options granted	0
Number of options exercised	(55,200)	(134,450)	(97,840)
Number of options cancelled	0
Number of options outstanding at June 30, 2015	190,100	245,300
Number of options vested or expected to vest at June 30, 2015	190,100
Number of options exercisable at June 30, 2015	190,100
Weighted average remaining contractual life	5 years 8 months	6 years 5 months
Weighted average remaining contractual life vested or expected to vest at June 30, 2015	5 years 8 months
Weighted average remaining contractual life exercisable at June 30, 2015	5 years 8 months
Weighted average exercise price at June 30, 2014	$ 9.68
Weighted average exercise price granted	0
Weighted average exercise price exercised	8.94
Weighted average exercise price cancelled	0
Weighted average exercise price at June 30, 2015	9.90	$ 9.68
Weighted average exercise price vested or expected to vest at June 30, 2015	9.90
Weighted average exercise price exercisable at June 30, 2015	$ 9.90
Aggregate intrinsic value exercised	$ 737	$ 2,400	$ 600
Aggregate intrinsic value outstanding at June 30, 2015	1,593
Aggregate intrinsic value vested or expected to be vest at June 30, 2015	1,593
Aggregate intrinsic value exercisable at June 30, 2015	$ 1,593

Stock-Based Compensation (Det56

Stock-Based Compensation (Details 2) - $ / shares	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Stock options information
Stock options outstanding, option outstanding	190,100	245,300
Stock options outstanding weighted average exercise price	$ 9.90
Stock options outstanding weighted average remaining contractual life	5 years 8 months	6 years 5 months
Stock options exercisable option outstanding	190,100
Stock options exercisable weighted average exercise price	$ 9.90
Stock options exercisable weighted average remaining contractual life	5 years 8 months
Range Three [Member]
Stock options information
Range of exercise price lower limit	$ 10.19
Range of exercise price upper limit	$ 10.19
Stock options outstanding, option outstanding	168,100
Stock options outstanding weighted average exercise price	$ 10.19
Stock options outstanding weighted average remaining contractual life	6 years 5 months
Stock options exercisable option outstanding	168,100
Stock options exercisable weighted average exercise price	$ 10.19
Stock options exercisable weighted average remaining contractual life	6 years 5 months
Range One [Member]
Stock options information
Range of exercise price lower limit	$ 5.49
Range of exercise price upper limit	$ 5.49
Stock options outstanding, option outstanding	8,000
Stock options outstanding weighted average exercise price	$ 5.49
Stock options outstanding weighted average remaining contractual life	1 month
Stock options exercisable option outstanding	8,000
Stock options exercisable weighted average exercise price	$ 5.49
Stock options exercisable weighted average remaining contractual life	1 month
Range Two [Member]
Stock options information
Range of exercise price lower limit	$ 8.93
Range of exercise price upper limit	$ 8.93
Stock options outstanding, option outstanding	14,000
Stock options outstanding weighted average exercise price	$ 8.93
Stock options outstanding weighted average remaining contractual life	4 months
Stock options exercisable option outstanding	14,000
Stock options exercisable weighted average exercise price	$ 8.93
Stock options exercisable weighted average remaining contractual life	4 months

Stock-Based Compensation (Det57

Stock-Based Compensation (Details 3) - 12 months ended Jun. 30, 2015 - $ / shares	Total
Nonvested deferred share activity
Nonvested shares at June 30, 2014	1,105,701
Shares granted	242,649
Shares vested and released	(326,763)
Shares cancelled	(31,319)
Nonvested shares at June 30, 2015	990,268
Weighted average grant date fair value per share at June 30, 2014	$ 13.22
Weighted average grant date fair value per share granted	29.31
Weighted average grant date fair value per share vested and released	11.69
Weighted average grant date fair value per share cancelled	17.40
Weighted average grant date fair value per share at June 30, 2015	$ 17.49

Stock-Based Compensation (Det58

Stock-Based Compensation (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 6,302	$ 5,688	$ 3,831
Unrecognized stock-based compensation expense	$ 9,900
Weighted average period	1 year 8 months
Stock based compensation expense recognized tax	$ 2,500	2,800	1,600
Common stock grant expiration term	10 years
Total intrinsic value of stock option	$ 737	$ 2,400	$ 600
Vesting period	3 years
Vesting period of director awards	3 years
Description of vesting period of director awards	3 years
Deferred shares granted		381,038	503,268
Average grant date fair value		$ 18.01	$ 10.96
Deferred shares vested and released	326,763	266,029	367,449
Weighted average fair value	$ 23.93	$ 22.38	$ 10.69
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
Employee Award [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	5 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 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum threshold shares scheduled to vest for performance based shares	201,000
Vest in 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum threshold shares scheduled to vest for performance based shares	142,000
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	93,000
Matrix Service Company's 2012 Stock and Incentive Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share awards authorized	2,300,000
Share awards grant	1,524,837

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, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Basic EPS:
Net income	$ 10,916	$ (2,959)	$ 3,286	$ 5,914	$ 7,556	$ 11,396	$ 10,306	$ 6,552	$ 17,157	$ 35,810	$ 24,008
Weighted average shares outstanding									26,603	26,288	25,962
Basic EPS (in dollars per share)	$ 0.41	$ (0.11)	$ 0.12	$ 0.22	$ 0.29	$ 0.43	$ 0.39	$ 0.25	$ 0.64	$ 1.36	$ 0.92
Diluted EPS:
Weighted average shares outstanding									26,603	26,288	25,962
Dilutive stock options									110	180	81
Dilutive nonvested deferred shares									464	508	315
Diluted weighted average shares									27,177	26,976	26,358
Diluted EPS (in dollars per share)	$ 0.40	$ (0.11)	$ 0.12	$ 0.22	$ 0.28	$ 0.42	$ 0.38	$ 0.25	$ 0.63	$ 1.33	$ 0.91

Earnings per Common Share (De60

Earnings per Common Share (Details 1) - shares shares in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Antidilutive Securities Excluded From Computation Of Diluted Earnings Per Share
Total antidilutive securities	148	0	195
Stock Options [Member]
Antidilutive Securities Excluded From Computation Of Diluted Earnings Per Share
Total antidilutive securities	0	0	193
Nonvested Deferred Shares [Member]
Antidilutive Securities Excluded From Computation Of Diluted Earnings Per Share
Total antidilutive securities	148	0	2

Employee Benefit Plans (Details

Employee Benefit Plans (Details) - USD ($)		12 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Multiemployer Pension Plans
Total contributions made		$ 54,990	$ 30,369	$ 24,465
Contributions to other multiemployer plans		$ 22,282	$ 11,639	7,754
Joint Pension Fund Local Union One Six Four Ibew [Member]
Multiemployer Pension Plans
EIN/Pension Plan Number	[1]	22-6031199/001
Pension Protection Act Zone Status		Yellow	Yellow
FIP/RP Status Pending or Implemented		Implemented
Total contributions made		$ 3,026	$ 2,955	3,943
Surcharge Imposed		No
Expiration Date of Collective-Bargaining Agreement		May 31, 2017
Boilermaker-Blacksmith National Pension Trust [Member]
Multiemployer Plans [Line Items]
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date, Description	[2]	Described below (2)
Multiemployer Pension Plans
EIN/Pension Plan Number		48-6168020/001
Pension Protection Act Zone Status		Yellow	Yellow
FIP/RP Status Pending or Implemented		Implemented
Total contributions made		$ 8,330	$ 3,271	2,882
Surcharge Imposed		No
Joint Pension Fund Local Union Number One Zero Two [Member] [Domain]
Multiemployer Pension Plans
EIN/Pension Plan Number	[3]	22-1615726/001
Pension Protection Act Zone Status		Green	Green
FIP/RP Status Pending or Implemented		NA
Total contributions made		$ 2,395	$ 2,381	2,387
Surcharge Imposed		No
Expiration Date of Collective-Bargaining Agreement		Jun. 1, 2018
IBEW Local Four Five Six Pension Plan [Member] [Domain]
Multiemployer Pension Plans
EIN/Pension Plan Number	[4]	22-6238995/001
Pension Protection Act Zone Status		Yellow	Yellow
FIP/RP Status Pending or Implemented		Implemented
Total contributions made		$ 788	$ 940	2,384
Surcharge Imposed		No
Expiration Date of Collective-Bargaining Agreement		May 31, 2017
Local 351 IBEW Pension Plan [Member]
Multiemployer Pension Plans
EIN/Pension Plan Number	[5]	22-3417366/001
Multiemployer Plans, Certified Zone Status, Description		Described below (5)	Described below (5)
FIP/RP Status Pending or Implemented		Implemented
Total contributions made		$ 2,608	$ 2,218	2,281
Multiemployer Plan, Surcharge		Described below (5)
Expiration Date of Collective-Bargaining Agreement		Sep. 27, 2016
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		$ 937	$ 1,677	1,622
Surcharge Imposed		Yes
Expiration Date of Collective-Bargaining Agreement		Apr. 30, 2017
IBEW Local Union Nine Eight Pension Plan [Member]
Multiemployer Pension Plans
EIN/Pension Plan Number		23-1990722/001
Pension Protection Act Zone Status		Yellow	Yellow
FIP/RP Status Pending or Implemented		Implemented
Total contributions made		$ 2,768	$ 1,380	1,212
Surcharge Imposed		No
Expiration Date of Collective-Bargaining Agreement		May 1, 2016
Indiana Laborers Pension Fund [Domain]
Multiemployer Pension Plans
EIN/Pension Plan Number		35-6027150/001
Pension Protection Act Zone Status		Red	Yellow
FIP/RP Status Pending or Implemented		Implemented
Total contributions made		$ 2,519	$ 1,268	0
Surcharge Imposed		Yes
Expiration Date of Collective-Bargaining Agreement		May 31, 2017
Ironworkers Mid-America Pension Plan [Member]
Multiemployer Pension Plans
EIN/Pension Plan Number		36-6488227/001
Pension Protection Act Zone Status		Green	Green
Total contributions made		$ 2,605	$ 1,156	0
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		$ 4,473	$ 535	0
Surcharge Imposed		No
Expiration Date of Collective-Bargaining Agreement		Jun. 15, 2017
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
Total contributions made		$ 2,259	$ 949	$ 0
Surcharge Imposed		No
Expiration Date of Collective-Bargaining Agreement		May 31, 2017
[1]	Our contributions for the Joint Pension Fund Local Union 164 IBEW exceeded 5% of total contributions for the 2013 calendar plan year. This information was not available for the 2014 calendar plan year.
[2]	Our collective bargaining agreements with the Boilermaker-Blacksmith National Pension Trust are under a National Maintenance Agreement platform which is evergreen in terms of expiration. However, the agreements allow for termination of the collective bargaining agreement by either party with a predetermined written notice.
[3]	Our contributions for the Joint Pension Fund of Local Union 102 exceeded 5% of total contributions for the 2013 calendar plan year. This information was not available for the 2014 calendar plan year.
[4]	Our contributions for the IBEW Local 456 Pension Plan exceeded 5% of total contributions for the 2013 calendar plan year. This information was not available for the 2014 calendar plan year.
[5]	For the Local 351 IBEW Pension Plan, the Company has not received a funding notification that covers the Company's fiscal years 2014 or 2015 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 the Local 351 IBEW Pension Plan has not submitted any Critical or Endangered Status Notices to the Department of Labor for either calendar years 2014 or 2015 (which can be accessed at http://www.dol.gov/ebsa/criticalstatusnotices.html).

Employee Benefit Plans (Detai62

Employee Benefit Plans (Details Textual) - USD ($)	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
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	$ 4,900,000	$ 4,100,000	$ 3,400,000
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	13,243	5,440	4,452
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
Plumbers and Pipefitters Local Union Seven Four Pension Fund [Member]
Multiemployer Plans [Line Items]
Multiemployer Plans, Funding Improvement Plan and Rehabilitation Plan	Implemented

Segment Information (Details)

Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Results of Operations
Revenues									$ 1,343,135	$ 1,263,089	$ 892,574
Less: Inter-segment revenues									1,343,135	1,263,089	892,574
Gross profit	$ 40,404	$ 2,632	$ 15,955	$ 28,379	$ 36,903	$ 39,944	$ 34,150	$ 25,476	87,370	136,473	94,702
Operating income (loss)	18,374	$ (14,448)	$ (3,671)	$ 8,547	14,209	$ 18,819	$ 14,817	$ 10,762	8,802	58,607	36,714
Segment assets	568,331				568,932				568,331	568,932	409,978
Capital expenditures									15,773	23,589	23,231
Depreciation and amortization									23,480	18,518	12,782
Electrical Infrastructure [Member]
Results of Operations
Revenues									257,930	205,570	171,204
Less: Inter-segment revenues									257,930	205,570	171,204
Gross profit									(31,444)	20,629	21,754
Operating income (loss)									(44,293)	7,703	11,185
Segment assets	129,725				120,264				129,725	120,264	64,771
Capital expenditures									579	9,055	2,129
Depreciation and amortization									4,915	3,292	2,167
Oil Gas & Chemical [Member]
Results of Operations
Revenues									305,360	239,690	273,848
Less: Inter-segment revenues									305,360	239,690	273,848
Gross profit									25,394	26,912	32,879
Operating income (loss)									7,064	9,939	15,415
Segment assets	108,960				72,406				108,960	72,406	75,591
Capital expenditures									3,858	5,421	2,942
Depreciation and amortization									4,772	3,768	2,943
Storage Solutions [Member]
Results of Operations
Gross profit									58,085	68,448	37,455
Operating income (loss)									29,069	34,310	11,904
Segment assets	172,857				200,493				172,857	200,493	159,149
Capital expenditures									2,396	2,519	9,929
Depreciation and amortization									7,298	7,707	6,740
Industrial [Member]
Results of Operations
Gross profit									35,335	20,484	2,614
Operating income (loss)									16,962	6,655	(1,790)
Segment assets	102,761				105,049				102,761	105,049	27,347
Capital expenditures									1,139	1,157	1,645
Depreciation and amortization									6,495	3,751	932
Unallocated Corporate [Member]
Results of Operations
Segment assets	$ 54,028				$ 70,720				54,028	70,720	83,120
Capital expenditures									7,801	5,437	6,586
Gross [Member]
Results of Operations
Revenues									1,354,230	1,264,460	895,298
Less: Inter-segment revenues									1,354,230	1,264,460	895,298
Gross [Member] | Electrical Infrastructure [Member]
Results of Operations
Revenues									257,930	205,570	171,204
Less: Inter-segment revenues									257,930	205,570	171,204
Gross [Member] | Oil Gas & Chemical [Member]
Results of Operations
Revenues									310,826	240,131	273,979
Less: Inter-segment revenues									310,826	240,131	273,979
Gross [Member] | Storage Solutions [Member]
Results of Operations
Revenues									504,155	611,826	395,794
Less: Inter-segment revenues									504,155	611,826	395,794
Gross [Member] | Industrial [Member]
Results of Operations
Revenues									281,319	206,933	54,321
Less: Inter-segment revenues									281,319	206,933	54,321
Industrial [Member]
Results of Operations
Revenues									276,722	206,933	54,321
Less: Inter-segment revenues									276,722	206,933	54,321
Storage Solutions [Member]
Results of Operations
Revenues									503,123	610,896	393,201
Less: Inter-segment revenues									503,123	610,896	393,201
Intersegment Eliminations [Member]
Results of Operations
Revenues									11,095	1,371	2,724
Less: Inter-segment revenues									11,095	1,371	2,724
Intersegment Eliminations [Member] | Electrical Infrastructure [Member]
Results of Operations
Revenues									0	0	0
Less: Inter-segment revenues									0	0	0
Intersegment Eliminations [Member] | Oil Gas & Chemical [Member]
Results of Operations
Revenues									5,466	441	131
Less: Inter-segment revenues									5,466	441	131
Intersegment Eliminations [Member] | Storage Solutions [Member]
Results of Operations
Revenues									1,032	930	2,593
Less: Inter-segment revenues									1,032	930	2,593
Intersegment Eliminations [Member] | Industrial [Member]
Results of Operations
Revenues									4,597	0	0
Less: Inter-segment revenues									$ 4,597	$ 0	$ 0

Segment Information (Details 1)

Segment Information (Details 1) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Summary of revenues and long lived assets according to geographic areas
Revenues	$ 364,417	$ 314,155	$ 342,880	$ 321,683	$ 344,358	$ 381,516	$ 310,998	$ 226,217	$ 1,343,135	$ 1,263,089	$ 892,574
Long-Lived Assets	186,562				193,384				186,562	193,384		$ 113,959
Domestic [Member]
Summary of revenues and long lived assets according to geographic areas
Revenues									1,205,713	1,149,262	814,879
Long-Lived Assets	164,596				164,894				164,596	164,894		$ 101,581
International [Member]
Summary of revenues and long lived assets according to geographic areas
Revenues									137,422	113,827	77,695
Long-Lived Assets	$ 21,966				$ 28,490				$ 21,966	$ 28,490	$ 12,378

Segment Information (Details Te

Segment Information (Details Textual)	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Customer One [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	12.30%	17.30%	10.70%
Customer Two [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue		12.70%
Electrical Infrastructure [Member] | Customer One [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	25.10%	20.80%	24.90%
Electrical Infrastructure [Member] | Customer Two [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	16.30%	17.50%	19.60%
Electrical Infrastructure [Member] | Customer Three [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	14.70%	17.00%	12.60%
Electrical Infrastructure [Member] | Customer Four [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	12.70%	10.80%	11.10%
Electrical Infrastructure [Member] | Customer Five [Member] [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	12.70%
Oil Gas & Chemical [Member] | Customer One [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	17.70%	18.30%	20.70%
Oil Gas & Chemical [Member] | Customer Two [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	12.30%	14.00%	16.10%
Oil Gas & Chemical [Member] | Customer Three [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue		10.20%	10.00%
Storage Solutions [Member] | Customer One [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	33.00%	35.80%	24.30%
Storage Solutions [Member] | Customer Two [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	10.90%	26.30%	10.60%
Industrial [Member] | Customer One [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	34.00%	23.30%	23.30%
Industrial [Member] | Customer Two [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	27.60%	15.10%	20.50%
Industrial [Member] | Customer Three [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	19.00%	13.00%	16.40%
Industrial [Member] | Customer Four [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue		12.70%
Industrial [Member] | Customer Five [Member] [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue		11.30%

Quarterly Financial Data (Una66

Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Quarterly Financial Information Disclosure [Abstract]
Sales Revenue, Services, Net	$ 364,417	$ 314,155	$ 342,880	$ 321,683	$ 344,358	$ 381,516	$ 310,998	$ 226,217	$ 1,343,135	$ 1,263,089	$ 892,574
Gross Profit	40,404	2,632	15,955	28,379	36,903	39,944	34,150	25,476	87,370	136,473	94,702
Operating income	18,374	(14,448)	(3,671)	8,547	14,209	18,819	14,817	10,762	8,802	58,607	36,714
Net income	$ 10,916	$ (2,959)	$ 3,286	$ 5,914	$ 7,556	$ 11,396	$ 10,306	$ 6,552	$ 17,157	$ 35,810	$ 24,008
Basic earnings per common share (in dollars per share)	$ 0.41	$ (0.11)	$ 0.12	$ 0.22	$ 0.29	$ 0.43	$ 0.39	$ 0.25	$ 0.64	$ 1.36	$ 0.92
Diluted earnings per common share (in dollars per share)	$ 0.40	$ (0.11)	$ 0.12	$ 0.22	$ 0.28	$ 0.42	$ 0.38	$ 0.25	$ 0.63	$ 1.33	$ 0.91

Valuation and Qualifying Acco67

Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands		12 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period		$ 294	$ 885	$ 1,431
Charged to Costs and Expenses		447	121	585
Charged to Other Accounts		0	0	(666)
Deductions		(65)	(712)	(465)
Balance at End of Period		676	294	885
Allowance for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period		204	795	1,201
Charged to Costs and Expenses		422	121	725
Charged to Other Accounts		0	0	(666)	[1]
Deductions	[2]	(65)	(712)	(465)
Balance at End of Period		561	204	795
Valuation Allowance of Deferred Tax Assets [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period		90	90	230
Charged to Costs and Expenses		25	0	(140)
Charged to Other Accounts		0	0	0
Deductions		0	0	0
Balance at End of Period		$ 115	$ 90	$ 90
[1]	Collection of a fully reserved receivable recognized as revenue.
[2]	Receivables written off against allowance for doubtful accounts.