Matrix Service (MTRX) 10-Q 7 Nov 17 2018 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Sep. 30, 2017	Nov. 02, 2017
Document Documentand Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Trading Symbol	MTRX
Entity Registrant Name	MATRIX SERVICE CO
Entity Central Index Key	866,273
Current Fiscal Year End Date	--06-30
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		26,748,394

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Revenues	$ 269,910	$ 341,781
Cost of revenues	241,019	309,503
Gross profit	28,891	32,278
Selling, general and administrative expenses	21,570	17,977
Operating income	7,321	14,301
Other income (expense):
Interest expense	(618)	(243)
Interest income	39	12
Other	149	7
Income before income tax expense	6,891	14,077
Provision for federal, state and foreign income taxes	3,067	4,735
Net income	$ 3,824	$ 9,342
Basic earnings (loss) per common share (US$ per share)	$ 0.14	$ 0.35
Diluted earnings (loss) per common share (US$ per share)	$ 0.14	$ 0.35
Weighted average common shares outstanding:
Basic (shares)	26,655	26,387
Diluted (shares)	26,762	26,796

Condensed Consolidated Stateme3

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 3,824	$ 9,342
Other comprehensive income (loss), net of tax:
Foreign currency translation gain (loss) (net of tax of $16 and $37 for the three months ended September 30, 2017 and 2016, respectively)	1,107	(279)
Comprehensive income	$ 4,931	$ 9,063

Condensed Consolidated Stateme4

Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	$ 16	$ 37

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Jun. 30, 2017
Current assets:
Cash and cash equivalents	$ 46,085	$ 43,805
Accounts receivable, less allowances (September 30, 2017— $9,889 and June 30, 2017—$9,887)	218,678	210,953
Costs and estimated earnings in excess of billings on uncompleted contracts	65,953	91,180
Inventories	4,269	3,737
Income taxes receivable	3,649	4,042
Other current assets	8,991	4,913
Total current assets	347,625	358,630
Property, plant and equipment at cost:
Land and buildings	39,397	38,916
Construction equipment	96,325	94,298
Transportation equipment	48,645	48,574
Office equipment and software	36,702	36,556
Construction in progress	3,459	5,952
Property, plant and equipment at cost, gross	224,528	224,296
Accumulated depreciation	(146,603)	(144,022)
Property, plant and equipment at cost, net	77,925	80,274
Goodwill	113,860	113,501
Other intangible assets	24,831	26,296
Deferred income taxes	2,568	3,385
Other assets	5,645	3,944
Total assets	572,454	586,030
Current liabilities:
Accounts payable	90,894	105,649
Billings on uncompleted contracts in excess of costs and estimated earnings	65,559	75,127
Accrued wages and benefits	26,357	20,992
Accrued insurance	9,033	9,340
Income taxes payable	17	169
Other accrued expenses	7,660	7,699
Total current liabilities	199,520	218,976
Deferred income taxes	2,006	128
Borrowings under senior revolving credit facility	42,076	44,682
Other liabilities	414	435
Total liabilities	244,016	264,221
Commitments and contingencies
Matrix Service Company stockholders' equity:
Common stock—$.01 par value; 60,000,000 shares authorized; 27,888,217 shares issued as of September 30, 2017, and June 30, 2017; 26,727,975 and 26,600,562 shares outstanding as of September 30, 2017 and June 30, 2017	279	279
Additional paid-in capital	127,526	128,419
Retained earnings	226,798	222,974
Accumulated other comprehensive loss	(6,217)	(7,324)
Matrix Service Company stockholders' equity	348,386	344,348
Less: Treasury stock, at cost — 1,160,242 shares as of September 30, 2017, and 1,287,655 shares as of June 30, 2017	(19,948)	(22,539)
Total stockholders' equity	328,438	321,809
Total stockholders' equity	328,438	321,809
Total liabilities and stockholders’ equity	$ 572,454	$ 586,030

Condensed Consolidated Balance6

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Jun. 30, 2017
Statement Condensed Consolidated Balance Sheets [Abstract]
Accounts receivable, allowances	$ 9,889	$ 9,887
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	60,000,000	60,000,000
Common stock, shares issued	27,888,217	27,888,217
Common stock, shares outstanding	26,727,975	26,600,562
Treasury stock, shares	1,160,242	1,287,655

Condensed Consolidated Stateme7

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Operating activities:
Net income	$ 3,824	$ 9,342
Adjustments to reconcile net income to net cash provided (used) by operating activities:
Depreciation and amortization	5,593	4,904
Deferred income tax	2,711	1,044
Gain on sale of property, plant and equipment	(121)	(138)
Provision for uncollectible accounts	7	54
Stock-based compensation expense	2,086	1,652
Other	93	63
Changes in operating assets and liabilities increasing (decreasing) cash:
Accounts receivable	(7,734)	(40,595)
Costs and estimated earnings in excess of billings on uncompleted contracts	25,227	(1,093)
Inventories	(532)	168
Other assets and liabilities	(5,291)	(2,206)
Accounts payable	(14,463)	(13,597)
Billings on uncompleted contracts in excess of costs and estimated earnings	(9,568)	(5,945)
Accrued expenses	4,998	(3,241)
Net cash provided (used) by operating activities	6,830	(49,588)
Investing activities:
Acquisition of property, plant and equipment	(1,878)	(1,826)
Proceeds from asset sales	248	153
Net cash used by investing activities	(1,630)	(1,673)
Financing activities:
Advances under senior revolving credit facility	24,890	27,186
Repayments of advances under senior revolving credit facility	(27,496)	(10,000)
Payments of debt issuance costs	(340)	0
Issuances of common stock	0	46
Proceeds from issuance of common stock under employee stock purchase plan	66	83
Repurchase of common stock for payment of statutory taxes due on equity-based compensation	(454)	(1,878)
Net cash provided (used) by financing activities	(3,334)	15,437
Effect of exchange rate changes on cash and cash equivalents	414	(253)
Increase (decrease) in cash and cash equivalents	2,280	(36,077)
Cash and cash equivalents, beginning of period	43,805
Cash and cash equivalents, end of period	46,085
Supplemental disclosure of cash flow information:
Income taxes	98	2,997
Interest	582	238
Non-cash investing and financing activities:
Purchases of property, plant and equipment on account	$ 191	$ 79

Condensed Consolidated Stateme8

Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning equity balances, as adjusted	$ 315,566	$ 279	$ 127,058	$ 223,157	$ (26,907)	$ (6,845)	$ (1,176)
Retrospective adjustment upon adoption of ASU 2016-09	0		100	(100)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Jun. 30, 2016	315,566	279	126,958	223,257	(26,907)	(6,845)	(1,176)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	9,342			9,342			0
Other comprehensive income (loss)	(279)					(279)
Treasury shares sold to Employee Stock Purchase Plan	83		38		45
Exercise of stock options	46		(25)		71
Issuance of deferred shares	0		(4,259)		4,259
Other treasury share purchases	(1,878)				(1,878)
Stock-based compensation expense	1,652		1,652
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Sep. 30, 2016	324,532	279	124,464	232,499	(24,410)	(7,124)	(1,176)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Jun. 30, 2017	321,809	279	128,419	222,974	(22,539)	(7,324)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,824			3,824			0
Other comprehensive income (loss)	1,107					1,107
Treasury shares sold to Employee Stock Purchase Plan	66		(96)		162
Issuance of deferred shares	0		(2,883)		2,883
Other treasury share purchases	(454)				(454)
Stock-based compensation expense	2,086		2,086
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Sep. 30, 2017	$ 328,438	$ 279	$ 127,526	$ 226,798	$ (19,948)	$ (6,217)	$ 0

Condensed Consolidated Stateme9

Condensed Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - shares	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Exercise of stock options, shares	0	4,400
Issuance of deferred shares, shares	163,201	335,295
Employee Stock Purchase Plan, shares	7,121	4,982
Other treasury shares purchases, shares	42,909	113,762

Basis of Presentation (Notes)

Basis of Presentation (Notes)	3 Months Ended
	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation and Accounting Policies The condensed consolidated financial statements include the accounts of Matrix Service Company (“Matrix”, “we”, “our”, “us”, “its” or the “Company”) and its subsidiaries, unless otherwise indicated. Intercompany balances and transactions have been eliminated in consolidation. The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with Rule 10-01 of Regulation S-X for interim financial statements required to be filed with the Securities and Exchange Commission and do not include all information and footnotes required by U.S. generally accepted accounting principles for complete financial statements. The information furnished reflects all adjustments, consisting of normal recurring adjustments, that are, in the opinion of management, necessary for a fair statement of the results of operations, cash flows and financial position for the interim periods presented. The accompanying condensed financial statements should be read in conjunction with the audited financial statements for the year ended June 30, 2017 , included in the Company’s Annual Report on Form 10-K for the year then ended. The results of operations for the three month period ended September 30, 2017 may not necessarily be indicative of the results of operations for the full year ending June 30, 2018 . Recently Issued Accounting Standards Accounting Standards Update 2014-09, Revenue from Contracts with Customers (Topic 606) On May 28, 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-09. The standard outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. The core principle of the revenue model is that “an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services.” The ASU also requires entities to disclose both quantitative and qualitative information that enables users of financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. The ASU's disclosure requirements are significantly more comprehensive than those in existing revenue standards. The ASU applies to all contracts with customers except those that are within the scope of other topics in the FASB Accounting Standards Codification ("ASC"). The ASU is effective for annual reporting periods beginning after December 15, 2017, including interim reporting periods within that reporting period. Early adoption is permitted on a limited basis. Management is currently evaluating the impact of adopting the ASU on the Company's financial position, results of operations, cash flows and related disclosures. Adoption of this ASU is expected to affect the manner in which the Company determines the unit of account for its projects (i.e., performance obligations). Under existing guidance, the Company may have multiple performance obligations for large, complex projects. Upon adoption, the Company expects that similar projects may have fewer performance obligations, possibly just one in some cases, which will result in a more constant recognition of revenue and profit over the term of the project. In addition, management expects that profit could be recognized earlier for contract amounts related to unapproved change orders and claims. The Company will adopt this standard on July 1, 2018 using the modified retrospective method of application, which may result in a cumulative effect adjustment to retained earnings as of the date of adoption. Management has completed its review of the new revenue standard and is currently reviewing its contracts in order to confirm its understanding of how the new standard will impact its revenue recognition policy, disclosures, processes and internal controls. At this time, we cannot reliably estimate the amount of any potential retrospective adjustment. Accounting Standards Update 2016-02, Leases (Topic 842) On February 25, 2016, the FASB issued ASU 2016-02. The amendments in this update require, among other things, that lessees recognize the following for all leases (with the exception of short-term leases) at the commencement date: (1) a lease liability, which is a lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis; and (2) a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. Lessees and lessors must apply a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The ASU is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted, but we do not plan to do so at this time. We are currently evaluating the ASU's expected impact on our financial statements. See Note 8 of Item 8. Financial Statements and Supplementary Data in our 2017 Form 10-K for more information about the timing and amount of future operating lease payments, which we believe is indicative of the materiality of adoption of the ASU to our financial statements. Accounting Standards Update 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments On June 16, 2016, the FASB issued ASU 2016-13, which will change how the Company accounts for its allowance for uncollectible accounts. The amendments in this update require a financial asset (or a group of financial assets) to be presented at the net amount expected to be collected. The income statement will reflect any increases or decreases of expected credit losses that have taken place during the period. The measurement of expected credit losses is based on relevant information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectibility of the reported amount. Current GAAP delays the recognition of the full amount of credit losses until the loss is probable of occurring. The amendments in this update eliminate the probable initial recognition threshold and, instead, reflect the Company's current estimate of all expected credit losses. In addition, current guidance limits the information the Company may consider in measuring a credit loss to its past events and current conditions. The amendments in this update broaden the information the Company may consider in developing its expected credit loss estimate to include forecasted information. The amendments in this update are effective for the Company on July 1, 2020 and the Company may early adopt on July 1, 2019. The Company must apply the amendments in this update through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective. At this time, the Company does not expect this update to have a material impact to its estimate of the allowance for uncollectible accounts. Accounting Standards Update 2017-09, Compensation-Stock Compensation (Topic 718): Scope of Modification Accounting In May 2017, the FASB issued ASU 2017-09 which clarifies when changes to the terms or conditions of a share-based payment award must be accounted for as a modification. Entities should apply the modification accounting guidance if the value, vesting conditions or classification of the award changes. ASU 2017-09 is effective for interim and annual reporting periods beginning after December 15, 2017. Early adoption is permitted and prospective application is required. Management does not expect the adoption of ASU 2017-09 to have a material impact on the Company’s financial position, results of operations or cash flows.

Acquisitions (Notes)

Acquisitions (Notes)	3 Months Ended
	Sep. 30, 2017
Business Combinations [Abstract]
Acquisitions	Note 2 – Acquisitions Purchase of Houston Interests, LLC On December 12, 2016 , the Company completed the acquisition of Houston Interests, LLC ("Houston Interests"), a premier global solutions company that provides consulting, engineering, design, construction services and systems integration. Houston Interests brings expertise to the Company in natural gas processing; sulfur recovery, processing and handling; liquid terminals, silos and other bulk storage; process plant design; power generation environmental controls and material handling; industrial power distribution; electrical, instrumentation and controls; marine structures; material handling systems and terminals for cement, sulfur, fertilizer, coal and grain; and process heaters. The business has been included in our Matrix PDM Engineering, Inc. subsidiary, and its operating results impact primarily the Oil Gas & Chemical and Industrial segments. The Company purchased all of the equity interests of Houston Interests for $42.5 million in cash, net of working capital adjustments and cash acquired. The consideration paid is as follows (in thousands): Cash paid for equity interest $ 46,000 Cash paid for working capital 6,837 Less: cash acquired (10,331 ) Net purchase price $ 42,506 The Company funded the equity interest portion of the consideration paid from borrowings under the Company's senior secured revolving credit facility (See Note 5). The purchase of working capital was paid with cash on hand. The net purchase price was allocated to the major categories of assets and liabilities based on their estimated fair value at the acquisition date. The following table summarizes the preliminary net purchase price allocation (in thousands): Cash $ 10,331 Accounts receivable 10,273 Costs and estimated earnings in excess of billings on uncompleted contracts 746 Other current assets 454 Current assets 21,804 Property, plant and equipment 942 Goodwill 35,146 Other intangible assets 10,220 Total assets acquired 68,112 Accounts payable 962 Billings on uncompleted contracts in excess of costs and estimated earnings 11,648 Other accrued expenses 2,475 Current liabilities 15,085 Other liabilities 190 Net assets acquired 52,837 Less: cash acquired 10,331 Net purchase price $ 42,506 The goodwill recognized from the acquisition is primarily attributable to the technical expertise of the acquired workforce and the complementary nature of Houston Interests' operations, which the Company believes will enable the combined entity to expand its service offerings and enter new markets. All of the goodwill recognized is deductible for income tax purposes. The fair value of the net assets acquired is preliminary pending the final valuation of those assets. As a result, goodwill is also preliminary since it has been recorded as the excess of the purchase price over the estimated fair value of the net assets acquired. The Company has agreed to pay the previous owners up to $2.6 million for any unused portion of acquired warranty obligations outstanding as of June 30, 2017. This agreement was settled for $1.7 million , which was paid in July 2017. This settlement was reflected as a decrease to the acquired current liabilities and an increase to the net purchase price. The unaudited financial information in the table below summarizes the combined results of operations of Matrix Service Company and Houston Interests for the three months ended September 30, 2017 and 2016, on a pro forma basis, as though the companies had been combined as of July 1, 2015. The pro forma financial information presented in the table below is for informational purposes only and is not indicative of the results of operations that would have been achieved if the acquisition had taken place at July 1, 2015 nor should it be taken as indicative of future consolidated results of operations. Three Months Ended September 30, 2017 September 30, 2016 (In thousands, except per share data) Revenues $ 269,910 $ 378,494 Net income $ 3,824 $ 10,788 Basic earnings per common share $ 0.14 $ 0.41 Diluted earnings per common share $ 0.14 $ 0.40 The pro forma financial information presented in the table above includes the following adjustments to the combined entities' historical financial statements: • Pro forma earnings during the three months ended September 30, 2016 were adjusted to include $0.3 million of integration expenses that would have been recognized had the acquisition occurred on July 1, 2015. • Pro forma earnings during the three months ended September 30, 2016 were adjusted to include $0.4 million of interest expense. The interest was attributable to the assumption that the Company's borrowings of $46.0 million used to fund the net purchase price had been outstanding as of July 1, 2015. This interest was partially offset by the assumption that Houston Interests' former debt was extinguished as of July 1, 2015. • Pro forma earnings during the three months ended September 30, 2016 were adjusted to exclude $0.1 million of depreciation and intangible asset amortization expense. This adjustment is due to the recognition of amortizable intangible assets as part of the acquisition and the effect of fair value adjustments to acquired property, plant and equipment. • Pro forma earnings during the three months ended September 30, 2016 were adjusted to include income tax expense of $1.9 million . Houston Interests was previously an exempt entity and income taxes were not assessed in its historical financial information.

Uncompleted Contracts (Notes)

Uncompleted Contracts (Notes)	3 Months Ended
	Sep. 30, 2017
Disclosure Customer Contracts Additional Information [Abstract]
Uncompleted Contracts	Uncompleted Contracts Contract terms of the Company’s construction contracts generally provide for progress billings based on project milestones. The excess of costs incurred and estimated earnings over amounts billed on uncompleted contracts is reported as a current asset. The excess of amounts billed over costs incurred and estimated earnings recognized on uncompleted contracts is reported as a current liability. Gross and net amounts on uncompleted contracts are as follows: September 30, June 30, (in thousands) Costs incurred and estimated earnings recognized on uncompleted contracts $ 1,451,623 $ 1,919,054 Billings on uncompleted contracts 1,451,229 1,903,001 $ 394 $ 16,053 Shown in balance sheet as: Costs and estimated earnings in excess of billings on uncompleted contracts $ 65,953 $ 91,180 Billings on uncompleted contracts in excess of costs and estimated earnings 65,559 75,127 $ 394 $ 16,053 Progress billings in accounts receivable at September 30, 2017 and June 30, 2017 included retentions to be collected within one year of $43.7 million and $54.3 million , respectively. Contract retentions collectible beyond one year are included in other assets in the condensed consolidated balance sheet and totaled $3.5 million as of September 30, 2017 and $1.9 million as of June 30, 2017.

Intangible Assets Including Goo

Intangible Assets Including Goodwill (Notes)	3 Months Ended
	Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets Including Goodwill	Intangible Assets Including Goodwill Goodwill The changes in the carrying value of goodwill by segment are as follows: Electrical Infrastructure Oil Gas & Chemical Storage Solutions Industrial Total (In thousands) Net balance at June 30, 2017 $ 42,152 $ 33,604 $ 16,764 $ 20,981 $ 113,501 Translation adjustment (1) 234 — 81 44 359 Net balance at September 30, 2017 $ 42,386 $ 33,604 $ 16,845 $ 21,025 $ 113,860 (1) The translation adjustments relate to the periodic translation of Canadian Dollar and South Korean Won denominated goodwill recorded as a part of prior acquisitions in Canada and South Korea, in which the local currency was determined to be the functional currency. We performed our annual goodwill impairment test as of May 31, 2017, which resulted in no impairment. However, the aggregate difference between the fair values of our reporting units and their carrying amounts decreased significantly since the previous year's test as a result of market conditions at that time. The fair value of one reporting unit (carrying value of goodwill of $8.0 million ) only exceeded its carrying amount by 9% . The valuation model for this reporting unit assumed the award of a significant project prior to the end of the second fiscal quarter, with project work to commence shortly thereafter. This project award was subsequently obtained during the first fiscal quarter of 2018, which resolved the previous contingency. In addition, operating results for the Company during the three months ended September 30, 2017, including updated forecasts for the remainder of the year, do not indicate the existence of any goodwill impairment. The Company will continue to monitor its operating results and forecasts for indicators of impairment and perform additional tests as needed. Other Intangible Assets Information on the carrying value of other intangible assets is as follows: At September 30, 2017 Useful Life Gross Carrying Amount Accumulated Amortization Net Carrying Amount (Years) (In thousands) Intellectual property 9 to 15 $ 2,579 $ (1,469 ) $ 1,110 Customer-based 1 to 15 38,376 (14,913 ) 23,463 Non-compete agreements 4 to 5 1,453 (1,352 ) 101 Trade names 1 to 3 1,630 (1,473 ) 157 Total amortizing intangible assets $ 44,038 $ (19,207 ) $ 24,831 At June 30, 2017 Useful Life Gross Carrying Amount Accumulated Amortization Net Carrying Amount (Years) (In thousands) Intellectual property 9 to 15 $ 2,579 $ (1,425 ) $ 1,154 Customer-based 1 to 15 38,207 (13,543 ) 24,664 Non-compete agreements 4 to 5 1,453 (1,298 ) 155 Trade names 1 to 3 1,630 (1,307 ) 323 Total amortizing intangible assets $ 43,869 $ (17,573 ) $ 26,296 Amortization expense totaled $1.6 million and $0.8 million during the three months ended September 30, 2017 and September 30, 2016 , respectively. We estimate that the remaining amortization expense related to September 30, 2017 amortizing intangible assets will be as follows (in thousands): Period ending: Remainder of Fiscal 2018 $ 4,092 Fiscal 2019 3,522 Fiscal 2020 3,505 Fiscal 2021 3,445 Fiscal 2022 2,337 Fiscal 2023 2,045 Thereafter 5,885 Total estimated remaining amortization expense at September 30, 2017 $ 24,831

Debt (Notes)

Debt (Notes)	3 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
Debt	Debt On February 8, 2017, the Company entered into the Fourth Amended and Restated Credit Agreement (the "Credit Agreement"), by and among the Company and certain foreign subsidiaries, as Borrowers, various subsidiaries of the Company, as Guarantors, JPMorgan Chase Bank, N.A., as Administrative Agent, Sole Lead Arranger and Sole Bookrunner, and the other Lenders party thereto, which replaced the Third Amended and Restated Credit Agreement dated as of November 7, 2011, as previously amended (the "Prior Credit Agreement"). The Credit Agreement provides for a five-year senior secured revolving credit facility of $300.0 million that expires February 8, 2022 , which replaces the $250.0 million senior secured revolving credit facility under the Prior Credit Agreement. The new credit facility may be used for working capital, acquisitions, capital expenditures, issuances of letters of credit and other lawful purposes. Except as described in the paragraph below for the August 31, 2017 amendment, the Credit Agreement includes the following covenants and borrowing limitations: • Our Leverage Ratio, determined as of the end of each fiscal quarter, may not exceed 3.00 to 1.00 . • As with the Prior Credit Agreement, we are required to maintain a Fixed Charge Coverage Ratio, determined as of the end of each fiscal quarter, greater than or equal to 1.25 to 1.00 . • Asset dispositions (other than dispositions in which all of the net cash proceeds therefrom are reinvested into the Company and dispositions of inventory and obsolete or unneeded equipment in the ordinary course of business) are limited to $20.0 million per 12-month period. The new credit facility includes a sub-facility for revolving loans denominated in Australian Dollars, Canadian Dollars, Euros and Pounds Sterling in an aggregate amount not to exceed the U.S. Dollar equivalent of $75.0 million and a $200.0 million sublimit for letters of credit. Each revolving borrowing under the Credit Agreement will bear interest at a rate per annum equal to: • The ABR or the Adjusted LIBO Rate, in the case of revolving loans denominated in U.S. Dollars; • The Canadian Prime Rate or the CDOR rate, in the case of revolving loans denominated in Canadian Dollars; • The Adjusted LIBO Rate, in the case of revolving loans denominated in Pounds Sterling or Australian Dollars; or • The EURIBO Rate, in the case of revolving loans denominated in Euros, in each case, plus the Applicable Margin, which is based on the Company's Leverage Ratio. The Applicable Margin on ABR loans ranges between 0.625% and 1.625% . The Applicable Margin for Adjusted LIBO, EURIBO and CDOR loans ranges between 1.625% and 2.625% and the Applicable Margin for Canadian Prime Rate loans ranges between 2.125% and 3.125% . The unused credit facility fee is between 0.25% and 0.45% based on the Leverage Ratio. The 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 3.0 times Consolidated EBITDA, as defined in the Credit Agreement, over the previous four quarters. For the four quarters ended September 30, 2017 , Consolidated EBITDA was $34.0 million . Consolidated Funded Indebtedness at September 30, 2017 was $50.2 million . On August 31, 2017, the Company entered in to an amendment to its Credit Agreement, which provided the following: • The maximum permitted Leverage Ratio was temporarily increased to 4.00 to 1.00 for the quarters ending September 30, 2017, and December 31, 2017. The maximum Leverage Ratio will revert back to 3.00 to 1.00 beginning with the quarter ending March 31, 2018. • The Fixed Charge Coverage Ratio will not be tested for the quarters ending September 30, 2017 and December 31, 2017, but will be in effect and tested quarterly thereafter beginning with the quarter ending March 31, 2018. • A new minimum Consolidated EBITDA covenant was added solely for the four-quarter period ending December 31, 2017. For this period, the Company is required to achieve Consolidated EBITDA of $15.0 million . • The Restricted Payments covenant was amended to restrict cash dividends and share repurchases during the period beginning August 31, 2017 and ending December 31, 2017 to an aggregate basket of $5.0 million . In addition, during such period, both cash dividends and share repurchases are prohibited unless the pro forma Leverage Ratio is less than or equal to 2.50 to 1.00 . Thereafter, the restriction reverts back to limiting cash dividends to 50% of net income for each fiscal year, and limiting share repurchases to $30.0 million per calendar year. • An additional increased pricing tier was added for the "Covenant Relief Period" beginning on August 31, 2017 and ending on the date we deliver our financial statements and compliance certificate for the fiscal quarter ending December 31, 2017. If our Leverage Ratio as of any quarterly calculation date during the Covenant Relief Period exceeds 3.00 to 1.00: (1) the Applicable Margin on ABR loans will be 1.875% ; (2) the Applicable Margin for Adjusted LIBO, EURIBO and CDOR will be 2.875% ; (3) the Applicable Margin for Canadian Prime Rate loans will be 3.375% ; and (4) the unused credit facility fee will be 0.50% . Availability under the senior revolving credit facility at September 30, 2017 was as follows: September 30, June 30, (In thousands) Senior revolving credit facility $ 300,000 $ 300,000 Capacity constraint due to the Senior Leverage Ratio 164,084 169,092 Capacity under the credit facility 135,916 130,908 Borrowings outstanding 42,076 44,682 Letters of credit 8,133 7,825 Availability under the senior revolving credit facility $ 85,707 $ 78,401 Outstanding borrowings at September 30, 2017 under our Credit Agreement were primarily used to fund the acquisition of Houston Interests (See Note 2) and working capital needs in our Canadian business due to the timing of collections and disbursements on the previously announced Electrical Infrastructure project. At September 30, 2017 , the Company was in compliance with all affirmative, negative, and financial covenants under the Credit Agreement.

Income Taxes (Notes)

Income Taxes (Notes)	3 Months Ended
	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes We use the asset and liability approach for financial accounting and reporting for income taxes. Deferred income tax assets and liabilities are computed annually for differences between the financial statement and tax bases of assets and liabilities that will result in taxable or deductible amounts in the future based on enacted tax laws and rates applicable to the periods in which the differences are expected to affect taxable income. Valuation allowances based on our judgments and estimates are established when necessary to reduce deferred tax assets to the amount expected to be realized in future operating results. Company management believes that realization of deferred tax assets in excess of the valuation allowance is more likely than not. Our estimates are based on facts and circumstances in existence as well as interpretations of existing tax regulations and laws applied to the facts and circumstances. The Company provides for income taxes regardless of whether it has received a tax assessment. Taxes are provided when it is considered probable that additional taxes will be due in excess of amounts included in the tax return. The Company regularly reviews exposure to additional income taxes due, and as further information is known or events occur, adjustments may be recorded. Our effective tax rate for the three months ended September 30, 2017 was 44.5% compared to 33.6% in the same period last year. The effective tax rate in fiscal 2018 was negatively impacted by a higher mix of projected income in the U.S., which is a higher tax jurisdiction than the Company's foreign operations. In addition, the fiscal 2018 effective tax rate was negatively affected by a stock compensation tax adjustment of $0.5 million . The effective tax rate in fiscal 2017 was positively impacted by the projection of a higher mix of income in Canada, which has a lower tax rate relative to the U.S. In addition, the fiscal 2017 effective tax rate benefited from a favorable stock compensation tax adjustment of $0.4 million .

Commitments and Contingencies (

Commitments and Contingencies (Notes)	3 Months Ended
	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Insurance Reserves The Company maintains insurance coverage for various aspects of its operations. However, exposure to potential losses is retained through the use of deductibles, self-insured retentions and coverage limits. Typically our contracts require us to indemnify our customers for injury, damage or loss arising from the performance of our services and provide warranties for materials and workmanship. The Company may also be required to name the customer as an additional insured up to the limits of insurance available, or we may be required to purchase special insurance policies or surety bonds for specific customers or provide letters of credit in lieu of bonds to satisfy performance and financial guarantees on some projects. Matrix maintains a performance and payment bonding line sufficient to support the business. The Company generally requires its subcontractors to indemnify the Company and the Company’s customer and name the Company as an additional insured for activities arising out of the subcontractors’ work. We also require certain subcontractors to provide additional insurance policies, including surety bonds in favor of the Company, to secure the subcontractors’ work or as required by the subcontract. There can be no assurance that our insurance and the additional insurance coverage provided by our subcontractors will fully protect us against a valid claim or loss under the contracts with our customers. Unapproved Change Orders and Claims Costs and estimated earnings in excess of billings on uncompleted contracts included revenues for unapproved change orders and claims of $12.4 million at September 30, 2017 and $11.0 million at June 30, 2017 . Generally, collection of amounts related to unapproved change orders and claims is expected within twelve months. However, since customers may not pay these amounts until final resolution of related claims, collection of these amounts may extend beyond one year. Other The Company and its subsidiaries are participants in various legal actions. It is the opinion of management that none of the known legal actions will have a material impact on the Company’s financial position, results of operations or liquidity.

Earnings per Common Share (Note

Earnings per Common Share (Notes)	3 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Earnings per Common Share	Earnings per Common Share Basic earnings per share (“Basic EPS”) is calculated based on the weighted average shares outstanding during the period. Diluted earnings per share (“Diluted EPS”) includes the dilutive effect of stock options and nonvested deferred shares. The computation of basic and diluted earnings per share is as follows: Three Months Ended September 30, September 30, (In thousands, except per share data) Basic EPS: Net income $ 3,824 $ 9,342 Weighted average shares outstanding 26,655 26,387 Basic earnings per share $ 0.14 $ 0.35 Diluted EPS: Weighted average shares outstanding – basic 26,655 26,387 Dilutive stock options 10 50 Dilutive nonvested deferred shares 97 359 Diluted weighted average shares 26,762 26,796 Diluted earnings per share $ 0.14 $ 0.35 The following securities are considered antidilutive and have been excluded from the calculation of Diluted EPS: Three Months Ended September 30, September 30, (In thousands) Nonvested deferred shares 718 78

Segment Information (Notes)

Segment Information (Notes)	3 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
Segment Information	Segment Information We operate our business through four reportable segments: Electrical Infrastructure, Oil Gas & Chemical, Storage Solutions, and Industrial. The Electrical Infrastructure segment primarily encompasses high voltage services to investor owned utilities, including construction of new substations, upgrades of existing substations, short-run transmission line installations, distribution upgrades and maintenance, and storm restoration services. We also provide construction and maintenance services to a variety of power generation facilities, such as combined cycle plants, natural gas fired power stations, and renewable energy installations. The Oil Gas & Chemical segment includes turnaround activities, plant maintenance, engineering and construction in the downstream and midstream petroleum industries. Our customers in these industries are engaged in refining crude oil and processing, fractionating, and marketing of natural gas and natural gas liquids. Another key offering is industrial cleaning services, which include hydroblasting, hydroexcavating, chemical cleaning and vacuum services. We also perform work in the petrochemical, upstream petroleum, and sulfur extraction, recovery and processing markets. The Storage Solutions segment includes new construction of crude and refined products aboveground storage tanks (“ASTs”), as well as planned and emergency maintenance services. The Storage Solutions segment also includes balance of plant work in storage terminals and tank farms. Also included in the Storage Solutions segment is work related to specialty storage tanks, including liquefied natural gas (“LNG”), liquid nitrogen/liquid oxygen (“LIN/LOX”), liquid petroleum (“LPG”) tanks and other specialty vessels, including spheres. Finally, we offer AST products, including geodesic domes, aluminum internal floating roofs, floating suction and skimmer systems, roof drain systems and floating roof seals. The Industrial segment primarily includes construction and maintenance work in the iron and steel, mining and minerals, and agricultural industries. Our work in the mining and minerals industry is primarily for customers engaged in the extraction of copper. Our work in the agricultural industry includes the engineering and design of grain silos, docks and handling systems; the design of control system automation and materials handling for the food industry; and engineering, construction, process design and balance of plant work for fertilizer production facilities. We also perform work in bulk material handling, thermal vacuum chambers, and other industrial markets. The Company evaluates performance and allocates resources based on operating income. The accounting policies of the reportable segments are the same as those described in the Summary of Significant Accounting Policies footnote included in the Company’s Annual Report on Form 10-K for the year ended June 30, 2017 . Intersegment sales and transfers are recorded at cost; therefore, no intersegment profit or loss is recognized. Segment assets consist primarily of cash and cash equivalents, accounts receivable, costs and estimated earnings in excess of billings on uncompleted contracts, property, plant and equipment, goodwill and other intangible assets. Results of Operations (In thousands) Three Months Ended September 30, September 30, Gross revenues Electrical Infrastructure $ 79,971 $ 88,025 Oil Gas & Chemical 85,861 37,828 Storage Solutions 71,572 199,650 Industrial 33,271 22,727 Total gross revenues $ 270,675 $ 348,230 Less: Inter-segment revenues Oil Gas & Chemical $ 208 $ 5,286 Storage Solutions 557 128 Industrial — 1,035 Total inter-segment revenues $ 765 $ 6,449 Consolidated revenues Electrical Infrastructure $ 79,971 $ 88,025 Oil Gas & Chemical 85,653 32,542 Storage Solutions 71,015 199,522 Industrial 33,271 21,692 Total consolidated revenues $ 269,910 $ 341,781 Gross profit Electrical Infrastructure $ 8,267 $ 5,250 Oil Gas & Chemical 11,038 1 Storage Solutions 7,540 26,453 Industrial 2,046 574 Total gross profit $ 28,891 $ 32,278 Operating income (loss) Electrical Infrastructure $ 3,577 $ 1,057 Oil Gas & Chemical 4,134 (2,905 ) Storage Solutions (75 ) 16,773 Industrial (315 ) (624 ) Total operating income $ 7,321 $ 14,301 Total assets by segment were as follows: September 30, June 30, Electrical Infrastructure $ 186,094 $ 183,351 Oil Gas & Chemical 137,631 129,177 Storage Solutions 143,648 166,742 Industrial 61,748 53,754 Unallocated assets 43,333 53,006 Total segment assets $ 572,454 $ 586,030

Acquisitions (Tables)

Acquisitions (Tables) - Houston Interests, LLC [Member]	3 Months Ended
	Sep. 30, 2017
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Consideration transferred [Table Text Block]	The Company purchased all of the equity interests of Houston Interests for $42.5 million in cash, net of working capital adjustments and cash acquired. The consideration paid is as follows (in thousands): Cash paid for equity interest $ 46,000 Cash paid for working capital 6,837 Less: cash acquired (10,331 ) Net purchase price $ 42,506
Schedule of Preliminary Purchase Price Allocation	The following table summarizes the preliminary net purchase price allocation (in thousands): Cash $ 10,331 Accounts receivable 10,273 Costs and estimated earnings in excess of billings on uncompleted contracts 746 Other current assets 454 Current assets 21,804 Property, plant and equipment 942 Goodwill 35,146 Other intangible assets 10,220 Total assets acquired 68,112 Accounts payable 962 Billings on uncompleted contracts in excess of costs and estimated earnings 11,648 Other accrued expenses 2,475 Current liabilities 15,085 Other liabilities 190 Net assets acquired 52,837 Less: cash acquired 10,331 Net purchase price $ 42,506
Pro Forma Information	The unaudited financial information in the table below summarizes the combined results of operations of Matrix Service Company and Houston Interests for the three months ended September 30, 2017 and 2016, on a pro forma basis, as though the companies had been combined as of July 1, 2015. The pro forma financial information presented in the table below is for informational purposes only and is not indicative of the results of operations that would have been achieved if the acquisition had taken place at July 1, 2015 nor should it be taken as indicative of future consolidated results of operations. Three Months Ended September 30, 2017 September 30, 2016 (In thousands, except per share data) Revenues $ 269,910 $ 378,494 Net income $ 3,824 $ 10,788 Basic earnings per common share $ 0.14 $ 0.41 Diluted earnings per common share $ 0.14 $ 0.40

Uncompleted Contracts (Tables)

Uncompleted Contracts (Tables)	3 Months Ended
	Sep. 30, 2017
Disclosure Customer Contracts Additional Information [Abstract]
Gross and Net Amount of Uncompleted Contracts	Gross and net amounts on uncompleted contracts are as follows: September 30, June 30, (in thousands) Costs incurred and estimated earnings recognized on uncompleted contracts $ 1,451,623 $ 1,919,054 Billings on uncompleted contracts 1,451,229 1,903,001 $ 394 $ 16,053 Shown in balance sheet as: Costs and estimated earnings in excess of billings on uncompleted contracts $ 65,953 $ 91,180 Billings on uncompleted contracts in excess of costs and estimated earnings 65,559 75,127 $ 394 $ 16,053

Intangible Assets Including G21

Intangible Assets Including Goodwill (Tables)	3 Months Ended
	Sep. 30, 2017
Finite-Lived Intangible Assets [Line Items]
Carrying Value of Goodwill by Segment	The changes in the carrying value of goodwill by segment are as follows: Electrical Infrastructure Oil Gas & Chemical Storage Solutions Industrial Total (In thousands) Net balance at June 30, 2017 $ 42,152 $ 33,604 $ 16,764 $ 20,981 $ 113,501 Translation adjustment (1) 234 — 81 44 359 Net balance at September 30, 2017 $ 42,386 $ 33,604 $ 16,845 $ 21,025 $ 113,860 (1) The translation adjustments relate to the periodic translation of Canadian Dollar and South Korean Won denominated goodwill recorded as a part of prior acquisitions in Canada and South Korea, in which the local currency was determined to be the functional currency.
Carrying Value of Other Intangible Assets	Information on the carrying value of other intangible assets is as follows: At September 30, 2017 Useful Life Gross Carrying Amount Accumulated Amortization Net Carrying Amount (Years) (In thousands) Intellectual property 9 to 15 $ 2,579 $ (1,469 ) $ 1,110 Customer-based 1 to 15 38,376 (14,913 ) 23,463 Non-compete agreements 4 to 5 1,453 (1,352 ) 101 Trade names 1 to 3 1,630 (1,473 ) 157 Total amortizing intangible assets $ 44,038 $ (19,207 ) $ 24,831 At June 30, 2017 Useful Life Gross Carrying Amount Accumulated Amortization Net Carrying Amount (Years) (In thousands) Intellectual property 9 to 15 $ 2,579 $ (1,425 ) $ 1,154 Customer-based 1 to 15 38,207 (13,543 ) 24,664 Non-compete agreements 4 to 5 1,453 (1,298 ) 155 Trade names 1 to 3 1,630 (1,307 ) 323 Total amortizing intangible assets $ 43,869 $ (17,573 ) $ 26,296
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	Period ending: Remainder of Fiscal 2018 $ 4,092 Fiscal 2019 3,522 Fiscal 2020 3,505 Fiscal 2021 3,445 Fiscal 2022 2,337 Fiscal 2023 2,045 Thereafter 5,885 Total estimated remaining amortization expense at September 30, 2017 $ 24,831

Debt (Tables)

Debt (Tables)	3 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
Availability Under the Senior Credit Facility	Availability under the senior revolving credit facility at September 30, 2017 was as follows: September 30, June 30, (In thousands) Senior revolving credit facility $ 300,000 $ 300,000 Capacity constraint due to the Senior Leverage Ratio 164,084 169,092 Capacity under the credit facility 135,916 130,908 Borrowings outstanding 42,076 44,682 Letters of credit 8,133 7,825 Availability under the senior revolving credit facility $ 85,707 $ 78,401

Earnings per Common Share (Tabl

Earnings per Common Share (Tables)	3 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings Per Share	The computation of basic and diluted earnings per share is as follows: Three Months Ended September 30, September 30, (In thousands, except per share data) Basic EPS: Net income $ 3,824 $ 9,342 Weighted average shares outstanding 26,655 26,387 Basic earnings per share $ 0.14 $ 0.35 Diluted EPS: Weighted average shares outstanding – basic 26,655 26,387 Dilutive stock options 10 50 Dilutive nonvested deferred shares 97 359 Diluted weighted average shares 26,762 26,796 Diluted earnings per share $ 0.14 $ 0.35
Antidilutive Securities Excluded from the Calculation of Diluted EPS	The following securities are considered antidilutive and have been excluded from the calculation of Diluted EPS: Three Months Ended September 30, September 30, (In thousands) Nonvested deferred shares 718 78

Segment Information (Tables)

Segment Information (Tables)	3 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
Results of Operations	Results of Operations (In thousands) Three Months Ended September 30, September 30, Gross revenues Electrical Infrastructure $ 79,971 $ 88,025 Oil Gas & Chemical 85,861 37,828 Storage Solutions 71,572 199,650 Industrial 33,271 22,727 Total gross revenues $ 270,675 $ 348,230 Less: Inter-segment revenues Oil Gas & Chemical $ 208 $ 5,286 Storage Solutions 557 128 Industrial — 1,035 Total inter-segment revenues $ 765 $ 6,449 Consolidated revenues Electrical Infrastructure $ 79,971 $ 88,025 Oil Gas & Chemical 85,653 32,542 Storage Solutions 71,015 199,522 Industrial 33,271 21,692 Total consolidated revenues $ 269,910 $ 341,781 Gross profit Electrical Infrastructure $ 8,267 $ 5,250 Oil Gas & Chemical 11,038 1 Storage Solutions 7,540 26,453 Industrial 2,046 574 Total gross profit $ 28,891 $ 32,278 Operating income (loss) Electrical Infrastructure $ 3,577 $ 1,057 Oil Gas & Chemical 4,134 (2,905 ) Storage Solutions (75 ) 16,773 Industrial (315 ) (624 ) Total operating income $ 7,321 $ 14,301 Total assets by segment were as follows: September 30, June 30, Electrical Infrastructure $ 186,094 $ 183,351 Oil Gas & Chemical 137,631 129,177 Storage Solutions 143,648 166,742 Industrial 61,748 53,754 Unallocated assets 43,333 53,006 Total segment assets $ 572,454 $ 586,030

Acquisitions (Details)

Acquisitions (Details) - USD ($) $ in Thousands	Dec. 12, 2016	Sep. 30, 2017	Jun. 30, 2017
Business Acquisition [Line Items]
Goodwill		$ 113,860	$ 113,501
Houston Interests, LLC [Member]
Business Acquisition [Line Items]
Cash paid for equity interest	$ 46,000
Acquisition related adjustment for working capital settlement	6,837
Accounts Receivable	10,273
Costs and estimated earnings in excess of billings on uncompleted contracts	746
Other current assets	454
Current assets	21,804
Property, plant and equipment	942
Goodwill	35,146
Other intangible assets	10,220
Total assets acquired	68,112
Accounts payable	962
Billings on uncompleted contracts in excess of costs and estimated earnings	11,648
Other accrued expenses	2,475
Current liabilities	15,085
Other liabilities	190
Net assets acquired	52,837
Less: cash acquired	10,331
Business Combination, Consideration Transferred	$ 42,506
Warranty reserve working capital provision		2,600
Settlement of warranty reserve		$ 1,700

Acquisitions (Narrative) (Detai

Acquisitions (Narrative) (Details) - Houston Interests, LLC [Member] $ in Thousands	Dec. 12, 2016USD ($)
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition	Dec. 12, 2016
Business Acquisition, Name of Acquired Entity	Houston Interests, LLC
Business Combination, Consideration Transferred	$ 42,506

Acquisitions Pro Forma (Details

Acquisitions Pro Forma (Details) - Houston Interests, LLC [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Business Acquisition [Line Items]
Revenues	$ 269,910	$ 378,494
Net income attributable to Matrix Service Company	$ 3,824	$ 10,788
Basic earnings per common share	$ 0.14	$ 0.41
Diluted earnings per common share	$ 0.14	$ 0.40

Acquisitions Pro Forma Narrativ

Acquisitions Pro Forma Narrative (Details) - Houston Interests, LLC [Member] $ in Millions	3 Months Ended
	Sep. 30, 2016USD ($)
Business Acquisition [Line Items]
Pro forma acquisition costs, amortized over time	$ 0.3
Pro forma interest expense	0.4
Pro forma depreciation and amortization expense	0.1
Pro forma income tax expense	$ 1.9

Uncompleted Contracts - Gross a

Uncompleted Contracts - Gross and Net Amounts of Uncompleted Contracts (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Jun. 30, 2017
Disclosure Customer Contracts Additional Information [Abstract]
Costs incurred and estimated earnings recognized on uncompleted contracts	$ 1,451,623	$ 1,919,054
Billings on uncompleted contracts	1,451,229	1,903,001
Total	394	16,053
Shown on balance sheet as:
Costs and estimated earnings in excess of billings on uncompleted contracts	65,953	91,180
Billings on uncompleted contracts in excess of costs and estimated earnings	65,559	75,127
Total	$ 394	$ 16,053

Uncompleted Contracts - Additio

Uncompleted Contracts - Additional Information (Detail) - USD ($) $ in Millions	Sep. 30, 2017	Jun. 30, 2017
Customer Contracts [Line Items]
Contract Receivable Retainage, Due in Next Twelve Months	$ 43.7	$ 54.3
Contract Receivable Retainage, Due after Next Twelve Months	$ 3.5	$ 1.9

Intangible Assets Including G31

Intangible Assets Including Goodwill - Carrying Value of Goodwill By Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2017	May 31, 2017	Dec. 12, 2016
Goodwill [Line Items]
Goodwill	$ 113,501
Goodwill [Roll Forward]
Net balance at June 30, 2015	113,501
Translation adjustment	359
Net balance at September 30, 2017	113,860
Electrical Infrastructure [Member]
Goodwill [Line Items]
Goodwill	42,152
Goodwill [Roll Forward]
Net balance at June 30, 2015	42,152
Translation adjustment	234
Net balance at September 30, 2017	42,386
Oil Gas & Chemical [Member]
Goodwill [Line Items]
Goodwill	33,604
Goodwill [Roll Forward]
Net balance at June 30, 2015	33,604
Translation adjustment	0
Net balance at September 30, 2017	33,604
Storage Solutions [Member]
Goodwill [Line Items]
Goodwill	16,764
Goodwill [Roll Forward]
Net balance at June 30, 2015	16,764
Translation adjustment	81
Net balance at September 30, 2017	16,845
Industrial [Member]
Goodwill [Line Items]
Goodwill	20,981
Goodwill [Roll Forward]
Net balance at June 30, 2015	20,981
Translation adjustment	44
Net balance at September 30, 2017	$ 21,025
Reporting Unit [Member]
Goodwill [Line Items]
Goodwill		$ 8,000
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount		9.00%
Houston Interests, LLC [Member]
Goodwill [Line Items]
Goodwill			$ 35,146

Intangible Assets Including G32

Intangible Assets Including Goodwill - Carrying Value of Other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Jun. 30, 2017
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 44,038		$ 43,869
Accumulated Amortization	(19,207)		(17,573)
Net Carrying Amount	24,831		26,296
Total intangible assets, net carrying amount	24,831		26,296
Amortization expense	1,600	$ 800
Intellectual Property [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	2,579		2,579
Accumulated Amortization	(1,469)		(1,425)
Net Carrying Amount	$ 1,110		1,154
Intellectual Property [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	9 years	9 years
Intellectual Property [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years	15 years
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 38,376		38,207
Accumulated Amortization	(14,913)		(13,543)
Net Carrying Amount	$ 23,463		24,664
Customer Relationships [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	1 year	1 year 6 months
Customer Relationships [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years	15 years
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 1,453		1,453
Accumulated Amortization	(1,352)		(1,298)
Net Carrying Amount	$ 101		155
Noncompete Agreements [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	4 years	4 years
Noncompete Agreements [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years	5 years
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 1,630		1,630
Accumulated Amortization	(1,473)		(1,307)
Net Carrying Amount	$ 157		$ 323
Trade Names [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	1 year	3 years
Trade Names [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	3 years	5 years

Intangible Assets Including G33

Intangible Assets Including Goodwill - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Jun. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense	$ 1,600	$ 800
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	44,038		$ 43,869
Intellectual Property [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	2,579		2,579
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	38,376		38,207
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	1,453		1,453
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 1,630		$ 1,630
Minimum [Member] | Intellectual Property [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	9 years	9 years
Minimum [Member] | Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	1 year	1 year 6 months
Minimum [Member] | Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	4 years	4 years
Minimum [Member] | Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	1 year	3 years
Maximum [Member] | Intellectual Property [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years	15 years
Maximum [Member] | Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years	15 years
Maximum [Member] | Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years	5 years
Maximum [Member] | Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	3 years	5 years

Intangible Assets Including G34

Intangible Assets Including Goodwill Future Expected Amortization Expense (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Jun. 30, 2017
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	$ 4,092
Finite-Lived Intangible Assets, Amortization Expense, Next Year	3,522
Finite-Lived Intangible Assets, Amortization Expense, Year Two	3,505
Finite-Lived Intangible Assets, Amortization Expense, Year Three	3,445
Finite-Lived Intangible Assets, Amortization Expense, Year Four	2,337
Finite-Lived Intangible Assets, Amortization Expense, Year Five	2,045
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	5,885
Finite-Lived Intangible Assets, Net	$ 24,831	$ 26,296

Debt - Additional Information (

Debt - Additional Information (Detail) $ in Thousands	3 Months Ended
	Sep. 30, 2017USD ($)Rate	Jun. 30, 2017USD ($)	Dec. 31, 2016USD ($)
Credit Agreement Terms
Senior secured revolving credit facility | $	$ 300,000	$ 300,000	$ 250,000
Line Of Credit Facility Expiration Date	Feb. 8, 2022
Senior Leverage Ratio, Maximum	3
Senior Leverage Ratio, Minimum	1
Fixed Charge Coverage Ratio, Maximum	1.25
Fixed Charge Coverage Ratio, Minimum	1
Amount of Limit on Asset Dispositions | $	$ 20,000
Additional Margin on alternate base rate loans, Minimum	0.625%
Additional Margin on alternate base rate loans, Maximum	1.625%
Sublimit on Australian Dollar, Canadian Dollar, Euro and Pounds Sterling | $	$ 75,000
Sub-limit on letters of credit under the credit facility | $	$ 200,000
Additional Margin on Adjusted LIBO, EURIBO and CDOR loans, Minimum	1.625%
Additional Margin on Adjusted LIBO, EURIBO and CDOR loans, Maximum	2.625%
Additional Margin on Canadian prime rate loans, Minimum	2.125%
Additional Margin on Canadian prime rate loans, Maximum	3.125%
Consolidated EBITDA as defined in the Credit Agreement | $	$ 34,000
Consolidated funded indebtedness | $	$ 50,200
Dividend Restriction Under Credit Agreement, Percent	100.00%
Dividend Restriction Under Credit Agreement, Amount | $	$ 30,000
Minimum [Member]
Credit Agreement Terms
Unused Credit Facility Fee	0.25%
Maximum [Member]
Credit Agreement Terms
Unused Credit Facility Fee	0.45%
Debt Amendment [Member]
Credit Agreement Terms
Senior Leverage Ratio, Maximum	4
Senior Leverage Ratio, Minimum	1
Additional Margin on alternate base rate loans, Maximum	1.875%
Additional Margin on Adjusted LIBO, EURIBO and CDOR loans, Maximum	2.875%
Additional Margin on Canadian prime rate loans, Maximum	3.375%
Minimum Consolidated EBITDA Required | $	$ 15,000
Restricted Payments Under Credit Amendment | $	$ 5,000
Leverage Ratio Allowed for Restricted Payments, Maximum	2.50
Leverage Ratio Allowed for Restricted Payments, Minimum	1
Debt Amendment [Member] | Maximum [Member]
Credit Agreement Terms
Unused Credit Facility Fee	0.50%

Debt - Availability Under The S

Debt - Availability Under The Senior Credit Facility (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Debt Disclosure [Abstract]
Senior credit facility	$ 300,000	$ 300,000	$ 250,000
Capacity Constraint Due To Senior Leverage Ratio	164,084	169,092
Line Of Credit Facility Maximum Borrowing Capacity After Consideration Of Capacity Constraint	135,916	130,908
Line of Credit Facility, Amount Outstanding	42,076	44,682
Letters of credit subject to the credit facility	8,133	7,825
Availability under the senior credit facility	$ 85,707	$ 78,401

Income Taxes Income Taxes (Deta

Income Taxes Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent	44.50%	33.60%
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	$ 0.5	$ 0.4

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	Sep. 30, 2017	Jun. 30, 2017
Power Generation Project Unapproved Change Orders and Claims [Line Items]
Unapproved change orders and claims	$ 12.4	$ 11

Earnings per Common Share - Com

Earnings per Common Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share, Basic [Abstract]
Net income	$ 3,824	$ 9,342
Weighted average shares outstanding - basic (shares)	26,655	26,387
Basic EPS (US$ per share)	$ 0.14	$ 0.35
Earnings Per Share, Diluted [Abstract]
Dilutive stock options	10	50
Dilutive nonvested deferred shares	97	359
Diluted weighted average shares (shares)	26,762	26,796
Diluted EPS (US$ per share)	$ 0.14	$ 0.35

Earnings per Common Share - Ant

Earnings per Common Share - Antidilutive Securities Excluded from the Calculation of Diluted Earnings Per Share (Details) - shares shares in Thousands	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Nonvested Deferred Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total antidilutive securities	718	78

Segment Information - Results o

Segment Information - Results of Operations (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Jun. 30, 2017
Segment Reporting Information [Line Items]
Gross revenues	$ 270,675	$ 348,230
Revenues	269,910	341,781
Gross profit	28,891	32,278
Operating income	7,321	14,301
Segment assets	572,454		$ 586,030
Goodwill	113,860		113,501
Electrical Infrastructure [Member]
Segment Reporting Information [Line Items]
Gross revenues	79,971	88,025
Revenues	79,971	88,025
Gross profit	8,267	5,250
Operating income	3,577	1,057
Segment assets	186,094		183,351
Goodwill	42,386		42,152
Oil Gas & Chemical [Member]
Segment Reporting Information [Line Items]
Gross revenues	85,861	37,828
Revenues	85,653	32,542
Gross profit	11,038	1
Operating income	4,134	(2,905)
Segment assets	137,631		129,177
Goodwill	33,604		33,604
Storage Solutions [Member]
Segment Reporting Information [Line Items]
Gross revenues	71,572	199,650
Revenues	71,015	199,522
Gross profit	7,540	26,453
Operating income	(75)	16,773
Segment assets	143,648		166,742
Goodwill	16,845		16,764
Industrial [Member]
Segment Reporting Information [Line Items]
Gross revenues	33,271	22,727
Revenues	33,271	21,692
Gross profit	2,046	574
Operating income	(315)	(624)
Segment assets	61,748		53,754
Goodwill	21,025		20,981
Other Segments [Member]
Segment Reporting Information [Line Items]
Segment assets	43,333		$ 53,006
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Gross revenues	765	6,449
Intersegment Eliminations [Member] | Oil Gas & Chemical [Member]
Segment Reporting Information [Line Items]
Gross revenues	208	5,286
Intersegment Eliminations [Member] | Storage Solutions [Member]
Segment Reporting Information [Line Items]
Gross revenues	557	128
Intersegment Eliminations [Member] | Industrial [Member]
Segment Reporting Information [Line Items]
Gross revenues	$ 0	$ 1,035