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Cover Page - shares	3 Months Ended
Cover Page - shares	Sep. 30, 2019	Nov. 05, 2019
Cover page.
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	5100 East Skelly Drive, Suite 500
Entity File Number	1-15461
Security Exchange Name	NASDAQ
Title of 12(b) Security	Common Stock, par value $0.01 per share
Document Transition Report	false
Document Quarterly Report	true
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2019
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Trading Symbol	MTRX
Entity Registrant Name	MATRIX SERVICE CO
Entity Central Index Key	0000866273
Current Fiscal Year End Date	--06-30
Entity Filer Category	Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding		27,162,327
Entity Address, City or Town	Tulsa
Entity Address, State or Province	OK
Entity Address, Postal Zip Code	74135
City Area Code	918
Local Phone Number	838-8822
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Entity Tax Identification Number	73-1352174

Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Revenues	$ 338,097	$ 318,511
Cost of revenues	305,632	295,090
Gross profit	32,465	23,421
Selling, general and administrative expenses	23,691	21,201
Operating income	8,774	2,220
Other income (expense):
Interest expense	(389)	(292)
Interest income	474	282
Other	3	546
Income before income tax expense	8,862	2,756
Provision for federal, state and foreign income taxes	2,711	451
Net income	$ 6,151	$ 2,305
Basic earnings per common share (US$ per share)	$ 0.23	$ 0.09
Diluted earnings per common share (US$ per share)	$ 0.22	$ 0.08
Weighted average common shares outstanding:
Basic (shares)	26,935	26,921
Diluted (shares)	27,575	27,589

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 6,151	$ 2,305
Other comprehensive income (loss), net of tax:
Foreign currency translation gain (loss) (net of tax expense (benefit) of ($22) and $62 for the three months ended September 30, 2019 and 2018, respectively)	(394)	401
Comprehensive income	$ 5,757	$ 2,706

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

+ References

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+ Details

Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	$ (22)	$ 62

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Jun. 30, 2019
Current assets:
Cash and cash equivalents	$ 139,889	$ 89,715
Accounts receivable, less allowances (September 30, 2019— $1,091 and June 30, 2019—$923)	214,614	218,432
Costs and estimated earnings in excess of billings on uncompleted contracts	65,996	96,083
Inventories	7,561	8,017
Income taxes receivable	1,337	29
Other current assets	9,969	5,034
Total current assets	439,366	417,310
Property, plant and equipment at cost:
Land and buildings	41,057	41,179
Construction equipment	92,142	91,793
Transportation equipment	55,179	52,526
Office equipment and software	44,164	43,632
Construction in progress	7,563	7,619
Property, plant and equipment at cost, gross	240,105	236,749
Accumulated depreciation	(158,589)	(157,414)
Property, plant and equipment at cost, net	81,516	79,335
Operating lease right-of-use assets	23,595	0
Goodwill	93,300	93,368
Other intangible assets	18,516	19,472
Deferred income taxes	2,719	2,683
Other assets	13,742	21,226
Total assets	672,754	633,394
Current liabilities:
Accounts payable	96,984	114,647
Billings on uncompleted contracts in excess of costs and estimated earnings	130,191	105,626
Accrued wages and benefits	34,214	38,357
Accrued insurance	9,539	9,021
Operating lease liabilities	8,660	0
Income taxes payable	0	2,517
Other accrued expenses	5,721	5,331
Total current liabilities	285,309	275,499
Deferred income taxes	2,346	298
Operating lease liabilities	15,998	0
Borrowings under senior secured revolving credit facility	11,366	5,347
Other liabilities	308	293
Total liabilities	315,327	281,437
Commitments and contingencies
Matrix Service Company stockholders' equity:
Common stock—$.01 par value; 60,000,000 shares authorized; 27,888,217 shares issued as of September 30, 2019 and June 30, 2019; 27,131,446 and 26,807,203 shares outstanding as of September 30, 2019 and June 30, 2019	279	279
Additional paid-in capital	132,936	137,712
Retained earnings	245,627	239,476
Accumulated other comprehensive loss	(8,145)	(7,751)
Matrix Service Company stockholders' equity	370,697	369,716
Less: Treasury stock, at cost — 756,771 shares as of September 30, 2019, and 1,081,014 shares as of June 30, 2019	(13,270)	(17,759)
Total stockholders' equity	357,427	351,957
Total liabilities and stockholders’ equity	$ 672,754	$ 633,394

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2019	Jun. 30, 2019
Statement Condensed Consolidated Balance Sheets [Abstract]
Accounts receivable, allowances	$ 1,091	$ 923
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	27,131,446	26,807,203
Treasury stock, shares	756,771	1,081,014

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Operating activities:
Net income	$ 6,151	$ 2,305
Adjustments to reconcile net income to net cash provided by operating activities, net of effects from acquisitions and disposals:
Depreciation and amortization	4,779	4,543
Stock-based compensation expense	3,024	2,585
Deferred income tax	1,990	362
Gain on disposal of business	0	(427)
Gain on sale of property, plant and equipment	(93)	(171)
Provision for uncollectible accounts	224	76
Other	84	101
Changes in operating assets and liabilities increasing (decreasing) cash, net of effects from acquisitions and disposals:
Accounts receivable	3,594	(11,284)
Costs and estimated earnings in excess of billings on uncompleted contracts	30,087	302
Inventories	456	(1,369)
Other assets and liabilities	(297)	(10,860)
Accounts payable	(15,240)	15,261
Billings on uncompleted contracts in excess of costs and estimated earnings	24,565	(2,229)
Accrued expenses	(3,220)	9,624
Net cash provided by operating activities	56,104	8,819
Investing activities:
Capital expenditures	(8,684)	(2,482)
Proceeds from disposal of business	0	3,693
Proceeds from asset sales	151	267
Net cash provided (used) by investing activities	(8,533)	1,478
Financing activities:
Advances under senior secured revolving credit facility	8,984	2,298
Repayments of advances under senior secured revolving credit facility	(2,872)	(765)
Issuances of common stock	0	128
Proceeds from issuance of common stock under employee stock purchase plan	83	78
Repurchase of common stock for payment of statutory taxes due on equity-based compensation	(3,394)	(1,559)
Net cash provided by financing activities	2,801	180
Effect of exchange rate changes on cash and cash equivalents	(198)	202
Increase in cash and cash equivalents	50,174	10,679
Cash and cash equivalents, beginning of period	89,715	64,057
Cash and cash equivalents, end of period	139,889	74,736
Supplemental disclosure of cash flow information:
Income taxes	5,069	66
Interest	417	456
Non-cash investing and financing activities:
Purchases of property, plant and equipment on account	$ 263	$ 274

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)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Jun. 30, 2018	$ 318,843	$ 279	$ 132,198	$ 211,494	$ (17,717)	$ (7,411)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,305	0	0	2,305	0	0
Other comprehensive income (loss)	401	0	0	0	0	401
Exercise of stock options	128	0	(126)	0	254	0
Treasury shares sold to Employee Stock Purchase Plan	78	0	(4)	0	82	0
Issuance of deferred shares	0	0	(4,768)	0	4,768	0
Other Treasury Share Purchases	(1,559)	0	0	0	(1,559)	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Sep. 30, 2018	322,781	279	129,885	213,799	(14,172)	(7,010)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	2,585	0	2,585	0	0	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Jun. 30, 2019	351,957	279	137,712	239,476	(17,759)	(7,751)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	6,151	0	0	6,151	0	0
Other comprehensive income (loss)	(394)	0	0	0	0	(394)
Treasury shares sold to Employee Stock Purchase Plan	83	0	13	0	70	0
Issuance of deferred shares	0	0	(7,813)	0	7,813	0
Other Treasury Share Purchases	(3,394)	0	0	0	(3,394)	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Sep. 30, 2019	357,427	279	132,936	245,627	(13,270)	(8,145)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	$ 3,024	$ 0	$ 3,024	$ 0	$ 0	$ 0

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

+ References

+ Details

Condensed Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - shares	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Employee Stock Purchase Plan, shares	4,053	4,323
Exercise of stock options, shares	0	12,500
Issuance of deferred shares, shares	494,274	221,775
Other treasury shares purchases, shares	174,084	72,604

Basis of Presentation (Notes)	3 Months Ended
Basis of Presentation (Notes)	Sep. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation and Significant Accounting Policies Basis of Presentation 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 ("GAAP") 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, 2019, 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, 2019 may not necessarily be indicative of the results of operations for the full year ending June 30, 2020. Significant Accounting Policies The Company has updated its significant accounting policies to include its lease accounting policy as a result of adopting the Financial Accounting Standards Board ("FASB") Accounting Standards Update ("ASU") No. 2016-02, Leases (Topic 842) on July 1, 2019. The Company's other significant accounting policies are detailed in “Note 1 - Summary of Significant Accounting Policies” of our Annual Report on Form 10-K for the year ended June 30, 2019. Leases Adoption of New Leases Standard In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842). Under this guidance, lessees are required to recognize virtually all leases on the balance sheet as a right-of-use asset and an associated operating lease liability or finance lease liability. The right-of-use asset represents the lessee's right to use, or control the use of, a specified asset for the specified lease term. The lease liability represents the lessee's obligation to make lease payments arising from the lease, measured on a discounted basis. Based on certain characteristics, leases are classified as operating leases or finance leases. Operating lease liabilities and right-of-use assets are adjusted to result in a single straight-line lease expense over the life of the lease. Finance lease liabilities and right-of-use assets, which contain provisions similar to capital leases under the prior accounting standards, result in the recognition of interest expense on the lease liability and amortization expense on the right-of-use asset over the term of the lease. On July 1, 2019, the Company adopted the standard using the modified retrospective method. The modified retrospective method permits the Company to record right-of-use assets and lease liabilities for existing leases as of the date of adoption rather than at the beginning of the earliest period presented. The Company recorded operating lease right-of-use assets of $24.6 million and operating lease liabilities of $25.8 million as of July 1, 2019. The adoption of the standard did not have a material impact on the Company’s retained earnings, Condensed Consolidated Statements of Income or Condensed Consolidated Statements of Cash Flows. Financial results reported in prior periods are unchanged and reflect the prior lease accounting standards in place at the time. The Company elected the package of practical expedients permitted under the transition guidance for the new standard, which among other things, allowed the Company to carry forward the historical lease classification of its existing leases. All of the Company's existing leases were classified as operating leases prior to adoption and have retained this classification after adoption. In addition, the Company elected not to utilize the hindsight practical expedient to determine the lease term for existing leases at adoption. Lease Accounting Policy The Company enters into lease arrangements for real estate, construction equipment and information technology equipment in the normal course of business. The Company determines if an arrangement is or contains a lease at inception of the arrangement. An arrangement is determined to be a lease if it conveys the right to control the use of identified property or equipment for a period of time in exchange for consideration. If certain criteria are satisfied, the lease is classified as a financing lease. If none of these criteria are satisfied, the lease is considered an operating lease. All of the Company's leases are classified as operating leases. Operating lease right-of-use assets are recognized as the present value of future lease payments over the lease term as of the commencement date, plus any lease payments made prior to commencement, and less any lease incentives received. Operating right-of-use assets are presented as noncurrent in the Condensed Consolidated Balance Sheets. Operating lease liabilities are recognized as the present value of the future lease payments over the lease term as of the commencement date and are presented as current and noncurrent in the Condensed Consolidated Balance Sheets. The Company has elected not to recognize right-of-use assets and lease liabilities for short-term leases with an initial term of 12 months or less. The lease term used to measure the right-of-use assets and lease liabilities is generally the non-cancelable lease term for real estate leases and information technology equipment. Construction equipment is typically rented on a "month-to-month" basis and the lease term is estimated based on the expected duration of the rental. An option to renew or terminate a lease is included in the lease term when it is reasonably certain that the Company will exercise the option. Renewal options for real estate leases are typically for five years or less. Future lease payments are discounted based on the Company's estimate of its incremental borrowing rate at lease commencement. The incremental borrowing rate is the rate of interest that the Company would have to pay to borrow on a collateralized basis over a similar term an amount equal to the lease payments. Determinations with respect to lease term, including any renewals, incremental borrowing rate, and future lease payments require the use of judgment based on the facts and circumstances related to each lease. The Company considers various factors, including economic incentives, intent, past history and business need, to determine the likelihood that a renewal option will be exercised. After the commencement date, operating lease expense is recognized based on the undiscounted future lease payments over the remaining lease term on a straight-line basis. Lease expense related to short-term leases is recognized on a straight-line basis over the lease term. Lease expense is included in cost of revenue and in selling, general and administrative expenses in the Condensed Consolidated Statements of Income. See Note 3 - Leases for the required periodic disclosures about the Company's leases. Recently Issued Accounting Standards 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 credit losses, including those related to its trade accounts receivable. 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 Company will adopt these amendments on July 1, 2020. 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 will have a material impact on its estimate of the allowance for uncollectible accounts.

Revenue Revenue (Notes)

3 Months Ended

Sep. 30, 2019

Revenue from Contract with Customer [Abstract]

Revenue from Contract with Customer [Text Block]

Revenue

Remaining Performance Obligations

The Company had $756.7 million of remaining performance obligations yet to be satisfied as of September 30, 2019. The Company expects to recognize approximately $637.6 million of its remaining performance obligations as revenue within the next twelve months.

Contract Balances

Contract terms with customers include the timing of billing and payment, which usually differs from the timing of revenue recognition. As a result, we carry contract assets and liabilities in our balance sheet. These contract assets and liabilities are calculated on a contract-by-contract basis and reported on a net basis at the end of each period and are classified as current. We present our contract assets in the balance sheet as Costs and Estimated Earnings in Excess of Billings on Uncompleted Contracts ("CIE"). CIE consists of revenue recognized in excess of billings. We present our contract liabilities in the balance sheet as Billings on Uncompleted Contracts in Excess of Costs and Estimated Earnings ("BIE"). BIE consists of advance payments and billings in excess of revenue recognized. The following table provides information about CIE and BIE:



	September 30, 2019			June 30, 2019			Change
	(in thousands)
Costs and estimated earnings in excess of billings on uncompleted contracts	$	65,996		$	96,083		$	(30,087	)
Billings on uncompleted contracts in excess of costs and estimated earnings	(130,191		)	(105,626		)	(24,565		)
Net contract liabilities	$	(64,195	)	$	(9,543	)	$	(54,652	)

The difference between the beginning and ending balances of the Company's CIE and BIE primarily results from the timing of revenue recognized relative to its billings. The amount of revenue recognized during the three months ended September 30, 2019 that was included in the prior period BIE balance was $72.0 million. This revenue consists primarily of work performed during the period on contracts with customers that had advance billings.

Progress billings in accounts receivable at September 30, 2019 and June 30, 2019 included retentions to be collected within one year of $31.3 million and $21.9 million, respectively. Contract retentions collectible beyond one year are included in other assets in the Condensed Consolidated Balance Sheet and totaled $10.4 million as of September 30, 2019 and $17.7 million as of June 30, 2019.

Disaggregated Revenue

Revenue disaggregated by reportable segment is presented in Note 9 - Segment Information. The following series of tables presents revenue disaggregated by geographic area where the work was performed and by contract type:

Geographic Disaggregation:



	Three Months Ended
	September 30, 2019		September 30, 2018
	(In thousands)
United States	$	314,416	$	310,137
Canada	21,170		7,081
Other international	2,511		1,293
Total Revenue	$	338,097	$	318,511

Contract Type Disaggregation:



	Three Months Ended
	September 30, 2019		September 30, 2018
	(In thousands)
Fixed-price contracts	$	176,320	$	179,122
Time and materials and other cost reimbursable contracts	161,777		139,389
Total Revenue	$	338,097	$	318,511

Typically, the Company assumes more risk with fixed-price contracts since increases in cost to perform the work may not be recoverable. However, these types of contracts typically offer higher profits than time and materials and other cost reimbursable contracts when completed at or below the costs originally estimated. The profitability of time and materials and other cost reimbursable contracts is typically lower than fixed-price contracts and is usually less volatile than fixed-price contracts since the profit component is factored into the rates charged for labor, equipment and materials, or is expressed in the contract as a percentage of the reimbursable costs incurred.

Leases Leases (Notes)

3 Months Ended

Sep. 30, 2019

Leases [Abstract]

Lessee, Operating Leases [Text Block]

Leases

The Company enters into lease arrangements for real estate, construction equipment and information technology equipment in the normal course of business. Real estate leases accounted for approximately 83% of all right-of-use assets as of September 30, 2019. Most real estate and information technology equipment leases generally have fixed payments that follow an agreed upon payment schedule and have remaining lease terms ranging from less than a year to 16 years. Construction equipment leases generally have "month-to-month" lease terms that automatically renew as long as the equipment remains in use.

The components of lease expense in the Condensed Consolidated Statements of Income are as follows:



		Three Months Ended
		September 30, 2019
Lease expense	Location of Expense in Statements of Income	(in thousands)
Operating lease expense	Cost of revenues and selling, general and administrative expenses	$	3,117
Short-term lease expense⁽¹⁾	Cost of revenues	9,608
Total lease expense		$	12,725


(1)	Represents the lease expense of equipment that is subject to month-to-month rental agreements with expected rental durations of less than one year.

The future undiscounted lease payments, as reconciled to the discounted operating lease liabilities indicated on the Company's Condensed Consolidated Balance Sheets, were as follows:



	September 30, 2019
Maturity Analysis⁽¹⁾:	(in thousands)
Remainder of Fiscal 2020	$	7,446
Fiscal 2021	6,483
Fiscal 2022	4,828
Fiscal 2023	3,141
Fiscal 2024	1,519
Thereafter	5,024
Total future operating lease payments	28,441
Less: imputed interest	(3,783		)
Net present value of future lease payments	24,658
Less: current portion of operating lease liabilities	8,660
Non-current operating lease liabilities	$	15,998


(1)	This analysis does not include a lease that has been executed, but is not expected to commence until December 2019. This lease has a 10 year term and future minimum lease payments of $11.9 million.

The following is a summary of the weighted average remaining operating lease term and weighted average discount rate as of September 30, 2019:



Weighted-average remaining lease term (in years)	5.1
Weighted-average discount rate	5.6	%

Supplemental cash flow information related to leases is as follows:



	Three Months Ended
	September 30, 2019
	(in thousands)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	3,134
Right-of-use assets obtained in exchange for lease liabilities:
Operating leases	$	26,399

Intangible Assets Including Goodwill (Notes)

3 Months Ended

Sep. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets Including Goodwill

Goodwill

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



	Electrical Infrastructure			Oil Gas & Chemical		Storage Solutions			Industrial			Total
	(In thousands)
Net balance at June 30, 2019	$	24,830		$	30,829	$	16,736		$	20,973		$	93,368
Translation adjustment⁽¹⁾	(13		)	—		(53		)	(2		)	(68		)
Net balance at September 30, 2019	$	24,817		$	30,829	$	16,683		$	20,971		$	93,300


(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.

The Company tests its goodwill for impairment annually in May. The Company did not note any impairment indicators as of September 30, 2019. However, if our market view of project opportunities or gross margins deteriorates, then an interim goodwill impairment test will be performed, which could result in the recognition of an impairment to goodwill.

Other Intangible Assets

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



		At September 30, 2019
	Useful Life	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
	(Years)	(In thousands)
Intellectual property	10 to 15	$	2,579	$	(1,823	)	$	756
Customer-based	6 to 15	38,525		(20,773		)	17,752
Non-compete agreements	4	1,453		(1,445		)	8
Total amortizing intangible assets		$	42,557	$	(24,041	)	$	18,516



		At June 30, 2019
	Useful Life	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
	(Years)	(In thousands)
Intellectual property	10 to 15	$	2,579	$	(1,779	)	$	800
Customer-based	6 to 15	38,572		(19,915		)	18,657
Non-compete agreements	4	1,453		(1,438		)	15
Total amortizing intangible assets		$	42,604	$	(23,132	)	$	19,472

Amortization expense totaled $0.9 million and $0.8 million during the three months ended September 30, 2019 and September 30, 2018, respectively.

We estimate that the remaining amortization expense related to September 30, 2019 amortizing intangible assets will be as follows (in thousands):



Period ending:
Remainder of Fiscal 2020	$	2,819
Fiscal 2021	3,743
Fiscal 2022	2,899
Fiscal 2023	2,447
Fiscal 2024	2,134
Fiscal 2025	1,739
Thereafter	2,735
Total estimated remaining amortization expense at September 30, 2019	$	18,516

Debt (Notes)

3 Months Ended

Sep. 30, 2019

Debt Disclosure [Abstract]

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.

The Credit Agreement provides for a five-year senior secured revolving credit facility of $300.0 million that expires February 8, 2022. The credit facility may be used for working capital, acquisitions, capital expenditures, issuances of letters of credit and other lawful purposes.

The Credit Agreement includes the following covenants and borrowing limitations:


•	Our Leverage Ratio, determined as of the end of each fiscal quarter, may not exceed 3.00 to 1.00.


•	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 credit facility includes a sublimit for revolving loans and letters of credit 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 total 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 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, or "Covenant EBITDA," over the previous four quarters. For the four quarters ended September 30, 2019, Covenant EBITDA was $75.9 million. Consolidated Funded Indebtedness at September 30, 2019 was $59.4 million.

Availability under the senior secured revolving credit facility at September 30, 2019 was as follows:



	September 30, 2019		June 30, 2019
	(In thousands)
Senior secured revolving credit facility	$	300,000	$	300,000
Capacity constraint due to the Leverage Ratio	72,174		94,323
Capacity under the credit facility	227,826		205,677
Letters of credit	48,040		48,147
Borrowings outstanding	11,366		5,347
Availability under the senior secured revolving credit facility	$	168,420	$	152,183

At September 30, 2019, the Company was in compliance with all affirmative, negative, and financial covenants under the Credit Agreement.

Income Taxes (Notes)	3 Months Ended
Income Taxes (Notes)	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Effective Tax Rate Our effective tax rate for the three months ended September 30, 2019 was 30.6%, compared to 16.4% for the same period a year ago. We expected our fiscal 2020 effective tax rate to be approximately 27.0%. The effective tax rate in fiscal 2020 was negatively impacted by $0.3 million of excess tax expense related to the vesting of stock-based compensation. The effective tax rate for the three months ended September 30, 2018 was positively impacted by $0.3 million of excess tax benefits related to the vesting of stock-based compensation.

Commitments and Contingencies (Notes)	3 Months Ended
Commitments and Contingencies (Notes)	Sep. 30, 2019
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. Unpriced Change Orders and Claims Costs and estimated earnings in excess of billings on uncompleted contracts included revenues for unpriced change orders and claims of $8.5 million at September 30, 2019 and $10.1 million at June 30, 2019. Generally, collection of amounts related to unpriced change orders and claims is expected within twelve months. However, since customers may not pay these amounts until final resolution of related claims, collection of these amounts may extend beyond one year. Other The Company and its subsidiaries are participants in various legal actions. It is the opinion of management that none of the known legal actions will have a material impact on the Company’s financial position, results of operations or liquidity.

Earnings per Common Share (Notes)

3 Months Ended

Sep. 30, 2019

Earnings Per Share [Abstract]

Earnings per Common Share

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

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



	Three Months Ended
	September 30, 2019		September 30, 2018
	(In thousands, except per share data)
Basic EPS:
Net income	$	6,151	$	2,305
Weighted average shares outstanding	26,935		26,921
Basic earnings per share	$	0.23	$	0.09
Diluted EPS:
Weighted average shares outstanding – basic	26,935		26,921
Dilutive stock options	25		31
Dilutive nonvested deferred shares	615		637
Diluted weighted average shares	27,575		27,589
Diluted earnings per share	$	0.22	$	0.08

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



	Three Months Ended
	September 30, 2019	September 30, 2018
	(In thousands)
Nonvested deferred shares	269	167
Total antidilutive securities	269	167

Segment Information (Notes)

3 Months Ended

Sep. 30, 2019

Segment Reporting [Abstract]

Segment Information

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

The Electrical Infrastructure segment consists of power delivery services provided to investor owned utilities, including construction of new substations, upgrades of existing substations, short-run transmission line installations, distribution upgrades and maintenance, as well as emergency and storm restoration services. We also provide construction and maintenance services to a variety of power generation facilities, such as combined cycle plants and other natural gas fired power stations.

The Oil Gas & Chemical segment serves customers primarily in the downstream and midstream petroleum industries who are engaged in refining crude oil and processing, fractionating, and marketing of natural gas and natural gas liquids. We also perform work in the petrochemical, upstream petroleum, and sulfur extraction, recovery and processing markets. Our services include plant maintenance, turnarounds, engineering and capital construction. We also offer industrial cleaning services, including hydro-blasting, hydro-excavating, advanced chemical cleaning and vacuum services.

The Storage Solutions segment consists of work related to aboveground storage tanks ("AST") and terminals. Also included in this segment are cryogenic and other specialty storage tanks and terminals including liquefied natural gas, liquid nitrogen/liquid oxygen, liquid petroleum and other specialty vessels such as spheres as well as marine structures and truck and rail loading/offloading facilities. Our services include engineering, fabrication and construction, and maintenance and repair, which includes planned and emergency services for both tanks and full terminals. 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 consists of work for integrated iron and steel companies, major mining and minerals companies engaged primarily in the extraction of copper, as well as companies in other industries, including aerospace and defense, cement, and agriculture and grain. Our services include engineering, fabrication and construction, and maintenance and repair, which includes planned and emergency services. We also design instrumentation and control systems and offer specialized expertise in the design and construction of bulk material handling systems.

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, 2019 and in Note 1 of this Quarterly Report on Form 10-Q. Intersegment sales and transfers are recorded at cost; therefore, no intersegment profit or loss is recognized.

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

Results of Operations

(In thousands)



	Three Months Ended
	September 30, 2019			September 30, 2018
Gross revenues
Electrical Infrastructure	$	31,532		$	44,701
Oil Gas & Chemical	57,786			75,562
Storage Solutions	150,752			113,767
Industrial	99,287			85,557
Total gross revenues	$	339,357		$	319,587
Less: Inter-segment revenues
Oil Gas & Chemical	$	256		$	71
Storage Solutions	685			1,005
Industrial	319			—
Total inter-segment revenues	$	1,260		$	1,076
Consolidated revenues
Electrical Infrastructure	$	31,532		$	44,701
Oil Gas & Chemical	57,530			75,491
Storage Solutions	150,067			112,762
Industrial	98,968			85,557
Total consolidated revenues	$	338,097		$	318,511
Gross profit
Electrical Infrastructure	$	104		$	3,383
Oil Gas & Chemical	3,635			5,625
Storage Solutions	21,055			9,553
Industrial	7,671			4,860
Total gross profit	$	32,465		$	23,421
Operating income (loss)
Electrical Infrastructure	$	(1,844	)	$	657
Oil Gas & Chemical	(1,773		)	514
Storage Solutions	9,452			285
Industrial	2,939			764
Total operating income	$	8,774		$	2,220

Total assets by segment were as follows:



	September 30, 2019		June 30, 2019
Electrical Infrastructure	$	137,643	$	155,880
Oil Gas & Chemical	93,866		91,959
Storage Solutions	206,144		188,912
Industrial	68,091		90,336
Unallocated assets	167,010		106,307
Total segment assets	$	672,754	$	633,394

Basis of Presentation Basis of Presentation - Lease Accounting Policy (Policies)	3 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Leases	Lease Accounting Policy The Company enters into lease arrangements for real estate, construction equipment and information technology equipment in the normal course of business. The Company determines if an arrangement is or contains a lease at inception of the arrangement. An arrangement is determined to be a lease if it conveys the right to control the use of identified property or equipment for a period of time in exchange for consideration. If certain criteria are satisfied, the lease is classified as a financing lease. If none of these criteria are satisfied, the lease is considered an operating lease. All of the Company's leases are classified as operating leases. Operating lease right-of-use assets are recognized as the present value of future lease payments over the lease term as of the commencement date, plus any lease payments made prior to commencement, and less any lease incentives received. Operating right-of-use assets are presented as noncurrent in the Condensed Consolidated Balance Sheets. Operating lease liabilities are recognized as the present value of the future lease payments over the lease term as of the commencement date and are presented as current and noncurrent in the Condensed Consolidated Balance Sheets. The Company has elected not to recognize right-of-use assets and lease liabilities for short-term leases with an initial term of 12 months or less. The lease term used to measure the right-of-use assets and lease liabilities is generally the non-cancelable lease term for real estate leases and information technology equipment. Construction equipment is typically rented on a "month-to-month" basis and the lease term is estimated based on the expected duration of the rental. An option to renew or terminate a lease is included in the lease term when it is reasonably certain that the Company will exercise the option. Renewal options for real estate leases are typically for five years or less. Future lease payments are discounted based on the Company's estimate of its incremental borrowing rate at lease commencement. The incremental borrowing rate is the rate of interest that the Company would have to pay to borrow on a collateralized basis over a similar term an amount equal to the lease payments. Determinations with respect to lease term, including any renewals, incremental borrowing rate, and future lease payments require the use of judgment based on the facts and circumstances related to each lease. The Company considers various factors, including economic incentives, intent, past history and business need, to determine the likelihood that a renewal option will be exercised. After the commencement date, operating lease expense is recognized based on the undiscounted future lease payments over the remaining lease term on a straight-line basis. Lease expense related to short-term leases is recognized on a straight-line basis over the lease term. Lease expense is included in cost of revenue and in selling, general and administrative expenses in the Condensed Consolidated Statements of Income.

Revenue Revenue (Tables)

3 Months Ended

Sep. 30, 2019

Contract with Customer, Asset and Liability [Abstract]

Contract with Customer, Asset and Liability [Table Text Block]

The following table provides information about CIE and BIE:



	September 30, 2019			June 30, 2019			Change
	(in thousands)
Costs and estimated earnings in excess of billings on uncompleted contracts	$	65,996		$	96,083		$	(30,087	)
Billings on uncompleted contracts in excess of costs and estimated earnings	(130,191		)	(105,626		)	(24,565		)
Net contract liabilities	$	(64,195	)	$	(9,543	)	$	(54,652	)

Disaggregation of Revenue [Line Items]

Disaggregation of Revenue [Table Text Block]

The following series of tables presents revenue disaggregated by geographic area where the work was performed and by contract type:

Geographic Disaggregation:



	Three Months Ended
	September 30, 2019		September 30, 2018
	(In thousands)
United States	$	314,416	$	310,137
Canada	21,170		7,081
Other international	2,511		1,293
Total Revenue	$	338,097	$	318,511

Contract Type Disaggregation:



	Three Months Ended
	September 30, 2019		September 30, 2018
	(In thousands)
Fixed-price contracts	$	176,320	$	179,122
Time and materials and other cost reimbursable contracts	161,777		139,389
Total Revenue	$	338,097	$	318,511

Leases Leases (Tables)

3 Months Ended

Sep. 30, 2019

Leases [Abstract]

Lease, Cost [Table Text Block]

The components of lease expense in the Condensed Consolidated Statements of Income are as follows:



		Three Months Ended
		September 30, 2019
Lease expense	Location of Expense in Statements of Income	(in thousands)
Operating lease expense	Cost of revenues and selling, general and administrative expenses	$	3,117
Short-term lease expense⁽¹⁾	Cost of revenues	9,608
Total lease expense		$	12,725

(1)

Represents the lease expense of equipment that is subject to month-to-month rental agreements with expected rental durations of less than one year.

Lessee, Operating Lease, Liability, Maturity [Table Text Block]

The future undiscounted lease payments, as reconciled to the discounted operating lease liabilities indicated on the Company's Condensed Consolidated Balance Sheets, were as follows:



	September 30, 2019
Maturity Analysis⁽¹⁾:	(in thousands)
Remainder of Fiscal 2020	$	7,446
Fiscal 2021	6,483
Fiscal 2022	4,828
Fiscal 2023	3,141
Fiscal 2024	1,519
Thereafter	5,024
Total future operating lease payments	28,441
Less: imputed interest	(3,783		)
Net present value of future lease payments	24,658
Less: current portion of operating lease liabilities	8,660
Non-current operating lease liabilities	$	15,998

(1)

This analysis does not include a lease that has been executed, but is not expected to commence until December 2019. This lease has a 10 year term and future minimum lease payments of $11.9 million.

Other Information Related to Leases [Table Text Block]

The following is a summary of the weighted average remaining operating lease term and weighted average discount rate as of September 30, 2019:



Weighted-average remaining lease term (in years)	5.1
Weighted-average discount rate	5.6	%

Supplemental cash flow information related to leases is as follows:



	Three Months Ended
	September 30, 2019
	(in thousands)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	3,134
Right-of-use assets obtained in exchange for lease liabilities:
Operating leases	$	26,399

Intangible Assets Including Goodwill (Tables)

3 Months Ended

Sep. 30, 2019

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, 2019	$	24,830		$	30,829	$	16,736		$	20,973		$	93,368
Translation adjustment⁽¹⁾	(13		)	—		(53		)	(2		)	(68		)
Net balance at September 30, 2019	$	24,817		$	30,829	$	16,683		$	20,971		$	93,300


(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, 2019
	Useful Life	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
	(Years)	(In thousands)
Intellectual property	10 to 15	$	2,579	$	(1,823	)	$	756
Customer-based	6 to 15	38,525		(20,773		)	17,752
Non-compete agreements	4	1,453		(1,445		)	8
Total amortizing intangible assets		$	42,557	$	(24,041	)	$	18,516



		At June 30, 2019
	Useful Life	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
	(Years)	(In thousands)
Intellectual property	10 to 15	$	2,579	$	(1,779	)	$	800
Customer-based	6 to 15	38,572		(19,915		)	18,657
Non-compete agreements	4	1,453		(1,438		)	15
Total amortizing intangible assets		$	42,604	$	(23,132	)	$	19,472

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



Period ending:
Remainder of Fiscal 2020	$	2,819
Fiscal 2021	3,743
Fiscal 2022	2,899
Fiscal 2023	2,447
Fiscal 2024	2,134
Fiscal 2025	1,739
Thereafter	2,735
Total estimated remaining amortization expense at September 30, 2019	$	18,516

Debt (Tables)

3 Months Ended

Sep. 30, 2019

Debt Disclosure [Abstract]

Availability Under the Senior Credit Facility

Availability under the senior secured revolving credit facility at September 30, 2019 was as follows:



	September 30, 2019		June 30, 2019
	(In thousands)
Senior secured revolving credit facility	$	300,000	$	300,000
Capacity constraint due to the Leverage Ratio	72,174		94,323
Capacity under the credit facility	227,826		205,677
Letters of credit	48,040		48,147
Borrowings outstanding	11,366		5,347
Availability under the senior secured revolving credit facility	$	168,420	$	152,183

Earnings per Common Share (Tables)

3 Months Ended

Sep. 30, 2019

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, 2019		September 30, 2018
	(In thousands, except per share data)
Basic EPS:
Net income	$	6,151	$	2,305
Weighted average shares outstanding	26,935		26,921
Basic earnings per share	$	0.23	$	0.09
Diluted EPS:
Weighted average shares outstanding – basic	26,935		26,921
Dilutive stock options	25		31
Dilutive nonvested deferred shares	615		637
Diluted weighted average shares	27,575		27,589
Diluted earnings per share	$	0.22	$	0.08

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, 2019	September 30, 2018
	(In thousands)
Nonvested deferred shares	269	167
Total antidilutive securities	269	167

Segment Information (Tables)

3 Months Ended

Sep. 30, 2019

Segment Reporting [Abstract]

Results of Operations

(In thousands)



	Three Months Ended
	September 30, 2019			September 30, 2018
Gross revenues
Electrical Infrastructure	$	31,532		$	44,701
Oil Gas & Chemical	57,786			75,562
Storage Solutions	150,752			113,767
Industrial	99,287			85,557
Total gross revenues	$	339,357		$	319,587
Less: Inter-segment revenues
Oil Gas & Chemical	$	256		$	71
Storage Solutions	685			1,005
Industrial	319			—
Total inter-segment revenues	$	1,260		$	1,076
Consolidated revenues
Electrical Infrastructure	$	31,532		$	44,701
Oil Gas & Chemical	57,530			75,491
Storage Solutions	150,067			112,762
Industrial	98,968			85,557
Total consolidated revenues	$	338,097		$	318,511
Gross profit
Electrical Infrastructure	$	104		$	3,383
Oil Gas & Chemical	3,635			5,625
Storage Solutions	21,055			9,553
Industrial	7,671			4,860
Total gross profit	$	32,465		$	23,421
Operating income (loss)
Electrical Infrastructure	$	(1,844	)	$	657
Oil Gas & Chemical	(1,773		)	514
Storage Solutions	9,452			285
Industrial	2,939			764
Total operating income	$	8,774		$	2,220

Total assets by segment were as follows:



	September 30, 2019		June 30, 2019
Electrical Infrastructure	$	137,643	$	155,880
Oil Gas & Chemical	93,866		91,959
Storage Solutions	206,144		188,912
Industrial	68,091		90,336
Unallocated assets	167,010		106,307
Total segment assets	$	672,754	$	633,394

Basis of Presentation Basis of Presentation - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jul. 01, 2019	Jun. 30, 2019
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Operating lease right-of-use assets	$ 23,595	$ 24,600	$ 0
Operating Lease, Liability	$ 24,658	$ 25,800

Revenue Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
Revenue Revenue (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2019
Revenue, Performance Obligation [Abstract]
Revenue, Remaining Performance Obligation, Amount	$ 756,700
Performance obligations to be recognized as revenue within next twelve months	637,600
Contract with Customer, Asset and Liability [Abstract]
Costs and estimated earnings in excess of billings on uncompleted contracts	65,996		$ 96,083
Change in CIE	(30,087)
Billings on uncompleted contracts in excess of costs and estimated earnings	(130,191)		(105,626)
Change in BIE	(24,565)
Change in net contract balances	(54,652)
Contract with Customer, Liability, Revenue Recognized	72,000
Disclosure Customer Contracts Additional Information [Abstract]
Contract Receivable Retainage, Due in Next Twelve Months	31,300		21,900
Contract Receivable Retainage, Due after Next Twelve Months	10,400		$ 17,700
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	338,097	$ 318,511
Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	176,320	179,122
Time-and-materials Contract [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	161,777	139,389
United States
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	314,416	310,137
Canada
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	21,170	7,081
Other international [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	$ 2,511	$ 1,293

Leases Leases - Narrative (Details)	Sep. 30, 2019 Rate
Leases [Abstract]
Operating lease term (up to)	16 years
Percentage of real estate leases	83.00%

Leases Leases - Components of Lease Costs (Details) $ in Thousands	3 Months Ended
	Sep. 30, 2019 USD ($)
Lease, Cost [Abstract]
Operating lease expense	$ 3,117
Short-term lease expense	9,608
Total lease expense	$ 12,725

Leases Leases - Maturity Analysis (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jul. 01, 2019	Jun. 30, 2019
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Remainder of Fiscal 2020	$ 7,446
Fiscal 2021	6,483
Fiscal 2022	4,828
Fiscal 2023	3,141
Fiscal 2024	1,519
Thereafter	5,024
Total future operating lease payments	28,441
Less: imputed interest	(3,783)
Net present value of future lease payments	24,658	$ 25,800
Less: current portion of operating lease liabilities	8,660		$ 0
Non-current operating lease liabilities	$ 15,998		$ 0
Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract	10 years
Total future payments for lease not yet commenced	$ 11,900

Leases Leases - Other Lease Information (Details)	Sep. 30, 2019 Rate
Other Lease Information [Abstract]
Operating Lease, Weighted Average Remaining Lease Term	5 years 1 month 6 days
Operating Lease, Weighted Average Discount Rate, Percent	5.60%

Leases Leases - Supplemental Cash Flow Disclosures (Details) $ in Thousands	3 Months Ended
	Sep. 30, 2019 USD ($)
Supplemental Cash Flow Information [Abstract]
Cash paid for operating leases	$ 3,134
Right-of-use asset obtained in exchange for operating lease liability	$ 26,399

Intangible Assets Including Goodwill - Carrying Value of Goodwill By Segment (Details) $ in Thousands	3 Months Ended
	Sep. 30, 2019 USD ($)
Goodwill [Line Items]
Goodwill	$ 93,300
Goodwill [Roll Forward]
Net balance at June 30, 2019	93,368
Translation adjustment	(68)
Net balance at September 30, 2019	93,300
Electrical Infrastructure [Member]
Goodwill [Line Items]
Goodwill	24,830
Goodwill [Roll Forward]
Net balance at June 30, 2019	24,830
Translation adjustment	(13)
Net balance at September 30, 2019	24,817
Oil Gas & Chemical [Member]
Goodwill [Line Items]
Goodwill	30,829
Goodwill [Roll Forward]
Net balance at June 30, 2019	30,829
Translation adjustment	0
Net balance at September 30, 2019	30,829
Storage Solutions [Member]
Goodwill [Line Items]
Goodwill	16,736
Goodwill [Roll Forward]
Net balance at June 30, 2019	16,736
Translation adjustment	(53)
Net balance at September 30, 2019	16,683
Industrial [Member]
Goodwill [Line Items]
Goodwill	20,973
Goodwill [Roll Forward]
Net balance at June 30, 2019	20,973
Translation adjustment	(2)
Net balance at September 30, 2019	$ 20,971

Intangible Assets Including Goodwill - Carrying Value of Other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2019
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 42,557		$ 42,604
Accumulated Amortization	(24,041)		(23,132)
Net Carrying Amount	18,516		19,472
Total intangible assets, net carrying amount	18,516		19,472
Amortization expense	900	$ 800
Intellectual Property [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	2,579		2,579
Accumulated Amortization	(1,823)		(1,779)
Net Carrying Amount	$ 756		800
Intellectual Property [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	10 years	10 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	$ 38,525		38,572
Accumulated Amortization	(20,773)		(19,915)
Net Carrying Amount	$ 17,752		18,657
Customer Relationships [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	6 years	6 years
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
Finite-Lived Intangible Asset, Useful Life	4 years	4 years
Accumulated Amortization	$ (1,445)		(1,438)
Net Carrying Amount	$ 8		$ 15

Intangible Assets Including Goodwill - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense	$ 900	$ 800
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	42,557		$ 42,604
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	38,525		38,572
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 1,453		$ 1,453
Finite-Lived Intangible Asset, Useful Life	4 years	4 years
Minimum [Member] \| Intellectual Property [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	10 years	10 years
Minimum [Member] \| Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	6 years	6 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

Intangible Assets Including Goodwill Future Expected Amortization Expense (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jun. 30, 2019
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	$ 2,819
Finite-Lived Intangible Assets, Amortization Expense, Next Year	3,743
Finite-Lived Intangible Assets, Amortization Expense, Year Two	2,899
Finite-Lived Intangible Assets, Amortization Expense, Year Three	2,447
Finite-Lived Intangible Assets, Amortization Expense, Year Four	2,134
Finite-Lived Intangible Assets, Amortization Expense, Year Five	1,739
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	2,735
Finite-Lived Intangible Assets, Net	$ 18,516	$ 19,472

Debt - Additional Information (Detail) $ in Thousands	3 Months Ended
Debt - Additional Information (Detail) $ in Thousands	Sep. 30, 2019 USD ($) Rate	Jun. 30, 2019 USD ($)
Credit Agreement Terms
Senior secured revolving credit facility \| $	$ 300,000	$ 300,000
Line Of Credit Facility Expiration Date	Feb. 08, 2022
Senior Leverage Ratio, Maximum	3.00
Senior Leverage Ratio, Minimum	1.00
Fixed Charge Coverage Ratio, Maximum	1.25
Fixed Charge Coverage Ratio, Minimum	1.00
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 \| $	$ 75,900
Consolidated funded indebtedness \| $	$ 59,400
Minimum [Member]
Credit Agreement Terms
Unused Credit Facility Fee	0.25%
Maximum [Member]
Credit Agreement Terms
Unused Credit Facility Fee	0.45%

Debt - Availability Under The Senior Credit Facility (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jun. 30, 2019
Debt Disclosure [Abstract]
Senior credit facility	$ 300,000	$ 300,000
Capacity Constraint Due To Senior Leverage Ratio	72,174	94,323
Line Of Credit Facility Maximum Borrowing Capacity After Consideration Of Capacity Constraint	227,826	205,677
Line of Credit Facility, Amount Outstanding	48,040	48,147
Letters of credit subject to the credit facility	11,366	5,347
Availability under the senior credit facility	$ 168,420	$ 152,183

- Definition

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

+ References + Details

Income Taxes Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
Income Taxes Income Taxes (Details) - USD ($) $ in Millions	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent	30.60%	16.40%
Discrete item impact on effective tax rate	$ 0.3	$ 0.3
Expected effective tax rate	27.00%

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	Sep. 30, 2019	Jun. 30, 2019
Project Unapproved Change Orders and Claims [Line Items]
Unapproved change orders and claims	$ 8.5	$ 10.1

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, 2019	Sep. 30, 2018
Earnings Per Share, Basic [Abstract]
Net income (loss)	$ 6,151	$ 2,305
Weighted average shares outstanding - basic (shares)	26,935	26,921
Basic EPS (US$ per share)	$ 0.23	$ 0.09
Earnings Per Share, Diluted [Abstract]
Dilutive stock options	25	31
Dilutive nonvested deferred shares	615	637
Diluted weighted average shares (shares)	27,575	27,589
Diluted EPS (US$ per share)	$ 0.22	$ 0.08

- Definition

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

+ References

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+ Details

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References

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+ Details

- Definition

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

+ References + Details

Earnings per Common Share - Antidilutive Securities Excluded from the Calculation of Diluted Earnings Per Share (Details) - shares shares in Thousands	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total antidilutive securities	269	167
Nonvested Deferred Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total antidilutive securities	269	167

Segment Information - Results of Operations (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2019
Segment Reporting Information [Line Items]
Gross revenues	$ 339,357	$ 319,587
Revenues	338,097	318,511
Gross profit	32,465	23,421
Operating income	8,774	2,220
Segment assets	672,754		$ 633,394
Electrical Infrastructure [Member]
Segment Reporting Information [Line Items]
Gross revenues	31,532	44,701
Revenues	31,532	44,701
Gross profit	104	3,383
Operating income	(1,844)	657
Segment assets	137,643		155,880
Oil Gas & Chemical [Member]
Segment Reporting Information [Line Items]
Gross revenues	57,786	75,562
Revenues	57,530	75,491
Gross profit	3,635	5,625
Operating income	(1,773)	514
Segment assets	93,866		91,959
Storage Solutions [Member]
Segment Reporting Information [Line Items]
Gross revenues	150,752	113,767
Revenues	150,067	112,762
Gross profit	21,055	9,553
Operating income	9,452	285
Segment assets	206,144		188,912
Industrial [Member]
Segment Reporting Information [Line Items]
Gross revenues	99,287	85,557
Revenues	98,968	85,557
Gross profit	7,671	4,860
Operating income	2,939	764
Segment assets	68,091		90,336
Other Segments [Member]
Segment Reporting Information [Line Items]
Segment assets	167,010		$ 106,307
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Gross revenues	1,260	1,076
Intersegment Eliminations [Member] \| Oil Gas & Chemical [Member]
Segment Reporting Information [Line Items]
Gross revenues	256	71
Intersegment Eliminations [Member] \| Storage Solutions [Member]
Segment Reporting Information [Line Items]
Gross revenues	685	1,005
Intersegment Eliminations [Member] \| Industrial [Member]
Segment Reporting Information [Line Items]
Gross revenues	$ 319	$ 0