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Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Mar. 31, 2019	May 07, 2019
Document Documentand Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
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		26,807,203

Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Revenues	$ 358,887	$ 245,645	$ 1,017,966	$ 798,466
Cost of revenues	321,981	230,754	929,753	727,981
Gross profit	36,906	14,891	88,213	70,485
Selling, general and administrative expenses	24,112	20,753	67,672	63,852
Operating income (loss)	12,794	(5,862)	20,541	6,633
Other income (expense):
Interest expense	(301)	(643)	(954)	(2,080)
Interest income	307	130	863	234
Other	58	370	582	384
Income (loss) before income tax expense	12,858	(6,005)	21,032	5,171
Provision (benefit) for federal, state and foreign income taxes	3,925	(852)	5,862	1,968
Net income (loss)	$ 8,933	$ (5,153)	$ 15,170	$ 3,203
Basic earnings per common share (US$ per share)	$ 0.33	$ (0.19)	$ 0.56	$ 0.12
Diluted earnings per common share (US$ per share)	$ 0.33	$ (0.19)	$ 0.55	$ 0.12
Weighted average common shares outstanding:
Basic (shares)	26,788	26,817	26,918	26,747
Diluted (shares)	27,417	26,817	27,587	27,054

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 8,933	$ (5,153)	$ 15,170	$ 3,203
Other comprehensive income (loss), net of tax:
Foreign currency translation gain (loss) (net of tax expense (benefit) of $97 and $(79) for the three and nine months ended March 31, 2019, respectively, and $(8) and $28 for the three and nine months ended March 31, 2018, respectively)	216	(710)	(452)	826
Comprehensive income (loss)	$ 9,149	$ (5,863)	$ 14,718	$ 4,029

- Definition

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

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+ Details

Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	$ 97	$ (8)	$ (79)	$ 28

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Jun. 30, 2018
Current assets:
Cash and cash equivalents	$ 49,676	$ 64,057
Accounts receivable, less allowances (March 31, 2019— $938 and June 30, 2018—$6,327)	274,904	203,388
Costs and estimated earnings in excess of billings on uncompleted contracts	75,353	76,632
Inventories	8,637	5,152
Income taxes receivable	489	3,359
Other current assets	6,171	4,458
Total current assets	415,230	357,046
Property, plant and equipment at cost:
Land and buildings	41,091	40,424
Construction equipment	90,759	89,036
Transportation equipment	49,719	48,339
Office equipment and software	43,036	41,236
Construction in progress	5,860	1,353
Property, plant and equipment at cost, gross	230,465	220,388
Accumulated depreciation	(154,653)	(147,743)
Property, plant and equipment at cost, net	75,812	72,645
Goodwill	93,316	96,162
Other intangible assets	20,282	22,814
Deferred income taxes	6,169	4,848
Other assets	20,624	4,518
Total assets	631,433	558,033
Current liabilities:
Accounts payable	110,502	79,439
Billings on uncompleted contracts in excess of costs and estimated earnings	122,235	120,740
Accrued wages and benefits	41,823	24,375
Accrued insurance	9,459	9,080
Income taxes payable	907	7
Other accrued expenses	4,618	4,824
Total current liabilities	289,544	238,465
Deferred income taxes	3,391	429
Borrowings under senior secured revolving credit facility	2,172	0
Other liabilities	232	296
Total liabilities	295,339	239,190
Commitments and contingencies
Matrix Service Company stockholders' equity:
Common stock—$.01 par value; 60,000,000 shares authorized; 27,888,217 shares issued as of March 31, 2019 and June 30, 2018; 26,803,422 and 26,853,823 shares outstanding as of March 31, 2019 and June 30, 2018	279	279
Additional paid-in capital	134,836	132,198
Retained earnings	226,664	211,494
Accumulated other comprehensive loss	(7,863)	(7,411)
Matrix Service Company stockholders' equity	353,916	336,560
Less: Treasury stock, at cost — 1,084,795 shares as of March 31, 2019, and 1,034,394 shares as of June 30, 2018	(17,822)	(17,717)
Total stockholders' equity	336,094	318,843
Total liabilities and stockholders’ equity	$ 631,433	$ 558,033

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2019	Jun. 30, 2018
Statement Condensed Consolidated Balance Sheets [Abstract]
Accounts receivable, allowances	$ 938	$ 6,327
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	26,803,422	26,853,823
Treasury stock, shares	1,084,795	1,034,394

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating activities:
Net income (loss)	$ 15,170	$ 3,203
Adjustments to reconcile net income to net cash provided (used) by operating activities, net of effects from acquisitions and disposals:
Depreciation and amortization	13,623	15,546
Stock-based compensation expense	9,045	6,488
Deferred income tax	1,562	2,646
Gain on disposal of business (Note 3)	(427)	0
Gain on sale of property, plant and equipment	(810)	(511)
Provision for uncollectible accounts	(105)	12
Other	308	295
Changes in operating assets and liabilities increasing (decreasing) cash, net of effects from acquisitions and disposals:
Accounts receivable	(71,436)	19,831
Costs and estimated earnings in excess of billings on uncompleted contracts	921	24,195
Inventories	(3,492)	(1,602)
Other assets and liabilities	(14,750)	(1,717)
Accounts payable	30,092	(37,697)
Billings on uncompleted contracts in excess of costs and estimated earnings	1,626	13,499
Accrued expenses	17,557	1,714
Net cash provided (used) by operating activities	(1,116)	45,902
Investing activities:
Acquisition of property, plant and equipment	(13,721)	(6,150)
Acquisition, net of cash acquired	0	(1,687)
Proceeds from disposal of business (Note 3)	3,885
Proceeds from asset sales	1,059	857
Net cash used by investing activities	(8,777)	(6,980)
Financing activities:
Advances under senior revolving credit facility	12,430	85,317
Repayments of advances under senior revolving credit facility	(10,133)	(120,862)
Payments of debt issuance costs	0	(364)
Open market purchase of treasury shares	(5,190)	0
Issuances of common stock	128	0
Proceeds from issuance of common stock under employee stock purchase plan	235	224
Repurchase of common stock for payment of statutory taxes due on equity-based compensation	(1,685)	(627)
Net cash used by financing activities	(4,215)	(36,312)
Effect of exchange rate changes on cash and cash equivalents	(273)	470
Increase (decrease) in cash and cash equivalents	(14,381)	3,080
Cash and cash equivalents, beginning of period	64,057	43,805
Cash and cash equivalents, end of period	49,676	46,885
Supplemental disclosure of cash flow information:
Income taxes	742	1,231
Interest	1,340	2,065
Non-cash investing and financing activities:
Purchases of property, plant and equipment on account	$ 1,100	$ 136

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, 2017	$ 321,809	$ 279	$ 128,419	$ 222,974	$ (22,539)	$ (7,324)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	3,203	0	0	3,203	0	0
Other comprehensive income (loss)	826	0	0	0	0	826
Treasury shares sold to Employee Stock Purchase Plan	(224)	0	110	0	(334)	0
Issuance of deferred shares	0	0	(4,467)	0	4,467	0
Other Treasury Share Purchases	(627)	0	0	0	(627)	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Mar. 31, 2018	331,923	279	130,330	226,177	(18,365)	(6,498)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	6,488	0	6,488	0	0	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Dec. 31, 2017	335,586	279	128,235	231,330	(18,470)	(5,788)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(5,153)	0	0	(5,153)	0	0
Other comprehensive income (loss)	(710)	0	0	0	0	(710)
Treasury shares sold to Employee Stock Purchase Plan	82	0	1	0	81	0
Issuance of deferred shares	0	0	(39)	0	39	0
Other Treasury Share Purchases	(15)	0	0	0	(15)	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Mar. 31, 2018	331,923	279	130,330	226,177	(18,365)	(6,498)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	2,133	0	2,133	0	0	0
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 (loss)	15,170	0		15,170
Other comprehensive income (loss)	(452)	0	0	0	0	(452)
Open market purchases of treasury shares	5,190	0	0	0	5,190	0
Treasury shares sold to Employee Stock Purchase Plan	235	0	25	0	210	0
Exercise of stock options	128	0	(126)	0	254	0
Issuance of deferred shares	0	0	(6,306)	0	6,306	0
Other Treasury Share Purchases	(1,685)	0	0	0	(1,685)	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Mar. 31, 2019	336,094	279	134,836	226,664	(17,822)	(7,863)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	9,045	0	9,045	0	0	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Dec. 31, 2018	323,590	279	131,889	217,731	(18,230)	(8,079)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	8,933	0	0	8,933	0	0
Other comprehensive income (loss)	216	0	0	0	0	216
Treasury shares sold to Employee Stock Purchase Plan	82	0	6	0	76	0
Issuance of deferred shares	0	0	(366)	0	366	0
Other Treasury Share Purchases	(34)	0	0	0	(34)	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Mar. 31, 2019	336,094	279	134,836	226,664	(17,822)	(7,863)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	$ 3,307	$ 0	$ 3,307	$ 0	$ 0	$ 0

Condensed Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - shares	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Treasury Stock, Shares, Acquired	0	0	310,532	0
Employee Stock Purchase Plan, shares	4,584	4,560	12,031	16,843
Exercise of stock options, shares	0	0	12,500	0
Issuance of deferred shares, shares	22,133	2,250	314,711	253,124
Other treasury shares purchases, shares	1,693	868	79,111	52,911

Basis of Presentation (Notes)	9 Months Ended
Basis of Presentation (Notes)	Mar. 31, 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, 2018, included in the Company’s Annual Report on Form 10-K for the year then ended. The results of operations for the nine-month period ended March 31, 2019 may not necessarily be indicative of the results of operations for the full year ending June 30, 2019. Significant Accounting Policies We have updated our revenue recognition accounting policy as a result of adopting the Financial Accounting Standards Board ("FASB") Accounting Standards Update ("ASU") 2014-09, Revenue from Contracts with Customers (Topic 606) on July 1, 2018. Our 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, 2018. Revenue Recognition Adoption of New Revenue Recognition Standard The Company adopted ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) on July 1, 2018. The standard outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most previous revenue recognition guidance, including industry-specific guidance, and is applicable to all of the Company's contracts with customers. 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 Company used the modified retrospective method of application. Under the modified retrospective method, revenue recognized on completed contracts is not restated, however contracts in progress are accounted for as if they were under this new standard at inception. Any difference between historical revenue and revenue under the new standard is recorded as a cumulative effect adjustment to retained earnings as of the date of adoption. The cumulative impact of adopting Topic 606 was immaterial and did not require an adjustment to retained earnings. See Note 2 – Revenue for new disclosures required as a result of adopting Topic 606. General Information about our Contracts with Customers Our revenues come from contracts to provide engineering, procurement, fabrication and construction, repair and maintenance and other services. Our engineering, procurement and fabrication and construction services are usually provided in association with capital projects, which commonly are fixed price contracts and are billed based on project milestones. Our repair and maintenance services typically are cost reimbursable or time and material based contracts and are billed monthly or, for projects of short duration, at the conclusion of the project. The elapsed time from award to completion of performance may be in excess of one year for capital projects. Step 1: Contract Identification We do not recognize revenue unless we have identified a contract with a customer. A contract with a customer exists when it has approval and commitment from both parties, the rights and obligations of the parties are identified, payment terms are identified, the contract has commercial substance, and collectibility is probable. We also evaluate whether a contract should be combined with other contracts and accounted for as one single contract. This evaluation requires judgment and could change the timing of the amount of revenue and profit recorded for a given period. Step 2: Identify Performance Obligations Next, we identify each performance obligation in the contract. A performance obligation is a promise to provide a distinct good or service or a series of distinct goods or services to the customer. Revenue is recognized separately for each performance obligation in the contract. Many of our contracts have one clearly identifiable performance obligation. However, many of our contracts provide the customer an integrated service that includes two or more of the following services: engineering, procurement, fabrication, construction, repair and maintenance services. For these contracts, we do not consider the integrated services to be distinct within the context of the contract when the separate scopes of work combine into a single commercial objective or capability for the customer. Accordingly, we generally identify one performance obligation in our contracts. The determination of the number of performance obligations in a contract requires significant judgment and could change the timing of the amount of revenue recorded for a given period. Step 3: Determine Contract Price After determining the performance obligations in the contract, we determine the contract price. The contract price is the amount of consideration we expect to receive from the customer for completing the performance obligation(s). In a fixed price contract, the contract price is a single lump-sum amount. In reimbursable and time and materials based contracts, the contract price is determined by the agreed upon rates or reimbursements for time and materials expended in completing the performance obligation(s) in the contract. A number of our contracts contain various cost and performance incentives and penalties that can either increase or decrease the contract price. These variable consideration amounts are generally earned or incurred based on certain performance metrics, most commonly related to project schedule or cost targets. We estimate variable consideration at the most likely amount of additional consideration to be received (or paid in the case of penalties), provided that meeting the variable condition is probable. We include estimated amounts of variable consideration in the contract price to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is resolved. Our estimates of variable consideration and determination of whether to include estimated amounts in the contract price are based largely on an assessment of our anticipated performance and all information (historical, current and forecasted) that is reasonably available to us. We reassess the amount of variable consideration each accounting period until the uncertainty associated with the variable consideration is resolved. Changes in the assessed amount of variable consideration are accounted for prospectively as a cumulative adjustment to revenue recognized in the current period. Step 4: Assign Contract Price to Performance Obligations After determining the contract price, we assign such price to the performance obligation(s) in the contract. If a contract has multiple performance obligations, we assign the contract price to each performance obligation based on the stand-alone selling prices of the distinct services that comprise each performance obligation. Step 5: Recognize Revenue as Performance Obligations are Satisfied We record revenue for contracts with our customers as we satisfy the contracts' performance obligations. We recognize revenue on performance obligations associated with fixed price contracts for engineering, procurement and construction services over time since these services create or enhance assets the customer controls as they are being created or enhanced. We measure progress of satisfying these performance obligations by using the percentage-of-completion method, which is based on costs incurred to date compared to the total estimated costs at completion, since it best depicts the transfer of control of assets being created or enhanced to the customer. We recognize revenue over time for reimbursable and time and material based repair and maintenance contracts since the customer simultaneously receives and consumes the benefit of those services as we perform work under the contract. As a practical expedient allowed under ASC 606, we record revenue for these contracts in the amount to which we have a right to invoice for the services performed provided that we have a right to consideration from the customer in an amount that corresponds directly with the value of the performance completed to date. Costs incurred may include direct labor, direct materials, subcontractor costs and indirect costs, such as salaries and benefits, supplies and tools, equipment costs and insurance costs. Indirect costs are charged to projects based upon direct costs and overhead allocation rates per dollar of direct costs incurred or direct labor hours worked. Typically, customer contracts will include standard warranties that provide assurance that products and services will function as expected. The Company does not sell separate warranties. We have numerous contracts that are in various stages of completion which require estimates to determine the forecasted costs at completion. Due to the nature of the work left to be performed on many of our contracts, the estimation of total cost at completion for fixed price contracts is complex, subject to many variables and requires significant judgment. Estimates of total cost at completion are made each period and changes in these estimates are accounted for prospectively as cumulative adjustments to revenue recognized in the current period. If estimates of costs to complete fixed price contracts indicate a loss, a provision is made through a contract write-down for the total loss anticipated. Change Orders Contracts are often modified through change orders, which are changes to the agreed upon scope of work. Most of our change orders, which may be priced or unpriced, are for goods or services that are not distinct from the existing contract due to the significant integration of services provided in the context of the contract and are accounted for as if they were part of that existing contract. The effect of a change order on the contract price and our measure of progress for the performance obligation to which it relates, is recognized as an adjustment to revenue on a cumulative catch-up basis. For unpriced change orders, we estimate the increase or decrease to the contract price using the variable consideration method described in the Step 3: Determine Contract Price paragraph above. Unpriced change orders are more fully discussed in Note 7 - Commitments and Contingencies. Claims Sometimes we seek claims for amounts in excess of the contract price for delays, errors in specifications and designs, contract terminations, change orders in dispute or other causes of additional costs incurred by us. Recognition of amounts as additional contract price related to claims is appropriate only if there is a legal basis for the claim. The determination of our legal basis for a claim requires significant judgment. We estimate the change to the contract price using the variable consideration method described in the Step 3: Determine Contract Price paragraph above. Claims are more fully discussed in Note 7 - Commitments and Contingencies. Recently Issued Accounting Standards Accounting Standards Update 2016-02, Leases (Topic 842) On February 25, 2016, the FASB issued ASU 2016-02 that amends accounting for leases. Under the new guidance, lessees will recognize the following for all leases (with the exception of short-term leases) at the lease 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. The Company plans to apply the new leases standard using the modified retrospective method, which recognizes a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. The ASU is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption of the amendments is permitted, but we do not plan to do so at this time. We do not expect the ASU to have a material impact to the amount or pattern of recognition of the Company's earnings or cash flows. However, we do expect the ASU to have a material impact to the Company's balance sheet. As of June 30, 2018, the Company had $33.1 million of future minimum lease payments under non-cancelable operating leases, primarily for facilities. See Note 8 of Item 8. Financial Statements and Supplementary Data in our 2018 Form 10-K for more information about the timing and amount of future operating lease payments. We also have month-to-month rentals of equipment that are used directly on our job sites. At this time, we believe most of these rentals will not be capitalized; however our analysis is not yet complete and we cannot yet quantify the impact to our balance sheet. Our conclusions are preliminary and could change as we continue with the implementation. 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 amendments in this update are effective for the Company on July 1, 2020 and the Company may early adopt on July 1, 2019, but does not plan to do so at this time. 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. The Company adopted ASU 2017-09 on July 1, 2018, which did not have a material impact on our financial position, results of operations or cash flows.

Revenue Revenue (Notes)

9 Months Ended

Mar. 31, 2019

Revenue from Contract with Customer [Abstract]

Revenue from Contract with Customer [Text Block]

Revenue

Remaining Performance Obligations

The Company had $805.3 million of remaining performance obligations yet to be satisfied as of March 31, 2019. The Company expects to recognize approximately $714.2 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:



	March 31, 2019			June 30, 2018			Change
	(in thousands)
Costs and estimated earnings in excess of billings on uncompleted contracts	$	75,353		$	76,632		$	(1,279	)
Billings on uncompleted contracts in excess of costs and estimated earnings	(122,235		)	(120,740		)	(1,495		)
Net contract liabilities	$	(46,882	)	$	(44,108	)	$	(2,774	)

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 nine months ended March 31, 2019 that was included in the prior period BIE balance was $120.7 million. This revenue consists primarily of work performed during the period on contracts with customers that had advance billings.

Gross amounts of contact assets and liabilities on uncompleted contracts are as follows:



	March 31, 2019			June 30, 2018
	(in thousands)
Costs incurred and estimated earnings recognized on uncompleted contracts	$	1,765,137		$	2,081,799
Billings on uncompleted contracts	1,812,019			2,125,907
Net contract liabilities	$	(46,882	)	$	(44,108	)

Progress billings in accounts receivable at March 31, 2019 and June 30, 2018 included retentions to be collected within one year of $20.8 million and $25.9 million, respectively. Contract retentions collectible beyond one year are included in other assets in the Condensed Consolidated Balance Sheet and totaled $17.1 million as of March 31, 2019 and $2.6 million as of June 30, 2018.

Disaggregated Revenue

Revenue disaggregated by reportable segment is presented in Note 9 - Segment Information. The following table presents revenue disaggregated by the geographic area where the work was performed:



	Three Months Ended				Nine Months Ended
	March 31, 2019		March 31, 2018		March 31, 2019		March 31, 2018
	(In thousands)
United States	$	345,953	$	226,089	$	985,603	$	706,934
Canada	10,691		18,056		27,486		87,911
Other international	2,243		1,500		4,877		3,621
Total Revenue	$	358,887	$	245,645	$	1,017,966	$	798,466

Disposals (Notes)	9 Months Ended
Disposals (Notes)	Mar. 31, 2019
Business Combinations [Abstract]
Disposals	Disposals Sale of Process Heating Business In August 2018, the Company sold non-core assets associated with a business that marketed process heating equipment for $3.9 million in cash, including $0.2 million of customary final post-closing adjustments paid in October 2018. The Company recognized a gain of $0.4 million on the sale, which was included in Other in the Condensed Consolidated Statements of Income. The revenues and operating results of the business, which were included in the Oil Gas & Chemical segment, were not material.

Intangible Assets Including Goodwill (Notes)

9 Months Ended

Mar. 31, 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, 2018	$	24,826		$	33,604		$	16,760		$	20,972		$	96,162
Disposal of business⁽¹⁾	—			(2,775		)	—			—			(2,775		)
Translation adjustment⁽²⁾	(19		)	—			(49		)	(3		)	(71		)
Net balance at March 31, 2019	$	24,807		$	30,829		$	16,711		$	20,969		$	93,316

(1)

In August 2018, the Company disposed of a business that marketed process heating equipment. See Note 3 - Disposals for more information about the disposal. The business disposed of constituted its own reporting unit and the amount of goodwill written off was all of the goodwill assigned to that reporting unit. None of the goodwill was considered impaired since the Company recorded a gain on the disposal.


(2)	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 March 31, 2019. However, if our market view of project opportunities or gross margins deteriorates, then the annual goodwill impairment test 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 March 31, 2019
	Useful Life	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
	(Years)	(In thousands)
Intellectual property	10 to 15	$	2,579	$	(1,735	)	$	844
Customer-based	6 to 15	38,491		(19,074		)	19,417
Non-compete agreements	4	1,453		(1,432		)	21
Total amortizing intangible assets		$	42,523	$	(22,241	)	$	20,282



		At June 30, 2018
	Useful Life	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
	(Years)	(In thousands)
Intellectual property	9 to 15	$	2,579	$	(1,603	)	$	976
Customer-based	6 to 15	38,562		(16,763		)	21,799
Non-compete agreements	4	1,453		(1,414		)	39
Total amortizing intangible assets		$	42,594	$	(19,780	)	$	22,814

Amortization expense totaled $0.8 million and $2.5 million during the three and nine months ended March 31, 2019 and $0.9 million and $3.9 million during the three and nine months ended March 31, 2018, respectively.

We estimate that the remaining amortization expense was related to March 31, 2019 amortizing intangible assets will be as follows (in thousands):



Period ending:
Remainder of Fiscal 2019	$	936
Fiscal 2020	3,735
Fiscal 2021	3,716
Fiscal 2022	2,875
Fiscal 2023	2,424
Fiscal 2024	2,122
Thereafter	4,474
Total estimated remaining amortization expense at March 31, 2019	$	20,282

Debt (Notes)

9 Months Ended

Mar. 31, 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 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 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 March 31, 2019, Covenant EBITDA was $51.4 million. Consolidated Funded Indebtedness at March 31, 2019 was $23.9 million.

Availability under the senior secured revolving credit facility at March 31, 2019 was as follows:



	March 31, 2019		June 30, 2018
	(In thousands)
Senior secured revolving credit facility	$	300,000	$	300,000
Capacity constraint due to the Leverage Ratio	145,812		189,741
Capacity under the credit facility	154,188		110,259
Borrowings outstanding	2,172		—
Letters of credit	21,694		37,073
Availability under the senior secured revolving credit facility	$	130,322	$	73,186

At March 31, 2019, the Company was in compliance with all affirmative, negative, and financial covenants under the Credit Agreement.

Income Taxes (Notes)

9 Months Ended

Mar. 31, 2019

Income Tax Disclosure [Abstract]

Income Taxes

Tax Cuts and Jobs Act

The Tax Cuts and Jobs Act (the "Act") was enacted on December 22, 2017. The Act makes broad and complex changes to the U.S. tax code, which have affected our current results and will affect our future results.

The following are significant changes in the tax code that became effective for the Company beginning July 1, 2018:


•	eliminating the deduction for domestic production activity;


•	limiting the annual deduction for business interest;


•	taxing global intangible low-tax income;


•	allowing a deduction for domestically earned foreign intangible income; and


•	establishing a new base erosion and anti-abuse tax on payments between U.S. taxpayers and foreign related parties.

We completed the accounting for the Act as of December 31, 2018 and accounted for the tax effect of the Act as follows:

Deferred Taxes Remeasurement

We remeasured our domestic deferred tax assets and liabilities based on the rates at which we expect them to reverse in the future. At June 30, 2018, we completed the remeasurement of our domestic deferred tax assets and liabilities which resulted in an income tax benefit of $0.5 million included in fiscal 2018.

One-time Transition Tax on Unrepatriated Earnings of Certain Foreign Subsidiaries

The Act includes a one-time transition tax based on our total post-1986 foreign earnings and profits ("E&P") which we have previously deferred from U.S. income taxes. Based on our completed calculations surrounding this tax, we incurred no additional tax related to this provision since our foreign subsidiaries have overall negative E&P.

Global Intangible Low-Tax Income (“GILTI”)

The Act creates a new requirement that certain income earned by controlled foreign corporations must be included currently in the gross income of the U.S. shareholder. Under U.S. GAAP, we have made an accounting policy election to treat taxes due on future U.S. inclusions in taxable income related to GILTI as a current-period expense when incurred instead of factoring such amounts into the measurement of our deferred taxes. For fiscal 2019, we project to have no U.S. taxable income inclusion related to GILTI.

Valuation Allowances on Foreign Tax Credit Carryforwards

We continue to assess our ability to utilize our foreign tax credits in light of the lower U.S. federal income tax rate. As of March 31, 2019, we had $1.5 million of foreign tax credit carryforwards, the majority of which relate to our branch operations in Canada. Future operations of our Canadian branches will impact our ability to utilize these credits. During this quarter we concluded that we are unlikely to realize the benefit of foreign tax credits generated by our Canadian operations, which expire in fiscal 2021. Therefore, we recorded a valuation allowance of $0.6 million. During our second fiscal quarter, we placed a valuation on $0.2 million of credits expiring in fiscal 2019 and fiscal 2020. The remaining $0.7 million of credits will expire in fiscal 2023 through fiscal 2025 if not utilized.

Indefinite Reinvestment Assertion

We do not provide for outside basis differences under the indefinite reinvestment assertion of ASC 740-30. Based on our analysis of the Act, we do not anticipate the need to provide for additional taxes for basis differences or withholding taxes on remitted foreign earnings in the immediate future.

Effective Tax Rate

Our effective tax rates for the three and nine months ended March 31, 2019 were 30.5% and 27.9%, respectively, compared to 14.2% and 38.1% for the same periods a year ago. We expected our fiscal 2019 effective tax rate to be approximately 27.0%. The effective tax rates for both periods in fiscal 2019 were negatively impacted by a valuation allowance of $0.6 million placed on foreign tax credits generated by our operations in Canada, which we believe will not be utilized prior to their expiration. The effective tax rate for the nine months ended March 31, 2019 was positively impacted by $0.3 million of excess tax benefits related to the vesting of stock-based compensation.

Commitments and Contingencies (Notes)	9 Months Ended
Commitments and Contingencies (Notes)	Mar. 31, 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 $11.5 million at March 31, 2019 and $15.0 million at June 30, 2018. 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)

9 Months Ended

Mar. 31, 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					Nine Months Ended
	March 31, 2019		March 31, 2018			March 31, 2019		March 31, 2018
	(In thousands, except per share data)
Basic EPS:
Net income (loss)	$	8,933	$	(5,153	)	$	15,170	$	3,203
Weighted average shares outstanding	26,788		26,817			26,918		26,747
Basic earnings (loss) per share	$	0.33	$	(0.19	)	$	0.56	$	0.12
Diluted EPS:
Weighted average shares outstanding – basic	26,788		26,817			26,918		26,747
Dilutive stock options	27		—			28		29
Dilutive nonvested deferred shares	602		—			641		278
Diluted weighted average shares	27,417		26,817			27,587		27,054
Diluted earnings (loss) per share	$	0.33	$	(0.19	)	$	0.55	$	0.12

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



	Three Months Ended		Nine Months Ended
	March 31, 2019	March 31, 2018	March 31, 2019	March 31, 2018
	(In thousands)
Stock options	—	37	—	—
Nonvested deferred shares	188	459	152	276
Total antidilutive securities	188	496	152	276

Segment Information (Notes)

9 Months Ended

Mar. 31, 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 high voltage 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 turnarounds, plant maintenance, 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, 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, 2018. 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, CIE/BIE, property, plant and equipment, goodwill and other intangible assets.

Results of Operations

(In thousands)



	Three Months Ended					Nine Months Ended
	March 31, 2019		March 31, 2018			March 31, 2019		March 31, 2018
Gross revenues
Electrical Infrastructure	$	60,669	$	58,378		$	163,543	$	203,201
Oil Gas & Chemical	83,414		68,689			246,497		242,946
Storage Solutions	134,822		78,859			374,787		221,664
Industrial	81,283		41,976			237,225		134,507
Total gross revenues	$	360,188	$	247,902		$	1,022,052	$	802,318
Less: Inter-segment revenues
Oil Gas & Chemical	$	870	$	299		$	2,175	$	544
Storage Solutions	431		1,958			1,911		3,307
Industrial	—		—			—		1
Total inter-segment revenues	$	1,301	$	2,257		$	4,086	$	3,852
Consolidated revenues
Electrical Infrastructure	$	60,669	$	58,378		$	163,543	$	203,201
Oil Gas & Chemical	82,544		68,390			244,322		242,402
Storage Solutions	134,391		76,901			372,876		218,357
Industrial	81,283		41,976			237,225		134,506
Total consolidated revenues	$	358,887	$	245,645		$	1,017,966	$	798,466
Gross profit
Electrical Infrastructure	$	6,210	$	1,759		$	13,155	$	15,567
Oil Gas & Chemical	10,736		4,744			25,518		27,550
Storage Solutions	14,575		4,166			35,275		17,004
Industrial	5,385		4,222			14,265		10,364
Total gross profit	$	36,906	$	14,891		$	88,213	$	70,485
Operating income (loss)
Electrical Infrastructure	$	2,882	$	(2,422	)	$	3,977	$	2,234
Oil Gas & Chemical	4,796		(648		)	8,895		8,684
Storage Solutions	3,730		(4,025		)	5,371		(6,709		)
Industrial	1,386		1,233			2,298		2,424
Total operating income (loss)	$	12,794	$	(5,862	)	$	20,541	$	6,633

Total assets by segment were as follows:



	March 31, 2019		June 30, 2018
Electrical Infrastructure	$	152,631	$	161,207
Oil Gas & Chemical	121,978		111,064
Storage Solutions	215,197		149,695
Industrial	74,666		58,816
Unallocated assets	66,961		77,251
Total segment assets	$	631,433	$	558,033

Basis of Presentation Revenue Recognition (Policies)	9 Months Ended
Basis of Presentation Revenue Recognition (Policies)	Mar. 31, 2019
Revenue Recognition [Abstract]
Revenue Recognition, Policy [Policy Text Block]	Revenue Recognition Adoption of New Revenue Recognition Standard The Company adopted ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) on July 1, 2018. The standard outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most previous revenue recognition guidance, including industry-specific guidance, and is applicable to all of the Company's contracts with customers. 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 Company used the modified retrospective method of application. Under the modified retrospective method, revenue recognized on completed contracts is not restated, however contracts in progress are accounted for as if they were under this new standard at inception. Any difference between historical revenue and revenue under the new standard is recorded as a cumulative effect adjustment to retained earnings as of the date of adoption. The cumulative impact of adopting Topic 606 was immaterial and did not require an adjustment to retained earnings. See Note 2 – Revenue for new disclosures required as a result of adopting Topic 606. General Information about our Contracts with Customers Our revenues come from contracts to provide engineering, procurement, fabrication and construction, repair and maintenance and other services. Our engineering, procurement and fabrication and construction services are usually provided in association with capital projects, which commonly are fixed price contracts and are billed based on project milestones. Our repair and maintenance services typically are cost reimbursable or time and material based contracts and are billed monthly or, for projects of short duration, at the conclusion of the project. The elapsed time from award to completion of performance may be in excess of one year for capital projects. Step 1: Contract Identification We do not recognize revenue unless we have identified a contract with a customer. A contract with a customer exists when it has approval and commitment from both parties, the rights and obligations of the parties are identified, payment terms are identified, the contract has commercial substance, and collectibility is probable. We also evaluate whether a contract should be combined with other contracts and accounted for as one single contract. This evaluation requires judgment and could change the timing of the amount of revenue and profit recorded for a given period. Step 2: Identify Performance Obligations Next, we identify each performance obligation in the contract. A performance obligation is a promise to provide a distinct good or service or a series of distinct goods or services to the customer. Revenue is recognized separately for each performance obligation in the contract. Many of our contracts have one clearly identifiable performance obligation. However, many of our contracts provide the customer an integrated service that includes two or more of the following services: engineering, procurement, fabrication, construction, repair and maintenance services. For these contracts, we do not consider the integrated services to be distinct within the context of the contract when the separate scopes of work combine into a single commercial objective or capability for the customer. Accordingly, we generally identify one performance obligation in our contracts. The determination of the number of performance obligations in a contract requires significant judgment and could change the timing of the amount of revenue recorded for a given period. Step 3: Determine Contract Price After determining the performance obligations in the contract, we determine the contract price. The contract price is the amount of consideration we expect to receive from the customer for completing the performance obligation(s). In a fixed price contract, the contract price is a single lump-sum amount. In reimbursable and time and materials based contracts, the contract price is determined by the agreed upon rates or reimbursements for time and materials expended in completing the performance obligation(s) in the contract. A number of our contracts contain various cost and performance incentives and penalties that can either increase or decrease the contract price. These variable consideration amounts are generally earned or incurred based on certain performance metrics, most commonly related to project schedule or cost targets. We estimate variable consideration at the most likely amount of additional consideration to be received (or paid in the case of penalties), provided that meeting the variable condition is probable. We include estimated amounts of variable consideration in the contract price to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is resolved. Our estimates of variable consideration and determination of whether to include estimated amounts in the contract price are based largely on an assessment of our anticipated performance and all information (historical, current and forecasted) that is reasonably available to us. We reassess the amount of variable consideration each accounting period until the uncertainty associated with the variable consideration is resolved. Changes in the assessed amount of variable consideration are accounted for prospectively as a cumulative adjustment to revenue recognized in the current period. Step 4: Assign Contract Price to Performance Obligations After determining the contract price, we assign such price to the performance obligation(s) in the contract. If a contract has multiple performance obligations, we assign the contract price to each performance obligation based on the stand-alone selling prices of the distinct services that comprise each performance obligation. Step 5: Recognize Revenue as Performance Obligations are Satisfied We record revenue for contracts with our customers as we satisfy the contracts' performance obligations. We recognize revenue on performance obligations associated with fixed price contracts for engineering, procurement and construction services over time since these services create or enhance assets the customer controls as they are being created or enhanced. We measure progress of satisfying these performance obligations by using the percentage-of-completion method, which is based on costs incurred to date compared to the total estimated costs at completion, since it best depicts the transfer of control of assets being created or enhanced to the customer. We recognize revenue over time for reimbursable and time and material based repair and maintenance contracts since the customer simultaneously receives and consumes the benefit of those services as we perform work under the contract. As a practical expedient allowed under ASC 606, we record revenue for these contracts in the amount to which we have a right to invoice for the services performed provided that we have a right to consideration from the customer in an amount that corresponds directly with the value of the performance completed to date. Costs incurred may include direct labor, direct materials, subcontractor costs and indirect costs, such as salaries and benefits, supplies and tools, equipment costs and insurance costs. Indirect costs are charged to projects based upon direct costs and overhead allocation rates per dollar of direct costs incurred or direct labor hours worked. Typically, customer contracts will include standard warranties that provide assurance that products and services will function as expected. The Company does not sell separate warranties. We have numerous contracts that are in various stages of completion which require estimates to determine the forecasted costs at completion. Due to the nature of the work left to be performed on many of our contracts, the estimation of total cost at completion for fixed price contracts is complex, subject to many variables and requires significant judgment. Estimates of total cost at completion are made each period and changes in these estimates are accounted for prospectively as cumulative adjustments to revenue recognized in the current period. If estimates of costs to complete fixed price contracts indicate a loss, a provision is made through a contract write-down for the total loss anticipated. Change Orders Contracts are often modified through change orders, which are changes to the agreed upon scope of work. Most of our change orders, which may be priced or unpriced, are for goods or services that are not distinct from the existing contract due to the significant integration of services provided in the context of the contract and are accounted for as if they were part of that existing contract. The effect of a change order on the contract price and our measure of progress for the performance obligation to which it relates, is recognized as an adjustment to revenue on a cumulative catch-up basis. For unpriced change orders, we estimate the increase or decrease to the contract price using the variable consideration method described in the Step 3: Determine Contract Price paragraph above. Unpriced change orders are more fully discussed in Note 7 - Commitments and Contingencies. Claims Sometimes we seek claims for amounts in excess of the contract price for delays, errors in specifications and designs, contract terminations, change orders in dispute or other causes of additional costs incurred by us. Recognition of amounts as additional contract price related to claims is appropriate only if there is a legal basis for the claim. The determination of our legal basis for a claim requires significant judgment. We estimate the change to the contract price using the variable consideration method described in the Step 3: Determine Contract Price paragraph above. Claims are more fully discussed in Note 7 - Commitments and Contingencies.

Revenue Revenue (Tables)

9 Months Ended

Mar. 31, 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:



	March 31, 2019			June 30, 2018			Change
	(in thousands)
Costs and estimated earnings in excess of billings on uncompleted contracts	$	75,353		$	76,632		$	(1,279	)
Billings on uncompleted contracts in excess of costs and estimated earnings	(122,235		)	(120,740		)	(1,495		)
Net contract liabilities	$	(46,882	)	$	(44,108	)	$	(2,774	)

Disclosure Customer Contracts Additional Information [Abstract]

Gross and Net Amount of Uncompleted Contracts

Gross amounts of contact assets and liabilities on uncompleted contracts are as follows:



	March 31, 2019			June 30, 2018
	(in thousands)
Costs incurred and estimated earnings recognized on uncompleted contracts	$	1,765,137		$	2,081,799
Billings on uncompleted contracts	1,812,019			2,125,907
Net contract liabilities	$	(46,882	)	$	(44,108	)

Disaggregation of Revenue [Abstract]

Disaggregation of Revenue [Table Text Block]

The following table presents revenue disaggregated by the geographic area where the work was performed:



	Three Months Ended				Nine Months Ended
	March 31, 2019		March 31, 2018		March 31, 2019		March 31, 2018
	(In thousands)
United States	$	345,953	$	226,089	$	985,603	$	706,934
Canada	10,691		18,056		27,486		87,911
Other international	2,243		1,500		4,877		3,621
Total Revenue	$	358,887	$	245,645	$	1,017,966	$	798,466

Intangible Assets Including Goodwill (Tables)

9 Months Ended

Mar. 31, 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, 2018	$	24,826		$	33,604		$	16,760		$	20,972		$	96,162
Disposal of business⁽¹⁾	—			(2,775		)	—			—			(2,775		)
Translation adjustment⁽²⁾	(19		)	—			(49		)	(3		)	(71		)
Net balance at March 31, 2019	$	24,807		$	30,829		$	16,711		$	20,969		$	93,316

(1)


(2)	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 March 31, 2019
	Useful Life	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
	(Years)	(In thousands)
Intellectual property	10 to 15	$	2,579	$	(1,735	)	$	844
Customer-based	6 to 15	38,491		(19,074		)	19,417
Non-compete agreements	4	1,453		(1,432		)	21
Total amortizing intangible assets		$	42,523	$	(22,241	)	$	20,282



		At June 30, 2018
	Useful Life	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
	(Years)	(In thousands)
Intellectual property	9 to 15	$	2,579	$	(1,603	)	$	976
Customer-based	6 to 15	38,562		(16,763		)	21,799
Non-compete agreements	4	1,453		(1,414		)	39
Total amortizing intangible assets		$	42,594	$	(19,780	)	$	22,814

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



Period ending:
Remainder of Fiscal 2019	$	936
Fiscal 2020	3,735
Fiscal 2021	3,716
Fiscal 2022	2,875
Fiscal 2023	2,424
Fiscal 2024	2,122
Thereafter	4,474
Total estimated remaining amortization expense at March 31, 2019	$	20,282

Debt (Tables)

9 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Availability Under the Senior Credit Facility

Availability under the senior secured revolving credit facility at March 31, 2019 was as follows:



	March 31, 2019		June 30, 2018
	(In thousands)
Senior secured revolving credit facility	$	300,000	$	300,000
Capacity constraint due to the Leverage Ratio	145,812		189,741
Capacity under the credit facility	154,188		110,259
Borrowings outstanding	2,172		—
Letters of credit	21,694		37,073
Availability under the senior secured revolving credit facility	$	130,322	$	73,186

Earnings per Common Share (Tables)

9 Months Ended

Mar. 31, 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					Nine Months Ended
	March 31, 2019		March 31, 2018			March 31, 2019		March 31, 2018
	(In thousands, except per share data)
Basic EPS:
Net income (loss)	$	8,933	$	(5,153	)	$	15,170	$	3,203
Weighted average shares outstanding	26,788		26,817			26,918		26,747
Basic earnings (loss) per share	$	0.33	$	(0.19	)	$	0.56	$	0.12
Diluted EPS:
Weighted average shares outstanding – basic	26,788		26,817			26,918		26,747
Dilutive stock options	27		—			28		29
Dilutive nonvested deferred shares	602		—			641		278
Diluted weighted average shares	27,417		26,817			27,587		27,054
Diluted earnings (loss) per share	$	0.33	$	(0.19	)	$	0.55	$	0.12

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		Nine Months Ended
	March 31, 2019	March 31, 2018	March 31, 2019	March 31, 2018
	(In thousands)
Stock options	—	37	—	—
Nonvested deferred shares	188	459	152	276
Total antidilutive securities	188	496	152	276

Segment Information (Tables)

9 Months Ended

Mar. 31, 2019

Segment Reporting [Abstract]

Results of Operations

(In thousands)



	Three Months Ended					Nine Months Ended
	March 31, 2019		March 31, 2018			March 31, 2019		March 31, 2018
Gross revenues
Electrical Infrastructure	$	60,669	$	58,378		$	163,543	$	203,201
Oil Gas & Chemical	83,414		68,689			246,497		242,946
Storage Solutions	134,822		78,859			374,787		221,664
Industrial	81,283		41,976			237,225		134,507
Total gross revenues	$	360,188	$	247,902		$	1,022,052	$	802,318
Less: Inter-segment revenues
Oil Gas & Chemical	$	870	$	299		$	2,175	$	544
Storage Solutions	431		1,958			1,911		3,307
Industrial	—		—			—		1
Total inter-segment revenues	$	1,301	$	2,257		$	4,086	$	3,852
Consolidated revenues
Electrical Infrastructure	$	60,669	$	58,378		$	163,543	$	203,201
Oil Gas & Chemical	82,544		68,390			244,322		242,402
Storage Solutions	134,391		76,901			372,876		218,357
Industrial	81,283		41,976			237,225		134,506
Total consolidated revenues	$	358,887	$	245,645		$	1,017,966	$	798,466
Gross profit
Electrical Infrastructure	$	6,210	$	1,759		$	13,155	$	15,567
Oil Gas & Chemical	10,736		4,744			25,518		27,550
Storage Solutions	14,575		4,166			35,275		17,004
Industrial	5,385		4,222			14,265		10,364
Total gross profit	$	36,906	$	14,891		$	88,213	$	70,485
Operating income (loss)
Electrical Infrastructure	$	2,882	$	(2,422	)	$	3,977	$	2,234
Oil Gas & Chemical	4,796		(648		)	8,895		8,684
Storage Solutions	3,730		(4,025		)	5,371		(6,709		)
Industrial	1,386		1,233			2,298		2,424
Total operating income (loss)	$	12,794	$	(5,862	)	$	20,541	$	6,633

Total assets by segment were as follows:



	March 31, 2019		June 30, 2018
Electrical Infrastructure	$	152,631	$	161,207
Oil Gas & Chemical	121,978		111,064
Storage Solutions	215,197		149,695
Industrial	74,666		58,816
Unallocated assets	66,961		77,251
Total segment assets	$	631,433	$	558,033

Basis of Presentation Basis of Presentation - Narrative (Details) $ in Millions	Jun. 30, 2018 USD ($)
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Operating Leases, Future Minimum Payments Due	$ 33.1

Revenue Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Revenue Revenue (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Jun. 30, 2018
Revenue, Performance Obligation [Abstract]
Revenue, Remaining Performance Obligation, Amount	$ 805,300		$ 805,300
Performance obligations to be recognized as revenue within next twelve months	714,200		714,200
Contract with Customer, Asset and Liability [Abstract]
Costs and estimated earnings in excess of billings on uncompleted contracts	75,353		75,353		$ 76,632
Change in CIE			(1,279)
Billings on uncompleted contracts in excess of costs and estimated earnings	(122,235)		(122,235)		(120,740)
Change in BIE			(1,495)
Change in net contract balances			(2,774)
Contract with Customer, Liability, Revenue Recognized			120,700
Disclosure Customer Contracts Additional Information [Abstract]
Costs incurred and estimated earnings recognized on uncompleted contracts	1,765,137		1,765,137		2,081,799
Billings on uncompleted contracts	1,812,019		1,812,019		2,125,907
Total	(46,882)		(46,882)		(44,108)
Contract Receivable Retainage, Due in Next Twelve Months	20,800		20,800		25,900
Contract Receivable Retainage, Due after Next Twelve Months	17,100		17,100		$ 2,600
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	358,887	$ 245,645	1,017,966	$ 798,466
United States
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	345,953	226,089	985,603	706,934
Canada
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	10,691	18,056	27,486	87,911
Other international [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	$ 2,243	$ 1,500	$ 4,877	$ 3,621

Disposals (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended		9 Months Ended
Disposals (Narrative) (Details) - USD ($) $ in Thousands	Oct. 31, 2018	Aug. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Business Acquisition [Line Items]
Business Combination, Consideration Transferred		$ 3,900
Acquisition Related Adjustment for Working Capital Settlement	$ 200
Gain (Loss) on Disposition of Business			$ 427	$ 0

Intangible Assets Including Goodwill - Carrying Value of Goodwill By Segment (Details) $ in Thousands	9 Months Ended
	Mar. 31, 2019 USD ($)
Goodwill [Line Items]
Goodwill	$ 96,162
Goodwill [Roll Forward]
Net balance at June 30, 2015	96,162
Goodwill, Written off Related to Sale of Business Unit	(2,775)
Translation adjustment	(71)
Net balance at March 31, 2019	93,316
Electrical Infrastructure [Member]
Goodwill [Line Items]
Goodwill	24,826
Goodwill [Roll Forward]
Net balance at June 30, 2015	24,826
Goodwill, Written off Related to Sale of Business Unit	0
Translation adjustment	(19)
Net balance at March 31, 2019	24,807
Oil Gas & Chemical [Member]
Goodwill [Line Items]
Goodwill	33,604
Goodwill [Roll Forward]
Net balance at June 30, 2015	33,604
Goodwill, Written off Related to Sale of Business Unit	(2,775)
Translation adjustment	0
Net balance at March 31, 2019	30,829
Storage Solutions [Member]
Goodwill [Line Items]
Goodwill	16,760
Goodwill [Roll Forward]
Net balance at June 30, 2015	16,760
Goodwill, Written off Related to Sale of Business Unit	0
Translation adjustment	(49)
Net balance at March 31, 2019	16,711
Industrial [Member]
Goodwill [Line Items]
Goodwill	20,972
Goodwill [Roll Forward]
Net balance at June 30, 2015	20,972
Goodwill, Written off Related to Sale of Business Unit	0
Translation adjustment	(3)
Net balance at March 31, 2019	$ 20,969

Intangible Assets Including Goodwill - Carrying Value of Other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Jun. 30, 2018
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 42,523		$ 42,523		$ 42,594
Accumulated Amortization	(22,241)		(22,241)		(19,780)
Net Carrying Amount	20,282		20,282		22,814
Total intangible assets, net carrying amount	20,282		20,282		22,814
Amortization expense	800	$ 900	2,500	$ 3,900
Intellectual Property [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	2,579		2,579		2,579
Accumulated Amortization	(1,735)		(1,735)		(1,603)
Net Carrying Amount	844		$ 844		976
Intellectual Property [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life			10 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	38,491		$ 38,491		38,562
Accumulated Amortization	(19,074)		(19,074)		(16,763)
Net Carrying Amount	19,417		$ 19,417		21,799
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		1,453
Finite-Lived Intangible Asset, Useful Life			4 years
Accumulated Amortization	(1,432)		$ (1,432)		(1,414)
Net Carrying Amount	$ 21		$ 21		$ 39
Noncompete Agreements [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life				4 years

Intangible Assets Including Goodwill - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Jun. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense	$ 800	$ 900	$ 2,500	$ 3,900
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	42,523		42,523		$ 42,594
Intellectual Property [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	2,579		2,579		2,579
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	38,491		38,491		38,562
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 1,453		$ 1,453		$ 1,453
Finite-Lived Intangible Asset, Useful Life			4 years
Minimum [Member] \| Intellectual Property [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life			10 years	9 years
Minimum [Member] \| Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life			6 years	6 years
Minimum [Member] \| Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life				4 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	Mar. 31, 2019	Jun. 30, 2018
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	$ 936
Finite-Lived Intangible Assets, Amortization Expense, Next Year	3,735
Finite-Lived Intangible Assets, Amortization Expense, Year Two	3,716
Finite-Lived Intangible Assets, Amortization Expense, Year Three	2,875
Finite-Lived Intangible Assets, Amortization Expense, Year Four	2,424
Finite-Lived Intangible Assets, Amortization Expense, Year Five	2,122
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	4,474
Finite-Lived Intangible Assets, Net	$ 20,282	$ 22,814

Debt - Additional Information (Detail) $ in Thousands	9 Months Ended
Debt - Additional Information (Detail) $ in Thousands	Mar. 31, 2019 USD ($) Rate	Jun. 30, 2018 USD ($)
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 \| $	$ 51,400
Consolidated funded indebtedness \| $	$ 23,900
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	Mar. 31, 2019	Jun. 30, 2018
Debt Disclosure [Abstract]
Senior credit facility	$ 300,000	$ 300,000
Capacity Constraint Due To Senior Leverage Ratio	145,812	189,741
Line Of Credit Facility Maximum Borrowing Capacity After Consideration Of Capacity Constraint	154,188	110,259
Line of Credit Facility, Amount Outstanding	2,172	0
Letters of credit subject to the credit facility	21,694	37,073
Availability under the senior credit facility	$ 130,322	$ 73,186

- 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		9 Months Ended		12 Months Ended
Income Taxes Income Taxes (Details) - USD ($) $ in Millions	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Jun. 30, 2018	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent	30.50%	14.20%	27.90%	38.10%
Deferred tax remeasurement					$ 0.5
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	$ 1.5		$ 1.5
Tax Credit Carryforward, Valuation Allowance	0.6		0.6			$ 0.2
Deferred Tax Assets, Foreign Tax Credit Carryforward, After Valuation Allowance	$ 0.7		0.7
Discrete item impact on effective tax rate			$ 0.3
Expected effective tax rate			27.00%

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	Mar. 31, 2019	Jun. 30, 2018
Project Unapproved Change Orders and Claims [Line Items]
Unapproved change orders and claims	$ 11.5	$ 15.0

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		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Earnings Per Share, Basic [Abstract]
Net income (loss)	$ 8,933	$ (5,153)	$ 15,170	$ 3,203
Weighted average shares outstanding - basic (shares)	26,788	26,817	26,918	26,747
Basic EPS (US$ per share)	$ 0.33	$ (0.19)	$ 0.56	$ 0.12
Earnings Per Share, Diluted [Abstract]
Dilutive stock options	27	0	28	29
Dilutive nonvested deferred shares	602	0	641	278
Diluted weighted average shares (shares)	27,417	26,817	27,587	27,054
Diluted EPS (US$ per share)	$ 0.33	$ (0.19)	$ 0.55	$ 0.12

- 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.

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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		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total antidilutive securities	188	496	152	276
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total antidilutive securities	0	37	0	0
Nonvested Deferred Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total antidilutive securities	188	459	152	276

Segment Information - Results of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Jun. 30, 2018
Segment Reporting Information [Line Items]
Gross revenues	$ 360,188	$ 247,902	$ 1,022,052	$ 802,318
Revenues	358,887	245,645	1,017,966	798,466
Gross profit	36,906	14,891	88,213	70,485
Operating income	12,794	(5,862)	20,541	6,633
Segment assets	631,433		631,433		$ 558,033
Electrical Infrastructure [Member]
Segment Reporting Information [Line Items]
Gross revenues	60,669	58,378	163,543	203,201
Revenues	60,669	58,378	163,543	203,201
Gross profit	6,210	1,759	13,155	15,567
Operating income	2,882	(2,422)	3,977	2,234
Segment assets	152,631		152,631		161,207
Oil Gas & Chemical [Member]
Segment Reporting Information [Line Items]
Gross revenues	83,414	68,689	246,497	242,946
Revenues	82,544	68,390	244,322	242,402
Gross profit	10,736	4,744	25,518	27,550
Operating income	4,796	(648)	8,895	8,684
Segment assets	121,978		121,978		111,064
Storage Solutions [Member]
Segment Reporting Information [Line Items]
Gross revenues	134,822	78,859	374,787	221,664
Revenues	134,391	76,901	372,876	218,357
Gross profit	14,575	4,166	35,275	17,004
Operating income	3,730	(4,025)	5,371	(6,709)
Segment assets	215,197		215,197		149,695
Industrial [Member]
Segment Reporting Information [Line Items]
Gross revenues	81,283	41,976	237,225	134,507
Revenues	81,283	41,976	237,225	134,506
Gross profit	5,385	4,222	14,265	10,364
Operating income	1,386	1,233	2,298	2,424
Segment assets	74,666		74,666		58,816
Other Segments [Member]
Segment Reporting Information [Line Items]
Segment assets	66,961		66,961		$ 77,251
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Gross revenues	1,301	2,257	4,086	3,852
Intersegment Eliminations [Member] \| Oil Gas & Chemical [Member]
Segment Reporting Information [Line Items]
Gross revenues	870	299	2,175	544
Intersegment Eliminations [Member] \| Storage Solutions [Member]
Segment Reporting Information [Line Items]
Gross revenues	431	1,958	1,911	3,307
Intersegment Eliminations [Member] \| Industrial [Member]
Segment Reporting Information [Line Items]
Gross revenues	$ 0	$ 0	$ 0	$ 1

Label	Element	Value
Proceeds from Divestiture of Businesses	us-gaap_ProceedsFromDivestitureOfBusinesses	$ 0