Commitments and Contingencies Disclosure [Abstract] Contingencies Commitments and Contingencies Disclosure [Text Block] Compensation and Retirement Disclosure [Abstract] Employee Benefit Plans Compensation and Employee Benefit Plans [Text Block] Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Common Stock [Member] Additional Paid-In Capital Additional Paid-in Capital [Member] Retained Earnings Retained Earnings [Member] Treasury Stock Treasury Stock [Member] Accumulated Other Comprehensive Income(Loss) Accumulated Other Comprehensive Income (Loss) [Member] Noncontrolling Interest Noncontrolling Interest [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Balances, beginning Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Other comprehensive loss Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Consolidated joint venture included in acquisition (Note 2) Payments to Acquire Interest in Joint Venture Exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Tax effect of exercised stock options and vesting of deferred shares Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Issuance of deferred shares Issuance Of Deferred Shares Issuance of deferred shares. Treasury Shares Sold to Employee Stock Purchase Plan (Note 12) Stock Issued During Period, Value, Employee Stock Purchase Plan Open market purchase of treasury shares (886,503 shares) Treasury Stock, Value, Acquired, Cost Method Other treasury share purchases Other Treasury Share Purchases Other treasury share purchases. Stock-based compensation expense Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Balances, ending Contractors [Abstract] Gross and net amount of uncompleted contracts Receivables, Long-term Contracts or Programs [Abstract] Costs and estimated earnings recognized on uncompleted contracts Uncompleted Contracts Costs Incurred And Estimated Earnings Recognized Uncompleted contracts costs incurred and estimated earnings recognized. Billings on uncompleted contracts Uncompleted Contracts Billings Uncompleted contracts billings. Total Uncompleted Contracts Net Uncompleted contracts. Shown on balance sheet as: Balance Sheet Balance sheet. Costs and estimated earnings in excess of billings on uncompleted contracts Costs in Excess of Billings, Current Billings on uncompleted contracts in excess of costs and estimated earnings Billings in Excess of Cost Total Costs in Excess of Billings Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Stock option activity and related information Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Number of options outstanding at June 30, 2013 Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Number of options granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Number of options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Number of options cancelled Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period Number of options outstanding at June 30, 2014 Number of options vested or expected to vest at June 30, 2014 Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Number of options exercisable at June 30, 2014 Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Weighted average remaining contractual life Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Weighted average remaining contractual life vested or expected to vest at June 30, 2014 Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Weighted average remaining contractual life exercisable at June 30, 2014 Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Weighted average exercise price at June 30, 2013 Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Weighted average exercise price granted Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Weighted average exercise price exercised Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Weighted average exercise price cancelled Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Weighted average exercise price at June 30, 2014 Weighted average exercise price vested or expected to vest at June 30, 2014 Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Weighted average exercise price exercisable at June 30, 2014 Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Aggregate intrinsic value exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Aggregate intrinsic value outstanding at June 30, 2014 Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Aggregate intrinsic value vested or expected to be vest at June 30, 2014 Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Aggregate intrinsic value exercisable at June 30, 2014 Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Subsequent Events [Abstract] Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Acquisition purchase price Payments to Acquire Businesses, Gross Income Tax Disclosure [Abstract] Unremitted earnings Undistributed Earnings of Foreign Subsidiaries Additional Paid-In Capital [Member] Retained Earnings [Member] Treasury Stock [Member] Exercise of stock options, shares Issuance of deferred shares, shares Deferred Shares Issued Deferred Shares Issued Employee Stock Purchase Plans, shares Stock Issued During Period, Shares, Employee Stock Purchase Plans Open market purchase of treasury shares, shares Treasury Stock, Shares, Acquired Other treasury share purchases Other Treasury Shares Acquired Other treasury shares acquired. Segment Reporting [Abstract] Results of Operations Schedule of Segment Reporting Information, by Segment [Table Text Block] Summary of revenues and long lived assets according to geographic areas Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] Quarterly Financial Information Disclosure [Abstract] Schedule of Quarterly Financial Data (Unaudited) Schedule of Quarterly Financial Information [Table Text Block] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Other Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Statement of Cash Flows [Abstract] Operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net income Adjustments to reconcile net income to net cash provided by operating activities, net of effects of acquisitions : Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization Stock-based compensation expense Share-based Compensation Deferred income taxes Deferred Income Tax Expense Benefit Socf Deferred income tax expense benefit socf. Allowance for uncollectible accounts Provision for Doubtful Accounts Impairment of Intangible Assets, Finite-lived Impairment of Intangible Assets, Finite-lived (Gain) loss on sale of property, plant and equipment Gain (Loss) on Disposition of Property Plant Equipment Other Other Noncash Income (Expense) Changes in operating assets and liabilities increasing (decreasing) cash, net of effects from acquisitions: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable Increase (Decrease) in Accounts Receivable Costs and estimated earnings in excess of billings on uncompleted contracts Increase Decrease In Costs And Estimated Earnings In Excess Of Billings On Uncompleted Contracts Increase Decrease In Costs And Estimated Earnings In Excess Of Billings On Uncompleted Contracts Inventories Increase (Decrease) in Inventories Other assets Increase (Decrease) in Other Operating Assets Accounts payable Increase (Decrease) in Accounts Payable Billings on uncompleted contracts in excess of costs and estimated earnings Increase (Decrease) in Billing in Excess of Cost of Earnings Accrued expenses Increase (Decrease) in Accrued Liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Acquisition of property, plant and equipment Payments to Acquire Property, Plant, and Equipment Acquisition Payments to Acquire Businesses, Net of Cash Acquired Acquisition related adjustment Acquisition Related Adjustment for Final Working Capital Settlement Acquisition related adjustment for the final working capital settlement. Proceeds from asset sales Proceeds from Sale of Productive Assets Net cash used for investing activities Net Cash Provided by (Used in) Investing Activities Financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Exercise of stock options Proceeds from Stock Options Exercised Capital lease payments Repayments of Long-term Capital Lease Obligations Excess tax benefit of exercised stock options and vesting of deferred shares Excess Tax Benefit from Share-based Compensation, Financing Activities Advances under credit agreement Proceeds from Long-term Lines of Credit Repayments of advances under credit agreement Repayments of Long-term Lines of Credit Payment of debt amendment fees Payments of Debt Issuance Costs Treasury shares sold to Employee Stock Purchase Plan Proceeds from Stock Plans Open market purchase of treasury shares Payments for Repurchase of Common Stock Other treasury share purchases Payments for Repurchase of Other Equity Net cash used by financing activities Net Cash Provided by (Used in) Financing Activities Effect of exchange rate changes on cash Effect of Exchange Rate on Cash and Cash Equivalents Net increase (decrease) in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents, beginning of period Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents, end of period Other cash flow information: Supplemental Cash Flow Information [Abstract] Income taxes Income Taxes Paid, Net Interest Interest Paid Non-cash investing: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Purchases of property, plant and equipment on account Capital Expenditures Incurred but Not yet Paid Schedule of Multiemployer Plans [Table] Schedule of Multiemployer Plans [Table] Multiemployer Plan Type [Axis] Multiemployer Plan Type [Axis] Multiemployer Plans Type [Domain] Multiemployer Plans Type [Domain] Multiemployer Plan Zone By Type [Axis] Multiemployer Plan Zone By Type [Axis] Multiemployer plan zone by type. Multiemployer Plan Zone By Type [Domain] Multiemployer Plan Zone By Type [Domain] Multiemployer plan zone by type. Zone Red [Member] Zone Red [Member] Zone red. Zone Yellow [Member] Zone Yellow [Member] Zone yellow. Zone Green [Member] Zone Green [Member] Zone green. Multiemployer Plans [Line Items] Multiemployer Plans [Line Items] Multiemployer Plans, Funding Improvement Plan and Rehabilitation Plan Multiemployer Plans, Funding Improvement Plan and Rehabilitation Plan Percentage of plan funded Percentage of Plan Funded Percentage of plan funded. Description of plans funded Description of Funded Portion of Plan Description of funded portion of plan. Employee Benefit Plans (Textual) [Abstract] Employee Benefit Plans (Textual) [Abstract] Employee benefit plans. Percentage of limitation on pretax compensation Defined Contribution Plan Maximum Annual Contribution by Employee Percent Maximum percentage of employee gross pay, by the terms of the plan, that the employee may contribute to a defined contribution plan. Company match of first 3% of employee contributions Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay Percentage of employee contribution for first half Percentage Of Employee Contribution As Base For Employer Contributions Percentage of employee contribution as base for employer contributions. Employee contribution for next 2% Defined Contribution Plan Employer Matching Contribution Percent For Two percent of Employee Contribution Defined contribution plan employer matching contribution percent for next two percent of employee contribution. Percentage of employee contribution for next half Percentage of Employee Contribution As Base for Employer Contribution to Match Percentage of employee contribution as base for employer contribution to match Contribution made by company Defined Contribution Plan, Cost Recognized Employee share purchase limit aggregate market value Employee Stock Purchase Plan Maximum Annual Share Purchase Limited To Aggregate Market Value Employee stock purchase plan per participant maximum annual share purchase limited to aggregate market value. Shares available at ESPP Employee Stock Purchase Plan Maximum Number Of Shares Available For Issuance Employee stock purchase plan maximum number of shares available for issuance. Employee Stock Purchase Plan, Termination Date Employee Stock Purchase Plan, Termination Date Employee Stock Purchase Plan, Termination Date Shares issued under ESPP Multiemployer Pension Plans Schedule of Multiemployer Plans [Table Text Block] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Geographical [Axis] Geographical [Axis] Segment, Geographical [Domain] Geographical [Domain] Domestic [Member] Domestic [Member] Domestic. International [Member] International [Member] International. Revenues from External Customers and Long-Lived Assets [Line Items] Revenues from External Customers and Long-Lived Assets [Line Items] Summary of revenues and long lived assets according to geographic areas Schedule Of Segment Reporting Information By Geographic Areas [Abstract] Schedule of segment reporting information by geographic areas. Revenues Sales Revenue, Services, Net Long-Lived Assets Long-Lived Assets Schedule of Goodwill [Table] Schedule of Goodwill [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Matrix NAC [Member] Matrix NAC [Member] Matrix NAC [Member] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Customer Based [Member] Customer Based [Member] Customer based member. Noncompete Agreements [Member] Noncompete Agreements [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Goodwill [Line Items] Goodwill [Line Items] Finite-lived Intangible Assets, Fair Value Disclosure Finite-lived Intangible Assets, Fair Value Disclosure Finite-Lived Intangible Asset, Useful Life Finite-Lived Intangible Asset, Useful Life Goodwill and Other Intangible Assets (Textual) [Abstract] Goodwill and Other Intangible Assets (Textual) [Abstract] Goodwill and other intangible assets. Amortization expense Amortization of Intangible Assets June 30, 2015 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months June 30, 2016 Finite-Lived Intangible Assets, Amortization Expense, Year Two June 30, 2017 Finite-Lived Intangible Assets, Amortization Expense, Year Three June 30, 2018 Finite-Lived Intangible Assets, Amortization Expense, Year Four June 30, 2019 Finite-Lived Intangible Assets, Amortization Expense, Year Five Thereafter Finite-Lived Intangible Assets, Amortization Expense, after Year Five Net carrying amount Finite-Lived Intangible Assets, Net Document And Entity Information [Abstract] Document And Entity Information [Abstract] Entities [Table] Entities [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Entity Information [Line Items] Entity Information [Line Items] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Current Fiscal Year End Date Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Entity Filer Category Entity Filer Category Entity Public Float Entity Public Float Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Business Combinations [Abstract] Acquisitions Business Combination Disclosure [Text Block] Debt Disclosure [Abstract] Availability under the senior credit facility Schedule of Line of Credit Facilities [Table Text Block] Components of the provision for income taxes Income Tax Expense (Benefit), Continuing Operations [Abstract] Current: Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Current Federal Tax Expense (Benefit) State Current State and Local Tax Expense (Benefit) Foreign Current Foreign Tax Expense (Benefit) Total Current Income Tax Expense (Benefit) Deferred: Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Deferred Federal Income Tax Expense (Benefit) State Deferred State and Local Income Tax Expense (Benefit) Foreign Deferred Foreign Income Tax Expense (Benefit) Total Deferred Income Tax Expense (Benefit) Provision for income taxes Income Tax Expense (Benefit) Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Investment, Name [Axis] Investment, Name [Axis] Investment, Name [Domain] Investment, Name [Domain] MXPB Power Partners [Member] MXPB Power Partners [Member] MXPB Power Partners [Member] Kvaerner North American Construction [Member] Kvaerner North American Construction [Member] Kvaerner North American Construction [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Stock acquired, percent Business Acquisition, Percentage of Voting Interests Acquired Acquisition price Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Goodwill Goodwill Tax deductible goodwill Business Acquisition, Goodwill, Expected Tax Deductible Amount Ownership interest in joint venture, percent Equity Method Investment, Ownership Percentage Equity of joint venture acquired mtrx_JointVentureValue mtrx_JointVentureValue Company's portion of joint venture equity acquired mtrx_ControllingInterestOfJointVenture,Value mtrx_MatrixShareOfJointVenture,Value Noncontrolling interest in joint venture Noncontrolling Interest in Joint Ventures Revenues Revenues Operating income Operating Income (Loss) Acquisition-related expenses Business Combination, Separately Recognized Transactions, Additional Disclosures, Acquisition Cost Expensed Incremental intangible amortization expense Business Acquisition, Pro Forma Amortization of Intangible Assets Business Acquisition, Pro Forma Amortization of Intangible Assets Depreciation expenses Business Acquisition, Pro Forma Depreciation Expense Business Acquisition, Pro Forma Depreciation Expense Income from one-time tax settlement Business Acquisition, Pro Forma Income from Tax Settlement Business Acquisition, Pro Forma Income from Tax Settlement Schedule of Revenue by Major Customers, by Reporting Segments [Table] Schedule of Revenue by Major Customers, by Reporting Segments [Table] Business Segments [Axis] Segments [Axis] Segment [Domain] Segments [Domain] Electrical Infrastructure [Member] Electrical Infrastructure [Member] Electrical infrastructure. Oil Gas & Chemical [Member] Oil Gas And Chemical [Member] Oil gas & chemical. Storage Solutions [Member] Storage Solutions [Member] Storage solutions. Industrial [Member] Industrial [Member] Industrial. Major Customers [Axis] Customer [Axis] Name of Major Customer [Domain] Customer [Domain] Customer One [Member] Customer One [Member] Customer one. Customer Two [Member] Customer Two [Member] Customer two. Customer Three [Member] Customer Three [Member] Customer three. Customer Four [Member] Customer Four [Member] Customer four. Customer Five [Member] [Member] Customer Five [Member] [Member] Customer Five [Member] [Member] Another Customer [Member] Another Customer [Member] Another customer. Revenue, Major Customer [Line Items] Revenue, Major Customer [Line Items] Percentage of Revenue Concentration Risk, Percentage Statement of Financial Position [Abstract] Assets Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Accounts receivable, less allowances (2014—$204; 2013—$795) Accounts Receivable, Net, Current Inventories Inventory, Net Income taxes receivable Income Taxes Receivable, Current Deferred income taxes Deferred Tax Assets, Net of Valuation Allowance, Current Other current assets Other Assets, Current Total current assets Assets, Current Property, plant and equipment, at cost: Property, Plant and Equipment, Gross [Abstract] Land and buildings Land Buildings And Improvements Gross Land Buildings And Improvements Gross Construction equipment Machinery and Equipment, Gross Transportation equipment Transportation Equipment Gross Transportation Equipment Gross Office equipment and software Office Equipment and Capitalized Computer Software Gross Office equipment and capitalized computer software gross. Construction in progress Construction in Progress, Gross Property, plant and equipment at cost, gross Property, Plant and Equipment, Gross Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property, plant and equipment at cost, net Property, Plant and Equipment, Net Other intangible assets Intangible Assets, Net (Excluding Goodwill) Other assets Other Assets, Noncurrent Total assets Assets Liabilities and stockholders' equity Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Billings on uncompleted contracts in excess of costs and estimated earnings Accrued wages and benefits Employee-related Liabilities, Current Accrued insurance Accrued Insurance, Current Other accrued expenses Other Liabilities, Current Total current liabilities Liabilities, Current Deferred income taxes Deferred Tax Liabilities, Net, Noncurrent Borrowings under senior credit facility Line of Credit Facility, Amount Outstanding Total liabilities Liabilities Commitments and contingencies Commitments and Contingencies Stockholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Common stock—$.01 par value; 60,000,000 shares authorized; 27,888,217 shares issued as of June 30, 2014 and June 30, 2013 Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Total stockholders' equity before treasury stock Stockholders' Equity before Treasury Stock Less treasury stock, at cost— 1,453,770 and 1,779,593 shares as of June 30, 2014 and June 30, 2013 Treasury Stock, Value Stockholders' Equity Attributable to Parent Stockholders' Equity Attributable to Parent Noncontrolling interest Total Matrix Service Company stockholders' equity Total liabilities and stockholders' equity Liabilities and Equity Carrying value of goodwill by segment Goodwill [Roll Forward] Goodwill Goodwill, Gross Cumulative impairment loss Goodwill, Impaired, Accumulated Impairment Loss Net Goodwill Purchase of Kvaerner North American Construction and Pelichem Goodwill, Acquired During Period Translation adjustment Goodwill, Translation Adjustments Net Goodwill Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Matrix Service Company's 2004 Stock and Incentive Compensation Plan [Member] Matrix Service Company's 2004 Stock and Incentive Compensation Plan [Member] Matrix Service Company's 2004 Stock and Incentive Compensation Plan (2004 Plan) [Member] Matrix Service Company's 2012 Stock and Incentive Compensation Plan [Member] Matrix Service Company's 2012 Stock and Incentive Compensation Plan [Member] Matrix Service Company's 2012 Stock and Incentive Compensation Plan (2012) [Member] Award Type [Axis] Award Type [Axis] Award Type [Domain] Equity Award [Domain] Market Based Awards [Member] Market Based Awards [Member] Market based awards. Vest in 2016 [Member] Vest in 2016 [Member] Vest in 2016 [Member] Vest in 2017 [Member] Vest in 2017 [Member] Vest in 2017 [Member] Type of Deferred Compensation [Axis] Type of Deferred Compensation [Axis] Type of Deferred Compensation, All Types [Domain] Type of Deferred Compensation, All Types [Domain] Employee Award [Member] Employee Award [Member] Employee Award. Minimum [Member] Maximum [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Unrecognized stock-based compensation expense Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Unrecognized stock-based compensation expense related to nonvested deferred shares Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options Unrecognized stock-based compensation expense related to stock options Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options Weighted average period Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Stock based compensation expense recognized tax Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Share awards authorized Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Share awards grant Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Common stock grant expiration term Share Based Compensation Arrangement By Share Based Payment Award Expiration Period Share based compensation arrangement by share based payment award expiration period. Total intrinsic value of stock option Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Vesting period, equal annual installments Share Based Compensation Arrangement By Share Based Payment Award Installment Period For Vesting Share based compensation arrangement by share based payment award installment period for vesting. Vesting period of director awards Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period of Director Awards Share based compensation arrangement by share based payment award award vesting period of director awards. Description of vesting period of director awards Share Based Compensation Arrangement By Share Based Payment Award Award Description of Vesting Period of Director Awards Share based compensation arrangement by share based payment award award description of vesting period of director award. Pro-rate of original awards, minimum Payout As Percentage Of Original Award Minimum Payout as percentage of original award minimum. Pro-rate of original awards maximum Payout As Percentage Of Original Award Maximum Payout as percentage of original award maximum. Minimum threshold shares scheduled to vest for performance based shares Minimum Threshold Shares Scheduled To Vest For Performance Based Shares Minimum threshold shares scheduled to vest for performance based shares. Deferred shares granted Share Based Compensation Arrangement By Share Based Payment Award Deferred Grants In Period Share based compensation arrangement by share based payment award deferred grants in period. Average grant date fair value Share Based Compensation Arrangement By Share Based Payment Award Deferred Weighted Average Grant Date Fair Value Share based compensation arrangement by share based payment award deferred weighted average grant date fair value. Deferred shares vested and released Share Based Compensation Arrangement By Share Based Payment Award Deferred Shares Vested And Released Share based compensation arrangement by share based payment award deferred shares vested and released. Weighted average fair value Share Based Compensation Arrangement By Share Based Payment Award Deferred Shares Vested And Released Weighted Average Grant Date Fair Value Share based compensation arrangement by share based payment award deferred shares vested and released weighted average grant date fair value. Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Method Used Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Method Used Share Based Compensation Arrangement By Share Based Payment Award Fair Value Method Number of Simulations Used Share Based Compensation Arrangement By Share Based Payment Award Fair Value Method Number of Simulations Used Share Based Compensation Arrangement By Share Based Payment Award Fair Value Method Number of Simulations Used Debt Debt Disclosure [Text Block] Stockholders' Equity Note [Abstract] Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Joint Pension Fund Local Union One Six Four Ibew [Member] Joint Pension Fund Local Union One Six Four Ibew [Member] Joint pension fund local union 164 Ibew. Boilermaker-Blacksmith National Pension Trust [Member] Boilermaker Blacksmith National Pension Trust [Member] Boilermaker blacksmith national pension trust. Joint Pension Fund Local Union Number One Zero Two [Member] [Domain] Joint Pension Fund Local Union Number One Zero Two [Member] [Domain] [Domain] for Joint Pension Fund Local Union Number One Zero Two IBEW Local Four Five Six Pension Plan [Member] [Domain] IBEW Local Four Five Six Pension Plan [Member] [Domain] [Domain] for IBEW Local Four Five Six Pension Plan Local 351 IBEW Pension Plan [Member] Local Three Five One Ibew Pension Plan [Member] Local 351 Ibew pension plan. Steamfitters Local Union Number Four Two Zero Pension Plan [Member] [Domain] Steamfitters Local Union Number Four Two Zero Pension Plan [Member] [Domain] [Domain] for Steamfitters Local Union Number Four Two Zero Pension Plan Indiana Laborers Pension Fund [Domain] Indiana Laborers Pension Fund [Domain] Indiana Laborers Pension Fund [Domain] Ironworkers Mid-America Pension Plan [Member] Ironworkers Mid-America Pension Plan [Member] Ironworkers Mid-America Pension Plan [Member] Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date, Description Multiemployer Plans, Collective-Bargaining Arrangement, Description Multiemployer Pension Plans Multiemployer Plans [Abstract] EIN/Pension Plan Number Multiemployer Plans Number Multiemployer plans number. Multiemployer Plans, Certified Zone Status, Description Multiemployer Plans, Certified Zone Status, Description Multiemployer Plans, Certified Zone Status, Description Pension Protection Act Zone Status Multiemployer Plans, Certified Zone Status FIP/RP Status Pending or Implemented Total contributions made Multiemployer Plan, Period Contributions Surcharge Imposed Multiemployer Plans, Surcharge Expiration Date of Collective-Bargaining Agreement Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date Contributions to other multiemployer plans Contributions To Other Multiemployer Plans Contributions to other multiemployer plans. Difference between expected income tax provision applying domestic federal statutory tax rate and reported income tax provision Effective Income Tax Rate Reconciliation, Amount [Abstract] Expected provision for Federal income taxes at the statutory rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount State income taxes, net of Federal benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Charges without tax benefit Income Tax Reconciliation Charges Without Tax Benefit Income Tax Reconciliation, Charges without tax benefit Change in valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Cumulative non-deductible expenses Income Tax Reconciliation Cumulative Non Deductible Expenses Income Tax Reconciliation, Cumulative non deductible expenses IRS S199 deduction Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Amount Research & Development Credit Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount Foreign tax differential Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount Other Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Carrying value of goodwill by segment Schedule of Goodwill [Table Text Block] Carrying value of other intangible assets Schedule Of Intangible Assets Excluding Goodwill Table [Table Text Block] Schedule of intangible assets excluding goodwill. Schedule of Finite-Lived Intangible Assets, Future Amortization Expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Segment Information Segment Reporting Disclosure [Text Block] Assumptions used to calculate grant date fair value Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Grant date fair value Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Expected life in years Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Expected dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Sales Revenue, Services, Net Gross Profit Gross Profit Net income Net Income (Loss) Attributable to Parent Basic earnings per common share (in dollars per share) Earnings Per Share, Basic Diluted earnings per common share (in dollars per share) Earnings Per Share, Diluted Leases [Abstract] Future minimum operating lease payable, in total Operating Leases, Future Minimum Payments Due Minimum operating lease payable, Fiscal 2015 Operating Leases, Future Minimum Payments Due, Next Twelve Months Minimum operating lease payable, Fiscal 2016 Operating Leases, Future Minimum Payments, Due in Two Years Minimum operating lease payable, Fiscal 2017 Operating Leases, Future Minimum Payments, Due in Three Years Minimum operating lease payable, Fiscal 2018 Operating Leases, Future Minimum Payments, Due in Four Years Minimum operating lease payable, Fiscal 2019 Operating Leases, Future Minimum Payments, Due in Five Years Minimum operating lease payable, Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Operating lease expense Operating Leases, Rent Expense Pelichem Industrial Cleaning Services, LLC [Member] Pelichem Industrial Cleaning Services, LLC [Member] Pelichem Industrial Cleaning Services, LLC [Member] Schedule of Business Acquisitions, by Acquisition Schedule of Business Acquisitions, by Acquisition [Table Text Block] Business Acquisition, Pro Forma Information Business Acquisition, Pro Forma Information [Table Text Block] Significant components of Company's deferred tax assets and liabilities as reported in consolidated balance sheets Deferred Tax Assets, Net, Classification [Abstract] Current deferred tax assets Non-current deferred tax liabilities Net deferred tax liability Deferred Tax Liabilities, Net Customer Contracts Long-term Contracts or Programs Disclosure [Text Block] Accounting Policies [Abstract] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Schedule of Acquired Indefinite-lived Intangible Assets by Major Class [Table] Schedule of Acquired Indefinite-lived Intangible Assets by Major Class [Table] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] CDOR Rate [Member] CDOR Rate [Member] CDOR Rate [Member] Canadian Prime Rate [Member] Canadian Prime Rate [Member] Canadian Prime Rate [Member] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Spread on variable rate basis (percent) Debt Instrument, Basis Spread on Variable Rate Unused Credit Facility Fee Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Line Of Credit Facility Maximum Borrowing Capacity After Consideration Of Capacity Constraint Line Of Credit Facility Maximum Borrowing Capacity After Consideration Of Capacity Constraint Line of credit facility maximum borrowing capacity after consideration of capacity constraint. Debt (Textual) [Abstract] Debt (Textual) [Abstract] Debt. Senior secured revolving credit facility Line of Credit Facility, Maximum Borrowing Capacity Line of Credit Facility, Expiration Date Line of Credit Facility, Expiration Date Senior Leverage Ratio, Maximum Senior Leverage Ratio Maximum Senior leverage ratio maximum. Senior Leverage Ratio, Minimum Senior Leverage Ratio Minimum Senior leverage ratio minimum. Fixed Charge Coverage Ratio, Maximum Fixed Charge Coverage Ratio Maximum Fixed charge coverage ratio maximum. Fixed Charge Coverage Ratio, Minimum Fixed Charge Coverage Ratio Minimum Fixed charge coverage ratio minimum. Limit on asset dispositions Amount Of Limit On Asset Dispositions Amount of limit on asset dispositions. Additional Margin on alternate base rate loans, Minimum Line Of Credit Basis Spread On Alternate Base Rate Minimum Line of credit basis spread on alternate base rate minimum. Additional Margin on alternate base rate loans, Maximum Line Of Credit Basis Spread On Alternate Base Rate Maximum Line of credit basis spread on alternate base rate maximum. Additional Margin on LIBOR loans, Minimum Line Of Credit Basis Spread On London Interbank Offered Rate Minimum Line of credit basis spread on London interbank offered rate minimum. Additional Margin on LIBOR loans, Maximum Line Of Credit Basis Spread On London Interbank Offered Rate Maximum Line of credit basis spread on London interbank offered rate maximum. Sublimit on Canadian dollar borrowings Amount Of Limit On Canadian Dollar Borrowings Amount of limit on Canadian dollar borrowings. Additional Margin on CDOR loans, Minimum Line Of Credit Basis Spread On Canadian Deposit Offered Rate Minimum Line of credit basis spread on Canadian deposit offered rate minimum. Additional Margin on CDOR loans, Maximum Line Of Credit Basis Spread On Canadian Deposit Offered Rate Maximum Line of credit basis spread on Canadian deposit offered rate maximum. Additional Margin on Canadian prime rate loans, Minimum Line Of Credit Basis Spread On Canadian Prime Rate Minimum Line of credit basis spread on Canadian prime rate minimum. Additional Margin on Canadian prime rate loans, Maximum Line Of Credit Basis Spread On Canadian Prime Rate Maximum Line of credit basis spread on Canadian prime rate maximum. Maximum limit of consolidated funded indebtedness Maximum Limit Of Consolidated Funded Indebtedness Maximum limit of consolidated funded indebtedness. Consolidated EBITDA as defined in the Credit Agreement Consolidated Earnings Before Interest Taxes Depreciation And Amortization Per Credit Agreement Consolidated earnings before interest taxes depreciation and amortization per credit. Consolidated Funded Indebtedness Consolidated Funded Indebtedness Consolidated Funded Indebtedness CDOR Rate description Line Of Credit Facility Canadian Deposit Offered Rate Description Line of credit facility Canadian deposit offered rate description. Canadian prime rate description Line Of Credit Facility Canadian Prime Rate Description Line of credit facility Canadian prime rate description. Stock option activity and related information Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Assumptions used to calculate grant date fair value Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Stock options information Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] Nonvested deferred share activity Schedule of Nonvested Share Activity [Table Text Block] Earnings Per Share [Abstract] Earnings Per Share, Basic and Diluted [Abstract] Earnings Per Share, Basic and Diluted [Abstract] Basic EPS: Earnings Per Share, Basic [Abstract] Weighted average shares outstanding Weighted Average Number of Shares Outstanding, Basic Basic EPS (in dollars per share) Diluted EPS: Earnings Per Share, Diluted [Abstract] Dilutive stock options Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Dilutive nonvested deferred shares Incremental Common Shares Attributable to Dilutive Effect of Nonvested Shares with Forfeitable Dividends Diluted weighted average shares Weighted Average Number of Shares Outstanding, Diluted Diluted EPS (in dollars per share) Statement of Comprehensive Income [Abstract] Foreign currency translation adjustments, tax effect Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax Income Taxes Income Tax Disclosure [Text Block] Stock-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Gross and net amount of uncompleted contracts Gross And Net Amount Of Uncompleted Contracts Table [Text Block] Gross and net amount of uncompleted contracts. Claims related to unapproved change orders Accounts Receivable, Unapproved Contract Claims Operating Leases Leases of Lessee Disclosure [Text Block] Nonvested deferred share activity Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Nonvested shares at June 30, 2013 Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Shares granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Shares vested and released Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Shares cancelled Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Nonvested shares at June 30, 2014 Weighted average grant date fair value per share at June 30, 2013 Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Weighted average grant date fair value per share granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Weighted average grant date fair value per share vested and released Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Weighted average grant date fair value per share cancelled Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Weighted average grant date fair value per share at June 30, 2014 Schedule of sources of pretax income Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Components of the provision for income taxes Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Difference between expected income tax provision applying domestic federal statutory tax rate and reported income tax provision Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Significant components of Company's deferred tax assets and liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Significant components of Company's deferred tax assets and liabilities as reported in consolidated balance sheets Schedule of Components of Deferred Tax Assets and Liabilities Net [Table Text Block] Schedule of components of deferred tax assets and Liabilities, net. Summary of Operating Loss Carryforwards Summary of Operating Loss Carryforwards [Table Text Block] Summary of Tax Credit Carryforwards Summary of Tax Credit Carryforwards [Table Text Block] Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table] Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table] Exercise Price Range [Axis] Exercise Price Range [Axis] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Domain] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Domain] Range One [Member] Range One [Member] Range one. Range Two [Member] Range Two [Member] Range two. Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] Stock options information Schedule of Share Based Compensation Shares Authorized Under Stock Option Plans By Exercise Price Range [Abstract] Schedule of share based compensation shares authorized under stock option plans by exercise price range. Range of exercise price lower limit Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit Range of exercise price upper limit Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit Stock options outstanding, option outstanding Stock options outstanding weighted average exercise price Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price Stock options outstanding weighted average remaining contractual life Stock options exercisable option outstanding Stock options exercisable weighted average exercise price Stock options exercisable weighted average remaining contractual life Computation of basic and diluted earnings per share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of antidilutive securities excluded from computation of diluted earnings per share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Intellectual Property [Member] Intellectual Property [Member] Customer based [Member] Trade Names [Member] Trade Names [Member] Indefinite-lived Intangible Assets by Major Class [Axis] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] Trade Names [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Carrying value of other intangible assets Intangible Assets, Net (Excluding Goodwill) [Abstract] Useful life of intangible assets Gross carrying amount Finite-Lived Intangible Assets, Gross Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Indefinite-lived trade names Indefinite-Lived Trade Names Intangible assets, gross, excluding Goodwill Intangible Assets, Gross (Excluding Goodwill) Accumulated amortization - Intangible assets, excluding Goodwill Intangible Assets Accumulated Amortization Excluding Goodwill Intangible assets accumulated amortization excluding goodwill. Intangible assets, net, excluding Goodwill Income Statement [Abstract] Cost of revenues Cost of Services Gross profit Selling, general and administrative expenses Selling, General and Administrative Expense Operating income Other income (expense): Other Nonoperating Income (Expense) [Abstract] Interest expense Interest Expense Interest income Investment Income, Interest Other Other Nonoperating Income (Expense) Income before income tax expense Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Provision for federal, state and foreign income taxes Net income Less: Net income attributable to noncontrolling interest Net Income (Loss) Attributable to Noncontrolling Interest Net income attributable to Matrix Service Company Weighted average common shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic (in shares) Diluted (in shares) Quarterly Financial Data (Unaudited) Quarterly Financial Information [Text Block] S.M. Electric Company [Member] S.M. Electric Company [Member] S.M. Electric Company [Member] SME [Member] SME [Member] SME. Record amount of claims Business Combination Claim Settlement Receivables Business combination claim settlement receivables. Contracts Receivable, Claims and Uncertain Amounts, Expected to be Collected in Next Rolling Twelve Months Contracts Receivable, Claims and Uncertain Amounts, Expected to be Collected in Next Rolling Twelve Months Provision for Loss on Contracts Loss on Contracts Accounts receivable, allowances Allowance for Doubtful Accounts Receivable, Current Common stock, par value Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued Treasury stock, shares Treasury Stock, Shares Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Foreign currency translation adjustments (net of tax of $116, $190 and $214) Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Less: Comprehensive income attributable to noncontrolling interest Comprehensive (Income) Loss, Net of Tax, Attributable to Noncontrolling Interest Comprehensive income attributable to Matrix Service Company Comprehensive Income (Loss), Net of Tax, Attributable to Parent Availability under senior credit facility Line of Credit Facility [Abstract] Senior credit facility Borrowings outstanding Letters of credit issued Letters Of Credit Issued Letters of credit issued. Availability under the senior credit facility Line of Credit Facility, Remaining Borrowing Capacity Subsequent Events Subsequent Events [Text Block] Valuation and Qualifying Accounts [Abstract] Valuation and Qualifying Accounts Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Earnings per Common Share Earnings Per Share [Text Block] Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Building [Member] Building [Member] Construction Equipment [Member] Equipment [Member] Transportation Equipment [Member] Transportation Equipment [Member] Office Equipment and Software [Member] Furniture and Fixtures [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Depreciable life of office equipment and software Property, Plant and Equipment, Useful Life Summary of Significant Accounting Policies (Textual) [Abstract] Summary Of Significant Accounting Policies (Textual) [Abstract] Summary of significant accounting policies. Restricted cash Restricted Cash and Cash Equivalents Account receivables Contract Receivable Retainage, Due in Next Twelve Months Other assets Contracts Receivable, Claims and Uncertain Amounts, Expected to be Collected after Next Twelve Months Accounts payable Retention Payable Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Gross [Member] Operating Segments [Member] Industrial [Member] Storage Solutions [Member] Oil Gas And Chemical [Member] Electrical Infrastructure [Member] Intersegment Eliminations [Member] Intersegment Eliminations [Member] Unallocated Corporate [Member] Other Segments [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Results of Operations Segment Reporting Information, Profit (Loss) [Abstract] Less: Inter-segment revenues Gross profit Operating income (loss) Segment assets Capital expenditures Valuation and Qualifying Accounts Disclosure [Table] Valuation and Qualifying Accounts Disclosure [Table] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves [Domain] Valuation Allowances and Reserves [Domain] Allowance for Doubtful Accounts [Member] Allowance for Doubtful Accounts [Member] Valuation Allowance of Deferred Tax Assets [Member] Valuation Allowance of Deferred Tax Assets [Member] Valuation and Qualifying Accounts Disclosure [Line Items] Valuation and Qualifying Accounts Disclosure [Line Items] Movement in Valuation Allowances and Reserves [Roll Forward] Movement in Valuation Allowances and Reserves [Roll Forward] Balance at Beginning of Period Valuation Allowances and Reserves, Balance Charged to Costs and Expenses Valuation Allowances and Reserves, Charged to Cost and Expense Charged to Other Accounts Valuation Allowances and Reserves, Charged to Other Accounts Deductions Valuation Allowances and Reserves, Deductions Balance at End of Period Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Stock Options [Member] Employee Stock Option [Member] Nonvested Deferred Shares [Member] Nonvested Deferred Shares [Member] Nonvested Deferred Shares [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded From Computation Of Diluted Earnings Per Share Antidilutive Securities Excluded From Computation Of Diluted Earnings Per Share [Abstract] Antidilutive securities excluded from computation of diluted earnings per share. Total antidilutive securities Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Current assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets Property, plant and equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Other intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Total assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Current liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities Deferred income taxes Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent Noncontrolling interest of consolidated joint venture Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value Net assets acquired Cash acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Net purchase price Business Combination, Consideration Transferred Pro Forma Information: Business Acquisition, Pro Forma Information [Abstract] Revenues Business Acquisition, Pro Forma Revenue Net income attributable to Matrix Service Company Business Acquisition, Pro Forma Net Income (Loss) Basic earnings per common share (in dollars per share) Business Acquisition, Pro Forma Earnings Per Share, Basic Diluted earnings per common share (in dollars per share) Business Acquisition, Pro Forma Earnings Per Share, Diluted Preferred stock shares authorized Preferred Stock, Shares Authorized Preferred stock shares issued Preferred Stock, Shares Issued Preferred stock shares outstanding Preferred Stock, Shares Outstanding Purchase of common stock on stock buyback program Stock Repurchase Program, Number of Shares Authorized to be Repurchased Annual maximum purchases authorized under stock buyback program Stock Repurchase Program, Authorized Amount Common stock shares withheld Shares Paid for Tax Withholding for Share Based Compensation Components of pretax income Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract] Domestic Income (Loss) from Continuing Operations before Income Taxes, Domestic Foreign Income (Loss) from Continuing Operations before Income Taxes, Foreign Significant components of Company's deferred tax assets and liabilities Components of Deferred Tax Assets and Liabilities [Abstract] Deferred tax assets: Components of Deferred Tax Assets [Abstract] Warranty reserve Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Warranty Reserves Bad debt reserve Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts Paid time-off accrual Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Compensated Absences Insurance reserve Deferred Tax Assets Insurance Reserve Deferred tax assets insurance reserve. Legal reserve Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Legal Settlements Net operating loss benefit and credit carryforwards Deferred Tax Assets, Tax Credit Carryforwards Valuation allowance Deferred Tax Assets, Valuation Allowance Accrued compensation and pension Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions Stock compensation expense on nonvested deferred shares Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Accrued losses Deferred Tax Assets Accrued Losses Deferred tax assets accrued losses. Other-net Deferred Tax Assets, Other Total deferred tax assets Deferred Tax Assets, Net of Valuation Allowance Deferred tax liabilities: Components of Deferred Tax Liabilities [Abstract] Tax over book depreciation Deferred Tax Liabilities, Property, Plant and Equipment Tax over book amortization Deferred Tax Liabilities, Goodwill Prepaid insurance Deferred Tax Liabilities, Prepaid Expenses Other-net Deferred Tax Liabilities, Other Total deferred tax liabilities Deferred Tax Liabilities, Gross Net deferred tax asset (liability) Deferred Tax Assets, Net Organization and Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Revenue Recognition Revenue Recognition, Policy [Policy Text Block] Precontract Costs Precontract Costs, Policy [Policy Text Block] Change Orders and Claims Recognition Change Orders And Claims Recognition [Policy Text Block] Disclosure of accounting policy for change orders and the recognition of claims. Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Accounts Receivable Receivables, Policy [Policy Text Block] Retentions Retention Payable [Policy Text Block] Retention payable. Loss Contingencies Commitments and Contingencies, Policy [Policy Text Block] Inventories Inventory, Policy [Policy Text Block] Depreciation Depreciation, Depletion, and Amortization [Policy Text Block] Internal Use Computer Software Internal Use Software, Policy [Policy Text Block] Impairment of Long-Lived Assets Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Goodwill Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Other Intangible Assets Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block] Insurance Reserves Insurance Reserves [Policy Text Block] Disclosure of accounting policy for insurance reserves. Stock-Based Compensation Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Income Taxes Income Tax, Policy [Policy Text Block] Foreign Currency Foreign Currency Transactions and Translations Policy [Policy Text Block] Recently Issued Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block]