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Entity Filer Category Other Other Intangible Assets [Member] Product and Service [Axis] Product and Service [Axis] Total liabilities Liabilities Three months ending June 30, 2020 Debt Covenant Period One [Member] Debt Covenant Period One 2016 Plan Long-Term Incentive Plan 2016 [Member] Long-Term Incentive Plan 2016 Entity Address, City or Town Entity Address, City or Town Weighted-average period over which unrecognized compensation cost is expected to be recognized (years) Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Amount of damages claimed Loss Contingency, Damages Sought, Value Less: Present value discount Lessee, Operating Lease, Liability, Undiscounted Excess Amount Contingent Consideration Liability [Roll Forward] Contingent Consideration Liability [Roll Forward] Contingent Consideration Liability [Roll Forward] Revenue recognized that was included in contract liability balance at the beginning of the year Contract with 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Comprehensive Income (Loss), Net of Tax, Attributable to Parent 2023 Finance Lease, Liability, to be Paid, Year Three Accounts payable Increase (Decrease) in Accounts Payable, Trade Anniversary 4 Share-based Compensation Award, Tranche Four [Member] Share-based Compensation Award, Tranche Four Scenario [Domain] Scenario [Domain] Asia-Pacific Asia Pacific [Member] Purchase of property, plant and equipment Payments to Acquire Property, Plant, and Equipment Consolidation Items [Domain] Consolidation Items [Domain] Entity Tax Identification Number Entity Tax Identification Number Long-Term Debt Long-term Debt [Text Block] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Fair value of contingent consideration Beginning balance Ending balance Business Combination, Contingent Consideration, Liability Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Non-employee Directors Director [Member] Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] Performance condition adjustments (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Adjustments in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Adjustments in Period, Weighted Average Grant Date Fair Value Net income (loss) Net loss Net loss Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Schedule of Disaggregated Revenues by Industry and Key Geographic Location Disaggregation of Revenue [Table Text Block] Income (loss) before provision (benefit) for income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Trading Symbol Trading Symbol Nine months ending December 31, 2020 Debt Covenant Period Three [Member] Debt Covenant Period Three Cumulative goodwill impairment Goodwill, Impaired, Accumulated Impairment Loss Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Impairment of ROU assets Operating Lease, Impairment Loss Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Share-based compensation expense Share-based Payment Arrangement, Noncash Expense Legal Entity [Axis] Legal Entity [Axis] Taxes paid related to net share settlement of share-based awards Payment, Tax Withholding, Share-based Payment Arrangement Intangible Assets, Net (Excluding Goodwill) [Abstract] Intangible Assets, Net (Excluding Goodwill) [Abstract] Term of agreement to purchase products from the buyer on sale of subsidiary Long-term Purchase Commitment, Period Goodwill acquired during the period Goodwill, Acquired During Period Entity [Domain] Entity [Domain] Intangible Assets Intangible Assets Disclosure [Text Block] Useful Life (Years) Property, Plant and Equipment, Useful Life 2009 Plan Long Term Incentive Plan 2009 [Member] Represents information pertaining to 2009 Long-Term Incentive Plan, which becomes effective upon the closing of the IPO. 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Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle, if longer). Land Land [Member] Property, plant and equipment, net Property, plant and equipment, net Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Right-of-use liability - operating ROU - current Operating Lease, Liability, Current Unrecognized compensation cost, net of estimated forfeitures Unrecognized compensation cost Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Europe Europe [Member] Finance leases Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Less: Net income (loss) attributable to non-controlling interests, net of taxes Net Income (Loss) Attributable to Noncontrolling Interest Schedule of Changes in Fair Value of Level 3 Contingent Consideration Fair Value, Liabilities Measured on Recurring Basis [Table Text Block] Current net assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets Forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Foreign Subsidiaries Disposal Of Foreign Subsidiaries [Member] Disposal Of Foreign Subsidiaries [Member] United States UNITED STATES Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Fair Value Measurements Fair Value Disclosures [Text Block] Schedule of Company's Outstanding, Nonvested Restricted Share Units and Performance Restricted Stock Units Share-based Payment Arrangement, Outstanding Award, Activity, Excluding Option [Table Text Block] Schedule of Stock Option Activity Share-based Payment Arrangement, Option, Activity [Table Text Block] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Other Process Industries Other Process Industries [Member] Other Process Industries Customer [Domain] Customer [Domain] Unusual or Infrequent Item, or Both [Axis] Unusual or Infrequent Item, or Both [Axis] Accrued expenses and other liabilities Increase (Decrease) in Other Accrued Liabilities and Deferred Liabilities The increase (decrease) during the reporting period in other expenses incurred but not yet paid and the change during the period in carrying value for all deferred liabilities due within one year or operating cycle. Subsequent Event Type [Domain] Subsequent Event Type [Domain] Business Acquisition [Line Items] Business Acquisition [Line Items] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Operating leases Operating Lease, Weighted Average Discount Rate, Percent Purchase of intangible assets Payments to Acquire Intangible Assets and Software The cash outflow to acquire assets without physical form usually arising from contractual or other legal rights, excluding goodwill. In addition, the cash outflow associated with the development, modification or acquisition of software programs or applications for internal use (that is, not to be sold, leased or otherwise marketed to others) that qualify for capitalization. Impairment charges Asset Impairment Charges Proceeds from sale of equipment Proceeds from Sale of Property, Plant, and Equipment Debt issuance costs Debt Issuance Costs, Net Accrued Expenses and Other Current Liabilities Accrued Liabilities Deferred Revenues and Contingent Consideration Liabilities Current Disclosure [Text Block] The entire disclosure for accrued liabilities, deferred revenues, and the fair value of contingent consideration liabilities at the end of the reporting period. Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Adjustments to fair value of contingent consideration liabilities Revaluation Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Less: Present value discount Finance Lease, Liability, Undiscounted Excess Amount Consolidation Items [Axis] Consolidation Items [Axis] Goodwill impairment charge Impairment charges Goodwill, Impairment Loss Total Lessee, Operating Lease, Liability, to be Paid Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Corp/Elim Corporate and eliminations Corporate And Eliminations [Member] Corporate And Eliminations International International International [Member] Represents International, a business segment of the entity. Disposal Group, Disposed of by Sale, Not Discontinued Operations Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] Goodwill Balance at December 31, 2019 Balance at June 30, 2020 Goodwill Various Pipeline Projects For Texas Customer Various Pipeline Projects For Texas Customer [Member] Various Pipeline Projects For Texas Customer Executive and Senior Officers Executive and Senior Officers [Member] Represents information pertaining to the executives and senior officers of the reporting entity. Title of Individual [Axis] Title of Individual [Axis] Contingent consideration, current portion Business Combination, Contingent Consideration, Liability, Current Operating Lease Arrangement Operating Lease Arrangement [Member] Operating Lease Arrangement Numerator: Net Income (Loss) Attributable to Parent [Abstract] Income taxes payable Increase (Decrease) in Income Taxes Payable Pension accrual Multiemployer Plans, Withdrawal Obligation Consideration received on sale of subsidiary Disposal Group, Including Discontinued Operation, Consideration Buildings and improvements Building and Building Improvements [Member] Other assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Assets Liabilities: Liabilities, Fair Value Disclosure [Abstract] Schedule of Changes in Carrying Amount of Goodwill Schedule of Goodwill [Table Text Block] Vesting [Axis] Vesting [Axis] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Noncash investing and financing Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Entity Central Index Key Entity Central Index Key Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] Deferred revenue Contract with Customer, Liability, Current Entity Emerging Growth Company Entity Emerging Growth Company Subsequent Event [Line Items] Subsequent Event [Line Items] Granted (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Number of welds inspected (over) Loss Contingency, Number Of Welds Inspected Loss Contingency, Number Of Welds Inspected Diluted (in shares) Weighted average common shares outstanding, diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Litigation Case [Domain] Litigation Case [Domain] Number of operating segments Number of Operating Segments European Reporting Unit European Reporting Unit [Member] European Reporting Unit Debt Disclosure [Abstract] Debt Disclosure [Abstract] Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Operating leases Operating Lease, Weighted Average Remaining Lease Term Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Recovery from bad debt provision Accounts Receivable, Allowance for Credit Loss, Recovery Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Restructuring Plan [Axis] Restructuring Plan [Axis] Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Repayment of long-term debt Repayments of Long-term Debt Recognized share-based compensation expense Recognized share-based compensation expense (benefit) Share-based Payment Arrangement, Expense Accrued expenses and other current liabilities Total Accrued Expenses And Other Liabilities, Current Accrued Expenses And Other Liabilities, Current Common stock, $0.01 par value, 200,000,000 shares authorized, 29,110,362 and 28,945,472 shares issued Common Stock, Value, Issued Disposal Group Name [Axis] Disposal Group Name [Axis] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Compensation liability (less than) Deferred Compensation Share-based Arrangements, Liability, Current and Noncurrent Impairment of intangibles Impairment of Intangible Assets, Finite-lived Quarter ending March 31, 2021 Debt Covenant Period Seven [Member] Debt Covenant Period Seven Current portion of long-term debt Less: Current portion Long-term Debt, Current Maturities Schedule of Accounts Receivable, Net Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] 2024 Finance Lease, Liability, to be Paid, Year Four Weighted-average discount rate Weighted Average Discount Rate, Percent [Abstract] Weighted Average Discount Rate, Percent Related Party Transaction [Axis] Related Party Transaction [Axis] Subsequent Event [Table] Subsequent Event [Table] Share-base payments (in shares) Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Non-controlling interests Stockholders' Equity Attributable to Noncontrolling Interest Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Award vesting rights, percentage Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Common stock, shares issued (in shares) Common Stock, Shares, Issued Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Percentage of reduction of rental payments Operating Lease, Percentage Of Reduction Of Rental Payments Operating Lease, Percentage Of Reduction Of Rental Payments Aerospace & Defense Aerospace and Defense [Member] Aerospace and Defense Temporary employment contract period Temporary Staff Leasing Contract Period Temporary Staff Leasing Contract Period Total ROU liabilities ROU operating lease liabilities Lease liability Operating Lease, Liability Long-term debt, net of current portion Long-term Debt, Excluding Current Maturities Segment Reporting [Abstract] Segment Reporting [Abstract] Accounts receivable Increase (Decrease) in Accounts Receivable Debt Instrument [Line Items] Debt Instrument [Line Items] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Total Mistras Group, Inc. stockholders’ equity Stockholders' Equity Attributable to Parent Total consideration Business Combination, Consideration Transferred Funded debt leverage ratio for acquisitions Debt Instrument, Covenant Temporarily Increase in Funded Debt Leverage Ratio due to Business Acquisitions Debt Instrument, Covenant Temporarily Increase in Funded Debt Leverage Ratio due to Business Acquisitions Total liabilities and equity Liabilities and Equity Litigation Loss Contingencies [Line Items] Number of acquisitions Number of Businesses Acquired Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Payments Business Combination, Contingent Consideration Arrangements, Payments Business Combination, Contingent Consideration Arrangements, Payments Depreciation Cost, Depreciation Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Restricted Stock Unit Awards Restricted Stock Units (RSUs) [Member] Performance period (years) Share Based Compensation Arrangement by Share Based Payment Award, Award Performance Period Represents the performance period of the entity, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Operating lease expense Operating Lease, Cost Revenue, practical expedient, incremental cost of obtaining a contract, maximum period Revenue, Practical Expedient, Incremental Cost of Obtaining Contract, Maximum Period Revenue, Practical Expedient, Incremental Cost of Obtaining Contract, Maximum Period Total Mistras Group, Inc. Stockholders’ Equity Parent [Member] Debt Covenant Period [Domain] Debt Covenant Period [Domain] [Domain] for Debt Covenant Period [Axis] Number or welds not in compliance Loss Contingency, Number Of Welds Alleged Not In Compliance Loss Contingency, Number Of Welds Alleged Not In Compliance Potential common stock excluded from computation of diluted earnings per share due to net loss for the period (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Finance leases Finance Lease, Weighted Average Remaining Lease Term Other Other Noncash Income (Expense) Short-term lease expense Short-term Lease, Cost Useful Life (Years) Finite-Lived Intangible Asset, Useful Life Equity Component [Domain] Equity Component [Domain] Liabilities Liabilities [Abstract] Entity Address, Address Line One Entity Address, Address Line One Gross profit Gross profit Gross Profit Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Share-Based Compensation Share-based Payment Arrangement [Text Block] Net income (loss) attributable to Mistras Group, Inc. Net income (loss) attributable to Mistras Group, Inc. Net Income (Loss) Attributable to Parent Entity Address, State or Province Entity Address, State or Province Obligations under finance leases, net of current portion Finance Lease, Liability, Noncurrent Changes in operating assets and liabilities, net of effect of acquisitions and dispositions Increase (Decrease) in Operating Capital [Abstract] Remainder of 2020 Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year LIBOR London Interbank Offered Rate (LIBOR) [Member] Other comprehensive income, net of tax Other Comprehensive Income (Loss), Net of Tax Funded debt leverage ratio Debt Instrument, Covenant Funded Debt Leverage Ratio for Additional Interest Payment Represents the Funded Debt Leverage Ratio on which the entity will bear an additional interest on debt. Leases [Abstract] Leases [Abstract] Description of Business and Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Total current assets Assets, Current Goodwill Goodwill Disclosure [Text Block] Less: comprehensive income (loss) attributable to non-controlling interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Earnings (loss) per common share: Earnings Per Share [Abstract] Lease liability Finance Lease, Liability Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Property, plant and equipment, gross Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization Amount deducted from aggregate cash and cash equivalents held by company and it's subsidiaries if prepayment of credit facility is required Debt Instrument, Covenant, Amount Deducted From Aggregate Cash and Cash Equivalents Held By Company and Subsidiaries If Prepayment of Credit Facility is Required Debt Instrument, Covenant, Amount Deducted From Aggregate Cash and Cash Equivalents Held By Company and Subsidiaries If Prepayment of Credit Facility is Required Disposal Group Name [Domain] Disposal Group Name [Domain] Entity Interactive Data Current Entity Interactive Data Current Common Stock Options Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Accumulated depreciation and amortization Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, Accumulated Depreciation and Amortization Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Supplemental disclosure of cash paid Supplemental Cash Flow Information [Abstract] Corporate general partner, ownership percentage Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Joint Venture Corporate Joint Venture [Member] Common Stock Common Stock [Member] Property, Plant and Equipment, net Property, Plant and Equipment [Line Items] Oil & Gas Oil & Gas [Member] Oil & Gas Product and Service [Domain] Product and Service [Domain] Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Schedule of Acquisition-related Expenses Schedule of Business Combination Acquisition Related Costs [Table Text Block] Tabular disclosure of acquisition-related costs. Finance leases Finance Lease, Weighted Average Discount Rate, Percent Schedule of Property, Plant and Equipment, Net Property, Plant and Equipment [Table Text Block] Number of non-employee directors to whom fully vested common stock is granted Share Based Compensation Arrangement by Share Based Payment Award, Number of Non Employee Directors to whom Award is Granted Represents the number of non-employee directors to whom fully vested common stock is granted. Gross Amount Finite-Lived Intangible Assets, Gross Potential acquisition-related contingent consideration, low end of range Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low Unusual or Infrequent Item, or Both [Domain] Unusual or Infrequent Item, or Both [Domain] Cash paid for amounts included in the measurement of lease liabilities for finance leases Cash Flow, Lessee [Abstract] Cash Flow, Lessee Interest rate Debt Instrument, Interest Rate, Stated Percentage Quarterly payment reduction to non-employee directors Restructuring and Related Cost, Reduction In Quarterly Payment To Non-employee Directors Restructuring and Related Cost, Reduction In Quarterly Payment To Non-employee Directors Equipment acquired through finance lease obligations Lease Obligation Incurred Revenue, remaining performance obligation, expected timing of satisfaction period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Acquisition-related expense (benefit), net Acquisition-related expense, net Acquisition Related Costs and Fair Value Adjustments to Initial Purchase Price Allocation This element represents acquisition-related costs incurred in connection with business combinations which costs have been expensed during the period. This also includes adjustments to the fair value of the initial purchase price allocation for acquisitions including, but not limited to, changes in contingent consideration liabilities and other liabilities, accounts receivable, inventory, fixed assets, other assets, and other acquisition-related intangible assets. Acquisition-related costs also include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. Bad debt provision for troubled customers, net of recoveries Provision (reversal) of allowance for doubtful accounts receivables Accounts Receivable, Credit Loss Expense (Reversal) Unbilled revenues accrued Contract with Customer, Asset, after Allowance for Credit Loss, Current Diluted earnings (loss) per share: Earnings Per Share, Diluted [Abstract] Exercise of stock options (in shares) Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Net change in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Acquisitions and Dispositions Business Combination Disclosure [Text Block] ROU finance lease assets Finance Lease, Right-of-Use Asset, after Accumulated Amortization Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Schedule of Maturities of Operating Lease Liabilities Lessee, Operating Lease, Liability, Maturity [Table Text Block] Schedule of Accrued Expenses and Other Current Liabilities Schedule of Accrued Liabilities Deferred Revenue and Contingent Consideration Liabilities Current [Table Text Block] Tabular disclosure of (a) other payables; (b) accrued liabilities; (c) deferred revenue; and (d) the fair value of contingent consideration liabilities, due within one year or within the normal operating cycle if longer. Stock Options Share-based Payment Arrangement, Option [Member] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Debt covenant, minimum EBITDA, amount Debt Instrument, Covenant, Minimum EBITDA, Amount Debt Instrument, Covenant, Minimum EBITDA, Amount Basic (in shares) Weighted-average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Margin percentage Debt Instrument, Basis Spread on Variable Rate Ownership [Axis] Ownership [Axis] Subsequent Events [Abstract] Subsequent Events [Abstract] Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Ownership [Domain] Ownership [Domain] Loss Contingencies [Table] Loss Contingencies [Table] Plan Name [Domain] Plan Name [Domain] Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Excluding Portion Of Comprehensive Income Attributable to Noncontrolling Interest Comprehensive Income (Loss), Net of Tax, Excluding Portion Of Comprehensive Income Attributable to Noncontrolling Interest Maximum amount available for the issuance of letters of credit Line of Credit Facility Maximum Borrowing Capacity Available for Issuance of Letters of Credit Represents the maximum amount of borrowing capacity under the revolving credit facility that is available for the issuance of letters of credit. Revenue Revenue from Contract with Customer [Text Block] Interest Interest Paid, Excluding Capitalized Interest, Operating Activities Pro forma funded debt leverage ratio Debt Instrument, Covenant, Pro Forma Funded Debt Leverage Ratio due to Business Acquisitions Debt Instrument, Covenant, Pro Forma Funded Debt Leverage Ratio due to Business Acquisitions Number of consecutive business days Debt Covenant, Number Of Consecutive Business Days Debt Covenant, Number Of Consecutive Business Days Total equity Beginning balance Ending balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Operating leases Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Remainder of 2020 Finance Lease, Liability, to be Paid, Remainder of Fiscal Year Additional paid-in capital Additional Paid in Capital Provision (benefit) for income taxes Income Tax Expense (Benefit) Income taxes, net of refunds Income Taxes Paid, Net Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Title of Individual [Domain] Title of Individual [Domain] Current portion of finance lease obligations Finance Lease, Liability, Current Aggregate consideration paid Cash paid Payments to Acquire Businesses, Gross Anniversary 1 Share-based Payment Arrangement, Tranche One [Member] Business Combination, Consideration Transferred [Abstract] Business Combination, Consideration Transferred [Abstract] Schedule of Long-term Debt Schedule of Long-term Debt Instruments [Table Text Block] Depreciation and amortization expense Depreciation Covenants not to compete Noncompete Agreements [Member] Related Party Transaction [Domain] Related Party Transaction [Domain] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Foreign currency translation Business Combination, Contingent Consideration Arrangements, Contingent Consideration, Foreign Currency Translation Adjustments Business Combination, Contingent Consideration Arrangements, Contingent Consideration, Foreign Currency Translation Adjustments Accrued salaries, wages and related employee benefits Accrued Salaries Wages and Employee Related Benefits Current Carrying value as of the balance sheet date of the obligations incurred through that date and payable for salaries, wages, and related employee benefit. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle, if longer). Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Contingent consideration, maximum amount Potential acquisition-related contingent consideration, high end of range Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High Contingency charges Loss Contingency, Loss in Period Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Award Type [Axis] Award Type [Axis] Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Fair value adjustments to contingent consideration Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Liabilities Capitalized debt issuance costs expensed Amortization of Debt Issuance Costs Renewable Energy Industry Customer Renewable Energy Industry Customer [Member] Renewable Energy Industry Customer Fair value of awards vested Grant date fair value of awards issued Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Maximum Maximum [Member] Security Exchange Name Security Exchange Name Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Noncontrolling Interest Noncontrolling Interest [Member] Retained earnings (deficit) Retained Earnings [Member] Deferred income taxes Deferred Income Tax Noncash Expense (Benefit) The noncash component of income tax expense for the period representing the increase (decrease) in the entity's deferred tax assets and liabilities pertaining to continuing operations. Fair value measurements Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Effective income tax rate Effective Income Tax Rate Reconciliation, Percent Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Credit Agreement Credit Agreement [Member] Credit Agreement Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Domain] Award Type [Domain] Document Transition Report Document Transition Report Cash and cash equivalents if prepayment of facility is required Debt Instrument, Covenant, Prepayment of Outstanding Credit Facility Required if Cash and Cash Equivalents Exceeds, Amount Debt Instrument, Covenant, Prepayment of Outstanding Credit Facility Required if Cash and Cash Equivalents Exceeds, Amount Disposal Group Classification [Domain] Disposal Group Classification [Domain] Property, Plant and Equipment, net Property, Plant and Equipment Disclosure [Text Block] Earnings (loss) per Share Earnings Per Share [Text Block] Current Liabilities Liabilities, Current [Abstract] Cash flows from financing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Financial information by segment Segment Reporting Information [Line Items] Acquisition that Provides Pipeline Integrity Management Software Acquiree That Provides Pipeline Integrity Management Software [Member] Acquiree That Provides Pipeline Integrity Management Software 2022 Finance Lease, Liability, to be Paid, Year Two Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Proceeds from revolver Proceeds from Lines of Credit Maximum borrowing capacity in non-U.S. Dollar currencies Line of Credit Facility Maximum Borrowing Capacity in Non US Currencies Represents the maximum borrowing capacity in non-U.S. dollar currencies under the revolving credit facility. Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Basic earnings (loss) per share: Earnings Per Share, Basic [Abstract]