Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Non-Current Other Assets Other Noncurrent Assets [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2015-03 Accounting Standards Update 2015-03 [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Incremental Facility, Minimum Incremental Facility, Minimum [Member] Incremental Facility, Minimum - minimum capacity for additional revolver facility Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Credit Agreement - Revolving facility (matures April 2020) Revolving Credit Facility [Member] Credit Agreement - Term Loan (matures April 2020) Senior Loans [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] 0.75% Convertible Senior Notes Due 2021 0.75% Convertible Senior Notes Due 2021 [Member] 0.75% Convertible Senior Notes Due 2021 [Member] 7.125% Senior Subordinated Notes Due 2021 Seven Point One Two Five Percent Senior Subordinated Notes Due 2021 [Member] 7.125% Senior Subordinated Notes Due 2021 [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Debt Instrument, Face Amount Debt Instrument, Face Amount Debt, interest rate (in percent) Debt Instrument, Interest Rate, Stated Percentage Debt and capital lease obligations Debt and Capital Lease Obligations Long-term debt premium on 7.125% senior subordinated notes Debt Instrument, Unamortized Premium Less: current portion Long-term Debt and Capital Lease Obligations, Current Long-term debt Long-term Debt, Excluding Current Maturities Debt Issuance Costs, Net Debt Issuance Costs, Net Commitments and Contingencies Disclosure [Abstract] Loss Contingencies [Table] Loss Contingencies [Table] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Domain] Performance Guarantee and Surety Bond Performance Guarantee and Surety Bond [Member] Performance guarantee and surety bond Standby Letters of Credit Standby Letters of Credit [Member] Loss Contingencies [Line Items] Long-term Purchase Commitment [Line Items] Outstanding performance and other surety contract bonds Guarantor Obligations, Current Carrying Value Letters of credit outstanding amount Letters of Credit Outstanding, Amount Goodwill and Intangible Assets Disclosure [Abstract] Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Table] Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Table] Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Table] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Maximum Maximum [Member] Minimum Minimum [Member] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] Goodwill and Other Indefinite-Lived Intangible Assets Goodwill and Other Indefinite-Lived Intangible Assets [Member] Goodwill and Other Indefinite-Lived Intangible Assets Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] TelCom Construction, Inc. TelCom Construction, Inc. [Member] TelCom Construction, Inc. [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 relationships Customer Relationships [Member] Trade names Trade Names [Member] Non-compete agreements Noncompete Agreements [Member] Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] Finite-Lived and Indefinite-Lived Intangible Assets Fair Value Inputs, Long-term Revenue Growth Rate Fair Value Inputs, Long-term Revenue Growth Rate Goodwill Goodwill Carrying amount Finite-Lived Intangible Assets, Gross Amortization expense for finite-lived intangible assets Amortization of Intangible Assets Fair Value Inputs, Discount Rate Fair Value Inputs, Discount Rate Percentage change in fair value input Percentage Change in Fair Value Input Percentage Change in Fair Value Input Fair Value Assumptions, Expected Term Fair Value Assumptions, Expected Term Change in fair value, percentage Change In Fair Value, Percentage Change In Fair Value, Percentage Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Stock-Based Awards Disclosure of Compensation Related Costs, Share-based Payments [Text Block] 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] Award Date [Axis] Award Date [Axis] Award Date [Domain] Award Date [Domain] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options Stock-based compensation Share-based Compensation Tax benefit recognized in the statement of operations Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Earnings Per Share [Abstract] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Convertible Note Hedge Convertible Note Hedge [Member] Convertible Note Hedge [Member] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Stock-based awards Stock Compensation Plan [Member] Convertible senior notes Convertible Debt Securities [Member] Warrants Note Warrant [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Debt Instrument, Convertible, Conversion Price Debt Instrument, Convertible, Conversion Price Class of Warrant or Right, Exercise Price of Warrants or Rights Class of Warrant or Right, Exercise Price of Warrants or Rights Basic earnings per unit Earnings Per Share, Basic [Abstract] Net income Net Income (Loss) Attributable to Parent Weighted-average number of common shares (in shares) Weighted Average Number of Shares Outstanding, Basic Basic earnings per common share (in dollars per share) Earnings Per Share, Basic Diluted earnings per unit Earnings Per Share, Diluted [Abstract] Potential common stock arising from stock options, and unvested restricted share units (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Total shares-diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Diluted earnings per common share (in dollars per share) Earnings Per Share, Diluted Anti-dilutive weighted shares excluded from the calculation of earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Derivative, Number of Instruments Held Derivative, Number of Instruments Held Payments for Hedge, Financing Activities Payments for Hedge, Financing Activities Class of Warrant or Right, Number of Securities Called by Warrants or Rights Class of Warrant or Right, Number of Securities Called by Warrants or Rights Proceeds from sale of warrants Proceeds from Issuance of Warrants Deferred Tax Liabilities, Derivatives Deferred Tax Liabilities, Derivatives Deferred Tax Assets, Derivative Instruments Deferred Tax Assets, Derivative Instruments Stockholders' Equity Note [Abstract] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Retained Earnings Retained Earnings [Member] Class of Stock [Line Items] Class of Stock [Line Items] Number of shares repurchased Stock Repurchased and Retired During Period, Shares Total Consideration (Dollars in thousands) Payments for Repurchase of Common Stock Average Price Per Share (in dollars per share) Average Price Per Share Repurchase of Common Stock The total costs of shares repurchased during the period divided by the total number of shares that have been repurchased during the period which have not been retired and are not held in treasury. Stock repurchased and retired during period, value Stock Repurchased and Retired During Period, Value Remaining authorized repurchase amount Stock Repurchase Program, Remaining Authorized Repurchase Amount Shares paid for tax withholding for share based compensation Shares Paid for Tax Withholding for Share Based Compensation Value of shares paid for tax withholding for share based compensation Value of Shares Paid for Tax Withholding for Share Based Compensation For net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the monetary value of shares the employees use to repay the employer. Income Tax Disclosure [Abstract] Operating Loss Carryforwards, Expiration Date Operating Loss Carryforwards, Expiration Date Income taxes receivable Income Taxes Receivable Income taxes payable Taxes Payable, Current Payment of interest and penalties accrued Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Current Taxes Current Federal, State and Local, Tax Expense (Benefit) [Abstract] Federal Current Federal Tax Expense (Benefit) Foreign Current Foreign Tax Expense (Benefit) State Current State and Local Tax Expense (Benefit) Current Current Income Tax Expense (Benefit) Deferred Taxes Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Deferred Federal Income Tax Expense (Benefit) Foreign Deferred Foreign Income Tax Expense (Benefit) State Deferred State and Local Income Tax Expense (Benefit) Deferred Deferred Income Tax Expense (Benefit) Total provision for income taxes Income Tax Expense (Benefit) Deferred Tax Assets Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals [Abstract] Insurance and other reserves Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Reserves Allowance for doubtful accounts and reserves Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts Net operating loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards Stock-based compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Other Deferred Tax Assets, Other Total deferred tax assets Deferred Tax Assets, Gross Valuation allowance Deferred Tax Assets, Valuation Allowance Deferred tax assets, net of valuation allowance Deferred Tax Assets, Net of Valuation Allowance Deferred Tax Liabilities Deferred Tax Liabilities, Gross [Abstract] Property and equipment Deferred Tax Liabilities, Property, Plant and Equipment Goodwill and intangibles Deferred Tax Liabilities, Goodwill and Intangible Assets Other Deferred Tax Liabilities, Other Deferred tax liabilities Deferred Tax Liabilities, Gross Deferred Tax Liabilities, Net Deferred Tax Liabilities, Net Compensation and Retirement Disclosure [Abstract] Defined Contribution Plan [Table] Defined Contribution Plan [Table] Defined Contribution Plan Name [Axis] Defined Contribution Plan Name [Axis] Defined Contribution Plan Name [Domain] Defined Contribution Plan Name [Domain] Acquired Businesses Obligations Assumed Acquired Businesses Obligations Assumed [Member] Acquired Businesses Obligations Assumed [Member] Collective Bargaining Arrangement [Axis] Collective Bargaining Arrangement [Axis] Collective Bargaining Arrangement [Domain] Collective Bargaining Arrangement [Domain] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] Defined Contribution Plan Disclosure [Line Items] Defined Contribution Plan Disclosure [Line Items] Defined Contribution Plan, Employer Matching Contribution, Percent of Match Defined Contribution Plan, Employer Matching Contribution, Percent of Match Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay Pension and Other Postretirement Benefit Expense Pension and Other Postretirement Benefit Expense Accrued Insurance Claims [Abstract] Statement [Table] Statement [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Scenario, Forecast Scenario, Forecast [Member] Other Current Assets Other Current Assets [Member] Accrued Insurance Claims [Line Items] Accrued Insurance Claims [Line Items] Accrued Insurance Claims [Line Items] Retained risk of loss, general liability and workers' compensation, maximum automobile liability Automobile Insurance Liability, General Liability and Workers' Compensation The maximum retained risk of loss per occurrence for automobile liability. Number of States with State-Sponsored Insurance Fund Number of States with State-Sponsored Insurance Fund Number of States with State-Sponsored Insurance Fund Aggregate stop loss coverage for automobile liability, general liability, and workers' compensation claims before adjustment Aggregate Stop Loss Coverage for Automobile Liability, General Liability, and Workers' Compensation Claims Before Adjustment Increase Aggregate Stop Loss Coverage for Automobile Liability, General Liability, and Workers' Compensation Claims Before Adjustment Increase Insurance liability, annual retained risk loss Insurance Liability, Annual Retained Risk of Loss, Under Employee Health Plan Per Participant Annual retained risk of loss under the employee health plan. Accrued Insurance Accrued Insurance Accrued insurance claims, Noncurrent Accrued Insurance, Claims, Noncurrent Carrying value as of the balance sheet date of obligations incurred through that date and payable to insurance entities and/or claimants to mitigate potential losses from auto liability, general liability, workers compensation, employee group health, and damage claims. Used to reflect the Noncurrent portion of the liabilities. Insurance recoveries/receivables related to accrued claims Insurance Settlements Receivable Schedule of Share Repurchases Under Current and Previously Authorized Share Repurchase Programs Schedule of Share Repurchases, Current and Prior Share Repurchase Authorizations [Table Text Block] Tabular disclosure of share repurchases under the current and prior share repurchase authorizations. Schedule of Unrecognized Tax Benefits Roll Forward Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] Schedule of Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Schedule of Components of Income Tax Expense (Benefit) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of Effective Income Tax Rate Reconciliation Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Risks and Uncertainties [Abstract] Concentration of Credit Risk Concentration Risk Disclosure [Text Block] Statement of Cash Flows [Abstract] Statement [Line Items] Statement [Line Items] Income Statement [Abstract] REVENUES: Revenue, Net [Abstract] Contract revenues Sales Revenue, Services, Net EXPENSES: Operating Expenses [Abstract] Costs of earned revenues, excluding depreciation and amortization Cost of Services, Excluding Depreciation, Depletion, and Amortization General and administrative (including stock-based compensation expense of $16.8 million, $13.9 million, and $12.6 million respectively) General and Administrative Expense Depreciation and amortization Depreciation, Depletion and Amortization Total Costs and Expenses Interest expense, net Interest Income (Expense), Net Loss on debt extinguishment Gain (Loss) on Extinguishment of Debt Other income, net Other Nonoperating Income (Expense) Income before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Provision for income taxes: Income Tax Expense (Benefit), Continuing Operations [Abstract] Current Deferred Net income Earnings per common share: Shares used in computing earnings per common share: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic (in shares) Diluted (in shares) Line of Credit Facility [Table] Line of Credit Facility [Table] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Debt Instrument, Interest Rate at Period End Debt Instrument, Interest Rate, Effective Percentage Unutilized commitment fee (in percent) Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Payables and Accruals [Abstract] Schedule of Other Accrued Liabilities Schedule of Accrued Liabilities [Table Text Block] Quarterly Financial Data [Abstract] Quarterly Financial Information Quarterly Financial Information [Text Block] Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Amount Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Amount Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount Unrecognized Tax Benefits, Beginning Balance Unrecognized Tax Benefits Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Unrecognized Tax Benefits, Ending Balance Accounting Policies [Abstract] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Segment Information Segment Reporting, Policy [Policy Text Block] Accounting Period Fiscal Period, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Revenue Recognition, Policy Revenue Recognition, Policy [Policy Text Block] Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Receivables, Trade and Other Accounts Receivable, Allowance for Doubtful Accounts, Policy Receivables, Trade and Other Accounts Receivable, Allowance for Doubtful Accounts, Policy [Policy Text Block] Inventory, Policy Inventory, Policy [Policy Text Block] Property, Plant and Equipment, Policy Property, Plant and Equipment, Policy [Policy Text Block] Goodwill and Intangible Assets, Policy Goodwill and Intangible Assets, Policy [Policy Text Block] Business Combinations Business Combinations Policy [Policy Text Block] Impairment or Disposal of Long-Lived Assets, Policy Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Accrued Insurance Claims Self Insurance Reserve [Policy Text Block] Earnings Per Share, Policy Earnings Per Share, Policy [Policy Text Block] Share-based Compensation, Option and Incentive Plans Policy Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Income Tax, Policy Income Tax, Policy [Policy Text Block] Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Taxes Collected From Customers And Remitted To Governmental Authorities Taxes Collected From Customers And Remitted To Governmental Authorities [Policy Text Block] Accounting policy for taxes collected from customers and remitted to governmental authorities. Other Assets Other Assets, Policy [Policy Text Block] Other Assets, Policy [Policy Text Block] Recently Issued Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Receivables [Abstract] Accounts Receivable Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Schedule that Represents A Significant Portion of the Company’s Customer Base and Each Over 10% of Total Revenue Schedules of Concentration of Risk, by Risk Factor [Table Text Block] Statement of Financial Position [Abstract] Long-term debt premium Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, authorized (in shares) Preferred Stock, Shares Authorized Preferred stock, issued (in shares) Preferred Stock, Shares Issued Preferred stock, outstanding (in shares) Preferred Stock, Shares Outstanding Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, authorized (in shares) Common Stock, Shares Authorized Common stock, issued (in shares) Common Stock, Shares, Issued Common Stock, Shares, Outstanding Common Stock, Shares, Outstanding Capital Stock Capital Stock [Text Block] The entire disclosure of share repurchases under the current and prior share repurchase authorizations. Other Income and Expenses [Abstract] Other Income, Net Other Income and Other Expense Disclosure [Text Block] Other Accrued Liabilities Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] Eurodollar Eurodollar [Member] Administrative Agent Base Rate Administrative Agent Base Rate [Member] Administrative Agent Base Rate [Member] Federal Funds Rate Federal Funds Effective Swap Rate [Member] Commercial Letters of Credit Commercial Letters of Credit [Member] Commercial Letters of Credit [Member] Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Goodwill and Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Schedule of Goodwill [Table] Schedule of Goodwill [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Goodwill [Line Items] Goodwill [Line Items] Goodwill [Roll Forward] Goodwill [Roll Forward] Goodwill, gross, beginning balance Goodwill, Gross Goodwill, purchase price allocation adjustments Goodwill, Purchase Accounting Adjustments Goodwill acquisitions Goodwill, Acquired During Period Goodwill, gross, ending balance Accumulated impairment losses Goodwill, Impaired, Accumulated Impairment Loss Goodwill Business Combinations [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Contingent Consideration by Type [Axis] Contingent Consideration by Type [Axis] Contingent Consideration Type [Domain] Contingent Consideration Type [Domain] Working Capital Adjustment [Member] Working Capital Adjustment [Member] The purchase price adjustment based on the working capital (current assets minus current liabilities) of the acquired business. Indemnification Agreement [Member] Indemnification Agreement [Member] Indemnification Portion Subject to Certain Conditions, Not Less Than Twelve Months Indemnification Portion Subject to Certain Conditions, Not Less Than Twelve Months [Member] Amount held in escrow available to the company for indemnification obligations of the seller to be released to the seller upon the occurrence of certain conditions, no sooner than twelve months after the closing date. Indemnification Portion Subject to Seller Satisfaction of Certain Liabilities Indemnification Portion Subject to Seller Satisfaction of Certain Liabilities [Member] Amount held in escrow to be released to the seller upon seller satisfaction of certain liabilities. Goodman Networks, Inc. Wireline Operations Goodman Networks, Inc. Wireline Operations [Member] Goodman Networks, Inc. Wireline Operations [Member] NextGen Telecom Services Group, Inc. NextGen Telecom Services Group, Inc. [Member] NextGen Telecom Services Group, Inc. [Member] Hewitt Power & Communications, Inc Hewitt Power & Communications, Inc [Member] Hewitt Power & Communications, Inc [Member] Series of Individually Immaterial Business Acquisitions [Member] Series of Individually Immaterial Business Acquisitions [Member] Moll's Utility Services, LLC Moll's Utility Services, LLC [Member] Moll's Utility Services, LLC [Member] Venture Communications Group, LLC Venture Communications Group, LLC [Member] Venture Communications Group, LLC [Member] Businesses Acquired, Fiscal 2016 Businesses Acquired, Fiscal 2016 [Member] Businesses Acquired, Fiscal 2016 [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Escrow Deposit Escrow Deposit Payment to acquire business, net of cash acquired Payments to Acquire Businesses, Gross Number of businesses acquired Number of Businesses Acquired Business Combination, Consideration Transferred Business Combination, Consideration Transferred Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred Seller Liability, Satisfaction Required for Contingent Consideration Seller Liability, Satisfaction Required for Contingent Consideration The amount of liabilities the seller must satisfy to receive the stated amount of contingent consideration. Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Amortization of Intangible Assets Gain on sale of fixed assets Gain (Loss) on Disposition of Property Plant Equipment Miscellaneous income, net of other expense Other Income Total other income, net Acquisitions Business Combination Disclosure [Text Block] Stock Options Employee Stock Option [Member] RSUs Restricted Stock Units (RSUs) [Member] Performance RSUs Performance Shares [Member] Target Share Units Target Shares [Member] Target Shares Supplemental Shares Supplemental Shares [Member] Supplemental Shares Share Price Share Price Granted (in dollars per shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Award service period Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period Unrecognized compensation expense related to stock options Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options Total compensation cost not yet recognized, period for recognition Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Compensation expense Potential Compensation Expense for Performance Based Shares If Performance Goals Are Met Potential Compensation Expense for Performance Based Shares If Performance Goals Are Met RSUs outstanding (in shares) Share-based Compensation by Share-based Payment Award, Equity Awards Other than Options, Target Amount Share-based compensation by share-based payment award, equity awards other than options, target amount of performance shares Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Forfeited or cancelled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Cancelled in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Cancelled in Period Shares outstanding (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Share-based Compensation by Share-based Payment Award, Equity Awards Other than Options, Shares Expected to Vest Share-based Compensation by Share-based Payment Award, Equity Awards Other than Options, Shares Expected to Vest Share-based Compensation by Share-based Payment Award, Equity Awards Other than Options, Shares Expected to Vest Share-based Compensation by Share-based Payment Award, Equity Awards Other than Options, Shares Expected to be Canceled Share-based Compensation by Share-based Payment Award, Equity Awards Other than Options, Shares Expected to be Canceled Share-based Compensation by Share-based Payment Award, Equity Awards Other than Options, Shares Expected to be Canceled Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and equivalents Cash and Cash Equivalents, at Carrying Value Accounts receivable, net Accounts Receivable, Net, Current Costs and estimated earnings in excess of billings Costs and Estimated Earnings in Excess of Billings Costs and Estimated Earnings in Excess of Billings Inventories Inventory, Net Deferred tax assets, net Deferred Tax Assets, Net of Valuation Allowance, Current Other current assets Other Assets, Current Total current assets Assets, Current Property and equipment, net Property, Plant and Equipment, Net Goodwill Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Other Other Assets, Noncurrent Total non-current assets Assets, Noncurrent Total assets Assets LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Current portion of debt Debt, Current Billings in excess of costs and estimated earnings Billings in Excess of Costs and Estimated Earnings Billings in Excess of Costs and Estimated Earnings Accrued insurance claims Accrued Insurance Claims, Current Carrying value as of the balance sheet date of obligations incurred through that date and payable to insurance entities and/or claimants to mitigate potential losses from auto liability, general liability, workers compensation, employee group health, and damage claims. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Other accrued liabilities Other Accrued Liabilities, Current Total current liabilities Liabilities, Current Long-term debt Accrued insurance claims Deferred tax liabilities, net non-current Deferred Tax Liabilities, Net, Noncurrent Other liabilities Other Liabilities, Noncurrent Total liabilities Liabilities COMMITMENTS AND CONTINGENCIES, Note 17 Commitments and Contingencies Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, par value $1.00 per share: 1,000,000 shares authorized: no shares issued and outstanding Preferred Stock, Value, Issued Common stock, par value $0.33 1/3 per share: 150,000,000 shares authorized: 31,420,310 and 33,381,779 issued and outstanding, respectively Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital, Common Stock Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Retained earnings Retained Earnings (Accumulated Deficit) Total stockholders’ equity Stockholders' Equity Attributable to Parent Total liabilities and stockholders’ equity Liabilities and Equity Schedule of Multiemployer Plans Schedule of Multiemployer Plans [Table Text Block] Debt outstanding Long-term Debt Repayments of Debt Repayments of Debt Debt Instrument, Increase, Accrued Interest Debt Instrument, Increase, Accrued Interest Redemption Premium Redemption Premium Debt Instrument, Redemption Price, Percentage Debt Instrument, Redemption Price, Percentage Gains (Losses) on Extinguishment of Debt, before Write off of Deferred Debt Issuance Cost Gain (Loss) on Extinguishment of Debt, before Write off of Debt Issuance Cost Write-off of deferred financing fees and premium on long-term debt Write off of Deferred Debt Issuance Cost Debt Debt Disclosure [Text Block] Contractors [Abstract] Costs and Estimated Earnings in Excess of Billings Costs and Estimated Earnings in Excess of Billings [Text Block] The Entire Disclosure of Costs and Estimated Earnings in Excess of Billings [Text Block] Income Taxes Income Tax Disclosure [Text Block] Schedule of Accounts Receivable Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Allowance for Doubtful Accounts Receivable Allowance for Credit Losses on Financing Receivables [Table Text Block] Accrued Insurance Claims Accrued Insurance Claims Disclosure [Text Block] The entire disclosure for accrued insurance claims UtiliQuest UtiliQuest [Member] A wholly-owned subsidiary of the Company. Contract backlog Order or Production Backlog [Member] Weighted average remaining useful lives (in years) Finite-Lived Intangible Assets, Remaining Amortization Period UtiliQuest trade name Indefinite-Lived Intangible Assets (Excluding Goodwill) Intangible Assets Gross Excluding Goodwill Intangible Assets, Gross (Excluding Goodwill) Accumulated amortization: Finite-Lived Intangible Assets, Accumulated Amortization Intangible assets, net Finite-Lived Intangible Assets, Period Increase (Decrease) Finite-Lived Intangible Assets, Period Increase (Decrease) Purchase Price Allocation, In Aggregate by Year [Abstract] Purchase Price Allocation, In Aggregate by Year [Abstract] Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Costs and estimated earnings in excess of billings Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Net Assets Acquired Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Leases [Abstract] Schedule of Future Minimum Rental Payments for Operating Leases Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Property, Plant and Equipment [Abstract] 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] Land Land [Member] Buildings Building [Member] Leasehold improvements Leasehold Improvements [Member] Vehicles Vehicles [Member] Computer hardware and software Computer Hardware and Software [Member] Computer hardware and software. Office furniture and equipment Furniture and Fixtures [Member] Equipment and machinery Machinery and Equipment [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Estimated Useful Lives (Years) Property, Plant and Equipment, Useful Life Total Property, Plant and Equipment, Gross Less: accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property and equipment, net Depreciation expense Depreciation Cost of Property Repairs and Maintenance Cost of Property Repairs and Maintenance Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] 2017 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2018 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2019 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Five 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Six Finite-Lived Intangible Assets, Amortization Expense, Year Six Thereafter Finite-Lived Intangible Assets, Amortization Expense, After Year Six Finite-Lived Intangible Assets, Amortization Expense, After Year Six Total Finite-Lived Intangible Assets, Net Outstanding Indebtedness Schedule of Debt [Table Text Block] Convertible Debt Convertible Debt [Table Text Block] Schedule Interest Rates for the Credit Agreement Schedule of Line of Credit Facilities [Table Text Block] Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule of Stock-based Compensation Expense and Related Tax Benefit Recognized Schedule of Share-based Compensation, Activity [Table Text Block] Schedule of Share-based Compensation, Stock Options Award Activity Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Schedule of Share-based Compensation, RSU and Performance RSU Activity Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Revenue Recognized Using Cost To Cost Percentage of Completion Method Revenue Recognized Using Cost To Cost Percentage of Completion Method [Member] Revenue recognized using cost-to-cost measure of the percentage of completion method of accounting. Income taxes payable Income Taxes Payable [Member] Income Taxes Payable [Member] Long-term Debt Long-term Debt [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Capitalized Computer Software, Net Capitalized Computer Software, Net Revenues Revenues Liability for Unpaid Claims and Claims Adjustment Expense, Incurred but Not Reported (IBNR) Claims, Amount Liability for Unpaid Claims and Claims Adjustment Expense, Incurred but Not Reported (IBNR) Claims, Amount Number of reportable segments Number of Reportable Segments Prepaid Expense and Other Assets Prepaid Expense and Other Assets Debt Issuance Costs, Net Contract revenues Percentage of Revenue Amount considered as a portion of total revenue for the fiscal period. Restricted cash Restricted Cash and Cash Equivalents Measurement period Business Combination, Measurement Period Business Combination, Measurement Period Investments and other noncurrent assets Investments and Other Noncurrent Assets Prior period reclassification adjustment Prior Period Reclassification Adjustment Fiscal period duration Fiscal Period Duration Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Line of credit current borrowing capacity Line of Credit Facility, Current Borrowing Capacity Debt Instrument, Covenant Compliance, Consolidated Leverage Ratio, Maximum Debt Instrument, Covenant Compliance, Consolidated Leverage Ratio, Maximum Debt Instrument, Covenant Compliance, Consolidated Leverage Ratio, Maximum Debt Instrument, Covenant Compliance, Consolidated Interest Coverage Ratio, Maximum Debt Instrument, Covenant Compliance, Consolidated Interest Coverage Ratio, Maximum Debt Instrument, Covenant Compliance, Consolidated Interest Coverage Ratio, Maximum Additional borrowing availability Line of Credit Facility, Remaining Borrowing Capacity 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 acquisitions: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Deferred income tax provision (benefit) Bad debt expense, net Provision for Doubtful Accounts Gain on sale of fixed assets Amortization of premium on long-term debt Amortization Of Premium On Long-Term Debt Amortization Of Premium On Long-Term Debt Amortization of debt discount Amortization of Debt Discount (Premium) Amortization of debt issuance costs and other Amortization of Debt Issuance Costs Excess tax benefit from share-based awards Excess Tax Benefit from Share-based Compensation, Operating Activities Change in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable, net Increase (Decrease) in Accounts Receivable Costs and estimated earnings in excess of billings, net Increase (Decrease) in Unbilled Receivables Other current assets and inventory Increase Decrease In Other Current Assets And Inventory The increase (decrease) during the reporting period in other current assets and inventory held by the reporting entity. Other assets Increase (Decrease) in Other Noncurrent Assets Income taxes receivable/payable Increase (Decrease) in Income Taxes Receivable Accounts payable Increase (Decrease) in Accounts Payable Accrued liabilities, insurance claims, and other liabilities 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] Cash paid for acquisitions, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Capital expenditures Payments to Acquire Property, Plant, and Equipment Proceeds from sale of assets Proceeds from Sale of Productive Assets Changes in restricted cash Increase (Decrease) in Restricted Cash Other investing activities Payments for (Proceeds from) Other Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from borrowings on senior credit agreement, including term loans Proceeds from Long-term Lines of Credit Principal payments on senior credit agreement, including term loans Repayments of Long-term Lines of Credit Proceeds from issuance of 0.75% convertible senior notes due 2021 Proceeds from Issuance of Senior Subordinated Debt Proceeds from Issuance of Senior Subordinated Debt Purchase of convertible note hedges Principal payments for satisfaction and discharge of 7.125% senior subordinated notes Repayments of Long-term Debt Debt issuance costs Payments of Debt Issuance Costs Repurchases of common stock Exercise of stock options Proceeds from Stock Options Exercised Restricted stock tax withholdings Payments Related to Tax Withholding for Share-based Compensation Excess tax benefit from share-based awards Excess Tax Benefit from Share-based Compensation, Financing Activities Principal payments on other financing activities Repayments of Long-term Capital Lease Obligations Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Net increase in cash and equivalents Cash and Cash Equivalents, Period Increase (Decrease) CASH AND EQUIVALENTS AT BEGINNING OF PERIOD CASH AND EQUIVALENTS AT END OF PERIOD SUPPLEMENTAL DISCLOSURE OF OTHER CASH FLOW ACTIVITIES AND NON-CASH INVESTING AND FINANCING ACTIVITIES: Supplemental Cash Flow Information [Abstract] Cash paid for interest Interest Paid Cash paid for taxes, net Income Taxes Paid Purchases of capital assets included in accounts payable or other accrued liabilities at period end Capital Expenditures Incurred but Not yet Paid Statement of Stockholders' Equity [Abstract] Common Stock, Shares Common Stock, Shares [Member] Common Stock, Shares [Member] Common Stock Common Stock [Member] Additional Paid-in Capital Additional Paid-in Capital [Member] AOCI Attributable to Parent AOCI Attributable to Parent [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning Balance, shares Beginning Balance, value Stock options exercised (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Stock options exercised Stock Issued During Period, Value, Stock Options Exercised Stock-based compensation Stock Issued During Period, Value, Issued for Services Stock-based compensation (shares) Stock Issued During Period, Shares, Issued for Services Issuance of restricted stock, net of tax withholdings Restricted Stock, Value, Shares Issued Net of Tax Withholdings Issuance of restricted stock, net of tax withholdings (shares) Restricted Stock, Shares Issued Net of Shares for Tax Withholdings Repurchase of common stock Repurchase of common stock (shares) Other comprehensive loss Other Comprehensive Income (Loss), Net of Tax Tax benefits from stock-based compensation Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Equity component of 0.75% convertible senior notes due 2021, net Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt Sale of warrants Adjustments to Additional Paid in Capital, Warrant Issued Purchase of convertible note hedges Adjustment to Additional Paid in Capital, Convertible Note Hedge Adjustment to Additional Paid in Capital, Convertible Note Hedge Ending Balance, shares Ending Balance, value Schedule of Operating Leased Assets [Table] Schedule of Operating Leased Assets [Table] Lease Arrangement, Type [Axis] Lease Arrangement, Type [Axis] Lease Arrangement, Type [Domain] Lease Arrangement, Type [Domain] Minimum Lease Term, Excess Of One Year Minimum Lease Term, Excess Of One Year [Member] Operating lease with original noncancelable terms in excess of one year. Minimum Lease Term, One Year or Less Minimum Lease Term, One Year or Less [Member] Leases with original noncancelable terms of one year or less. Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] Operating Leased Assets [Line Items] Operating Leased Assets [Line Items] 2017 Operating Leases, Future Minimum Payments Due, Next Twelve Months 2018 Operating Leases, Future Minimum Payments, Due in Two Years 2019 Operating Leases, Future Minimum Payments, Due in Three Years 2020 Operating Leases, Future Minimum Payments, Due in Four Years 2021 Operating Leases, Future Minimum Payments, Due in Five Years Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Total Operating Leases, Future Minimum Payments Due Operating Leases, Rent Expense, Net Operating Leases, Rent Expense Schedule of Goodwill Schedule of Goodwill [Table Text Block] Impairment Testing Assumptions Impairment Testing Assumptions [Table Text Block] Assumptions used by the company in the annual impairment test of indefinite-lived intangible assets. Schedule of Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Future Amortization Expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Concentration Risk [Table] Concentration Risk [Table] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Sales Revenue, Services, Net Sales Revenue, Services, Net [Member] Trade Accounts Receivable and Costs and Estimated Earnings Trade Accounts Receivable and Costs and Estimated Earnings [Member] Trade accounts receivable and costs and estimated earnings Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Customer Concentration Risk Customer Concentration Risk [Member] Major Customers [Axis] Customer [Axis] Name of Major Customer [Domain] Customer [Domain] Five Unnamed Customers Five Unnamed Customers [Member] Five Unnamed Customers AT&T Inc. ATT [Member] AT&T[Member] Windstream Corporation Windstream Corporation [Member] Customer that represents a significant portion of the Company's customer base. Another Customer Customer A [Member] Customer A [Member] Verizon Verizon [Member] Customer that represents a significant portion of the Company's customer base. Comcast Comcast [Member] Customer that represents a significant portion of the Company's customer base. CenturyLink CenturyLink [Member] Customer that represents a significant portion of the Company's customer base. Concentration Risk [Line Items] Concentration Risk [Line Items] Number of customers classified as highly concentrated Number of customers classified as highly concentrated The number of customers classified as highly concentrated in comparison to total revenue. Concentration risk percentage Concentration Risk, Percentage Accounts receivable, costs, and estimated earnings in excess of billings Concentration Risk, Amount Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. This also includes the amount included in cost of uncompleted contracts in excess of related billings, or unbilled accounts receivable. Interim Period, Costs Not Allocable [Table] Interim Period, Costs Not Allocable [Table] Seven Point One Two Five Percent Senior Subordinated Notes Due 2021 [Member] Nature of Expense [Axis] Nature of Expense [Axis] Interim Period, Costs Not Allocable [Domain] Interim Period, Costs Not Allocable [Domain] Interim Period, Costs Not Allocable [Line Items] Interim Period, Costs Not Allocable [Line Items] Gross Profit Gross Profit Earnings per common share (in dollars per share) 0.75% Convertible Notes Liability Component [Member] Convertible Notes Liability Component [Member] Convertible Notes Liability Component [Member] 0.75% Convertible Notes Equity Component [Member] Convertible Notes Equity Component [Member] Convertible Notes Equity Component [Member] Debt Instrument, Unamortized Discount Debt Instrument, Unamortized Discount Debt Issuance Cost Unamortized Debt Issuance Expense Net carrying amount of Notes Convertible Debt Equity component of 0.75% senior convertible notes due 2021, net Debt Instrument, Convertible, Carrying Amount of Equity Component Debt Instrument, Unamortized Discount (Premium), Net Debt Instrument, Unamortized Discount (Premium), Net Payments of Debt Issuance Costs Statement of Comprehensive Income [Abstract] Foreign currency translation losses, net of tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Costs and Estimated Earnings in Excess of Billings, Net Costs and Estimated Earnings in Excess of Billings, Net [Table Text Block] Tabular disclosure of costs and estimated earnings in excess of billings, net. Computation of Earnings Per Common Share Earnings Per Share [Text Block] Quarterly Financial Information Quarterly Financial Information [Table Text Block] Schedule of Multiemployer Plans [Table] Schedule of Multiemployer Plans [Table] Multiemployer Plan Name [Axis] Multiemployer Plan Name [Axis] Multiemployer Plan Name [Domain] Multiemployer Plan Name [Domain] The Plan Pension Hospitalization and Benefit Plan of the Electric Industry Pension Trust Fund [Member] Pension Hospitalization and Benefit Plan of the Electric Industry Pension Trust Fund Multiemployer Plan, Individually Insignificant Multiemployer Plans Multiemployer Plan, Individually Insignificant Multiemployer Plans [Member] Multiemployer Plans [Line Items] Multiemployer Plans [Line Items] Contribution to Plan, Company Percentage of Total Contribution to Plan, Company Percentage of Total The company contribution to a multiemployer plan as a percentage of total contributions. Multiemployer Plans, Certified Zone Status Multiemployer Plans, Certified Zone Status Multiemployer Plans, Funding Improvement Plan and Rehabilitation Plan Multiemployer Plans, Funding Improvement Plan and Rehabilitation Plan Multiemployer Plan, Period Contributions Multiemployer Plan, Period Contributions Multiemployer Plans, Surcharge Multiemployer Plans, Surcharge Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date Entity Tax Identification Number Entity Tax Identification Number Multiemployer Plans, Certified Zone Status, Date Multiemployer Plans, Certified Zone Status, Date Multiemployer Plans, Red Zone Threshold Multiemployer Plans, Red Zone Threshold Multiemployer Plans, Red Zone Threshold Multiemployer Plans, Yellow Zone Threshold Multiemployer Plans, Yellow Zone Threshold Multiemployer Plans, Yellow Zone Threshold Multiemployer Plans, Green Zone Threshold Multiemployer Plans, Green Zone Threshold Multiemployer Plans, Green Zone Threshold Trade Receivables Sold Trade Receivables Held-for-sale, Reconciliation to Cash Flow, Deductions from Held-for-sale Contract billings Billed Contracts Receivable Retainage Contract Receivable Retainage and Other Receivables Contract Receivable Retainage and Other Receivables Total Accounts Receivable, Gross Less: allowance for doubtful accounts Allowance for Doubtful Accounts Receivable, Current Accounts receivable, net Accounts Receivable, Net Allowance for Doubtful Accounts Receivable [Roll Forward] Allowance for Doubtful Accounts Receivable [Roll Forward] Allowance for doubtful accounts at beginning of period Allowance for Doubtful Accounts Receivable Amounts charged against the allowance Allowance for Doubtful Accounts Receivable, Write-offs Allowance for doubtful accounts at end of period Proceeds from Convertible Debt Proceeds from Convertible Debt Stock repurchased and retired during period, shares Proceeds from Debt for General Corporate Purposes Proceeds from Debt for General Corporate Purposes Proceeds from Debt for General Corporate Purposes Debt Instrument, Convertible, Conversion Ratio Debt Instrument, Convertible, Conversion Ratio Debt Instrument, Convertible, Threshold Trading Days Debt Instrument, Convertible, Threshold Trading Days Debt Instrument, Convertible, Threshold Consecutive Trading Days Debt Instrument, Convertible, Threshold Consecutive Trading Days Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger Debt Instrument, Convertible, Measurement Period, Threshold Consecutive Business Days Debt Instrument, Convertible, Measurement Period, Threshold Consecutive Business Days Debt Instrument, Convertible, Measurement Period, Threshold Consecutive Business Days Debt Instrument, Convertible, Measurement Period, Threshold Consecutive Trading Days Debt Instrument, Convertible, Measurement Period, Threshold Consecutive Trading Days Debt Instrument, Convertible, Measurement Period, Threshold Consecutive Trading Days Debt Instrument, Convertible, Measurement Period, Threshold Percentage of Product of Sale Price of Common Stock and Applicable Conversion Rate Debt Instrument, Convertible, Measurement Period, Threshold Percentage of Product of Sale Price of Common Stock and Applicable Conversion Rate Debt Instrument, Convertible, Measurement Period, Threshold Percentage of Product of Sale Price of Common Stock and Applicable Conversion Rate Debt Instrument, Comparable Yield Debt Instrument, Comparable Yield Debt Instrument, Comparable Yield Long-term Debt, Fair Value Long-term Debt, Fair Value Net carrying amount of Notes Debt Issuance Cost Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Stock Options, Outstanding [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Beginning balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Options exercised (in shares) Canceled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Ending balance (in shares) Exercisable options (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Stock Options, Outstanding, Weighted Average Exercise Price [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Beginning balance (in dollars per shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Options granted (in dollars per shares) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Options exercised (in dollars per shares) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Canceled (in dollars per shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Ending balance (in dollars per shares) Exercisable options (in dollars per shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Accrued payroll and related taxes Accrued Payroll Taxes, Current Accrued employee benefit and incentive plan costs Accrued Employee Benefits, Current Accrued construction costs Accrued Construction Costs, Current Accrued construction costs. Other current liabilities Other Liabilities, Current Total other accrued liabilities Costs incurred on contracts in progress Costs Incurred On Contracts In Progress Costs Incurred On Contracts In Progress Estimated to date earnings Estimated Earnings Loss Net On Contracts In Progress Estimated earnings, net of estimated losses on contracts in progress. Total costs and estimated earnings Costs in Excess of Billings, Current Less: billings to date Billings in Excess of Cost, Current Total costs in excess of billings Costs in Excess of Billings Costs and estimated earnings in excess of billings Billings in excess of costs and estimated earnings Total costs in excess of billings Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Schedule of Other Income, Net Interest and Other Income [Table Text Block] Pension and Other Postretirement Benefits Disclosure Pension and Other Postretirement Benefits Disclosure [Text Block] Schedule of Property and Equipment Property, Plant and Equipment [Table Text Block] Schedule of Earnings Per Share Reconciliation Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Outstanding [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] Beginning balance (in shares) Share units vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited or canceled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Ending balance (in shares) Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Beginning balance (in dollars per shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Share units vested (in dollars per shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Forfeited or canceled (in dollars per shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Ending balance (in dollars per shares) Basis of Presentation and Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Document and Entity Information [Abstract] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key 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 Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Property and Equipment Property, Plant and Equipment Disclosure [Text Block]