Income Tax Disclosure [Abstract] Components of Income Tax Expense (Benefit), Continuing Operations [Abstract] Components of Income Tax Expense (Benefit), Continuing Operations [Abstract] Income Tax Expense (Benefit), Continuing Operations, by Jurisdiction [Abstract] Income Tax Expense (Benefit), Continuing Operations, by Jurisdiction [Abstract] U.S. Federal Federal Income Tax Expense (Benefit), Continuing Operations [Abstract] Current Current Federal Tax Expense (Benefit) Deferred Deferred Federal Income Tax Expense (Benefit) Total Federal Income Tax Expense (Benefit), Continuing Operations State and local State and Local Income Tax Expense (Benefit), Continuing Operations [Abstract] Current Current State and Local Tax Expense (Benefit) Deferred Deferred State and Local Income Tax Expense (Benefit) Total State and Local Income Tax Expense (Benefit), Continuing Operations Foreign Foreign Income Tax Expense (Benefit), Continuing Operations [Abstract] Current Current Foreign Tax Expense (Benefit) Deferred Deferred Foreign Income Tax Expense (Benefit) Total Foreign Income Tax Expense (Benefit), Continuing Operations Total Income Taxes Income Tax Expense (Benefit), Continuing Operations [Abstract] Current Current Income Tax Expense (Benefit) Deferred Deferred Income Tax Expense (Benefit) Total Income Tax Expense (Benefit) Business Combinations [Abstract] Business Acquisition Business Combination Disclosure [Text Block] Earnings Per Share [Abstract] Basic: Weighted Average Number of Shares Outstanding, Basic [Abstract] Weighted average shares outstanding Weighted Average Number of Shares Outstanding, Basic Diluted: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Effect of dilutive securities: Dilutive Securities, Effect on Basic Earnings Per Share [Abstract] Common stock options Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Total weighted average shares outstanding assuming dilution Weighted Average Number of Shares Outstanding, Diluted Shares of common stock issued from the exercise of stock options Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Equity [Abstract] Purchase of Common Shares Treasury Stock [Text Block] Valuation and Qualifying Accounts [Abstract] Valuation and Qualifying Accounts Disclosure [Table] Valuation and Qualifying Accounts Disclosure [Table] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves [Domain] Valuation Allowances and Reserves [Domain] Allowance for doubtful accounts Allowance for Doubtful Accounts [Member] Valuation and Qualifying Accounts Disclosure [Line Items] Valuation and Qualifying Accounts Disclosure [Line Items] Activity in Provision for Doubtful Accounts Movement in Valuation Allowances and Reserves [Roll Forward] Balance at the Beginning of the Period Valuation Allowances and Reserves, Balance Charged to Revenue, Cost or Expense Valuation Allowances and Reserves, Charged to Cost and Expense Deduction Valuation Allowances and Reserves, Deductions Balance at the End of the Period Debt Disclosure [Abstract] Long-term Debt and Line of Credit Debt Disclosure [Text Block] Inventory Disclosure [Abstract] Inventory Inventory, Net Inventory, non-current Inventory, Noncurrent Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Scenario, Forecast Scenario, Forecast [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Debt instrument, covenant, fixed charge coverage ratio, maximum Debt Instrument, Covenant, Fixed Charge Coverage Ratio, Maximum Debt Instrument, Covenant, Fixed Charge Coverage Ratio, Maximum Debt instrument, covenant, leverage ratio, maximum Debt Instrument, Covenant, Leverage Ratio, Maximum Debt Instrument, Covenant, Leverage Ratio, Maximum Property, Plant and Equipment [Abstract] Summary of property and equipment Property, Plant and Equipment [Table Text Block] Accounting Policies [Abstract] Schedule of Revenue by Major Customers, by Reporting Segments [Table] Schedule of Revenue by Major Customers, by Reporting Segments [Table] Customer [Axis] Customer [Axis] Customer [Domain] Customer [Domain] Customer One Customer One [Member] Customer One [Member] Revenue, Major Customer [Line Items] Revenue, Major Customer [Line Items] Contract revenues Contracts Revenue Summary of Deferred Tax Assets and Liabilities, as Reported in the Balance Sheet [Abstract] Deferred Tax Assets and Liabilities, Net, Classification [Abstract] Deferred Tax Assets and Liabilities, Net, Classification [Abstract] Net current deferred tax assets Deferred Tax Assets, Net, Current Net non-current deferred tax liabilities Deferred Tax Liabilities, Net, Noncurrent Total net deferred tax liabilities: Deferred Tax Liabilities, Net Income Taxes Income Tax Disclosure [Text Block] Payables and Accruals [Abstract] Accrued Liabilities Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Common Stock [Member] Treasury Stock Treasury Stock [Member] Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Additional Paid-In Capital Additional Paid-in Capital [Member] Retained Earnings Retained Earnings [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning balance, shares Common Stock, Shares, Issued Beginning balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Beginning treasury stock, shares Treasury Stock, Shares Stock-based compensation Share-based Compensation Exercise of stock options, shares Exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Issue restricted stock, shares Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Cash flow hedge, net of tax Other Comprehensive Income (Loss), Net of Tax Forfeiture of restricted stock, shares Stock Issued During Period, Shares, Restricted Stock Award, Forfeited Purchase of stock into treasury, shares Treasury Stock, Shares, Acquired Purchase of shares into treasury Treasury Stock, Value, Acquired, Cost Method Net (loss) income Net Income (Loss) Attributable to Parent Ending balance, shares Ending balance Ending treasury stock, shares Stock Issued During Period, Value, New Issues Stock Issued During Period, Value, New Issues Goodwill and Intangible Assets Disclosure [Abstract] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Reported Value Measurement [Member] Reported Value Measurement [Member] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] TAS Commercial Concrete TAS Commercial Concrete [Member] TAS Commercial Concrete [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] Contractual backlog Order or Production Backlog [Member] Trade Names Trade Names [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Finite-lived Intangible Assets, Fair Value Disclosure Finite-lived Intangible Assets, Fair Value Disclosure Finite-lived intangibles acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Acquired finite-lived intangible assets, useful life Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Amortization expense Amortization of Intangible Assets Commitments and Contingencies Disclosure [Abstract] Sale Leaseback Transaction and Operating Leased Assets [Table] Sale Leaseback Transaction and Operating Leased Assets [Table] Sale Leaseback Transaction, Description [Axis] Sale Leaseback Transaction, Description [Axis] Sale Leaseback Transaction, Name [Domain] Sale Leaseback Transaction, Name [Domain] Office building Office Building [Member] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Vehicles Vehicles [Member] Other facilities Other Facilities [Member] Other Facilities [Member] Sale Leaseback Transaction and Operating Leased Assets [Line Items] [Line Items] for Sale Leaseback Transaction and Operating Leased Assets [Table] Sale Leaseback Transaction [Abstract] Sale Leaseback Transaction [Abstract] Sale Leaseback Transaction [Abstract] Proceeds from the sale-leaseback transaction Sale Leaseback Transaction, Gross Proceeds, Investing Activities Sale-leaseback term Sale Leaseback Transaction, Lease Term Sale Leaseback Transaction, Lease Term Deferred gain on sale-leaseback transaction Sale Leaseback Transaction, Deferred Gain, Gross Gain recognized on sale-lease back transaction Sale Leaseback Transaction, Current Period Gain Recognized Rent expense Sale Leaseback Transaction, Rent Expense Options to extend term of the lease for additional five years Sale Leaseback Transaction, Option to Extend Lease Term, Possible Number of Extensions Sale Leaseback Transaction, Option to Extend Lease Term, Possible Number of Extensions Maximum extension term of each option to extend Sale Leaseback Transaction, Option to Extend Lease, Extension Period Sale Leaseback Transaction, Option to Extend Lease, Extension Period Operating Leases, Rent Expense, Net [Abstract] Operating Leases, Rent Expense, Net [Abstract] Operating leases, rent expense Operating Leases, Rent Expense, Net Lease term of assets subject to operating leases Operating Leases, Lease Term Operating Leases, Lease Term Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of restricted stock activity Schedule of Nonvested Share Activity [Table Text Block] Schedule of stock options activity Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Schedule of stock option valuation assumptions Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule of intrinsic value of options exercised and fair value of shares vested Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Grant Date Intrinsic Value [Table Text Block] Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Heavy Civil Marine Construction Segment Heavy Civil Marine Construction Segment [Member] Heavy Civil Marine Construction Segment [Member] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] Mexico and the Caribbean Mexico and the Caribbean [Member] Mexico and the Caribbean [Member] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Intersegment Eliminations Intersegment Eliminations [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Number of reportable segments Number of Reportable Segments Schedule of Goodwill [Table] Schedule of Goodwill [Table] Estimate of Fair Value Measurement Estimate of Fair Value Measurement [Member] Reported Value Measurement Commercial Concrete Segment Commercial Concrete Segment [Member] Commercial Concrete Segment [Member] Goodwill [Line Items] Goodwill [Line Items] Goodwill impairment, segment value Goodwill Impairment, Segment Value Goodwill Impairment, Segment Value Intangible assets, value Goodwill Goodwill Quarterly Financial Information Disclosure [Abstract] Restatement Adjustment Restatement Adjustment [Member] Income tax expense Selected Quarterly Financial Information [Abstract] Selected Quarterly Financial Information [Abstract] Revenues Gross profit Gross Profit Operating (loss) income Operating Income (Loss) (Loss) income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Net (loss) income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Earnings Per Share, Basic and Diluted [Abstract] Earnings Per Share, Basic and Diluted [Abstract] Basic (USD per share) Earnings Per Share, Basic Diluted income (loss) per share (USD per share) Earnings Per Share, Diluted Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Long-term Debt Long-term Debt [Member] Short-term Debt Short-term Debt [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] Accounting Standards Update 2015-03 [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Term loan-current Term Loan, Current [Member] Term Loan, Current [Member] Term loan-long-term Term Loan, Noncurrent [Member] Term Loan, Noncurrent [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving Credit Facility Revolving Credit Facility [Member] Term Loan Term Loan [Member] Term Loan [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Line of Credit Line of Credit [Member] Loans Payable Loans Payable [Member] Principal current Debt Instrument, Carrying Amount, Current Debt Instrument, Carrying Amount, Current Principal, long-term Debt Instrument, Carrying Amount, Noncurrent Debt Instrument, Carrying Amount Noncurrent Principal Long-term Debt, Gross Deferred Finance Costs, current Deferred Finance Costs, Current, Net Deferred Issuance Costs, long-term Deferred Finance Costs, Noncurrent, Net Deferred Issuance Costs Deferred Finance Costs, Net Net Value, current Debt, Current Long-term Debt, Excluding Current Maturities Long-term Debt, Excluding Current Maturities Total debt Long-term Debt Hedging Liabilities, Noncurrent Hedging Liabilities, Noncurrent Line of credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Stated interest rate Debt Instrument, Interest Rate, Stated Percentage Debt issuance cost Debt Issuance Cost Debt issuance expense Debt Related Commitment Fees and Debt Issuance Costs Debt, weighted average interest rate Debt, Weighted Average Interest Rate Derivative, Fair Value, Net Derivative, Fair Value, Net Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] GLM Concrete Solutions, LLC GLM Concrete Solutions, LLC [Member] GLM Concrete Solutions, LLC [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Federal statutory tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Issued and outstanding membership interest acquired Business Acquisition, Percentage of Voting Interests Acquired Payments to acquire businesses Payments to Acquire Businesses, Gross Goodwill, net of working capital adjustment Goodwill, Net of Working Capital Adjustment Goodwill, Net of Working Capital Adjustment Goodwill expected to be tax deductible Business Acquisition, Goodwill, Expected Tax Deductible Amount Goodwill, tax basis, amortization period Business Acquisition, Goodwill, Expected Tax Deductible Amortization Period Business Acquisition, Goodwill, Expected Tax Deductible Amortization Period Property and equipment useful life Property, Plant and Equipment, Useful Life Acquisition related costs Business Combination, Acquisition Related Costs Accounts receivable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Costs and estimated earnings in excess of billings on uncompleted contracts Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Costs in Excess of Billings Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Costs in Excess of Billings Prepaid expenses and other current assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets Fixed assets, net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Investment in GLM Concrete Services, LLC Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Equity Method Investments Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Equity Method Investments Other intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Accounts payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Accrued expenses and other current liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accrued Expenses and Other Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accrued Expenses and Other Liabilities Total Acquisition Consideration at August 5, 2015 Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Working Capital Adjustment Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred Total Acquisition Consideration, Final Organization, Consolidation and Presentation of Financial Statements [Abstract] Description of Business and Basis of Presentation Business Description and Basis of Presentation [Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Revenue Recognition Revenue Recognition, Percentage-of-Completion Method [Policy Text Block] Classification of Current Assets and Liabilities Classification of Current Assets and Liabilities [Policy Text Block] Classification of Current Assets and Liabilities [Policy Text Block] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Risk Concentrations Concentration Risk, Credit Risk, Policy [Policy Text Block] Accounts Receivable Receivables, Policy [Policy Text Block] Advertising Costs Advertising Cost, Policy, Expensed Advertising Cost [Policy Text Block] Environmental Costs Environmental Costs, Policy [Policy Text Block] Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] Inventory Inventory, Policy [Policy Text Block] Property and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Goodwill Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Intangible Assets Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block] Stock-Based Compensation Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Income Taxes Income Tax, Policy [Policy Text Block] Insurance Coverage Insurance Coverage [Policy Text Block] Insurance Coverage [Policy Text Block] Warranty Costs Standard Product Warranty, Policy [Policy Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Statement of Comprehensive Income [Abstract] Change in fair value of cash flow hedge, net of tax expense of $25, and benefit of $90 and $0 for the years ended December 31, 2016, 2015 and 2014, respectively Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Total comprehensive (loss) income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Income Statement [Abstract] Costs of contract revenues Contract Revenue Cost Gross profit Selling, general and administrative expenses Selling, General and Administrative Expense Gain (Loss) on Disposition of Assets Gain (Loss) on Disposition of Assets Operating income (loss) Other (expense) income: Other Nonoperating Income (Expense) [Abstract] (Gain) loss from sale of assets, net Gain (Loss) on Disposition of Property Plant Equipment Other income Nonoperating Income (Expense) Interest income Interest Income, Deposits with Financial Institutions Interest expense Interest Expense Other (expense) income, net Other Nonoperating Income (Expense) (Loss) income before income taxes Income tax expense (benefit) Net (loss) income Basic income (loss) per share (USD per share) Shares used to compute (loss) income per share Basic (in shares) Diluted (in shares) Related Party Transactions [Abstract] Related Party Transactions Related Party Transactions Disclosure [Text Block] Risks and Uncertainties [Abstract] Concentration Risk [Table] Concentration Risk [Table] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Accounts receivable Trade and Contract Retainage Receivables [Member] Trade and Contract Retainage Receivables [Member] Contract revenues Sales Revenue, Services, Net [Member] Concentration Risk [Line Items] Concentration Risk [Line Items] Schedules of concentration of risk, by risk factor Schedules of Concentration of Risk, by Risk Factor [Table Text Block] Deferred tax asset Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] 2016 Operating Leases, Future Minimum Payments Due, Next Twelve Months 2017 Operating Leases, Future Minimum Payments, Due in Two Years 2018 Operating Leases, Future Minimum Payments, Due in Three Years 2019 Operating Leases, Future Minimum Payments, Due in Four Years 2020 Operating Leases, Future Minimum Payments, Due in Five Years Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Total Operating Leases, Future Minimum Payments Due Derivative, by Nature [Axis] Derivative, by Nature [Axis] Derivative, Name [Domain] Derivative, Name [Domain] Swap Swap [Member] Percent of aggregate principal amount hedged Derivative, Percent of Aggregate Principal Amount Hedged Derivative, Percent of Aggregate Principal Amount Hedged Derivative, notional amount Derivative, Notional Amount Derivative, number of instruments held (contract) Derivative, Number of Instruments Held Interest rate swap liability Schedule of accrued liabilities Schedule of Accrued Liabilities [Table Text Block] Schedule of recognized identified assets acquired and liabilities assumed Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Summary of Pro Forma Results Business Acquisition, Pro Forma Information [Table Text Block] Number of operating segments Number of Operating Segments Business Acquisition, Pro Forma Information [Abstract] Business Acquisition, Pro Forma Information [Abstract] Contract Revenues Business Acquisition, Pro Forma Revenue Operating income from continuing operations Business Acquisition, Pro Forma Operating Income (Loss) Business Acquisition, Pro Forma Operating Income (Loss) Net Income Business Acquisition, Pro Forma Net Income (Loss) Basic earnings per share (USD per share) Business Acquisition, Pro Forma Earnings Per Share, Basic Diluted earnings per share (USD per share) Business Acquisition, Pro Forma Earnings Per Share, Diluted Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Stock options Employee Stock Option [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Anti-dilutive stock options Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Potential antidilutive securities excluded from future computations (in shares) Potential Antidilutive Securities Excluded from Future Computations of Earnings, Amount Potential Antidilutive Securities Excluded from Future Computations of Earnings, Amount Goodwill and Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Fair Value Disclosures [Abstract] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule II - Valuation and Qualifying Accounts Schedule of Valuation and Qualifying Accounts Disclosure [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 reconciliation Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of deferred tax assets and liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Schedule of net deferred tax assets and liabilities as reported in the balance sheet Schedule of Net Deferred Tax Assets and Liabilities as Reported in the Balance Sheet [Table Text Block] Schedule of Net Deferred Tax Assets and Liabilities as Reported in the Balance Sheet [Table Text Block] Components of Deferred Tax Assets and Liabilities [Abstract] Components of Deferred Tax Assets and Liabilities [Abstract] Assets related to: Components of Deferred Tax Assets [Abstract] Current Components of Deferred Tax Assets, Current Components of Deferred Tax Assets, Current Accrued liabilities Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities, Current Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities, Current Intangible assets Deferred Tax Assets, Intangible Assets, Current Deferred Tax Assets, Intangible Assets, Current Non-qualified stock options Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost, Non-qualified Stock Options, Current Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost, Non-qualified Stock Options, Current Other Deferred Tax Assets, Other, Current Deferred Tax Assets, Other, Current Total assets Deferred Tax Assets, Net of Valuation Allowance, Current Long- term Components of Deferred Tax Assets, Noncurrent [Abstract] Components of Deferred Tax Assets, Noncurrent [Abstract] Intangible assets Deferred Tax Assets, Intangible Assets, Noncurrent Deferred Tax Assets, Intangible Assets, Noncurrent Net operating loss carryforward Deferred Tax Assets, Operating Loss Carryforwards, Noncurrent Deferred Tax Assets, Operating Loss Carryforwards, Noncurrent Valuation allowance Deferred Tax Assets, Valuation Allowance, Noncurrent Non-qualified stock options Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost, Non-qualified Stock Options, Noncurrent Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost, Non-qualified Stock Options, Noncurrent Foreign tax credits Deferred Tax Assets, Tax Credit Carryforwards, Foreign AMT credits Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax Other Deferred Tax Assets, Other, Noncurrent Deferred Tax Assets, Other, Noncurrent Total assets Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Liabilities related to: Components of Deferred Tax Liabilities [Abstract] Current Components of Deferred Tax Liabilities, Current [Abstract] Components of Deferred Tax Liabilities, Current [Abstract] Deferred revenue on maintenance contracts Deferred Tax Liabilities, Tax Deferred Income, Current Deferred Tax Liabilities, Tax Deferred Income, Current Other Deferred Tax Liabilities, Other, Current Deferred Tax Liabilities, Other, Current Total liabilities Deferred Tax Liabilities, Gross, Current Net current deferred tax assets Long- term Components of Deferred Tax Liabilities, Noncurrent [Abstract] Components of Deferred Tax Liabilities, Noncurrent [Abstract] Depreciation and amortization Deferred Tax Liabilities, Property, Plant and Equipment and Intangible Assets, Noncurrent Deferred Tax Liabilities, Property, Plant and Equipment and Intangible Assets, Noncurrent Goodwill Deferred Tax Liabilities, Goodwill and Gain on Acquisition, Noncurrent Deferred Tax Liabilities, Goodwill and Gain on Acquisition, Noncurrent Deferred revenue on maintenance contracts Deferred Tax Liabilities, Tax Deferred Income, Noncurrent Deferred Tax Liabilities, Tax Deferred Income, Noncurrent Other Deferred Tax Liabilities, Other, Noncurrent Deferred Tax Liabilities, Other, Noncurrent Total liabilities Deferred Tax Liabilities, Gross, Noncurrent Net non-current deferred tax liabilities Operating Loss Carryforwards [Table] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] State State and Local Jurisdiction [Member] Federal Tax Authority Domestic Tax Authority [Member] Operating Loss Carryforwards [Line Items] Net operating loss carryforward Operating Loss Carryforwards Valuation allowance Alternative minimum tax credits, non-expiring Tax Credit Carryforward, Amount Excess tax benefit from stock option exercise Unrecognized Tax Benefits Accounts Receivable [Abstract] Receivables [Abstract] Contract receivable retention Contract Receivable Retainage Retainage, long-term Contract Receivable Retainage, after Next Twelve Months 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] 2011 LTIP 2011 LTIP [Member] 2011 LTIP [Member] Award Type [Axis] Award Type [Axis] Award Type [Domain] Equity Award [Domain] Performance Shares Performance Shares [Member] Title of Individual [Axis] Title of Individual [Axis] Relationship to Entity [Domain] Relationship to Entity [Domain] Director Director [Member] Officers and Executives Officers and Executives [Member] Officers and Executives [Member] Directors, Officers and Executives Directors, Officers and Executives [Member] Directors, Officers and Executives [Member] Chief Operating Officer Chief Operating Officer [Member] Executive Officer Executive Officer [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Performance awards granted in period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Approved and authorized maximum number of shares to be issued Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Options, expiration period Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Options, vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Grants awarded during period Compensation Arrangement with Individual, Shares Issued Compensation Arrangement with Individual, Shares Issued Weighted average grant-date fair value of options granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Compensation expense related to stock based awards outstanding Allocated Share-based Compensation Expense Forfeiture rate applied to options Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Forfeiture Rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Forfeiture Rate Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Proceeds received upon exercise of stock options Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options Total share-based compensation cost not yet recognized Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Share-based compensation cost not yet recognized, period for recognition Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Total intrinsic value of options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Total fair value of shares vested Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value Schedule of Insurance Coverage [Table] Schedule of Insurance Coverage [Table] Schedule of Insurance Coverage [Table] Insurance Coverage by Liability Policies [Axis] Insurance Coverage by Liability Policies [Axis] Insurance Coverage by Liability Policies [Axis] Insurance Coverage by Liability Policies [Domain] Insurance Coverage by Liability Policies [Domain] Insurance Coverage by Liability Policies [Domain] Other liability policies Other Liability Policies [Member] Other Liability Policies [Member] Maritime employer's liability Maritime Employer's Liability [Member] Maritime Employer's Liability [Member] Watercraft pollution policy Watercraft Pollution Policy [Member] Watercraft Pollution Policy [Member] Insurance Coverage [Line Items] Insurance Coverage [Line Items] Insurance Coverage [Line Items] Levels of insurance coverage maintained by the Company Levels of Insurance Coverage Maintained by the Company Levels of Insurance Coverage Maintained by the Company Amount in excess of primary insurance coverage Additional Coverage in Excess of Primary Insurance Coverage Additional Coverage in Excess of Primary Insurance Coverage Primary limit of insurance coverage Primary Limit of Insurance Coverage Primary Limit of Insurance Coverage Number of Insurance Policies Number of Insurance Policies Number of Insurance Policies Accrual for self-insurance liabilities Accrued Insurance, Current Fair Value Fair Value Disclosures [Text Block] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis Schedule of Debt Schedule of Debt [Table Text Block] Debt Maturity Schedule Schedule of Maturities of Long-term Debt [Table Text Block] Inventory Inventory Disclosure [Text Block] Schedule of Long Lived Assets Held-for-sale [Table] Schedule of Long Lived Assets Held-for-sale [Table] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Other Nonoperating Income (Expense) Other Nonoperating Income (Expense) [Member] Long Lived Assets Held-for-sale [Line Items] Long Lived Assets Held-for-sale [Line Items] Depreciation expense Depreciation Impairment of Long-Lived Assets to be Disposed of Impairment of Long-Lived Assets to be Disposed of Impairment of Long-Lived Assets Held-for-use Impairment of Long-Lived Assets Held-for-use Compensation and Retirement Disclosure [Abstract] Schedule of multiemployer plans Schedule of Multiemployer Plans [Table Text Block] Statement of Financial Position [Abstract] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Accounts receivable: Accounts Receivable, Net, Current [Abstract] Trade, net of allowance of $0 and $0, respectively Trade Accounts Receivable, Net, Current Trade Accounts Receivable, Net, Current Retainage Contract Receivable Retainage, Next Twelve Months Other current Other Receivables Income taxes receivable Income Taxes Receivable, Current Costs and estimated earnings in excess of billings on uncompleted contracts Costs in Excess of Billings, Current Assets held for sale Assets Held-for-sale, Not Part of Disposal Group, Current Prepaid expenses and other Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property and equipment, net Property, Plant and Equipment, Net Accounts receivable, non-current Accounts Receivable, Net, Noncurrent Intangible assets, net of amortization Intangible Assets, Net (Excluding Goodwill) Other non-current Other Assets, Noncurrent Total assets Assets LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Current debt, net of debt issuance costs Accounts payable: Accounts Payable, Current [Abstract] Trade Accounts Payable, Trade, Current Retainage Retention Payable, Due in Next Rolling Twelve Months Accrued liabilities Accrued Liabilities, Current Taxes payable Accrued Income Taxes, Current Billings in excess of costs and estimated earnings on uncompleted contracts Billings in Excess of Cost, Current Total current liabilities Liabilities, Current Long-term debt, net of debt issuance costs Other long-term liabilities Other Liabilities, Noncurrent Deferred income taxes Total liabilities Liabilities Commitments and contingencies Commitments and Contingencies Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock -- $0.01 par value, 10,000,000 authorized, none issued Preferred Stock, Value, Issued Other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Common stock -- $0.01 par value, 50,000,000 authorized, 28,405,850 and 27,992,589 issued; 27,694,626 and 27,281,358 outstanding at December 31, 2016 and December 31, 2015, respectively Common Stock, Value, Issued Treasury stock, 711,231 and 711,231 shares, at cost December 31, 2016 and December 31, 2015, respectively Treasury Stock, Value Additional paid-in capital Additional Paid in Capital Retained earnings Retained Earnings (Accumulated Deficit) Total stockholders’ equity Stockholders' Equity Attributable to Parent Total liabilities and stockholders’ equity Liabilities and Equity Contractors [Abstract] Contracts in progress Schedule of Long-term Contracts or Programs in Progress [Table Text Block] Schedule of Long-term Contracts or Programs in Progress [Table Text Block] Property and Equipment Property, Plant and Equipment Disclosure [Text Block] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Customer concentration risk Customer Concentration Risk [Member] Customer by Type [Axis] Customer by Type [Axis] Customer by Type [Axis] Customer by Type [Domain] Customer by Type [Domain] Customer by Type [Domain] Federal Government Customer Type, Federal [Member] Customer Type, Federal [Member] State Governments Customer Type, State [Member] Customer Type, State [Member] Local Governments Customer Type, Local [Member] Customer Type, Local [Member] Private Companies Customer Type, Private [Member] Customer Type, Private [Member] Major Customers [Axis] Name of Major Customer [Domain] Private sector customer Private Sector Customer [Member] Private Sector Customer [Member] US Army Corps of Engineers U.S. Army Corps of Engineers [Member] U.S. Army Corps of Engineers [Member] Trade and contract retainage receivables Foreign Foreign [Member] Foreign [Member] Trade and retainage receivables Trade Accounts Receivable and Contract Receivable Retainage, Net Trade Accounts Receivable and Contract Receivable Retainage, Net Concentration risk, percentage Concentration Risk, Percentage Contract revenues, percent Contracts Revenue, Percent Contracts Revenue, Percent Schedule of earnings per share, basic and diluted Schedule of Weighted Average Number of Shares [Table Text Block] Change in fair value of cash flow hedge, net of tax Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Letter of Credit Letter of Credit [Member] Bridge Loan Bridge Loan [Member] Minimum additional borrowing amount Line of Credit Facility, Minimum Additional Borrowing Amount Line of Credit Facility, Minimum Additional Borrowing Amount Amount over minimum additional borrowing amount, integral multiples Line of Credit Facility, Amount Over Minimum Additional Borrowing Amount, Integral Multiples Line of Credit Facility, Amount Over Minimum Additional Borrowing Amount, Integral Multiples Line of credit facility, amount outstanding Line of Credit Facility, Fair Value of Amount Outstanding Letters of credit outstanding Letters of Credit Outstanding, Amount Remaining borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Repayments of debt Repayments of Debt Proceeds from lines of credit Proceeds from Lines of Credit Statement of Cash Flows [Abstract] Acquisition of TAS and purchase price adjustment Acquisition of Business in Alaska [Member] Acquisition of Business in Alaska [Member] Houston Industrial Tool Services, Inc. Houston Industrial Tool Services, Inc. [Member] Houston Industrial Tool Services, Inc. [Member] Acquisition of business in Pacific Northwest Acquisition of business in Pacific Northwest [Member] Acquisition of business in Pacific Northwest [Member] Acquisition in February 2010 of business located in Pacific Northwest Acquisition of TW LaQuay Dredging [Member] Acquisition of TW LaQuay Dredging [Member] Acquisition of TW LaQuay Dredging [Member] Acquisition of TW LaQuay dredging business in 2010 Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net loss to net cash provided by operating activities Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization Deferred financing cost amortization Amortization of Financing Costs Bad debt expense Provision for Doubtful Accounts Deferred income taxes (Gain) loss on sale of property and equipment Change in operating assets and liabilities, net of effects of acquisitions: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable Increase (Decrease) in Accounts Receivable Income tax receivable Increase (Decrease) in Income Taxes Receivable Inventory Increase (Decrease) in Inventories Accounts receivable, non-current Increase (Decrease) in Long-term Receivables, Current Prepaid expenses and other Increase (Decrease) in Prepaid Expense and Other Assets Costs and estimated earnings in excess of billings on uncompleted contracts Increase Decrease in Costs in excess of billings Increase Decrease in Costs in excess of billings Accounts payable Increase (Decrease) in Accounts Payable Accrued liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Income tax payable Increase (Decrease) in Income Taxes Payable Billings in excess of costs and estimated earnings on uncompleted contracts Increase (Decrease) in Billing in Excess of Cost of Earnings Deferred revenue Increase (Decrease) in Deferred Revenue Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Proceeds from sale of property and equipment Proceeds from Sale of Property, Plant, and Equipment Purchase of property and equipment Payments to Acquire Property, Plant, and Equipment Payments for acquisition of businesses Payments to Acquire Businesses, Net of Cash Acquired Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Borrowings from Credit Facility Payments made on borrowings from Credit Facility Extinguishment of debt Repayments of Long-term Debt Loan costs from Credit Facility Payments of Financing Costs Exercise of stock options Proceeds from Stock Options Exercised Purchase of shares into treasury Payments for Repurchase of Equity Net cash (used in) provided by financing activities Net Cash Provided by (Used in) Financing Activities Net change in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents at beginning of year Cash and cash equivalents at end of year Supplemental disclosures of cash flow information, cash paid during the period for: Supplemental Cash Flow Information [Abstract] Interest Interest Paid Taxes, net of refunds Income Taxes Paid, Net Stock-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Selected Quarterly Financial Data Quarterly Financial Information [Text Block] Restricted stock Restricted Stock [Member] Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Beginning nonvested shares (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (in shares) Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited/repurchased shares (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Ending nonvested shares (in shares) Weighted Average Fair Value Per Share Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Beginning nonvested shares (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value 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 Vested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Forfeited/repurchased shares (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 Ending nonvested shares (in dollars per share) Defined Contribution Plan [Table] Defined Contribution Plan [Table] Contribution Plan, Employer Matching Contribution [Axis] Contribution Plan, Employer Matching Contribution [Axis] Contribution Plan, Employer Matching Contribution [Axis] Contribution Plan, Employer Matching Contribution [Domain] Contribution Plan, Employer Matching Contribution [Domain] [Domain] for Contribution Plan, Employer Matching Contribution [Axis] Range 1 Range One [Member] Range One [Member] Range 2 Range Two [Member] Range Two [Member] AGC Southwest Chapters 401(k) Retirement Plan AGC Southwest Chapters 401(k) Retirement Plan [Member] AGC Southwest Chapters 401(k) Retirement Plan [Member] Defined Contribution Plan [Line Items] Defined Contribution Plan [Line Items] [Line Items] for Defined Contribution Plan [Table] 401 (k) Retirement Plan [Abstract] Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract] Minimum service period for plan eligibility Defined Contribution Plan, Requisite Service Period Defined Contribution Plan, Requisite Service Period Minimum allowable contribution to the plan by each employee, percent Defined Contribution Plan, Annual Contribution By Employee, Minimum Allowable Amount, Percent Defined Contribution Plan, Annual Contribution By Employee, Minimum Allowable Amount, Percent Maximum allowable contribution to the plan by each employee, percent Defined Contribution Plan, Annual Contribution By Employee, Maximum Allowable Amount, Percent Defined Contribution Plan, Annual Contribution By Employee, Maximum Allowable Amount, Percent Employer matching contribution, percent Defined Contribution Plan, Employer Matching Contribution, Percent of Match Employers matching contribution, vesting period Defined Contribution Plan, Employers Matching Contribution, Vesting Period Defined Contribution Plan, Employers Matching Contribution, Vesting Period Company contributions to the plan Defined Contribution Plan, Cost Recognized Employer matching contribution, percent of employees' gross pay Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay Employer discretionary contribution amount Defined Contribution Plan, Employer Discretionary Contribution Amount Summary of Significant Accounting Principles Significant Accounting Policies [Text Block] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Affiliated Entity Affiliated Entity [Member] Related Party Transaction [Axis] Related Party Transaction [Axis] Related Party Transaction [Domain] Related Party Transaction [Domain] Lease Arrangement Lease Arrangement [Member] Lease Arrangement [Member] Acquisition of Houston Industrial Tool Services, Inc. Acquisition of Houston Industrial Tool Services, Inc. [Member] Acquisition of Houston Industrial Tool Services, Inc. [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Operating leases, annual lease amount Operating Leases, Annual Lease Amount Operating Leases, Annual Lease Amount Payroll expense related to subcontracted employees Related Party Transaction, Expenses from Transactions with Related Party Management services to TAS Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party Costs incurred on uncompleted contracts Inventory for Long-term Contracts or Programs, Costs Incurred on Uncompleted Contracts Inventory for Long-term Contracts or Programs, Costs Incurred on Uncompleted Contracts Estimated earnings Inventory for Long-term Contracts or Programs, Estimated Earnings on Uncompleted Contracts Inventory for Long-term Contracts or Programs, Estimated Earnings on Uncompleted Contracts Costs incurred and estimated earnings on uncompleted contracts Inventory for Long-term Contracts or Programs, Gross Less: Billings to date Billed Contracts Receivable Costs and estimated earnings in excess of billings on uncompleted contracts, net Costs in Excess of Billings on Uncompleted Contracts, Net Costs in Excess of Billings on Uncompleted Contracts, Net Billings in excess of costs and estimated earnings on uncompleted contracts Costs and estimated earnings in excess of billings on completed contracts Costs incurred on Completed Contracts Costs incurred on Completed Contracts Earnings (Loss) Per Share Earnings Per Share [Text Block] Effective Income Tax Rate Reconciliation, Amount [Abstract] Statutory amount (computed at 35%) Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount State income tax, net of federal benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Permanent differences Income Tax Reconciliation, Permanent Differences Income Tax Reconciliation, Permanent Differences Permanent differences, incentive stock options Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Amount True up to prior year taxes Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount Valuation allowance, current Deferred Tax Assets, Valuation Allowance, Current Consolidated effective tax rate Effective Income Tax Rate Reconciliation, Percent Goodwill [Roll Forward] Goodwill [Roll Forward] Beginning balance, January 1 Additions Goodwill, Acquired During Period Ending balance Document and Entity Information [Abstract] 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 Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding 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 Public Float Entity Public Float Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Automobiles and trucks Building and improvements Building and Building Improvements [Member] Construction equipment Construction Equipment [Member] Construction Equipment [Member] Dredges and dredging equipment Marine Services Equipment [Member] Office equipment Office Equipment [Member] Construction in progress Construction in Progress [Member] Land Land [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property, plant and equipment, gross Property, Plant and Equipment, Gross Less: accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property, Pant and Equipment, Net Book Value of Depreciable Assets Property, Pant and Equipment, Net Book Value of Depreciable Assets Property, Pant and Equipment, Net Book Value of Depreciable Assets Current assets: Allowance for doubtful accounts Allowance for Doubtful Accounts Receivable, Current Stockholders' Equity: Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized Preferred Stock, Shares Authorized Preferred stock, shares issued Preferred Stock, Shares Issued Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common stock, shares outstanding Common Stock, Shares, Outstanding Treasury stock, shares Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Discount rate Fair Value Inputs, Discount Rate Percentage of fair value in excess of carrying amt Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount Revenue growth rate implied in reporting units valuations, number of years projected Fair Value Measurement, Assumptions Used to Calculate Reporting Unit Fair Value, Revenue Growth Rate, Period Evaluated Fair Value Measurement, Assumptions Used to Calculate Reporting Unit Fair Value, Revenue Growth Rate, Period Evaluated Schedule of Segment Reporting Schedule of Segment Reporting Information, by Segment [Table Text Block] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period [Domain] 2017 Long-term Debt, Maturities, Repayments of Principal in Year Two 2018 Long-term Debt, Maturities, Repayments of Principal in Year Three 2019 Long-term Debt, Maturities, Repayments of Principal in Year Four 2020 Long-term Debt, Maturities, Repayments of Principal in Year Five Schedule of quarterly financial information Schedule of Quarterly Financial Information [Table Text Block] Schedule of changes in goodwill Schedule of Goodwill [Table Text Block] Schedule of changes and amortization of finite-lived intangible assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Summary of Finite-lived Intangible Assets Amortization Expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Equity Award [Domain] Stock Option Equity Option [Member] Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Expected term of options Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Schedule of Multiemployer Plans [Table] Schedule of Multiemployer Plans [Table] Multiemployer Plan Type [Axis] Multiemployer Plan Type [Axis] Multiemployer Plans Type [Domain] Multiemployer Plans Type [Domain] Multiemployer Plans, Pension Multiemployer Plans, Pension [Member] Collective Bargaining Arrangement [Axis] Collective Bargaining Arrangement [Axis] Collective Bargaining Arrangement [Domain] Collective Bargaining Arrangement [Domain] International Union of Operating Engineers - Employers Construction Industry Retirement Plan - Local 302 and 612 Trust Funds International Union of Operating Engineers-Employers Construction Industry Retirement Plan [Member] International Union of Operating Engineers-Employers Construction Industry Retirement Plan [Member] Associated General Contractors of Washington Carpenter, Piledrivers, and Millwrights Associated General Contractors of Washington Carpenter, Piledrivers, and Millwrights [Member] Associated General Contractors of Washington Carpenter, Piledrivers, and Millwrights [Member] Alaska Carpenters Trust Fund Alaska Carpenters Trust Fund [Member] Alaska Carpenters Trust Fund [Member] Alaska Laborers Trust Fund Alaska Laborers Trust Fund [Member] Alaska Laborers Trust Fund [Member] Multiemployer Plans [Line Items] Multiemployer Plans [Line Items] Certified Zone Status Multiemployer Plans, Certified Zone Status Contributions Multiemployer Plan, Period Contributions Expiration of Collective Bargaining Agreement Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date Accrued Liabilities, Current [Abstract] Accrued Liabilities, Current [Abstract] Accrued salaries, wages and benefits Employee-related Liabilities, Current Property taxes Accrual for Taxes Other than Income Taxes, Current Sales tax Sales and Excise Tax Payable Interest Interest Payable, Current Payable to TAS Seller Accrued Payments to Acquire Businesses Accrued Payments to Acquire Businesses Other accrued expenses Other Accrued Liabilities, Current Total accrued liabilities Schedule of future minimum rental payments for operating leases Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Concentration of Risk and Enterprise Wide Disclosures Concentration Risk Disclosure [Text Block] Advertising Expense [Abstract] Advertising Expense and Warranty Accrual [Abstract] Advertising Expense and Warranty Accrual [Abstract] Advertising expense Advertising Expense Segment Reporting Segment Reporting Disclosure [Text Block] Employee Benefits Compensation and Employee Benefit Plans [Text Block] Percentage off fair value in excess of carry amt Depreciable lives of property and equipment Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Beginning stock options outstanding (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Exercised (in shares) Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Ending stock options outstanding (in shares) Weighted Average Exercise Price Per Share Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Beginning stock options outstanding (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Granted (in dollars per share) Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Forfeited (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Ending stock options outstanding (in dollars per share) Vested and expected to vest at December 31, 2016 Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract] Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Weighted Average Exercise Price Per Share (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Weighted Average Contractual Life Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value December 31, 2016 Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Weighted Average Exercise Price Per Share (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Weighted Average Contractual Life Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Equipment improvement Equipment Improvement [Member] Equipment Improvement [Member] Dry-docking capitalized costs Dry-docking Capitalized Costs [Member] Dry-docking Capitalized Costs [Member] Change in Accounting Estimate by Type [Axis] Change in Accounting Estimate by Type [Axis] Change in Accounting Estimate, Type [Domain] Change in Accounting Estimate, Type [Domain] Diluted (in dollars per share) LIBOR London Interbank Offered Rate (LIBOR) [Member] Quarterly principal payments Debt Instrument, Periodic Payment, Principal Repayments of Debt Current portion of debt Line of Credit, Current Non-current portion of debt Long-term Line of Credit, Noncurrent Effective interest rate Debt Instrument, Interest Rate, Effective Percentage Finite-lived Intangible Assets, Gross [Roll Forward] Finite-lived Intangible Assets, Gross [Roll Forward] Finite-lived Intangible Assets, Gross [Roll Forward] Intangible assets, January 1 Finite-Lived Intangible Assets, Gross Additions Finite-lived Intangible Assets Acquired Total intangible assets, end of year Accumulated Amortization [Roll Forward] Accumulated Amortization [Roll Forward] Accumulated Amortization [Roll Forward] Accumulated amortization, January 1 Finite-Lived Intangible Assets, Accumulated Amortization Current year amortization Total accumulated amortization Net intangible assets, end of year Finite-Lived Intangible Assets, Net Operating Segments Operating Segments [Member] Depreciation and amortization Assets 2016 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 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 Thereafter Finite-Lived Intangible Assets, Amortization Expense, after Year Five Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Assets Assets [Member] Liability Liability [Member] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring Fair Value, Measurements, Recurring [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Fair Value, Inputs, Level 1 Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 2 Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 3 Fair Value, Inputs, Level 3 [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Cash surrender value of life insurance Cash Surrender Value, Fair Value Disclosure Derivatives, Fair Value, Net Life Insurance, number of employees Life Insurance, Corporate or Bank Owned, Number of Employees Life Insurance, Corporate or Bank Owned, Number of Employees Life Insurance, face amount Life Insurance, Corporate or Bank Owned, Amount Fair value of debt Debt Instrument, Fair Value Disclosure Contracts in Progress Long-term Contracts or Programs Disclosure [Text Block] Stock Repurchase Program [Abstract] Stock Repurchase Program [Abstract] Stock Repurchase Program [Abstract] Stock repurchase program, authorized amount Stock Repurchase Program, Authorized Amount Stock repurchase program, expected duration Stock Repurchase Program, Expected Duration Stock Repurchase Program, Expected Duration Stock repurchased during period, shares Stock repurchased during period, average (USD per share) Treasury Stock Acquired, Average Cost Per Share Balance outstanding under revolver balance outstanding under revolver balance outstanding under revolver Term loan amount outstanding Line of Credit Facility, Revolving Credit Converted to Term Loan, Amount Outstanding Line of Credit Facility, Revolving Credit Converted to Term Loan, Amount Outstanding Extinguishment of debt