Contractors [Abstract]
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
Costs and estimated earnings in excess of billings on uncompleted contracts
Costs in Excess of Billings, Current
Billings in excess of costs and estimated earnings on uncompleted contracts
Billings in Excess of Cost, Current
Commitments and Contingencies Disclosure [Abstract]
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2015
Operating Leases, Future Minimum Payments Due, Next Twelve Months
2016
Operating Leases, Future Minimum Payments, Due in Two Years
2017
Operating Leases, Future Minimum Payments, Due in Three Years
2018
Operating Leases, Future Minimum Payments, Due in Four Years
2019
Operating Leases, Future Minimum Payments, Due in Five Years
Thereafter
Operating Leases, Future Minimum Payments, Due Thereafter
Total
Operating Leases, Future Minimum Payments Due
Commitments and Contingencies
Commitments and Contingencies Disclosure [Text Block]
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Award Type [Axis]
Award Type [Axis]
Award Type [Domain]
Equity Award [Domain]
Restricted stock
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
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)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
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)
Contracts in Progress
Long-term Contracts or Programs Disclosure [Text Block]
Compensation and Retirement Disclosure [Abstract]
Schedule of multiemployer plans
Schedule of Multiemployer Plans [Table Text Block]
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]
Land
Land [Member]
Range [Axis]
Range [Axis]
Range [Domain]
Range [Domain]
Minimum
Minimum [Member]
Maximum
Maximum [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
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]
Rent expense
Operating Leases, Rent Expense, Net
Lease term of assets subject to operating leases
Operating Leases, Lease Term
Operating Leases, Lease Term
Prepayments of future operating lease payments
Prepayments of Operating Lease Payments
Prepayments of Operating Lease Payments
Income Tax Disclosure [Abstract]
Income Taxes
Income Tax Disclosure [Text Block]
Document and Entity Information [Abstract]
Document and Entity Information [Abstract]
Entities [Table]
Entities [Table]
Legal Entity [Axis]
Legal Entity [Axis]
Entity [Domain]
Entity [Domain]
Entity Information [Line Items]
Entity Information [Line Items]
Entity Registrant Name
Entity Registrant Name
Entity Central Index Key
Entity Central Index Key
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
Business Combinations [Abstract]
Schedule of Business Acquisitions, by Acquisition [Table]
Schedule of Business Acquisitions, by Acquisition [Table]
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]
Trade name
Trade Names [Member]
Backlog
Order or Production Backlog [Member]
Construction equipment
Construction Equipment [Member]
Construction Equipment [Member]
Business Acquisition [Axis]
Business Acquisition [Axis]
Business Acquisition, Acquiree [Domain]
Business Acquisition, Acquiree [Domain]
West Construction, Inc.
West Construction, Inc. [Member]
West Construction, Inc. [Member]
Business Acquisition [Line Items]
Business Acquisition [Line Items]
Business Combination, Assets and Liabilities Arising from Contingencies [Abstract]
Business Combination, Assets and Liabilities Arising from Contingencies [Abstract]
Cash paid to acquire business
Payments to Acquire Businesses, Gross
Additional potential cash payment consideration, period following acquisition close taken into consideration
Business Acquisition, Contingent Consideration, Basis for Potential Cash Payment, Earnings Before Interest, Taxes, Depreciation, and Amortization Generated, Period Following Acquisition
Business Acquisition, Contingent Consideration, Basis for Potential Cash Payment, Earnings Before Interest, Taxes, Depreciation, and Amortization Generated, Period Following Acquisition
Contingent consideration, at fair value
Business Combination, Contingent Consideration, Liability
Number of foreign entities the Company acquired ownership interest during period
Business Acquisition, Ownership Acquired in Foreign Entities, Number of Entities
Business Acquisition, Ownership Acquired in Foreign Entities, Number of Entities
Consulting and sales agreement entered into with the acquiree company personnel, contract term
Business Acquisition, Consulting and Sales Agreement Entered Into with the Acquiree Company Personnel, Engagement Term
Business Acquisition, Consulting and Sales Agreement Entered Into with the Acquiree Company Personnel, Engagement Term
Lease agreement with the Seller company, lease term
Business Acquisition, Lease Agreement with Acquiree, Term
Business Acquisition, Lease Agreement with Acquiree, Term
Acquired intangible assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles
Acquired intangible assets useful life
Finite-Lived Intangible Asset, Useful Life
Property and equipment useful life
Property, Plant and Equipment, Useful Life
Goodwill
Goodwill
Goodwill acquired during period, amortization period for tax purposes
Goodwill Acquired During Period, Amortization Period for Tax Purposes
Goodwill Acquired During Period, Amortization Period for Tax Purposes
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
Earnings (Loss) Per Share
Earnings Per Share [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]
Risks and Uncertainties [Abstract]
Concentration Risk [Table]
Concentration Risk [Table]
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]
Customer [Axis]
Name of Major Customer [Domain]
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]
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Domain]
Concentration Risk Benchmark [Domain]
Trade and contract retainage receivables
Trade and Contract Retainage Receivables [Member]
Trade and Contract Retainage Receivables [Member]
Contract revenues
Sales Revenue, Services, Net [Member]
Geographical [Axis]
Geographical [Axis]
Geographical [Domain]
Geographical [Domain]
Foreign
Foreign [Member]
Foreign [Member]
Concentration Risk [Line Items]
Concentration Risk [Line Items]
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
Contracts Revenue
Contract revenues, percent
Contracts Revenue, Percent
Contracts Revenue, Percent
Concentration of Risk and Enterprise Wide Disclosures
Concentration Risk Disclosure [Text Block]
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Fixed assets, including inventory
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory, Property, Plant, and Equipment
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory, Property, Plant, and Equipment
Seller receivables
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Receivables
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Receivables
Intangible assets
Payable to Seller
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Payables
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Payables
Noncontrolling interest
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value
Total recognized identifiable assets acquired, goodwill, and liabilities assumed, net
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Finite-Lived Intangible Assets [Table]
Schedule of Finite-Lived Intangible Assets [Table]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets [Line Items]
Amortization expense, expected to be recorded in 2015
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months
Employee Benefits
Compensation and Employee Benefit Plans [Text Block]
Goodwill [Roll Forward]
Goodwill [Roll Forward]
Beginning balance, January 1
Additions
Goodwill, Acquired During Period
Ending balance
Accounting Policies [Abstract]
Accounts Receivable [Abstract]
Receivables [Abstract]
Contract receivable retention
Contract Receivable Retainage
Retainage, long-term
Contract Receivable Retainage, Due after Next Twelve Months
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Financial Information [Abstract]
Selected Quarterly Financial Information [Abstract]
Revenues
Gross profit
Gross Profit
Operating (loss) income
Operating Income (Loss)
Net (loss) income
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Net income (loss) attributable to noncontrolling interest
Net Income (Loss) Attributable to Noncontrolling Interest
Net (loss) income attributable to common stockholders
Net Income (Loss) Attributable to Parent
Earnings Per Share, Basic and Diluted [Abstract]
Earnings Per Share, Basic and Diluted [Abstract]
Basic (in dollars per share)
Earnings Per Share, Basic
Diluted loss per share (in dollars per share)
Earnings Per Share, Diluted
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 of deferred balances for non-qualified stock options
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount
True up to prior year taxes
Effective Income Tax Rate Reconciliation, State Taxes Adjustments, Amount
Effective Income Tax Rate Reconciliation, State Taxes Adjustments, Amount
True up to prior year taxes
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount
Other (net)
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount
Total
Income Tax Expense (Benefit)
Consolidated effective tax rate
Effective Income Tax Rate Reconciliation, Percent
Federal statutory tax rate
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Schedule of quarterly financial information
Schedule of Quarterly Financial Information [Table Text Block]
Statement of Financial Position [Abstract]
Statement [Table]
Statement [Table]
Scenario [Axis]
Scenario [Axis]
Scenario, Unspecified [Domain]
Scenario, Unspecified [Domain]
Statement [Line Items]
Statement [Line Items]
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
Trade Accounts Receivable, Net, Current
Trade Accounts Receivable, Net, Current
Retainage
Contract Receivable Retainage, Due in Next Twelve Months
Other
Other Receivables
Income taxes receivable
Income Taxes Receivable, Current
Inventory
Inventory, Net
Deferred tax asset
Deferred Tax Assets, Net, Current
Asset held for sale
Assets Held-for-sale, 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
Inventory, non-current
Inventory, Noncurrent
Intangible Assets, Net (Excluding Goodwill)
Intangible Assets, Net (Excluding Goodwill)
Other assets
Other Assets, Noncurrent
Total assets
Assets
LIABILITIES AND STOCKHOLDERS’ EQUITY
Liabilities and Equity [Abstract]
Current liabilities:
Liabilities, Current [Abstract]
Current debt
Debt, Current
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
Accrued Income Taxes, Current
Accrued Income Taxes, Current
Billings in excess of costs and estimated earnings on uncompleted contracts
Total current liabilities
Liabilities, Current
Long-term debt
Long-term Debt, Excluding Current Maturities
Other long-term liabilities
Other Liabilities, Noncurrent
Deferred income taxes
Deferred Tax Liabilities, Net, Noncurrent
Deferred revenue
Deferred Revenue, Noncurrent
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
Common stock -- $0.01 par value, 50,000,000 authorized, 27,969,783 and 27,710,776 issued; 27,525,365 and 27,393,045 outstanding at December 31, 2014 and December 31, 2013, respectively
Common Stock, Value, Issued
Treasury stock, 361,231 and 317,731 shares, at cost December 31, 2014 and December 31, 2013, respectively
Treasury Stock, Value
Additional paid-in capital
Additional Paid in Capital
Retained earnings
Retained Earnings (Accumulated Deficit)
Equity attributable to common stockholders
Stockholders' Equity Attributable to Parent
Noncontrolling interest
Stockholders' Equity Attributable to Noncontrolling Interest
Total stockholders’ equity
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest
Total liabilities and stockholders’ equity
Liabilities and Equity
Accounts receivable
Schedules of concentration of risk, by risk factor
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]
Schedule of recognized identified assets acquired and liabilities assumed
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]
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
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]
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
Granted (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross
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)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price
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)
December 31, 2014
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, 2014
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
Fair Value Disclosures [Abstract]
Fair Value Measurements, Recurring and Nonrecurring [Table]
Fair Value Measurements, Recurring and Nonrecurring [Table]
Measurement Frequency [Axis]
Measurement Frequency [Axis]
Fair Value, Measurement Frequency [Domain]
Fair Value, Measurement Frequency [Domain]
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Hierarchy [Axis]
Fair Value, Hierarchy [Axis]
Fair Value Hierarchy [Domain]
Fair Value Hierarchy [Domain]
Level 1
Fair Value, Inputs, Level 1 [Member]
Level II
Fair Value, Inputs, Level 2 [Member]
Level III
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]
Assets acquired in business combinations
Tangible Assets, Fair Value Disclosure
Tangible Assets, Fair Value Disclosure
Goodwill and other intangibles
Goodwill and Intangible Assets, Fair Value Disclosure
Goodwill and Intangible Assets, Fair Value Disclosure
Fair value of earnout liability
Contingent Consideration, Fair Value Disclosure
Contingent Consideration, Fair Value Disclosure
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]
Internal Revenue Service (IRS)
Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward
Operating Loss Carryforwards
Cash benefits received from operating loss carrybacks
Refunds Received from Application of Operating Loss Carrybacks
Refunds Received from Application of Operating Loss Carrybacks
Alternative minimum tax credits, non-expiring
Tax Credit Carryforward, Amount
Excess tax benefit from stock option exercise
Unrecognized Tax Benefits
Additional tax expense related to penalties and interest incurred
Income Tax Examination, Penalties and Interest Expense
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business and Basis of Presentation
Business Description and Basis of Presentation [Text Block]
Fair value measurement of fixed assets and goodwill on a non-recurring basis
Fair Value Measurements, Nonrecurring [Table 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]
Foreign Currencies
Foreign Currency Transactions and Translations 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]
New Accounting Pronouncements
New Accounting Pronouncements, Policy [Policy Text Block]
Business Acquisition
Business Combination Disclosure [Text Block]
Property, Plant and Equipment [Abstract]
Property and Equipment
Property, Plant and Equipment Disclosure [Text Block]
Schedule of future minimum rental payments for operating leases
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
Payables and Accruals [Abstract]
Schedule of accrued liabilities
Schedule of Accrued Liabilities [Table Text Block]
Summary of Significant Accounting Principles
Significant Accounting Policies [Text Block]
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, Issued
Common stock, shares outstanding
Common Stock, Shares, Outstanding
Treasury stock, shares
Treasury Stock, Shares
Fair Value
Fair Value Disclosures [Text Block]
Goodwill and Intangible Assets
Goodwill and Intangible Assets Disclosure [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]
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
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
Accrued Liabilities
Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block]
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
Fair Value Inputs, Discount Rate
Fair Value Inputs, Discount Rate
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount
Debt Disclosure [Abstract]
Long-term Debt and Line of Credit
Debt Disclosure [Text Block]
Depreciable lives of property and equipment
Property, Plant and Equipment [Table Text Block]
Defined Contribution Plan [Table]
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]
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
Employer matching contribution, percent of employee's gross pay
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay
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
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
Summary of property and equipment
Schedule of Property, Plant and Equipment [Table]
Property, Plant and Equipment [Table]
Significant Acquisitions and Disposals by Transaction [Axis]
Significant Acquisitions and Disposals by Transaction [Axis]
Significant Acquisitions and Disposals, Transaction [Domain]
Significant Acquisitions and Disposals, Transaction [Domain]
Purchase of the assets of West Construction
Purchase of the Assets of West Construction [Member]
Purchase of the Assets of West Construction [Member]
Depreciable Assets [Member]
Depreciable Assets [Member]
Automobiles and trucks
Building and improvements
Building and Building Improvements [Member]
Dredges and dredging equipment
Marine Services Equipment [Member]
Office equipment
Office Equipment [Member]
Construction in progress
Construction in Progress [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 and equipment, net
Depreciation expense
Depreciation
Purchase price of significant acquisitions during period
Significant Acquisitions and Disposals, Acquisition Costs or Sale Proceeds
Fixed assets increase due to acquisition
Property, Plant and Equipment, Additions
Impairment loss on assets held-for-sale
Impairment of Long-Lived Assets Held-for-use
Proceeds from sale of productive assets
Proceeds from Sale of Productive Assets
Statement of Stockholders' Equity [Abstract]
Equity Components [Axis]
Equity Components [Axis]
Equity Component [Domain]
Equity Component [Domain]
Common Stock
Common Stock [Member]
Treasury Stock
Treasury Stock [Member]
Additional Paid-In
Additional Paid-in Capital [Member]
Retained
Retained Earnings [Member]
Non-controlling Interest
Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, shares
Beginning balance
Beginning 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
Issue restricted stock
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures
Noncontrolling interest, acquired
Noncontrolling Interest, Increase from Business Combination
Distributions to noncontrolling interest
Proceeds from Noncontrolling Interests
Purchase of stock into treasury, shares
Treasury Stock, Shares, Acquired
Purchase of stock into treasury
Treasury Stock, Value, Acquired, Cost Method
Ending balance, shares
Ending balance
Ending treasury stock, shares
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
Finite-Lived Intangible Assets, Accumulated Amortization
Current year amortization
Amortization of Intangible Assets
Total accumulated amortization
Net intangible assets, end of year
Finite-Lived Intangible Assets, Net
Inventory Disclosure [Abstract]
Accrued Liabilities, Current [Abstract]
Accrued Liabilities, Current [Abstract]
Accrued salaries, wages and benefits
Employee-related Liabilities, Current
Accrual for self-insurance liabilities
Accrued Insurance, Current
Property taxes
Accrual for Taxes Other than Income Taxes, Current
Sales and Excise Tax Payable
Sales and Excise Tax Payable
Other accrued expenses
Other Accrued Liabilities, Current
Total accrued liabilities
Schedule II - Valuation and Qualifying Accounts
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
Stock-Based Compensation
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]
Equity [Abstract]
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 cost per share
Treasury Stock Acquired, Average Cost Per Share
Schedule of earnings per share, basic and diluted
Schedule of Weighted Average Number of Shares [Table Text Block]
Inventory
Inventory Disclosure [Text Block]
Statement of Cash Flows [Abstract]
Acquisition of business in Alaska
Acquisition of Business in Alaska [Member]
Acquisition of Business in Alaska [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
Cash flows from operating activities
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net income (loss)
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
Deferred Income Tax Expense (Benefit)
(Gain)/Loss on sale of property and equipment
Gain (Loss) on Disposition of Property Plant Equipment
Change in contingent liability related to earnout
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability
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
Note receivable
Increase (Decrease) in Notes Receivable, 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
Proceeds from Lines of Credit
Payments made on borrowings from Credit Facility
Repayments of Debt
Contributions from noncontrolling interest
Proceeds from (Payments to) Noncontrolling Interests
Exercise of stock options
Proceeds from Stock Options Exercised
Excess tax benefit from stock option exercise
Excess Tax Benefit from Share-based Compensation, Financing Activities
Increase in loan costs
Payments of Financing Costs
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 period
Cash and cash equivalents at end of period
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
Supplemental disclosure of non cash transaction:
Noncash Investing and Financing Items [Abstract]
Fair value of earnout from acquisition of business in Alaska
Other Noncash Expense
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]
Service Life
Service Life [Member]
Diluted (in dollars per share)
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
Net non-current deferred tax liabilities
Total net deferred tax liabilities:
Deferred Tax Liabilities, Net
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
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]
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
Fair value of equity compensation grants awarded
Compensation Arrangement with Individual, Fair Value of Shares Issued
Compensation Arrangement with Individual, Fair Value of Shares Issued
Grants awarded during period
Compensation Arrangement with Individual, Shares Issued
Compensation Arrangement with Individual, Shares Issued
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
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
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
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
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 current deferred tax assets
Net non-current deferred tax liabilities
Advertising Expense [Abstract]
Advertising Expense and Warranty Accrual [Abstract]
Advertising Expense and Warranty Accrual [Abstract]
Advertising expense
Advertising Expense
Income Statement [Abstract]
Costs of contract revenues
Contract Revenue Cost
Gross profit
Selling, general and administrative expenses
Selling, General and Administrative Expense
Operating income (loss)
Other income (expense):
Other Nonoperating Income (Expense) [Abstract]
Gain (loss) from sale of assets, net
Other income
Nonoperating Income (Expense)
Interest income
Interest Income, Deposits with Financial Institutions
Interest expense
Interest Expense
Other income (expense), net
Other Nonoperating Income (Expense)
Income tax expense (benefit)
Net income (loss)
Basic loss per share (in dollars per share)
Shares used to compute income (loss) per share
Basic (shares)
Diluted (shares)
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
Current Foreign Tax Expense (Benefit)
Current Foreign Tax Expense (Benefit)
Deferred Foreign Income Tax Expense (Benefit)
Deferred Foreign Income Tax Expense (Benefit)
Foreign Income Tax Expense (Benefit), Continuing Operations
Foreign Income Tax Expense (Benefit), Continuing Operations
Total Income Taxes
Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current
Current Income Tax Expense (Benefit)
Deferred
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]
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]
Selected Quarterly Financial Data
Quarterly Financial Information [Text Block]
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-term Debt Instruments [Table]
Credit Facility, Name [Axis]
Credit Facility, Name [Axis]
Credit Facility, Name [Axis]
Credit Facility Name [Domain]
Credit Facility Name [Domain]
Credit Facility Name [Domain]
Amended credit agreement
Amended Credit Agreement of 2012 [Member]
Amended Credit Agreement of 2012 [Member]
Line of Credit, Borrowing Capacity Base Components [Axis]
Line of Credit, Borrowing Capacity Base Components [Axis]
Line of Credit, Borrowing Capacity Base Components [Axis]
Line of Credit, Borrowing Capacity Base Components [Domain]
Line of Credit, Borrowing Capacity Base Components [Domain]
Line of Credit, Borrowing Capacity Base Components [Domain]
Eligible accounts receivable
Eligible Accounts Receivable [Member]
Eligible Accounts Receivable [Member]
Adjusted cash balance
Adjusted Cash Balance [Member]
Adjusted Cash Balance [Member]
Credit Facility, Loan Type [Axis]
Credit Facility, Loan Type [Axis]
Credit Facility, Loan Type [Axis]
Credit Facility, Loan Type [Domain]
Credit Facility, Loan Type [Domain]
Credit Facility, Loan Type [Domain]
Prime rate based Loans
Prime Rate Based Loans [Member]
Prime Rate Based Loans [Member]
Eurodollar Loans
Eurodollar Rate Loan [Member]
Eurodollar Rate Loan [Member]
Credit Facility [Axis]
Credit Facility [Axis]
Credit Facility [Domain]
Credit Facility [Domain]
Revolving Line of Credit [Member]
Revolving Credit Facility [Member]
Letter of credit
Letter of Credit [Member]
Swingline loan
Swingline Loan [Member]
Swingline Loan [Member]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Domain]
Long-term Debt, Type [Domain]
Secured debt
Secured Debt [Member]
Debt Instrument [Axis]
Debt Instrument [Axis]
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
Term Loan One [Member]
Term Loan One [Member]
Term Loan One [Member]
Term Loan Two [Member]
Term Loan Two [Member]
Term Loan Two [Member]
Revolving Credit Facility, Interest Rate Options [Axis]
Revolving Credit Facility, Interest Rate Options [Axis]
Revolving Credit Facility, Interest Rate Options [Axis]
Revolving Credit Facility, Interest Rate Options [Domain]
Revolving Credit Facility, Interest Rate Options [Domain]
Revolving Credit Facility, Interest Rate Options [Domain]
LIBOR
LIBOR [Member]
LIBOR [Member]
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity
Line of Credit Facility, Maximum Borrowing Capacity
Line of credit facility, current borrowing capacity
Line of Credit Facility, Current Borrowing Capacity
Line of credit facility, additional borrowing capacity
Line of Credit Facility, Additional Borrowing Capacity
Line of Credit Facility, Additional Borrowing Capacity
Line of credit facility, integral multiple of borrowings
Line of Credit Facility, Integral Multiple of Borrowings
Line of Credit Facility, Integral Multiple of Borrowings
Line of credit, current borrowing capacity base components
Line of Credit, Current Borrowing Capacity Base Components
Line of Credit, Current Borrowing Capacity Base Components
balance outstanding under revolver
balance outstanding under revolver
balance outstanding under revolver
Proceeds from credit facility
Letters of credit outstanding, amount
Letters of Credit Outstanding, Amount
Line of credit facility, revolving credit converted to 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
Debt Instrument, Face Amount
Debt Instrument, Face Amount
Debt instrument, periodic payment, principal
Debt Instrument, Periodic Payment, Principal
Debt Instrument, Periodic Payment
Debt Instrument, Periodic Payment
Debt Instrument, Interest Rate, Stated Percentage
Debt Instrument, Interest Rate, Stated Percentage
Fixed Charge Coverage Ratio
Fixed Charge Coverage Ratio
Fixed Charge Coverage Ratio
Leverage Ratio
Leverage Ratio
Leverage Ratio
Line of credit facility, unused capacity commitment fee percentage
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage
Debt instrument, description of variable rate basis
Debt Instrument, Description of Variable Rate Basis
Line of credit facility, interest rate at period end
Line of Credit Facility, Interest Rate at Period End
Line of credit facility, interest rate during period
Line of Credit Facility, Interest Rate During Period
Purchase of Common Shares
Treasury Stock [Text Block]
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]
Carrying (reported) amount, fair value disclosure
Reported Value Measurement [Member]
Debt Instrument, Fair Value Disclosure
Debt Instrument, Fair Value Disclosure
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
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 [Member]
Alaska Laborers Trust Fund [Member]
Alaska Laborers Trust Fund [Member]
Multiemployer Plans [Line Items]
Multiemployer Plans [Line Items]
Contributions
Multiemployer Plan, Period Contributions
Expiration of Collective Bargaining Agreement
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date