Accounting Policies [Abstract]
Reclassifications
Reclassification, 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]
New Accounting Pronouncements
New Accounting Pronouncements, Policy [Policy Text Block]
Earnings Per Share [Abstract]
Schedule of earnings per share, basic and diluted
Schedule of Weighted Average Number of Shares [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
Other
Other Receivables
Income taxes receivable
Income Taxes Receivable, Current
Note receivable
Notes, Loans and Financing Receivable, Net, Current
Inventory
Inventory, Net
Deferred tax asset
Deferred Tax Assets, Net, Current
Costs and estimated earnings in excess of billings on uncompleted contracts
Costs in Excess of Billings on Uncompleted Contracts or Programs Expected to be Collected within One Year
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
Accounts receivable, long-term
Accounts Receivable, Net, Noncurrent
Inventory, non-current
Inventory, Noncurrent
Goodwill
Goodwill
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
Billings in Excess of Cost, Current
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, 27,627,321 and 27,530,220 issued; 27,309,590 and 27,212,489 outstanding at June 30, 2013 and December 31, 2012, respectively
Common Stock, Value, Issued
Treasury stock, 317,731 shares, at cost
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
Payables and Accruals [Abstract]
Accrued Liabilities
Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block]
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
Accrual for self-insurance liabilities
Accrued Insurance, Current
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]
Major Customers [Axis]
Name of Major Customer [Domain]
Name of Major Customer [Domain]
U.S. Army Corps of Engineers
U.S. Army Corps of Engineers [Member]
U.S. Army Corps of Engineers [Member]
Private Sector Customer
Private Sector Customer [Member]
Private Sector Customer [Member]
Second Private Sector Customer
Second Private Sector Customer [Member]
Second Private Sector Customer [Member]
Local Port Authority
Canaveral Port Authority [Member]
Canaveral Port Authority [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]
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
Fair Value Disclosures [Abstract]
Fair Value
Fair Value Disclosures [Text Block]
Accounts receivable
Schedules of concentration of risk, by risk factor
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]
Contractors [Abstract]
Contracts in Progress
Long-term Contracts or Programs Disclosure [Text Block]
Noncontrolling Interest [Abstract]
Subsidiaries with Noncontrolling Owners' Interest
Noncontrolling Interest Disclosure [Text Block]
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
Common Stock, Shares, Issued
Treasury stock, shares
Treasury Stock, Shares
Stock-based compensation
Share-based Compensation
Exercise of stock options
Stock Issued During Period, Value, Stock Options Exercised
Contributions from non-controlling interest
Contributions from Noncontrolling Interests
Exercise of stock options, shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period
Net income (loss)
Net Income (Loss) Attributable to Parent
Net Income (Loss) Attributable to Noncontrolling Interest
Net Income (Loss) Attributable to Noncontrolling Interest
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Beginning
Balance, shares
Treasury stock, shares
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business and Basis of Presentation
Business Description and Basis of Presentation [Text Block]
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies
Commitments and Contingencies Disclosure [Text Block]
Income Tax Disclosure [Abstract]
Schedule of components of income tax expense (benefit)
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
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]
Effective income tax rate
Effective Income Tax Rate, Continuing Operations
Federal statutory tax rate
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate
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
Accounts Receivable [Abstract]
Receivables [Abstract]
Contract receivable retention
Accounts receivable, retention to be collected after 2012
Contract Receivable Retainage, Due after Next Twelve Months
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
Stock Options [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
Earnings Per Share
Earnings Per Share [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 outstanding
Common Stock, Shares, Outstanding
Treasury stock, shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]
Statement of Cash Flows [Abstract]
Business Acquisition [Axis]
Business Acquisition [Axis]
Business Acquisition, Acquiree [Domain]
Business Acquisition, Acquiree [Domain]
Cash flows from operating activities
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net loss
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest
Adjustments to reconcile net loss to net cash provided by (used in)
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 (recoveries)
Provision for Doubtful Accounts
Deferred income taxes
Deferred Income Tax Expense (Benefit)
Gain on sale of property and equipment
Gain (Loss) on Sale of Property Plant Equipment
Change in operating assets and liabilities:
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, net
Increase (Decrease) in Billing in Excess of Cost of Earnings
Deferred revenue
Deferred Revenue, Period Increase (Decrease)
Net cash provided by (used in) 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
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
Exercise of stock options
Proceeds from Stock Options Exercised
Increase in loan costs
Payments of Debt Issuance Costs
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
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 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
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
Schedule of accrued liabilities
Schedule of Accrued Liabilities [Table Text Block]
Schedule of Property, Plant and Equipment [Table]
Schedule of Property, Plant and Equipment [Table]
Property, Plant and Equipment, Type [Axis]
Property, Plant and Equipment, Type [Axis]
Property, Plant and Equipment, Type [Domain]
Property, Plant and Equipment, Type [Domain]
Equipment improvement
Equipment Improvement [Member]
Equipment Improvement [Member]
Automobiles and trucks
Vehicles [Member]
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]
Dry-docking capitalized costs
Dry-docking Capitalized Costs [Member]
Dry-docking Capitalized Costs [Member]
Range [Axis]
Range [Axis]
Range [Domain]
Range [Domain]
Minimum
Minimum [Member]
Maximum
Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment [Line Items]
Property and equipment useful life
Property, Plant and Equipment, Useful Life
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]
Summary of Significant Accounting Principles
Significant Accounting Policies [Text Block]
Concentration of Risk and Enterprise Wide Disclosures
Concentration Risk Disclosure [Text Block]
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill [Roll Forward]
Goodwill [Roll Forward]
Beginning balance, January 1
Additions
Goodwill, Acquired During Period
Ending balance
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
Depreciable lives of property and equipment
Property, Plant and Equipment [Table Text Block]
Debt Disclosure [Abstract]
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]
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
Long-term Debt, Fair Value
Long-term Debt, Fair Value
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
Debt instrument, periodic payment, principal
Debt Instrument, Periodic Payment, Principal
Line of credit facility, minimum net worth
Line of Credit Facility, Covenant Terms, Minimum Net Worth
Line of Credit Facility, Covenant Terms, Minimum Net Worth
Line of credit facility, covenant terms, minimum net worth, incremental amount to base amount, % of current quarter consolidated net income
Line of Credit Facility, Covenant Terms, Minimum Net Worth, Incremental Amount to Base Amount, Percentage of Current Quarter Consolidated Net Income
Line of Credit Facility, Covenant Terms, Minimum Net Worth, Incremental Amount to Base Amount, Percentage of Current Quarter Consolidated Net Income
Line of credit facility, covenant terms, minimum net worth, incremental amount to base amount, % of issuances of equity interests
Line of Credit Facility, Covenant Terms, Minimum Net Worth, Incremental Amount to Base Amount, Percentage of Issuances of Equity Interests
Line of Credit Facility, Covenant Terms, Minimum Net Worth, Incremental Amount to Base Amount, Percentage of Issuances of Equity Interests
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
Letters of credit outstanding, amount
Letters of Credit Outstanding, 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]
Schedule of future amortization expense of acquired finite-lived intangible assets
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
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 period
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 period
Finite-Lived Intangible Assets, Net
Property, Plant and Equipment [Abstract]
Property and Equipment
Property, Plant and Equipment Disclosure [Text Block]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Award Type [Axis]
Award Type [Axis]
Award Type [Domain]
Award Type [Domain]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
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
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
Compensation expense related to stock based awards outstanding
Allocated Share-based Compensation Expense
Options granted during period
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross
Fair value of options granted during period, per share
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value
Proceeds received upon exercise of stock options
Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options
Total unrecognized compensation expense
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized
Share-based compensation cost not yet recognized, period for recognition
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition
Long-term Debt and Line of Credit
Debt Disclosure [Text Block]
Operating Loss Carryforwards [Table]
Operating Loss Carryforwards [Line Items]
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
Total Income Taxes
Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current
Current Income Tax Expense (Benefit)
Deferred
Total
Income Tax Expense (Benefit), Continuing Operations
Inventory Disclosure [Abstract]
Goodwill and Intangible Assets
Goodwill and Intangible Assets Disclosure [Text Block]
Income Statement [Abstract]
Costs of contract revenues
Contract Revenue Cost
Gross profit (loss)
Gross Profit
Selling, general and administrative expenses
Selling, General and Administrative Expense
Income (loss) from operations
Operating Income (Loss)
Other income (expense)
Other Nonoperating Income (Expense) [Abstract]
(Loss) gain 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 benefit
Income Tax Expense (Benefit)
Net income (loss)
Net loss attributable to noncontrolling interest
Net income (loss)
Basic loss per share (in dollars per share)
Earnings Per Share, Basic
Diluted loss per share (in dollars per share)
Earnings Per Share, Diluted
Shares used to compute income (loss) per share
Basic (shares)
Diluted (shares)
Inventory
Inventory Disclosure [Text Block]
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
Other accrued expenses
Other Accrued Liabilities, Current
Total accrued liabilities
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]
Land
Land [Member]
Depreciable Assets [Member]
Depreciable Assets [Member]
Construction in progress
Construction in Progress [Member]
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
Summary of property and equipment
Fair Value Measurements, Recurring and Nonrecurring [Table]
Fair Value Measurements, Recurring and Nonrecurring [Table]
Secured Debt
West Construction, Inc.
West Construction, Inc. [Member]
West Construction, Inc. [Member]
Fair Value, by Balance Sheet Grouping, Disclosure Item Amounts [Axis]
Fair Value, by Balance Sheet Grouping, Disclosure Item Amounts [Axis]
Fair Value, Disclosure Item Amounts [Domain]
Fair Value, Disclosure Item Amounts [Domain]
Carrying (reported) amount, fair value disclosure
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Estimate of fair value, fair value disclosure
Estimate of Fair Value, Fair Value Disclosure [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]
Note receivable
Financing Receivable, Gross
Note receivable, interest rate
Note Receivable, Stated Interest Rate
Note Receivable, Stated Interest Rate
Fair value of earnout
Business Acquisition, Contingent Consideration, at Fair Value
Fair value of debt
Fair value measurement of fixed assets and goodwill on a non-recurring basis
Fair Value Measurements, Nonrecurring [Table Text Block]
Schedule of Indefinite-Lived Intangible Assets [Table]
Schedule of Indefinite-Lived Intangible Assets [Table]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2013
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months
2014
Finite-Lived Intangible Assets, Amortization Expense, Year Two
2015
Finite-Lived Intangible Assets, Amortization Expense, Year Three
Acquired intangible assets useful life
Finite-Lived Intangible Asset, Useful Life