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v3.3.1.900

Organization, Business and Significant Accounting Policies (Details Textual) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Organization Consolidation and Presentation of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating Income (Loss) |  |  |  |  |  |  |  |  | $ 44,841 | $ 58,404 | $ 55,617
Net Income (Loss) Attributable to Parent | $ 5,881 | $ 6,175 | $ 8,074 | $ 7,172 | $ 14,127 | $ 8,404 | $ 7,741 | $ 6,272 | $ 27,302 | $ 36,544 | $ 34,759
Earnings Per Share, Diluted | $ 0.29 | $ 0.29 | $ 0.38 | $ 0.34 | $ 0.66 | $ 0.39 | $ 0.36 | $ 0.29 | $ 1.30 | $ 1.69 | $ 1.61
Advertising Expense |  |  |  |  |  |  |  |  | $ 500 | $ 400 | $ 300
Percentage Of Retainage Recorded And Collected Within One Year |  |  |  |  |  |  |  |  | 90.00% |  |
Loss Contingency Insurance Policy Deductible for Each Line of Coverage Excluding Health | $ 1,000 |  |  |  |  |  |  |  | $ 1,000 |  |
Loss Contingency Health Insurance Deductible For Qualified Individuals | $ 100 |  |  |  |  |  |  |  | 100 |  |
Foreign Currency Transaction Gain (Loss), Realized |  |  |  |  |  |  |  |  | 300 |  |
Additional Paid-in Capital [Member] |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation and Presentation of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Income (Loss) Attributable to Parent |  |  |  |  |  |  |  |  | 0 | 0 | 0
Prior Period Reclassification Adjustment |  |  |  |  |  |  |  |  | 14,000 |  |
Retained Earnings [Member] |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation and Presentation of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Income (Loss) Attributable to Parent |  |  |  |  |  |  |  |  | 27,302 | $ 36,544 | $ 34,759
Prior Period Reclassification Adjustment |  |  |  |  |  |  |  |  | $ 14,000 |  |
Accounts Receivable [Member] | Number of Customers [Member] |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation and Presentation of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  |  |  |  |  | 10.00% | 10.00% |
Accounts Receivable [Member] | Number of Customers [Member] | Credit Concentration Risk [Member] |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation and Presentation of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  |  |  |  |  | 13.00% | 14.20% |
Number Of Customers Individually Exceeding Ten Percent Consolidated Accounts Receivable |  |  |  |  |  |  |  |  | 1 | 1 |
Revenues [Member] | Number of Customers [Member] | Customer concentration risk [Member] |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation and Presentation of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  |  |  |  |  | 10.00% | 10.00% | 10.00%
Revenues [Member] | Top Ten Customers [Member] | Customer concentration risk [Member] |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation and Presentation of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  |  |  |  |  | 44.60% | 46.50% | 57.80%
Labor employees covered by collective bargaining agreements [Member] | Labor Force Concentration Risk [Member] |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation and Presentation of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  |  |  |  |  | 91.00% |  |
Contracts Accounted for under Percentage of Completion [Member] | Cost Estimate Revision [Member] |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation and Presentation of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |
Cost Estimate Revision Gross Margin Increase Percentage |  |  |  |  |  |  |  |  | 0.50% | 1.90% | 0.80%
Estimate Adjustment [Member] |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation and Presentation of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating Income (Loss) |  |  |  |  |  |  |  |  | $ 5,900 | $ 18,400 | $ 7,700
Net Income (Loss) Attributable to Parent |  |  |  |  |  |  |  |  | $ 3,600 | $ 11,600 | $ 4,900
Earnings Per Share, Diluted |  |  |  |  |  |  |  |  | $ 0.17 | $ 0.54 | $ 0.23

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