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v3.20.2

Organization, Business and Basis of Presentation (Details) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2020 USD ($) $ / shares | Jun. 30, 2019 USD ($) $ / shares | Jun. 30, 2020 USD ($) segment $ / shares | Jun. 30, 2019 USD ($) $ / shares | Jan. 01, 2020 USD ($) | Dec. 31, 2019 USD ($)
Organization Consolidation and Presentation of Financial Statements [Line Items] |  |  |  |  |  |
Number of business segments (segment) | segment |  |  | 2 |  |  |
Foreign currency gains |  |  | $ 0 | $ 100 |  |
Revenue recognized, related to change orders and claims included as contract price adjustments |  |  | 40,100 | 21,400 |  |
Increase (decrease) in operating income | $ 19,342 | $ 9,410 | 35,750 | 19,036 |  |
Increase (decrease) in net income | $ 13,385 | $ 7,207 | $ 23,317 | $ 14,560 |  |
Increase (decrease) in diluted earnings per common share (in dollars per share) | $ / shares | $ 0.80 | $ 0.43 | $ 1.39 | $ 0.87 |  |
Allowance for doubtful accounts associated with contract assets | $ 393 |  | $ 393 |  |  | $ 147
Retained Earnings (Accumulated Deficit) | $ 235,083 |  | $ 235,083 |  |  | $ 212,219
Accounting Standards Update 2016-13 [Member] | Adjustment |  |  |  |  |  |
Organization Consolidation and Presentation of Financial Statements [Line Items] |  |  |  |  |  |
Retained Earnings (Accumulated Deficit) |  |  |  |  | $ (268) |
Contracts Accounted for under Percentage of Completion [Member] |  |  |  |  |  |
Organization Consolidation and Presentation of Financial Statements [Line Items] |  |  |  |  |  |
Increase (decrease) in consolidated gross margin | 0.20% | (0.90%) | (0.10%) | (1.00%) |  |
Increase (decrease) in operating income | $ 1,200 | $ (4,200) | $ (700) | $ (9,100) |  |
Increase (decrease) in net income | $ 900 | $ (1,900) | $ (500) | $ (4,200) |  |
Increase (decrease) in diluted earnings per common share (in dollars per share) | $ / shares | $ 0.05 | $ (0.11) | $ (0.03) | $ (0.25) |  |

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