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v3.20.1

Organization, Business and Basis of Presentation (Details) $ / shares in Units, $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2020 USD ($) segment $ / shares | Mar. 31, 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 | $ 0 |  |
Revenue recognized, related to change orders and claims included as contract price adjustments | 36,400 | 6,800 |  |
Increase (decrease) in operating income | 16,408 | 9,626 |  |
Increase (decrease) in net income | $ 9,932 | $ 7,353 |  |
Increase (decrease) in diluted earnings per common share (in dollars per share) | $ / shares | $ 0.59 | $ 0.44 |  |
Allowance for doubtful accounts associated with contract assets | $ 432 |  |  | $ 147
Cumulative-effect adjustment to retained earnings | (268) |  |  |
Retained Earnings [Member] |  |  |  |
Organization Consolidation and Presentation of Financial Statements [Line Items] |  |  |  |
Cumulative-effect adjustment to retained earnings | $ (268) |  |  |
Accounting Standards Update 2016-13 [Member] | Retained Earnings [Member] |  |  |  |
Organization Consolidation and Presentation of Financial Statements [Line Items] |  |  |  |
Cumulative-effect adjustment to retained earnings |  |  | $ (300) |
Contracts Accounted for under Percentage of Completion [Member] |  |  |  |
Organization Consolidation and Presentation of Financial Statements [Line Items] |  |  |  |
Increase (decrease) in consolidated gross margin | 0.10% | (0.80%) |  |
Increase (decrease) in operating income | $ 0 | $ (4,000) |  |
Increase (decrease) in net income | $ 0 | $ (1,500) |  |
Increase (decrease) in diluted earnings per common share (in dollars per share) | $ / shares | $ 0.00 | $ 0.09 |  |

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