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v3.19.1

Organization, Business and Basis of Presentation - Narrative (Details) $ / shares in Units, $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 USD ($) segment $ / shares | Mar. 31, 2018 USD ($) $ / shares | Dec. 31, 2018 USD ($)
Organization Consolidation and Presentation of Financial Statements [Line Items] |  |  |
Number of business segments (segment) | segment | 2 |  |
Checks issued and outstanding in excess of bank balance | $ 8,400 |  | $ 0
Increase (decrease) in operating income | 9,626 | $ 8,407 |
Increase (decrease) in net income | $ 7,353 | $ 5,644 |
Increase (decrease) in diluted earnings per common share (in dollars per share) | $ / shares | $ 0.44 | $ 0.34 |
Contract with customer, liability, cumulative catch-up adjustment to revenue, change in estimate of transaction price | $ 6,800 | $ 16,100 |
Contracts Accounted for under Percentage of Completion [Member] |  |  |
Organization Consolidation and Presentation of Financial Statements [Line Items] |  |  |
Increase (decrease) in consolidated gross margin | (0.80%) | (0.10%) |
Increase (decrease) in operating income | $ (4,000) | $ (300) |
Increase (decrease) in net income | $ (1,500) | $ (200) |
Increase (decrease) in diluted earnings per common share (in dollars per share) | $ / shares | $ (0.09) | $ (0.01) |

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