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v3.21.2

Organization, Business and Basis of Presentation (Details) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 USD ($) $ / shares | Jun. 30, 2020 USD ($) $ / shares | Jun. 30, 2021 USD ($) segment $ / shares | Jun. 30, 2020 USD ($) $ / shares
Organization Consolidation and Presentation of Financial Statements [Line Items] |  |  |  |
Number of business segments (segment) | segment |  |  | 2 |
Capital contributions to joint venture | $ 0 |  | $ 0 |
Foreign currency gains (losses) |  |  | (100,000) | $ 0
Revenue recognized, related to change orders and claims included as contract price adjustments |  |  | 6,000,000.0 | 40,100,000
Increase (decrease) in operating income | 29,665,000 | $ 19,342,000 | 57,076,000 | 35,750,000
Increase (decrease) in net income | $ 21,219,000 | $ 13,385,000 | $ 41,147,000 | $ 23,317,000
Increase (decrease) in diluted earnings per common share (in dollars per share) | $ / shares | $ 1.24 | $ 0.80 | $ 2.41 | $ 1.39
Contracts Accounted for under Percentage of Completion |  |  |  |
Organization Consolidation and Presentation of Financial Statements [Line Items] |  |  |  |
Increase (decrease) in consolidated gross margin | 0.80% | 0.20% | 0.30% | (0.10%)
Increase (decrease) in operating income | $ 5,100,000 | $ 1,200,000 | $ 3,900,000 | $ (700,000)
Increase (decrease) in net income | $ 3,600,000 | $ 900,000 | $ 2,700,000 | $ (500,000)
Increase (decrease) in diluted earnings per common share (in dollars per share) | $ / shares | $ 0.21 | $ 0.05 | $ 0.16 | $ (0.03)
Huen Electric Inc |  |  |  |
Organization Consolidation and Presentation of Financial Statements [Line Items] |  |  |  |
Distributions to partners | $ 0 |  | $ 0 |

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