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Contracts in Progress | 3 Months Ended
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Mar. 31, 2021
Contract With Customer Asset And Liability [Abstract] |
Contracts in Progress | 6. Contracts in Progress The following table reflects the calculation of the net balance of contract assets and contract liabilities. Costs and estimated earnings on contracts in progress consist of the following (in thousands):
|  | March 31, 2021 |  |  | December 31, 2020 |
Costs incurred on uncompleted contracts |  | $ | 123,572 |  |  | $ | 113,856 |
Estimated contract earnings in excess of costs |  |  | 165,405 |  |  |  | 151,423 |
Estimated contract earnings to date |  |  | 288,977 |  |  |  | 265,279 |
Less: billed to date |  |  | (283,526 | ) |  |  | (260,142 | )
Net contract assets |  | $ | 5,451 |  |  | $ | 5,137 |

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