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Costs and Estimated Earnings on Uncompleted Contracts (Summary of Costs and Estimated Earnings on Uncompleted Contracts) (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
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Costs and Estimated Earnings on Uncompleted Contracts [Abstract] |  |
Costs incurred on uncompleted contracts | $ 62,753 | $ 54,949
Estimated earnings | 25,149 | 21,778
Billings to date | (51,333) | (43,725)
Costs and estimated earnings on uncompleted contracts | $ 36,569 | $ 33,002

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- Definition Contract with Customer, Estimated Earnings + References No definition available. + Details
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- Definition Contract with Customer, Net Asset (Liability) + References No definition available. + Details
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- Definition Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131252-203054 + Details
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