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Revenue, Contract Assets and Liabilities and Other Contract Matters - Summary of Contract with Customer, Asset and Liability (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
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Revenue From Contract With Customer [Abstract] |  |
Costs incurred on uncompleted contracts | $ 386,932 | $ 256,239
Estimated loss incurred to date | (48,895) | (35,470)
Sub-total | 338,037 | 220,769
Billings to date | (295,136) | (190,588)
Deferred revenue | (4,592) | (4,592)
Total | 38,309 | 25,589
Contract assets | 52,128 | 29,982
Contract liabilities | (26,271) | (16,845)
Sub-total | 25,857 | 13,137
Contract assets, noncurrent | $ 12,452 | $ 12,452

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- Definition Amount, before 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/2009/role/commonPracticeRef -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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- 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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