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Revenue From Contracts With Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | $ 400,038 | $ 264,086 | $ 696,726 | $ 488,035
Fixed-Unit Price |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 203,692 | 185,297 | 345,431 | 326,516
Lump Sum |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 147,460 | 43,666 | 261,712 | 82,798
Residential and Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 48,886 | 35,123 | 89,583 | 78,721
Heavy Civil |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 220,448 | 200,236 | 376,063 | 350,741
Heavy Civil | Heavy Highway |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 152,526 | 129,964 | 248,900 | 223,574
Heavy Civil | Aviation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 34,867 | 37,061 | 63,324 | 66,998
Heavy Civil | Water Containment and Treatment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 16,529 | 15,515 | 38,338 | 30,749
Heavy Civil | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 16,526 | 17,696 | 25,501 | 29,420
Specialty Services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 135,703 | 27,894 | 240,426 | 58,573
Specialty Services | Land Development |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 105,639 | 0 | 181,884 | 0
Specialty Services | Commercial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 30,064 | 27,894 | 58,542 | 58,573
Residential |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | $ 43,887 | $ 35,956 | $ 80,237 | $ 78,721

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130543-203045 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 924 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856 + Details
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