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v3.20.4

Property and Equipment - Summary of Property and Equipment (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019
Property, Plant and Equipment [Line Items] |  |
Total property and equipment, gross | $ 479,480 | $ 458,209
Less: accumulated depreciation and amortization | (294,366) | (272,865)
Property and equipment, net | 185,114 | 185,344
Land |  |
Property, Plant and Equipment [Line Items] |  |
Total property and equipment, gross | 9,301 | 9,301
Buildings and improvements |  |
Property, Plant and Equipment [Line Items] |  |
Total property and equipment, gross | 33,452 | 29,747
Construction equipment |  |
Property, Plant and Equipment [Line Items] |  |
Construction equipment | 420,002 | 403,217
Office equipment |  |
Property, Plant and Equipment [Line Items] |  |
Total property and equipment, gross | $ 16,725 | $ 15,944
Minimum | Buildings and improvements |  |
Property, Plant and Equipment [Line Items] |  |
Estimated Useful Life in Years | 3 years |
Minimum | Construction equipment |  |
Property, Plant and Equipment [Line Items] |  |
Estimated Useful Life in Years | 3 years |
Minimum | Office equipment |  |
Property, Plant and Equipment [Line Items] |  |
Estimated Useful Life in Years | 3 years |
Maximum | Buildings and improvements |  |
Property, Plant and Equipment [Line Items] |  |
Estimated Useful Life in Years | 39 years |
Maximum | Construction equipment |  |
Property, Plant and Equipment [Line Items] |  |
Estimated Useful Life in Years | 12 years |
Maximum | Office equipment |  |
Property, Plant and Equipment [Line Items] |  |
Estimated Useful Life in Years | 10 years |

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- Definition Amount of accumulated depreciation and amortization from plant, property, and equipment and right-of-use asset from finance lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918638-209977 + Details
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- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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