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Detail of Certain Balance Sheet Accounts - Property and Equipment (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Property, Plant and Equipment [Line Items] |  |
Finance lease assets and rental purchase options (see Note 9) | $ 52,160 | $ 14,162
Property and equipment, gross | 2,932,788 | 2,636,851
Less — Accumulated depreciation and amortization | (1,372,132) | (1,250,197)
Property and equipment, net of accumulated depreciation | 1,560,656 | 1,386,654
Land |  |
Property, Plant and Equipment [Line Items] |  |
Property and equipment, gross | 69,389 | 67,560
Buildings and leasehold improvements |  |
Property, Plant and Equipment [Line Items] |  |
Property and equipment, gross | $ 249,106 | $ 231,920
Buildings and leasehold improvements | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful lives | 5 years | 5 years
Buildings and leasehold improvements | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful lives | 30 years | 30 years
Operating equipment and vehicles |  |
Property, Plant and Equipment [Line Items] |  |
Property and equipment, gross | $ 2,297,120 | $ 2,068,644
Operating equipment and vehicles | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful lives | 1 year | 1 year
Operating equipment and vehicles | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful lives | 25 years | 25 years
Office equipment, furniture and fixtures and information technology systems |  |
Property, Plant and Equipment [Line Items] |  |
Property and equipment, gross | $ 244,113 | $ 228,329
Office equipment, furniture and fixtures and information technology systems | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful lives | 3 years | 3 years
Office equipment, furniture and fixtures and information technology systems | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful lives | 10 years | 10 years
Construction work in progress |  |
Property, Plant and Equipment [Line Items] |  |
Property and equipment, gross | $ 20,900 | $ 26,236
Finance lease assets and rental purchase options | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful lives | 5 years | 5 years
Finance lease assets and rental purchase options | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful lives | 20 years | 20 years

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- Definition Amount, before accumulated amortization, of right-of-use asset from finance lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977 + Details
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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, after accumulated depreciation and amortization, of property, plant, and equipment and finance lease right-of-use asset. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -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 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 3: 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 + 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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