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Detail of Certain Balance Sheet Accounts | 12 Months Ended
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Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Detail of Certain Balance Sheet Accounts | DETAIL OF CERTAIN BALANCE SHEET ACCOUNTS: Property and equipment consisted of the following (in thousands):
| Estimated Useful |  | December 31,
| Lives in Years |  | 2020 |  | 2019
Land | N/A |  | $ | 69,389 |  |  | $ | 67,560 |
Buildings and leasehold improvements | 5-30 |  | 249,106 |  |  | 231,920 |
Operating equipment and vehicles | 1-25 |  | 2,297,120 |  |  | 2,068,644 |
Office equipment, furniture and fixtures and information technology systems | 3-10 |  | 244,113 |  |  | 228,329 |
Construction work in progress | N/A |  | 20,900 |  |  | 26,236 |
Finance lease assets and rental purchase options (see Note 9) | 5-20 |  | 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 |
Other assets, net consisted of the following (in thousands):
|  | December 31,
|  | 2020 |  | 2019
Receivable related to terminated telecommunications project in Peru |  | $ | 119,648 |  |  | $ | 119,648 |
Long-term retainage receivable, net |  | 88,234 |  |  | 54,235 |
Investments in unconsolidated affiliates |  | 84,367 |  |  | 89,568 |
Investments held related to deferred compensation plan |  | 55,855 |  |  | 45,273 |
Long-term insurance receivables |  | 35,164 |  |  | 34,785 |
Deferred tax assets |  | 17,685 |  |  | 12,545 |
Long-term accounts receivable, net |  | 13,367 |  |  | 12,427 |
Deferred financing costs related to senior credit facility, net |  | 9,695 |  |  | 6,695 |
Other non-current assets |  | 11,698 |  |  | 18,088 |
Other assets, net |  | $ | 435,713 |  |  | $ | 393,264 |
Accounts payable and accrued expenses consisted of the following (in thousands):
|  | December 31,
|  | 2020 |  | 2019
Accounts payable, trade |  | $ | 798,023 |  |  | $ | 798,718 |
Accrued compensation and related expenses |  | 378,002 |  |  | 316,237 |
Accrued insurance, current portion |  | 80,926 |  |  | 69,307 |
Income and franchise taxes payable |  | 32,315 |  |  | 58,353 |
Unearned revenues, current portion |  | 53,562 |  |  | 33,192 |
Sales and use taxes payable |  | 30,587 |  |  | 28,721 |
Contingent consideration liabilities, current portion |  | 3,466 |  |  | 77,618 |
Other accrued expenses |  | 132,913 |  |  | 107,413 |
Accounts payable and accrued expenses |  | $ | 1,509,794 |  |  | $ | 1,489,559 |

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