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Detail of Certain Balance Sheet Accounts (Tables) | 12 Months Ended
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Dec. 31, 2016
Text Block [Abstract] |
Current and Long-Term Allowance for Doubtful Accounts | Activity in Quanta’s current and long-term allowance for doubtful accounts consisted of the following (in thousands):
|  | December 31, |
|  | 2016 |  |  | 2015 |
Balance at beginning of year |  | $ | 5,226 |  |  | $ | 6,174 |
Charged to bad debt expense (recoveries of bad debt expense) |  |  | (543 | ) |  |  | 224 |
Deductions for uncollectible receivables written off, net of recoveries |  |  | (1,931 | ) |  |  | (1,172 | )
Balance at end of year |  | $ | 2,752 |  |  | $ | 5,226 |
Contracts in Progress | Contracts in progress were as follows (in thousands):
|  | December 31, |
|  | 2016 |  |  | 2015 |
Costs incurred on contracts in progress |  | $ | 6,687,484 |  |  | $ | 5,725,078 |
Estimated earnings, net of estimated losses |  |  | 766,560 |  |  |  | 756,974 |
|  |  | 7,454,044 |  |  |  | 6,482,052 |
Less — Billings to date |  |  | (7,255,582 | ) |  |  | (6,563,537 | )
|  | $ | 198,462 |  |  | $ | (81,485 | )
Costs and estimated earnings in excess of billings on uncompleted contracts |  | $ | 473,308 |  |  | $ | 317,745 |
Less — Billings in excess of costs and estimated earnings on uncompleted contracts |  |  | (274,846 | ) |  |  | (399,230 | )
|  | $ | 198,462 |  |  | $ | (81,485 | )
Property and Equipment | Property and equipment consisted of the following (in thousands):
|  | Estimated Useful Lives in Years |  |  | December 31, |
|  | 2016 |  |  | 2015 |
Land |  |  | N/A |  |  | $ | 45,919 |  |  | $ | 41,428 |
Buildings and leasehold improvements |  |  | 5-30 |  |  |  | 137,515 |  |  |  | 116,697 |
Operating equipment and vehicles |  |  | 5-25 |  |  |  | 1,634,850 |  |  |  | 1,517,630 |
Office equipment, furniture and fixtures and information technology systems |  |  | 3-10 |  |  |  | 145,174 |  |  |  | 137,670 |
Construction work in progress |  |  | N/A |  |  |  | 73,461 |  |  |  | 43,806 |
|  |  |  |  |  |  | 2,036,919 |  |  |  | 1,857,231 |
Less — Accumulated depreciation and amortization |  |  |  |  |  |  | (862,825 | ) |  |  | (755,272 | )
Property and equipment, net |  |  |  |  |  | $ | 1,174,094 |  |  | $ | 1,101,959 |
Accounts Payable and Accrued Expenses | Accounts payable and accrued expenses consisted of the following (in thousands):
|  | December 31, |
|  | 2016 |  |  | 2015 |
Accounts payable, trade |  | $ | 529,608 |  |  | $ | 452,295 |
Accrued compensation and related expenses |  |  | 194,056 |  |  |  | 159,045 |
Accrued insurance, current portion |  |  | 60,880 |  |  |  | 61,327 |
Deferred revenues, current portion |  |  | 15,512 |  |  |  | 8,010 |
Income and franchise taxes payable |  |  | 40,765 |  |  |  | 3,923 |
Other accrued expenses |  |  | 81,998 |  |  |  | 97,534 |
|  | $ | 922,819 |  |  | $ | 782,134 |

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