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DETAIL OF CERTAIN BALANCE SHEET ACCOUNTS | 12 Months Ended
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Dec. 31, 2012
DETAIL OF CERTAIN BALANCE SHEET ACCOUNTS |
8. | DETAIL OF CERTAIN BALANCE SHEET ACCOUNTS:
Activity in Quanta’s current and long-term allowance for doubtful accounts consists of the following (in thousands):
|  | December 31, |
|  | 2012 |  |  | 2011 |
Balance at beginning of year |  | $ | 3,751 |  |  | $ | 5962 |
Charged to expense |  |  | 3,693 |  |  |  | 1,163 |
Deductions for uncollectible receivables written off, net of recoveries |  |  | (1,997 | ) |  |  | (3,374 | )
Balance at end of year |  | $ | 5,447 |  |  | $ | 3,751 |
Contracts in progress are as follows (in thousands):
|  | December 31, |
|  | 2012 |  |  | 2011 |
Costs incurred on contracts in progress |  | $ | 3,744,337 |  |  | $ | 2,257,719 |
Estimated earnings, net of estimated losses |  |  | 612,000 |  |  |  | 270,113 |
|  |  | 4,356,337 |  |  |  | 2,527,832 |
Less — Billings to date |  |  | (4,187,445 | ) |  |  | (2,483,264 | )
|  | $ | 168,892 |  |  | $ | 44,568 |
Costs and estimated earnings in excess of billings on uncompleted contracts |  | $ | 342,777 |  |  | $ | 189,167 |
Less — Billings in excess of costs and estimated earnings on uncompleted contracts |  |  | (173,885 | ) |  |  | (144,599 | )
|  | $ | 168,892 |  |  | $ | 44,568 |
Property and equipment consists of the following (in thousands):
|  | Estimated Useful Lives in Years |  |  | December 31, |
|  | 2012 |  |  | 2011 |
Land |  |  | N/A |  |  | $ | 16,101 |  |  | $ | 15,759 |
Buildings and leasehold improvements |  |  | 5-30 |  |  |  | 59,818 |  |  |  | 50,457 |
Operating equipment and vehicles |  |  | 5-25 |  |  |  | 1,045,248 |  |  |  | 917,269 |
Fiber optic and related assets |  |  | 5-20 |  |  |  | 350,521 |  |  |  | 319,303 |
Office equipment, furniture and fixtures and information technology systems |  |  | 3-15 |  |  |  | 95,779 |  |  |  | 81,282 |
Construction work in progress |  |  | N/A |  |  |  | 33,546 |  |  |  | 29,502 |
|  |  |  |  |  |  | 1,601,013 |  |  |  | 1,413,572 |
Less — Accumulated depreciation and amortization |  |  |  |  |  |  | (555,030 | ) |  |  | (474,670 | )
Property and equipment, net |  |  |  |  |  | $ | 1,045,983 |  |  | $ | 938,902 |
Accounts payable and accrued expenses consists of the following (in thousands):
|  | December 31, |
|  | 2012 |  |  | 2011 |
Accounts payable, trade |  | $ | 373,947 |  |  | $ | 316,525 |
Accrued compensation and related expenses |  |  | 111,688 |  |  |  | 97,779 |
Accrued insurance, current portion |  |  | 44,503 |  |  |  | 48,388 |
Accrued loss on contracts |  |  | 4,770 |  |  |  | 2,771 |
Deferred revenues, current portion |  |  | 22,499 |  |  |  | 15,052 |
Income and franchise taxes payable |  |  | 85,663 |  |  |  | 47,703 |
Other accrued expenses |  |  | 64,215 |  |  |  | 42,354 |
|  | $ | 707,285 |  |  | $ | 570,572 |

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- Definition Detail of certain balance sheet accounts. + References No definition available. + Details
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