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Supplemental Cash Flow Information | 6 Months Ended
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Jun. 30, 2017
Supplemental Cash Flow Elements [Abstract] |
Supplemental Cash Flow Information | SUPPLEMENTAL CASH FLOW INFORMATION: The net effect of changes in operating assets and liabilities, net of non-cash transactions, on cash flows from operating activities of continuing operations is as follows (in thousands):
| Three Months Ended |  | Six Months Ended
| June 30, |  | June 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
Accounts and notes receivable | $ | (31,605 | ) |  | $ | 105,399 |  |  | $ | (126,443 | ) |  | $ | 264,394 |
Costs and estimated earnings in excess of billings on uncompleted contracts | (67,270 | ) |  | (82,456 | ) |  | (147,980 | ) |  | (134,923 | )
Inventories | (3,529 | ) |  | (2,256 | ) |  | (4,798 | ) |  | 2,281 |
Prepaid expenses and other current assets | (29,355 | ) |  | (13,513 | ) |  | (33,637 | ) |  | (11,687 | )
Accounts payable and accrued expenses and other non-current liabilities | (55,848 | ) |  | 33,968 |  |  | 13,641 |  |  | 10,324 |
Billings in excess of costs and estimated earnings on uncompleted contracts | 48,020 |  |  | (48,465 | ) |  | 36,206 |  |  | (12,527 | )
Other, net | 12,624 |  |  | 3,875 |  |  | 18,842 |  |  | (999 | )
Net change in operating assets and liabilities, net of non-cash transactions | $ | (126,963 | ) |  | $ | (3,448 | ) |  | $ | (244,169 | ) |  | $ | 116,863 |
Additional supplemental cash flow information is as follows (in thousands):
| Three Months Ended |  | Six Months Ended
| June 30, |  | June 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
Cash (paid) received during the period for — |  |  |  |  |  |  |  |  |
Interest paid related to continuing operations | $ | (4,044 | ) |  | $ | (3,066 | ) |  | $ | (7,506 | ) |  | $ | (5,507 | )
Income taxes paid related to continuing operations | $ | (93,279 | ) |  | $ | (27,038 | ) |  | $ | (101,496 | ) |  | $ | (33,524 | )
Income taxes paid related to discontinued operations | $ | — |  |  | $ | (437 | ) |  | $ | — |  |  | $ | (6,080 | )
Income tax refunds related to continuing operations | $ | 463 |  |  | $ | 785 |  |  | $ | 2,669 |  |  | $ | 1,679 |
During the three months ended June 30, 2017, Quanta entered into a non-cash transaction whereby Quanta accepted title to a marine vessel in satisfaction and discharge of a $7.1 million note receivable.

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- Definition The entire disclosure for supplemental cash flow activities, including cash, noncash, and part noncash transactions, for the period. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 + Details
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