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Income Taxes | 12 Months Ended
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Dec. 31, 2016
Income Tax Disclosure [Abstract] |
Income Taxes |
10. | INCOME TAXES:
The components of income (loss) from continuing operations before income taxes were as follows (in thousands):
|  | Year Ended December 31, |
|  | 2016 |  |  | 2015 |  |  | 2014 |
Income (loss) from continuing operations before income taxes: |  |  |  |  |  |  |  |  |  |  |  |
Domestic |  | $ | 349,959 |  |  | $ | 244,955 |  |  | $ | 263,357 |
Foreign |  |  | (42,273 | ) |  |  | (16,280 | ) |  |  | 163,242 |
Total |  | $ | 307,686 |  |  | $ | 228,675 |  |  | $ | 426,599 |
The components of the provision for income taxes for continuing operations were as follows (in thousands):
|  | Year Ended December 31, |
|  | 2016 |  |  | 2015 |  |  | 2014 |
Current: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  | $ | 106,316 |  |  | $ | 85,830 |  |  | $ | 67,430 |
State |  |  | 11,549 |  |  |  | 9,783 |  |  |  | 8,693 |
Foreign |  |  | 5,076 |  |  |  | 21,262 |  |  |  | 39,978 |
Total current tax provision |  |  | 122,941 |  |  |  | 116,875 |  |  |  | 116,101 |
Deferred: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  | (264 | ) |  |  | (5,247 | ) |  |  | 11,507 |
State |  |  | (923 | ) |  |  | 917 |  |  |  | 2,232 |
Foreign |  |  | (14,508 | ) |  |  | (15,073 | ) |  |  | 9,167 |
Total deferred tax provision (benefit) |  |  | (15,695 | ) |  |  | (19,403 | ) |  |  | 22,906 |
Total provision for income taxes from continuing operations |  | $ | 107,246 |  |  | $ | 97,472 |  |  | $ | 139,007 |
The actual income tax provision differed from the income tax provision computed by applying the U.S. federal statutory corporate rate to income from continuing operations before provision for income taxes as follows (in thousands):
|  | Year Ended December 31, |
|  | 2016 |  |  | 2015 |  |  | 2014 |
Provision at the statutory rate |  | $ | 107,690 |  |  | $ | 80,036 |  |  | $ | 149,697 |
Increases (decreases) resulting from — |  |  |  |  |  |  |  |  |  |  |  |
State taxes |  |  | 6,479 |  |  |  | 7,241 |  |  |  | 7,890 |
Foreign taxes |  |  | 1,860 |  |  |  | 1,239 |  |  |  | (13,059 | )
Contingency reserves, net |  |  | (13,540 | ) |  |  | 4,438 |  |  |  | (650 | )
Production activity deduction |  |  | (8,586 | ) |  |  | (6,871 | ) |  |  | (6,033 | )
Employee per diems, meals and entertainment |  |  | 8,764 |  |  |  | 8,727 |  |  |  | 9,817 |
Taxes on unincorporated joint ventures |  |  | (656 | ) |  |  | (3,838 | ) |  |  | (6,429 | )
Asset impairments |  |  | 1,909 |  |  |  | 7,047 |  |  |  | — |
Other |  |  | 3,326 |  |  |  | (547 | ) |  |  | (2,226 | )
Total provision for income taxes from continuing operations |  | $ | 107,246 |  |  | $ | 97,472 |  |  | $ | 139,007 |
Deferred income taxes result from temporary differences in the recognition of income and expenses for financial reporting purposes and tax purposes. The tax effects of these temporary differences, representing deferred tax assets and liabilities, result principally from the following (in thousands):
|  | December 31, |
|  | 2016 |  |  | 2015 |
Deferred income tax liabilities: |  |  |  |  |  |  |  |
Property and equipment |  | $ | (214,902 | ) |  | $ | (189,793 | )
Goodwill |  |  | (83,097 | ) |  |  | (69,059 | )
Other intangibles |  |  | (33,566 | ) |  |  | (36,565 | )
Other book/tax accounting method differences |  |  | (41,241 | ) |  |  | (61,095 | )
Total deferred income tax liabilities |  |  | (372,806 | ) |  |  | (356,512 | )
Deferred income tax assets: |  |  |  |  |  |  |  |
Accruals and reserves |  |  | 21,681 |  |  |  | 25,070 |
Accrued insurance |  |  | 79,630 |  |  |  | 75,591 |
Stock and incentive compensation and pension withdrawal liabilities |  |  | 58,744 |  |  |  | 52,009 |
Net operating loss carryforwards |  |  | 37,362 |  |  |  | 27,255 |
Other |  |  | 7,546 |  |  |  | 10,894 |
Subtotal |  |  | 204,963 |  |  |  | 190,819 |
Valuation allowance |  |  | (14,991 | ) |  |  | (16,141 | )
Total deferred income tax assets |  |  | 189,972 |  |  |  | 174,678 |
Total net deferred income tax liabilities |  | $ | (182,834 | ) |  | $ | (181,834 | )
The net deferred income tax assets and liabilities were comprised of the following (in thousands):
|  | December 31, |
|  | 2016 |  |  | 2015 |
Deferred income taxes: |  |  |  |  |  |  |  |
Assets |  | $ | 10,000 |  |  | $ | 4,657 |
Liabilities |  |  | (192,834 | ) |  |  | (186,491 | )
Total net deferred income tax liabilities |  | $ | (182,834 | ) |  | $ | (181,834 | )
The valuation allowance for deferred income tax assets at December 31, 2016, 2015 and 2014 was $15.0 million, $16.1 million and $13.0 million, respectively. These valuation allowances relate to foreign net operating loss carryforwards, state net operating loss carryforwards and foreign tax credit carryforwards. The net change in the total valuation allowance for each of the years ended December 31, 2016, 2015 and 2014 was a decrease of $1.1 million, an increase of $3.1 million and a decrease of $0.3 million, respectively. The valuation allowance was established primarily as a result of uncertainty in Quanta’s outlook as to future taxable income in particular tax jurisdictions. Quanta believes it is more likely than not that it will realize the benefit of its deferred tax assets net of existing valuation allowances. At December 31, 2016, Quanta had state and foreign net operating loss carryforwards, the tax effect of which was approximately $40.2 million. These carryforwards will expire as follows: 2017, $0.7 million; 2018, $0.4 million; 2019, $0.8 million; 2020, $0.5 million; 2021, $0.5 million and $37.3 million thereafter. A valuation allowance of $12.6 million has been recorded against certain foreign and state net operating loss carryforwards. Through December 31, 2016, Quanta has not provided U.S. income taxes on approximately $298.8 million of unremitted foreign earnings. If Quanta was to repatriate cash that is indefinitely reinvested outside the U.S., it could be subject to additional U.S income and foreign withholding taxes. Because of the number and variability of assumptions required, it is not practicable to determine the amount of any additional U.S. tax liability that may result if Quanta decides to no longer indefinitely reinvest foreign earnings outside the U.S. If Quanta’s intentions or U.S. tax laws change in the future, there may be a significant negative impact on the provision for income taxes and cash flows as a result of recording an incremental tax liability in the period such change occurs. A reconciliation of unrecognized tax benefit balances is as follows (in thousands):
|  | December 31, |
|  | 2016 |  |  | 2015 |  |  | 2014 |
Balance at beginning of year |  | $ | 54,541 |  |  | $ | 50,668 |  |  | $ | 48,306 |
Additions based on tax positions related to the current year |  |  | 4,227 |  |  |  | 5,340 |  |  |  | 9,133 |
Additions for tax positions of prior years |  |  | 2,048 |  |  |  | 292 |  |  |  | 2,438 |
Reductions for tax positions of prior years |  |  | (1,948 | ) |  |  | (132 | ) |  |  | — |
Reductions for audit settlements |  |  | (180 | ) |  |  | (1,345 | ) |  |  | — |
Reductions resulting from a lapse of the applicable statute of limitations periods |  |  | (23,448 | ) |  |  | (282 | ) |  |  | (9,209 | )
Balance at end of year |  | $ | 35,240 |  |  | $ | 54,541 |  |  | $ | 50,668 |
For the year ended December 31, 2016, the $23.4 million reduction was primarily due to the expiration of certain federal and state statute of limitations periods for the 2010 through 2012 tax years. For the year ended December 31, 2015, the $0.3 million reduction was primarily due to the expiration of certain federal and state statute of limitations periods for the 2004 tax year. For the year ended December 31, 2014, the $9.2 million reduction was primarily due to the expiration of certain federal and state statute of limitations periods for the 2010 tax year. The balances of unrecognized tax benefits, the amount of related interest and penalties and what Quanta believes to be the range of reasonably possible changes in the next 12 months are as follows (in thousands):
|  | December 31, |
|  | 2016 |  |  | 2015 |  |  | 2014 |
Unrecognized tax benefits |  | $ | 35,240 |  |  | $ | 54,541 |  |  | $ | 50,668 |
Portion that, if recognized, would reduce tax expense and effective tax rate |  |  | 33,128 |  |  |  | 48,312 |  |  |  | 42,952 |
Accrued interest on unrecognized tax benefits |  |  | 5,539 |  |  |  | 8,750 |  |  |  | 6,304 |
Accrued penalties on unrecognized tax benefits |  |  | 650 |  |  |  | 673 |  |  |  | 697 |
Reasonably possible reduction to the balance of unrecognized tax benefits in succeeding 12 months |  | $ | 0 to $12,332 |  |  | $ | 0 to $27,485 |  |  | $ | 0 to $10,221 |
Portion that, if recognized, would reduce tax expense and effective tax rate |  | $ | 0 to $10,983 |  |  | $ | 0 to $24,009 |  |  | $ | 0 to $8,484 |
Quanta classifies interest and penalties within the provision for income taxes. Quanta recognized interest income of $3.2 million, interest expense of $2.4 million and interest expense of $0.5 million in the provision for income taxes for the years ended December 31, 2016, 2015 and 2014, respectively. Although the IRS completed its examination related to tax years 2010, 2011 and 2012 during 2016, certain subsidiaries remain under examination by various U.S. state, Canadian and other foreign tax authorities for multiple periods. Quanta’s Canadian subsidiaries remain open to examination by the Canada Revenue Agency for tax years 2010 through 2014 as these statute of limitations periods have not yet expired. Quanta does not consider any state in which it does business to be a major tax jurisdiction.

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- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32559-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32718-109319 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32639-109319 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32537-109319 + Details
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