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Employee Benefit Plans (Tables) | 12 Months Ended
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Dec. 31, 2017
Retirement Benefits [Abstract] |
Summary of Plan Information Relating to Participation in Multiemployer Pension Plans | Information has been presented separately for individually significant plans, based on PPA funding status classification, and in the aggregate for all other plans.
|  | Employee Identification Number/ Pension Plan Number |  | PPA Zone Status |  | Subject to Financial Improve- ment/ Reha- bilitation Plan |  | Contributions (in thousands) | Sur-charge Imposed |  | Expiration Date of Collective Bargaining Agreement
Fund |  |  | 2017 |  | 2016 |  |  | 2017 |  | 2016 |  | 2015 |
National Electrical Benefit Fund |  | 53-0181657-001 |  | Green |  | Green |  | No |  | $ | 29,161 |  |  | $ | 22,912 |  |  | $ | 21,200 |  |  | No |  | Varies through May 2022
Pipeline Industry Pension Fund |  | 73-6146433-001 |  | Green |  | Green |  | No |  | 13,585 |  |  | 6,954 |  |  | 6,087 |  |  | No |  | Varies through May 2020
Central Pension Fund of the IUOE & Participating Employers |  | 36-6052390-001 |  | Green |  | Green |  | No |  | 12,176 |  |  | 5,668 |  |  | 5,677 |  |  | No |  | Varies through December 2020
Teamsters National Pipe Line Pension Plan |  | 46-1102851-001 |  | Green |  | Green |  | No |  | 3,602 |  |  | 1,661 |  |  | 1,343 |  |  | No |  | Varies through December 2020
Laborers Pension Trust Fund for Northern California |  | 94-6277608-001 |  | Yellow |  | Yellow |  | Yes |  | 3,387 |  |  | 3,805 |  |  | 2,603 |  |  | Yes |  | Varies through May 2020
Eighth District Electrical Pension Fund |  | 84-6100393-001 |  | Green |  | Green |  | No |  | 3,208 |  |  | 3,089 |  |  | 2,544 |  |  | No |  | Varies through December 2020
Laborers National Pension Fund |  | 75-1280827-001 |  | Green |  | Green |  | No |  | 3,049 |  |  | 1,358 |  |  | 7,671 |  |  | No |  | Varies through December 2020
Alaska Electrical Pension Plan |  | 92-6005171-001 |  | Green |  | Green |  | No |  | 2,143 |  |  | 2,701 |  |  | 639 |  |  | No |  | Varies through December 2019
Operating Engineers Local 324 Pension Fund |  | 38-1900637-001 |  | Red |  | Red |  | Yes |  | 1,969 |  |  | 1,291 |  |  | 1,231 |  |  | Yes |  | Varies through December 2020
OE Pension Trust Fund |  | 94-6090764-001 |  | Red |  | Red |  | Yes |  | 1,703 |  |  | 1,508 |  |  | 1,264 |  |  | Yes |  | Varies through June 2020
Plumbers and Pipefitters National Pension Fund |  | 52-6152779-001 |  | Yellow |  | Yellow |  | Yes |  | 1,273 |  |  | 1,666 |  |  | 850 |  |  | No |  | Varies through March 2021
Alaska Laborers - Employers Retirement Fund |  | 91-6028298-001 |  | Yellow |  | Yellow |  | Yes |  | 536 |  |  | 1,216 |  |  | 181 |  |  | No |  | December 2018
Laborers District Council of W PA Pension Fund |  | 25-6135576-001 |  | Red |  | Red |  | Yes |  | 418 |  |  | 876 |  |  | 21 |  |  | Yes |  | May 2018
Alaska Teamster Employer Pension Plan |  | 92-6003463-024 |  | Red |  | Red |  | Yes |  | 255 |  |  | 659 |  |  | 513 |  |  | Yes |  | December 2018
Midwest Operating Engineers Pension Trust Fund |  | 36-6140097-001 |  | Yellow |  | Yellow |  | Yes |  | 106 |  |  | 793 |  |  | 3,294 |  |  | Yes |  | June 2019
All other plans - U.S. |  |  |  |  |  |  |  |  |  | 24,234 |  |  | 28,516 |  |  | 20,594 |  |  |  |  |
All other plans - Canada (1) |  |  |  |  |  |  |  |  |  | 9,277 |  |  | 562 |  |  | 1,303 |  |  |  |  |
Total |  |  |  |  |  |  |  |  |  | $ | 110,082 |  |  | $ | 85,235 |  |  | $ | 77,015 |  |  |  |  |
(1) | Multiemployer defined benefit pension plans in Canada are not subject to the reporting requirements under the PPA. Accordingly, certain information was not publicly available.
Quanta’s contributions to the following individually significant plans were five percent or more of the total contributions to these plans for the periods indicated based on the Forms 5500 for these plans for the years ended December 31, 2016 and 2015. Forms 5500 were not yet available for these plans for the year ended December 31, 2017.
Pension Fund |  | Plan Years in which Quanta Contributions Were Five Percent or More of Total Plan Contributions
Pipeline Industry Pension Fund |  | 2016 and 2015
Eighth District Electrical Pension Fund |  | 2016 and 2015
Local 697 IBEW and Electrical Industry Pension Fund |  | 2016 and 2015
Local Union No. 9 IBEW and Outside Contractors Pension Fund |  | 2016 and 2015
Alaska Plumbing and Pipefitting Industry Pension Fund |  | 2016 and 2015
Teamsters National Pipe Line Pension Plan |  | 2016 and 2015
Alaska Electrical Pension Plan |  | 2016
IBEW Local 456 Pension Plan |  | 2016
Michigan Electrical Employees’ Pension Plan |  | 2016
Laborers National Pension Fund |  | 2015
Michigan Upper Peninsula Intrl Brotherhood of Elec Workers Pension Plan |  | 2015

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- Definition Tabular disclosure of the quantitative and qualitative information related to multiemployer plans in which the employer participates. A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947 + Details
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