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Multiemployer Plans (Tables) | 12 Months Ended
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Dec. 31, 2017
Multiemployer Plans |
Schedule of the entity's contributions to different pension funds |
|  |  |  |  |  |  |  |  |  |  |  | Collective |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  |  | FIP/RP |  |  |  | Bargaining |  |  |  |  |  |  |  |  |  |
|  | EIN / |  | Pension Protection Act |  | Status |  |  |  | Agreement |  |  |  |  |  |  |  |  |  |
|  | Pension Plan |  | Zone Status |  | Pending / |  | Surcharge |  | Expiration |  | Contributions of the Company |
Pension Fund Name |  | Number |  | 2017 |  | 2016 |  | Implemented |  | Imposed |  | Date |  | 2017 |  | 2016 |  | 2015 |
Central Pension Fund of the International Union of Operating Engineers and Participating Employers |  | 36-6052390/001 |  | Green as of February 1, 2016 |  | Green as of February 1, 2015 |  | No |  | No |  | 5/31/2020 |  | $ | 7,562 |  | $ | 5,373 |  | $ | 5,659 |
Pipeline Industry Benefit Fund |  | 73-6146433/001 |  | Green as of January 1, 2016 |  | Green as of January 1, 2015 |  | No |  | No |  | 5/31/2020 |  |  | 6,050 |  |  | 2,740 |  |  | 3,783 |
Laborers International Union of North America National (Industrial) Pension Fund |  | 52-6074345/001 |  | Red as of January 1, 2016 |  | Red as of January 1, 2015 |  | No |  | No |  | 5/31/2020 |  |  | 4,658 |  |  | 2,415 |  |  | 3,287 |
Southern California Pipetrades Trust Funds |  | 51-6108443/001 |  | Green as of January 1, 2016 |  | Green as of January 1, 2015 |  | No |  | No |  | 9/30/2022 |  |  | 3,219 |  |  | 2,614 |  |  | 2,180 |
Laborers Pension Trust Fund for Northern California |  | 94-6277608/001 |  | Yellow as of June 1, 2016 |  | Yellow as of June 1, 2015 |  | No |  | No |  | 6/30/2019 |  |  | 2,945 |  |  | 3,598 |  |  | 3,150 |
National Pension Fund |  | 52-6152779 |  | Yellow as of July 1 2017 |  | Yellow as of July 1 2016 |  | No |  | No |  | 9/30/2022 |  |  | 2,548 |  |  | 2,161 |  |  | 2,106 |
Operating Engineer Trust Funds |  | 95-6032478/001 |  | Yellow as of July 1, 2016 |  | Yellow as of July 1, 2016 |  | No |  | No |  | 6/30/2019 |  |  | 2,448 |  |  | 1,643 |  |  | 1,401 |
|  |  |  |  |  |  |  | Contributions to significant plans |  |  | 29,430 |  |  | 20,544 |  |  | 21,566 |
|  |  |  |  |  |  |  | Contributions to other multiemployer plans |  |  | 17,505 |  |  | 13,639 |  |  | 12,730 |
|  |  |  |  |  |  |  | Total contributions made |  | $ | 46,935 |  | $ | 34,183 |  | $ | 34,296 |

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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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