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Post Retirement Benefits | 12 Months Ended
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Dec. 31, 2017
Retirement Benefits [Abstract] |
Post Retirement Benefits | The Company provides post retirement benefits to certain of its United States employees, including contributions to a multi-employer defined benefit pension plan, health care and life insurance benefits, and contributions to three 401(k) defined contribution plans. The Company contributes to a multi-employer defined benefit pension plan for its employees represented by the International Association of Machinists and Aerospace Workers ("IAM") at the Company’s Columbus, Ohio production facility. The Company does not administer this plan and contributions are determined in accordance with provisions of the collective bargaining agreement. The risks of participating in this multi-employer plan are different from a single-employer plan in the following aspects:
• | Assets contributed to the multi-employer plan by one employer may be used to provide benefits to employees of other participating employers.
• | If a participating employer stops contributing to the plan, the unfunded obligations of the plan may be borne by the remaining participating employers.
• | If the Company chooses to stop participating in its multi-employer plan, the Company may be required to pay the plan an amount based on the underfunded status of the plan, referred to as a withdrawal liability.
The Company’s participation in the multi-employer defined benefit pension plan for the years ended December 31, 2017 and 2016 is outlined in the table below. The most recent Pension Protection Act ("PPA") zone status available in 2017 and 2016 is for the plan’s year-end at December 31, 2016, and December 31, 2015, respectively. The zone status is based on information the Company received from the plan and is certified by the plan’s actuary. Among other factors, plans in the red zone are generally less than 65% funded, plans in the yellow zone are less than 80% funded, and plans in the green zone are at least 80% funded. The “FIP/RP Status Pending/Implemented” column indicates whether a financial improvement plan ("FIP") or a rehabilitation plan ("RP") is either pending or has been implemented.
Pension Fund |  | EIN/Pension Plan Number |  | Pension Protection Act Zone Status |  | FIP/RP Status Pending/ Implemented |  | Contributions of the Company |  | Surcharge Imposed |  | Expiration Date of Collective Bargaining Agreement
|  | 2017 |  | 2016 |  |  | 2017 |  | 2016 |  |
IAM National Pension Fund / National Pension Plan (A) |  | 51-6031295 - 002 |  | Green as of 12/31/16 |  | Green as of 12/31/15 |  | No |  | $647,000 |  | $710,000 |  | No |  | 8/10/2019
|  |  |  |  |  | Total Contributions: |  | $647,000 |  | $710,000 |  |  |  |
(A) The plan re-certified its zone status after using the amortization provisions of the Code. The Company's contributions to the plan did not represent more than 5% of total contributions to the plan as indicated in the plan's most recently available annual report for the plan year ended December 31, 2016. Under the terms of the collective-bargaining agreement, the Company is required to make contributions to the plan for each hour worked up to a maximum of 40 hours per person, per week, at the following rates: $1.45 per hour from August 8, 2016 through August 6, 2017; $1.50 per hour from August 7, 2017 through August 5, 2018; $1.55 per hour from August 6, 2018 through August 10, 2019. Prior to the acquisition of Columbus Plastics, certain of the Company's employees were participants, or were eligible to participate, in Navistar's post retirement health and life insurance benefit plan. This plan provides healthcare and life insurance benefits for certain employees upon their retirement, along with their spouses and certain dependents and requires cost sharing between the Company, Navistar and the participants, in the form of premiums, co-payments, and deductibles. The Company and Navistar share the cost of benefits for these employees, using a formula that allocates the cost based upon the respective portion of time that the employee was an active service participant after the acquisition of Columbus Plastics to the period of active service prior to the acquisition of Columbus Plastics. The Company also sponsors a post retirement health and life insurance benefit plan for certain union retirees of its Columbus, Ohio production facility. In August 2010, as part of a new collective-bargaining agreement, the post retirement health and life insurance benefits for all current and future represented employees who were not retired were eliminated in exchange for a one-time cash payment. Individuals who retired prior to August 2010 remain eligible for post retirement health and life insurance benefits. The elimination of post retirement health and life insurance benefits described above resulted in a reduction of the Company’s post retirement benefits liability of approximately $10,282,000 in 2010. This reduction in post retirement benefits liability was treated as a negative plan amendment and is being amortized as a reduction to net periodic benefit cost over approximately twenty years, the actuarial life expectancy of the remaining participants in the plan at the time of the amendment. This negative plan amendment resulted in net periodic benefit cost reductions of approximately $496,000 in 2017, 2016 and 2015, and will result in net periodic benefit cost reductions of approximately $496,000 in 2018 and each year thereafter during the amortization period. The funded status of the Company's post retirement health and life insurance benefits plan as of December 31, 2017 and 2016 and reconciliation with the amounts recognized in the consolidated balance sheets are provided below.
| Post Retirement Benefits
| 2017 |  | 2016
Change in benefit obligation: |  |  |
Benefit obligation at January 1 | $ | 8,667,000 |  |  | $ | 9,006,000 |
Interest cost | 298,000 |  |  | 323,000 |
Unrecognized loss (gain) | 417,000 |  |  | (320,000 | )
Benefits paid | (332,000 | ) |  | (342,000 | )
Benefit obligation at December 31 | $ | 9,050,000 |  |  | $ | 8,667,000 |
Plan Assets | — |  |  | — |
Amounts recorded in accumulated other comprehensive income: |  |  |
Prior service credit | $ | (6,602,000 | ) |  | $ | (7,098,000 | )
Net loss | 3,733,000 |  |  | 3,464,000 |
Total | $ | (2,869,000 | ) |  | $ | (3,634,000 | )
Weighted-average assumptions as of December 31: |  |  |
Discount rate used to determine benefit obligation and net periodic benefit cost | 3.4 | % |  | 3.8 | %
The components of expense for all of the Company's post retirement benefit plans for the years ended December 31:
| 2017 |  | 2016 |  | 2015
Pension expense: |  |  |  |  |
Multi-employer plan | $ | 647,000 |  |  | $ | 710,000 |  |  | $ | 863,000 |
Defined contribution plans | 752,000 |  |  | 766,000 |  |  | 836,000 |
Total pension expense | 1,399,000 |  |  | 1,476,000 |  |  | 1,699,000 |
Health and life insurance: |  |  |  |  |
Interest cost | 298,000 |  |  | 323,000 |  |  | 316,000 |
Amortization of prior service costs | (496,000 | ) |  | (496,000 | ) |  | (496,000 | )
Amortization of net loss | 149,000 |  |  | 155,000 |  |  | 169,000 |
Net periodic benefit cost | (49,000 | ) |  | (18,000 | ) |  | (11,000 | )
Total post retirement benefits expense | $ | 1,350,000 |  |  | $ | 1,458,000 |  |  | $ | 1,688,000 |
The Company accounts for post retirement benefits under FASB ASC 715, which requires the recognition of the funded status of a defined benefit pension or post retirement plan in the consolidated balance sheets. For the year ended December 31, 2017, the Company recognized a net actuarial loss of $417,000 and for the year ended December 31, 2016 recognized a net actuarial gain of $320,000, both of which were recorded in accumulated other comprehensive income. Amounts not yet recognized as a component of net periodic benefit costs at December 31, 2017 and 2016 were a net credit of $2,869,000 and $3,634,000, respectively. The amount in accumulated other comprehensive income expected to be recognized as components of net periodic post retirement cost during 2018 consists of a prior service credit of $496,000, and a net loss of $171,000. In addition, 2018 interest expense related to post retirement healthcare is expected to be $277,000, for a total post retirement healthcare net gain of approximately $48,000 in 2018. The Company expects benefits paid in 2018 to be consistent with estimated future benefit payments as shown in the table below. The weighted average rate of increase in the per capita cost of covered health care benefits is projected to be 7%. The rate is projected to decrease gradually to 5% by the year 2025 and remain at that level thereafter. The comparable assumptions for the prior year were 7% and 5%, respectively. The effect of changing the health care cost trend rate by one-percentage point for each future year is as follows:
| 1- Percentage Point Increase |  | 1-Percentage Point Decrease
Effect on total of service and interest cost components | $ | 48,000 |  |  | $ | (40,000 | )
Effect on post retirement benefit obligation | $ | 1,264,000 |  |  | $ | (1,068,000 | )
The estimated future benefit payments of the health care plan for the next ten years are as follows:
Year | Postretirement Health Care Benefits Plan
2018 | $ | 1,096,000 |
2019 | 444,000 |
2020 | 474,000 |
2021 | 495,000 |
2022 | 518,000 |
2023-2027 | 2,456,000 |

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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