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Other Postretirement Benefits | 12 Months Ended
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Dec. 31, 2017
Other Postretirement Benefits [Abstract] |
Other Postretirement Benefits | OTHER POSTRETIREMENT BENEFITS The Company has an unfunded postretirement healthcare plan which provides health insurance to certain employees and their spouses upon retirement. This plan has been frozen and no additional participants will be added to the plan in the future. The following table presents the changes in the accumulated postretirement benefit obligation related to the Company’s unfunded postretirement healthcare benefits at December 31 (in thousands):
| 2017 |  | 2016
Projected benefit obligation at January 1 | $ | 7,202 |  |  | $ | 8,149 |
Service cost | 17 |  |  | 22 |
Interest cost | 269 |  |  | 272 |
Actuarial gain | (150 | ) |  | (923 | )
Benefits paid, net of contributions | (318 | ) |  | (318 | )
Projected benefit obligation at December 31 | 7,020 |  |  | 7,202 |
Fair value of plan assets | — |  |  | — |
Under funded status | (7,020 | ) |  | (7,202 | )
Unamortized prior service cost | 427 |  |  | 471 |
Unrecognized actuarial loss | 2,382 |  |  | 2,679 |
Net amount recognized | $ | (4,211 | ) |  | $ | (4,052 | )
Amounts recognized in the consolidated financial statements consisted of (in thousands):
| 2017 |  | 2016
Accrued postretirement benefit liability |  |  |
Current portion | $ | 314 |  |  | $ | 294 |
Long term portion | 6,706 |  |  | 6,908 |
Pre-tax accumulated other comprehensive loss – unamortized post-retirement healthcare costs | (2,809 | ) |  | (3,150 | )
Net amount recognized | $ | 4,211 |  |  | $ | 4,052 |
The measurement date used to determine postretirement benefit obligation measures was December 31. Components of net periodic postretirement benefit cost charged to expense for the years ended December 31 were as follows (in thousands):
| 2017 |  | 2016 |  | 2015
Service cost | $ | 17 |  |  | $ | 22 |  |  | $ | 26 |
Interest cost | 269 |  |  | 272 |  |  | 300 |
Amortization of unrecognized prior service cost | 44 |  |  | 44 |  |  | 44 |
Loss amortization (2) | 146 |  |  | 134 |  |  | 197 |
Net periodic benefit cost | $ | 476 |  |  | $ | 472 |  |  | $ | 567 |
Assumptions used to calculate the benefit obligation: |  |  |  |  |
Discount rate | 3.4 | % |  | 3.8 | % |  | 3.9 | %
Annual rate of increase in the per capita cost of: |  |  |  |  |
Medical costs before age 65 (1) | 7.3 | % |  | 7.5 | % |  | 7.8 | %
Medical costs after age 65 (1) | 6.3 | % |  | 6.5 | % |  | 6.8 | %
Prescription drug costs (1) | 10.5 | % |  | 10.5 | % |  | 11.0 | %
(1) It was assumed that these rates would gradually decline to 4% by 2075. (2) Actuarial (gains)/losses are amortized utilizing the corridor approach. Differences between actual experience and the actuarial assumptions are reflected in (gain)/loss. If the total net (gain) or loss exceeds 10 percent of the greater of the accumulated postretirement benefit obligation or plan asset, this excess must be amortized over the average remaining service period of the active plan participants. If most of the plan participants are inactive, the amortization period is the expected future lifetime of inactive plan participants. A 1% change in the annual medical inflation rate issued would have the following impact on the amounts reported at December 31 as follows (in thousands):
| 2017 |  | 2016
Effect on accumulated postretirement benefit obligation |  |  |
1% increase | $ | 950 |  |  | $ | 975 |
1% decrease | $ | (803 | ) |  | $ | (824 | )
Effect on annual service and interest costs |  |  |
1% increase | $ | 41 |  |  | $ | 42 |
1% decrease | $ | (34 | ) |  | $ | (35 | )
Expected benefit payments from the plan for the years ended December 31 are as follows (in thousands):
|  | 2018 |  | 2019 |  | 2020 |  | 2021 |  | 2022 |  | 2023 - 2027
Expected benefit payments |  | $ | 314 |  |  | $ | 333 |  |  | $ | 353 |  |  | $ | 371 |  |  | $ | 389 |  |  | $ | 2,159 |

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- Definition Other Postretirement Benefits [Abstract]. + References No definition available. + Details
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- Definition The entire disclosure for postemployment benefits, which may include supplemental unemployment benefits, obligations recognized for all types of benefits provided to former or inactive employees, their beneficiaries, and covered dependents after employment but before retirement. Disclosure may also include discussion that an obligation for postemployment benefits is not accrued in accordance with regulation only because the amount cannot be reasonably estimated. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 712 -URI http://asc.fasb.org/topic&trid=2197446 + Details
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