| Postemployment Benefits [Abstract] | Period [Axis] |
|---|
2016-01-01 - 2016-12-31 |
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Postemployment Benefits [Abstract] | |
Schedule of Net Periodic Postretirement Benefit Cost | Net periodic postretirement benefit cost included the following components for the years ended December 31, 2016 and 2015: | | | | | | | | | | December 31, | | 2016 | | 2015 | Service cost for benefits earned | $ | 917 |
| | $ | 1,216 |
| Interest cost on accumulated postretirement benefit obligation | 171 |
| | 122 |
| Amortization of prior service cost | 95 |
| | 104 |
| Curtailment gain recognized | — |
| | (209 | ) | Net periodic postretirement cost | $ | 1,183 |
| | $ | 1,233 |
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Summary of Amounts Recognized in Accumulated Other Comprehensive Loss | Amounts recognized in accumulated other comprehensive loss are as follows: | | | | | | | | | | December 31, | | 2016 | | 2015 | Net actuarial (gain) loss | $ | 207 |
| | $ | (38 | ) | Prior service cost | 555 |
| | 650 |
| Total recognized in accumulated other comprehensive loss | $ | 762 |
| | $ | 612 |
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Schedule of Change in Benefit Obligations, Plan Assets and Funded Status of Plan Reconciled | The following table sets forth changes in benefit obligation and plan assets for the years ended December 31, 2016 and 2015 and the funded status of the plan reconciled with the amounts reported in the Company's consolidated financial statements at December 31, 2016 and 2015: | | | | | | | | | | 2016 | | 2015 | Change in Benefit Obligations | | | | Benefit obligation at January 1 | $ | 4,229 |
| | $ | 3,367 |
| Service cost | 917 |
| | 1,216 |
| Interest cost | 171 |
| | 122 |
| Plan amendment | — |
| | — |
| Plan curtailment | — |
| | (275 | ) | Benefits paid | (285 | ) | | (39 | ) | Actuarial loss (gain) | 246 |
| | (162 | ) | Benefit obligation at December 31 | 5,278 |
| | 4,229 |
| Change in Plan Assets | | | | Value of plan assets at January 1 | — |
| | — |
| Employer contributions | 285 |
| | 39 |
| Benefits paid | (285 | ) | | (39 | ) | Value of plan assets at December 31 | — |
| | — |
| Funded status at December 31 | $ | 5,278 |
| | $ | 4,229 |
| Amounts Recognized in Balance Sheet | | | | Current liability | $ | 470 |
| | $ | 316 |
| Non-current liability | 4,808 |
| | 3,913 |
| | $ | 5,278 |
| | $ | 4,229 |
| Amounts Recognized in Accumulated Other Comprehensive Loss | | | | Prior service cost for period | $ | — |
| | $ | — |
| Net actuarial loss (gain) arising during year | 246 |
| | (162 | ) | Amortization: | | | | Prior service cost | (95 | ) | | (170 | ) | Total recognized in other comprehensive loss | $ | 151 |
| | $ | (332 | ) | Weighted Average Assumptions to Determine Benefit Obligation | | | | Discount rate | 3.93 | % | | 4.21 | % | Rate of compensation increase | N/A |
| | N/A |
| Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost | | | | Discount rate | 4.21 | % | | 3.73 | % | Expected return on plan assets | N/A |
| | N/A |
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Summary of Estimated Future Benefit Payments | Estimated future benefit payments, which reflect expected future service, as of December 31, 2016 are as follows: | | | | | 2017 | $ | 470 |
| 2018 | 430 |
| 2019 | 470 |
| 2020 | 537 |
| 2021 | 594 |
| 2022–2026 | 3,689 |
| Total | $ | 6,190 |
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Schedule of Assumed Health Care Cost Trend Rate | The following presents information about the assumed health care cost trend rate: | | | | | | Year Ended December 31, | | 2016 | | 2015 | Health care cost trend rate assumed for next year | 6.83% | | 7.10% | Rate to which the cost trend is assumed to decline (ultimate trend rate) | 4.50% | | 4.50% | Year the rate reaches the ultimate trend rate | 2038 | | 2027 |
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