Retirement Plans and Related Post Retirement Benefits - Assumptions Used to Determine the Net Periodic Cost (Details) |
12 Months Ended | ||
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Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
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| SERP | |||
| Defined Benefit Plan Disclosure | |||
| Discount Rate | 3.17% | 4.20% | 3.60% |
| SERP Medical | |||
| Defined Benefit Plan Disclosure | |||
| Future Average Compensation Increases | 2.00% | 2.00% | |
| SERP Medical | Minimum | |||
| Defined Benefit Plan Disclosure | |||
| Future Average Compensation Increases | 0.00% | 2.00% | |
| SERP Medical | Maximum | |||
| Defined Benefit Plan Disclosure | |||
| Future Average Compensation Increases | 2.00% | 3.00% | |
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Weighted average rate of compensation increase used to determine net periodic benefit cost of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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