Retirement Plans and Related Post Retirement Benefits - Summarizes the Components of the Net Periodic Cost (Details) - SERP - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
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| Net Periodic Cost | |||
| Service Cost — Benefits Earned During Period | $ 223 | $ 181 | $ 200 |
| Interest Cost | 836 | 916 | 899 |
| Amortization of Prior Service Cost | 386 | 386 | 386 |
| Amortization of Losses | 648 | 300 | 629 |
| Net Periodic Cost | $ 2,093 | $ 1,783 | $ 2,114 |
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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition Amount of cost recognized for passage of time related to defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of net periodic benefit cost (credit) for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Details
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