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SERP Expense and Contributions paid (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Pension Cost (Reversal of Cost) | $ 487,000 | $ 562,000 | $ 1,200,000
Supplemental Employee Retirement Plan [Member] |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Pension Cost (Reversal of Cost) | 703,000 | 1,681,000 | 2,275,000
Defined Benefit Plan, Plan Assets, Contributions by Employer | $ 450,000 | $ 475,000 | $ 475,000

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