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Retirement Plans, Expected Employer Contribution and Benefit Payments (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Pension Plan [Member] |  |
Expected employer contributions [Abstract] |  |
First year | $ 8,374 | $ 145
Expected benefit payments (gross) [Abstract] |  |
Year one | 16,312 | 15,480
Year two | 16,899 | 16,678
Year three | 17,808 | 17,598
Year four | 18,650 | 18,382
Year five | 19,707 | 19,127
Next five years | 110,417 | 109,845
SERP [Member] |  |
Expected employer contributions [Abstract] |  |
First year | 0 | 0
Expected benefit payments (gross) [Abstract] |  |
Year one | 108 | 130
Year two | 104 | 104
Year three | 99 | 100
Year four | 94 | 96
Year five | 90 | 91
Next five years | 359 | 381
Other Postretirement Benefits [Member] |  |
Expected employer contributions [Abstract] |  |
First year | 0 | 0
Expected benefit payments (gross) [Abstract] |  |
Year one | 50 | 50
Year two | 49 | 49
Year three | 47 | 48
Year four | 45 | 47
Year five | 43 | 45
Next five years | $ 176 | $ 194

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- Definition Amount of benefit for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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