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Retirement Plans, Amounts Recognized in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Pension Plan [Member] |  |
Amounts recognized in accumulated other comprehensive income [Abstract] |  |
Net actuarial (gain) loss | $ 25,449 | $ 32,600
Prior service cost (credit) | 0 | 0
Accumulated other compensation income | 25,449 | 32,600
SERP [Member] |  |
Amounts recognized in accumulated other comprehensive income [Abstract] |  |
Net actuarial (gain) loss | 324 | 428
Prior service cost (credit) | 0 | 0
Accumulated other compensation income | 324 | 428
Other Postretirement Benefits [Member] |  |
Amounts recognized in accumulated other comprehensive income [Abstract] |  |
Net actuarial (gain) loss | 2,299 | (2,634)
Prior service cost (credit) | 0 | 0
Accumulated other compensation income | $ 2,299 | $ (2,634)

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- Definition Amount, before tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + 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 (j) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=124509347&loc=SL7669686-108580 + Details
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