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Retirement Plans And Other Postretirement Benefits (Narrative) (Details) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Feb. 09, 2022 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Percentage of change in health care cost trend rate assumptions would be immaterial |  | 1.00% |  |
Defined Benefit Average Remaining Duration Of Benefit Payments For Pension Plan |  | 9 years 7 months 6 days |  |
Defined Benefit Plan, Expected Future Pension Expense, Next Twelve Months |  | $ 14,000 |  |
Expected long-term return on plan assets |  | 15.10% | 10.40% | 10.90%
Unfunded Non-Qualified Supplemental Pension Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Projected benefit obligation to unfunded plan |  | $ 1,700 | $ 2,100 |
Pension Benefits |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Projected benefit obligation to unfunded plan |  | 248,114 | $ 316,169 | $ 336,159
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year |  | $ 12,000 |  |
Expected long-term return on plan assets |  | 3.05% | 5.00% | 5.00%
Employer contributions | $ 50,000 | $ 50,184 | $ 5,209 |
Settlement Funding Gap | $ 24,000 |  |  |
Defined Benefit Plan Assumption Expected Long Term Return On Assets At Year End |  | 4.99% | 3.05% | 5.00%
Other Post-Retirement Benefits |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Projected benefit obligation to unfunded plan |  | $ 5,726 | $ 7,370 | $ 8,164
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year |  | 200 |  |
Employer contributions |  | $ 476 | $ 463 |

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- Definition An assumption as to the rate of return on plan assets at the end of the year that reflects the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation. + References No definition available. + Details
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- Definition Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan. + 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 (k)(3) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e2919-114920 + Details
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