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Employee and Retiree Benefit Plans - Projected Benefit Obligations, Accumulated Benefit Obligations and Fair Value of Plan Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Funded plan | Qualified plan |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Projected Benefit Obligations | $ 511,375 | $ 734,375
Accumulated Benefit Obligations | 499,338 | 723,887
Fair Value of Plan Assets | 434,283 | 589,529
Unfunded plan | Other postretirement plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Projected Benefit Obligations | 67,679 | 96,133
Accumulated Benefit Obligations | 67,679 | 96,133
Fair Value of Plan Assets | 0 | 0
Unfunded plan | Nonqualified plan |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Projected Benefit Obligations | 141,917 | 188,713
Accumulated Benefit Obligations | 139,634 | 188,530
Fair Value of Plan Assets | $ 0 | $ 0

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- Definition Amount of plan asset for defined benefit plan with accumulated benefit obligation in excess of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e2417-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e2417-114920 + Details
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