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Benefit Plans - Additional Disclosures (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Other Postretirement Benefit Plan |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Company Contributions | $ 0 | $ 0
Current plus 1 | 0 |
Actual Benefit Payments for the Year Ending: Current | 1,963 |
Expected Benefit Payments for the Year Ending: Current plus 1 | 1,713 |
Expected Benefit Payments for the Year Ending: Current plus 2 | 1,888 |
Expected Benefit Payments for the Year Ending: Current plus 3 | 2,000 |
Expected Benefit Payments for the Year Ending: Current plus 4 | 2,148 |
Expected Benefit Payments for the Year Ending: Current plus 5 | 2,108 |
Expected Benefit Payments for the Year Ending: Current plus 6 - 10 | $ 9,854 |
Other Postretirement Benefit Plan | Equity securities | Minimum |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target asset allocations (in hundredths) | 70.00% |
Other Postretirement Benefit Plan | Equity securities | Maximum |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target asset allocations (in hundredths) | 100.00% |
Other Postretirement Benefit Plan | Real Estate | Minimum |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target asset allocations (in hundredths) | 0.00% |
Other Postretirement Benefit Plan | Real Estate | Maximum |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target asset allocations (in hundredths) | 15.00% |
Other Postretirement Benefit Plan | Commodities | Minimum |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target asset allocations (in hundredths) | 0.00% |
Other Postretirement Benefit Plan | Commodities | Maximum |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target asset allocations (in hundredths) | 10.00% |
Other Postretirement Benefit Plan | Fixed Income/Cash | Minimum |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target asset allocations (in hundredths) | 0.00% |
Other Postretirement Benefit Plan | Fixed Income/Cash | Maximum |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target asset allocations (in hundredths) | 10.00% |
Pension and Supplemental Executive Retirement Plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Company Contributions | $ 7,162 | $ 12,453
Current plus 1 | 6,500 |
Actual Benefit Payments for the Year Ending: Current | 40,844 |
Expected Benefit Payments for the Year Ending: Current plus 1 | 28,806 |
Expected Benefit Payments for the Year Ending: Current plus 2 | 29,023 |
Expected Benefit Payments for the Year Ending: Current plus 3 | 28,247 |
Expected Benefit Payments for the Year Ending: Current plus 4 | 28,320 |
Expected Benefit Payments for the Year Ending: Current plus 5 | 28,815 |
Expected Benefit Payments for the Year Ending: Current plus 6 - 10 | $ 131,716 |

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- Definition The amount of payments made from the benefit fund and company funds for which participants are entitled under a pension plan, including pension benefits, death benefits, and benefits due on termination of employment. May also include payments made under a postretirement benefit plan. This item represents a periodic decrease to the plan obligations and a decrease to plan assets. + References No definition available. + Details
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- Definition Amount of contribution received by defined benefit plan from employer which increases plan assets. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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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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- Definition Amount of benefit for defined benefit plan expected to be paid in next 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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