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Retirement Plans - Expenses Incurred And Charged Against Operations (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension plan termination expense |  |  | $ 9,526
Employee savings plan/ 401(k) | $ 14,991 | $ 10,962 | 6,659
Supplemental executive retirement plan | 3,475 | 2,862 | 2,343
Post-retirement benefits | 67 | 43 | 144
Non-contributory defined benefit pension plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Expenses incurred and charged against operations | $ 18,533 | $ 13,867 | $ 18,672

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- Definition Represents the total amount of net periodic benefit cost related to post retirement benefits, for the period. + References No definition available. + Details
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- Definition Amount of cost of providing special or contractual termination benefits payable from 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 (q) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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- Definition Amount of cost (reversal of cost) for other postretirement benefits. Excludes pension benefits. + References No definition available. + Details
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- Details
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