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Employer Contributions, Participant Contributions and Benefit Payments (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Pension Plans |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Employer Contributions | $ 3,800 | $ 4,100 | $ 4,665
Benefits Paid | 9,724 | 6,489 | 6,038
Other Postretirement Benefit Plans, Defined Benefit |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Employer Contributions | 12,153 | 8,903 | 4,156
Participant Contributions | 279 | 220 | 240
Benefits Paid | 3,503 | 2,905 | 2,568
Supplemental Employee Retirement Plans, Defined Benefit |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Employer Contributions | 637 | 637 | 654
Benefits Paid | $ 637 | $ 637 | $ 654

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- Definition Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + 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 (a)(6) -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 60 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 + Details
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- Definition Amount of contributions received by defined benefit plan from participant which increase benefit obligation. + 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 (a)(3) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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