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Retirement Plans and Other Post-Retirement Benefits - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items] |  |  |
Employer contribution of employee's eligible earnings, percentage | 7.00% |  |
Projected benefit obligation | $ 44,885 | $ 47,333 |
Defined contribution plans Employees contribution | 50.00% |  |
Expense associated with Defined Contribution Plans | $ 2,400 | $ 2,000 | $ 1,900
Employer discretionary contribution of employee's eligible earnings, percentage | 10.00% | 11.00% |
Non-qualified Plans | Unfunded |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Projected benefit obligation | $ 44,900 |  |
Pension Benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Decrease in projected benefit obligation |  |  | 309,500
Decrease in plan assets |  |  | 309,500
Pension plan settlement charge |  | $ 2,300 | $ 75,300
Assets remain in pension trust | (44,885) | $ (47,333) |
Amount transferred to suspense account to fund future 401(k) contributions | 14,100 |  |
Paying of excise taxes | 8,300 |  |
Available for general corporate purposes | $ 33,300 |  |
Discount rates | 2.42% | 2.17% |
Pension Benefits | Maximum |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Discount rates | 2.88% |  |
Pension Benefits | Minimum |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Discount rates | 1.10% |  |
Pension Benefits | Cash and Cash Equivalents |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Assets remain in pension trust |  | $ 53,400 |
Deferred Compensation Plan | Maximum |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Employer contribution of employee's eligible earnings, percentage | 7.00% |  |
Other Benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Assets remain in pension trust | $ (5,130) | $ (5,967) |
Discount rates | 2.70% | 2.30% |

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- Definition Defined benefit plan assets amount transferred to suspense account to fund future 401k contributions. + References No definition available. + Details
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- Definition Defined benefit plan assets available for general corporate purposes. + References No definition available. + Details
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- Definition Defined benefit plan assets paying of excise taxes. + References No definition available. + Details
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- Definition Amount of asset (liability), recognized in statement of financial position, for defined benefit pension and other postretirement plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123453770&loc=d3e1703-114919 + Details
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation 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)(1) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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