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Incentive Compensation Plan - Unvested Target Award (Detail) - shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 Months Ended | 12 Months Ended
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Sep. 11, 2023 | Aug. 16, 2023 | Mar. 27, 2023 | Jan. 23, 2023 | Dec. 16, 2022 | Dec. 06, 2022 | Mar. 28, 2022 | Feb. 17, 2022 | Jan. 03, 2022 | Dec. 13, 2021 | Dec. 09, 2021 | Nov. 22, 2021 | Nov. 19, 2021 | Sep. 27, 2021 | Jun. 14, 2021 | Feb. 18, 2021 | Feb. 20, 2020 | Feb. 21, 2019 | Nov. 26, 2018 | May 29, 2018 | Mar. 26, 2018 | Feb. 26, 2018 | Mar. 26, 2023 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding, beginning of the year, Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 311,265 | 286,015 | 250,800
Granted, Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 106,750 | 108,000 | 134,515
Vested, Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (90,810) | (75,500) | (88,389)
Forfeited, Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (10,140) | (7,250) | (10,911)
Outstanding, end of the year, Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 317,065 | 311,265 | 286,015
Performance Based Stock Awards Vesting Period |  |  |  | 3 years |  |  |  | 3 years |  |  |  |  |  |  |  | 3 years | 3 years | 3 years |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award Percentage Of Target Award Participants Earn |  |  |  | 40.00% |  |  |  | 40.00% |  |  |  |  |  |  |  | 40.00% | 40.00% | 40.00% |  |  |  |  |  |  |  |
Performance Shares Awards As Percentage Of Target |  |  |  | 100.00% |  |  |  | 100.00% |  |  |  |  |  |  |  | 100.00% | 100.00% | 100.00% |  |  |  |  |  |  |  |
Percentage Of Target Award Opportunities Maximum In Certain Cases |  |  |  | 200.00% |  |  |  | 200.00% |  |  |  |  |  |  |  | 200.00% | 200.00% | 200.00% |  |  |  |  |  |  |  |
Vesting period of restricted stock |  |  |  | 0 years |  |  |  | 0 years |  |  |  |  |  |  |  | 0 years | 0 years | 0 years |  |  |  |  |  |  |  |
Restricted Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding, beginning of the year, Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 434,352 | 391,100 | 434,180
Granted, Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 162,774 | 200,503 | 143,400
Vested, Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (143,412) | (157,251) | (158,531)
Forfeited, Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | (27,949)
Outstanding, end of the year, Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 453,714 | 434,352 | 391,100
Shares issued (in shares) | 8,000 | 1,000 | 25,000 |  | 1,000 | 1,500 | 50,000 | 57,000 | 1,000 | 2,000 | 1,000 | 1,565 | 24,000 | 6,000 | 15,000 | 84,950 | 95,300 |  | 2,000 | 3,000 | 2,000 | 77,500 | 26,200 |  |  |
Vesting period of restricted stock | 1 year | 1 year | 1 year |  | 1 year | 1 year | 1 year | 1 year | 1 year | 1 year | 1 year | 1 year | 1 year | 1 year | 3 years | 1 year | 1 year |  | 1 year | 1 year | 1 year | 1 year | 1 year |  |  |
Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued (in shares) |  |  |  | 159,000,000 |  |  |  | 121,200,000 |  |  |  |  |  |  |  | 143,400,000 | 125,800,000 | 121,900,000 |  |  |  |  |  |  |  |

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- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(03) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(02) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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