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Incentive Compensation Plan - Unvested Target Award (Detail) - shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 Months Ended
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Feb. 18, 2021 | Feb. 20, 2020 | Feb. 21, 2019 | Nov. 26, 2018 | May 29, 2018 | Mar. 26, 2018 | Feb. 28, 2018 | Feb. 26, 2018 | Feb. 23, 2017 | Dec. 19, 2016 | Sep. 30, 2016 | Sep. 19, 2016 | Jun. 07, 2016 | Mar. 01, 2016 | Mar. 01, 2016 | Dec. 30, 2015 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 250,800 | 171,500 | 137,500
Granted, Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 134,515 | 95,300 | 78,000
Vested, Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (88,389) | (12,000) | (41,000)
Forfeited, Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (10,911) | (4,000) | (3,000)
Outstanding, end of the year, Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 286,015 | 250,800 | 171,500
Performance Based Stock Awards Vesting Period | 3 years | 3 years | 3 years |  |  |  | 3 years |  | 3 years |  |  |  |  |  |  | 5 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 |  |  |  |  |  |  | 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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 434,180 | 442,832 | 496,603
Granted, Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 143,400 | 125,800 | 134,929
Vested, Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (158,531) | (134,452) | (188,700)
Forfeited, Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (27,949) | 0 | 0
Outstanding, end of the year, Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 391,100 | 434,180 | 442,832
Shares issued (in shares) |  |  | 15,000 | 2,000 | 3,000 | 2,000 |  | 77,500 |  | 15,000 | 10,000 | 33,000 | 10,000 | 5,000 | 10,000 |  |  |  |
Vesting period of restricted stock |  |  | 1 year | 1 year | 1 year | 1 year |  | 1 year |  | 3 years | 1 year | 3 years | 1 year | 1 year | 1 year |  |  |  |
Restricted Stock Units (RSUs) [Member] | Executive Officer [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) | 143,400,000 | 125,800,000 | 121,900,000 |  |  |  | 102,000,000 |  | 93,500,000 |  |  |  |  |  |  | 60,000,000 |  |  |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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