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Vesting Time-Based Restricted Stock Units (Detail) - USD ($) $ in Thousands | 4 Months Ended
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Apr. 24, 2021 | Apr. 18, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Dividends at Vesting | $ 163 | $ 87
Fiscal Year Vested 2021 | 2020 Award Granted |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Dividends at Vesting | 53 |
Tax Benefit | 16 |
Fair Value at Vesting | 1,520 |
Fiscal Year Vested 2021 | 2019 Award |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Dividends at Vesting | 107 |
Tax Benefit | 77 |
Fair Value at Vesting | 1,582 |
Fiscal Year Vested 2020 | 2019 Award |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Dividends at Vesting | 55 |
Tax Benefit | 57 |
Fair Value at Vesting | $ 1,831 |

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- Definition Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash. + 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 (d)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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