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Performance-Contingent Restricted Stock Awards (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 28, 2019 | Dec. 29, 2018 | Dec. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Dividends at vesting | $ 1,361 | $ 498 | $ 553
Fiscal Year Vested 2019 | 2017 Award Granted |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Dividends at vesting | 1,219 |  |
Income tax expense related to share-based payments | 936 |  |
Fair value at vesting | $ 18,570 |  |
Fiscal Year Vested 2018 | 2016 Award Granted |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Dividends at vesting |  | 405 |
Income tax expense related to share-based payments |  | (2,130) |
Fair value at vesting |  | $ 6,504 |
Fiscal Year Vested 2017 | 2015 Award Granted |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Dividends at vesting |  |  | 392
Income tax expense related to share-based payments |  |  | (3,103)
Fair value at vesting |  |  | $ 6,316
TSR Modifier | Fiscal Year Vested 2019 | 2017 Award Granted |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares increase/(decrease) | 205,686 |  |
TSR Modifier | Fiscal Year Vested 2018 | 2016 Award Granted |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares increase/(decrease) |  | (333,112) |
TSR Modifier | Fiscal Year Vested 2017 | 2015 Award Granted |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares increase/(decrease) |  |  | (378,219)
ROIC Modifier | Fiscal Year Vested 2019 | 2017 Award Granted |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares increase/(decrease) | (97,131) |  |
ROIC Modifier | Fiscal Year Vested 2018 | 2016 Award Granted |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares increase/(decrease) |  | (114,190) |
ROIC Modifier | Fiscal Year Vested 2017 | 2015 Award Granted |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares increase/(decrease) |  |  | (49,272)

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- Definition The net total number of shares (or other type of equity) under an equity-based award plan, other than a stock option plan, that were granted, vested and 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)(2)(iii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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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=116856206&loc=d3e5070-113901 + Details
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