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Summary of Significant Accounting Policies and Basis of Presentation - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 30, 2017 | Dec. 31, 2016 | Jan. 02, 2016
Significant Accounting Policies And Basis Of Presentation [Line Items] |  |  |
Allowance for doubtful accounts | $ 2.0 | $ 6.7 |
Bad debt expenses | $ 1.5 | $ 1.4 | $ 2.1
Inventories valued on LIFO method | 86.90% | 86.70% |
Under Value of carrying value of inventories than its replacement value | $ 50.4 | $ 47.6 |
Effect on income due to change in LIFO valuation on liquidation | 0.2 | 0.2 | $ 0.6
Capitalized computer software | 30.7 | 32.9 |
Workers' compensation liability | 0.5 |  |
Health care insurance liability | 0.5 |  |
Current portion of self insurance liability | 8.7 | 8.3 |
Long term portion of self insurance liability | $ 6.5 | $ 6.4 |
Weighted average shares not included in EPS calculations | 75,159 | 0 | 0
Issuance of preferred stock | 10,000,000 | 10,000,000 |
Preferred stock, shares outstanding | 0 | 0 |
Advertising expenses | $ 43.4 | $ 46.6 | $ 47.7
Accounting Standards Update 2016-09 [Member] |  |  |
Significant Accounting Policies And Basis Of Presentation [Line Items] |  |  |
Recognition of tax benefits in provision for income taxes | 1.3 |  |
Increase in net cash provided by operating activities |  | 2.7 | 4.0
Increase in net cash used in financing activities |  | 2.7 | $ 4.0
Accounting Standards Update 2014-09 [Member] |  |  |
Significant Accounting Policies And Basis Of Presentation [Line Items] |  |  |
Contracts net sales | (160.0) | $ (170.0) |
Accounting Standards Update 2018-02 [Member] | New Accounting Pronouncement, Early Adoption, Effect |  |  |
Significant Accounting Policies And Basis Of Presentation [Line Items] |  |  |
Reclassification from AOCI to retained earningsd, on application of accounting guidance | $ 2.7 |  |
Minimum [Member] |  |  |
Significant Accounting Policies And Basis Of Presentation [Line Items] |  |  |
Reserved expenses paid over remaining lease term | 1 year |  |
Maximum [Member] |  |  |
Significant Accounting Policies And Basis Of Presentation [Line Items] |  |  |
Reserved expenses paid over remaining lease term | 11 years |  |

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