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Summary of Significant Accounting Policies and Basis of Presentation - Additional Information (Detail) - USD ($) |  | 3 Months Ended | 4 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 30, 2018 | Dec. 30, 2017 | Oct. 07, 2017 | Jul. 15, 2017 | Dec. 31, 2016 | Oct. 08, 2016 | Jul. 16, 2016 | Apr. 22, 2017 | Apr. 23, 2016 | Dec. 29, 2018 | Dec. 30, 2017 | Dec. 31, 2016
Significant Accounting Policies And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue recognition performance obligation on international shipments |  |  |  |  |  |  |  |  |  | $ 0 |  |
Allowance for doubtful accounts |  | $ 2,000,000 |  |  |  |  |  |  |  | 4,300,000 | $ 2,000,000 |
Bad debt expenses |  |  |  |  |  |  |  |  |  | $ 3,400,000 | $ 1,500,000 | $ 1,400,000
Inventories valued on LIFO method |  | 86.90% |  |  |  |  |  |  |  | 88.90% | 86.90% |
Under Value of carrying value of inventories than its replacement value |  | $ 50,400,000 |  |  |  |  |  |  |  | $ 55,100,000 | $ 50,400,000 |
Effect on income due to change in LIFO valuation on liquidation |  |  |  |  |  |  |  |  |  | 1,100,000 | 200,000 | $ 200,000
Capitalized computer software |  | 30,700,000 |  |  |  |  |  |  |  | 33,500,000 | 30,700,000 |
Workers' compensation liability |  |  |  |  |  |  |  |  |  | 500,000 |  |
Health care insurance liability |  |  |  |  |  |  |  |  |  | 500,000 |  |
Automobile insurance liability |  |  |  |  |  |  |  |  |  | 1,000,000 |  |
Current portion of self insurance liability |  | 8,700,000 |  |  |  |  |  |  |  | 8,600,000 | 8,700,000 |
Long term portion of self insurance liability |  | $ 6,500,000 |  |  |  |  |  |  |  | $ 5,700,000 | $ 6,500,000 |
Weighted average shares not included in EPS calculations |  |  |  |  |  |  |  |  |  | 0 | 75,159 | 0
Issuance of preferred stock |  | 10,000,000 |  |  |  |  |  |  |  | 10,000,000 | 10,000,000 |
Preferred stock, shares outstanding |  | 0 |  |  |  |  |  |  |  | 0 | 0 |
Advertising expenses |  |  |  |  |  |  |  |  |  | $ 40,900,000 | $ 43,400,000 | $ 46,600,000
Retained earnings |  | $ 239,993,000 |  |  |  |  |  |  |  | 247,642,000 | 239,993,000 |
Accounting Standards Update 2014-09 [Member] |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Decrease in net sales |  | 38,725,000 | $ 38,246,000 | $ 38,510,000 | $ 43,168,000 | $ 42,382,000 | $ 38,594,000 | $ 48,802,000 | $ 49,372,000 | 177,100,000 | 164,283,000 | 173,516,000
Decrease in cost of sales |  | $ 38,725,000 | $ 38,246,000 | $ 38,510,000 | $ 43,168,000 | $ 42,382,000 | $ 38,594,000 | $ 48,802,000 | $ 49,372,000 | $ 177,100,000 | $ 164,283,000 | $ 173,516,000
Accounting Standards Update 2016-02 [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Additional lease assets | $ 240,000,000 |  |  |  |  |  |  |  |  |  |  |
Additional lease liabilities | 290,000,000 |  |  |  |  |  |  |  |  |  |  |
Retained earnings | 27,000,000 |  |  |  |  |  |  |  |  |  |  |
Deferred income tax | $ 9,000,000 |  |  |  |  |  |  |  |  |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Percentage of revenues recognized at a point in time |  |  |  |  |  |  |  |  |  | 99.00% |  |
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 |  |  |  |  |  |  |  |  |  | 10 years |  |

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