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Summary of Significant Accounting Policies and Basis of Presentation - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Jan. 02, 2016 | Jan. 03, 2015
Significant Accounting Policies And Basis Of Presentation [Line Items] |  |  |
Allowance for doubtful accounts | $ 6.7 | $ 6.8 |
Bad debt expenses | $ 1.4 | $ 2.1 | $ 3.0
Inventories valued on LIFO method | 86.70% | 88.20% |
Under Value of carrying value of inventories than its replacement value | $ 47.6 | $ 49.5 |
Effect on income due to change in LIFO valuation on liquidation | 0.2 | 0.6 | $ 0.8
Capitalized computer software | 32.9 | 20.3 |
Workers' compensation liability | 0.5 |  |
Health care insurance liability | 0.5 |  |
Current portion of self insurance liability | 8.3 | 8.2 |
Long term portion of self insurance liability | $ 6.4 | $ 6.2 |
Weighted average shares not included in EPS calculations | 0 | 0 | 322,914
Issuance of preferred stock | 10,000,000 | 10,000,000 |
Preferred stock, shares outstanding | 0 | 0 |
Advertising expenses | $ 46.6 | $ 47.7 | $ 41.1
Accounting Standard Update 2015-03 [Member] | Other Assets, Net and Long-term Debt [Member] |  |  |
Significant Accounting Policies And Basis Of Presentation [Line Items] |  |  |
Decrease in assets and liabilities for fiscal 2016 |  | $ 8.2 |
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 | 12 years |  |

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