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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