Business and Basis of Presentation - Additional Information (Detail)  | 
 Apr. 29, 2017  
State  
Store 
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| Organization, Consolidation and Presentation of Financial Statements [Abstract] | |
| Number of stores | Store | 990 | 
| Number of states in which entity operates | State | 48 | 
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- Definition The number of states the entity operates in as of the balance sheet date. No definition available. 
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| X | ||||||||||
- Definition Represents the number of stores. No definition available. 
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| X | ||||||||||
- References No definition available. 
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