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Property and Equipment - Additional Information (Detail) (USD $)
 3 Months Ended 12 Months Ended
Jun. 30, 2012
Jul. 02, 2011
Mar. 31, 2012
Store
Apr. 02, 2011
Store
Apr. 03, 2010
Property, Plant and Equipment [Line Items]          
Depreciation and amortization of property and equipment $ 12,700,000 $ 8,100,000 $ 36,000,000 $ 23,600,000 $ 17,100,000
Impairment of long-lived assets     3,292,000 3,834,000  
Number of stores impaired     2 2  
Property, Plant and Equipment, Other Types
          
Property, Plant and Equipment [Line Items]          
Impairment of long-lived assets     $ 3,292,000 $ 2,052,000 $ 42,000