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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
 1 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended
Dec. 20, 2011
Nov. 30, 2011
Mar. 31, 2012
Apr. 02, 2011
Apr. 03, 2010
Jun. 30, 2012
Stock Options
Mar. 31, 2012
Stock Options
Mar. 31, 2012
Stock Options
Minimum
Mar. 31, 2012
Stock Options
Maximum
Jun. 30, 2012
Performance Based Stock Options [Member]
Jun. 30, 2012
Foreign Exchange Forward
Not Designated as Hedging Instrument
Mar. 31, 2012
Foreign Exchange Forward
Not Designated as Hedging Instrument
Jun. 30, 2012
Foreign Exchange Forward
Cost of Sales
Not Designated as Hedging Instrument
Mar. 31, 2012
Foreign Exchange Forward
Cost of Sales
Not Designated as Hedging Instrument
Apr. 02, 2011
Foreign Exchange Forward
Cost of Sales
Not Designated as Hedging Instrument
Apr. 03, 2010
Foreign Exchange Forward
Cost of Sales
Not Designated as Hedging Instrument
Jun. 30, 2012
Trademarks
Mar. 31, 2012
Trademarks
Mar. 31, 2012
Equipment, Furniture and Fixtures, and Computer Hardware and Software
Mar. 31, 2012
In-Store Shops
Mar. 31, 2012
Software Development
Significant Accounting Policies [Line Items]                                          
Advertising expense     $ 31.4 $ 27.4 $ 22.4                                
Cooperative advertising Expenses     4.3 3.9 3.4                                
Shipping and handling costs     19.7 12.4 8.3                                
Property, plant and equipment, useful life                                     5 years 3 years 5 years
Intangible asset, useful life                                 20 years 20 years      
Share-based compensation, fair value assumption, expected holding period               4 years 6 months 9 years 6 months                        
Share-based compensation, service period requirement               9 years 10 years                        
Share-based compensation, vesting period             4 years                            
Share-based compensation, contractual term             7 years                            
Share-based compensation, holding period               4 years 6 months 4 years 9 months                        
Gain (loss) on forward contracts                         0.8 2.6 (2.5) (1.0)          
Forward contracts term, maximum                     18 months 18 months                  
Notional amount of forward contract                     94.4 51.2                  
Deferred finance cost     2.4 0.2                                  
Accumulated amortization of deferred finance cost     $ 1.3 $ 0.8                                  
Share split ratio 3.8 3.8                                      
Anti-dilutive securities excluded from computation of earning per share           105,755 343,787     1,044,000