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Business Combinations - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 1 Months Ended 3 Months Ended 1 Months Ended 3 Months Ended 12 Months Ended 1 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended
Oct. 31, 2011
Moose Mountain Toymakers Limited
Mar. 31, 2012
Moose Mountain Toymakers Limited
Dec. 31, 2011
Moose Mountain Toymakers Limited
Oct. 31, 2008
Tollytots Limited
Mar. 31, 2012
Tollytots Limited
Jun. 30, 2009
Tollytots Limited
Dec. 31, 2011
Tollytots Limited
Dec. 31, 2010
Tollytots Limited
Oct. 31, 2008
Kids Only, Inc. and Kids Only Limited
Jun. 30, 2009
Kids Only, Inc. and Kids Only Limited
Sep. 30, 2011
Kids Only, Inc. and Kids Only Limited
Sep. 30, 2010
Kids Only, Inc. and Kids Only Limited
Sep. 30, 2009
Kids Only, Inc. and Kids Only Limited
Mar. 31, 2011
Tollytots and Kids Only
Business Acquisition [Line Items]                            
Business acquisition total initial consideration $ 32.2     $ 26.8         $ 23.8          
Business acquisition, cash paid 16.7     12.0         20.4          
Business acquisition, liabilities assumed 15.5     14.8         3.4          
Goodwill acquired in business combination 14.2     4.1         13.2          
Goodwill written off           4.1       13.2        
Business acquisition maximum additional earn-out payment 5.3     5.0         5.6          
Additional earn-out payment period 3 years     3 years         3 years          
Amount of earn-out earned during period             1.7 1.7     1.8 1.9 1.9  
Fair value of the expected earn-out     4.6                      
Amount of earn-out paid during period         1.7                 3.6
Working capital adjustment related to acquisition   $ 0.7