Business Combinations - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended	12 Months Ended		1 Months Ended	3 Months Ended	12 Months Ended			1 Months Ended
	Oct. 31, 2008 Tollytots Limited	Jun. 30, 2009 Tollytots Limited	Dec. 31, 2011 Tollytots Limited	Dec. 31, 2010 Tollytots Limited	Oct. 31, 2008 Kids Only acquisition	Jun. 30, 2009 Kids Only acquisition	Dec. 31, 2011 Kids Only acquisition	Dec. 31, 2010 Kids Only acquisition	Dec. 31, 2009 Kids Only acquisition	Oct. 31, 2011 Moose Mountain	Dec. 31, 2011 Moose Mountain
Business Acquisition [Line Items]
Business acquisition total initial consideration	$ 26.8				$ 23.8					$ 31.5
Business acquisition, cash paid	12.0				20.4					16.0
Business acquisition, liabilities assumed	14.8				3.4					15.5
Goodwill acquired in business combination	4.1				13.2					13.5
Write-down of goodwill		4.1				13.2
Business acquisition maximum additional earn-out payment	5.0				5.6					5.3
Additional earn-out payment period	3 years				3 years					3 years
Earn-out payment			1.7	1.7			1.8	1.9	1.9
Fair value of the expected earn-out included in goodwill and assumed liabilities											$ 4.6