Business Combinations - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended
	Jul. 26, 2012 Maui, Inc.	Sep. 14, 2012 JKID, LTD. Installment
Business Acquisition [Line Items]
Business acquisition, total initial consideration	$ 37.6
Business acquisition, cash paid	36.2	1.1
Business acquisition, liabilities assumed	1.4
Business acquisition maximum additional earn-out payment	18.0	4.4
Additional earn-out payment period	3 years	2 years
Fair value of the expected earn-out included in goodwill	16.0
Business acquisition, deferred cash payment		5.5
Business acquisition, deferred cash payment in installment		$ 1.1
Number of semi-annual payment of deferred cash payment		5