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Business Combinations - Additional Information (Detail) (USD $)
 1 Months Ended 1 Months Ended
Jun. 30, 2013
Dec. 31, 2012
Oct. 31, 2011
Moose Mountain
Dec. 31, 2012
Moose Mountain
Jul. 26, 2012
Maui, Inc.
Sep. 14, 2012
JKID, LTD.
Installment
Business Acquisition [Line Items]            
Business acquisition, total initial consideration     $ 32,200,000   $ 37,600,000  
Business acquisition, cash paid     16,700,000   36,200,000 1,100,000
Business acquisition, liabilities assumed     15,500,000   1,400,000  
Goodwill acquired in business combination 48,502,000 48,836,000 [1] 14,200,000      
Business acquisition maximum additional earn-out payment     5,300,000   18,000,000 4,400,000
Additional earn-out payment period     3 years   3 years 2 years
Fair value of the expected earn-out included in goodwill       4,600,000 16,000,000  
Business acquisition, deferred cash payment           5,500,000
Business acquisition, deferred cash payment in installment           $ 1,100,000
Number of semi-annual payment of deferred cash payment           5
[1] Derived from audited financial statements