Goodwill and Intangible Assets - Additional Information (Detail) (USD $)	1 Months Ended		9 Months Ended			3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended
	Mar. 31, 2012	Feb. 29, 2012	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011	Sep. 30, 2012 Cost of sales	Sep. 30, 2012 Cost of sales	Sep. 30, 2012 Operating expenses	Sep. 30, 2012 Operating expenses
Goodwill and Intangible Assets Disclosure [Line Items]
Aggregate amortization expense on intangible assets			$ 2,645,000	$ 1,793,000
Impairment charges related to uPlay, LLC acquisition			4,527,000
Write-off goodwill related to uPlay, LLC acquisition			629,000
Impairment charges			17,056,000	5,413,000		9,892,000	9,892,000	1,425,000	1,425,000
Proceeds from sales of intangible assets	19,900,000	6,961,000	26,861,000
Net book value of intangible assets sold	20,244,000
Pre-tax net gain from sale of intangible assets			6,602,000
Goodwill			28,853,000		29,203,000
Decrease in goodwill offset amount due to foreign currency fluctuations			279,000
Gross goodwill before impairments			$ 30,602,000		$ 30,323,000