Goodwill and Intangible Assets (Detail) - Carrying Amounts of Amortizable Intangible Assets (USD $) In Thousands, unless otherwise specified	9 Months Ended		12 Months Ended
	Sep. 30, 2012		Dec. 31, 2011
Gross cost	$ 12,968		$ 12,968
Additions due to acquisition (1)	8,535	[1]
Foreign currency translation adjustments	593		0
Gross cost	22,096		12,968
Accumulated amortization (2)	(8,954)	[2]	(5,908)	[2]
Net	13,142		7,060
Ideas International Limited [Member]
Additions due to acquisition (1)	8,500
Trade Names [Member]
Gross cost	5,758		5,758
Additions due to acquisition (1)	240	[1]
Foreign currency translation adjustments	18		0
Gross cost	6,016		5,758
Accumulated amortization (2)	(3,210)	[2]	(2,303)	[2]
Net	2,806		3,455
Customer Relationships [Member]
Gross cost	7,210		7,210
Additions due to acquisition (1)	3,170	[1]
Foreign currency translation adjustments	207		0
Gross cost	10,587		7,210
Accumulated amortization (2)	(5,238)	[2]	(3,605)	[2]
Net	5,349		3,605
Media Content [Member]
Additions due to acquisition (1)	3,170	[1]
Foreign currency translation adjustments	234		0
Gross cost	3,404
Accumulated amortization (2)	(284)	[2]		[2]
Net	3,120
Computer Software, Intangible Asset [Member]
Additions due to acquisition (1)	1,955	[1]
Foreign currency translation adjustments	134		0
Gross cost	2,089
Accumulated amortization (2)	(222)	[2]		[2]
Net	$ 1,867

[1] The Company acquired Ideas International in the second quarter of 2012 and recorded a total of $8.5 million of amortizable intangible assets. See Note 2-Acquisition above for additional information.

[2] Intangible assets are being amortized against earnings over the following periods: Trade name-2 to 5 years; Customer relationships-4 years; Content-4 years; Software-3 years.